1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Driver for Marvell PPv2 network controller for Armada 375 SoC.
4  *
5  * Copyright (C) 2014 Marvell
6  *
7  * Marcin Wojtas <mw@semihalf.com>
8  */
9 
10 #include <linux/acpi.h>
11 #include <linux/kernel.h>
12 #include <linux/netdevice.h>
13 #include <linux/etherdevice.h>
14 #include <linux/platform_device.h>
15 #include <linux/skbuff.h>
16 #include <linux/inetdevice.h>
17 #include <linux/mbus.h>
18 #include <linux/module.h>
19 #include <linux/mfd/syscon.h>
20 #include <linux/interrupt.h>
21 #include <linux/cpumask.h>
22 #include <linux/of.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_mdio.h>
25 #include <linux/of_net.h>
26 #include <linux/of_address.h>
27 #include <linux/of_device.h>
28 #include <linux/phy.h>
29 #include <linux/phylink.h>
30 #include <linux/phy/phy.h>
31 #include <linux/ptp_classify.h>
32 #include <linux/clk.h>
33 #include <linux/hrtimer.h>
34 #include <linux/ktime.h>
35 #include <linux/regmap.h>
36 #include <uapi/linux/ppp_defs.h>
37 #include <net/ip.h>
38 #include <net/ipv6.h>
39 #include <net/tso.h>
40 #include <linux/bpf_trace.h>
41 
42 #include "mvpp2.h"
43 #include "mvpp2_prs.h"
44 #include "mvpp2_cls.h"
45 
46 enum mvpp2_bm_pool_log_num {
47 	MVPP2_BM_SHORT,
48 	MVPP2_BM_LONG,
49 	MVPP2_BM_JUMBO,
50 	MVPP2_BM_POOLS_NUM
51 };
52 
53 static struct {
54 	int pkt_size;
55 	int buf_num;
56 } mvpp2_pools[MVPP2_BM_POOLS_NUM];
57 
58 /* The prototype is added here to be used in start_dev when using ACPI. This
59  * will be removed once phylink is used for all modes (dt+ACPI).
60  */
61 static void mvpp2_acpi_start(struct mvpp2_port *port);
62 
63 /* Queue modes */
64 #define MVPP2_QDIST_SINGLE_MODE	0
65 #define MVPP2_QDIST_MULTI_MODE	1
66 
67 static int queue_mode = MVPP2_QDIST_MULTI_MODE;
68 
69 module_param(queue_mode, int, 0444);
70 MODULE_PARM_DESC(queue_mode, "Set queue_mode (single=0, multi=1)");
71 
72 /* Utility/helper methods */
73 
74 void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data)
75 {
76 	writel(data, priv->swth_base[0] + offset);
77 }
78 
79 u32 mvpp2_read(struct mvpp2 *priv, u32 offset)
80 {
81 	return readl(priv->swth_base[0] + offset);
82 }
83 
84 static u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset)
85 {
86 	return readl_relaxed(priv->swth_base[0] + offset);
87 }
88 
89 static inline u32 mvpp2_cpu_to_thread(struct mvpp2 *priv, int cpu)
90 {
91 	return cpu % priv->nthreads;
92 }
93 
94 static void mvpp2_cm3_write(struct mvpp2 *priv, u32 offset, u32 data)
95 {
96 	writel(data, priv->cm3_base + offset);
97 }
98 
99 static u32 mvpp2_cm3_read(struct mvpp2 *priv, u32 offset)
100 {
101 	return readl(priv->cm3_base + offset);
102 }
103 
104 static struct page_pool *
105 mvpp2_create_page_pool(struct device *dev, int num, int len,
106 		       enum dma_data_direction dma_dir)
107 {
108 	struct page_pool_params pp_params = {
109 		/* internal DMA mapping in page_pool */
110 		.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
111 		.pool_size = num,
112 		.nid = NUMA_NO_NODE,
113 		.dev = dev,
114 		.dma_dir = dma_dir,
115 		.offset = MVPP2_SKB_HEADROOM,
116 		.max_len = len,
117 	};
118 
119 	return page_pool_create(&pp_params);
120 }
121 
122 /* These accessors should be used to access:
123  *
124  * - per-thread registers, where each thread has its own copy of the
125  *   register.
126  *
127  *   MVPP2_BM_VIRT_ALLOC_REG
128  *   MVPP2_BM_ADDR_HIGH_ALLOC
129  *   MVPP22_BM_ADDR_HIGH_RLS_REG
130  *   MVPP2_BM_VIRT_RLS_REG
131  *   MVPP2_ISR_RX_TX_CAUSE_REG
132  *   MVPP2_ISR_RX_TX_MASK_REG
133  *   MVPP2_TXQ_NUM_REG
134  *   MVPP2_AGGR_TXQ_UPDATE_REG
135  *   MVPP2_TXQ_RSVD_REQ_REG
136  *   MVPP2_TXQ_RSVD_RSLT_REG
137  *   MVPP2_TXQ_SENT_REG
138  *   MVPP2_RXQ_NUM_REG
139  *
140  * - global registers that must be accessed through a specific thread
141  *   window, because they are related to an access to a per-thread
142  *   register
143  *
144  *   MVPP2_BM_PHY_ALLOC_REG    (related to MVPP2_BM_VIRT_ALLOC_REG)
145  *   MVPP2_BM_PHY_RLS_REG      (related to MVPP2_BM_VIRT_RLS_REG)
146  *   MVPP2_RXQ_THRESH_REG      (related to MVPP2_RXQ_NUM_REG)
147  *   MVPP2_RXQ_DESC_ADDR_REG   (related to MVPP2_RXQ_NUM_REG)
148  *   MVPP2_RXQ_DESC_SIZE_REG   (related to MVPP2_RXQ_NUM_REG)
149  *   MVPP2_RXQ_INDEX_REG       (related to MVPP2_RXQ_NUM_REG)
150  *   MVPP2_TXQ_PENDING_REG     (related to MVPP2_TXQ_NUM_REG)
151  *   MVPP2_TXQ_DESC_ADDR_REG   (related to MVPP2_TXQ_NUM_REG)
152  *   MVPP2_TXQ_DESC_SIZE_REG   (related to MVPP2_TXQ_NUM_REG)
153  *   MVPP2_TXQ_INDEX_REG       (related to MVPP2_TXQ_NUM_REG)
154  *   MVPP2_TXQ_PENDING_REG     (related to MVPP2_TXQ_NUM_REG)
155  *   MVPP2_TXQ_PREF_BUF_REG    (related to MVPP2_TXQ_NUM_REG)
156  *   MVPP2_TXQ_PREF_BUF_REG    (related to MVPP2_TXQ_NUM_REG)
157  */
158 static void mvpp2_thread_write(struct mvpp2 *priv, unsigned int thread,
159 			       u32 offset, u32 data)
160 {
161 	writel(data, priv->swth_base[thread] + offset);
162 }
163 
164 static u32 mvpp2_thread_read(struct mvpp2 *priv, unsigned int thread,
165 			     u32 offset)
166 {
167 	return readl(priv->swth_base[thread] + offset);
168 }
169 
170 static void mvpp2_thread_write_relaxed(struct mvpp2 *priv, unsigned int thread,
171 				       u32 offset, u32 data)
172 {
173 	writel_relaxed(data, priv->swth_base[thread] + offset);
174 }
175 
176 static u32 mvpp2_thread_read_relaxed(struct mvpp2 *priv, unsigned int thread,
177 				     u32 offset)
178 {
179 	return readl_relaxed(priv->swth_base[thread] + offset);
180 }
181 
182 static dma_addr_t mvpp2_txdesc_dma_addr_get(struct mvpp2_port *port,
183 					    struct mvpp2_tx_desc *tx_desc)
184 {
185 	if (port->priv->hw_version == MVPP21)
186 		return le32_to_cpu(tx_desc->pp21.buf_dma_addr);
187 	else
188 		return le64_to_cpu(tx_desc->pp22.buf_dma_addr_ptp) &
189 		       MVPP2_DESC_DMA_MASK;
190 }
191 
192 static void mvpp2_txdesc_dma_addr_set(struct mvpp2_port *port,
193 				      struct mvpp2_tx_desc *tx_desc,
194 				      dma_addr_t dma_addr)
195 {
196 	dma_addr_t addr, offset;
197 
198 	addr = dma_addr & ~MVPP2_TX_DESC_ALIGN;
199 	offset = dma_addr & MVPP2_TX_DESC_ALIGN;
200 
201 	if (port->priv->hw_version == MVPP21) {
202 		tx_desc->pp21.buf_dma_addr = cpu_to_le32(addr);
203 		tx_desc->pp21.packet_offset = offset;
204 	} else {
205 		__le64 val = cpu_to_le64(addr);
206 
207 		tx_desc->pp22.buf_dma_addr_ptp &= ~cpu_to_le64(MVPP2_DESC_DMA_MASK);
208 		tx_desc->pp22.buf_dma_addr_ptp |= val;
209 		tx_desc->pp22.packet_offset = offset;
210 	}
211 }
212 
213 static size_t mvpp2_txdesc_size_get(struct mvpp2_port *port,
214 				    struct mvpp2_tx_desc *tx_desc)
215 {
216 	if (port->priv->hw_version == MVPP21)
217 		return le16_to_cpu(tx_desc->pp21.data_size);
218 	else
219 		return le16_to_cpu(tx_desc->pp22.data_size);
220 }
221 
222 static void mvpp2_txdesc_size_set(struct mvpp2_port *port,
223 				  struct mvpp2_tx_desc *tx_desc,
224 				  size_t size)
225 {
226 	if (port->priv->hw_version == MVPP21)
227 		tx_desc->pp21.data_size = cpu_to_le16(size);
228 	else
229 		tx_desc->pp22.data_size = cpu_to_le16(size);
230 }
231 
232 static void mvpp2_txdesc_txq_set(struct mvpp2_port *port,
233 				 struct mvpp2_tx_desc *tx_desc,
234 				 unsigned int txq)
235 {
236 	if (port->priv->hw_version == MVPP21)
237 		tx_desc->pp21.phys_txq = txq;
238 	else
239 		tx_desc->pp22.phys_txq = txq;
240 }
241 
242 static void mvpp2_txdesc_cmd_set(struct mvpp2_port *port,
243 				 struct mvpp2_tx_desc *tx_desc,
244 				 unsigned int command)
245 {
246 	if (port->priv->hw_version == MVPP21)
247 		tx_desc->pp21.command = cpu_to_le32(command);
248 	else
249 		tx_desc->pp22.command = cpu_to_le32(command);
250 }
251 
252 static unsigned int mvpp2_txdesc_offset_get(struct mvpp2_port *port,
253 					    struct mvpp2_tx_desc *tx_desc)
254 {
255 	if (port->priv->hw_version == MVPP21)
256 		return tx_desc->pp21.packet_offset;
257 	else
258 		return tx_desc->pp22.packet_offset;
259 }
260 
261 static dma_addr_t mvpp2_rxdesc_dma_addr_get(struct mvpp2_port *port,
262 					    struct mvpp2_rx_desc *rx_desc)
263 {
264 	if (port->priv->hw_version == MVPP21)
265 		return le32_to_cpu(rx_desc->pp21.buf_dma_addr);
266 	else
267 		return le64_to_cpu(rx_desc->pp22.buf_dma_addr_key_hash) &
268 		       MVPP2_DESC_DMA_MASK;
269 }
270 
271 static unsigned long mvpp2_rxdesc_cookie_get(struct mvpp2_port *port,
272 					     struct mvpp2_rx_desc *rx_desc)
273 {
274 	if (port->priv->hw_version == MVPP21)
275 		return le32_to_cpu(rx_desc->pp21.buf_cookie);
276 	else
277 		return le64_to_cpu(rx_desc->pp22.buf_cookie_misc) &
278 		       MVPP2_DESC_DMA_MASK;
279 }
280 
281 static size_t mvpp2_rxdesc_size_get(struct mvpp2_port *port,
282 				    struct mvpp2_rx_desc *rx_desc)
283 {
284 	if (port->priv->hw_version == MVPP21)
285 		return le16_to_cpu(rx_desc->pp21.data_size);
286 	else
287 		return le16_to_cpu(rx_desc->pp22.data_size);
288 }
289 
290 static u32 mvpp2_rxdesc_status_get(struct mvpp2_port *port,
291 				   struct mvpp2_rx_desc *rx_desc)
292 {
293 	if (port->priv->hw_version == MVPP21)
294 		return le32_to_cpu(rx_desc->pp21.status);
295 	else
296 		return le32_to_cpu(rx_desc->pp22.status);
297 }
298 
299 static void mvpp2_txq_inc_get(struct mvpp2_txq_pcpu *txq_pcpu)
300 {
301 	txq_pcpu->txq_get_index++;
302 	if (txq_pcpu->txq_get_index == txq_pcpu->size)
303 		txq_pcpu->txq_get_index = 0;
304 }
305 
306 static void mvpp2_txq_inc_put(struct mvpp2_port *port,
307 			      struct mvpp2_txq_pcpu *txq_pcpu,
308 			      void *data,
309 			      struct mvpp2_tx_desc *tx_desc,
310 			      enum mvpp2_tx_buf_type buf_type)
311 {
312 	struct mvpp2_txq_pcpu_buf *tx_buf =
313 		txq_pcpu->buffs + txq_pcpu->txq_put_index;
314 	tx_buf->type = buf_type;
315 	if (buf_type == MVPP2_TYPE_SKB)
316 		tx_buf->skb = data;
317 	else
318 		tx_buf->xdpf = data;
319 	tx_buf->size = mvpp2_txdesc_size_get(port, tx_desc);
320 	tx_buf->dma = mvpp2_txdesc_dma_addr_get(port, tx_desc) +
321 		mvpp2_txdesc_offset_get(port, tx_desc);
322 	txq_pcpu->txq_put_index++;
323 	if (txq_pcpu->txq_put_index == txq_pcpu->size)
324 		txq_pcpu->txq_put_index = 0;
325 }
326 
327 /* Get number of maximum RXQ */
328 static int mvpp2_get_nrxqs(struct mvpp2 *priv)
329 {
330 	unsigned int nrxqs;
331 
332 	if (priv->hw_version >= MVPP22 && queue_mode == MVPP2_QDIST_SINGLE_MODE)
333 		return 1;
334 
335 	/* According to the PPv2.2 datasheet and our experiments on
336 	 * PPv2.1, RX queues have an allocation granularity of 4 (when
337 	 * more than a single one on PPv2.2).
338 	 * Round up to nearest multiple of 4.
339 	 */
340 	nrxqs = (num_possible_cpus() + 3) & ~0x3;
341 	if (nrxqs > MVPP2_PORT_MAX_RXQ)
342 		nrxqs = MVPP2_PORT_MAX_RXQ;
343 
344 	return nrxqs;
345 }
346 
347 /* Get number of physical egress port */
348 static inline int mvpp2_egress_port(struct mvpp2_port *port)
349 {
350 	return MVPP2_MAX_TCONT + port->id;
351 }
352 
353 /* Get number of physical TXQ */
354 static inline int mvpp2_txq_phys(int port, int txq)
355 {
356 	return (MVPP2_MAX_TCONT + port) * MVPP2_MAX_TXQ + txq;
357 }
358 
359 /* Returns a struct page if page_pool is set, otherwise a buffer */
360 static void *mvpp2_frag_alloc(const struct mvpp2_bm_pool *pool,
361 			      struct page_pool *page_pool)
362 {
363 	if (page_pool)
364 		return page_pool_dev_alloc_pages(page_pool);
365 
366 	if (likely(pool->frag_size <= PAGE_SIZE))
367 		return netdev_alloc_frag(pool->frag_size);
368 
369 	return kmalloc(pool->frag_size, GFP_ATOMIC);
370 }
371 
372 static void mvpp2_frag_free(const struct mvpp2_bm_pool *pool,
373 			    struct page_pool *page_pool, void *data)
374 {
375 	if (page_pool)
376 		page_pool_put_full_page(page_pool, virt_to_head_page(data), false);
377 	else if (likely(pool->frag_size <= PAGE_SIZE))
378 		skb_free_frag(data);
379 	else
380 		kfree(data);
381 }
382 
383 /* Buffer Manager configuration routines */
384 
385 /* Create pool */
386 static int mvpp2_bm_pool_create(struct device *dev, struct mvpp2 *priv,
387 				struct mvpp2_bm_pool *bm_pool, int size)
388 {
389 	u32 val;
390 
391 	/* Number of buffer pointers must be a multiple of 16, as per
392 	 * hardware constraints
393 	 */
394 	if (!IS_ALIGNED(size, 16))
395 		return -EINVAL;
396 
397 	/* PPv2.1 needs 8 bytes per buffer pointer, PPv2.2 and PPv2.3 needs 16
398 	 * bytes per buffer pointer
399 	 */
400 	if (priv->hw_version == MVPP21)
401 		bm_pool->size_bytes = 2 * sizeof(u32) * size;
402 	else
403 		bm_pool->size_bytes = 2 * sizeof(u64) * size;
404 
405 	bm_pool->virt_addr = dma_alloc_coherent(dev, bm_pool->size_bytes,
406 						&bm_pool->dma_addr,
407 						GFP_KERNEL);
408 	if (!bm_pool->virt_addr)
409 		return -ENOMEM;
410 
411 	if (!IS_ALIGNED((unsigned long)bm_pool->virt_addr,
412 			MVPP2_BM_POOL_PTR_ALIGN)) {
413 		dma_free_coherent(dev, bm_pool->size_bytes,
414 				  bm_pool->virt_addr, bm_pool->dma_addr);
415 		dev_err(dev, "BM pool %d is not %d bytes aligned\n",
416 			bm_pool->id, MVPP2_BM_POOL_PTR_ALIGN);
417 		return -ENOMEM;
418 	}
419 
420 	mvpp2_write(priv, MVPP2_BM_POOL_BASE_REG(bm_pool->id),
421 		    lower_32_bits(bm_pool->dma_addr));
422 	mvpp2_write(priv, MVPP2_BM_POOL_SIZE_REG(bm_pool->id), size);
423 
424 	val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id));
425 	val |= MVPP2_BM_START_MASK;
426 
427 	val &= ~MVPP2_BM_LOW_THRESH_MASK;
428 	val &= ~MVPP2_BM_HIGH_THRESH_MASK;
429 
430 	/* Set 8 Pools BPPI threshold for MVPP23 */
431 	if (priv->hw_version == MVPP23) {
432 		val |= MVPP2_BM_LOW_THRESH_VALUE(MVPP23_BM_BPPI_LOW_THRESH);
433 		val |= MVPP2_BM_HIGH_THRESH_VALUE(MVPP23_BM_BPPI_HIGH_THRESH);
434 	} else {
435 		val |= MVPP2_BM_LOW_THRESH_VALUE(MVPP2_BM_BPPI_LOW_THRESH);
436 		val |= MVPP2_BM_HIGH_THRESH_VALUE(MVPP2_BM_BPPI_HIGH_THRESH);
437 	}
438 
439 	mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val);
440 
441 	bm_pool->size = size;
442 	bm_pool->pkt_size = 0;
443 	bm_pool->buf_num = 0;
444 
445 	return 0;
446 }
447 
448 /* Set pool buffer size */
449 static void mvpp2_bm_pool_bufsize_set(struct mvpp2 *priv,
450 				      struct mvpp2_bm_pool *bm_pool,
451 				      int buf_size)
452 {
453 	u32 val;
454 
455 	bm_pool->buf_size = buf_size;
456 
457 	val = ALIGN(buf_size, 1 << MVPP2_POOL_BUF_SIZE_OFFSET);
458 	mvpp2_write(priv, MVPP2_POOL_BUF_SIZE_REG(bm_pool->id), val);
459 }
460 
461 static void mvpp2_bm_bufs_get_addrs(struct device *dev, struct mvpp2 *priv,
462 				    struct mvpp2_bm_pool *bm_pool,
463 				    dma_addr_t *dma_addr,
464 				    phys_addr_t *phys_addr)
465 {
466 	unsigned int thread = mvpp2_cpu_to_thread(priv, get_cpu());
467 
468 	*dma_addr = mvpp2_thread_read(priv, thread,
469 				      MVPP2_BM_PHY_ALLOC_REG(bm_pool->id));
470 	*phys_addr = mvpp2_thread_read(priv, thread, MVPP2_BM_VIRT_ALLOC_REG);
471 
472 	if (priv->hw_version >= MVPP22) {
473 		u32 val;
474 		u32 dma_addr_highbits, phys_addr_highbits;
475 
476 		val = mvpp2_thread_read(priv, thread, MVPP22_BM_ADDR_HIGH_ALLOC);
477 		dma_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_PHYS_MASK);
478 		phys_addr_highbits = (val & MVPP22_BM_ADDR_HIGH_VIRT_MASK) >>
479 			MVPP22_BM_ADDR_HIGH_VIRT_SHIFT;
480 
481 		if (sizeof(dma_addr_t) == 8)
482 			*dma_addr |= (u64)dma_addr_highbits << 32;
483 
484 		if (sizeof(phys_addr_t) == 8)
485 			*phys_addr |= (u64)phys_addr_highbits << 32;
486 	}
487 
488 	put_cpu();
489 }
490 
491 /* Free all buffers from the pool */
492 static void mvpp2_bm_bufs_free(struct device *dev, struct mvpp2 *priv,
493 			       struct mvpp2_bm_pool *bm_pool, int buf_num)
494 {
495 	struct page_pool *pp = NULL;
496 	int i;
497 
498 	if (buf_num > bm_pool->buf_num) {
499 		WARN(1, "Pool does not have so many bufs pool(%d) bufs(%d)\n",
500 		     bm_pool->id, buf_num);
501 		buf_num = bm_pool->buf_num;
502 	}
503 
504 	if (priv->percpu_pools)
505 		pp = priv->page_pool[bm_pool->id];
506 
507 	for (i = 0; i < buf_num; i++) {
508 		dma_addr_t buf_dma_addr;
509 		phys_addr_t buf_phys_addr;
510 		void *data;
511 
512 		mvpp2_bm_bufs_get_addrs(dev, priv, bm_pool,
513 					&buf_dma_addr, &buf_phys_addr);
514 
515 		if (!pp)
516 			dma_unmap_single(dev, buf_dma_addr,
517 					 bm_pool->buf_size, DMA_FROM_DEVICE);
518 
519 		data = (void *)phys_to_virt(buf_phys_addr);
520 		if (!data)
521 			break;
522 
523 		mvpp2_frag_free(bm_pool, pp, data);
524 	}
525 
526 	/* Update BM driver with number of buffers removed from pool */
527 	bm_pool->buf_num -= i;
528 }
529 
530 /* Check number of buffers in BM pool */
531 static int mvpp2_check_hw_buf_num(struct mvpp2 *priv, struct mvpp2_bm_pool *bm_pool)
532 {
533 	int buf_num = 0;
534 
535 	buf_num += mvpp2_read(priv, MVPP2_BM_POOL_PTRS_NUM_REG(bm_pool->id)) &
536 				    MVPP22_BM_POOL_PTRS_NUM_MASK;
537 	buf_num += mvpp2_read(priv, MVPP2_BM_BPPI_PTRS_NUM_REG(bm_pool->id)) &
538 				    MVPP2_BM_BPPI_PTR_NUM_MASK;
539 
540 	/* HW has one buffer ready which is not reflected in the counters */
541 	if (buf_num)
542 		buf_num += 1;
543 
544 	return buf_num;
545 }
546 
547 /* Cleanup pool */
548 static int mvpp2_bm_pool_destroy(struct device *dev, struct mvpp2 *priv,
549 				 struct mvpp2_bm_pool *bm_pool)
550 {
551 	int buf_num;
552 	u32 val;
553 
554 	buf_num = mvpp2_check_hw_buf_num(priv, bm_pool);
555 	mvpp2_bm_bufs_free(dev, priv, bm_pool, buf_num);
556 
557 	/* Check buffer counters after free */
558 	buf_num = mvpp2_check_hw_buf_num(priv, bm_pool);
559 	if (buf_num) {
560 		WARN(1, "cannot free all buffers in pool %d, buf_num left %d\n",
561 		     bm_pool->id, bm_pool->buf_num);
562 		return 0;
563 	}
564 
565 	val = mvpp2_read(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id));
566 	val |= MVPP2_BM_STOP_MASK;
567 	mvpp2_write(priv, MVPP2_BM_POOL_CTRL_REG(bm_pool->id), val);
568 
569 	if (priv->percpu_pools) {
570 		page_pool_destroy(priv->page_pool[bm_pool->id]);
571 		priv->page_pool[bm_pool->id] = NULL;
572 	}
573 
574 	dma_free_coherent(dev, bm_pool->size_bytes,
575 			  bm_pool->virt_addr,
576 			  bm_pool->dma_addr);
577 	return 0;
578 }
579 
580 static int mvpp2_bm_pools_init(struct device *dev, struct mvpp2 *priv)
581 {
582 	int i, err, size, poolnum = MVPP2_BM_POOLS_NUM;
583 	struct mvpp2_bm_pool *bm_pool;
584 
585 	if (priv->percpu_pools)
586 		poolnum = mvpp2_get_nrxqs(priv) * 2;
587 
588 	/* Create all pools with maximum size */
589 	size = MVPP2_BM_POOL_SIZE_MAX;
590 	for (i = 0; i < poolnum; i++) {
591 		bm_pool = &priv->bm_pools[i];
592 		bm_pool->id = i;
593 		err = mvpp2_bm_pool_create(dev, priv, bm_pool, size);
594 		if (err)
595 			goto err_unroll_pools;
596 		mvpp2_bm_pool_bufsize_set(priv, bm_pool, 0);
597 	}
598 	return 0;
599 
600 err_unroll_pools:
601 	dev_err(dev, "failed to create BM pool %d, size %d\n", i, size);
602 	for (i = i - 1; i >= 0; i--)
603 		mvpp2_bm_pool_destroy(dev, priv, &priv->bm_pools[i]);
604 	return err;
605 }
606 
607 /* Routine enable PPv23 8 pool mode */
608 static void mvpp23_bm_set_8pool_mode(struct mvpp2 *priv)
609 {
610 	int val;
611 
612 	val = mvpp2_read(priv, MVPP22_BM_POOL_BASE_ADDR_HIGH_REG);
613 	val |= MVPP23_BM_8POOL_MODE;
614 	mvpp2_write(priv, MVPP22_BM_POOL_BASE_ADDR_HIGH_REG, val);
615 }
616 
617 static int mvpp2_bm_init(struct device *dev, struct mvpp2 *priv)
618 {
619 	enum dma_data_direction dma_dir = DMA_FROM_DEVICE;
620 	int i, err, poolnum = MVPP2_BM_POOLS_NUM;
621 	struct mvpp2_port *port;
622 
623 	if (priv->percpu_pools) {
624 		for (i = 0; i < priv->port_count; i++) {
625 			port = priv->port_list[i];
626 			if (port->xdp_prog) {
627 				dma_dir = DMA_BIDIRECTIONAL;
628 				break;
629 			}
630 		}
631 
632 		poolnum = mvpp2_get_nrxqs(priv) * 2;
633 		for (i = 0; i < poolnum; i++) {
634 			/* the pool in use */
635 			int pn = i / (poolnum / 2);
636 
637 			priv->page_pool[i] =
638 				mvpp2_create_page_pool(dev,
639 						       mvpp2_pools[pn].buf_num,
640 						       mvpp2_pools[pn].pkt_size,
641 						       dma_dir);
642 			if (IS_ERR(priv->page_pool[i])) {
643 				int j;
644 
645 				for (j = 0; j < i; j++) {
646 					page_pool_destroy(priv->page_pool[j]);
647 					priv->page_pool[j] = NULL;
648 				}
649 				return PTR_ERR(priv->page_pool[i]);
650 			}
651 		}
652 	}
653 
654 	dev_info(dev, "using %d %s buffers\n", poolnum,
655 		 priv->percpu_pools ? "per-cpu" : "shared");
656 
657 	for (i = 0; i < poolnum; i++) {
658 		/* Mask BM all interrupts */
659 		mvpp2_write(priv, MVPP2_BM_INTR_MASK_REG(i), 0);
660 		/* Clear BM cause register */
661 		mvpp2_write(priv, MVPP2_BM_INTR_CAUSE_REG(i), 0);
662 	}
663 
664 	/* Allocate and initialize BM pools */
665 	priv->bm_pools = devm_kcalloc(dev, poolnum,
666 				      sizeof(*priv->bm_pools), GFP_KERNEL);
667 	if (!priv->bm_pools)
668 		return -ENOMEM;
669 
670 	if (priv->hw_version == MVPP23)
671 		mvpp23_bm_set_8pool_mode(priv);
672 
673 	err = mvpp2_bm_pools_init(dev, priv);
674 	if (err < 0)
675 		return err;
676 	return 0;
677 }
678 
679 static void mvpp2_setup_bm_pool(void)
680 {
681 	/* Short pool */
682 	mvpp2_pools[MVPP2_BM_SHORT].buf_num  = MVPP2_BM_SHORT_BUF_NUM;
683 	mvpp2_pools[MVPP2_BM_SHORT].pkt_size = MVPP2_BM_SHORT_PKT_SIZE;
684 
685 	/* Long pool */
686 	mvpp2_pools[MVPP2_BM_LONG].buf_num  = MVPP2_BM_LONG_BUF_NUM;
687 	mvpp2_pools[MVPP2_BM_LONG].pkt_size = MVPP2_BM_LONG_PKT_SIZE;
688 
689 	/* Jumbo pool */
690 	mvpp2_pools[MVPP2_BM_JUMBO].buf_num  = MVPP2_BM_JUMBO_BUF_NUM;
691 	mvpp2_pools[MVPP2_BM_JUMBO].pkt_size = MVPP2_BM_JUMBO_PKT_SIZE;
692 }
693 
694 /* Attach long pool to rxq */
695 static void mvpp2_rxq_long_pool_set(struct mvpp2_port *port,
696 				    int lrxq, int long_pool)
697 {
698 	u32 val, mask;
699 	int prxq;
700 
701 	/* Get queue physical ID */
702 	prxq = port->rxqs[lrxq]->id;
703 
704 	if (port->priv->hw_version == MVPP21)
705 		mask = MVPP21_RXQ_POOL_LONG_MASK;
706 	else
707 		mask = MVPP22_RXQ_POOL_LONG_MASK;
708 
709 	val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
710 	val &= ~mask;
711 	val |= (long_pool << MVPP2_RXQ_POOL_LONG_OFFS) & mask;
712 	mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
713 }
714 
715 /* Attach short pool to rxq */
716 static void mvpp2_rxq_short_pool_set(struct mvpp2_port *port,
717 				     int lrxq, int short_pool)
718 {
719 	u32 val, mask;
720 	int prxq;
721 
722 	/* Get queue physical ID */
723 	prxq = port->rxqs[lrxq]->id;
724 
725 	if (port->priv->hw_version == MVPP21)
726 		mask = MVPP21_RXQ_POOL_SHORT_MASK;
727 	else
728 		mask = MVPP22_RXQ_POOL_SHORT_MASK;
729 
730 	val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
731 	val &= ~mask;
732 	val |= (short_pool << MVPP2_RXQ_POOL_SHORT_OFFS) & mask;
733 	mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
734 }
735 
736 static void *mvpp2_buf_alloc(struct mvpp2_port *port,
737 			     struct mvpp2_bm_pool *bm_pool,
738 			     struct page_pool *page_pool,
739 			     dma_addr_t *buf_dma_addr,
740 			     phys_addr_t *buf_phys_addr,
741 			     gfp_t gfp_mask)
742 {
743 	dma_addr_t dma_addr;
744 	struct page *page;
745 	void *data;
746 
747 	data = mvpp2_frag_alloc(bm_pool, page_pool);
748 	if (!data)
749 		return NULL;
750 
751 	if (page_pool) {
752 		page = (struct page *)data;
753 		dma_addr = page_pool_get_dma_addr(page);
754 		data = page_to_virt(page);
755 	} else {
756 		dma_addr = dma_map_single(port->dev->dev.parent, data,
757 					  MVPP2_RX_BUF_SIZE(bm_pool->pkt_size),
758 					  DMA_FROM_DEVICE);
759 		if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) {
760 			mvpp2_frag_free(bm_pool, NULL, data);
761 			return NULL;
762 		}
763 	}
764 	*buf_dma_addr = dma_addr;
765 	*buf_phys_addr = virt_to_phys(data);
766 
767 	return data;
768 }
769 
770 /* Routine enable flow control for RXQs condition */
771 static void mvpp2_rxq_enable_fc(struct mvpp2_port *port)
772 {
773 	int val, cm3_state, host_id, q;
774 	int fq = port->first_rxq;
775 	unsigned long flags;
776 
777 	spin_lock_irqsave(&port->priv->mss_spinlock, flags);
778 
779 	/* Remove Flow control enable bit to prevent race between FW and Kernel
780 	 * If Flow control was enabled, it would be re-enabled.
781 	 */
782 	val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
783 	cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
784 	val &= ~FLOW_CONTROL_ENABLE_BIT;
785 	mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
786 
787 	/* Set same Flow control for all RXQs */
788 	for (q = 0; q < port->nrxqs; q++) {
789 		/* Set stop and start Flow control RXQ thresholds */
790 		val = MSS_THRESHOLD_START;
791 		val |= (MSS_THRESHOLD_STOP << MSS_RXQ_TRESH_STOP_OFFS);
792 		mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val);
793 
794 		val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq));
795 		/* Set RXQ port ID */
796 		val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq));
797 		val |= (port->id << MSS_RXQ_ASS_Q_BASE(q, fq));
798 		val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq)
799 			+ MSS_RXQ_ASS_HOSTID_OFFS));
800 
801 		/* Calculate RXQ host ID:
802 		 * In Single queue mode: Host ID equal to Host ID used for
803 		 *			 shared RX interrupt
804 		 * In Multi queue mode: Host ID equal to number of
805 		 *			RXQ ID / number of CoS queues
806 		 * In Single resource mode: Host ID always equal to 0
807 		 */
808 		if (queue_mode == MVPP2_QDIST_SINGLE_MODE)
809 			host_id = port->nqvecs;
810 		else if (queue_mode == MVPP2_QDIST_MULTI_MODE)
811 			host_id = q;
812 		else
813 			host_id = 0;
814 
815 		/* Set RXQ host ID */
816 		val |= (host_id << (MSS_RXQ_ASS_Q_BASE(q, fq)
817 			+ MSS_RXQ_ASS_HOSTID_OFFS));
818 
819 		mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val);
820 	}
821 
822 	/* Notify Firmware that Flow control config space ready for update */
823 	val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
824 	val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
825 	val |= cm3_state;
826 	mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
827 
828 	spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
829 }
830 
831 /* Routine disable flow control for RXQs condition */
832 static void mvpp2_rxq_disable_fc(struct mvpp2_port *port)
833 {
834 	int val, cm3_state, q;
835 	unsigned long flags;
836 	int fq = port->first_rxq;
837 
838 	spin_lock_irqsave(&port->priv->mss_spinlock, flags);
839 
840 	/* Remove Flow control enable bit to prevent race between FW and Kernel
841 	 * If Flow control was enabled, it would be re-enabled.
842 	 */
843 	val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
844 	cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
845 	val &= ~FLOW_CONTROL_ENABLE_BIT;
846 	mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
847 
848 	/* Disable Flow control for all RXQs */
849 	for (q = 0; q < port->nrxqs; q++) {
850 		/* Set threshold 0 to disable Flow control */
851 		val = 0;
852 		val |= (0 << MSS_RXQ_TRESH_STOP_OFFS);
853 		mvpp2_cm3_write(port->priv, MSS_RXQ_TRESH_REG(q, fq), val);
854 
855 		val = mvpp2_cm3_read(port->priv, MSS_RXQ_ASS_REG(q, fq));
856 
857 		val &= ~(MSS_RXQ_ASS_PORTID_MASK << MSS_RXQ_ASS_Q_BASE(q, fq));
858 
859 		val &= ~(MSS_RXQ_ASS_HOSTID_MASK << (MSS_RXQ_ASS_Q_BASE(q, fq)
860 			+ MSS_RXQ_ASS_HOSTID_OFFS));
861 
862 		mvpp2_cm3_write(port->priv, MSS_RXQ_ASS_REG(q, fq), val);
863 	}
864 
865 	/* Notify Firmware that Flow control config space ready for update */
866 	val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
867 	val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
868 	val |= cm3_state;
869 	mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
870 
871 	spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
872 }
873 
874 /* Routine disable/enable flow control for BM pool condition */
875 static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port,
876 				    struct mvpp2_bm_pool *pool,
877 				    bool en)
878 {
879 	int val, cm3_state;
880 	unsigned long flags;
881 
882 	spin_lock_irqsave(&port->priv->mss_spinlock, flags);
883 
884 	/* Remove Flow control enable bit to prevent race between FW and Kernel
885 	 * If Flow control were enabled, it would be re-enabled.
886 	 */
887 	val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
888 	cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
889 	val &= ~FLOW_CONTROL_ENABLE_BIT;
890 	mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
891 
892 	/* Check if BM pool should be enabled/disable */
893 	if (en) {
894 		/* Set BM pool start and stop thresholds per port */
895 		val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id));
896 		val |= MSS_BUF_POOL_PORT_OFFS(port->id);
897 		val &= ~MSS_BUF_POOL_START_MASK;
898 		val |= (MSS_THRESHOLD_START << MSS_BUF_POOL_START_OFFS);
899 		val &= ~MSS_BUF_POOL_STOP_MASK;
900 		val |= MSS_THRESHOLD_STOP;
901 		mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val);
902 	} else {
903 		/* Remove BM pool from the port */
904 		val = mvpp2_cm3_read(port->priv, MSS_BUF_POOL_REG(pool->id));
905 		val &= ~MSS_BUF_POOL_PORT_OFFS(port->id);
906 
907 		/* Zero BM pool start and stop thresholds to disable pool
908 		 * flow control if pool empty (not used by any port)
909 		 */
910 		if (!pool->buf_num) {
911 			val &= ~MSS_BUF_POOL_START_MASK;
912 			val &= ~MSS_BUF_POOL_STOP_MASK;
913 		}
914 
915 		mvpp2_cm3_write(port->priv, MSS_BUF_POOL_REG(pool->id), val);
916 	}
917 
918 	/* Notify Firmware that Flow control config space ready for update */
919 	val = mvpp2_cm3_read(port->priv, MSS_FC_COM_REG);
920 	val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
921 	val |= cm3_state;
922 	mvpp2_cm3_write(port->priv, MSS_FC_COM_REG, val);
923 
924 	spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
925 }
926 
927 /* disable/enable flow control for BM pool on all ports */
928 static void mvpp2_bm_pool_update_priv_fc(struct mvpp2 *priv, bool en)
929 {
930 	struct mvpp2_port *port;
931 	int i;
932 
933 	for (i = 0; i < priv->port_count; i++) {
934 		port = priv->port_list[i];
935 		if (port->priv->percpu_pools) {
936 			for (i = 0; i < port->nrxqs; i++)
937 				mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i],
938 							port->tx_fc & en);
939 		} else {
940 			mvpp2_bm_pool_update_fc(port, port->pool_long, port->tx_fc & en);
941 			mvpp2_bm_pool_update_fc(port, port->pool_short, port->tx_fc & en);
942 		}
943 	}
944 }
945 
946 static int mvpp2_enable_global_fc(struct mvpp2 *priv)
947 {
948 	int val, timeout = 0;
949 
950 	/* Enable global flow control. In this stage global
951 	 * flow control enabled, but still disabled per port.
952 	 */
953 	val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
954 	val |= FLOW_CONTROL_ENABLE_BIT;
955 	mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
956 
957 	/* Check if Firmware running and disable FC if not*/
958 	val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
959 	mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
960 
961 	while (timeout < MSS_FC_MAX_TIMEOUT) {
962 		val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
963 
964 		if (!(val & FLOW_CONTROL_UPDATE_COMMAND_BIT))
965 			return 0;
966 		usleep_range(10, 20);
967 		timeout++;
968 	}
969 
970 	priv->global_tx_fc = false;
971 	return -EOPNOTSUPP;
972 }
973 
974 /* Release buffer to BM */
975 static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
976 				     dma_addr_t buf_dma_addr,
977 				     phys_addr_t buf_phys_addr)
978 {
979 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
980 	unsigned long flags = 0;
981 
982 	if (test_bit(thread, &port->priv->lock_map))
983 		spin_lock_irqsave(&port->bm_lock[thread], flags);
984 
985 	if (port->priv->hw_version >= MVPP22) {
986 		u32 val = 0;
987 
988 		if (sizeof(dma_addr_t) == 8)
989 			val |= upper_32_bits(buf_dma_addr) &
990 				MVPP22_BM_ADDR_HIGH_PHYS_RLS_MASK;
991 
992 		if (sizeof(phys_addr_t) == 8)
993 			val |= (upper_32_bits(buf_phys_addr)
994 				<< MVPP22_BM_ADDR_HIGH_VIRT_RLS_SHIFT) &
995 				MVPP22_BM_ADDR_HIGH_VIRT_RLS_MASK;
996 
997 		mvpp2_thread_write_relaxed(port->priv, thread,
998 					   MVPP22_BM_ADDR_HIGH_RLS_REG, val);
999 	}
1000 
1001 	/* MVPP2_BM_VIRT_RLS_REG is not interpreted by HW, and simply
1002 	 * returned in the "cookie" field of the RX
1003 	 * descriptor. Instead of storing the virtual address, we
1004 	 * store the physical address
1005 	 */
1006 	mvpp2_thread_write_relaxed(port->priv, thread,
1007 				   MVPP2_BM_VIRT_RLS_REG, buf_phys_addr);
1008 	mvpp2_thread_write_relaxed(port->priv, thread,
1009 				   MVPP2_BM_PHY_RLS_REG(pool), buf_dma_addr);
1010 
1011 	if (test_bit(thread, &port->priv->lock_map))
1012 		spin_unlock_irqrestore(&port->bm_lock[thread], flags);
1013 
1014 	put_cpu();
1015 }
1016 
1017 /* Allocate buffers for the pool */
1018 static int mvpp2_bm_bufs_add(struct mvpp2_port *port,
1019 			     struct mvpp2_bm_pool *bm_pool, int buf_num)
1020 {
1021 	int i, buf_size, total_size;
1022 	dma_addr_t dma_addr;
1023 	phys_addr_t phys_addr;
1024 	struct page_pool *pp = NULL;
1025 	void *buf;
1026 
1027 	if (port->priv->percpu_pools &&
1028 	    bm_pool->pkt_size > MVPP2_BM_LONG_PKT_SIZE) {
1029 		netdev_err(port->dev,
1030 			   "attempted to use jumbo frames with per-cpu pools");
1031 		return 0;
1032 	}
1033 
1034 	buf_size = MVPP2_RX_BUF_SIZE(bm_pool->pkt_size);
1035 	total_size = MVPP2_RX_TOTAL_SIZE(buf_size);
1036 
1037 	if (buf_num < 0 ||
1038 	    (buf_num + bm_pool->buf_num > bm_pool->size)) {
1039 		netdev_err(port->dev,
1040 			   "cannot allocate %d buffers for pool %d\n",
1041 			   buf_num, bm_pool->id);
1042 		return 0;
1043 	}
1044 
1045 	if (port->priv->percpu_pools)
1046 		pp = port->priv->page_pool[bm_pool->id];
1047 	for (i = 0; i < buf_num; i++) {
1048 		buf = mvpp2_buf_alloc(port, bm_pool, pp, &dma_addr,
1049 				      &phys_addr, GFP_KERNEL);
1050 		if (!buf)
1051 			break;
1052 
1053 		mvpp2_bm_pool_put(port, bm_pool->id, dma_addr,
1054 				  phys_addr);
1055 	}
1056 
1057 	/* Update BM driver with number of buffers added to pool */
1058 	bm_pool->buf_num += i;
1059 
1060 	netdev_dbg(port->dev,
1061 		   "pool %d: pkt_size=%4d, buf_size=%4d, total_size=%4d\n",
1062 		   bm_pool->id, bm_pool->pkt_size, buf_size, total_size);
1063 
1064 	netdev_dbg(port->dev,
1065 		   "pool %d: %d of %d buffers added\n",
1066 		   bm_pool->id, i, buf_num);
1067 	return i;
1068 }
1069 
1070 /* Notify the driver that BM pool is being used as specific type and return the
1071  * pool pointer on success
1072  */
1073 static struct mvpp2_bm_pool *
1074 mvpp2_bm_pool_use(struct mvpp2_port *port, unsigned pool, int pkt_size)
1075 {
1076 	struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool];
1077 	int num;
1078 
1079 	if ((port->priv->percpu_pools && pool > mvpp2_get_nrxqs(port->priv) * 2) ||
1080 	    (!port->priv->percpu_pools && pool >= MVPP2_BM_POOLS_NUM)) {
1081 		netdev_err(port->dev, "Invalid pool %d\n", pool);
1082 		return NULL;
1083 	}
1084 
1085 	/* Allocate buffers in case BM pool is used as long pool, but packet
1086 	 * size doesn't match MTU or BM pool hasn't being used yet
1087 	 */
1088 	if (new_pool->pkt_size == 0) {
1089 		int pkts_num;
1090 
1091 		/* Set default buffer number or free all the buffers in case
1092 		 * the pool is not empty
1093 		 */
1094 		pkts_num = new_pool->buf_num;
1095 		if (pkts_num == 0) {
1096 			if (port->priv->percpu_pools) {
1097 				if (pool < port->nrxqs)
1098 					pkts_num = mvpp2_pools[MVPP2_BM_SHORT].buf_num;
1099 				else
1100 					pkts_num = mvpp2_pools[MVPP2_BM_LONG].buf_num;
1101 			} else {
1102 				pkts_num = mvpp2_pools[pool].buf_num;
1103 			}
1104 		} else {
1105 			mvpp2_bm_bufs_free(port->dev->dev.parent,
1106 					   port->priv, new_pool, pkts_num);
1107 		}
1108 
1109 		new_pool->pkt_size = pkt_size;
1110 		new_pool->frag_size =
1111 			SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) +
1112 			MVPP2_SKB_SHINFO_SIZE;
1113 
1114 		/* Allocate buffers for this pool */
1115 		num = mvpp2_bm_bufs_add(port, new_pool, pkts_num);
1116 		if (num != pkts_num) {
1117 			WARN(1, "pool %d: %d of %d allocated\n",
1118 			     new_pool->id, num, pkts_num);
1119 			return NULL;
1120 		}
1121 	}
1122 
1123 	mvpp2_bm_pool_bufsize_set(port->priv, new_pool,
1124 				  MVPP2_RX_BUF_SIZE(new_pool->pkt_size));
1125 
1126 	return new_pool;
1127 }
1128 
1129 static struct mvpp2_bm_pool *
1130 mvpp2_bm_pool_use_percpu(struct mvpp2_port *port, int type,
1131 			 unsigned int pool, int pkt_size)
1132 {
1133 	struct mvpp2_bm_pool *new_pool = &port->priv->bm_pools[pool];
1134 	int num;
1135 
1136 	if (pool > port->nrxqs * 2) {
1137 		netdev_err(port->dev, "Invalid pool %d\n", pool);
1138 		return NULL;
1139 	}
1140 
1141 	/* Allocate buffers in case BM pool is used as long pool, but packet
1142 	 * size doesn't match MTU or BM pool hasn't being used yet
1143 	 */
1144 	if (new_pool->pkt_size == 0) {
1145 		int pkts_num;
1146 
1147 		/* Set default buffer number or free all the buffers in case
1148 		 * the pool is not empty
1149 		 */
1150 		pkts_num = new_pool->buf_num;
1151 		if (pkts_num == 0)
1152 			pkts_num = mvpp2_pools[type].buf_num;
1153 		else
1154 			mvpp2_bm_bufs_free(port->dev->dev.parent,
1155 					   port->priv, new_pool, pkts_num);
1156 
1157 		new_pool->pkt_size = pkt_size;
1158 		new_pool->frag_size =
1159 			SKB_DATA_ALIGN(MVPP2_RX_BUF_SIZE(pkt_size)) +
1160 			MVPP2_SKB_SHINFO_SIZE;
1161 
1162 		/* Allocate buffers for this pool */
1163 		num = mvpp2_bm_bufs_add(port, new_pool, pkts_num);
1164 		if (num != pkts_num) {
1165 			WARN(1, "pool %d: %d of %d allocated\n",
1166 			     new_pool->id, num, pkts_num);
1167 			return NULL;
1168 		}
1169 	}
1170 
1171 	mvpp2_bm_pool_bufsize_set(port->priv, new_pool,
1172 				  MVPP2_RX_BUF_SIZE(new_pool->pkt_size));
1173 
1174 	return new_pool;
1175 }
1176 
1177 /* Initialize pools for swf, shared buffers variant */
1178 static int mvpp2_swf_bm_pool_init_shared(struct mvpp2_port *port)
1179 {
1180 	enum mvpp2_bm_pool_log_num long_log_pool, short_log_pool;
1181 	int rxq;
1182 
1183 	/* If port pkt_size is higher than 1518B:
1184 	 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool
1185 	 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool
1186 	 */
1187 	if (port->pkt_size > MVPP2_BM_LONG_PKT_SIZE) {
1188 		long_log_pool = MVPP2_BM_JUMBO;
1189 		short_log_pool = MVPP2_BM_LONG;
1190 	} else {
1191 		long_log_pool = MVPP2_BM_LONG;
1192 		short_log_pool = MVPP2_BM_SHORT;
1193 	}
1194 
1195 	if (!port->pool_long) {
1196 		port->pool_long =
1197 			mvpp2_bm_pool_use(port, long_log_pool,
1198 					  mvpp2_pools[long_log_pool].pkt_size);
1199 		if (!port->pool_long)
1200 			return -ENOMEM;
1201 
1202 		port->pool_long->port_map |= BIT(port->id);
1203 
1204 		for (rxq = 0; rxq < port->nrxqs; rxq++)
1205 			mvpp2_rxq_long_pool_set(port, rxq, port->pool_long->id);
1206 	}
1207 
1208 	if (!port->pool_short) {
1209 		port->pool_short =
1210 			mvpp2_bm_pool_use(port, short_log_pool,
1211 					  mvpp2_pools[short_log_pool].pkt_size);
1212 		if (!port->pool_short)
1213 			return -ENOMEM;
1214 
1215 		port->pool_short->port_map |= BIT(port->id);
1216 
1217 		for (rxq = 0; rxq < port->nrxqs; rxq++)
1218 			mvpp2_rxq_short_pool_set(port, rxq,
1219 						 port->pool_short->id);
1220 	}
1221 
1222 	return 0;
1223 }
1224 
1225 /* Initialize pools for swf, percpu buffers variant */
1226 static int mvpp2_swf_bm_pool_init_percpu(struct mvpp2_port *port)
1227 {
1228 	struct mvpp2_bm_pool *bm_pool;
1229 	int i;
1230 
1231 	for (i = 0; i < port->nrxqs; i++) {
1232 		bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_SHORT, i,
1233 						   mvpp2_pools[MVPP2_BM_SHORT].pkt_size);
1234 		if (!bm_pool)
1235 			return -ENOMEM;
1236 
1237 		bm_pool->port_map |= BIT(port->id);
1238 		mvpp2_rxq_short_pool_set(port, i, bm_pool->id);
1239 	}
1240 
1241 	for (i = 0; i < port->nrxqs; i++) {
1242 		bm_pool = mvpp2_bm_pool_use_percpu(port, MVPP2_BM_LONG, i + port->nrxqs,
1243 						   mvpp2_pools[MVPP2_BM_LONG].pkt_size);
1244 		if (!bm_pool)
1245 			return -ENOMEM;
1246 
1247 		bm_pool->port_map |= BIT(port->id);
1248 		mvpp2_rxq_long_pool_set(port, i, bm_pool->id);
1249 	}
1250 
1251 	port->pool_long = NULL;
1252 	port->pool_short = NULL;
1253 
1254 	return 0;
1255 }
1256 
1257 static int mvpp2_swf_bm_pool_init(struct mvpp2_port *port)
1258 {
1259 	if (port->priv->percpu_pools)
1260 		return mvpp2_swf_bm_pool_init_percpu(port);
1261 	else
1262 		return mvpp2_swf_bm_pool_init_shared(port);
1263 }
1264 
1265 static void mvpp2_set_hw_csum(struct mvpp2_port *port,
1266 			      enum mvpp2_bm_pool_log_num new_long_pool)
1267 {
1268 	const netdev_features_t csums = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1269 
1270 	/* Update L4 checksum when jumbo enable/disable on port.
1271 	 * Only port 0 supports hardware checksum offload due to
1272 	 * the Tx FIFO size limitation.
1273 	 * Also, don't set NETIF_F_HW_CSUM because L3_offset in TX descriptor
1274 	 * has 7 bits, so the maximum L3 offset is 128.
1275 	 */
1276 	if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) {
1277 		port->dev->features &= ~csums;
1278 		port->dev->hw_features &= ~csums;
1279 	} else {
1280 		port->dev->features |= csums;
1281 		port->dev->hw_features |= csums;
1282 	}
1283 }
1284 
1285 static int mvpp2_bm_update_mtu(struct net_device *dev, int mtu)
1286 {
1287 	struct mvpp2_port *port = netdev_priv(dev);
1288 	enum mvpp2_bm_pool_log_num new_long_pool;
1289 	int pkt_size = MVPP2_RX_PKT_SIZE(mtu);
1290 
1291 	if (port->priv->percpu_pools)
1292 		goto out_set;
1293 
1294 	/* If port MTU is higher than 1518B:
1295 	 * HW Long pool - SW Jumbo pool, HW Short pool - SW Long pool
1296 	 * else: HW Long pool - SW Long pool, HW Short pool - SW Short pool
1297 	 */
1298 	if (pkt_size > MVPP2_BM_LONG_PKT_SIZE)
1299 		new_long_pool = MVPP2_BM_JUMBO;
1300 	else
1301 		new_long_pool = MVPP2_BM_LONG;
1302 
1303 	if (new_long_pool != port->pool_long->id) {
1304 		if (port->tx_fc) {
1305 			if (pkt_size > MVPP2_BM_LONG_PKT_SIZE)
1306 				mvpp2_bm_pool_update_fc(port,
1307 							port->pool_short,
1308 							false);
1309 			else
1310 				mvpp2_bm_pool_update_fc(port, port->pool_long,
1311 							false);
1312 		}
1313 
1314 		/* Remove port from old short & long pool */
1315 		port->pool_long = mvpp2_bm_pool_use(port, port->pool_long->id,
1316 						    port->pool_long->pkt_size);
1317 		port->pool_long->port_map &= ~BIT(port->id);
1318 		port->pool_long = NULL;
1319 
1320 		port->pool_short = mvpp2_bm_pool_use(port, port->pool_short->id,
1321 						     port->pool_short->pkt_size);
1322 		port->pool_short->port_map &= ~BIT(port->id);
1323 		port->pool_short = NULL;
1324 
1325 		port->pkt_size =  pkt_size;
1326 
1327 		/* Add port to new short & long pool */
1328 		mvpp2_swf_bm_pool_init(port);
1329 
1330 		mvpp2_set_hw_csum(port, new_long_pool);
1331 
1332 		if (port->tx_fc) {
1333 			if (pkt_size > MVPP2_BM_LONG_PKT_SIZE)
1334 				mvpp2_bm_pool_update_fc(port, port->pool_long,
1335 							true);
1336 			else
1337 				mvpp2_bm_pool_update_fc(port, port->pool_short,
1338 							true);
1339 		}
1340 
1341 		/* Update L4 checksum when jumbo enable/disable on port */
1342 		if (new_long_pool == MVPP2_BM_JUMBO && port->id != 0) {
1343 			dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
1344 			dev->hw_features &= ~(NETIF_F_IP_CSUM |
1345 					      NETIF_F_IPV6_CSUM);
1346 		} else {
1347 			dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1348 			dev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1349 		}
1350 	}
1351 
1352 out_set:
1353 	dev->mtu = mtu;
1354 	dev->wanted_features = dev->features;
1355 
1356 	netdev_update_features(dev);
1357 	return 0;
1358 }
1359 
1360 static inline void mvpp2_interrupts_enable(struct mvpp2_port *port)
1361 {
1362 	int i, sw_thread_mask = 0;
1363 
1364 	for (i = 0; i < port->nqvecs; i++)
1365 		sw_thread_mask |= port->qvecs[i].sw_thread_mask;
1366 
1367 	mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
1368 		    MVPP2_ISR_ENABLE_INTERRUPT(sw_thread_mask));
1369 }
1370 
1371 static inline void mvpp2_interrupts_disable(struct mvpp2_port *port)
1372 {
1373 	int i, sw_thread_mask = 0;
1374 
1375 	for (i = 0; i < port->nqvecs; i++)
1376 		sw_thread_mask |= port->qvecs[i].sw_thread_mask;
1377 
1378 	mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
1379 		    MVPP2_ISR_DISABLE_INTERRUPT(sw_thread_mask));
1380 }
1381 
1382 static inline void mvpp2_qvec_interrupt_enable(struct mvpp2_queue_vector *qvec)
1383 {
1384 	struct mvpp2_port *port = qvec->port;
1385 
1386 	mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
1387 		    MVPP2_ISR_ENABLE_INTERRUPT(qvec->sw_thread_mask));
1388 }
1389 
1390 static inline void mvpp2_qvec_interrupt_disable(struct mvpp2_queue_vector *qvec)
1391 {
1392 	struct mvpp2_port *port = qvec->port;
1393 
1394 	mvpp2_write(port->priv, MVPP2_ISR_ENABLE_REG(port->id),
1395 		    MVPP2_ISR_DISABLE_INTERRUPT(qvec->sw_thread_mask));
1396 }
1397 
1398 /* Mask the current thread's Rx/Tx interrupts
1399  * Called by on_each_cpu(), guaranteed to run with migration disabled,
1400  * using smp_processor_id() is OK.
1401  */
1402 static void mvpp2_interrupts_mask(void *arg)
1403 {
1404 	struct mvpp2_port *port = arg;
1405 	int cpu = smp_processor_id();
1406 	u32 thread;
1407 
1408 	/* If the thread isn't used, don't do anything */
1409 	if (cpu > port->priv->nthreads)
1410 		return;
1411 
1412 	thread = mvpp2_cpu_to_thread(port->priv, cpu);
1413 
1414 	mvpp2_thread_write(port->priv, thread,
1415 			   MVPP2_ISR_RX_TX_MASK_REG(port->id), 0);
1416 	mvpp2_thread_write(port->priv, thread,
1417 			   MVPP2_ISR_RX_ERR_CAUSE_REG(port->id), 0);
1418 }
1419 
1420 /* Unmask the current thread's Rx/Tx interrupts.
1421  * Called by on_each_cpu(), guaranteed to run with migration disabled,
1422  * using smp_processor_id() is OK.
1423  */
1424 static void mvpp2_interrupts_unmask(void *arg)
1425 {
1426 	struct mvpp2_port *port = arg;
1427 	int cpu = smp_processor_id();
1428 	u32 val, thread;
1429 
1430 	/* If the thread isn't used, don't do anything */
1431 	if (cpu >= port->priv->nthreads)
1432 		return;
1433 
1434 	thread = mvpp2_cpu_to_thread(port->priv, cpu);
1435 
1436 	val = MVPP2_CAUSE_MISC_SUM_MASK |
1437 		MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version);
1438 	if (port->has_tx_irqs)
1439 		val |= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;
1440 
1441 	mvpp2_thread_write(port->priv, thread,
1442 			   MVPP2_ISR_RX_TX_MASK_REG(port->id), val);
1443 	mvpp2_thread_write(port->priv, thread,
1444 			   MVPP2_ISR_RX_ERR_CAUSE_REG(port->id),
1445 			   MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK);
1446 }
1447 
1448 static void
1449 mvpp2_shared_interrupt_mask_unmask(struct mvpp2_port *port, bool mask)
1450 {
1451 	u32 val;
1452 	int i;
1453 
1454 	if (port->priv->hw_version == MVPP21)
1455 		return;
1456 
1457 	if (mask)
1458 		val = 0;
1459 	else
1460 		val = MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(MVPP22);
1461 
1462 	for (i = 0; i < port->nqvecs; i++) {
1463 		struct mvpp2_queue_vector *v = port->qvecs + i;
1464 
1465 		if (v->type != MVPP2_QUEUE_VECTOR_SHARED)
1466 			continue;
1467 
1468 		mvpp2_thread_write(port->priv, v->sw_thread_id,
1469 				   MVPP2_ISR_RX_TX_MASK_REG(port->id), val);
1470 		mvpp2_thread_write(port->priv, v->sw_thread_id,
1471 				   MVPP2_ISR_RX_ERR_CAUSE_REG(port->id),
1472 				   MVPP2_ISR_RX_ERR_CAUSE_NONOCC_MASK);
1473 	}
1474 }
1475 
1476 /* Only GOP port 0 has an XLG MAC */
1477 static bool mvpp2_port_supports_xlg(struct mvpp2_port *port)
1478 {
1479 	return port->gop_id == 0;
1480 }
1481 
1482 static bool mvpp2_port_supports_rgmii(struct mvpp2_port *port)
1483 {
1484 	return !(port->priv->hw_version >= MVPP22 && port->gop_id == 0);
1485 }
1486 
1487 /* Port configuration routines */
1488 static bool mvpp2_is_xlg(phy_interface_t interface)
1489 {
1490 	return interface == PHY_INTERFACE_MODE_10GBASER ||
1491 	       interface == PHY_INTERFACE_MODE_5GBASER ||
1492 	       interface == PHY_INTERFACE_MODE_XAUI;
1493 }
1494 
1495 static void mvpp2_modify(void __iomem *ptr, u32 mask, u32 set)
1496 {
1497 	u32 old, val;
1498 
1499 	old = val = readl(ptr);
1500 	val &= ~mask;
1501 	val |= set;
1502 	if (old != val)
1503 		writel(val, ptr);
1504 }
1505 
1506 static void mvpp22_gop_init_rgmii(struct mvpp2_port *port)
1507 {
1508 	struct mvpp2 *priv = port->priv;
1509 	u32 val;
1510 
1511 	regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val);
1512 	val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT;
1513 	regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);
1514 
1515 	regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val);
1516 	if (port->gop_id == 2)
1517 		val |= GENCONF_CTRL0_PORT2_RGMII;
1518 	else if (port->gop_id == 3)
1519 		val |= GENCONF_CTRL0_PORT3_RGMII_MII;
1520 	regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val);
1521 }
1522 
1523 static void mvpp22_gop_init_sgmii(struct mvpp2_port *port)
1524 {
1525 	struct mvpp2 *priv = port->priv;
1526 	u32 val;
1527 
1528 	regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val);
1529 	val |= GENCONF_PORT_CTRL0_BUS_WIDTH_SELECT |
1530 	       GENCONF_PORT_CTRL0_RX_DATA_SAMPLE;
1531 	regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);
1532 
1533 	if (port->gop_id > 1) {
1534 		regmap_read(priv->sysctrl_base, GENCONF_CTRL0, &val);
1535 		if (port->gop_id == 2)
1536 			val &= ~GENCONF_CTRL0_PORT2_RGMII;
1537 		else if (port->gop_id == 3)
1538 			val &= ~GENCONF_CTRL0_PORT3_RGMII_MII;
1539 		regmap_write(priv->sysctrl_base, GENCONF_CTRL0, val);
1540 	}
1541 }
1542 
1543 static void mvpp22_gop_init_10gkr(struct mvpp2_port *port)
1544 {
1545 	struct mvpp2 *priv = port->priv;
1546 	void __iomem *mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id);
1547 	void __iomem *xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id);
1548 	u32 val;
1549 
1550 	val = readl(xpcs + MVPP22_XPCS_CFG0);
1551 	val &= ~(MVPP22_XPCS_CFG0_PCS_MODE(0x3) |
1552 		 MVPP22_XPCS_CFG0_ACTIVE_LANE(0x3));
1553 	val |= MVPP22_XPCS_CFG0_ACTIVE_LANE(2);
1554 	writel(val, xpcs + MVPP22_XPCS_CFG0);
1555 
1556 	val = readl(mpcs + MVPP22_MPCS_CTRL);
1557 	val &= ~MVPP22_MPCS_CTRL_FWD_ERR_CONN;
1558 	writel(val, mpcs + MVPP22_MPCS_CTRL);
1559 
1560 	val = readl(mpcs + MVPP22_MPCS_CLK_RESET);
1561 	val &= ~MVPP22_MPCS_CLK_RESET_DIV_RATIO(0x7);
1562 	val |= MVPP22_MPCS_CLK_RESET_DIV_RATIO(1);
1563 	writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
1564 }
1565 
1566 static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en)
1567 {
1568 	struct mvpp2 *priv = port->priv;
1569 	void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
1570 	u32 val;
1571 
1572 	val = readl(fca + MVPP22_FCA_CONTROL_REG);
1573 	val &= ~MVPP22_FCA_ENABLE_PERIODIC;
1574 	if (en)
1575 		val |= MVPP22_FCA_ENABLE_PERIODIC;
1576 	writel(val, fca + MVPP22_FCA_CONTROL_REG);
1577 }
1578 
1579 static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer)
1580 {
1581 	struct mvpp2 *priv = port->priv;
1582 	void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
1583 	u32 lsb, msb;
1584 
1585 	lsb = timer & MVPP22_FCA_REG_MASK;
1586 	msb = timer >> MVPP22_FCA_REG_SIZE;
1587 
1588 	writel(lsb, fca + MVPP22_PERIODIC_COUNTER_LSB_REG);
1589 	writel(msb, fca + MVPP22_PERIODIC_COUNTER_MSB_REG);
1590 }
1591 
1592 /* Set Flow Control timer x100 faster than pause quanta to ensure that link
1593  * partner won't send traffic if port is in XOFF mode.
1594  */
1595 static void mvpp22_gop_fca_set_periodic_timer(struct mvpp2_port *port)
1596 {
1597 	u32 timer;
1598 
1599 	timer = (port->priv->tclk / (USEC_PER_SEC * FC_CLK_DIVIDER))
1600 		* FC_QUANTA;
1601 
1602 	mvpp22_gop_fca_enable_periodic(port, false);
1603 
1604 	mvpp22_gop_fca_set_timer(port, timer);
1605 
1606 	mvpp22_gop_fca_enable_periodic(port, true);
1607 }
1608 
1609 static int mvpp22_gop_init(struct mvpp2_port *port, phy_interface_t interface)
1610 {
1611 	struct mvpp2 *priv = port->priv;
1612 	u32 val;
1613 
1614 	if (!priv->sysctrl_base)
1615 		return 0;
1616 
1617 	switch (interface) {
1618 	case PHY_INTERFACE_MODE_RGMII:
1619 	case PHY_INTERFACE_MODE_RGMII_ID:
1620 	case PHY_INTERFACE_MODE_RGMII_RXID:
1621 	case PHY_INTERFACE_MODE_RGMII_TXID:
1622 		if (!mvpp2_port_supports_rgmii(port))
1623 			goto invalid_conf;
1624 		mvpp22_gop_init_rgmii(port);
1625 		break;
1626 	case PHY_INTERFACE_MODE_SGMII:
1627 	case PHY_INTERFACE_MODE_1000BASEX:
1628 	case PHY_INTERFACE_MODE_2500BASEX:
1629 		mvpp22_gop_init_sgmii(port);
1630 		break;
1631 	case PHY_INTERFACE_MODE_5GBASER:
1632 	case PHY_INTERFACE_MODE_10GBASER:
1633 		if (!mvpp2_port_supports_xlg(port))
1634 			goto invalid_conf;
1635 		mvpp22_gop_init_10gkr(port);
1636 		break;
1637 	default:
1638 		goto unsupported_conf;
1639 	}
1640 
1641 	regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL1, &val);
1642 	val |= GENCONF_PORT_CTRL1_RESET(port->gop_id) |
1643 	       GENCONF_PORT_CTRL1_EN(port->gop_id);
1644 	regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL1, val);
1645 
1646 	regmap_read(priv->sysctrl_base, GENCONF_PORT_CTRL0, &val);
1647 	val |= GENCONF_PORT_CTRL0_CLK_DIV_PHASE_CLR;
1648 	regmap_write(priv->sysctrl_base, GENCONF_PORT_CTRL0, val);
1649 
1650 	regmap_read(priv->sysctrl_base, GENCONF_SOFT_RESET1, &val);
1651 	val |= GENCONF_SOFT_RESET1_GOP;
1652 	regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val);
1653 
1654 	mvpp22_gop_fca_set_periodic_timer(port);
1655 
1656 unsupported_conf:
1657 	return 0;
1658 
1659 invalid_conf:
1660 	netdev_err(port->dev, "Invalid port configuration\n");
1661 	return -EINVAL;
1662 }
1663 
1664 static void mvpp22_gop_unmask_irq(struct mvpp2_port *port)
1665 {
1666 	u32 val;
1667 
1668 	if (phy_interface_mode_is_rgmii(port->phy_interface) ||
1669 	    phy_interface_mode_is_8023z(port->phy_interface) ||
1670 	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
1671 		/* Enable the GMAC link status irq for this port */
1672 		val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK);
1673 		val |= MVPP22_GMAC_INT_SUM_MASK_LINK_STAT;
1674 		writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK);
1675 	}
1676 
1677 	if (mvpp2_port_supports_xlg(port)) {
1678 		/* Enable the XLG/GIG irqs for this port */
1679 		val = readl(port->base + MVPP22_XLG_EXT_INT_MASK);
1680 		if (mvpp2_is_xlg(port->phy_interface))
1681 			val |= MVPP22_XLG_EXT_INT_MASK_XLG;
1682 		else
1683 			val |= MVPP22_XLG_EXT_INT_MASK_GIG;
1684 		writel(val, port->base + MVPP22_XLG_EXT_INT_MASK);
1685 	}
1686 }
1687 
1688 static void mvpp22_gop_mask_irq(struct mvpp2_port *port)
1689 {
1690 	u32 val;
1691 
1692 	if (mvpp2_port_supports_xlg(port)) {
1693 		val = readl(port->base + MVPP22_XLG_EXT_INT_MASK);
1694 		val &= ~(MVPP22_XLG_EXT_INT_MASK_XLG |
1695 			 MVPP22_XLG_EXT_INT_MASK_GIG);
1696 		writel(val, port->base + MVPP22_XLG_EXT_INT_MASK);
1697 	}
1698 
1699 	if (phy_interface_mode_is_rgmii(port->phy_interface) ||
1700 	    phy_interface_mode_is_8023z(port->phy_interface) ||
1701 	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
1702 		val = readl(port->base + MVPP22_GMAC_INT_SUM_MASK);
1703 		val &= ~MVPP22_GMAC_INT_SUM_MASK_LINK_STAT;
1704 		writel(val, port->base + MVPP22_GMAC_INT_SUM_MASK);
1705 	}
1706 }
1707 
1708 static void mvpp22_gop_setup_irq(struct mvpp2_port *port)
1709 {
1710 	u32 val;
1711 
1712 	mvpp2_modify(port->base + MVPP22_GMAC_INT_SUM_MASK,
1713 		     MVPP22_GMAC_INT_SUM_MASK_PTP,
1714 		     MVPP22_GMAC_INT_SUM_MASK_PTP);
1715 
1716 	if (port->phylink ||
1717 	    phy_interface_mode_is_rgmii(port->phy_interface) ||
1718 	    phy_interface_mode_is_8023z(port->phy_interface) ||
1719 	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
1720 		val = readl(port->base + MVPP22_GMAC_INT_MASK);
1721 		val |= MVPP22_GMAC_INT_MASK_LINK_STAT;
1722 		writel(val, port->base + MVPP22_GMAC_INT_MASK);
1723 	}
1724 
1725 	if (mvpp2_port_supports_xlg(port)) {
1726 		val = readl(port->base + MVPP22_XLG_INT_MASK);
1727 		val |= MVPP22_XLG_INT_MASK_LINK;
1728 		writel(val, port->base + MVPP22_XLG_INT_MASK);
1729 
1730 		mvpp2_modify(port->base + MVPP22_XLG_EXT_INT_MASK,
1731 			     MVPP22_XLG_EXT_INT_MASK_PTP,
1732 			     MVPP22_XLG_EXT_INT_MASK_PTP);
1733 	}
1734 
1735 	mvpp22_gop_unmask_irq(port);
1736 }
1737 
1738 /* Sets the PHY mode of the COMPHY (which configures the serdes lanes).
1739  *
1740  * The PHY mode used by the PPv2 driver comes from the network subsystem, while
1741  * the one given to the COMPHY comes from the generic PHY subsystem. Hence they
1742  * differ.
1743  *
1744  * The COMPHY configures the serdes lanes regardless of the actual use of the
1745  * lanes by the physical layer. This is why configurations like
1746  * "PPv2 (2500BaseX) - COMPHY (2500SGMII)" are valid.
1747  */
1748 static int mvpp22_comphy_init(struct mvpp2_port *port,
1749 			      phy_interface_t interface)
1750 {
1751 	int ret;
1752 
1753 	if (!port->comphy)
1754 		return 0;
1755 
1756 	ret = phy_set_mode_ext(port->comphy, PHY_MODE_ETHERNET, interface);
1757 	if (ret)
1758 		return ret;
1759 
1760 	return phy_power_on(port->comphy);
1761 }
1762 
1763 static void mvpp2_port_enable(struct mvpp2_port *port)
1764 {
1765 	u32 val;
1766 
1767 	if (mvpp2_port_supports_xlg(port) &&
1768 	    mvpp2_is_xlg(port->phy_interface)) {
1769 		val = readl(port->base + MVPP22_XLG_CTRL0_REG);
1770 		val |= MVPP22_XLG_CTRL0_PORT_EN;
1771 		val &= ~MVPP22_XLG_CTRL0_MIB_CNT_DIS;
1772 		writel(val, port->base + MVPP22_XLG_CTRL0_REG);
1773 	} else {
1774 		val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
1775 		val |= MVPP2_GMAC_PORT_EN_MASK;
1776 		val |= MVPP2_GMAC_MIB_CNTR_EN_MASK;
1777 		writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);
1778 	}
1779 }
1780 
1781 static void mvpp2_port_disable(struct mvpp2_port *port)
1782 {
1783 	u32 val;
1784 
1785 	if (mvpp2_port_supports_xlg(port) &&
1786 	    mvpp2_is_xlg(port->phy_interface)) {
1787 		val = readl(port->base + MVPP22_XLG_CTRL0_REG);
1788 		val &= ~MVPP22_XLG_CTRL0_PORT_EN;
1789 		writel(val, port->base + MVPP22_XLG_CTRL0_REG);
1790 	}
1791 
1792 	val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
1793 	val &= ~(MVPP2_GMAC_PORT_EN_MASK);
1794 	writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);
1795 }
1796 
1797 /* Set IEEE 802.3x Flow Control Xon Packet Transmission Mode */
1798 static void mvpp2_port_periodic_xon_disable(struct mvpp2_port *port)
1799 {
1800 	u32 val;
1801 
1802 	val = readl(port->base + MVPP2_GMAC_CTRL_1_REG) &
1803 		    ~MVPP2_GMAC_PERIODIC_XON_EN_MASK;
1804 	writel(val, port->base + MVPP2_GMAC_CTRL_1_REG);
1805 }
1806 
1807 /* Configure loopback port */
1808 static void mvpp2_port_loopback_set(struct mvpp2_port *port,
1809 				    const struct phylink_link_state *state)
1810 {
1811 	u32 val;
1812 
1813 	val = readl(port->base + MVPP2_GMAC_CTRL_1_REG);
1814 
1815 	if (state->speed == 1000)
1816 		val |= MVPP2_GMAC_GMII_LB_EN_MASK;
1817 	else
1818 		val &= ~MVPP2_GMAC_GMII_LB_EN_MASK;
1819 
1820 	if (phy_interface_mode_is_8023z(state->interface) ||
1821 	    state->interface == PHY_INTERFACE_MODE_SGMII)
1822 		val |= MVPP2_GMAC_PCS_LB_EN_MASK;
1823 	else
1824 		val &= ~MVPP2_GMAC_PCS_LB_EN_MASK;
1825 
1826 	writel(val, port->base + MVPP2_GMAC_CTRL_1_REG);
1827 }
1828 
1829 enum {
1830 	ETHTOOL_XDP_REDIRECT,
1831 	ETHTOOL_XDP_PASS,
1832 	ETHTOOL_XDP_DROP,
1833 	ETHTOOL_XDP_TX,
1834 	ETHTOOL_XDP_TX_ERR,
1835 	ETHTOOL_XDP_XMIT,
1836 	ETHTOOL_XDP_XMIT_ERR,
1837 };
1838 
1839 struct mvpp2_ethtool_counter {
1840 	unsigned int offset;
1841 	const char string[ETH_GSTRING_LEN];
1842 	bool reg_is_64b;
1843 };
1844 
1845 static u64 mvpp2_read_count(struct mvpp2_port *port,
1846 			    const struct mvpp2_ethtool_counter *counter)
1847 {
1848 	u64 val;
1849 
1850 	val = readl(port->stats_base + counter->offset);
1851 	if (counter->reg_is_64b)
1852 		val += (u64)readl(port->stats_base + counter->offset + 4) << 32;
1853 
1854 	return val;
1855 }
1856 
1857 /* Some counters are accessed indirectly by first writing an index to
1858  * MVPP2_CTRS_IDX. The index can represent various resources depending on the
1859  * register we access, it can be a hit counter for some classification tables,
1860  * a counter specific to a rxq, a txq or a buffer pool.
1861  */
1862 static u32 mvpp2_read_index(struct mvpp2 *priv, u32 index, u32 reg)
1863 {
1864 	mvpp2_write(priv, MVPP2_CTRS_IDX, index);
1865 	return mvpp2_read(priv, reg);
1866 }
1867 
1868 /* Due to the fact that software statistics and hardware statistics are, by
1869  * design, incremented at different moments in the chain of packet processing,
1870  * it is very likely that incoming packets could have been dropped after being
1871  * counted by hardware but before reaching software statistics (most probably
1872  * multicast packets), and in the opposite way, during transmission, FCS bytes
1873  * are added in between as well as TSO skb will be split and header bytes added.
1874  * Hence, statistics gathered from userspace with ifconfig (software) and
1875  * ethtool (hardware) cannot be compared.
1876  */
1877 static const struct mvpp2_ethtool_counter mvpp2_ethtool_mib_regs[] = {
1878 	{ MVPP2_MIB_GOOD_OCTETS_RCVD, "good_octets_received", true },
1879 	{ MVPP2_MIB_BAD_OCTETS_RCVD, "bad_octets_received" },
1880 	{ MVPP2_MIB_CRC_ERRORS_SENT, "crc_errors_sent" },
1881 	{ MVPP2_MIB_UNICAST_FRAMES_RCVD, "unicast_frames_received" },
1882 	{ MVPP2_MIB_BROADCAST_FRAMES_RCVD, "broadcast_frames_received" },
1883 	{ MVPP2_MIB_MULTICAST_FRAMES_RCVD, "multicast_frames_received" },
1884 	{ MVPP2_MIB_FRAMES_64_OCTETS, "frames_64_octets" },
1885 	{ MVPP2_MIB_FRAMES_65_TO_127_OCTETS, "frames_65_to_127_octet" },
1886 	{ MVPP2_MIB_FRAMES_128_TO_255_OCTETS, "frames_128_to_255_octet" },
1887 	{ MVPP2_MIB_FRAMES_256_TO_511_OCTETS, "frames_256_to_511_octet" },
1888 	{ MVPP2_MIB_FRAMES_512_TO_1023_OCTETS, "frames_512_to_1023_octet" },
1889 	{ MVPP2_MIB_FRAMES_1024_TO_MAX_OCTETS, "frames_1024_to_max_octet" },
1890 	{ MVPP2_MIB_GOOD_OCTETS_SENT, "good_octets_sent", true },
1891 	{ MVPP2_MIB_UNICAST_FRAMES_SENT, "unicast_frames_sent" },
1892 	{ MVPP2_MIB_MULTICAST_FRAMES_SENT, "multicast_frames_sent" },
1893 	{ MVPP2_MIB_BROADCAST_FRAMES_SENT, "broadcast_frames_sent" },
1894 	{ MVPP2_MIB_FC_SENT, "fc_sent" },
1895 	{ MVPP2_MIB_FC_RCVD, "fc_received" },
1896 	{ MVPP2_MIB_RX_FIFO_OVERRUN, "rx_fifo_overrun" },
1897 	{ MVPP2_MIB_UNDERSIZE_RCVD, "undersize_received" },
1898 	{ MVPP2_MIB_FRAGMENTS_RCVD, "fragments_received" },
1899 	{ MVPP2_MIB_OVERSIZE_RCVD, "oversize_received" },
1900 	{ MVPP2_MIB_JABBER_RCVD, "jabber_received" },
1901 	{ MVPP2_MIB_MAC_RCV_ERROR, "mac_receive_error" },
1902 	{ MVPP2_MIB_BAD_CRC_EVENT, "bad_crc_event" },
1903 	{ MVPP2_MIB_COLLISION, "collision" },
1904 	{ MVPP2_MIB_LATE_COLLISION, "late_collision" },
1905 };
1906 
1907 static const struct mvpp2_ethtool_counter mvpp2_ethtool_port_regs[] = {
1908 	{ MVPP2_OVERRUN_ETH_DROP, "rx_fifo_or_parser_overrun_drops" },
1909 	{ MVPP2_CLS_ETH_DROP, "rx_classifier_drops" },
1910 };
1911 
1912 static const struct mvpp2_ethtool_counter mvpp2_ethtool_txq_regs[] = {
1913 	{ MVPP2_TX_DESC_ENQ_CTR, "txq_%d_desc_enqueue" },
1914 	{ MVPP2_TX_DESC_ENQ_TO_DDR_CTR, "txq_%d_desc_enqueue_to_ddr" },
1915 	{ MVPP2_TX_BUFF_ENQ_TO_DDR_CTR, "txq_%d_buff_euqueue_to_ddr" },
1916 	{ MVPP2_TX_DESC_ENQ_HW_FWD_CTR, "txq_%d_desc_hardware_forwarded" },
1917 	{ MVPP2_TX_PKTS_DEQ_CTR, "txq_%d_packets_dequeued" },
1918 	{ MVPP2_TX_PKTS_FULL_QUEUE_DROP_CTR, "txq_%d_queue_full_drops" },
1919 	{ MVPP2_TX_PKTS_EARLY_DROP_CTR, "txq_%d_packets_early_drops" },
1920 	{ MVPP2_TX_PKTS_BM_DROP_CTR, "txq_%d_packets_bm_drops" },
1921 	{ MVPP2_TX_PKTS_BM_MC_DROP_CTR, "txq_%d_packets_rep_bm_drops" },
1922 };
1923 
1924 static const struct mvpp2_ethtool_counter mvpp2_ethtool_rxq_regs[] = {
1925 	{ MVPP2_RX_DESC_ENQ_CTR, "rxq_%d_desc_enqueue" },
1926 	{ MVPP2_RX_PKTS_FULL_QUEUE_DROP_CTR, "rxq_%d_queue_full_drops" },
1927 	{ MVPP2_RX_PKTS_EARLY_DROP_CTR, "rxq_%d_packets_early_drops" },
1928 	{ MVPP2_RX_PKTS_BM_DROP_CTR, "rxq_%d_packets_bm_drops" },
1929 };
1930 
1931 static const struct mvpp2_ethtool_counter mvpp2_ethtool_xdp[] = {
1932 	{ ETHTOOL_XDP_REDIRECT, "rx_xdp_redirect", },
1933 	{ ETHTOOL_XDP_PASS, "rx_xdp_pass", },
1934 	{ ETHTOOL_XDP_DROP, "rx_xdp_drop", },
1935 	{ ETHTOOL_XDP_TX, "rx_xdp_tx", },
1936 	{ ETHTOOL_XDP_TX_ERR, "rx_xdp_tx_errors", },
1937 	{ ETHTOOL_XDP_XMIT, "tx_xdp_xmit", },
1938 	{ ETHTOOL_XDP_XMIT_ERR, "tx_xdp_xmit_errors", },
1939 };
1940 
1941 #define MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs)	(ARRAY_SIZE(mvpp2_ethtool_mib_regs) + \
1942 						 ARRAY_SIZE(mvpp2_ethtool_port_regs) + \
1943 						 (ARRAY_SIZE(mvpp2_ethtool_txq_regs) * (ntxqs)) + \
1944 						 (ARRAY_SIZE(mvpp2_ethtool_rxq_regs) * (nrxqs)) + \
1945 						 ARRAY_SIZE(mvpp2_ethtool_xdp))
1946 
1947 static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset,
1948 				      u8 *data)
1949 {
1950 	struct mvpp2_port *port = netdev_priv(netdev);
1951 	int i, q;
1952 
1953 	if (sset != ETH_SS_STATS)
1954 		return;
1955 
1956 	for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++) {
1957 		strscpy(data, mvpp2_ethtool_mib_regs[i].string,
1958 			ETH_GSTRING_LEN);
1959 		data += ETH_GSTRING_LEN;
1960 	}
1961 
1962 	for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++) {
1963 		strscpy(data, mvpp2_ethtool_port_regs[i].string,
1964 			ETH_GSTRING_LEN);
1965 		data += ETH_GSTRING_LEN;
1966 	}
1967 
1968 	for (q = 0; q < port->ntxqs; q++) {
1969 		for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++) {
1970 			snprintf(data, ETH_GSTRING_LEN,
1971 				 mvpp2_ethtool_txq_regs[i].string, q);
1972 			data += ETH_GSTRING_LEN;
1973 		}
1974 	}
1975 
1976 	for (q = 0; q < port->nrxqs; q++) {
1977 		for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++) {
1978 			snprintf(data, ETH_GSTRING_LEN,
1979 				 mvpp2_ethtool_rxq_regs[i].string,
1980 				 q);
1981 			data += ETH_GSTRING_LEN;
1982 		}
1983 	}
1984 
1985 	for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_xdp); i++) {
1986 		strscpy(data, mvpp2_ethtool_xdp[i].string,
1987 			ETH_GSTRING_LEN);
1988 		data += ETH_GSTRING_LEN;
1989 	}
1990 }
1991 
1992 static void
1993 mvpp2_get_xdp_stats(struct mvpp2_port *port, struct mvpp2_pcpu_stats *xdp_stats)
1994 {
1995 	unsigned int start;
1996 	unsigned int cpu;
1997 
1998 	/* Gather XDP Statistics */
1999 	for_each_possible_cpu(cpu) {
2000 		struct mvpp2_pcpu_stats *cpu_stats;
2001 		u64	xdp_redirect;
2002 		u64	xdp_pass;
2003 		u64	xdp_drop;
2004 		u64	xdp_xmit;
2005 		u64	xdp_xmit_err;
2006 		u64	xdp_tx;
2007 		u64	xdp_tx_err;
2008 
2009 		cpu_stats = per_cpu_ptr(port->stats, cpu);
2010 		do {
2011 			start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
2012 			xdp_redirect = cpu_stats->xdp_redirect;
2013 			xdp_pass   = cpu_stats->xdp_pass;
2014 			xdp_drop = cpu_stats->xdp_drop;
2015 			xdp_xmit   = cpu_stats->xdp_xmit;
2016 			xdp_xmit_err   = cpu_stats->xdp_xmit_err;
2017 			xdp_tx   = cpu_stats->xdp_tx;
2018 			xdp_tx_err   = cpu_stats->xdp_tx_err;
2019 		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
2020 
2021 		xdp_stats->xdp_redirect += xdp_redirect;
2022 		xdp_stats->xdp_pass   += xdp_pass;
2023 		xdp_stats->xdp_drop += xdp_drop;
2024 		xdp_stats->xdp_xmit   += xdp_xmit;
2025 		xdp_stats->xdp_xmit_err   += xdp_xmit_err;
2026 		xdp_stats->xdp_tx   += xdp_tx;
2027 		xdp_stats->xdp_tx_err   += xdp_tx_err;
2028 	}
2029 }
2030 
2031 static void mvpp2_read_stats(struct mvpp2_port *port)
2032 {
2033 	struct mvpp2_pcpu_stats xdp_stats = {};
2034 	const struct mvpp2_ethtool_counter *s;
2035 	u64 *pstats;
2036 	int i, q;
2037 
2038 	pstats = port->ethtool_stats;
2039 
2040 	for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_mib_regs); i++)
2041 		*pstats++ += mvpp2_read_count(port, &mvpp2_ethtool_mib_regs[i]);
2042 
2043 	for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_port_regs); i++)
2044 		*pstats++ += mvpp2_read(port->priv,
2045 					mvpp2_ethtool_port_regs[i].offset +
2046 					4 * port->id);
2047 
2048 	for (q = 0; q < port->ntxqs; q++)
2049 		for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_txq_regs); i++)
2050 			*pstats++ += mvpp2_read_index(port->priv,
2051 						      MVPP22_CTRS_TX_CTR(port->id, q),
2052 						      mvpp2_ethtool_txq_regs[i].offset);
2053 
2054 	/* Rxqs are numbered from 0 from the user standpoint, but not from the
2055 	 * driver's. We need to add the  port->first_rxq offset.
2056 	 */
2057 	for (q = 0; q < port->nrxqs; q++)
2058 		for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_rxq_regs); i++)
2059 			*pstats++ += mvpp2_read_index(port->priv,
2060 						      port->first_rxq + q,
2061 						      mvpp2_ethtool_rxq_regs[i].offset);
2062 
2063 	/* Gather XDP Statistics */
2064 	mvpp2_get_xdp_stats(port, &xdp_stats);
2065 
2066 	for (i = 0, s = mvpp2_ethtool_xdp;
2067 		 s < mvpp2_ethtool_xdp + ARRAY_SIZE(mvpp2_ethtool_xdp);
2068 	     s++, i++) {
2069 		switch (s->offset) {
2070 		case ETHTOOL_XDP_REDIRECT:
2071 			*pstats++ = xdp_stats.xdp_redirect;
2072 			break;
2073 		case ETHTOOL_XDP_PASS:
2074 			*pstats++ = xdp_stats.xdp_pass;
2075 			break;
2076 		case ETHTOOL_XDP_DROP:
2077 			*pstats++ = xdp_stats.xdp_drop;
2078 			break;
2079 		case ETHTOOL_XDP_TX:
2080 			*pstats++ = xdp_stats.xdp_tx;
2081 			break;
2082 		case ETHTOOL_XDP_TX_ERR:
2083 			*pstats++ = xdp_stats.xdp_tx_err;
2084 			break;
2085 		case ETHTOOL_XDP_XMIT:
2086 			*pstats++ = xdp_stats.xdp_xmit;
2087 			break;
2088 		case ETHTOOL_XDP_XMIT_ERR:
2089 			*pstats++ = xdp_stats.xdp_xmit_err;
2090 			break;
2091 		}
2092 	}
2093 }
2094 
2095 static void mvpp2_gather_hw_statistics(struct work_struct *work)
2096 {
2097 	struct delayed_work *del_work = to_delayed_work(work);
2098 	struct mvpp2_port *port = container_of(del_work, struct mvpp2_port,
2099 					       stats_work);
2100 
2101 	mutex_lock(&port->gather_stats_lock);
2102 
2103 	mvpp2_read_stats(port);
2104 
2105 	/* No need to read again the counters right after this function if it
2106 	 * was called asynchronously by the user (ie. use of ethtool).
2107 	 */
2108 	cancel_delayed_work(&port->stats_work);
2109 	queue_delayed_work(port->priv->stats_queue, &port->stats_work,
2110 			   MVPP2_MIB_COUNTERS_STATS_DELAY);
2111 
2112 	mutex_unlock(&port->gather_stats_lock);
2113 }
2114 
2115 static void mvpp2_ethtool_get_stats(struct net_device *dev,
2116 				    struct ethtool_stats *stats, u64 *data)
2117 {
2118 	struct mvpp2_port *port = netdev_priv(dev);
2119 
2120 	/* Update statistics for the given port, then take the lock to avoid
2121 	 * concurrent accesses on the ethtool_stats structure during its copy.
2122 	 */
2123 	mvpp2_gather_hw_statistics(&port->stats_work.work);
2124 
2125 	mutex_lock(&port->gather_stats_lock);
2126 	memcpy(data, port->ethtool_stats,
2127 	       sizeof(u64) * MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs));
2128 	mutex_unlock(&port->gather_stats_lock);
2129 }
2130 
2131 static int mvpp2_ethtool_get_sset_count(struct net_device *dev, int sset)
2132 {
2133 	struct mvpp2_port *port = netdev_priv(dev);
2134 
2135 	if (sset == ETH_SS_STATS)
2136 		return MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs);
2137 
2138 	return -EOPNOTSUPP;
2139 }
2140 
2141 static void mvpp2_mac_reset_assert(struct mvpp2_port *port)
2142 {
2143 	u32 val;
2144 
2145 	val = readl(port->base + MVPP2_GMAC_CTRL_2_REG) |
2146 	      MVPP2_GMAC_PORT_RESET_MASK;
2147 	writel(val, port->base + MVPP2_GMAC_CTRL_2_REG);
2148 
2149 	if (port->priv->hw_version >= MVPP22 && port->gop_id == 0) {
2150 		val = readl(port->base + MVPP22_XLG_CTRL0_REG) &
2151 		      ~MVPP22_XLG_CTRL0_MAC_RESET_DIS;
2152 		writel(val, port->base + MVPP22_XLG_CTRL0_REG);
2153 	}
2154 }
2155 
2156 static void mvpp22_pcs_reset_assert(struct mvpp2_port *port)
2157 {
2158 	struct mvpp2 *priv = port->priv;
2159 	void __iomem *mpcs, *xpcs;
2160 	u32 val;
2161 
2162 	if (port->priv->hw_version == MVPP21 || port->gop_id != 0)
2163 		return;
2164 
2165 	mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id);
2166 	xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id);
2167 
2168 	val = readl(mpcs + MVPP22_MPCS_CLK_RESET);
2169 	val &= ~(MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX | MAC_CLK_RESET_SD_TX);
2170 	val |= MVPP22_MPCS_CLK_RESET_DIV_SET;
2171 	writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
2172 
2173 	val = readl(xpcs + MVPP22_XPCS_CFG0);
2174 	writel(val & ~MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0);
2175 }
2176 
2177 static void mvpp22_pcs_reset_deassert(struct mvpp2_port *port,
2178 				      phy_interface_t interface)
2179 {
2180 	struct mvpp2 *priv = port->priv;
2181 	void __iomem *mpcs, *xpcs;
2182 	u32 val;
2183 
2184 	if (port->priv->hw_version == MVPP21 || port->gop_id != 0)
2185 		return;
2186 
2187 	mpcs = priv->iface_base + MVPP22_MPCS_BASE(port->gop_id);
2188 	xpcs = priv->iface_base + MVPP22_XPCS_BASE(port->gop_id);
2189 
2190 	switch (interface) {
2191 	case PHY_INTERFACE_MODE_5GBASER:
2192 	case PHY_INTERFACE_MODE_10GBASER:
2193 		val = readl(mpcs + MVPP22_MPCS_CLK_RESET);
2194 		val |= MAC_CLK_RESET_MAC | MAC_CLK_RESET_SD_RX |
2195 		       MAC_CLK_RESET_SD_TX;
2196 		val &= ~MVPP22_MPCS_CLK_RESET_DIV_SET;
2197 		writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
2198 		break;
2199 	case PHY_INTERFACE_MODE_XAUI:
2200 	case PHY_INTERFACE_MODE_RXAUI:
2201 		val = readl(xpcs + MVPP22_XPCS_CFG0);
2202 		writel(val | MVPP22_XPCS_CFG0_RESET_DIS, xpcs + MVPP22_XPCS_CFG0);
2203 		break;
2204 	default:
2205 		break;
2206 	}
2207 }
2208 
2209 /* Change maximum receive size of the port */
2210 static inline void mvpp2_gmac_max_rx_size_set(struct mvpp2_port *port)
2211 {
2212 	u32 val;
2213 
2214 	val = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
2215 	val &= ~MVPP2_GMAC_MAX_RX_SIZE_MASK;
2216 	val |= (((port->pkt_size - MVPP2_MH_SIZE) / 2) <<
2217 		    MVPP2_GMAC_MAX_RX_SIZE_OFFS);
2218 	writel(val, port->base + MVPP2_GMAC_CTRL_0_REG);
2219 }
2220 
2221 /* Change maximum receive size of the port */
2222 static inline void mvpp2_xlg_max_rx_size_set(struct mvpp2_port *port)
2223 {
2224 	u32 val;
2225 
2226 	val =  readl(port->base + MVPP22_XLG_CTRL1_REG);
2227 	val &= ~MVPP22_XLG_CTRL1_FRAMESIZELIMIT_MASK;
2228 	val |= ((port->pkt_size - MVPP2_MH_SIZE) / 2) <<
2229 	       MVPP22_XLG_CTRL1_FRAMESIZELIMIT_OFFS;
2230 	writel(val, port->base + MVPP22_XLG_CTRL1_REG);
2231 }
2232 
2233 /* Set defaults to the MVPP2 port */
2234 static void mvpp2_defaults_set(struct mvpp2_port *port)
2235 {
2236 	int tx_port_num, val, queue, lrxq;
2237 
2238 	if (port->priv->hw_version == MVPP21) {
2239 		/* Update TX FIFO MIN Threshold */
2240 		val = readl(port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
2241 		val &= ~MVPP2_GMAC_TX_FIFO_MIN_TH_ALL_MASK;
2242 		/* Min. TX threshold must be less than minimal packet length */
2243 		val |= MVPP2_GMAC_TX_FIFO_MIN_TH_MASK(64 - 4 - 2);
2244 		writel(val, port->base + MVPP2_GMAC_PORT_FIFO_CFG_1_REG);
2245 	}
2246 
2247 	/* Disable Legacy WRR, Disable EJP, Release from reset */
2248 	tx_port_num = mvpp2_egress_port(port);
2249 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG,
2250 		    tx_port_num);
2251 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_CMD_1_REG, 0);
2252 
2253 	/* Set TXQ scheduling to Round-Robin */
2254 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_FIXED_PRIO_REG, 0);
2255 
2256 	/* Close bandwidth for all queues */
2257 	for (queue = 0; queue < MVPP2_MAX_TXQ; queue++)
2258 		mvpp2_write(port->priv,
2259 			    MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(queue), 0);
2260 
2261 	/* Set refill period to 1 usec, refill tokens
2262 	 * and bucket size to maximum
2263 	 */
2264 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_PERIOD_REG,
2265 		    port->priv->tclk / USEC_PER_SEC);
2266 	val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_REFILL_REG);
2267 	val &= ~MVPP2_TXP_REFILL_PERIOD_ALL_MASK;
2268 	val |= MVPP2_TXP_REFILL_PERIOD_MASK(1);
2269 	val |= MVPP2_TXP_REFILL_TOKENS_ALL_MASK;
2270 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_REFILL_REG, val);
2271 	val = MVPP2_TXP_TOKEN_SIZE_MAX;
2272 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val);
2273 
2274 	/* Set MaximumLowLatencyPacketSize value to 256 */
2275 	mvpp2_write(port->priv, MVPP2_RX_CTRL_REG(port->id),
2276 		    MVPP2_RX_USE_PSEUDO_FOR_CSUM_MASK |
2277 		    MVPP2_RX_LOW_LATENCY_PKT_SIZE(256));
2278 
2279 	/* Enable Rx cache snoop */
2280 	for (lrxq = 0; lrxq < port->nrxqs; lrxq++) {
2281 		queue = port->rxqs[lrxq]->id;
2282 		val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
2283 		val |= MVPP2_SNOOP_PKT_SIZE_MASK |
2284 			   MVPP2_SNOOP_BUF_HDR_MASK;
2285 		mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
2286 	}
2287 
2288 	/* At default, mask all interrupts to all present cpus */
2289 	mvpp2_interrupts_disable(port);
2290 }
2291 
2292 /* Enable/disable receiving packets */
2293 static void mvpp2_ingress_enable(struct mvpp2_port *port)
2294 {
2295 	u32 val;
2296 	int lrxq, queue;
2297 
2298 	for (lrxq = 0; lrxq < port->nrxqs; lrxq++) {
2299 		queue = port->rxqs[lrxq]->id;
2300 		val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
2301 		val &= ~MVPP2_RXQ_DISABLE_MASK;
2302 		mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
2303 	}
2304 }
2305 
2306 static void mvpp2_ingress_disable(struct mvpp2_port *port)
2307 {
2308 	u32 val;
2309 	int lrxq, queue;
2310 
2311 	for (lrxq = 0; lrxq < port->nrxqs; lrxq++) {
2312 		queue = port->rxqs[lrxq]->id;
2313 		val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(queue));
2314 		val |= MVPP2_RXQ_DISABLE_MASK;
2315 		mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(queue), val);
2316 	}
2317 }
2318 
2319 /* Enable transmit via physical egress queue
2320  * - HW starts take descriptors from DRAM
2321  */
2322 static void mvpp2_egress_enable(struct mvpp2_port *port)
2323 {
2324 	u32 qmap;
2325 	int queue;
2326 	int tx_port_num = mvpp2_egress_port(port);
2327 
2328 	/* Enable all initialized TXs. */
2329 	qmap = 0;
2330 	for (queue = 0; queue < port->ntxqs; queue++) {
2331 		struct mvpp2_tx_queue *txq = port->txqs[queue];
2332 
2333 		if (txq->descs)
2334 			qmap |= (1 << queue);
2335 	}
2336 
2337 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);
2338 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG, qmap);
2339 }
2340 
2341 /* Disable transmit via physical egress queue
2342  * - HW doesn't take descriptors from DRAM
2343  */
2344 static void mvpp2_egress_disable(struct mvpp2_port *port)
2345 {
2346 	u32 reg_data;
2347 	int delay;
2348 	int tx_port_num = mvpp2_egress_port(port);
2349 
2350 	/* Issue stop command for active channels only */
2351 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);
2352 	reg_data = (mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG)) &
2353 		    MVPP2_TXP_SCHED_ENQ_MASK;
2354 	if (reg_data != 0)
2355 		mvpp2_write(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG,
2356 			    (reg_data << MVPP2_TXP_SCHED_DISQ_OFFSET));
2357 
2358 	/* Wait for all Tx activity to terminate. */
2359 	delay = 0;
2360 	do {
2361 		if (delay >= MVPP2_TX_DISABLE_TIMEOUT_MSEC) {
2362 			netdev_warn(port->dev,
2363 				    "Tx stop timed out, status=0x%08x\n",
2364 				    reg_data);
2365 			break;
2366 		}
2367 		mdelay(1);
2368 		delay++;
2369 
2370 		/* Check port TX Command register that all
2371 		 * Tx queues are stopped
2372 		 */
2373 		reg_data = mvpp2_read(port->priv, MVPP2_TXP_SCHED_Q_CMD_REG);
2374 	} while (reg_data & MVPP2_TXP_SCHED_ENQ_MASK);
2375 }
2376 
2377 /* Rx descriptors helper methods */
2378 
2379 /* Get number of Rx descriptors occupied by received packets */
2380 static inline int
2381 mvpp2_rxq_received(struct mvpp2_port *port, int rxq_id)
2382 {
2383 	u32 val = mvpp2_read(port->priv, MVPP2_RXQ_STATUS_REG(rxq_id));
2384 
2385 	return val & MVPP2_RXQ_OCCUPIED_MASK;
2386 }
2387 
2388 /* Update Rx queue status with the number of occupied and available
2389  * Rx descriptor slots.
2390  */
2391 static inline void
2392 mvpp2_rxq_status_update(struct mvpp2_port *port, int rxq_id,
2393 			int used_count, int free_count)
2394 {
2395 	/* Decrement the number of used descriptors and increment count
2396 	 * increment the number of free descriptors.
2397 	 */
2398 	u32 val = used_count | (free_count << MVPP2_RXQ_NUM_NEW_OFFSET);
2399 
2400 	mvpp2_write(port->priv, MVPP2_RXQ_STATUS_UPDATE_REG(rxq_id), val);
2401 }
2402 
2403 /* Get pointer to next RX descriptor to be processed by SW */
2404 static inline struct mvpp2_rx_desc *
2405 mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq)
2406 {
2407 	int rx_desc = rxq->next_desc_to_proc;
2408 
2409 	rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc);
2410 	prefetch(rxq->descs + rxq->next_desc_to_proc);
2411 	return rxq->descs + rx_desc;
2412 }
2413 
2414 /* Set rx queue offset */
2415 static void mvpp2_rxq_offset_set(struct mvpp2_port *port,
2416 				 int prxq, int offset)
2417 {
2418 	u32 val;
2419 
2420 	/* Convert offset from bytes to units of 32 bytes */
2421 	offset = offset >> 5;
2422 
2423 	val = mvpp2_read(port->priv, MVPP2_RXQ_CONFIG_REG(prxq));
2424 	val &= ~MVPP2_RXQ_PACKET_OFFSET_MASK;
2425 
2426 	/* Offset is in */
2427 	val |= ((offset << MVPP2_RXQ_PACKET_OFFSET_OFFS) &
2428 		    MVPP2_RXQ_PACKET_OFFSET_MASK);
2429 
2430 	mvpp2_write(port->priv, MVPP2_RXQ_CONFIG_REG(prxq), val);
2431 }
2432 
2433 /* Tx descriptors helper methods */
2434 
2435 /* Get pointer to next Tx descriptor to be processed (send) by HW */
2436 static struct mvpp2_tx_desc *
2437 mvpp2_txq_next_desc_get(struct mvpp2_tx_queue *txq)
2438 {
2439 	int tx_desc = txq->next_desc_to_proc;
2440 
2441 	txq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(txq, tx_desc);
2442 	return txq->descs + tx_desc;
2443 }
2444 
2445 /* Update HW with number of aggregated Tx descriptors to be sent
2446  *
2447  * Called only from mvpp2_tx(), so migration is disabled, using
2448  * smp_processor_id() is OK.
2449  */
2450 static void mvpp2_aggr_txq_pend_desc_add(struct mvpp2_port *port, int pending)
2451 {
2452 	/* aggregated access - relevant TXQ number is written in TX desc */
2453 	mvpp2_thread_write(port->priv,
2454 			   mvpp2_cpu_to_thread(port->priv, smp_processor_id()),
2455 			   MVPP2_AGGR_TXQ_UPDATE_REG, pending);
2456 }
2457 
2458 /* Check if there are enough free descriptors in aggregated txq.
2459  * If not, update the number of occupied descriptors and repeat the check.
2460  *
2461  * Called only from mvpp2_tx(), so migration is disabled, using
2462  * smp_processor_id() is OK.
2463  */
2464 static int mvpp2_aggr_desc_num_check(struct mvpp2_port *port,
2465 				     struct mvpp2_tx_queue *aggr_txq, int num)
2466 {
2467 	if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE) {
2468 		/* Update number of occupied aggregated Tx descriptors */
2469 		unsigned int thread =
2470 			mvpp2_cpu_to_thread(port->priv, smp_processor_id());
2471 		u32 val = mvpp2_read_relaxed(port->priv,
2472 					     MVPP2_AGGR_TXQ_STATUS_REG(thread));
2473 
2474 		aggr_txq->count = val & MVPP2_AGGR_TXQ_PENDING_MASK;
2475 
2476 		if ((aggr_txq->count + num) > MVPP2_AGGR_TXQ_SIZE)
2477 			return -ENOMEM;
2478 	}
2479 	return 0;
2480 }
2481 
2482 /* Reserved Tx descriptors allocation request
2483  *
2484  * Called only from mvpp2_txq_reserved_desc_num_proc(), itself called
2485  * only by mvpp2_tx(), so migration is disabled, using
2486  * smp_processor_id() is OK.
2487  */
2488 static int mvpp2_txq_alloc_reserved_desc(struct mvpp2_port *port,
2489 					 struct mvpp2_tx_queue *txq, int num)
2490 {
2491 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
2492 	struct mvpp2 *priv = port->priv;
2493 	u32 val;
2494 
2495 	val = (txq->id << MVPP2_TXQ_RSVD_REQ_Q_OFFSET) | num;
2496 	mvpp2_thread_write_relaxed(priv, thread, MVPP2_TXQ_RSVD_REQ_REG, val);
2497 
2498 	val = mvpp2_thread_read_relaxed(priv, thread, MVPP2_TXQ_RSVD_RSLT_REG);
2499 
2500 	return val & MVPP2_TXQ_RSVD_RSLT_MASK;
2501 }
2502 
2503 /* Check if there are enough reserved descriptors for transmission.
2504  * If not, request chunk of reserved descriptors and check again.
2505  */
2506 static int mvpp2_txq_reserved_desc_num_proc(struct mvpp2_port *port,
2507 					    struct mvpp2_tx_queue *txq,
2508 					    struct mvpp2_txq_pcpu *txq_pcpu,
2509 					    int num)
2510 {
2511 	int req, desc_count;
2512 	unsigned int thread;
2513 
2514 	if (txq_pcpu->reserved_num >= num)
2515 		return 0;
2516 
2517 	/* Not enough descriptors reserved! Update the reserved descriptor
2518 	 * count and check again.
2519 	 */
2520 
2521 	desc_count = 0;
2522 	/* Compute total of used descriptors */
2523 	for (thread = 0; thread < port->priv->nthreads; thread++) {
2524 		struct mvpp2_txq_pcpu *txq_pcpu_aux;
2525 
2526 		txq_pcpu_aux = per_cpu_ptr(txq->pcpu, thread);
2527 		desc_count += txq_pcpu_aux->count;
2528 		desc_count += txq_pcpu_aux->reserved_num;
2529 	}
2530 
2531 	req = max(MVPP2_CPU_DESC_CHUNK, num - txq_pcpu->reserved_num);
2532 	desc_count += req;
2533 
2534 	if (desc_count >
2535 	   (txq->size - (MVPP2_MAX_THREADS * MVPP2_CPU_DESC_CHUNK)))
2536 		return -ENOMEM;
2537 
2538 	txq_pcpu->reserved_num += mvpp2_txq_alloc_reserved_desc(port, txq, req);
2539 
2540 	/* OK, the descriptor could have been updated: check again. */
2541 	if (txq_pcpu->reserved_num < num)
2542 		return -ENOMEM;
2543 	return 0;
2544 }
2545 
2546 /* Release the last allocated Tx descriptor. Useful to handle DMA
2547  * mapping failures in the Tx path.
2548  */
2549 static void mvpp2_txq_desc_put(struct mvpp2_tx_queue *txq)
2550 {
2551 	if (txq->next_desc_to_proc == 0)
2552 		txq->next_desc_to_proc = txq->last_desc - 1;
2553 	else
2554 		txq->next_desc_to_proc--;
2555 }
2556 
2557 /* Set Tx descriptors fields relevant for CSUM calculation */
2558 static u32 mvpp2_txq_desc_csum(int l3_offs, __be16 l3_proto,
2559 			       int ip_hdr_len, int l4_proto)
2560 {
2561 	u32 command;
2562 
2563 	/* fields: L3_offset, IP_hdrlen, L3_type, G_IPv4_chk,
2564 	 * G_L4_chk, L4_type required only for checksum calculation
2565 	 */
2566 	command = (l3_offs << MVPP2_TXD_L3_OFF_SHIFT);
2567 	command |= (ip_hdr_len << MVPP2_TXD_IP_HLEN_SHIFT);
2568 	command |= MVPP2_TXD_IP_CSUM_DISABLE;
2569 
2570 	if (l3_proto == htons(ETH_P_IP)) {
2571 		command &= ~MVPP2_TXD_IP_CSUM_DISABLE;	/* enable IPv4 csum */
2572 		command &= ~MVPP2_TXD_L3_IP6;		/* enable IPv4 */
2573 	} else {
2574 		command |= MVPP2_TXD_L3_IP6;		/* enable IPv6 */
2575 	}
2576 
2577 	if (l4_proto == IPPROTO_TCP) {
2578 		command &= ~MVPP2_TXD_L4_UDP;		/* enable TCP */
2579 		command &= ~MVPP2_TXD_L4_CSUM_FRAG;	/* generate L4 csum */
2580 	} else if (l4_proto == IPPROTO_UDP) {
2581 		command |= MVPP2_TXD_L4_UDP;		/* enable UDP */
2582 		command &= ~MVPP2_TXD_L4_CSUM_FRAG;	/* generate L4 csum */
2583 	} else {
2584 		command |= MVPP2_TXD_L4_CSUM_NOT;
2585 	}
2586 
2587 	return command;
2588 }
2589 
2590 /* Get number of sent descriptors and decrement counter.
2591  * The number of sent descriptors is returned.
2592  * Per-thread access
2593  *
2594  * Called only from mvpp2_txq_done(), called from mvpp2_tx()
2595  * (migration disabled) and from the TX completion tasklet (migration
2596  * disabled) so using smp_processor_id() is OK.
2597  */
2598 static inline int mvpp2_txq_sent_desc_proc(struct mvpp2_port *port,
2599 					   struct mvpp2_tx_queue *txq)
2600 {
2601 	u32 val;
2602 
2603 	/* Reading status reg resets transmitted descriptor counter */
2604 	val = mvpp2_thread_read_relaxed(port->priv,
2605 					mvpp2_cpu_to_thread(port->priv, smp_processor_id()),
2606 					MVPP2_TXQ_SENT_REG(txq->id));
2607 
2608 	return (val & MVPP2_TRANSMITTED_COUNT_MASK) >>
2609 		MVPP2_TRANSMITTED_COUNT_OFFSET;
2610 }
2611 
2612 /* Called through on_each_cpu(), so runs on all CPUs, with migration
2613  * disabled, therefore using smp_processor_id() is OK.
2614  */
2615 static void mvpp2_txq_sent_counter_clear(void *arg)
2616 {
2617 	struct mvpp2_port *port = arg;
2618 	int queue;
2619 
2620 	/* If the thread isn't used, don't do anything */
2621 	if (smp_processor_id() >= port->priv->nthreads)
2622 		return;
2623 
2624 	for (queue = 0; queue < port->ntxqs; queue++) {
2625 		int id = port->txqs[queue]->id;
2626 
2627 		mvpp2_thread_read(port->priv,
2628 				  mvpp2_cpu_to_thread(port->priv, smp_processor_id()),
2629 				  MVPP2_TXQ_SENT_REG(id));
2630 	}
2631 }
2632 
2633 /* Set max sizes for Tx queues */
2634 static void mvpp2_txp_max_tx_size_set(struct mvpp2_port *port)
2635 {
2636 	u32	val, size, mtu;
2637 	int	txq, tx_port_num;
2638 
2639 	mtu = port->pkt_size * 8;
2640 	if (mtu > MVPP2_TXP_MTU_MAX)
2641 		mtu = MVPP2_TXP_MTU_MAX;
2642 
2643 	/* WA for wrong Token bucket update: Set MTU value = 3*real MTU value */
2644 	mtu = 3 * mtu;
2645 
2646 	/* Indirect access to registers */
2647 	tx_port_num = mvpp2_egress_port(port);
2648 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);
2649 
2650 	/* Set MTU */
2651 	val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_MTU_REG);
2652 	val &= ~MVPP2_TXP_MTU_MAX;
2653 	val |= mtu;
2654 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_MTU_REG, val);
2655 
2656 	/* TXP token size and all TXQs token size must be larger that MTU */
2657 	val = mvpp2_read(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG);
2658 	size = val & MVPP2_TXP_TOKEN_SIZE_MAX;
2659 	if (size < mtu) {
2660 		size = mtu;
2661 		val &= ~MVPP2_TXP_TOKEN_SIZE_MAX;
2662 		val |= size;
2663 		mvpp2_write(port->priv, MVPP2_TXP_SCHED_TOKEN_SIZE_REG, val);
2664 	}
2665 
2666 	for (txq = 0; txq < port->ntxqs; txq++) {
2667 		val = mvpp2_read(port->priv,
2668 				 MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq));
2669 		size = val & MVPP2_TXQ_TOKEN_SIZE_MAX;
2670 
2671 		if (size < mtu) {
2672 			size = mtu;
2673 			val &= ~MVPP2_TXQ_TOKEN_SIZE_MAX;
2674 			val |= size;
2675 			mvpp2_write(port->priv,
2676 				    MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq),
2677 				    val);
2678 		}
2679 	}
2680 }
2681 
2682 /* Set the number of non-occupied descriptors threshold */
2683 static void mvpp2_set_rxq_free_tresh(struct mvpp2_port *port,
2684 				     struct mvpp2_rx_queue *rxq)
2685 {
2686 	u32 val;
2687 
2688 	mvpp2_write(port->priv, MVPP2_RXQ_NUM_REG, rxq->id);
2689 
2690 	val = mvpp2_read(port->priv, MVPP2_RXQ_THRESH_REG);
2691 	val &= ~MVPP2_RXQ_NON_OCCUPIED_MASK;
2692 	val |= MSS_THRESHOLD_STOP << MVPP2_RXQ_NON_OCCUPIED_OFFSET;
2693 	mvpp2_write(port->priv, MVPP2_RXQ_THRESH_REG, val);
2694 }
2695 
2696 /* Set the number of packets that will be received before Rx interrupt
2697  * will be generated by HW.
2698  */
2699 static void mvpp2_rx_pkts_coal_set(struct mvpp2_port *port,
2700 				   struct mvpp2_rx_queue *rxq)
2701 {
2702 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
2703 
2704 	if (rxq->pkts_coal > MVPP2_OCCUPIED_THRESH_MASK)
2705 		rxq->pkts_coal = MVPP2_OCCUPIED_THRESH_MASK;
2706 
2707 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id);
2708 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_THRESH_REG,
2709 			   rxq->pkts_coal);
2710 
2711 	put_cpu();
2712 }
2713 
2714 /* For some reason in the LSP this is done on each CPU. Why ? */
2715 static void mvpp2_tx_pkts_coal_set(struct mvpp2_port *port,
2716 				   struct mvpp2_tx_queue *txq)
2717 {
2718 	unsigned int thread;
2719 	u32 val;
2720 
2721 	if (txq->done_pkts_coal > MVPP2_TXQ_THRESH_MASK)
2722 		txq->done_pkts_coal = MVPP2_TXQ_THRESH_MASK;
2723 
2724 	val = (txq->done_pkts_coal << MVPP2_TXQ_THRESH_OFFSET);
2725 	/* PKT-coalescing registers are per-queue + per-thread */
2726 	for (thread = 0; thread < MVPP2_MAX_THREADS; thread++) {
2727 		mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id);
2728 		mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_THRESH_REG, val);
2729 	}
2730 }
2731 
2732 static u32 mvpp2_usec_to_cycles(u32 usec, unsigned long clk_hz)
2733 {
2734 	u64 tmp = (u64)clk_hz * usec;
2735 
2736 	do_div(tmp, USEC_PER_SEC);
2737 
2738 	return tmp > U32_MAX ? U32_MAX : tmp;
2739 }
2740 
2741 static u32 mvpp2_cycles_to_usec(u32 cycles, unsigned long clk_hz)
2742 {
2743 	u64 tmp = (u64)cycles * USEC_PER_SEC;
2744 
2745 	do_div(tmp, clk_hz);
2746 
2747 	return tmp > U32_MAX ? U32_MAX : tmp;
2748 }
2749 
2750 /* Set the time delay in usec before Rx interrupt */
2751 static void mvpp2_rx_time_coal_set(struct mvpp2_port *port,
2752 				   struct mvpp2_rx_queue *rxq)
2753 {
2754 	unsigned long freq = port->priv->tclk;
2755 	u32 val = mvpp2_usec_to_cycles(rxq->time_coal, freq);
2756 
2757 	if (val > MVPP2_MAX_ISR_RX_THRESHOLD) {
2758 		rxq->time_coal =
2759 			mvpp2_cycles_to_usec(MVPP2_MAX_ISR_RX_THRESHOLD, freq);
2760 
2761 		/* re-evaluate to get actual register value */
2762 		val = mvpp2_usec_to_cycles(rxq->time_coal, freq);
2763 	}
2764 
2765 	mvpp2_write(port->priv, MVPP2_ISR_RX_THRESHOLD_REG(rxq->id), val);
2766 }
2767 
2768 static void mvpp2_tx_time_coal_set(struct mvpp2_port *port)
2769 {
2770 	unsigned long freq = port->priv->tclk;
2771 	u32 val = mvpp2_usec_to_cycles(port->tx_time_coal, freq);
2772 
2773 	if (val > MVPP2_MAX_ISR_TX_THRESHOLD) {
2774 		port->tx_time_coal =
2775 			mvpp2_cycles_to_usec(MVPP2_MAX_ISR_TX_THRESHOLD, freq);
2776 
2777 		/* re-evaluate to get actual register value */
2778 		val = mvpp2_usec_to_cycles(port->tx_time_coal, freq);
2779 	}
2780 
2781 	mvpp2_write(port->priv, MVPP2_ISR_TX_THRESHOLD_REG(port->id), val);
2782 }
2783 
2784 /* Free Tx queue skbuffs */
2785 static void mvpp2_txq_bufs_free(struct mvpp2_port *port,
2786 				struct mvpp2_tx_queue *txq,
2787 				struct mvpp2_txq_pcpu *txq_pcpu, int num)
2788 {
2789 	struct xdp_frame_bulk bq;
2790 	int i;
2791 
2792 	xdp_frame_bulk_init(&bq);
2793 
2794 	rcu_read_lock(); /* need for xdp_return_frame_bulk */
2795 
2796 	for (i = 0; i < num; i++) {
2797 		struct mvpp2_txq_pcpu_buf *tx_buf =
2798 			txq_pcpu->buffs + txq_pcpu->txq_get_index;
2799 
2800 		if (!IS_TSO_HEADER(txq_pcpu, tx_buf->dma) &&
2801 		    tx_buf->type != MVPP2_TYPE_XDP_TX)
2802 			dma_unmap_single(port->dev->dev.parent, tx_buf->dma,
2803 					 tx_buf->size, DMA_TO_DEVICE);
2804 		if (tx_buf->type == MVPP2_TYPE_SKB && tx_buf->skb)
2805 			dev_kfree_skb_any(tx_buf->skb);
2806 		else if (tx_buf->type == MVPP2_TYPE_XDP_TX ||
2807 			 tx_buf->type == MVPP2_TYPE_XDP_NDO)
2808 			xdp_return_frame_bulk(tx_buf->xdpf, &bq);
2809 
2810 		mvpp2_txq_inc_get(txq_pcpu);
2811 	}
2812 	xdp_flush_frame_bulk(&bq);
2813 
2814 	rcu_read_unlock();
2815 }
2816 
2817 static inline struct mvpp2_rx_queue *mvpp2_get_rx_queue(struct mvpp2_port *port,
2818 							u32 cause)
2819 {
2820 	int queue = fls(cause) - 1;
2821 
2822 	return port->rxqs[queue];
2823 }
2824 
2825 static inline struct mvpp2_tx_queue *mvpp2_get_tx_queue(struct mvpp2_port *port,
2826 							u32 cause)
2827 {
2828 	int queue = fls(cause) - 1;
2829 
2830 	return port->txqs[queue];
2831 }
2832 
2833 /* Handle end of transmission */
2834 static void mvpp2_txq_done(struct mvpp2_port *port, struct mvpp2_tx_queue *txq,
2835 			   struct mvpp2_txq_pcpu *txq_pcpu)
2836 {
2837 	struct netdev_queue *nq = netdev_get_tx_queue(port->dev, txq->log_id);
2838 	int tx_done;
2839 
2840 	if (txq_pcpu->thread != mvpp2_cpu_to_thread(port->priv, smp_processor_id()))
2841 		netdev_err(port->dev, "wrong cpu on the end of Tx processing\n");
2842 
2843 	tx_done = mvpp2_txq_sent_desc_proc(port, txq);
2844 	if (!tx_done)
2845 		return;
2846 	mvpp2_txq_bufs_free(port, txq, txq_pcpu, tx_done);
2847 
2848 	txq_pcpu->count -= tx_done;
2849 
2850 	if (netif_tx_queue_stopped(nq))
2851 		if (txq_pcpu->count <= txq_pcpu->wake_threshold)
2852 			netif_tx_wake_queue(nq);
2853 }
2854 
2855 static unsigned int mvpp2_tx_done(struct mvpp2_port *port, u32 cause,
2856 				  unsigned int thread)
2857 {
2858 	struct mvpp2_tx_queue *txq;
2859 	struct mvpp2_txq_pcpu *txq_pcpu;
2860 	unsigned int tx_todo = 0;
2861 
2862 	while (cause) {
2863 		txq = mvpp2_get_tx_queue(port, cause);
2864 		if (!txq)
2865 			break;
2866 
2867 		txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
2868 
2869 		if (txq_pcpu->count) {
2870 			mvpp2_txq_done(port, txq, txq_pcpu);
2871 			tx_todo += txq_pcpu->count;
2872 		}
2873 
2874 		cause &= ~(1 << txq->log_id);
2875 	}
2876 	return tx_todo;
2877 }
2878 
2879 /* Rx/Tx queue initialization/cleanup methods */
2880 
2881 /* Allocate and initialize descriptors for aggr TXQ */
2882 static int mvpp2_aggr_txq_init(struct platform_device *pdev,
2883 			       struct mvpp2_tx_queue *aggr_txq,
2884 			       unsigned int thread, struct mvpp2 *priv)
2885 {
2886 	u32 txq_dma;
2887 
2888 	/* Allocate memory for TX descriptors */
2889 	aggr_txq->descs = dma_alloc_coherent(&pdev->dev,
2890 					     MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE,
2891 					     &aggr_txq->descs_dma, GFP_KERNEL);
2892 	if (!aggr_txq->descs)
2893 		return -ENOMEM;
2894 
2895 	aggr_txq->last_desc = MVPP2_AGGR_TXQ_SIZE - 1;
2896 
2897 	/* Aggr TXQ no reset WA */
2898 	aggr_txq->next_desc_to_proc = mvpp2_read(priv,
2899 						 MVPP2_AGGR_TXQ_INDEX_REG(thread));
2900 
2901 	/* Set Tx descriptors queue starting address indirect
2902 	 * access
2903 	 */
2904 	if (priv->hw_version == MVPP21)
2905 		txq_dma = aggr_txq->descs_dma;
2906 	else
2907 		txq_dma = aggr_txq->descs_dma >>
2908 			MVPP22_AGGR_TXQ_DESC_ADDR_OFFS;
2909 
2910 	mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_ADDR_REG(thread), txq_dma);
2911 	mvpp2_write(priv, MVPP2_AGGR_TXQ_DESC_SIZE_REG(thread),
2912 		    MVPP2_AGGR_TXQ_SIZE);
2913 
2914 	return 0;
2915 }
2916 
2917 /* Create a specified Rx queue */
2918 static int mvpp2_rxq_init(struct mvpp2_port *port,
2919 			  struct mvpp2_rx_queue *rxq)
2920 {
2921 	struct mvpp2 *priv = port->priv;
2922 	unsigned int thread;
2923 	u32 rxq_dma;
2924 	int err;
2925 
2926 	rxq->size = port->rx_ring_size;
2927 
2928 	/* Allocate memory for RX descriptors */
2929 	rxq->descs = dma_alloc_coherent(port->dev->dev.parent,
2930 					rxq->size * MVPP2_DESC_ALIGNED_SIZE,
2931 					&rxq->descs_dma, GFP_KERNEL);
2932 	if (!rxq->descs)
2933 		return -ENOMEM;
2934 
2935 	rxq->last_desc = rxq->size - 1;
2936 
2937 	/* Zero occupied and non-occupied counters - direct access */
2938 	mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0);
2939 
2940 	/* Set Rx descriptors queue starting address - indirect access */
2941 	thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
2942 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id);
2943 	if (port->priv->hw_version == MVPP21)
2944 		rxq_dma = rxq->descs_dma;
2945 	else
2946 		rxq_dma = rxq->descs_dma >> MVPP22_DESC_ADDR_OFFS;
2947 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, rxq_dma);
2948 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, rxq->size);
2949 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_INDEX_REG, 0);
2950 	put_cpu();
2951 
2952 	/* Set Offset */
2953 	mvpp2_rxq_offset_set(port, rxq->id, MVPP2_SKB_HEADROOM);
2954 
2955 	/* Set coalescing pkts and time */
2956 	mvpp2_rx_pkts_coal_set(port, rxq);
2957 	mvpp2_rx_time_coal_set(port, rxq);
2958 
2959 	/* Set the number of non occupied descriptors threshold */
2960 	mvpp2_set_rxq_free_tresh(port, rxq);
2961 
2962 	/* Add number of descriptors ready for receiving packets */
2963 	mvpp2_rxq_status_update(port, rxq->id, 0, rxq->size);
2964 
2965 	if (priv->percpu_pools) {
2966 		err = xdp_rxq_info_reg(&rxq->xdp_rxq_short, port->dev, rxq->logic_rxq, 0);
2967 		if (err < 0)
2968 			goto err_free_dma;
2969 
2970 		err = xdp_rxq_info_reg(&rxq->xdp_rxq_long, port->dev, rxq->logic_rxq, 0);
2971 		if (err < 0)
2972 			goto err_unregister_rxq_short;
2973 
2974 		/* Every RXQ has a pool for short and another for long packets */
2975 		err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_short,
2976 						 MEM_TYPE_PAGE_POOL,
2977 						 priv->page_pool[rxq->logic_rxq]);
2978 		if (err < 0)
2979 			goto err_unregister_rxq_long;
2980 
2981 		err = xdp_rxq_info_reg_mem_model(&rxq->xdp_rxq_long,
2982 						 MEM_TYPE_PAGE_POOL,
2983 						 priv->page_pool[rxq->logic_rxq +
2984 								 port->nrxqs]);
2985 		if (err < 0)
2986 			goto err_unregister_mem_rxq_short;
2987 	}
2988 
2989 	return 0;
2990 
2991 err_unregister_mem_rxq_short:
2992 	xdp_rxq_info_unreg_mem_model(&rxq->xdp_rxq_short);
2993 err_unregister_rxq_long:
2994 	xdp_rxq_info_unreg(&rxq->xdp_rxq_long);
2995 err_unregister_rxq_short:
2996 	xdp_rxq_info_unreg(&rxq->xdp_rxq_short);
2997 err_free_dma:
2998 	dma_free_coherent(port->dev->dev.parent,
2999 			  rxq->size * MVPP2_DESC_ALIGNED_SIZE,
3000 			  rxq->descs, rxq->descs_dma);
3001 	return err;
3002 }
3003 
3004 /* Push packets received by the RXQ to BM pool */
3005 static void mvpp2_rxq_drop_pkts(struct mvpp2_port *port,
3006 				struct mvpp2_rx_queue *rxq)
3007 {
3008 	int rx_received, i;
3009 
3010 	rx_received = mvpp2_rxq_received(port, rxq->id);
3011 	if (!rx_received)
3012 		return;
3013 
3014 	for (i = 0; i < rx_received; i++) {
3015 		struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq);
3016 		u32 status = mvpp2_rxdesc_status_get(port, rx_desc);
3017 		int pool;
3018 
3019 		pool = (status & MVPP2_RXD_BM_POOL_ID_MASK) >>
3020 			MVPP2_RXD_BM_POOL_ID_OFFS;
3021 
3022 		mvpp2_bm_pool_put(port, pool,
3023 				  mvpp2_rxdesc_dma_addr_get(port, rx_desc),
3024 				  mvpp2_rxdesc_cookie_get(port, rx_desc));
3025 	}
3026 	mvpp2_rxq_status_update(port, rxq->id, rx_received, rx_received);
3027 }
3028 
3029 /* Cleanup Rx queue */
3030 static void mvpp2_rxq_deinit(struct mvpp2_port *port,
3031 			     struct mvpp2_rx_queue *rxq)
3032 {
3033 	unsigned int thread;
3034 
3035 	if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_short))
3036 		xdp_rxq_info_unreg(&rxq->xdp_rxq_short);
3037 
3038 	if (xdp_rxq_info_is_reg(&rxq->xdp_rxq_long))
3039 		xdp_rxq_info_unreg(&rxq->xdp_rxq_long);
3040 
3041 	mvpp2_rxq_drop_pkts(port, rxq);
3042 
3043 	if (rxq->descs)
3044 		dma_free_coherent(port->dev->dev.parent,
3045 				  rxq->size * MVPP2_DESC_ALIGNED_SIZE,
3046 				  rxq->descs,
3047 				  rxq->descs_dma);
3048 
3049 	rxq->descs             = NULL;
3050 	rxq->last_desc         = 0;
3051 	rxq->next_desc_to_proc = 0;
3052 	rxq->descs_dma         = 0;
3053 
3054 	/* Clear Rx descriptors queue starting address and size;
3055 	 * free descriptor number
3056 	 */
3057 	mvpp2_write(port->priv, MVPP2_RXQ_STATUS_REG(rxq->id), 0);
3058 	thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
3059 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_NUM_REG, rxq->id);
3060 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_ADDR_REG, 0);
3061 	mvpp2_thread_write(port->priv, thread, MVPP2_RXQ_DESC_SIZE_REG, 0);
3062 	put_cpu();
3063 }
3064 
3065 /* Create and initialize a Tx queue */
3066 static int mvpp2_txq_init(struct mvpp2_port *port,
3067 			  struct mvpp2_tx_queue *txq)
3068 {
3069 	u32 val;
3070 	unsigned int thread;
3071 	int desc, desc_per_txq, tx_port_num;
3072 	struct mvpp2_txq_pcpu *txq_pcpu;
3073 
3074 	txq->size = port->tx_ring_size;
3075 
3076 	/* Allocate memory for Tx descriptors */
3077 	txq->descs = dma_alloc_coherent(port->dev->dev.parent,
3078 				txq->size * MVPP2_DESC_ALIGNED_SIZE,
3079 				&txq->descs_dma, GFP_KERNEL);
3080 	if (!txq->descs)
3081 		return -ENOMEM;
3082 
3083 	txq->last_desc = txq->size - 1;
3084 
3085 	/* Set Tx descriptors queue starting address - indirect access */
3086 	thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
3087 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id);
3088 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG,
3089 			   txq->descs_dma);
3090 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG,
3091 			   txq->size & MVPP2_TXQ_DESC_SIZE_MASK);
3092 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_INDEX_REG, 0);
3093 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_RSVD_CLR_REG,
3094 			   txq->id << MVPP2_TXQ_RSVD_CLR_OFFSET);
3095 	val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PENDING_REG);
3096 	val &= ~MVPP2_TXQ_PENDING_MASK;
3097 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PENDING_REG, val);
3098 
3099 	/* Calculate base address in prefetch buffer. We reserve 16 descriptors
3100 	 * for each existing TXQ.
3101 	 * TCONTS for PON port must be continuous from 0 to MVPP2_MAX_TCONT
3102 	 * GBE ports assumed to be continuous from 0 to MVPP2_MAX_PORTS
3103 	 */
3104 	desc_per_txq = 16;
3105 	desc = (port->id * MVPP2_MAX_TXQ * desc_per_txq) +
3106 	       (txq->log_id * desc_per_txq);
3107 
3108 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG,
3109 			   MVPP2_PREF_BUF_PTR(desc) | MVPP2_PREF_BUF_SIZE_16 |
3110 			   MVPP2_PREF_BUF_THRESH(desc_per_txq / 2));
3111 	put_cpu();
3112 
3113 	/* WRR / EJP configuration - indirect access */
3114 	tx_port_num = mvpp2_egress_port(port);
3115 	mvpp2_write(port->priv, MVPP2_TXP_SCHED_PORT_INDEX_REG, tx_port_num);
3116 
3117 	val = mvpp2_read(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id));
3118 	val &= ~MVPP2_TXQ_REFILL_PERIOD_ALL_MASK;
3119 	val |= MVPP2_TXQ_REFILL_PERIOD_MASK(1);
3120 	val |= MVPP2_TXQ_REFILL_TOKENS_ALL_MASK;
3121 	mvpp2_write(port->priv, MVPP2_TXQ_SCHED_REFILL_REG(txq->log_id), val);
3122 
3123 	val = MVPP2_TXQ_TOKEN_SIZE_MAX;
3124 	mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_SIZE_REG(txq->log_id),
3125 		    val);
3126 
3127 	for (thread = 0; thread < port->priv->nthreads; thread++) {
3128 		txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
3129 		txq_pcpu->size = txq->size;
3130 		txq_pcpu->buffs = kmalloc_array(txq_pcpu->size,
3131 						sizeof(*txq_pcpu->buffs),
3132 						GFP_KERNEL);
3133 		if (!txq_pcpu->buffs)
3134 			return -ENOMEM;
3135 
3136 		txq_pcpu->count = 0;
3137 		txq_pcpu->reserved_num = 0;
3138 		txq_pcpu->txq_put_index = 0;
3139 		txq_pcpu->txq_get_index = 0;
3140 		txq_pcpu->tso_headers = NULL;
3141 
3142 		txq_pcpu->stop_threshold = txq->size - MVPP2_MAX_SKB_DESCS;
3143 		txq_pcpu->wake_threshold = txq_pcpu->stop_threshold / 2;
3144 
3145 		txq_pcpu->tso_headers =
3146 			dma_alloc_coherent(port->dev->dev.parent,
3147 					   txq_pcpu->size * TSO_HEADER_SIZE,
3148 					   &txq_pcpu->tso_headers_dma,
3149 					   GFP_KERNEL);
3150 		if (!txq_pcpu->tso_headers)
3151 			return -ENOMEM;
3152 	}
3153 
3154 	return 0;
3155 }
3156 
3157 /* Free allocated TXQ resources */
3158 static void mvpp2_txq_deinit(struct mvpp2_port *port,
3159 			     struct mvpp2_tx_queue *txq)
3160 {
3161 	struct mvpp2_txq_pcpu *txq_pcpu;
3162 	unsigned int thread;
3163 
3164 	for (thread = 0; thread < port->priv->nthreads; thread++) {
3165 		txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
3166 		kfree(txq_pcpu->buffs);
3167 
3168 		if (txq_pcpu->tso_headers)
3169 			dma_free_coherent(port->dev->dev.parent,
3170 					  txq_pcpu->size * TSO_HEADER_SIZE,
3171 					  txq_pcpu->tso_headers,
3172 					  txq_pcpu->tso_headers_dma);
3173 
3174 		txq_pcpu->tso_headers = NULL;
3175 	}
3176 
3177 	if (txq->descs)
3178 		dma_free_coherent(port->dev->dev.parent,
3179 				  txq->size * MVPP2_DESC_ALIGNED_SIZE,
3180 				  txq->descs, txq->descs_dma);
3181 
3182 	txq->descs             = NULL;
3183 	txq->last_desc         = 0;
3184 	txq->next_desc_to_proc = 0;
3185 	txq->descs_dma         = 0;
3186 
3187 	/* Set minimum bandwidth for disabled TXQs */
3188 	mvpp2_write(port->priv, MVPP2_TXQ_SCHED_TOKEN_CNTR_REG(txq->log_id), 0);
3189 
3190 	/* Set Tx descriptors queue starting address and size */
3191 	thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
3192 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id);
3193 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_ADDR_REG, 0);
3194 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_DESC_SIZE_REG, 0);
3195 	put_cpu();
3196 }
3197 
3198 /* Cleanup Tx ports */
3199 static void mvpp2_txq_clean(struct mvpp2_port *port, struct mvpp2_tx_queue *txq)
3200 {
3201 	struct mvpp2_txq_pcpu *txq_pcpu;
3202 	int delay, pending;
3203 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, get_cpu());
3204 	u32 val;
3205 
3206 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_NUM_REG, txq->id);
3207 	val = mvpp2_thread_read(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG);
3208 	val |= MVPP2_TXQ_DRAIN_EN_MASK;
3209 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val);
3210 
3211 	/* The napi queue has been stopped so wait for all packets
3212 	 * to be transmitted.
3213 	 */
3214 	delay = 0;
3215 	do {
3216 		if (delay >= MVPP2_TX_PENDING_TIMEOUT_MSEC) {
3217 			netdev_warn(port->dev,
3218 				    "port %d: cleaning queue %d timed out\n",
3219 				    port->id, txq->log_id);
3220 			break;
3221 		}
3222 		mdelay(1);
3223 		delay++;
3224 
3225 		pending = mvpp2_thread_read(port->priv, thread,
3226 					    MVPP2_TXQ_PENDING_REG);
3227 		pending &= MVPP2_TXQ_PENDING_MASK;
3228 	} while (pending);
3229 
3230 	val &= ~MVPP2_TXQ_DRAIN_EN_MASK;
3231 	mvpp2_thread_write(port->priv, thread, MVPP2_TXQ_PREF_BUF_REG, val);
3232 	put_cpu();
3233 
3234 	for (thread = 0; thread < port->priv->nthreads; thread++) {
3235 		txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
3236 
3237 		/* Release all packets */
3238 		mvpp2_txq_bufs_free(port, txq, txq_pcpu, txq_pcpu->count);
3239 
3240 		/* Reset queue */
3241 		txq_pcpu->count = 0;
3242 		txq_pcpu->txq_put_index = 0;
3243 		txq_pcpu->txq_get_index = 0;
3244 	}
3245 }
3246 
3247 /* Cleanup all Tx queues */
3248 static void mvpp2_cleanup_txqs(struct mvpp2_port *port)
3249 {
3250 	struct mvpp2_tx_queue *txq;
3251 	int queue;
3252 	u32 val;
3253 
3254 	val = mvpp2_read(port->priv, MVPP2_TX_PORT_FLUSH_REG);
3255 
3256 	/* Reset Tx ports and delete Tx queues */
3257 	val |= MVPP2_TX_PORT_FLUSH_MASK(port->id);
3258 	mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val);
3259 
3260 	for (queue = 0; queue < port->ntxqs; queue++) {
3261 		txq = port->txqs[queue];
3262 		mvpp2_txq_clean(port, txq);
3263 		mvpp2_txq_deinit(port, txq);
3264 	}
3265 
3266 	on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1);
3267 
3268 	val &= ~MVPP2_TX_PORT_FLUSH_MASK(port->id);
3269 	mvpp2_write(port->priv, MVPP2_TX_PORT_FLUSH_REG, val);
3270 }
3271 
3272 /* Cleanup all Rx queues */
3273 static void mvpp2_cleanup_rxqs(struct mvpp2_port *port)
3274 {
3275 	int queue;
3276 
3277 	for (queue = 0; queue < port->nrxqs; queue++)
3278 		mvpp2_rxq_deinit(port, port->rxqs[queue]);
3279 
3280 	if (port->tx_fc)
3281 		mvpp2_rxq_disable_fc(port);
3282 }
3283 
3284 /* Init all Rx queues for port */
3285 static int mvpp2_setup_rxqs(struct mvpp2_port *port)
3286 {
3287 	int queue, err;
3288 
3289 	for (queue = 0; queue < port->nrxqs; queue++) {
3290 		err = mvpp2_rxq_init(port, port->rxqs[queue]);
3291 		if (err)
3292 			goto err_cleanup;
3293 	}
3294 
3295 	if (port->tx_fc)
3296 		mvpp2_rxq_enable_fc(port);
3297 
3298 	return 0;
3299 
3300 err_cleanup:
3301 	mvpp2_cleanup_rxqs(port);
3302 	return err;
3303 }
3304 
3305 /* Init all tx queues for port */
3306 static int mvpp2_setup_txqs(struct mvpp2_port *port)
3307 {
3308 	struct mvpp2_tx_queue *txq;
3309 	int queue, err;
3310 
3311 	for (queue = 0; queue < port->ntxqs; queue++) {
3312 		txq = port->txqs[queue];
3313 		err = mvpp2_txq_init(port, txq);
3314 		if (err)
3315 			goto err_cleanup;
3316 
3317 		/* Assign this queue to a CPU */
3318 		if (queue < num_possible_cpus())
3319 			netif_set_xps_queue(port->dev, cpumask_of(queue), queue);
3320 	}
3321 
3322 	if (port->has_tx_irqs) {
3323 		mvpp2_tx_time_coal_set(port);
3324 		for (queue = 0; queue < port->ntxqs; queue++) {
3325 			txq = port->txqs[queue];
3326 			mvpp2_tx_pkts_coal_set(port, txq);
3327 		}
3328 	}
3329 
3330 	on_each_cpu(mvpp2_txq_sent_counter_clear, port, 1);
3331 	return 0;
3332 
3333 err_cleanup:
3334 	mvpp2_cleanup_txqs(port);
3335 	return err;
3336 }
3337 
3338 /* The callback for per-port interrupt */
3339 static irqreturn_t mvpp2_isr(int irq, void *dev_id)
3340 {
3341 	struct mvpp2_queue_vector *qv = dev_id;
3342 
3343 	mvpp2_qvec_interrupt_disable(qv);
3344 
3345 	napi_schedule(&qv->napi);
3346 
3347 	return IRQ_HANDLED;
3348 }
3349 
3350 static void mvpp2_isr_handle_ptp_queue(struct mvpp2_port *port, int nq)
3351 {
3352 	struct skb_shared_hwtstamps shhwtstamps;
3353 	struct mvpp2_hwtstamp_queue *queue;
3354 	struct sk_buff *skb;
3355 	void __iomem *ptp_q;
3356 	unsigned int id;
3357 	u32 r0, r1, r2;
3358 
3359 	ptp_q = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id);
3360 	if (nq)
3361 		ptp_q += MVPP22_PTP_TX_Q1_R0 - MVPP22_PTP_TX_Q0_R0;
3362 
3363 	queue = &port->tx_hwtstamp_queue[nq];
3364 
3365 	while (1) {
3366 		r0 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R0) & 0xffff;
3367 		if (!r0)
3368 			break;
3369 
3370 		r1 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R1) & 0xffff;
3371 		r2 = readl_relaxed(ptp_q + MVPP22_PTP_TX_Q0_R2) & 0xffff;
3372 
3373 		id = (r0 >> 1) & 31;
3374 
3375 		skb = queue->skb[id];
3376 		queue->skb[id] = NULL;
3377 		if (skb) {
3378 			u32 ts = r2 << 19 | r1 << 3 | r0 >> 13;
3379 
3380 			mvpp22_tai_tstamp(port->priv->tai, ts, &shhwtstamps);
3381 			skb_tstamp_tx(skb, &shhwtstamps);
3382 			dev_kfree_skb_any(skb);
3383 		}
3384 	}
3385 }
3386 
3387 static void mvpp2_isr_handle_ptp(struct mvpp2_port *port)
3388 {
3389 	void __iomem *ptp;
3390 	u32 val;
3391 
3392 	ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id);
3393 	val = readl(ptp + MVPP22_PTP_INT_CAUSE);
3394 	if (val & MVPP22_PTP_INT_CAUSE_QUEUE0)
3395 		mvpp2_isr_handle_ptp_queue(port, 0);
3396 	if (val & MVPP22_PTP_INT_CAUSE_QUEUE1)
3397 		mvpp2_isr_handle_ptp_queue(port, 1);
3398 }
3399 
3400 static void mvpp2_isr_handle_link(struct mvpp2_port *port, bool link)
3401 {
3402 	struct net_device *dev = port->dev;
3403 
3404 	if (port->phylink) {
3405 		phylink_mac_change(port->phylink, link);
3406 		return;
3407 	}
3408 
3409 	if (!netif_running(dev))
3410 		return;
3411 
3412 	if (link) {
3413 		mvpp2_interrupts_enable(port);
3414 
3415 		mvpp2_egress_enable(port);
3416 		mvpp2_ingress_enable(port);
3417 		netif_carrier_on(dev);
3418 		netif_tx_wake_all_queues(dev);
3419 	} else {
3420 		netif_tx_stop_all_queues(dev);
3421 		netif_carrier_off(dev);
3422 		mvpp2_ingress_disable(port);
3423 		mvpp2_egress_disable(port);
3424 
3425 		mvpp2_interrupts_disable(port);
3426 	}
3427 }
3428 
3429 static void mvpp2_isr_handle_xlg(struct mvpp2_port *port)
3430 {
3431 	bool link;
3432 	u32 val;
3433 
3434 	val = readl(port->base + MVPP22_XLG_INT_STAT);
3435 	if (val & MVPP22_XLG_INT_STAT_LINK) {
3436 		val = readl(port->base + MVPP22_XLG_STATUS);
3437 		link = (val & MVPP22_XLG_STATUS_LINK_UP);
3438 		mvpp2_isr_handle_link(port, link);
3439 	}
3440 }
3441 
3442 static void mvpp2_isr_handle_gmac_internal(struct mvpp2_port *port)
3443 {
3444 	bool link;
3445 	u32 val;
3446 
3447 	if (phy_interface_mode_is_rgmii(port->phy_interface) ||
3448 	    phy_interface_mode_is_8023z(port->phy_interface) ||
3449 	    port->phy_interface == PHY_INTERFACE_MODE_SGMII) {
3450 		val = readl(port->base + MVPP22_GMAC_INT_STAT);
3451 		if (val & MVPP22_GMAC_INT_STAT_LINK) {
3452 			val = readl(port->base + MVPP2_GMAC_STATUS0);
3453 			link = (val & MVPP2_GMAC_STATUS0_LINK_UP);
3454 			mvpp2_isr_handle_link(port, link);
3455 		}
3456 	}
3457 }
3458 
3459 /* Per-port interrupt for link status changes */
3460 static irqreturn_t mvpp2_port_isr(int irq, void *dev_id)
3461 {
3462 	struct mvpp2_port *port = (struct mvpp2_port *)dev_id;
3463 	u32 val;
3464 
3465 	mvpp22_gop_mask_irq(port);
3466 
3467 	if (mvpp2_port_supports_xlg(port) &&
3468 	    mvpp2_is_xlg(port->phy_interface)) {
3469 		/* Check the external status register */
3470 		val = readl(port->base + MVPP22_XLG_EXT_INT_STAT);
3471 		if (val & MVPP22_XLG_EXT_INT_STAT_XLG)
3472 			mvpp2_isr_handle_xlg(port);
3473 		if (val & MVPP22_XLG_EXT_INT_STAT_PTP)
3474 			mvpp2_isr_handle_ptp(port);
3475 	} else {
3476 		/* If it's not the XLG, we must be using the GMAC.
3477 		 * Check the summary status.
3478 		 */
3479 		val = readl(port->base + MVPP22_GMAC_INT_SUM_STAT);
3480 		if (val & MVPP22_GMAC_INT_SUM_STAT_INTERNAL)
3481 			mvpp2_isr_handle_gmac_internal(port);
3482 		if (val & MVPP22_GMAC_INT_SUM_STAT_PTP)
3483 			mvpp2_isr_handle_ptp(port);
3484 	}
3485 
3486 	mvpp22_gop_unmask_irq(port);
3487 	return IRQ_HANDLED;
3488 }
3489 
3490 static enum hrtimer_restart mvpp2_hr_timer_cb(struct hrtimer *timer)
3491 {
3492 	struct net_device *dev;
3493 	struct mvpp2_port *port;
3494 	struct mvpp2_port_pcpu *port_pcpu;
3495 	unsigned int tx_todo, cause;
3496 
3497 	port_pcpu = container_of(timer, struct mvpp2_port_pcpu, tx_done_timer);
3498 	dev = port_pcpu->dev;
3499 
3500 	if (!netif_running(dev))
3501 		return HRTIMER_NORESTART;
3502 
3503 	port_pcpu->timer_scheduled = false;
3504 	port = netdev_priv(dev);
3505 
3506 	/* Process all the Tx queues */
3507 	cause = (1 << port->ntxqs) - 1;
3508 	tx_todo = mvpp2_tx_done(port, cause,
3509 				mvpp2_cpu_to_thread(port->priv, smp_processor_id()));
3510 
3511 	/* Set the timer in case not all the packets were processed */
3512 	if (tx_todo && !port_pcpu->timer_scheduled) {
3513 		port_pcpu->timer_scheduled = true;
3514 		hrtimer_forward_now(&port_pcpu->tx_done_timer,
3515 				    MVPP2_TXDONE_HRTIMER_PERIOD_NS);
3516 
3517 		return HRTIMER_RESTART;
3518 	}
3519 	return HRTIMER_NORESTART;
3520 }
3521 
3522 /* Main RX/TX processing routines */
3523 
3524 /* Display more error info */
3525 static void mvpp2_rx_error(struct mvpp2_port *port,
3526 			   struct mvpp2_rx_desc *rx_desc)
3527 {
3528 	u32 status = mvpp2_rxdesc_status_get(port, rx_desc);
3529 	size_t sz = mvpp2_rxdesc_size_get(port, rx_desc);
3530 	char *err_str = NULL;
3531 
3532 	switch (status & MVPP2_RXD_ERR_CODE_MASK) {
3533 	case MVPP2_RXD_ERR_CRC:
3534 		err_str = "crc";
3535 		break;
3536 	case MVPP2_RXD_ERR_OVERRUN:
3537 		err_str = "overrun";
3538 		break;
3539 	case MVPP2_RXD_ERR_RESOURCE:
3540 		err_str = "resource";
3541 		break;
3542 	}
3543 	if (err_str && net_ratelimit())
3544 		netdev_err(port->dev,
3545 			   "bad rx status %08x (%s error), size=%zu\n",
3546 			   status, err_str, sz);
3547 }
3548 
3549 /* Handle RX checksum offload */
3550 static int mvpp2_rx_csum(struct mvpp2_port *port, u32 status)
3551 {
3552 	if (((status & MVPP2_RXD_L3_IP4) &&
3553 	     !(status & MVPP2_RXD_IP4_HEADER_ERR)) ||
3554 	    (status & MVPP2_RXD_L3_IP6))
3555 		if (((status & MVPP2_RXD_L4_UDP) ||
3556 		     (status & MVPP2_RXD_L4_TCP)) &&
3557 		     (status & MVPP2_RXD_L4_CSUM_OK))
3558 			return CHECKSUM_UNNECESSARY;
3559 
3560 	return CHECKSUM_NONE;
3561 }
3562 
3563 /* Allocate a new skb and add it to BM pool */
3564 static int mvpp2_rx_refill(struct mvpp2_port *port,
3565 			   struct mvpp2_bm_pool *bm_pool,
3566 			   struct page_pool *page_pool, int pool)
3567 {
3568 	dma_addr_t dma_addr;
3569 	phys_addr_t phys_addr;
3570 	void *buf;
3571 
3572 	buf = mvpp2_buf_alloc(port, bm_pool, page_pool,
3573 			      &dma_addr, &phys_addr, GFP_ATOMIC);
3574 	if (!buf)
3575 		return -ENOMEM;
3576 
3577 	mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr);
3578 
3579 	return 0;
3580 }
3581 
3582 /* Handle tx checksum */
3583 static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb)
3584 {
3585 	if (skb->ip_summed == CHECKSUM_PARTIAL) {
3586 		int ip_hdr_len = 0;
3587 		u8 l4_proto;
3588 		__be16 l3_proto = vlan_get_protocol(skb);
3589 
3590 		if (l3_proto == htons(ETH_P_IP)) {
3591 			struct iphdr *ip4h = ip_hdr(skb);
3592 
3593 			/* Calculate IPv4 checksum and L4 checksum */
3594 			ip_hdr_len = ip4h->ihl;
3595 			l4_proto = ip4h->protocol;
3596 		} else if (l3_proto == htons(ETH_P_IPV6)) {
3597 			struct ipv6hdr *ip6h = ipv6_hdr(skb);
3598 
3599 			/* Read l4_protocol from one of IPv6 extra headers */
3600 			if (skb_network_header_len(skb) > 0)
3601 				ip_hdr_len = (skb_network_header_len(skb) >> 2);
3602 			l4_proto = ip6h->nexthdr;
3603 		} else {
3604 			return MVPP2_TXD_L4_CSUM_NOT;
3605 		}
3606 
3607 		return mvpp2_txq_desc_csum(skb_network_offset(skb),
3608 					   l3_proto, ip_hdr_len, l4_proto);
3609 	}
3610 
3611 	return MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE;
3612 }
3613 
3614 static void mvpp2_xdp_finish_tx(struct mvpp2_port *port, u16 txq_id, int nxmit, int nxmit_byte)
3615 {
3616 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
3617 	struct mvpp2_tx_queue *aggr_txq;
3618 	struct mvpp2_txq_pcpu *txq_pcpu;
3619 	struct mvpp2_tx_queue *txq;
3620 	struct netdev_queue *nq;
3621 
3622 	txq = port->txqs[txq_id];
3623 	txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
3624 	nq = netdev_get_tx_queue(port->dev, txq_id);
3625 	aggr_txq = &port->priv->aggr_txqs[thread];
3626 
3627 	txq_pcpu->reserved_num -= nxmit;
3628 	txq_pcpu->count += nxmit;
3629 	aggr_txq->count += nxmit;
3630 
3631 	/* Enable transmit */
3632 	wmb();
3633 	mvpp2_aggr_txq_pend_desc_add(port, nxmit);
3634 
3635 	if (txq_pcpu->count >= txq_pcpu->stop_threshold)
3636 		netif_tx_stop_queue(nq);
3637 
3638 	/* Finalize TX processing */
3639 	if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal)
3640 		mvpp2_txq_done(port, txq, txq_pcpu);
3641 }
3642 
3643 static int
3644 mvpp2_xdp_submit_frame(struct mvpp2_port *port, u16 txq_id,
3645 		       struct xdp_frame *xdpf, bool dma_map)
3646 {
3647 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
3648 	u32 tx_cmd = MVPP2_TXD_L4_CSUM_NOT | MVPP2_TXD_IP_CSUM_DISABLE |
3649 		     MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC;
3650 	enum mvpp2_tx_buf_type buf_type;
3651 	struct mvpp2_txq_pcpu *txq_pcpu;
3652 	struct mvpp2_tx_queue *aggr_txq;
3653 	struct mvpp2_tx_desc *tx_desc;
3654 	struct mvpp2_tx_queue *txq;
3655 	int ret = MVPP2_XDP_TX;
3656 	dma_addr_t dma_addr;
3657 
3658 	txq = port->txqs[txq_id];
3659 	txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
3660 	aggr_txq = &port->priv->aggr_txqs[thread];
3661 
3662 	/* Check number of available descriptors */
3663 	if (mvpp2_aggr_desc_num_check(port, aggr_txq, 1) ||
3664 	    mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, 1)) {
3665 		ret = MVPP2_XDP_DROPPED;
3666 		goto out;
3667 	}
3668 
3669 	/* Get a descriptor for the first part of the packet */
3670 	tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
3671 	mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
3672 	mvpp2_txdesc_size_set(port, tx_desc, xdpf->len);
3673 
3674 	if (dma_map) {
3675 		/* XDP_REDIRECT or AF_XDP */
3676 		dma_addr = dma_map_single(port->dev->dev.parent, xdpf->data,
3677 					  xdpf->len, DMA_TO_DEVICE);
3678 
3679 		if (unlikely(dma_mapping_error(port->dev->dev.parent, dma_addr))) {
3680 			mvpp2_txq_desc_put(txq);
3681 			ret = MVPP2_XDP_DROPPED;
3682 			goto out;
3683 		}
3684 
3685 		buf_type = MVPP2_TYPE_XDP_NDO;
3686 	} else {
3687 		/* XDP_TX */
3688 		struct page *page = virt_to_page(xdpf->data);
3689 
3690 		dma_addr = page_pool_get_dma_addr(page) +
3691 			   sizeof(*xdpf) + xdpf->headroom;
3692 		dma_sync_single_for_device(port->dev->dev.parent, dma_addr,
3693 					   xdpf->len, DMA_BIDIRECTIONAL);
3694 
3695 		buf_type = MVPP2_TYPE_XDP_TX;
3696 	}
3697 
3698 	mvpp2_txdesc_dma_addr_set(port, tx_desc, dma_addr);
3699 
3700 	mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd);
3701 	mvpp2_txq_inc_put(port, txq_pcpu, xdpf, tx_desc, buf_type);
3702 
3703 out:
3704 	return ret;
3705 }
3706 
3707 static int
3708 mvpp2_xdp_xmit_back(struct mvpp2_port *port, struct xdp_buff *xdp)
3709 {
3710 	struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);
3711 	struct xdp_frame *xdpf;
3712 	u16 txq_id;
3713 	int ret;
3714 
3715 	xdpf = xdp_convert_buff_to_frame(xdp);
3716 	if (unlikely(!xdpf))
3717 		return MVPP2_XDP_DROPPED;
3718 
3719 	/* The first of the TX queues are used for XPS,
3720 	 * the second half for XDP_TX
3721 	 */
3722 	txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2);
3723 
3724 	ret = mvpp2_xdp_submit_frame(port, txq_id, xdpf, false);
3725 	if (ret == MVPP2_XDP_TX) {
3726 		u64_stats_update_begin(&stats->syncp);
3727 		stats->tx_bytes += xdpf->len;
3728 		stats->tx_packets++;
3729 		stats->xdp_tx++;
3730 		u64_stats_update_end(&stats->syncp);
3731 
3732 		mvpp2_xdp_finish_tx(port, txq_id, 1, xdpf->len);
3733 	} else {
3734 		u64_stats_update_begin(&stats->syncp);
3735 		stats->xdp_tx_err++;
3736 		u64_stats_update_end(&stats->syncp);
3737 	}
3738 
3739 	return ret;
3740 }
3741 
3742 static int
3743 mvpp2_xdp_xmit(struct net_device *dev, int num_frame,
3744 	       struct xdp_frame **frames, u32 flags)
3745 {
3746 	struct mvpp2_port *port = netdev_priv(dev);
3747 	int i, nxmit_byte = 0, nxmit = 0;
3748 	struct mvpp2_pcpu_stats *stats;
3749 	u16 txq_id;
3750 	u32 ret;
3751 
3752 	if (unlikely(test_bit(0, &port->state)))
3753 		return -ENETDOWN;
3754 
3755 	if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
3756 		return -EINVAL;
3757 
3758 	/* The first of the TX queues are used for XPS,
3759 	 * the second half for XDP_TX
3760 	 */
3761 	txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2);
3762 
3763 	for (i = 0; i < num_frame; i++) {
3764 		ret = mvpp2_xdp_submit_frame(port, txq_id, frames[i], true);
3765 		if (ret != MVPP2_XDP_TX)
3766 			break;
3767 
3768 		nxmit_byte += frames[i]->len;
3769 		nxmit++;
3770 	}
3771 
3772 	if (likely(nxmit > 0))
3773 		mvpp2_xdp_finish_tx(port, txq_id, nxmit, nxmit_byte);
3774 
3775 	stats = this_cpu_ptr(port->stats);
3776 	u64_stats_update_begin(&stats->syncp);
3777 	stats->tx_bytes += nxmit_byte;
3778 	stats->tx_packets += nxmit;
3779 	stats->xdp_xmit += nxmit;
3780 	stats->xdp_xmit_err += num_frame - nxmit;
3781 	u64_stats_update_end(&stats->syncp);
3782 
3783 	return nxmit;
3784 }
3785 
3786 static int
3787 mvpp2_run_xdp(struct mvpp2_port *port, struct bpf_prog *prog,
3788 	      struct xdp_buff *xdp, struct page_pool *pp,
3789 	      struct mvpp2_pcpu_stats *stats)
3790 {
3791 	unsigned int len, sync, err;
3792 	struct page *page;
3793 	u32 ret, act;
3794 
3795 	len = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM;
3796 	act = bpf_prog_run_xdp(prog, xdp);
3797 
3798 	/* Due xdp_adjust_tail: DMA sync for_device cover max len CPU touch */
3799 	sync = xdp->data_end - xdp->data_hard_start - MVPP2_SKB_HEADROOM;
3800 	sync = max(sync, len);
3801 
3802 	switch (act) {
3803 	case XDP_PASS:
3804 		stats->xdp_pass++;
3805 		ret = MVPP2_XDP_PASS;
3806 		break;
3807 	case XDP_REDIRECT:
3808 		err = xdp_do_redirect(port->dev, xdp, prog);
3809 		if (unlikely(err)) {
3810 			ret = MVPP2_XDP_DROPPED;
3811 			page = virt_to_head_page(xdp->data);
3812 			page_pool_put_page(pp, page, sync, true);
3813 		} else {
3814 			ret = MVPP2_XDP_REDIR;
3815 			stats->xdp_redirect++;
3816 		}
3817 		break;
3818 	case XDP_TX:
3819 		ret = mvpp2_xdp_xmit_back(port, xdp);
3820 		if (ret != MVPP2_XDP_TX) {
3821 			page = virt_to_head_page(xdp->data);
3822 			page_pool_put_page(pp, page, sync, true);
3823 		}
3824 		break;
3825 	default:
3826 		bpf_warn_invalid_xdp_action(port->dev, prog, act);
3827 		fallthrough;
3828 	case XDP_ABORTED:
3829 		trace_xdp_exception(port->dev, prog, act);
3830 		fallthrough;
3831 	case XDP_DROP:
3832 		page = virt_to_head_page(xdp->data);
3833 		page_pool_put_page(pp, page, sync, true);
3834 		ret = MVPP2_XDP_DROPPED;
3835 		stats->xdp_drop++;
3836 		break;
3837 	}
3838 
3839 	return ret;
3840 }
3841 
3842 static void mvpp2_buff_hdr_pool_put(struct mvpp2_port *port, struct mvpp2_rx_desc *rx_desc,
3843 				    int pool, u32 rx_status)
3844 {
3845 	phys_addr_t phys_addr, phys_addr_next;
3846 	dma_addr_t dma_addr, dma_addr_next;
3847 	struct mvpp2_buff_hdr *buff_hdr;
3848 
3849 	phys_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc);
3850 	dma_addr = mvpp2_rxdesc_cookie_get(port, rx_desc);
3851 
3852 	do {
3853 		buff_hdr = (struct mvpp2_buff_hdr *)phys_to_virt(phys_addr);
3854 
3855 		phys_addr_next = le32_to_cpu(buff_hdr->next_phys_addr);
3856 		dma_addr_next = le32_to_cpu(buff_hdr->next_dma_addr);
3857 
3858 		if (port->priv->hw_version >= MVPP22) {
3859 			phys_addr_next |= ((u64)buff_hdr->next_phys_addr_high << 32);
3860 			dma_addr_next |= ((u64)buff_hdr->next_dma_addr_high << 32);
3861 		}
3862 
3863 		mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr);
3864 
3865 		phys_addr = phys_addr_next;
3866 		dma_addr = dma_addr_next;
3867 
3868 	} while (!MVPP2_B_HDR_INFO_IS_LAST(le16_to_cpu(buff_hdr->info)));
3869 }
3870 
3871 /* Main rx processing */
3872 static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
3873 		    int rx_todo, struct mvpp2_rx_queue *rxq)
3874 {
3875 	struct net_device *dev = port->dev;
3876 	struct mvpp2_pcpu_stats ps = {};
3877 	enum dma_data_direction dma_dir;
3878 	struct bpf_prog *xdp_prog;
3879 	struct xdp_buff xdp;
3880 	int rx_received;
3881 	int rx_done = 0;
3882 	u32 xdp_ret = 0;
3883 
3884 	xdp_prog = READ_ONCE(port->xdp_prog);
3885 
3886 	/* Get number of received packets and clamp the to-do */
3887 	rx_received = mvpp2_rxq_received(port, rxq->id);
3888 	if (rx_todo > rx_received)
3889 		rx_todo = rx_received;
3890 
3891 	while (rx_done < rx_todo) {
3892 		struct mvpp2_rx_desc *rx_desc = mvpp2_rxq_next_desc_get(rxq);
3893 		struct mvpp2_bm_pool *bm_pool;
3894 		struct page_pool *pp = NULL;
3895 		struct sk_buff *skb;
3896 		unsigned int frag_size;
3897 		dma_addr_t dma_addr;
3898 		phys_addr_t phys_addr;
3899 		u32 rx_status, timestamp;
3900 		int pool, rx_bytes, err, ret;
3901 		struct page *page;
3902 		void *data;
3903 
3904 		phys_addr = mvpp2_rxdesc_cookie_get(port, rx_desc);
3905 		data = (void *)phys_to_virt(phys_addr);
3906 		page = virt_to_page(data);
3907 		prefetch(page);
3908 
3909 		rx_done++;
3910 		rx_status = mvpp2_rxdesc_status_get(port, rx_desc);
3911 		rx_bytes = mvpp2_rxdesc_size_get(port, rx_desc);
3912 		rx_bytes -= MVPP2_MH_SIZE;
3913 		dma_addr = mvpp2_rxdesc_dma_addr_get(port, rx_desc);
3914 
3915 		pool = (rx_status & MVPP2_RXD_BM_POOL_ID_MASK) >>
3916 			MVPP2_RXD_BM_POOL_ID_OFFS;
3917 		bm_pool = &port->priv->bm_pools[pool];
3918 
3919 		if (port->priv->percpu_pools) {
3920 			pp = port->priv->page_pool[pool];
3921 			dma_dir = page_pool_get_dma_dir(pp);
3922 		} else {
3923 			dma_dir = DMA_FROM_DEVICE;
3924 		}
3925 
3926 		dma_sync_single_for_cpu(dev->dev.parent, dma_addr,
3927 					rx_bytes + MVPP2_MH_SIZE,
3928 					dma_dir);
3929 
3930 		/* Buffer header not supported */
3931 		if (rx_status & MVPP2_RXD_BUF_HDR)
3932 			goto err_drop_frame;
3933 
3934 		/* In case of an error, release the requested buffer pointer
3935 		 * to the Buffer Manager. This request process is controlled
3936 		 * by the hardware, and the information about the buffer is
3937 		 * comprised by the RX descriptor.
3938 		 */
3939 		if (rx_status & MVPP2_RXD_ERR_SUMMARY)
3940 			goto err_drop_frame;
3941 
3942 		/* Prefetch header */
3943 		prefetch(data + MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM);
3944 
3945 		if (bm_pool->frag_size > PAGE_SIZE)
3946 			frag_size = 0;
3947 		else
3948 			frag_size = bm_pool->frag_size;
3949 
3950 		if (xdp_prog) {
3951 			struct xdp_rxq_info *xdp_rxq;
3952 
3953 			if (bm_pool->pkt_size == MVPP2_BM_SHORT_PKT_SIZE)
3954 				xdp_rxq = &rxq->xdp_rxq_short;
3955 			else
3956 				xdp_rxq = &rxq->xdp_rxq_long;
3957 
3958 			xdp_init_buff(&xdp, PAGE_SIZE, xdp_rxq);
3959 			xdp_prepare_buff(&xdp, data,
3960 					 MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM,
3961 					 rx_bytes, false);
3962 
3963 			ret = mvpp2_run_xdp(port, xdp_prog, &xdp, pp, &ps);
3964 
3965 			if (ret) {
3966 				xdp_ret |= ret;
3967 				err = mvpp2_rx_refill(port, bm_pool, pp, pool);
3968 				if (err) {
3969 					netdev_err(port->dev, "failed to refill BM pools\n");
3970 					goto err_drop_frame;
3971 				}
3972 
3973 				ps.rx_packets++;
3974 				ps.rx_bytes += rx_bytes;
3975 				continue;
3976 			}
3977 		}
3978 
3979 		skb = build_skb(data, frag_size);
3980 		if (!skb) {
3981 			netdev_warn(port->dev, "skb build failed\n");
3982 			goto err_drop_frame;
3983 		}
3984 
3985 		/* If we have RX hardware timestamping enabled, grab the
3986 		 * timestamp from the queue and convert.
3987 		 */
3988 		if (mvpp22_rx_hwtstamping(port)) {
3989 			timestamp = le32_to_cpu(rx_desc->pp22.timestamp);
3990 			mvpp22_tai_tstamp(port->priv->tai, timestamp,
3991 					 skb_hwtstamps(skb));
3992 		}
3993 
3994 		err = mvpp2_rx_refill(port, bm_pool, pp, pool);
3995 		if (err) {
3996 			netdev_err(port->dev, "failed to refill BM pools\n");
3997 			dev_kfree_skb_any(skb);
3998 			goto err_drop_frame;
3999 		}
4000 
4001 		if (pp)
4002 			skb_mark_for_recycle(skb);
4003 		else
4004 			dma_unmap_single_attrs(dev->dev.parent, dma_addr,
4005 					       bm_pool->buf_size, DMA_FROM_DEVICE,
4006 					       DMA_ATTR_SKIP_CPU_SYNC);
4007 
4008 		ps.rx_packets++;
4009 		ps.rx_bytes += rx_bytes;
4010 
4011 		skb_reserve(skb, MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM);
4012 		skb_put(skb, rx_bytes);
4013 		skb->ip_summed = mvpp2_rx_csum(port, rx_status);
4014 		skb->protocol = eth_type_trans(skb, dev);
4015 
4016 		napi_gro_receive(napi, skb);
4017 		continue;
4018 
4019 err_drop_frame:
4020 		dev->stats.rx_errors++;
4021 		mvpp2_rx_error(port, rx_desc);
4022 		/* Return the buffer to the pool */
4023 		if (rx_status & MVPP2_RXD_BUF_HDR)
4024 			mvpp2_buff_hdr_pool_put(port, rx_desc, pool, rx_status);
4025 		else
4026 			mvpp2_bm_pool_put(port, pool, dma_addr, phys_addr);
4027 	}
4028 
4029 	if (xdp_ret & MVPP2_XDP_REDIR)
4030 		xdp_do_flush_map();
4031 
4032 	if (ps.rx_packets) {
4033 		struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);
4034 
4035 		u64_stats_update_begin(&stats->syncp);
4036 		stats->rx_packets += ps.rx_packets;
4037 		stats->rx_bytes   += ps.rx_bytes;
4038 		/* xdp */
4039 		stats->xdp_redirect += ps.xdp_redirect;
4040 		stats->xdp_pass += ps.xdp_pass;
4041 		stats->xdp_drop += ps.xdp_drop;
4042 		u64_stats_update_end(&stats->syncp);
4043 	}
4044 
4045 	/* Update Rx queue management counters */
4046 	wmb();
4047 	mvpp2_rxq_status_update(port, rxq->id, rx_done, rx_done);
4048 
4049 	return rx_todo;
4050 }
4051 
4052 static inline void
4053 tx_desc_unmap_put(struct mvpp2_port *port, struct mvpp2_tx_queue *txq,
4054 		  struct mvpp2_tx_desc *desc)
4055 {
4056 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
4057 	struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
4058 
4059 	dma_addr_t buf_dma_addr =
4060 		mvpp2_txdesc_dma_addr_get(port, desc);
4061 	size_t buf_sz =
4062 		mvpp2_txdesc_size_get(port, desc);
4063 	if (!IS_TSO_HEADER(txq_pcpu, buf_dma_addr))
4064 		dma_unmap_single(port->dev->dev.parent, buf_dma_addr,
4065 				 buf_sz, DMA_TO_DEVICE);
4066 	mvpp2_txq_desc_put(txq);
4067 }
4068 
4069 static void mvpp2_txdesc_clear_ptp(struct mvpp2_port *port,
4070 				   struct mvpp2_tx_desc *desc)
4071 {
4072 	/* We only need to clear the low bits */
4073 	if (port->priv->hw_version >= MVPP22)
4074 		desc->pp22.ptp_descriptor &=
4075 			cpu_to_le32(~MVPP22_PTP_DESC_MASK_LOW);
4076 }
4077 
4078 static bool mvpp2_tx_hw_tstamp(struct mvpp2_port *port,
4079 			       struct mvpp2_tx_desc *tx_desc,
4080 			       struct sk_buff *skb)
4081 {
4082 	struct mvpp2_hwtstamp_queue *queue;
4083 	unsigned int mtype, type, i;
4084 	struct ptp_header *hdr;
4085 	u64 ptpdesc;
4086 
4087 	if (port->priv->hw_version == MVPP21 ||
4088 	    port->tx_hwtstamp_type == HWTSTAMP_TX_OFF)
4089 		return false;
4090 
4091 	type = ptp_classify_raw(skb);
4092 	if (!type)
4093 		return false;
4094 
4095 	hdr = ptp_parse_header(skb, type);
4096 	if (!hdr)
4097 		return false;
4098 
4099 	skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
4100 
4101 	ptpdesc = MVPP22_PTP_MACTIMESTAMPINGEN |
4102 		  MVPP22_PTP_ACTION_CAPTURE;
4103 	queue = &port->tx_hwtstamp_queue[0];
4104 
4105 	switch (type & PTP_CLASS_VMASK) {
4106 	case PTP_CLASS_V1:
4107 		ptpdesc |= MVPP22_PTP_PACKETFORMAT(MVPP22_PTP_PKT_FMT_PTPV1);
4108 		break;
4109 
4110 	case PTP_CLASS_V2:
4111 		ptpdesc |= MVPP22_PTP_PACKETFORMAT(MVPP22_PTP_PKT_FMT_PTPV2);
4112 		mtype = hdr->tsmt & 15;
4113 		/* Direct PTP Sync messages to queue 1 */
4114 		if (mtype == 0) {
4115 			ptpdesc |= MVPP22_PTP_TIMESTAMPQUEUESELECT;
4116 			queue = &port->tx_hwtstamp_queue[1];
4117 		}
4118 		break;
4119 	}
4120 
4121 	/* Take a reference on the skb and insert into our queue */
4122 	i = queue->next;
4123 	queue->next = (i + 1) & 31;
4124 	if (queue->skb[i])
4125 		dev_kfree_skb_any(queue->skb[i]);
4126 	queue->skb[i] = skb_get(skb);
4127 
4128 	ptpdesc |= MVPP22_PTP_TIMESTAMPENTRYID(i);
4129 
4130 	/*
4131 	 * 3:0		- PTPAction
4132 	 * 6:4		- PTPPacketFormat
4133 	 * 7		- PTP_CF_WraparoundCheckEn
4134 	 * 9:8		- IngressTimestampSeconds[1:0]
4135 	 * 10		- Reserved
4136 	 * 11		- MACTimestampingEn
4137 	 * 17:12	- PTP_TimestampQueueEntryID[5:0]
4138 	 * 18		- PTPTimestampQueueSelect
4139 	 * 19		- UDPChecksumUpdateEn
4140 	 * 27:20	- TimestampOffset
4141 	 *			PTP, NTPTransmit, OWAMP/TWAMP - L3 to PTP header
4142 	 *			NTPTs, Y.1731 - L3 to timestamp entry
4143 	 * 35:28	- UDP Checksum Offset
4144 	 *
4145 	 * stored in tx descriptor bits 75:64 (11:0) and 191:168 (35:12)
4146 	 */
4147 	tx_desc->pp22.ptp_descriptor &=
4148 		cpu_to_le32(~MVPP22_PTP_DESC_MASK_LOW);
4149 	tx_desc->pp22.ptp_descriptor |=
4150 		cpu_to_le32(ptpdesc & MVPP22_PTP_DESC_MASK_LOW);
4151 	tx_desc->pp22.buf_dma_addr_ptp &= cpu_to_le64(~0xffffff0000000000ULL);
4152 	tx_desc->pp22.buf_dma_addr_ptp |= cpu_to_le64((ptpdesc >> 12) << 40);
4153 
4154 	return true;
4155 }
4156 
4157 /* Handle tx fragmentation processing */
4158 static int mvpp2_tx_frag_process(struct mvpp2_port *port, struct sk_buff *skb,
4159 				 struct mvpp2_tx_queue *aggr_txq,
4160 				 struct mvpp2_tx_queue *txq)
4161 {
4162 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
4163 	struct mvpp2_txq_pcpu *txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
4164 	struct mvpp2_tx_desc *tx_desc;
4165 	int i;
4166 	dma_addr_t buf_dma_addr;
4167 
4168 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
4169 		skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
4170 		void *addr = skb_frag_address(frag);
4171 
4172 		tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
4173 		mvpp2_txdesc_clear_ptp(port, tx_desc);
4174 		mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
4175 		mvpp2_txdesc_size_set(port, tx_desc, skb_frag_size(frag));
4176 
4177 		buf_dma_addr = dma_map_single(port->dev->dev.parent, addr,
4178 					      skb_frag_size(frag),
4179 					      DMA_TO_DEVICE);
4180 		if (dma_mapping_error(port->dev->dev.parent, buf_dma_addr)) {
4181 			mvpp2_txq_desc_put(txq);
4182 			goto cleanup;
4183 		}
4184 
4185 		mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);
4186 
4187 		if (i == (skb_shinfo(skb)->nr_frags - 1)) {
4188 			/* Last descriptor */
4189 			mvpp2_txdesc_cmd_set(port, tx_desc,
4190 					     MVPP2_TXD_L_DESC);
4191 			mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB);
4192 		} else {
4193 			/* Descriptor in the middle: Not First, Not Last */
4194 			mvpp2_txdesc_cmd_set(port, tx_desc, 0);
4195 			mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB);
4196 		}
4197 	}
4198 
4199 	return 0;
4200 cleanup:
4201 	/* Release all descriptors that were used to map fragments of
4202 	 * this packet, as well as the corresponding DMA mappings
4203 	 */
4204 	for (i = i - 1; i >= 0; i--) {
4205 		tx_desc = txq->descs + i;
4206 		tx_desc_unmap_put(port, txq, tx_desc);
4207 	}
4208 
4209 	return -ENOMEM;
4210 }
4211 
4212 static inline void mvpp2_tso_put_hdr(struct sk_buff *skb,
4213 				     struct net_device *dev,
4214 				     struct mvpp2_tx_queue *txq,
4215 				     struct mvpp2_tx_queue *aggr_txq,
4216 				     struct mvpp2_txq_pcpu *txq_pcpu,
4217 				     int hdr_sz)
4218 {
4219 	struct mvpp2_port *port = netdev_priv(dev);
4220 	struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
4221 	dma_addr_t addr;
4222 
4223 	mvpp2_txdesc_clear_ptp(port, tx_desc);
4224 	mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
4225 	mvpp2_txdesc_size_set(port, tx_desc, hdr_sz);
4226 
4227 	addr = txq_pcpu->tso_headers_dma +
4228 	       txq_pcpu->txq_put_index * TSO_HEADER_SIZE;
4229 	mvpp2_txdesc_dma_addr_set(port, tx_desc, addr);
4230 
4231 	mvpp2_txdesc_cmd_set(port, tx_desc, mvpp2_skb_tx_csum(port, skb) |
4232 					    MVPP2_TXD_F_DESC |
4233 					    MVPP2_TXD_PADDING_DISABLE);
4234 	mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB);
4235 }
4236 
4237 static inline int mvpp2_tso_put_data(struct sk_buff *skb,
4238 				     struct net_device *dev, struct tso_t *tso,
4239 				     struct mvpp2_tx_queue *txq,
4240 				     struct mvpp2_tx_queue *aggr_txq,
4241 				     struct mvpp2_txq_pcpu *txq_pcpu,
4242 				     int sz, bool left, bool last)
4243 {
4244 	struct mvpp2_port *port = netdev_priv(dev);
4245 	struct mvpp2_tx_desc *tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
4246 	dma_addr_t buf_dma_addr;
4247 
4248 	mvpp2_txdesc_clear_ptp(port, tx_desc);
4249 	mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
4250 	mvpp2_txdesc_size_set(port, tx_desc, sz);
4251 
4252 	buf_dma_addr = dma_map_single(dev->dev.parent, tso->data, sz,
4253 				      DMA_TO_DEVICE);
4254 	if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) {
4255 		mvpp2_txq_desc_put(txq);
4256 		return -ENOMEM;
4257 	}
4258 
4259 	mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);
4260 
4261 	if (!left) {
4262 		mvpp2_txdesc_cmd_set(port, tx_desc, MVPP2_TXD_L_DESC);
4263 		if (last) {
4264 			mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB);
4265 			return 0;
4266 		}
4267 	} else {
4268 		mvpp2_txdesc_cmd_set(port, tx_desc, 0);
4269 	}
4270 
4271 	mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB);
4272 	return 0;
4273 }
4274 
4275 static int mvpp2_tx_tso(struct sk_buff *skb, struct net_device *dev,
4276 			struct mvpp2_tx_queue *txq,
4277 			struct mvpp2_tx_queue *aggr_txq,
4278 			struct mvpp2_txq_pcpu *txq_pcpu)
4279 {
4280 	struct mvpp2_port *port = netdev_priv(dev);
4281 	int hdr_sz, i, len, descs = 0;
4282 	struct tso_t tso;
4283 
4284 	/* Check number of available descriptors */
4285 	if (mvpp2_aggr_desc_num_check(port, aggr_txq, tso_count_descs(skb)) ||
4286 	    mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu,
4287 					     tso_count_descs(skb)))
4288 		return 0;
4289 
4290 	hdr_sz = tso_start(skb, &tso);
4291 
4292 	len = skb->len - hdr_sz;
4293 	while (len > 0) {
4294 		int left = min_t(int, skb_shinfo(skb)->gso_size, len);
4295 		char *hdr = txq_pcpu->tso_headers +
4296 			    txq_pcpu->txq_put_index * TSO_HEADER_SIZE;
4297 
4298 		len -= left;
4299 		descs++;
4300 
4301 		tso_build_hdr(skb, hdr, &tso, left, len == 0);
4302 		mvpp2_tso_put_hdr(skb, dev, txq, aggr_txq, txq_pcpu, hdr_sz);
4303 
4304 		while (left > 0) {
4305 			int sz = min_t(int, tso.size, left);
4306 			left -= sz;
4307 			descs++;
4308 
4309 			if (mvpp2_tso_put_data(skb, dev, &tso, txq, aggr_txq,
4310 					       txq_pcpu, sz, left, len == 0))
4311 				goto release;
4312 			tso_build_data(skb, &tso, sz);
4313 		}
4314 	}
4315 
4316 	return descs;
4317 
4318 release:
4319 	for (i = descs - 1; i >= 0; i--) {
4320 		struct mvpp2_tx_desc *tx_desc = txq->descs + i;
4321 		tx_desc_unmap_put(port, txq, tx_desc);
4322 	}
4323 	return 0;
4324 }
4325 
4326 /* Main tx processing */
4327 static netdev_tx_t mvpp2_tx(struct sk_buff *skb, struct net_device *dev)
4328 {
4329 	struct mvpp2_port *port = netdev_priv(dev);
4330 	struct mvpp2_tx_queue *txq, *aggr_txq;
4331 	struct mvpp2_txq_pcpu *txq_pcpu;
4332 	struct mvpp2_tx_desc *tx_desc;
4333 	dma_addr_t buf_dma_addr;
4334 	unsigned long flags = 0;
4335 	unsigned int thread;
4336 	int frags = 0;
4337 	u16 txq_id;
4338 	u32 tx_cmd;
4339 
4340 	thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
4341 
4342 	txq_id = skb_get_queue_mapping(skb);
4343 	txq = port->txqs[txq_id];
4344 	txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
4345 	aggr_txq = &port->priv->aggr_txqs[thread];
4346 
4347 	if (test_bit(thread, &port->priv->lock_map))
4348 		spin_lock_irqsave(&port->tx_lock[thread], flags);
4349 
4350 	if (skb_is_gso(skb)) {
4351 		frags = mvpp2_tx_tso(skb, dev, txq, aggr_txq, txq_pcpu);
4352 		goto out;
4353 	}
4354 	frags = skb_shinfo(skb)->nr_frags + 1;
4355 
4356 	/* Check number of available descriptors */
4357 	if (mvpp2_aggr_desc_num_check(port, aggr_txq, frags) ||
4358 	    mvpp2_txq_reserved_desc_num_proc(port, txq, txq_pcpu, frags)) {
4359 		frags = 0;
4360 		goto out;
4361 	}
4362 
4363 	/* Get a descriptor for the first part of the packet */
4364 	tx_desc = mvpp2_txq_next_desc_get(aggr_txq);
4365 	if (!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ||
4366 	    !mvpp2_tx_hw_tstamp(port, tx_desc, skb))
4367 		mvpp2_txdesc_clear_ptp(port, tx_desc);
4368 	mvpp2_txdesc_txq_set(port, tx_desc, txq->id);
4369 	mvpp2_txdesc_size_set(port, tx_desc, skb_headlen(skb));
4370 
4371 	buf_dma_addr = dma_map_single(dev->dev.parent, skb->data,
4372 				      skb_headlen(skb), DMA_TO_DEVICE);
4373 	if (unlikely(dma_mapping_error(dev->dev.parent, buf_dma_addr))) {
4374 		mvpp2_txq_desc_put(txq);
4375 		frags = 0;
4376 		goto out;
4377 	}
4378 
4379 	mvpp2_txdesc_dma_addr_set(port, tx_desc, buf_dma_addr);
4380 
4381 	tx_cmd = mvpp2_skb_tx_csum(port, skb);
4382 
4383 	if (frags == 1) {
4384 		/* First and Last descriptor */
4385 		tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_L_DESC;
4386 		mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd);
4387 		mvpp2_txq_inc_put(port, txq_pcpu, skb, tx_desc, MVPP2_TYPE_SKB);
4388 	} else {
4389 		/* First but not Last */
4390 		tx_cmd |= MVPP2_TXD_F_DESC | MVPP2_TXD_PADDING_DISABLE;
4391 		mvpp2_txdesc_cmd_set(port, tx_desc, tx_cmd);
4392 		mvpp2_txq_inc_put(port, txq_pcpu, NULL, tx_desc, MVPP2_TYPE_SKB);
4393 
4394 		/* Continue with other skb fragments */
4395 		if (mvpp2_tx_frag_process(port, skb, aggr_txq, txq)) {
4396 			tx_desc_unmap_put(port, txq, tx_desc);
4397 			frags = 0;
4398 		}
4399 	}
4400 
4401 out:
4402 	if (frags > 0) {
4403 		struct mvpp2_pcpu_stats *stats = per_cpu_ptr(port->stats, thread);
4404 		struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id);
4405 
4406 		txq_pcpu->reserved_num -= frags;
4407 		txq_pcpu->count += frags;
4408 		aggr_txq->count += frags;
4409 
4410 		/* Enable transmit */
4411 		wmb();
4412 		mvpp2_aggr_txq_pend_desc_add(port, frags);
4413 
4414 		if (txq_pcpu->count >= txq_pcpu->stop_threshold)
4415 			netif_tx_stop_queue(nq);
4416 
4417 		u64_stats_update_begin(&stats->syncp);
4418 		stats->tx_packets++;
4419 		stats->tx_bytes += skb->len;
4420 		u64_stats_update_end(&stats->syncp);
4421 	} else {
4422 		dev->stats.tx_dropped++;
4423 		dev_kfree_skb_any(skb);
4424 	}
4425 
4426 	/* Finalize TX processing */
4427 	if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal)
4428 		mvpp2_txq_done(port, txq, txq_pcpu);
4429 
4430 	/* Set the timer in case not all frags were processed */
4431 	if (!port->has_tx_irqs && txq_pcpu->count <= frags &&
4432 	    txq_pcpu->count > 0) {
4433 		struct mvpp2_port_pcpu *port_pcpu = per_cpu_ptr(port->pcpu, thread);
4434 
4435 		if (!port_pcpu->timer_scheduled) {
4436 			port_pcpu->timer_scheduled = true;
4437 			hrtimer_start(&port_pcpu->tx_done_timer,
4438 				      MVPP2_TXDONE_HRTIMER_PERIOD_NS,
4439 				      HRTIMER_MODE_REL_PINNED_SOFT);
4440 		}
4441 	}
4442 
4443 	if (test_bit(thread, &port->priv->lock_map))
4444 		spin_unlock_irqrestore(&port->tx_lock[thread], flags);
4445 
4446 	return NETDEV_TX_OK;
4447 }
4448 
4449 static inline void mvpp2_cause_error(struct net_device *dev, int cause)
4450 {
4451 	if (cause & MVPP2_CAUSE_FCS_ERR_MASK)
4452 		netdev_err(dev, "FCS error\n");
4453 	if (cause & MVPP2_CAUSE_RX_FIFO_OVERRUN_MASK)
4454 		netdev_err(dev, "rx fifo overrun error\n");
4455 	if (cause & MVPP2_CAUSE_TX_FIFO_UNDERRUN_MASK)
4456 		netdev_err(dev, "tx fifo underrun error\n");
4457 }
4458 
4459 static int mvpp2_poll(struct napi_struct *napi, int budget)
4460 {
4461 	u32 cause_rx_tx, cause_rx, cause_tx, cause_misc;
4462 	int rx_done = 0;
4463 	struct mvpp2_port *port = netdev_priv(napi->dev);
4464 	struct mvpp2_queue_vector *qv;
4465 	unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
4466 
4467 	qv = container_of(napi, struct mvpp2_queue_vector, napi);
4468 
4469 	/* Rx/Tx cause register
4470 	 *
4471 	 * Bits 0-15: each bit indicates received packets on the Rx queue
4472 	 * (bit 0 is for Rx queue 0).
4473 	 *
4474 	 * Bits 16-23: each bit indicates transmitted packets on the Tx queue
4475 	 * (bit 16 is for Tx queue 0).
4476 	 *
4477 	 * Each CPU has its own Rx/Tx cause register
4478 	 */
4479 	cause_rx_tx = mvpp2_thread_read_relaxed(port->priv, qv->sw_thread_id,
4480 						MVPP2_ISR_RX_TX_CAUSE_REG(port->id));
4481 
4482 	cause_misc = cause_rx_tx & MVPP2_CAUSE_MISC_SUM_MASK;
4483 	if (cause_misc) {
4484 		mvpp2_cause_error(port->dev, cause_misc);
4485 
4486 		/* Clear the cause register */
4487 		mvpp2_write(port->priv, MVPP2_ISR_MISC_CAUSE_REG, 0);
4488 		mvpp2_thread_write(port->priv, thread,
4489 				   MVPP2_ISR_RX_TX_CAUSE_REG(port->id),
4490 				   cause_rx_tx & ~MVPP2_CAUSE_MISC_SUM_MASK);
4491 	}
4492 
4493 	if (port->has_tx_irqs) {
4494 		cause_tx = cause_rx_tx & MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_MASK;
4495 		if (cause_tx) {
4496 			cause_tx >>= MVPP2_CAUSE_TXQ_OCCUP_DESC_ALL_OFFSET;
4497 			mvpp2_tx_done(port, cause_tx, qv->sw_thread_id);
4498 		}
4499 	}
4500 
4501 	/* Process RX packets */
4502 	cause_rx = cause_rx_tx &
4503 		   MVPP2_CAUSE_RXQ_OCCUP_DESC_ALL_MASK(port->priv->hw_version);
4504 	cause_rx <<= qv->first_rxq;
4505 	cause_rx |= qv->pending_cause_rx;
4506 	while (cause_rx && budget > 0) {
4507 		int count;
4508 		struct mvpp2_rx_queue *rxq;
4509 
4510 		rxq = mvpp2_get_rx_queue(port, cause_rx);
4511 		if (!rxq)
4512 			break;
4513 
4514 		count = mvpp2_rx(port, napi, budget, rxq);
4515 		rx_done += count;
4516 		budget -= count;
4517 		if (budget > 0) {
4518 			/* Clear the bit associated to this Rx queue
4519 			 * so that next iteration will continue from
4520 			 * the next Rx queue.
4521 			 */
4522 			cause_rx &= ~(1 << rxq->logic_rxq);
4523 		}
4524 	}
4525 
4526 	if (budget > 0) {
4527 		cause_rx = 0;
4528 		napi_complete_done(napi, rx_done);
4529 
4530 		mvpp2_qvec_interrupt_enable(qv);
4531 	}
4532 	qv->pending_cause_rx = cause_rx;
4533 	return rx_done;
4534 }
4535 
4536 static void mvpp22_mode_reconfigure(struct mvpp2_port *port,
4537 				    phy_interface_t interface)
4538 {
4539 	u32 ctrl3;
4540 
4541 	/* Set the GMAC & XLG MAC in reset */
4542 	mvpp2_mac_reset_assert(port);
4543 
4544 	/* Set the MPCS and XPCS in reset */
4545 	mvpp22_pcs_reset_assert(port);
4546 
4547 	/* comphy reconfiguration */
4548 	mvpp22_comphy_init(port, interface);
4549 
4550 	/* gop reconfiguration */
4551 	mvpp22_gop_init(port, interface);
4552 
4553 	mvpp22_pcs_reset_deassert(port, interface);
4554 
4555 	if (mvpp2_port_supports_xlg(port)) {
4556 		ctrl3 = readl(port->base + MVPP22_XLG_CTRL3_REG);
4557 		ctrl3 &= ~MVPP22_XLG_CTRL3_MACMODESELECT_MASK;
4558 
4559 		if (mvpp2_is_xlg(interface))
4560 			ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_10G;
4561 		else
4562 			ctrl3 |= MVPP22_XLG_CTRL3_MACMODESELECT_GMAC;
4563 
4564 		writel(ctrl3, port->base + MVPP22_XLG_CTRL3_REG);
4565 	}
4566 
4567 	if (mvpp2_port_supports_xlg(port) && mvpp2_is_xlg(interface))
4568 		mvpp2_xlg_max_rx_size_set(port);
4569 	else
4570 		mvpp2_gmac_max_rx_size_set(port);
4571 }
4572 
4573 /* Set hw internals when starting port */
4574 static void mvpp2_start_dev(struct mvpp2_port *port)
4575 {
4576 	int i;
4577 
4578 	mvpp2_txp_max_tx_size_set(port);
4579 
4580 	for (i = 0; i < port->nqvecs; i++)
4581 		napi_enable(&port->qvecs[i].napi);
4582 
4583 	/* Enable interrupts on all threads */
4584 	mvpp2_interrupts_enable(port);
4585 
4586 	if (port->priv->hw_version >= MVPP22)
4587 		mvpp22_mode_reconfigure(port, port->phy_interface);
4588 
4589 	if (port->phylink) {
4590 		phylink_start(port->phylink);
4591 	} else {
4592 		mvpp2_acpi_start(port);
4593 	}
4594 
4595 	netif_tx_start_all_queues(port->dev);
4596 
4597 	clear_bit(0, &port->state);
4598 }
4599 
4600 /* Set hw internals when stopping port */
4601 static void mvpp2_stop_dev(struct mvpp2_port *port)
4602 {
4603 	int i;
4604 
4605 	set_bit(0, &port->state);
4606 
4607 	/* Disable interrupts on all threads */
4608 	mvpp2_interrupts_disable(port);
4609 
4610 	for (i = 0; i < port->nqvecs; i++)
4611 		napi_disable(&port->qvecs[i].napi);
4612 
4613 	if (port->phylink)
4614 		phylink_stop(port->phylink);
4615 	phy_power_off(port->comphy);
4616 }
4617 
4618 static int mvpp2_check_ringparam_valid(struct net_device *dev,
4619 				       struct ethtool_ringparam *ring)
4620 {
4621 	u16 new_rx_pending = ring->rx_pending;
4622 	u16 new_tx_pending = ring->tx_pending;
4623 
4624 	if (ring->rx_pending == 0 || ring->tx_pending == 0)
4625 		return -EINVAL;
4626 
4627 	if (ring->rx_pending > MVPP2_MAX_RXD_MAX)
4628 		new_rx_pending = MVPP2_MAX_RXD_MAX;
4629 	else if (ring->rx_pending < MSS_THRESHOLD_START)
4630 		new_rx_pending = MSS_THRESHOLD_START;
4631 	else if (!IS_ALIGNED(ring->rx_pending, 16))
4632 		new_rx_pending = ALIGN(ring->rx_pending, 16);
4633 
4634 	if (ring->tx_pending > MVPP2_MAX_TXD_MAX)
4635 		new_tx_pending = MVPP2_MAX_TXD_MAX;
4636 	else if (!IS_ALIGNED(ring->tx_pending, 32))
4637 		new_tx_pending = ALIGN(ring->tx_pending, 32);
4638 
4639 	/* The Tx ring size cannot be smaller than the minimum number of
4640 	 * descriptors needed for TSO.
4641 	 */
4642 	if (new_tx_pending < MVPP2_MAX_SKB_DESCS)
4643 		new_tx_pending = ALIGN(MVPP2_MAX_SKB_DESCS, 32);
4644 
4645 	if (ring->rx_pending != new_rx_pending) {
4646 		netdev_info(dev, "illegal Rx ring size value %d, round to %d\n",
4647 			    ring->rx_pending, new_rx_pending);
4648 		ring->rx_pending = new_rx_pending;
4649 	}
4650 
4651 	if (ring->tx_pending != new_tx_pending) {
4652 		netdev_info(dev, "illegal Tx ring size value %d, round to %d\n",
4653 			    ring->tx_pending, new_tx_pending);
4654 		ring->tx_pending = new_tx_pending;
4655 	}
4656 
4657 	return 0;
4658 }
4659 
4660 static void mvpp21_get_mac_address(struct mvpp2_port *port, unsigned char *addr)
4661 {
4662 	u32 mac_addr_l, mac_addr_m, mac_addr_h;
4663 
4664 	mac_addr_l = readl(port->base + MVPP2_GMAC_CTRL_1_REG);
4665 	mac_addr_m = readl(port->priv->lms_base + MVPP2_SRC_ADDR_MIDDLE);
4666 	mac_addr_h = readl(port->priv->lms_base + MVPP2_SRC_ADDR_HIGH);
4667 	addr[0] = (mac_addr_h >> 24) & 0xFF;
4668 	addr[1] = (mac_addr_h >> 16) & 0xFF;
4669 	addr[2] = (mac_addr_h >> 8) & 0xFF;
4670 	addr[3] = mac_addr_h & 0xFF;
4671 	addr[4] = mac_addr_m & 0xFF;
4672 	addr[5] = (mac_addr_l >> MVPP2_GMAC_SA_LOW_OFFS) & 0xFF;
4673 }
4674 
4675 static int mvpp2_irqs_init(struct mvpp2_port *port)
4676 {
4677 	int err, i;
4678 
4679 	for (i = 0; i < port->nqvecs; i++) {
4680 		struct mvpp2_queue_vector *qv = port->qvecs + i;
4681 
4682 		if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) {
4683 			qv->mask = kzalloc(cpumask_size(), GFP_KERNEL);
4684 			if (!qv->mask) {
4685 				err = -ENOMEM;
4686 				goto err;
4687 			}
4688 
4689 			irq_set_status_flags(qv->irq, IRQ_NO_BALANCING);
4690 		}
4691 
4692 		err = request_irq(qv->irq, mvpp2_isr, 0, port->dev->name, qv);
4693 		if (err)
4694 			goto err;
4695 
4696 		if (qv->type == MVPP2_QUEUE_VECTOR_PRIVATE) {
4697 			unsigned int cpu;
4698 
4699 			for_each_present_cpu(cpu) {
4700 				if (mvpp2_cpu_to_thread(port->priv, cpu) ==
4701 				    qv->sw_thread_id)
4702 					cpumask_set_cpu(cpu, qv->mask);
4703 			}
4704 
4705 			irq_set_affinity_hint(qv->irq, qv->mask);
4706 		}
4707 	}
4708 
4709 	return 0;
4710 err:
4711 	for (i = 0; i < port->nqvecs; i++) {
4712 		struct mvpp2_queue_vector *qv = port->qvecs + i;
4713 
4714 		irq_set_affinity_hint(qv->irq, NULL);
4715 		kfree(qv->mask);
4716 		qv->mask = NULL;
4717 		free_irq(qv->irq, qv);
4718 	}
4719 
4720 	return err;
4721 }
4722 
4723 static void mvpp2_irqs_deinit(struct mvpp2_port *port)
4724 {
4725 	int i;
4726 
4727 	for (i = 0; i < port->nqvecs; i++) {
4728 		struct mvpp2_queue_vector *qv = port->qvecs + i;
4729 
4730 		irq_set_affinity_hint(qv->irq, NULL);
4731 		kfree(qv->mask);
4732 		qv->mask = NULL;
4733 		irq_clear_status_flags(qv->irq, IRQ_NO_BALANCING);
4734 		free_irq(qv->irq, qv);
4735 	}
4736 }
4737 
4738 static bool mvpp22_rss_is_supported(struct mvpp2_port *port)
4739 {
4740 	return (queue_mode == MVPP2_QDIST_MULTI_MODE) &&
4741 		!(port->flags & MVPP2_F_LOOPBACK);
4742 }
4743 
4744 static int mvpp2_open(struct net_device *dev)
4745 {
4746 	struct mvpp2_port *port = netdev_priv(dev);
4747 	struct mvpp2 *priv = port->priv;
4748 	unsigned char mac_bcast[ETH_ALEN] = {
4749 			0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
4750 	bool valid = false;
4751 	int err;
4752 
4753 	err = mvpp2_prs_mac_da_accept(port, mac_bcast, true);
4754 	if (err) {
4755 		netdev_err(dev, "mvpp2_prs_mac_da_accept BC failed\n");
4756 		return err;
4757 	}
4758 	err = mvpp2_prs_mac_da_accept(port, dev->dev_addr, true);
4759 	if (err) {
4760 		netdev_err(dev, "mvpp2_prs_mac_da_accept own addr failed\n");
4761 		return err;
4762 	}
4763 	err = mvpp2_prs_tag_mode_set(port->priv, port->id, MVPP2_TAG_TYPE_MH);
4764 	if (err) {
4765 		netdev_err(dev, "mvpp2_prs_tag_mode_set failed\n");
4766 		return err;
4767 	}
4768 	err = mvpp2_prs_def_flow(port);
4769 	if (err) {
4770 		netdev_err(dev, "mvpp2_prs_def_flow failed\n");
4771 		return err;
4772 	}
4773 
4774 	/* Allocate the Rx/Tx queues */
4775 	err = mvpp2_setup_rxqs(port);
4776 	if (err) {
4777 		netdev_err(port->dev, "cannot allocate Rx queues\n");
4778 		return err;
4779 	}
4780 
4781 	err = mvpp2_setup_txqs(port);
4782 	if (err) {
4783 		netdev_err(port->dev, "cannot allocate Tx queues\n");
4784 		goto err_cleanup_rxqs;
4785 	}
4786 
4787 	err = mvpp2_irqs_init(port);
4788 	if (err) {
4789 		netdev_err(port->dev, "cannot init IRQs\n");
4790 		goto err_cleanup_txqs;
4791 	}
4792 
4793 	if (port->phylink) {
4794 		err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0);
4795 		if (err) {
4796 			netdev_err(port->dev, "could not attach PHY (%d)\n",
4797 				   err);
4798 			goto err_free_irq;
4799 		}
4800 
4801 		valid = true;
4802 	}
4803 
4804 	if (priv->hw_version >= MVPP22 && port->port_irq) {
4805 		err = request_irq(port->port_irq, mvpp2_port_isr, 0,
4806 				  dev->name, port);
4807 		if (err) {
4808 			netdev_err(port->dev,
4809 				   "cannot request port link/ptp IRQ %d\n",
4810 				   port->port_irq);
4811 			goto err_free_irq;
4812 		}
4813 
4814 		mvpp22_gop_setup_irq(port);
4815 
4816 		/* In default link is down */
4817 		netif_carrier_off(port->dev);
4818 
4819 		valid = true;
4820 	} else {
4821 		port->port_irq = 0;
4822 	}
4823 
4824 	if (!valid) {
4825 		netdev_err(port->dev,
4826 			   "invalid configuration: no dt or link IRQ");
4827 		err = -ENOENT;
4828 		goto err_free_irq;
4829 	}
4830 
4831 	/* Unmask interrupts on all CPUs */
4832 	on_each_cpu(mvpp2_interrupts_unmask, port, 1);
4833 	mvpp2_shared_interrupt_mask_unmask(port, false);
4834 
4835 	mvpp2_start_dev(port);
4836 
4837 	/* Start hardware statistics gathering */
4838 	queue_delayed_work(priv->stats_queue, &port->stats_work,
4839 			   MVPP2_MIB_COUNTERS_STATS_DELAY);
4840 
4841 	return 0;
4842 
4843 err_free_irq:
4844 	mvpp2_irqs_deinit(port);
4845 err_cleanup_txqs:
4846 	mvpp2_cleanup_txqs(port);
4847 err_cleanup_rxqs:
4848 	mvpp2_cleanup_rxqs(port);
4849 	return err;
4850 }
4851 
4852 static int mvpp2_stop(struct net_device *dev)
4853 {
4854 	struct mvpp2_port *port = netdev_priv(dev);
4855 	struct mvpp2_port_pcpu *port_pcpu;
4856 	unsigned int thread;
4857 
4858 	mvpp2_stop_dev(port);
4859 
4860 	/* Mask interrupts on all threads */
4861 	on_each_cpu(mvpp2_interrupts_mask, port, 1);
4862 	mvpp2_shared_interrupt_mask_unmask(port, true);
4863 
4864 	if (port->phylink)
4865 		phylink_disconnect_phy(port->phylink);
4866 	if (port->port_irq)
4867 		free_irq(port->port_irq, port);
4868 
4869 	mvpp2_irqs_deinit(port);
4870 	if (!port->has_tx_irqs) {
4871 		for (thread = 0; thread < port->priv->nthreads; thread++) {
4872 			port_pcpu = per_cpu_ptr(port->pcpu, thread);
4873 
4874 			hrtimer_cancel(&port_pcpu->tx_done_timer);
4875 			port_pcpu->timer_scheduled = false;
4876 		}
4877 	}
4878 	mvpp2_cleanup_rxqs(port);
4879 	mvpp2_cleanup_txqs(port);
4880 
4881 	cancel_delayed_work_sync(&port->stats_work);
4882 
4883 	mvpp2_mac_reset_assert(port);
4884 	mvpp22_pcs_reset_assert(port);
4885 
4886 	return 0;
4887 }
4888 
4889 static int mvpp2_prs_mac_da_accept_list(struct mvpp2_port *port,
4890 					struct netdev_hw_addr_list *list)
4891 {
4892 	struct netdev_hw_addr *ha;
4893 	int ret;
4894 
4895 	netdev_hw_addr_list_for_each(ha, list) {
4896 		ret = mvpp2_prs_mac_da_accept(port, ha->addr, true);
4897 		if (ret)
4898 			return ret;
4899 	}
4900 
4901 	return 0;
4902 }
4903 
4904 static void mvpp2_set_rx_promisc(struct mvpp2_port *port, bool enable)
4905 {
4906 	if (!enable && (port->dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
4907 		mvpp2_prs_vid_enable_filtering(port);
4908 	else
4909 		mvpp2_prs_vid_disable_filtering(port);
4910 
4911 	mvpp2_prs_mac_promisc_set(port->priv, port->id,
4912 				  MVPP2_PRS_L2_UNI_CAST, enable);
4913 
4914 	mvpp2_prs_mac_promisc_set(port->priv, port->id,
4915 				  MVPP2_PRS_L2_MULTI_CAST, enable);
4916 }
4917 
4918 static void mvpp2_set_rx_mode(struct net_device *dev)
4919 {
4920 	struct mvpp2_port *port = netdev_priv(dev);
4921 
4922 	/* Clear the whole UC and MC list */
4923 	mvpp2_prs_mac_del_all(port);
4924 
4925 	if (dev->flags & IFF_PROMISC) {
4926 		mvpp2_set_rx_promisc(port, true);
4927 		return;
4928 	}
4929 
4930 	mvpp2_set_rx_promisc(port, false);
4931 
4932 	if (netdev_uc_count(dev) > MVPP2_PRS_MAC_UC_FILT_MAX ||
4933 	    mvpp2_prs_mac_da_accept_list(port, &dev->uc))
4934 		mvpp2_prs_mac_promisc_set(port->priv, port->id,
4935 					  MVPP2_PRS_L2_UNI_CAST, true);
4936 
4937 	if (dev->flags & IFF_ALLMULTI) {
4938 		mvpp2_prs_mac_promisc_set(port->priv, port->id,
4939 					  MVPP2_PRS_L2_MULTI_CAST, true);
4940 		return;
4941 	}
4942 
4943 	if (netdev_mc_count(dev) > MVPP2_PRS_MAC_MC_FILT_MAX ||
4944 	    mvpp2_prs_mac_da_accept_list(port, &dev->mc))
4945 		mvpp2_prs_mac_promisc_set(port->priv, port->id,
4946 					  MVPP2_PRS_L2_MULTI_CAST, true);
4947 }
4948 
4949 static int mvpp2_set_mac_address(struct net_device *dev, void *p)
4950 {
4951 	const struct sockaddr *addr = p;
4952 	int err;
4953 
4954 	if (!is_valid_ether_addr(addr->sa_data))
4955 		return -EADDRNOTAVAIL;
4956 
4957 	err = mvpp2_prs_update_mac_da(dev, addr->sa_data);
4958 	if (err) {
4959 		/* Reconfigure parser accept the original MAC address */
4960 		mvpp2_prs_update_mac_da(dev, dev->dev_addr);
4961 		netdev_err(dev, "failed to change MAC address\n");
4962 	}
4963 	return err;
4964 }
4965 
4966 /* Shut down all the ports, reconfigure the pools as percpu or shared,
4967  * then bring up again all ports.
4968  */
4969 static int mvpp2_bm_switch_buffers(struct mvpp2 *priv, bool percpu)
4970 {
4971 	bool change_percpu = (percpu != priv->percpu_pools);
4972 	int numbufs = MVPP2_BM_POOLS_NUM, i;
4973 	struct mvpp2_port *port = NULL;
4974 	bool status[MVPP2_MAX_PORTS];
4975 
4976 	for (i = 0; i < priv->port_count; i++) {
4977 		port = priv->port_list[i];
4978 		status[i] = netif_running(port->dev);
4979 		if (status[i])
4980 			mvpp2_stop(port->dev);
4981 	}
4982 
4983 	/* nrxqs is the same for all ports */
4984 	if (priv->percpu_pools)
4985 		numbufs = port->nrxqs * 2;
4986 
4987 	if (change_percpu)
4988 		mvpp2_bm_pool_update_priv_fc(priv, false);
4989 
4990 	for (i = 0; i < numbufs; i++)
4991 		mvpp2_bm_pool_destroy(port->dev->dev.parent, priv, &priv->bm_pools[i]);
4992 
4993 	devm_kfree(port->dev->dev.parent, priv->bm_pools);
4994 	priv->percpu_pools = percpu;
4995 	mvpp2_bm_init(port->dev->dev.parent, priv);
4996 
4997 	for (i = 0; i < priv->port_count; i++) {
4998 		port = priv->port_list[i];
4999 		mvpp2_swf_bm_pool_init(port);
5000 		if (status[i])
5001 			mvpp2_open(port->dev);
5002 	}
5003 
5004 	if (change_percpu)
5005 		mvpp2_bm_pool_update_priv_fc(priv, true);
5006 
5007 	return 0;
5008 }
5009 
5010 static int mvpp2_change_mtu(struct net_device *dev, int mtu)
5011 {
5012 	struct mvpp2_port *port = netdev_priv(dev);
5013 	bool running = netif_running(dev);
5014 	struct mvpp2 *priv = port->priv;
5015 	int err;
5016 
5017 	if (!IS_ALIGNED(MVPP2_RX_PKT_SIZE(mtu), 8)) {
5018 		netdev_info(dev, "illegal MTU value %d, round to %d\n", mtu,
5019 			    ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8));
5020 		mtu = ALIGN(MVPP2_RX_PKT_SIZE(mtu), 8);
5021 	}
5022 
5023 	if (port->xdp_prog && mtu > MVPP2_MAX_RX_BUF_SIZE) {
5024 		netdev_err(dev, "Illegal MTU value %d (> %d) for XDP mode\n",
5025 			   mtu, (int)MVPP2_MAX_RX_BUF_SIZE);
5026 		return -EINVAL;
5027 	}
5028 
5029 	if (MVPP2_RX_PKT_SIZE(mtu) > MVPP2_BM_LONG_PKT_SIZE) {
5030 		if (priv->percpu_pools) {
5031 			netdev_warn(dev, "mtu %d too high, switching to shared buffers", mtu);
5032 			mvpp2_bm_switch_buffers(priv, false);
5033 		}
5034 	} else {
5035 		bool jumbo = false;
5036 		int i;
5037 
5038 		for (i = 0; i < priv->port_count; i++)
5039 			if (priv->port_list[i] != port &&
5040 			    MVPP2_RX_PKT_SIZE(priv->port_list[i]->dev->mtu) >
5041 			    MVPP2_BM_LONG_PKT_SIZE) {
5042 				jumbo = true;
5043 				break;
5044 			}
5045 
5046 		/* No port is using jumbo frames */
5047 		if (!jumbo) {
5048 			dev_info(port->dev->dev.parent,
5049 				 "all ports have a low MTU, switching to per-cpu buffers");
5050 			mvpp2_bm_switch_buffers(priv, true);
5051 		}
5052 	}
5053 
5054 	if (running)
5055 		mvpp2_stop_dev(port);
5056 
5057 	err = mvpp2_bm_update_mtu(dev, mtu);
5058 	if (err) {
5059 		netdev_err(dev, "failed to change MTU\n");
5060 		/* Reconfigure BM to the original MTU */
5061 		mvpp2_bm_update_mtu(dev, dev->mtu);
5062 	} else {
5063 		port->pkt_size =  MVPP2_RX_PKT_SIZE(mtu);
5064 	}
5065 
5066 	if (running) {
5067 		mvpp2_start_dev(port);
5068 		mvpp2_egress_enable(port);
5069 		mvpp2_ingress_enable(port);
5070 	}
5071 
5072 	return err;
5073 }
5074 
5075 static int mvpp2_check_pagepool_dma(struct mvpp2_port *port)
5076 {
5077 	enum dma_data_direction dma_dir = DMA_FROM_DEVICE;
5078 	struct mvpp2 *priv = port->priv;
5079 	int err = -1, i;
5080 
5081 	if (!priv->percpu_pools)
5082 		return err;
5083 
5084 	if (!priv->page_pool[0])
5085 		return -ENOMEM;
5086 
5087 	for (i = 0; i < priv->port_count; i++) {
5088 		port = priv->port_list[i];
5089 		if (port->xdp_prog) {
5090 			dma_dir = DMA_BIDIRECTIONAL;
5091 			break;
5092 		}
5093 	}
5094 
5095 	/* All pools are equal in terms of DMA direction */
5096 	if (priv->page_pool[0]->p.dma_dir != dma_dir)
5097 		err = mvpp2_bm_switch_buffers(priv, true);
5098 
5099 	return err;
5100 }
5101 
5102 static void
5103 mvpp2_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
5104 {
5105 	struct mvpp2_port *port = netdev_priv(dev);
5106 	unsigned int start;
5107 	unsigned int cpu;
5108 
5109 	for_each_possible_cpu(cpu) {
5110 		struct mvpp2_pcpu_stats *cpu_stats;
5111 		u64 rx_packets;
5112 		u64 rx_bytes;
5113 		u64 tx_packets;
5114 		u64 tx_bytes;
5115 
5116 		cpu_stats = per_cpu_ptr(port->stats, cpu);
5117 		do {
5118 			start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
5119 			rx_packets = cpu_stats->rx_packets;
5120 			rx_bytes   = cpu_stats->rx_bytes;
5121 			tx_packets = cpu_stats->tx_packets;
5122 			tx_bytes   = cpu_stats->tx_bytes;
5123 		} while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
5124 
5125 		stats->rx_packets += rx_packets;
5126 		stats->rx_bytes   += rx_bytes;
5127 		stats->tx_packets += tx_packets;
5128 		stats->tx_bytes   += tx_bytes;
5129 	}
5130 
5131 	stats->rx_errors	= dev->stats.rx_errors;
5132 	stats->rx_dropped	= dev->stats.rx_dropped;
5133 	stats->tx_dropped	= dev->stats.tx_dropped;
5134 }
5135 
5136 static int mvpp2_set_ts_config(struct mvpp2_port *port, struct ifreq *ifr)
5137 {
5138 	struct hwtstamp_config config;
5139 	void __iomem *ptp;
5140 	u32 gcr, int_mask;
5141 
5142 	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
5143 		return -EFAULT;
5144 
5145 	if (config.tx_type != HWTSTAMP_TX_OFF &&
5146 	    config.tx_type != HWTSTAMP_TX_ON)
5147 		return -ERANGE;
5148 
5149 	ptp = port->priv->iface_base + MVPP22_PTP_BASE(port->gop_id);
5150 
5151 	int_mask = gcr = 0;
5152 	if (config.tx_type != HWTSTAMP_TX_OFF) {
5153 		gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_TX_RESET;
5154 		int_mask |= MVPP22_PTP_INT_MASK_QUEUE1 |
5155 			    MVPP22_PTP_INT_MASK_QUEUE0;
5156 	}
5157 
5158 	/* It seems we must also release the TX reset when enabling the TSU */
5159 	if (config.rx_filter != HWTSTAMP_FILTER_NONE)
5160 		gcr |= MVPP22_PTP_GCR_TSU_ENABLE | MVPP22_PTP_GCR_RX_RESET |
5161 		       MVPP22_PTP_GCR_TX_RESET;
5162 
5163 	if (gcr & MVPP22_PTP_GCR_TSU_ENABLE)
5164 		mvpp22_tai_start(port->priv->tai);
5165 
5166 	if (config.rx_filter != HWTSTAMP_FILTER_NONE) {
5167 		config.rx_filter = HWTSTAMP_FILTER_ALL;
5168 		mvpp2_modify(ptp + MVPP22_PTP_GCR,
5169 			     MVPP22_PTP_GCR_RX_RESET |
5170 			     MVPP22_PTP_GCR_TX_RESET |
5171 			     MVPP22_PTP_GCR_TSU_ENABLE, gcr);
5172 		port->rx_hwtstamp = true;
5173 	} else {
5174 		port->rx_hwtstamp = false;
5175 		mvpp2_modify(ptp + MVPP22_PTP_GCR,
5176 			     MVPP22_PTP_GCR_RX_RESET |
5177 			     MVPP22_PTP_GCR_TX_RESET |
5178 			     MVPP22_PTP_GCR_TSU_ENABLE, gcr);
5179 	}
5180 
5181 	mvpp2_modify(ptp + MVPP22_PTP_INT_MASK,
5182 		     MVPP22_PTP_INT_MASK_QUEUE1 |
5183 		     MVPP22_PTP_INT_MASK_QUEUE0, int_mask);
5184 
5185 	if (!(gcr & MVPP22_PTP_GCR_TSU_ENABLE))
5186 		mvpp22_tai_stop(port->priv->tai);
5187 
5188 	port->tx_hwtstamp_type = config.tx_type;
5189 
5190 	if (copy_to_user(ifr->ifr_data, &config, sizeof(config)))
5191 		return -EFAULT;
5192 
5193 	return 0;
5194 }
5195 
5196 static int mvpp2_get_ts_config(struct mvpp2_port *port, struct ifreq *ifr)
5197 {
5198 	struct hwtstamp_config config;
5199 
5200 	memset(&config, 0, sizeof(config));
5201 
5202 	config.tx_type = port->tx_hwtstamp_type;
5203 	config.rx_filter = port->rx_hwtstamp ?
5204 		HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
5205 
5206 	if (copy_to_user(ifr->ifr_data, &config, sizeof(config)))
5207 		return -EFAULT;
5208 
5209 	return 0;
5210 }
5211 
5212 static int mvpp2_ethtool_get_ts_info(struct net_device *dev,
5213 				     struct ethtool_ts_info *info)
5214 {
5215 	struct mvpp2_port *port = netdev_priv(dev);
5216 
5217 	if (!port->hwtstamp)
5218 		return -EOPNOTSUPP;
5219 
5220 	info->phc_index = mvpp22_tai_ptp_clock_index(port->priv->tai);
5221 	info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE |
5222 				SOF_TIMESTAMPING_RX_SOFTWARE |
5223 				SOF_TIMESTAMPING_SOFTWARE |
5224 				SOF_TIMESTAMPING_TX_HARDWARE |
5225 				SOF_TIMESTAMPING_RX_HARDWARE |
5226 				SOF_TIMESTAMPING_RAW_HARDWARE;
5227 	info->tx_types = BIT(HWTSTAMP_TX_OFF) |
5228 			 BIT(HWTSTAMP_TX_ON);
5229 	info->rx_filters = BIT(HWTSTAMP_FILTER_NONE) |
5230 			   BIT(HWTSTAMP_FILTER_ALL);
5231 
5232 	return 0;
5233 }
5234 
5235 static int mvpp2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
5236 {
5237 	struct mvpp2_port *port = netdev_priv(dev);
5238 
5239 	switch (cmd) {
5240 	case SIOCSHWTSTAMP:
5241 		if (port->hwtstamp)
5242 			return mvpp2_set_ts_config(port, ifr);
5243 		break;
5244 
5245 	case SIOCGHWTSTAMP:
5246 		if (port->hwtstamp)
5247 			return mvpp2_get_ts_config(port, ifr);
5248 		break;
5249 	}
5250 
5251 	if (!port->phylink)
5252 		return -ENOTSUPP;
5253 
5254 	return phylink_mii_ioctl(port->phylink, ifr, cmd);
5255 }
5256 
5257 static int mvpp2_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid)
5258 {
5259 	struct mvpp2_port *port = netdev_priv(dev);
5260 	int ret;
5261 
5262 	ret = mvpp2_prs_vid_entry_add(port, vid);
5263 	if (ret)
5264 		netdev_err(dev, "rx-vlan-filter offloading cannot accept more than %d VIDs per port\n",
5265 			   MVPP2_PRS_VLAN_FILT_MAX - 1);
5266 	return ret;
5267 }
5268 
5269 static int mvpp2_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid)
5270 {
5271 	struct mvpp2_port *port = netdev_priv(dev);
5272 
5273 	mvpp2_prs_vid_entry_remove(port, vid);
5274 	return 0;
5275 }
5276 
5277 static int mvpp2_set_features(struct net_device *dev,
5278 			      netdev_features_t features)
5279 {
5280 	netdev_features_t changed = dev->features ^ features;
5281 	struct mvpp2_port *port = netdev_priv(dev);
5282 
5283 	if (changed & NETIF_F_HW_VLAN_CTAG_FILTER) {
5284 		if (features & NETIF_F_HW_VLAN_CTAG_FILTER) {
5285 			mvpp2_prs_vid_enable_filtering(port);
5286 		} else {
5287 			/* Invalidate all registered VID filters for this
5288 			 * port
5289 			 */
5290 			mvpp2_prs_vid_remove_all(port);
5291 
5292 			mvpp2_prs_vid_disable_filtering(port);
5293 		}
5294 	}
5295 
5296 	if (changed & NETIF_F_RXHASH) {
5297 		if (features & NETIF_F_RXHASH)
5298 			mvpp22_port_rss_enable(port);
5299 		else
5300 			mvpp22_port_rss_disable(port);
5301 	}
5302 
5303 	return 0;
5304 }
5305 
5306 static int mvpp2_xdp_setup(struct mvpp2_port *port, struct netdev_bpf *bpf)
5307 {
5308 	struct bpf_prog *prog = bpf->prog, *old_prog;
5309 	bool running = netif_running(port->dev);
5310 	bool reset = !prog != !port->xdp_prog;
5311 
5312 	if (port->dev->mtu > MVPP2_MAX_RX_BUF_SIZE) {
5313 		NL_SET_ERR_MSG_MOD(bpf->extack, "MTU too large for XDP");
5314 		return -EOPNOTSUPP;
5315 	}
5316 
5317 	if (!port->priv->percpu_pools) {
5318 		NL_SET_ERR_MSG_MOD(bpf->extack, "Per CPU Pools required for XDP");
5319 		return -EOPNOTSUPP;
5320 	}
5321 
5322 	if (port->ntxqs < num_possible_cpus() * 2) {
5323 		NL_SET_ERR_MSG_MOD(bpf->extack, "XDP_TX needs two TX queues per CPU");
5324 		return -EOPNOTSUPP;
5325 	}
5326 
5327 	/* device is up and bpf is added/removed, must setup the RX queues */
5328 	if (running && reset)
5329 		mvpp2_stop(port->dev);
5330 
5331 	old_prog = xchg(&port->xdp_prog, prog);
5332 	if (old_prog)
5333 		bpf_prog_put(old_prog);
5334 
5335 	/* bpf is just replaced, RXQ and MTU are already setup */
5336 	if (!reset)
5337 		return 0;
5338 
5339 	/* device was up, restore the link */
5340 	if (running)
5341 		mvpp2_open(port->dev);
5342 
5343 	/* Check Page Pool DMA Direction */
5344 	mvpp2_check_pagepool_dma(port);
5345 
5346 	return 0;
5347 }
5348 
5349 static int mvpp2_xdp(struct net_device *dev, struct netdev_bpf *xdp)
5350 {
5351 	struct mvpp2_port *port = netdev_priv(dev);
5352 
5353 	switch (xdp->command) {
5354 	case XDP_SETUP_PROG:
5355 		return mvpp2_xdp_setup(port, xdp);
5356 	default:
5357 		return -EINVAL;
5358 	}
5359 }
5360 
5361 /* Ethtool methods */
5362 
5363 static int mvpp2_ethtool_nway_reset(struct net_device *dev)
5364 {
5365 	struct mvpp2_port *port = netdev_priv(dev);
5366 
5367 	if (!port->phylink)
5368 		return -ENOTSUPP;
5369 
5370 	return phylink_ethtool_nway_reset(port->phylink);
5371 }
5372 
5373 /* Set interrupt coalescing for ethtools */
5374 static int
5375 mvpp2_ethtool_set_coalesce(struct net_device *dev,
5376 			   struct ethtool_coalesce *c,
5377 			   struct kernel_ethtool_coalesce *kernel_coal,
5378 			   struct netlink_ext_ack *extack)
5379 {
5380 	struct mvpp2_port *port = netdev_priv(dev);
5381 	int queue;
5382 
5383 	for (queue = 0; queue < port->nrxqs; queue++) {
5384 		struct mvpp2_rx_queue *rxq = port->rxqs[queue];
5385 
5386 		rxq->time_coal = c->rx_coalesce_usecs;
5387 		rxq->pkts_coal = c->rx_max_coalesced_frames;
5388 		mvpp2_rx_pkts_coal_set(port, rxq);
5389 		mvpp2_rx_time_coal_set(port, rxq);
5390 	}
5391 
5392 	if (port->has_tx_irqs) {
5393 		port->tx_time_coal = c->tx_coalesce_usecs;
5394 		mvpp2_tx_time_coal_set(port);
5395 	}
5396 
5397 	for (queue = 0; queue < port->ntxqs; queue++) {
5398 		struct mvpp2_tx_queue *txq = port->txqs[queue];
5399 
5400 		txq->done_pkts_coal = c->tx_max_coalesced_frames;
5401 
5402 		if (port->has_tx_irqs)
5403 			mvpp2_tx_pkts_coal_set(port, txq);
5404 	}
5405 
5406 	return 0;
5407 }
5408 
5409 /* get coalescing for ethtools */
5410 static int
5411 mvpp2_ethtool_get_coalesce(struct net_device *dev,
5412 			   struct ethtool_coalesce *c,
5413 			   struct kernel_ethtool_coalesce *kernel_coal,
5414 			   struct netlink_ext_ack *extack)
5415 {
5416 	struct mvpp2_port *port = netdev_priv(dev);
5417 
5418 	c->rx_coalesce_usecs       = port->rxqs[0]->time_coal;
5419 	c->rx_max_coalesced_frames = port->rxqs[0]->pkts_coal;
5420 	c->tx_max_coalesced_frames = port->txqs[0]->done_pkts_coal;
5421 	c->tx_coalesce_usecs       = port->tx_time_coal;
5422 	return 0;
5423 }
5424 
5425 static void mvpp2_ethtool_get_drvinfo(struct net_device *dev,
5426 				      struct ethtool_drvinfo *drvinfo)
5427 {
5428 	strscpy(drvinfo->driver, MVPP2_DRIVER_NAME,
5429 		sizeof(drvinfo->driver));
5430 	strscpy(drvinfo->version, MVPP2_DRIVER_VERSION,
5431 		sizeof(drvinfo->version));
5432 	strscpy(drvinfo->bus_info, dev_name(&dev->dev),
5433 		sizeof(drvinfo->bus_info));
5434 }
5435 
5436 static void
5437 mvpp2_ethtool_get_ringparam(struct net_device *dev,
5438 			    struct ethtool_ringparam *ring,
5439 			    struct kernel_ethtool_ringparam *kernel_ring,
5440 			    struct netlink_ext_ack *extack)
5441 {
5442 	struct mvpp2_port *port = netdev_priv(dev);
5443 
5444 	ring->rx_max_pending = MVPP2_MAX_RXD_MAX;
5445 	ring->tx_max_pending = MVPP2_MAX_TXD_MAX;
5446 	ring->rx_pending = port->rx_ring_size;
5447 	ring->tx_pending = port->tx_ring_size;
5448 }
5449 
5450 static int
5451 mvpp2_ethtool_set_ringparam(struct net_device *dev,
5452 			    struct ethtool_ringparam *ring,
5453 			    struct kernel_ethtool_ringparam *kernel_ring,
5454 			    struct netlink_ext_ack *extack)
5455 {
5456 	struct mvpp2_port *port = netdev_priv(dev);
5457 	u16 prev_rx_ring_size = port->rx_ring_size;
5458 	u16 prev_tx_ring_size = port->tx_ring_size;
5459 	int err;
5460 
5461 	err = mvpp2_check_ringparam_valid(dev, ring);
5462 	if (err)
5463 		return err;
5464 
5465 	if (!netif_running(dev)) {
5466 		port->rx_ring_size = ring->rx_pending;
5467 		port->tx_ring_size = ring->tx_pending;
5468 		return 0;
5469 	}
5470 
5471 	/* The interface is running, so we have to force a
5472 	 * reallocation of the queues
5473 	 */
5474 	mvpp2_stop_dev(port);
5475 	mvpp2_cleanup_rxqs(port);
5476 	mvpp2_cleanup_txqs(port);
5477 
5478 	port->rx_ring_size = ring->rx_pending;
5479 	port->tx_ring_size = ring->tx_pending;
5480 
5481 	err = mvpp2_setup_rxqs(port);
5482 	if (err) {
5483 		/* Reallocate Rx queues with the original ring size */
5484 		port->rx_ring_size = prev_rx_ring_size;
5485 		ring->rx_pending = prev_rx_ring_size;
5486 		err = mvpp2_setup_rxqs(port);
5487 		if (err)
5488 			goto err_out;
5489 	}
5490 	err = mvpp2_setup_txqs(port);
5491 	if (err) {
5492 		/* Reallocate Tx queues with the original ring size */
5493 		port->tx_ring_size = prev_tx_ring_size;
5494 		ring->tx_pending = prev_tx_ring_size;
5495 		err = mvpp2_setup_txqs(port);
5496 		if (err)
5497 			goto err_clean_rxqs;
5498 	}
5499 
5500 	mvpp2_start_dev(port);
5501 	mvpp2_egress_enable(port);
5502 	mvpp2_ingress_enable(port);
5503 
5504 	return 0;
5505 
5506 err_clean_rxqs:
5507 	mvpp2_cleanup_rxqs(port);
5508 err_out:
5509 	netdev_err(dev, "failed to change ring parameters");
5510 	return err;
5511 }
5512 
5513 static void mvpp2_ethtool_get_pause_param(struct net_device *dev,
5514 					  struct ethtool_pauseparam *pause)
5515 {
5516 	struct mvpp2_port *port = netdev_priv(dev);
5517 
5518 	if (!port->phylink)
5519 		return;
5520 
5521 	phylink_ethtool_get_pauseparam(port->phylink, pause);
5522 }
5523 
5524 static int mvpp2_ethtool_set_pause_param(struct net_device *dev,
5525 					 struct ethtool_pauseparam *pause)
5526 {
5527 	struct mvpp2_port *port = netdev_priv(dev);
5528 
5529 	if (!port->phylink)
5530 		return -ENOTSUPP;
5531 
5532 	return phylink_ethtool_set_pauseparam(port->phylink, pause);
5533 }
5534 
5535 static int mvpp2_ethtool_get_link_ksettings(struct net_device *dev,
5536 					    struct ethtool_link_ksettings *cmd)
5537 {
5538 	struct mvpp2_port *port = netdev_priv(dev);
5539 
5540 	if (!port->phylink)
5541 		return -ENOTSUPP;
5542 
5543 	return phylink_ethtool_ksettings_get(port->phylink, cmd);
5544 }
5545 
5546 static int mvpp2_ethtool_set_link_ksettings(struct net_device *dev,
5547 					    const struct ethtool_link_ksettings *cmd)
5548 {
5549 	struct mvpp2_port *port = netdev_priv(dev);
5550 
5551 	if (!port->phylink)
5552 		return -ENOTSUPP;
5553 
5554 	return phylink_ethtool_ksettings_set(port->phylink, cmd);
5555 }
5556 
5557 static int mvpp2_ethtool_get_rxnfc(struct net_device *dev,
5558 				   struct ethtool_rxnfc *info, u32 *rules)
5559 {
5560 	struct mvpp2_port *port = netdev_priv(dev);
5561 	int ret = 0, i, loc = 0;
5562 
5563 	if (!mvpp22_rss_is_supported(port))
5564 		return -EOPNOTSUPP;
5565 
5566 	switch (info->cmd) {
5567 	case ETHTOOL_GRXFH:
5568 		ret = mvpp2_ethtool_rxfh_get(port, info);
5569 		break;
5570 	case ETHTOOL_GRXRINGS:
5571 		info->data = port->nrxqs;
5572 		break;
5573 	case ETHTOOL_GRXCLSRLCNT:
5574 		info->rule_cnt = port->n_rfs_rules;
5575 		break;
5576 	case ETHTOOL_GRXCLSRULE:
5577 		ret = mvpp2_ethtool_cls_rule_get(port, info);
5578 		break;
5579 	case ETHTOOL_GRXCLSRLALL:
5580 		for (i = 0; i < MVPP2_N_RFS_ENTRIES_PER_FLOW; i++) {
5581 			if (port->rfs_rules[i])
5582 				rules[loc++] = i;
5583 		}
5584 		break;
5585 	default:
5586 		return -ENOTSUPP;
5587 	}
5588 
5589 	return ret;
5590 }
5591 
5592 static int mvpp2_ethtool_set_rxnfc(struct net_device *dev,
5593 				   struct ethtool_rxnfc *info)
5594 {
5595 	struct mvpp2_port *port = netdev_priv(dev);
5596 	int ret = 0;
5597 
5598 	if (!mvpp22_rss_is_supported(port))
5599 		return -EOPNOTSUPP;
5600 
5601 	switch (info->cmd) {
5602 	case ETHTOOL_SRXFH:
5603 		ret = mvpp2_ethtool_rxfh_set(port, info);
5604 		break;
5605 	case ETHTOOL_SRXCLSRLINS:
5606 		ret = mvpp2_ethtool_cls_rule_ins(port, info);
5607 		break;
5608 	case ETHTOOL_SRXCLSRLDEL:
5609 		ret = mvpp2_ethtool_cls_rule_del(port, info);
5610 		break;
5611 	default:
5612 		return -EOPNOTSUPP;
5613 	}
5614 	return ret;
5615 }
5616 
5617 static u32 mvpp2_ethtool_get_rxfh_indir_size(struct net_device *dev)
5618 {
5619 	struct mvpp2_port *port = netdev_priv(dev);
5620 
5621 	return mvpp22_rss_is_supported(port) ? MVPP22_RSS_TABLE_ENTRIES : 0;
5622 }
5623 
5624 static int mvpp2_ethtool_get_rxfh(struct net_device *dev, u32 *indir, u8 *key,
5625 				  u8 *hfunc)
5626 {
5627 	struct mvpp2_port *port = netdev_priv(dev);
5628 	int ret = 0;
5629 
5630 	if (!mvpp22_rss_is_supported(port))
5631 		return -EOPNOTSUPP;
5632 
5633 	if (indir)
5634 		ret = mvpp22_port_rss_ctx_indir_get(port, 0, indir);
5635 
5636 	if (hfunc)
5637 		*hfunc = ETH_RSS_HASH_CRC32;
5638 
5639 	return ret;
5640 }
5641 
5642 static int mvpp2_ethtool_set_rxfh(struct net_device *dev, const u32 *indir,
5643 				  const u8 *key, const u8 hfunc)
5644 {
5645 	struct mvpp2_port *port = netdev_priv(dev);
5646 	int ret = 0;
5647 
5648 	if (!mvpp22_rss_is_supported(port))
5649 		return -EOPNOTSUPP;
5650 
5651 	if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32)
5652 		return -EOPNOTSUPP;
5653 
5654 	if (key)
5655 		return -EOPNOTSUPP;
5656 
5657 	if (indir)
5658 		ret = mvpp22_port_rss_ctx_indir_set(port, 0, indir);
5659 
5660 	return ret;
5661 }
5662 
5663 static int mvpp2_ethtool_get_rxfh_context(struct net_device *dev, u32 *indir,
5664 					  u8 *key, u8 *hfunc, u32 rss_context)
5665 {
5666 	struct mvpp2_port *port = netdev_priv(dev);
5667 	int ret = 0;
5668 
5669 	if (!mvpp22_rss_is_supported(port))
5670 		return -EOPNOTSUPP;
5671 	if (rss_context >= MVPP22_N_RSS_TABLES)
5672 		return -EINVAL;
5673 
5674 	if (hfunc)
5675 		*hfunc = ETH_RSS_HASH_CRC32;
5676 
5677 	if (indir)
5678 		ret = mvpp22_port_rss_ctx_indir_get(port, rss_context, indir);
5679 
5680 	return ret;
5681 }
5682 
5683 static int mvpp2_ethtool_set_rxfh_context(struct net_device *dev,
5684 					  const u32 *indir, const u8 *key,
5685 					  const u8 hfunc, u32 *rss_context,
5686 					  bool delete)
5687 {
5688 	struct mvpp2_port *port = netdev_priv(dev);
5689 	int ret;
5690 
5691 	if (!mvpp22_rss_is_supported(port))
5692 		return -EOPNOTSUPP;
5693 
5694 	if (hfunc != ETH_RSS_HASH_NO_CHANGE && hfunc != ETH_RSS_HASH_CRC32)
5695 		return -EOPNOTSUPP;
5696 
5697 	if (key)
5698 		return -EOPNOTSUPP;
5699 
5700 	if (delete)
5701 		return mvpp22_port_rss_ctx_delete(port, *rss_context);
5702 
5703 	if (*rss_context == ETH_RXFH_CONTEXT_ALLOC) {
5704 		ret = mvpp22_port_rss_ctx_create(port, rss_context);
5705 		if (ret)
5706 			return ret;
5707 	}
5708 
5709 	return mvpp22_port_rss_ctx_indir_set(port, *rss_context, indir);
5710 }
5711 /* Device ops */
5712 
5713 static const struct net_device_ops mvpp2_netdev_ops = {
5714 	.ndo_open		= mvpp2_open,
5715 	.ndo_stop		= mvpp2_stop,
5716 	.ndo_start_xmit		= mvpp2_tx,
5717 	.ndo_set_rx_mode	= mvpp2_set_rx_mode,
5718 	.ndo_set_mac_address	= mvpp2_set_mac_address,
5719 	.ndo_change_mtu		= mvpp2_change_mtu,
5720 	.ndo_get_stats64	= mvpp2_get_stats64,
5721 	.ndo_eth_ioctl		= mvpp2_ioctl,
5722 	.ndo_vlan_rx_add_vid	= mvpp2_vlan_rx_add_vid,
5723 	.ndo_vlan_rx_kill_vid	= mvpp2_vlan_rx_kill_vid,
5724 	.ndo_set_features	= mvpp2_set_features,
5725 	.ndo_bpf		= mvpp2_xdp,
5726 	.ndo_xdp_xmit		= mvpp2_xdp_xmit,
5727 };
5728 
5729 static const struct ethtool_ops mvpp2_eth_tool_ops = {
5730 	.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
5731 				     ETHTOOL_COALESCE_MAX_FRAMES,
5732 	.nway_reset		= mvpp2_ethtool_nway_reset,
5733 	.get_link		= ethtool_op_get_link,
5734 	.get_ts_info		= mvpp2_ethtool_get_ts_info,
5735 	.set_coalesce		= mvpp2_ethtool_set_coalesce,
5736 	.get_coalesce		= mvpp2_ethtool_get_coalesce,
5737 	.get_drvinfo		= mvpp2_ethtool_get_drvinfo,
5738 	.get_ringparam		= mvpp2_ethtool_get_ringparam,
5739 	.set_ringparam		= mvpp2_ethtool_set_ringparam,
5740 	.get_strings		= mvpp2_ethtool_get_strings,
5741 	.get_ethtool_stats	= mvpp2_ethtool_get_stats,
5742 	.get_sset_count		= mvpp2_ethtool_get_sset_count,
5743 	.get_pauseparam		= mvpp2_ethtool_get_pause_param,
5744 	.set_pauseparam		= mvpp2_ethtool_set_pause_param,
5745 	.get_link_ksettings	= mvpp2_ethtool_get_link_ksettings,
5746 	.set_link_ksettings	= mvpp2_ethtool_set_link_ksettings,
5747 	.get_rxnfc		= mvpp2_ethtool_get_rxnfc,
5748 	.set_rxnfc		= mvpp2_ethtool_set_rxnfc,
5749 	.get_rxfh_indir_size	= mvpp2_ethtool_get_rxfh_indir_size,
5750 	.get_rxfh		= mvpp2_ethtool_get_rxfh,
5751 	.set_rxfh		= mvpp2_ethtool_set_rxfh,
5752 	.get_rxfh_context	= mvpp2_ethtool_get_rxfh_context,
5753 	.set_rxfh_context	= mvpp2_ethtool_set_rxfh_context,
5754 };
5755 
5756 /* Used for PPv2.1, or PPv2.2 with the old Device Tree binding that
5757  * had a single IRQ defined per-port.
5758  */
5759 static int mvpp2_simple_queue_vectors_init(struct mvpp2_port *port,
5760 					   struct device_node *port_node)
5761 {
5762 	struct mvpp2_queue_vector *v = &port->qvecs[0];
5763 
5764 	v->first_rxq = 0;
5765 	v->nrxqs = port->nrxqs;
5766 	v->type = MVPP2_QUEUE_VECTOR_SHARED;
5767 	v->sw_thread_id = 0;
5768 	v->sw_thread_mask = *cpumask_bits(cpu_online_mask);
5769 	v->port = port;
5770 	v->irq = irq_of_parse_and_map(port_node, 0);
5771 	if (v->irq <= 0)
5772 		return -EINVAL;
5773 	netif_napi_add(port->dev, &v->napi, mvpp2_poll);
5774 
5775 	port->nqvecs = 1;
5776 
5777 	return 0;
5778 }
5779 
5780 static int mvpp2_multi_queue_vectors_init(struct mvpp2_port *port,
5781 					  struct device_node *port_node)
5782 {
5783 	struct mvpp2 *priv = port->priv;
5784 	struct mvpp2_queue_vector *v;
5785 	int i, ret;
5786 
5787 	switch (queue_mode) {
5788 	case MVPP2_QDIST_SINGLE_MODE:
5789 		port->nqvecs = priv->nthreads + 1;
5790 		break;
5791 	case MVPP2_QDIST_MULTI_MODE:
5792 		port->nqvecs = priv->nthreads;
5793 		break;
5794 	}
5795 
5796 	for (i = 0; i < port->nqvecs; i++) {
5797 		char irqname[16];
5798 
5799 		v = port->qvecs + i;
5800 
5801 		v->port = port;
5802 		v->type = MVPP2_QUEUE_VECTOR_PRIVATE;
5803 		v->sw_thread_id = i;
5804 		v->sw_thread_mask = BIT(i);
5805 
5806 		if (port->flags & MVPP2_F_DT_COMPAT)
5807 			snprintf(irqname, sizeof(irqname), "tx-cpu%d", i);
5808 		else
5809 			snprintf(irqname, sizeof(irqname), "hif%d", i);
5810 
5811 		if (queue_mode == MVPP2_QDIST_MULTI_MODE) {
5812 			v->first_rxq = i;
5813 			v->nrxqs = 1;
5814 		} else if (queue_mode == MVPP2_QDIST_SINGLE_MODE &&
5815 			   i == (port->nqvecs - 1)) {
5816 			v->first_rxq = 0;
5817 			v->nrxqs = port->nrxqs;
5818 			v->type = MVPP2_QUEUE_VECTOR_SHARED;
5819 
5820 			if (port->flags & MVPP2_F_DT_COMPAT)
5821 				strncpy(irqname, "rx-shared", sizeof(irqname));
5822 		}
5823 
5824 		if (port_node)
5825 			v->irq = of_irq_get_byname(port_node, irqname);
5826 		else
5827 			v->irq = fwnode_irq_get(port->fwnode, i);
5828 		if (v->irq <= 0) {
5829 			ret = -EINVAL;
5830 			goto err;
5831 		}
5832 
5833 		netif_napi_add(port->dev, &v->napi, mvpp2_poll);
5834 	}
5835 
5836 	return 0;
5837 
5838 err:
5839 	for (i = 0; i < port->nqvecs; i++)
5840 		irq_dispose_mapping(port->qvecs[i].irq);
5841 	return ret;
5842 }
5843 
5844 static int mvpp2_queue_vectors_init(struct mvpp2_port *port,
5845 				    struct device_node *port_node)
5846 {
5847 	if (port->has_tx_irqs)
5848 		return mvpp2_multi_queue_vectors_init(port, port_node);
5849 	else
5850 		return mvpp2_simple_queue_vectors_init(port, port_node);
5851 }
5852 
5853 static void mvpp2_queue_vectors_deinit(struct mvpp2_port *port)
5854 {
5855 	int i;
5856 
5857 	for (i = 0; i < port->nqvecs; i++)
5858 		irq_dispose_mapping(port->qvecs[i].irq);
5859 }
5860 
5861 /* Configure Rx queue group interrupt for this port */
5862 static void mvpp2_rx_irqs_setup(struct mvpp2_port *port)
5863 {
5864 	struct mvpp2 *priv = port->priv;
5865 	u32 val;
5866 	int i;
5867 
5868 	if (priv->hw_version == MVPP21) {
5869 		mvpp2_write(priv, MVPP21_ISR_RXQ_GROUP_REG(port->id),
5870 			    port->nrxqs);
5871 		return;
5872 	}
5873 
5874 	/* Handle the more complicated PPv2.2 and PPv2.3 case */
5875 	for (i = 0; i < port->nqvecs; i++) {
5876 		struct mvpp2_queue_vector *qv = port->qvecs + i;
5877 
5878 		if (!qv->nrxqs)
5879 			continue;
5880 
5881 		val = qv->sw_thread_id;
5882 		val |= port->id << MVPP22_ISR_RXQ_GROUP_INDEX_GROUP_OFFSET;
5883 		mvpp2_write(priv, MVPP22_ISR_RXQ_GROUP_INDEX_REG, val);
5884 
5885 		val = qv->first_rxq;
5886 		val |= qv->nrxqs << MVPP22_ISR_RXQ_SUB_GROUP_SIZE_OFFSET;
5887 		mvpp2_write(priv, MVPP22_ISR_RXQ_SUB_GROUP_CONFIG_REG, val);
5888 	}
5889 }
5890 
5891 /* Initialize port HW */
5892 static int mvpp2_port_init(struct mvpp2_port *port)
5893 {
5894 	struct device *dev = port->dev->dev.parent;
5895 	struct mvpp2 *priv = port->priv;
5896 	struct mvpp2_txq_pcpu *txq_pcpu;
5897 	unsigned int thread;
5898 	int queue, err, val;
5899 
5900 	/* Checks for hardware constraints */
5901 	if (port->first_rxq + port->nrxqs >
5902 	    MVPP2_MAX_PORTS * priv->max_port_rxqs)
5903 		return -EINVAL;
5904 
5905 	if (port->nrxqs > priv->max_port_rxqs || port->ntxqs > MVPP2_MAX_TXQ)
5906 		return -EINVAL;
5907 
5908 	/* Disable port */
5909 	mvpp2_egress_disable(port);
5910 	mvpp2_port_disable(port);
5911 
5912 	if (mvpp2_is_xlg(port->phy_interface)) {
5913 		val = readl(port->base + MVPP22_XLG_CTRL0_REG);
5914 		val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS;
5915 		val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN;
5916 		writel(val, port->base + MVPP22_XLG_CTRL0_REG);
5917 	} else {
5918 		val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
5919 		val &= ~MVPP2_GMAC_FORCE_LINK_PASS;
5920 		val |= MVPP2_GMAC_FORCE_LINK_DOWN;
5921 		writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
5922 	}
5923 
5924 	port->tx_time_coal = MVPP2_TXDONE_COAL_USEC;
5925 
5926 	port->txqs = devm_kcalloc(dev, port->ntxqs, sizeof(*port->txqs),
5927 				  GFP_KERNEL);
5928 	if (!port->txqs)
5929 		return -ENOMEM;
5930 
5931 	/* Associate physical Tx queues to this port and initialize.
5932 	 * The mapping is predefined.
5933 	 */
5934 	for (queue = 0; queue < port->ntxqs; queue++) {
5935 		int queue_phy_id = mvpp2_txq_phys(port->id, queue);
5936 		struct mvpp2_tx_queue *txq;
5937 
5938 		txq = devm_kzalloc(dev, sizeof(*txq), GFP_KERNEL);
5939 		if (!txq) {
5940 			err = -ENOMEM;
5941 			goto err_free_percpu;
5942 		}
5943 
5944 		txq->pcpu = alloc_percpu(struct mvpp2_txq_pcpu);
5945 		if (!txq->pcpu) {
5946 			err = -ENOMEM;
5947 			goto err_free_percpu;
5948 		}
5949 
5950 		txq->id = queue_phy_id;
5951 		txq->log_id = queue;
5952 		txq->done_pkts_coal = MVPP2_TXDONE_COAL_PKTS_THRESH;
5953 		for (thread = 0; thread < priv->nthreads; thread++) {
5954 			txq_pcpu = per_cpu_ptr(txq->pcpu, thread);
5955 			txq_pcpu->thread = thread;
5956 		}
5957 
5958 		port->txqs[queue] = txq;
5959 	}
5960 
5961 	port->rxqs = devm_kcalloc(dev, port->nrxqs, sizeof(*port->rxqs),
5962 				  GFP_KERNEL);
5963 	if (!port->rxqs) {
5964 		err = -ENOMEM;
5965 		goto err_free_percpu;
5966 	}
5967 
5968 	/* Allocate and initialize Rx queue for this port */
5969 	for (queue = 0; queue < port->nrxqs; queue++) {
5970 		struct mvpp2_rx_queue *rxq;
5971 
5972 		/* Map physical Rx queue to port's logical Rx queue */
5973 		rxq = devm_kzalloc(dev, sizeof(*rxq), GFP_KERNEL);
5974 		if (!rxq) {
5975 			err = -ENOMEM;
5976 			goto err_free_percpu;
5977 		}
5978 		/* Map this Rx queue to a physical queue */
5979 		rxq->id = port->first_rxq + queue;
5980 		rxq->port = port->id;
5981 		rxq->logic_rxq = queue;
5982 
5983 		port->rxqs[queue] = rxq;
5984 	}
5985 
5986 	mvpp2_rx_irqs_setup(port);
5987 
5988 	/* Create Rx descriptor rings */
5989 	for (queue = 0; queue < port->nrxqs; queue++) {
5990 		struct mvpp2_rx_queue *rxq = port->rxqs[queue];
5991 
5992 		rxq->size = port->rx_ring_size;
5993 		rxq->pkts_coal = MVPP2_RX_COAL_PKTS;
5994 		rxq->time_coal = MVPP2_RX_COAL_USEC;
5995 	}
5996 
5997 	mvpp2_ingress_disable(port);
5998 
5999 	/* Port default configuration */
6000 	mvpp2_defaults_set(port);
6001 
6002 	/* Port's classifier configuration */
6003 	mvpp2_cls_oversize_rxq_set(port);
6004 	mvpp2_cls_port_config(port);
6005 
6006 	if (mvpp22_rss_is_supported(port))
6007 		mvpp22_port_rss_init(port);
6008 
6009 	/* Provide an initial Rx packet size */
6010 	port->pkt_size = MVPP2_RX_PKT_SIZE(port->dev->mtu);
6011 
6012 	/* Initialize pools for swf */
6013 	err = mvpp2_swf_bm_pool_init(port);
6014 	if (err)
6015 		goto err_free_percpu;
6016 
6017 	/* Clear all port stats */
6018 	mvpp2_read_stats(port);
6019 	memset(port->ethtool_stats, 0,
6020 	       MVPP2_N_ETHTOOL_STATS(port->ntxqs, port->nrxqs) * sizeof(u64));
6021 
6022 	return 0;
6023 
6024 err_free_percpu:
6025 	for (queue = 0; queue < port->ntxqs; queue++) {
6026 		if (!port->txqs[queue])
6027 			continue;
6028 		free_percpu(port->txqs[queue]->pcpu);
6029 	}
6030 	return err;
6031 }
6032 
6033 static bool mvpp22_port_has_legacy_tx_irqs(struct device_node *port_node,
6034 					   unsigned long *flags)
6035 {
6036 	char *irqs[5] = { "rx-shared", "tx-cpu0", "tx-cpu1", "tx-cpu2",
6037 			  "tx-cpu3" };
6038 	int i;
6039 
6040 	for (i = 0; i < 5; i++)
6041 		if (of_property_match_string(port_node, "interrupt-names",
6042 					     irqs[i]) < 0)
6043 			return false;
6044 
6045 	*flags |= MVPP2_F_DT_COMPAT;
6046 	return true;
6047 }
6048 
6049 /* Checks if the port dt description has the required Tx interrupts:
6050  * - PPv2.1: there are no such interrupts.
6051  * - PPv2.2 and PPv2.3:
6052  *   - The old DTs have: "rx-shared", "tx-cpuX" with X in [0...3]
6053  *   - The new ones have: "hifX" with X in [0..8]
6054  *
6055  * All those variants are supported to keep the backward compatibility.
6056  */
6057 static bool mvpp2_port_has_irqs(struct mvpp2 *priv,
6058 				struct device_node *port_node,
6059 				unsigned long *flags)
6060 {
6061 	char name[5];
6062 	int i;
6063 
6064 	/* ACPI */
6065 	if (!port_node)
6066 		return true;
6067 
6068 	if (priv->hw_version == MVPP21)
6069 		return false;
6070 
6071 	if (mvpp22_port_has_legacy_tx_irqs(port_node, flags))
6072 		return true;
6073 
6074 	for (i = 0; i < MVPP2_MAX_THREADS; i++) {
6075 		snprintf(name, 5, "hif%d", i);
6076 		if (of_property_match_string(port_node, "interrupt-names",
6077 					     name) < 0)
6078 			return false;
6079 	}
6080 
6081 	return true;
6082 }
6083 
6084 static void mvpp2_port_copy_mac_addr(struct net_device *dev, struct mvpp2 *priv,
6085 				     struct fwnode_handle *fwnode,
6086 				     char **mac_from)
6087 {
6088 	struct mvpp2_port *port = netdev_priv(dev);
6089 	char hw_mac_addr[ETH_ALEN] = {0};
6090 	char fw_mac_addr[ETH_ALEN];
6091 
6092 	if (!fwnode_get_mac_address(fwnode, fw_mac_addr)) {
6093 		*mac_from = "firmware node";
6094 		eth_hw_addr_set(dev, fw_mac_addr);
6095 		return;
6096 	}
6097 
6098 	if (priv->hw_version == MVPP21) {
6099 		mvpp21_get_mac_address(port, hw_mac_addr);
6100 		if (is_valid_ether_addr(hw_mac_addr)) {
6101 			*mac_from = "hardware";
6102 			eth_hw_addr_set(dev, hw_mac_addr);
6103 			return;
6104 		}
6105 	}
6106 
6107 	*mac_from = "random";
6108 	eth_hw_addr_random(dev);
6109 }
6110 
6111 static struct mvpp2_port *mvpp2_phylink_to_port(struct phylink_config *config)
6112 {
6113 	return container_of(config, struct mvpp2_port, phylink_config);
6114 }
6115 
6116 static struct mvpp2_port *mvpp2_pcs_xlg_to_port(struct phylink_pcs *pcs)
6117 {
6118 	return container_of(pcs, struct mvpp2_port, pcs_xlg);
6119 }
6120 
6121 static struct mvpp2_port *mvpp2_pcs_gmac_to_port(struct phylink_pcs *pcs)
6122 {
6123 	return container_of(pcs, struct mvpp2_port, pcs_gmac);
6124 }
6125 
6126 static void mvpp2_xlg_pcs_get_state(struct phylink_pcs *pcs,
6127 				    struct phylink_link_state *state)
6128 {
6129 	struct mvpp2_port *port = mvpp2_pcs_xlg_to_port(pcs);
6130 	u32 val;
6131 
6132 	if (port->phy_interface == PHY_INTERFACE_MODE_5GBASER)
6133 		state->speed = SPEED_5000;
6134 	else
6135 		state->speed = SPEED_10000;
6136 	state->duplex = 1;
6137 	state->an_complete = 1;
6138 
6139 	val = readl(port->base + MVPP22_XLG_STATUS);
6140 	state->link = !!(val & MVPP22_XLG_STATUS_LINK_UP);
6141 
6142 	state->pause = 0;
6143 	val = readl(port->base + MVPP22_XLG_CTRL0_REG);
6144 	if (val & MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN)
6145 		state->pause |= MLO_PAUSE_TX;
6146 	if (val & MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN)
6147 		state->pause |= MLO_PAUSE_RX;
6148 }
6149 
6150 static int mvpp2_xlg_pcs_config(struct phylink_pcs *pcs,
6151 				unsigned int mode,
6152 				phy_interface_t interface,
6153 				const unsigned long *advertising,
6154 				bool permit_pause_to_mac)
6155 {
6156 	return 0;
6157 }
6158 
6159 static const struct phylink_pcs_ops mvpp2_phylink_xlg_pcs_ops = {
6160 	.pcs_get_state = mvpp2_xlg_pcs_get_state,
6161 	.pcs_config = mvpp2_xlg_pcs_config,
6162 };
6163 
6164 static int mvpp2_gmac_pcs_validate(struct phylink_pcs *pcs,
6165 				   unsigned long *supported,
6166 				   const struct phylink_link_state *state)
6167 {
6168 	/* When in 802.3z mode, we must have AN enabled:
6169 	 * Bit 2 Field InBandAnEn In-band Auto-Negotiation enable. ...
6170 	 * When <PortType> = 1 (1000BASE-X) this field must be set to 1.
6171 	 */
6172 	if (phy_interface_mode_is_8023z(state->interface) &&
6173 	    !phylink_test(state->advertising, Autoneg))
6174 		return -EINVAL;
6175 
6176 	return 0;
6177 }
6178 
6179 static void mvpp2_gmac_pcs_get_state(struct phylink_pcs *pcs,
6180 				     struct phylink_link_state *state)
6181 {
6182 	struct mvpp2_port *port = mvpp2_pcs_gmac_to_port(pcs);
6183 	u32 val;
6184 
6185 	val = readl(port->base + MVPP2_GMAC_STATUS0);
6186 
6187 	state->an_complete = !!(val & MVPP2_GMAC_STATUS0_AN_COMPLETE);
6188 	state->link = !!(val & MVPP2_GMAC_STATUS0_LINK_UP);
6189 	state->duplex = !!(val & MVPP2_GMAC_STATUS0_FULL_DUPLEX);
6190 
6191 	switch (port->phy_interface) {
6192 	case PHY_INTERFACE_MODE_1000BASEX:
6193 		state->speed = SPEED_1000;
6194 		break;
6195 	case PHY_INTERFACE_MODE_2500BASEX:
6196 		state->speed = SPEED_2500;
6197 		break;
6198 	default:
6199 		if (val & MVPP2_GMAC_STATUS0_GMII_SPEED)
6200 			state->speed = SPEED_1000;
6201 		else if (val & MVPP2_GMAC_STATUS0_MII_SPEED)
6202 			state->speed = SPEED_100;
6203 		else
6204 			state->speed = SPEED_10;
6205 	}
6206 
6207 	state->pause = 0;
6208 	if (val & MVPP2_GMAC_STATUS0_RX_PAUSE)
6209 		state->pause |= MLO_PAUSE_RX;
6210 	if (val & MVPP2_GMAC_STATUS0_TX_PAUSE)
6211 		state->pause |= MLO_PAUSE_TX;
6212 }
6213 
6214 static int mvpp2_gmac_pcs_config(struct phylink_pcs *pcs, unsigned int mode,
6215 				 phy_interface_t interface,
6216 				 const unsigned long *advertising,
6217 				 bool permit_pause_to_mac)
6218 {
6219 	struct mvpp2_port *port = mvpp2_pcs_gmac_to_port(pcs);
6220 	u32 mask, val, an, old_an, changed;
6221 
6222 	mask = MVPP2_GMAC_IN_BAND_AUTONEG_BYPASS |
6223 	       MVPP2_GMAC_IN_BAND_AUTONEG |
6224 	       MVPP2_GMAC_AN_SPEED_EN |
6225 	       MVPP2_GMAC_FLOW_CTRL_AUTONEG |
6226 	       MVPP2_GMAC_AN_DUPLEX_EN;
6227 
6228 	if (phylink_autoneg_inband(mode)) {
6229 		mask |= MVPP2_GMAC_CONFIG_MII_SPEED |
6230 			MVPP2_GMAC_CONFIG_GMII_SPEED |
6231 			MVPP2_GMAC_CONFIG_FULL_DUPLEX;
6232 		val = MVPP2_GMAC_IN_BAND_AUTONEG;
6233 
6234 		if (interface == PHY_INTERFACE_MODE_SGMII) {
6235 			/* SGMII mode receives the speed and duplex from PHY */
6236 			val |= MVPP2_GMAC_AN_SPEED_EN |
6237 			       MVPP2_GMAC_AN_DUPLEX_EN;
6238 		} else {
6239 			/* 802.3z mode has fixed speed and duplex */
6240 			val |= MVPP2_GMAC_CONFIG_GMII_SPEED |
6241 			       MVPP2_GMAC_CONFIG_FULL_DUPLEX;
6242 
6243 			/* The FLOW_CTRL_AUTONEG bit selects either the hardware
6244 			 * automatically or the bits in MVPP22_GMAC_CTRL_4_REG
6245 			 * manually controls the GMAC pause modes.
6246 			 */
6247 			if (permit_pause_to_mac)
6248 				val |= MVPP2_GMAC_FLOW_CTRL_AUTONEG;
6249 
6250 			/* Configure advertisement bits */
6251 			mask |= MVPP2_GMAC_FC_ADV_EN | MVPP2_GMAC_FC_ADV_ASM_EN;
6252 			if (phylink_test(advertising, Pause))
6253 				val |= MVPP2_GMAC_FC_ADV_EN;
6254 			if (phylink_test(advertising, Asym_Pause))
6255 				val |= MVPP2_GMAC_FC_ADV_ASM_EN;
6256 		}
6257 	} else {
6258 		val = 0;
6259 	}
6260 
6261 	old_an = an = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6262 	an = (an & ~mask) | val;
6263 	changed = an ^ old_an;
6264 	if (changed)
6265 		writel(an, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6266 
6267 	/* We are only interested in the advertisement bits changing */
6268 	return changed & (MVPP2_GMAC_FC_ADV_EN | MVPP2_GMAC_FC_ADV_ASM_EN);
6269 }
6270 
6271 static void mvpp2_gmac_pcs_an_restart(struct phylink_pcs *pcs)
6272 {
6273 	struct mvpp2_port *port = mvpp2_pcs_gmac_to_port(pcs);
6274 	u32 val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6275 
6276 	writel(val | MVPP2_GMAC_IN_BAND_RESTART_AN,
6277 	       port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6278 	writel(val & ~MVPP2_GMAC_IN_BAND_RESTART_AN,
6279 	       port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6280 }
6281 
6282 static const struct phylink_pcs_ops mvpp2_phylink_gmac_pcs_ops = {
6283 	.pcs_validate = mvpp2_gmac_pcs_validate,
6284 	.pcs_get_state = mvpp2_gmac_pcs_get_state,
6285 	.pcs_config = mvpp2_gmac_pcs_config,
6286 	.pcs_an_restart = mvpp2_gmac_pcs_an_restart,
6287 };
6288 
6289 static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode,
6290 			     const struct phylink_link_state *state)
6291 {
6292 	u32 val;
6293 
6294 	mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG,
6295 		     MVPP22_XLG_CTRL0_MAC_RESET_DIS,
6296 		     MVPP22_XLG_CTRL0_MAC_RESET_DIS);
6297 	mvpp2_modify(port->base + MVPP22_XLG_CTRL4_REG,
6298 		     MVPP22_XLG_CTRL4_MACMODSELECT_GMAC |
6299 		     MVPP22_XLG_CTRL4_EN_IDLE_CHECK |
6300 		     MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC,
6301 		     MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC);
6302 
6303 	/* Wait for reset to deassert */
6304 	do {
6305 		val = readl(port->base + MVPP22_XLG_CTRL0_REG);
6306 	} while (!(val & MVPP22_XLG_CTRL0_MAC_RESET_DIS));
6307 }
6308 
6309 static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode,
6310 			      const struct phylink_link_state *state)
6311 {
6312 	u32 old_ctrl0, ctrl0;
6313 	u32 old_ctrl2, ctrl2;
6314 	u32 old_ctrl4, ctrl4;
6315 
6316 	old_ctrl0 = ctrl0 = readl(port->base + MVPP2_GMAC_CTRL_0_REG);
6317 	old_ctrl2 = ctrl2 = readl(port->base + MVPP2_GMAC_CTRL_2_REG);
6318 	old_ctrl4 = ctrl4 = readl(port->base + MVPP22_GMAC_CTRL_4_REG);
6319 
6320 	ctrl0 &= ~MVPP2_GMAC_PORT_TYPE_MASK;
6321 	ctrl2 &= ~(MVPP2_GMAC_INBAND_AN_MASK | MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_FLOW_CTRL_MASK);
6322 
6323 	/* Configure port type */
6324 	if (phy_interface_mode_is_8023z(state->interface)) {
6325 		ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK;
6326 		ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL;
6327 		ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS |
6328 			 MVPP22_CTRL4_DP_CLK_SEL |
6329 			 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE;
6330 	} else if (state->interface == PHY_INTERFACE_MODE_SGMII) {
6331 		ctrl2 |= MVPP2_GMAC_PCS_ENABLE_MASK | MVPP2_GMAC_INBAND_AN_MASK;
6332 		ctrl4 &= ~MVPP22_CTRL4_EXT_PIN_GMII_SEL;
6333 		ctrl4 |= MVPP22_CTRL4_SYNC_BYPASS_DIS |
6334 			 MVPP22_CTRL4_DP_CLK_SEL |
6335 			 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE;
6336 	} else if (phy_interface_mode_is_rgmii(state->interface)) {
6337 		ctrl4 &= ~MVPP22_CTRL4_DP_CLK_SEL;
6338 		ctrl4 |= MVPP22_CTRL4_EXT_PIN_GMII_SEL |
6339 			 MVPP22_CTRL4_SYNC_BYPASS_DIS |
6340 			 MVPP22_CTRL4_QSGMII_BYPASS_ACTIVE;
6341 	}
6342 
6343 	/* Configure negotiation style */
6344 	if (!phylink_autoneg_inband(mode)) {
6345 		/* Phy or fixed speed - no in-band AN, nothing to do, leave the
6346 		 * configured speed, duplex and flow control as-is.
6347 		 */
6348 	} else if (state->interface == PHY_INTERFACE_MODE_SGMII) {
6349 		/* SGMII in-band mode receives the speed and duplex from
6350 		 * the PHY. Flow control information is not received. */
6351 	} else if (phy_interface_mode_is_8023z(state->interface)) {
6352 		/* 1000BaseX and 2500BaseX ports cannot negotiate speed nor can
6353 		 * they negotiate duplex: they are always operating with a fixed
6354 		 * speed of 1000/2500Mbps in full duplex, so force 1000/2500
6355 		 * speed and full duplex here.
6356 		 */
6357 		ctrl0 |= MVPP2_GMAC_PORT_TYPE_MASK;
6358 	}
6359 
6360 	if (old_ctrl0 != ctrl0)
6361 		writel(ctrl0, port->base + MVPP2_GMAC_CTRL_0_REG);
6362 	if (old_ctrl2 != ctrl2)
6363 		writel(ctrl2, port->base + MVPP2_GMAC_CTRL_2_REG);
6364 	if (old_ctrl4 != ctrl4)
6365 		writel(ctrl4, port->base + MVPP22_GMAC_CTRL_4_REG);
6366 }
6367 
6368 static struct phylink_pcs *mvpp2_select_pcs(struct phylink_config *config,
6369 					    phy_interface_t interface)
6370 {
6371 	struct mvpp2_port *port = mvpp2_phylink_to_port(config);
6372 
6373 	/* Select the appropriate PCS operations depending on the
6374 	 * configured interface mode. We will only switch to a mode
6375 	 * that the validate() checks have already passed.
6376 	 */
6377 	if (mvpp2_is_xlg(interface))
6378 		return &port->pcs_xlg;
6379 	else
6380 		return &port->pcs_gmac;
6381 }
6382 
6383 static int mvpp2_mac_prepare(struct phylink_config *config, unsigned int mode,
6384 			     phy_interface_t interface)
6385 {
6386 	struct mvpp2_port *port = mvpp2_phylink_to_port(config);
6387 
6388 	/* Check for invalid configuration */
6389 	if (mvpp2_is_xlg(interface) && port->gop_id != 0) {
6390 		netdev_err(port->dev, "Invalid mode on %s\n", port->dev->name);
6391 		return -EINVAL;
6392 	}
6393 
6394 	if (port->phy_interface != interface ||
6395 	    phylink_autoneg_inband(mode)) {
6396 		/* Force the link down when changing the interface or if in
6397 		 * in-band mode to ensure we do not change the configuration
6398 		 * while the hardware is indicating link is up. We force both
6399 		 * XLG and GMAC down to ensure that they're both in a known
6400 		 * state.
6401 		 */
6402 		mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG,
6403 			     MVPP2_GMAC_FORCE_LINK_PASS |
6404 			     MVPP2_GMAC_FORCE_LINK_DOWN,
6405 			     MVPP2_GMAC_FORCE_LINK_DOWN);
6406 
6407 		if (mvpp2_port_supports_xlg(port))
6408 			mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG,
6409 				     MVPP22_XLG_CTRL0_FORCE_LINK_PASS |
6410 				     MVPP22_XLG_CTRL0_FORCE_LINK_DOWN,
6411 				     MVPP22_XLG_CTRL0_FORCE_LINK_DOWN);
6412 	}
6413 
6414 	/* Make sure the port is disabled when reconfiguring the mode */
6415 	mvpp2_port_disable(port);
6416 
6417 	if (port->phy_interface != interface) {
6418 		/* Place GMAC into reset */
6419 		mvpp2_modify(port->base + MVPP2_GMAC_CTRL_2_REG,
6420 			     MVPP2_GMAC_PORT_RESET_MASK,
6421 			     MVPP2_GMAC_PORT_RESET_MASK);
6422 
6423 		if (port->priv->hw_version >= MVPP22) {
6424 			mvpp22_gop_mask_irq(port);
6425 
6426 			phy_power_off(port->comphy);
6427 
6428 			/* Reconfigure the serdes lanes */
6429 			mvpp22_mode_reconfigure(port, interface);
6430 		}
6431 	}
6432 
6433 	return 0;
6434 }
6435 
6436 static void mvpp2_mac_config(struct phylink_config *config, unsigned int mode,
6437 			     const struct phylink_link_state *state)
6438 {
6439 	struct mvpp2_port *port = mvpp2_phylink_to_port(config);
6440 
6441 	/* mac (re)configuration */
6442 	if (mvpp2_is_xlg(state->interface))
6443 		mvpp2_xlg_config(port, mode, state);
6444 	else if (phy_interface_mode_is_rgmii(state->interface) ||
6445 		 phy_interface_mode_is_8023z(state->interface) ||
6446 		 state->interface == PHY_INTERFACE_MODE_SGMII)
6447 		mvpp2_gmac_config(port, mode, state);
6448 
6449 	if (port->priv->hw_version == MVPP21 && port->flags & MVPP2_F_LOOPBACK)
6450 		mvpp2_port_loopback_set(port, state);
6451 }
6452 
6453 static int mvpp2_mac_finish(struct phylink_config *config, unsigned int mode,
6454 			    phy_interface_t interface)
6455 {
6456 	struct mvpp2_port *port = mvpp2_phylink_to_port(config);
6457 
6458 	if (port->priv->hw_version >= MVPP22 &&
6459 	    port->phy_interface != interface) {
6460 		port->phy_interface = interface;
6461 
6462 		/* Unmask interrupts */
6463 		mvpp22_gop_unmask_irq(port);
6464 	}
6465 
6466 	if (!mvpp2_is_xlg(interface)) {
6467 		/* Release GMAC reset and wait */
6468 		mvpp2_modify(port->base + MVPP2_GMAC_CTRL_2_REG,
6469 			     MVPP2_GMAC_PORT_RESET_MASK, 0);
6470 
6471 		while (readl(port->base + MVPP2_GMAC_CTRL_2_REG) &
6472 		       MVPP2_GMAC_PORT_RESET_MASK)
6473 			continue;
6474 	}
6475 
6476 	mvpp2_port_enable(port);
6477 
6478 	/* Allow the link to come up if in in-band mode, otherwise the
6479 	 * link is forced via mac_link_down()/mac_link_up()
6480 	 */
6481 	if (phylink_autoneg_inband(mode)) {
6482 		if (mvpp2_is_xlg(interface))
6483 			mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG,
6484 				     MVPP22_XLG_CTRL0_FORCE_LINK_PASS |
6485 				     MVPP22_XLG_CTRL0_FORCE_LINK_DOWN, 0);
6486 		else
6487 			mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG,
6488 				     MVPP2_GMAC_FORCE_LINK_PASS |
6489 				     MVPP2_GMAC_FORCE_LINK_DOWN, 0);
6490 	}
6491 
6492 	return 0;
6493 }
6494 
6495 static void mvpp2_mac_link_up(struct phylink_config *config,
6496 			      struct phy_device *phy,
6497 			      unsigned int mode, phy_interface_t interface,
6498 			      int speed, int duplex,
6499 			      bool tx_pause, bool rx_pause)
6500 {
6501 	struct mvpp2_port *port = mvpp2_phylink_to_port(config);
6502 	u32 val;
6503 	int i;
6504 
6505 	if (mvpp2_is_xlg(interface)) {
6506 		if (!phylink_autoneg_inband(mode)) {
6507 			val = MVPP22_XLG_CTRL0_FORCE_LINK_PASS;
6508 			if (tx_pause)
6509 				val |= MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN;
6510 			if (rx_pause)
6511 				val |= MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN;
6512 
6513 			mvpp2_modify(port->base + MVPP22_XLG_CTRL0_REG,
6514 				     MVPP22_XLG_CTRL0_FORCE_LINK_DOWN |
6515 				     MVPP22_XLG_CTRL0_FORCE_LINK_PASS |
6516 				     MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN |
6517 				     MVPP22_XLG_CTRL0_RX_FLOW_CTRL_EN, val);
6518 		}
6519 	} else {
6520 		if (!phylink_autoneg_inband(mode)) {
6521 			val = MVPP2_GMAC_FORCE_LINK_PASS;
6522 
6523 			if (speed == SPEED_1000 || speed == SPEED_2500)
6524 				val |= MVPP2_GMAC_CONFIG_GMII_SPEED;
6525 			else if (speed == SPEED_100)
6526 				val |= MVPP2_GMAC_CONFIG_MII_SPEED;
6527 
6528 			if (duplex == DUPLEX_FULL)
6529 				val |= MVPP2_GMAC_CONFIG_FULL_DUPLEX;
6530 
6531 			mvpp2_modify(port->base + MVPP2_GMAC_AUTONEG_CONFIG,
6532 				     MVPP2_GMAC_FORCE_LINK_DOWN |
6533 				     MVPP2_GMAC_FORCE_LINK_PASS |
6534 				     MVPP2_GMAC_CONFIG_MII_SPEED |
6535 				     MVPP2_GMAC_CONFIG_GMII_SPEED |
6536 				     MVPP2_GMAC_CONFIG_FULL_DUPLEX, val);
6537 		}
6538 
6539 		/* We can always update the flow control enable bits;
6540 		 * these will only be effective if flow control AN
6541 		 * (MVPP2_GMAC_FLOW_CTRL_AUTONEG) is disabled.
6542 		 */
6543 		val = 0;
6544 		if (tx_pause)
6545 			val |= MVPP22_CTRL4_TX_FC_EN;
6546 		if (rx_pause)
6547 			val |= MVPP22_CTRL4_RX_FC_EN;
6548 
6549 		mvpp2_modify(port->base + MVPP22_GMAC_CTRL_4_REG,
6550 			     MVPP22_CTRL4_RX_FC_EN | MVPP22_CTRL4_TX_FC_EN,
6551 			     val);
6552 	}
6553 
6554 	if (port->priv->global_tx_fc) {
6555 		port->tx_fc = tx_pause;
6556 		if (tx_pause)
6557 			mvpp2_rxq_enable_fc(port);
6558 		else
6559 			mvpp2_rxq_disable_fc(port);
6560 		if (port->priv->percpu_pools) {
6561 			for (i = 0; i < port->nrxqs; i++)
6562 				mvpp2_bm_pool_update_fc(port, &port->priv->bm_pools[i], tx_pause);
6563 		} else {
6564 			mvpp2_bm_pool_update_fc(port, port->pool_long, tx_pause);
6565 			mvpp2_bm_pool_update_fc(port, port->pool_short, tx_pause);
6566 		}
6567 		if (port->priv->hw_version == MVPP23)
6568 			mvpp23_rx_fifo_fc_en(port->priv, port->id, tx_pause);
6569 	}
6570 
6571 	mvpp2_port_enable(port);
6572 
6573 	mvpp2_egress_enable(port);
6574 	mvpp2_ingress_enable(port);
6575 	netif_tx_wake_all_queues(port->dev);
6576 }
6577 
6578 static void mvpp2_mac_link_down(struct phylink_config *config,
6579 				unsigned int mode, phy_interface_t interface)
6580 {
6581 	struct mvpp2_port *port = mvpp2_phylink_to_port(config);
6582 	u32 val;
6583 
6584 	if (!phylink_autoneg_inband(mode)) {
6585 		if (mvpp2_is_xlg(interface)) {
6586 			val = readl(port->base + MVPP22_XLG_CTRL0_REG);
6587 			val &= ~MVPP22_XLG_CTRL0_FORCE_LINK_PASS;
6588 			val |= MVPP22_XLG_CTRL0_FORCE_LINK_DOWN;
6589 			writel(val, port->base + MVPP22_XLG_CTRL0_REG);
6590 		} else {
6591 			val = readl(port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6592 			val &= ~MVPP2_GMAC_FORCE_LINK_PASS;
6593 			val |= MVPP2_GMAC_FORCE_LINK_DOWN;
6594 			writel(val, port->base + MVPP2_GMAC_AUTONEG_CONFIG);
6595 		}
6596 	}
6597 
6598 	netif_tx_stop_all_queues(port->dev);
6599 	mvpp2_egress_disable(port);
6600 	mvpp2_ingress_disable(port);
6601 
6602 	mvpp2_port_disable(port);
6603 }
6604 
6605 static const struct phylink_mac_ops mvpp2_phylink_ops = {
6606 	.validate = phylink_generic_validate,
6607 	.mac_select_pcs = mvpp2_select_pcs,
6608 	.mac_prepare = mvpp2_mac_prepare,
6609 	.mac_config = mvpp2_mac_config,
6610 	.mac_finish = mvpp2_mac_finish,
6611 	.mac_link_up = mvpp2_mac_link_up,
6612 	.mac_link_down = mvpp2_mac_link_down,
6613 };
6614 
6615 /* Work-around for ACPI */
6616 static void mvpp2_acpi_start(struct mvpp2_port *port)
6617 {
6618 	/* Phylink isn't used as of now for ACPI, so the MAC has to be
6619 	 * configured manually when the interface is started. This will
6620 	 * be removed as soon as the phylink ACPI support lands in.
6621 	 */
6622 	struct phylink_link_state state = {
6623 		.interface = port->phy_interface,
6624 	};
6625 	struct phylink_pcs *pcs;
6626 
6627 	pcs = mvpp2_select_pcs(&port->phylink_config, port->phy_interface);
6628 
6629 	mvpp2_mac_prepare(&port->phylink_config, MLO_AN_INBAND,
6630 			  port->phy_interface);
6631 	mvpp2_mac_config(&port->phylink_config, MLO_AN_INBAND, &state);
6632 	pcs->ops->pcs_config(pcs, MLO_AN_INBAND, port->phy_interface,
6633 			     state.advertising, false);
6634 	mvpp2_mac_finish(&port->phylink_config, MLO_AN_INBAND,
6635 			 port->phy_interface);
6636 	mvpp2_mac_link_up(&port->phylink_config, NULL,
6637 			  MLO_AN_INBAND, port->phy_interface,
6638 			  SPEED_UNKNOWN, DUPLEX_UNKNOWN, false, false);
6639 }
6640 
6641 /* In order to ensure backward compatibility for ACPI, check if the port
6642  * firmware node comprises the necessary description allowing to use phylink.
6643  */
6644 static bool mvpp2_use_acpi_compat_mode(struct fwnode_handle *port_fwnode)
6645 {
6646 	if (!is_acpi_node(port_fwnode))
6647 		return false;
6648 
6649 	return (!fwnode_property_present(port_fwnode, "phy-handle") &&
6650 		!fwnode_property_present(port_fwnode, "managed") &&
6651 		!fwnode_get_named_child_node(port_fwnode, "fixed-link"));
6652 }
6653 
6654 /* Ports initialization */
6655 static int mvpp2_port_probe(struct platform_device *pdev,
6656 			    struct fwnode_handle *port_fwnode,
6657 			    struct mvpp2 *priv)
6658 {
6659 	struct phy *comphy = NULL;
6660 	struct mvpp2_port *port;
6661 	struct mvpp2_port_pcpu *port_pcpu;
6662 	struct device_node *port_node = to_of_node(port_fwnode);
6663 	netdev_features_t features;
6664 	struct net_device *dev;
6665 	struct phylink *phylink;
6666 	char *mac_from = "";
6667 	unsigned int ntxqs, nrxqs, thread;
6668 	unsigned long flags = 0;
6669 	bool has_tx_irqs;
6670 	u32 id;
6671 	int phy_mode;
6672 	int err, i;
6673 
6674 	has_tx_irqs = mvpp2_port_has_irqs(priv, port_node, &flags);
6675 	if (!has_tx_irqs && queue_mode == MVPP2_QDIST_MULTI_MODE) {
6676 		dev_err(&pdev->dev,
6677 			"not enough IRQs to support multi queue mode\n");
6678 		return -EINVAL;
6679 	}
6680 
6681 	ntxqs = MVPP2_MAX_TXQ;
6682 	nrxqs = mvpp2_get_nrxqs(priv);
6683 
6684 	dev = alloc_etherdev_mqs(sizeof(*port), ntxqs, nrxqs);
6685 	if (!dev)
6686 		return -ENOMEM;
6687 
6688 	phy_mode = fwnode_get_phy_mode(port_fwnode);
6689 	if (phy_mode < 0) {
6690 		dev_err(&pdev->dev, "incorrect phy mode\n");
6691 		err = phy_mode;
6692 		goto err_free_netdev;
6693 	}
6694 
6695 	/*
6696 	 * Rewrite 10GBASE-KR to 10GBASE-R for compatibility with existing DT.
6697 	 * Existing usage of 10GBASE-KR is not correct; no backplane
6698 	 * negotiation is done, and this driver does not actually support
6699 	 * 10GBASE-KR.
6700 	 */
6701 	if (phy_mode == PHY_INTERFACE_MODE_10GKR)
6702 		phy_mode = PHY_INTERFACE_MODE_10GBASER;
6703 
6704 	if (port_node) {
6705 		comphy = devm_of_phy_get(&pdev->dev, port_node, NULL);
6706 		if (IS_ERR(comphy)) {
6707 			if (PTR_ERR(comphy) == -EPROBE_DEFER) {
6708 				err = -EPROBE_DEFER;
6709 				goto err_free_netdev;
6710 			}
6711 			comphy = NULL;
6712 		}
6713 	}
6714 
6715 	if (fwnode_property_read_u32(port_fwnode, "port-id", &id)) {
6716 		err = -EINVAL;
6717 		dev_err(&pdev->dev, "missing port-id value\n");
6718 		goto err_free_netdev;
6719 	}
6720 
6721 	dev->tx_queue_len = MVPP2_MAX_TXD_MAX;
6722 	dev->watchdog_timeo = 5 * HZ;
6723 	dev->netdev_ops = &mvpp2_netdev_ops;
6724 	dev->ethtool_ops = &mvpp2_eth_tool_ops;
6725 
6726 	port = netdev_priv(dev);
6727 	port->dev = dev;
6728 	port->fwnode = port_fwnode;
6729 	port->ntxqs = ntxqs;
6730 	port->nrxqs = nrxqs;
6731 	port->priv = priv;
6732 	port->has_tx_irqs = has_tx_irqs;
6733 	port->flags = flags;
6734 
6735 	err = mvpp2_queue_vectors_init(port, port_node);
6736 	if (err)
6737 		goto err_free_netdev;
6738 
6739 	if (port_node)
6740 		port->port_irq = of_irq_get_byname(port_node, "link");
6741 	else
6742 		port->port_irq = fwnode_irq_get(port_fwnode, port->nqvecs + 1);
6743 	if (port->port_irq == -EPROBE_DEFER) {
6744 		err = -EPROBE_DEFER;
6745 		goto err_deinit_qvecs;
6746 	}
6747 	if (port->port_irq <= 0)
6748 		/* the link irq is optional */
6749 		port->port_irq = 0;
6750 
6751 	if (fwnode_property_read_bool(port_fwnode, "marvell,loopback"))
6752 		port->flags |= MVPP2_F_LOOPBACK;
6753 
6754 	port->id = id;
6755 	if (priv->hw_version == MVPP21)
6756 		port->first_rxq = port->id * port->nrxqs;
6757 	else
6758 		port->first_rxq = port->id * priv->max_port_rxqs;
6759 
6760 	port->of_node = port_node;
6761 	port->phy_interface = phy_mode;
6762 	port->comphy = comphy;
6763 
6764 	if (priv->hw_version == MVPP21) {
6765 		port->base = devm_platform_ioremap_resource(pdev, 2 + id);
6766 		if (IS_ERR(port->base)) {
6767 			err = PTR_ERR(port->base);
6768 			goto err_free_irq;
6769 		}
6770 
6771 		port->stats_base = port->priv->lms_base +
6772 				   MVPP21_MIB_COUNTERS_OFFSET +
6773 				   port->gop_id * MVPP21_MIB_COUNTERS_PORT_SZ;
6774 	} else {
6775 		if (fwnode_property_read_u32(port_fwnode, "gop-port-id",
6776 					     &port->gop_id)) {
6777 			err = -EINVAL;
6778 			dev_err(&pdev->dev, "missing gop-port-id value\n");
6779 			goto err_deinit_qvecs;
6780 		}
6781 
6782 		port->base = priv->iface_base + MVPP22_GMAC_BASE(port->gop_id);
6783 		port->stats_base = port->priv->iface_base +
6784 				   MVPP22_MIB_COUNTERS_OFFSET +
6785 				   port->gop_id * MVPP22_MIB_COUNTERS_PORT_SZ;
6786 
6787 		/* We may want a property to describe whether we should use
6788 		 * MAC hardware timestamping.
6789 		 */
6790 		if (priv->tai)
6791 			port->hwtstamp = true;
6792 	}
6793 
6794 	/* Alloc per-cpu and ethtool stats */
6795 	port->stats = netdev_alloc_pcpu_stats(struct mvpp2_pcpu_stats);
6796 	if (!port->stats) {
6797 		err = -ENOMEM;
6798 		goto err_free_irq;
6799 	}
6800 
6801 	port->ethtool_stats = devm_kcalloc(&pdev->dev,
6802 					   MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs),
6803 					   sizeof(u64), GFP_KERNEL);
6804 	if (!port->ethtool_stats) {
6805 		err = -ENOMEM;
6806 		goto err_free_stats;
6807 	}
6808 
6809 	mutex_init(&port->gather_stats_lock);
6810 	INIT_DELAYED_WORK(&port->stats_work, mvpp2_gather_hw_statistics);
6811 
6812 	mvpp2_port_copy_mac_addr(dev, priv, port_fwnode, &mac_from);
6813 
6814 	port->tx_ring_size = MVPP2_MAX_TXD_DFLT;
6815 	port->rx_ring_size = MVPP2_MAX_RXD_DFLT;
6816 	SET_NETDEV_DEV(dev, &pdev->dev);
6817 
6818 	err = mvpp2_port_init(port);
6819 	if (err < 0) {
6820 		dev_err(&pdev->dev, "failed to init port %d\n", id);
6821 		goto err_free_stats;
6822 	}
6823 
6824 	mvpp2_port_periodic_xon_disable(port);
6825 
6826 	mvpp2_mac_reset_assert(port);
6827 	mvpp22_pcs_reset_assert(port);
6828 
6829 	port->pcpu = alloc_percpu(struct mvpp2_port_pcpu);
6830 	if (!port->pcpu) {
6831 		err = -ENOMEM;
6832 		goto err_free_txq_pcpu;
6833 	}
6834 
6835 	if (!port->has_tx_irqs) {
6836 		for (thread = 0; thread < priv->nthreads; thread++) {
6837 			port_pcpu = per_cpu_ptr(port->pcpu, thread);
6838 
6839 			hrtimer_init(&port_pcpu->tx_done_timer, CLOCK_MONOTONIC,
6840 				     HRTIMER_MODE_REL_PINNED_SOFT);
6841 			port_pcpu->tx_done_timer.function = mvpp2_hr_timer_cb;
6842 			port_pcpu->timer_scheduled = false;
6843 			port_pcpu->dev = dev;
6844 		}
6845 	}
6846 
6847 	features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
6848 		   NETIF_F_TSO;
6849 	dev->features = features | NETIF_F_RXCSUM;
6850 	dev->hw_features |= features | NETIF_F_RXCSUM | NETIF_F_GRO |
6851 			    NETIF_F_HW_VLAN_CTAG_FILTER;
6852 
6853 	if (mvpp22_rss_is_supported(port)) {
6854 		dev->hw_features |= NETIF_F_RXHASH;
6855 		dev->features |= NETIF_F_NTUPLE;
6856 	}
6857 
6858 	if (!port->priv->percpu_pools)
6859 		mvpp2_set_hw_csum(port, port->pool_long->id);
6860 
6861 	dev->vlan_features |= features;
6862 	netif_set_tso_max_segs(dev, MVPP2_MAX_TSO_SEGS);
6863 	dev->priv_flags |= IFF_UNICAST_FLT;
6864 
6865 	/* MTU range: 68 - 9704 */
6866 	dev->min_mtu = ETH_MIN_MTU;
6867 	/* 9704 == 9728 - 20 and rounding to 8 */
6868 	dev->max_mtu = MVPP2_BM_JUMBO_PKT_SIZE;
6869 	dev->dev.of_node = port_node;
6870 
6871 	port->pcs_gmac.ops = &mvpp2_phylink_gmac_pcs_ops;
6872 	port->pcs_xlg.ops = &mvpp2_phylink_xlg_pcs_ops;
6873 
6874 	if (!mvpp2_use_acpi_compat_mode(port_fwnode)) {
6875 		port->phylink_config.dev = &dev->dev;
6876 		port->phylink_config.type = PHYLINK_NETDEV;
6877 		port->phylink_config.mac_capabilities =
6878 			MAC_2500FD | MAC_1000FD | MAC_100 | MAC_10;
6879 
6880 		if (port->priv->global_tx_fc)
6881 			port->phylink_config.mac_capabilities |=
6882 				MAC_SYM_PAUSE | MAC_ASYM_PAUSE;
6883 
6884 		if (mvpp2_port_supports_xlg(port)) {
6885 			/* If a COMPHY is present, we can support any of
6886 			 * the serdes modes and switch between them.
6887 			 */
6888 			if (comphy) {
6889 				__set_bit(PHY_INTERFACE_MODE_5GBASER,
6890 					  port->phylink_config.supported_interfaces);
6891 				__set_bit(PHY_INTERFACE_MODE_10GBASER,
6892 					  port->phylink_config.supported_interfaces);
6893 				__set_bit(PHY_INTERFACE_MODE_XAUI,
6894 					  port->phylink_config.supported_interfaces);
6895 			} else if (phy_mode == PHY_INTERFACE_MODE_5GBASER) {
6896 				__set_bit(PHY_INTERFACE_MODE_5GBASER,
6897 					  port->phylink_config.supported_interfaces);
6898 			} else if (phy_mode == PHY_INTERFACE_MODE_10GBASER) {
6899 				__set_bit(PHY_INTERFACE_MODE_10GBASER,
6900 					  port->phylink_config.supported_interfaces);
6901 			} else if (phy_mode == PHY_INTERFACE_MODE_XAUI) {
6902 				__set_bit(PHY_INTERFACE_MODE_XAUI,
6903 					  port->phylink_config.supported_interfaces);
6904 			}
6905 
6906 			if (comphy)
6907 				port->phylink_config.mac_capabilities |=
6908 					MAC_10000FD | MAC_5000FD;
6909 			else if (phy_mode == PHY_INTERFACE_MODE_5GBASER)
6910 				port->phylink_config.mac_capabilities |=
6911 					MAC_5000FD;
6912 			else
6913 				port->phylink_config.mac_capabilities |=
6914 					MAC_10000FD;
6915 		}
6916 
6917 		if (mvpp2_port_supports_rgmii(port))
6918 			phy_interface_set_rgmii(port->phylink_config.supported_interfaces);
6919 
6920 		if (comphy) {
6921 			/* If a COMPHY is present, we can support any of the
6922 			 * serdes modes and switch between them.
6923 			 */
6924 			__set_bit(PHY_INTERFACE_MODE_SGMII,
6925 				  port->phylink_config.supported_interfaces);
6926 			__set_bit(PHY_INTERFACE_MODE_1000BASEX,
6927 				  port->phylink_config.supported_interfaces);
6928 			__set_bit(PHY_INTERFACE_MODE_2500BASEX,
6929 				  port->phylink_config.supported_interfaces);
6930 		} else if (phy_mode == PHY_INTERFACE_MODE_2500BASEX) {
6931 			/* No COMPHY, with only 2500BASE-X mode supported */
6932 			__set_bit(PHY_INTERFACE_MODE_2500BASEX,
6933 				  port->phylink_config.supported_interfaces);
6934 		} else if (phy_mode == PHY_INTERFACE_MODE_1000BASEX ||
6935 			   phy_mode == PHY_INTERFACE_MODE_SGMII) {
6936 			/* No COMPHY, we can switch between 1000BASE-X and SGMII
6937 			 */
6938 			__set_bit(PHY_INTERFACE_MODE_1000BASEX,
6939 				  port->phylink_config.supported_interfaces);
6940 			__set_bit(PHY_INTERFACE_MODE_SGMII,
6941 				  port->phylink_config.supported_interfaces);
6942 		}
6943 
6944 		phylink = phylink_create(&port->phylink_config, port_fwnode,
6945 					 phy_mode, &mvpp2_phylink_ops);
6946 		if (IS_ERR(phylink)) {
6947 			err = PTR_ERR(phylink);
6948 			goto err_free_port_pcpu;
6949 		}
6950 		port->phylink = phylink;
6951 	} else {
6952 		dev_warn(&pdev->dev, "Use link irqs for port#%d. FW update required\n", port->id);
6953 		port->phylink = NULL;
6954 	}
6955 
6956 	/* Cycle the comphy to power it down, saving 270mW per port -
6957 	 * don't worry about an error powering it up. When the comphy
6958 	 * driver does this, we can remove this code.
6959 	 */
6960 	if (port->comphy) {
6961 		err = mvpp22_comphy_init(port, port->phy_interface);
6962 		if (err == 0)
6963 			phy_power_off(port->comphy);
6964 	}
6965 
6966 	err = register_netdev(dev);
6967 	if (err < 0) {
6968 		dev_err(&pdev->dev, "failed to register netdev\n");
6969 		goto err_phylink;
6970 	}
6971 	netdev_info(dev, "Using %s mac address %pM\n", mac_from, dev->dev_addr);
6972 
6973 	priv->port_list[priv->port_count++] = port;
6974 
6975 	return 0;
6976 
6977 err_phylink:
6978 	if (port->phylink)
6979 		phylink_destroy(port->phylink);
6980 err_free_port_pcpu:
6981 	free_percpu(port->pcpu);
6982 err_free_txq_pcpu:
6983 	for (i = 0; i < port->ntxqs; i++)
6984 		free_percpu(port->txqs[i]->pcpu);
6985 err_free_stats:
6986 	free_percpu(port->stats);
6987 err_free_irq:
6988 	if (port->port_irq)
6989 		irq_dispose_mapping(port->port_irq);
6990 err_deinit_qvecs:
6991 	mvpp2_queue_vectors_deinit(port);
6992 err_free_netdev:
6993 	free_netdev(dev);
6994 	return err;
6995 }
6996 
6997 /* Ports removal routine */
6998 static void mvpp2_port_remove(struct mvpp2_port *port)
6999 {
7000 	int i;
7001 
7002 	unregister_netdev(port->dev);
7003 	if (port->phylink)
7004 		phylink_destroy(port->phylink);
7005 	free_percpu(port->pcpu);
7006 	free_percpu(port->stats);
7007 	for (i = 0; i < port->ntxqs; i++)
7008 		free_percpu(port->txqs[i]->pcpu);
7009 	mvpp2_queue_vectors_deinit(port);
7010 	if (port->port_irq)
7011 		irq_dispose_mapping(port->port_irq);
7012 	free_netdev(port->dev);
7013 }
7014 
7015 /* Initialize decoding windows */
7016 static void mvpp2_conf_mbus_windows(const struct mbus_dram_target_info *dram,
7017 				    struct mvpp2 *priv)
7018 {
7019 	u32 win_enable;
7020 	int i;
7021 
7022 	for (i = 0; i < 6; i++) {
7023 		mvpp2_write(priv, MVPP2_WIN_BASE(i), 0);
7024 		mvpp2_write(priv, MVPP2_WIN_SIZE(i), 0);
7025 
7026 		if (i < 4)
7027 			mvpp2_write(priv, MVPP2_WIN_REMAP(i), 0);
7028 	}
7029 
7030 	win_enable = 0;
7031 
7032 	for (i = 0; i < dram->num_cs; i++) {
7033 		const struct mbus_dram_window *cs = dram->cs + i;
7034 
7035 		mvpp2_write(priv, MVPP2_WIN_BASE(i),
7036 			    (cs->base & 0xffff0000) | (cs->mbus_attr << 8) |
7037 			    dram->mbus_dram_target_id);
7038 
7039 		mvpp2_write(priv, MVPP2_WIN_SIZE(i),
7040 			    (cs->size - 1) & 0xffff0000);
7041 
7042 		win_enable |= (1 << i);
7043 	}
7044 
7045 	mvpp2_write(priv, MVPP2_BASE_ADDR_ENABLE, win_enable);
7046 }
7047 
7048 /* Initialize Rx FIFO's */
7049 static void mvpp2_rx_fifo_init(struct mvpp2 *priv)
7050 {
7051 	int port;
7052 
7053 	for (port = 0; port < MVPP2_MAX_PORTS; port++) {
7054 		mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port),
7055 			    MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB);
7056 		mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port),
7057 			    MVPP2_RX_FIFO_PORT_ATTR_SIZE_4KB);
7058 	}
7059 
7060 	mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG,
7061 		    MVPP2_RX_FIFO_PORT_MIN_PKT);
7062 	mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1);
7063 }
7064 
7065 static void mvpp22_rx_fifo_set_hw(struct mvpp2 *priv, int port, int data_size)
7066 {
7067 	int attr_size = MVPP2_RX_FIFO_PORT_ATTR_SIZE(data_size);
7068 
7069 	mvpp2_write(priv, MVPP2_RX_DATA_FIFO_SIZE_REG(port), data_size);
7070 	mvpp2_write(priv, MVPP2_RX_ATTR_FIFO_SIZE_REG(port), attr_size);
7071 }
7072 
7073 /* Initialize TX FIFO's: the total FIFO size is 48kB on PPv2.2 and PPv2.3.
7074  * 4kB fixed space must be assigned for the loopback port.
7075  * Redistribute remaining avialable 44kB space among all active ports.
7076  * Guarantee minimum 32kB for 10G port and 8kB for port 1, capable of 2.5G
7077  * SGMII link.
7078  */
7079 static void mvpp22_rx_fifo_init(struct mvpp2 *priv)
7080 {
7081 	int remaining_ports_count;
7082 	unsigned long port_map;
7083 	int size_remainder;
7084 	int port, size;
7085 
7086 	/* The loopback requires fixed 4kB of the FIFO space assignment. */
7087 	mvpp22_rx_fifo_set_hw(priv, MVPP2_LOOPBACK_PORT_INDEX,
7088 			      MVPP2_RX_FIFO_PORT_DATA_SIZE_4KB);
7089 	port_map = priv->port_map & ~BIT(MVPP2_LOOPBACK_PORT_INDEX);
7090 
7091 	/* Set RX FIFO size to 0 for inactive ports. */
7092 	for_each_clear_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX)
7093 		mvpp22_rx_fifo_set_hw(priv, port, 0);
7094 
7095 	/* Assign remaining RX FIFO space among all active ports. */
7096 	size_remainder = MVPP2_RX_FIFO_PORT_DATA_SIZE_44KB;
7097 	remaining_ports_count = hweight_long(port_map);
7098 
7099 	for_each_set_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) {
7100 		if (remaining_ports_count == 1)
7101 			size = size_remainder;
7102 		else if (port == 0)
7103 			size = max(size_remainder / remaining_ports_count,
7104 				   MVPP2_RX_FIFO_PORT_DATA_SIZE_32KB);
7105 		else if (port == 1)
7106 			size = max(size_remainder / remaining_ports_count,
7107 				   MVPP2_RX_FIFO_PORT_DATA_SIZE_8KB);
7108 		else
7109 			size = size_remainder / remaining_ports_count;
7110 
7111 		size_remainder -= size;
7112 		remaining_ports_count--;
7113 
7114 		mvpp22_rx_fifo_set_hw(priv, port, size);
7115 	}
7116 
7117 	mvpp2_write(priv, MVPP2_RX_MIN_PKT_SIZE_REG,
7118 		    MVPP2_RX_FIFO_PORT_MIN_PKT);
7119 	mvpp2_write(priv, MVPP2_RX_FIFO_INIT_REG, 0x1);
7120 }
7121 
7122 /* Configure Rx FIFO Flow control thresholds */
7123 static void mvpp23_rx_fifo_fc_set_tresh(struct mvpp2 *priv)
7124 {
7125 	int port, val;
7126 
7127 	/* Port 0: maximum speed -10Gb/s port
7128 	 *	   required by spec RX FIFO threshold 9KB
7129 	 * Port 1: maximum speed -5Gb/s port
7130 	 *	   required by spec RX FIFO threshold 4KB
7131 	 * Port 2: maximum speed -1Gb/s port
7132 	 *	   required by spec RX FIFO threshold 2KB
7133 	 */
7134 
7135 	/* Without loopback port */
7136 	for (port = 0; port < (MVPP2_MAX_PORTS - 1); port++) {
7137 		if (port == 0) {
7138 			val = (MVPP23_PORT0_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT)
7139 				<< MVPP2_RX_FC_TRSH_OFFS;
7140 			val &= MVPP2_RX_FC_TRSH_MASK;
7141 			mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
7142 		} else if (port == 1) {
7143 			val = (MVPP23_PORT1_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT)
7144 				<< MVPP2_RX_FC_TRSH_OFFS;
7145 			val &= MVPP2_RX_FC_TRSH_MASK;
7146 			mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
7147 		} else {
7148 			val = (MVPP23_PORT2_FIFO_TRSH / MVPP2_RX_FC_TRSH_UNIT)
7149 				<< MVPP2_RX_FC_TRSH_OFFS;
7150 			val &= MVPP2_RX_FC_TRSH_MASK;
7151 			mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
7152 		}
7153 	}
7154 }
7155 
7156 /* Configure Rx FIFO Flow control thresholds */
7157 void mvpp23_rx_fifo_fc_en(struct mvpp2 *priv, int port, bool en)
7158 {
7159 	int val;
7160 
7161 	val = mvpp2_read(priv, MVPP2_RX_FC_REG(port));
7162 
7163 	if (en)
7164 		val |= MVPP2_RX_FC_EN;
7165 	else
7166 		val &= ~MVPP2_RX_FC_EN;
7167 
7168 	mvpp2_write(priv, MVPP2_RX_FC_REG(port), val);
7169 }
7170 
7171 static void mvpp22_tx_fifo_set_hw(struct mvpp2 *priv, int port, int size)
7172 {
7173 	int threshold = MVPP2_TX_FIFO_THRESHOLD(size);
7174 
7175 	mvpp2_write(priv, MVPP22_TX_FIFO_SIZE_REG(port), size);
7176 	mvpp2_write(priv, MVPP22_TX_FIFO_THRESH_REG(port), threshold);
7177 }
7178 
7179 /* Initialize TX FIFO's: the total FIFO size is 19kB on PPv2.2 and PPv2.3.
7180  * 1kB fixed space must be assigned for the loopback port.
7181  * Redistribute remaining avialable 18kB space among all active ports.
7182  * The 10G interface should use 10kB (which is maximum possible size
7183  * per single port).
7184  */
7185 static void mvpp22_tx_fifo_init(struct mvpp2 *priv)
7186 {
7187 	int remaining_ports_count;
7188 	unsigned long port_map;
7189 	int size_remainder;
7190 	int port, size;
7191 
7192 	/* The loopback requires fixed 1kB of the FIFO space assignment. */
7193 	mvpp22_tx_fifo_set_hw(priv, MVPP2_LOOPBACK_PORT_INDEX,
7194 			      MVPP22_TX_FIFO_DATA_SIZE_1KB);
7195 	port_map = priv->port_map & ~BIT(MVPP2_LOOPBACK_PORT_INDEX);
7196 
7197 	/* Set TX FIFO size to 0 for inactive ports. */
7198 	for_each_clear_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX)
7199 		mvpp22_tx_fifo_set_hw(priv, port, 0);
7200 
7201 	/* Assign remaining TX FIFO space among all active ports. */
7202 	size_remainder = MVPP22_TX_FIFO_DATA_SIZE_18KB;
7203 	remaining_ports_count = hweight_long(port_map);
7204 
7205 	for_each_set_bit(port, &port_map, MVPP2_LOOPBACK_PORT_INDEX) {
7206 		if (remaining_ports_count == 1)
7207 			size = min(size_remainder,
7208 				   MVPP22_TX_FIFO_DATA_SIZE_10KB);
7209 		else if (port == 0)
7210 			size = MVPP22_TX_FIFO_DATA_SIZE_10KB;
7211 		else
7212 			size = size_remainder / remaining_ports_count;
7213 
7214 		size_remainder -= size;
7215 		remaining_ports_count--;
7216 
7217 		mvpp22_tx_fifo_set_hw(priv, port, size);
7218 	}
7219 }
7220 
7221 static void mvpp2_axi_init(struct mvpp2 *priv)
7222 {
7223 	u32 val, rdval, wrval;
7224 
7225 	mvpp2_write(priv, MVPP22_BM_ADDR_HIGH_RLS_REG, 0x0);
7226 
7227 	/* AXI Bridge Configuration */
7228 
7229 	rdval = MVPP22_AXI_CODE_CACHE_RD_CACHE
7230 		<< MVPP22_AXI_ATTR_CACHE_OFFS;
7231 	rdval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
7232 		<< MVPP22_AXI_ATTR_DOMAIN_OFFS;
7233 
7234 	wrval = MVPP22_AXI_CODE_CACHE_WR_CACHE
7235 		<< MVPP22_AXI_ATTR_CACHE_OFFS;
7236 	wrval |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
7237 		<< MVPP22_AXI_ATTR_DOMAIN_OFFS;
7238 
7239 	/* BM */
7240 	mvpp2_write(priv, MVPP22_AXI_BM_WR_ATTR_REG, wrval);
7241 	mvpp2_write(priv, MVPP22_AXI_BM_RD_ATTR_REG, rdval);
7242 
7243 	/* Descriptors */
7244 	mvpp2_write(priv, MVPP22_AXI_AGGRQ_DESCR_RD_ATTR_REG, rdval);
7245 	mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_WR_ATTR_REG, wrval);
7246 	mvpp2_write(priv, MVPP22_AXI_TXQ_DESCR_RD_ATTR_REG, rdval);
7247 	mvpp2_write(priv, MVPP22_AXI_RXQ_DESCR_WR_ATTR_REG, wrval);
7248 
7249 	/* Buffer Data */
7250 	mvpp2_write(priv, MVPP22_AXI_TX_DATA_RD_ATTR_REG, rdval);
7251 	mvpp2_write(priv, MVPP22_AXI_RX_DATA_WR_ATTR_REG, wrval);
7252 
7253 	val = MVPP22_AXI_CODE_CACHE_NON_CACHE
7254 		<< MVPP22_AXI_CODE_CACHE_OFFS;
7255 	val |= MVPP22_AXI_CODE_DOMAIN_SYSTEM
7256 		<< MVPP22_AXI_CODE_DOMAIN_OFFS;
7257 	mvpp2_write(priv, MVPP22_AXI_RD_NORMAL_CODE_REG, val);
7258 	mvpp2_write(priv, MVPP22_AXI_WR_NORMAL_CODE_REG, val);
7259 
7260 	val = MVPP22_AXI_CODE_CACHE_RD_CACHE
7261 		<< MVPP22_AXI_CODE_CACHE_OFFS;
7262 	val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
7263 		<< MVPP22_AXI_CODE_DOMAIN_OFFS;
7264 
7265 	mvpp2_write(priv, MVPP22_AXI_RD_SNOOP_CODE_REG, val);
7266 
7267 	val = MVPP22_AXI_CODE_CACHE_WR_CACHE
7268 		<< MVPP22_AXI_CODE_CACHE_OFFS;
7269 	val |= MVPP22_AXI_CODE_DOMAIN_OUTER_DOM
7270 		<< MVPP22_AXI_CODE_DOMAIN_OFFS;
7271 
7272 	mvpp2_write(priv, MVPP22_AXI_WR_SNOOP_CODE_REG, val);
7273 }
7274 
7275 /* Initialize network controller common part HW */
7276 static int mvpp2_init(struct platform_device *pdev, struct mvpp2 *priv)
7277 {
7278 	const struct mbus_dram_target_info *dram_target_info;
7279 	int err, i;
7280 	u32 val;
7281 
7282 	/* MBUS windows configuration */
7283 	dram_target_info = mv_mbus_dram_info();
7284 	if (dram_target_info)
7285 		mvpp2_conf_mbus_windows(dram_target_info, priv);
7286 
7287 	if (priv->hw_version >= MVPP22)
7288 		mvpp2_axi_init(priv);
7289 
7290 	/* Disable HW PHY polling */
7291 	if (priv->hw_version == MVPP21) {
7292 		val = readl(priv->lms_base + MVPP2_PHY_AN_CFG0_REG);
7293 		val |= MVPP2_PHY_AN_STOP_SMI0_MASK;
7294 		writel(val, priv->lms_base + MVPP2_PHY_AN_CFG0_REG);
7295 	} else {
7296 		val = readl(priv->iface_base + MVPP22_SMI_MISC_CFG_REG);
7297 		val &= ~MVPP22_SMI_POLLING_EN;
7298 		writel(val, priv->iface_base + MVPP22_SMI_MISC_CFG_REG);
7299 	}
7300 
7301 	/* Allocate and initialize aggregated TXQs */
7302 	priv->aggr_txqs = devm_kcalloc(&pdev->dev, MVPP2_MAX_THREADS,
7303 				       sizeof(*priv->aggr_txqs),
7304 				       GFP_KERNEL);
7305 	if (!priv->aggr_txqs)
7306 		return -ENOMEM;
7307 
7308 	for (i = 0; i < MVPP2_MAX_THREADS; i++) {
7309 		priv->aggr_txqs[i].id = i;
7310 		priv->aggr_txqs[i].size = MVPP2_AGGR_TXQ_SIZE;
7311 		err = mvpp2_aggr_txq_init(pdev, &priv->aggr_txqs[i], i, priv);
7312 		if (err < 0)
7313 			return err;
7314 	}
7315 
7316 	/* Fifo Init */
7317 	if (priv->hw_version == MVPP21) {
7318 		mvpp2_rx_fifo_init(priv);
7319 	} else {
7320 		mvpp22_rx_fifo_init(priv);
7321 		mvpp22_tx_fifo_init(priv);
7322 		if (priv->hw_version == MVPP23)
7323 			mvpp23_rx_fifo_fc_set_tresh(priv);
7324 	}
7325 
7326 	if (priv->hw_version == MVPP21)
7327 		writel(MVPP2_EXT_GLOBAL_CTRL_DEFAULT,
7328 		       priv->lms_base + MVPP2_MNG_EXTENDED_GLOBAL_CTRL_REG);
7329 
7330 	/* Allow cache snoop when transmiting packets */
7331 	mvpp2_write(priv, MVPP2_TX_SNOOP_REG, 0x1);
7332 
7333 	/* Buffer Manager initialization */
7334 	err = mvpp2_bm_init(&pdev->dev, priv);
7335 	if (err < 0)
7336 		return err;
7337 
7338 	/* Parser default initialization */
7339 	err = mvpp2_prs_default_init(pdev, priv);
7340 	if (err < 0)
7341 		return err;
7342 
7343 	/* Classifier default initialization */
7344 	mvpp2_cls_init(priv);
7345 
7346 	return 0;
7347 }
7348 
7349 static int mvpp2_get_sram(struct platform_device *pdev,
7350 			  struct mvpp2 *priv)
7351 {
7352 	struct resource *res;
7353 
7354 	res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
7355 	if (!res) {
7356 		if (has_acpi_companion(&pdev->dev))
7357 			dev_warn(&pdev->dev, "ACPI is too old, Flow control not supported\n");
7358 		else
7359 			dev_warn(&pdev->dev, "DT is too old, Flow control not supported\n");
7360 		return 0;
7361 	}
7362 
7363 	priv->cm3_base = devm_ioremap_resource(&pdev->dev, res);
7364 
7365 	return PTR_ERR_OR_ZERO(priv->cm3_base);
7366 }
7367 
7368 static int mvpp2_probe(struct platform_device *pdev)
7369 {
7370 	struct fwnode_handle *fwnode = pdev->dev.fwnode;
7371 	struct fwnode_handle *port_fwnode;
7372 	struct mvpp2 *priv;
7373 	struct resource *res;
7374 	void __iomem *base;
7375 	int i, shared;
7376 	int err;
7377 
7378 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
7379 	if (!priv)
7380 		return -ENOMEM;
7381 
7382 	priv->hw_version = (unsigned long)device_get_match_data(&pdev->dev);
7383 
7384 	/* multi queue mode isn't supported on PPV2.1, fallback to single
7385 	 * mode
7386 	 */
7387 	if (priv->hw_version == MVPP21)
7388 		queue_mode = MVPP2_QDIST_SINGLE_MODE;
7389 
7390 	base = devm_platform_ioremap_resource(pdev, 0);
7391 	if (IS_ERR(base))
7392 		return PTR_ERR(base);
7393 
7394 	if (priv->hw_version == MVPP21) {
7395 		priv->lms_base = devm_platform_ioremap_resource(pdev, 1);
7396 		if (IS_ERR(priv->lms_base))
7397 			return PTR_ERR(priv->lms_base);
7398 	} else {
7399 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
7400 		if (!res) {
7401 			dev_err(&pdev->dev, "Invalid resource\n");
7402 			return -EINVAL;
7403 		}
7404 		if (has_acpi_companion(&pdev->dev)) {
7405 			/* In case the MDIO memory region is declared in
7406 			 * the ACPI, it can already appear as 'in-use'
7407 			 * in the OS. Because it is overlapped by second
7408 			 * region of the network controller, make
7409 			 * sure it is released, before requesting it again.
7410 			 * The care is taken by mvpp2 driver to avoid
7411 			 * concurrent access to this memory region.
7412 			 */
7413 			release_resource(res);
7414 		}
7415 		priv->iface_base = devm_ioremap_resource(&pdev->dev, res);
7416 		if (IS_ERR(priv->iface_base))
7417 			return PTR_ERR(priv->iface_base);
7418 
7419 		/* Map CM3 SRAM */
7420 		err = mvpp2_get_sram(pdev, priv);
7421 		if (err)
7422 			dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n");
7423 
7424 		/* Enable global Flow Control only if handler to SRAM not NULL */
7425 		if (priv->cm3_base)
7426 			priv->global_tx_fc = true;
7427 	}
7428 
7429 	if (priv->hw_version >= MVPP22 && dev_of_node(&pdev->dev)) {
7430 		priv->sysctrl_base =
7431 			syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
7432 							"marvell,system-controller");
7433 		if (IS_ERR(priv->sysctrl_base))
7434 			/* The system controller regmap is optional for dt
7435 			 * compatibility reasons. When not provided, the
7436 			 * configuration of the GoP relies on the
7437 			 * firmware/bootloader.
7438 			 */
7439 			priv->sysctrl_base = NULL;
7440 	}
7441 
7442 	if (priv->hw_version >= MVPP22 &&
7443 	    mvpp2_get_nrxqs(priv) * 2 <= MVPP2_BM_MAX_POOLS)
7444 		priv->percpu_pools = 1;
7445 
7446 	mvpp2_setup_bm_pool();
7447 
7448 
7449 	priv->nthreads = min_t(unsigned int, num_present_cpus(),
7450 			       MVPP2_MAX_THREADS);
7451 
7452 	shared = num_present_cpus() - priv->nthreads;
7453 	if (shared > 0)
7454 		bitmap_set(&priv->lock_map, 0,
7455 			    min_t(int, shared, MVPP2_MAX_THREADS));
7456 
7457 	for (i = 0; i < MVPP2_MAX_THREADS; i++) {
7458 		u32 addr_space_sz;
7459 
7460 		addr_space_sz = (priv->hw_version == MVPP21 ?
7461 				 MVPP21_ADDR_SPACE_SZ : MVPP22_ADDR_SPACE_SZ);
7462 		priv->swth_base[i] = base + i * addr_space_sz;
7463 	}
7464 
7465 	if (priv->hw_version == MVPP21)
7466 		priv->max_port_rxqs = 8;
7467 	else
7468 		priv->max_port_rxqs = 32;
7469 
7470 	if (dev_of_node(&pdev->dev)) {
7471 		priv->pp_clk = devm_clk_get(&pdev->dev, "pp_clk");
7472 		if (IS_ERR(priv->pp_clk))
7473 			return PTR_ERR(priv->pp_clk);
7474 		err = clk_prepare_enable(priv->pp_clk);
7475 		if (err < 0)
7476 			return err;
7477 
7478 		priv->gop_clk = devm_clk_get(&pdev->dev, "gop_clk");
7479 		if (IS_ERR(priv->gop_clk)) {
7480 			err = PTR_ERR(priv->gop_clk);
7481 			goto err_pp_clk;
7482 		}
7483 		err = clk_prepare_enable(priv->gop_clk);
7484 		if (err < 0)
7485 			goto err_pp_clk;
7486 
7487 		if (priv->hw_version >= MVPP22) {
7488 			priv->mg_clk = devm_clk_get(&pdev->dev, "mg_clk");
7489 			if (IS_ERR(priv->mg_clk)) {
7490 				err = PTR_ERR(priv->mg_clk);
7491 				goto err_gop_clk;
7492 			}
7493 
7494 			err = clk_prepare_enable(priv->mg_clk);
7495 			if (err < 0)
7496 				goto err_gop_clk;
7497 
7498 			priv->mg_core_clk = devm_clk_get_optional(&pdev->dev, "mg_core_clk");
7499 			if (IS_ERR(priv->mg_core_clk)) {
7500 				err = PTR_ERR(priv->mg_core_clk);
7501 				goto err_mg_clk;
7502 			}
7503 
7504 			err = clk_prepare_enable(priv->mg_core_clk);
7505 			if (err < 0)
7506 				goto err_mg_clk;
7507 		}
7508 
7509 		priv->axi_clk = devm_clk_get_optional(&pdev->dev, "axi_clk");
7510 		if (IS_ERR(priv->axi_clk)) {
7511 			err = PTR_ERR(priv->axi_clk);
7512 			goto err_mg_core_clk;
7513 		}
7514 
7515 		err = clk_prepare_enable(priv->axi_clk);
7516 		if (err < 0)
7517 			goto err_mg_core_clk;
7518 
7519 		/* Get system's tclk rate */
7520 		priv->tclk = clk_get_rate(priv->pp_clk);
7521 	} else {
7522 		err = device_property_read_u32(&pdev->dev, "clock-frequency", &priv->tclk);
7523 		if (err) {
7524 			dev_err(&pdev->dev, "missing clock-frequency value\n");
7525 			return err;
7526 		}
7527 	}
7528 
7529 	if (priv->hw_version >= MVPP22) {
7530 		err = dma_set_mask(&pdev->dev, MVPP2_DESC_DMA_MASK);
7531 		if (err)
7532 			goto err_axi_clk;
7533 		/* Sadly, the BM pools all share the same register to
7534 		 * store the high 32 bits of their address. So they
7535 		 * must all have the same high 32 bits, which forces
7536 		 * us to restrict coherent memory to DMA_BIT_MASK(32).
7537 		 */
7538 		err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7539 		if (err)
7540 			goto err_axi_clk;
7541 	}
7542 
7543 	/* Map DTS-active ports. Should be done before FIFO mvpp2_init */
7544 	fwnode_for_each_available_child_node(fwnode, port_fwnode) {
7545 		if (!fwnode_property_read_u32(port_fwnode, "port-id", &i))
7546 			priv->port_map |= BIT(i);
7547 	}
7548 
7549 	if (mvpp2_read(priv, MVPP2_VER_ID_REG) == MVPP2_VER_PP23)
7550 		priv->hw_version = MVPP23;
7551 
7552 	/* Init mss lock */
7553 	spin_lock_init(&priv->mss_spinlock);
7554 
7555 	/* Initialize network controller */
7556 	err = mvpp2_init(pdev, priv);
7557 	if (err < 0) {
7558 		dev_err(&pdev->dev, "failed to initialize controller\n");
7559 		goto err_axi_clk;
7560 	}
7561 
7562 	err = mvpp22_tai_probe(&pdev->dev, priv);
7563 	if (err < 0)
7564 		goto err_axi_clk;
7565 
7566 	/* Initialize ports */
7567 	fwnode_for_each_available_child_node(fwnode, port_fwnode) {
7568 		err = mvpp2_port_probe(pdev, port_fwnode, priv);
7569 		if (err < 0)
7570 			goto err_port_probe;
7571 	}
7572 
7573 	if (priv->port_count == 0) {
7574 		dev_err(&pdev->dev, "no ports enabled\n");
7575 		err = -ENODEV;
7576 		goto err_axi_clk;
7577 	}
7578 
7579 	/* Statistics must be gathered regularly because some of them (like
7580 	 * packets counters) are 32-bit registers and could overflow quite
7581 	 * quickly. For instance, a 10Gb link used at full bandwidth with the
7582 	 * smallest packets (64B) will overflow a 32-bit counter in less than
7583 	 * 30 seconds. Then, use a workqueue to fill 64-bit counters.
7584 	 */
7585 	snprintf(priv->queue_name, sizeof(priv->queue_name),
7586 		 "stats-wq-%s%s", netdev_name(priv->port_list[0]->dev),
7587 		 priv->port_count > 1 ? "+" : "");
7588 	priv->stats_queue = create_singlethread_workqueue(priv->queue_name);
7589 	if (!priv->stats_queue) {
7590 		err = -ENOMEM;
7591 		goto err_port_probe;
7592 	}
7593 
7594 	if (priv->global_tx_fc && priv->hw_version >= MVPP22) {
7595 		err = mvpp2_enable_global_fc(priv);
7596 		if (err)
7597 			dev_warn(&pdev->dev, "Minimum of CM3 firmware 18.09 and chip revision B0 required for flow control\n");
7598 	}
7599 
7600 	mvpp2_dbgfs_init(priv, pdev->name);
7601 
7602 	platform_set_drvdata(pdev, priv);
7603 	return 0;
7604 
7605 err_port_probe:
7606 	fwnode_handle_put(port_fwnode);
7607 
7608 	i = 0;
7609 	fwnode_for_each_available_child_node(fwnode, port_fwnode) {
7610 		if (priv->port_list[i])
7611 			mvpp2_port_remove(priv->port_list[i]);
7612 		i++;
7613 	}
7614 err_axi_clk:
7615 	clk_disable_unprepare(priv->axi_clk);
7616 err_mg_core_clk:
7617 	clk_disable_unprepare(priv->mg_core_clk);
7618 err_mg_clk:
7619 	clk_disable_unprepare(priv->mg_clk);
7620 err_gop_clk:
7621 	clk_disable_unprepare(priv->gop_clk);
7622 err_pp_clk:
7623 	clk_disable_unprepare(priv->pp_clk);
7624 	return err;
7625 }
7626 
7627 static int mvpp2_remove(struct platform_device *pdev)
7628 {
7629 	struct mvpp2 *priv = platform_get_drvdata(pdev);
7630 	struct fwnode_handle *fwnode = pdev->dev.fwnode;
7631 	int i = 0, poolnum = MVPP2_BM_POOLS_NUM;
7632 	struct fwnode_handle *port_fwnode;
7633 
7634 	mvpp2_dbgfs_cleanup(priv);
7635 
7636 	fwnode_for_each_available_child_node(fwnode, port_fwnode) {
7637 		if (priv->port_list[i]) {
7638 			mutex_destroy(&priv->port_list[i]->gather_stats_lock);
7639 			mvpp2_port_remove(priv->port_list[i]);
7640 		}
7641 		i++;
7642 	}
7643 
7644 	destroy_workqueue(priv->stats_queue);
7645 
7646 	if (priv->percpu_pools)
7647 		poolnum = mvpp2_get_nrxqs(priv) * 2;
7648 
7649 	for (i = 0; i < poolnum; i++) {
7650 		struct mvpp2_bm_pool *bm_pool = &priv->bm_pools[i];
7651 
7652 		mvpp2_bm_pool_destroy(&pdev->dev, priv, bm_pool);
7653 	}
7654 
7655 	for (i = 0; i < MVPP2_MAX_THREADS; i++) {
7656 		struct mvpp2_tx_queue *aggr_txq = &priv->aggr_txqs[i];
7657 
7658 		dma_free_coherent(&pdev->dev,
7659 				  MVPP2_AGGR_TXQ_SIZE * MVPP2_DESC_ALIGNED_SIZE,
7660 				  aggr_txq->descs,
7661 				  aggr_txq->descs_dma);
7662 	}
7663 
7664 	if (is_acpi_node(port_fwnode))
7665 		return 0;
7666 
7667 	clk_disable_unprepare(priv->axi_clk);
7668 	clk_disable_unprepare(priv->mg_core_clk);
7669 	clk_disable_unprepare(priv->mg_clk);
7670 	clk_disable_unprepare(priv->pp_clk);
7671 	clk_disable_unprepare(priv->gop_clk);
7672 
7673 	return 0;
7674 }
7675 
7676 static const struct of_device_id mvpp2_match[] = {
7677 	{
7678 		.compatible = "marvell,armada-375-pp2",
7679 		.data = (void *)MVPP21,
7680 	},
7681 	{
7682 		.compatible = "marvell,armada-7k-pp22",
7683 		.data = (void *)MVPP22,
7684 	},
7685 	{ }
7686 };
7687 MODULE_DEVICE_TABLE(of, mvpp2_match);
7688 
7689 #ifdef CONFIG_ACPI
7690 static const struct acpi_device_id mvpp2_acpi_match[] = {
7691 	{ "MRVL0110", MVPP22 },
7692 	{ },
7693 };
7694 MODULE_DEVICE_TABLE(acpi, mvpp2_acpi_match);
7695 #endif
7696 
7697 static struct platform_driver mvpp2_driver = {
7698 	.probe = mvpp2_probe,
7699 	.remove = mvpp2_remove,
7700 	.driver = {
7701 		.name = MVPP2_DRIVER_NAME,
7702 		.of_match_table = mvpp2_match,
7703 		.acpi_match_table = ACPI_PTR(mvpp2_acpi_match),
7704 	},
7705 };
7706 
7707 static int __init mvpp2_driver_init(void)
7708 {
7709 	return platform_driver_register(&mvpp2_driver);
7710 }
7711 module_init(mvpp2_driver_init);
7712 
7713 static void __exit mvpp2_driver_exit(void)
7714 {
7715 	platform_driver_unregister(&mvpp2_driver);
7716 	mvpp2_dbgfs_exit();
7717 }
7718 module_exit(mvpp2_driver_exit);
7719 
7720 MODULE_DESCRIPTION("Marvell PPv2 Ethernet Driver - www.marvell.com");
7721 MODULE_AUTHOR("Marcin Wojtas <mw@semihalf.com>");
7722 MODULE_LICENSE("GPL v2");
7723