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e6ad7673 IS |
1 | /* Applied Micro X-Gene SoC Ethernet Driver |
2 | * | |
3 | * Copyright (c) 2014, Applied Micro Circuits Corporation | |
4 | * Authors: Iyappan Subramanian <isubramanian@apm.com> | |
5 | * Ravi Patel <rapatel@apm.com> | |
6 | * Keyur Chudgar <kchudgar@apm.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
27ecf87c | 22 | #include <linux/gpio.h> |
e6ad7673 IS |
23 | #include "xgene_enet_main.h" |
24 | #include "xgene_enet_hw.h" | |
32f784b5 | 25 | #include "xgene_enet_sgmac.h" |
0148d38d | 26 | #include "xgene_enet_xgmac.h" |
e6ad7673 | 27 | |
de7b5b3d FK |
28 | #define RES_ENET_CSR 0 |
29 | #define RES_RING_CSR 1 | |
30 | #define RES_RING_CMD 2 | |
31 | ||
bc1b7c13 | 32 | static const struct of_device_id xgene_enet_of_match[]; |
0738c54d | 33 | static const struct acpi_device_id xgene_enet_acpi_match[]; |
bc1b7c13 | 34 | |
e6ad7673 IS |
35 | static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool) |
36 | { | |
37 | struct xgene_enet_raw_desc16 *raw_desc; | |
38 | int i; | |
39 | ||
a9380b0f IS |
40 | if (!buf_pool) |
41 | return; | |
42 | ||
e6ad7673 IS |
43 | for (i = 0; i < buf_pool->slots; i++) { |
44 | raw_desc = &buf_pool->raw_desc16[i]; | |
45 | ||
46 | /* Hardware expects descriptor in little endian format */ | |
47 | raw_desc->m0 = cpu_to_le64(i | | |
48 | SET_VAL(FPQNUM, buf_pool->dst_ring_num) | | |
49 | SET_VAL(STASH, 3)); | |
50 | } | |
51 | } | |
52 | ||
a9380b0f IS |
53 | static u16 xgene_enet_get_data_len(u64 bufdatalen) |
54 | { | |
55 | u16 hw_len, mask; | |
56 | ||
57 | hw_len = GET_VAL(BUFDATALEN, bufdatalen); | |
58 | ||
59 | if (unlikely(hw_len == 0x7800)) { | |
60 | return 0; | |
61 | } else if (!(hw_len & BIT(14))) { | |
62 | mask = GENMASK(13, 0); | |
63 | return (hw_len & mask) ? (hw_len & mask) : SIZE_16K; | |
64 | } else if (!(hw_len & GENMASK(13, 12))) { | |
65 | mask = GENMASK(11, 0); | |
66 | return (hw_len & mask) ? (hw_len & mask) : SIZE_4K; | |
67 | } else { | |
68 | mask = GENMASK(11, 0); | |
69 | return (hw_len & mask) ? (hw_len & mask) : SIZE_2K; | |
70 | } | |
71 | } | |
72 | ||
73 | static u16 xgene_enet_set_data_len(u32 size) | |
74 | { | |
75 | u16 hw_len; | |
76 | ||
77 | hw_len = (size == SIZE_4K) ? BIT(14) : 0; | |
78 | ||
79 | return hw_len; | |
80 | } | |
81 | ||
82 | static int xgene_enet_refill_pagepool(struct xgene_enet_desc_ring *buf_pool, | |
83 | u32 nbuf) | |
84 | { | |
85 | struct xgene_enet_raw_desc16 *raw_desc; | |
86 | struct xgene_enet_pdata *pdata; | |
87 | struct net_device *ndev; | |
88 | dma_addr_t dma_addr; | |
89 | struct device *dev; | |
90 | struct page *page; | |
91 | u32 slots, tail; | |
92 | u16 hw_len; | |
93 | int i; | |
94 | ||
95 | if (unlikely(!buf_pool)) | |
96 | return 0; | |
97 | ||
98 | ndev = buf_pool->ndev; | |
99 | pdata = netdev_priv(ndev); | |
100 | dev = ndev_to_dev(ndev); | |
101 | slots = buf_pool->slots - 1; | |
102 | tail = buf_pool->tail; | |
103 | ||
104 | for (i = 0; i < nbuf; i++) { | |
105 | raw_desc = &buf_pool->raw_desc16[tail]; | |
106 | ||
107 | page = dev_alloc_page(); | |
108 | if (unlikely(!page)) | |
109 | return -ENOMEM; | |
110 | ||
111 | dma_addr = dma_map_page(dev, page, 0, | |
112 | PAGE_SIZE, DMA_FROM_DEVICE); | |
113 | if (unlikely(dma_mapping_error(dev, dma_addr))) { | |
114 | put_page(page); | |
115 | return -ENOMEM; | |
116 | } | |
117 | ||
118 | hw_len = xgene_enet_set_data_len(PAGE_SIZE); | |
119 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | | |
120 | SET_VAL(BUFDATALEN, hw_len) | | |
121 | SET_BIT(COHERENT)); | |
122 | ||
123 | buf_pool->frag_page[tail] = page; | |
124 | tail = (tail + 1) & slots; | |
125 | } | |
126 | ||
127 | pdata->ring_ops->wr_cmd(buf_pool, nbuf); | |
128 | buf_pool->tail = tail; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
e6ad7673 IS |
133 | static int xgene_enet_refill_bufpool(struct xgene_enet_desc_ring *buf_pool, |
134 | u32 nbuf) | |
135 | { | |
136 | struct sk_buff *skb; | |
137 | struct xgene_enet_raw_desc16 *raw_desc; | |
81cefb81 | 138 | struct xgene_enet_pdata *pdata; |
e6ad7673 IS |
139 | struct net_device *ndev; |
140 | struct device *dev; | |
141 | dma_addr_t dma_addr; | |
142 | u32 tail = buf_pool->tail; | |
143 | u32 slots = buf_pool->slots - 1; | |
144 | u16 bufdatalen, len; | |
145 | int i; | |
146 | ||
147 | ndev = buf_pool->ndev; | |
148 | dev = ndev_to_dev(buf_pool->ndev); | |
81cefb81 | 149 | pdata = netdev_priv(ndev); |
a9380b0f | 150 | |
e6ad7673 | 151 | bufdatalen = BUF_LEN_CODE_2K | (SKB_BUFFER_SIZE & GENMASK(11, 0)); |
a9380b0f | 152 | len = XGENE_ENET_STD_MTU; |
e6ad7673 IS |
153 | |
154 | for (i = 0; i < nbuf; i++) { | |
155 | raw_desc = &buf_pool->raw_desc16[tail]; | |
156 | ||
157 | skb = netdev_alloc_skb_ip_align(ndev, len); | |
158 | if (unlikely(!skb)) | |
159 | return -ENOMEM; | |
e6ad7673 IS |
160 | |
161 | dma_addr = dma_map_single(dev, skb->data, len, DMA_FROM_DEVICE); | |
162 | if (dma_mapping_error(dev, dma_addr)) { | |
163 | netdev_err(ndev, "DMA mapping error\n"); | |
164 | dev_kfree_skb_any(skb); | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
6e434627 IS |
168 | buf_pool->rx_skb[tail] = skb; |
169 | ||
e6ad7673 IS |
170 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
171 | SET_VAL(BUFDATALEN, bufdatalen) | | |
172 | SET_BIT(COHERENT)); | |
173 | tail = (tail + 1) & slots; | |
174 | } | |
175 | ||
81cefb81 | 176 | pdata->ring_ops->wr_cmd(buf_pool, nbuf); |
e6ad7673 IS |
177 | buf_pool->tail = tail; |
178 | ||
179 | return 0; | |
180 | } | |
181 | ||
e6ad7673 IS |
182 | static u8 xgene_enet_hdr_len(const void *data) |
183 | { | |
184 | const struct ethhdr *eth = data; | |
185 | ||
186 | return (eth->h_proto == htons(ETH_P_8021Q)) ? VLAN_ETH_HLEN : ETH_HLEN; | |
187 | } | |
188 | ||
e6ad7673 IS |
189 | static void xgene_enet_delete_bufpool(struct xgene_enet_desc_ring *buf_pool) |
190 | { | |
6e434627 IS |
191 | struct device *dev = ndev_to_dev(buf_pool->ndev); |
192 | struct xgene_enet_raw_desc16 *raw_desc; | |
193 | dma_addr_t dma_addr; | |
cb11c062 | 194 | int i; |
e6ad7673 | 195 | |
cb11c062 IS |
196 | /* Free up the buffers held by hardware */ |
197 | for (i = 0; i < buf_pool->slots; i++) { | |
6e434627 | 198 | if (buf_pool->rx_skb[i]) { |
cb11c062 | 199 | dev_kfree_skb_any(buf_pool->rx_skb[i]); |
6e434627 IS |
200 | |
201 | raw_desc = &buf_pool->raw_desc16[i]; | |
202 | dma_addr = GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)); | |
203 | dma_unmap_single(dev, dma_addr, XGENE_ENET_MAX_MTU, | |
204 | DMA_FROM_DEVICE); | |
205 | } | |
e6ad7673 | 206 | } |
e6ad7673 IS |
207 | } |
208 | ||
a9380b0f IS |
209 | static void xgene_enet_delete_pagepool(struct xgene_enet_desc_ring *buf_pool) |
210 | { | |
211 | struct device *dev = ndev_to_dev(buf_pool->ndev); | |
212 | dma_addr_t dma_addr; | |
213 | struct page *page; | |
214 | int i; | |
215 | ||
216 | /* Free up the buffers held by hardware */ | |
217 | for (i = 0; i < buf_pool->slots; i++) { | |
218 | page = buf_pool->frag_page[i]; | |
219 | if (page) { | |
220 | dma_addr = buf_pool->frag_dma_addr[i]; | |
221 | dma_unmap_page(dev, dma_addr, PAGE_SIZE, | |
222 | DMA_FROM_DEVICE); | |
223 | put_page(page); | |
224 | } | |
225 | } | |
226 | } | |
227 | ||
e6ad7673 IS |
228 | static irqreturn_t xgene_enet_rx_irq(const int irq, void *data) |
229 | { | |
230 | struct xgene_enet_desc_ring *rx_ring = data; | |
231 | ||
232 | if (napi_schedule_prep(&rx_ring->napi)) { | |
233 | disable_irq_nosync(irq); | |
234 | __napi_schedule(&rx_ring->napi); | |
235 | } | |
236 | ||
237 | return IRQ_HANDLED; | |
238 | } | |
239 | ||
240 | static int xgene_enet_tx_completion(struct xgene_enet_desc_ring *cp_ring, | |
241 | struct xgene_enet_raw_desc *raw_desc) | |
242 | { | |
e3978673 | 243 | struct xgene_enet_pdata *pdata = netdev_priv(cp_ring->ndev); |
e6ad7673 IS |
244 | struct sk_buff *skb; |
245 | struct device *dev; | |
9b00eb49 IS |
246 | skb_frag_t *frag; |
247 | dma_addr_t *frag_dma_addr; | |
e6ad7673 | 248 | u16 skb_index; |
e3978673 | 249 | u8 mss_index; |
089f97c7 QN |
250 | u8 status; |
251 | int i; | |
e6ad7673 IS |
252 | |
253 | skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); | |
254 | skb = cp_ring->cp_skb[skb_index]; | |
9b00eb49 | 255 | frag_dma_addr = &cp_ring->frag_dma_addr[skb_index * MAX_SKB_FRAGS]; |
e6ad7673 IS |
256 | |
257 | dev = ndev_to_dev(cp_ring->ndev); | |
258 | dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), | |
9b00eb49 | 259 | skb_headlen(skb), |
e6ad7673 IS |
260 | DMA_TO_DEVICE); |
261 | ||
9b00eb49 IS |
262 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
263 | frag = &skb_shinfo(skb)->frags[i]; | |
264 | dma_unmap_page(dev, frag_dma_addr[i], skb_frag_size(frag), | |
265 | DMA_TO_DEVICE); | |
266 | } | |
267 | ||
e3978673 IS |
268 | if (GET_BIT(ET, le64_to_cpu(raw_desc->m3))) { |
269 | mss_index = GET_VAL(MSS, le64_to_cpu(raw_desc->m3)); | |
270 | spin_lock(&pdata->mss_lock); | |
271 | pdata->mss_refcnt[mss_index]--; | |
272 | spin_unlock(&pdata->mss_lock); | |
273 | } | |
274 | ||
e6ad7673 IS |
275 | /* Checking for error */ |
276 | status = GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); | |
277 | if (unlikely(status > 2)) { | |
089f97c7 QN |
278 | cp_ring->tx_dropped++; |
279 | cp_ring->tx_errors++; | |
e6ad7673 IS |
280 | } |
281 | ||
282 | if (likely(skb)) { | |
283 | dev_kfree_skb_any(skb); | |
284 | } else { | |
285 | netdev_err(cp_ring->ndev, "completion skb is NULL\n"); | |
e6ad7673 IS |
286 | } |
287 | ||
089f97c7 | 288 | return 0; |
e6ad7673 IS |
289 | } |
290 | ||
e3978673 IS |
291 | static int xgene_enet_setup_mss(struct net_device *ndev, u32 mss) |
292 | { | |
293 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
1b8c1012 | 294 | int mss_index = -EBUSY; |
e3978673 IS |
295 | int i; |
296 | ||
297 | spin_lock(&pdata->mss_lock); | |
298 | ||
299 | /* Reuse the slot if MSS matches */ | |
1b8c1012 | 300 | for (i = 0; mss_index < 0 && i < NUM_MSS_REG; i++) { |
e3978673 IS |
301 | if (pdata->mss[i] == mss) { |
302 | pdata->mss_refcnt[i]++; | |
303 | mss_index = i; | |
e3978673 IS |
304 | } |
305 | } | |
306 | ||
307 | /* Overwrite the slot with ref_count = 0 */ | |
1b8c1012 | 308 | for (i = 0; mss_index < 0 && i < NUM_MSS_REG; i++) { |
e3978673 IS |
309 | if (!pdata->mss_refcnt[i]) { |
310 | pdata->mss_refcnt[i]++; | |
311 | pdata->mac_ops->set_mss(pdata, mss, i); | |
312 | pdata->mss[i] = mss; | |
313 | mss_index = i; | |
e3978673 IS |
314 | } |
315 | } | |
316 | ||
f006b2c5 | 317 | spin_unlock(&pdata->mss_lock); |
e3978673 IS |
318 | |
319 | return mss_index; | |
320 | } | |
321 | ||
322 | static int xgene_enet_work_msg(struct sk_buff *skb, u64 *hopinfo) | |
e6ad7673 | 323 | { |
9b00eb49 | 324 | struct net_device *ndev = skb->dev; |
e6ad7673 | 325 | struct iphdr *iph; |
9b00eb49 IS |
326 | u8 l3hlen = 0, l4hlen = 0; |
327 | u8 ethhdr, proto = 0, csum_enable = 0; | |
9b00eb49 IS |
328 | u32 hdr_len, mss = 0; |
329 | u32 i, len, nr_frags; | |
e3978673 | 330 | int mss_index; |
9b00eb49 IS |
331 | |
332 | ethhdr = xgene_enet_hdr_len(skb->data); | |
e6ad7673 IS |
333 | |
334 | if (unlikely(skb->protocol != htons(ETH_P_IP)) && | |
335 | unlikely(skb->protocol != htons(ETH_P_8021Q))) | |
336 | goto out; | |
337 | ||
338 | if (unlikely(!(skb->dev->features & NETIF_F_IP_CSUM))) | |
339 | goto out; | |
340 | ||
341 | iph = ip_hdr(skb); | |
342 | if (unlikely(ip_is_fragment(iph))) | |
343 | goto out; | |
344 | ||
345 | if (likely(iph->protocol == IPPROTO_TCP)) { | |
346 | l4hlen = tcp_hdrlen(skb) >> 2; | |
347 | csum_enable = 1; | |
348 | proto = TSO_IPPROTO_TCP; | |
9b00eb49 IS |
349 | if (ndev->features & NETIF_F_TSO) { |
350 | hdr_len = ethhdr + ip_hdrlen(skb) + tcp_hdrlen(skb); | |
351 | mss = skb_shinfo(skb)->gso_size; | |
352 | ||
353 | if (skb_is_nonlinear(skb)) { | |
354 | len = skb_headlen(skb); | |
355 | nr_frags = skb_shinfo(skb)->nr_frags; | |
356 | ||
357 | for (i = 0; i < 2 && i < nr_frags; i++) | |
358 | len += skb_shinfo(skb)->frags[i].size; | |
359 | ||
360 | /* HW requires header must reside in 3 buffer */ | |
361 | if (unlikely(hdr_len > len)) { | |
362 | if (skb_linearize(skb)) | |
363 | return 0; | |
364 | } | |
365 | } | |
366 | ||
367 | if (!mss || ((skb->len - hdr_len) <= mss)) | |
368 | goto out; | |
369 | ||
e3978673 IS |
370 | mss_index = xgene_enet_setup_mss(ndev, mss); |
371 | if (unlikely(mss_index < 0)) | |
372 | return -EBUSY; | |
373 | ||
374 | *hopinfo |= SET_BIT(ET) | SET_VAL(MSS, mss_index); | |
9b00eb49 | 375 | } |
e6ad7673 IS |
376 | } else if (iph->protocol == IPPROTO_UDP) { |
377 | l4hlen = UDP_HDR_SIZE; | |
378 | csum_enable = 1; | |
379 | } | |
380 | out: | |
381 | l3hlen = ip_hdrlen(skb) >> 2; | |
e3978673 IS |
382 | *hopinfo |= SET_VAL(TCPHDR, l4hlen) | |
383 | SET_VAL(IPHDR, l3hlen) | | |
384 | SET_VAL(ETHHDR, ethhdr) | | |
385 | SET_VAL(EC, csum_enable) | | |
386 | SET_VAL(IS, proto) | | |
387 | SET_BIT(IC) | | |
388 | SET_BIT(TYPE_ETH_WORK_MESSAGE); | |
389 | ||
390 | return 0; | |
e6ad7673 IS |
391 | } |
392 | ||
949c40bb IS |
393 | static u16 xgene_enet_encode_len(u16 len) |
394 | { | |
395 | return (len == BUFLEN_16K) ? 0 : len; | |
396 | } | |
397 | ||
9b00eb49 IS |
398 | static void xgene_set_addr_len(__le64 *desc, u32 idx, dma_addr_t addr, u32 len) |
399 | { | |
400 | desc[idx ^ 1] = cpu_to_le64(SET_VAL(DATAADDR, addr) | | |
401 | SET_VAL(BUFDATALEN, len)); | |
402 | } | |
403 | ||
404 | static __le64 *xgene_enet_get_exp_bufs(struct xgene_enet_desc_ring *ring) | |
405 | { | |
406 | __le64 *exp_bufs; | |
407 | ||
408 | exp_bufs = &ring->exp_bufs[ring->exp_buf_tail * MAX_EXP_BUFFS]; | |
409 | memset(exp_bufs, 0, sizeof(__le64) * MAX_EXP_BUFFS); | |
410 | ring->exp_buf_tail = (ring->exp_buf_tail + 1) & ((ring->slots / 2) - 1); | |
411 | ||
412 | return exp_bufs; | |
413 | } | |
414 | ||
415 | static dma_addr_t *xgene_get_frag_dma_array(struct xgene_enet_desc_ring *ring) | |
416 | { | |
417 | return &ring->cp_ring->frag_dma_addr[ring->tail * MAX_SKB_FRAGS]; | |
418 | } | |
419 | ||
e6ad7673 IS |
420 | static int xgene_enet_setup_tx_desc(struct xgene_enet_desc_ring *tx_ring, |
421 | struct sk_buff *skb) | |
422 | { | |
423 | struct device *dev = ndev_to_dev(tx_ring->ndev); | |
67894eec | 424 | struct xgene_enet_pdata *pdata = netdev_priv(tx_ring->ndev); |
e6ad7673 | 425 | struct xgene_enet_raw_desc *raw_desc; |
9b00eb49 IS |
426 | __le64 *exp_desc = NULL, *exp_bufs = NULL; |
427 | dma_addr_t dma_addr, pbuf_addr, *frag_dma_addr; | |
428 | skb_frag_t *frag; | |
e6ad7673 | 429 | u16 tail = tx_ring->tail; |
e3978673 | 430 | u64 hopinfo = 0; |
949c40bb | 431 | u32 len, hw_len; |
9b00eb49 IS |
432 | u8 ll = 0, nv = 0, idx = 0; |
433 | bool split = false; | |
434 | u32 size, offset, ell_bytes = 0; | |
435 | u32 i, fidx, nr_frags, count = 1; | |
e3978673 | 436 | int ret; |
e6ad7673 IS |
437 | |
438 | raw_desc = &tx_ring->raw_desc[tail]; | |
9b00eb49 | 439 | tail = (tail + 1) & (tx_ring->slots - 1); |
e6ad7673 IS |
440 | memset(raw_desc, 0, sizeof(struct xgene_enet_raw_desc)); |
441 | ||
e3978673 IS |
442 | ret = xgene_enet_work_msg(skb, &hopinfo); |
443 | if (ret) | |
444 | return ret; | |
445 | ||
9b00eb49 IS |
446 | raw_desc->m3 = cpu_to_le64(SET_VAL(HENQNUM, tx_ring->dst_ring_num) | |
447 | hopinfo); | |
448 | ||
949c40bb IS |
449 | len = skb_headlen(skb); |
450 | hw_len = xgene_enet_encode_len(len); | |
451 | ||
452 | dma_addr = dma_map_single(dev, skb->data, len, DMA_TO_DEVICE); | |
e6ad7673 IS |
453 | if (dma_mapping_error(dev, dma_addr)) { |
454 | netdev_err(tx_ring->ndev, "DMA mapping error\n"); | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | /* Hardware expects descriptor in little endian format */ | |
e6ad7673 | 459 | raw_desc->m1 = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | |
949c40bb | 460 | SET_VAL(BUFDATALEN, hw_len) | |
e6ad7673 | 461 | SET_BIT(COHERENT)); |
949c40bb | 462 | |
9b00eb49 IS |
463 | if (!skb_is_nonlinear(skb)) |
464 | goto out; | |
e6ad7673 | 465 | |
9b00eb49 IS |
466 | /* scatter gather */ |
467 | nv = 1; | |
468 | exp_desc = (void *)&tx_ring->raw_desc[tail]; | |
949c40bb | 469 | tail = (tail + 1) & (tx_ring->slots - 1); |
9b00eb49 IS |
470 | memset(exp_desc, 0, sizeof(struct xgene_enet_raw_desc)); |
471 | ||
472 | nr_frags = skb_shinfo(skb)->nr_frags; | |
473 | for (i = nr_frags; i < 4 ; i++) | |
474 | exp_desc[i ^ 1] = cpu_to_le64(LAST_BUFFER); | |
475 | ||
476 | frag_dma_addr = xgene_get_frag_dma_array(tx_ring); | |
477 | ||
478 | for (i = 0, fidx = 0; split || (fidx < nr_frags); i++) { | |
479 | if (!split) { | |
480 | frag = &skb_shinfo(skb)->frags[fidx]; | |
481 | size = skb_frag_size(frag); | |
482 | offset = 0; | |
483 | ||
484 | pbuf_addr = skb_frag_dma_map(dev, frag, 0, size, | |
485 | DMA_TO_DEVICE); | |
486 | if (dma_mapping_error(dev, pbuf_addr)) | |
487 | return -EINVAL; | |
488 | ||
489 | frag_dma_addr[fidx] = pbuf_addr; | |
490 | fidx++; | |
491 | ||
492 | if (size > BUFLEN_16K) | |
493 | split = true; | |
494 | } | |
495 | ||
496 | if (size > BUFLEN_16K) { | |
497 | len = BUFLEN_16K; | |
498 | size -= BUFLEN_16K; | |
499 | } else { | |
500 | len = size; | |
501 | split = false; | |
502 | } | |
503 | ||
504 | dma_addr = pbuf_addr + offset; | |
505 | hw_len = xgene_enet_encode_len(len); | |
506 | ||
507 | switch (i) { | |
508 | case 0: | |
509 | case 1: | |
510 | case 2: | |
511 | xgene_set_addr_len(exp_desc, i, dma_addr, hw_len); | |
512 | break; | |
513 | case 3: | |
514 | if (split || (fidx != nr_frags)) { | |
515 | exp_bufs = xgene_enet_get_exp_bufs(tx_ring); | |
516 | xgene_set_addr_len(exp_bufs, idx, dma_addr, | |
517 | hw_len); | |
518 | idx++; | |
519 | ell_bytes += len; | |
520 | } else { | |
521 | xgene_set_addr_len(exp_desc, i, dma_addr, | |
522 | hw_len); | |
523 | } | |
524 | break; | |
525 | default: | |
526 | xgene_set_addr_len(exp_bufs, idx, dma_addr, hw_len); | |
527 | idx++; | |
528 | ell_bytes += len; | |
529 | break; | |
530 | } | |
531 | ||
532 | if (split) | |
533 | offset += BUFLEN_16K; | |
534 | } | |
535 | count++; | |
536 | ||
537 | if (idx) { | |
538 | ll = 1; | |
539 | dma_addr = dma_map_single(dev, exp_bufs, | |
540 | sizeof(u64) * MAX_EXP_BUFFS, | |
541 | DMA_TO_DEVICE); | |
542 | if (dma_mapping_error(dev, dma_addr)) { | |
543 | dev_kfree_skb_any(skb); | |
544 | return -EINVAL; | |
545 | } | |
546 | i = ell_bytes >> LL_BYTES_LSB_LEN; | |
547 | exp_desc[2] = cpu_to_le64(SET_VAL(DATAADDR, dma_addr) | | |
548 | SET_VAL(LL_BYTES_MSB, i) | | |
549 | SET_VAL(LL_LEN, idx)); | |
550 | raw_desc->m2 = cpu_to_le64(SET_VAL(LL_BYTES_LSB, ell_bytes)); | |
551 | } | |
552 | ||
553 | out: | |
554 | raw_desc->m0 = cpu_to_le64(SET_VAL(LL, ll) | SET_VAL(NV, nv) | | |
555 | SET_VAL(USERINFO, tx_ring->tail)); | |
556 | tx_ring->cp_ring->cp_skb[tx_ring->tail] = skb; | |
107dec27 | 557 | pdata->tx_level[tx_ring->cp_ring->index] += count; |
949c40bb IS |
558 | tx_ring->tail = tail; |
559 | ||
560 | return count; | |
e6ad7673 IS |
561 | } |
562 | ||
563 | static netdev_tx_t xgene_enet_start_xmit(struct sk_buff *skb, | |
564 | struct net_device *ndev) | |
565 | { | |
566 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
107dec27 IS |
567 | struct xgene_enet_desc_ring *tx_ring; |
568 | int index = skb->queue_mapping; | |
569 | u32 tx_level = pdata->tx_level[index]; | |
949c40bb | 570 | int count; |
e6ad7673 | 571 | |
107dec27 IS |
572 | tx_ring = pdata->tx_ring[index]; |
573 | if (tx_level < pdata->txc_level[index]) | |
574 | tx_level += ((typeof(pdata->tx_level[index]))~0U); | |
67894eec | 575 | |
107dec27 IS |
576 | if ((tx_level - pdata->txc_level[index]) > pdata->tx_qcnt_hi) { |
577 | netif_stop_subqueue(ndev, index); | |
e6ad7673 IS |
578 | return NETDEV_TX_BUSY; |
579 | } | |
580 | ||
9b00eb49 IS |
581 | if (skb_padto(skb, XGENE_MIN_ENET_FRAME_SIZE)) |
582 | return NETDEV_TX_OK; | |
583 | ||
949c40bb | 584 | count = xgene_enet_setup_tx_desc(tx_ring, skb); |
e3978673 IS |
585 | if (count == -EBUSY) |
586 | return NETDEV_TX_BUSY; | |
587 | ||
949c40bb | 588 | if (count <= 0) { |
e6ad7673 IS |
589 | dev_kfree_skb_any(skb); |
590 | return NETDEV_TX_OK; | |
591 | } | |
592 | ||
e6ad7673 | 593 | skb_tx_timestamp(skb); |
e6ad7673 | 594 | |
3bb502f8 IS |
595 | tx_ring->tx_packets++; |
596 | tx_ring->tx_bytes += skb->len; | |
e6ad7673 | 597 | |
9ffad80a | 598 | pdata->ring_ops->wr_cmd(tx_ring, count); |
e6ad7673 IS |
599 | return NETDEV_TX_OK; |
600 | } | |
601 | ||
0a0400c3 | 602 | static void xgene_enet_rx_csum(struct sk_buff *skb) |
e6ad7673 | 603 | { |
0a0400c3 | 604 | struct net_device *ndev = skb->dev; |
e6ad7673 IS |
605 | struct iphdr *iph = ip_hdr(skb); |
606 | ||
0a0400c3 IS |
607 | if (!(ndev->features & NETIF_F_RXCSUM)) |
608 | return; | |
609 | ||
610 | if (skb->protocol != htons(ETH_P_IP)) | |
611 | return; | |
612 | ||
613 | if (ip_is_fragment(iph)) | |
614 | return; | |
615 | ||
616 | if (iph->protocol != IPPROTO_TCP && iph->protocol != IPPROTO_UDP) | |
617 | return; | |
618 | ||
619 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
e6ad7673 IS |
620 | } |
621 | ||
a9380b0f IS |
622 | static void xgene_enet_free_pagepool(struct xgene_enet_desc_ring *buf_pool, |
623 | struct xgene_enet_raw_desc *raw_desc, | |
624 | struct xgene_enet_raw_desc *exp_desc) | |
625 | { | |
626 | __le64 *desc = (void *)exp_desc; | |
627 | dma_addr_t dma_addr; | |
628 | struct device *dev; | |
629 | struct page *page; | |
630 | u16 slots, head; | |
631 | u32 frag_size; | |
632 | int i; | |
633 | ||
634 | if (!buf_pool || !raw_desc || !exp_desc || | |
635 | (!GET_VAL(NV, le64_to_cpu(raw_desc->m0)))) | |
636 | return; | |
637 | ||
638 | dev = ndev_to_dev(buf_pool->ndev); | |
0b801290 | 639 | slots = buf_pool->slots - 1; |
a9380b0f IS |
640 | head = buf_pool->head; |
641 | ||
642 | for (i = 0; i < 4; i++) { | |
643 | frag_size = xgene_enet_get_data_len(le64_to_cpu(desc[i ^ 1])); | |
644 | if (!frag_size) | |
645 | break; | |
646 | ||
647 | dma_addr = GET_VAL(DATAADDR, le64_to_cpu(desc[i ^ 1])); | |
648 | dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE); | |
649 | ||
650 | page = buf_pool->frag_page[head]; | |
651 | put_page(page); | |
652 | ||
653 | buf_pool->frag_page[head] = NULL; | |
654 | head = (head + 1) & slots; | |
655 | } | |
656 | buf_pool->head = head; | |
657 | } | |
658 | ||
4902a922 IS |
659 | /* Errata 10GE_8 and ENET_11 - allow packet with length <=64B */ |
660 | static bool xgene_enet_errata_10GE_8(struct sk_buff *skb, u32 len, u8 status) | |
661 | { | |
662 | if (status == INGRESS_PKT_LEN && len == ETHER_MIN_PACKET) { | |
663 | if (ntohs(eth_hdr(skb)->h_proto) < 46) | |
664 | return true; | |
665 | } | |
666 | ||
667 | return false; | |
668 | } | |
669 | ||
e6ad7673 | 670 | static int xgene_enet_rx_frame(struct xgene_enet_desc_ring *rx_ring, |
a9380b0f IS |
671 | struct xgene_enet_raw_desc *raw_desc, |
672 | struct xgene_enet_raw_desc *exp_desc) | |
e6ad7673 | 673 | { |
a9380b0f IS |
674 | struct xgene_enet_desc_ring *buf_pool, *page_pool; |
675 | u32 datalen, frag_size, skb_index; | |
4902a922 | 676 | struct xgene_enet_pdata *pdata; |
e6ad7673 | 677 | struct net_device *ndev; |
a9380b0f | 678 | dma_addr_t dma_addr; |
e6ad7673 | 679 | struct sk_buff *skb; |
a9380b0f IS |
680 | struct device *dev; |
681 | struct page *page; | |
682 | u16 slots, head; | |
683 | int i, ret = 0; | |
684 | __le64 *desc; | |
e6ad7673 | 685 | u8 status; |
a9380b0f | 686 | bool nv; |
e6ad7673 IS |
687 | |
688 | ndev = rx_ring->ndev; | |
4902a922 | 689 | pdata = netdev_priv(ndev); |
e6ad7673 IS |
690 | dev = ndev_to_dev(rx_ring->ndev); |
691 | buf_pool = rx_ring->buf_pool; | |
a9380b0f | 692 | page_pool = rx_ring->page_pool; |
e6ad7673 IS |
693 | |
694 | dma_unmap_single(dev, GET_VAL(DATAADDR, le64_to_cpu(raw_desc->m1)), | |
a9380b0f | 695 | XGENE_ENET_STD_MTU, DMA_FROM_DEVICE); |
e6ad7673 IS |
696 | skb_index = GET_VAL(USERINFO, le64_to_cpu(raw_desc->m0)); |
697 | skb = buf_pool->rx_skb[skb_index]; | |
cb11c062 | 698 | buf_pool->rx_skb[skb_index] = NULL; |
e6ad7673 | 699 | |
4902a922 IS |
700 | datalen = xgene_enet_get_data_len(le64_to_cpu(raw_desc->m1)); |
701 | skb_put(skb, datalen); | |
702 | prefetch(skb->data - NET_IP_ALIGN); | |
703 | skb->protocol = eth_type_trans(skb, ndev); | |
704 | ||
e6ad7673 | 705 | /* checking for error */ |
11623fce | 706 | status = (GET_VAL(ELERR, le64_to_cpu(raw_desc->m0)) << LERR_LEN) | |
3bb502f8 | 707 | GET_VAL(LERR, le64_to_cpu(raw_desc->m0)); |
11623fce | 708 | if (unlikely(status)) { |
4902a922 IS |
709 | if (!xgene_enet_errata_10GE_8(skb, datalen, status)) { |
710 | dev_kfree_skb_any(skb); | |
711 | xgene_enet_free_pagepool(page_pool, raw_desc, exp_desc); | |
089f97c7 QN |
712 | xgene_enet_parse_error(rx_ring, status); |
713 | rx_ring->rx_dropped++; | |
4902a922 | 714 | goto out; |
eaef62a4 QN |
715 | } else { |
716 | pdata->false_rflr++; | |
4902a922 | 717 | } |
e6ad7673 IS |
718 | } |
719 | ||
a9380b0f | 720 | nv = GET_VAL(NV, le64_to_cpu(raw_desc->m0)); |
4902a922 IS |
721 | if (!nv) { |
722 | /* strip off CRC as HW isn't doing this */ | |
a9380b0f | 723 | datalen -= 4; |
a9380b0f | 724 | goto skip_jumbo; |
4902a922 | 725 | } |
a9380b0f IS |
726 | |
727 | slots = page_pool->slots - 1; | |
728 | head = page_pool->head; | |
729 | desc = (void *)exp_desc; | |
730 | ||
731 | for (i = 0; i < 4; i++) { | |
732 | frag_size = xgene_enet_get_data_len(le64_to_cpu(desc[i ^ 1])); | |
733 | if (!frag_size) | |
734 | break; | |
735 | ||
736 | dma_addr = GET_VAL(DATAADDR, le64_to_cpu(desc[i ^ 1])); | |
737 | dma_unmap_page(dev, dma_addr, PAGE_SIZE, DMA_FROM_DEVICE); | |
738 | ||
739 | page = page_pool->frag_page[head]; | |
740 | skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, page, 0, | |
741 | frag_size, PAGE_SIZE); | |
742 | ||
743 | datalen += frag_size; | |
744 | ||
745 | page_pool->frag_page[head] = NULL; | |
746 | head = (head + 1) & slots; | |
747 | } | |
748 | ||
749 | page_pool->head = head; | |
750 | rx_ring->npagepool -= skb_shinfo(skb)->nr_frags; | |
e6ad7673 | 751 | |
a9380b0f | 752 | skip_jumbo: |
e6ad7673 | 753 | skb_checksum_none_assert(skb); |
0a0400c3 | 754 | xgene_enet_rx_csum(skb); |
e6ad7673 | 755 | |
3bb502f8 IS |
756 | rx_ring->rx_packets++; |
757 | rx_ring->rx_bytes += datalen; | |
e6ad7673 | 758 | napi_gro_receive(&rx_ring->napi, skb); |
a9380b0f | 759 | |
e6ad7673 | 760 | out: |
a9380b0f IS |
761 | if (rx_ring->npagepool <= 0) { |
762 | ret = xgene_enet_refill_pagepool(page_pool, NUM_NXTBUFPOOL); | |
763 | rx_ring->npagepool = NUM_NXTBUFPOOL; | |
764 | if (ret) | |
765 | return ret; | |
766 | } | |
767 | ||
e6ad7673 IS |
768 | if (--rx_ring->nbufpool == 0) { |
769 | ret = xgene_enet_refill_bufpool(buf_pool, NUM_BUFPOOL); | |
770 | rx_ring->nbufpool = NUM_BUFPOOL; | |
771 | } | |
772 | ||
773 | return ret; | |
774 | } | |
775 | ||
776 | static bool is_rx_desc(struct xgene_enet_raw_desc *raw_desc) | |
777 | { | |
778 | return GET_VAL(FPQNUM, le64_to_cpu(raw_desc->m0)) ? true : false; | |
779 | } | |
780 | ||
781 | static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring, | |
782 | int budget) | |
783 | { | |
107dec27 IS |
784 | struct net_device *ndev = ring->ndev; |
785 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
9b00eb49 | 786 | struct xgene_enet_raw_desc *raw_desc, *exp_desc; |
e6ad7673 IS |
787 | u16 head = ring->head; |
788 | u16 slots = ring->slots - 1; | |
67894eec IS |
789 | int ret, desc_count, count = 0, processed = 0; |
790 | bool is_completion; | |
e6ad7673 IS |
791 | |
792 | do { | |
793 | raw_desc = &ring->raw_desc[head]; | |
67894eec IS |
794 | desc_count = 0; |
795 | is_completion = false; | |
9b00eb49 | 796 | exp_desc = NULL; |
e6ad7673 IS |
797 | if (unlikely(xgene_enet_is_desc_slot_empty(raw_desc))) |
798 | break; | |
799 | ||
ecf6ba83 IS |
800 | /* read fpqnum field after dataaddr field */ |
801 | dma_rmb(); | |
9b00eb49 IS |
802 | if (GET_BIT(NV, le64_to_cpu(raw_desc->m0))) { |
803 | head = (head + 1) & slots; | |
804 | exp_desc = &ring->raw_desc[head]; | |
805 | ||
806 | if (unlikely(xgene_enet_is_desc_slot_empty(exp_desc))) { | |
807 | head = (head - 1) & slots; | |
808 | break; | |
809 | } | |
810 | dma_rmb(); | |
811 | count++; | |
67894eec | 812 | desc_count++; |
9b00eb49 | 813 | } |
67894eec | 814 | if (is_rx_desc(raw_desc)) { |
a9380b0f | 815 | ret = xgene_enet_rx_frame(ring, raw_desc, exp_desc); |
67894eec | 816 | } else { |
e6ad7673 | 817 | ret = xgene_enet_tx_completion(ring, raw_desc); |
67894eec IS |
818 | is_completion = true; |
819 | } | |
e6ad7673 | 820 | xgene_enet_mark_desc_slot_empty(raw_desc); |
9b00eb49 IS |
821 | if (exp_desc) |
822 | xgene_enet_mark_desc_slot_empty(exp_desc); | |
e6ad7673 IS |
823 | |
824 | head = (head + 1) & slots; | |
825 | count++; | |
67894eec | 826 | desc_count++; |
9b00eb49 | 827 | processed++; |
67894eec | 828 | if (is_completion) |
107dec27 | 829 | pdata->txc_level[ring->index] += desc_count; |
e6ad7673 IS |
830 | |
831 | if (ret) | |
832 | break; | |
833 | } while (--budget); | |
834 | ||
835 | if (likely(count)) { | |
81cefb81 | 836 | pdata->ring_ops->wr_cmd(ring, -count); |
e6ad7673 IS |
837 | ring->head = head; |
838 | ||
107dec27 IS |
839 | if (__netif_subqueue_stopped(ndev, ring->index)) |
840 | netif_start_subqueue(ndev, ring->index); | |
e6ad7673 IS |
841 | } |
842 | ||
9b00eb49 | 843 | return processed; |
e6ad7673 IS |
844 | } |
845 | ||
846 | static int xgene_enet_napi(struct napi_struct *napi, const int budget) | |
847 | { | |
848 | struct xgene_enet_desc_ring *ring; | |
849 | int processed; | |
850 | ||
851 | ring = container_of(napi, struct xgene_enet_desc_ring, napi); | |
852 | processed = xgene_enet_process_ring(ring, budget); | |
853 | ||
854 | if (processed != budget) { | |
6ad20165 | 855 | napi_complete_done(napi, processed); |
e6ad7673 IS |
856 | enable_irq(ring->irq); |
857 | } | |
858 | ||
859 | return processed; | |
860 | } | |
861 | ||
862 | static void xgene_enet_timeout(struct net_device *ndev) | |
863 | { | |
864 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
107dec27 IS |
865 | struct netdev_queue *txq; |
866 | int i; | |
e6ad7673 | 867 | |
d0eb7458 | 868 | pdata->mac_ops->reset(pdata); |
107dec27 IS |
869 | |
870 | for (i = 0; i < pdata->txq_cnt; i++) { | |
871 | txq = netdev_get_tx_queue(ndev, i); | |
872 | txq->trans_start = jiffies; | |
873 | netif_tx_start_queue(txq); | |
874 | } | |
e6ad7673 IS |
875 | } |
876 | ||
cb0366b7 IS |
877 | static void xgene_enet_set_irq_name(struct net_device *ndev) |
878 | { | |
879 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
880 | struct xgene_enet_desc_ring *ring; | |
881 | int i; | |
882 | ||
883 | for (i = 0; i < pdata->rxq_cnt; i++) { | |
884 | ring = pdata->rx_ring[i]; | |
885 | if (!pdata->cq_cnt) { | |
886 | snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-rx-txc", | |
887 | ndev->name); | |
888 | } else { | |
889 | snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-rx-%d", | |
890 | ndev->name, i); | |
891 | } | |
892 | } | |
893 | ||
894 | for (i = 0; i < pdata->cq_cnt; i++) { | |
895 | ring = pdata->tx_ring[i]->cp_ring; | |
896 | snprintf(ring->irq_name, IRQ_ID_SIZE, "%s-txc-%d", | |
897 | ndev->name, i); | |
898 | } | |
899 | } | |
900 | ||
e6ad7673 IS |
901 | static int xgene_enet_register_irq(struct net_device *ndev) |
902 | { | |
903 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
904 | struct device *dev = ndev_to_dev(ndev); | |
6772b653 | 905 | struct xgene_enet_desc_ring *ring; |
107dec27 | 906 | int ret = 0, i; |
e6ad7673 | 907 | |
cb0366b7 | 908 | xgene_enet_set_irq_name(ndev); |
107dec27 IS |
909 | for (i = 0; i < pdata->rxq_cnt; i++) { |
910 | ring = pdata->rx_ring[i]; | |
911 | irq_set_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); | |
912 | ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, | |
46a22d29 | 913 | 0, ring->irq_name, ring); |
107dec27 IS |
914 | if (ret) { |
915 | netdev_err(ndev, "Failed to request irq %s\n", | |
916 | ring->irq_name); | |
917 | } | |
918 | } | |
6772b653 | 919 | |
107dec27 IS |
920 | for (i = 0; i < pdata->cq_cnt; i++) { |
921 | ring = pdata->tx_ring[i]->cp_ring; | |
b5d7a069 | 922 | irq_set_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); |
6772b653 | 923 | ret = devm_request_irq(dev, ring->irq, xgene_enet_rx_irq, |
46a22d29 | 924 | 0, ring->irq_name, ring); |
6772b653 IS |
925 | if (ret) { |
926 | netdev_err(ndev, "Failed to request irq %s\n", | |
927 | ring->irq_name); | |
928 | } | |
e6ad7673 IS |
929 | } |
930 | ||
931 | return ret; | |
932 | } | |
933 | ||
934 | static void xgene_enet_free_irq(struct net_device *ndev) | |
935 | { | |
936 | struct xgene_enet_pdata *pdata; | |
b5d7a069 | 937 | struct xgene_enet_desc_ring *ring; |
e6ad7673 | 938 | struct device *dev; |
107dec27 | 939 | int i; |
e6ad7673 IS |
940 | |
941 | pdata = netdev_priv(ndev); | |
942 | dev = ndev_to_dev(ndev); | |
6772b653 | 943 | |
107dec27 IS |
944 | for (i = 0; i < pdata->rxq_cnt; i++) { |
945 | ring = pdata->rx_ring[i]; | |
946 | irq_clear_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); | |
947 | devm_free_irq(dev, ring->irq, ring); | |
948 | } | |
949 | ||
950 | for (i = 0; i < pdata->cq_cnt; i++) { | |
951 | ring = pdata->tx_ring[i]->cp_ring; | |
b5d7a069 IS |
952 | irq_clear_status_flags(ring->irq, IRQ_DISABLE_UNLAZY); |
953 | devm_free_irq(dev, ring->irq, ring); | |
6772b653 IS |
954 | } |
955 | } | |
956 | ||
957 | static void xgene_enet_napi_enable(struct xgene_enet_pdata *pdata) | |
958 | { | |
959 | struct napi_struct *napi; | |
107dec27 | 960 | int i; |
6772b653 | 961 | |
107dec27 IS |
962 | for (i = 0; i < pdata->rxq_cnt; i++) { |
963 | napi = &pdata->rx_ring[i]->napi; | |
964 | napi_enable(napi); | |
965 | } | |
6772b653 | 966 | |
107dec27 IS |
967 | for (i = 0; i < pdata->cq_cnt; i++) { |
968 | napi = &pdata->tx_ring[i]->cp_ring->napi; | |
6772b653 IS |
969 | napi_enable(napi); |
970 | } | |
971 | } | |
972 | ||
973 | static void xgene_enet_napi_disable(struct xgene_enet_pdata *pdata) | |
974 | { | |
975 | struct napi_struct *napi; | |
107dec27 | 976 | int i; |
6772b653 | 977 | |
107dec27 IS |
978 | for (i = 0; i < pdata->rxq_cnt; i++) { |
979 | napi = &pdata->rx_ring[i]->napi; | |
980 | napi_disable(napi); | |
981 | } | |
6772b653 | 982 | |
107dec27 IS |
983 | for (i = 0; i < pdata->cq_cnt; i++) { |
984 | napi = &pdata->tx_ring[i]->cp_ring->napi; | |
6772b653 IS |
985 | napi_disable(napi); |
986 | } | |
e6ad7673 IS |
987 | } |
988 | ||
989 | static int xgene_enet_open(struct net_device *ndev) | |
990 | { | |
991 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
3cdb7309 | 992 | const struct xgene_mac_ops *mac_ops = pdata->mac_ops; |
e6ad7673 IS |
993 | int ret; |
994 | ||
107dec27 IS |
995 | ret = netif_set_real_num_tx_queues(ndev, pdata->txq_cnt); |
996 | if (ret) | |
997 | return ret; | |
998 | ||
999 | ret = netif_set_real_num_rx_queues(ndev, pdata->rxq_cnt); | |
1000 | if (ret) | |
1001 | return ret; | |
1002 | ||
aeb20b6b | 1003 | xgene_enet_napi_enable(pdata); |
e6ad7673 IS |
1004 | ret = xgene_enet_register_irq(ndev); |
1005 | if (ret) | |
1006 | return ret; | |
e6ad7673 | 1007 | |
971d3a44 PR |
1008 | if (ndev->phydev) { |
1009 | phy_start(ndev->phydev); | |
47c62b6d | 1010 | } else { |
0148d38d | 1011 | schedule_delayed_work(&pdata->link_work, PHY_POLL_LINK_OFF); |
9a8c5dde IS |
1012 | netif_carrier_off(ndev); |
1013 | } | |
e6ad7673 | 1014 | |
cb11c062 IS |
1015 | mac_ops->tx_enable(pdata); |
1016 | mac_ops->rx_enable(pdata); | |
cb0366b7 | 1017 | netif_tx_start_all_queues(ndev); |
e6ad7673 IS |
1018 | |
1019 | return ret; | |
1020 | } | |
1021 | ||
1022 | static int xgene_enet_close(struct net_device *ndev) | |
1023 | { | |
1024 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
3cdb7309 | 1025 | const struct xgene_mac_ops *mac_ops = pdata->mac_ops; |
107dec27 | 1026 | int i; |
e6ad7673 | 1027 | |
cb0366b7 | 1028 | netif_tx_stop_all_queues(ndev); |
cb11c062 IS |
1029 | mac_ops->tx_disable(pdata); |
1030 | mac_ops->rx_disable(pdata); | |
e6ad7673 | 1031 | |
971d3a44 PR |
1032 | if (ndev->phydev) |
1033 | phy_stop(ndev->phydev); | |
0148d38d IS |
1034 | else |
1035 | cancel_delayed_work_sync(&pdata->link_work); | |
e6ad7673 | 1036 | |
aeb20b6b IS |
1037 | xgene_enet_free_irq(ndev); |
1038 | xgene_enet_napi_disable(pdata); | |
107dec27 IS |
1039 | for (i = 0; i < pdata->rxq_cnt; i++) |
1040 | xgene_enet_process_ring(pdata->rx_ring[i], -1); | |
aeb20b6b | 1041 | |
e6ad7673 IS |
1042 | return 0; |
1043 | } | |
e6ad7673 IS |
1044 | static void xgene_enet_delete_ring(struct xgene_enet_desc_ring *ring) |
1045 | { | |
1046 | struct xgene_enet_pdata *pdata; | |
1047 | struct device *dev; | |
1048 | ||
1049 | pdata = netdev_priv(ring->ndev); | |
1050 | dev = ndev_to_dev(ring->ndev); | |
1051 | ||
81cefb81 | 1052 | pdata->ring_ops->clear(ring); |
cb0366b7 | 1053 | dmam_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); |
e6ad7673 IS |
1054 | } |
1055 | ||
1056 | static void xgene_enet_delete_desc_rings(struct xgene_enet_pdata *pdata) | |
1057 | { | |
a9380b0f | 1058 | struct xgene_enet_desc_ring *buf_pool, *page_pool; |
107dec27 IS |
1059 | struct xgene_enet_desc_ring *ring; |
1060 | int i; | |
e6ad7673 | 1061 | |
107dec27 IS |
1062 | for (i = 0; i < pdata->txq_cnt; i++) { |
1063 | ring = pdata->tx_ring[i]; | |
1064 | if (ring) { | |
1065 | xgene_enet_delete_ring(ring); | |
cb11c062 IS |
1066 | pdata->port_ops->clear(pdata, ring); |
1067 | if (pdata->cq_cnt) | |
1068 | xgene_enet_delete_ring(ring->cp_ring); | |
107dec27 IS |
1069 | pdata->tx_ring[i] = NULL; |
1070 | } | |
a9380b0f | 1071 | |
e6ad7673 IS |
1072 | } |
1073 | ||
107dec27 IS |
1074 | for (i = 0; i < pdata->rxq_cnt; i++) { |
1075 | ring = pdata->rx_ring[i]; | |
1076 | if (ring) { | |
a9380b0f IS |
1077 | page_pool = ring->page_pool; |
1078 | if (page_pool) { | |
1079 | xgene_enet_delete_pagepool(page_pool); | |
1080 | xgene_enet_delete_ring(page_pool); | |
1081 | pdata->port_ops->clear(pdata, page_pool); | |
1082 | } | |
1083 | ||
107dec27 IS |
1084 | buf_pool = ring->buf_pool; |
1085 | xgene_enet_delete_bufpool(buf_pool); | |
1086 | xgene_enet_delete_ring(buf_pool); | |
cb11c062 | 1087 | pdata->port_ops->clear(pdata, buf_pool); |
a9380b0f | 1088 | |
107dec27 IS |
1089 | xgene_enet_delete_ring(ring); |
1090 | pdata->rx_ring[i] = NULL; | |
1091 | } | |
a9380b0f | 1092 | |
e6ad7673 IS |
1093 | } |
1094 | } | |
1095 | ||
1096 | static int xgene_enet_get_ring_size(struct device *dev, | |
1097 | enum xgene_enet_ring_cfgsize cfgsize) | |
1098 | { | |
1099 | int size = -EINVAL; | |
1100 | ||
1101 | switch (cfgsize) { | |
1102 | case RING_CFGSIZE_512B: | |
1103 | size = 0x200; | |
1104 | break; | |
1105 | case RING_CFGSIZE_2KB: | |
1106 | size = 0x800; | |
1107 | break; | |
1108 | case RING_CFGSIZE_16KB: | |
1109 | size = 0x4000; | |
1110 | break; | |
1111 | case RING_CFGSIZE_64KB: | |
1112 | size = 0x10000; | |
1113 | break; | |
1114 | case RING_CFGSIZE_512KB: | |
1115 | size = 0x80000; | |
1116 | break; | |
1117 | default: | |
1118 | dev_err(dev, "Unsupported cfg ring size %d\n", cfgsize); | |
1119 | break; | |
1120 | } | |
1121 | ||
1122 | return size; | |
1123 | } | |
1124 | ||
1125 | static void xgene_enet_free_desc_ring(struct xgene_enet_desc_ring *ring) | |
1126 | { | |
81cefb81 | 1127 | struct xgene_enet_pdata *pdata; |
e6ad7673 IS |
1128 | struct device *dev; |
1129 | ||
1130 | if (!ring) | |
1131 | return; | |
1132 | ||
1133 | dev = ndev_to_dev(ring->ndev); | |
81cefb81 | 1134 | pdata = netdev_priv(ring->ndev); |
e6ad7673 IS |
1135 | |
1136 | if (ring->desc_addr) { | |
81cefb81 | 1137 | pdata->ring_ops->clear(ring); |
cb0366b7 | 1138 | dmam_free_coherent(dev, ring->size, ring->desc_addr, ring->dma); |
e6ad7673 IS |
1139 | } |
1140 | devm_kfree(dev, ring); | |
1141 | } | |
1142 | ||
1143 | static void xgene_enet_free_desc_rings(struct xgene_enet_pdata *pdata) | |
1144 | { | |
a9380b0f | 1145 | struct xgene_enet_desc_ring *page_pool; |
e6ad7673 IS |
1146 | struct device *dev = &pdata->pdev->dev; |
1147 | struct xgene_enet_desc_ring *ring; | |
a9380b0f | 1148 | void *p; |
107dec27 | 1149 | int i; |
e6ad7673 | 1150 | |
107dec27 IS |
1151 | for (i = 0; i < pdata->txq_cnt; i++) { |
1152 | ring = pdata->tx_ring[i]; | |
1153 | if (ring) { | |
1154 | if (ring->cp_ring && ring->cp_ring->cp_skb) | |
1155 | devm_kfree(dev, ring->cp_ring->cp_skb); | |
a9380b0f | 1156 | |
107dec27 IS |
1157 | if (ring->cp_ring && pdata->cq_cnt) |
1158 | xgene_enet_free_desc_ring(ring->cp_ring); | |
a9380b0f | 1159 | |
107dec27 IS |
1160 | xgene_enet_free_desc_ring(ring); |
1161 | } | |
a9380b0f | 1162 | |
107dec27 IS |
1163 | } |
1164 | ||
1165 | for (i = 0; i < pdata->rxq_cnt; i++) { | |
1166 | ring = pdata->rx_ring[i]; | |
1167 | if (ring) { | |
1168 | if (ring->buf_pool) { | |
1169 | if (ring->buf_pool->rx_skb) | |
1170 | devm_kfree(dev, ring->buf_pool->rx_skb); | |
a9380b0f | 1171 | |
107dec27 IS |
1172 | xgene_enet_free_desc_ring(ring->buf_pool); |
1173 | } | |
a9380b0f IS |
1174 | |
1175 | page_pool = ring->page_pool; | |
1176 | if (page_pool) { | |
1177 | p = page_pool->frag_page; | |
1178 | if (p) | |
1179 | devm_kfree(dev, p); | |
1180 | ||
1181 | p = page_pool->frag_dma_addr; | |
1182 | if (p) | |
1183 | devm_kfree(dev, p); | |
1184 | } | |
1185 | ||
107dec27 | 1186 | xgene_enet_free_desc_ring(ring); |
c10e4caf | 1187 | } |
c10e4caf | 1188 | } |
e6ad7673 IS |
1189 | } |
1190 | ||
bc1b7c13 IS |
1191 | static bool is_irq_mbox_required(struct xgene_enet_pdata *pdata, |
1192 | struct xgene_enet_desc_ring *ring) | |
1193 | { | |
1194 | if ((pdata->enet_id == XGENE_ENET2) && | |
1195 | (xgene_enet_ring_owner(ring->id) == RING_OWNER_CPU)) { | |
1196 | return true; | |
1197 | } | |
1198 | ||
1199 | return false; | |
1200 | } | |
1201 | ||
1202 | static void __iomem *xgene_enet_ring_cmd_base(struct xgene_enet_pdata *pdata, | |
1203 | struct xgene_enet_desc_ring *ring) | |
1204 | { | |
1205 | u8 num_ring_id_shift = pdata->ring_ops->num_ring_id_shift; | |
1206 | ||
1207 | return pdata->ring_cmd_addr + (ring->num << num_ring_id_shift); | |
1208 | } | |
1209 | ||
e6ad7673 IS |
1210 | static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring( |
1211 | struct net_device *ndev, u32 ring_num, | |
1212 | enum xgene_enet_ring_cfgsize cfgsize, u32 ring_id) | |
1213 | { | |
e6ad7673 IS |
1214 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
1215 | struct device *dev = ndev_to_dev(ndev); | |
cb0366b7 IS |
1216 | struct xgene_enet_desc_ring *ring; |
1217 | void *irq_mbox_addr; | |
9b9ba821 TK |
1218 | int size; |
1219 | ||
1220 | size = xgene_enet_get_ring_size(dev, cfgsize); | |
1221 | if (size < 0) | |
1222 | return NULL; | |
e6ad7673 IS |
1223 | |
1224 | ring = devm_kzalloc(dev, sizeof(struct xgene_enet_desc_ring), | |
1225 | GFP_KERNEL); | |
1226 | if (!ring) | |
1227 | return NULL; | |
1228 | ||
1229 | ring->ndev = ndev; | |
1230 | ring->num = ring_num; | |
1231 | ring->cfgsize = cfgsize; | |
1232 | ring->id = ring_id; | |
1233 | ||
cb0366b7 IS |
1234 | ring->desc_addr = dmam_alloc_coherent(dev, size, &ring->dma, |
1235 | GFP_KERNEL | __GFP_ZERO); | |
e6ad7673 IS |
1236 | if (!ring->desc_addr) { |
1237 | devm_kfree(dev, ring); | |
1238 | return NULL; | |
1239 | } | |
1240 | ring->size = size; | |
1241 | ||
bc1b7c13 | 1242 | if (is_irq_mbox_required(pdata, ring)) { |
cb0366b7 IS |
1243 | irq_mbox_addr = dmam_alloc_coherent(dev, INTR_MBOX_SIZE, |
1244 | &ring->irq_mbox_dma, | |
1245 | GFP_KERNEL | __GFP_ZERO); | |
1246 | if (!irq_mbox_addr) { | |
1247 | dmam_free_coherent(dev, size, ring->desc_addr, | |
1248 | ring->dma); | |
bc1b7c13 IS |
1249 | devm_kfree(dev, ring); |
1250 | return NULL; | |
1251 | } | |
cb0366b7 | 1252 | ring->irq_mbox_addr = irq_mbox_addr; |
bc1b7c13 IS |
1253 | } |
1254 | ||
1255 | ring->cmd_base = xgene_enet_ring_cmd_base(pdata, ring); | |
e6ad7673 | 1256 | ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR; |
81cefb81 | 1257 | ring = pdata->ring_ops->setup(ring); |
e6ad7673 IS |
1258 | netdev_dbg(ndev, "ring info: num=%d size=%d id=%d slots=%d\n", |
1259 | ring->num, ring->size, ring->id, ring->slots); | |
1260 | ||
1261 | return ring; | |
1262 | } | |
1263 | ||
1264 | static u16 xgene_enet_get_ring_id(enum xgene_ring_owner owner, u8 bufnum) | |
1265 | { | |
1266 | return (owner << 6) | (bufnum & GENMASK(5, 0)); | |
1267 | } | |
1268 | ||
bc1b7c13 IS |
1269 | static enum xgene_ring_owner xgene_derive_ring_owner(struct xgene_enet_pdata *p) |
1270 | { | |
1271 | enum xgene_ring_owner owner; | |
1272 | ||
1273 | if (p->enet_id == XGENE_ENET1) { | |
1274 | switch (p->phy_mode) { | |
1275 | case PHY_INTERFACE_MODE_SGMII: | |
1276 | owner = RING_OWNER_ETH0; | |
1277 | break; | |
1278 | default: | |
1279 | owner = (!p->port_id) ? RING_OWNER_ETH0 : | |
1280 | RING_OWNER_ETH1; | |
1281 | break; | |
1282 | } | |
1283 | } else { | |
1284 | owner = (!p->port_id) ? RING_OWNER_ETH0 : RING_OWNER_ETH1; | |
1285 | } | |
1286 | ||
1287 | return owner; | |
1288 | } | |
1289 | ||
2a37daa6 IS |
1290 | static u8 xgene_start_cpu_bufnum(struct xgene_enet_pdata *pdata) |
1291 | { | |
1292 | struct device *dev = &pdata->pdev->dev; | |
1293 | u32 cpu_bufnum; | |
1294 | int ret; | |
1295 | ||
1296 | ret = device_property_read_u32(dev, "channel", &cpu_bufnum); | |
1297 | ||
1298 | return (!ret) ? cpu_bufnum : pdata->cpu_bufnum; | |
1299 | } | |
1300 | ||
e6ad7673 IS |
1301 | static int xgene_enet_create_desc_rings(struct net_device *ndev) |
1302 | { | |
e6ad7673 | 1303 | struct xgene_enet_desc_ring *rx_ring, *tx_ring, *cp_ring; |
a9380b0f IS |
1304 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); |
1305 | struct xgene_enet_desc_ring *page_pool = NULL; | |
e6ad7673 | 1306 | struct xgene_enet_desc_ring *buf_pool = NULL; |
a9380b0f | 1307 | struct device *dev = ndev_to_dev(ndev); |
ca626454 KC |
1308 | u8 eth_bufnum = pdata->eth_bufnum; |
1309 | u8 bp_bufnum = pdata->bp_bufnum; | |
1310 | u16 ring_num = pdata->ring_num; | |
a9380b0f IS |
1311 | enum xgene_ring_owner owner; |
1312 | dma_addr_t dma_exp_bufs; | |
1313 | u16 ring_id, slots; | |
cb0366b7 | 1314 | __le64 *exp_bufs; |
107dec27 | 1315 | int i, ret, size; |
a9380b0f | 1316 | u8 cpu_bufnum; |
e6ad7673 | 1317 | |
2a37daa6 IS |
1318 | cpu_bufnum = xgene_start_cpu_bufnum(pdata); |
1319 | ||
107dec27 IS |
1320 | for (i = 0; i < pdata->rxq_cnt; i++) { |
1321 | /* allocate rx descriptor ring */ | |
1322 | owner = xgene_derive_ring_owner(pdata); | |
1323 | ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, cpu_bufnum++); | |
1324 | rx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, | |
1325 | RING_CFGSIZE_16KB, | |
1326 | ring_id); | |
1327 | if (!rx_ring) { | |
1328 | ret = -ENOMEM; | |
1329 | goto err; | |
1330 | } | |
e6ad7673 | 1331 | |
107dec27 IS |
1332 | /* allocate buffer pool for receiving packets */ |
1333 | owner = xgene_derive_ring_owner(pdata); | |
1334 | ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++); | |
1335 | buf_pool = xgene_enet_create_desc_ring(ndev, ring_num++, | |
a9380b0f | 1336 | RING_CFGSIZE_16KB, |
107dec27 IS |
1337 | ring_id); |
1338 | if (!buf_pool) { | |
1339 | ret = -ENOMEM; | |
1340 | goto err; | |
1341 | } | |
9b00eb49 | 1342 | |
107dec27 | 1343 | rx_ring->nbufpool = NUM_BUFPOOL; |
a9380b0f | 1344 | rx_ring->npagepool = NUM_NXTBUFPOOL; |
107dec27 | 1345 | rx_ring->irq = pdata->irqs[i]; |
107dec27 IS |
1346 | buf_pool->rx_skb = devm_kcalloc(dev, buf_pool->slots, |
1347 | sizeof(struct sk_buff *), | |
9b00eb49 | 1348 | GFP_KERNEL); |
107dec27 IS |
1349 | if (!buf_pool->rx_skb) { |
1350 | ret = -ENOMEM; | |
1351 | goto err; | |
1352 | } | |
9b00eb49 | 1353 | |
107dec27 IS |
1354 | buf_pool->dst_ring_num = xgene_enet_dst_ring_num(buf_pool); |
1355 | rx_ring->buf_pool = buf_pool; | |
1356 | pdata->rx_ring[i] = rx_ring; | |
a9380b0f IS |
1357 | |
1358 | if ((pdata->enet_id == XGENE_ENET1 && pdata->rxq_cnt > 4) || | |
1359 | (pdata->enet_id == XGENE_ENET2 && pdata->rxq_cnt > 16)) { | |
1360 | break; | |
1361 | } | |
1362 | ||
1363 | /* allocate next buffer pool for jumbo packets */ | |
1364 | owner = xgene_derive_ring_owner(pdata); | |
1365 | ring_id = xgene_enet_get_ring_id(owner, bp_bufnum++); | |
1366 | page_pool = xgene_enet_create_desc_ring(ndev, ring_num++, | |
1367 | RING_CFGSIZE_16KB, | |
1368 | ring_id); | |
1369 | if (!page_pool) { | |
1370 | ret = -ENOMEM; | |
1371 | goto err; | |
1372 | } | |
1373 | ||
1374 | slots = page_pool->slots; | |
1375 | page_pool->frag_page = devm_kcalloc(dev, slots, | |
1376 | sizeof(struct page *), | |
1377 | GFP_KERNEL); | |
1378 | if (!page_pool->frag_page) { | |
1379 | ret = -ENOMEM; | |
1380 | goto err; | |
1381 | } | |
1382 | ||
1383 | page_pool->frag_dma_addr = devm_kcalloc(dev, slots, | |
1384 | sizeof(dma_addr_t), | |
1385 | GFP_KERNEL); | |
1386 | if (!page_pool->frag_dma_addr) { | |
1387 | ret = -ENOMEM; | |
1388 | goto err; | |
1389 | } | |
1390 | ||
1391 | page_pool->dst_ring_num = xgene_enet_dst_ring_num(page_pool); | |
1392 | rx_ring->page_pool = page_pool; | |
107dec27 | 1393 | } |
e6ad7673 | 1394 | |
107dec27 IS |
1395 | for (i = 0; i < pdata->txq_cnt; i++) { |
1396 | /* allocate tx descriptor ring */ | |
1397 | owner = xgene_derive_ring_owner(pdata); | |
1398 | ring_id = xgene_enet_get_ring_id(owner, eth_bufnum++); | |
1399 | tx_ring = xgene_enet_create_desc_ring(ndev, ring_num++, | |
6772b653 IS |
1400 | RING_CFGSIZE_16KB, |
1401 | ring_id); | |
107dec27 | 1402 | if (!tx_ring) { |
6772b653 IS |
1403 | ret = -ENOMEM; |
1404 | goto err; | |
1405 | } | |
6772b653 | 1406 | |
107dec27 | 1407 | size = (tx_ring->slots / 2) * sizeof(__le64) * MAX_EXP_BUFFS; |
cb0366b7 IS |
1408 | exp_bufs = dmam_alloc_coherent(dev, size, &dma_exp_bufs, |
1409 | GFP_KERNEL | __GFP_ZERO); | |
1410 | if (!exp_bufs) { | |
107dec27 IS |
1411 | ret = -ENOMEM; |
1412 | goto err; | |
1413 | } | |
cb0366b7 | 1414 | tx_ring->exp_bufs = exp_bufs; |
9b00eb49 | 1415 | |
107dec27 IS |
1416 | pdata->tx_ring[i] = tx_ring; |
1417 | ||
1418 | if (!pdata->cq_cnt) { | |
1419 | cp_ring = pdata->rx_ring[i]; | |
1420 | } else { | |
1421 | /* allocate tx completion descriptor ring */ | |
1422 | ring_id = xgene_enet_get_ring_id(RING_OWNER_CPU, | |
1423 | cpu_bufnum++); | |
1424 | cp_ring = xgene_enet_create_desc_ring(ndev, ring_num++, | |
1425 | RING_CFGSIZE_16KB, | |
1426 | ring_id); | |
1427 | if (!cp_ring) { | |
1428 | ret = -ENOMEM; | |
1429 | goto err; | |
1430 | } | |
9b00eb49 | 1431 | |
107dec27 IS |
1432 | cp_ring->irq = pdata->irqs[pdata->rxq_cnt + i]; |
1433 | cp_ring->index = i; | |
107dec27 IS |
1434 | } |
1435 | ||
1436 | cp_ring->cp_skb = devm_kcalloc(dev, tx_ring->slots, | |
1437 | sizeof(struct sk_buff *), | |
1438 | GFP_KERNEL); | |
1439 | if (!cp_ring->cp_skb) { | |
1440 | ret = -ENOMEM; | |
1441 | goto err; | |
1442 | } | |
e6ad7673 | 1443 | |
107dec27 IS |
1444 | size = sizeof(dma_addr_t) * MAX_SKB_FRAGS; |
1445 | cp_ring->frag_dma_addr = devm_kcalloc(dev, tx_ring->slots, | |
1446 | size, GFP_KERNEL); | |
1447 | if (!cp_ring->frag_dma_addr) { | |
1448 | devm_kfree(dev, cp_ring->cp_skb); | |
1449 | ret = -ENOMEM; | |
1450 | goto err; | |
1451 | } | |
1452 | ||
1453 | tx_ring->cp_ring = cp_ring; | |
1454 | tx_ring->dst_ring_num = xgene_enet_dst_ring_num(cp_ring); | |
1455 | } | |
1456 | ||
b5a4a3eb IS |
1457 | if (pdata->ring_ops->coalesce) |
1458 | pdata->ring_ops->coalesce(pdata->tx_ring[0]); | |
107dec27 | 1459 | pdata->tx_qcnt_hi = pdata->tx_ring[0]->slots - 128; |
e6ad7673 IS |
1460 | |
1461 | return 0; | |
1462 | ||
1463 | err: | |
1464 | xgene_enet_free_desc_rings(pdata); | |
1465 | return ret; | |
1466 | } | |
1467 | ||
bc1f4470 | 1468 | static void xgene_enet_get_stats64( |
e6ad7673 | 1469 | struct net_device *ndev, |
3f5a2ef1 | 1470 | struct rtnl_link_stats64 *stats) |
e6ad7673 IS |
1471 | { |
1472 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
3bb502f8 IS |
1473 | struct xgene_enet_desc_ring *ring; |
1474 | int i; | |
e6ad7673 | 1475 | |
3bb502f8 IS |
1476 | for (i = 0; i < pdata->txq_cnt; i++) { |
1477 | ring = pdata->tx_ring[i]; | |
1478 | if (ring) { | |
1479 | stats->tx_packets += ring->tx_packets; | |
1480 | stats->tx_bytes += ring->tx_bytes; | |
089f97c7 QN |
1481 | stats->tx_dropped += ring->tx_dropped; |
1482 | stats->tx_errors += ring->tx_errors; | |
3bb502f8 IS |
1483 | } |
1484 | } | |
e6ad7673 | 1485 | |
3bb502f8 IS |
1486 | for (i = 0; i < pdata->rxq_cnt; i++) { |
1487 | ring = pdata->rx_ring[i]; | |
1488 | if (ring) { | |
1489 | stats->rx_packets += ring->rx_packets; | |
1490 | stats->rx_bytes += ring->rx_bytes; | |
089f97c7 QN |
1491 | stats->rx_dropped += ring->rx_dropped; |
1492 | stats->rx_errors += ring->rx_errors + | |
1493 | ring->rx_length_errors + | |
3bb502f8 IS |
1494 | ring->rx_crc_errors + |
1495 | ring->rx_frame_errors + | |
1496 | ring->rx_fifo_errors; | |
089f97c7 QN |
1497 | stats->rx_length_errors += ring->rx_length_errors; |
1498 | stats->rx_crc_errors += ring->rx_crc_errors; | |
1499 | stats->rx_frame_errors += ring->rx_frame_errors; | |
1500 | stats->rx_fifo_errors += ring->rx_fifo_errors; | |
3bb502f8 IS |
1501 | } |
1502 | } | |
e6ad7673 IS |
1503 | } |
1504 | ||
1505 | static int xgene_enet_set_mac_address(struct net_device *ndev, void *addr) | |
1506 | { | |
1507 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
1508 | int ret; | |
1509 | ||
1510 | ret = eth_mac_addr(ndev, addr); | |
1511 | if (ret) | |
1512 | return ret; | |
d0eb7458 | 1513 | pdata->mac_ops->set_mac_addr(pdata); |
e6ad7673 IS |
1514 | |
1515 | return ret; | |
1516 | } | |
1517 | ||
350b4e33 IS |
1518 | static int xgene_change_mtu(struct net_device *ndev, int new_mtu) |
1519 | { | |
1520 | struct xgene_enet_pdata *pdata = netdev_priv(ndev); | |
1521 | int frame_size; | |
1522 | ||
1523 | if (!netif_running(ndev)) | |
1524 | return 0; | |
1525 | ||
1526 | frame_size = (new_mtu > ETH_DATA_LEN) ? (new_mtu + 18) : 0x600; | |
1527 | ||
1528 | xgene_enet_close(ndev); | |
1529 | ndev->mtu = new_mtu; | |
1530 | pdata->mac_ops->set_framesize(pdata, frame_size); | |
1531 | xgene_enet_open(ndev); | |
1532 | ||
1533 | return 0; | |
1534 | } | |
1535 | ||
e6ad7673 IS |
1536 | static const struct net_device_ops xgene_ndev_ops = { |
1537 | .ndo_open = xgene_enet_open, | |
1538 | .ndo_stop = xgene_enet_close, | |
1539 | .ndo_start_xmit = xgene_enet_start_xmit, | |
1540 | .ndo_tx_timeout = xgene_enet_timeout, | |
1541 | .ndo_get_stats64 = xgene_enet_get_stats64, | |
350b4e33 | 1542 | .ndo_change_mtu = xgene_change_mtu, |
e6ad7673 IS |
1543 | .ndo_set_mac_address = xgene_enet_set_mac_address, |
1544 | }; | |
1545 | ||
8beeef8d | 1546 | #ifdef CONFIG_ACPI |
724fe695 | 1547 | static void xgene_get_port_id_acpi(struct device *dev, |
0738c54d ST |
1548 | struct xgene_enet_pdata *pdata) |
1549 | { | |
1550 | acpi_status status; | |
1551 | u64 temp; | |
1552 | ||
1553 | status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_SUN", NULL, &temp); | |
1554 | if (ACPI_FAILURE(status)) { | |
1555 | pdata->port_id = 0; | |
1556 | } else { | |
1557 | pdata->port_id = temp; | |
1558 | } | |
1559 | ||
724fe695 | 1560 | return; |
0738c54d | 1561 | } |
8beeef8d | 1562 | #endif |
0738c54d | 1563 | |
724fe695 | 1564 | static void xgene_get_port_id_dt(struct device *dev, struct xgene_enet_pdata *pdata) |
ca626454 KC |
1565 | { |
1566 | u32 id = 0; | |
ca626454 | 1567 | |
724fe695 | 1568 | of_property_read_u32(dev->of_node, "port-id", &id); |
ca626454 | 1569 | |
724fe695 SS |
1570 | pdata->port_id = id & BIT(0); |
1571 | ||
1572 | return; | |
ca626454 KC |
1573 | } |
1574 | ||
16615a4c IS |
1575 | static int xgene_get_tx_delay(struct xgene_enet_pdata *pdata) |
1576 | { | |
1577 | struct device *dev = &pdata->pdev->dev; | |
1578 | int delay, ret; | |
1579 | ||
1580 | ret = of_property_read_u32(dev->of_node, "tx-delay", &delay); | |
1581 | if (ret) { | |
1582 | pdata->tx_delay = 4; | |
1583 | return 0; | |
1584 | } | |
1585 | ||
1586 | if (delay < 0 || delay > 7) { | |
1587 | dev_err(dev, "Invalid tx-delay specified\n"); | |
1588 | return -EINVAL; | |
1589 | } | |
1590 | ||
1591 | pdata->tx_delay = delay; | |
1592 | ||
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | static int xgene_get_rx_delay(struct xgene_enet_pdata *pdata) | |
1597 | { | |
1598 | struct device *dev = &pdata->pdev->dev; | |
1599 | int delay, ret; | |
1600 | ||
1601 | ret = of_property_read_u32(dev->of_node, "rx-delay", &delay); | |
1602 | if (ret) { | |
1603 | pdata->rx_delay = 2; | |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | if (delay < 0 || delay > 7) { | |
1608 | dev_err(dev, "Invalid rx-delay specified\n"); | |
1609 | return -EINVAL; | |
1610 | } | |
1611 | ||
1612 | pdata->rx_delay = delay; | |
1613 | ||
1614 | return 0; | |
1615 | } | |
de7b5b3d | 1616 | |
107dec27 IS |
1617 | static int xgene_enet_get_irqs(struct xgene_enet_pdata *pdata) |
1618 | { | |
1619 | struct platform_device *pdev = pdata->pdev; | |
1620 | struct device *dev = &pdev->dev; | |
1621 | int i, ret, max_irqs; | |
1622 | ||
1623 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) | |
1624 | max_irqs = 1; | |
1625 | else if (pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) | |
1626 | max_irqs = 2; | |
1627 | else | |
1628 | max_irqs = XGENE_MAX_ENET_IRQ; | |
1629 | ||
1630 | for (i = 0; i < max_irqs; i++) { | |
1631 | ret = platform_get_irq(pdev, i); | |
1632 | if (ret <= 0) { | |
1b090a48 IS |
1633 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
1634 | max_irqs = i; | |
1635 | pdata->rxq_cnt = max_irqs / 2; | |
1636 | pdata->txq_cnt = max_irqs / 2; | |
1637 | pdata->cq_cnt = max_irqs / 2; | |
1638 | break; | |
1639 | } | |
107dec27 IS |
1640 | dev_err(dev, "Unable to get ENET IRQ\n"); |
1641 | ret = ret ? : -ENXIO; | |
1642 | return ret; | |
1643 | } | |
1644 | pdata->irqs[i] = ret; | |
1645 | } | |
1646 | ||
1647 | return 0; | |
1648 | } | |
1649 | ||
8089a96f IS |
1650 | static int xgene_enet_check_phy_handle(struct xgene_enet_pdata *pdata) |
1651 | { | |
1652 | int ret; | |
1653 | ||
1654 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) | |
1655 | return 0; | |
1656 | ||
1657 | if (!IS_ENABLED(CONFIG_MDIO_XGENE)) | |
1658 | return 0; | |
1659 | ||
1660 | ret = xgene_enet_phy_connect(pdata->ndev); | |
1661 | if (!ret) | |
1662 | pdata->mdio_driver = true; | |
1663 | ||
1664 | return 0; | |
1665 | } | |
1666 | ||
27ecf87c IS |
1667 | static void xgene_enet_gpiod_get(struct xgene_enet_pdata *pdata) |
1668 | { | |
1669 | struct device *dev = &pdata->pdev->dev; | |
1670 | ||
751d6fd1 IS |
1671 | pdata->sfp_gpio_en = false; |
1672 | if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII || | |
1673 | (!device_property_present(dev, "sfp-gpios") && | |
1674 | !device_property_present(dev, "rxlos-gpios"))) | |
27ecf87c IS |
1675 | return; |
1676 | ||
751d6fd1 | 1677 | pdata->sfp_gpio_en = true; |
27ecf87c IS |
1678 | pdata->sfp_rdy = gpiod_get(dev, "rxlos", GPIOD_IN); |
1679 | if (IS_ERR(pdata->sfp_rdy)) | |
1680 | pdata->sfp_rdy = gpiod_get(dev, "sfp", GPIOD_IN); | |
1681 | } | |
1682 | ||
e6ad7673 IS |
1683 | static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) |
1684 | { | |
1685 | struct platform_device *pdev; | |
1686 | struct net_device *ndev; | |
1687 | struct device *dev; | |
1688 | struct resource *res; | |
1689 | void __iomem *base_addr; | |
561fea6d | 1690 | u32 offset; |
2e598712 | 1691 | int ret = 0; |
e6ad7673 IS |
1692 | |
1693 | pdev = pdata->pdev; | |
1694 | dev = &pdev->dev; | |
1695 | ndev = pdata->ndev; | |
1696 | ||
de7b5b3d FK |
1697 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_ENET_CSR); |
1698 | if (!res) { | |
1699 | dev_err(dev, "Resource enet_csr not defined\n"); | |
1700 | return -ENODEV; | |
1701 | } | |
1702 | pdata->base_addr = devm_ioremap(dev, res->start, resource_size(res)); | |
3ec7a176 | 1703 | if (!pdata->base_addr) { |
e6ad7673 | 1704 | dev_err(dev, "Unable to retrieve ENET Port CSR region\n"); |
3ec7a176 | 1705 | return -ENOMEM; |
e6ad7673 IS |
1706 | } |
1707 | ||
de7b5b3d FK |
1708 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CSR); |
1709 | if (!res) { | |
1710 | dev_err(dev, "Resource ring_csr not defined\n"); | |
1711 | return -ENODEV; | |
1712 | } | |
1713 | pdata->ring_csr_addr = devm_ioremap(dev, res->start, | |
1714 | resource_size(res)); | |
3ec7a176 | 1715 | if (!pdata->ring_csr_addr) { |
e6ad7673 | 1716 | dev_err(dev, "Unable to retrieve ENET Ring CSR region\n"); |
3ec7a176 | 1717 | return -ENOMEM; |
e6ad7673 IS |
1718 | } |
1719 | ||
de7b5b3d FK |
1720 | res = platform_get_resource(pdev, IORESOURCE_MEM, RES_RING_CMD); |
1721 | if (!res) { | |
1722 | dev_err(dev, "Resource ring_cmd not defined\n"); | |
1723 | return -ENODEV; | |
1724 | } | |
1725 | pdata->ring_cmd_addr = devm_ioremap(dev, res->start, | |
1726 | resource_size(res)); | |
3ec7a176 | 1727 | if (!pdata->ring_cmd_addr) { |
e6ad7673 | 1728 | dev_err(dev, "Unable to retrieve ENET Ring command region\n"); |
3ec7a176 | 1729 | return -ENOMEM; |
e6ad7673 IS |
1730 | } |
1731 | ||
0738c54d | 1732 | if (dev->of_node) |
724fe695 | 1733 | xgene_get_port_id_dt(dev, pdata); |
0738c54d ST |
1734 | #ifdef CONFIG_ACPI |
1735 | else | |
724fe695 | 1736 | xgene_get_port_id_acpi(dev, pdata); |
0738c54d | 1737 | #endif |
ca626454 | 1738 | |
938049e1 | 1739 | if (!device_get_mac_address(dev, ndev->dev_addr, ETH_ALEN)) |
e6ad7673 | 1740 | eth_hw_addr_random(ndev); |
de7b5b3d | 1741 | |
e6ad7673 IS |
1742 | memcpy(ndev->perm_addr, ndev->dev_addr, ndev->addr_len); |
1743 | ||
938049e1 | 1744 | pdata->phy_mode = device_get_phy_mode(dev); |
e6ad7673 | 1745 | if (pdata->phy_mode < 0) { |
0148d38d IS |
1746 | dev_err(dev, "Unable to get phy-connection-type\n"); |
1747 | return pdata->phy_mode; | |
1748 | } | |
1749 | if (pdata->phy_mode != PHY_INTERFACE_MODE_RGMII && | |
32f784b5 | 1750 | pdata->phy_mode != PHY_INTERFACE_MODE_SGMII && |
0148d38d IS |
1751 | pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) { |
1752 | dev_err(dev, "Incorrect phy-connection-type specified\n"); | |
1753 | return -ENODEV; | |
e6ad7673 IS |
1754 | } |
1755 | ||
16615a4c IS |
1756 | ret = xgene_get_tx_delay(pdata); |
1757 | if (ret) | |
1758 | return ret; | |
1759 | ||
1760 | ret = xgene_get_rx_delay(pdata); | |
1761 | if (ret) | |
1762 | return ret; | |
1763 | ||
107dec27 IS |
1764 | ret = xgene_enet_get_irqs(pdata); |
1765 | if (ret) | |
6772b653 | 1766 | return ret; |
6772b653 | 1767 | |
8089a96f IS |
1768 | ret = xgene_enet_check_phy_handle(pdata); |
1769 | if (ret) | |
1770 | return ret; | |
1771 | ||
27ecf87c IS |
1772 | xgene_enet_gpiod_get(pdata); |
1773 | ||
e6ad7673 | 1774 | pdata->clk = devm_clk_get(&pdev->dev, NULL); |
e6ad7673 | 1775 | if (IS_ERR(pdata->clk)) { |
9aea7779 AB |
1776 | /* Abort if the clock is defined but couldn't be retrived. |
1777 | * Always abort if the clock is missing on DT system as | |
1778 | * the driver can't cope with this case. | |
1779 | */ | |
1780 | if (PTR_ERR(pdata->clk) != -ENOENT || dev->of_node) | |
1781 | return PTR_ERR(pdata->clk); | |
de7b5b3d | 1782 | /* Firmware may have set up the clock already. */ |
c2d33bdc | 1783 | dev_info(dev, "clocks have been setup already\n"); |
e6ad7673 IS |
1784 | } |
1785 | ||
bc1b7c13 IS |
1786 | if (pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) |
1787 | base_addr = pdata->base_addr - (pdata->port_id * MAC_OFFSET); | |
1788 | else | |
1789 | base_addr = pdata->base_addr; | |
e6ad7673 | 1790 | pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET; |
76f94a9c | 1791 | pdata->cle.base = base_addr + BLOCK_ETH_CLE_CSR_OFFSET; |
e6ad7673 IS |
1792 | pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET; |
1793 | pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET; | |
32f784b5 IS |
1794 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII || |
1795 | pdata->phy_mode == PHY_INTERFACE_MODE_SGMII) { | |
ca626454 | 1796 | pdata->mcx_mac_addr = pdata->base_addr + BLOCK_ETH_MAC_OFFSET; |
2d07d8e4 QN |
1797 | pdata->mcx_stats_addr = |
1798 | pdata->base_addr + BLOCK_ETH_STATS_OFFSET; | |
561fea6d IS |
1799 | offset = (pdata->enet_id == XGENE_ENET1) ? |
1800 | BLOCK_ETH_MAC_CSR_OFFSET : | |
1801 | X2_BLOCK_ETH_MAC_CSR_OFFSET; | |
1802 | pdata->mcx_mac_csr_addr = base_addr + offset; | |
0148d38d IS |
1803 | } else { |
1804 | pdata->mcx_mac_addr = base_addr + BLOCK_AXG_MAC_OFFSET; | |
2d07d8e4 | 1805 | pdata->mcx_stats_addr = base_addr + BLOCK_AXG_STATS_OFFSET; |
0148d38d | 1806 | pdata->mcx_mac_csr_addr = base_addr + BLOCK_AXG_MAC_CSR_OFFSET; |
3eb7cb9d | 1807 | pdata->pcs_addr = base_addr + BLOCK_PCS_OFFSET; |
0148d38d | 1808 | } |
e6ad7673 IS |
1809 | pdata->rx_buff_cnt = NUM_PKT_BUF; |
1810 | ||
0148d38d | 1811 | return 0; |
e6ad7673 IS |
1812 | } |
1813 | ||
1814 | static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata) | |
1815 | { | |
76f94a9c | 1816 | struct xgene_enet_cle *enet_cle = &pdata->cle; |
d6d48969 | 1817 | struct xgene_enet_desc_ring *page_pool; |
e6ad7673 IS |
1818 | struct net_device *ndev = pdata->ndev; |
1819 | struct xgene_enet_desc_ring *buf_pool; | |
d6d48969 | 1820 | u16 dst_ring_num, ring_id; |
107dec27 | 1821 | int i, ret; |
a9380b0f | 1822 | u32 count; |
e6ad7673 | 1823 | |
c3f4465d IS |
1824 | ret = pdata->port_ops->reset(pdata); |
1825 | if (ret) | |
1826 | return ret; | |
e6ad7673 IS |
1827 | |
1828 | ret = xgene_enet_create_desc_rings(ndev); | |
1829 | if (ret) { | |
1830 | netdev_err(ndev, "Error in ring configuration\n"); | |
1831 | return ret; | |
1832 | } | |
1833 | ||
1834 | /* setup buffer pool */ | |
107dec27 IS |
1835 | for (i = 0; i < pdata->rxq_cnt; i++) { |
1836 | buf_pool = pdata->rx_ring[i]->buf_pool; | |
1837 | xgene_enet_init_bufpool(buf_pool); | |
a9380b0f IS |
1838 | page_pool = pdata->rx_ring[i]->page_pool; |
1839 | xgene_enet_init_bufpool(page_pool); | |
1840 | ||
1841 | count = pdata->rx_buff_cnt; | |
1842 | ret = xgene_enet_refill_bufpool(buf_pool, count); | |
15e32296 IS |
1843 | if (ret) |
1844 | goto err; | |
a9380b0f IS |
1845 | |
1846 | ret = xgene_enet_refill_pagepool(page_pool, count); | |
1847 | if (ret) | |
1848 | goto err; | |
1849 | ||
e6ad7673 IS |
1850 | } |
1851 | ||
107dec27 IS |
1852 | dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring[0]); |
1853 | buf_pool = pdata->rx_ring[0]->buf_pool; | |
76f94a9c IS |
1854 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
1855 | /* Initialize and Enable PreClassifier Tree */ | |
1856 | enet_cle->max_nodes = 512; | |
1857 | enet_cle->max_dbptrs = 1024; | |
1858 | enet_cle->parsers = 3; | |
1859 | enet_cle->active_parser = PARSER_ALL; | |
1860 | enet_cle->ptree.start_node = 0; | |
1861 | enet_cle->ptree.start_dbptr = 0; | |
1862 | enet_cle->jump_bytes = 8; | |
1863 | ret = pdata->cle_ops->cle_init(pdata); | |
1864 | if (ret) { | |
1865 | netdev_err(ndev, "Preclass Tree init error\n"); | |
15e32296 | 1866 | goto err; |
76f94a9c | 1867 | } |
d6d48969 | 1868 | |
76f94a9c | 1869 | } else { |
d6d48969 IS |
1870 | dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring[0]); |
1871 | buf_pool = pdata->rx_ring[0]->buf_pool; | |
1872 | page_pool = pdata->rx_ring[0]->page_pool; | |
1873 | ring_id = (page_pool) ? page_pool->id : 0; | |
1874 | pdata->port_ops->cle_bypass(pdata, dst_ring_num, | |
1875 | buf_pool->id, ring_id); | |
76f94a9c IS |
1876 | } |
1877 | ||
350b4e33 | 1878 | ndev->max_mtu = XGENE_ENET_MAX_MTU; |
9a8c5dde | 1879 | pdata->phy_speed = SPEED_UNKNOWN; |
0148d38d | 1880 | pdata->mac_ops->init(pdata); |
e6ad7673 IS |
1881 | |
1882 | return ret; | |
15e32296 IS |
1883 | |
1884 | err: | |
1885 | xgene_enet_delete_desc_rings(pdata); | |
1886 | return ret; | |
e6ad7673 IS |
1887 | } |
1888 | ||
d0eb7458 IS |
1889 | static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata) |
1890 | { | |
0148d38d IS |
1891 | switch (pdata->phy_mode) { |
1892 | case PHY_INTERFACE_MODE_RGMII: | |
1893 | pdata->mac_ops = &xgene_gmac_ops; | |
1894 | pdata->port_ops = &xgene_gport_ops; | |
dc8385f0 | 1895 | pdata->rm = RM3; |
107dec27 IS |
1896 | pdata->rxq_cnt = 1; |
1897 | pdata->txq_cnt = 1; | |
1898 | pdata->cq_cnt = 0; | |
0148d38d | 1899 | break; |
32f784b5 IS |
1900 | case PHY_INTERFACE_MODE_SGMII: |
1901 | pdata->mac_ops = &xgene_sgmac_ops; | |
1902 | pdata->port_ops = &xgene_sgport_ops; | |
1903 | pdata->rm = RM1; | |
107dec27 IS |
1904 | pdata->rxq_cnt = 1; |
1905 | pdata->txq_cnt = 1; | |
1906 | pdata->cq_cnt = 1; | |
32f784b5 | 1907 | break; |
0148d38d IS |
1908 | default: |
1909 | pdata->mac_ops = &xgene_xgmac_ops; | |
1910 | pdata->port_ops = &xgene_xgport_ops; | |
76f94a9c | 1911 | pdata->cle_ops = &xgene_cle3in_ops; |
dc8385f0 | 1912 | pdata->rm = RM0; |
1b090a48 IS |
1913 | if (!pdata->rxq_cnt) { |
1914 | pdata->rxq_cnt = XGENE_NUM_RX_RING; | |
1915 | pdata->txq_cnt = XGENE_NUM_TX_RING; | |
1916 | pdata->cq_cnt = XGENE_NUM_TXC_RING; | |
1917 | } | |
0148d38d IS |
1918 | break; |
1919 | } | |
ca626454 | 1920 | |
bc1b7c13 IS |
1921 | if (pdata->enet_id == XGENE_ENET1) { |
1922 | switch (pdata->port_id) { | |
1923 | case 0: | |
1b090a48 IS |
1924 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
1925 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; | |
1926 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; | |
1927 | pdata->bp_bufnum = X2_START_BP_BUFNUM_0; | |
1928 | pdata->ring_num = START_RING_NUM_0; | |
1929 | } else { | |
1930 | pdata->cpu_bufnum = START_CPU_BUFNUM_0; | |
1931 | pdata->eth_bufnum = START_ETH_BUFNUM_0; | |
1932 | pdata->bp_bufnum = START_BP_BUFNUM_0; | |
1933 | pdata->ring_num = START_RING_NUM_0; | |
1934 | } | |
bc1b7c13 IS |
1935 | break; |
1936 | case 1: | |
149e9ab4 IS |
1937 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
1938 | pdata->cpu_bufnum = XG_START_CPU_BUFNUM_1; | |
1939 | pdata->eth_bufnum = XG_START_ETH_BUFNUM_1; | |
1940 | pdata->bp_bufnum = XG_START_BP_BUFNUM_1; | |
1941 | pdata->ring_num = XG_START_RING_NUM_1; | |
1942 | } else { | |
1943 | pdata->cpu_bufnum = START_CPU_BUFNUM_1; | |
1944 | pdata->eth_bufnum = START_ETH_BUFNUM_1; | |
1945 | pdata->bp_bufnum = START_BP_BUFNUM_1; | |
1946 | pdata->ring_num = START_RING_NUM_1; | |
1947 | } | |
bc1b7c13 IS |
1948 | break; |
1949 | default: | |
1950 | break; | |
1951 | } | |
1952 | pdata->ring_ops = &xgene_ring1_ops; | |
1953 | } else { | |
1954 | switch (pdata->port_id) { | |
1955 | case 0: | |
1956 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_0; | |
1957 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_0; | |
1958 | pdata->bp_bufnum = X2_START_BP_BUFNUM_0; | |
1959 | pdata->ring_num = X2_START_RING_NUM_0; | |
1960 | break; | |
1961 | case 1: | |
1962 | pdata->cpu_bufnum = X2_START_CPU_BUFNUM_1; | |
1963 | pdata->eth_bufnum = X2_START_ETH_BUFNUM_1; | |
1964 | pdata->bp_bufnum = X2_START_BP_BUFNUM_1; | |
1965 | pdata->ring_num = X2_START_RING_NUM_1; | |
1966 | break; | |
1967 | default: | |
1968 | break; | |
1969 | } | |
1970 | pdata->rm = RM0; | |
1971 | pdata->ring_ops = &xgene_ring2_ops; | |
ca626454 | 1972 | } |
d0eb7458 IS |
1973 | } |
1974 | ||
6772b653 IS |
1975 | static void xgene_enet_napi_add(struct xgene_enet_pdata *pdata) |
1976 | { | |
1977 | struct napi_struct *napi; | |
107dec27 | 1978 | int i; |
6772b653 | 1979 | |
107dec27 IS |
1980 | for (i = 0; i < pdata->rxq_cnt; i++) { |
1981 | napi = &pdata->rx_ring[i]->napi; | |
1982 | netif_napi_add(pdata->ndev, napi, xgene_enet_napi, | |
1983 | NAPI_POLL_WEIGHT); | |
1984 | } | |
6772b653 | 1985 | |
107dec27 IS |
1986 | for (i = 0; i < pdata->cq_cnt; i++) { |
1987 | napi = &pdata->tx_ring[i]->cp_ring->napi; | |
6772b653 IS |
1988 | netif_napi_add(pdata->ndev, napi, xgene_enet_napi, |
1989 | NAPI_POLL_WEIGHT); | |
1990 | } | |
1991 | } | |
1992 | ||
1f3d6209 AB |
1993 | #ifdef CONFIG_ACPI |
1994 | static const struct acpi_device_id xgene_enet_acpi_match[] = { | |
1995 | { "APMC0D05", XGENE_ENET1}, | |
1996 | { "APMC0D30", XGENE_ENET1}, | |
1997 | { "APMC0D31", XGENE_ENET1}, | |
1998 | { "APMC0D3F", XGENE_ENET1}, | |
1999 | { "APMC0D26", XGENE_ENET2}, | |
2000 | { "APMC0D25", XGENE_ENET2}, | |
2001 | { } | |
2002 | }; | |
2003 | MODULE_DEVICE_TABLE(acpi, xgene_enet_acpi_match); | |
2004 | #endif | |
2005 | ||
2006 | static const struct of_device_id xgene_enet_of_match[] = { | |
2007 | {.compatible = "apm,xgene-enet", .data = (void *)XGENE_ENET1}, | |
2008 | {.compatible = "apm,xgene1-sgenet", .data = (void *)XGENE_ENET1}, | |
2009 | {.compatible = "apm,xgene1-xgenet", .data = (void *)XGENE_ENET1}, | |
2010 | {.compatible = "apm,xgene2-sgenet", .data = (void *)XGENE_ENET2}, | |
2011 | {.compatible = "apm,xgene2-xgenet", .data = (void *)XGENE_ENET2}, | |
2012 | {}, | |
2013 | }; | |
2014 | ||
2015 | MODULE_DEVICE_TABLE(of, xgene_enet_of_match); | |
2016 | ||
e6ad7673 IS |
2017 | static int xgene_enet_probe(struct platform_device *pdev) |
2018 | { | |
2019 | struct net_device *ndev; | |
2020 | struct xgene_enet_pdata *pdata; | |
2021 | struct device *dev = &pdev->dev; | |
8089a96f | 2022 | void (*link_state)(struct work_struct *); |
bc1b7c13 | 2023 | const struct of_device_id *of_id; |
e6ad7673 IS |
2024 | int ret; |
2025 | ||
107dec27 IS |
2026 | ndev = alloc_etherdev_mqs(sizeof(struct xgene_enet_pdata), |
2027 | XGENE_NUM_RX_RING, XGENE_NUM_TX_RING); | |
e6ad7673 IS |
2028 | if (!ndev) |
2029 | return -ENOMEM; | |
2030 | ||
2031 | pdata = netdev_priv(ndev); | |
2032 | ||
2033 | pdata->pdev = pdev; | |
2034 | pdata->ndev = ndev; | |
2035 | SET_NETDEV_DEV(ndev, dev); | |
2036 | platform_set_drvdata(pdev, pdata); | |
2037 | ndev->netdev_ops = &xgene_ndev_ops; | |
2038 | xgene_enet_set_ethtool_ops(ndev); | |
2039 | ndev->features |= NETIF_F_IP_CSUM | | |
2040 | NETIF_F_GSO | | |
9b00eb49 IS |
2041 | NETIF_F_GRO | |
2042 | NETIF_F_SG; | |
e6ad7673 | 2043 | |
bc1b7c13 IS |
2044 | of_id = of_match_device(xgene_enet_of_match, &pdev->dev); |
2045 | if (of_id) { | |
2046 | pdata->enet_id = (enum xgene_enet_id)of_id->data; | |
0738c54d ST |
2047 | } |
2048 | #ifdef CONFIG_ACPI | |
2049 | else { | |
2050 | const struct acpi_device_id *acpi_id; | |
2051 | ||
2052 | acpi_id = acpi_match_device(xgene_enet_acpi_match, &pdev->dev); | |
2053 | if (acpi_id) | |
2054 | pdata->enet_id = (enum xgene_enet_id) acpi_id->driver_data; | |
bc1b7c13 IS |
2055 | } |
2056 | #endif | |
0738c54d | 2057 | if (!pdata->enet_id) { |
cecd6e51 IS |
2058 | ret = -ENODEV; |
2059 | goto err; | |
0738c54d | 2060 | } |
bc1b7c13 | 2061 | |
e6ad7673 IS |
2062 | ret = xgene_enet_get_resources(pdata); |
2063 | if (ret) | |
2064 | goto err; | |
2065 | ||
d0eb7458 | 2066 | xgene_enet_setup_ops(pdata); |
ae1aed95 | 2067 | spin_lock_init(&pdata->mac_lock); |
e6ad7673 | 2068 | |
9b00eb49 | 2069 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { |
0a0400c3 | 2070 | ndev->features |= NETIF_F_TSO | NETIF_F_RXCSUM; |
e3978673 | 2071 | spin_lock_init(&pdata->mss_lock); |
9b00eb49 IS |
2072 | } |
2073 | ndev->hw_features = ndev->features; | |
2074 | ||
aeb20b6b | 2075 | ret = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64)); |
e6ad7673 | 2076 | if (ret) { |
aeb20b6b | 2077 | netdev_err(ndev, "No usable DMA configuration\n"); |
e6ad7673 IS |
2078 | goto err; |
2079 | } | |
2080 | ||
e6ad7673 IS |
2081 | ret = xgene_enet_init_hw(pdata); |
2082 | if (ret) | |
cecd6e51 | 2083 | goto err; |
e6ad7673 | 2084 | |
8089a96f IS |
2085 | link_state = pdata->mac_ops->link_state; |
2086 | if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { | |
2087 | INIT_DELAYED_WORK(&pdata->link_work, link_state); | |
2088 | } else if (!pdata->mdio_driver) { | |
2089 | if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) | |
2090 | ret = xgene_enet_mdio_config(pdata); | |
2091 | else | |
2092 | INIT_DELAYED_WORK(&pdata->link_work, link_state); | |
cecd6e51 IS |
2093 | |
2094 | if (ret) | |
2095 | goto err1; | |
aeb20b6b | 2096 | } |
e6ad7673 | 2097 | |
2d07d8e4 QN |
2098 | spin_lock_init(&pdata->stats_lock); |
2099 | ret = xgene_extd_stats_init(pdata); | |
2100 | if (ret) | |
2101 | goto err2; | |
2102 | ||
aeb20b6b | 2103 | xgene_enet_napi_add(pdata); |
cb0366b7 IS |
2104 | ret = register_netdev(ndev); |
2105 | if (ret) { | |
2106 | netdev_err(ndev, "Failed to register netdev\n"); | |
cecd6e51 | 2107 | goto err2; |
cb0366b7 IS |
2108 | } |
2109 | ||
aeb20b6b | 2110 | return 0; |
cb0366b7 | 2111 | |
cecd6e51 IS |
2112 | err2: |
2113 | /* | |
2114 | * If necessary, free_netdev() will call netif_napi_del() and undo | |
2115 | * the effects of xgene_enet_napi_add()'s calls to netif_napi_add(). | |
2116 | */ | |
2117 | ||
2118 | if (pdata->mdio_driver) | |
2119 | xgene_enet_phy_disconnect(pdata); | |
2120 | else if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) | |
2121 | xgene_enet_mdio_remove(pdata); | |
2122 | err1: | |
2123 | xgene_enet_delete_desc_rings(pdata); | |
20decb7e | 2124 | err: |
e6ad7673 IS |
2125 | free_netdev(ndev); |
2126 | return ret; | |
2127 | } | |
2128 | ||
2129 | static int xgene_enet_remove(struct platform_device *pdev) | |
2130 | { | |
2131 | struct xgene_enet_pdata *pdata; | |
2132 | struct net_device *ndev; | |
2133 | ||
2134 | pdata = platform_get_drvdata(pdev); | |
2135 | ndev = pdata->ndev; | |
2136 | ||
cb0366b7 IS |
2137 | rtnl_lock(); |
2138 | if (netif_running(ndev)) | |
2139 | dev_close(ndev); | |
2140 | rtnl_unlock(); | |
2141 | ||
8089a96f IS |
2142 | if (pdata->mdio_driver) |
2143 | xgene_enet_phy_disconnect(pdata); | |
2144 | else if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) | |
ccc02ddb | 2145 | xgene_enet_mdio_remove(pdata); |
8089a96f | 2146 | |
e6ad7673 | 2147 | unregister_netdev(ndev); |
d0eb7458 | 2148 | pdata->port_ops->shutdown(pdata); |
cb11c062 | 2149 | xgene_enet_delete_desc_rings(pdata); |
e6ad7673 IS |
2150 | free_netdev(ndev); |
2151 | ||
2152 | return 0; | |
2153 | } | |
2154 | ||
cb0366b7 IS |
2155 | static void xgene_enet_shutdown(struct platform_device *pdev) |
2156 | { | |
2157 | struct xgene_enet_pdata *pdata; | |
2158 | ||
2159 | pdata = platform_get_drvdata(pdev); | |
2160 | if (!pdata) | |
2161 | return; | |
2162 | ||
2163 | if (!pdata->ndev) | |
2164 | return; | |
2165 | ||
2166 | xgene_enet_remove(pdev); | |
2167 | } | |
2168 | ||
e6ad7673 IS |
2169 | static struct platform_driver xgene_enet_driver = { |
2170 | .driver = { | |
2171 | .name = "xgene-enet", | |
de7b5b3d FK |
2172 | .of_match_table = of_match_ptr(xgene_enet_of_match), |
2173 | .acpi_match_table = ACPI_PTR(xgene_enet_acpi_match), | |
e6ad7673 IS |
2174 | }, |
2175 | .probe = xgene_enet_probe, | |
2176 | .remove = xgene_enet_remove, | |
cb0366b7 | 2177 | .shutdown = xgene_enet_shutdown, |
e6ad7673 IS |
2178 | }; |
2179 | ||
2180 | module_platform_driver(xgene_enet_driver); | |
2181 | ||
2182 | MODULE_DESCRIPTION("APM X-Gene SoC Ethernet driver"); | |
2183 | MODULE_VERSION(XGENE_DRV_VERSION); | |
d0eb7458 | 2184 | MODULE_AUTHOR("Iyappan Subramanian <isubramanian@apm.com>"); |
e6ad7673 IS |
2185 | MODULE_AUTHOR("Keyur Chudgar <kchudgar@apm.com>"); |
2186 | MODULE_LICENSE("GPL"); |