1 // SPDX-License-Identifier: GPL-2.0
2 /* Renesas Ethernet AVB device driver
3 *
4 * Copyright (C) 2014-2019 Renesas Electronics Corporation
5 * Copyright (C) 2015 Renesas Solutions Corp.
6 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>
7 *
8 * Based on the SuperH Ethernet driver
9 */
10
11 #include <linux/cache.h>
12 #include <linux/clk.h>
13 #include <linux/delay.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/err.h>
16 #include <linux/etherdevice.h>
17 #include <linux/ethtool.h>
18 #include <linux/if_vlan.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/module.h>
22 #include <linux/net_tstamp.h>
23 #include <linux/of.h>
24 #include <linux/of_mdio.h>
25 #include <linux/of_net.h>
26 #include <linux/platform_device.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/slab.h>
29 #include <linux/spinlock.h>
30 #include <linux/reset.h>
31 #include <linux/math64.h>
32
33 #include "ravb.h"
34
35 #define RAVB_DEF_MSG_ENABLE \
36 (NETIF_MSG_LINK | \
37 NETIF_MSG_TIMER | \
38 NETIF_MSG_RX_ERR | \
39 NETIF_MSG_TX_ERR)
40
41 static const char *ravb_rx_irqs[NUM_RX_QUEUE] = {
42 "ch0", /* RAVB_BE */
43 "ch1", /* RAVB_NC */
44 };
45
46 static const char *ravb_tx_irqs[NUM_TX_QUEUE] = {
47 "ch18", /* RAVB_BE */
48 "ch19", /* RAVB_NC */
49 };
50
ravb_modify(struct net_device * ndev,enum ravb_reg reg,u32 clear,u32 set)51 void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
52 u32 set)
53 {
54 ravb_write(ndev, (ravb_read(ndev, reg) & ~clear) | set, reg);
55 }
56
ravb_wait(struct net_device * ndev,enum ravb_reg reg,u32 mask,u32 value)57 int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value)
58 {
59 int i;
60
61 for (i = 0; i < 10000; i++) {
62 if ((ravb_read(ndev, reg) & mask) == value)
63 return 0;
64 udelay(10);
65 }
66 return -ETIMEDOUT;
67 }
68
ravb_set_opmode(struct net_device * ndev,u32 opmode)69 static int ravb_set_opmode(struct net_device *ndev, u32 opmode)
70 {
71 u32 csr_ops = 1U << (opmode & CCC_OPC);
72 u32 ccc_mask = CCC_OPC;
73 int error;
74
75 /* If gPTP active in config mode is supported it needs to be configured
76 * along with CSEL and operating mode in the same access. This is a
77 * hardware limitation.
78 */
79 if (opmode & CCC_GAC)
80 ccc_mask |= CCC_GAC | CCC_CSEL;
81
82 /* Set operating mode */
83 ravb_modify(ndev, CCC, ccc_mask, opmode);
84 /* Check if the operating mode is changed to the requested one */
85 error = ravb_wait(ndev, CSR, CSR_OPS, csr_ops);
86 if (error) {
87 netdev_err(ndev, "failed to switch device to requested mode (%u)\n",
88 opmode & CCC_OPC);
89 }
90
91 return error;
92 }
93
ravb_set_rate_gbeth(struct net_device * ndev)94 static void ravb_set_rate_gbeth(struct net_device *ndev)
95 {
96 struct ravb_private *priv = netdev_priv(ndev);
97
98 switch (priv->speed) {
99 case 10: /* 10BASE */
100 ravb_write(ndev, GBETH_GECMR_SPEED_10, GECMR);
101 break;
102 case 100: /* 100BASE */
103 ravb_write(ndev, GBETH_GECMR_SPEED_100, GECMR);
104 break;
105 case 1000: /* 1000BASE */
106 ravb_write(ndev, GBETH_GECMR_SPEED_1000, GECMR);
107 break;
108 }
109 }
110
ravb_set_rate_rcar(struct net_device * ndev)111 static void ravb_set_rate_rcar(struct net_device *ndev)
112 {
113 struct ravb_private *priv = netdev_priv(ndev);
114
115 switch (priv->speed) {
116 case 100: /* 100BASE */
117 ravb_write(ndev, GECMR_SPEED_100, GECMR);
118 break;
119 case 1000: /* 1000BASE */
120 ravb_write(ndev, GECMR_SPEED_1000, GECMR);
121 break;
122 }
123 }
124
ravb_set_buffer_align(struct sk_buff * skb)125 static void ravb_set_buffer_align(struct sk_buff *skb)
126 {
127 u32 reserve = (unsigned long)skb->data & (RAVB_ALIGN - 1);
128
129 if (reserve)
130 skb_reserve(skb, RAVB_ALIGN - reserve);
131 }
132
133 /* Get MAC address from the MAC address registers
134 *
135 * Ethernet AVB device doesn't have ROM for MAC address.
136 * This function gets the MAC address that was used by a bootloader.
137 */
ravb_read_mac_address(struct device_node * np,struct net_device * ndev)138 static void ravb_read_mac_address(struct device_node *np,
139 struct net_device *ndev)
140 {
141 int ret;
142
143 ret = of_get_ethdev_address(np, ndev);
144 if (ret) {
145 u32 mahr = ravb_read(ndev, MAHR);
146 u32 malr = ravb_read(ndev, MALR);
147 u8 addr[ETH_ALEN];
148
149 addr[0] = (mahr >> 24) & 0xFF;
150 addr[1] = (mahr >> 16) & 0xFF;
151 addr[2] = (mahr >> 8) & 0xFF;
152 addr[3] = (mahr >> 0) & 0xFF;
153 addr[4] = (malr >> 8) & 0xFF;
154 addr[5] = (malr >> 0) & 0xFF;
155 eth_hw_addr_set(ndev, addr);
156 }
157 }
158
ravb_mdio_ctrl(struct mdiobb_ctrl * ctrl,u32 mask,int set)159 static void ravb_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
160 {
161 struct ravb_private *priv = container_of(ctrl, struct ravb_private,
162 mdiobb);
163
164 ravb_modify(priv->ndev, PIR, mask, set ? mask : 0);
165 }
166
167 /* MDC pin control */
ravb_set_mdc(struct mdiobb_ctrl * ctrl,int level)168 static void ravb_set_mdc(struct mdiobb_ctrl *ctrl, int level)
169 {
170 ravb_mdio_ctrl(ctrl, PIR_MDC, level);
171 }
172
173 /* Data I/O pin control */
ravb_set_mdio_dir(struct mdiobb_ctrl * ctrl,int output)174 static void ravb_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output)
175 {
176 ravb_mdio_ctrl(ctrl, PIR_MMD, output);
177 }
178
179 /* Set data bit */
ravb_set_mdio_data(struct mdiobb_ctrl * ctrl,int value)180 static void ravb_set_mdio_data(struct mdiobb_ctrl *ctrl, int value)
181 {
182 ravb_mdio_ctrl(ctrl, PIR_MDO, value);
183 }
184
185 /* Get data bit */
ravb_get_mdio_data(struct mdiobb_ctrl * ctrl)186 static int ravb_get_mdio_data(struct mdiobb_ctrl *ctrl)
187 {
188 struct ravb_private *priv = container_of(ctrl, struct ravb_private,
189 mdiobb);
190
191 return (ravb_read(priv->ndev, PIR) & PIR_MDI) != 0;
192 }
193
194 /* MDIO bus control struct */
195 static const struct mdiobb_ops bb_ops = {
196 .owner = THIS_MODULE,
197 .set_mdc = ravb_set_mdc,
198 .set_mdio_dir = ravb_set_mdio_dir,
199 .set_mdio_data = ravb_set_mdio_data,
200 .get_mdio_data = ravb_get_mdio_data,
201 };
202
203 /* Free TX skb function for AVB-IP */
ravb_tx_free(struct net_device * ndev,int q,bool free_txed_only)204 static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
205 {
206 struct ravb_private *priv = netdev_priv(ndev);
207 struct net_device_stats *stats = &priv->stats[q];
208 unsigned int num_tx_desc = priv->num_tx_desc;
209 struct ravb_tx_desc *desc;
210 unsigned int entry;
211 int free_num = 0;
212 u32 size;
213
214 for (; priv->cur_tx[q] - priv->dirty_tx[q] > 0; priv->dirty_tx[q]++) {
215 bool txed;
216
217 entry = priv->dirty_tx[q] % (priv->num_tx_ring[q] *
218 num_tx_desc);
219 desc = &priv->tx_ring[q][entry];
220 txed = desc->die_dt == DT_FEMPTY;
221 if (free_txed_only && !txed)
222 break;
223 /* Descriptor type must be checked before all other reads */
224 dma_rmb();
225 size = le16_to_cpu(desc->ds_tagl) & TX_DS;
226 /* Free the original skb. */
227 if (priv->tx_skb[q][entry / num_tx_desc]) {
228 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
229 size, DMA_TO_DEVICE);
230 /* Last packet descriptor? */
231 if (entry % num_tx_desc == num_tx_desc - 1) {
232 entry /= num_tx_desc;
233 dev_kfree_skb_any(priv->tx_skb[q][entry]);
234 priv->tx_skb[q][entry] = NULL;
235 if (txed)
236 stats->tx_packets++;
237 }
238 free_num++;
239 }
240 if (txed)
241 stats->tx_bytes += size;
242 desc->die_dt = DT_EEMPTY;
243 }
244 return free_num;
245 }
246
ravb_rx_ring_free_gbeth(struct net_device * ndev,int q)247 static void ravb_rx_ring_free_gbeth(struct net_device *ndev, int q)
248 {
249 struct ravb_private *priv = netdev_priv(ndev);
250 unsigned int ring_size;
251 unsigned int i;
252
253 if (!priv->gbeth_rx_ring)
254 return;
255
256 for (i = 0; i < priv->num_rx_ring[q]; i++) {
257 struct ravb_rx_desc *desc = &priv->gbeth_rx_ring[i];
258
259 if (!dma_mapping_error(ndev->dev.parent,
260 le32_to_cpu(desc->dptr)))
261 dma_unmap_single(ndev->dev.parent,
262 le32_to_cpu(desc->dptr),
263 GBETH_RX_BUFF_MAX,
264 DMA_FROM_DEVICE);
265 }
266 ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
267 dma_free_coherent(ndev->dev.parent, ring_size, priv->gbeth_rx_ring,
268 priv->rx_desc_dma[q]);
269 priv->gbeth_rx_ring = NULL;
270 }
271
ravb_rx_ring_free_rcar(struct net_device * ndev,int q)272 static void ravb_rx_ring_free_rcar(struct net_device *ndev, int q)
273 {
274 struct ravb_private *priv = netdev_priv(ndev);
275 unsigned int ring_size;
276 unsigned int i;
277
278 if (!priv->rx_ring[q])
279 return;
280
281 for (i = 0; i < priv->num_rx_ring[q]; i++) {
282 struct ravb_ex_rx_desc *desc = &priv->rx_ring[q][i];
283
284 if (!dma_mapping_error(ndev->dev.parent,
285 le32_to_cpu(desc->dptr)))
286 dma_unmap_single(ndev->dev.parent,
287 le32_to_cpu(desc->dptr),
288 RX_BUF_SZ,
289 DMA_FROM_DEVICE);
290 }
291 ring_size = sizeof(struct ravb_ex_rx_desc) *
292 (priv->num_rx_ring[q] + 1);
293 dma_free_coherent(ndev->dev.parent, ring_size, priv->rx_ring[q],
294 priv->rx_desc_dma[q]);
295 priv->rx_ring[q] = NULL;
296 }
297
298 /* Free skb's and DMA buffers for Ethernet AVB */
ravb_ring_free(struct net_device * ndev,int q)299 static void ravb_ring_free(struct net_device *ndev, int q)
300 {
301 struct ravb_private *priv = netdev_priv(ndev);
302 const struct ravb_hw_info *info = priv->info;
303 unsigned int num_tx_desc = priv->num_tx_desc;
304 unsigned int ring_size;
305 unsigned int i;
306
307 info->rx_ring_free(ndev, q);
308
309 if (priv->tx_ring[q]) {
310 ravb_tx_free(ndev, q, false);
311
312 ring_size = sizeof(struct ravb_tx_desc) *
313 (priv->num_tx_ring[q] * num_tx_desc + 1);
314 dma_free_coherent(ndev->dev.parent, ring_size, priv->tx_ring[q],
315 priv->tx_desc_dma[q]);
316 priv->tx_ring[q] = NULL;
317 }
318
319 /* Free RX skb ringbuffer */
320 if (priv->rx_skb[q]) {
321 for (i = 0; i < priv->num_rx_ring[q]; i++)
322 dev_kfree_skb(priv->rx_skb[q][i]);
323 }
324 kfree(priv->rx_skb[q]);
325 priv->rx_skb[q] = NULL;
326
327 /* Free aligned TX buffers */
328 kfree(priv->tx_align[q]);
329 priv->tx_align[q] = NULL;
330
331 /* Free TX skb ringbuffer.
332 * SKBs are freed by ravb_tx_free() call above.
333 */
334 kfree(priv->tx_skb[q]);
335 priv->tx_skb[q] = NULL;
336 }
337
ravb_rx_ring_format_gbeth(struct net_device * ndev,int q)338 static void ravb_rx_ring_format_gbeth(struct net_device *ndev, int q)
339 {
340 struct ravb_private *priv = netdev_priv(ndev);
341 struct ravb_rx_desc *rx_desc;
342 unsigned int rx_ring_size;
343 dma_addr_t dma_addr;
344 unsigned int i;
345
346 rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
347 memset(priv->gbeth_rx_ring, 0, rx_ring_size);
348 /* Build RX ring buffer */
349 for (i = 0; i < priv->num_rx_ring[q]; i++) {
350 /* RX descriptor */
351 rx_desc = &priv->gbeth_rx_ring[i];
352 rx_desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
353 dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
354 GBETH_RX_BUFF_MAX,
355 DMA_FROM_DEVICE);
356 /* We just set the data size to 0 for a failed mapping which
357 * should prevent DMA from happening...
358 */
359 if (dma_mapping_error(ndev->dev.parent, dma_addr))
360 rx_desc->ds_cc = cpu_to_le16(0);
361 rx_desc->dptr = cpu_to_le32(dma_addr);
362 rx_desc->die_dt = DT_FEMPTY;
363 }
364 rx_desc = &priv->gbeth_rx_ring[i];
365 rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
366 rx_desc->die_dt = DT_LINKFIX; /* type */
367 }
368
ravb_rx_ring_format_rcar(struct net_device * ndev,int q)369 static void ravb_rx_ring_format_rcar(struct net_device *ndev, int q)
370 {
371 struct ravb_private *priv = netdev_priv(ndev);
372 struct ravb_ex_rx_desc *rx_desc;
373 unsigned int rx_ring_size = sizeof(*rx_desc) * priv->num_rx_ring[q];
374 dma_addr_t dma_addr;
375 unsigned int i;
376
377 memset(priv->rx_ring[q], 0, rx_ring_size);
378 /* Build RX ring buffer */
379 for (i = 0; i < priv->num_rx_ring[q]; i++) {
380 /* RX descriptor */
381 rx_desc = &priv->rx_ring[q][i];
382 rx_desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
383 dma_addr = dma_map_single(ndev->dev.parent, priv->rx_skb[q][i]->data,
384 RX_BUF_SZ,
385 DMA_FROM_DEVICE);
386 /* We just set the data size to 0 for a failed mapping which
387 * should prevent DMA from happening...
388 */
389 if (dma_mapping_error(ndev->dev.parent, dma_addr))
390 rx_desc->ds_cc = cpu_to_le16(0);
391 rx_desc->dptr = cpu_to_le32(dma_addr);
392 rx_desc->die_dt = DT_FEMPTY;
393 }
394 rx_desc = &priv->rx_ring[q][i];
395 rx_desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
396 rx_desc->die_dt = DT_LINKFIX; /* type */
397 }
398
399 /* Format skb and descriptor buffer for Ethernet AVB */
ravb_ring_format(struct net_device * ndev,int q)400 static void ravb_ring_format(struct net_device *ndev, int q)
401 {
402 struct ravb_private *priv = netdev_priv(ndev);
403 const struct ravb_hw_info *info = priv->info;
404 unsigned int num_tx_desc = priv->num_tx_desc;
405 struct ravb_tx_desc *tx_desc;
406 struct ravb_desc *desc;
407 unsigned int tx_ring_size = sizeof(*tx_desc) * priv->num_tx_ring[q] *
408 num_tx_desc;
409 unsigned int i;
410
411 priv->cur_rx[q] = 0;
412 priv->cur_tx[q] = 0;
413 priv->dirty_rx[q] = 0;
414 priv->dirty_tx[q] = 0;
415
416 info->rx_ring_format(ndev, q);
417
418 memset(priv->tx_ring[q], 0, tx_ring_size);
419 /* Build TX ring buffer */
420 for (i = 0, tx_desc = priv->tx_ring[q]; i < priv->num_tx_ring[q];
421 i++, tx_desc++) {
422 tx_desc->die_dt = DT_EEMPTY;
423 if (num_tx_desc > 1) {
424 tx_desc++;
425 tx_desc->die_dt = DT_EEMPTY;
426 }
427 }
428 tx_desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
429 tx_desc->die_dt = DT_LINKFIX; /* type */
430
431 /* RX descriptor base address for best effort */
432 desc = &priv->desc_bat[RX_QUEUE_OFFSET + q];
433 desc->die_dt = DT_LINKFIX; /* type */
434 desc->dptr = cpu_to_le32((u32)priv->rx_desc_dma[q]);
435
436 /* TX descriptor base address for best effort */
437 desc = &priv->desc_bat[q];
438 desc->die_dt = DT_LINKFIX; /* type */
439 desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
440 }
441
ravb_alloc_rx_desc_gbeth(struct net_device * ndev,int q)442 static void *ravb_alloc_rx_desc_gbeth(struct net_device *ndev, int q)
443 {
444 struct ravb_private *priv = netdev_priv(ndev);
445 unsigned int ring_size;
446
447 ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
448
449 priv->gbeth_rx_ring = dma_alloc_coherent(ndev->dev.parent, ring_size,
450 &priv->rx_desc_dma[q],
451 GFP_KERNEL);
452 return priv->gbeth_rx_ring;
453 }
454
ravb_alloc_rx_desc_rcar(struct net_device * ndev,int q)455 static void *ravb_alloc_rx_desc_rcar(struct net_device *ndev, int q)
456 {
457 struct ravb_private *priv = netdev_priv(ndev);
458 unsigned int ring_size;
459
460 ring_size = sizeof(struct ravb_ex_rx_desc) * (priv->num_rx_ring[q] + 1);
461
462 priv->rx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
463 &priv->rx_desc_dma[q],
464 GFP_KERNEL);
465 return priv->rx_ring[q];
466 }
467
468 /* Init skb and descriptor buffer for Ethernet AVB */
ravb_ring_init(struct net_device * ndev,int q)469 static int ravb_ring_init(struct net_device *ndev, int q)
470 {
471 struct ravb_private *priv = netdev_priv(ndev);
472 const struct ravb_hw_info *info = priv->info;
473 unsigned int num_tx_desc = priv->num_tx_desc;
474 unsigned int ring_size;
475 struct sk_buff *skb;
476 unsigned int i;
477
478 /* Allocate RX and TX skb rings */
479 priv->rx_skb[q] = kcalloc(priv->num_rx_ring[q],
480 sizeof(*priv->rx_skb[q]), GFP_KERNEL);
481 priv->tx_skb[q] = kcalloc(priv->num_tx_ring[q],
482 sizeof(*priv->tx_skb[q]), GFP_KERNEL);
483 if (!priv->rx_skb[q] || !priv->tx_skb[q])
484 goto error;
485
486 for (i = 0; i < priv->num_rx_ring[q]; i++) {
487 skb = __netdev_alloc_skb(ndev, info->max_rx_len, GFP_KERNEL);
488 if (!skb)
489 goto error;
490 ravb_set_buffer_align(skb);
491 priv->rx_skb[q][i] = skb;
492 }
493
494 if (num_tx_desc > 1) {
495 /* Allocate rings for the aligned buffers */
496 priv->tx_align[q] = kmalloc(DPTR_ALIGN * priv->num_tx_ring[q] +
497 DPTR_ALIGN - 1, GFP_KERNEL);
498 if (!priv->tx_align[q])
499 goto error;
500 }
501
502 /* Allocate all RX descriptors. */
503 if (!info->alloc_rx_desc(ndev, q))
504 goto error;
505
506 priv->dirty_rx[q] = 0;
507
508 /* Allocate all TX descriptors. */
509 ring_size = sizeof(struct ravb_tx_desc) *
510 (priv->num_tx_ring[q] * num_tx_desc + 1);
511 priv->tx_ring[q] = dma_alloc_coherent(ndev->dev.parent, ring_size,
512 &priv->tx_desc_dma[q],
513 GFP_KERNEL);
514 if (!priv->tx_ring[q])
515 goto error;
516
517 return 0;
518
519 error:
520 ravb_ring_free(ndev, q);
521
522 return -ENOMEM;
523 }
524
ravb_emac_init_gbeth(struct net_device * ndev)525 static void ravb_emac_init_gbeth(struct net_device *ndev)
526 {
527 struct ravb_private *priv = netdev_priv(ndev);
528
529 if (priv->phy_interface == PHY_INTERFACE_MODE_MII) {
530 ravb_write(ndev, (1000 << 16) | CXR35_SEL_XMII_MII, CXR35);
531 ravb_modify(ndev, CXR31, CXR31_SEL_LINK0 | CXR31_SEL_LINK1, 0);
532 } else {
533 ravb_write(ndev, (1000 << 16) | CXR35_SEL_XMII_RGMII, CXR35);
534 ravb_modify(ndev, CXR31, CXR31_SEL_LINK0 | CXR31_SEL_LINK1,
535 CXR31_SEL_LINK0);
536 }
537
538 /* Receive frame limit set register */
539 ravb_write(ndev, GBETH_RX_BUFF_MAX + ETH_FCS_LEN, RFLR);
540
541 /* EMAC Mode: PAUSE prohibition; Duplex; TX; RX; CRC Pass Through */
542 ravb_write(ndev, ECMR_ZPF | ((priv->duplex > 0) ? ECMR_DM : 0) |
543 ECMR_TE | ECMR_RE | ECMR_RCPT |
544 ECMR_TXF | ECMR_RXF, ECMR);
545
546 ravb_set_rate_gbeth(ndev);
547
548 /* Set MAC address */
549 ravb_write(ndev,
550 (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
551 (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
552 ravb_write(ndev, (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
553
554 /* E-MAC status register clear */
555 ravb_write(ndev, ECSR_ICD | ECSR_LCHNG | ECSR_PFRI, ECSR);
556 ravb_write(ndev, CSR0_TPE | CSR0_RPE, CSR0);
557
558 /* E-MAC interrupt enable register */
559 ravb_write(ndev, ECSIPR_ICDIP, ECSIPR);
560 }
561
ravb_emac_init_rcar(struct net_device * ndev)562 static void ravb_emac_init_rcar(struct net_device *ndev)
563 {
564 /* Receive frame limit set register */
565 ravb_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN, RFLR);
566
567 /* EMAC Mode: PAUSE prohibition; Duplex; RX Checksum; TX; RX */
568 ravb_write(ndev, ECMR_ZPF | ECMR_DM |
569 (ndev->features & NETIF_F_RXCSUM ? ECMR_RCSC : 0) |
570 ECMR_TE | ECMR_RE, ECMR);
571
572 ravb_set_rate_rcar(ndev);
573
574 /* Set MAC address */
575 ravb_write(ndev,
576 (ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
577 (ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
578 ravb_write(ndev,
579 (ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
580
581 /* E-MAC status register clear */
582 ravb_write(ndev, ECSR_ICD | ECSR_MPD, ECSR);
583
584 /* E-MAC interrupt enable register */
585 ravb_write(ndev, ECSIPR_ICDIP | ECSIPR_MPDIP | ECSIPR_LCHNGIP, ECSIPR);
586 }
587
588 /* E-MAC init function */
ravb_emac_init(struct net_device * ndev)589 static void ravb_emac_init(struct net_device *ndev)
590 {
591 struct ravb_private *priv = netdev_priv(ndev);
592 const struct ravb_hw_info *info = priv->info;
593
594 info->emac_init(ndev);
595 }
596
ravb_dmac_init_gbeth(struct net_device * ndev)597 static int ravb_dmac_init_gbeth(struct net_device *ndev)
598 {
599 int error;
600
601 error = ravb_ring_init(ndev, RAVB_BE);
602 if (error)
603 return error;
604
605 /* Descriptor format */
606 ravb_ring_format(ndev, RAVB_BE);
607
608 /* Set DMAC RX */
609 ravb_write(ndev, 0x60000000, RCR);
610
611 /* Set Max Frame Length (RTC) */
612 ravb_write(ndev, 0x7ffc0000 | GBETH_RX_BUFF_MAX, RTC);
613
614 /* Set FIFO size */
615 ravb_write(ndev, 0x00222200, TGC);
616
617 ravb_write(ndev, 0, TCCR);
618
619 /* Frame receive */
620 ravb_write(ndev, RIC0_FRE0, RIC0);
621 /* Disable FIFO full warning */
622 ravb_write(ndev, 0x0, RIC1);
623 /* Receive FIFO full error, descriptor empty */
624 ravb_write(ndev, RIC2_QFE0 | RIC2_RFFE, RIC2);
625
626 ravb_write(ndev, TIC_FTE0, TIC);
627
628 return 0;
629 }
630
ravb_dmac_init_rcar(struct net_device * ndev)631 static int ravb_dmac_init_rcar(struct net_device *ndev)
632 {
633 struct ravb_private *priv = netdev_priv(ndev);
634 const struct ravb_hw_info *info = priv->info;
635 int error;
636
637 error = ravb_ring_init(ndev, RAVB_BE);
638 if (error)
639 return error;
640 error = ravb_ring_init(ndev, RAVB_NC);
641 if (error) {
642 ravb_ring_free(ndev, RAVB_BE);
643 return error;
644 }
645
646 /* Descriptor format */
647 ravb_ring_format(ndev, RAVB_BE);
648 ravb_ring_format(ndev, RAVB_NC);
649
650 /* Set AVB RX */
651 ravb_write(ndev,
652 RCR_EFFS | RCR_ENCF | RCR_ETS0 | RCR_ESF | 0x18000000, RCR);
653
654 /* Set FIFO size */
655 ravb_write(ndev, TGC_TQP_AVBMODE1 | 0x00112200, TGC);
656
657 /* Timestamp enable */
658 ravb_write(ndev, TCCR_TFEN, TCCR);
659
660 /* Interrupt init: */
661 if (info->multi_irqs) {
662 /* Clear DIL.DPLx */
663 ravb_write(ndev, 0, DIL);
664 /* Set queue specific interrupt */
665 ravb_write(ndev, CIE_CRIE | CIE_CTIE | CIE_CL0M, CIE);
666 }
667 /* Frame receive */
668 ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);
669 /* Disable FIFO full warning */
670 ravb_write(ndev, 0, RIC1);
671 /* Receive FIFO full error, descriptor empty */
672 ravb_write(ndev, RIC2_QFE0 | RIC2_QFE1 | RIC2_RFFE, RIC2);
673 /* Frame transmitted, timestamp FIFO updated */
674 ravb_write(ndev, TIC_FTE0 | TIC_FTE1 | TIC_TFUE, TIC);
675
676 return 0;
677 }
678
679 /* Device init function for Ethernet AVB */
ravb_dmac_init(struct net_device * ndev)680 static int ravb_dmac_init(struct net_device *ndev)
681 {
682 struct ravb_private *priv = netdev_priv(ndev);
683 const struct ravb_hw_info *info = priv->info;
684 int error;
685
686 /* Set CONFIG mode */
687 error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
688 if (error)
689 return error;
690
691 error = info->dmac_init(ndev);
692 if (error)
693 return error;
694
695 /* Setting the control will start the AVB-DMAC process. */
696 return ravb_set_opmode(ndev, CCC_OPC_OPERATION);
697 }
698
ravb_get_tx_tstamp(struct net_device * ndev)699 static void ravb_get_tx_tstamp(struct net_device *ndev)
700 {
701 struct ravb_private *priv = netdev_priv(ndev);
702 struct ravb_tstamp_skb *ts_skb, *ts_skb2;
703 struct skb_shared_hwtstamps shhwtstamps;
704 struct sk_buff *skb;
705 struct timespec64 ts;
706 u16 tag, tfa_tag;
707 int count;
708 u32 tfa2;
709
710 count = (ravb_read(ndev, TSR) & TSR_TFFL) >> 8;
711 while (count--) {
712 tfa2 = ravb_read(ndev, TFA2);
713 tfa_tag = (tfa2 & TFA2_TST) >> 16;
714 ts.tv_nsec = (u64)ravb_read(ndev, TFA0);
715 ts.tv_sec = ((u64)(tfa2 & TFA2_TSV) << 32) |
716 ravb_read(ndev, TFA1);
717 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
718 shhwtstamps.hwtstamp = timespec64_to_ktime(ts);
719 list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list,
720 list) {
721 skb = ts_skb->skb;
722 tag = ts_skb->tag;
723 list_del(&ts_skb->list);
724 kfree(ts_skb);
725 if (tag == tfa_tag) {
726 skb_tstamp_tx(skb, &shhwtstamps);
727 dev_consume_skb_any(skb);
728 break;
729 } else {
730 dev_kfree_skb_any(skb);
731 }
732 }
733 ravb_modify(ndev, TCCR, TCCR_TFR, TCCR_TFR);
734 }
735 }
736
ravb_rx_csum(struct sk_buff * skb)737 static void ravb_rx_csum(struct sk_buff *skb)
738 {
739 u8 *hw_csum;
740
741 /* The hardware checksum is contained in sizeof(__sum16) (2) bytes
742 * appended to packet data
743 */
744 if (unlikely(skb->len < sizeof(__sum16)))
745 return;
746 hw_csum = skb_tail_pointer(skb) - sizeof(__sum16);
747 skb->csum = csum_unfold((__force __sum16)get_unaligned_le16(hw_csum));
748 skb->ip_summed = CHECKSUM_COMPLETE;
749 skb_trim(skb, skb->len - sizeof(__sum16));
750 }
751
ravb_get_skb_gbeth(struct net_device * ndev,int entry,struct ravb_rx_desc * desc)752 static struct sk_buff *ravb_get_skb_gbeth(struct net_device *ndev, int entry,
753 struct ravb_rx_desc *desc)
754 {
755 struct ravb_private *priv = netdev_priv(ndev);
756 struct sk_buff *skb;
757
758 skb = priv->rx_skb[RAVB_BE][entry];
759 priv->rx_skb[RAVB_BE][entry] = NULL;
760 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
761 ALIGN(GBETH_RX_BUFF_MAX, 16), DMA_FROM_DEVICE);
762
763 return skb;
764 }
765
766 /* Packet receive function for Gigabit Ethernet */
ravb_rx_gbeth(struct net_device * ndev,int * quota,int q)767 static bool ravb_rx_gbeth(struct net_device *ndev, int *quota, int q)
768 {
769 struct ravb_private *priv = netdev_priv(ndev);
770 const struct ravb_hw_info *info = priv->info;
771 struct net_device_stats *stats;
772 struct ravb_rx_desc *desc;
773 struct sk_buff *skb;
774 dma_addr_t dma_addr;
775 u8 desc_status;
776 int boguscnt;
777 u16 pkt_len;
778 u8 die_dt;
779 int entry;
780 int limit;
781
782 entry = priv->cur_rx[q] % priv->num_rx_ring[q];
783 boguscnt = priv->dirty_rx[q] + priv->num_rx_ring[q] - priv->cur_rx[q];
784 stats = &priv->stats[q];
785
786 boguscnt = min(boguscnt, *quota);
787 limit = boguscnt;
788 desc = &priv->gbeth_rx_ring[entry];
789 while (desc->die_dt != DT_FEMPTY) {
790 /* Descriptor type must be checked before all other reads */
791 dma_rmb();
792 desc_status = desc->msc;
793 pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS;
794
795 if (--boguscnt < 0)
796 break;
797
798 /* We use 0-byte descriptors to mark the DMA mapping errors */
799 if (!pkt_len)
800 continue;
801
802 if (desc_status & MSC_MC)
803 stats->multicast++;
804
805 if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF | MSC_CEEF)) {
806 stats->rx_errors++;
807 if (desc_status & MSC_CRC)
808 stats->rx_crc_errors++;
809 if (desc_status & MSC_RFE)
810 stats->rx_frame_errors++;
811 if (desc_status & (MSC_RTLF | MSC_RTSF))
812 stats->rx_length_errors++;
813 if (desc_status & MSC_CEEF)
814 stats->rx_missed_errors++;
815 } else {
816 die_dt = desc->die_dt & 0xF0;
817 switch (die_dt) {
818 case DT_FSINGLE:
819 skb = ravb_get_skb_gbeth(ndev, entry, desc);
820 skb_put(skb, pkt_len);
821 skb->protocol = eth_type_trans(skb, ndev);
822 napi_gro_receive(&priv->napi[q], skb);
823 stats->rx_packets++;
824 stats->rx_bytes += pkt_len;
825 break;
826 case DT_FSTART:
827 priv->rx_1st_skb = ravb_get_skb_gbeth(ndev, entry, desc);
828 skb_put(priv->rx_1st_skb, pkt_len);
829 break;
830 case DT_FMID:
831 skb = ravb_get_skb_gbeth(ndev, entry, desc);
832 skb_copy_to_linear_data_offset(priv->rx_1st_skb,
833 priv->rx_1st_skb->len,
834 skb->data,
835 pkt_len);
836 skb_put(priv->rx_1st_skb, pkt_len);
837 dev_kfree_skb(skb);
838 break;
839 case DT_FEND:
840 skb = ravb_get_skb_gbeth(ndev, entry, desc);
841 skb_copy_to_linear_data_offset(priv->rx_1st_skb,
842 priv->rx_1st_skb->len,
843 skb->data,
844 pkt_len);
845 skb_put(priv->rx_1st_skb, pkt_len);
846 dev_kfree_skb(skb);
847 priv->rx_1st_skb->protocol =
848 eth_type_trans(priv->rx_1st_skb, ndev);
849 napi_gro_receive(&priv->napi[q],
850 priv->rx_1st_skb);
851 stats->rx_packets++;
852 stats->rx_bytes += pkt_len;
853 break;
854 }
855 }
856
857 entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
858 desc = &priv->gbeth_rx_ring[entry];
859 }
860
861 /* Refill the RX ring buffers. */
862 for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
863 entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
864 desc = &priv->gbeth_rx_ring[entry];
865 desc->ds_cc = cpu_to_le16(GBETH_RX_DESC_DATA_SIZE);
866
867 if (!priv->rx_skb[q][entry]) {
868 skb = netdev_alloc_skb(ndev, info->max_rx_len);
869 if (!skb)
870 break;
871 ravb_set_buffer_align(skb);
872 dma_addr = dma_map_single(ndev->dev.parent,
873 skb->data,
874 GBETH_RX_BUFF_MAX,
875 DMA_FROM_DEVICE);
876 skb_checksum_none_assert(skb);
877 /* We just set the data size to 0 for a failed mapping
878 * which should prevent DMA from happening...
879 */
880 if (dma_mapping_error(ndev->dev.parent, dma_addr))
881 desc->ds_cc = cpu_to_le16(0);
882 desc->dptr = cpu_to_le32(dma_addr);
883 priv->rx_skb[q][entry] = skb;
884 }
885 /* Descriptor type must be set after all the above writes */
886 dma_wmb();
887 desc->die_dt = DT_FEMPTY;
888 }
889
890 *quota -= limit - (++boguscnt);
891
892 return boguscnt <= 0;
893 }
894
895 /* Packet receive function for Ethernet AVB */
ravb_rx_rcar(struct net_device * ndev,int * quota,int q)896 static bool ravb_rx_rcar(struct net_device *ndev, int *quota, int q)
897 {
898 struct ravb_private *priv = netdev_priv(ndev);
899 const struct ravb_hw_info *info = priv->info;
900 int entry = priv->cur_rx[q] % priv->num_rx_ring[q];
901 int boguscnt = (priv->dirty_rx[q] + priv->num_rx_ring[q]) -
902 priv->cur_rx[q];
903 struct net_device_stats *stats = &priv->stats[q];
904 struct ravb_ex_rx_desc *desc;
905 struct sk_buff *skb;
906 dma_addr_t dma_addr;
907 struct timespec64 ts;
908 u8 desc_status;
909 u16 pkt_len;
910 int limit;
911
912 boguscnt = min(boguscnt, *quota);
913 limit = boguscnt;
914 desc = &priv->rx_ring[q][entry];
915 while (desc->die_dt != DT_FEMPTY) {
916 /* Descriptor type must be checked before all other reads */
917 dma_rmb();
918 desc_status = desc->msc;
919 pkt_len = le16_to_cpu(desc->ds_cc) & RX_DS;
920
921 if (--boguscnt < 0)
922 break;
923
924 /* We use 0-byte descriptors to mark the DMA mapping errors */
925 if (!pkt_len)
926 continue;
927
928 if (desc_status & MSC_MC)
929 stats->multicast++;
930
931 if (desc_status & (MSC_CRC | MSC_RFE | MSC_RTSF | MSC_RTLF |
932 MSC_CEEF)) {
933 stats->rx_errors++;
934 if (desc_status & MSC_CRC)
935 stats->rx_crc_errors++;
936 if (desc_status & MSC_RFE)
937 stats->rx_frame_errors++;
938 if (desc_status & (MSC_RTLF | MSC_RTSF))
939 stats->rx_length_errors++;
940 if (desc_status & MSC_CEEF)
941 stats->rx_missed_errors++;
942 } else {
943 u32 get_ts = priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE;
944
945 skb = priv->rx_skb[q][entry];
946 priv->rx_skb[q][entry] = NULL;
947 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
948 RX_BUF_SZ,
949 DMA_FROM_DEVICE);
950 get_ts &= (q == RAVB_NC) ?
951 RAVB_RXTSTAMP_TYPE_V2_L2_EVENT :
952 ~RAVB_RXTSTAMP_TYPE_V2_L2_EVENT;
953 if (get_ts) {
954 struct skb_shared_hwtstamps *shhwtstamps;
955
956 shhwtstamps = skb_hwtstamps(skb);
957 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
958 ts.tv_sec = ((u64) le16_to_cpu(desc->ts_sh) <<
959 32) | le32_to_cpu(desc->ts_sl);
960 ts.tv_nsec = le32_to_cpu(desc->ts_n);
961 shhwtstamps->hwtstamp = timespec64_to_ktime(ts);
962 }
963
964 skb_put(skb, pkt_len);
965 skb->protocol = eth_type_trans(skb, ndev);
966 if (ndev->features & NETIF_F_RXCSUM)
967 ravb_rx_csum(skb);
968 napi_gro_receive(&priv->napi[q], skb);
969 stats->rx_packets++;
970 stats->rx_bytes += pkt_len;
971 }
972
973 entry = (++priv->cur_rx[q]) % priv->num_rx_ring[q];
974 desc = &priv->rx_ring[q][entry];
975 }
976
977 /* Refill the RX ring buffers. */
978 for (; priv->cur_rx[q] - priv->dirty_rx[q] > 0; priv->dirty_rx[q]++) {
979 entry = priv->dirty_rx[q] % priv->num_rx_ring[q];
980 desc = &priv->rx_ring[q][entry];
981 desc->ds_cc = cpu_to_le16(RX_BUF_SZ);
982
983 if (!priv->rx_skb[q][entry]) {
984 skb = netdev_alloc_skb(ndev, info->max_rx_len);
985 if (!skb)
986 break; /* Better luck next round. */
987 ravb_set_buffer_align(skb);
988 dma_addr = dma_map_single(ndev->dev.parent, skb->data,
989 le16_to_cpu(desc->ds_cc),
990 DMA_FROM_DEVICE);
991 skb_checksum_none_assert(skb);
992 /* We just set the data size to 0 for a failed mapping
993 * which should prevent DMA from happening...
994 */
995 if (dma_mapping_error(ndev->dev.parent, dma_addr))
996 desc->ds_cc = cpu_to_le16(0);
997 desc->dptr = cpu_to_le32(dma_addr);
998 priv->rx_skb[q][entry] = skb;
999 }
1000 /* Descriptor type must be set after all the above writes */
1001 dma_wmb();
1002 desc->die_dt = DT_FEMPTY;
1003 }
1004
1005 *quota -= limit - (++boguscnt);
1006
1007 return boguscnt <= 0;
1008 }
1009
1010 /* Packet receive function for Ethernet AVB */
ravb_rx(struct net_device * ndev,int * quota,int q)1011 static bool ravb_rx(struct net_device *ndev, int *quota, int q)
1012 {
1013 struct ravb_private *priv = netdev_priv(ndev);
1014 const struct ravb_hw_info *info = priv->info;
1015
1016 return info->receive(ndev, quota, q);
1017 }
1018
ravb_rcv_snd_disable(struct net_device * ndev)1019 static void ravb_rcv_snd_disable(struct net_device *ndev)
1020 {
1021 /* Disable TX and RX */
1022 ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
1023 }
1024
ravb_rcv_snd_enable(struct net_device * ndev)1025 static void ravb_rcv_snd_enable(struct net_device *ndev)
1026 {
1027 /* Enable TX and RX */
1028 ravb_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
1029 }
1030
1031 /* function for waiting dma process finished */
ravb_stop_dma(struct net_device * ndev)1032 static int ravb_stop_dma(struct net_device *ndev)
1033 {
1034 struct ravb_private *priv = netdev_priv(ndev);
1035 const struct ravb_hw_info *info = priv->info;
1036 int error;
1037
1038 /* Wait for stopping the hardware TX process */
1039 error = ravb_wait(ndev, TCCR, info->tccr_mask, 0);
1040
1041 if (error)
1042 return error;
1043
1044 error = ravb_wait(ndev, CSR, CSR_TPO0 | CSR_TPO1 | CSR_TPO2 | CSR_TPO3,
1045 0);
1046 if (error)
1047 return error;
1048
1049 /* Stop the E-MAC's RX/TX processes. */
1050 ravb_rcv_snd_disable(ndev);
1051
1052 /* Wait for stopping the RX DMA process */
1053 error = ravb_wait(ndev, CSR, CSR_RPO, 0);
1054 if (error)
1055 return error;
1056
1057 /* Stop AVB-DMAC process */
1058 return ravb_set_opmode(ndev, CCC_OPC_CONFIG);
1059 }
1060
1061 /* E-MAC interrupt handler */
ravb_emac_interrupt_unlocked(struct net_device * ndev)1062 static void ravb_emac_interrupt_unlocked(struct net_device *ndev)
1063 {
1064 struct ravb_private *priv = netdev_priv(ndev);
1065 u32 ecsr, psr;
1066
1067 ecsr = ravb_read(ndev, ECSR);
1068 ravb_write(ndev, ecsr, ECSR); /* clear interrupt */
1069
1070 if (ecsr & ECSR_MPD)
1071 pm_wakeup_event(&priv->pdev->dev, 0);
1072 if (ecsr & ECSR_ICD)
1073 ndev->stats.tx_carrier_errors++;
1074 if (ecsr & ECSR_LCHNG) {
1075 /* Link changed */
1076 if (priv->no_avb_link)
1077 return;
1078 psr = ravb_read(ndev, PSR);
1079 if (priv->avb_link_active_low)
1080 psr ^= PSR_LMON;
1081 if (!(psr & PSR_LMON)) {
1082 /* DIsable RX and TX */
1083 ravb_rcv_snd_disable(ndev);
1084 } else {
1085 /* Enable RX and TX */
1086 ravb_rcv_snd_enable(ndev);
1087 }
1088 }
1089 }
1090
ravb_emac_interrupt(int irq,void * dev_id)1091 static irqreturn_t ravb_emac_interrupt(int irq, void *dev_id)
1092 {
1093 struct net_device *ndev = dev_id;
1094 struct ravb_private *priv = netdev_priv(ndev);
1095
1096 spin_lock(&priv->lock);
1097 ravb_emac_interrupt_unlocked(ndev);
1098 spin_unlock(&priv->lock);
1099 return IRQ_HANDLED;
1100 }
1101
1102 /* Error interrupt handler */
ravb_error_interrupt(struct net_device * ndev)1103 static void ravb_error_interrupt(struct net_device *ndev)
1104 {
1105 struct ravb_private *priv = netdev_priv(ndev);
1106 u32 eis, ris2;
1107
1108 eis = ravb_read(ndev, EIS);
1109 ravb_write(ndev, ~(EIS_QFS | EIS_RESERVED), EIS);
1110 if (eis & EIS_QFS) {
1111 ris2 = ravb_read(ndev, RIS2);
1112 ravb_write(ndev, ~(RIS2_QFF0 | RIS2_QFF1 | RIS2_RFFF | RIS2_RESERVED),
1113 RIS2);
1114
1115 /* Receive Descriptor Empty int */
1116 if (ris2 & RIS2_QFF0)
1117 priv->stats[RAVB_BE].rx_over_errors++;
1118
1119 /* Receive Descriptor Empty int */
1120 if (ris2 & RIS2_QFF1)
1121 priv->stats[RAVB_NC].rx_over_errors++;
1122
1123 /* Receive FIFO Overflow int */
1124 if (ris2 & RIS2_RFFF)
1125 priv->rx_fifo_errors++;
1126 }
1127 }
1128
ravb_queue_interrupt(struct net_device * ndev,int q)1129 static bool ravb_queue_interrupt(struct net_device *ndev, int q)
1130 {
1131 struct ravb_private *priv = netdev_priv(ndev);
1132 const struct ravb_hw_info *info = priv->info;
1133 u32 ris0 = ravb_read(ndev, RIS0);
1134 u32 ric0 = ravb_read(ndev, RIC0);
1135 u32 tis = ravb_read(ndev, TIS);
1136 u32 tic = ravb_read(ndev, TIC);
1137
1138 if (((ris0 & ric0) & BIT(q)) || ((tis & tic) & BIT(q))) {
1139 if (napi_schedule_prep(&priv->napi[q])) {
1140 /* Mask RX and TX interrupts */
1141 if (!info->irq_en_dis) {
1142 ravb_write(ndev, ric0 & ~BIT(q), RIC0);
1143 ravb_write(ndev, tic & ~BIT(q), TIC);
1144 } else {
1145 ravb_write(ndev, BIT(q), RID0);
1146 ravb_write(ndev, BIT(q), TID);
1147 }
1148 __napi_schedule(&priv->napi[q]);
1149 } else {
1150 netdev_warn(ndev,
1151 "ignoring interrupt, rx status 0x%08x, rx mask 0x%08x,\n",
1152 ris0, ric0);
1153 netdev_warn(ndev,
1154 " tx status 0x%08x, tx mask 0x%08x.\n",
1155 tis, tic);
1156 }
1157 return true;
1158 }
1159 return false;
1160 }
1161
ravb_timestamp_interrupt(struct net_device * ndev)1162 static bool ravb_timestamp_interrupt(struct net_device *ndev)
1163 {
1164 u32 tis = ravb_read(ndev, TIS);
1165
1166 if (tis & TIS_TFUF) {
1167 ravb_write(ndev, ~(TIS_TFUF | TIS_RESERVED), TIS);
1168 ravb_get_tx_tstamp(ndev);
1169 return true;
1170 }
1171 return false;
1172 }
1173
ravb_interrupt(int irq,void * dev_id)1174 static irqreturn_t ravb_interrupt(int irq, void *dev_id)
1175 {
1176 struct net_device *ndev = dev_id;
1177 struct ravb_private *priv = netdev_priv(ndev);
1178 const struct ravb_hw_info *info = priv->info;
1179 irqreturn_t result = IRQ_NONE;
1180 u32 iss;
1181
1182 spin_lock(&priv->lock);
1183 /* Get interrupt status */
1184 iss = ravb_read(ndev, ISS);
1185
1186 /* Received and transmitted interrupts */
1187 if (iss & (ISS_FRS | ISS_FTS | ISS_TFUS)) {
1188 int q;
1189
1190 /* Timestamp updated */
1191 if (ravb_timestamp_interrupt(ndev))
1192 result = IRQ_HANDLED;
1193
1194 /* Network control and best effort queue RX/TX */
1195 if (info->nc_queues) {
1196 for (q = RAVB_NC; q >= RAVB_BE; q--) {
1197 if (ravb_queue_interrupt(ndev, q))
1198 result = IRQ_HANDLED;
1199 }
1200 } else {
1201 if (ravb_queue_interrupt(ndev, RAVB_BE))
1202 result = IRQ_HANDLED;
1203 }
1204 }
1205
1206 /* E-MAC status summary */
1207 if (iss & ISS_MS) {
1208 ravb_emac_interrupt_unlocked(ndev);
1209 result = IRQ_HANDLED;
1210 }
1211
1212 /* Error status summary */
1213 if (iss & ISS_ES) {
1214 ravb_error_interrupt(ndev);
1215 result = IRQ_HANDLED;
1216 }
1217
1218 /* gPTP interrupt status summary */
1219 if (iss & ISS_CGIS) {
1220 ravb_ptp_interrupt(ndev);
1221 result = IRQ_HANDLED;
1222 }
1223
1224 spin_unlock(&priv->lock);
1225 return result;
1226 }
1227
1228 /* Timestamp/Error/gPTP interrupt handler */
ravb_multi_interrupt(int irq,void * dev_id)1229 static irqreturn_t ravb_multi_interrupt(int irq, void *dev_id)
1230 {
1231 struct net_device *ndev = dev_id;
1232 struct ravb_private *priv = netdev_priv(ndev);
1233 irqreturn_t result = IRQ_NONE;
1234 u32 iss;
1235
1236 spin_lock(&priv->lock);
1237 /* Get interrupt status */
1238 iss = ravb_read(ndev, ISS);
1239
1240 /* Timestamp updated */
1241 if ((iss & ISS_TFUS) && ravb_timestamp_interrupt(ndev))
1242 result = IRQ_HANDLED;
1243
1244 /* Error status summary */
1245 if (iss & ISS_ES) {
1246 ravb_error_interrupt(ndev);
1247 result = IRQ_HANDLED;
1248 }
1249
1250 /* gPTP interrupt status summary */
1251 if (iss & ISS_CGIS) {
1252 ravb_ptp_interrupt(ndev);
1253 result = IRQ_HANDLED;
1254 }
1255
1256 spin_unlock(&priv->lock);
1257 return result;
1258 }
1259
ravb_dma_interrupt(int irq,void * dev_id,int q)1260 static irqreturn_t ravb_dma_interrupt(int irq, void *dev_id, int q)
1261 {
1262 struct net_device *ndev = dev_id;
1263 struct ravb_private *priv = netdev_priv(ndev);
1264 irqreturn_t result = IRQ_NONE;
1265
1266 spin_lock(&priv->lock);
1267
1268 /* Network control/Best effort queue RX/TX */
1269 if (ravb_queue_interrupt(ndev, q))
1270 result = IRQ_HANDLED;
1271
1272 spin_unlock(&priv->lock);
1273 return result;
1274 }
1275
ravb_be_interrupt(int irq,void * dev_id)1276 static irqreturn_t ravb_be_interrupt(int irq, void *dev_id)
1277 {
1278 return ravb_dma_interrupt(irq, dev_id, RAVB_BE);
1279 }
1280
ravb_nc_interrupt(int irq,void * dev_id)1281 static irqreturn_t ravb_nc_interrupt(int irq, void *dev_id)
1282 {
1283 return ravb_dma_interrupt(irq, dev_id, RAVB_NC);
1284 }
1285
ravb_poll(struct napi_struct * napi,int budget)1286 static int ravb_poll(struct napi_struct *napi, int budget)
1287 {
1288 struct net_device *ndev = napi->dev;
1289 struct ravb_private *priv = netdev_priv(ndev);
1290 const struct ravb_hw_info *info = priv->info;
1291 unsigned long flags;
1292 int q = napi - priv->napi;
1293 int mask = BIT(q);
1294 int quota = budget;
1295 bool unmask;
1296
1297 /* Processing RX Descriptor Ring */
1298 /* Clear RX interrupt */
1299 ravb_write(ndev, ~(mask | RIS0_RESERVED), RIS0);
1300 unmask = !ravb_rx(ndev, "a, q);
1301
1302 /* Processing TX Descriptor Ring */
1303 spin_lock_irqsave(&priv->lock, flags);
1304 /* Clear TX interrupt */
1305 ravb_write(ndev, ~(mask | TIS_RESERVED), TIS);
1306 ravb_tx_free(ndev, q, true);
1307 netif_wake_subqueue(ndev, q);
1308 spin_unlock_irqrestore(&priv->lock, flags);
1309
1310 /* Receive error message handling */
1311 priv->rx_over_errors = priv->stats[RAVB_BE].rx_over_errors;
1312 if (info->nc_queues)
1313 priv->rx_over_errors += priv->stats[RAVB_NC].rx_over_errors;
1314 if (priv->rx_over_errors != ndev->stats.rx_over_errors)
1315 ndev->stats.rx_over_errors = priv->rx_over_errors;
1316 if (priv->rx_fifo_errors != ndev->stats.rx_fifo_errors)
1317 ndev->stats.rx_fifo_errors = priv->rx_fifo_errors;
1318
1319 if (!unmask)
1320 goto out;
1321
1322 napi_complete(napi);
1323
1324 /* Re-enable RX/TX interrupts */
1325 spin_lock_irqsave(&priv->lock, flags);
1326 if (!info->irq_en_dis) {
1327 ravb_modify(ndev, RIC0, mask, mask);
1328 ravb_modify(ndev, TIC, mask, mask);
1329 } else {
1330 ravb_write(ndev, mask, RIE0);
1331 ravb_write(ndev, mask, TIE);
1332 }
1333 spin_unlock_irqrestore(&priv->lock, flags);
1334
1335 out:
1336 return budget - quota;
1337 }
1338
ravb_set_duplex_gbeth(struct net_device * ndev)1339 static void ravb_set_duplex_gbeth(struct net_device *ndev)
1340 {
1341 struct ravb_private *priv = netdev_priv(ndev);
1342
1343 ravb_modify(ndev, ECMR, ECMR_DM, priv->duplex > 0 ? ECMR_DM : 0);
1344 }
1345
1346 /* PHY state control function */
ravb_adjust_link(struct net_device * ndev)1347 static void ravb_adjust_link(struct net_device *ndev)
1348 {
1349 struct ravb_private *priv = netdev_priv(ndev);
1350 const struct ravb_hw_info *info = priv->info;
1351 struct phy_device *phydev = ndev->phydev;
1352 bool new_state = false;
1353 unsigned long flags;
1354
1355 spin_lock_irqsave(&priv->lock, flags);
1356
1357 /* Disable TX and RX right over here, if E-MAC change is ignored */
1358 if (priv->no_avb_link)
1359 ravb_rcv_snd_disable(ndev);
1360
1361 if (phydev->link) {
1362 if (info->half_duplex && phydev->duplex != priv->duplex) {
1363 new_state = true;
1364 priv->duplex = phydev->duplex;
1365 ravb_set_duplex_gbeth(ndev);
1366 }
1367
1368 if (phydev->speed != priv->speed) {
1369 new_state = true;
1370 priv->speed = phydev->speed;
1371 info->set_rate(ndev);
1372 }
1373 if (!priv->link) {
1374 ravb_modify(ndev, ECMR, ECMR_TXF, 0);
1375 new_state = true;
1376 priv->link = phydev->link;
1377 }
1378 } else if (priv->link) {
1379 new_state = true;
1380 priv->link = 0;
1381 priv->speed = 0;
1382 if (info->half_duplex)
1383 priv->duplex = -1;
1384 }
1385
1386 /* Enable TX and RX right over here, if E-MAC change is ignored */
1387 if (priv->no_avb_link && phydev->link)
1388 ravb_rcv_snd_enable(ndev);
1389
1390 spin_unlock_irqrestore(&priv->lock, flags);
1391
1392 if (new_state && netif_msg_link(priv))
1393 phy_print_status(phydev);
1394 }
1395
1396 /* PHY init function */
ravb_phy_init(struct net_device * ndev)1397 static int ravb_phy_init(struct net_device *ndev)
1398 {
1399 struct device_node *np = ndev->dev.parent->of_node;
1400 struct ravb_private *priv = netdev_priv(ndev);
1401 const struct ravb_hw_info *info = priv->info;
1402 struct phy_device *phydev;
1403 struct device_node *pn;
1404 phy_interface_t iface;
1405 int err;
1406
1407 priv->link = 0;
1408 priv->speed = 0;
1409 priv->duplex = -1;
1410
1411 /* Try connecting to PHY */
1412 pn = of_parse_phandle(np, "phy-handle", 0);
1413 if (!pn) {
1414 /* In the case of a fixed PHY, the DT node associated
1415 * to the PHY is the Ethernet MAC DT node.
1416 */
1417 if (of_phy_is_fixed_link(np)) {
1418 err = of_phy_register_fixed_link(np);
1419 if (err)
1420 return err;
1421 }
1422 pn = of_node_get(np);
1423 }
1424
1425 iface = priv->rgmii_override ? PHY_INTERFACE_MODE_RGMII
1426 : priv->phy_interface;
1427 phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, iface);
1428 of_node_put(pn);
1429 if (!phydev) {
1430 netdev_err(ndev, "failed to connect PHY\n");
1431 err = -ENOENT;
1432 goto err_deregister_fixed_link;
1433 }
1434
1435 if (!info->half_duplex) {
1436 /* 10BASE, Pause and Asym Pause is not supported */
1437 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Half_BIT);
1438 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_10baseT_Full_BIT);
1439 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Pause_BIT);
1440 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_Asym_Pause_BIT);
1441
1442 /* Half Duplex is not supported */
1443 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
1444 phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_100baseT_Half_BIT);
1445 }
1446
1447 phy_attached_info(phydev);
1448
1449 return 0;
1450
1451 err_deregister_fixed_link:
1452 if (of_phy_is_fixed_link(np))
1453 of_phy_deregister_fixed_link(np);
1454
1455 return err;
1456 }
1457
1458 /* PHY control start function */
ravb_phy_start(struct net_device * ndev)1459 static int ravb_phy_start(struct net_device *ndev)
1460 {
1461 int error;
1462
1463 error = ravb_phy_init(ndev);
1464 if (error)
1465 return error;
1466
1467 phy_start(ndev->phydev);
1468
1469 return 0;
1470 }
1471
ravb_get_msglevel(struct net_device * ndev)1472 static u32 ravb_get_msglevel(struct net_device *ndev)
1473 {
1474 struct ravb_private *priv = netdev_priv(ndev);
1475
1476 return priv->msg_enable;
1477 }
1478
ravb_set_msglevel(struct net_device * ndev,u32 value)1479 static void ravb_set_msglevel(struct net_device *ndev, u32 value)
1480 {
1481 struct ravb_private *priv = netdev_priv(ndev);
1482
1483 priv->msg_enable = value;
1484 }
1485
1486 static const char ravb_gstrings_stats_gbeth[][ETH_GSTRING_LEN] = {
1487 "rx_queue_0_current",
1488 "tx_queue_0_current",
1489 "rx_queue_0_dirty",
1490 "tx_queue_0_dirty",
1491 "rx_queue_0_packets",
1492 "tx_queue_0_packets",
1493 "rx_queue_0_bytes",
1494 "tx_queue_0_bytes",
1495 "rx_queue_0_mcast_packets",
1496 "rx_queue_0_errors",
1497 "rx_queue_0_crc_errors",
1498 "rx_queue_0_frame_errors",
1499 "rx_queue_0_length_errors",
1500 "rx_queue_0_csum_offload_errors",
1501 "rx_queue_0_over_errors",
1502 };
1503
1504 static const char ravb_gstrings_stats[][ETH_GSTRING_LEN] = {
1505 "rx_queue_0_current",
1506 "tx_queue_0_current",
1507 "rx_queue_0_dirty",
1508 "tx_queue_0_dirty",
1509 "rx_queue_0_packets",
1510 "tx_queue_0_packets",
1511 "rx_queue_0_bytes",
1512 "tx_queue_0_bytes",
1513 "rx_queue_0_mcast_packets",
1514 "rx_queue_0_errors",
1515 "rx_queue_0_crc_errors",
1516 "rx_queue_0_frame_errors",
1517 "rx_queue_0_length_errors",
1518 "rx_queue_0_missed_errors",
1519 "rx_queue_0_over_errors",
1520
1521 "rx_queue_1_current",
1522 "tx_queue_1_current",
1523 "rx_queue_1_dirty",
1524 "tx_queue_1_dirty",
1525 "rx_queue_1_packets",
1526 "tx_queue_1_packets",
1527 "rx_queue_1_bytes",
1528 "tx_queue_1_bytes",
1529 "rx_queue_1_mcast_packets",
1530 "rx_queue_1_errors",
1531 "rx_queue_1_crc_errors",
1532 "rx_queue_1_frame_errors",
1533 "rx_queue_1_length_errors",
1534 "rx_queue_1_missed_errors",
1535 "rx_queue_1_over_errors",
1536 };
1537
ravb_get_sset_count(struct net_device * netdev,int sset)1538 static int ravb_get_sset_count(struct net_device *netdev, int sset)
1539 {
1540 struct ravb_private *priv = netdev_priv(netdev);
1541 const struct ravb_hw_info *info = priv->info;
1542
1543 switch (sset) {
1544 case ETH_SS_STATS:
1545 return info->stats_len;
1546 default:
1547 return -EOPNOTSUPP;
1548 }
1549 }
1550
ravb_get_ethtool_stats(struct net_device * ndev,struct ethtool_stats * estats,u64 * data)1551 static void ravb_get_ethtool_stats(struct net_device *ndev,
1552 struct ethtool_stats *estats, u64 *data)
1553 {
1554 struct ravb_private *priv = netdev_priv(ndev);
1555 const struct ravb_hw_info *info = priv->info;
1556 int num_rx_q;
1557 int i = 0;
1558 int q;
1559
1560 num_rx_q = info->nc_queues ? NUM_RX_QUEUE : 1;
1561 /* Device-specific stats */
1562 for (q = RAVB_BE; q < num_rx_q; q++) {
1563 struct net_device_stats *stats = &priv->stats[q];
1564
1565 data[i++] = priv->cur_rx[q];
1566 data[i++] = priv->cur_tx[q];
1567 data[i++] = priv->dirty_rx[q];
1568 data[i++] = priv->dirty_tx[q];
1569 data[i++] = stats->rx_packets;
1570 data[i++] = stats->tx_packets;
1571 data[i++] = stats->rx_bytes;
1572 data[i++] = stats->tx_bytes;
1573 data[i++] = stats->multicast;
1574 data[i++] = stats->rx_errors;
1575 data[i++] = stats->rx_crc_errors;
1576 data[i++] = stats->rx_frame_errors;
1577 data[i++] = stats->rx_length_errors;
1578 data[i++] = stats->rx_missed_errors;
1579 data[i++] = stats->rx_over_errors;
1580 }
1581 }
1582
ravb_get_strings(struct net_device * ndev,u32 stringset,u8 * data)1583 static void ravb_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
1584 {
1585 struct ravb_private *priv = netdev_priv(ndev);
1586 const struct ravb_hw_info *info = priv->info;
1587
1588 switch (stringset) {
1589 case ETH_SS_STATS:
1590 memcpy(data, info->gstrings_stats, info->gstrings_size);
1591 break;
1592 }
1593 }
1594
ravb_get_ringparam(struct net_device * ndev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)1595 static void ravb_get_ringparam(struct net_device *ndev,
1596 struct ethtool_ringparam *ring,
1597 struct kernel_ethtool_ringparam *kernel_ring,
1598 struct netlink_ext_ack *extack)
1599 {
1600 struct ravb_private *priv = netdev_priv(ndev);
1601
1602 ring->rx_max_pending = BE_RX_RING_MAX;
1603 ring->tx_max_pending = BE_TX_RING_MAX;
1604 ring->rx_pending = priv->num_rx_ring[RAVB_BE];
1605 ring->tx_pending = priv->num_tx_ring[RAVB_BE];
1606 }
1607
ravb_set_ringparam(struct net_device * ndev,struct ethtool_ringparam * ring,struct kernel_ethtool_ringparam * kernel_ring,struct netlink_ext_ack * extack)1608 static int ravb_set_ringparam(struct net_device *ndev,
1609 struct ethtool_ringparam *ring,
1610 struct kernel_ethtool_ringparam *kernel_ring,
1611 struct netlink_ext_ack *extack)
1612 {
1613 struct ravb_private *priv = netdev_priv(ndev);
1614 const struct ravb_hw_info *info = priv->info;
1615 int error;
1616
1617 if (ring->tx_pending > BE_TX_RING_MAX ||
1618 ring->rx_pending > BE_RX_RING_MAX ||
1619 ring->tx_pending < BE_TX_RING_MIN ||
1620 ring->rx_pending < BE_RX_RING_MIN)
1621 return -EINVAL;
1622 if (ring->rx_mini_pending || ring->rx_jumbo_pending)
1623 return -EINVAL;
1624
1625 if (netif_running(ndev)) {
1626 netif_device_detach(ndev);
1627 /* Stop PTP Clock driver */
1628 if (info->gptp)
1629 ravb_ptp_stop(ndev);
1630 /* Wait for DMA stopping */
1631 error = ravb_stop_dma(ndev);
1632 if (error) {
1633 netdev_err(ndev,
1634 "cannot set ringparam! Any AVB processes are still running?\n");
1635 return error;
1636 }
1637 synchronize_irq(ndev->irq);
1638
1639 /* Free all the skb's in the RX queue and the DMA buffers. */
1640 ravb_ring_free(ndev, RAVB_BE);
1641 if (info->nc_queues)
1642 ravb_ring_free(ndev, RAVB_NC);
1643 }
1644
1645 /* Set new parameters */
1646 priv->num_rx_ring[RAVB_BE] = ring->rx_pending;
1647 priv->num_tx_ring[RAVB_BE] = ring->tx_pending;
1648
1649 if (netif_running(ndev)) {
1650 error = ravb_dmac_init(ndev);
1651 if (error) {
1652 netdev_err(ndev,
1653 "%s: ravb_dmac_init() failed, error %d\n",
1654 __func__, error);
1655 return error;
1656 }
1657
1658 ravb_emac_init(ndev);
1659
1660 /* Initialise PTP Clock driver */
1661 if (info->gptp)
1662 ravb_ptp_init(ndev, priv->pdev);
1663
1664 netif_device_attach(ndev);
1665 }
1666
1667 return 0;
1668 }
1669
ravb_get_ts_info(struct net_device * ndev,struct ethtool_ts_info * info)1670 static int ravb_get_ts_info(struct net_device *ndev,
1671 struct ethtool_ts_info *info)
1672 {
1673 struct ravb_private *priv = netdev_priv(ndev);
1674 const struct ravb_hw_info *hw_info = priv->info;
1675
1676 info->so_timestamping =
1677 SOF_TIMESTAMPING_TX_SOFTWARE |
1678 SOF_TIMESTAMPING_RX_SOFTWARE |
1679 SOF_TIMESTAMPING_SOFTWARE |
1680 SOF_TIMESTAMPING_TX_HARDWARE |
1681 SOF_TIMESTAMPING_RX_HARDWARE |
1682 SOF_TIMESTAMPING_RAW_HARDWARE;
1683 info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
1684 info->rx_filters =
1685 (1 << HWTSTAMP_FILTER_NONE) |
1686 (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
1687 (1 << HWTSTAMP_FILTER_ALL);
1688 if (hw_info->gptp || hw_info->ccc_gac)
1689 info->phc_index = ptp_clock_index(priv->ptp.clock);
1690
1691 return 0;
1692 }
1693
ravb_get_wol(struct net_device * ndev,struct ethtool_wolinfo * wol)1694 static void ravb_get_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1695 {
1696 struct ravb_private *priv = netdev_priv(ndev);
1697
1698 wol->supported = WAKE_MAGIC;
1699 wol->wolopts = priv->wol_enabled ? WAKE_MAGIC : 0;
1700 }
1701
ravb_set_wol(struct net_device * ndev,struct ethtool_wolinfo * wol)1702 static int ravb_set_wol(struct net_device *ndev, struct ethtool_wolinfo *wol)
1703 {
1704 struct ravb_private *priv = netdev_priv(ndev);
1705 const struct ravb_hw_info *info = priv->info;
1706
1707 if (!info->magic_pkt || (wol->wolopts & ~WAKE_MAGIC))
1708 return -EOPNOTSUPP;
1709
1710 priv->wol_enabled = !!(wol->wolopts & WAKE_MAGIC);
1711
1712 device_set_wakeup_enable(&priv->pdev->dev, priv->wol_enabled);
1713
1714 return 0;
1715 }
1716
1717 static const struct ethtool_ops ravb_ethtool_ops = {
1718 .nway_reset = phy_ethtool_nway_reset,
1719 .get_msglevel = ravb_get_msglevel,
1720 .set_msglevel = ravb_set_msglevel,
1721 .get_link = ethtool_op_get_link,
1722 .get_strings = ravb_get_strings,
1723 .get_ethtool_stats = ravb_get_ethtool_stats,
1724 .get_sset_count = ravb_get_sset_count,
1725 .get_ringparam = ravb_get_ringparam,
1726 .set_ringparam = ravb_set_ringparam,
1727 .get_ts_info = ravb_get_ts_info,
1728 .get_link_ksettings = phy_ethtool_get_link_ksettings,
1729 .set_link_ksettings = phy_ethtool_set_link_ksettings,
1730 .get_wol = ravb_get_wol,
1731 .set_wol = ravb_set_wol,
1732 };
1733
ravb_hook_irq(unsigned int irq,irq_handler_t handler,struct net_device * ndev,struct device * dev,const char * ch)1734 static inline int ravb_hook_irq(unsigned int irq, irq_handler_t handler,
1735 struct net_device *ndev, struct device *dev,
1736 const char *ch)
1737 {
1738 char *name;
1739 int error;
1740
1741 name = devm_kasprintf(dev, GFP_KERNEL, "%s:%s", ndev->name, ch);
1742 if (!name)
1743 return -ENOMEM;
1744 error = request_irq(irq, handler, 0, name, ndev);
1745 if (error)
1746 netdev_err(ndev, "cannot request IRQ %s\n", name);
1747
1748 return error;
1749 }
1750
1751 /* Network device open function for Ethernet AVB */
ravb_open(struct net_device * ndev)1752 static int ravb_open(struct net_device *ndev)
1753 {
1754 struct ravb_private *priv = netdev_priv(ndev);
1755 const struct ravb_hw_info *info = priv->info;
1756 struct platform_device *pdev = priv->pdev;
1757 struct device *dev = &pdev->dev;
1758 int error;
1759
1760 napi_enable(&priv->napi[RAVB_BE]);
1761 if (info->nc_queues)
1762 napi_enable(&priv->napi[RAVB_NC]);
1763
1764 if (!info->multi_irqs) {
1765 error = request_irq(ndev->irq, ravb_interrupt, IRQF_SHARED,
1766 ndev->name, ndev);
1767 if (error) {
1768 netdev_err(ndev, "cannot request IRQ\n");
1769 goto out_napi_off;
1770 }
1771 } else {
1772 error = ravb_hook_irq(ndev->irq, ravb_multi_interrupt, ndev,
1773 dev, "ch22:multi");
1774 if (error)
1775 goto out_napi_off;
1776 error = ravb_hook_irq(priv->emac_irq, ravb_emac_interrupt, ndev,
1777 dev, "ch24:emac");
1778 if (error)
1779 goto out_free_irq;
1780 error = ravb_hook_irq(priv->rx_irqs[RAVB_BE], ravb_be_interrupt,
1781 ndev, dev, "ch0:rx_be");
1782 if (error)
1783 goto out_free_irq_emac;
1784 error = ravb_hook_irq(priv->tx_irqs[RAVB_BE], ravb_be_interrupt,
1785 ndev, dev, "ch18:tx_be");
1786 if (error)
1787 goto out_free_irq_be_rx;
1788 error = ravb_hook_irq(priv->rx_irqs[RAVB_NC], ravb_nc_interrupt,
1789 ndev, dev, "ch1:rx_nc");
1790 if (error)
1791 goto out_free_irq_be_tx;
1792 error = ravb_hook_irq(priv->tx_irqs[RAVB_NC], ravb_nc_interrupt,
1793 ndev, dev, "ch19:tx_nc");
1794 if (error)
1795 goto out_free_irq_nc_rx;
1796
1797 if (info->err_mgmt_irqs) {
1798 error = ravb_hook_irq(priv->erra_irq, ravb_multi_interrupt,
1799 ndev, dev, "err_a");
1800 if (error)
1801 goto out_free_irq_nc_tx;
1802 error = ravb_hook_irq(priv->mgmta_irq, ravb_multi_interrupt,
1803 ndev, dev, "mgmt_a");
1804 if (error)
1805 goto out_free_irq_erra;
1806 }
1807 }
1808
1809 /* Device init */
1810 error = ravb_dmac_init(ndev);
1811 if (error)
1812 goto out_free_irq_mgmta;
1813 ravb_emac_init(ndev);
1814
1815 /* Initialise PTP Clock driver */
1816 if (info->gptp)
1817 ravb_ptp_init(ndev, priv->pdev);
1818
1819 /* PHY control start */
1820 error = ravb_phy_start(ndev);
1821 if (error)
1822 goto out_ptp_stop;
1823
1824 netif_tx_start_all_queues(ndev);
1825
1826 return 0;
1827
1828 out_ptp_stop:
1829 /* Stop PTP Clock driver */
1830 if (info->gptp)
1831 ravb_ptp_stop(ndev);
1832 ravb_stop_dma(ndev);
1833 out_free_irq_mgmta:
1834 if (!info->multi_irqs)
1835 goto out_free_irq;
1836 if (info->err_mgmt_irqs)
1837 free_irq(priv->mgmta_irq, ndev);
1838 out_free_irq_erra:
1839 if (info->err_mgmt_irqs)
1840 free_irq(priv->erra_irq, ndev);
1841 out_free_irq_nc_tx:
1842 free_irq(priv->tx_irqs[RAVB_NC], ndev);
1843 out_free_irq_nc_rx:
1844 free_irq(priv->rx_irqs[RAVB_NC], ndev);
1845 out_free_irq_be_tx:
1846 free_irq(priv->tx_irqs[RAVB_BE], ndev);
1847 out_free_irq_be_rx:
1848 free_irq(priv->rx_irqs[RAVB_BE], ndev);
1849 out_free_irq_emac:
1850 free_irq(priv->emac_irq, ndev);
1851 out_free_irq:
1852 free_irq(ndev->irq, ndev);
1853 out_napi_off:
1854 if (info->nc_queues)
1855 napi_disable(&priv->napi[RAVB_NC]);
1856 napi_disable(&priv->napi[RAVB_BE]);
1857 return error;
1858 }
1859
1860 /* Timeout function for Ethernet AVB */
ravb_tx_timeout(struct net_device * ndev,unsigned int txqueue)1861 static void ravb_tx_timeout(struct net_device *ndev, unsigned int txqueue)
1862 {
1863 struct ravb_private *priv = netdev_priv(ndev);
1864
1865 netif_err(priv, tx_err, ndev,
1866 "transmit timed out, status %08x, resetting...\n",
1867 ravb_read(ndev, ISS));
1868
1869 /* tx_errors count up */
1870 ndev->stats.tx_errors++;
1871
1872 schedule_work(&priv->work);
1873 }
1874
ravb_tx_timeout_work(struct work_struct * work)1875 static void ravb_tx_timeout_work(struct work_struct *work)
1876 {
1877 struct ravb_private *priv = container_of(work, struct ravb_private,
1878 work);
1879 const struct ravb_hw_info *info = priv->info;
1880 struct net_device *ndev = priv->ndev;
1881 int error;
1882
1883 if (!rtnl_trylock()) {
1884 usleep_range(1000, 2000);
1885 schedule_work(&priv->work);
1886 return;
1887 }
1888
1889 netif_tx_stop_all_queues(ndev);
1890
1891 /* Stop PTP Clock driver */
1892 if (info->gptp)
1893 ravb_ptp_stop(ndev);
1894
1895 /* Wait for DMA stopping */
1896 if (ravb_stop_dma(ndev)) {
1897 /* If ravb_stop_dma() fails, the hardware is still operating
1898 * for TX and/or RX. So, this should not call the following
1899 * functions because ravb_dmac_init() is possible to fail too.
1900 * Also, this should not retry ravb_stop_dma() again and again
1901 * here because it's possible to wait forever. So, this just
1902 * re-enables the TX and RX and skip the following
1903 * re-initialization procedure.
1904 */
1905 ravb_rcv_snd_enable(ndev);
1906 goto out;
1907 }
1908
1909 ravb_ring_free(ndev, RAVB_BE);
1910 if (info->nc_queues)
1911 ravb_ring_free(ndev, RAVB_NC);
1912
1913 /* Device init */
1914 error = ravb_dmac_init(ndev);
1915 if (error) {
1916 /* If ravb_dmac_init() fails, descriptors are freed. So, this
1917 * should return here to avoid re-enabling the TX and RX in
1918 * ravb_emac_init().
1919 */
1920 netdev_err(ndev, "%s: ravb_dmac_init() failed, error %d\n",
1921 __func__, error);
1922 goto out_unlock;
1923 }
1924 ravb_emac_init(ndev);
1925
1926 out:
1927 /* Initialise PTP Clock driver */
1928 if (info->gptp)
1929 ravb_ptp_init(ndev, priv->pdev);
1930
1931 netif_tx_start_all_queues(ndev);
1932
1933 out_unlock:
1934 rtnl_unlock();
1935 }
1936
1937 /* Packet transmit function for Ethernet AVB */
ravb_start_xmit(struct sk_buff * skb,struct net_device * ndev)1938 static netdev_tx_t ravb_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1939 {
1940 struct ravb_private *priv = netdev_priv(ndev);
1941 const struct ravb_hw_info *info = priv->info;
1942 unsigned int num_tx_desc = priv->num_tx_desc;
1943 u16 q = skb_get_queue_mapping(skb);
1944 struct ravb_tstamp_skb *ts_skb;
1945 struct ravb_tx_desc *desc;
1946 unsigned long flags;
1947 dma_addr_t dma_addr;
1948 void *buffer;
1949 u32 entry;
1950 u32 len;
1951
1952 spin_lock_irqsave(&priv->lock, flags);
1953 if (priv->cur_tx[q] - priv->dirty_tx[q] > (priv->num_tx_ring[q] - 1) *
1954 num_tx_desc) {
1955 netif_err(priv, tx_queued, ndev,
1956 "still transmitting with the full ring!\n");
1957 netif_stop_subqueue(ndev, q);
1958 spin_unlock_irqrestore(&priv->lock, flags);
1959 return NETDEV_TX_BUSY;
1960 }
1961
1962 if (skb_put_padto(skb, ETH_ZLEN))
1963 goto exit;
1964
1965 entry = priv->cur_tx[q] % (priv->num_tx_ring[q] * num_tx_desc);
1966 priv->tx_skb[q][entry / num_tx_desc] = skb;
1967
1968 if (num_tx_desc > 1) {
1969 buffer = PTR_ALIGN(priv->tx_align[q], DPTR_ALIGN) +
1970 entry / num_tx_desc * DPTR_ALIGN;
1971 len = PTR_ALIGN(skb->data, DPTR_ALIGN) - skb->data;
1972
1973 /* Zero length DMA descriptors are problematic as they seem
1974 * to terminate DMA transfers. Avoid them by simply using a
1975 * length of DPTR_ALIGN (4) when skb data is aligned to
1976 * DPTR_ALIGN.
1977 *
1978 * As skb is guaranteed to have at least ETH_ZLEN (60)
1979 * bytes of data by the call to skb_put_padto() above this
1980 * is safe with respect to both the length of the first DMA
1981 * descriptor (len) overflowing the available data and the
1982 * length of the second DMA descriptor (skb->len - len)
1983 * being negative.
1984 */
1985 if (len == 0)
1986 len = DPTR_ALIGN;
1987
1988 memcpy(buffer, skb->data, len);
1989 dma_addr = dma_map_single(ndev->dev.parent, buffer, len,
1990 DMA_TO_DEVICE);
1991 if (dma_mapping_error(ndev->dev.parent, dma_addr))
1992 goto drop;
1993
1994 desc = &priv->tx_ring[q][entry];
1995 desc->ds_tagl = cpu_to_le16(len);
1996 desc->dptr = cpu_to_le32(dma_addr);
1997
1998 buffer = skb->data + len;
1999 len = skb->len - len;
2000 dma_addr = dma_map_single(ndev->dev.parent, buffer, len,
2001 DMA_TO_DEVICE);
2002 if (dma_mapping_error(ndev->dev.parent, dma_addr))
2003 goto unmap;
2004
2005 desc++;
2006 } else {
2007 desc = &priv->tx_ring[q][entry];
2008 len = skb->len;
2009 dma_addr = dma_map_single(ndev->dev.parent, skb->data, skb->len,
2010 DMA_TO_DEVICE);
2011 if (dma_mapping_error(ndev->dev.parent, dma_addr))
2012 goto drop;
2013 }
2014 desc->ds_tagl = cpu_to_le16(len);
2015 desc->dptr = cpu_to_le32(dma_addr);
2016
2017 /* TX timestamp required */
2018 if (info->gptp || info->ccc_gac) {
2019 if (q == RAVB_NC) {
2020 ts_skb = kmalloc(sizeof(*ts_skb), GFP_ATOMIC);
2021 if (!ts_skb) {
2022 if (num_tx_desc > 1) {
2023 desc--;
2024 dma_unmap_single(ndev->dev.parent, dma_addr,
2025 len, DMA_TO_DEVICE);
2026 }
2027 goto unmap;
2028 }
2029 ts_skb->skb = skb_get(skb);
2030 ts_skb->tag = priv->ts_skb_tag++;
2031 priv->ts_skb_tag &= 0x3ff;
2032 list_add_tail(&ts_skb->list, &priv->ts_skb_list);
2033
2034 /* TAG and timestamp required flag */
2035 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2036 desc->tagh_tsr = (ts_skb->tag >> 4) | TX_TSR;
2037 desc->ds_tagl |= cpu_to_le16(ts_skb->tag << 12);
2038 }
2039
2040 skb_tx_timestamp(skb);
2041 }
2042 /* Descriptor type must be set after all the above writes */
2043 dma_wmb();
2044 if (num_tx_desc > 1) {
2045 desc->die_dt = DT_FEND;
2046 desc--;
2047 desc->die_dt = DT_FSTART;
2048 } else {
2049 desc->die_dt = DT_FSINGLE;
2050 }
2051 ravb_modify(ndev, TCCR, TCCR_TSRQ0 << q, TCCR_TSRQ0 << q);
2052
2053 priv->cur_tx[q] += num_tx_desc;
2054 if (priv->cur_tx[q] - priv->dirty_tx[q] >
2055 (priv->num_tx_ring[q] - 1) * num_tx_desc &&
2056 !ravb_tx_free(ndev, q, true))
2057 netif_stop_subqueue(ndev, q);
2058
2059 exit:
2060 spin_unlock_irqrestore(&priv->lock, flags);
2061 return NETDEV_TX_OK;
2062
2063 unmap:
2064 dma_unmap_single(ndev->dev.parent, le32_to_cpu(desc->dptr),
2065 le16_to_cpu(desc->ds_tagl), DMA_TO_DEVICE);
2066 drop:
2067 dev_kfree_skb_any(skb);
2068 priv->tx_skb[q][entry / num_tx_desc] = NULL;
2069 goto exit;
2070 }
2071
ravb_select_queue(struct net_device * ndev,struct sk_buff * skb,struct net_device * sb_dev)2072 static u16 ravb_select_queue(struct net_device *ndev, struct sk_buff *skb,
2073 struct net_device *sb_dev)
2074 {
2075 /* If skb needs TX timestamp, it is handled in network control queue */
2076 return (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) ? RAVB_NC :
2077 RAVB_BE;
2078
2079 }
2080
ravb_get_stats(struct net_device * ndev)2081 static struct net_device_stats *ravb_get_stats(struct net_device *ndev)
2082 {
2083 struct ravb_private *priv = netdev_priv(ndev);
2084 const struct ravb_hw_info *info = priv->info;
2085 struct net_device_stats *nstats, *stats0, *stats1;
2086
2087 nstats = &ndev->stats;
2088 stats0 = &priv->stats[RAVB_BE];
2089
2090 if (info->tx_counters) {
2091 nstats->tx_dropped += ravb_read(ndev, TROCR);
2092 ravb_write(ndev, 0, TROCR); /* (write clear) */
2093 }
2094
2095 if (info->carrier_counters) {
2096 nstats->collisions += ravb_read(ndev, CXR41);
2097 ravb_write(ndev, 0, CXR41); /* (write clear) */
2098 nstats->tx_carrier_errors += ravb_read(ndev, CXR42);
2099 ravb_write(ndev, 0, CXR42); /* (write clear) */
2100 }
2101
2102 nstats->rx_packets = stats0->rx_packets;
2103 nstats->tx_packets = stats0->tx_packets;
2104 nstats->rx_bytes = stats0->rx_bytes;
2105 nstats->tx_bytes = stats0->tx_bytes;
2106 nstats->multicast = stats0->multicast;
2107 nstats->rx_errors = stats0->rx_errors;
2108 nstats->rx_crc_errors = stats0->rx_crc_errors;
2109 nstats->rx_frame_errors = stats0->rx_frame_errors;
2110 nstats->rx_length_errors = stats0->rx_length_errors;
2111 nstats->rx_missed_errors = stats0->rx_missed_errors;
2112 nstats->rx_over_errors = stats0->rx_over_errors;
2113 if (info->nc_queues) {
2114 stats1 = &priv->stats[RAVB_NC];
2115
2116 nstats->rx_packets += stats1->rx_packets;
2117 nstats->tx_packets += stats1->tx_packets;
2118 nstats->rx_bytes += stats1->rx_bytes;
2119 nstats->tx_bytes += stats1->tx_bytes;
2120 nstats->multicast += stats1->multicast;
2121 nstats->rx_errors += stats1->rx_errors;
2122 nstats->rx_crc_errors += stats1->rx_crc_errors;
2123 nstats->rx_frame_errors += stats1->rx_frame_errors;
2124 nstats->rx_length_errors += stats1->rx_length_errors;
2125 nstats->rx_missed_errors += stats1->rx_missed_errors;
2126 nstats->rx_over_errors += stats1->rx_over_errors;
2127 }
2128
2129 return nstats;
2130 }
2131
2132 /* Update promiscuous bit */
ravb_set_rx_mode(struct net_device * ndev)2133 static void ravb_set_rx_mode(struct net_device *ndev)
2134 {
2135 struct ravb_private *priv = netdev_priv(ndev);
2136 unsigned long flags;
2137
2138 spin_lock_irqsave(&priv->lock, flags);
2139 ravb_modify(ndev, ECMR, ECMR_PRM,
2140 ndev->flags & IFF_PROMISC ? ECMR_PRM : 0);
2141 spin_unlock_irqrestore(&priv->lock, flags);
2142 }
2143
2144 /* Device close function for Ethernet AVB */
ravb_close(struct net_device * ndev)2145 static int ravb_close(struct net_device *ndev)
2146 {
2147 struct device_node *np = ndev->dev.parent->of_node;
2148 struct ravb_private *priv = netdev_priv(ndev);
2149 const struct ravb_hw_info *info = priv->info;
2150 struct ravb_tstamp_skb *ts_skb, *ts_skb2;
2151
2152 netif_tx_stop_all_queues(ndev);
2153
2154 /* Disable interrupts by clearing the interrupt masks. */
2155 ravb_write(ndev, 0, RIC0);
2156 ravb_write(ndev, 0, RIC2);
2157 ravb_write(ndev, 0, TIC);
2158
2159 /* Stop PTP Clock driver */
2160 if (info->gptp)
2161 ravb_ptp_stop(ndev);
2162
2163 /* Set the config mode to stop the AVB-DMAC's processes */
2164 if (ravb_stop_dma(ndev) < 0)
2165 netdev_err(ndev,
2166 "device will be stopped after h/w processes are done.\n");
2167
2168 /* Clear the timestamp list */
2169 if (info->gptp || info->ccc_gac) {
2170 list_for_each_entry_safe(ts_skb, ts_skb2, &priv->ts_skb_list, list) {
2171 list_del(&ts_skb->list);
2172 kfree_skb(ts_skb->skb);
2173 kfree(ts_skb);
2174 }
2175 }
2176
2177 /* PHY disconnect */
2178 if (ndev->phydev) {
2179 phy_stop(ndev->phydev);
2180 phy_disconnect(ndev->phydev);
2181 if (of_phy_is_fixed_link(np))
2182 of_phy_deregister_fixed_link(np);
2183 }
2184
2185 cancel_work_sync(&priv->work);
2186
2187 if (info->multi_irqs) {
2188 free_irq(priv->tx_irqs[RAVB_NC], ndev);
2189 free_irq(priv->rx_irqs[RAVB_NC], ndev);
2190 free_irq(priv->tx_irqs[RAVB_BE], ndev);
2191 free_irq(priv->rx_irqs[RAVB_BE], ndev);
2192 free_irq(priv->emac_irq, ndev);
2193 if (info->err_mgmt_irqs) {
2194 free_irq(priv->erra_irq, ndev);
2195 free_irq(priv->mgmta_irq, ndev);
2196 }
2197 }
2198 free_irq(ndev->irq, ndev);
2199
2200 if (info->nc_queues)
2201 napi_disable(&priv->napi[RAVB_NC]);
2202 napi_disable(&priv->napi[RAVB_BE]);
2203
2204 /* Free all the skb's in the RX queue and the DMA buffers. */
2205 ravb_ring_free(ndev, RAVB_BE);
2206 if (info->nc_queues)
2207 ravb_ring_free(ndev, RAVB_NC);
2208
2209 return 0;
2210 }
2211
ravb_hwtstamp_get(struct net_device * ndev,struct ifreq * req)2212 static int ravb_hwtstamp_get(struct net_device *ndev, struct ifreq *req)
2213 {
2214 struct ravb_private *priv = netdev_priv(ndev);
2215 struct hwtstamp_config config;
2216
2217 config.flags = 0;
2218 config.tx_type = priv->tstamp_tx_ctrl ? HWTSTAMP_TX_ON :
2219 HWTSTAMP_TX_OFF;
2220 switch (priv->tstamp_rx_ctrl & RAVB_RXTSTAMP_TYPE) {
2221 case RAVB_RXTSTAMP_TYPE_V2_L2_EVENT:
2222 config.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
2223 break;
2224 case RAVB_RXTSTAMP_TYPE_ALL:
2225 config.rx_filter = HWTSTAMP_FILTER_ALL;
2226 break;
2227 default:
2228 config.rx_filter = HWTSTAMP_FILTER_NONE;
2229 }
2230
2231 return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
2232 -EFAULT : 0;
2233 }
2234
2235 /* Control hardware time stamping */
ravb_hwtstamp_set(struct net_device * ndev,struct ifreq * req)2236 static int ravb_hwtstamp_set(struct net_device *ndev, struct ifreq *req)
2237 {
2238 struct ravb_private *priv = netdev_priv(ndev);
2239 struct hwtstamp_config config;
2240 u32 tstamp_rx_ctrl = RAVB_RXTSTAMP_ENABLED;
2241 u32 tstamp_tx_ctrl;
2242
2243 if (copy_from_user(&config, req->ifr_data, sizeof(config)))
2244 return -EFAULT;
2245
2246 switch (config.tx_type) {
2247 case HWTSTAMP_TX_OFF:
2248 tstamp_tx_ctrl = 0;
2249 break;
2250 case HWTSTAMP_TX_ON:
2251 tstamp_tx_ctrl = RAVB_TXTSTAMP_ENABLED;
2252 break;
2253 default:
2254 return -ERANGE;
2255 }
2256
2257 switch (config.rx_filter) {
2258 case HWTSTAMP_FILTER_NONE:
2259 tstamp_rx_ctrl = 0;
2260 break;
2261 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
2262 tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_V2_L2_EVENT;
2263 break;
2264 default:
2265 config.rx_filter = HWTSTAMP_FILTER_ALL;
2266 tstamp_rx_ctrl |= RAVB_RXTSTAMP_TYPE_ALL;
2267 }
2268
2269 priv->tstamp_tx_ctrl = tstamp_tx_ctrl;
2270 priv->tstamp_rx_ctrl = tstamp_rx_ctrl;
2271
2272 return copy_to_user(req->ifr_data, &config, sizeof(config)) ?
2273 -EFAULT : 0;
2274 }
2275
2276 /* ioctl to device function */
ravb_do_ioctl(struct net_device * ndev,struct ifreq * req,int cmd)2277 static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
2278 {
2279 struct phy_device *phydev = ndev->phydev;
2280
2281 if (!netif_running(ndev))
2282 return -EINVAL;
2283
2284 if (!phydev)
2285 return -ENODEV;
2286
2287 switch (cmd) {
2288 case SIOCGHWTSTAMP:
2289 return ravb_hwtstamp_get(ndev, req);
2290 case SIOCSHWTSTAMP:
2291 return ravb_hwtstamp_set(ndev, req);
2292 }
2293
2294 return phy_mii_ioctl(phydev, req, cmd);
2295 }
2296
ravb_change_mtu(struct net_device * ndev,int new_mtu)2297 static int ravb_change_mtu(struct net_device *ndev, int new_mtu)
2298 {
2299 struct ravb_private *priv = netdev_priv(ndev);
2300
2301 ndev->mtu = new_mtu;
2302
2303 if (netif_running(ndev)) {
2304 synchronize_irq(priv->emac_irq);
2305 ravb_emac_init(ndev);
2306 }
2307
2308 netdev_update_features(ndev);
2309
2310 return 0;
2311 }
2312
ravb_set_rx_csum(struct net_device * ndev,bool enable)2313 static void ravb_set_rx_csum(struct net_device *ndev, bool enable)
2314 {
2315 struct ravb_private *priv = netdev_priv(ndev);
2316 unsigned long flags;
2317
2318 spin_lock_irqsave(&priv->lock, flags);
2319
2320 /* Disable TX and RX */
2321 ravb_rcv_snd_disable(ndev);
2322
2323 /* Modify RX Checksum setting */
2324 ravb_modify(ndev, ECMR, ECMR_RCSC, enable ? ECMR_RCSC : 0);
2325
2326 /* Enable TX and RX */
2327 ravb_rcv_snd_enable(ndev);
2328
2329 spin_unlock_irqrestore(&priv->lock, flags);
2330 }
2331
ravb_set_features_gbeth(struct net_device * ndev,netdev_features_t features)2332 static int ravb_set_features_gbeth(struct net_device *ndev,
2333 netdev_features_t features)
2334 {
2335 /* Place holder */
2336 return 0;
2337 }
2338
ravb_set_features_rcar(struct net_device * ndev,netdev_features_t features)2339 static int ravb_set_features_rcar(struct net_device *ndev,
2340 netdev_features_t features)
2341 {
2342 netdev_features_t changed = ndev->features ^ features;
2343
2344 if (changed & NETIF_F_RXCSUM)
2345 ravb_set_rx_csum(ndev, features & NETIF_F_RXCSUM);
2346
2347 ndev->features = features;
2348
2349 return 0;
2350 }
2351
ravb_set_features(struct net_device * ndev,netdev_features_t features)2352 static int ravb_set_features(struct net_device *ndev,
2353 netdev_features_t features)
2354 {
2355 struct ravb_private *priv = netdev_priv(ndev);
2356 const struct ravb_hw_info *info = priv->info;
2357
2358 return info->set_feature(ndev, features);
2359 }
2360
2361 static const struct net_device_ops ravb_netdev_ops = {
2362 .ndo_open = ravb_open,
2363 .ndo_stop = ravb_close,
2364 .ndo_start_xmit = ravb_start_xmit,
2365 .ndo_select_queue = ravb_select_queue,
2366 .ndo_get_stats = ravb_get_stats,
2367 .ndo_set_rx_mode = ravb_set_rx_mode,
2368 .ndo_tx_timeout = ravb_tx_timeout,
2369 .ndo_eth_ioctl = ravb_do_ioctl,
2370 .ndo_change_mtu = ravb_change_mtu,
2371 .ndo_validate_addr = eth_validate_addr,
2372 .ndo_set_mac_address = eth_mac_addr,
2373 .ndo_set_features = ravb_set_features,
2374 };
2375
2376 /* MDIO bus init function */
ravb_mdio_init(struct ravb_private * priv)2377 static int ravb_mdio_init(struct ravb_private *priv)
2378 {
2379 struct platform_device *pdev = priv->pdev;
2380 struct device *dev = &pdev->dev;
2381 struct phy_device *phydev;
2382 struct device_node *pn;
2383 int error;
2384
2385 /* Bitbang init */
2386 priv->mdiobb.ops = &bb_ops;
2387
2388 /* MII controller setting */
2389 priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb);
2390 if (!priv->mii_bus)
2391 return -ENOMEM;
2392
2393 /* Hook up MII support for ethtool */
2394 priv->mii_bus->name = "ravb_mii";
2395 priv->mii_bus->parent = dev;
2396 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
2397 pdev->name, pdev->id);
2398
2399 /* Register MDIO bus */
2400 error = of_mdiobus_register(priv->mii_bus, dev->of_node);
2401 if (error)
2402 goto out_free_bus;
2403
2404 pn = of_parse_phandle(dev->of_node, "phy-handle", 0);
2405 phydev = of_phy_find_device(pn);
2406 if (phydev) {
2407 phydev->mac_managed_pm = true;
2408 put_device(&phydev->mdio.dev);
2409 }
2410 of_node_put(pn);
2411
2412 return 0;
2413
2414 out_free_bus:
2415 free_mdio_bitbang(priv->mii_bus);
2416 return error;
2417 }
2418
2419 /* MDIO bus release function */
ravb_mdio_release(struct ravb_private * priv)2420 static int ravb_mdio_release(struct ravb_private *priv)
2421 {
2422 /* Unregister mdio bus */
2423 mdiobus_unregister(priv->mii_bus);
2424
2425 /* Free bitbang info */
2426 free_mdio_bitbang(priv->mii_bus);
2427
2428 return 0;
2429 }
2430
2431 static const struct ravb_hw_info ravb_gen3_hw_info = {
2432 .rx_ring_free = ravb_rx_ring_free_rcar,
2433 .rx_ring_format = ravb_rx_ring_format_rcar,
2434 .alloc_rx_desc = ravb_alloc_rx_desc_rcar,
2435 .receive = ravb_rx_rcar,
2436 .set_rate = ravb_set_rate_rcar,
2437 .set_feature = ravb_set_features_rcar,
2438 .dmac_init = ravb_dmac_init_rcar,
2439 .emac_init = ravb_emac_init_rcar,
2440 .gstrings_stats = ravb_gstrings_stats,
2441 .gstrings_size = sizeof(ravb_gstrings_stats),
2442 .net_hw_features = NETIF_F_RXCSUM,
2443 .net_features = NETIF_F_RXCSUM,
2444 .stats_len = ARRAY_SIZE(ravb_gstrings_stats),
2445 .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
2446 .tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
2447 .rx_max_buf_size = SZ_2K,
2448 .internal_delay = 1,
2449 .tx_counters = 1,
2450 .multi_irqs = 1,
2451 .irq_en_dis = 1,
2452 .ccc_gac = 1,
2453 .nc_queues = 1,
2454 .magic_pkt = 1,
2455 };
2456
2457 static const struct ravb_hw_info ravb_gen2_hw_info = {
2458 .rx_ring_free = ravb_rx_ring_free_rcar,
2459 .rx_ring_format = ravb_rx_ring_format_rcar,
2460 .alloc_rx_desc = ravb_alloc_rx_desc_rcar,
2461 .receive = ravb_rx_rcar,
2462 .set_rate = ravb_set_rate_rcar,
2463 .set_feature = ravb_set_features_rcar,
2464 .dmac_init = ravb_dmac_init_rcar,
2465 .emac_init = ravb_emac_init_rcar,
2466 .gstrings_stats = ravb_gstrings_stats,
2467 .gstrings_size = sizeof(ravb_gstrings_stats),
2468 .net_hw_features = NETIF_F_RXCSUM,
2469 .net_features = NETIF_F_RXCSUM,
2470 .stats_len = ARRAY_SIZE(ravb_gstrings_stats),
2471 .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
2472 .tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
2473 .rx_max_buf_size = SZ_2K,
2474 .aligned_tx = 1,
2475 .gptp = 1,
2476 .nc_queues = 1,
2477 .magic_pkt = 1,
2478 };
2479
2480 static const struct ravb_hw_info ravb_rzv2m_hw_info = {
2481 .rx_ring_free = ravb_rx_ring_free_rcar,
2482 .rx_ring_format = ravb_rx_ring_format_rcar,
2483 .alloc_rx_desc = ravb_alloc_rx_desc_rcar,
2484 .receive = ravb_rx_rcar,
2485 .set_rate = ravb_set_rate_rcar,
2486 .set_feature = ravb_set_features_rcar,
2487 .dmac_init = ravb_dmac_init_rcar,
2488 .emac_init = ravb_emac_init_rcar,
2489 .gstrings_stats = ravb_gstrings_stats,
2490 .gstrings_size = sizeof(ravb_gstrings_stats),
2491 .net_hw_features = NETIF_F_RXCSUM,
2492 .net_features = NETIF_F_RXCSUM,
2493 .stats_len = ARRAY_SIZE(ravb_gstrings_stats),
2494 .max_rx_len = RX_BUF_SZ + RAVB_ALIGN - 1,
2495 .tccr_mask = TCCR_TSRQ0 | TCCR_TSRQ1 | TCCR_TSRQ2 | TCCR_TSRQ3,
2496 .rx_max_buf_size = SZ_2K,
2497 .multi_irqs = 1,
2498 .err_mgmt_irqs = 1,
2499 .gptp = 1,
2500 .gptp_ref_clk = 1,
2501 .nc_queues = 1,
2502 .magic_pkt = 1,
2503 };
2504
2505 static const struct ravb_hw_info gbeth_hw_info = {
2506 .rx_ring_free = ravb_rx_ring_free_gbeth,
2507 .rx_ring_format = ravb_rx_ring_format_gbeth,
2508 .alloc_rx_desc = ravb_alloc_rx_desc_gbeth,
2509 .receive = ravb_rx_gbeth,
2510 .set_rate = ravb_set_rate_gbeth,
2511 .set_feature = ravb_set_features_gbeth,
2512 .dmac_init = ravb_dmac_init_gbeth,
2513 .emac_init = ravb_emac_init_gbeth,
2514 .gstrings_stats = ravb_gstrings_stats_gbeth,
2515 .gstrings_size = sizeof(ravb_gstrings_stats_gbeth),
2516 .stats_len = ARRAY_SIZE(ravb_gstrings_stats_gbeth),
2517 .max_rx_len = ALIGN(GBETH_RX_BUFF_MAX, RAVB_ALIGN),
2518 .tccr_mask = TCCR_TSRQ0,
2519 .rx_max_buf_size = SZ_8K,
2520 .aligned_tx = 1,
2521 .tx_counters = 1,
2522 .carrier_counters = 1,
2523 .half_duplex = 1,
2524 };
2525
2526 static const struct of_device_id ravb_match_table[] = {
2527 { .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
2528 { .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
2529 { .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
2530 { .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
2531 { .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
2532 { .compatible = "renesas,etheravb-rcar-gen4", .data = &ravb_gen3_hw_info },
2533 { .compatible = "renesas,etheravb-rzv2m", .data = &ravb_rzv2m_hw_info },
2534 { .compatible = "renesas,rzg2l-gbeth", .data = &gbeth_hw_info },
2535 { }
2536 };
2537 MODULE_DEVICE_TABLE(of, ravb_match_table);
2538
ravb_set_gti(struct net_device * ndev)2539 static int ravb_set_gti(struct net_device *ndev)
2540 {
2541 struct ravb_private *priv = netdev_priv(ndev);
2542 const struct ravb_hw_info *info = priv->info;
2543 struct device *dev = ndev->dev.parent;
2544 unsigned long rate;
2545 uint64_t inc;
2546
2547 if (info->gptp_ref_clk)
2548 rate = clk_get_rate(priv->gptp_clk);
2549 else
2550 rate = clk_get_rate(priv->clk);
2551 if (!rate)
2552 return -EINVAL;
2553
2554 inc = div64_ul(1000000000ULL << 20, rate);
2555
2556 if (inc < GTI_TIV_MIN || inc > GTI_TIV_MAX) {
2557 dev_err(dev, "gti.tiv increment 0x%llx is outside the range 0x%x - 0x%x\n",
2558 inc, GTI_TIV_MIN, GTI_TIV_MAX);
2559 return -EINVAL;
2560 }
2561
2562 ravb_write(ndev, inc, GTI);
2563
2564 return 0;
2565 }
2566
ravb_set_config_mode(struct net_device * ndev)2567 static int ravb_set_config_mode(struct net_device *ndev)
2568 {
2569 struct ravb_private *priv = netdev_priv(ndev);
2570 const struct ravb_hw_info *info = priv->info;
2571 int error;
2572
2573 if (info->gptp) {
2574 error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
2575 if (error)
2576 return error;
2577 /* Set CSEL value */
2578 ravb_modify(ndev, CCC, CCC_CSEL, CCC_CSEL_HPB);
2579 } else if (info->ccc_gac) {
2580 error = ravb_set_opmode(ndev, CCC_OPC_CONFIG | CCC_GAC | CCC_CSEL_HPB);
2581 } else {
2582 error = ravb_set_opmode(ndev, CCC_OPC_CONFIG);
2583 }
2584
2585 return error;
2586 }
2587
2588 /* Set tx and rx clock internal delay modes */
ravb_parse_delay_mode(struct device_node * np,struct net_device * ndev)2589 static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
2590 {
2591 struct ravb_private *priv = netdev_priv(ndev);
2592 bool explicit_delay = false;
2593 u32 delay;
2594
2595 if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
2596 /* Valid values are 0 and 1800, according to DT bindings */
2597 priv->rxcidm = !!delay;
2598 explicit_delay = true;
2599 }
2600 if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
2601 /* Valid values are 0 and 2000, according to DT bindings */
2602 priv->txcidm = !!delay;
2603 explicit_delay = true;
2604 }
2605
2606 if (explicit_delay)
2607 return;
2608
2609 /* Fall back to legacy rgmii-*id behavior */
2610 if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
2611 priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
2612 priv->rxcidm = 1;
2613 priv->rgmii_override = 1;
2614 }
2615
2616 if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
2617 priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
2618 priv->txcidm = 1;
2619 priv->rgmii_override = 1;
2620 }
2621 }
2622
ravb_set_delay_mode(struct net_device * ndev)2623 static void ravb_set_delay_mode(struct net_device *ndev)
2624 {
2625 struct ravb_private *priv = netdev_priv(ndev);
2626 u32 set = 0;
2627
2628 if (priv->rxcidm)
2629 set |= APSR_RDM;
2630 if (priv->txcidm)
2631 set |= APSR_TDM;
2632 ravb_modify(ndev, APSR, APSR_RDM | APSR_TDM, set);
2633 }
2634
ravb_probe(struct platform_device * pdev)2635 static int ravb_probe(struct platform_device *pdev)
2636 {
2637 struct device_node *np = pdev->dev.of_node;
2638 const struct ravb_hw_info *info;
2639 struct reset_control *rstc;
2640 struct ravb_private *priv;
2641 struct net_device *ndev;
2642 int error, irq, q;
2643 struct resource *res;
2644 int i;
2645
2646 if (!np) {
2647 dev_err(&pdev->dev,
2648 "this driver is required to be instantiated from device tree\n");
2649 return -EINVAL;
2650 }
2651
2652 rstc = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
2653 if (IS_ERR(rstc))
2654 return dev_err_probe(&pdev->dev, PTR_ERR(rstc),
2655 "failed to get cpg reset\n");
2656
2657 ndev = alloc_etherdev_mqs(sizeof(struct ravb_private),
2658 NUM_TX_QUEUE, NUM_RX_QUEUE);
2659 if (!ndev)
2660 return -ENOMEM;
2661
2662 info = of_device_get_match_data(&pdev->dev);
2663
2664 ndev->features = info->net_features;
2665 ndev->hw_features = info->net_hw_features;
2666
2667 error = reset_control_deassert(rstc);
2668 if (error)
2669 goto out_free_netdev;
2670
2671 pm_runtime_enable(&pdev->dev);
2672 error = pm_runtime_resume_and_get(&pdev->dev);
2673 if (error < 0)
2674 goto out_rpm_disable;
2675
2676 if (info->multi_irqs) {
2677 if (info->err_mgmt_irqs)
2678 irq = platform_get_irq_byname(pdev, "dia");
2679 else
2680 irq = platform_get_irq_byname(pdev, "ch22");
2681 } else {
2682 irq = platform_get_irq(pdev, 0);
2683 }
2684 if (irq < 0) {
2685 error = irq;
2686 goto out_release;
2687 }
2688 ndev->irq = irq;
2689
2690 SET_NETDEV_DEV(ndev, &pdev->dev);
2691
2692 priv = netdev_priv(ndev);
2693 priv->info = info;
2694 priv->rstc = rstc;
2695 priv->ndev = ndev;
2696 priv->pdev = pdev;
2697 priv->num_tx_ring[RAVB_BE] = BE_TX_RING_SIZE;
2698 priv->num_rx_ring[RAVB_BE] = BE_RX_RING_SIZE;
2699 if (info->nc_queues) {
2700 priv->num_tx_ring[RAVB_NC] = NC_TX_RING_SIZE;
2701 priv->num_rx_ring[RAVB_NC] = NC_RX_RING_SIZE;
2702 }
2703
2704 priv->addr = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
2705 if (IS_ERR(priv->addr)) {
2706 error = PTR_ERR(priv->addr);
2707 goto out_release;
2708 }
2709
2710 /* The Ether-specific entries in the device structure. */
2711 ndev->base_addr = res->start;
2712
2713 spin_lock_init(&priv->lock);
2714 INIT_WORK(&priv->work, ravb_tx_timeout_work);
2715
2716 error = of_get_phy_mode(np, &priv->phy_interface);
2717 if (error && error != -ENODEV)
2718 goto out_release;
2719
2720 priv->no_avb_link = of_property_read_bool(np, "renesas,no-ether-link");
2721 priv->avb_link_active_low =
2722 of_property_read_bool(np, "renesas,ether-link-active-low");
2723
2724 if (info->multi_irqs) {
2725 if (info->err_mgmt_irqs)
2726 irq = platform_get_irq_byname(pdev, "line3");
2727 else
2728 irq = platform_get_irq_byname(pdev, "ch24");
2729 if (irq < 0) {
2730 error = irq;
2731 goto out_release;
2732 }
2733 priv->emac_irq = irq;
2734 for (i = 0; i < NUM_RX_QUEUE; i++) {
2735 irq = platform_get_irq_byname(pdev, ravb_rx_irqs[i]);
2736 if (irq < 0) {
2737 error = irq;
2738 goto out_release;
2739 }
2740 priv->rx_irqs[i] = irq;
2741 }
2742 for (i = 0; i < NUM_TX_QUEUE; i++) {
2743 irq = platform_get_irq_byname(pdev, ravb_tx_irqs[i]);
2744 if (irq < 0) {
2745 error = irq;
2746 goto out_release;
2747 }
2748 priv->tx_irqs[i] = irq;
2749 }
2750
2751 if (info->err_mgmt_irqs) {
2752 irq = platform_get_irq_byname(pdev, "err_a");
2753 if (irq < 0) {
2754 error = irq;
2755 goto out_release;
2756 }
2757 priv->erra_irq = irq;
2758
2759 irq = platform_get_irq_byname(pdev, "mgmt_a");
2760 if (irq < 0) {
2761 error = irq;
2762 goto out_release;
2763 }
2764 priv->mgmta_irq = irq;
2765 }
2766 }
2767
2768 priv->clk = devm_clk_get(&pdev->dev, NULL);
2769 if (IS_ERR(priv->clk)) {
2770 error = PTR_ERR(priv->clk);
2771 goto out_release;
2772 }
2773
2774 priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
2775 if (IS_ERR(priv->refclk)) {
2776 error = PTR_ERR(priv->refclk);
2777 goto out_release;
2778 }
2779 clk_prepare_enable(priv->refclk);
2780
2781 if (info->gptp_ref_clk) {
2782 priv->gptp_clk = devm_clk_get(&pdev->dev, "gptp");
2783 if (IS_ERR(priv->gptp_clk)) {
2784 error = PTR_ERR(priv->gptp_clk);
2785 goto out_disable_refclk;
2786 }
2787 clk_prepare_enable(priv->gptp_clk);
2788 }
2789
2790 ndev->max_mtu = info->rx_max_buf_size - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
2791 ndev->min_mtu = ETH_MIN_MTU;
2792
2793 /* FIXME: R-Car Gen2 has 4byte alignment restriction for tx buffer
2794 * Use two descriptor to handle such situation. First descriptor to
2795 * handle aligned data buffer and second descriptor to handle the
2796 * overflow data because of alignment.
2797 */
2798 priv->num_tx_desc = info->aligned_tx ? 2 : 1;
2799
2800 /* Set function */
2801 ndev->netdev_ops = &ravb_netdev_ops;
2802 ndev->ethtool_ops = &ravb_ethtool_ops;
2803
2804 /* Set AVB config mode */
2805 error = ravb_set_config_mode(ndev);
2806 if (error)
2807 goto out_disable_gptp_clk;
2808
2809 if (info->gptp || info->ccc_gac) {
2810 /* Set GTI value */
2811 error = ravb_set_gti(ndev);
2812 if (error)
2813 goto out_disable_gptp_clk;
2814
2815 /* Request GTI loading */
2816 ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
2817 }
2818
2819 if (info->internal_delay) {
2820 ravb_parse_delay_mode(np, ndev);
2821 ravb_set_delay_mode(ndev);
2822 }
2823
2824 /* Allocate descriptor base address table */
2825 priv->desc_bat_size = sizeof(struct ravb_desc) * DBAT_ENTRY_NUM;
2826 priv->desc_bat = dma_alloc_coherent(ndev->dev.parent, priv->desc_bat_size,
2827 &priv->desc_bat_dma, GFP_KERNEL);
2828 if (!priv->desc_bat) {
2829 dev_err(&pdev->dev,
2830 "Cannot allocate desc base address table (size %d bytes)\n",
2831 priv->desc_bat_size);
2832 error = -ENOMEM;
2833 goto out_disable_gptp_clk;
2834 }
2835 for (q = RAVB_BE; q < DBAT_ENTRY_NUM; q++)
2836 priv->desc_bat[q].die_dt = DT_EOS;
2837 ravb_write(ndev, priv->desc_bat_dma, DBAT);
2838
2839 /* Initialise HW timestamp list */
2840 INIT_LIST_HEAD(&priv->ts_skb_list);
2841
2842 /* Initialise PTP Clock driver */
2843 if (info->ccc_gac)
2844 ravb_ptp_init(ndev, pdev);
2845
2846 /* Debug message level */
2847 priv->msg_enable = RAVB_DEF_MSG_ENABLE;
2848
2849 /* Read and set MAC address */
2850 ravb_read_mac_address(np, ndev);
2851 if (!is_valid_ether_addr(ndev->dev_addr)) {
2852 dev_warn(&pdev->dev,
2853 "no valid MAC address supplied, using a random one\n");
2854 eth_hw_addr_random(ndev);
2855 }
2856
2857 /* MDIO bus init */
2858 error = ravb_mdio_init(priv);
2859 if (error) {
2860 dev_err(&pdev->dev, "failed to initialize MDIO\n");
2861 goto out_dma_free;
2862 }
2863
2864 netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll);
2865 if (info->nc_queues)
2866 netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll);
2867
2868 /* Network device register */
2869 error = register_netdev(ndev);
2870 if (error)
2871 goto out_napi_del;
2872
2873 device_set_wakeup_capable(&pdev->dev, 1);
2874
2875 /* Print device information */
2876 netdev_info(ndev, "Base address at %#x, %pM, IRQ %d.\n",
2877 (u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
2878
2879 platform_set_drvdata(pdev, ndev);
2880
2881 return 0;
2882
2883 out_napi_del:
2884 if (info->nc_queues)
2885 netif_napi_del(&priv->napi[RAVB_NC]);
2886
2887 netif_napi_del(&priv->napi[RAVB_BE]);
2888 ravb_mdio_release(priv);
2889 out_dma_free:
2890 dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
2891 priv->desc_bat_dma);
2892
2893 /* Stop PTP Clock driver */
2894 if (info->ccc_gac)
2895 ravb_ptp_stop(ndev);
2896 out_disable_gptp_clk:
2897 clk_disable_unprepare(priv->gptp_clk);
2898 out_disable_refclk:
2899 clk_disable_unprepare(priv->refclk);
2900 out_release:
2901 pm_runtime_put(&pdev->dev);
2902 out_rpm_disable:
2903 pm_runtime_disable(&pdev->dev);
2904 reset_control_assert(rstc);
2905 out_free_netdev:
2906 free_netdev(ndev);
2907 return error;
2908 }
2909
ravb_remove(struct platform_device * pdev)2910 static int ravb_remove(struct platform_device *pdev)
2911 {
2912 struct net_device *ndev = platform_get_drvdata(pdev);
2913 struct ravb_private *priv = netdev_priv(ndev);
2914 const struct ravb_hw_info *info = priv->info;
2915
2916 unregister_netdev(ndev);
2917 if (info->nc_queues)
2918 netif_napi_del(&priv->napi[RAVB_NC]);
2919 netif_napi_del(&priv->napi[RAVB_BE]);
2920
2921 ravb_mdio_release(priv);
2922
2923 /* Stop PTP Clock driver */
2924 if (info->ccc_gac)
2925 ravb_ptp_stop(ndev);
2926
2927 dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
2928 priv->desc_bat_dma);
2929
2930 ravb_set_opmode(ndev, CCC_OPC_RESET);
2931
2932 clk_disable_unprepare(priv->gptp_clk);
2933 clk_disable_unprepare(priv->refclk);
2934
2935 pm_runtime_put_sync(&pdev->dev);
2936 pm_runtime_disable(&pdev->dev);
2937 reset_control_assert(priv->rstc);
2938 free_netdev(ndev);
2939 platform_set_drvdata(pdev, NULL);
2940
2941 return 0;
2942 }
2943
ravb_wol_setup(struct net_device * ndev)2944 static int ravb_wol_setup(struct net_device *ndev)
2945 {
2946 struct ravb_private *priv = netdev_priv(ndev);
2947 const struct ravb_hw_info *info = priv->info;
2948
2949 /* Disable interrupts by clearing the interrupt masks. */
2950 ravb_write(ndev, 0, RIC0);
2951 ravb_write(ndev, 0, RIC2);
2952 ravb_write(ndev, 0, TIC);
2953
2954 /* Only allow ECI interrupts */
2955 synchronize_irq(priv->emac_irq);
2956 if (info->nc_queues)
2957 napi_disable(&priv->napi[RAVB_NC]);
2958 napi_disable(&priv->napi[RAVB_BE]);
2959 ravb_write(ndev, ECSIPR_MPDIP, ECSIPR);
2960
2961 /* Enable MagicPacket */
2962 ravb_modify(ndev, ECMR, ECMR_MPDE, ECMR_MPDE);
2963
2964 return enable_irq_wake(priv->emac_irq);
2965 }
2966
ravb_wol_restore(struct net_device * ndev)2967 static int ravb_wol_restore(struct net_device *ndev)
2968 {
2969 struct ravb_private *priv = netdev_priv(ndev);
2970 const struct ravb_hw_info *info = priv->info;
2971
2972 if (info->nc_queues)
2973 napi_enable(&priv->napi[RAVB_NC]);
2974 napi_enable(&priv->napi[RAVB_BE]);
2975
2976 /* Disable MagicPacket */
2977 ravb_modify(ndev, ECMR, ECMR_MPDE, 0);
2978
2979 ravb_close(ndev);
2980
2981 return disable_irq_wake(priv->emac_irq);
2982 }
2983
ravb_suspend(struct device * dev)2984 static int __maybe_unused ravb_suspend(struct device *dev)
2985 {
2986 struct net_device *ndev = dev_get_drvdata(dev);
2987 struct ravb_private *priv = netdev_priv(ndev);
2988 int ret;
2989
2990 if (!netif_running(ndev))
2991 return 0;
2992
2993 netif_device_detach(ndev);
2994
2995 if (priv->wol_enabled)
2996 ret = ravb_wol_setup(ndev);
2997 else
2998 ret = ravb_close(ndev);
2999
3000 if (priv->info->ccc_gac)
3001 ravb_ptp_stop(ndev);
3002
3003 return ret;
3004 }
3005
ravb_resume(struct device * dev)3006 static int __maybe_unused ravb_resume(struct device *dev)
3007 {
3008 struct net_device *ndev = dev_get_drvdata(dev);
3009 struct ravb_private *priv = netdev_priv(ndev);
3010 const struct ravb_hw_info *info = priv->info;
3011 int ret = 0;
3012
3013 /* If WoL is enabled set reset mode to rearm the WoL logic */
3014 if (priv->wol_enabled) {
3015 ret = ravb_set_opmode(ndev, CCC_OPC_RESET);
3016 if (ret)
3017 return ret;
3018 }
3019
3020 /* All register have been reset to default values.
3021 * Restore all registers which where setup at probe time and
3022 * reopen device if it was running before system suspended.
3023 */
3024
3025 /* Set AVB config mode */
3026 ret = ravb_set_config_mode(ndev);
3027 if (ret)
3028 return ret;
3029
3030 if (info->gptp || info->ccc_gac) {
3031 /* Set GTI value */
3032 ret = ravb_set_gti(ndev);
3033 if (ret)
3034 return ret;
3035
3036 /* Request GTI loading */
3037 ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
3038 }
3039
3040 if (info->internal_delay)
3041 ravb_set_delay_mode(ndev);
3042
3043 /* Restore descriptor base address table */
3044 ravb_write(ndev, priv->desc_bat_dma, DBAT);
3045
3046 if (priv->info->ccc_gac)
3047 ravb_ptp_init(ndev, priv->pdev);
3048
3049 if (netif_running(ndev)) {
3050 if (priv->wol_enabled) {
3051 ret = ravb_wol_restore(ndev);
3052 if (ret)
3053 return ret;
3054 }
3055 ret = ravb_open(ndev);
3056 if (ret < 0)
3057 return ret;
3058 ravb_set_rx_mode(ndev);
3059 netif_device_attach(ndev);
3060 }
3061
3062 return ret;
3063 }
3064
ravb_runtime_nop(struct device * dev)3065 static int __maybe_unused ravb_runtime_nop(struct device *dev)
3066 {
3067 /* Runtime PM callback shared between ->runtime_suspend()
3068 * and ->runtime_resume(). Simply returns success.
3069 *
3070 * This driver re-initializes all registers after
3071 * pm_runtime_get_sync() anyway so there is no need
3072 * to save and restore registers here.
3073 */
3074 return 0;
3075 }
3076
3077 static const struct dev_pm_ops ravb_dev_pm_ops = {
3078 SET_SYSTEM_SLEEP_PM_OPS(ravb_suspend, ravb_resume)
3079 SET_RUNTIME_PM_OPS(ravb_runtime_nop, ravb_runtime_nop, NULL)
3080 };
3081
3082 static struct platform_driver ravb_driver = {
3083 .probe = ravb_probe,
3084 .remove = ravb_remove,
3085 .driver = {
3086 .name = "ravb",
3087 .pm = &ravb_dev_pm_ops,
3088 .of_match_table = ravb_match_table,
3089 },
3090 };
3091
3092 module_platform_driver(ravb_driver);
3093
3094 MODULE_AUTHOR("Mitsuhiro Kimura, Masaru Nagai");
3095 MODULE_DESCRIPTION("Renesas Ethernet AVB driver");
3096 MODULE_LICENSE("GPL v2");
3097