1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PS3 gelic network driver.
4 *
5 * Copyright (C) 2007 Sony Computer Entertainment Inc.
6 * Copyright 2006, 2007 Sony Corporation
7 *
8 * This file is based on: spider_net.c
9 *
10 * (C) Copyright IBM Corp. 2005
11 *
12 * Authors : Utz Bacher <utz.bacher@de.ibm.com>
13 * Jens Osterkamp <Jens.Osterkamp@de.ibm.com>
14 */
15
16 #undef DEBUG
17
18 #include <linux/interrupt.h>
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/slab.h>
22
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/if_vlan.h>
26
27 #include <linux/in.h>
28 #include <linux/ip.h>
29 #include <linux/tcp.h>
30
31 #include <linux/dma-mapping.h>
32 #include <net/checksum.h>
33 #include <asm/firmware.h>
34 #include <asm/ps3.h>
35 #include <asm/lv1call.h>
36
37 #include "ps3_gelic_net.h"
38 #include "ps3_gelic_wireless.h"
39
40 #define DRV_NAME "Gelic Network Driver"
41 #define DRV_VERSION "2.0"
42
43 MODULE_AUTHOR("SCE Inc.");
44 MODULE_DESCRIPTION("Gelic Network driver");
45 MODULE_LICENSE("GPL");
46
47
48 /* set irq_mask */
gelic_card_set_irq_mask(struct gelic_card * card,u64 mask)49 int gelic_card_set_irq_mask(struct gelic_card *card, u64 mask)
50 {
51 int status;
52
53 status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card),
54 mask, 0);
55 if (status)
56 dev_info(ctodev(card),
57 "%s failed %d\n", __func__, status);
58 return status;
59 }
60
gelic_card_rx_irq_on(struct gelic_card * card)61 static void gelic_card_rx_irq_on(struct gelic_card *card)
62 {
63 card->irq_mask |= GELIC_CARD_RXINT;
64 gelic_card_set_irq_mask(card, card->irq_mask);
65 }
gelic_card_rx_irq_off(struct gelic_card * card)66 static void gelic_card_rx_irq_off(struct gelic_card *card)
67 {
68 card->irq_mask &= ~GELIC_CARD_RXINT;
69 gelic_card_set_irq_mask(card, card->irq_mask);
70 }
71
gelic_card_get_ether_port_status(struct gelic_card * card,int inform)72 static void gelic_card_get_ether_port_status(struct gelic_card *card,
73 int inform)
74 {
75 u64 v2;
76 struct net_device *ether_netdev;
77
78 lv1_net_control(bus_id(card), dev_id(card),
79 GELIC_LV1_GET_ETH_PORT_STATUS,
80 GELIC_LV1_VLAN_TX_ETHERNET_0, 0, 0,
81 &card->ether_port_status, &v2);
82
83 if (inform) {
84 ether_netdev = card->netdev[GELIC_PORT_ETHERNET_0];
85 if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
86 netif_carrier_on(ether_netdev);
87 else
88 netif_carrier_off(ether_netdev);
89 }
90 }
91
92 /**
93 * gelic_descr_get_status -- returns the status of a descriptor
94 * @descr: descriptor to look at
95 *
96 * returns the status as in the hw_regs.dmac_cmd_status field of the descriptor
97 */
98 static enum gelic_descr_dma_status
gelic_descr_get_status(struct gelic_descr * descr)99 gelic_descr_get_status(struct gelic_descr *descr)
100 {
101 return be32_to_cpu(descr->hw_regs.dmac_cmd_status) &
102 GELIC_DESCR_DMA_STAT_MASK;
103 }
104
gelic_card_set_link_mode(struct gelic_card * card,int mode)105 static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
106 {
107 int status;
108 u64 v1, v2;
109
110 status = lv1_net_control(bus_id(card), dev_id(card),
111 GELIC_LV1_SET_NEGOTIATION_MODE,
112 GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
113 if (status) {
114 pr_info("%s: failed setting negotiation mode %d\n", __func__,
115 status);
116 return -EBUSY;
117 }
118
119 card->link_mode = mode;
120 return 0;
121 }
122
123 /**
124 * gelic_card_disable_txdmac - disables the transmit DMA controller
125 * @card: card structure
126 *
127 * gelic_card_disable_txdmac terminates processing on the DMA controller by
128 * turing off DMA and issuing a force end
129 */
gelic_card_disable_txdmac(struct gelic_card * card)130 static void gelic_card_disable_txdmac(struct gelic_card *card)
131 {
132 int status;
133
134 /* this hvc blocks until the DMA in progress really stopped */
135 status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card));
136 if (status)
137 dev_err(ctodev(card),
138 "lv1_net_stop_tx_dma failed, status=%d\n", status);
139 }
140
141 /**
142 * gelic_card_enable_rxdmac - enables the receive DMA controller
143 * @card: card structure
144 *
145 * gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
146 * in the GDADMACCNTR register
147 */
gelic_card_enable_rxdmac(struct gelic_card * card)148 static void gelic_card_enable_rxdmac(struct gelic_card *card)
149 {
150 int status;
151
152 #ifdef DEBUG
153 if (gelic_descr_get_status(card->rx_chain.head) !=
154 GELIC_DESCR_DMA_CARDOWNED) {
155 printk(KERN_ERR "%s: status=%x\n", __func__,
156 be32_to_cpu(card->rx_chain.head->hw_regs.dmac_cmd_status));
157 printk(KERN_ERR "%s: nextphy=%x\n", __func__,
158 be32_to_cpu(card->rx_chain.head->hw_regs.next_descr_addr));
159 printk(KERN_ERR "%s: head=%p\n", __func__,
160 card->rx_chain.head);
161 }
162 #endif
163 status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
164 card->rx_chain.head->link.cpu_addr, 0);
165 if (status)
166 dev_info(ctodev(card),
167 "lv1_net_start_rx_dma failed, status=%d\n", status);
168 }
169
170 /**
171 * gelic_card_disable_rxdmac - disables the receive DMA controller
172 * @card: card structure
173 *
174 * gelic_card_disable_rxdmac terminates processing on the DMA controller by
175 * turing off DMA and issuing a force end
176 */
gelic_card_disable_rxdmac(struct gelic_card * card)177 static void gelic_card_disable_rxdmac(struct gelic_card *card)
178 {
179 int status;
180
181 /* this hvc blocks until the DMA in progress really stopped */
182 status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card));
183 if (status)
184 dev_err(ctodev(card),
185 "lv1_net_stop_rx_dma failed, %d\n", status);
186 }
187
188 /**
189 * gelic_descr_set_status -- sets the status of a descriptor
190 * @descr: descriptor to change
191 * @status: status to set in the descriptor
192 *
193 * changes the status to the specified value. Doesn't change other bits
194 * in the status
195 */
gelic_descr_set_status(struct gelic_descr * descr,enum gelic_descr_dma_status status)196 static void gelic_descr_set_status(struct gelic_descr *descr,
197 enum gelic_descr_dma_status status)
198 {
199 descr->hw_regs.dmac_cmd_status = cpu_to_be32(status |
200 (be32_to_cpu(descr->hw_regs.dmac_cmd_status) &
201 ~GELIC_DESCR_DMA_STAT_MASK));
202 /*
203 * dma_cmd_status field is used to indicate whether the descriptor
204 * is valid or not.
205 * Usually caller of this function wants to inform that to the
206 * hardware, so we assure here the hardware sees the change.
207 */
208 wmb();
209 }
210
211 /**
212 * gelic_card_reset_chain - reset status of a descriptor chain
213 * @card: card structure
214 * @chain: address of chain
215 * @start_descr: address of descriptor array
216 *
217 * Reset the status of dma descriptors to ready state
218 * and re-initialize the hardware chain for later use
219 */
gelic_card_reset_chain(struct gelic_card * card,struct gelic_descr_chain * chain,struct gelic_descr * start_descr)220 static void gelic_card_reset_chain(struct gelic_card *card,
221 struct gelic_descr_chain *chain,
222 struct gelic_descr *start_descr)
223 {
224 struct gelic_descr *descr;
225
226 for (descr = start_descr; start_descr != descr->next; descr++) {
227 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
228 descr->hw_regs.next_descr_addr
229 = cpu_to_be32(descr->next->link.cpu_addr);
230 }
231
232 chain->head = start_descr;
233 chain->tail = (descr - 1);
234
235 (descr - 1)->hw_regs.next_descr_addr = 0;
236 }
237
gelic_card_up(struct gelic_card * card)238 void gelic_card_up(struct gelic_card *card)
239 {
240 pr_debug("%s: called\n", __func__);
241 mutex_lock(&card->updown_lock);
242 if (atomic_inc_return(&card->users) == 1) {
243 pr_debug("%s: real do\n", __func__);
244 /* enable irq */
245 gelic_card_set_irq_mask(card, card->irq_mask);
246 /* start rx */
247 gelic_card_enable_rxdmac(card);
248
249 napi_enable(&card->napi);
250 }
251 mutex_unlock(&card->updown_lock);
252 pr_debug("%s: done\n", __func__);
253 }
254
gelic_card_down(struct gelic_card * card)255 void gelic_card_down(struct gelic_card *card)
256 {
257 u64 mask;
258 pr_debug("%s: called\n", __func__);
259 mutex_lock(&card->updown_lock);
260 if (atomic_dec_if_positive(&card->users) == 0) {
261 pr_debug("%s: real do\n", __func__);
262 napi_disable(&card->napi);
263 /*
264 * Disable irq. Wireless interrupts will
265 * be disabled later if any
266 */
267 mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
268 GELIC_CARD_WLAN_COMMAND_COMPLETED);
269 gelic_card_set_irq_mask(card, mask);
270 /* stop rx */
271 gelic_card_disable_rxdmac(card);
272 gelic_card_reset_chain(card, &card->rx_chain,
273 card->descr + GELIC_NET_TX_DESCRIPTORS);
274 /* stop tx */
275 gelic_card_disable_txdmac(card);
276 }
277 mutex_unlock(&card->updown_lock);
278 pr_debug("%s: done\n", __func__);
279 }
280
281 /**
282 * gelic_card_free_chain - free descriptor chain
283 * @card: card structure
284 * @descr_in: address of desc
285 */
gelic_card_free_chain(struct gelic_card * card,struct gelic_descr * descr_in)286 static void gelic_card_free_chain(struct gelic_card *card,
287 struct gelic_descr *descr_in)
288 {
289 struct gelic_descr *descr;
290
291 for (descr = descr_in; descr && descr->link.cpu_addr;
292 descr = descr->next) {
293 dma_unmap_single(ctodev(card), descr->link.cpu_addr,
294 descr->link.size, DMA_BIDIRECTIONAL);
295 descr->link.cpu_addr = 0;
296 descr->link.size = 0;
297 }
298 }
299
300 /**
301 * gelic_card_init_chain - links descriptor chain
302 * @card: card structure
303 * @chain: address of chain
304 * @start_descr: address of descriptor array
305 * @no: number of descriptors
306 *
307 * we manage a circular list that mirrors the hardware structure,
308 * except that the hardware uses bus addresses.
309 *
310 * returns 0 on success, <0 on failure
311 */
gelic_card_init_chain(struct gelic_card * card,struct gelic_descr_chain * chain,struct gelic_descr * start_descr,int no)312 static int gelic_card_init_chain(struct gelic_card *card,
313 struct gelic_descr_chain *chain,
314 struct gelic_descr *start_descr, int no)
315 {
316 int i;
317 struct gelic_descr *descr;
318
319 descr = start_descr;
320 memset(descr, 0, sizeof(*descr) * no);
321
322 /* set up the hardware pointers in each descriptor */
323 for (i = 0; i < no; i++, descr++) {
324 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
325
326 descr->link.size = sizeof(struct gelic_hw_regs);
327 descr->link.cpu_addr = dma_map_single(ctodev(card), descr,
328 descr->link.size, DMA_BIDIRECTIONAL);
329
330 if (dma_mapping_error(ctodev(card), descr->link.cpu_addr)) {
331 for (i--, descr--; 0 <= i; i--, descr--) {
332 dma_unmap_single(ctodev(card),
333 descr->link.cpu_addr, descr->link.size,
334 DMA_BIDIRECTIONAL);
335 }
336 return -ENOMEM;
337 }
338
339 descr->next = descr + 1;
340 descr->prev = descr - 1;
341 }
342 /* make them as ring */
343 (descr - 1)->next = start_descr;
344 start_descr->prev = (descr - 1);
345
346 /* chain bus addr of hw descriptor */
347 descr = start_descr;
348 for (i = 0; i < no; i++, descr++) {
349 descr->hw_regs.next_descr_addr =
350 cpu_to_be32(descr->next->link.cpu_addr);
351 }
352
353 chain->head = start_descr;
354 chain->tail = start_descr;
355
356 /* do not chain last hw descriptor */
357 (descr - 1)->hw_regs.next_descr_addr = 0;
358
359 return 0;
360 }
361
362 /**
363 * gelic_descr_prepare_rx - reinitializes a rx descriptor
364 * @card: card structure
365 * @descr: descriptor to re-init
366 *
367 * return 0 on success, <0 on failure
368 *
369 * allocates a new rx skb, iommu-maps it and attaches it to the descriptor.
370 * Activate the descriptor state-wise
371 *
372 * Gelic RX sk_buffs must be aligned to GELIC_NET_RXBUF_ALIGN and the length
373 * must be a multiple of GELIC_NET_RXBUF_ALIGN.
374 */
gelic_descr_prepare_rx(struct gelic_card * card,struct gelic_descr * descr)375 static int gelic_descr_prepare_rx(struct gelic_card *card,
376 struct gelic_descr *descr)
377 {
378 static const unsigned int rx_skb_size =
379 ALIGN(GELIC_NET_MAX_FRAME, GELIC_NET_RXBUF_ALIGN) +
380 GELIC_NET_RXBUF_ALIGN - 1;
381 dma_addr_t cpu_addr;
382 int offset;
383
384 if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_NOT_IN_USE)
385 dev_info(ctodev(card), "%s: ERROR status\n", __func__);
386
387 descr->hw_regs.dmac_cmd_status = 0;
388 descr->hw_regs.result_size = 0;
389 descr->hw_regs.valid_size = 0;
390 descr->hw_regs.data_error = 0;
391 descr->hw_regs.payload.dev_addr = 0;
392 descr->hw_regs.payload.size = 0;
393
394 descr->skb = netdev_alloc_skb(*card->netdev, rx_skb_size);
395 if (!descr->skb) {
396 descr->hw_regs.payload.dev_addr = 0; /* tell DMAC don't touch memory */
397 return -ENOMEM;
398 }
399
400 offset = ((unsigned long)descr->skb->data) &
401 (GELIC_NET_RXBUF_ALIGN - 1);
402 if (offset)
403 skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset);
404 /* io-mmu-map the skb */
405 cpu_addr = dma_map_single(ctodev(card), descr->skb->data,
406 GELIC_NET_MAX_FRAME, DMA_FROM_DEVICE);
407 descr->hw_regs.payload.dev_addr = cpu_to_be32(cpu_addr);
408 if (dma_mapping_error(ctodev(card), cpu_addr)) {
409 dev_kfree_skb_any(descr->skb);
410 descr->skb = NULL;
411 dev_info(ctodev(card),
412 "%s:Could not iommu-map rx buffer\n", __func__);
413 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
414 return -ENOMEM;
415 }
416
417 descr->hw_regs.payload.size = cpu_to_be32(GELIC_NET_MAX_FRAME);
418 descr->hw_regs.payload.dev_addr = cpu_to_be32(cpu_addr);
419
420 gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
421
422 return 0;
423 }
424
425 /**
426 * gelic_card_release_rx_chain - free all skb of rx descr
427 * @card: card structure
428 *
429 */
gelic_card_release_rx_chain(struct gelic_card * card)430 static void gelic_card_release_rx_chain(struct gelic_card *card)
431 {
432 struct gelic_descr *descr = card->rx_chain.head;
433
434 do {
435 if (descr->skb) {
436 dma_unmap_single(ctodev(card),
437 be32_to_cpu(descr->hw_regs.payload.dev_addr),
438 descr->skb->len,
439 DMA_FROM_DEVICE);
440 descr->hw_regs.payload.dev_addr = 0;
441 descr->hw_regs.payload.size = 0;
442 dev_kfree_skb_any(descr->skb);
443 descr->skb = NULL;
444 gelic_descr_set_status(descr,
445 GELIC_DESCR_DMA_NOT_IN_USE);
446 }
447 descr = descr->next;
448 } while (descr != card->rx_chain.head);
449 }
450
451 /**
452 * gelic_card_fill_rx_chain - fills descriptors/skbs in the rx chains
453 * @card: card structure
454 *
455 * fills all descriptors in the rx chain: allocates skbs
456 * and iommu-maps them.
457 * returns 0 on success, < 0 on failure
458 */
gelic_card_fill_rx_chain(struct gelic_card * card)459 static int gelic_card_fill_rx_chain(struct gelic_card *card)
460 {
461 struct gelic_descr *descr = card->rx_chain.head;
462 int ret;
463
464 do {
465 if (!descr->skb) {
466 ret = gelic_descr_prepare_rx(card, descr);
467 if (ret)
468 goto rewind;
469 }
470 descr = descr->next;
471 } while (descr != card->rx_chain.head);
472
473 return 0;
474 rewind:
475 gelic_card_release_rx_chain(card);
476 return ret;
477 }
478
479 /**
480 * gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
481 * @card: card structure
482 *
483 * returns 0 on success, < 0 on failure
484 */
gelic_card_alloc_rx_skbs(struct gelic_card * card)485 static int gelic_card_alloc_rx_skbs(struct gelic_card *card)
486 {
487 struct gelic_descr_chain *chain;
488 int ret;
489 chain = &card->rx_chain;
490 ret = gelic_card_fill_rx_chain(card);
491 chain->tail = card->rx_top->prev; /* point to the last */
492 return ret;
493 }
494
495 /**
496 * gelic_descr_release_tx - processes a used tx descriptor
497 * @card: card structure
498 * @descr: descriptor to release
499 *
500 * releases a used tx descriptor (unmapping, freeing of skb)
501 */
gelic_descr_release_tx(struct gelic_card * card,struct gelic_descr * descr)502 static void gelic_descr_release_tx(struct gelic_card *card,
503 struct gelic_descr *descr)
504 {
505 struct sk_buff *skb = descr->skb;
506
507 BUG_ON(!(be32_to_cpu(descr->hw_regs.data_status) & GELIC_DESCR_TX_TAIL));
508
509 dma_unmap_single(ctodev(card),
510 be32_to_cpu(descr->hw_regs.payload.dev_addr), skb->len,
511 DMA_TO_DEVICE);
512 dev_kfree_skb_any(skb);
513
514 descr->hw_regs.payload.dev_addr = 0;
515 descr->hw_regs.payload.size = 0;
516 descr->hw_regs.next_descr_addr = 0;
517 descr->hw_regs.result_size = 0;
518 descr->hw_regs.valid_size = 0;
519 descr->hw_regs.data_status = 0;
520 descr->hw_regs.data_error = 0;
521 descr->skb = NULL;
522
523 /* set descr status */
524 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
525 }
526
gelic_card_stop_queues(struct gelic_card * card)527 static void gelic_card_stop_queues(struct gelic_card *card)
528 {
529 netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
530
531 if (card->netdev[GELIC_PORT_WIRELESS])
532 netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
533 }
gelic_card_wake_queues(struct gelic_card * card)534 static void gelic_card_wake_queues(struct gelic_card *card)
535 {
536 netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
537
538 if (card->netdev[GELIC_PORT_WIRELESS])
539 netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
540 }
541 /**
542 * gelic_card_release_tx_chain - processes sent tx descriptors
543 * @card: adapter structure
544 * @stop: net_stop sequence
545 *
546 * releases the tx descriptors that gelic has finished with
547 */
gelic_card_release_tx_chain(struct gelic_card * card,int stop)548 static void gelic_card_release_tx_chain(struct gelic_card *card, int stop)
549 {
550 struct gelic_descr_chain *tx_chain;
551 enum gelic_descr_dma_status status;
552 struct net_device *netdev;
553 int release = 0;
554
555 for (tx_chain = &card->tx_chain;
556 tx_chain->head != tx_chain->tail && tx_chain->tail;
557 tx_chain->tail = tx_chain->tail->next) {
558 status = gelic_descr_get_status(tx_chain->tail);
559 netdev = tx_chain->tail->skb->dev;
560 switch (status) {
561 case GELIC_DESCR_DMA_RESPONSE_ERROR:
562 case GELIC_DESCR_DMA_PROTECTION_ERROR:
563 case GELIC_DESCR_DMA_FORCE_END:
564 if (printk_ratelimit())
565 dev_info(ctodev(card),
566 "%s: forcing end of tx descriptor " \
567 "with status %x\n",
568 __func__, status);
569 netdev->stats.tx_dropped++;
570 break;
571
572 case GELIC_DESCR_DMA_COMPLETE:
573 if (tx_chain->tail->skb) {
574 netdev->stats.tx_packets++;
575 netdev->stats.tx_bytes +=
576 tx_chain->tail->skb->len;
577 }
578 break;
579
580 case GELIC_DESCR_DMA_CARDOWNED:
581 /* pending tx request */
582 default:
583 /* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
584 if (!stop)
585 goto out;
586 }
587 gelic_descr_release_tx(card, tx_chain->tail);
588 release ++;
589 }
590 out:
591 if (!stop && release)
592 gelic_card_wake_queues(card);
593 }
594
595 /**
596 * gelic_net_set_multi - sets multicast addresses and promisc flags
597 * @netdev: interface device structure
598 *
599 * gelic_net_set_multi configures multicast addresses as needed for the
600 * netdev interface. It also sets up multicast, allmulti and promisc
601 * flags appropriately
602 */
gelic_net_set_multi(struct net_device * netdev)603 void gelic_net_set_multi(struct net_device *netdev)
604 {
605 struct gelic_card *card = netdev_card(netdev);
606 struct netdev_hw_addr *ha;
607 unsigned int i;
608 uint8_t *p;
609 u64 addr;
610 int status;
611
612 /* clear all multicast address */
613 status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card),
614 0, 1);
615 if (status)
616 dev_err(ctodev(card),
617 "lv1_net_remove_multicast_address failed %d\n",
618 status);
619 /* set broadcast address */
620 status = lv1_net_add_multicast_address(bus_id(card), dev_id(card),
621 GELIC_NET_BROADCAST_ADDR, 0);
622 if (status)
623 dev_err(ctodev(card),
624 "lv1_net_add_multicast_address failed, %d\n",
625 status);
626
627 if ((netdev->flags & IFF_ALLMULTI) ||
628 (netdev_mc_count(netdev) > GELIC_NET_MC_COUNT_MAX)) {
629 status = lv1_net_add_multicast_address(bus_id(card),
630 dev_id(card),
631 0, 1);
632 if (status)
633 dev_err(ctodev(card),
634 "lv1_net_add_multicast_address failed, %d\n",
635 status);
636 return;
637 }
638
639 /* set multicast addresses */
640 netdev_for_each_mc_addr(ha, netdev) {
641 addr = 0;
642 p = ha->addr;
643 for (i = 0; i < ETH_ALEN; i++) {
644 addr <<= 8;
645 addr |= *p++;
646 }
647 status = lv1_net_add_multicast_address(bus_id(card),
648 dev_id(card),
649 addr, 0);
650 if (status)
651 dev_err(ctodev(card),
652 "lv1_net_add_multicast_address failed, %d\n",
653 status);
654 }
655 }
656
657 /**
658 * gelic_net_stop - called upon ifconfig down
659 * @netdev: interface device structure
660 *
661 * always returns 0
662 */
gelic_net_stop(struct net_device * netdev)663 int gelic_net_stop(struct net_device *netdev)
664 {
665 struct gelic_card *card;
666
667 pr_debug("%s: start\n", __func__);
668
669 netif_stop_queue(netdev);
670 netif_carrier_off(netdev);
671
672 card = netdev_card(netdev);
673 gelic_card_down(card);
674
675 pr_debug("%s: done\n", __func__);
676 return 0;
677 }
678
679 /**
680 * gelic_card_get_next_tx_descr - returns the next available tx descriptor
681 * @card: device structure to get descriptor from
682 *
683 * returns the address of the next descriptor, or NULL if not available.
684 */
685 static struct gelic_descr *
gelic_card_get_next_tx_descr(struct gelic_card * card)686 gelic_card_get_next_tx_descr(struct gelic_card *card)
687 {
688 if (!card->tx_chain.head)
689 return NULL;
690 /* see if the next descriptor is free */
691 if (card->tx_chain.tail != card->tx_chain.head->next &&
692 gelic_descr_get_status(card->tx_chain.head) ==
693 GELIC_DESCR_DMA_NOT_IN_USE)
694 return card->tx_chain.head;
695 else
696 return NULL;
697
698 }
699
700 /**
701 * gelic_descr_set_tx_cmdstat - sets the tx descriptor command field
702 * @descr: descriptor structure to fill out
703 * @skb: packet to consider
704 *
705 * fills out the command and status field of the descriptor structure,
706 * depending on hardware checksum settings. This function assumes a wmb()
707 * has executed before.
708 */
gelic_descr_set_tx_cmdstat(struct gelic_descr * descr,struct sk_buff * skb)709 static void gelic_descr_set_tx_cmdstat(struct gelic_descr *descr,
710 struct sk_buff *skb)
711 {
712 if (skb->ip_summed != CHECKSUM_PARTIAL)
713 descr->hw_regs.dmac_cmd_status =
714 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
715 GELIC_DESCR_TX_DMA_FRAME_TAIL);
716 else {
717 /* is packet ip?
718 * if yes: tcp? udp? */
719 if (skb->protocol == htons(ETH_P_IP)) {
720 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
721 descr->hw_regs.dmac_cmd_status =
722 cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
723 GELIC_DESCR_TX_DMA_FRAME_TAIL);
724
725 else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
726 descr->hw_regs.dmac_cmd_status =
727 cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
728 GELIC_DESCR_TX_DMA_FRAME_TAIL);
729 else /*
730 * the stack should checksum non-tcp and non-udp
731 * packets on his own: NETIF_F_IP_CSUM
732 */
733 descr->hw_regs.dmac_cmd_status =
734 cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
735 GELIC_DESCR_TX_DMA_FRAME_TAIL);
736 }
737 }
738 }
739
gelic_put_vlan_tag(struct sk_buff * skb,unsigned short tag)740 static struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb,
741 unsigned short tag)
742 {
743 struct vlan_ethhdr *veth;
744 static unsigned int c;
745
746 if (skb_headroom(skb) < VLAN_HLEN) {
747 struct sk_buff *sk_tmp = skb;
748 pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c);
749 skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN);
750 if (!skb)
751 return NULL;
752 dev_kfree_skb_any(sk_tmp);
753 }
754 veth = skb_push(skb, VLAN_HLEN);
755
756 /* Move the mac addresses to the top of buffer */
757 memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
758
759 veth->h_vlan_proto = cpu_to_be16(ETH_P_8021Q);
760 veth->h_vlan_TCI = htons(tag);
761
762 return skb;
763 }
764
765 /**
766 * gelic_descr_prepare_tx - setup a descriptor for sending packets
767 * @card: card structure
768 * @descr: descriptor structure
769 * @skb: packet to use
770 *
771 * returns 0 on success, <0 on failure.
772 *
773 */
gelic_descr_prepare_tx(struct gelic_card * card,struct gelic_descr * descr,struct sk_buff * skb)774 static int gelic_descr_prepare_tx(struct gelic_card *card,
775 struct gelic_descr *descr,
776 struct sk_buff *skb)
777 {
778 dma_addr_t buf;
779
780 if (card->vlan_required) {
781 struct sk_buff *skb_tmp;
782 enum gelic_port_type type;
783
784 type = netdev_port(skb->dev)->type;
785 skb_tmp = gelic_put_vlan_tag(skb,
786 card->vlan[type].tx);
787 if (!skb_tmp)
788 return -ENOMEM;
789 skb = skb_tmp;
790 }
791
792 buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE);
793
794 if (dma_mapping_error(ctodev(card), buf)) {
795 dev_err(ctodev(card),
796 "dma map 2 failed (%p, %i). Dropping packet\n",
797 skb->data, skb->len);
798 return -ENOMEM;
799 }
800
801 descr->hw_regs.payload.dev_addr = cpu_to_be32(buf);
802 descr->hw_regs.payload.size = cpu_to_be32(skb->len);
803 descr->skb = skb;
804 descr->hw_regs.data_status = 0;
805 descr->hw_regs.next_descr_addr = 0; /* terminate hw descr */
806 gelic_descr_set_tx_cmdstat(descr, skb);
807
808 /* bump free descriptor pointer */
809 card->tx_chain.head = descr->next;
810 return 0;
811 }
812
813 /**
814 * gelic_card_kick_txdma - enables TX DMA processing
815 * @card: card structure
816 * @descr: descriptor address to enable TX processing at
817 *
818 */
gelic_card_kick_txdma(struct gelic_card * card,struct gelic_descr * descr)819 static int gelic_card_kick_txdma(struct gelic_card *card,
820 struct gelic_descr *descr)
821 {
822 int status = 0;
823
824 if (card->tx_dma_progress)
825 return 0;
826
827 if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
828 card->tx_dma_progress = 1;
829 status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
830 descr->link.cpu_addr, 0);
831 if (status) {
832 card->tx_dma_progress = 0;
833 dev_info(ctodev(card), "lv1_net_start_txdma failed," \
834 "status=%d\n", status);
835 }
836 }
837 return status;
838 }
839
840 /**
841 * gelic_net_xmit - transmits a frame over the device
842 * @skb: packet to send out
843 * @netdev: interface device structure
844 *
845 * returns NETDEV_TX_OK on success, NETDEV_TX_BUSY on failure
846 */
gelic_net_xmit(struct sk_buff * skb,struct net_device * netdev)847 netdev_tx_t gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
848 {
849 struct gelic_card *card = netdev_card(netdev);
850 struct gelic_descr *descr;
851 int result;
852 unsigned long flags;
853
854 spin_lock_irqsave(&card->tx_lock, flags);
855
856 gelic_card_release_tx_chain(card, 0);
857
858 descr = gelic_card_get_next_tx_descr(card);
859 if (!descr) {
860 /*
861 * no more descriptors free
862 */
863 gelic_card_stop_queues(card);
864 spin_unlock_irqrestore(&card->tx_lock, flags);
865 return NETDEV_TX_BUSY;
866 }
867
868 result = gelic_descr_prepare_tx(card, descr, skb);
869 if (result) {
870 /*
871 * DMA map failed. As chances are that failure
872 * would continue, just release skb and return
873 */
874 netdev->stats.tx_dropped++;
875 dev_kfree_skb_any(skb);
876 spin_unlock_irqrestore(&card->tx_lock, flags);
877 return NETDEV_TX_OK;
878 }
879 /*
880 * link this prepared descriptor to previous one
881 * to achieve high performance
882 */
883 descr->prev->hw_regs.next_descr_addr =
884 cpu_to_be32(descr->link.cpu_addr);
885 /*
886 * as hardware descriptor is modified in the above lines,
887 * ensure that the hardware sees it
888 */
889 wmb();
890 if (gelic_card_kick_txdma(card, descr)) {
891 /*
892 * kick failed.
893 * release descriptor which was just prepared
894 */
895 netdev->stats.tx_dropped++;
896 /* don't trigger BUG_ON() in gelic_descr_release_tx */
897 descr->hw_regs.data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
898 gelic_descr_release_tx(card, descr);
899 /* reset head */
900 card->tx_chain.head = descr;
901 /* reset hw termination */
902 descr->prev->hw_regs.next_descr_addr = 0;
903 dev_info(ctodev(card), "%s: kick failure\n", __func__);
904 }
905
906 spin_unlock_irqrestore(&card->tx_lock, flags);
907 return NETDEV_TX_OK;
908 }
909
910 /**
911 * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on
912 * @descr: descriptor to process
913 * @card: card structure
914 * @netdev: net_device structure to be passed packet
915 *
916 * iommu-unmaps the skb, fills out skb structure and passes the data to the
917 * stack. The descriptor state is not changed.
918 */
gelic_net_pass_skb_up(struct gelic_descr * descr,struct gelic_card * card,struct net_device * netdev)919 static void gelic_net_pass_skb_up(struct gelic_descr *descr,
920 struct gelic_card *card,
921 struct net_device *netdev)
922
923 {
924 struct sk_buff *skb = descr->skb;
925 u32 data_status, data_error;
926
927 data_status = be32_to_cpu(descr->hw_regs.data_status);
928 data_error = be32_to_cpu(descr->hw_regs.data_error);
929 /* unmap skb buffer */
930 dma_unmap_single(ctodev(card),
931 be32_to_cpu(descr->hw_regs.payload.dev_addr),
932 be32_to_cpu(descr->hw_regs.payload.size), DMA_FROM_DEVICE);
933
934 skb_put(skb, be32_to_cpu(descr->hw_regs.valid_size)?
935 be32_to_cpu(descr->hw_regs.valid_size) :
936 be32_to_cpu(descr->hw_regs.result_size));
937 if (!descr->hw_regs.valid_size)
938 dev_info(ctodev(card), "buffer full %x %x %x\n",
939 be32_to_cpu(descr->hw_regs.result_size),
940 be32_to_cpu(descr->hw_regs.payload.size),
941 be32_to_cpu(descr->hw_regs.dmac_cmd_status));
942
943 descr->skb = NULL;
944 /*
945 * the card put 2 bytes vlan tag in front
946 * of the ethernet frame
947 */
948 skb_pull(skb, 2);
949 skb->protocol = eth_type_trans(skb, netdev);
950
951 /* checksum offload */
952 if (netdev->features & NETIF_F_RXCSUM) {
953 if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
954 (!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
955 skb->ip_summed = CHECKSUM_UNNECESSARY;
956 else
957 skb_checksum_none_assert(skb);
958 } else
959 skb_checksum_none_assert(skb);
960
961 /* update netdevice statistics */
962 netdev->stats.rx_packets++;
963 netdev->stats.rx_bytes += skb->len;
964
965 /* pass skb up to stack */
966 netif_receive_skb(skb);
967 }
968
969 /**
970 * gelic_card_decode_one_descr - processes an rx descriptor
971 * @card: card structure
972 *
973 * returns 1 if a packet has been sent to the stack, otherwise 0
974 *
975 * processes an rx descriptor by iommu-unmapping the data buffer and passing
976 * the packet up to the stack
977 */
gelic_card_decode_one_descr(struct gelic_card * card)978 static int gelic_card_decode_one_descr(struct gelic_card *card)
979 {
980 enum gelic_descr_dma_status status;
981 struct gelic_descr_chain *chain = &card->rx_chain;
982 struct gelic_descr *descr = chain->head;
983 struct net_device *netdev = NULL;
984 int dmac_chain_ended;
985
986 status = gelic_descr_get_status(descr);
987
988 if (status == GELIC_DESCR_DMA_CARDOWNED)
989 return 0;
990
991 if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
992 dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
993 return 0;
994 }
995
996 /* netdevice select */
997 if (card->vlan_required) {
998 unsigned int i;
999 u16 vid;
1000 vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
1001 for (i = 0; i < GELIC_PORT_MAX; i++) {
1002 if (card->vlan[i].rx == vid) {
1003 netdev = card->netdev[i];
1004 break;
1005 }
1006 }
1007 if (GELIC_PORT_MAX <= i) {
1008 pr_info("%s: unknown packet vid=%x\n", __func__, vid);
1009 goto refill;
1010 }
1011 } else
1012 netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1013
1014 if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
1015 (status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
1016 (status == GELIC_DESCR_DMA_FORCE_END)) {
1017 dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
1018 status);
1019 netdev->stats.rx_dropped++;
1020 goto refill;
1021 }
1022
1023 if (status == GELIC_DESCR_DMA_BUFFER_FULL) {
1024 /*
1025 * Buffer full would occur if and only if
1026 * the frame length was longer than the size of this
1027 * descriptor's buffer. If the frame length was equal
1028 * to or shorter than buffer'size, FRAME_END condition
1029 * would occur.
1030 * Anyway this frame was longer than the MTU,
1031 * just drop it.
1032 */
1033 dev_info(ctodev(card), "overlength frame\n");
1034 goto refill;
1035 }
1036 /*
1037 * descriptors any other than FRAME_END here should
1038 * be treated as error.
1039 */
1040 if (status != GELIC_DESCR_DMA_FRAME_END) {
1041 dev_dbg(ctodev(card), "RX descriptor with state %x\n",
1042 status);
1043 goto refill;
1044 }
1045
1046 /* ok, we've got a packet in descr */
1047 gelic_net_pass_skb_up(descr, card, netdev);
1048 refill:
1049
1050 /* is the current descriptor terminated with next_descr == NULL? */
1051 dmac_chain_ended =
1052 be32_to_cpu(descr->hw_regs.dmac_cmd_status) &
1053 GELIC_DESCR_RX_DMA_CHAIN_END;
1054 /*
1055 * So that always DMAC can see the end
1056 * of the descriptor chain to avoid
1057 * from unwanted DMAC overrun.
1058 */
1059 descr->hw_regs.next_descr_addr = 0;
1060
1061 /* change the descriptor state: */
1062 gelic_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
1063
1064 /*
1065 * this call can fail, but for now, just leave this
1066 * descriptor without skb
1067 */
1068 gelic_descr_prepare_rx(card, descr);
1069
1070 chain->tail = descr;
1071 chain->head = descr->next;
1072
1073 /*
1074 * Set this descriptor the end of the chain.
1075 */
1076 descr->prev->hw_regs.next_descr_addr =
1077 cpu_to_be32(descr->link.cpu_addr);
1078
1079 /*
1080 * If dmac chain was met, DMAC stopped.
1081 * thus re-enable it
1082 */
1083
1084 if (dmac_chain_ended)
1085 gelic_card_enable_rxdmac(card);
1086
1087 return 1;
1088 }
1089
1090 /**
1091 * gelic_net_poll - NAPI poll function called by the stack to return packets
1092 * @napi: napi structure
1093 * @budget: number of packets we can pass to the stack at most
1094 *
1095 * returns the number of the processed packets
1096 *
1097 */
gelic_net_poll(struct napi_struct * napi,int budget)1098 static int gelic_net_poll(struct napi_struct *napi, int budget)
1099 {
1100 struct gelic_card *card = container_of(napi, struct gelic_card, napi);
1101 int packets_done = 0;
1102
1103 while (packets_done < budget) {
1104 if (!gelic_card_decode_one_descr(card))
1105 break;
1106
1107 packets_done++;
1108 }
1109
1110 if (packets_done < budget) {
1111 napi_complete_done(napi, packets_done);
1112 gelic_card_rx_irq_on(card);
1113 }
1114 return packets_done;
1115 }
1116
1117 /*
1118 * gelic_card_interrupt - event handler for gelic_net
1119 */
gelic_card_interrupt(int irq,void * ptr)1120 static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
1121 {
1122 unsigned long flags;
1123 struct gelic_card *card = ptr;
1124 u64 status;
1125
1126 status = card->irq_status;
1127
1128 if (!status)
1129 return IRQ_NONE;
1130
1131 status &= card->irq_mask;
1132
1133 if (status & GELIC_CARD_RXINT) {
1134 gelic_card_rx_irq_off(card);
1135 napi_schedule(&card->napi);
1136 }
1137
1138 if (status & GELIC_CARD_TXINT) {
1139 spin_lock_irqsave(&card->tx_lock, flags);
1140 card->tx_dma_progress = 0;
1141 gelic_card_release_tx_chain(card, 0);
1142 /* kick outstanding tx descriptor if any */
1143 gelic_card_kick_txdma(card, card->tx_chain.tail);
1144 spin_unlock_irqrestore(&card->tx_lock, flags);
1145 }
1146
1147 /* ether port status changed */
1148 if (status & GELIC_CARD_PORT_STATUS_CHANGED)
1149 gelic_card_get_ether_port_status(card, 1);
1150
1151 #ifdef CONFIG_GELIC_WIRELESS
1152 if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
1153 GELIC_CARD_WLAN_COMMAND_COMPLETED))
1154 gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
1155 #endif
1156
1157 return IRQ_HANDLED;
1158 }
1159
1160 #ifdef CONFIG_NET_POLL_CONTROLLER
1161 /**
1162 * gelic_net_poll_controller - artificial interrupt for netconsole etc.
1163 * @netdev: interface device structure
1164 *
1165 * see Documentation/networking/netconsole.rst
1166 */
gelic_net_poll_controller(struct net_device * netdev)1167 void gelic_net_poll_controller(struct net_device *netdev)
1168 {
1169 struct gelic_card *card = netdev_card(netdev);
1170
1171 gelic_card_set_irq_mask(card, 0);
1172 gelic_card_interrupt(netdev->irq, netdev);
1173 gelic_card_set_irq_mask(card, card->irq_mask);
1174 }
1175 #endif /* CONFIG_NET_POLL_CONTROLLER */
1176
1177 /**
1178 * gelic_net_open - called upon ifconfig up
1179 * @netdev: interface device structure
1180 *
1181 * returns 0 on success, <0 on failure
1182 *
1183 * gelic_net_open allocates all the descriptors and memory needed for
1184 * operation, sets up multicast list and enables interrupts
1185 */
gelic_net_open(struct net_device * netdev)1186 int gelic_net_open(struct net_device *netdev)
1187 {
1188 struct gelic_card *card = netdev_card(netdev);
1189
1190 dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
1191
1192 gelic_card_up(card);
1193
1194 netif_start_queue(netdev);
1195 gelic_card_get_ether_port_status(card, 1);
1196
1197 dev_dbg(ctodev(card), " <- %s\n", __func__);
1198 return 0;
1199 }
1200
gelic_net_get_drvinfo(struct net_device * netdev,struct ethtool_drvinfo * info)1201 void gelic_net_get_drvinfo(struct net_device *netdev,
1202 struct ethtool_drvinfo *info)
1203 {
1204 strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1205 strscpy(info->version, DRV_VERSION, sizeof(info->version));
1206 }
1207
gelic_ether_get_link_ksettings(struct net_device * netdev,struct ethtool_link_ksettings * cmd)1208 static int gelic_ether_get_link_ksettings(struct net_device *netdev,
1209 struct ethtool_link_ksettings *cmd)
1210 {
1211 struct gelic_card *card = netdev_card(netdev);
1212 u32 supported, advertising;
1213
1214 gelic_card_get_ether_port_status(card, 0);
1215
1216 if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
1217 cmd->base.duplex = DUPLEX_FULL;
1218 else
1219 cmd->base.duplex = DUPLEX_HALF;
1220
1221 switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
1222 case GELIC_LV1_ETHER_SPEED_10:
1223 cmd->base.speed = SPEED_10;
1224 break;
1225 case GELIC_LV1_ETHER_SPEED_100:
1226 cmd->base.speed = SPEED_100;
1227 break;
1228 case GELIC_LV1_ETHER_SPEED_1000:
1229 cmd->base.speed = SPEED_1000;
1230 break;
1231 default:
1232 pr_info("%s: speed unknown\n", __func__);
1233 cmd->base.speed = SPEED_10;
1234 break;
1235 }
1236
1237 supported = SUPPORTED_TP | SUPPORTED_Autoneg |
1238 SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
1239 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
1240 SUPPORTED_1000baseT_Full;
1241 advertising = supported;
1242 if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
1243 cmd->base.autoneg = AUTONEG_ENABLE;
1244 } else {
1245 cmd->base.autoneg = AUTONEG_DISABLE;
1246 advertising &= ~ADVERTISED_Autoneg;
1247 }
1248 cmd->base.port = PORT_TP;
1249
1250 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
1251 supported);
1252 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
1253 advertising);
1254
1255 return 0;
1256 }
1257
1258 static int
gelic_ether_set_link_ksettings(struct net_device * netdev,const struct ethtool_link_ksettings * cmd)1259 gelic_ether_set_link_ksettings(struct net_device *netdev,
1260 const struct ethtool_link_ksettings *cmd)
1261 {
1262 struct gelic_card *card = netdev_card(netdev);
1263 u64 mode;
1264 int ret;
1265
1266 if (cmd->base.autoneg == AUTONEG_ENABLE) {
1267 mode = GELIC_LV1_ETHER_AUTO_NEG;
1268 } else {
1269 switch (cmd->base.speed) {
1270 case SPEED_10:
1271 mode = GELIC_LV1_ETHER_SPEED_10;
1272 break;
1273 case SPEED_100:
1274 mode = GELIC_LV1_ETHER_SPEED_100;
1275 break;
1276 case SPEED_1000:
1277 mode = GELIC_LV1_ETHER_SPEED_1000;
1278 break;
1279 default:
1280 return -EINVAL;
1281 }
1282 if (cmd->base.duplex == DUPLEX_FULL) {
1283 mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
1284 } else if (cmd->base.speed == SPEED_1000) {
1285 pr_info("1000 half duplex is not supported.\n");
1286 return -EINVAL;
1287 }
1288 }
1289
1290 ret = gelic_card_set_link_mode(card, mode);
1291
1292 if (ret)
1293 return ret;
1294
1295 return 0;
1296 }
1297
gelic_net_get_wol(struct net_device * netdev,struct ethtool_wolinfo * wol)1298 static void gelic_net_get_wol(struct net_device *netdev,
1299 struct ethtool_wolinfo *wol)
1300 {
1301 if (0 <= ps3_compare_firmware_version(2, 2, 0))
1302 wol->supported = WAKE_MAGIC;
1303 else
1304 wol->supported = 0;
1305
1306 wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
1307 memset(&wol->sopass, 0, sizeof(wol->sopass));
1308 }
gelic_net_set_wol(struct net_device * netdev,struct ethtool_wolinfo * wol)1309 static int gelic_net_set_wol(struct net_device *netdev,
1310 struct ethtool_wolinfo *wol)
1311 {
1312 int status;
1313 struct gelic_card *card;
1314 u64 v1, v2;
1315
1316 if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
1317 !capable(CAP_NET_ADMIN))
1318 return -EPERM;
1319
1320 if (wol->wolopts & ~WAKE_MAGIC)
1321 return -EINVAL;
1322
1323 card = netdev_card(netdev);
1324 if (wol->wolopts & WAKE_MAGIC) {
1325 status = lv1_net_control(bus_id(card), dev_id(card),
1326 GELIC_LV1_SET_WOL,
1327 GELIC_LV1_WOL_MAGIC_PACKET,
1328 0, GELIC_LV1_WOL_MP_ENABLE,
1329 &v1, &v2);
1330 if (status) {
1331 pr_info("%s: enabling WOL failed %d\n", __func__,
1332 status);
1333 status = -EIO;
1334 goto done;
1335 }
1336 status = lv1_net_control(bus_id(card), dev_id(card),
1337 GELIC_LV1_SET_WOL,
1338 GELIC_LV1_WOL_ADD_MATCH_ADDR,
1339 0, GELIC_LV1_WOL_MATCH_ALL,
1340 &v1, &v2);
1341 if (!status)
1342 ps3_sys_manager_set_wol(1);
1343 else {
1344 pr_info("%s: enabling WOL filter failed %d\n",
1345 __func__, status);
1346 status = -EIO;
1347 }
1348 } else {
1349 status = lv1_net_control(bus_id(card), dev_id(card),
1350 GELIC_LV1_SET_WOL,
1351 GELIC_LV1_WOL_MAGIC_PACKET,
1352 0, GELIC_LV1_WOL_MP_DISABLE,
1353 &v1, &v2);
1354 if (status) {
1355 pr_info("%s: disabling WOL failed %d\n", __func__,
1356 status);
1357 status = -EIO;
1358 goto done;
1359 }
1360 status = lv1_net_control(bus_id(card), dev_id(card),
1361 GELIC_LV1_SET_WOL,
1362 GELIC_LV1_WOL_DELETE_MATCH_ADDR,
1363 0, GELIC_LV1_WOL_MATCH_ALL,
1364 &v1, &v2);
1365 if (!status)
1366 ps3_sys_manager_set_wol(0);
1367 else {
1368 pr_info("%s: removing WOL filter failed %d\n",
1369 __func__, status);
1370 status = -EIO;
1371 }
1372 }
1373 done:
1374 return status;
1375 }
1376
1377 static const struct ethtool_ops gelic_ether_ethtool_ops = {
1378 .get_drvinfo = gelic_net_get_drvinfo,
1379 .get_link = ethtool_op_get_link,
1380 .get_wol = gelic_net_get_wol,
1381 .set_wol = gelic_net_set_wol,
1382 .get_link_ksettings = gelic_ether_get_link_ksettings,
1383 .set_link_ksettings = gelic_ether_set_link_ksettings,
1384 };
1385
1386 /**
1387 * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout
1388 * function (to be called not under interrupt status)
1389 * @work: work is context of tx timout task
1390 *
1391 * called as task when tx hangs, resets interface (if interface is up)
1392 */
gelic_net_tx_timeout_task(struct work_struct * work)1393 static void gelic_net_tx_timeout_task(struct work_struct *work)
1394 {
1395 struct gelic_card *card =
1396 container_of(work, struct gelic_card, tx_timeout_task);
1397 struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
1398
1399 dev_info(ctodev(card), "%s:Timed out. Restarting...\n", __func__);
1400
1401 if (!(netdev->flags & IFF_UP))
1402 goto out;
1403
1404 netif_device_detach(netdev);
1405 gelic_net_stop(netdev);
1406
1407 gelic_net_open(netdev);
1408 netif_device_attach(netdev);
1409
1410 out:
1411 atomic_dec(&card->tx_timeout_task_counter);
1412 }
1413
1414 /**
1415 * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in.
1416 * @netdev: interface device structure
1417 * @txqueue: unused
1418 *
1419 * called, if tx hangs. Schedules a task that resets the interface
1420 */
gelic_net_tx_timeout(struct net_device * netdev,unsigned int txqueue)1421 void gelic_net_tx_timeout(struct net_device *netdev, unsigned int txqueue)
1422 {
1423 struct gelic_card *card;
1424
1425 card = netdev_card(netdev);
1426 atomic_inc(&card->tx_timeout_task_counter);
1427 if (netdev->flags & IFF_UP)
1428 schedule_work(&card->tx_timeout_task);
1429 else
1430 atomic_dec(&card->tx_timeout_task_counter);
1431 }
1432
1433 static const struct net_device_ops gelic_netdevice_ops = {
1434 .ndo_open = gelic_net_open,
1435 .ndo_stop = gelic_net_stop,
1436 .ndo_start_xmit = gelic_net_xmit,
1437 .ndo_set_rx_mode = gelic_net_set_multi,
1438 .ndo_tx_timeout = gelic_net_tx_timeout,
1439 .ndo_set_mac_address = eth_mac_addr,
1440 .ndo_validate_addr = eth_validate_addr,
1441 #ifdef CONFIG_NET_POLL_CONTROLLER
1442 .ndo_poll_controller = gelic_net_poll_controller,
1443 #endif
1444 };
1445
1446 /**
1447 * gelic_ether_setup_netdev_ops - initialization of net_device operations
1448 * @netdev: net_device structure
1449 * @napi: napi structure
1450 *
1451 * fills out function pointers in the net_device structure
1452 */
gelic_ether_setup_netdev_ops(struct net_device * netdev,struct napi_struct * napi)1453 static void gelic_ether_setup_netdev_ops(struct net_device *netdev,
1454 struct napi_struct *napi)
1455 {
1456 netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
1457 /* NAPI */
1458 netif_napi_add(netdev, napi, gelic_net_poll);
1459 netdev->ethtool_ops = &gelic_ether_ethtool_ops;
1460 netdev->netdev_ops = &gelic_netdevice_ops;
1461 }
1462
1463 /**
1464 * gelic_net_setup_netdev - initialization of net_device
1465 * @netdev: net_device structure
1466 * @card: card structure
1467 *
1468 * Returns 0 on success or <0 on failure
1469 *
1470 * gelic_ether_setup_netdev initializes the net_device structure
1471 * and register it.
1472 **/
gelic_net_setup_netdev(struct net_device * netdev,struct gelic_card * card)1473 int gelic_net_setup_netdev(struct net_device *netdev, struct gelic_card *card)
1474 {
1475 int status;
1476 u64 v1, v2;
1477
1478 netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1479
1480 netdev->features = NETIF_F_IP_CSUM;
1481 if (GELIC_CARD_RX_CSUM_DEFAULT)
1482 netdev->features |= NETIF_F_RXCSUM;
1483
1484 status = lv1_net_control(bus_id(card), dev_id(card),
1485 GELIC_LV1_GET_MAC_ADDRESS,
1486 0, 0, 0, &v1, &v2);
1487 v1 <<= 16;
1488 if (status || !is_valid_ether_addr((u8 *)&v1)) {
1489 dev_info(ctodev(card),
1490 "%s:lv1_net_control GET_MAC_ADDR failed %d\n",
1491 __func__, status);
1492 return -EINVAL;
1493 }
1494 eth_hw_addr_set(netdev, (u8 *)&v1);
1495
1496 if (card->vlan_required) {
1497 netdev->hard_header_len += VLAN_HLEN;
1498 /*
1499 * As vlan is internally used,
1500 * we can not receive vlan packets
1501 */
1502 netdev->features |= NETIF_F_VLAN_CHALLENGED;
1503 }
1504
1505 /* MTU range: 64 - 1518 */
1506 netdev->min_mtu = GELIC_NET_MIN_MTU;
1507 netdev->max_mtu = GELIC_NET_MAX_MTU;
1508
1509 status = register_netdev(netdev);
1510 if (status) {
1511 dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
1512 __func__, netdev->name, status);
1513 return status;
1514 }
1515 dev_info(ctodev(card), "%s: MAC addr %pM\n",
1516 netdev->name, netdev->dev_addr);
1517
1518 return 0;
1519 }
1520
1521 #define GELIC_ALIGN (32)
1522
1523 /**
1524 * gelic_alloc_card_net - allocates net_device and card structure
1525 * @netdev: interface device structure
1526 *
1527 * returns the card structure or NULL in case of errors
1528 *
1529 * the card and net_device structures are linked to each other
1530 */
gelic_alloc_card_net(struct net_device ** netdev)1531 static struct gelic_card *gelic_alloc_card_net(struct net_device **netdev)
1532 {
1533 struct gelic_card *card;
1534 struct gelic_port *port;
1535 void *p;
1536 size_t alloc_size;
1537 /*
1538 * gelic requires dma descriptor is 32 bytes aligned and
1539 * the hypervisor requires irq_status is 8 bytes aligned.
1540 */
1541 BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
1542 BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
1543 alloc_size =
1544 sizeof(struct gelic_card) +
1545 sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
1546 sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
1547 GELIC_ALIGN - 1;
1548
1549 p = kzalloc(alloc_size, GFP_KERNEL);
1550 if (!p)
1551 return NULL;
1552 card = PTR_ALIGN(p, GELIC_ALIGN);
1553 card->unalign = p;
1554
1555 /*
1556 * alloc netdev
1557 */
1558 *netdev = alloc_etherdev(sizeof(struct gelic_port));
1559 if (!*netdev) {
1560 kfree(card->unalign);
1561 return NULL;
1562 }
1563 port = netdev_priv(*netdev);
1564
1565 /* gelic_port */
1566 port->netdev = *netdev;
1567 port->card = card;
1568 port->type = GELIC_PORT_ETHERNET_0;
1569
1570 /* gelic_card */
1571 card->netdev[GELIC_PORT_ETHERNET_0] = *netdev;
1572
1573 INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task);
1574 init_waitqueue_head(&card->waitq);
1575 atomic_set(&card->tx_timeout_task_counter, 0);
1576 mutex_init(&card->updown_lock);
1577 atomic_set(&card->users, 0);
1578
1579 return card;
1580 }
1581
gelic_card_get_vlan_info(struct gelic_card * card)1582 static void gelic_card_get_vlan_info(struct gelic_card *card)
1583 {
1584 u64 v1, v2;
1585 int status;
1586 unsigned int i;
1587 struct {
1588 int tx;
1589 int rx;
1590 } vlan_id_ix[2] = {
1591 [GELIC_PORT_ETHERNET_0] = {
1592 .tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
1593 .rx = GELIC_LV1_VLAN_RX_ETHERNET_0
1594 },
1595 [GELIC_PORT_WIRELESS] = {
1596 .tx = GELIC_LV1_VLAN_TX_WIRELESS,
1597 .rx = GELIC_LV1_VLAN_RX_WIRELESS
1598 }
1599 };
1600
1601 for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
1602 /* tx tag */
1603 status = lv1_net_control(bus_id(card), dev_id(card),
1604 GELIC_LV1_GET_VLAN_ID,
1605 vlan_id_ix[i].tx,
1606 0, 0, &v1, &v2);
1607 if (status || !v1) {
1608 if (status != LV1_NO_ENTRY)
1609 dev_dbg(ctodev(card),
1610 "get vlan id for tx(%d) failed(%d)\n",
1611 vlan_id_ix[i].tx, status);
1612 card->vlan[i].tx = 0;
1613 card->vlan[i].rx = 0;
1614 continue;
1615 }
1616 card->vlan[i].tx = (u16)v1;
1617
1618 /* rx tag */
1619 status = lv1_net_control(bus_id(card), dev_id(card),
1620 GELIC_LV1_GET_VLAN_ID,
1621 vlan_id_ix[i].rx,
1622 0, 0, &v1, &v2);
1623 if (status || !v1) {
1624 if (status != LV1_NO_ENTRY)
1625 dev_info(ctodev(card),
1626 "get vlan id for rx(%d) failed(%d)\n",
1627 vlan_id_ix[i].rx, status);
1628 card->vlan[i].tx = 0;
1629 card->vlan[i].rx = 0;
1630 continue;
1631 }
1632 card->vlan[i].rx = (u16)v1;
1633
1634 dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
1635 i, card->vlan[i].tx, card->vlan[i].rx);
1636 }
1637
1638 if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
1639 BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
1640 card->vlan_required = 1;
1641 } else
1642 card->vlan_required = 0;
1643
1644 /* check wirelss capable firmware */
1645 if (ps3_compare_firmware_version(1, 6, 0) < 0) {
1646 card->vlan[GELIC_PORT_WIRELESS].tx = 0;
1647 card->vlan[GELIC_PORT_WIRELESS].rx = 0;
1648 }
1649
1650 dev_info(ctodev(card), "internal vlan %s\n",
1651 card->vlan_required? "enabled" : "disabled");
1652 }
1653 /*
1654 * ps3_gelic_driver_probe - add a device to the control of this driver
1655 */
ps3_gelic_driver_probe(struct ps3_system_bus_device * dev)1656 static int ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
1657 {
1658 struct gelic_card *card;
1659 struct net_device *netdev;
1660 int result;
1661
1662 pr_debug("%s: called\n", __func__);
1663
1664 udbg_shutdown_ps3gelic();
1665
1666 result = ps3_open_hv_device(dev);
1667
1668 if (result) {
1669 dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
1670 __func__);
1671 goto fail_open;
1672 }
1673
1674 result = ps3_dma_region_create(dev->d_region);
1675
1676 if (result) {
1677 dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
1678 __func__, result);
1679 BUG_ON("check region type");
1680 goto fail_dma_region;
1681 }
1682
1683 /* alloc card/netdevice */
1684 card = gelic_alloc_card_net(&netdev);
1685 if (!card) {
1686 dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
1687 __func__);
1688 result = -ENOMEM;
1689 goto fail_alloc_card;
1690 }
1691 ps3_system_bus_set_drvdata(dev, card);
1692 card->dev = dev;
1693
1694 /* get internal vlan info */
1695 gelic_card_get_vlan_info(card);
1696
1697 card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
1698
1699 /* setup interrupt */
1700 result = lv1_net_set_interrupt_status_indicator(bus_id(card),
1701 dev_id(card),
1702 ps3_mm_phys_to_lpar(__pa(&card->irq_status)),
1703 0);
1704
1705 if (result) {
1706 dev_dbg(&dev->core,
1707 "%s:set_interrupt_status_indicator failed: %s\n",
1708 __func__, ps3_result(result));
1709 result = -EIO;
1710 goto fail_status_indicator;
1711 }
1712
1713 result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
1714 &card->irq);
1715
1716 if (result) {
1717 dev_info(ctodev(card),
1718 "%s:gelic_net_open_device failed (%d)\n",
1719 __func__, result);
1720 result = -EPERM;
1721 goto fail_alloc_irq;
1722 }
1723 result = request_irq(card->irq, gelic_card_interrupt,
1724 0, netdev->name, card);
1725
1726 if (result) {
1727 dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
1728 __func__, result);
1729 goto fail_request_irq;
1730 }
1731
1732 /* setup card structure */
1733 card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
1734 GELIC_CARD_PORT_STATUS_CHANGED;
1735
1736
1737 result = gelic_card_init_chain(card, &card->tx_chain,
1738 card->descr, GELIC_NET_TX_DESCRIPTORS);
1739 if (result)
1740 goto fail_alloc_tx;
1741 result = gelic_card_init_chain(card, &card->rx_chain,
1742 card->descr + GELIC_NET_TX_DESCRIPTORS,
1743 GELIC_NET_RX_DESCRIPTORS);
1744 if (result)
1745 goto fail_alloc_rx;
1746
1747 /* head of chain */
1748 card->tx_top = card->tx_chain.head;
1749 card->rx_top = card->rx_chain.head;
1750 dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n",
1751 card->rx_top, card->tx_top, sizeof(struct gelic_descr),
1752 GELIC_NET_RX_DESCRIPTORS);
1753 /* allocate rx skbs */
1754 result = gelic_card_alloc_rx_skbs(card);
1755 if (result)
1756 goto fail_alloc_skbs;
1757
1758 spin_lock_init(&card->tx_lock);
1759 card->tx_dma_progress = 0;
1760
1761 /* setup net_device structure */
1762 netdev->irq = card->irq;
1763 SET_NETDEV_DEV(netdev, &card->dev->core);
1764 gelic_ether_setup_netdev_ops(netdev, &card->napi);
1765 result = gelic_net_setup_netdev(netdev, card);
1766 if (result) {
1767 dev_dbg(&dev->core, "%s: setup_netdev failed %d\n",
1768 __func__, result);
1769 goto fail_setup_netdev;
1770 }
1771
1772 #ifdef CONFIG_GELIC_WIRELESS
1773 result = gelic_wl_driver_probe(card);
1774 if (result) {
1775 dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
1776 goto fail_setup_netdev;
1777 }
1778 #endif
1779 pr_debug("%s: done\n", __func__);
1780 return 0;
1781
1782 fail_setup_netdev:
1783 fail_alloc_skbs:
1784 gelic_card_free_chain(card, card->rx_chain.head);
1785 fail_alloc_rx:
1786 gelic_card_free_chain(card, card->tx_chain.head);
1787 fail_alloc_tx:
1788 free_irq(card->irq, card);
1789 netdev->irq = 0;
1790 fail_request_irq:
1791 ps3_sb_event_receive_port_destroy(dev, card->irq);
1792 fail_alloc_irq:
1793 lv1_net_set_interrupt_status_indicator(bus_id(card),
1794 bus_id(card),
1795 0, 0);
1796 fail_status_indicator:
1797 ps3_system_bus_set_drvdata(dev, NULL);
1798 kfree(netdev_card(netdev)->unalign);
1799 free_netdev(netdev);
1800 fail_alloc_card:
1801 ps3_dma_region_free(dev->d_region);
1802 fail_dma_region:
1803 ps3_close_hv_device(dev);
1804 fail_open:
1805 return result;
1806 }
1807
1808 /*
1809 * ps3_gelic_driver_remove - remove a device from the control of this driver
1810 */
1811
ps3_gelic_driver_remove(struct ps3_system_bus_device * dev)1812 static void ps3_gelic_driver_remove(struct ps3_system_bus_device *dev)
1813 {
1814 struct gelic_card *card = ps3_system_bus_get_drvdata(dev);
1815 struct net_device *netdev0;
1816 pr_debug("%s: called\n", __func__);
1817
1818 /* set auto-negotiation */
1819 gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
1820
1821 #ifdef CONFIG_GELIC_WIRELESS
1822 gelic_wl_driver_remove(card);
1823 #endif
1824 /* stop interrupt */
1825 gelic_card_set_irq_mask(card, 0);
1826
1827 /* turn off DMA, force end */
1828 gelic_card_disable_rxdmac(card);
1829 gelic_card_disable_txdmac(card);
1830
1831 /* release chains */
1832 gelic_card_release_tx_chain(card, 1);
1833 gelic_card_release_rx_chain(card);
1834
1835 gelic_card_free_chain(card, card->tx_top);
1836 gelic_card_free_chain(card, card->rx_top);
1837
1838 netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
1839 /* disconnect event port */
1840 free_irq(card->irq, card);
1841 netdev0->irq = 0;
1842 ps3_sb_event_receive_port_destroy(card->dev, card->irq);
1843
1844 wait_event(card->waitq,
1845 atomic_read(&card->tx_timeout_task_counter) == 0);
1846
1847 lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card),
1848 0 , 0);
1849
1850 unregister_netdev(netdev0);
1851 kfree(netdev_card(netdev0)->unalign);
1852 free_netdev(netdev0);
1853
1854 ps3_system_bus_set_drvdata(dev, NULL);
1855
1856 ps3_dma_region_free(dev->d_region);
1857
1858 ps3_close_hv_device(dev);
1859
1860 pr_debug("%s: done\n", __func__);
1861 }
1862
1863 static struct ps3_system_bus_driver ps3_gelic_driver = {
1864 .match_id = PS3_MATCH_ID_GELIC,
1865 .probe = ps3_gelic_driver_probe,
1866 .remove = ps3_gelic_driver_remove,
1867 .shutdown = ps3_gelic_driver_remove,
1868 .core.name = "ps3_gelic_driver",
1869 .core.owner = THIS_MODULE,
1870 };
1871
ps3_gelic_driver_init(void)1872 static int __init ps3_gelic_driver_init (void)
1873 {
1874 return firmware_has_feature(FW_FEATURE_PS3_LV1)
1875 ? ps3_system_bus_driver_register(&ps3_gelic_driver)
1876 : -ENODEV;
1877 }
1878
ps3_gelic_driver_exit(void)1879 static void __exit ps3_gelic_driver_exit (void)
1880 {
1881 ps3_system_bus_driver_unregister(&ps3_gelic_driver);
1882 }
1883
1884 module_init(ps3_gelic_driver_init);
1885 module_exit(ps3_gelic_driver_exit);
1886
1887 MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);
1888
1889