1 /*
2  * Linux driver for VMware's vmxnet3 ethernet NIC.
3  *
4  * Copyright (C) 2008-2022, VMware, Inc. All Rights Reserved.
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License as published by the
8  * Free Software Foundation; version 2 of the License and no later version.
9  *
10  * This program is distributed in the hope that it will be useful, but
11  * WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
13  * NON INFRINGEMENT. See the GNU General Public License for more
14  * details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * The full GNU General Public License is included in this distribution in
21  * the file called "COPYING".
22  *
23  * Maintained by: pv-drivers@vmware.com
24  *
25  */
26 
27 #include <linux/module.h>
28 #include <net/ip6_checksum.h>
29 
30 #include "vmxnet3_int.h"
31 #include "vmxnet3_xdp.h"
32 
33 char vmxnet3_driver_name[] = "vmxnet3";
34 #define VMXNET3_DRIVER_DESC "VMware vmxnet3 virtual NIC driver"
35 
36 /*
37  * PCI Device ID Table
38  * Last entry must be all 0s
39  */
40 static const struct pci_device_id vmxnet3_pciid_table[] = {
41 	{PCI_VDEVICE(VMWARE, PCI_DEVICE_ID_VMWARE_VMXNET3)},
42 	{0}
43 };
44 
45 MODULE_DEVICE_TABLE(pci, vmxnet3_pciid_table);
46 
47 static int enable_mq = 1;
48 
49 static void
50 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, const u8 *mac);
51 
52 /*
53  *    Enable/Disable the given intr
54  */
55 static void
vmxnet3_enable_intr(struct vmxnet3_adapter * adapter,unsigned intr_idx)56 vmxnet3_enable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
57 {
58 	VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 0);
59 }
60 
61 
62 static void
vmxnet3_disable_intr(struct vmxnet3_adapter * adapter,unsigned intr_idx)63 vmxnet3_disable_intr(struct vmxnet3_adapter *adapter, unsigned intr_idx)
64 {
65 	VMXNET3_WRITE_BAR0_REG(adapter, VMXNET3_REG_IMR + intr_idx * 8, 1);
66 }
67 
68 
69 /*
70  *    Enable/Disable all intrs used by the device
71  */
72 static void
vmxnet3_enable_all_intrs(struct vmxnet3_adapter * adapter)73 vmxnet3_enable_all_intrs(struct vmxnet3_adapter *adapter)
74 {
75 	int i;
76 
77 	for (i = 0; i < adapter->intr.num_intrs; i++)
78 		vmxnet3_enable_intr(adapter, i);
79 	if (!VMXNET3_VERSION_GE_6(adapter) ||
80 	    !adapter->queuesExtEnabled) {
81 		adapter->shared->devRead.intrConf.intrCtrl &=
82 					cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
83 	} else {
84 		adapter->shared->devReadExt.intrConfExt.intrCtrl &=
85 					cpu_to_le32(~VMXNET3_IC_DISABLE_ALL);
86 	}
87 }
88 
89 
90 static void
vmxnet3_disable_all_intrs(struct vmxnet3_adapter * adapter)91 vmxnet3_disable_all_intrs(struct vmxnet3_adapter *adapter)
92 {
93 	int i;
94 
95 	if (!VMXNET3_VERSION_GE_6(adapter) ||
96 	    !adapter->queuesExtEnabled) {
97 		adapter->shared->devRead.intrConf.intrCtrl |=
98 					cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
99 	} else {
100 		adapter->shared->devReadExt.intrConfExt.intrCtrl |=
101 					cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
102 	}
103 	for (i = 0; i < adapter->intr.num_intrs; i++)
104 		vmxnet3_disable_intr(adapter, i);
105 }
106 
107 
108 static void
vmxnet3_ack_events(struct vmxnet3_adapter * adapter,u32 events)109 vmxnet3_ack_events(struct vmxnet3_adapter *adapter, u32 events)
110 {
111 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_ECR, events);
112 }
113 
114 
115 static bool
vmxnet3_tq_stopped(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)116 vmxnet3_tq_stopped(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
117 {
118 	return tq->stopped;
119 }
120 
121 
122 static void
vmxnet3_tq_start(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)123 vmxnet3_tq_start(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
124 {
125 	tq->stopped = false;
126 	netif_start_subqueue(adapter->netdev, tq - adapter->tx_queue);
127 }
128 
129 
130 static void
vmxnet3_tq_wake(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)131 vmxnet3_tq_wake(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
132 {
133 	tq->stopped = false;
134 	netif_wake_subqueue(adapter->netdev, (tq - adapter->tx_queue));
135 }
136 
137 
138 static void
vmxnet3_tq_stop(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)139 vmxnet3_tq_stop(struct vmxnet3_tx_queue *tq, struct vmxnet3_adapter *adapter)
140 {
141 	tq->stopped = true;
142 	tq->num_stop++;
143 	netif_stop_subqueue(adapter->netdev, (tq - adapter->tx_queue));
144 }
145 
146 /* Check if capability is supported by UPT device or
147  * UPT is even requested
148  */
149 bool
vmxnet3_check_ptcapability(u32 cap_supported,u32 cap)150 vmxnet3_check_ptcapability(u32 cap_supported, u32 cap)
151 {
152 	if (cap_supported & (1UL << VMXNET3_DCR_ERROR) ||
153 	    cap_supported & (1UL << cap)) {
154 		return true;
155 	}
156 
157 	return false;
158 }
159 
160 
161 /*
162  * Check the link state. This may start or stop the tx queue.
163  */
164 static void
vmxnet3_check_link(struct vmxnet3_adapter * adapter,bool affectTxQueue)165 vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
166 {
167 	u32 ret;
168 	int i;
169 	unsigned long flags;
170 
171 	spin_lock_irqsave(&adapter->cmd_lock, flags);
172 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_LINK);
173 	ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
174 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
175 
176 	adapter->link_speed = ret >> 16;
177 	if (ret & 1) { /* Link is up. */
178 		netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n",
179 			    adapter->link_speed);
180 		netif_carrier_on(adapter->netdev);
181 
182 		if (affectTxQueue) {
183 			for (i = 0; i < adapter->num_tx_queues; i++)
184 				vmxnet3_tq_start(&adapter->tx_queue[i],
185 						 adapter);
186 		}
187 	} else {
188 		netdev_info(adapter->netdev, "NIC Link is Down\n");
189 		netif_carrier_off(adapter->netdev);
190 
191 		if (affectTxQueue) {
192 			for (i = 0; i < adapter->num_tx_queues; i++)
193 				vmxnet3_tq_stop(&adapter->tx_queue[i], adapter);
194 		}
195 	}
196 }
197 
198 static void
vmxnet3_process_events(struct vmxnet3_adapter * adapter)199 vmxnet3_process_events(struct vmxnet3_adapter *adapter)
200 {
201 	int i;
202 	unsigned long flags;
203 	u32 events = le32_to_cpu(adapter->shared->ecr);
204 	if (!events)
205 		return;
206 
207 	vmxnet3_ack_events(adapter, events);
208 
209 	/* Check if link state has changed */
210 	if (events & VMXNET3_ECR_LINK)
211 		vmxnet3_check_link(adapter, true);
212 
213 	/* Check if there is an error on xmit/recv queues */
214 	if (events & (VMXNET3_ECR_TQERR | VMXNET3_ECR_RQERR)) {
215 		spin_lock_irqsave(&adapter->cmd_lock, flags);
216 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
217 				       VMXNET3_CMD_GET_QUEUE_STATUS);
218 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
219 
220 		for (i = 0; i < adapter->num_tx_queues; i++)
221 			if (adapter->tqd_start[i].status.stopped)
222 				dev_err(&adapter->netdev->dev,
223 					"%s: tq[%d] error 0x%x\n",
224 					adapter->netdev->name, i, le32_to_cpu(
225 					adapter->tqd_start[i].status.error));
226 		for (i = 0; i < adapter->num_rx_queues; i++)
227 			if (adapter->rqd_start[i].status.stopped)
228 				dev_err(&adapter->netdev->dev,
229 					"%s: rq[%d] error 0x%x\n",
230 					adapter->netdev->name, i,
231 					adapter->rqd_start[i].status.error);
232 
233 		schedule_work(&adapter->work);
234 	}
235 }
236 
237 #ifdef __BIG_ENDIAN_BITFIELD
238 /*
239  * The device expects the bitfields in shared structures to be written in
240  * little endian. When CPU is big endian, the following routines are used to
241  * correctly read and write into ABI.
242  * The general technique used here is : double word bitfields are defined in
243  * opposite order for big endian architecture. Then before reading them in
244  * driver the complete double word is translated using le32_to_cpu. Similarly
245  * After the driver writes into bitfields, cpu_to_le32 is used to translate the
246  * double words into required format.
247  * In order to avoid touching bits in shared structure more than once, temporary
248  * descriptors are used. These are passed as srcDesc to following functions.
249  */
vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc * srcDesc,struct Vmxnet3_RxDesc * dstDesc)250 static void vmxnet3_RxDescToCPU(const struct Vmxnet3_RxDesc *srcDesc,
251 				struct Vmxnet3_RxDesc *dstDesc)
252 {
253 	u32 *src = (u32 *)srcDesc + 2;
254 	u32 *dst = (u32 *)dstDesc + 2;
255 	dstDesc->addr = le64_to_cpu(srcDesc->addr);
256 	*dst = le32_to_cpu(*src);
257 	dstDesc->ext1 = le32_to_cpu(srcDesc->ext1);
258 }
259 
vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc * srcDesc,struct Vmxnet3_TxDesc * dstDesc)260 static void vmxnet3_TxDescToLe(const struct Vmxnet3_TxDesc *srcDesc,
261 			       struct Vmxnet3_TxDesc *dstDesc)
262 {
263 	int i;
264 	u32 *src = (u32 *)(srcDesc + 1);
265 	u32 *dst = (u32 *)(dstDesc + 1);
266 
267 	/* Working backwards so that the gen bit is set at the end. */
268 	for (i = 2; i > 0; i--) {
269 		src--;
270 		dst--;
271 		*dst = cpu_to_le32(*src);
272 	}
273 }
274 
275 
vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc * srcDesc,struct Vmxnet3_RxCompDesc * dstDesc)276 static void vmxnet3_RxCompToCPU(const struct Vmxnet3_RxCompDesc *srcDesc,
277 				struct Vmxnet3_RxCompDesc *dstDesc)
278 {
279 	int i = 0;
280 	u32 *src = (u32 *)srcDesc;
281 	u32 *dst = (u32 *)dstDesc;
282 	for (i = 0; i < sizeof(struct Vmxnet3_RxCompDesc) / sizeof(u32); i++) {
283 		*dst = le32_to_cpu(*src);
284 		src++;
285 		dst++;
286 	}
287 }
288 
289 
290 /* Used to read bitfield values from double words. */
get_bitfield32(const __le32 * bitfield,u32 pos,u32 size)291 static u32 get_bitfield32(const __le32 *bitfield, u32 pos, u32 size)
292 {
293 	u32 temp = le32_to_cpu(*bitfield);
294 	u32 mask = ((1 << size) - 1) << pos;
295 	temp &= mask;
296 	temp >>= pos;
297 	return temp;
298 }
299 
300 
301 
302 #endif  /* __BIG_ENDIAN_BITFIELD */
303 
304 #ifdef __BIG_ENDIAN_BITFIELD
305 
306 #   define VMXNET3_TXDESC_GET_GEN(txdesc) get_bitfield32(((const __le32 *) \
307 			txdesc) + VMXNET3_TXD_GEN_DWORD_SHIFT, \
308 			VMXNET3_TXD_GEN_SHIFT, VMXNET3_TXD_GEN_SIZE)
309 #   define VMXNET3_TXDESC_GET_EOP(txdesc) get_bitfield32(((const __le32 *) \
310 			txdesc) + VMXNET3_TXD_EOP_DWORD_SHIFT, \
311 			VMXNET3_TXD_EOP_SHIFT, VMXNET3_TXD_EOP_SIZE)
312 #   define VMXNET3_TCD_GET_GEN(tcd) get_bitfield32(((const __le32 *)tcd) + \
313 			VMXNET3_TCD_GEN_DWORD_SHIFT, VMXNET3_TCD_GEN_SHIFT, \
314 			VMXNET3_TCD_GEN_SIZE)
315 #   define VMXNET3_TCD_GET_TXIDX(tcd) get_bitfield32((const __le32 *)tcd, \
316 			VMXNET3_TCD_TXIDX_SHIFT, VMXNET3_TCD_TXIDX_SIZE)
317 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) do { \
318 			(dstrcd) = (tmp); \
319 			vmxnet3_RxCompToCPU((rcd), (tmp)); \
320 		} while (0)
321 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) do { \
322 			(dstrxd) = (tmp); \
323 			vmxnet3_RxDescToCPU((rxd), (tmp)); \
324 		} while (0)
325 
326 #else
327 
328 #   define VMXNET3_TXDESC_GET_GEN(txdesc) ((txdesc)->gen)
329 #   define VMXNET3_TXDESC_GET_EOP(txdesc) ((txdesc)->eop)
330 #   define VMXNET3_TCD_GET_GEN(tcd) ((tcd)->gen)
331 #   define VMXNET3_TCD_GET_TXIDX(tcd) ((tcd)->txdIdx)
332 #   define vmxnet3_getRxComp(dstrcd, rcd, tmp) (dstrcd) = (rcd)
333 #   define vmxnet3_getRxDesc(dstrxd, rxd, tmp) (dstrxd) = (rxd)
334 
335 #endif /* __BIG_ENDIAN_BITFIELD  */
336 
337 
338 static void
vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info * tbi,struct pci_dev * pdev)339 vmxnet3_unmap_tx_buf(struct vmxnet3_tx_buf_info *tbi,
340 		     struct pci_dev *pdev)
341 {
342 	u32 map_type = tbi->map_type;
343 
344 	if (map_type & VMXNET3_MAP_SINGLE)
345 		dma_unmap_single(&pdev->dev, tbi->dma_addr, tbi->len,
346 				 DMA_TO_DEVICE);
347 	else if (map_type & VMXNET3_MAP_PAGE)
348 		dma_unmap_page(&pdev->dev, tbi->dma_addr, tbi->len,
349 			       DMA_TO_DEVICE);
350 	else
351 		BUG_ON(map_type & ~VMXNET3_MAP_XDP);
352 
353 	tbi->map_type = VMXNET3_MAP_NONE; /* to help debugging */
354 }
355 
356 
357 static int
vmxnet3_unmap_pkt(u32 eop_idx,struct vmxnet3_tx_queue * tq,struct pci_dev * pdev,struct vmxnet3_adapter * adapter,struct xdp_frame_bulk * bq)358 vmxnet3_unmap_pkt(u32 eop_idx, struct vmxnet3_tx_queue *tq,
359 		  struct pci_dev *pdev,	struct vmxnet3_adapter *adapter,
360 		  struct xdp_frame_bulk *bq)
361 {
362 	struct vmxnet3_tx_buf_info *tbi;
363 	int entries = 0;
364 	u32 map_type;
365 
366 	/* no out of order completion */
367 	BUG_ON(tq->buf_info[eop_idx].sop_idx != tq->tx_ring.next2comp);
368 	BUG_ON(VMXNET3_TXDESC_GET_EOP(&(tq->tx_ring.base[eop_idx].txd)) != 1);
369 
370 	tbi = &tq->buf_info[eop_idx];
371 	BUG_ON(!tbi->skb);
372 	map_type = tbi->map_type;
373 	VMXNET3_INC_RING_IDX_ONLY(eop_idx, tq->tx_ring.size);
374 
375 	while (tq->tx_ring.next2comp != eop_idx) {
376 		vmxnet3_unmap_tx_buf(tq->buf_info + tq->tx_ring.next2comp,
377 				     pdev);
378 
379 		/* update next2comp w/o tx_lock. Since we are marking more,
380 		 * instead of less, tx ring entries avail, the worst case is
381 		 * that the tx routine incorrectly re-queues a pkt due to
382 		 * insufficient tx ring entries.
383 		 */
384 		vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
385 		entries++;
386 	}
387 
388 	if (map_type & VMXNET3_MAP_XDP)
389 		xdp_return_frame_bulk(tbi->xdpf, bq);
390 	else
391 		dev_kfree_skb_any(tbi->skb);
392 
393 	/* xdpf and skb are in an anonymous union. */
394 	tbi->skb = NULL;
395 
396 	return entries;
397 }
398 
399 
400 static int
vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)401 vmxnet3_tq_tx_complete(struct vmxnet3_tx_queue *tq,
402 			struct vmxnet3_adapter *adapter)
403 {
404 	union Vmxnet3_GenericDesc *gdesc;
405 	struct xdp_frame_bulk bq;
406 	int completed = 0;
407 
408 	xdp_frame_bulk_init(&bq);
409 	rcu_read_lock();
410 
411 	gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
412 	while (VMXNET3_TCD_GET_GEN(&gdesc->tcd) == tq->comp_ring.gen) {
413 		/* Prevent any &gdesc->tcd field from being (speculatively)
414 		 * read before (&gdesc->tcd)->gen is read.
415 		 */
416 		dma_rmb();
417 
418 		completed += vmxnet3_unmap_pkt(VMXNET3_TCD_GET_TXIDX(
419 					       &gdesc->tcd), tq, adapter->pdev,
420 					       adapter, &bq);
421 
422 		vmxnet3_comp_ring_adv_next2proc(&tq->comp_ring);
423 		gdesc = tq->comp_ring.base + tq->comp_ring.next2proc;
424 	}
425 	xdp_flush_frame_bulk(&bq);
426 	rcu_read_unlock();
427 
428 	if (completed) {
429 		spin_lock(&tq->tx_lock);
430 		if (unlikely(vmxnet3_tq_stopped(tq, adapter) &&
431 			     vmxnet3_cmd_ring_desc_avail(&tq->tx_ring) >
432 			     VMXNET3_WAKE_QUEUE_THRESHOLD(tq) &&
433 			     netif_carrier_ok(adapter->netdev))) {
434 			vmxnet3_tq_wake(tq, adapter);
435 		}
436 		spin_unlock(&tq->tx_lock);
437 	}
438 	return completed;
439 }
440 
441 
442 static void
vmxnet3_tq_cleanup(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)443 vmxnet3_tq_cleanup(struct vmxnet3_tx_queue *tq,
444 		   struct vmxnet3_adapter *adapter)
445 {
446 	struct xdp_frame_bulk bq;
447 	u32 map_type;
448 	int i;
449 
450 	xdp_frame_bulk_init(&bq);
451 	rcu_read_lock();
452 
453 	while (tq->tx_ring.next2comp != tq->tx_ring.next2fill) {
454 		struct vmxnet3_tx_buf_info *tbi;
455 
456 		tbi = tq->buf_info + tq->tx_ring.next2comp;
457 		map_type = tbi->map_type;
458 
459 		vmxnet3_unmap_tx_buf(tbi, adapter->pdev);
460 		if (tbi->skb) {
461 			if (map_type & VMXNET3_MAP_XDP)
462 				xdp_return_frame_bulk(tbi->xdpf, &bq);
463 			else
464 				dev_kfree_skb_any(tbi->skb);
465 			tbi->skb = NULL;
466 		}
467 		vmxnet3_cmd_ring_adv_next2comp(&tq->tx_ring);
468 	}
469 
470 	xdp_flush_frame_bulk(&bq);
471 	rcu_read_unlock();
472 
473 	/* sanity check, verify all buffers are indeed unmapped */
474 	for (i = 0; i < tq->tx_ring.size; i++)
475 		BUG_ON(tq->buf_info[i].map_type != VMXNET3_MAP_NONE);
476 
477 	tq->tx_ring.gen = VMXNET3_INIT_GEN;
478 	tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
479 
480 	tq->comp_ring.gen = VMXNET3_INIT_GEN;
481 	tq->comp_ring.next2proc = 0;
482 }
483 
484 
485 static void
vmxnet3_tq_destroy(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)486 vmxnet3_tq_destroy(struct vmxnet3_tx_queue *tq,
487 		   struct vmxnet3_adapter *adapter)
488 {
489 	if (tq->tx_ring.base) {
490 		dma_free_coherent(&adapter->pdev->dev, tq->tx_ring.size *
491 				  sizeof(struct Vmxnet3_TxDesc),
492 				  tq->tx_ring.base, tq->tx_ring.basePA);
493 		tq->tx_ring.base = NULL;
494 	}
495 	if (tq->data_ring.base) {
496 		dma_free_coherent(&adapter->pdev->dev,
497 				  tq->data_ring.size * tq->txdata_desc_size,
498 				  tq->data_ring.base, tq->data_ring.basePA);
499 		tq->data_ring.base = NULL;
500 	}
501 	if (tq->comp_ring.base) {
502 		dma_free_coherent(&adapter->pdev->dev, tq->comp_ring.size *
503 				  sizeof(struct Vmxnet3_TxCompDesc),
504 				  tq->comp_ring.base, tq->comp_ring.basePA);
505 		tq->comp_ring.base = NULL;
506 	}
507 	kfree(tq->buf_info);
508 	tq->buf_info = NULL;
509 }
510 
511 
512 /* Destroy all tx queues */
513 void
vmxnet3_tq_destroy_all(struct vmxnet3_adapter * adapter)514 vmxnet3_tq_destroy_all(struct vmxnet3_adapter *adapter)
515 {
516 	int i;
517 
518 	for (i = 0; i < adapter->num_tx_queues; i++)
519 		vmxnet3_tq_destroy(&adapter->tx_queue[i], adapter);
520 }
521 
522 
523 static void
vmxnet3_tq_init(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)524 vmxnet3_tq_init(struct vmxnet3_tx_queue *tq,
525 		struct vmxnet3_adapter *adapter)
526 {
527 	int i;
528 
529 	/* reset the tx ring contents to 0 and reset the tx ring states */
530 	memset(tq->tx_ring.base, 0, tq->tx_ring.size *
531 	       sizeof(struct Vmxnet3_TxDesc));
532 	tq->tx_ring.next2fill = tq->tx_ring.next2comp = 0;
533 	tq->tx_ring.gen = VMXNET3_INIT_GEN;
534 
535 	memset(tq->data_ring.base, 0,
536 	       tq->data_ring.size * tq->txdata_desc_size);
537 
538 	/* reset the tx comp ring contents to 0 and reset comp ring states */
539 	memset(tq->comp_ring.base, 0, tq->comp_ring.size *
540 	       sizeof(struct Vmxnet3_TxCompDesc));
541 	tq->comp_ring.next2proc = 0;
542 	tq->comp_ring.gen = VMXNET3_INIT_GEN;
543 
544 	/* reset the bookkeeping data */
545 	memset(tq->buf_info, 0, sizeof(tq->buf_info[0]) * tq->tx_ring.size);
546 	for (i = 0; i < tq->tx_ring.size; i++)
547 		tq->buf_info[i].map_type = VMXNET3_MAP_NONE;
548 
549 	/* stats are not reset */
550 }
551 
552 
553 static int
vmxnet3_tq_create(struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter)554 vmxnet3_tq_create(struct vmxnet3_tx_queue *tq,
555 		  struct vmxnet3_adapter *adapter)
556 {
557 	BUG_ON(tq->tx_ring.base || tq->data_ring.base ||
558 	       tq->comp_ring.base || tq->buf_info);
559 
560 	tq->tx_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
561 			tq->tx_ring.size * sizeof(struct Vmxnet3_TxDesc),
562 			&tq->tx_ring.basePA, GFP_KERNEL);
563 	if (!tq->tx_ring.base) {
564 		netdev_err(adapter->netdev, "failed to allocate tx ring\n");
565 		goto err;
566 	}
567 
568 	tq->data_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
569 			tq->data_ring.size * tq->txdata_desc_size,
570 			&tq->data_ring.basePA, GFP_KERNEL);
571 	if (!tq->data_ring.base) {
572 		netdev_err(adapter->netdev, "failed to allocate tx data ring\n");
573 		goto err;
574 	}
575 
576 	tq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev,
577 			tq->comp_ring.size * sizeof(struct Vmxnet3_TxCompDesc),
578 			&tq->comp_ring.basePA, GFP_KERNEL);
579 	if (!tq->comp_ring.base) {
580 		netdev_err(adapter->netdev, "failed to allocate tx comp ring\n");
581 		goto err;
582 	}
583 
584 	tq->buf_info = kcalloc_node(tq->tx_ring.size, sizeof(tq->buf_info[0]),
585 				    GFP_KERNEL,
586 				    dev_to_node(&adapter->pdev->dev));
587 	if (!tq->buf_info)
588 		goto err;
589 
590 	return 0;
591 
592 err:
593 	vmxnet3_tq_destroy(tq, adapter);
594 	return -ENOMEM;
595 }
596 
597 static void
vmxnet3_tq_cleanup_all(struct vmxnet3_adapter * adapter)598 vmxnet3_tq_cleanup_all(struct vmxnet3_adapter *adapter)
599 {
600 	int i;
601 
602 	for (i = 0; i < adapter->num_tx_queues; i++)
603 		vmxnet3_tq_cleanup(&adapter->tx_queue[i], adapter);
604 }
605 
606 /*
607  *    starting from ring->next2fill, allocate rx buffers for the given ring
608  *    of the rx queue and update the rx desc. stop after @num_to_alloc buffers
609  *    are allocated or allocation fails
610  */
611 
612 static int
vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue * rq,u32 ring_idx,int num_to_alloc,struct vmxnet3_adapter * adapter)613 vmxnet3_rq_alloc_rx_buf(struct vmxnet3_rx_queue *rq, u32 ring_idx,
614 			int num_to_alloc, struct vmxnet3_adapter *adapter)
615 {
616 	int num_allocated = 0;
617 	struct vmxnet3_rx_buf_info *rbi_base = rq->buf_info[ring_idx];
618 	struct vmxnet3_cmd_ring *ring = &rq->rx_ring[ring_idx];
619 	u32 val;
620 
621 	while (num_allocated <= num_to_alloc) {
622 		struct vmxnet3_rx_buf_info *rbi;
623 		union Vmxnet3_GenericDesc *gd;
624 
625 		rbi = rbi_base + ring->next2fill;
626 		gd = ring->base + ring->next2fill;
627 		rbi->comp_state = VMXNET3_RXD_COMP_PENDING;
628 
629 		if (rbi->buf_type == VMXNET3_RX_BUF_XDP) {
630 			void *data = vmxnet3_pp_get_buff(rq->page_pool,
631 							 &rbi->dma_addr,
632 							 GFP_KERNEL);
633 			if (!data) {
634 				rq->stats.rx_buf_alloc_failure++;
635 				break;
636 			}
637 			rbi->page = virt_to_page(data);
638 			val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
639 		} else if (rbi->buf_type == VMXNET3_RX_BUF_SKB) {
640 			if (rbi->skb == NULL) {
641 				rbi->skb = __netdev_alloc_skb_ip_align(adapter->netdev,
642 								       rbi->len,
643 								       GFP_KERNEL);
644 				if (unlikely(rbi->skb == NULL)) {
645 					rq->stats.rx_buf_alloc_failure++;
646 					break;
647 				}
648 
649 				rbi->dma_addr = dma_map_single(
650 						&adapter->pdev->dev,
651 						rbi->skb->data, rbi->len,
652 						DMA_FROM_DEVICE);
653 				if (dma_mapping_error(&adapter->pdev->dev,
654 						      rbi->dma_addr)) {
655 					dev_kfree_skb_any(rbi->skb);
656 					rbi->skb = NULL;
657 					rq->stats.rx_buf_alloc_failure++;
658 					break;
659 				}
660 			} else {
661 				/* rx buffer skipped by the device */
662 			}
663 			val = VMXNET3_RXD_BTYPE_HEAD << VMXNET3_RXD_BTYPE_SHIFT;
664 		} else {
665 			BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE ||
666 			       rbi->len  != PAGE_SIZE);
667 
668 			if (rbi->page == NULL) {
669 				rbi->page = alloc_page(GFP_ATOMIC);
670 				if (unlikely(rbi->page == NULL)) {
671 					rq->stats.rx_buf_alloc_failure++;
672 					break;
673 				}
674 				rbi->dma_addr = dma_map_page(
675 						&adapter->pdev->dev,
676 						rbi->page, 0, PAGE_SIZE,
677 						DMA_FROM_DEVICE);
678 				if (dma_mapping_error(&adapter->pdev->dev,
679 						      rbi->dma_addr)) {
680 					put_page(rbi->page);
681 					rbi->page = NULL;
682 					rq->stats.rx_buf_alloc_failure++;
683 					break;
684 				}
685 			} else {
686 				/* rx buffers skipped by the device */
687 			}
688 			val = VMXNET3_RXD_BTYPE_BODY << VMXNET3_RXD_BTYPE_SHIFT;
689 		}
690 
691 		gd->rxd.addr = cpu_to_le64(rbi->dma_addr);
692 		gd->dword[2] = cpu_to_le32((!ring->gen << VMXNET3_RXD_GEN_SHIFT)
693 					   | val | rbi->len);
694 
695 		/* Fill the last buffer but dont mark it ready, or else the
696 		 * device will think that the queue is full */
697 		if (num_allocated == num_to_alloc) {
698 			rbi->comp_state = VMXNET3_RXD_COMP_DONE;
699 			break;
700 		}
701 
702 		gd->dword[2] |= cpu_to_le32(ring->gen << VMXNET3_RXD_GEN_SHIFT);
703 		num_allocated++;
704 		vmxnet3_cmd_ring_adv_next2fill(ring);
705 	}
706 
707 	netdev_dbg(adapter->netdev,
708 		"alloc_rx_buf: %d allocated, next2fill %u, next2comp %u\n",
709 		num_allocated, ring->next2fill, ring->next2comp);
710 
711 	/* so that the device can distinguish a full ring and an empty ring */
712 	BUG_ON(num_allocated != 0 && ring->next2fill == ring->next2comp);
713 
714 	return num_allocated;
715 }
716 
717 
718 static void
vmxnet3_append_frag(struct sk_buff * skb,struct Vmxnet3_RxCompDesc * rcd,struct vmxnet3_rx_buf_info * rbi)719 vmxnet3_append_frag(struct sk_buff *skb, struct Vmxnet3_RxCompDesc *rcd,
720 		    struct vmxnet3_rx_buf_info *rbi)
721 {
722 	skb_frag_t *frag = skb_shinfo(skb)->frags + skb_shinfo(skb)->nr_frags;
723 
724 	BUG_ON(skb_shinfo(skb)->nr_frags >= MAX_SKB_FRAGS);
725 
726 	skb_frag_fill_page_desc(frag, rbi->page, 0, rcd->len);
727 	skb->data_len += rcd->len;
728 	skb->truesize += PAGE_SIZE;
729 	skb_shinfo(skb)->nr_frags++;
730 }
731 
732 
733 static int
vmxnet3_map_pkt(struct sk_buff * skb,struct vmxnet3_tx_ctx * ctx,struct vmxnet3_tx_queue * tq,struct pci_dev * pdev,struct vmxnet3_adapter * adapter)734 vmxnet3_map_pkt(struct sk_buff *skb, struct vmxnet3_tx_ctx *ctx,
735 		struct vmxnet3_tx_queue *tq, struct pci_dev *pdev,
736 		struct vmxnet3_adapter *adapter)
737 {
738 	u32 dw2, len;
739 	unsigned long buf_offset;
740 	int i;
741 	union Vmxnet3_GenericDesc *gdesc;
742 	struct vmxnet3_tx_buf_info *tbi = NULL;
743 
744 	BUG_ON(ctx->copy_size > skb_headlen(skb));
745 
746 	/* use the previous gen bit for the SOP desc */
747 	dw2 = (tq->tx_ring.gen ^ 0x1) << VMXNET3_TXD_GEN_SHIFT;
748 
749 	ctx->sop_txd = tq->tx_ring.base + tq->tx_ring.next2fill;
750 	gdesc = ctx->sop_txd; /* both loops below can be skipped */
751 
752 	/* no need to map the buffer if headers are copied */
753 	if (ctx->copy_size) {
754 		ctx->sop_txd->txd.addr = cpu_to_le64(tq->data_ring.basePA +
755 					tq->tx_ring.next2fill *
756 					tq->txdata_desc_size);
757 		ctx->sop_txd->dword[2] = cpu_to_le32(dw2 | ctx->copy_size);
758 		ctx->sop_txd->dword[3] = 0;
759 
760 		tbi = tq->buf_info + tq->tx_ring.next2fill;
761 		tbi->map_type = VMXNET3_MAP_NONE;
762 
763 		netdev_dbg(adapter->netdev,
764 			"txd[%u]: 0x%Lx 0x%x 0x%x\n",
765 			tq->tx_ring.next2fill,
766 			le64_to_cpu(ctx->sop_txd->txd.addr),
767 			ctx->sop_txd->dword[2], ctx->sop_txd->dword[3]);
768 		vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
769 
770 		/* use the right gen for non-SOP desc */
771 		dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
772 	}
773 
774 	/* linear part can use multiple tx desc if it's big */
775 	len = skb_headlen(skb) - ctx->copy_size;
776 	buf_offset = ctx->copy_size;
777 	while (len) {
778 		u32 buf_size;
779 
780 		if (len < VMXNET3_MAX_TX_BUF_SIZE) {
781 			buf_size = len;
782 			dw2 |= len;
783 		} else {
784 			buf_size = VMXNET3_MAX_TX_BUF_SIZE;
785 			/* spec says that for TxDesc.len, 0 == 2^14 */
786 		}
787 
788 		tbi = tq->buf_info + tq->tx_ring.next2fill;
789 		tbi->map_type = VMXNET3_MAP_SINGLE;
790 		tbi->dma_addr = dma_map_single(&adapter->pdev->dev,
791 				skb->data + buf_offset, buf_size,
792 				DMA_TO_DEVICE);
793 		if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
794 			return -EFAULT;
795 
796 		tbi->len = buf_size;
797 
798 		gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
799 		BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
800 
801 		gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
802 		gdesc->dword[2] = cpu_to_le32(dw2);
803 		gdesc->dword[3] = 0;
804 
805 		netdev_dbg(adapter->netdev,
806 			"txd[%u]: 0x%Lx 0x%x 0x%x\n",
807 			tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
808 			le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
809 		vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
810 		dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
811 
812 		len -= buf_size;
813 		buf_offset += buf_size;
814 	}
815 
816 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
817 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
818 		u32 buf_size;
819 
820 		buf_offset = 0;
821 		len = skb_frag_size(frag);
822 		while (len) {
823 			tbi = tq->buf_info + tq->tx_ring.next2fill;
824 			if (len < VMXNET3_MAX_TX_BUF_SIZE) {
825 				buf_size = len;
826 				dw2 |= len;
827 			} else {
828 				buf_size = VMXNET3_MAX_TX_BUF_SIZE;
829 				/* spec says that for TxDesc.len, 0 == 2^14 */
830 			}
831 			tbi->map_type = VMXNET3_MAP_PAGE;
832 			tbi->dma_addr = skb_frag_dma_map(&adapter->pdev->dev, frag,
833 							 buf_offset, buf_size,
834 							 DMA_TO_DEVICE);
835 			if (dma_mapping_error(&adapter->pdev->dev, tbi->dma_addr))
836 				return -EFAULT;
837 
838 			tbi->len = buf_size;
839 
840 			gdesc = tq->tx_ring.base + tq->tx_ring.next2fill;
841 			BUG_ON(gdesc->txd.gen == tq->tx_ring.gen);
842 
843 			gdesc->txd.addr = cpu_to_le64(tbi->dma_addr);
844 			gdesc->dword[2] = cpu_to_le32(dw2);
845 			gdesc->dword[3] = 0;
846 
847 			netdev_dbg(adapter->netdev,
848 				"txd[%u]: 0x%llx %u %u\n",
849 				tq->tx_ring.next2fill, le64_to_cpu(gdesc->txd.addr),
850 				le32_to_cpu(gdesc->dword[2]), gdesc->dword[3]);
851 			vmxnet3_cmd_ring_adv_next2fill(&tq->tx_ring);
852 			dw2 = tq->tx_ring.gen << VMXNET3_TXD_GEN_SHIFT;
853 
854 			len -= buf_size;
855 			buf_offset += buf_size;
856 		}
857 	}
858 
859 	ctx->eop_txd = gdesc;
860 
861 	/* set the last buf_info for the pkt */
862 	tbi->skb = skb;
863 	tbi->sop_idx = ctx->sop_txd - tq->tx_ring.base;
864 
865 	return 0;
866 }
867 
868 
869 /* Init all tx queues */
870 static void
vmxnet3_tq_init_all(struct vmxnet3_adapter * adapter)871 vmxnet3_tq_init_all(struct vmxnet3_adapter *adapter)
872 {
873 	int i;
874 
875 	for (i = 0; i < adapter->num_tx_queues; i++)
876 		vmxnet3_tq_init(&adapter->tx_queue[i], adapter);
877 }
878 
879 
880 /*
881  *    parse relevant protocol headers:
882  *      For a tso pkt, relevant headers are L2/3/4 including options
883  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
884  *      if it's a TCP/UDP pkt
885  *
886  * Returns:
887  *    -1:  error happens during parsing
888  *     0:  protocol headers parsed, but too big to be copied
889  *     1:  protocol headers parsed and copied
890  *
891  * Other effects:
892  *    1. related *ctx fields are updated.
893  *    2. ctx->copy_size is # of bytes copied
894  *    3. the portion to be copied is guaranteed to be in the linear part
895  *
896  */
897 static int
vmxnet3_parse_hdr(struct sk_buff * skb,struct vmxnet3_tx_queue * tq,struct vmxnet3_tx_ctx * ctx,struct vmxnet3_adapter * adapter)898 vmxnet3_parse_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
899 		  struct vmxnet3_tx_ctx *ctx,
900 		  struct vmxnet3_adapter *adapter)
901 {
902 	u8 protocol = 0;
903 
904 	if (ctx->mss) {	/* TSO */
905 		if (VMXNET3_VERSION_GE_4(adapter) && skb->encapsulation) {
906 			ctx->l4_offset = skb_inner_transport_offset(skb);
907 			ctx->l4_hdr_size = inner_tcp_hdrlen(skb);
908 			ctx->copy_size = ctx->l4_offset + ctx->l4_hdr_size;
909 		} else {
910 			ctx->l4_offset = skb_transport_offset(skb);
911 			ctx->l4_hdr_size = tcp_hdrlen(skb);
912 			ctx->copy_size = ctx->l4_offset + ctx->l4_hdr_size;
913 		}
914 	} else {
915 		if (skb->ip_summed == CHECKSUM_PARTIAL) {
916 			/* For encap packets, skb_checksum_start_offset refers
917 			 * to inner L4 offset. Thus, below works for encap as
918 			 * well as non-encap case
919 			 */
920 			ctx->l4_offset = skb_checksum_start_offset(skb);
921 
922 			if (VMXNET3_VERSION_GE_4(adapter) &&
923 			    skb->encapsulation) {
924 				struct iphdr *iph = inner_ip_hdr(skb);
925 
926 				if (iph->version == 4) {
927 					protocol = iph->protocol;
928 				} else {
929 					const struct ipv6hdr *ipv6h;
930 
931 					ipv6h = inner_ipv6_hdr(skb);
932 					protocol = ipv6h->nexthdr;
933 				}
934 			} else {
935 				if (ctx->ipv4) {
936 					const struct iphdr *iph = ip_hdr(skb);
937 
938 					protocol = iph->protocol;
939 				} else if (ctx->ipv6) {
940 					const struct ipv6hdr *ipv6h;
941 
942 					ipv6h = ipv6_hdr(skb);
943 					protocol = ipv6h->nexthdr;
944 				}
945 			}
946 
947 			switch (protocol) {
948 			case IPPROTO_TCP:
949 				ctx->l4_hdr_size = skb->encapsulation ? inner_tcp_hdrlen(skb) :
950 						   tcp_hdrlen(skb);
951 				break;
952 			case IPPROTO_UDP:
953 				ctx->l4_hdr_size = sizeof(struct udphdr);
954 				break;
955 			default:
956 				ctx->l4_hdr_size = 0;
957 				break;
958 			}
959 
960 			ctx->copy_size = min(ctx->l4_offset +
961 					 ctx->l4_hdr_size, skb->len);
962 		} else {
963 			ctx->l4_offset = 0;
964 			ctx->l4_hdr_size = 0;
965 			/* copy as much as allowed */
966 			ctx->copy_size = min_t(unsigned int,
967 					       tq->txdata_desc_size,
968 					       skb_headlen(skb));
969 		}
970 
971 		if (skb->len <= VMXNET3_HDR_COPY_SIZE)
972 			ctx->copy_size = skb->len;
973 
974 		/* make sure headers are accessible directly */
975 		if (unlikely(!pskb_may_pull(skb, ctx->copy_size)))
976 			goto err;
977 	}
978 
979 	if (unlikely(ctx->copy_size > tq->txdata_desc_size)) {
980 		tq->stats.oversized_hdr++;
981 		ctx->copy_size = 0;
982 		return 0;
983 	}
984 
985 	return 1;
986 err:
987 	return -1;
988 }
989 
990 /*
991  *    copy relevant protocol headers to the transmit ring:
992  *      For a tso pkt, relevant headers are L2/3/4 including options
993  *      For a pkt requesting csum offloading, they are L2/3 and may include L4
994  *      if it's a TCP/UDP pkt
995  *
996  *
997  *    Note that this requires that vmxnet3_parse_hdr be called first to set the
998  *      appropriate bits in ctx first
999  */
1000 static void
vmxnet3_copy_hdr(struct sk_buff * skb,struct vmxnet3_tx_queue * tq,struct vmxnet3_tx_ctx * ctx,struct vmxnet3_adapter * adapter)1001 vmxnet3_copy_hdr(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
1002 		 struct vmxnet3_tx_ctx *ctx,
1003 		 struct vmxnet3_adapter *adapter)
1004 {
1005 	struct Vmxnet3_TxDataDesc *tdd;
1006 
1007 	tdd = (struct Vmxnet3_TxDataDesc *)((u8 *)tq->data_ring.base +
1008 					    tq->tx_ring.next2fill *
1009 					    tq->txdata_desc_size);
1010 
1011 	memcpy(tdd->data, skb->data, ctx->copy_size);
1012 	netdev_dbg(adapter->netdev,
1013 		"copy %u bytes to dataRing[%u]\n",
1014 		ctx->copy_size, tq->tx_ring.next2fill);
1015 }
1016 
1017 
1018 static void
vmxnet3_prepare_inner_tso(struct sk_buff * skb,struct vmxnet3_tx_ctx * ctx)1019 vmxnet3_prepare_inner_tso(struct sk_buff *skb,
1020 			  struct vmxnet3_tx_ctx *ctx)
1021 {
1022 	struct tcphdr *tcph = inner_tcp_hdr(skb);
1023 	struct iphdr *iph = inner_ip_hdr(skb);
1024 
1025 	if (iph->version == 4) {
1026 		iph->check = 0;
1027 		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
1028 						 IPPROTO_TCP, 0);
1029 	} else {
1030 		struct ipv6hdr *iph = inner_ipv6_hdr(skb);
1031 
1032 		tcph->check = ~csum_ipv6_magic(&iph->saddr, &iph->daddr, 0,
1033 					       IPPROTO_TCP, 0);
1034 	}
1035 }
1036 
1037 static void
vmxnet3_prepare_tso(struct sk_buff * skb,struct vmxnet3_tx_ctx * ctx)1038 vmxnet3_prepare_tso(struct sk_buff *skb,
1039 		    struct vmxnet3_tx_ctx *ctx)
1040 {
1041 	struct tcphdr *tcph = tcp_hdr(skb);
1042 
1043 	if (ctx->ipv4) {
1044 		struct iphdr *iph = ip_hdr(skb);
1045 
1046 		iph->check = 0;
1047 		tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, 0,
1048 						 IPPROTO_TCP, 0);
1049 	} else if (ctx->ipv6) {
1050 		tcp_v6_gso_csum_prep(skb);
1051 	}
1052 }
1053 
txd_estimate(const struct sk_buff * skb)1054 static int txd_estimate(const struct sk_buff *skb)
1055 {
1056 	int count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1057 	int i;
1058 
1059 	for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1060 		const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1061 
1062 		count += VMXNET3_TXD_NEEDED(skb_frag_size(frag));
1063 	}
1064 	return count;
1065 }
1066 
1067 /*
1068  * Transmits a pkt thru a given tq
1069  * Returns:
1070  *    NETDEV_TX_OK:      descriptors are setup successfully
1071  *    NETDEV_TX_OK:      error occurred, the pkt is dropped
1072  *    NETDEV_TX_BUSY:    tx ring is full, queue is stopped
1073  *
1074  * Side-effects:
1075  *    1. tx ring may be changed
1076  *    2. tq stats may be updated accordingly
1077  *    3. shared->txNumDeferred may be updated
1078  */
1079 
1080 static int
vmxnet3_tq_xmit(struct sk_buff * skb,struct vmxnet3_tx_queue * tq,struct vmxnet3_adapter * adapter,struct net_device * netdev)1081 vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq,
1082 		struct vmxnet3_adapter *adapter, struct net_device *netdev)
1083 {
1084 	int ret;
1085 	u32 count;
1086 	int num_pkts;
1087 	int tx_num_deferred;
1088 	unsigned long flags;
1089 	struct vmxnet3_tx_ctx ctx;
1090 	union Vmxnet3_GenericDesc *gdesc;
1091 #ifdef __BIG_ENDIAN_BITFIELD
1092 	/* Use temporary descriptor to avoid touching bits multiple times */
1093 	union Vmxnet3_GenericDesc tempTxDesc;
1094 #endif
1095 
1096 	count = txd_estimate(skb);
1097 
1098 	ctx.ipv4 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IP));
1099 	ctx.ipv6 = (vlan_get_protocol(skb) == cpu_to_be16(ETH_P_IPV6));
1100 
1101 	ctx.mss = skb_shinfo(skb)->gso_size;
1102 	if (ctx.mss) {
1103 		if (skb_header_cloned(skb)) {
1104 			if (unlikely(pskb_expand_head(skb, 0, 0,
1105 						      GFP_ATOMIC) != 0)) {
1106 				tq->stats.drop_tso++;
1107 				goto drop_pkt;
1108 			}
1109 			tq->stats.copy_skb_header++;
1110 		}
1111 		if (unlikely(count > VMXNET3_MAX_TSO_TXD_PER_PKT)) {
1112 			/* tso pkts must not use more than
1113 			 * VMXNET3_MAX_TSO_TXD_PER_PKT entries
1114 			 */
1115 			if (skb_linearize(skb) != 0) {
1116 				tq->stats.drop_too_many_frags++;
1117 				goto drop_pkt;
1118 			}
1119 			tq->stats.linearized++;
1120 
1121 			/* recalculate the # of descriptors to use */
1122 			count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1123 			if (unlikely(count > VMXNET3_MAX_TSO_TXD_PER_PKT)) {
1124 				tq->stats.drop_too_many_frags++;
1125 				goto drop_pkt;
1126 			}
1127 		}
1128 		if (skb->encapsulation) {
1129 			vmxnet3_prepare_inner_tso(skb, &ctx);
1130 		} else {
1131 			vmxnet3_prepare_tso(skb, &ctx);
1132 		}
1133 	} else {
1134 		if (unlikely(count > VMXNET3_MAX_TXD_PER_PKT)) {
1135 
1136 			/* non-tso pkts must not use more than
1137 			 * VMXNET3_MAX_TXD_PER_PKT entries
1138 			 */
1139 			if (skb_linearize(skb) != 0) {
1140 				tq->stats.drop_too_many_frags++;
1141 				goto drop_pkt;
1142 			}
1143 			tq->stats.linearized++;
1144 
1145 			/* recalculate the # of descriptors to use */
1146 			count = VMXNET3_TXD_NEEDED(skb_headlen(skb)) + 1;
1147 		}
1148 	}
1149 
1150 	ret = vmxnet3_parse_hdr(skb, tq, &ctx, adapter);
1151 	if (ret >= 0) {
1152 		BUG_ON(ret <= 0 && ctx.copy_size != 0);
1153 		/* hdrs parsed, check against other limits */
1154 		if (ctx.mss) {
1155 			if (unlikely(ctx.l4_offset + ctx.l4_hdr_size >
1156 				     VMXNET3_MAX_TX_BUF_SIZE)) {
1157 				tq->stats.drop_oversized_hdr++;
1158 				goto drop_pkt;
1159 			}
1160 		} else {
1161 			if (skb->ip_summed == CHECKSUM_PARTIAL) {
1162 				if (unlikely(ctx.l4_offset +
1163 					     skb->csum_offset >
1164 					     VMXNET3_MAX_CSUM_OFFSET)) {
1165 					tq->stats.drop_oversized_hdr++;
1166 					goto drop_pkt;
1167 				}
1168 			}
1169 		}
1170 	} else {
1171 		tq->stats.drop_hdr_inspect_err++;
1172 		goto drop_pkt;
1173 	}
1174 
1175 	spin_lock_irqsave(&tq->tx_lock, flags);
1176 
1177 	if (count > vmxnet3_cmd_ring_desc_avail(&tq->tx_ring)) {
1178 		tq->stats.tx_ring_full++;
1179 		netdev_dbg(adapter->netdev,
1180 			"tx queue stopped on %s, next2comp %u"
1181 			" next2fill %u\n", adapter->netdev->name,
1182 			tq->tx_ring.next2comp, tq->tx_ring.next2fill);
1183 
1184 		vmxnet3_tq_stop(tq, adapter);
1185 		spin_unlock_irqrestore(&tq->tx_lock, flags);
1186 		return NETDEV_TX_BUSY;
1187 	}
1188 
1189 
1190 	vmxnet3_copy_hdr(skb, tq, &ctx, adapter);
1191 
1192 	/* fill tx descs related to addr & len */
1193 	if (vmxnet3_map_pkt(skb, &ctx, tq, adapter->pdev, adapter))
1194 		goto unlock_drop_pkt;
1195 
1196 	/* setup the EOP desc */
1197 	ctx.eop_txd->dword[3] = cpu_to_le32(VMXNET3_TXD_CQ | VMXNET3_TXD_EOP);
1198 
1199 	/* setup the SOP desc */
1200 #ifdef __BIG_ENDIAN_BITFIELD
1201 	gdesc = &tempTxDesc;
1202 	gdesc->dword[2] = ctx.sop_txd->dword[2];
1203 	gdesc->dword[3] = ctx.sop_txd->dword[3];
1204 #else
1205 	gdesc = ctx.sop_txd;
1206 #endif
1207 	tx_num_deferred = le32_to_cpu(tq->shared->txNumDeferred);
1208 	if (ctx.mss) {
1209 		if (VMXNET3_VERSION_GE_4(adapter) && skb->encapsulation) {
1210 			gdesc->txd.hlen = ctx.l4_offset + ctx.l4_hdr_size;
1211 			if (VMXNET3_VERSION_GE_7(adapter)) {
1212 				gdesc->txd.om = VMXNET3_OM_TSO;
1213 				gdesc->txd.ext1 = 1;
1214 			} else {
1215 				gdesc->txd.om = VMXNET3_OM_ENCAP;
1216 			}
1217 			gdesc->txd.msscof = ctx.mss;
1218 
1219 			if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_TUNNEL_CSUM)
1220 				gdesc->txd.oco = 1;
1221 		} else {
1222 			gdesc->txd.hlen = ctx.l4_offset + ctx.l4_hdr_size;
1223 			gdesc->txd.om = VMXNET3_OM_TSO;
1224 			gdesc->txd.msscof = ctx.mss;
1225 		}
1226 		num_pkts = (skb->len - gdesc->txd.hlen + ctx.mss - 1) / ctx.mss;
1227 	} else {
1228 		if (skb->ip_summed == CHECKSUM_PARTIAL) {
1229 			if (VMXNET3_VERSION_GE_4(adapter) &&
1230 			    skb->encapsulation) {
1231 				gdesc->txd.hlen = ctx.l4_offset +
1232 						  ctx.l4_hdr_size;
1233 				if (VMXNET3_VERSION_GE_7(adapter)) {
1234 					gdesc->txd.om = VMXNET3_OM_CSUM;
1235 					gdesc->txd.msscof = ctx.l4_offset +
1236 							    skb->csum_offset;
1237 					gdesc->txd.ext1 = 1;
1238 				} else {
1239 					gdesc->txd.om = VMXNET3_OM_ENCAP;
1240 					gdesc->txd.msscof = 0;		/* Reserved */
1241 				}
1242 			} else {
1243 				gdesc->txd.hlen = ctx.l4_offset;
1244 				gdesc->txd.om = VMXNET3_OM_CSUM;
1245 				gdesc->txd.msscof = ctx.l4_offset +
1246 						    skb->csum_offset;
1247 			}
1248 		} else {
1249 			gdesc->txd.om = 0;
1250 			gdesc->txd.msscof = 0;
1251 		}
1252 		num_pkts = 1;
1253 	}
1254 	le32_add_cpu(&tq->shared->txNumDeferred, num_pkts);
1255 	tx_num_deferred += num_pkts;
1256 
1257 	if (skb_vlan_tag_present(skb)) {
1258 		gdesc->txd.ti = 1;
1259 		gdesc->txd.tci = skb_vlan_tag_get(skb);
1260 	}
1261 
1262 	/* Ensure that the write to (&gdesc->txd)->gen will be observed after
1263 	 * all other writes to &gdesc->txd.
1264 	 */
1265 	dma_wmb();
1266 
1267 	/* finally flips the GEN bit of the SOP desc. */
1268 	gdesc->dword[2] = cpu_to_le32(le32_to_cpu(gdesc->dword[2]) ^
1269 						  VMXNET3_TXD_GEN);
1270 #ifdef __BIG_ENDIAN_BITFIELD
1271 	/* Finished updating in bitfields of Tx Desc, so write them in original
1272 	 * place.
1273 	 */
1274 	vmxnet3_TxDescToLe((struct Vmxnet3_TxDesc *)gdesc,
1275 			   (struct Vmxnet3_TxDesc *)ctx.sop_txd);
1276 	gdesc = ctx.sop_txd;
1277 #endif
1278 	netdev_dbg(adapter->netdev,
1279 		"txd[%u]: SOP 0x%Lx 0x%x 0x%x\n",
1280 		(u32)(ctx.sop_txd -
1281 		tq->tx_ring.base), le64_to_cpu(gdesc->txd.addr),
1282 		le32_to_cpu(gdesc->dword[2]), le32_to_cpu(gdesc->dword[3]));
1283 
1284 	spin_unlock_irqrestore(&tq->tx_lock, flags);
1285 
1286 	if (tx_num_deferred >= le32_to_cpu(tq->shared->txThreshold)) {
1287 		tq->shared->txNumDeferred = 0;
1288 		VMXNET3_WRITE_BAR0_REG(adapter,
1289 				       adapter->tx_prod_offset + tq->qid * 8,
1290 				       tq->tx_ring.next2fill);
1291 	}
1292 
1293 	return NETDEV_TX_OK;
1294 
1295 unlock_drop_pkt:
1296 	spin_unlock_irqrestore(&tq->tx_lock, flags);
1297 drop_pkt:
1298 	tq->stats.drop_total++;
1299 	dev_kfree_skb_any(skb);
1300 	return NETDEV_TX_OK;
1301 }
1302 
1303 static int
vmxnet3_create_pp(struct vmxnet3_adapter * adapter,struct vmxnet3_rx_queue * rq,int size)1304 vmxnet3_create_pp(struct vmxnet3_adapter *adapter,
1305 		  struct vmxnet3_rx_queue *rq, int size)
1306 {
1307 	bool xdp_prog = vmxnet3_xdp_enabled(adapter);
1308 	const struct page_pool_params pp_params = {
1309 		.order = 0,
1310 		.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
1311 		.pool_size = size,
1312 		.nid = NUMA_NO_NODE,
1313 		.dev = &adapter->pdev->dev,
1314 		.offset = VMXNET3_XDP_RX_OFFSET,
1315 		.max_len = VMXNET3_XDP_MAX_FRSIZE,
1316 		.dma_dir = xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE,
1317 	};
1318 	struct page_pool *pp;
1319 	int err;
1320 
1321 	pp = page_pool_create(&pp_params);
1322 	if (IS_ERR(pp))
1323 		return PTR_ERR(pp);
1324 
1325 	err = xdp_rxq_info_reg(&rq->xdp_rxq, adapter->netdev, rq->qid,
1326 			       rq->napi.napi_id);
1327 	if (err < 0)
1328 		goto err_free_pp;
1329 
1330 	err = xdp_rxq_info_reg_mem_model(&rq->xdp_rxq, MEM_TYPE_PAGE_POOL, pp);
1331 	if (err)
1332 		goto err_unregister_rxq;
1333 
1334 	rq->page_pool = pp;
1335 
1336 	return 0;
1337 
1338 err_unregister_rxq:
1339 	xdp_rxq_info_unreg(&rq->xdp_rxq);
1340 err_free_pp:
1341 	page_pool_destroy(pp);
1342 
1343 	return err;
1344 }
1345 
1346 void *
vmxnet3_pp_get_buff(struct page_pool * pp,dma_addr_t * dma_addr,gfp_t gfp_mask)1347 vmxnet3_pp_get_buff(struct page_pool *pp, dma_addr_t *dma_addr,
1348 		    gfp_t gfp_mask)
1349 {
1350 	struct page *page;
1351 
1352 	page = page_pool_alloc_pages(pp, gfp_mask | __GFP_NOWARN);
1353 	if (unlikely(!page))
1354 		return NULL;
1355 
1356 	*dma_addr = page_pool_get_dma_addr(page) + pp->p.offset;
1357 
1358 	return page_address(page);
1359 }
1360 
1361 static netdev_tx_t
vmxnet3_xmit_frame(struct sk_buff * skb,struct net_device * netdev)1362 vmxnet3_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
1363 {
1364 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
1365 
1366 	BUG_ON(skb->queue_mapping > adapter->num_tx_queues);
1367 	return vmxnet3_tq_xmit(skb,
1368 			       &adapter->tx_queue[skb->queue_mapping],
1369 			       adapter, netdev);
1370 }
1371 
1372 
1373 static void
vmxnet3_rx_csum(struct vmxnet3_adapter * adapter,struct sk_buff * skb,union Vmxnet3_GenericDesc * gdesc)1374 vmxnet3_rx_csum(struct vmxnet3_adapter *adapter,
1375 		struct sk_buff *skb,
1376 		union Vmxnet3_GenericDesc *gdesc)
1377 {
1378 	if (!gdesc->rcd.cnc && adapter->netdev->features & NETIF_F_RXCSUM) {
1379 		if (gdesc->rcd.v4 &&
1380 		    (le32_to_cpu(gdesc->dword[3]) &
1381 		     VMXNET3_RCD_CSUM_OK) == VMXNET3_RCD_CSUM_OK) {
1382 			skb->ip_summed = CHECKSUM_UNNECESSARY;
1383 			if ((le32_to_cpu(gdesc->dword[0]) &
1384 				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))) {
1385 				skb->csum_level = 1;
1386 			}
1387 			WARN_ON_ONCE(!(gdesc->rcd.tcp || gdesc->rcd.udp) &&
1388 				     !(le32_to_cpu(gdesc->dword[0]) &
1389 				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
1390 			WARN_ON_ONCE(gdesc->rcd.frg &&
1391 				     !(le32_to_cpu(gdesc->dword[0]) &
1392 				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
1393 		} else if (gdesc->rcd.v6 && (le32_to_cpu(gdesc->dword[3]) &
1394 					     (1 << VMXNET3_RCD_TUC_SHIFT))) {
1395 			skb->ip_summed = CHECKSUM_UNNECESSARY;
1396 			if ((le32_to_cpu(gdesc->dword[0]) &
1397 				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT))) {
1398 				skb->csum_level = 1;
1399 			}
1400 			WARN_ON_ONCE(!(gdesc->rcd.tcp || gdesc->rcd.udp) &&
1401 				     !(le32_to_cpu(gdesc->dword[0]) &
1402 				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
1403 			WARN_ON_ONCE(gdesc->rcd.frg &&
1404 				     !(le32_to_cpu(gdesc->dword[0]) &
1405 				     (1UL << VMXNET3_RCD_HDR_INNER_SHIFT)));
1406 		} else {
1407 			if (gdesc->rcd.csum) {
1408 				skb->csum = htons(gdesc->rcd.csum);
1409 				skb->ip_summed = CHECKSUM_PARTIAL;
1410 			} else {
1411 				skb_checksum_none_assert(skb);
1412 			}
1413 		}
1414 	} else {
1415 		skb_checksum_none_assert(skb);
1416 	}
1417 }
1418 
1419 
1420 static void
vmxnet3_rx_error(struct vmxnet3_rx_queue * rq,struct Vmxnet3_RxCompDesc * rcd,struct vmxnet3_rx_ctx * ctx,struct vmxnet3_adapter * adapter)1421 vmxnet3_rx_error(struct vmxnet3_rx_queue *rq, struct Vmxnet3_RxCompDesc *rcd,
1422 		 struct vmxnet3_rx_ctx *ctx,  struct vmxnet3_adapter *adapter)
1423 {
1424 	rq->stats.drop_err++;
1425 	if (!rcd->fcs)
1426 		rq->stats.drop_fcs++;
1427 
1428 	rq->stats.drop_total++;
1429 
1430 	/*
1431 	 * We do not unmap and chain the rx buffer to the skb.
1432 	 * We basically pretend this buffer is not used and will be recycled
1433 	 * by vmxnet3_rq_alloc_rx_buf()
1434 	 */
1435 
1436 	/*
1437 	 * ctx->skb may be NULL if this is the first and the only one
1438 	 * desc for the pkt
1439 	 */
1440 	if (ctx->skb)
1441 		dev_kfree_skb_irq(ctx->skb);
1442 
1443 	ctx->skb = NULL;
1444 }
1445 
1446 
1447 static u32
vmxnet3_get_hdr_len(struct vmxnet3_adapter * adapter,struct sk_buff * skb,union Vmxnet3_GenericDesc * gdesc)1448 vmxnet3_get_hdr_len(struct vmxnet3_adapter *adapter, struct sk_buff *skb,
1449 		    union Vmxnet3_GenericDesc *gdesc)
1450 {
1451 	u32 hlen, maplen;
1452 	union {
1453 		void *ptr;
1454 		struct ethhdr *eth;
1455 		struct vlan_ethhdr *veth;
1456 		struct iphdr *ipv4;
1457 		struct ipv6hdr *ipv6;
1458 		struct tcphdr *tcp;
1459 	} hdr;
1460 	BUG_ON(gdesc->rcd.tcp == 0);
1461 
1462 	maplen = skb_headlen(skb);
1463 	if (unlikely(sizeof(struct iphdr) + sizeof(struct tcphdr) > maplen))
1464 		return 0;
1465 
1466 	if (skb->protocol == cpu_to_be16(ETH_P_8021Q) ||
1467 	    skb->protocol == cpu_to_be16(ETH_P_8021AD))
1468 		hlen = sizeof(struct vlan_ethhdr);
1469 	else
1470 		hlen = sizeof(struct ethhdr);
1471 
1472 	hdr.eth = eth_hdr(skb);
1473 	if (gdesc->rcd.v4) {
1474 		BUG_ON(hdr.eth->h_proto != htons(ETH_P_IP) &&
1475 		       hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IP));
1476 		hdr.ptr += hlen;
1477 		BUG_ON(hdr.ipv4->protocol != IPPROTO_TCP);
1478 		hlen = hdr.ipv4->ihl << 2;
1479 		hdr.ptr += hdr.ipv4->ihl << 2;
1480 	} else if (gdesc->rcd.v6) {
1481 		BUG_ON(hdr.eth->h_proto != htons(ETH_P_IPV6) &&
1482 		       hdr.veth->h_vlan_encapsulated_proto != htons(ETH_P_IPV6));
1483 		hdr.ptr += hlen;
1484 		/* Use an estimated value, since we also need to handle
1485 		 * TSO case.
1486 		 */
1487 		if (hdr.ipv6->nexthdr != IPPROTO_TCP)
1488 			return sizeof(struct ipv6hdr) + sizeof(struct tcphdr);
1489 		hlen = sizeof(struct ipv6hdr);
1490 		hdr.ptr += sizeof(struct ipv6hdr);
1491 	} else {
1492 		/* Non-IP pkt, dont estimate header length */
1493 		return 0;
1494 	}
1495 
1496 	if (hlen + sizeof(struct tcphdr) > maplen)
1497 		return 0;
1498 
1499 	return (hlen + (hdr.tcp->doff << 2));
1500 }
1501 
1502 static int
vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue * rq,struct vmxnet3_adapter * adapter,int quota)1503 vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq,
1504 		       struct vmxnet3_adapter *adapter, int quota)
1505 {
1506 	u32 rxprod_reg[2] = {
1507 		adapter->rx_prod_offset, adapter->rx_prod2_offset
1508 	};
1509 	u32 num_pkts = 0;
1510 	bool skip_page_frags = false;
1511 	bool encap_lro = false;
1512 	struct Vmxnet3_RxCompDesc *rcd;
1513 	struct vmxnet3_rx_ctx *ctx = &rq->rx_ctx;
1514 	u16 segCnt = 0, mss = 0;
1515 	int comp_offset, fill_offset;
1516 #ifdef __BIG_ENDIAN_BITFIELD
1517 	struct Vmxnet3_RxDesc rxCmdDesc;
1518 	struct Vmxnet3_RxCompDesc rxComp;
1519 #endif
1520 	bool need_flush = false;
1521 
1522 	vmxnet3_getRxComp(rcd, &rq->comp_ring.base[rq->comp_ring.next2proc].rcd,
1523 			  &rxComp);
1524 	while (rcd->gen == rq->comp_ring.gen) {
1525 		struct vmxnet3_rx_buf_info *rbi;
1526 		struct sk_buff *skb, *new_skb = NULL;
1527 		struct page *new_page = NULL;
1528 		dma_addr_t new_dma_addr;
1529 		int num_to_alloc;
1530 		struct Vmxnet3_RxDesc *rxd;
1531 		u32 idx, ring_idx;
1532 		struct vmxnet3_cmd_ring	*ring = NULL;
1533 		if (num_pkts >= quota) {
1534 			/* we may stop even before we see the EOP desc of
1535 			 * the current pkt
1536 			 */
1537 			break;
1538 		}
1539 
1540 		/* Prevent any rcd field from being (speculatively) read before
1541 		 * rcd->gen is read.
1542 		 */
1543 		dma_rmb();
1544 
1545 		BUG_ON(rcd->rqID != rq->qid && rcd->rqID != rq->qid2 &&
1546 		       rcd->rqID != rq->dataRingQid);
1547 		idx = rcd->rxdIdx;
1548 		ring_idx = VMXNET3_GET_RING_IDX(adapter, rcd->rqID);
1549 		ring = rq->rx_ring + ring_idx;
1550 		vmxnet3_getRxDesc(rxd, &rq->rx_ring[ring_idx].base[idx].rxd,
1551 				  &rxCmdDesc);
1552 		rbi = rq->buf_info[ring_idx] + idx;
1553 
1554 		BUG_ON(rxd->addr != rbi->dma_addr ||
1555 		       rxd->len != rbi->len);
1556 
1557 		if (unlikely(rcd->eop && rcd->err)) {
1558 			vmxnet3_rx_error(rq, rcd, ctx, adapter);
1559 			goto rcd_done;
1560 		}
1561 
1562 		if (rcd->sop && rcd->eop && vmxnet3_xdp_enabled(adapter)) {
1563 			struct sk_buff *skb_xdp_pass;
1564 			int act;
1565 
1566 			if (VMXNET3_RX_DATA_RING(adapter, rcd->rqID)) {
1567 				ctx->skb = NULL;
1568 				goto skip_xdp; /* Handle it later. */
1569 			}
1570 
1571 			if (rbi->buf_type != VMXNET3_RX_BUF_XDP)
1572 				goto rcd_done;
1573 
1574 			act = vmxnet3_process_xdp(adapter, rq, rcd, rbi, rxd,
1575 						  &skb_xdp_pass);
1576 			if (act == XDP_PASS) {
1577 				ctx->skb = skb_xdp_pass;
1578 				goto sop_done;
1579 			}
1580 			ctx->skb = NULL;
1581 			need_flush |= act == XDP_REDIRECT;
1582 
1583 			goto rcd_done;
1584 		}
1585 skip_xdp:
1586 
1587 		if (rcd->sop) { /* first buf of the pkt */
1588 			bool rxDataRingUsed;
1589 			u16 len;
1590 
1591 			BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_HEAD ||
1592 			       (rcd->rqID != rq->qid &&
1593 				rcd->rqID != rq->dataRingQid));
1594 
1595 			BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_SKB &&
1596 			       rbi->buf_type != VMXNET3_RX_BUF_XDP);
1597 			BUG_ON(ctx->skb != NULL || rbi->skb == NULL);
1598 
1599 			if (unlikely(rcd->len == 0)) {
1600 				/* Pretend the rx buffer is skipped. */
1601 				BUG_ON(!(rcd->sop && rcd->eop));
1602 				netdev_dbg(adapter->netdev,
1603 					"rxRing[%u][%u] 0 length\n",
1604 					ring_idx, idx);
1605 				goto rcd_done;
1606 			}
1607 
1608 			skip_page_frags = false;
1609 			ctx->skb = rbi->skb;
1610 
1611 			rxDataRingUsed =
1612 				VMXNET3_RX_DATA_RING(adapter, rcd->rqID);
1613 			len = rxDataRingUsed ? rcd->len : rbi->len;
1614 
1615 			if (rxDataRingUsed && vmxnet3_xdp_enabled(adapter)) {
1616 				struct sk_buff *skb_xdp_pass;
1617 				size_t sz;
1618 				int act;
1619 
1620 				sz = rcd->rxdIdx * rq->data_ring.desc_size;
1621 				act = vmxnet3_process_xdp_small(adapter, rq,
1622 								&rq->data_ring.base[sz],
1623 								rcd->len,
1624 								&skb_xdp_pass);
1625 				if (act == XDP_PASS) {
1626 					ctx->skb = skb_xdp_pass;
1627 					goto sop_done;
1628 				}
1629 				need_flush |= act == XDP_REDIRECT;
1630 
1631 				goto rcd_done;
1632 			}
1633 			new_skb = netdev_alloc_skb_ip_align(adapter->netdev,
1634 							    len);
1635 			if (new_skb == NULL) {
1636 				/* Skb allocation failed, do not handover this
1637 				 * skb to stack. Reuse it. Drop the existing pkt
1638 				 */
1639 				rq->stats.rx_buf_alloc_failure++;
1640 				ctx->skb = NULL;
1641 				rq->stats.drop_total++;
1642 				skip_page_frags = true;
1643 				goto rcd_done;
1644 			}
1645 
1646 			if (rxDataRingUsed && adapter->rxdataring_enabled) {
1647 				size_t sz;
1648 
1649 				BUG_ON(rcd->len > rq->data_ring.desc_size);
1650 
1651 				ctx->skb = new_skb;
1652 				sz = rcd->rxdIdx * rq->data_ring.desc_size;
1653 				memcpy(new_skb->data,
1654 				       &rq->data_ring.base[sz], rcd->len);
1655 			} else {
1656 				ctx->skb = rbi->skb;
1657 
1658 				new_dma_addr =
1659 					dma_map_single(&adapter->pdev->dev,
1660 						       new_skb->data, rbi->len,
1661 						       DMA_FROM_DEVICE);
1662 				if (dma_mapping_error(&adapter->pdev->dev,
1663 						      new_dma_addr)) {
1664 					dev_kfree_skb(new_skb);
1665 					/* Skb allocation failed, do not
1666 					 * handover this skb to stack. Reuse
1667 					 * it. Drop the existing pkt.
1668 					 */
1669 					rq->stats.rx_buf_alloc_failure++;
1670 					ctx->skb = NULL;
1671 					rq->stats.drop_total++;
1672 					skip_page_frags = true;
1673 					goto rcd_done;
1674 				}
1675 
1676 				dma_unmap_single(&adapter->pdev->dev,
1677 						 rbi->dma_addr,
1678 						 rbi->len,
1679 						 DMA_FROM_DEVICE);
1680 
1681 				/* Immediate refill */
1682 				rbi->skb = new_skb;
1683 				rbi->dma_addr = new_dma_addr;
1684 				rxd->addr = cpu_to_le64(rbi->dma_addr);
1685 				rxd->len = rbi->len;
1686 			}
1687 
1688 			skb_record_rx_queue(ctx->skb, rq->qid);
1689 			skb_put(ctx->skb, rcd->len);
1690 
1691 			if (VMXNET3_VERSION_GE_2(adapter) &&
1692 			    rcd->type == VMXNET3_CDTYPE_RXCOMP_LRO) {
1693 				struct Vmxnet3_RxCompDescExt *rcdlro;
1694 				union Vmxnet3_GenericDesc *gdesc;
1695 
1696 				rcdlro = (struct Vmxnet3_RxCompDescExt *)rcd;
1697 				gdesc = (union Vmxnet3_GenericDesc *)rcd;
1698 
1699 				segCnt = rcdlro->segCnt;
1700 				WARN_ON_ONCE(segCnt == 0);
1701 				mss = rcdlro->mss;
1702 				if (unlikely(segCnt <= 1))
1703 					segCnt = 0;
1704 				encap_lro = (le32_to_cpu(gdesc->dword[0]) &
1705 					(1UL << VMXNET3_RCD_HDR_INNER_SHIFT));
1706 			} else {
1707 				segCnt = 0;
1708 			}
1709 		} else {
1710 			BUG_ON(ctx->skb == NULL && !skip_page_frags);
1711 
1712 			/* non SOP buffer must be type 1 in most cases */
1713 			BUG_ON(rbi->buf_type != VMXNET3_RX_BUF_PAGE);
1714 			BUG_ON(rxd->btype != VMXNET3_RXD_BTYPE_BODY);
1715 
1716 			/* If an sop buffer was dropped, skip all
1717 			 * following non-sop fragments. They will be reused.
1718 			 */
1719 			if (skip_page_frags)
1720 				goto rcd_done;
1721 
1722 			if (rcd->len) {
1723 				new_page = alloc_page(GFP_ATOMIC);
1724 				/* Replacement page frag could not be allocated.
1725 				 * Reuse this page. Drop the pkt and free the
1726 				 * skb which contained this page as a frag. Skip
1727 				 * processing all the following non-sop frags.
1728 				 */
1729 				if (unlikely(!new_page)) {
1730 					rq->stats.rx_buf_alloc_failure++;
1731 					dev_kfree_skb(ctx->skb);
1732 					ctx->skb = NULL;
1733 					skip_page_frags = true;
1734 					goto rcd_done;
1735 				}
1736 				new_dma_addr = dma_map_page(&adapter->pdev->dev,
1737 							    new_page,
1738 							    0, PAGE_SIZE,
1739 							    DMA_FROM_DEVICE);
1740 				if (dma_mapping_error(&adapter->pdev->dev,
1741 						      new_dma_addr)) {
1742 					put_page(new_page);
1743 					rq->stats.rx_buf_alloc_failure++;
1744 					dev_kfree_skb(ctx->skb);
1745 					ctx->skb = NULL;
1746 					skip_page_frags = true;
1747 					goto rcd_done;
1748 				}
1749 
1750 				dma_unmap_page(&adapter->pdev->dev,
1751 					       rbi->dma_addr, rbi->len,
1752 					       DMA_FROM_DEVICE);
1753 
1754 				vmxnet3_append_frag(ctx->skb, rcd, rbi);
1755 
1756 				/* Immediate refill */
1757 				rbi->page = new_page;
1758 				rbi->dma_addr = new_dma_addr;
1759 				rxd->addr = cpu_to_le64(rbi->dma_addr);
1760 				rxd->len = rbi->len;
1761 			}
1762 		}
1763 
1764 
1765 sop_done:
1766 		skb = ctx->skb;
1767 		if (rcd->eop) {
1768 			u32 mtu = adapter->netdev->mtu;
1769 			skb->len += skb->data_len;
1770 
1771 #ifdef VMXNET3_RSS
1772 			if (rcd->rssType != VMXNET3_RCD_RSS_TYPE_NONE &&
1773 			    (adapter->netdev->features & NETIF_F_RXHASH)) {
1774 				enum pkt_hash_types hash_type;
1775 
1776 				switch (rcd->rssType) {
1777 				case VMXNET3_RCD_RSS_TYPE_IPV4:
1778 				case VMXNET3_RCD_RSS_TYPE_IPV6:
1779 					hash_type = PKT_HASH_TYPE_L3;
1780 					break;
1781 				case VMXNET3_RCD_RSS_TYPE_TCPIPV4:
1782 				case VMXNET3_RCD_RSS_TYPE_TCPIPV6:
1783 				case VMXNET3_RCD_RSS_TYPE_UDPIPV4:
1784 				case VMXNET3_RCD_RSS_TYPE_UDPIPV6:
1785 					hash_type = PKT_HASH_TYPE_L4;
1786 					break;
1787 				default:
1788 					hash_type = PKT_HASH_TYPE_L3;
1789 					break;
1790 				}
1791 				skb_set_hash(skb,
1792 					     le32_to_cpu(rcd->rssHash),
1793 					     hash_type);
1794 			}
1795 #endif
1796 			vmxnet3_rx_csum(adapter, skb,
1797 					(union Vmxnet3_GenericDesc *)rcd);
1798 			skb->protocol = eth_type_trans(skb, adapter->netdev);
1799 			if ((!rcd->tcp && !encap_lro) ||
1800 			    !(adapter->netdev->features & NETIF_F_LRO))
1801 				goto not_lro;
1802 
1803 			if (segCnt != 0 && mss != 0) {
1804 				skb_shinfo(skb)->gso_type = rcd->v4 ?
1805 					SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1806 				skb_shinfo(skb)->gso_size = mss;
1807 				skb_shinfo(skb)->gso_segs = segCnt;
1808 			} else if ((segCnt != 0 || skb->len > mtu) && !encap_lro) {
1809 				u32 hlen;
1810 
1811 				hlen = vmxnet3_get_hdr_len(adapter, skb,
1812 					(union Vmxnet3_GenericDesc *)rcd);
1813 				if (hlen == 0)
1814 					goto not_lro;
1815 
1816 				skb_shinfo(skb)->gso_type =
1817 					rcd->v4 ? SKB_GSO_TCPV4 : SKB_GSO_TCPV6;
1818 				if (segCnt != 0) {
1819 					skb_shinfo(skb)->gso_segs = segCnt;
1820 					skb_shinfo(skb)->gso_size =
1821 						DIV_ROUND_UP(skb->len -
1822 							hlen, segCnt);
1823 				} else {
1824 					skb_shinfo(skb)->gso_size = mtu - hlen;
1825 				}
1826 			}
1827 not_lro:
1828 			if (unlikely(rcd->ts))
1829 				__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), rcd->tci);
1830 
1831 			/* Use GRO callback if UPT is enabled */
1832 			if ((adapter->netdev->features & NETIF_F_LRO) &&
1833 			    !rq->shared->updateRxProd)
1834 				netif_receive_skb(skb);
1835 			else
1836 				napi_gro_receive(&rq->napi, skb);
1837 
1838 			ctx->skb = NULL;
1839 			encap_lro = false;
1840 			num_pkts++;
1841 		}
1842 
1843 rcd_done:
1844 		/* device may have skipped some rx descs */
1845 		ring = rq->rx_ring + ring_idx;
1846 		rbi->comp_state = VMXNET3_RXD_COMP_DONE;
1847 
1848 		comp_offset = vmxnet3_cmd_ring_desc_avail(ring);
1849 		fill_offset = (idx > ring->next2fill ? 0 : ring->size) +
1850 			      idx - ring->next2fill - 1;
1851 		if (!ring->isOutOfOrder || fill_offset >= comp_offset)
1852 			ring->next2comp = idx;
1853 		num_to_alloc = vmxnet3_cmd_ring_desc_avail(ring);
1854 
1855 		/* Ensure that the writes to rxd->gen bits will be observed
1856 		 * after all other writes to rxd objects.
1857 		 */
1858 		dma_wmb();
1859 
1860 		while (num_to_alloc) {
1861 			rbi = rq->buf_info[ring_idx] + ring->next2fill;
1862 			if (!(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_OOORX_COMP)))
1863 				goto refill_buf;
1864 			if (ring_idx == 0) {
1865 				/* ring0 Type1 buffers can get skipped; re-fill them */
1866 				if (rbi->buf_type != VMXNET3_RX_BUF_SKB)
1867 					goto refill_buf;
1868 			}
1869 			if (rbi->comp_state == VMXNET3_RXD_COMP_DONE) {
1870 refill_buf:
1871 				vmxnet3_getRxDesc(rxd, &ring->base[ring->next2fill].rxd,
1872 						  &rxCmdDesc);
1873 				WARN_ON(!rxd->addr);
1874 
1875 				/* Recv desc is ready to be used by the device */
1876 				rxd->gen = ring->gen;
1877 				vmxnet3_cmd_ring_adv_next2fill(ring);
1878 				rbi->comp_state = VMXNET3_RXD_COMP_PENDING;
1879 				num_to_alloc--;
1880 			} else {
1881 				/* rx completion hasn't occurred */
1882 				ring->isOutOfOrder = 1;
1883 				break;
1884 			}
1885 		}
1886 
1887 		if (num_to_alloc == 0) {
1888 			ring->isOutOfOrder = 0;
1889 		}
1890 
1891 		/* if needed, update the register */
1892 		if (unlikely(rq->shared->updateRxProd) && (ring->next2fill & 0xf) == 0) {
1893 			VMXNET3_WRITE_BAR0_REG(adapter,
1894 					       rxprod_reg[ring_idx] + rq->qid * 8,
1895 					       ring->next2fill);
1896 		}
1897 
1898 		vmxnet3_comp_ring_adv_next2proc(&rq->comp_ring);
1899 		vmxnet3_getRxComp(rcd,
1900 				  &rq->comp_ring.base[rq->comp_ring.next2proc].rcd, &rxComp);
1901 	}
1902 	if (need_flush)
1903 		xdp_do_flush();
1904 
1905 	return num_pkts;
1906 }
1907 
1908 
1909 static void
vmxnet3_rq_cleanup(struct vmxnet3_rx_queue * rq,struct vmxnet3_adapter * adapter)1910 vmxnet3_rq_cleanup(struct vmxnet3_rx_queue *rq,
1911 		   struct vmxnet3_adapter *adapter)
1912 {
1913 	u32 i, ring_idx;
1914 	struct Vmxnet3_RxDesc *rxd;
1915 
1916 	/* ring has already been cleaned up */
1917 	if (!rq->rx_ring[0].base)
1918 		return;
1919 
1920 	for (ring_idx = 0; ring_idx < 2; ring_idx++) {
1921 		for (i = 0; i < rq->rx_ring[ring_idx].size; i++) {
1922 			struct vmxnet3_rx_buf_info *rbi;
1923 #ifdef __BIG_ENDIAN_BITFIELD
1924 			struct Vmxnet3_RxDesc rxDesc;
1925 #endif
1926 
1927 			rbi = &rq->buf_info[ring_idx][i];
1928 			vmxnet3_getRxDesc(rxd,
1929 				&rq->rx_ring[ring_idx].base[i].rxd, &rxDesc);
1930 
1931 			if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1932 			    rbi->page && rbi->buf_type == VMXNET3_RX_BUF_XDP) {
1933 				page_pool_recycle_direct(rq->page_pool,
1934 							 rbi->page);
1935 				rbi->page = NULL;
1936 			} else if (rxd->btype == VMXNET3_RXD_BTYPE_HEAD &&
1937 				   rbi->skb) {
1938 				dma_unmap_single(&adapter->pdev->dev, rxd->addr,
1939 						 rxd->len, DMA_FROM_DEVICE);
1940 				dev_kfree_skb(rbi->skb);
1941 				rbi->skb = NULL;
1942 			} else if (rxd->btype == VMXNET3_RXD_BTYPE_BODY &&
1943 				   rbi->page) {
1944 				dma_unmap_page(&adapter->pdev->dev, rxd->addr,
1945 					       rxd->len, DMA_FROM_DEVICE);
1946 				put_page(rbi->page);
1947 				rbi->page = NULL;
1948 			}
1949 		}
1950 
1951 		rq->rx_ring[ring_idx].gen = VMXNET3_INIT_GEN;
1952 		rq->rx_ring[ring_idx].next2fill =
1953 					rq->rx_ring[ring_idx].next2comp = 0;
1954 	}
1955 
1956 	rq->comp_ring.gen = VMXNET3_INIT_GEN;
1957 	rq->comp_ring.next2proc = 0;
1958 }
1959 
1960 
1961 static void
vmxnet3_rq_cleanup_all(struct vmxnet3_adapter * adapter)1962 vmxnet3_rq_cleanup_all(struct vmxnet3_adapter *adapter)
1963 {
1964 	int i;
1965 
1966 	for (i = 0; i < adapter->num_rx_queues; i++)
1967 		vmxnet3_rq_cleanup(&adapter->rx_queue[i], adapter);
1968 	rcu_assign_pointer(adapter->xdp_bpf_prog, NULL);
1969 }
1970 
1971 
vmxnet3_rq_destroy(struct vmxnet3_rx_queue * rq,struct vmxnet3_adapter * adapter)1972 static void vmxnet3_rq_destroy(struct vmxnet3_rx_queue *rq,
1973 			       struct vmxnet3_adapter *adapter)
1974 {
1975 	int i;
1976 	int j;
1977 
1978 	/* all rx buffers must have already been freed */
1979 	for (i = 0; i < 2; i++) {
1980 		if (rq->buf_info[i]) {
1981 			for (j = 0; j < rq->rx_ring[i].size; j++)
1982 				BUG_ON(rq->buf_info[i][j].page != NULL);
1983 		}
1984 	}
1985 
1986 
1987 	for (i = 0; i < 2; i++) {
1988 		if (rq->rx_ring[i].base) {
1989 			dma_free_coherent(&adapter->pdev->dev,
1990 					  rq->rx_ring[i].size
1991 					  * sizeof(struct Vmxnet3_RxDesc),
1992 					  rq->rx_ring[i].base,
1993 					  rq->rx_ring[i].basePA);
1994 			rq->rx_ring[i].base = NULL;
1995 		}
1996 	}
1997 
1998 	if (xdp_rxq_info_is_reg(&rq->xdp_rxq))
1999 		xdp_rxq_info_unreg(&rq->xdp_rxq);
2000 	page_pool_destroy(rq->page_pool);
2001 	rq->page_pool = NULL;
2002 
2003 	if (rq->data_ring.base) {
2004 		dma_free_coherent(&adapter->pdev->dev,
2005 				  rq->rx_ring[0].size * rq->data_ring.desc_size,
2006 				  rq->data_ring.base, rq->data_ring.basePA);
2007 		rq->data_ring.base = NULL;
2008 	}
2009 
2010 	if (rq->comp_ring.base) {
2011 		dma_free_coherent(&adapter->pdev->dev, rq->comp_ring.size
2012 				  * sizeof(struct Vmxnet3_RxCompDesc),
2013 				  rq->comp_ring.base, rq->comp_ring.basePA);
2014 		rq->comp_ring.base = NULL;
2015 	}
2016 
2017 	kfree(rq->buf_info[0]);
2018 	rq->buf_info[0] = NULL;
2019 	rq->buf_info[1] = NULL;
2020 }
2021 
2022 static void
vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter * adapter)2023 vmxnet3_rq_destroy_all_rxdataring(struct vmxnet3_adapter *adapter)
2024 {
2025 	int i;
2026 
2027 	for (i = 0; i < adapter->num_rx_queues; i++) {
2028 		struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2029 
2030 		if (rq->data_ring.base) {
2031 			dma_free_coherent(&adapter->pdev->dev,
2032 					  (rq->rx_ring[0].size *
2033 					  rq->data_ring.desc_size),
2034 					  rq->data_ring.base,
2035 					  rq->data_ring.basePA);
2036 			rq->data_ring.base = NULL;
2037 		}
2038 		rq->data_ring.desc_size = 0;
2039 	}
2040 }
2041 
2042 static int
vmxnet3_rq_init(struct vmxnet3_rx_queue * rq,struct vmxnet3_adapter * adapter)2043 vmxnet3_rq_init(struct vmxnet3_rx_queue *rq,
2044 		struct vmxnet3_adapter  *adapter)
2045 {
2046 	int i, err;
2047 
2048 	/* initialize buf_info */
2049 	for (i = 0; i < rq->rx_ring[0].size; i++) {
2050 
2051 		/* 1st buf for a pkt is skbuff or xdp page */
2052 		if (i % adapter->rx_buf_per_pkt == 0) {
2053 			rq->buf_info[0][i].buf_type = vmxnet3_xdp_enabled(adapter) ?
2054 						      VMXNET3_RX_BUF_XDP :
2055 						      VMXNET3_RX_BUF_SKB;
2056 			rq->buf_info[0][i].len = adapter->skb_buf_size;
2057 		} else { /* subsequent bufs for a pkt is frag */
2058 			rq->buf_info[0][i].buf_type = VMXNET3_RX_BUF_PAGE;
2059 			rq->buf_info[0][i].len = PAGE_SIZE;
2060 		}
2061 	}
2062 	for (i = 0; i < rq->rx_ring[1].size; i++) {
2063 		rq->buf_info[1][i].buf_type = VMXNET3_RX_BUF_PAGE;
2064 		rq->buf_info[1][i].len = PAGE_SIZE;
2065 	}
2066 
2067 	/* reset internal state and allocate buffers for both rings */
2068 	for (i = 0; i < 2; i++) {
2069 		rq->rx_ring[i].next2fill = rq->rx_ring[i].next2comp = 0;
2070 
2071 		memset(rq->rx_ring[i].base, 0, rq->rx_ring[i].size *
2072 		       sizeof(struct Vmxnet3_RxDesc));
2073 		rq->rx_ring[i].gen = VMXNET3_INIT_GEN;
2074 		rq->rx_ring[i].isOutOfOrder = 0;
2075 	}
2076 
2077 	err = vmxnet3_create_pp(adapter, rq,
2078 				rq->rx_ring[0].size + rq->rx_ring[1].size);
2079 	if (err)
2080 		return err;
2081 
2082 	if (vmxnet3_rq_alloc_rx_buf(rq, 0, rq->rx_ring[0].size - 1,
2083 				    adapter) == 0) {
2084 		xdp_rxq_info_unreg(&rq->xdp_rxq);
2085 		page_pool_destroy(rq->page_pool);
2086 		rq->page_pool = NULL;
2087 
2088 		/* at least has 1 rx buffer for the 1st ring */
2089 		return -ENOMEM;
2090 	}
2091 	vmxnet3_rq_alloc_rx_buf(rq, 1, rq->rx_ring[1].size - 1, adapter);
2092 
2093 	/* reset the comp ring */
2094 	rq->comp_ring.next2proc = 0;
2095 	memset(rq->comp_ring.base, 0, rq->comp_ring.size *
2096 	       sizeof(struct Vmxnet3_RxCompDesc));
2097 	rq->comp_ring.gen = VMXNET3_INIT_GEN;
2098 
2099 	/* reset rxctx */
2100 	rq->rx_ctx.skb = NULL;
2101 
2102 	/* stats are not reset */
2103 	return 0;
2104 }
2105 
2106 
2107 static int
vmxnet3_rq_init_all(struct vmxnet3_adapter * adapter)2108 vmxnet3_rq_init_all(struct vmxnet3_adapter *adapter)
2109 {
2110 	int i, err = 0;
2111 
2112 	for (i = 0; i < adapter->num_rx_queues; i++) {
2113 		err = vmxnet3_rq_init(&adapter->rx_queue[i], adapter);
2114 		if (unlikely(err)) {
2115 			dev_err(&adapter->netdev->dev, "%s: failed to "
2116 				"initialize rx queue%i\n",
2117 				adapter->netdev->name, i);
2118 			break;
2119 		}
2120 	}
2121 	return err;
2122 
2123 }
2124 
2125 
2126 static int
vmxnet3_rq_create(struct vmxnet3_rx_queue * rq,struct vmxnet3_adapter * adapter)2127 vmxnet3_rq_create(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter)
2128 {
2129 	int i;
2130 	size_t sz;
2131 	struct vmxnet3_rx_buf_info *bi;
2132 
2133 	for (i = 0; i < 2; i++) {
2134 
2135 		sz = rq->rx_ring[i].size * sizeof(struct Vmxnet3_RxDesc);
2136 		rq->rx_ring[i].base = dma_alloc_coherent(
2137 						&adapter->pdev->dev, sz,
2138 						&rq->rx_ring[i].basePA,
2139 						GFP_KERNEL);
2140 		if (!rq->rx_ring[i].base) {
2141 			netdev_err(adapter->netdev,
2142 				   "failed to allocate rx ring %d\n", i);
2143 			goto err;
2144 		}
2145 	}
2146 
2147 	if ((adapter->rxdataring_enabled) && (rq->data_ring.desc_size != 0)) {
2148 		sz = rq->rx_ring[0].size * rq->data_ring.desc_size;
2149 		rq->data_ring.base =
2150 			dma_alloc_coherent(&adapter->pdev->dev, sz,
2151 					   &rq->data_ring.basePA,
2152 					   GFP_KERNEL);
2153 		if (!rq->data_ring.base) {
2154 			netdev_err(adapter->netdev,
2155 				   "rx data ring will be disabled\n");
2156 			adapter->rxdataring_enabled = false;
2157 		}
2158 	} else {
2159 		rq->data_ring.base = NULL;
2160 		rq->data_ring.desc_size = 0;
2161 	}
2162 
2163 	sz = rq->comp_ring.size * sizeof(struct Vmxnet3_RxCompDesc);
2164 	rq->comp_ring.base = dma_alloc_coherent(&adapter->pdev->dev, sz,
2165 						&rq->comp_ring.basePA,
2166 						GFP_KERNEL);
2167 	if (!rq->comp_ring.base) {
2168 		netdev_err(adapter->netdev, "failed to allocate rx comp ring\n");
2169 		goto err;
2170 	}
2171 
2172 	bi = kcalloc_node(rq->rx_ring[0].size + rq->rx_ring[1].size,
2173 			  sizeof(rq->buf_info[0][0]), GFP_KERNEL,
2174 			  dev_to_node(&adapter->pdev->dev));
2175 	if (!bi)
2176 		goto err;
2177 
2178 	rq->buf_info[0] = bi;
2179 	rq->buf_info[1] = bi + rq->rx_ring[0].size;
2180 
2181 	return 0;
2182 
2183 err:
2184 	vmxnet3_rq_destroy(rq, adapter);
2185 	return -ENOMEM;
2186 }
2187 
2188 
2189 int
vmxnet3_rq_create_all(struct vmxnet3_adapter * adapter)2190 vmxnet3_rq_create_all(struct vmxnet3_adapter *adapter)
2191 {
2192 	int i, err = 0;
2193 
2194 	adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
2195 
2196 	for (i = 0; i < adapter->num_rx_queues; i++) {
2197 		err = vmxnet3_rq_create(&adapter->rx_queue[i], adapter);
2198 		if (unlikely(err)) {
2199 			dev_err(&adapter->netdev->dev,
2200 				"%s: failed to create rx queue%i\n",
2201 				adapter->netdev->name, i);
2202 			goto err_out;
2203 		}
2204 	}
2205 
2206 	if (!adapter->rxdataring_enabled)
2207 		vmxnet3_rq_destroy_all_rxdataring(adapter);
2208 
2209 	return err;
2210 err_out:
2211 	vmxnet3_rq_destroy_all(adapter);
2212 	return err;
2213 
2214 }
2215 
2216 /* Multiple queue aware polling function for tx and rx */
2217 
2218 static int
vmxnet3_do_poll(struct vmxnet3_adapter * adapter,int budget)2219 vmxnet3_do_poll(struct vmxnet3_adapter *adapter, int budget)
2220 {
2221 	int rcd_done = 0, i;
2222 	if (unlikely(adapter->shared->ecr))
2223 		vmxnet3_process_events(adapter);
2224 	for (i = 0; i < adapter->num_tx_queues; i++)
2225 		vmxnet3_tq_tx_complete(&adapter->tx_queue[i], adapter);
2226 
2227 	for (i = 0; i < adapter->num_rx_queues; i++)
2228 		rcd_done += vmxnet3_rq_rx_complete(&adapter->rx_queue[i],
2229 						   adapter, budget);
2230 	return rcd_done;
2231 }
2232 
2233 
2234 static int
vmxnet3_poll(struct napi_struct * napi,int budget)2235 vmxnet3_poll(struct napi_struct *napi, int budget)
2236 {
2237 	struct vmxnet3_rx_queue *rx_queue = container_of(napi,
2238 					  struct vmxnet3_rx_queue, napi);
2239 	int rxd_done;
2240 
2241 	rxd_done = vmxnet3_do_poll(rx_queue->adapter, budget);
2242 
2243 	if (rxd_done < budget) {
2244 		napi_complete_done(napi, rxd_done);
2245 		vmxnet3_enable_all_intrs(rx_queue->adapter);
2246 	}
2247 	return rxd_done;
2248 }
2249 
2250 /*
2251  * NAPI polling function for MSI-X mode with multiple Rx queues
2252  * Returns the # of the NAPI credit consumed (# of rx descriptors processed)
2253  */
2254 
2255 static int
vmxnet3_poll_rx_only(struct napi_struct * napi,int budget)2256 vmxnet3_poll_rx_only(struct napi_struct *napi, int budget)
2257 {
2258 	struct vmxnet3_rx_queue *rq = container_of(napi,
2259 						struct vmxnet3_rx_queue, napi);
2260 	struct vmxnet3_adapter *adapter = rq->adapter;
2261 	int rxd_done;
2262 
2263 	/* When sharing interrupt with corresponding tx queue, process
2264 	 * tx completions in that queue as well
2265 	 */
2266 	if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE) {
2267 		struct vmxnet3_tx_queue *tq =
2268 				&adapter->tx_queue[rq - adapter->rx_queue];
2269 		vmxnet3_tq_tx_complete(tq, adapter);
2270 	}
2271 
2272 	rxd_done = vmxnet3_rq_rx_complete(rq, adapter, budget);
2273 
2274 	if (rxd_done < budget) {
2275 		napi_complete_done(napi, rxd_done);
2276 		vmxnet3_enable_intr(adapter, rq->comp_ring.intr_idx);
2277 	}
2278 	return rxd_done;
2279 }
2280 
2281 
2282 #ifdef CONFIG_PCI_MSI
2283 
2284 /*
2285  * Handle completion interrupts on tx queues
2286  * Returns whether or not the intr is handled
2287  */
2288 
2289 static irqreturn_t
vmxnet3_msix_tx(int irq,void * data)2290 vmxnet3_msix_tx(int irq, void *data)
2291 {
2292 	struct vmxnet3_tx_queue *tq = data;
2293 	struct vmxnet3_adapter *adapter = tq->adapter;
2294 
2295 	if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
2296 		vmxnet3_disable_intr(adapter, tq->comp_ring.intr_idx);
2297 
2298 	/* Handle the case where only one irq is allocate for all tx queues */
2299 	if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
2300 		int i;
2301 		for (i = 0; i < adapter->num_tx_queues; i++) {
2302 			struct vmxnet3_tx_queue *txq = &adapter->tx_queue[i];
2303 			vmxnet3_tq_tx_complete(txq, adapter);
2304 		}
2305 	} else {
2306 		vmxnet3_tq_tx_complete(tq, adapter);
2307 	}
2308 	vmxnet3_enable_intr(adapter, tq->comp_ring.intr_idx);
2309 
2310 	return IRQ_HANDLED;
2311 }
2312 
2313 
2314 /*
2315  * Handle completion interrupts on rx queues. Returns whether or not the
2316  * intr is handled
2317  */
2318 
2319 static irqreturn_t
vmxnet3_msix_rx(int irq,void * data)2320 vmxnet3_msix_rx(int irq, void *data)
2321 {
2322 	struct vmxnet3_rx_queue *rq = data;
2323 	struct vmxnet3_adapter *adapter = rq->adapter;
2324 
2325 	/* disable intr if needed */
2326 	if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
2327 		vmxnet3_disable_intr(adapter, rq->comp_ring.intr_idx);
2328 	napi_schedule(&rq->napi);
2329 
2330 	return IRQ_HANDLED;
2331 }
2332 
2333 /*
2334  *----------------------------------------------------------------------------
2335  *
2336  * vmxnet3_msix_event --
2337  *
2338  *    vmxnet3 msix event intr handler
2339  *
2340  * Result:
2341  *    whether or not the intr is handled
2342  *
2343  *----------------------------------------------------------------------------
2344  */
2345 
2346 static irqreturn_t
vmxnet3_msix_event(int irq,void * data)2347 vmxnet3_msix_event(int irq, void *data)
2348 {
2349 	struct net_device *dev = data;
2350 	struct vmxnet3_adapter *adapter = netdev_priv(dev);
2351 
2352 	/* disable intr if needed */
2353 	if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
2354 		vmxnet3_disable_intr(adapter, adapter->intr.event_intr_idx);
2355 
2356 	if (adapter->shared->ecr)
2357 		vmxnet3_process_events(adapter);
2358 
2359 	vmxnet3_enable_intr(adapter, adapter->intr.event_intr_idx);
2360 
2361 	return IRQ_HANDLED;
2362 }
2363 
2364 #endif /* CONFIG_PCI_MSI  */
2365 
2366 
2367 /* Interrupt handler for vmxnet3  */
2368 static irqreturn_t
vmxnet3_intr(int irq,void * dev_id)2369 vmxnet3_intr(int irq, void *dev_id)
2370 {
2371 	struct net_device *dev = dev_id;
2372 	struct vmxnet3_adapter *adapter = netdev_priv(dev);
2373 
2374 	if (adapter->intr.type == VMXNET3_IT_INTX) {
2375 		u32 icr = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_ICR);
2376 		if (unlikely(icr == 0))
2377 			/* not ours */
2378 			return IRQ_NONE;
2379 	}
2380 
2381 
2382 	/* disable intr if needed */
2383 	if (adapter->intr.mask_mode == VMXNET3_IMM_ACTIVE)
2384 		vmxnet3_disable_all_intrs(adapter);
2385 
2386 	napi_schedule(&adapter->rx_queue[0].napi);
2387 
2388 	return IRQ_HANDLED;
2389 }
2390 
2391 #ifdef CONFIG_NET_POLL_CONTROLLER
2392 
2393 /* netpoll callback. */
2394 static void
vmxnet3_netpoll(struct net_device * netdev)2395 vmxnet3_netpoll(struct net_device *netdev)
2396 {
2397 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2398 
2399 	switch (adapter->intr.type) {
2400 #ifdef CONFIG_PCI_MSI
2401 	case VMXNET3_IT_MSIX: {
2402 		int i;
2403 		for (i = 0; i < adapter->num_rx_queues; i++)
2404 			vmxnet3_msix_rx(0, &adapter->rx_queue[i]);
2405 		break;
2406 	}
2407 #endif
2408 	case VMXNET3_IT_MSI:
2409 	default:
2410 		vmxnet3_intr(0, adapter->netdev);
2411 		break;
2412 	}
2413 
2414 }
2415 #endif	/* CONFIG_NET_POLL_CONTROLLER */
2416 
2417 static int
vmxnet3_request_irqs(struct vmxnet3_adapter * adapter)2418 vmxnet3_request_irqs(struct vmxnet3_adapter *adapter)
2419 {
2420 	struct vmxnet3_intr *intr = &adapter->intr;
2421 	int err = 0, i;
2422 	int vector = 0;
2423 
2424 #ifdef CONFIG_PCI_MSI
2425 	if (adapter->intr.type == VMXNET3_IT_MSIX) {
2426 		for (i = 0; i < adapter->num_tx_queues; i++) {
2427 			if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2428 				sprintf(adapter->tx_queue[i].name, "%s-tx-%d",
2429 					adapter->netdev->name, vector);
2430 				err = request_irq(
2431 					      intr->msix_entries[vector].vector,
2432 					      vmxnet3_msix_tx, 0,
2433 					      adapter->tx_queue[i].name,
2434 					      &adapter->tx_queue[i]);
2435 			} else {
2436 				sprintf(adapter->tx_queue[i].name, "%s-rxtx-%d",
2437 					adapter->netdev->name, vector);
2438 			}
2439 			if (err) {
2440 				dev_err(&adapter->netdev->dev,
2441 					"Failed to request irq for MSIX, %s, "
2442 					"error %d\n",
2443 					adapter->tx_queue[i].name, err);
2444 				return err;
2445 			}
2446 
2447 			/* Handle the case where only 1 MSIx was allocated for
2448 			 * all tx queues */
2449 			if (adapter->share_intr == VMXNET3_INTR_TXSHARE) {
2450 				for (; i < adapter->num_tx_queues; i++)
2451 					adapter->tx_queue[i].comp_ring.intr_idx
2452 								= vector;
2453 				vector++;
2454 				break;
2455 			} else {
2456 				adapter->tx_queue[i].comp_ring.intr_idx
2457 								= vector++;
2458 			}
2459 		}
2460 		if (adapter->share_intr == VMXNET3_INTR_BUDDYSHARE)
2461 			vector = 0;
2462 
2463 		for (i = 0; i < adapter->num_rx_queues; i++) {
2464 			if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE)
2465 				sprintf(adapter->rx_queue[i].name, "%s-rx-%d",
2466 					adapter->netdev->name, vector);
2467 			else
2468 				sprintf(adapter->rx_queue[i].name, "%s-rxtx-%d",
2469 					adapter->netdev->name, vector);
2470 			err = request_irq(intr->msix_entries[vector].vector,
2471 					  vmxnet3_msix_rx, 0,
2472 					  adapter->rx_queue[i].name,
2473 					  &(adapter->rx_queue[i]));
2474 			if (err) {
2475 				netdev_err(adapter->netdev,
2476 					   "Failed to request irq for MSIX, "
2477 					   "%s, error %d\n",
2478 					   adapter->rx_queue[i].name, err);
2479 				return err;
2480 			}
2481 
2482 			adapter->rx_queue[i].comp_ring.intr_idx = vector++;
2483 		}
2484 
2485 		sprintf(intr->event_msi_vector_name, "%s-event-%d",
2486 			adapter->netdev->name, vector);
2487 		err = request_irq(intr->msix_entries[vector].vector,
2488 				  vmxnet3_msix_event, 0,
2489 				  intr->event_msi_vector_name, adapter->netdev);
2490 		intr->event_intr_idx = vector;
2491 
2492 	} else if (intr->type == VMXNET3_IT_MSI) {
2493 		adapter->num_rx_queues = 1;
2494 		err = request_irq(adapter->pdev->irq, vmxnet3_intr, 0,
2495 				  adapter->netdev->name, adapter->netdev);
2496 	} else {
2497 #endif
2498 		adapter->num_rx_queues = 1;
2499 		err = request_irq(adapter->pdev->irq, vmxnet3_intr,
2500 				  IRQF_SHARED, adapter->netdev->name,
2501 				  adapter->netdev);
2502 #ifdef CONFIG_PCI_MSI
2503 	}
2504 #endif
2505 	intr->num_intrs = vector + 1;
2506 	if (err) {
2507 		netdev_err(adapter->netdev,
2508 			   "Failed to request irq (intr type:%d), error %d\n",
2509 			   intr->type, err);
2510 	} else {
2511 		/* Number of rx queues will not change after this */
2512 		for (i = 0; i < adapter->num_rx_queues; i++) {
2513 			struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
2514 			rq->qid = i;
2515 			rq->qid2 = i + adapter->num_rx_queues;
2516 			rq->dataRingQid = i + 2 * adapter->num_rx_queues;
2517 		}
2518 
2519 		/* init our intr settings */
2520 		for (i = 0; i < intr->num_intrs; i++)
2521 			intr->mod_levels[i] = UPT1_IML_ADAPTIVE;
2522 		if (adapter->intr.type != VMXNET3_IT_MSIX) {
2523 			adapter->intr.event_intr_idx = 0;
2524 			for (i = 0; i < adapter->num_tx_queues; i++)
2525 				adapter->tx_queue[i].comp_ring.intr_idx = 0;
2526 			adapter->rx_queue[0].comp_ring.intr_idx = 0;
2527 		}
2528 
2529 		netdev_info(adapter->netdev,
2530 			    "intr type %u, mode %u, %u vectors allocated\n",
2531 			    intr->type, intr->mask_mode, intr->num_intrs);
2532 	}
2533 
2534 	return err;
2535 }
2536 
2537 
2538 static void
vmxnet3_free_irqs(struct vmxnet3_adapter * adapter)2539 vmxnet3_free_irqs(struct vmxnet3_adapter *adapter)
2540 {
2541 	struct vmxnet3_intr *intr = &adapter->intr;
2542 	BUG_ON(intr->type == VMXNET3_IT_AUTO || intr->num_intrs <= 0);
2543 
2544 	switch (intr->type) {
2545 #ifdef CONFIG_PCI_MSI
2546 	case VMXNET3_IT_MSIX:
2547 	{
2548 		int i, vector = 0;
2549 
2550 		if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE) {
2551 			for (i = 0; i < adapter->num_tx_queues; i++) {
2552 				free_irq(intr->msix_entries[vector++].vector,
2553 					 &(adapter->tx_queue[i]));
2554 				if (adapter->share_intr == VMXNET3_INTR_TXSHARE)
2555 					break;
2556 			}
2557 		}
2558 
2559 		for (i = 0; i < adapter->num_rx_queues; i++) {
2560 			free_irq(intr->msix_entries[vector++].vector,
2561 				 &(adapter->rx_queue[i]));
2562 		}
2563 
2564 		free_irq(intr->msix_entries[vector].vector,
2565 			 adapter->netdev);
2566 		BUG_ON(vector >= intr->num_intrs);
2567 		break;
2568 	}
2569 #endif
2570 	case VMXNET3_IT_MSI:
2571 		free_irq(adapter->pdev->irq, adapter->netdev);
2572 		break;
2573 	case VMXNET3_IT_INTX:
2574 		free_irq(adapter->pdev->irq, adapter->netdev);
2575 		break;
2576 	default:
2577 		BUG();
2578 	}
2579 }
2580 
2581 
2582 static void
vmxnet3_restore_vlan(struct vmxnet3_adapter * adapter)2583 vmxnet3_restore_vlan(struct vmxnet3_adapter *adapter)
2584 {
2585 	u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2586 	u16 vid;
2587 
2588 	/* allow untagged pkts */
2589 	VMXNET3_SET_VFTABLE_ENTRY(vfTable, 0);
2590 
2591 	for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2592 		VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2593 }
2594 
2595 
2596 static int
vmxnet3_vlan_rx_add_vid(struct net_device * netdev,__be16 proto,u16 vid)2597 vmxnet3_vlan_rx_add_vid(struct net_device *netdev, __be16 proto, u16 vid)
2598 {
2599 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2600 
2601 	if (!(netdev->flags & IFF_PROMISC)) {
2602 		u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2603 		unsigned long flags;
2604 
2605 		VMXNET3_SET_VFTABLE_ENTRY(vfTable, vid);
2606 		spin_lock_irqsave(&adapter->cmd_lock, flags);
2607 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2608 				       VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2609 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2610 	}
2611 
2612 	set_bit(vid, adapter->active_vlans);
2613 
2614 	return 0;
2615 }
2616 
2617 
2618 static int
vmxnet3_vlan_rx_kill_vid(struct net_device * netdev,__be16 proto,u16 vid)2619 vmxnet3_vlan_rx_kill_vid(struct net_device *netdev, __be16 proto, u16 vid)
2620 {
2621 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2622 
2623 	if (!(netdev->flags & IFF_PROMISC)) {
2624 		u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2625 		unsigned long flags;
2626 
2627 		VMXNET3_CLEAR_VFTABLE_ENTRY(vfTable, vid);
2628 		spin_lock_irqsave(&adapter->cmd_lock, flags);
2629 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2630 				       VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2631 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2632 	}
2633 
2634 	clear_bit(vid, adapter->active_vlans);
2635 
2636 	return 0;
2637 }
2638 
2639 
2640 static u8 *
vmxnet3_copy_mc(struct net_device * netdev)2641 vmxnet3_copy_mc(struct net_device *netdev)
2642 {
2643 	u8 *buf = NULL;
2644 	u32 sz = netdev_mc_count(netdev) * ETH_ALEN;
2645 
2646 	/* struct Vmxnet3_RxFilterConf.mfTableLen is u16. */
2647 	if (sz <= 0xffff) {
2648 		/* We may be called with BH disabled */
2649 		buf = kmalloc(sz, GFP_ATOMIC);
2650 		if (buf) {
2651 			struct netdev_hw_addr *ha;
2652 			int i = 0;
2653 
2654 			netdev_for_each_mc_addr(ha, netdev)
2655 				memcpy(buf + i++ * ETH_ALEN, ha->addr,
2656 				       ETH_ALEN);
2657 		}
2658 	}
2659 	return buf;
2660 }
2661 
2662 
2663 static void
vmxnet3_set_mc(struct net_device * netdev)2664 vmxnet3_set_mc(struct net_device *netdev)
2665 {
2666 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
2667 	unsigned long flags;
2668 	struct Vmxnet3_RxFilterConf *rxConf =
2669 					&adapter->shared->devRead.rxFilterConf;
2670 	u8 *new_table = NULL;
2671 	dma_addr_t new_table_pa = 0;
2672 	bool new_table_pa_valid = false;
2673 	u32 new_mode = VMXNET3_RXM_UCAST;
2674 
2675 	if (netdev->flags & IFF_PROMISC) {
2676 		u32 *vfTable = adapter->shared->devRead.rxFilterConf.vfTable;
2677 		memset(vfTable, 0, VMXNET3_VFT_SIZE * sizeof(*vfTable));
2678 
2679 		new_mode |= VMXNET3_RXM_PROMISC;
2680 	} else {
2681 		vmxnet3_restore_vlan(adapter);
2682 	}
2683 
2684 	if (netdev->flags & IFF_BROADCAST)
2685 		new_mode |= VMXNET3_RXM_BCAST;
2686 
2687 	if (netdev->flags & IFF_ALLMULTI)
2688 		new_mode |= VMXNET3_RXM_ALL_MULTI;
2689 	else
2690 		if (!netdev_mc_empty(netdev)) {
2691 			new_table = vmxnet3_copy_mc(netdev);
2692 			if (new_table) {
2693 				size_t sz = netdev_mc_count(netdev) * ETH_ALEN;
2694 
2695 				rxConf->mfTableLen = cpu_to_le16(sz);
2696 				new_table_pa = dma_map_single(
2697 							&adapter->pdev->dev,
2698 							new_table,
2699 							sz,
2700 							DMA_TO_DEVICE);
2701 				if (!dma_mapping_error(&adapter->pdev->dev,
2702 						       new_table_pa)) {
2703 					new_mode |= VMXNET3_RXM_MCAST;
2704 					new_table_pa_valid = true;
2705 					rxConf->mfTablePA = cpu_to_le64(
2706 								new_table_pa);
2707 				}
2708 			}
2709 			if (!new_table_pa_valid) {
2710 				netdev_info(netdev,
2711 					    "failed to copy mcast list, setting ALL_MULTI\n");
2712 				new_mode |= VMXNET3_RXM_ALL_MULTI;
2713 			}
2714 		}
2715 
2716 	if (!(new_mode & VMXNET3_RXM_MCAST)) {
2717 		rxConf->mfTableLen = 0;
2718 		rxConf->mfTablePA = 0;
2719 	}
2720 
2721 	spin_lock_irqsave(&adapter->cmd_lock, flags);
2722 	if (new_mode != rxConf->rxMode) {
2723 		rxConf->rxMode = cpu_to_le32(new_mode);
2724 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2725 				       VMXNET3_CMD_UPDATE_RX_MODE);
2726 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2727 				       VMXNET3_CMD_UPDATE_VLAN_FILTERS);
2728 	}
2729 
2730 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2731 			       VMXNET3_CMD_UPDATE_MAC_FILTERS);
2732 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2733 
2734 	if (new_table_pa_valid)
2735 		dma_unmap_single(&adapter->pdev->dev, new_table_pa,
2736 				 rxConf->mfTableLen, DMA_TO_DEVICE);
2737 	kfree(new_table);
2738 }
2739 
2740 void
vmxnet3_rq_destroy_all(struct vmxnet3_adapter * adapter)2741 vmxnet3_rq_destroy_all(struct vmxnet3_adapter *adapter)
2742 {
2743 	int i;
2744 
2745 	for (i = 0; i < adapter->num_rx_queues; i++)
2746 		vmxnet3_rq_destroy(&adapter->rx_queue[i], adapter);
2747 }
2748 
2749 
2750 /*
2751  *   Set up driver_shared based on settings in adapter.
2752  */
2753 
2754 static void
vmxnet3_setup_driver_shared(struct vmxnet3_adapter * adapter)2755 vmxnet3_setup_driver_shared(struct vmxnet3_adapter *adapter)
2756 {
2757 	struct Vmxnet3_DriverShared *shared = adapter->shared;
2758 	struct Vmxnet3_DSDevRead *devRead = &shared->devRead;
2759 	struct Vmxnet3_DSDevReadExt *devReadExt = &shared->devReadExt;
2760 	struct Vmxnet3_TxQueueConf *tqc;
2761 	struct Vmxnet3_RxQueueConf *rqc;
2762 	int i;
2763 
2764 	memset(shared, 0, sizeof(*shared));
2765 
2766 	/* driver settings */
2767 	shared->magic = cpu_to_le32(VMXNET3_REV1_MAGIC);
2768 	devRead->misc.driverInfo.version = cpu_to_le32(
2769 						VMXNET3_DRIVER_VERSION_NUM);
2770 	devRead->misc.driverInfo.gos.gosBits = (sizeof(void *) == 4 ?
2771 				VMXNET3_GOS_BITS_32 : VMXNET3_GOS_BITS_64);
2772 	devRead->misc.driverInfo.gos.gosType = VMXNET3_GOS_TYPE_LINUX;
2773 	*((u32 *)&devRead->misc.driverInfo.gos) = cpu_to_le32(
2774 				*((u32 *)&devRead->misc.driverInfo.gos));
2775 	devRead->misc.driverInfo.vmxnet3RevSpt = cpu_to_le32(1);
2776 	devRead->misc.driverInfo.uptVerSpt = cpu_to_le32(1);
2777 
2778 	devRead->misc.ddPA = cpu_to_le64(adapter->adapter_pa);
2779 	devRead->misc.ddLen = cpu_to_le32(sizeof(struct vmxnet3_adapter));
2780 
2781 	/* set up feature flags */
2782 	if (adapter->netdev->features & NETIF_F_RXCSUM)
2783 		devRead->misc.uptFeatures |= UPT1_F_RXCSUM;
2784 
2785 	if (adapter->netdev->features & NETIF_F_LRO) {
2786 		devRead->misc.uptFeatures |= UPT1_F_LRO;
2787 		devRead->misc.maxNumRxSG = cpu_to_le16(1 + MAX_SKB_FRAGS);
2788 	}
2789 	if (adapter->netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
2790 		devRead->misc.uptFeatures |= UPT1_F_RXVLAN;
2791 
2792 	if (adapter->netdev->features & (NETIF_F_GSO_UDP_TUNNEL |
2793 					 NETIF_F_GSO_UDP_TUNNEL_CSUM))
2794 		devRead->misc.uptFeatures |= UPT1_F_RXINNEROFLD;
2795 
2796 	devRead->misc.mtu = cpu_to_le32(adapter->netdev->mtu);
2797 	devRead->misc.queueDescPA = cpu_to_le64(adapter->queue_desc_pa);
2798 	devRead->misc.queueDescLen = cpu_to_le32(
2799 		adapter->num_tx_queues * sizeof(struct Vmxnet3_TxQueueDesc) +
2800 		adapter->num_rx_queues * sizeof(struct Vmxnet3_RxQueueDesc));
2801 
2802 	/* tx queue settings */
2803 	devRead->misc.numTxQueues =  adapter->num_tx_queues;
2804 	for (i = 0; i < adapter->num_tx_queues; i++) {
2805 		struct vmxnet3_tx_queue	*tq = &adapter->tx_queue[i];
2806 		BUG_ON(adapter->tx_queue[i].tx_ring.base == NULL);
2807 		tqc = &adapter->tqd_start[i].conf;
2808 		tqc->txRingBasePA   = cpu_to_le64(tq->tx_ring.basePA);
2809 		tqc->dataRingBasePA = cpu_to_le64(tq->data_ring.basePA);
2810 		tqc->compRingBasePA = cpu_to_le64(tq->comp_ring.basePA);
2811 		tqc->ddPA           = cpu_to_le64(~0ULL);
2812 		tqc->txRingSize     = cpu_to_le32(tq->tx_ring.size);
2813 		tqc->dataRingSize   = cpu_to_le32(tq->data_ring.size);
2814 		tqc->txDataRingDescSize = cpu_to_le32(tq->txdata_desc_size);
2815 		tqc->compRingSize   = cpu_to_le32(tq->comp_ring.size);
2816 		tqc->ddLen          = cpu_to_le32(0);
2817 		tqc->intrIdx        = tq->comp_ring.intr_idx;
2818 	}
2819 
2820 	/* rx queue settings */
2821 	devRead->misc.numRxQueues = adapter->num_rx_queues;
2822 	for (i = 0; i < adapter->num_rx_queues; i++) {
2823 		struct vmxnet3_rx_queue	*rq = &adapter->rx_queue[i];
2824 		rqc = &adapter->rqd_start[i].conf;
2825 		rqc->rxRingBasePA[0] = cpu_to_le64(rq->rx_ring[0].basePA);
2826 		rqc->rxRingBasePA[1] = cpu_to_le64(rq->rx_ring[1].basePA);
2827 		rqc->compRingBasePA  = cpu_to_le64(rq->comp_ring.basePA);
2828 		rqc->ddPA            = cpu_to_le64(~0ULL);
2829 		rqc->rxRingSize[0]   = cpu_to_le32(rq->rx_ring[0].size);
2830 		rqc->rxRingSize[1]   = cpu_to_le32(rq->rx_ring[1].size);
2831 		rqc->compRingSize    = cpu_to_le32(rq->comp_ring.size);
2832 		rqc->ddLen           = cpu_to_le32(0);
2833 		rqc->intrIdx         = rq->comp_ring.intr_idx;
2834 		if (VMXNET3_VERSION_GE_3(adapter)) {
2835 			rqc->rxDataRingBasePA =
2836 				cpu_to_le64(rq->data_ring.basePA);
2837 			rqc->rxDataRingDescSize =
2838 				cpu_to_le16(rq->data_ring.desc_size);
2839 		}
2840 	}
2841 
2842 #ifdef VMXNET3_RSS
2843 	memset(adapter->rss_conf, 0, sizeof(*adapter->rss_conf));
2844 
2845 	if (adapter->rss) {
2846 		struct UPT1_RSSConf *rssConf = adapter->rss_conf;
2847 
2848 		devRead->misc.uptFeatures |= UPT1_F_RSS;
2849 		devRead->misc.numRxQueues = adapter->num_rx_queues;
2850 		rssConf->hashType = UPT1_RSS_HASH_TYPE_TCP_IPV4 |
2851 				    UPT1_RSS_HASH_TYPE_IPV4 |
2852 				    UPT1_RSS_HASH_TYPE_TCP_IPV6 |
2853 				    UPT1_RSS_HASH_TYPE_IPV6;
2854 		rssConf->hashFunc = UPT1_RSS_HASH_FUNC_TOEPLITZ;
2855 		rssConf->hashKeySize = UPT1_RSS_MAX_KEY_SIZE;
2856 		rssConf->indTableSize = VMXNET3_RSS_IND_TABLE_SIZE;
2857 		netdev_rss_key_fill(rssConf->hashKey, sizeof(rssConf->hashKey));
2858 
2859 		for (i = 0; i < rssConf->indTableSize; i++)
2860 			rssConf->indTable[i] = ethtool_rxfh_indir_default(
2861 				i, adapter->num_rx_queues);
2862 
2863 		devRead->rssConfDesc.confVer = 1;
2864 		devRead->rssConfDesc.confLen = cpu_to_le32(sizeof(*rssConf));
2865 		devRead->rssConfDesc.confPA =
2866 			cpu_to_le64(adapter->rss_conf_pa);
2867 	}
2868 
2869 #endif /* VMXNET3_RSS */
2870 
2871 	/* intr settings */
2872 	if (!VMXNET3_VERSION_GE_6(adapter) ||
2873 	    !adapter->queuesExtEnabled) {
2874 		devRead->intrConf.autoMask = adapter->intr.mask_mode ==
2875 					     VMXNET3_IMM_AUTO;
2876 		devRead->intrConf.numIntrs = adapter->intr.num_intrs;
2877 		for (i = 0; i < adapter->intr.num_intrs; i++)
2878 			devRead->intrConf.modLevels[i] = adapter->intr.mod_levels[i];
2879 
2880 		devRead->intrConf.eventIntrIdx = adapter->intr.event_intr_idx;
2881 		devRead->intrConf.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2882 	} else {
2883 		devReadExt->intrConfExt.autoMask = adapter->intr.mask_mode ==
2884 						   VMXNET3_IMM_AUTO;
2885 		devReadExt->intrConfExt.numIntrs = adapter->intr.num_intrs;
2886 		for (i = 0; i < adapter->intr.num_intrs; i++)
2887 			devReadExt->intrConfExt.modLevels[i] = adapter->intr.mod_levels[i];
2888 
2889 		devReadExt->intrConfExt.eventIntrIdx = adapter->intr.event_intr_idx;
2890 		devReadExt->intrConfExt.intrCtrl |= cpu_to_le32(VMXNET3_IC_DISABLE_ALL);
2891 	}
2892 
2893 	/* rx filter settings */
2894 	devRead->rxFilterConf.rxMode = 0;
2895 	vmxnet3_restore_vlan(adapter);
2896 	vmxnet3_write_mac_addr(adapter, adapter->netdev->dev_addr);
2897 
2898 	/* the rest are already zeroed */
2899 }
2900 
2901 static void
vmxnet3_init_bufsize(struct vmxnet3_adapter * adapter)2902 vmxnet3_init_bufsize(struct vmxnet3_adapter *adapter)
2903 {
2904 	struct Vmxnet3_DriverShared *shared = adapter->shared;
2905 	union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
2906 	unsigned long flags;
2907 
2908 	if (!VMXNET3_VERSION_GE_7(adapter))
2909 		return;
2910 
2911 	cmdInfo->ringBufSize = adapter->ringBufSize;
2912 	spin_lock_irqsave(&adapter->cmd_lock, flags);
2913 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2914 			       VMXNET3_CMD_SET_RING_BUFFER_SIZE);
2915 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2916 }
2917 
2918 static void
vmxnet3_init_coalesce(struct vmxnet3_adapter * adapter)2919 vmxnet3_init_coalesce(struct vmxnet3_adapter *adapter)
2920 {
2921 	struct Vmxnet3_DriverShared *shared = adapter->shared;
2922 	union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
2923 	unsigned long flags;
2924 
2925 	if (!VMXNET3_VERSION_GE_3(adapter))
2926 		return;
2927 
2928 	spin_lock_irqsave(&adapter->cmd_lock, flags);
2929 	cmdInfo->varConf.confVer = 1;
2930 	cmdInfo->varConf.confLen =
2931 		cpu_to_le32(sizeof(*adapter->coal_conf));
2932 	cmdInfo->varConf.confPA  = cpu_to_le64(adapter->coal_conf_pa);
2933 
2934 	if (adapter->default_coal_mode) {
2935 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2936 				       VMXNET3_CMD_GET_COALESCE);
2937 	} else {
2938 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2939 				       VMXNET3_CMD_SET_COALESCE);
2940 	}
2941 
2942 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
2943 }
2944 
2945 static void
vmxnet3_init_rssfields(struct vmxnet3_adapter * adapter)2946 vmxnet3_init_rssfields(struct vmxnet3_adapter *adapter)
2947 {
2948 	struct Vmxnet3_DriverShared *shared = adapter->shared;
2949 	union Vmxnet3_CmdInfo *cmdInfo = &shared->cu.cmdInfo;
2950 	unsigned long flags;
2951 
2952 	if (!VMXNET3_VERSION_GE_4(adapter))
2953 		return;
2954 
2955 	spin_lock_irqsave(&adapter->cmd_lock, flags);
2956 
2957 	if (adapter->default_rss_fields) {
2958 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2959 				       VMXNET3_CMD_GET_RSS_FIELDS);
2960 		adapter->rss_fields =
2961 			VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2962 	} else {
2963 		if (VMXNET3_VERSION_GE_7(adapter)) {
2964 			if ((adapter->rss_fields & VMXNET3_RSS_FIELDS_UDPIP4 ||
2965 			     adapter->rss_fields & VMXNET3_RSS_FIELDS_UDPIP6) &&
2966 			    vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
2967 						       VMXNET3_CAP_UDP_RSS)) {
2968 				adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_UDP_RSS;
2969 			} else {
2970 				adapter->dev_caps[0] &= ~(1UL << VMXNET3_CAP_UDP_RSS);
2971 			}
2972 
2973 			if ((adapter->rss_fields & VMXNET3_RSS_FIELDS_ESPIP4) &&
2974 			    vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
2975 						       VMXNET3_CAP_ESP_RSS_IPV4)) {
2976 				adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_ESP_RSS_IPV4;
2977 			} else {
2978 				adapter->dev_caps[0] &= ~(1UL << VMXNET3_CAP_ESP_RSS_IPV4);
2979 			}
2980 
2981 			if ((adapter->rss_fields & VMXNET3_RSS_FIELDS_ESPIP6) &&
2982 			    vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
2983 						       VMXNET3_CAP_ESP_RSS_IPV6)) {
2984 				adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_ESP_RSS_IPV6;
2985 			} else {
2986 				adapter->dev_caps[0] &= ~(1UL << VMXNET3_CAP_ESP_RSS_IPV6);
2987 			}
2988 
2989 			VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]);
2990 			VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DCR0_REG);
2991 			adapter->dev_caps[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
2992 		}
2993 		cmdInfo->setRssFields = adapter->rss_fields;
2994 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
2995 				       VMXNET3_CMD_SET_RSS_FIELDS);
2996 		/* Not all requested RSS may get applied, so get and
2997 		 * cache what was actually applied.
2998 		 */
2999 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3000 				       VMXNET3_CMD_GET_RSS_FIELDS);
3001 		adapter->rss_fields =
3002 			VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3003 	}
3004 
3005 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3006 }
3007 
3008 int
vmxnet3_activate_dev(struct vmxnet3_adapter * adapter)3009 vmxnet3_activate_dev(struct vmxnet3_adapter *adapter)
3010 {
3011 	int err, i;
3012 	u32 ret;
3013 	unsigned long flags;
3014 
3015 	netdev_dbg(adapter->netdev, "%s: skb_buf_size %d, rx_buf_per_pkt %d,"
3016 		" ring sizes %u %u %u\n", adapter->netdev->name,
3017 		adapter->skb_buf_size, adapter->rx_buf_per_pkt,
3018 		adapter->tx_queue[0].tx_ring.size,
3019 		adapter->rx_queue[0].rx_ring[0].size,
3020 		adapter->rx_queue[0].rx_ring[1].size);
3021 
3022 	vmxnet3_tq_init_all(adapter);
3023 	err = vmxnet3_rq_init_all(adapter);
3024 	if (err) {
3025 		netdev_err(adapter->netdev,
3026 			   "Failed to init rx queue error %d\n", err);
3027 		goto rq_err;
3028 	}
3029 
3030 	err = vmxnet3_request_irqs(adapter);
3031 	if (err) {
3032 		netdev_err(adapter->netdev,
3033 			   "Failed to setup irq for error %d\n", err);
3034 		goto irq_err;
3035 	}
3036 
3037 	vmxnet3_setup_driver_shared(adapter);
3038 
3039 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, VMXNET3_GET_ADDR_LO(
3040 			       adapter->shared_pa));
3041 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, VMXNET3_GET_ADDR_HI(
3042 			       adapter->shared_pa));
3043 	spin_lock_irqsave(&adapter->cmd_lock, flags);
3044 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3045 			       VMXNET3_CMD_ACTIVATE_DEV);
3046 	ret = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3047 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3048 
3049 	if (ret != 0) {
3050 		netdev_err(adapter->netdev,
3051 			   "Failed to activate dev: error %u\n", ret);
3052 		err = -EINVAL;
3053 		goto activate_err;
3054 	}
3055 
3056 	vmxnet3_init_bufsize(adapter);
3057 	vmxnet3_init_coalesce(adapter);
3058 	vmxnet3_init_rssfields(adapter);
3059 
3060 	for (i = 0; i < adapter->num_rx_queues; i++) {
3061 		VMXNET3_WRITE_BAR0_REG(adapter,
3062 				adapter->rx_prod_offset + i * VMXNET3_REG_ALIGN,
3063 				adapter->rx_queue[i].rx_ring[0].next2fill);
3064 		VMXNET3_WRITE_BAR0_REG(adapter, (adapter->rx_prod2_offset +
3065 				(i * VMXNET3_REG_ALIGN)),
3066 				adapter->rx_queue[i].rx_ring[1].next2fill);
3067 	}
3068 
3069 	/* Apply the rx filter settins last. */
3070 	vmxnet3_set_mc(adapter->netdev);
3071 
3072 	/*
3073 	 * Check link state when first activating device. It will start the
3074 	 * tx queue if the link is up.
3075 	 */
3076 	vmxnet3_check_link(adapter, true);
3077 	netif_tx_wake_all_queues(adapter->netdev);
3078 	for (i = 0; i < adapter->num_rx_queues; i++)
3079 		napi_enable(&adapter->rx_queue[i].napi);
3080 	vmxnet3_enable_all_intrs(adapter);
3081 	clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3082 	return 0;
3083 
3084 activate_err:
3085 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAL, 0);
3086 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DSAH, 0);
3087 	vmxnet3_free_irqs(adapter);
3088 irq_err:
3089 rq_err:
3090 	/* free up buffers we allocated */
3091 	vmxnet3_rq_cleanup_all(adapter);
3092 	return err;
3093 }
3094 
3095 
3096 void
vmxnet3_reset_dev(struct vmxnet3_adapter * adapter)3097 vmxnet3_reset_dev(struct vmxnet3_adapter *adapter)
3098 {
3099 	unsigned long flags;
3100 	spin_lock_irqsave(&adapter->cmd_lock, flags);
3101 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
3102 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3103 }
3104 
3105 
3106 int
vmxnet3_quiesce_dev(struct vmxnet3_adapter * adapter)3107 vmxnet3_quiesce_dev(struct vmxnet3_adapter *adapter)
3108 {
3109 	int i;
3110 	unsigned long flags;
3111 	if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state))
3112 		return 0;
3113 
3114 
3115 	spin_lock_irqsave(&adapter->cmd_lock, flags);
3116 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3117 			       VMXNET3_CMD_QUIESCE_DEV);
3118 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3119 	vmxnet3_disable_all_intrs(adapter);
3120 
3121 	for (i = 0; i < adapter->num_rx_queues; i++)
3122 		napi_disable(&adapter->rx_queue[i].napi);
3123 	netif_tx_disable(adapter->netdev);
3124 	adapter->link_speed = 0;
3125 	netif_carrier_off(adapter->netdev);
3126 
3127 	vmxnet3_tq_cleanup_all(adapter);
3128 	vmxnet3_rq_cleanup_all(adapter);
3129 	vmxnet3_free_irqs(adapter);
3130 	return 0;
3131 }
3132 
3133 
3134 static void
vmxnet3_write_mac_addr(struct vmxnet3_adapter * adapter,const u8 * mac)3135 vmxnet3_write_mac_addr(struct vmxnet3_adapter *adapter, const u8 *mac)
3136 {
3137 	u32 tmp;
3138 
3139 	tmp = *(u32 *)mac;
3140 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACL, tmp);
3141 
3142 	tmp = (mac[5] << 8) | mac[4];
3143 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_MACH, tmp);
3144 }
3145 
3146 
3147 static int
vmxnet3_set_mac_addr(struct net_device * netdev,void * p)3148 vmxnet3_set_mac_addr(struct net_device *netdev, void *p)
3149 {
3150 	struct sockaddr *addr = p;
3151 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3152 
3153 	dev_addr_set(netdev, addr->sa_data);
3154 	vmxnet3_write_mac_addr(adapter, addr->sa_data);
3155 
3156 	return 0;
3157 }
3158 
3159 
3160 /* ==================== initialization and cleanup routines ============ */
3161 
3162 static int
vmxnet3_alloc_pci_resources(struct vmxnet3_adapter * adapter)3163 vmxnet3_alloc_pci_resources(struct vmxnet3_adapter *adapter)
3164 {
3165 	int err;
3166 	unsigned long mmio_start, mmio_len;
3167 	struct pci_dev *pdev = adapter->pdev;
3168 
3169 	err = pci_enable_device(pdev);
3170 	if (err) {
3171 		dev_err(&pdev->dev, "Failed to enable adapter: error %d\n", err);
3172 		return err;
3173 	}
3174 
3175 	err = pci_request_selected_regions(pdev, (1 << 2) - 1,
3176 					   vmxnet3_driver_name);
3177 	if (err) {
3178 		dev_err(&pdev->dev,
3179 			"Failed to request region for adapter: error %d\n", err);
3180 		goto err_enable_device;
3181 	}
3182 
3183 	pci_set_master(pdev);
3184 
3185 	mmio_start = pci_resource_start(pdev, 0);
3186 	mmio_len = pci_resource_len(pdev, 0);
3187 	adapter->hw_addr0 = ioremap(mmio_start, mmio_len);
3188 	if (!adapter->hw_addr0) {
3189 		dev_err(&pdev->dev, "Failed to map bar0\n");
3190 		err = -EIO;
3191 		goto err_ioremap;
3192 	}
3193 
3194 	mmio_start = pci_resource_start(pdev, 1);
3195 	mmio_len = pci_resource_len(pdev, 1);
3196 	adapter->hw_addr1 = ioremap(mmio_start, mmio_len);
3197 	if (!adapter->hw_addr1) {
3198 		dev_err(&pdev->dev, "Failed to map bar1\n");
3199 		err = -EIO;
3200 		goto err_bar1;
3201 	}
3202 	return 0;
3203 
3204 err_bar1:
3205 	iounmap(adapter->hw_addr0);
3206 err_ioremap:
3207 	pci_release_selected_regions(pdev, (1 << 2) - 1);
3208 err_enable_device:
3209 	pci_disable_device(pdev);
3210 	return err;
3211 }
3212 
3213 
3214 static void
vmxnet3_free_pci_resources(struct vmxnet3_adapter * adapter)3215 vmxnet3_free_pci_resources(struct vmxnet3_adapter *adapter)
3216 {
3217 	BUG_ON(!adapter->pdev);
3218 
3219 	iounmap(adapter->hw_addr0);
3220 	iounmap(adapter->hw_addr1);
3221 	pci_release_selected_regions(adapter->pdev, (1 << 2) - 1);
3222 	pci_disable_device(adapter->pdev);
3223 }
3224 
3225 
3226 void
vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter * adapter)3227 vmxnet3_adjust_rx_ring_size(struct vmxnet3_adapter *adapter)
3228 {
3229 	size_t sz, i, ring0_size, ring1_size, comp_size;
3230 	/* With version7 ring1 will have only T0 buffers */
3231 	if (!VMXNET3_VERSION_GE_7(adapter)) {
3232 		if (adapter->netdev->mtu <= VMXNET3_MAX_SKB_BUF_SIZE -
3233 					    VMXNET3_MAX_ETH_HDR_SIZE) {
3234 			adapter->skb_buf_size = adapter->netdev->mtu +
3235 						VMXNET3_MAX_ETH_HDR_SIZE;
3236 			if (adapter->skb_buf_size < VMXNET3_MIN_T0_BUF_SIZE)
3237 				adapter->skb_buf_size = VMXNET3_MIN_T0_BUF_SIZE;
3238 
3239 			adapter->rx_buf_per_pkt = 1;
3240 		} else {
3241 			adapter->skb_buf_size = VMXNET3_MAX_SKB_BUF_SIZE;
3242 			sz = adapter->netdev->mtu - VMXNET3_MAX_SKB_BUF_SIZE +
3243 						    VMXNET3_MAX_ETH_HDR_SIZE;
3244 			adapter->rx_buf_per_pkt = 1 + (sz + PAGE_SIZE - 1) / PAGE_SIZE;
3245 		}
3246 	} else {
3247 		adapter->skb_buf_size = min((int)adapter->netdev->mtu + VMXNET3_MAX_ETH_HDR_SIZE,
3248 					    VMXNET3_MAX_SKB_BUF_SIZE);
3249 		adapter->rx_buf_per_pkt = 1;
3250 		adapter->ringBufSize.ring1BufSizeType0 = cpu_to_le16(adapter->skb_buf_size);
3251 		adapter->ringBufSize.ring1BufSizeType1 = 0;
3252 		adapter->ringBufSize.ring2BufSizeType1 = cpu_to_le16(PAGE_SIZE);
3253 	}
3254 
3255 	/*
3256 	 * for simplicity, force the ring0 size to be a multiple of
3257 	 * rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN
3258 	 */
3259 	sz = adapter->rx_buf_per_pkt * VMXNET3_RING_SIZE_ALIGN;
3260 	ring0_size = adapter->rx_queue[0].rx_ring[0].size;
3261 	ring0_size = (ring0_size + sz - 1) / sz * sz;
3262 	ring0_size = min_t(u32, ring0_size, VMXNET3_RX_RING_MAX_SIZE /
3263 			   sz * sz);
3264 	ring1_size = adapter->rx_queue[0].rx_ring[1].size;
3265 	ring1_size = (ring1_size + sz - 1) / sz * sz;
3266 	ring1_size = min_t(u32, ring1_size, VMXNET3_RX_RING2_MAX_SIZE /
3267 			   sz * sz);
3268 	/* For v7 and later, keep ring size power of 2 for UPT */
3269 	if (VMXNET3_VERSION_GE_7(adapter)) {
3270 		ring0_size = rounddown_pow_of_two(ring0_size);
3271 		ring1_size = rounddown_pow_of_two(ring1_size);
3272 	}
3273 	comp_size = ring0_size + ring1_size;
3274 
3275 	for (i = 0; i < adapter->num_rx_queues; i++) {
3276 		struct vmxnet3_rx_queue	*rq = &adapter->rx_queue[i];
3277 
3278 		rq->rx_ring[0].size = ring0_size;
3279 		rq->rx_ring[1].size = ring1_size;
3280 		rq->comp_ring.size = comp_size;
3281 	}
3282 }
3283 
3284 
3285 int
vmxnet3_create_queues(struct vmxnet3_adapter * adapter,u32 tx_ring_size,u32 rx_ring_size,u32 rx_ring2_size,u16 txdata_desc_size,u16 rxdata_desc_size)3286 vmxnet3_create_queues(struct vmxnet3_adapter *adapter, u32 tx_ring_size,
3287 		      u32 rx_ring_size, u32 rx_ring2_size,
3288 		      u16 txdata_desc_size, u16 rxdata_desc_size)
3289 {
3290 	int err = 0, i;
3291 
3292 	for (i = 0; i < adapter->num_tx_queues; i++) {
3293 		struct vmxnet3_tx_queue	*tq = &adapter->tx_queue[i];
3294 		tq->tx_ring.size   = tx_ring_size;
3295 		tq->data_ring.size = tx_ring_size;
3296 		tq->comp_ring.size = tx_ring_size;
3297 		tq->txdata_desc_size = txdata_desc_size;
3298 		tq->shared = &adapter->tqd_start[i].ctrl;
3299 		tq->stopped = true;
3300 		tq->adapter = adapter;
3301 		tq->qid = i;
3302 		err = vmxnet3_tq_create(tq, adapter);
3303 		/*
3304 		 * Too late to change num_tx_queues. We cannot do away with
3305 		 * lesser number of queues than what we asked for
3306 		 */
3307 		if (err)
3308 			goto queue_err;
3309 	}
3310 
3311 	adapter->rx_queue[0].rx_ring[0].size = rx_ring_size;
3312 	adapter->rx_queue[0].rx_ring[1].size = rx_ring2_size;
3313 	vmxnet3_adjust_rx_ring_size(adapter);
3314 
3315 	adapter->rxdataring_enabled = VMXNET3_VERSION_GE_3(adapter);
3316 	for (i = 0; i < adapter->num_rx_queues; i++) {
3317 		struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i];
3318 		/* qid and qid2 for rx queues will be assigned later when num
3319 		 * of rx queues is finalized after allocating intrs */
3320 		rq->shared = &adapter->rqd_start[i].ctrl;
3321 		rq->adapter = adapter;
3322 		rq->data_ring.desc_size = rxdata_desc_size;
3323 		err = vmxnet3_rq_create(rq, adapter);
3324 		if (err) {
3325 			if (i == 0) {
3326 				netdev_err(adapter->netdev,
3327 					   "Could not allocate any rx queues. "
3328 					   "Aborting.\n");
3329 				goto queue_err;
3330 			} else {
3331 				netdev_info(adapter->netdev,
3332 					    "Number of rx queues changed "
3333 					    "to : %d.\n", i);
3334 				adapter->num_rx_queues = i;
3335 				err = 0;
3336 				break;
3337 			}
3338 		}
3339 	}
3340 
3341 	if (!adapter->rxdataring_enabled)
3342 		vmxnet3_rq_destroy_all_rxdataring(adapter);
3343 
3344 	return err;
3345 queue_err:
3346 	vmxnet3_tq_destroy_all(adapter);
3347 	return err;
3348 }
3349 
3350 static int
vmxnet3_open(struct net_device * netdev)3351 vmxnet3_open(struct net_device *netdev)
3352 {
3353 	struct vmxnet3_adapter *adapter;
3354 	int err, i;
3355 
3356 	adapter = netdev_priv(netdev);
3357 
3358 	for (i = 0; i < adapter->num_tx_queues; i++)
3359 		spin_lock_init(&adapter->tx_queue[i].tx_lock);
3360 
3361 	if (VMXNET3_VERSION_GE_3(adapter)) {
3362 		unsigned long flags;
3363 		u16 txdata_desc_size;
3364 
3365 		spin_lock_irqsave(&adapter->cmd_lock, flags);
3366 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3367 				       VMXNET3_CMD_GET_TXDATA_DESC_SIZE);
3368 		txdata_desc_size = VMXNET3_READ_BAR1_REG(adapter,
3369 							 VMXNET3_REG_CMD);
3370 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3371 
3372 		if ((txdata_desc_size < VMXNET3_TXDATA_DESC_MIN_SIZE) ||
3373 		    (txdata_desc_size > VMXNET3_TXDATA_DESC_MAX_SIZE) ||
3374 		    (txdata_desc_size & VMXNET3_TXDATA_DESC_SIZE_MASK)) {
3375 			adapter->txdata_desc_size =
3376 				sizeof(struct Vmxnet3_TxDataDesc);
3377 		} else {
3378 			adapter->txdata_desc_size = txdata_desc_size;
3379 		}
3380 	} else {
3381 		adapter->txdata_desc_size = sizeof(struct Vmxnet3_TxDataDesc);
3382 	}
3383 
3384 	err = vmxnet3_create_queues(adapter,
3385 				    adapter->tx_ring_size,
3386 				    adapter->rx_ring_size,
3387 				    adapter->rx_ring2_size,
3388 				    adapter->txdata_desc_size,
3389 				    adapter->rxdata_desc_size);
3390 	if (err)
3391 		goto queue_err;
3392 
3393 	err = vmxnet3_activate_dev(adapter);
3394 	if (err)
3395 		goto activate_err;
3396 
3397 	return 0;
3398 
3399 activate_err:
3400 	vmxnet3_rq_destroy_all(adapter);
3401 	vmxnet3_tq_destroy_all(adapter);
3402 queue_err:
3403 	return err;
3404 }
3405 
3406 
3407 static int
vmxnet3_close(struct net_device * netdev)3408 vmxnet3_close(struct net_device *netdev)
3409 {
3410 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3411 
3412 	/*
3413 	 * Reset_work may be in the middle of resetting the device, wait for its
3414 	 * completion.
3415 	 */
3416 	while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3417 		usleep_range(1000, 2000);
3418 
3419 	vmxnet3_quiesce_dev(adapter);
3420 
3421 	vmxnet3_rq_destroy_all(adapter);
3422 	vmxnet3_tq_destroy_all(adapter);
3423 
3424 	clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3425 
3426 
3427 	return 0;
3428 }
3429 
3430 
3431 void
vmxnet3_force_close(struct vmxnet3_adapter * adapter)3432 vmxnet3_force_close(struct vmxnet3_adapter *adapter)
3433 {
3434 	int i;
3435 
3436 	/*
3437 	 * we must clear VMXNET3_STATE_BIT_RESETTING, otherwise
3438 	 * vmxnet3_close() will deadlock.
3439 	 */
3440 	BUG_ON(test_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state));
3441 
3442 	/* we need to enable NAPI, otherwise dev_close will deadlock */
3443 	for (i = 0; i < adapter->num_rx_queues; i++)
3444 		napi_enable(&adapter->rx_queue[i].napi);
3445 	/*
3446 	 * Need to clear the quiesce bit to ensure that vmxnet3_close
3447 	 * can quiesce the device properly
3448 	 */
3449 	clear_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
3450 	dev_close(adapter->netdev);
3451 }
3452 
3453 
3454 static int
vmxnet3_change_mtu(struct net_device * netdev,int new_mtu)3455 vmxnet3_change_mtu(struct net_device *netdev, int new_mtu)
3456 {
3457 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3458 	int err = 0;
3459 
3460 	netdev->mtu = new_mtu;
3461 
3462 	/*
3463 	 * Reset_work may be in the middle of resetting the device, wait for its
3464 	 * completion.
3465 	 */
3466 	while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3467 		usleep_range(1000, 2000);
3468 
3469 	if (netif_running(netdev)) {
3470 		vmxnet3_quiesce_dev(adapter);
3471 		vmxnet3_reset_dev(adapter);
3472 
3473 		/* we need to re-create the rx queue based on the new mtu */
3474 		vmxnet3_rq_destroy_all(adapter);
3475 		vmxnet3_adjust_rx_ring_size(adapter);
3476 		err = vmxnet3_rq_create_all(adapter);
3477 		if (err) {
3478 			netdev_err(netdev,
3479 				   "failed to re-create rx queues, "
3480 				   " error %d. Closing it.\n", err);
3481 			goto out;
3482 		}
3483 
3484 		err = vmxnet3_activate_dev(adapter);
3485 		if (err) {
3486 			netdev_err(netdev,
3487 				   "failed to re-activate, error %d. "
3488 				   "Closing it\n", err);
3489 			goto out;
3490 		}
3491 	}
3492 
3493 out:
3494 	clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3495 	if (err)
3496 		vmxnet3_force_close(adapter);
3497 
3498 	return err;
3499 }
3500 
3501 
3502 static void
vmxnet3_declare_features(struct vmxnet3_adapter * adapter)3503 vmxnet3_declare_features(struct vmxnet3_adapter *adapter)
3504 {
3505 	struct net_device *netdev = adapter->netdev;
3506 
3507 	netdev->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
3508 		NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
3509 		NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
3510 		NETIF_F_LRO | NETIF_F_HIGHDMA;
3511 
3512 	if (VMXNET3_VERSION_GE_4(adapter)) {
3513 		netdev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
3514 				NETIF_F_GSO_UDP_TUNNEL_CSUM;
3515 
3516 		netdev->hw_enc_features = NETIF_F_SG | NETIF_F_RXCSUM |
3517 			NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_TX |
3518 			NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_TSO | NETIF_F_TSO6 |
3519 			NETIF_F_LRO | NETIF_F_GSO_UDP_TUNNEL |
3520 			NETIF_F_GSO_UDP_TUNNEL_CSUM;
3521 	}
3522 
3523 	if (VMXNET3_VERSION_GE_7(adapter)) {
3524 		unsigned long flags;
3525 
3526 		if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
3527 					       VMXNET3_CAP_GENEVE_CHECKSUM_OFFLOAD)) {
3528 			adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_GENEVE_CHECKSUM_OFFLOAD;
3529 		}
3530 		if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
3531 					       VMXNET3_CAP_VXLAN_CHECKSUM_OFFLOAD)) {
3532 			adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_VXLAN_CHECKSUM_OFFLOAD;
3533 		}
3534 		if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
3535 					       VMXNET3_CAP_GENEVE_TSO)) {
3536 			adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_GENEVE_TSO;
3537 		}
3538 		if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
3539 					       VMXNET3_CAP_VXLAN_TSO)) {
3540 			adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_VXLAN_TSO;
3541 		}
3542 		if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
3543 					       VMXNET3_CAP_GENEVE_OUTER_CHECKSUM_OFFLOAD)) {
3544 			adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_GENEVE_OUTER_CHECKSUM_OFFLOAD;
3545 		}
3546 		if (vmxnet3_check_ptcapability(adapter->ptcap_supported[0],
3547 					       VMXNET3_CAP_VXLAN_OUTER_CHECKSUM_OFFLOAD)) {
3548 			adapter->dev_caps[0] |= 1UL << VMXNET3_CAP_VXLAN_OUTER_CHECKSUM_OFFLOAD;
3549 		}
3550 
3551 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]);
3552 		spin_lock_irqsave(&adapter->cmd_lock, flags);
3553 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DCR0_REG);
3554 		adapter->dev_caps[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3555 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3556 
3557 		if (!(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_GENEVE_CHECKSUM_OFFLOAD)) &&
3558 		    !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_VXLAN_CHECKSUM_OFFLOAD)) &&
3559 		    !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_GENEVE_TSO)) &&
3560 		    !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_VXLAN_TSO))) {
3561 			netdev->hw_enc_features &= ~NETIF_F_GSO_UDP_TUNNEL;
3562 			netdev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL;
3563 		}
3564 		if (!(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_GENEVE_OUTER_CHECKSUM_OFFLOAD)) &&
3565 		    !(adapter->dev_caps[0] & (1UL << VMXNET3_CAP_VXLAN_OUTER_CHECKSUM_OFFLOAD))) {
3566 			netdev->hw_enc_features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM;
3567 			netdev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL_CSUM;
3568 		}
3569 	}
3570 
3571 	netdev->vlan_features = netdev->hw_features &
3572 				~(NETIF_F_HW_VLAN_CTAG_TX |
3573 				  NETIF_F_HW_VLAN_CTAG_RX);
3574 	netdev->features = netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
3575 }
3576 
3577 
3578 static void
vmxnet3_read_mac_addr(struct vmxnet3_adapter * adapter,u8 * mac)3579 vmxnet3_read_mac_addr(struct vmxnet3_adapter *adapter, u8 *mac)
3580 {
3581 	u32 tmp;
3582 
3583 	tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACL);
3584 	*(u32 *)mac = tmp;
3585 
3586 	tmp = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_MACH);
3587 	mac[4] = tmp & 0xff;
3588 	mac[5] = (tmp >> 8) & 0xff;
3589 }
3590 
3591 #ifdef CONFIG_PCI_MSI
3592 
3593 /*
3594  * Enable MSIx vectors.
3595  * Returns :
3596  *	VMXNET3_LINUX_MIN_MSIX_VECT when only minimum number of vectors required
3597  *	 were enabled.
3598  *	number of vectors which were enabled otherwise (this number is greater
3599  *	 than VMXNET3_LINUX_MIN_MSIX_VECT)
3600  */
3601 
3602 static int
vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter * adapter,int nvec)3603 vmxnet3_acquire_msix_vectors(struct vmxnet3_adapter *adapter, int nvec)
3604 {
3605 	int ret = pci_enable_msix_range(adapter->pdev,
3606 					adapter->intr.msix_entries, nvec, nvec);
3607 
3608 	if (ret == -ENOSPC && nvec > VMXNET3_LINUX_MIN_MSIX_VECT) {
3609 		dev_err(&adapter->netdev->dev,
3610 			"Failed to enable %d MSI-X, trying %d\n",
3611 			nvec, VMXNET3_LINUX_MIN_MSIX_VECT);
3612 
3613 		ret = pci_enable_msix_range(adapter->pdev,
3614 					    adapter->intr.msix_entries,
3615 					    VMXNET3_LINUX_MIN_MSIX_VECT,
3616 					    VMXNET3_LINUX_MIN_MSIX_VECT);
3617 	}
3618 
3619 	if (ret < 0) {
3620 		dev_err(&adapter->netdev->dev,
3621 			"Failed to enable MSI-X, error: %d\n", ret);
3622 	}
3623 
3624 	return ret;
3625 }
3626 
3627 
3628 #endif /* CONFIG_PCI_MSI */
3629 
3630 static void
vmxnet3_alloc_intr_resources(struct vmxnet3_adapter * adapter)3631 vmxnet3_alloc_intr_resources(struct vmxnet3_adapter *adapter)
3632 {
3633 	u32 cfg;
3634 	unsigned long flags;
3635 
3636 	/* intr settings */
3637 	spin_lock_irqsave(&adapter->cmd_lock, flags);
3638 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3639 			       VMXNET3_CMD_GET_CONF_INTR);
3640 	cfg = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3641 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3642 	adapter->intr.type = cfg & 0x3;
3643 	adapter->intr.mask_mode = (cfg >> 2) & 0x3;
3644 
3645 	if (adapter->intr.type == VMXNET3_IT_AUTO) {
3646 		adapter->intr.type = VMXNET3_IT_MSIX;
3647 	}
3648 
3649 #ifdef CONFIG_PCI_MSI
3650 	if (adapter->intr.type == VMXNET3_IT_MSIX) {
3651 		int i, nvec, nvec_allocated;
3652 
3653 		nvec  = adapter->share_intr == VMXNET3_INTR_TXSHARE ?
3654 			1 : adapter->num_tx_queues;
3655 		nvec += adapter->share_intr == VMXNET3_INTR_BUDDYSHARE ?
3656 			0 : adapter->num_rx_queues;
3657 		nvec += 1;	/* for link event */
3658 		nvec = nvec > VMXNET3_LINUX_MIN_MSIX_VECT ?
3659 		       nvec : VMXNET3_LINUX_MIN_MSIX_VECT;
3660 
3661 		for (i = 0; i < nvec; i++)
3662 			adapter->intr.msix_entries[i].entry = i;
3663 
3664 		nvec_allocated = vmxnet3_acquire_msix_vectors(adapter, nvec);
3665 		if (nvec_allocated < 0)
3666 			goto msix_err;
3667 
3668 		/* If we cannot allocate one MSIx vector per queue
3669 		 * then limit the number of rx queues to 1
3670 		 */
3671 		if (nvec_allocated == VMXNET3_LINUX_MIN_MSIX_VECT &&
3672 		    nvec != VMXNET3_LINUX_MIN_MSIX_VECT) {
3673 			if (adapter->share_intr != VMXNET3_INTR_BUDDYSHARE
3674 			    || adapter->num_rx_queues != 1) {
3675 				adapter->share_intr = VMXNET3_INTR_TXSHARE;
3676 				netdev_err(adapter->netdev,
3677 					   "Number of rx queues : 1\n");
3678 				adapter->num_rx_queues = 1;
3679 			}
3680 		}
3681 
3682 		adapter->intr.num_intrs = nvec_allocated;
3683 		return;
3684 
3685 msix_err:
3686 		/* If we cannot allocate MSIx vectors use only one rx queue */
3687 		dev_info(&adapter->pdev->dev,
3688 			 "Failed to enable MSI-X, error %d. "
3689 			 "Limiting #rx queues to 1, try MSI.\n", nvec_allocated);
3690 
3691 		adapter->intr.type = VMXNET3_IT_MSI;
3692 	}
3693 
3694 	if (adapter->intr.type == VMXNET3_IT_MSI) {
3695 		if (!pci_enable_msi(adapter->pdev)) {
3696 			adapter->num_rx_queues = 1;
3697 			adapter->intr.num_intrs = 1;
3698 			return;
3699 		}
3700 	}
3701 #endif /* CONFIG_PCI_MSI */
3702 
3703 	adapter->num_rx_queues = 1;
3704 	dev_info(&adapter->netdev->dev,
3705 		 "Using INTx interrupt, #Rx queues: 1.\n");
3706 	adapter->intr.type = VMXNET3_IT_INTX;
3707 
3708 	/* INT-X related setting */
3709 	adapter->intr.num_intrs = 1;
3710 }
3711 
3712 
3713 static void
vmxnet3_free_intr_resources(struct vmxnet3_adapter * adapter)3714 vmxnet3_free_intr_resources(struct vmxnet3_adapter *adapter)
3715 {
3716 	if (adapter->intr.type == VMXNET3_IT_MSIX)
3717 		pci_disable_msix(adapter->pdev);
3718 	else if (adapter->intr.type == VMXNET3_IT_MSI)
3719 		pci_disable_msi(adapter->pdev);
3720 	else
3721 		BUG_ON(adapter->intr.type != VMXNET3_IT_INTX);
3722 }
3723 
3724 
3725 static void
vmxnet3_tx_timeout(struct net_device * netdev,unsigned int txqueue)3726 vmxnet3_tx_timeout(struct net_device *netdev, unsigned int txqueue)
3727 {
3728 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
3729 	adapter->tx_timeout_count++;
3730 
3731 	netdev_err(adapter->netdev, "tx hang\n");
3732 	schedule_work(&adapter->work);
3733 }
3734 
3735 
3736 static void
vmxnet3_reset_work(struct work_struct * data)3737 vmxnet3_reset_work(struct work_struct *data)
3738 {
3739 	struct vmxnet3_adapter *adapter;
3740 
3741 	adapter = container_of(data, struct vmxnet3_adapter, work);
3742 
3743 	/* if another thread is resetting the device, no need to proceed */
3744 	if (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
3745 		return;
3746 
3747 	/* if the device is closed, we must leave it alone */
3748 	rtnl_lock();
3749 	if (netif_running(adapter->netdev)) {
3750 		netdev_notice(adapter->netdev, "resetting\n");
3751 		vmxnet3_quiesce_dev(adapter);
3752 		vmxnet3_reset_dev(adapter);
3753 		vmxnet3_activate_dev(adapter);
3754 	} else {
3755 		netdev_info(adapter->netdev, "already closed\n");
3756 	}
3757 	rtnl_unlock();
3758 
3759 	netif_wake_queue(adapter->netdev);
3760 	clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
3761 }
3762 
3763 
3764 static int
vmxnet3_probe_device(struct pci_dev * pdev,const struct pci_device_id * id)3765 vmxnet3_probe_device(struct pci_dev *pdev,
3766 		     const struct pci_device_id *id)
3767 {
3768 	static const struct net_device_ops vmxnet3_netdev_ops = {
3769 		.ndo_open = vmxnet3_open,
3770 		.ndo_stop = vmxnet3_close,
3771 		.ndo_start_xmit = vmxnet3_xmit_frame,
3772 		.ndo_set_mac_address = vmxnet3_set_mac_addr,
3773 		.ndo_change_mtu = vmxnet3_change_mtu,
3774 		.ndo_fix_features = vmxnet3_fix_features,
3775 		.ndo_set_features = vmxnet3_set_features,
3776 		.ndo_features_check = vmxnet3_features_check,
3777 		.ndo_get_stats64 = vmxnet3_get_stats64,
3778 		.ndo_tx_timeout = vmxnet3_tx_timeout,
3779 		.ndo_set_rx_mode = vmxnet3_set_mc,
3780 		.ndo_vlan_rx_add_vid = vmxnet3_vlan_rx_add_vid,
3781 		.ndo_vlan_rx_kill_vid = vmxnet3_vlan_rx_kill_vid,
3782 #ifdef CONFIG_NET_POLL_CONTROLLER
3783 		.ndo_poll_controller = vmxnet3_netpoll,
3784 #endif
3785 		.ndo_bpf = vmxnet3_xdp,
3786 		.ndo_xdp_xmit = vmxnet3_xdp_xmit,
3787 	};
3788 	int err;
3789 	u32 ver;
3790 	struct net_device *netdev;
3791 	struct vmxnet3_adapter *adapter;
3792 	u8 mac[ETH_ALEN];
3793 	int size;
3794 	int num_tx_queues;
3795 	int num_rx_queues;
3796 	int queues;
3797 	unsigned long flags;
3798 
3799 	if (!pci_msi_enabled())
3800 		enable_mq = 0;
3801 
3802 #ifdef VMXNET3_RSS
3803 	if (enable_mq)
3804 		num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
3805 				    (int)num_online_cpus());
3806 	else
3807 #endif
3808 		num_rx_queues = 1;
3809 
3810 	if (enable_mq)
3811 		num_tx_queues = min(VMXNET3_DEVICE_MAX_TX_QUEUES,
3812 				    (int)num_online_cpus());
3813 	else
3814 		num_tx_queues = 1;
3815 
3816 	netdev = alloc_etherdev_mq(sizeof(struct vmxnet3_adapter),
3817 				   max(num_tx_queues, num_rx_queues));
3818 	if (!netdev)
3819 		return -ENOMEM;
3820 
3821 	pci_set_drvdata(pdev, netdev);
3822 	adapter = netdev_priv(netdev);
3823 	adapter->netdev = netdev;
3824 	adapter->pdev = pdev;
3825 
3826 	adapter->tx_ring_size = VMXNET3_DEF_TX_RING_SIZE;
3827 	adapter->rx_ring_size = VMXNET3_DEF_RX_RING_SIZE;
3828 	adapter->rx_ring2_size = VMXNET3_DEF_RX_RING2_SIZE;
3829 
3830 	err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3831 	if (err) {
3832 		dev_err(&pdev->dev, "dma_set_mask failed\n");
3833 		goto err_set_mask;
3834 	}
3835 
3836 	spin_lock_init(&adapter->cmd_lock);
3837 	adapter->adapter_pa = dma_map_single(&adapter->pdev->dev, adapter,
3838 					     sizeof(struct vmxnet3_adapter),
3839 					     DMA_TO_DEVICE);
3840 	if (dma_mapping_error(&adapter->pdev->dev, adapter->adapter_pa)) {
3841 		dev_err(&pdev->dev, "Failed to map dma\n");
3842 		err = -EFAULT;
3843 		goto err_set_mask;
3844 	}
3845 	adapter->shared = dma_alloc_coherent(
3846 				&adapter->pdev->dev,
3847 				sizeof(struct Vmxnet3_DriverShared),
3848 				&adapter->shared_pa, GFP_KERNEL);
3849 	if (!adapter->shared) {
3850 		dev_err(&pdev->dev, "Failed to allocate memory\n");
3851 		err = -ENOMEM;
3852 		goto err_alloc_shared;
3853 	}
3854 
3855 	err = vmxnet3_alloc_pci_resources(adapter);
3856 	if (err < 0)
3857 		goto err_alloc_pci;
3858 
3859 	ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_VRRS);
3860 	if (ver & (1 << VMXNET3_REV_7)) {
3861 		VMXNET3_WRITE_BAR1_REG(adapter,
3862 				       VMXNET3_REG_VRRS,
3863 				       1 << VMXNET3_REV_7);
3864 		adapter->version = VMXNET3_REV_7 + 1;
3865 	} else if (ver & (1 << VMXNET3_REV_6)) {
3866 		VMXNET3_WRITE_BAR1_REG(adapter,
3867 				       VMXNET3_REG_VRRS,
3868 				       1 << VMXNET3_REV_6);
3869 		adapter->version = VMXNET3_REV_6 + 1;
3870 	} else if (ver & (1 << VMXNET3_REV_5)) {
3871 		VMXNET3_WRITE_BAR1_REG(adapter,
3872 				       VMXNET3_REG_VRRS,
3873 				       1 << VMXNET3_REV_5);
3874 		adapter->version = VMXNET3_REV_5 + 1;
3875 	} else if (ver & (1 << VMXNET3_REV_4)) {
3876 		VMXNET3_WRITE_BAR1_REG(adapter,
3877 				       VMXNET3_REG_VRRS,
3878 				       1 << VMXNET3_REV_4);
3879 		adapter->version = VMXNET3_REV_4 + 1;
3880 	} else if (ver & (1 << VMXNET3_REV_3)) {
3881 		VMXNET3_WRITE_BAR1_REG(adapter,
3882 				       VMXNET3_REG_VRRS,
3883 				       1 << VMXNET3_REV_3);
3884 		adapter->version = VMXNET3_REV_3 + 1;
3885 	} else if (ver & (1 << VMXNET3_REV_2)) {
3886 		VMXNET3_WRITE_BAR1_REG(adapter,
3887 				       VMXNET3_REG_VRRS,
3888 				       1 << VMXNET3_REV_2);
3889 		adapter->version = VMXNET3_REV_2 + 1;
3890 	} else if (ver & (1 << VMXNET3_REV_1)) {
3891 		VMXNET3_WRITE_BAR1_REG(adapter,
3892 				       VMXNET3_REG_VRRS,
3893 				       1 << VMXNET3_REV_1);
3894 		adapter->version = VMXNET3_REV_1 + 1;
3895 	} else {
3896 		dev_err(&pdev->dev,
3897 			"Incompatible h/w version (0x%x) for adapter\n", ver);
3898 		err = -EBUSY;
3899 		goto err_ver;
3900 	}
3901 	dev_dbg(&pdev->dev, "Using device version %d\n", adapter->version);
3902 
3903 	ver = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_UVRS);
3904 	if (ver & 1) {
3905 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_UVRS, 1);
3906 	} else {
3907 		dev_err(&pdev->dev,
3908 			"Incompatible upt version (0x%x) for adapter\n", ver);
3909 		err = -EBUSY;
3910 		goto err_ver;
3911 	}
3912 
3913 	if (VMXNET3_VERSION_GE_7(adapter)) {
3914 		adapter->devcap_supported[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DCR);
3915 		adapter->ptcap_supported[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_PTCR);
3916 		if (adapter->devcap_supported[0] & (1UL << VMXNET3_CAP_LARGE_BAR)) {
3917 			adapter->dev_caps[0] = adapter->devcap_supported[0] &
3918 							(1UL << VMXNET3_CAP_LARGE_BAR);
3919 		}
3920 		if (!(adapter->ptcap_supported[0] & (1UL << VMXNET3_DCR_ERROR)) &&
3921 		    adapter->ptcap_supported[0] & (1UL << VMXNET3_CAP_OOORX_COMP) &&
3922 		    adapter->devcap_supported[0] & (1UL << VMXNET3_CAP_OOORX_COMP)) {
3923 			adapter->dev_caps[0] |= adapter->devcap_supported[0] &
3924 						(1UL << VMXNET3_CAP_OOORX_COMP);
3925 		}
3926 		if (adapter->dev_caps[0])
3927 			VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]);
3928 
3929 		spin_lock_irqsave(&adapter->cmd_lock, flags);
3930 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, VMXNET3_CMD_GET_DCR0_REG);
3931 		adapter->dev_caps[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3932 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3933 	}
3934 
3935 	if (VMXNET3_VERSION_GE_7(adapter) &&
3936 	    adapter->dev_caps[0] & (1UL << VMXNET3_CAP_LARGE_BAR)) {
3937 		adapter->tx_prod_offset = VMXNET3_REG_LB_TXPROD;
3938 		adapter->rx_prod_offset = VMXNET3_REG_LB_RXPROD;
3939 		adapter->rx_prod2_offset = VMXNET3_REG_LB_RXPROD2;
3940 	} else {
3941 		adapter->tx_prod_offset = VMXNET3_REG_TXPROD;
3942 		adapter->rx_prod_offset = VMXNET3_REG_RXPROD;
3943 		adapter->rx_prod2_offset = VMXNET3_REG_RXPROD2;
3944 	}
3945 
3946 	if (VMXNET3_VERSION_GE_6(adapter)) {
3947 		spin_lock_irqsave(&adapter->cmd_lock, flags);
3948 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
3949 				       VMXNET3_CMD_GET_MAX_QUEUES_CONF);
3950 		queues = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
3951 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
3952 		if (queues > 0) {
3953 			adapter->num_rx_queues = min(num_rx_queues, ((queues >> 8) & 0xff));
3954 			adapter->num_tx_queues = min(num_tx_queues, (queues & 0xff));
3955 		} else {
3956 			adapter->num_rx_queues = min(num_rx_queues,
3957 						     VMXNET3_DEVICE_DEFAULT_RX_QUEUES);
3958 			adapter->num_tx_queues = min(num_tx_queues,
3959 						     VMXNET3_DEVICE_DEFAULT_TX_QUEUES);
3960 		}
3961 		if (adapter->num_rx_queues > VMXNET3_MAX_RX_QUEUES ||
3962 		    adapter->num_tx_queues > VMXNET3_MAX_TX_QUEUES) {
3963 			adapter->queuesExtEnabled = true;
3964 		} else {
3965 			adapter->queuesExtEnabled = false;
3966 		}
3967 	} else {
3968 		adapter->queuesExtEnabled = false;
3969 		num_rx_queues = rounddown_pow_of_two(num_rx_queues);
3970 		num_tx_queues = rounddown_pow_of_two(num_tx_queues);
3971 		adapter->num_rx_queues = min(num_rx_queues,
3972 					     VMXNET3_DEVICE_DEFAULT_RX_QUEUES);
3973 		adapter->num_tx_queues = min(num_tx_queues,
3974 					     VMXNET3_DEVICE_DEFAULT_TX_QUEUES);
3975 	}
3976 	dev_info(&pdev->dev,
3977 		 "# of Tx queues : %d, # of Rx queues : %d\n",
3978 		 adapter->num_tx_queues, adapter->num_rx_queues);
3979 
3980 	adapter->rx_buf_per_pkt = 1;
3981 
3982 	size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
3983 	size += sizeof(struct Vmxnet3_RxQueueDesc) * adapter->num_rx_queues;
3984 	adapter->tqd_start = dma_alloc_coherent(&adapter->pdev->dev, size,
3985 						&adapter->queue_desc_pa,
3986 						GFP_KERNEL);
3987 
3988 	if (!adapter->tqd_start) {
3989 		dev_err(&pdev->dev, "Failed to allocate memory\n");
3990 		err = -ENOMEM;
3991 		goto err_ver;
3992 	}
3993 	adapter->rqd_start = (struct Vmxnet3_RxQueueDesc *)(adapter->tqd_start +
3994 							    adapter->num_tx_queues);
3995 
3996 	adapter->pm_conf = dma_alloc_coherent(&adapter->pdev->dev,
3997 					      sizeof(struct Vmxnet3_PMConf),
3998 					      &adapter->pm_conf_pa,
3999 					      GFP_KERNEL);
4000 	if (adapter->pm_conf == NULL) {
4001 		err = -ENOMEM;
4002 		goto err_alloc_pm;
4003 	}
4004 
4005 #ifdef VMXNET3_RSS
4006 
4007 	adapter->rss_conf = dma_alloc_coherent(&adapter->pdev->dev,
4008 					       sizeof(struct UPT1_RSSConf),
4009 					       &adapter->rss_conf_pa,
4010 					       GFP_KERNEL);
4011 	if (adapter->rss_conf == NULL) {
4012 		err = -ENOMEM;
4013 		goto err_alloc_rss;
4014 	}
4015 #endif /* VMXNET3_RSS */
4016 
4017 	if (VMXNET3_VERSION_GE_3(adapter)) {
4018 		adapter->coal_conf =
4019 			dma_alloc_coherent(&adapter->pdev->dev,
4020 					   sizeof(struct Vmxnet3_CoalesceScheme)
4021 					   ,
4022 					   &adapter->coal_conf_pa,
4023 					   GFP_KERNEL);
4024 		if (!adapter->coal_conf) {
4025 			err = -ENOMEM;
4026 			goto err_coal_conf;
4027 		}
4028 		adapter->coal_conf->coalMode = VMXNET3_COALESCE_DISABLED;
4029 		adapter->default_coal_mode = true;
4030 	}
4031 
4032 	if (VMXNET3_VERSION_GE_4(adapter)) {
4033 		adapter->default_rss_fields = true;
4034 		adapter->rss_fields = VMXNET3_RSS_FIELDS_DEFAULT;
4035 	}
4036 
4037 	SET_NETDEV_DEV(netdev, &pdev->dev);
4038 	vmxnet3_declare_features(adapter);
4039 	netdev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
4040 			       NETDEV_XDP_ACT_NDO_XMIT;
4041 
4042 	adapter->rxdata_desc_size = VMXNET3_VERSION_GE_3(adapter) ?
4043 		VMXNET3_DEF_RXDATA_DESC_SIZE : 0;
4044 
4045 	if (adapter->num_tx_queues == adapter->num_rx_queues)
4046 		adapter->share_intr = VMXNET3_INTR_BUDDYSHARE;
4047 	else
4048 		adapter->share_intr = VMXNET3_INTR_DONTSHARE;
4049 
4050 	vmxnet3_alloc_intr_resources(adapter);
4051 
4052 #ifdef VMXNET3_RSS
4053 	if (adapter->num_rx_queues > 1 &&
4054 	    adapter->intr.type == VMXNET3_IT_MSIX) {
4055 		adapter->rss = true;
4056 		netdev->hw_features |= NETIF_F_RXHASH;
4057 		netdev->features |= NETIF_F_RXHASH;
4058 		dev_dbg(&pdev->dev, "RSS is enabled.\n");
4059 	} else {
4060 		adapter->rss = false;
4061 	}
4062 #endif
4063 
4064 	vmxnet3_read_mac_addr(adapter, mac);
4065 	dev_addr_set(netdev, mac);
4066 
4067 	netdev->netdev_ops = &vmxnet3_netdev_ops;
4068 	vmxnet3_set_ethtool_ops(netdev);
4069 	netdev->watchdog_timeo = 5 * HZ;
4070 
4071 	/* MTU range: 60 - 9190 */
4072 	netdev->min_mtu = VMXNET3_MIN_MTU;
4073 	if (VMXNET3_VERSION_GE_6(adapter))
4074 		netdev->max_mtu = VMXNET3_V6_MAX_MTU;
4075 	else
4076 		netdev->max_mtu = VMXNET3_MAX_MTU;
4077 
4078 	INIT_WORK(&adapter->work, vmxnet3_reset_work);
4079 	set_bit(VMXNET3_STATE_BIT_QUIESCED, &adapter->state);
4080 
4081 	if (adapter->intr.type == VMXNET3_IT_MSIX) {
4082 		int i;
4083 		for (i = 0; i < adapter->num_rx_queues; i++) {
4084 			netif_napi_add(adapter->netdev,
4085 				       &adapter->rx_queue[i].napi,
4086 				       vmxnet3_poll_rx_only);
4087 		}
4088 	} else {
4089 		netif_napi_add(adapter->netdev, &adapter->rx_queue[0].napi,
4090 			       vmxnet3_poll);
4091 	}
4092 
4093 	netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4094 	netif_set_real_num_rx_queues(adapter->netdev, adapter->num_rx_queues);
4095 
4096 	netif_carrier_off(netdev);
4097 	err = register_netdev(netdev);
4098 
4099 	if (err) {
4100 		dev_err(&pdev->dev, "Failed to register adapter\n");
4101 		goto err_register;
4102 	}
4103 
4104 	vmxnet3_check_link(adapter, false);
4105 	return 0;
4106 
4107 err_register:
4108 	if (VMXNET3_VERSION_GE_3(adapter)) {
4109 		dma_free_coherent(&adapter->pdev->dev,
4110 				  sizeof(struct Vmxnet3_CoalesceScheme),
4111 				  adapter->coal_conf, adapter->coal_conf_pa);
4112 	}
4113 	vmxnet3_free_intr_resources(adapter);
4114 err_coal_conf:
4115 #ifdef VMXNET3_RSS
4116 	dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
4117 			  adapter->rss_conf, adapter->rss_conf_pa);
4118 err_alloc_rss:
4119 #endif
4120 	dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
4121 			  adapter->pm_conf, adapter->pm_conf_pa);
4122 err_alloc_pm:
4123 	dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
4124 			  adapter->queue_desc_pa);
4125 err_ver:
4126 	vmxnet3_free_pci_resources(adapter);
4127 err_alloc_pci:
4128 	dma_free_coherent(&adapter->pdev->dev,
4129 			  sizeof(struct Vmxnet3_DriverShared),
4130 			  adapter->shared, adapter->shared_pa);
4131 err_alloc_shared:
4132 	dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
4133 			 sizeof(struct vmxnet3_adapter), DMA_TO_DEVICE);
4134 err_set_mask:
4135 	free_netdev(netdev);
4136 	return err;
4137 }
4138 
4139 
4140 static void
vmxnet3_remove_device(struct pci_dev * pdev)4141 vmxnet3_remove_device(struct pci_dev *pdev)
4142 {
4143 	struct net_device *netdev = pci_get_drvdata(pdev);
4144 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
4145 	int size = 0;
4146 	int num_rx_queues, rx_queues;
4147 	unsigned long flags;
4148 
4149 #ifdef VMXNET3_RSS
4150 	if (enable_mq)
4151 		num_rx_queues = min(VMXNET3_DEVICE_MAX_RX_QUEUES,
4152 				    (int)num_online_cpus());
4153 	else
4154 #endif
4155 		num_rx_queues = 1;
4156 	if (!VMXNET3_VERSION_GE_6(adapter)) {
4157 		num_rx_queues = rounddown_pow_of_two(num_rx_queues);
4158 	}
4159 	if (VMXNET3_VERSION_GE_6(adapter)) {
4160 		spin_lock_irqsave(&adapter->cmd_lock, flags);
4161 		VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
4162 				       VMXNET3_CMD_GET_MAX_QUEUES_CONF);
4163 		rx_queues = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_CMD);
4164 		spin_unlock_irqrestore(&adapter->cmd_lock, flags);
4165 		if (rx_queues > 0)
4166 			rx_queues = (rx_queues >> 8) & 0xff;
4167 		else
4168 			rx_queues = min(num_rx_queues, VMXNET3_DEVICE_DEFAULT_RX_QUEUES);
4169 		num_rx_queues = min(num_rx_queues, rx_queues);
4170 	} else {
4171 		num_rx_queues = min(num_rx_queues,
4172 				    VMXNET3_DEVICE_DEFAULT_RX_QUEUES);
4173 	}
4174 
4175 	cancel_work_sync(&adapter->work);
4176 
4177 	unregister_netdev(netdev);
4178 
4179 	vmxnet3_free_intr_resources(adapter);
4180 	vmxnet3_free_pci_resources(adapter);
4181 	if (VMXNET3_VERSION_GE_3(adapter)) {
4182 		dma_free_coherent(&adapter->pdev->dev,
4183 				  sizeof(struct Vmxnet3_CoalesceScheme),
4184 				  adapter->coal_conf, adapter->coal_conf_pa);
4185 	}
4186 #ifdef VMXNET3_RSS
4187 	dma_free_coherent(&adapter->pdev->dev, sizeof(struct UPT1_RSSConf),
4188 			  adapter->rss_conf, adapter->rss_conf_pa);
4189 #endif
4190 	dma_free_coherent(&adapter->pdev->dev, sizeof(struct Vmxnet3_PMConf),
4191 			  adapter->pm_conf, adapter->pm_conf_pa);
4192 
4193 	size = sizeof(struct Vmxnet3_TxQueueDesc) * adapter->num_tx_queues;
4194 	size += sizeof(struct Vmxnet3_RxQueueDesc) * num_rx_queues;
4195 	dma_free_coherent(&adapter->pdev->dev, size, adapter->tqd_start,
4196 			  adapter->queue_desc_pa);
4197 	dma_free_coherent(&adapter->pdev->dev,
4198 			  sizeof(struct Vmxnet3_DriverShared),
4199 			  adapter->shared, adapter->shared_pa);
4200 	dma_unmap_single(&adapter->pdev->dev, adapter->adapter_pa,
4201 			 sizeof(struct vmxnet3_adapter), DMA_TO_DEVICE);
4202 	free_netdev(netdev);
4203 }
4204 
vmxnet3_shutdown_device(struct pci_dev * pdev)4205 static void vmxnet3_shutdown_device(struct pci_dev *pdev)
4206 {
4207 	struct net_device *netdev = pci_get_drvdata(pdev);
4208 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
4209 	unsigned long flags;
4210 
4211 	/* Reset_work may be in the middle of resetting the device, wait for its
4212 	 * completion.
4213 	 */
4214 	while (test_and_set_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state))
4215 		usleep_range(1000, 2000);
4216 
4217 	if (test_and_set_bit(VMXNET3_STATE_BIT_QUIESCED,
4218 			     &adapter->state)) {
4219 		clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
4220 		return;
4221 	}
4222 	spin_lock_irqsave(&adapter->cmd_lock, flags);
4223 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
4224 			       VMXNET3_CMD_QUIESCE_DEV);
4225 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
4226 	vmxnet3_disable_all_intrs(adapter);
4227 
4228 	clear_bit(VMXNET3_STATE_BIT_RESETTING, &adapter->state);
4229 }
4230 
4231 
4232 #ifdef CONFIG_PM
4233 
4234 static int
vmxnet3_suspend(struct device * device)4235 vmxnet3_suspend(struct device *device)
4236 {
4237 	struct pci_dev *pdev = to_pci_dev(device);
4238 	struct net_device *netdev = pci_get_drvdata(pdev);
4239 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
4240 	struct Vmxnet3_PMConf *pmConf;
4241 	struct ethhdr *ehdr;
4242 	struct arphdr *ahdr;
4243 	u8 *arpreq;
4244 	struct in_device *in_dev;
4245 	struct in_ifaddr *ifa;
4246 	unsigned long flags;
4247 	int i = 0;
4248 
4249 	if (!netif_running(netdev))
4250 		return 0;
4251 
4252 	for (i = 0; i < adapter->num_rx_queues; i++)
4253 		napi_disable(&adapter->rx_queue[i].napi);
4254 
4255 	vmxnet3_disable_all_intrs(adapter);
4256 	vmxnet3_free_irqs(adapter);
4257 	vmxnet3_free_intr_resources(adapter);
4258 
4259 	netif_device_detach(netdev);
4260 
4261 	/* Create wake-up filters. */
4262 	pmConf = adapter->pm_conf;
4263 	memset(pmConf, 0, sizeof(*pmConf));
4264 
4265 	if (adapter->wol & WAKE_UCAST) {
4266 		pmConf->filters[i].patternSize = ETH_ALEN;
4267 		pmConf->filters[i].maskSize = 1;
4268 		memcpy(pmConf->filters[i].pattern, netdev->dev_addr, ETH_ALEN);
4269 		pmConf->filters[i].mask[0] = 0x3F; /* LSB ETH_ALEN bits */
4270 
4271 		pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
4272 		i++;
4273 	}
4274 
4275 	if (adapter->wol & WAKE_ARP) {
4276 		rcu_read_lock();
4277 
4278 		in_dev = __in_dev_get_rcu(netdev);
4279 		if (!in_dev) {
4280 			rcu_read_unlock();
4281 			goto skip_arp;
4282 		}
4283 
4284 		ifa = rcu_dereference(in_dev->ifa_list);
4285 		if (!ifa) {
4286 			rcu_read_unlock();
4287 			goto skip_arp;
4288 		}
4289 
4290 		pmConf->filters[i].patternSize = ETH_HLEN + /* Ethernet header*/
4291 			sizeof(struct arphdr) +		/* ARP header */
4292 			2 * ETH_ALEN +		/* 2 Ethernet addresses*/
4293 			2 * sizeof(u32);	/*2 IPv4 addresses */
4294 		pmConf->filters[i].maskSize =
4295 			(pmConf->filters[i].patternSize - 1) / 8 + 1;
4296 
4297 		/* ETH_P_ARP in Ethernet header. */
4298 		ehdr = (struct ethhdr *)pmConf->filters[i].pattern;
4299 		ehdr->h_proto = htons(ETH_P_ARP);
4300 
4301 		/* ARPOP_REQUEST in ARP header. */
4302 		ahdr = (struct arphdr *)&pmConf->filters[i].pattern[ETH_HLEN];
4303 		ahdr->ar_op = htons(ARPOP_REQUEST);
4304 		arpreq = (u8 *)(ahdr + 1);
4305 
4306 		/* The Unicast IPv4 address in 'tip' field. */
4307 		arpreq += 2 * ETH_ALEN + sizeof(u32);
4308 		*(__be32 *)arpreq = ifa->ifa_address;
4309 
4310 		rcu_read_unlock();
4311 
4312 		/* The mask for the relevant bits. */
4313 		pmConf->filters[i].mask[0] = 0x00;
4314 		pmConf->filters[i].mask[1] = 0x30; /* ETH_P_ARP */
4315 		pmConf->filters[i].mask[2] = 0x30; /* ARPOP_REQUEST */
4316 		pmConf->filters[i].mask[3] = 0x00;
4317 		pmConf->filters[i].mask[4] = 0xC0; /* IPv4 TIP */
4318 		pmConf->filters[i].mask[5] = 0x03; /* IPv4 TIP */
4319 
4320 		pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_FILTER;
4321 		i++;
4322 	}
4323 
4324 skip_arp:
4325 	if (adapter->wol & WAKE_MAGIC)
4326 		pmConf->wakeUpEvents |= VMXNET3_PM_WAKEUP_MAGIC;
4327 
4328 	pmConf->numFilters = i;
4329 
4330 	adapter->shared->devRead.pmConfDesc.confVer = cpu_to_le32(1);
4331 	adapter->shared->devRead.pmConfDesc.confLen = cpu_to_le32(sizeof(
4332 								  *pmConf));
4333 	adapter->shared->devRead.pmConfDesc.confPA =
4334 		cpu_to_le64(adapter->pm_conf_pa);
4335 
4336 	spin_lock_irqsave(&adapter->cmd_lock, flags);
4337 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
4338 			       VMXNET3_CMD_UPDATE_PMCFG);
4339 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
4340 
4341 	pci_save_state(pdev);
4342 	pci_enable_wake(pdev, pci_choose_state(pdev, PMSG_SUSPEND),
4343 			adapter->wol);
4344 	pci_disable_device(pdev);
4345 	pci_set_power_state(pdev, pci_choose_state(pdev, PMSG_SUSPEND));
4346 
4347 	return 0;
4348 }
4349 
4350 
4351 static int
vmxnet3_resume(struct device * device)4352 vmxnet3_resume(struct device *device)
4353 {
4354 	int err;
4355 	unsigned long flags;
4356 	struct pci_dev *pdev = to_pci_dev(device);
4357 	struct net_device *netdev = pci_get_drvdata(pdev);
4358 	struct vmxnet3_adapter *adapter = netdev_priv(netdev);
4359 
4360 	if (!netif_running(netdev))
4361 		return 0;
4362 
4363 	pci_set_power_state(pdev, PCI_D0);
4364 	pci_restore_state(pdev);
4365 	err = pci_enable_device_mem(pdev);
4366 	if (err != 0)
4367 		return err;
4368 
4369 	pci_enable_wake(pdev, PCI_D0, 0);
4370 
4371 	vmxnet3_alloc_intr_resources(adapter);
4372 
4373 	/* During hibernate and suspend, device has to be reinitialized as the
4374 	 * device state need not be preserved.
4375 	 */
4376 
4377 	/* Need not check adapter state as other reset tasks cannot run during
4378 	 * device resume.
4379 	 */
4380 	spin_lock_irqsave(&adapter->cmd_lock, flags);
4381 	VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD,
4382 			       VMXNET3_CMD_QUIESCE_DEV);
4383 	spin_unlock_irqrestore(&adapter->cmd_lock, flags);
4384 	vmxnet3_tq_cleanup_all(adapter);
4385 	vmxnet3_rq_cleanup_all(adapter);
4386 
4387 	vmxnet3_reset_dev(adapter);
4388 	err = vmxnet3_activate_dev(adapter);
4389 	if (err != 0) {
4390 		netdev_err(netdev,
4391 			   "failed to re-activate on resume, error: %d", err);
4392 		vmxnet3_force_close(adapter);
4393 		return err;
4394 	}
4395 	netif_device_attach(netdev);
4396 
4397 	return 0;
4398 }
4399 
4400 static const struct dev_pm_ops vmxnet3_pm_ops = {
4401 	.suspend = vmxnet3_suspend,
4402 	.resume = vmxnet3_resume,
4403 	.freeze = vmxnet3_suspend,
4404 	.restore = vmxnet3_resume,
4405 };
4406 #endif
4407 
4408 static struct pci_driver vmxnet3_driver = {
4409 	.name		= vmxnet3_driver_name,
4410 	.id_table	= vmxnet3_pciid_table,
4411 	.probe		= vmxnet3_probe_device,
4412 	.remove		= vmxnet3_remove_device,
4413 	.shutdown	= vmxnet3_shutdown_device,
4414 #ifdef CONFIG_PM
4415 	.driver.pm	= &vmxnet3_pm_ops,
4416 #endif
4417 };
4418 
4419 
4420 static int __init
vmxnet3_init_module(void)4421 vmxnet3_init_module(void)
4422 {
4423 	pr_info("%s - version %s\n", VMXNET3_DRIVER_DESC,
4424 		VMXNET3_DRIVER_VERSION_REPORT);
4425 	return pci_register_driver(&vmxnet3_driver);
4426 }
4427 
4428 module_init(vmxnet3_init_module);
4429 
4430 
4431 static void
vmxnet3_exit_module(void)4432 vmxnet3_exit_module(void)
4433 {
4434 	pci_unregister_driver(&vmxnet3_driver);
4435 }
4436 
4437 module_exit(vmxnet3_exit_module);
4438 
4439 MODULE_AUTHOR("VMware, Inc.");
4440 MODULE_DESCRIPTION(VMXNET3_DRIVER_DESC);
4441 MODULE_LICENSE("GPL v2");
4442 MODULE_VERSION(VMXNET3_DRIVER_VERSION_STRING);
4443