1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Driver for Gigabit Ethernet adapters based on the Session Layer
4  * Interface (SLIC) technology by Alacritech. The driver does not
5  * support the hardware acceleration features provided by these cards.
6  *
7  * Copyright (C) 2016 Lino Sanfilippo <LinoSanfilippo@gmx.de>
8  */
9 
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/pci.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <linux/if_ether.h>
16 #include <linux/crc32.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/ethtool.h>
19 #include <linux/mii.h>
20 #include <linux/interrupt.h>
21 #include <linux/delay.h>
22 #include <linux/firmware.h>
23 #include <linux/list.h>
24 #include <linux/u64_stats_sync.h>
25 
26 #include "slic.h"
27 
28 #define DRV_NAME			"slicoss"
29 
30 static const struct pci_device_id slic_id_tbl[] = {
31 	{ PCI_DEVICE(PCI_VENDOR_ID_ALACRITECH,
32 		     PCI_DEVICE_ID_ALACRITECH_MOJAVE) },
33 	{ PCI_DEVICE(PCI_VENDOR_ID_ALACRITECH,
34 		     PCI_DEVICE_ID_ALACRITECH_OASIS) },
35 	{ 0 }
36 };
37 
38 static const char slic_stats_strings[][ETH_GSTRING_LEN] = {
39 	"rx_packets",
40 	"rx_bytes",
41 	"rx_multicasts",
42 	"rx_errors",
43 	"rx_buff_miss",
44 	"rx_tp_csum",
45 	"rx_tp_oflow",
46 	"rx_tp_hlen",
47 	"rx_ip_csum",
48 	"rx_ip_len",
49 	"rx_ip_hdr_len",
50 	"rx_early",
51 	"rx_buff_oflow",
52 	"rx_lcode",
53 	"rx_drbl",
54 	"rx_crc",
55 	"rx_oflow_802",
56 	"rx_uflow_802",
57 	"tx_packets",
58 	"tx_bytes",
59 	"tx_carrier",
60 	"tx_dropped",
61 	"irq_errs",
62 };
63 
slic_next_queue_idx(unsigned int idx,unsigned int qlen)64 static inline int slic_next_queue_idx(unsigned int idx, unsigned int qlen)
65 {
66 	return (idx + 1) & (qlen - 1);
67 }
68 
slic_get_free_queue_descs(unsigned int put_idx,unsigned int done_idx,unsigned int qlen)69 static inline int slic_get_free_queue_descs(unsigned int put_idx,
70 					    unsigned int done_idx,
71 					    unsigned int qlen)
72 {
73 	if (put_idx >= done_idx)
74 		return (qlen - (put_idx - done_idx) - 1);
75 	return (done_idx - put_idx - 1);
76 }
77 
slic_next_compl_idx(struct slic_device * sdev)78 static unsigned int slic_next_compl_idx(struct slic_device *sdev)
79 {
80 	struct slic_stat_queue *stq = &sdev->stq;
81 	unsigned int active = stq->active_array;
82 	struct slic_stat_desc *descs;
83 	struct slic_stat_desc *stat;
84 	unsigned int idx;
85 
86 	descs = stq->descs[active];
87 	stat = &descs[stq->done_idx];
88 
89 	if (!stat->status)
90 		return SLIC_INVALID_STAT_DESC_IDX;
91 
92 	idx = (le32_to_cpu(stat->hnd) & 0xffff) - 1;
93 	/* reset desc */
94 	stat->hnd = 0;
95 	stat->status = 0;
96 
97 	stq->done_idx = slic_next_queue_idx(stq->done_idx, stq->len);
98 	/* check for wraparound */
99 	if (!stq->done_idx) {
100 		dma_addr_t paddr = stq->paddr[active];
101 
102 		slic_write(sdev, SLIC_REG_RBAR, lower_32_bits(paddr) |
103 						stq->len);
104 		/* make sure new status descriptors are immediately available */
105 		slic_flush_write(sdev);
106 		active++;
107 		active &= (SLIC_NUM_STAT_DESC_ARRAYS - 1);
108 		stq->active_array = active;
109 	}
110 	return idx;
111 }
112 
slic_get_free_tx_descs(struct slic_tx_queue * txq)113 static unsigned int slic_get_free_tx_descs(struct slic_tx_queue *txq)
114 {
115 	/* ensure tail idx is updated */
116 	smp_mb();
117 	return slic_get_free_queue_descs(txq->put_idx, txq->done_idx, txq->len);
118 }
119 
slic_get_free_rx_descs(struct slic_rx_queue * rxq)120 static unsigned int slic_get_free_rx_descs(struct slic_rx_queue *rxq)
121 {
122 	return slic_get_free_queue_descs(rxq->put_idx, rxq->done_idx, rxq->len);
123 }
124 
slic_clear_upr_list(struct slic_upr_list * upr_list)125 static void slic_clear_upr_list(struct slic_upr_list *upr_list)
126 {
127 	struct slic_upr *upr;
128 	struct slic_upr *tmp;
129 
130 	spin_lock_bh(&upr_list->lock);
131 	list_for_each_entry_safe(upr, tmp, &upr_list->list, list) {
132 		list_del(&upr->list);
133 		kfree(upr);
134 	}
135 	upr_list->pending = false;
136 	spin_unlock_bh(&upr_list->lock);
137 }
138 
slic_start_upr(struct slic_device * sdev,struct slic_upr * upr)139 static void slic_start_upr(struct slic_device *sdev, struct slic_upr *upr)
140 {
141 	u32 reg;
142 
143 	reg = (upr->type == SLIC_UPR_CONFIG) ? SLIC_REG_RCONFIG :
144 					       SLIC_REG_LSTAT;
145 	slic_write(sdev, reg, lower_32_bits(upr->paddr));
146 	slic_flush_write(sdev);
147 }
148 
slic_queue_upr(struct slic_device * sdev,struct slic_upr * upr)149 static void slic_queue_upr(struct slic_device *sdev, struct slic_upr *upr)
150 {
151 	struct slic_upr_list *upr_list = &sdev->upr_list;
152 	bool pending;
153 
154 	spin_lock_bh(&upr_list->lock);
155 	pending = upr_list->pending;
156 	INIT_LIST_HEAD(&upr->list);
157 	list_add_tail(&upr->list, &upr_list->list);
158 	upr_list->pending = true;
159 	spin_unlock_bh(&upr_list->lock);
160 
161 	if (!pending)
162 		slic_start_upr(sdev, upr);
163 }
164 
slic_dequeue_upr(struct slic_device * sdev)165 static struct slic_upr *slic_dequeue_upr(struct slic_device *sdev)
166 {
167 	struct slic_upr_list *upr_list = &sdev->upr_list;
168 	struct slic_upr *next_upr = NULL;
169 	struct slic_upr *upr = NULL;
170 
171 	spin_lock_bh(&upr_list->lock);
172 	if (!list_empty(&upr_list->list)) {
173 		upr = list_first_entry(&upr_list->list, struct slic_upr, list);
174 		list_del(&upr->list);
175 
176 		if (list_empty(&upr_list->list))
177 			upr_list->pending = false;
178 		else
179 			next_upr = list_first_entry(&upr_list->list,
180 						    struct slic_upr, list);
181 	}
182 	spin_unlock_bh(&upr_list->lock);
183 	/* trigger processing of the next upr in list */
184 	if (next_upr)
185 		slic_start_upr(sdev, next_upr);
186 
187 	return upr;
188 }
189 
slic_new_upr(struct slic_device * sdev,unsigned int type,dma_addr_t paddr)190 static int slic_new_upr(struct slic_device *sdev, unsigned int type,
191 			dma_addr_t paddr)
192 {
193 	struct slic_upr *upr;
194 
195 	upr = kmalloc(sizeof(*upr), GFP_ATOMIC);
196 	if (!upr)
197 		return -ENOMEM;
198 	upr->type = type;
199 	upr->paddr = paddr;
200 
201 	slic_queue_upr(sdev, upr);
202 
203 	return 0;
204 }
205 
slic_set_mcast_bit(u64 * mcmask,unsigned char const * addr)206 static void slic_set_mcast_bit(u64 *mcmask, unsigned char const *addr)
207 {
208 	u64 mask = *mcmask;
209 	u8 crc;
210 	/* Get the CRC polynomial for the mac address: we use bits 1-8 (lsb),
211 	 * bitwise reversed, msb (= lsb bit 0 before bitrev) is automatically
212 	 * discarded.
213 	 */
214 	crc = ether_crc(ETH_ALEN, addr) >> 23;
215 	 /* we only have space on the SLIC for 64 entries */
216 	crc &= 0x3F;
217 	mask |= (u64)1 << crc;
218 	*mcmask = mask;
219 }
220 
221 /* must be called with link_lock held */
slic_configure_rcv(struct slic_device * sdev)222 static void slic_configure_rcv(struct slic_device *sdev)
223 {
224 	u32 val;
225 
226 	val = SLIC_GRCR_RESET | SLIC_GRCR_ADDRAEN | SLIC_GRCR_RCVEN |
227 	      SLIC_GRCR_HASHSIZE << SLIC_GRCR_HASHSIZE_SHIFT | SLIC_GRCR_RCVBAD;
228 
229 	if (sdev->duplex == DUPLEX_FULL)
230 		val |= SLIC_GRCR_CTLEN;
231 
232 	if (sdev->promisc)
233 		val |= SLIC_GRCR_RCVALL;
234 
235 	slic_write(sdev, SLIC_REG_WRCFG, val);
236 }
237 
238 /* must be called with link_lock held */
slic_configure_xmt(struct slic_device * sdev)239 static void slic_configure_xmt(struct slic_device *sdev)
240 {
241 	u32 val;
242 
243 	val = SLIC_GXCR_RESET | SLIC_GXCR_XMTEN;
244 
245 	if (sdev->duplex == DUPLEX_FULL)
246 		val |= SLIC_GXCR_PAUSEEN;
247 
248 	slic_write(sdev, SLIC_REG_WXCFG, val);
249 }
250 
251 /* must be called with link_lock held */
slic_configure_mac(struct slic_device * sdev)252 static void slic_configure_mac(struct slic_device *sdev)
253 {
254 	u32 val;
255 
256 	if (sdev->speed == SPEED_1000) {
257 		val = SLIC_GMCR_GAPBB_1000 << SLIC_GMCR_GAPBB_SHIFT |
258 		      SLIC_GMCR_GAPR1_1000 << SLIC_GMCR_GAPR1_SHIFT |
259 		      SLIC_GMCR_GAPR2_1000 << SLIC_GMCR_GAPR2_SHIFT |
260 		      SLIC_GMCR_GBIT; /* enable GMII */
261 	} else {
262 		val = SLIC_GMCR_GAPBB_100 << SLIC_GMCR_GAPBB_SHIFT |
263 		      SLIC_GMCR_GAPR1_100 << SLIC_GMCR_GAPR1_SHIFT |
264 		      SLIC_GMCR_GAPR2_100 << SLIC_GMCR_GAPR2_SHIFT;
265 	}
266 
267 	if (sdev->duplex == DUPLEX_FULL)
268 		val |= SLIC_GMCR_FULLD;
269 
270 	slic_write(sdev, SLIC_REG_WMCFG, val);
271 }
272 
slic_configure_link_locked(struct slic_device * sdev,int speed,unsigned int duplex)273 static void slic_configure_link_locked(struct slic_device *sdev, int speed,
274 				       unsigned int duplex)
275 {
276 	struct net_device *dev = sdev->netdev;
277 
278 	if (sdev->speed == speed && sdev->duplex == duplex)
279 		return;
280 
281 	sdev->speed = speed;
282 	sdev->duplex = duplex;
283 
284 	if (sdev->speed == SPEED_UNKNOWN) {
285 		if (netif_carrier_ok(dev))
286 			netif_carrier_off(dev);
287 	} else {
288 		/* (re)configure link settings */
289 		slic_configure_mac(sdev);
290 		slic_configure_xmt(sdev);
291 		slic_configure_rcv(sdev);
292 		slic_flush_write(sdev);
293 
294 		if (!netif_carrier_ok(dev))
295 			netif_carrier_on(dev);
296 	}
297 }
298 
slic_configure_link(struct slic_device * sdev,int speed,unsigned int duplex)299 static void slic_configure_link(struct slic_device *sdev, int speed,
300 				unsigned int duplex)
301 {
302 	spin_lock_bh(&sdev->link_lock);
303 	slic_configure_link_locked(sdev, speed, duplex);
304 	spin_unlock_bh(&sdev->link_lock);
305 }
306 
slic_set_rx_mode(struct net_device * dev)307 static void slic_set_rx_mode(struct net_device *dev)
308 {
309 	struct slic_device *sdev = netdev_priv(dev);
310 	struct netdev_hw_addr *hwaddr;
311 	bool set_promisc;
312 	u64 mcmask;
313 
314 	if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
315 		/* Turn on all multicast addresses. We have to do this for
316 		 * promiscuous mode as well as ALLMCAST mode (it saves the
317 		 * microcode from having to keep state about the MAC
318 		 * configuration).
319 		 */
320 		mcmask = ~(u64)0;
321 	} else  {
322 		mcmask = 0;
323 
324 		netdev_for_each_mc_addr(hwaddr, dev) {
325 			slic_set_mcast_bit(&mcmask, hwaddr->addr);
326 		}
327 	}
328 
329 	slic_write(sdev, SLIC_REG_MCASTLOW, lower_32_bits(mcmask));
330 	slic_write(sdev, SLIC_REG_MCASTHIGH, upper_32_bits(mcmask));
331 
332 	set_promisc = !!(dev->flags & IFF_PROMISC);
333 
334 	spin_lock_bh(&sdev->link_lock);
335 	if (sdev->promisc != set_promisc) {
336 		sdev->promisc = set_promisc;
337 		slic_configure_rcv(sdev);
338 	}
339 	spin_unlock_bh(&sdev->link_lock);
340 }
341 
slic_xmit_complete(struct slic_device * sdev)342 static void slic_xmit_complete(struct slic_device *sdev)
343 {
344 	struct slic_tx_queue *txq = &sdev->txq;
345 	struct net_device *dev = sdev->netdev;
346 	struct slic_tx_buffer *buff;
347 	unsigned int frames = 0;
348 	unsigned int bytes = 0;
349 	unsigned int idx;
350 
351 	/* Limit processing to SLIC_MAX_TX_COMPLETIONS frames to avoid that new
352 	 * completions during processing keeps the loop running endlessly.
353 	 */
354 	do {
355 		idx = slic_next_compl_idx(sdev);
356 		if (idx == SLIC_INVALID_STAT_DESC_IDX)
357 			break;
358 
359 		txq->done_idx = idx;
360 		buff = &txq->txbuffs[idx];
361 
362 		if (unlikely(!buff->skb)) {
363 			netdev_warn(dev,
364 				    "no skb found for desc idx %i\n", idx);
365 			continue;
366 		}
367 		dma_unmap_single(&sdev->pdev->dev,
368 				 dma_unmap_addr(buff, map_addr),
369 				 dma_unmap_len(buff, map_len), DMA_TO_DEVICE);
370 
371 		bytes += buff->skb->len;
372 		frames++;
373 
374 		dev_kfree_skb_any(buff->skb);
375 		buff->skb = NULL;
376 	} while (frames < SLIC_MAX_TX_COMPLETIONS);
377 	/* make sure xmit sees the new value for done_idx */
378 	smp_wmb();
379 
380 	u64_stats_update_begin(&sdev->stats.syncp);
381 	sdev->stats.tx_bytes += bytes;
382 	sdev->stats.tx_packets += frames;
383 	u64_stats_update_end(&sdev->stats.syncp);
384 
385 	netif_tx_lock(dev);
386 	if (netif_queue_stopped(dev) &&
387 	    (slic_get_free_tx_descs(txq) >= SLIC_MIN_TX_WAKEUP_DESCS))
388 		netif_wake_queue(dev);
389 	netif_tx_unlock(dev);
390 }
391 
slic_refill_rx_queue(struct slic_device * sdev,gfp_t gfp)392 static void slic_refill_rx_queue(struct slic_device *sdev, gfp_t gfp)
393 {
394 	const unsigned int ALIGN_MASK = SLIC_RX_BUFF_ALIGN - 1;
395 	unsigned int maplen = SLIC_RX_BUFF_SIZE;
396 	struct slic_rx_queue *rxq = &sdev->rxq;
397 	struct net_device *dev = sdev->netdev;
398 	struct slic_rx_buffer *buff;
399 	struct slic_rx_desc *desc;
400 	unsigned int misalign;
401 	unsigned int offset;
402 	struct sk_buff *skb;
403 	dma_addr_t paddr;
404 
405 	while (slic_get_free_rx_descs(rxq) > SLIC_MAX_REQ_RX_DESCS) {
406 		skb = alloc_skb(maplen + ALIGN_MASK, gfp);
407 		if (!skb)
408 			break;
409 
410 		paddr = dma_map_single(&sdev->pdev->dev, skb->data, maplen,
411 				       DMA_FROM_DEVICE);
412 		if (dma_mapping_error(&sdev->pdev->dev, paddr)) {
413 			netdev_err(dev, "mapping rx packet failed\n");
414 			/* drop skb */
415 			dev_kfree_skb_any(skb);
416 			break;
417 		}
418 		/* ensure head buffer descriptors are 256 byte aligned */
419 		offset = 0;
420 		misalign = paddr & ALIGN_MASK;
421 		if (misalign) {
422 			offset = SLIC_RX_BUFF_ALIGN - misalign;
423 			skb_reserve(skb, offset);
424 		}
425 		/* the HW expects dma chunks for descriptor + frame data */
426 		desc = (struct slic_rx_desc *)skb->data;
427 		/* temporarily sync descriptor for CPU to clear status */
428 		dma_sync_single_for_cpu(&sdev->pdev->dev, paddr,
429 					offset + sizeof(*desc),
430 					DMA_FROM_DEVICE);
431 		desc->status = 0;
432 		/* return it to HW again */
433 		dma_sync_single_for_device(&sdev->pdev->dev, paddr,
434 					   offset + sizeof(*desc),
435 					   DMA_FROM_DEVICE);
436 
437 		buff = &rxq->rxbuffs[rxq->put_idx];
438 		buff->skb = skb;
439 		dma_unmap_addr_set(buff, map_addr, paddr);
440 		dma_unmap_len_set(buff, map_len, maplen);
441 		buff->addr_offset = offset;
442 		/* complete write to descriptor before it is handed to HW */
443 		wmb();
444 		/* head buffer descriptors are placed immediately before skb */
445 		slic_write(sdev, SLIC_REG_HBAR, lower_32_bits(paddr) + offset);
446 		rxq->put_idx = slic_next_queue_idx(rxq->put_idx, rxq->len);
447 	}
448 }
449 
slic_handle_frame_error(struct slic_device * sdev,struct sk_buff * skb)450 static void slic_handle_frame_error(struct slic_device *sdev,
451 				    struct sk_buff *skb)
452 {
453 	struct slic_stats *stats = &sdev->stats;
454 
455 	if (sdev->model == SLIC_MODEL_OASIS) {
456 		struct slic_rx_info_oasis *info;
457 		u32 status_b;
458 		u32 status;
459 
460 		info = (struct slic_rx_info_oasis *)skb->data;
461 		status = le32_to_cpu(info->frame_status);
462 		status_b = le32_to_cpu(info->frame_status_b);
463 		/* transport layer */
464 		if (status_b & SLIC_VRHSTATB_TPCSUM)
465 			SLIC_INC_STATS_COUNTER(stats, rx_tpcsum);
466 		if (status & SLIC_VRHSTAT_TPOFLO)
467 			SLIC_INC_STATS_COUNTER(stats, rx_tpoflow);
468 		if (status_b & SLIC_VRHSTATB_TPHLEN)
469 			SLIC_INC_STATS_COUNTER(stats, rx_tphlen);
470 		/* ip layer */
471 		if (status_b & SLIC_VRHSTATB_IPCSUM)
472 			SLIC_INC_STATS_COUNTER(stats, rx_ipcsum);
473 		if (status_b & SLIC_VRHSTATB_IPLERR)
474 			SLIC_INC_STATS_COUNTER(stats, rx_iplen);
475 		if (status_b & SLIC_VRHSTATB_IPHERR)
476 			SLIC_INC_STATS_COUNTER(stats, rx_iphlen);
477 		/* link layer */
478 		if (status_b & SLIC_VRHSTATB_RCVE)
479 			SLIC_INC_STATS_COUNTER(stats, rx_early);
480 		if (status_b & SLIC_VRHSTATB_BUFF)
481 			SLIC_INC_STATS_COUNTER(stats, rx_buffoflow);
482 		if (status_b & SLIC_VRHSTATB_CODE)
483 			SLIC_INC_STATS_COUNTER(stats, rx_lcode);
484 		if (status_b & SLIC_VRHSTATB_DRBL)
485 			SLIC_INC_STATS_COUNTER(stats, rx_drbl);
486 		if (status_b & SLIC_VRHSTATB_CRC)
487 			SLIC_INC_STATS_COUNTER(stats, rx_crc);
488 		if (status & SLIC_VRHSTAT_802OE)
489 			SLIC_INC_STATS_COUNTER(stats, rx_oflow802);
490 		if (status_b & SLIC_VRHSTATB_802UE)
491 			SLIC_INC_STATS_COUNTER(stats, rx_uflow802);
492 		if (status_b & SLIC_VRHSTATB_CARRE)
493 			SLIC_INC_STATS_COUNTER(stats, tx_carrier);
494 	} else { /* mojave */
495 		struct slic_rx_info_mojave *info;
496 		u32 status;
497 
498 		info = (struct slic_rx_info_mojave *)skb->data;
499 		status = le32_to_cpu(info->frame_status);
500 		/* transport layer */
501 		if (status & SLIC_VGBSTAT_XPERR) {
502 			u32 xerr = status >> SLIC_VGBSTAT_XERRSHFT;
503 
504 			if (xerr == SLIC_VGBSTAT_XCSERR)
505 				SLIC_INC_STATS_COUNTER(stats, rx_tpcsum);
506 			if (xerr == SLIC_VGBSTAT_XUFLOW)
507 				SLIC_INC_STATS_COUNTER(stats, rx_tpoflow);
508 			if (xerr == SLIC_VGBSTAT_XHLEN)
509 				SLIC_INC_STATS_COUNTER(stats, rx_tphlen);
510 		}
511 		/* ip layer */
512 		if (status & SLIC_VGBSTAT_NETERR) {
513 			u32 nerr = status >> SLIC_VGBSTAT_NERRSHFT &
514 				   SLIC_VGBSTAT_NERRMSK;
515 
516 			if (nerr == SLIC_VGBSTAT_NCSERR)
517 				SLIC_INC_STATS_COUNTER(stats, rx_ipcsum);
518 			if (nerr == SLIC_VGBSTAT_NUFLOW)
519 				SLIC_INC_STATS_COUNTER(stats, rx_iplen);
520 			if (nerr == SLIC_VGBSTAT_NHLEN)
521 				SLIC_INC_STATS_COUNTER(stats, rx_iphlen);
522 		}
523 		/* link layer */
524 		if (status & SLIC_VGBSTAT_LNKERR) {
525 			u32 lerr = status & SLIC_VGBSTAT_LERRMSK;
526 
527 			if (lerr == SLIC_VGBSTAT_LDEARLY)
528 				SLIC_INC_STATS_COUNTER(stats, rx_early);
529 			if (lerr == SLIC_VGBSTAT_LBOFLO)
530 				SLIC_INC_STATS_COUNTER(stats, rx_buffoflow);
531 			if (lerr == SLIC_VGBSTAT_LCODERR)
532 				SLIC_INC_STATS_COUNTER(stats, rx_lcode);
533 			if (lerr == SLIC_VGBSTAT_LDBLNBL)
534 				SLIC_INC_STATS_COUNTER(stats, rx_drbl);
535 			if (lerr == SLIC_VGBSTAT_LCRCERR)
536 				SLIC_INC_STATS_COUNTER(stats, rx_crc);
537 			if (lerr == SLIC_VGBSTAT_LOFLO)
538 				SLIC_INC_STATS_COUNTER(stats, rx_oflow802);
539 			if (lerr == SLIC_VGBSTAT_LUFLO)
540 				SLIC_INC_STATS_COUNTER(stats, rx_uflow802);
541 		}
542 	}
543 	SLIC_INC_STATS_COUNTER(stats, rx_errors);
544 }
545 
slic_handle_receive(struct slic_device * sdev,unsigned int todo,unsigned int * done)546 static void slic_handle_receive(struct slic_device *sdev, unsigned int todo,
547 				unsigned int *done)
548 {
549 	struct slic_rx_queue *rxq = &sdev->rxq;
550 	struct net_device *dev = sdev->netdev;
551 	struct slic_rx_buffer *buff;
552 	struct slic_rx_desc *desc;
553 	unsigned int frames = 0;
554 	unsigned int bytes = 0;
555 	struct sk_buff *skb;
556 	u32 status;
557 	u32 len;
558 
559 	while (todo && (rxq->done_idx != rxq->put_idx)) {
560 		buff = &rxq->rxbuffs[rxq->done_idx];
561 
562 		skb = buff->skb;
563 		if (!skb)
564 			break;
565 
566 		desc = (struct slic_rx_desc *)skb->data;
567 
568 		dma_sync_single_for_cpu(&sdev->pdev->dev,
569 					dma_unmap_addr(buff, map_addr),
570 					buff->addr_offset + sizeof(*desc),
571 					DMA_FROM_DEVICE);
572 
573 		status = le32_to_cpu(desc->status);
574 		if (!(status & SLIC_IRHDDR_SVALID)) {
575 			dma_sync_single_for_device(&sdev->pdev->dev,
576 						   dma_unmap_addr(buff,
577 								  map_addr),
578 						   buff->addr_offset +
579 						   sizeof(*desc),
580 						   DMA_FROM_DEVICE);
581 			break;
582 		}
583 
584 		buff->skb = NULL;
585 
586 		dma_unmap_single(&sdev->pdev->dev,
587 				 dma_unmap_addr(buff, map_addr),
588 				 dma_unmap_len(buff, map_len),
589 				 DMA_FROM_DEVICE);
590 
591 		/* skip rx descriptor that is placed before the frame data */
592 		skb_reserve(skb, SLIC_RX_BUFF_HDR_SIZE);
593 
594 		if (unlikely(status & SLIC_IRHDDR_ERR)) {
595 			slic_handle_frame_error(sdev, skb);
596 			dev_kfree_skb_any(skb);
597 		} else {
598 			struct ethhdr *eh = (struct ethhdr *)skb->data;
599 
600 			if (is_multicast_ether_addr(eh->h_dest))
601 				SLIC_INC_STATS_COUNTER(&sdev->stats, rx_mcasts);
602 
603 			len = le32_to_cpu(desc->length) & SLIC_IRHDDR_FLEN_MSK;
604 			skb_put(skb, len);
605 			skb->protocol = eth_type_trans(skb, dev);
606 			skb->ip_summed = CHECKSUM_UNNECESSARY;
607 
608 			napi_gro_receive(&sdev->napi, skb);
609 
610 			bytes += len;
611 			frames++;
612 		}
613 		rxq->done_idx = slic_next_queue_idx(rxq->done_idx, rxq->len);
614 		todo--;
615 	}
616 
617 	u64_stats_update_begin(&sdev->stats.syncp);
618 	sdev->stats.rx_bytes += bytes;
619 	sdev->stats.rx_packets += frames;
620 	u64_stats_update_end(&sdev->stats.syncp);
621 
622 	slic_refill_rx_queue(sdev, GFP_ATOMIC);
623 }
624 
slic_handle_link_irq(struct slic_device * sdev)625 static void slic_handle_link_irq(struct slic_device *sdev)
626 {
627 	struct slic_shmem *sm = &sdev->shmem;
628 	struct slic_shmem_data *sm_data = sm->shmem_data;
629 	unsigned int duplex;
630 	int speed;
631 	u32 link;
632 
633 	link = le32_to_cpu(sm_data->link);
634 
635 	if (link & SLIC_GIG_LINKUP) {
636 		if (link & SLIC_GIG_SPEED_1000)
637 			speed = SPEED_1000;
638 		else if (link & SLIC_GIG_SPEED_100)
639 			speed = SPEED_100;
640 		else
641 			speed = SPEED_10;
642 
643 		duplex = (link & SLIC_GIG_FULLDUPLEX) ? DUPLEX_FULL :
644 							DUPLEX_HALF;
645 	} else {
646 		duplex = DUPLEX_UNKNOWN;
647 		speed = SPEED_UNKNOWN;
648 	}
649 	slic_configure_link(sdev, speed, duplex);
650 }
651 
slic_handle_upr_irq(struct slic_device * sdev,u32 irqs)652 static void slic_handle_upr_irq(struct slic_device *sdev, u32 irqs)
653 {
654 	struct slic_upr *upr;
655 
656 	/* remove upr that caused this irq (always the first entry in list) */
657 	upr = slic_dequeue_upr(sdev);
658 	if (!upr) {
659 		netdev_warn(sdev->netdev, "no upr found on list\n");
660 		return;
661 	}
662 
663 	if (upr->type == SLIC_UPR_LSTAT) {
664 		if (unlikely(irqs & SLIC_ISR_UPCERR_MASK)) {
665 			/* try again */
666 			slic_queue_upr(sdev, upr);
667 			return;
668 		}
669 		slic_handle_link_irq(sdev);
670 	}
671 	kfree(upr);
672 }
673 
slic_handle_link_change(struct slic_device * sdev)674 static int slic_handle_link_change(struct slic_device *sdev)
675 {
676 	return slic_new_upr(sdev, SLIC_UPR_LSTAT, sdev->shmem.link_paddr);
677 }
678 
slic_handle_err_irq(struct slic_device * sdev,u32 isr)679 static void slic_handle_err_irq(struct slic_device *sdev, u32 isr)
680 {
681 	struct slic_stats *stats = &sdev->stats;
682 
683 	if (isr & SLIC_ISR_RMISS)
684 		SLIC_INC_STATS_COUNTER(stats, rx_buff_miss);
685 	if (isr & SLIC_ISR_XDROP)
686 		SLIC_INC_STATS_COUNTER(stats, tx_dropped);
687 	if (!(isr & (SLIC_ISR_RMISS | SLIC_ISR_XDROP)))
688 		SLIC_INC_STATS_COUNTER(stats, irq_errs);
689 }
690 
slic_handle_irq(struct slic_device * sdev,u32 isr,unsigned int todo,unsigned int * done)691 static void slic_handle_irq(struct slic_device *sdev, u32 isr,
692 			    unsigned int todo, unsigned int *done)
693 {
694 	if (isr & SLIC_ISR_ERR)
695 		slic_handle_err_irq(sdev, isr);
696 
697 	if (isr & SLIC_ISR_LEVENT)
698 		slic_handle_link_change(sdev);
699 
700 	if (isr & SLIC_ISR_UPC_MASK)
701 		slic_handle_upr_irq(sdev, isr);
702 
703 	if (isr & SLIC_ISR_RCV)
704 		slic_handle_receive(sdev, todo, done);
705 
706 	if (isr & SLIC_ISR_CMD)
707 		slic_xmit_complete(sdev);
708 }
709 
slic_poll(struct napi_struct * napi,int todo)710 static int slic_poll(struct napi_struct *napi, int todo)
711 {
712 	struct slic_device *sdev = container_of(napi, struct slic_device, napi);
713 	struct slic_shmem *sm = &sdev->shmem;
714 	struct slic_shmem_data *sm_data = sm->shmem_data;
715 	u32 isr = le32_to_cpu(sm_data->isr);
716 	int done = 0;
717 
718 	slic_handle_irq(sdev, isr, todo, &done);
719 
720 	if (done < todo) {
721 		napi_complete_done(napi, done);
722 		/* reenable irqs */
723 		sm_data->isr = 0;
724 		/* make sure sm_data->isr is cleard before irqs are reenabled */
725 		wmb();
726 		slic_write(sdev, SLIC_REG_ISR, 0);
727 		slic_flush_write(sdev);
728 	}
729 
730 	return done;
731 }
732 
slic_irq(int irq,void * dev_id)733 static irqreturn_t slic_irq(int irq, void *dev_id)
734 {
735 	struct slic_device *sdev = dev_id;
736 	struct slic_shmem *sm = &sdev->shmem;
737 	struct slic_shmem_data *sm_data = sm->shmem_data;
738 
739 	slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_MASK);
740 	slic_flush_write(sdev);
741 	/* make sure sm_data->isr is read after ICR_INT_MASK is set */
742 	wmb();
743 
744 	if (!sm_data->isr) {
745 		dma_rmb();
746 		/* spurious interrupt */
747 		slic_write(sdev, SLIC_REG_ISR, 0);
748 		slic_flush_write(sdev);
749 		return IRQ_NONE;
750 	}
751 
752 	napi_schedule_irqoff(&sdev->napi);
753 
754 	return IRQ_HANDLED;
755 }
756 
slic_card_reset(struct slic_device * sdev)757 static void slic_card_reset(struct slic_device *sdev)
758 {
759 	u16 cmd;
760 
761 	slic_write(sdev, SLIC_REG_RESET, SLIC_RESET_MAGIC);
762 	/* flush write by means of config space */
763 	pci_read_config_word(sdev->pdev, PCI_COMMAND, &cmd);
764 	mdelay(1);
765 }
766 
slic_init_stat_queue(struct slic_device * sdev)767 static int slic_init_stat_queue(struct slic_device *sdev)
768 {
769 	const unsigned int DESC_ALIGN_MASK = SLIC_STATS_DESC_ALIGN - 1;
770 	struct slic_stat_queue *stq = &sdev->stq;
771 	struct slic_stat_desc *descs;
772 	unsigned int misalign;
773 	unsigned int offset;
774 	dma_addr_t paddr;
775 	size_t size;
776 	int err;
777 	int i;
778 
779 	stq->len = SLIC_NUM_STAT_DESCS;
780 	stq->active_array = 0;
781 	stq->done_idx = 0;
782 
783 	size = stq->len * sizeof(*descs) + DESC_ALIGN_MASK;
784 
785 	for (i = 0; i < SLIC_NUM_STAT_DESC_ARRAYS; i++) {
786 		descs = dma_alloc_coherent(&sdev->pdev->dev, size, &paddr,
787 					   GFP_KERNEL);
788 		if (!descs) {
789 			netdev_err(sdev->netdev,
790 				   "failed to allocate status descriptors\n");
791 			err = -ENOMEM;
792 			goto free_descs;
793 		}
794 		/* ensure correct alignment */
795 		offset = 0;
796 		misalign = paddr & DESC_ALIGN_MASK;
797 		if (misalign) {
798 			offset = SLIC_STATS_DESC_ALIGN - misalign;
799 			descs += offset;
800 			paddr += offset;
801 		}
802 
803 		slic_write(sdev, SLIC_REG_RBAR, lower_32_bits(paddr) |
804 						stq->len);
805 		stq->descs[i] = descs;
806 		stq->paddr[i] = paddr;
807 		stq->addr_offset[i] = offset;
808 	}
809 
810 	stq->mem_size = size;
811 
812 	return 0;
813 
814 free_descs:
815 	while (i--) {
816 		dma_free_coherent(&sdev->pdev->dev, stq->mem_size,
817 				  stq->descs[i] - stq->addr_offset[i],
818 				  stq->paddr[i] - stq->addr_offset[i]);
819 	}
820 
821 	return err;
822 }
823 
slic_free_stat_queue(struct slic_device * sdev)824 static void slic_free_stat_queue(struct slic_device *sdev)
825 {
826 	struct slic_stat_queue *stq = &sdev->stq;
827 	int i;
828 
829 	for (i = 0; i < SLIC_NUM_STAT_DESC_ARRAYS; i++) {
830 		dma_free_coherent(&sdev->pdev->dev, stq->mem_size,
831 				  stq->descs[i] - stq->addr_offset[i],
832 				  stq->paddr[i] - stq->addr_offset[i]);
833 	}
834 }
835 
slic_init_tx_queue(struct slic_device * sdev)836 static int slic_init_tx_queue(struct slic_device *sdev)
837 {
838 	struct slic_tx_queue *txq = &sdev->txq;
839 	struct slic_tx_buffer *buff;
840 	struct slic_tx_desc *desc;
841 	unsigned int i;
842 	int err;
843 
844 	txq->len = SLIC_NUM_TX_DESCS;
845 	txq->put_idx = 0;
846 	txq->done_idx = 0;
847 
848 	txq->txbuffs = kcalloc(txq->len, sizeof(*buff), GFP_KERNEL);
849 	if (!txq->txbuffs)
850 		return -ENOMEM;
851 
852 	txq->dma_pool = dma_pool_create("slic_pool", &sdev->pdev->dev,
853 					sizeof(*desc), SLIC_TX_DESC_ALIGN,
854 					4096);
855 	if (!txq->dma_pool) {
856 		err = -ENOMEM;
857 		netdev_err(sdev->netdev, "failed to create dma pool\n");
858 		goto free_buffs;
859 	}
860 
861 	for (i = 0; i < txq->len; i++) {
862 		buff = &txq->txbuffs[i];
863 		desc = dma_pool_zalloc(txq->dma_pool, GFP_KERNEL,
864 				       &buff->desc_paddr);
865 		if (!desc) {
866 			netdev_err(sdev->netdev,
867 				   "failed to alloc pool chunk (%i)\n", i);
868 			err = -ENOMEM;
869 			goto free_descs;
870 		}
871 
872 		desc->hnd = cpu_to_le32((u32)(i + 1));
873 		desc->cmd = SLIC_CMD_XMT_REQ;
874 		desc->flags = 0;
875 		desc->type = cpu_to_le32(SLIC_CMD_TYPE_DUMB);
876 		buff->desc = desc;
877 	}
878 
879 	return 0;
880 
881 free_descs:
882 	while (i--) {
883 		buff = &txq->txbuffs[i];
884 		dma_pool_free(txq->dma_pool, buff->desc, buff->desc_paddr);
885 	}
886 	dma_pool_destroy(txq->dma_pool);
887 
888 free_buffs:
889 	kfree(txq->txbuffs);
890 
891 	return err;
892 }
893 
slic_free_tx_queue(struct slic_device * sdev)894 static void slic_free_tx_queue(struct slic_device *sdev)
895 {
896 	struct slic_tx_queue *txq = &sdev->txq;
897 	struct slic_tx_buffer *buff;
898 	unsigned int i;
899 
900 	for (i = 0; i < txq->len; i++) {
901 		buff = &txq->txbuffs[i];
902 		dma_pool_free(txq->dma_pool, buff->desc, buff->desc_paddr);
903 		if (!buff->skb)
904 			continue;
905 
906 		dma_unmap_single(&sdev->pdev->dev,
907 				 dma_unmap_addr(buff, map_addr),
908 				 dma_unmap_len(buff, map_len), DMA_TO_DEVICE);
909 		consume_skb(buff->skb);
910 	}
911 	dma_pool_destroy(txq->dma_pool);
912 
913 	kfree(txq->txbuffs);
914 }
915 
slic_init_rx_queue(struct slic_device * sdev)916 static int slic_init_rx_queue(struct slic_device *sdev)
917 {
918 	struct slic_rx_queue *rxq = &sdev->rxq;
919 	struct slic_rx_buffer *buff;
920 
921 	rxq->len = SLIC_NUM_RX_LES;
922 	rxq->done_idx = 0;
923 	rxq->put_idx = 0;
924 
925 	buff = kcalloc(rxq->len, sizeof(*buff), GFP_KERNEL);
926 	if (!buff)
927 		return -ENOMEM;
928 
929 	rxq->rxbuffs = buff;
930 	slic_refill_rx_queue(sdev, GFP_KERNEL);
931 
932 	return 0;
933 }
934 
slic_free_rx_queue(struct slic_device * sdev)935 static void slic_free_rx_queue(struct slic_device *sdev)
936 {
937 	struct slic_rx_queue *rxq = &sdev->rxq;
938 	struct slic_rx_buffer *buff;
939 	unsigned int i;
940 
941 	/* free rx buffers */
942 	for (i = 0; i < rxq->len; i++) {
943 		buff = &rxq->rxbuffs[i];
944 
945 		if (!buff->skb)
946 			continue;
947 
948 		dma_unmap_single(&sdev->pdev->dev,
949 				 dma_unmap_addr(buff, map_addr),
950 				 dma_unmap_len(buff, map_len),
951 				 DMA_FROM_DEVICE);
952 		consume_skb(buff->skb);
953 	}
954 	kfree(rxq->rxbuffs);
955 }
956 
slic_set_link_autoneg(struct slic_device * sdev)957 static void slic_set_link_autoneg(struct slic_device *sdev)
958 {
959 	unsigned int subid = sdev->pdev->subsystem_device;
960 	u32 val;
961 
962 	if (sdev->is_fiber) {
963 		/* We've got a fiber gigabit interface, and register 4 is
964 		 * different in fiber mode than in copper mode.
965 		 */
966 		/* advertise FD only @1000 Mb */
967 		val = MII_ADVERTISE << 16 | ADVERTISE_1000XFULL |
968 		      ADVERTISE_1000XPAUSE | ADVERTISE_1000XPSE_ASYM;
969 		/* enable PAUSE frames */
970 		slic_write(sdev, SLIC_REG_WPHY, val);
971 		/* reset phy, enable auto-neg  */
972 		val = MII_BMCR << 16 | BMCR_RESET | BMCR_ANENABLE |
973 		      BMCR_ANRESTART;
974 		slic_write(sdev, SLIC_REG_WPHY, val);
975 	} else {	/* copper gigabit */
976 		/* We've got a copper gigabit interface, and register 4 is
977 		 * different in copper mode than in fiber mode.
978 		 */
979 		/* advertise 10/100 Mb modes   */
980 		val = MII_ADVERTISE << 16 | ADVERTISE_100FULL |
981 		      ADVERTISE_100HALF | ADVERTISE_10FULL | ADVERTISE_10HALF;
982 		/* enable PAUSE frames  */
983 		val |= ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
984 		/* required by the Cicada PHY  */
985 		val |= ADVERTISE_CSMA;
986 		slic_write(sdev, SLIC_REG_WPHY, val);
987 
988 		/* advertise FD only @1000 Mb  */
989 		val = MII_CTRL1000 << 16 | ADVERTISE_1000FULL;
990 		slic_write(sdev, SLIC_REG_WPHY, val);
991 
992 		if (subid != PCI_SUBDEVICE_ID_ALACRITECH_CICADA) {
993 			 /* if a Marvell PHY enable auto crossover */
994 			val = SLIC_MIICR_REG_16 | SLIC_MRV_REG16_XOVERON;
995 			slic_write(sdev, SLIC_REG_WPHY, val);
996 
997 			/* reset phy, enable auto-neg  */
998 			val = MII_BMCR << 16 | BMCR_RESET | BMCR_ANENABLE |
999 			      BMCR_ANRESTART;
1000 			slic_write(sdev, SLIC_REG_WPHY, val);
1001 		} else {
1002 			/* enable and restart auto-neg (don't reset)  */
1003 			val = MII_BMCR << 16 | BMCR_ANENABLE | BMCR_ANRESTART;
1004 			slic_write(sdev, SLIC_REG_WPHY, val);
1005 		}
1006 	}
1007 }
1008 
slic_set_mac_address(struct slic_device * sdev)1009 static void slic_set_mac_address(struct slic_device *sdev)
1010 {
1011 	const u8 *addr = sdev->netdev->dev_addr;
1012 	u32 val;
1013 
1014 	val = addr[5] | addr[4] << 8 | addr[3] << 16 | addr[2] << 24;
1015 
1016 	slic_write(sdev, SLIC_REG_WRADDRAL, val);
1017 	slic_write(sdev, SLIC_REG_WRADDRBL, val);
1018 
1019 	val = addr[0] << 8 | addr[1];
1020 
1021 	slic_write(sdev, SLIC_REG_WRADDRAH, val);
1022 	slic_write(sdev, SLIC_REG_WRADDRBH, val);
1023 	slic_flush_write(sdev);
1024 }
1025 
slic_read_dword_from_firmware(const struct firmware * fw,int * offset)1026 static u32 slic_read_dword_from_firmware(const struct firmware *fw, int *offset)
1027 {
1028 	int idx = *offset;
1029 	__le32 val;
1030 
1031 	memcpy(&val, fw->data + *offset, sizeof(val));
1032 	idx += 4;
1033 	*offset = idx;
1034 
1035 	return le32_to_cpu(val);
1036 }
1037 
1038 MODULE_FIRMWARE(SLIC_RCV_FIRMWARE_MOJAVE);
1039 MODULE_FIRMWARE(SLIC_RCV_FIRMWARE_OASIS);
1040 
slic_load_rcvseq_firmware(struct slic_device * sdev)1041 static int slic_load_rcvseq_firmware(struct slic_device *sdev)
1042 {
1043 	const struct firmware *fw;
1044 	const char *file;
1045 	u32 codelen;
1046 	int idx = 0;
1047 	u32 instr;
1048 	u32 addr;
1049 	int err;
1050 
1051 	file = (sdev->model == SLIC_MODEL_OASIS) ?  SLIC_RCV_FIRMWARE_OASIS :
1052 						    SLIC_RCV_FIRMWARE_MOJAVE;
1053 	err = request_firmware(&fw, file, &sdev->pdev->dev);
1054 	if (err) {
1055 		dev_err(&sdev->pdev->dev,
1056 			"failed to load receive sequencer firmware %s\n", file);
1057 		return err;
1058 	}
1059 	/* Do an initial sanity check concerning firmware size now. A further
1060 	 * check follows below.
1061 	 */
1062 	if (fw->size < SLIC_FIRMWARE_MIN_SIZE) {
1063 		dev_err(&sdev->pdev->dev,
1064 			"invalid firmware size %zu (min %u expected)\n",
1065 			fw->size, SLIC_FIRMWARE_MIN_SIZE);
1066 		err = -EINVAL;
1067 		goto release;
1068 	}
1069 
1070 	codelen = slic_read_dword_from_firmware(fw, &idx);
1071 
1072 	/* do another sanity check against firmware size */
1073 	if ((codelen + 4) > fw->size) {
1074 		dev_err(&sdev->pdev->dev,
1075 			"invalid rcv-sequencer firmware size %zu\n", fw->size);
1076 		err = -EINVAL;
1077 		goto release;
1078 	}
1079 
1080 	/* download sequencer code to card */
1081 	slic_write(sdev, SLIC_REG_RCV_WCS, SLIC_RCVWCS_BEGIN);
1082 	for (addr = 0; addr < codelen; addr++) {
1083 		__le32 val;
1084 		/* write out instruction address */
1085 		slic_write(sdev, SLIC_REG_RCV_WCS, addr);
1086 
1087 		instr = slic_read_dword_from_firmware(fw, &idx);
1088 		/* write out the instruction data low addr */
1089 		slic_write(sdev, SLIC_REG_RCV_WCS, instr);
1090 
1091 		val = (__le32)fw->data[idx];
1092 		instr = le32_to_cpu(val);
1093 		idx++;
1094 		/* write out the instruction data high addr */
1095 		slic_write(sdev, SLIC_REG_RCV_WCS, instr);
1096 	}
1097 	/* finish download */
1098 	slic_write(sdev, SLIC_REG_RCV_WCS, SLIC_RCVWCS_FINISH);
1099 	slic_flush_write(sdev);
1100 release:
1101 	release_firmware(fw);
1102 
1103 	return err;
1104 }
1105 
1106 MODULE_FIRMWARE(SLIC_FIRMWARE_MOJAVE);
1107 MODULE_FIRMWARE(SLIC_FIRMWARE_OASIS);
1108 
slic_load_firmware(struct slic_device * sdev)1109 static int slic_load_firmware(struct slic_device *sdev)
1110 {
1111 	u32 sectstart[SLIC_FIRMWARE_MAX_SECTIONS];
1112 	u32 sectsize[SLIC_FIRMWARE_MAX_SECTIONS];
1113 	const struct firmware *fw;
1114 	unsigned int datalen;
1115 	const char *file;
1116 	int code_start;
1117 	unsigned int i;
1118 	u32 numsects;
1119 	int idx = 0;
1120 	u32 sect;
1121 	u32 instr;
1122 	u32 addr;
1123 	u32 base;
1124 	int err;
1125 
1126 	file = (sdev->model == SLIC_MODEL_OASIS) ?  SLIC_FIRMWARE_OASIS :
1127 						    SLIC_FIRMWARE_MOJAVE;
1128 	err = request_firmware(&fw, file, &sdev->pdev->dev);
1129 	if (err) {
1130 		dev_err(&sdev->pdev->dev, "failed to load firmware %s\n", file);
1131 		return err;
1132 	}
1133 	/* Do an initial sanity check concerning firmware size now. A further
1134 	 * check follows below.
1135 	 */
1136 	if (fw->size < SLIC_FIRMWARE_MIN_SIZE) {
1137 		dev_err(&sdev->pdev->dev,
1138 			"invalid firmware size %zu (min is %u)\n", fw->size,
1139 			SLIC_FIRMWARE_MIN_SIZE);
1140 		err = -EINVAL;
1141 		goto release;
1142 	}
1143 
1144 	numsects = slic_read_dword_from_firmware(fw, &idx);
1145 	if (numsects == 0 || numsects > SLIC_FIRMWARE_MAX_SECTIONS) {
1146 		dev_err(&sdev->pdev->dev,
1147 			"invalid number of sections in firmware: %u", numsects);
1148 		err = -EINVAL;
1149 		goto release;
1150 	}
1151 
1152 	datalen = numsects * 8 + 4;
1153 	for (i = 0; i < numsects; i++) {
1154 		sectsize[i] = slic_read_dword_from_firmware(fw, &idx);
1155 		datalen += sectsize[i];
1156 	}
1157 
1158 	/* do another sanity check against firmware size */
1159 	if (datalen > fw->size) {
1160 		dev_err(&sdev->pdev->dev,
1161 			"invalid firmware size %zu (expected >= %u)\n",
1162 			fw->size, datalen);
1163 		err = -EINVAL;
1164 		goto release;
1165 	}
1166 	/* get sections */
1167 	for (i = 0; i < numsects; i++)
1168 		sectstart[i] = slic_read_dword_from_firmware(fw, &idx);
1169 
1170 	code_start = idx;
1171 	instr = slic_read_dword_from_firmware(fw, &idx);
1172 
1173 	for (sect = 0; sect < numsects; sect++) {
1174 		unsigned int ssize = sectsize[sect] >> 3;
1175 
1176 		base = sectstart[sect];
1177 
1178 		for (addr = 0; addr < ssize; addr++) {
1179 			/* write out instruction address */
1180 			slic_write(sdev, SLIC_REG_WCS, base + addr);
1181 			/* write out instruction to low addr */
1182 			slic_write(sdev, SLIC_REG_WCS, instr);
1183 			instr = slic_read_dword_from_firmware(fw, &idx);
1184 			/* write out instruction to high addr */
1185 			slic_write(sdev, SLIC_REG_WCS, instr);
1186 			instr = slic_read_dword_from_firmware(fw, &idx);
1187 		}
1188 	}
1189 
1190 	idx = code_start;
1191 
1192 	for (sect = 0; sect < numsects; sect++) {
1193 		unsigned int ssize = sectsize[sect] >> 3;
1194 
1195 		instr = slic_read_dword_from_firmware(fw, &idx);
1196 		base = sectstart[sect];
1197 		if (base < 0x8000)
1198 			continue;
1199 
1200 		for (addr = 0; addr < ssize; addr++) {
1201 			/* write out instruction address */
1202 			slic_write(sdev, SLIC_REG_WCS,
1203 				   SLIC_WCS_COMPARE | (base + addr));
1204 			/* write out instruction to low addr */
1205 			slic_write(sdev, SLIC_REG_WCS, instr);
1206 			instr = slic_read_dword_from_firmware(fw, &idx);
1207 			/* write out instruction to high addr */
1208 			slic_write(sdev, SLIC_REG_WCS, instr);
1209 			instr = slic_read_dword_from_firmware(fw, &idx);
1210 		}
1211 	}
1212 	slic_flush_write(sdev);
1213 	mdelay(10);
1214 	/* everything OK, kick off the card */
1215 	slic_write(sdev, SLIC_REG_WCS, SLIC_WCS_START);
1216 	slic_flush_write(sdev);
1217 	/* wait long enough for ucode to init card and reach the mainloop */
1218 	mdelay(20);
1219 release:
1220 	release_firmware(fw);
1221 
1222 	return err;
1223 }
1224 
slic_init_shmem(struct slic_device * sdev)1225 static int slic_init_shmem(struct slic_device *sdev)
1226 {
1227 	struct slic_shmem *sm = &sdev->shmem;
1228 	struct slic_shmem_data *sm_data;
1229 	dma_addr_t paddr;
1230 
1231 	sm_data = dma_alloc_coherent(&sdev->pdev->dev, sizeof(*sm_data),
1232 				     &paddr, GFP_KERNEL);
1233 	if (!sm_data) {
1234 		dev_err(&sdev->pdev->dev, "failed to allocate shared memory\n");
1235 		return -ENOMEM;
1236 	}
1237 
1238 	sm->shmem_data = sm_data;
1239 	sm->isr_paddr = paddr;
1240 	sm->link_paddr = paddr + offsetof(struct slic_shmem_data, link);
1241 
1242 	return 0;
1243 }
1244 
slic_free_shmem(struct slic_device * sdev)1245 static void slic_free_shmem(struct slic_device *sdev)
1246 {
1247 	struct slic_shmem *sm = &sdev->shmem;
1248 	struct slic_shmem_data *sm_data = sm->shmem_data;
1249 
1250 	dma_free_coherent(&sdev->pdev->dev, sizeof(*sm_data), sm_data,
1251 			  sm->isr_paddr);
1252 }
1253 
slic_init_iface(struct slic_device * sdev)1254 static int slic_init_iface(struct slic_device *sdev)
1255 {
1256 	struct slic_shmem *sm = &sdev->shmem;
1257 	int err;
1258 
1259 	sdev->upr_list.pending = false;
1260 
1261 	err = slic_init_shmem(sdev);
1262 	if (err) {
1263 		netdev_err(sdev->netdev, "failed to init shared memory\n");
1264 		return err;
1265 	}
1266 
1267 	err = slic_load_firmware(sdev);
1268 	if (err) {
1269 		netdev_err(sdev->netdev, "failed to load firmware\n");
1270 		goto free_sm;
1271 	}
1272 
1273 	err = slic_load_rcvseq_firmware(sdev);
1274 	if (err) {
1275 		netdev_err(sdev->netdev,
1276 			   "failed to load firmware for receive sequencer\n");
1277 		goto free_sm;
1278 	}
1279 
1280 	slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_OFF);
1281 	slic_flush_write(sdev);
1282 	mdelay(1);
1283 
1284 	err = slic_init_rx_queue(sdev);
1285 	if (err) {
1286 		netdev_err(sdev->netdev, "failed to init rx queue: %u\n", err);
1287 		goto free_sm;
1288 	}
1289 
1290 	err = slic_init_tx_queue(sdev);
1291 	if (err) {
1292 		netdev_err(sdev->netdev, "failed to init tx queue: %u\n", err);
1293 		goto free_rxq;
1294 	}
1295 
1296 	err = slic_init_stat_queue(sdev);
1297 	if (err) {
1298 		netdev_err(sdev->netdev, "failed to init status queue: %u\n",
1299 			   err);
1300 		goto free_txq;
1301 	}
1302 
1303 	slic_write(sdev, SLIC_REG_ISP, lower_32_bits(sm->isr_paddr));
1304 	napi_enable(&sdev->napi);
1305 	/* disable irq mitigation */
1306 	slic_write(sdev, SLIC_REG_INTAGG, 0);
1307 	slic_write(sdev, SLIC_REG_ISR, 0);
1308 	slic_flush_write(sdev);
1309 
1310 	slic_set_mac_address(sdev);
1311 
1312 	spin_lock_bh(&sdev->link_lock);
1313 	sdev->duplex = DUPLEX_UNKNOWN;
1314 	sdev->speed = SPEED_UNKNOWN;
1315 	spin_unlock_bh(&sdev->link_lock);
1316 
1317 	slic_set_link_autoneg(sdev);
1318 
1319 	err = request_irq(sdev->pdev->irq, slic_irq, IRQF_SHARED, DRV_NAME,
1320 			  sdev);
1321 	if (err) {
1322 		netdev_err(sdev->netdev, "failed to request irq: %u\n", err);
1323 		goto disable_napi;
1324 	}
1325 
1326 	slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_ON);
1327 	slic_flush_write(sdev);
1328 	/* request initial link status */
1329 	err = slic_handle_link_change(sdev);
1330 	if (err)
1331 		netdev_warn(sdev->netdev,
1332 			    "failed to set initial link state: %u\n", err);
1333 	return 0;
1334 
1335 disable_napi:
1336 	napi_disable(&sdev->napi);
1337 	slic_free_stat_queue(sdev);
1338 free_txq:
1339 	slic_free_tx_queue(sdev);
1340 free_rxq:
1341 	slic_free_rx_queue(sdev);
1342 free_sm:
1343 	slic_free_shmem(sdev);
1344 	slic_card_reset(sdev);
1345 
1346 	return err;
1347 }
1348 
slic_open(struct net_device * dev)1349 static int slic_open(struct net_device *dev)
1350 {
1351 	struct slic_device *sdev = netdev_priv(dev);
1352 	int err;
1353 
1354 	netif_carrier_off(dev);
1355 
1356 	err = slic_init_iface(sdev);
1357 	if (err) {
1358 		netdev_err(dev, "failed to initialize interface: %i\n", err);
1359 		return err;
1360 	}
1361 
1362 	netif_start_queue(dev);
1363 
1364 	return 0;
1365 }
1366 
slic_close(struct net_device * dev)1367 static int slic_close(struct net_device *dev)
1368 {
1369 	struct slic_device *sdev = netdev_priv(dev);
1370 	u32 val;
1371 
1372 	netif_stop_queue(dev);
1373 
1374 	/* stop irq handling */
1375 	napi_disable(&sdev->napi);
1376 	slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_OFF);
1377 	slic_write(sdev, SLIC_REG_ISR, 0);
1378 	slic_flush_write(sdev);
1379 
1380 	free_irq(sdev->pdev->irq, sdev);
1381 	/* turn off RCV and XMT and power down PHY */
1382 	val = SLIC_GXCR_RESET | SLIC_GXCR_PAUSEEN;
1383 	slic_write(sdev, SLIC_REG_WXCFG, val);
1384 
1385 	val = SLIC_GRCR_RESET | SLIC_GRCR_CTLEN | SLIC_GRCR_ADDRAEN |
1386 	      SLIC_GRCR_HASHSIZE << SLIC_GRCR_HASHSIZE_SHIFT;
1387 	slic_write(sdev, SLIC_REG_WRCFG, val);
1388 
1389 	val = MII_BMCR << 16 | BMCR_PDOWN;
1390 	slic_write(sdev, SLIC_REG_WPHY, val);
1391 	slic_flush_write(sdev);
1392 
1393 	slic_clear_upr_list(&sdev->upr_list);
1394 	slic_write(sdev, SLIC_REG_QUIESCE, 0);
1395 
1396 	slic_free_stat_queue(sdev);
1397 	slic_free_tx_queue(sdev);
1398 	slic_free_rx_queue(sdev);
1399 	slic_free_shmem(sdev);
1400 
1401 	slic_card_reset(sdev);
1402 	netif_carrier_off(dev);
1403 
1404 	return 0;
1405 }
1406 
slic_xmit(struct sk_buff * skb,struct net_device * dev)1407 static netdev_tx_t slic_xmit(struct sk_buff *skb, struct net_device *dev)
1408 {
1409 	struct slic_device *sdev = netdev_priv(dev);
1410 	struct slic_tx_queue *txq = &sdev->txq;
1411 	struct slic_tx_buffer *buff;
1412 	struct slic_tx_desc *desc;
1413 	dma_addr_t paddr;
1414 	u32 cbar_val;
1415 	u32 maplen;
1416 
1417 	if (unlikely(slic_get_free_tx_descs(txq) < SLIC_MAX_REQ_TX_DESCS)) {
1418 		netdev_err(dev, "BUG! not enough tx LEs left: %u\n",
1419 			   slic_get_free_tx_descs(txq));
1420 		return NETDEV_TX_BUSY;
1421 	}
1422 
1423 	maplen = skb_headlen(skb);
1424 	paddr = dma_map_single(&sdev->pdev->dev, skb->data, maplen,
1425 			       DMA_TO_DEVICE);
1426 	if (dma_mapping_error(&sdev->pdev->dev, paddr)) {
1427 		netdev_err(dev, "failed to map tx buffer\n");
1428 		goto drop_skb;
1429 	}
1430 
1431 	buff = &txq->txbuffs[txq->put_idx];
1432 	buff->skb = skb;
1433 	dma_unmap_addr_set(buff, map_addr, paddr);
1434 	dma_unmap_len_set(buff, map_len, maplen);
1435 
1436 	desc = buff->desc;
1437 	desc->totlen = cpu_to_le32(maplen);
1438 	desc->paddrl = cpu_to_le32(lower_32_bits(paddr));
1439 	desc->paddrh = cpu_to_le32(upper_32_bits(paddr));
1440 	desc->len = cpu_to_le32(maplen);
1441 
1442 	txq->put_idx = slic_next_queue_idx(txq->put_idx, txq->len);
1443 
1444 	cbar_val = lower_32_bits(buff->desc_paddr) | 1;
1445 	/* complete writes to RAM and DMA before hardware is informed */
1446 	wmb();
1447 
1448 	slic_write(sdev, SLIC_REG_CBAR, cbar_val);
1449 
1450 	if (slic_get_free_tx_descs(txq) < SLIC_MAX_REQ_TX_DESCS)
1451 		netif_stop_queue(dev);
1452 
1453 	return NETDEV_TX_OK;
1454 drop_skb:
1455 	dev_kfree_skb_any(skb);
1456 
1457 	return NETDEV_TX_OK;
1458 }
1459 
slic_get_stats(struct net_device * dev,struct rtnl_link_stats64 * lst)1460 static void slic_get_stats(struct net_device *dev,
1461 			   struct rtnl_link_stats64 *lst)
1462 {
1463 	struct slic_device *sdev = netdev_priv(dev);
1464 	struct slic_stats *stats = &sdev->stats;
1465 
1466 	SLIC_GET_STATS_COUNTER(lst->rx_packets, stats, rx_packets);
1467 	SLIC_GET_STATS_COUNTER(lst->tx_packets, stats, tx_packets);
1468 	SLIC_GET_STATS_COUNTER(lst->rx_bytes, stats, rx_bytes);
1469 	SLIC_GET_STATS_COUNTER(lst->tx_bytes, stats, tx_bytes);
1470 	SLIC_GET_STATS_COUNTER(lst->rx_errors, stats, rx_errors);
1471 	SLIC_GET_STATS_COUNTER(lst->rx_dropped, stats, rx_buff_miss);
1472 	SLIC_GET_STATS_COUNTER(lst->tx_dropped, stats, tx_dropped);
1473 	SLIC_GET_STATS_COUNTER(lst->multicast, stats, rx_mcasts);
1474 	SLIC_GET_STATS_COUNTER(lst->rx_over_errors, stats, rx_buffoflow);
1475 	SLIC_GET_STATS_COUNTER(lst->rx_crc_errors, stats, rx_crc);
1476 	SLIC_GET_STATS_COUNTER(lst->rx_fifo_errors, stats, rx_oflow802);
1477 	SLIC_GET_STATS_COUNTER(lst->tx_carrier_errors, stats, tx_carrier);
1478 }
1479 
slic_get_sset_count(struct net_device * dev,int sset)1480 static int slic_get_sset_count(struct net_device *dev, int sset)
1481 {
1482 	switch (sset) {
1483 	case ETH_SS_STATS:
1484 		return ARRAY_SIZE(slic_stats_strings);
1485 	default:
1486 		return -EOPNOTSUPP;
1487 	}
1488 }
1489 
slic_get_ethtool_stats(struct net_device * dev,struct ethtool_stats * eth_stats,u64 * data)1490 static void slic_get_ethtool_stats(struct net_device *dev,
1491 				   struct ethtool_stats *eth_stats, u64 *data)
1492 {
1493 	struct slic_device *sdev = netdev_priv(dev);
1494 	struct slic_stats *stats = &sdev->stats;
1495 
1496 	SLIC_GET_STATS_COUNTER(data[0], stats, rx_packets);
1497 	SLIC_GET_STATS_COUNTER(data[1], stats, rx_bytes);
1498 	SLIC_GET_STATS_COUNTER(data[2], stats, rx_mcasts);
1499 	SLIC_GET_STATS_COUNTER(data[3], stats, rx_errors);
1500 	SLIC_GET_STATS_COUNTER(data[4], stats, rx_buff_miss);
1501 	SLIC_GET_STATS_COUNTER(data[5], stats, rx_tpcsum);
1502 	SLIC_GET_STATS_COUNTER(data[6], stats, rx_tpoflow);
1503 	SLIC_GET_STATS_COUNTER(data[7], stats, rx_tphlen);
1504 	SLIC_GET_STATS_COUNTER(data[8], stats, rx_ipcsum);
1505 	SLIC_GET_STATS_COUNTER(data[9], stats, rx_iplen);
1506 	SLIC_GET_STATS_COUNTER(data[10], stats, rx_iphlen);
1507 	SLIC_GET_STATS_COUNTER(data[11], stats, rx_early);
1508 	SLIC_GET_STATS_COUNTER(data[12], stats, rx_buffoflow);
1509 	SLIC_GET_STATS_COUNTER(data[13], stats, rx_lcode);
1510 	SLIC_GET_STATS_COUNTER(data[14], stats, rx_drbl);
1511 	SLIC_GET_STATS_COUNTER(data[15], stats, rx_crc);
1512 	SLIC_GET_STATS_COUNTER(data[16], stats, rx_oflow802);
1513 	SLIC_GET_STATS_COUNTER(data[17], stats, rx_uflow802);
1514 	SLIC_GET_STATS_COUNTER(data[18], stats, tx_packets);
1515 	SLIC_GET_STATS_COUNTER(data[19], stats, tx_bytes);
1516 	SLIC_GET_STATS_COUNTER(data[20], stats, tx_carrier);
1517 	SLIC_GET_STATS_COUNTER(data[21], stats, tx_dropped);
1518 	SLIC_GET_STATS_COUNTER(data[22], stats, irq_errs);
1519 }
1520 
slic_get_strings(struct net_device * dev,u32 stringset,u8 * data)1521 static void slic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1522 {
1523 	if (stringset == ETH_SS_STATS)
1524 		memcpy(data, slic_stats_strings, sizeof(slic_stats_strings));
1525 }
1526 
slic_get_drvinfo(struct net_device * dev,struct ethtool_drvinfo * info)1527 static void slic_get_drvinfo(struct net_device *dev,
1528 			     struct ethtool_drvinfo *info)
1529 {
1530 	struct slic_device *sdev = netdev_priv(dev);
1531 
1532 	strscpy(info->driver, DRV_NAME, sizeof(info->driver));
1533 	strscpy(info->bus_info, pci_name(sdev->pdev), sizeof(info->bus_info));
1534 }
1535 
1536 static const struct ethtool_ops slic_ethtool_ops = {
1537 	.get_drvinfo		= slic_get_drvinfo,
1538 	.get_link		= ethtool_op_get_link,
1539 	.get_strings		= slic_get_strings,
1540 	.get_ethtool_stats	= slic_get_ethtool_stats,
1541 	.get_sset_count		= slic_get_sset_count,
1542 };
1543 
1544 static const struct net_device_ops slic_netdev_ops = {
1545 	.ndo_open		= slic_open,
1546 	.ndo_stop		= slic_close,
1547 	.ndo_start_xmit		= slic_xmit,
1548 	.ndo_set_mac_address	= eth_mac_addr,
1549 	.ndo_get_stats64	= slic_get_stats,
1550 	.ndo_set_rx_mode	= slic_set_rx_mode,
1551 	.ndo_validate_addr	= eth_validate_addr,
1552 };
1553 
slic_eeprom_csum(unsigned char * eeprom,unsigned int len)1554 static u16 slic_eeprom_csum(unsigned char *eeprom, unsigned int len)
1555 {
1556 	unsigned char *ptr = eeprom;
1557 	u32 csum = 0;
1558 	__le16 data;
1559 
1560 	while (len > 1) {
1561 		memcpy(&data, ptr, sizeof(data));
1562 		csum += le16_to_cpu(data);
1563 		ptr += 2;
1564 		len -= 2;
1565 	}
1566 	if (len > 0)
1567 		csum += *(u8 *)ptr;
1568 	while (csum >> 16)
1569 		csum = (csum & 0xFFFF) + ((csum >> 16) & 0xFFFF);
1570 	return ~csum;
1571 }
1572 
1573 /* check eeprom size, magic and checksum */
slic_eeprom_valid(unsigned char * eeprom,unsigned int size)1574 static bool slic_eeprom_valid(unsigned char *eeprom, unsigned int size)
1575 {
1576 	const unsigned int MAX_SIZE = 128;
1577 	const unsigned int MIN_SIZE = 98;
1578 	__le16 magic;
1579 	__le16 csum;
1580 
1581 	if (size < MIN_SIZE || size > MAX_SIZE)
1582 		return false;
1583 	memcpy(&magic, eeprom, sizeof(magic));
1584 	if (le16_to_cpu(magic) != SLIC_EEPROM_MAGIC)
1585 		return false;
1586 	/* cut checksum bytes */
1587 	size -= 2;
1588 	memcpy(&csum, eeprom + size, sizeof(csum));
1589 
1590 	return (le16_to_cpu(csum) == slic_eeprom_csum(eeprom, size));
1591 }
1592 
slic_read_eeprom(struct slic_device * sdev)1593 static int slic_read_eeprom(struct slic_device *sdev)
1594 {
1595 	unsigned int devfn = PCI_FUNC(sdev->pdev->devfn);
1596 	struct slic_shmem *sm = &sdev->shmem;
1597 	struct slic_shmem_data *sm_data = sm->shmem_data;
1598 	const unsigned int MAX_LOOPS = 5000;
1599 	unsigned int codesize;
1600 	unsigned char *eeprom;
1601 	struct slic_upr *upr;
1602 	unsigned int i = 0;
1603 	dma_addr_t paddr;
1604 	int err = 0;
1605 	u8 *mac[2];
1606 
1607 	eeprom = dma_alloc_coherent(&sdev->pdev->dev, SLIC_EEPROM_SIZE,
1608 				    &paddr, GFP_KERNEL);
1609 	if (!eeprom)
1610 		return -ENOMEM;
1611 
1612 	slic_write(sdev, SLIC_REG_ICR, SLIC_ICR_INT_OFF);
1613 	/* setup ISP temporarily */
1614 	slic_write(sdev, SLIC_REG_ISP, lower_32_bits(sm->isr_paddr));
1615 
1616 	err = slic_new_upr(sdev, SLIC_UPR_CONFIG, paddr);
1617 	if (!err) {
1618 		for (i = 0; i < MAX_LOOPS; i++) {
1619 			if (le32_to_cpu(sm_data->isr) & SLIC_ISR_UPC)
1620 				break;
1621 			mdelay(1);
1622 		}
1623 		if (i == MAX_LOOPS) {
1624 			dev_err(&sdev->pdev->dev,
1625 				"timed out while waiting for eeprom data\n");
1626 			err = -ETIMEDOUT;
1627 		}
1628 		upr = slic_dequeue_upr(sdev);
1629 		kfree(upr);
1630 	}
1631 
1632 	slic_write(sdev, SLIC_REG_ISP, 0);
1633 	slic_write(sdev, SLIC_REG_ISR, 0);
1634 	slic_flush_write(sdev);
1635 
1636 	if (err)
1637 		goto free_eeprom;
1638 
1639 	if (sdev->model == SLIC_MODEL_OASIS) {
1640 		struct slic_oasis_eeprom *oee;
1641 
1642 		oee = (struct slic_oasis_eeprom *)eeprom;
1643 		mac[0] = oee->mac;
1644 		mac[1] = oee->mac2;
1645 		codesize = le16_to_cpu(oee->eeprom_code_size);
1646 	} else {
1647 		struct slic_mojave_eeprom *mee;
1648 
1649 		mee = (struct slic_mojave_eeprom *)eeprom;
1650 		mac[0] = mee->mac;
1651 		mac[1] = mee->mac2;
1652 		codesize = le16_to_cpu(mee->eeprom_code_size);
1653 	}
1654 
1655 	if (!slic_eeprom_valid(eeprom, codesize)) {
1656 		dev_err(&sdev->pdev->dev, "invalid checksum in eeprom\n");
1657 		err = -EINVAL;
1658 		goto free_eeprom;
1659 	}
1660 	/* set mac address */
1661 	eth_hw_addr_set(sdev->netdev, mac[devfn]);
1662 free_eeprom:
1663 	dma_free_coherent(&sdev->pdev->dev, SLIC_EEPROM_SIZE, eeprom, paddr);
1664 
1665 	return err;
1666 }
1667 
slic_init(struct slic_device * sdev)1668 static int slic_init(struct slic_device *sdev)
1669 {
1670 	int err;
1671 
1672 	spin_lock_init(&sdev->upper_lock);
1673 	spin_lock_init(&sdev->link_lock);
1674 	INIT_LIST_HEAD(&sdev->upr_list.list);
1675 	spin_lock_init(&sdev->upr_list.lock);
1676 	u64_stats_init(&sdev->stats.syncp);
1677 
1678 	slic_card_reset(sdev);
1679 
1680 	err = slic_load_firmware(sdev);
1681 	if (err) {
1682 		dev_err(&sdev->pdev->dev, "failed to load firmware\n");
1683 		return err;
1684 	}
1685 
1686 	/* we need the shared memory to read EEPROM so set it up temporarily */
1687 	err = slic_init_shmem(sdev);
1688 	if (err) {
1689 		dev_err(&sdev->pdev->dev, "failed to init shared memory\n");
1690 		return err;
1691 	}
1692 
1693 	err = slic_read_eeprom(sdev);
1694 	if (err) {
1695 		dev_err(&sdev->pdev->dev, "failed to read eeprom\n");
1696 		goto free_sm;
1697 	}
1698 
1699 	slic_card_reset(sdev);
1700 	slic_free_shmem(sdev);
1701 
1702 	return 0;
1703 free_sm:
1704 	slic_free_shmem(sdev);
1705 
1706 	return err;
1707 }
1708 
slic_is_fiber(unsigned short subdev)1709 static bool slic_is_fiber(unsigned short subdev)
1710 {
1711 	switch (subdev) {
1712 	/* Mojave */
1713 	case PCI_SUBDEVICE_ID_ALACRITECH_1000X1F:
1714 	case PCI_SUBDEVICE_ID_ALACRITECH_SES1001F: fallthrough;
1715 	/* Oasis */
1716 	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2002XF:
1717 	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2001XF:
1718 	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2104EF:
1719 	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2102EF:
1720 		return true;
1721 	}
1722 	return false;
1723 }
1724 
slic_configure_pci(struct pci_dev * pdev)1725 static void slic_configure_pci(struct pci_dev *pdev)
1726 {
1727 	u16 old;
1728 	u16 cmd;
1729 
1730 	pci_read_config_word(pdev, PCI_COMMAND, &old);
1731 
1732 	cmd = old | PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
1733 	if (old != cmd)
1734 		pci_write_config_word(pdev, PCI_COMMAND, cmd);
1735 }
1736 
slic_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1737 static int slic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1738 {
1739 	struct slic_device *sdev;
1740 	struct net_device *dev;
1741 	int err;
1742 
1743 	err = pci_enable_device(pdev);
1744 	if (err) {
1745 		dev_err(&pdev->dev, "failed to enable PCI device\n");
1746 		return err;
1747 	}
1748 
1749 	pci_set_master(pdev);
1750 	pci_try_set_mwi(pdev);
1751 
1752 	slic_configure_pci(pdev);
1753 
1754 	err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
1755 	if (err) {
1756 		dev_err(&pdev->dev, "failed to setup DMA\n");
1757 		goto disable;
1758 	}
1759 
1760 	dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
1761 
1762 	err = pci_request_regions(pdev, DRV_NAME);
1763 	if (err) {
1764 		dev_err(&pdev->dev, "failed to obtain PCI regions\n");
1765 		goto disable;
1766 	}
1767 
1768 	dev = alloc_etherdev(sizeof(*sdev));
1769 	if (!dev) {
1770 		dev_err(&pdev->dev, "failed to alloc ethernet device\n");
1771 		err = -ENOMEM;
1772 		goto free_regions;
1773 	}
1774 
1775 	SET_NETDEV_DEV(dev, &pdev->dev);
1776 	pci_set_drvdata(pdev, dev);
1777 	dev->irq = pdev->irq;
1778 	dev->netdev_ops = &slic_netdev_ops;
1779 	dev->hw_features = NETIF_F_RXCSUM;
1780 	dev->features |= dev->hw_features;
1781 
1782 	dev->ethtool_ops = &slic_ethtool_ops;
1783 
1784 	sdev = netdev_priv(dev);
1785 	sdev->model = (pdev->device == PCI_DEVICE_ID_ALACRITECH_OASIS) ?
1786 		      SLIC_MODEL_OASIS : SLIC_MODEL_MOJAVE;
1787 	sdev->is_fiber = slic_is_fiber(pdev->subsystem_device);
1788 	sdev->pdev = pdev;
1789 	sdev->netdev = dev;
1790 	sdev->regs = ioremap(pci_resource_start(pdev, 0),
1791 				     pci_resource_len(pdev, 0));
1792 	if (!sdev->regs) {
1793 		dev_err(&pdev->dev, "failed to map registers\n");
1794 		err = -ENOMEM;
1795 		goto free_netdev;
1796 	}
1797 
1798 	err = slic_init(sdev);
1799 	if (err) {
1800 		dev_err(&pdev->dev, "failed to initialize driver\n");
1801 		goto unmap;
1802 	}
1803 
1804 	netif_napi_add(dev, &sdev->napi, slic_poll);
1805 	netif_carrier_off(dev);
1806 
1807 	err = register_netdev(dev);
1808 	if (err) {
1809 		dev_err(&pdev->dev, "failed to register net device: %i\n", err);
1810 		goto unmap;
1811 	}
1812 
1813 	return 0;
1814 
1815 unmap:
1816 	iounmap(sdev->regs);
1817 free_netdev:
1818 	free_netdev(dev);
1819 free_regions:
1820 	pci_release_regions(pdev);
1821 disable:
1822 	pci_disable_device(pdev);
1823 
1824 	return err;
1825 }
1826 
slic_remove(struct pci_dev * pdev)1827 static void slic_remove(struct pci_dev *pdev)
1828 {
1829 	struct net_device *dev = pci_get_drvdata(pdev);
1830 	struct slic_device *sdev = netdev_priv(dev);
1831 
1832 	unregister_netdev(dev);
1833 	iounmap(sdev->regs);
1834 	free_netdev(dev);
1835 	pci_release_regions(pdev);
1836 	pci_disable_device(pdev);
1837 }
1838 
1839 static struct pci_driver slic_driver = {
1840 	.name = DRV_NAME,
1841 	.id_table = slic_id_tbl,
1842 	.probe = slic_probe,
1843 	.remove = slic_remove,
1844 };
1845 
1846 module_pci_driver(slic_driver);
1847 
1848 MODULE_DESCRIPTION("Alacritech non-accelerated SLIC driver");
1849 MODULE_AUTHOR("Lino Sanfilippo <LinoSanfilippo@gmx.de>");
1850 MODULE_LICENSE("GPL");
1851