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2be7d22f | 1 | /* |
02525a79 | 2 | * Copyright (c) 2012-2014 Qualcomm Atheros, Inc. |
2be7d22f VK |
3 | * |
4 | * Permission to use, copy, modify, and/or distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
2be7d22f | 17 | #include <linux/etherdevice.h> |
2be7d22f VK |
18 | #include <net/ieee80211_radiotap.h> |
19 | #include <linux/if_arp.h> | |
20 | #include <linux/moduleparam.h> | |
504937d4 KE |
21 | #include <linux/ip.h> |
22 | #include <linux/ipv6.h> | |
23 | #include <net/ipv6.h> | |
0786dc4e | 24 | #include <linux/prefetch.h> |
2be7d22f VK |
25 | |
26 | #include "wil6210.h" | |
27 | #include "wmi.h" | |
28 | #include "txrx.h" | |
98658095 | 29 | #include "trace.h" |
2be7d22f VK |
30 | |
31 | static bool rtap_include_phy_info; | |
32 | module_param(rtap_include_phy_info, bool, S_IRUGO); | |
33 | MODULE_PARM_DESC(rtap_include_phy_info, | |
34 | " Include PHY info in the radiotap header, default - no"); | |
35 | ||
36 | static inline int wil_vring_is_empty(struct vring *vring) | |
37 | { | |
38 | return vring->swhead == vring->swtail; | |
39 | } | |
40 | ||
41 | static inline u32 wil_vring_next_tail(struct vring *vring) | |
42 | { | |
43 | return (vring->swtail + 1) % vring->size; | |
44 | } | |
45 | ||
46 | static inline void wil_vring_advance_head(struct vring *vring, int n) | |
47 | { | |
48 | vring->swhead = (vring->swhead + n) % vring->size; | |
49 | } | |
50 | ||
51 | static inline int wil_vring_is_full(struct vring *vring) | |
52 | { | |
53 | return wil_vring_next_tail(vring) == vring->swhead; | |
54 | } | |
8fe59627 | 55 | |
2be7d22f VK |
56 | /* |
57 | * Available space in Tx Vring | |
58 | */ | |
59 | static inline int wil_vring_avail_tx(struct vring *vring) | |
60 | { | |
61 | u32 swhead = vring->swhead; | |
62 | u32 swtail = vring->swtail; | |
63 | int used = (vring->size + swhead - swtail) % vring->size; | |
64 | ||
65 | return vring->size - used - 1; | |
66 | } | |
67 | ||
5bb6423e VK |
68 | /** |
69 | * wil_vring_wmark_low - low watermark for available descriptor space | |
70 | */ | |
71 | static inline int wil_vring_wmark_low(struct vring *vring) | |
72 | { | |
73 | return vring->size/8; | |
74 | } | |
75 | ||
76 | /** | |
77 | * wil_vring_wmark_high - high watermark for available descriptor space | |
78 | */ | |
79 | static inline int wil_vring_wmark_high(struct vring *vring) | |
80 | { | |
81 | return vring->size/4; | |
82 | } | |
83 | ||
2be7d22f VK |
84 | static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) |
85 | { | |
86 | struct device *dev = wil_to_dev(wil); | |
87 | size_t sz = vring->size * sizeof(vring->va[0]); | |
88 | uint i; | |
89 | ||
9cf10d62 VK |
90 | wil_dbg_misc(wil, "%s()\n", __func__); |
91 | ||
2be7d22f VK |
92 | BUILD_BUG_ON(sizeof(vring->va[0]) != 32); |
93 | ||
94 | vring->swhead = 0; | |
95 | vring->swtail = 0; | |
f88f113a | 96 | vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); |
2be7d22f | 97 | if (!vring->ctx) { |
2be7d22f VK |
98 | vring->va = NULL; |
99 | return -ENOMEM; | |
100 | } | |
101 | /* | |
102 | * vring->va should be aligned on its size rounded up to power of 2 | |
103 | * This is granted by the dma_alloc_coherent | |
104 | */ | |
105 | vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); | |
106 | if (!vring->va) { | |
2be7d22f VK |
107 | kfree(vring->ctx); |
108 | vring->ctx = NULL; | |
109 | return -ENOMEM; | |
110 | } | |
111 | /* initially, all descriptors are SW owned | |
112 | * For Tx and Rx, ownership bit is at the same location, thus | |
113 | * we can use any | |
114 | */ | |
115 | for (i = 0; i < vring->size; i++) { | |
8fe59627 VK |
116 | volatile struct vring_tx_desc *_d = &vring->va[i].tx; |
117 | ||
68ada71e | 118 | _d->dma.status = TX_DMA_STATUS_DU; |
2be7d22f VK |
119 | } |
120 | ||
39c52ee8 VK |
121 | wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, |
122 | vring->va, &vring->pa, vring->ctx); | |
2be7d22f VK |
123 | |
124 | return 0; | |
125 | } | |
126 | ||
2232abd5 VK |
127 | static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, |
128 | struct wil_ctx *ctx) | |
129 | { | |
130 | dma_addr_t pa = wil_desc_addr(&d->dma.addr); | |
131 | u16 dmalen = le16_to_cpu(d->dma.length); | |
8fe59627 | 132 | |
2232abd5 VK |
133 | switch (ctx->mapped_as) { |
134 | case wil_mapped_as_single: | |
135 | dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); | |
136 | break; | |
137 | case wil_mapped_as_page: | |
138 | dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); | |
139 | break; | |
140 | default: | |
141 | break; | |
142 | } | |
143 | } | |
144 | ||
2be7d22f VK |
145 | static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, |
146 | int tx) | |
147 | { | |
148 | struct device *dev = wil_to_dev(wil); | |
149 | size_t sz = vring->size * sizeof(vring->va[0]); | |
150 | ||
ef77285f VK |
151 | if (tx) { |
152 | int vring_index = vring - wil->vring_tx; | |
153 | ||
154 | wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", | |
155 | vring_index, vring->size, vring->va, | |
156 | &vring->pa, vring->ctx); | |
157 | } else { | |
158 | wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", | |
159 | vring->size, vring->va, | |
160 | &vring->pa, vring->ctx); | |
161 | } | |
162 | ||
2be7d22f | 163 | while (!wil_vring_is_empty(vring)) { |
68ada71e | 164 | dma_addr_t pa; |
7e594444 | 165 | u16 dmalen; |
f88f113a | 166 | struct wil_ctx *ctx; |
68ada71e | 167 | |
2be7d22f | 168 | if (tx) { |
68ada71e VK |
169 | struct vring_tx_desc dd, *d = ⅆ |
170 | volatile struct vring_tx_desc *_d = | |
2be7d22f | 171 | &vring->va[vring->swtail].tx; |
68ada71e | 172 | |
f88f113a | 173 | ctx = &vring->ctx[vring->swtail]; |
68ada71e | 174 | *d = *_d; |
2232abd5 | 175 | wil_txdesc_unmap(dev, d, ctx); |
f88f113a VK |
176 | if (ctx->skb) |
177 | dev_kfree_skb_any(ctx->skb); | |
2be7d22f VK |
178 | vring->swtail = wil_vring_next_tail(vring); |
179 | } else { /* rx */ | |
68ada71e VK |
180 | struct vring_rx_desc dd, *d = ⅆ |
181 | volatile struct vring_rx_desc *_d = | |
4d1ac072 | 182 | &vring->va[vring->swhead].rx; |
68ada71e | 183 | |
f88f113a | 184 | ctx = &vring->ctx[vring->swhead]; |
68ada71e VK |
185 | *d = *_d; |
186 | pa = wil_desc_addr(&d->dma.addr); | |
7e594444 VK |
187 | dmalen = le16_to_cpu(d->dma.length); |
188 | dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); | |
f88f113a | 189 | kfree_skb(ctx->skb); |
2be7d22f VK |
190 | wil_vring_advance_head(vring, 1); |
191 | } | |
192 | } | |
193 | dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); | |
194 | kfree(vring->ctx); | |
195 | vring->pa = 0; | |
196 | vring->va = NULL; | |
197 | vring->ctx = NULL; | |
198 | } | |
199 | ||
200 | /** | |
201 | * Allocate one skb for Rx VRING | |
202 | * | |
203 | * Safe to call from IRQ | |
204 | */ | |
205 | static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, | |
206 | u32 i, int headroom) | |
207 | { | |
208 | struct device *dev = wil_to_dev(wil); | |
9a06bec9 | 209 | unsigned int sz = mtu_max + ETH_HLEN; |
68ada71e | 210 | struct vring_rx_desc dd, *d = ⅆ |
8fe59627 | 211 | volatile struct vring_rx_desc *_d = &vring->va[i].rx; |
2be7d22f | 212 | dma_addr_t pa; |
2be7d22f | 213 | struct sk_buff *skb = dev_alloc_skb(sz + headroom); |
8fe59627 | 214 | |
2be7d22f VK |
215 | if (unlikely(!skb)) |
216 | return -ENOMEM; | |
217 | ||
218 | skb_reserve(skb, headroom); | |
219 | skb_put(skb, sz); | |
220 | ||
221 | pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); | |
222 | if (unlikely(dma_mapping_error(dev, pa))) { | |
223 | kfree_skb(skb); | |
224 | return -ENOMEM; | |
225 | } | |
226 | ||
227 | d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT; | |
68ada71e | 228 | wil_desc_addr_set(&d->dma.addr, pa); |
2be7d22f VK |
229 | /* ip_length don't care */ |
230 | /* b11 don't care */ | |
231 | /* error don't care */ | |
232 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ | |
7e594444 | 233 | d->dma.length = cpu_to_le16(sz); |
68ada71e | 234 | *_d = *d; |
f88f113a | 235 | vring->ctx[i].skb = skb; |
2be7d22f VK |
236 | |
237 | return 0; | |
238 | } | |
239 | ||
240 | /** | |
241 | * Adds radiotap header | |
242 | * | |
243 | * Any error indicated as "Bad FCS" | |
244 | * | |
245 | * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: | |
246 | * - Rx descriptor: 32 bytes | |
247 | * - Phy info | |
248 | */ | |
249 | static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, | |
33e61169 | 250 | struct sk_buff *skb) |
2be7d22f VK |
251 | { |
252 | struct wireless_dev *wdev = wil->wdev; | |
253 | struct wil6210_rtap { | |
254 | struct ieee80211_radiotap_header rthdr; | |
255 | /* fields should be in the order of bits in rthdr.it_present */ | |
256 | /* flags */ | |
257 | u8 flags; | |
258 | /* channel */ | |
259 | __le16 chnl_freq __aligned(2); | |
260 | __le16 chnl_flags; | |
261 | /* MCS */ | |
262 | u8 mcs_present; | |
263 | u8 mcs_flags; | |
264 | u8 mcs_index; | |
265 | } __packed; | |
266 | struct wil6210_rtap_vendor { | |
267 | struct wil6210_rtap rtap; | |
268 | /* vendor */ | |
269 | u8 vendor_oui[3] __aligned(2); | |
270 | u8 vendor_ns; | |
271 | __le16 vendor_skip; | |
272 | u8 vendor_data[0]; | |
273 | } __packed; | |
33e61169 | 274 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
2be7d22f VK |
275 | struct wil6210_rtap_vendor *rtap_vendor; |
276 | int rtap_len = sizeof(struct wil6210_rtap); | |
277 | int phy_length = 0; /* phy info header size, bytes */ | |
278 | static char phy_data[128]; | |
279 | struct ieee80211_channel *ch = wdev->preset_chandef.chan; | |
280 | ||
281 | if (rtap_include_phy_info) { | |
282 | rtap_len = sizeof(*rtap_vendor) + sizeof(*d); | |
283 | /* calculate additional length */ | |
284 | if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { | |
285 | /** | |
286 | * PHY info starts from 8-byte boundary | |
287 | * there are 8-byte lines, last line may be partially | |
288 | * written (HW bug), thus FW configures for last line | |
289 | * to be excessive. Driver skips this last line. | |
290 | */ | |
291 | int len = min_t(int, 8 + sizeof(phy_data), | |
292 | wil_rxdesc_phy_length(d)); | |
8fe59627 | 293 | |
2be7d22f VK |
294 | if (len > 8) { |
295 | void *p = skb_tail_pointer(skb); | |
296 | void *pa = PTR_ALIGN(p, 8); | |
8fe59627 | 297 | |
2be7d22f VK |
298 | if (skb_tailroom(skb) >= len + (pa - p)) { |
299 | phy_length = len - 8; | |
300 | memcpy(phy_data, pa, phy_length); | |
301 | } | |
302 | } | |
303 | } | |
304 | rtap_len += phy_length; | |
305 | } | |
306 | ||
307 | if (skb_headroom(skb) < rtap_len && | |
308 | pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { | |
309 | wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); | |
310 | return; | |
311 | } | |
312 | ||
313 | rtap_vendor = (void *)skb_push(skb, rtap_len); | |
314 | memset(rtap_vendor, 0, rtap_len); | |
315 | ||
316 | rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; | |
317 | rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); | |
318 | rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( | |
319 | (1 << IEEE80211_RADIOTAP_FLAGS) | | |
320 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
321 | (1 << IEEE80211_RADIOTAP_MCS)); | |
322 | if (d->dma.status & RX_DMA_STATUS_ERROR) | |
323 | rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; | |
324 | ||
325 | rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); | |
326 | rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); | |
327 | ||
328 | rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; | |
329 | rtap_vendor->rtap.mcs_flags = 0; | |
330 | rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); | |
331 | ||
332 | if (rtap_include_phy_info) { | |
333 | rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << | |
334 | IEEE80211_RADIOTAP_VENDOR_NAMESPACE); | |
335 | /* OUI for Wilocity 04:ce:14 */ | |
336 | rtap_vendor->vendor_oui[0] = 0x04; | |
337 | rtap_vendor->vendor_oui[1] = 0xce; | |
338 | rtap_vendor->vendor_oui[2] = 0x14; | |
339 | rtap_vendor->vendor_ns = 1; | |
340 | /* Rx descriptor + PHY data */ | |
341 | rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + | |
342 | phy_length); | |
343 | memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); | |
344 | memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, | |
345 | phy_length); | |
346 | } | |
347 | } | |
348 | ||
349 | /* | |
350 | * Fast swap in place between 2 registers | |
351 | */ | |
352 | static void wil_swap_u16(u16 *a, u16 *b) | |
353 | { | |
354 | *a ^= *b; | |
355 | *b ^= *a; | |
356 | *a ^= *b; | |
357 | } | |
358 | ||
359 | static void wil_swap_ethaddr(void *data) | |
360 | { | |
361 | struct ethhdr *eth = data; | |
362 | u16 *s = (u16 *)eth->h_source; | |
363 | u16 *d = (u16 *)eth->h_dest; | |
364 | ||
365 | wil_swap_u16(s++, d++); | |
366 | wil_swap_u16(s++, d++); | |
367 | wil_swap_u16(s, d); | |
368 | } | |
369 | ||
370 | /** | |
371 | * reap 1 frame from @swhead | |
372 | * | |
33e61169 VK |
373 | * Rx descriptor copied to skb->cb |
374 | * | |
2be7d22f VK |
375 | * Safe to call from IRQ |
376 | */ | |
377 | static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, | |
378 | struct vring *vring) | |
379 | { | |
380 | struct device *dev = wil_to_dev(wil); | |
381 | struct net_device *ndev = wil_to_ndev(wil); | |
68ada71e VK |
382 | volatile struct vring_rx_desc *_d; |
383 | struct vring_rx_desc *d; | |
2be7d22f VK |
384 | struct sk_buff *skb; |
385 | dma_addr_t pa; | |
9a06bec9 | 386 | unsigned int sz = mtu_max + ETH_HLEN; |
7e594444 | 387 | u16 dmalen; |
2be7d22f VK |
388 | u8 ftype; |
389 | u8 ds_bits; | |
c8b78b5f VK |
390 | int cid; |
391 | struct wil_net_stats *stats; | |
392 | ||
33e61169 VK |
393 | BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); |
394 | ||
2be7d22f VK |
395 | if (wil_vring_is_empty(vring)) |
396 | return NULL; | |
397 | ||
8fe59627 | 398 | _d = &vring->va[vring->swhead].rx; |
68ada71e | 399 | if (!(_d->dma.status & RX_DMA_STATUS_DU)) { |
2be7d22f VK |
400 | /* it is not error, we just reached end of Rx done area */ |
401 | return NULL; | |
402 | } | |
403 | ||
f88f113a | 404 | skb = vring->ctx[vring->swhead].skb; |
68ada71e VK |
405 | d = wil_skb_rxdesc(skb); |
406 | *d = *_d; | |
407 | pa = wil_desc_addr(&d->dma.addr); | |
f88f113a | 408 | vring->ctx[vring->swhead].skb = NULL; |
68ada71e VK |
409 | wil_vring_advance_head(vring, 1); |
410 | ||
2be7d22f | 411 | dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); |
68ada71e VK |
412 | dmalen = le16_to_cpu(d->dma.length); |
413 | ||
414 | trace_wil6210_rx(vring->swhead, d); | |
415 | wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, dmalen); | |
416 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4, | |
417 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 418 | |
e270045b VK |
419 | if (dmalen > sz) { |
420 | wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); | |
110dea00 | 421 | kfree_skb(skb); |
e270045b VK |
422 | return NULL; |
423 | } | |
7e594444 | 424 | skb_trim(skb, dmalen); |
33e61169 | 425 | |
1cbbcb08 VK |
426 | prefetch(skb->data); |
427 | ||
c0d37713 VK |
428 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, |
429 | skb->data, skb_headlen(skb), false); | |
430 | ||
c8b78b5f VK |
431 | cid = wil_rxdesc_cid(d); |
432 | stats = &wil->sta[cid].stats; | |
433 | stats->last_mcs_rx = wil_rxdesc_mcs(d); | |
2be7d22f VK |
434 | |
435 | /* use radiotap header only if required */ | |
436 | if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) | |
33e61169 | 437 | wil_rx_add_radiotap_header(wil, skb); |
2be7d22f | 438 | |
2be7d22f VK |
439 | /* no extra checks if in sniffer mode */ |
440 | if (ndev->type != ARPHRD_ETHER) | |
441 | return skb; | |
442 | /* | |
443 | * Non-data frames may be delivered through Rx DMA channel (ex: BAR) | |
444 | * Driver should recognize it by frame type, that is found | |
445 | * in Rx descriptor. If type is not data, it is 802.11 frame as is | |
446 | */ | |
68ada71e | 447 | ftype = wil_rxdesc_ftype(d) << 2; |
2be7d22f | 448 | if (ftype != IEEE80211_FTYPE_DATA) { |
7743882d | 449 | wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype); |
2be7d22f VK |
450 | /* TODO: process it */ |
451 | kfree_skb(skb); | |
452 | return NULL; | |
453 | } | |
454 | ||
455 | if (skb->len < ETH_HLEN) { | |
456 | wil_err(wil, "Short frame, len = %d\n", skb->len); | |
457 | /* TODO: process it (i.e. BAR) */ | |
458 | kfree_skb(skb); | |
459 | return NULL; | |
460 | } | |
461 | ||
504937d4 KE |
462 | /* L4 IDENT is on when HW calculated checksum, check status |
463 | * and in case of error drop the packet | |
464 | * higher stack layers will handle retransmission (if required) | |
465 | */ | |
466 | if (d->dma.status & RX_DMA_STATUS_L4_IDENT) { | |
467 | /* L4 protocol identified, csum calculated */ | |
4a68ab10 | 468 | if ((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0) |
504937d4 | 469 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
4a68ab10 VK |
470 | /* If HW reports bad checksum, let IP stack re-check it |
471 | * For example, HW don't understand Microsoft IP stack that | |
472 | * mis-calculates TCP checksum - if it should be 0x0, | |
473 | * it writes 0xffff in violation of RFC 1624 | |
474 | */ | |
504937d4 KE |
475 | } |
476 | ||
68ada71e | 477 | ds_bits = wil_rxdesc_ds_bits(d); |
2be7d22f VK |
478 | if (ds_bits == 1) { |
479 | /* | |
480 | * HW bug - in ToDS mode, i.e. Rx on AP side, | |
481 | * addresses get swapped | |
482 | */ | |
483 | wil_swap_ethaddr(skb->data); | |
484 | } | |
485 | ||
486 | return skb; | |
487 | } | |
488 | ||
489 | /** | |
490 | * allocate and fill up to @count buffers in rx ring | |
491 | * buffers posted at @swtail | |
492 | */ | |
493 | static int wil_rx_refill(struct wil6210_priv *wil, int count) | |
494 | { | |
495 | struct net_device *ndev = wil_to_ndev(wil); | |
496 | struct vring *v = &wil->vring_rx; | |
497 | u32 next_tail; | |
498 | int rc = 0; | |
499 | int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? | |
500 | WIL6210_RTAP_SIZE : 0; | |
501 | ||
502 | for (; next_tail = wil_vring_next_tail(v), | |
503 | (next_tail != v->swhead) && (count-- > 0); | |
504 | v->swtail = next_tail) { | |
505 | rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); | |
506 | if (rc) { | |
507 | wil_err(wil, "Error %d in wil_rx_refill[%d]\n", | |
508 | rc, v->swtail); | |
509 | break; | |
510 | } | |
511 | } | |
512 | iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail)); | |
513 | ||
514 | return rc; | |
515 | } | |
516 | ||
517 | /* | |
518 | * Pass Rx packet to the netif. Update statistics. | |
e0287c4a | 519 | * Called in softirq context (NAPI poll). |
2be7d22f | 520 | */ |
b4490f42 | 521 | void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) |
2be7d22f | 522 | { |
b5998e6a | 523 | gro_result_t rc; |
c8b78b5f | 524 | struct wil6210_priv *wil = ndev_to_wil(ndev); |
2be7d22f | 525 | unsigned int len = skb->len; |
c8b78b5f VK |
526 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
527 | int cid = wil_rxdesc_cid(d); | |
528 | struct wil_net_stats *stats = &wil->sta[cid].stats; | |
2be7d22f | 529 | |
241804cb VK |
530 | skb_orphan(skb); |
531 | ||
b5998e6a | 532 | rc = napi_gro_receive(&wil->napi_rx, skb); |
2be7d22f | 533 | |
b5998e6a VK |
534 | if (unlikely(rc == GRO_DROP)) { |
535 | ndev->stats.rx_dropped++; | |
536 | stats->rx_dropped++; | |
537 | wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); | |
538 | } else { | |
2be7d22f | 539 | ndev->stats.rx_packets++; |
c8b78b5f | 540 | stats->rx_packets++; |
2be7d22f | 541 | ndev->stats.rx_bytes += len; |
c8b78b5f | 542 | stats->rx_bytes += len; |
2be7d22f | 543 | } |
194b482b VK |
544 | { |
545 | static const char * const gro_res_str[] = { | |
546 | [GRO_MERGED] = "GRO_MERGED", | |
547 | [GRO_MERGED_FREE] = "GRO_MERGED_FREE", | |
548 | [GRO_HELD] = "GRO_HELD", | |
549 | [GRO_NORMAL] = "GRO_NORMAL", | |
550 | [GRO_DROP] = "GRO_DROP", | |
551 | }; | |
8fe59627 | 552 | wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", |
194b482b VK |
553 | len, gro_res_str[rc]); |
554 | } | |
2be7d22f VK |
555 | } |
556 | ||
557 | /** | |
558 | * Proceed all completed skb's from Rx VRING | |
559 | * | |
e0287c4a | 560 | * Safe to call from NAPI poll, i.e. softirq with interrupts enabled |
2be7d22f | 561 | */ |
e0287c4a | 562 | void wil_rx_handle(struct wil6210_priv *wil, int *quota) |
2be7d22f VK |
563 | { |
564 | struct net_device *ndev = wil_to_ndev(wil); | |
565 | struct vring *v = &wil->vring_rx; | |
566 | struct sk_buff *skb; | |
567 | ||
568 | if (!v->va) { | |
569 | wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); | |
570 | return; | |
571 | } | |
7743882d | 572 | wil_dbg_txrx(wil, "%s()\n", __func__); |
e0287c4a VK |
573 | while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { |
574 | (*quota)--; | |
2be7d22f | 575 | |
2be7d22f VK |
576 | if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
577 | skb->dev = ndev; | |
578 | skb_reset_mac_header(skb); | |
579 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
580 | skb->pkt_type = PACKET_OTHERHOST; | |
581 | skb->protocol = htons(ETH_P_802_2); | |
b4490f42 | 582 | wil_netif_rx_any(skb, ndev); |
2be7d22f | 583 | } else { |
0bbc4ade VK |
584 | struct ethhdr *eth = (void *)skb->data; |
585 | ||
2be7d22f | 586 | skb->protocol = eth_type_trans(skb, ndev); |
0bbc4ade VK |
587 | |
588 | if (is_unicast_ether_addr(eth->h_dest)) | |
589 | wil_rx_reorder(wil, skb); | |
590 | else | |
591 | wil_netif_rx_any(skb, ndev); | |
2be7d22f | 592 | } |
2be7d22f VK |
593 | } |
594 | wil_rx_refill(wil, v->size); | |
595 | } | |
596 | ||
d3762b40 | 597 | int wil_rx_init(struct wil6210_priv *wil, u16 size) |
2be7d22f | 598 | { |
2be7d22f VK |
599 | struct vring *vring = &wil->vring_rx; |
600 | int rc; | |
2be7d22f | 601 | |
9cf10d62 VK |
602 | wil_dbg_misc(wil, "%s()\n", __func__); |
603 | ||
8bf6adb9 VK |
604 | if (vring->va) { |
605 | wil_err(wil, "Rx ring already allocated\n"); | |
606 | return -EINVAL; | |
607 | } | |
608 | ||
d3762b40 | 609 | vring->size = size; |
2be7d22f VK |
610 | rc = wil_vring_alloc(wil, vring); |
611 | if (rc) | |
612 | return rc; | |
613 | ||
47e19af9 | 614 | rc = wmi_rx_chain_add(wil, vring); |
2be7d22f VK |
615 | if (rc) |
616 | goto err_free; | |
617 | ||
2be7d22f VK |
618 | rc = wil_rx_refill(wil, vring->size); |
619 | if (rc) | |
620 | goto err_free; | |
621 | ||
622 | return 0; | |
623 | err_free: | |
624 | wil_vring_free(wil, vring, 0); | |
625 | ||
626 | return rc; | |
627 | } | |
628 | ||
629 | void wil_rx_fini(struct wil6210_priv *wil) | |
630 | { | |
631 | struct vring *vring = &wil->vring_rx; | |
632 | ||
9cf10d62 VK |
633 | wil_dbg_misc(wil, "%s()\n", __func__); |
634 | ||
2acb4220 | 635 | if (vring->va) |
2be7d22f | 636 | wil_vring_free(wil, vring, 0); |
2be7d22f VK |
637 | } |
638 | ||
639 | int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, | |
640 | int cid, int tid) | |
641 | { | |
642 | int rc; | |
643 | struct wmi_vring_cfg_cmd cmd = { | |
644 | .action = cpu_to_le32(WMI_VRING_CMD_ADD), | |
645 | .vring_cfg = { | |
646 | .tx_sw_ring = { | |
9a06bec9 | 647 | .max_mpdu_size = |
c44690a1 | 648 | cpu_to_le16(wil_mtu2macbuf(mtu_max)), |
b5d98e9d | 649 | .ring_size = cpu_to_le16(size), |
2be7d22f VK |
650 | }, |
651 | .ringid = id, | |
a70abea5 | 652 | .cidxtid = mk_cidxtid(cid, tid), |
2be7d22f VK |
653 | .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, |
654 | .mac_ctrl = 0, | |
655 | .to_resolution = 0, | |
3277213f | 656 | .agg_max_wsize = 0, |
2be7d22f VK |
657 | .schd_params = { |
658 | .priority = cpu_to_le16(0), | |
659 | .timeslot_us = cpu_to_le16(0xfff), | |
660 | }, | |
661 | }, | |
662 | }; | |
663 | struct { | |
664 | struct wil6210_mbox_hdr_wmi wmi; | |
665 | struct wmi_vring_cfg_done_event cmd; | |
666 | } __packed reply; | |
667 | struct vring *vring = &wil->vring_tx[id]; | |
097638a0 | 668 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
2be7d22f | 669 | |
e0106ada VK |
670 | wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, |
671 | cmd.vring_cfg.tx_sw_ring.max_mpdu_size); | |
9cf10d62 | 672 | |
2be7d22f VK |
673 | if (vring->va) { |
674 | wil_err(wil, "Tx ring [%d] already allocated\n", id); | |
675 | rc = -EINVAL; | |
676 | goto out; | |
677 | } | |
678 | ||
097638a0 | 679 | memset(txdata, 0, sizeof(*txdata)); |
2be7d22f VK |
680 | vring->size = size; |
681 | rc = wil_vring_alloc(wil, vring); | |
682 | if (rc) | |
683 | goto out; | |
684 | ||
93ae6d49 VK |
685 | wil->vring2cid_tid[id][0] = cid; |
686 | wil->vring2cid_tid[id][1] = tid; | |
687 | ||
2be7d22f | 688 | cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); |
2be7d22f VK |
689 | |
690 | rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), | |
691 | WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); | |
692 | if (rc) | |
693 | goto out_free; | |
694 | ||
b8023177 | 695 | if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { |
2be7d22f VK |
696 | wil_err(wil, "Tx config failed, status 0x%02x\n", |
697 | reply.cmd.status); | |
c331997b | 698 | rc = -EINVAL; |
2be7d22f VK |
699 | goto out_free; |
700 | } | |
701 | vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); | |
702 | ||
097638a0 | 703 | txdata->enabled = 1; |
3a3def8d VK |
704 | if (wil->sta[cid].data_port_open && (agg_wsize >= 0)) |
705 | wil_addba_tx_request(wil, id, agg_wsize); | |
097638a0 | 706 | |
2be7d22f VK |
707 | return 0; |
708 | out_free: | |
709 | wil_vring_free(wil, vring, 1); | |
710 | out: | |
711 | ||
712 | return rc; | |
713 | } | |
714 | ||
715 | void wil_vring_fini_tx(struct wil6210_priv *wil, int id) | |
716 | { | |
717 | struct vring *vring = &wil->vring_tx[id]; | |
3a124ed6 | 718 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
2be7d22f | 719 | |
097638a0 VK |
720 | WARN_ON(!mutex_is_locked(&wil->mutex)); |
721 | ||
2be7d22f VK |
722 | if (!vring->va) |
723 | return; | |
724 | ||
9cf10d62 VK |
725 | wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); |
726 | ||
097638a0 VK |
727 | /* make sure NAPI won't touch this vring */ |
728 | wil->vring_tx_data[id].enabled = 0; | |
9419b6a2 | 729 | if (test_bit(wil_status_napi_en, wil->status)) |
097638a0 VK |
730 | napi_synchronize(&wil->napi_tx); |
731 | ||
2be7d22f | 732 | wil_vring_free(wil, vring, 1); |
3a124ed6 | 733 | memset(txdata, 0, sizeof(*txdata)); |
2be7d22f VK |
734 | } |
735 | ||
736 | static struct vring *wil_find_tx_vring(struct wil6210_priv *wil, | |
737 | struct sk_buff *skb) | |
738 | { | |
3df2cd36 VK |
739 | int i; |
740 | struct ethhdr *eth = (void *)skb->data; | |
741 | int cid = wil_find_cid(wil, eth->h_dest); | |
742 | ||
743 | if (cid < 0) | |
744 | return NULL; | |
2be7d22f | 745 | |
e58c9f70 VK |
746 | if (!wil->sta[cid].data_port_open && |
747 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) | |
748 | return NULL; | |
749 | ||
3df2cd36 VK |
750 | /* TODO: fix for multiple TID */ |
751 | for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { | |
752 | if (wil->vring2cid_tid[i][0] == cid) { | |
753 | struct vring *v = &wil->vring_tx[i]; | |
8fe59627 | 754 | |
3df2cd36 VK |
755 | wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", |
756 | __func__, eth->h_dest, i); | |
757 | if (v->va) { | |
758 | return v; | |
759 | } else { | |
760 | wil_dbg_txrx(wil, "vring[%d] not valid\n", i); | |
761 | return NULL; | |
762 | } | |
763 | } | |
764 | } | |
2be7d22f VK |
765 | |
766 | return NULL; | |
767 | } | |
768 | ||
fb3cac57 VK |
769 | static void wil_set_da_for_vring(struct wil6210_priv *wil, |
770 | struct sk_buff *skb, int vring_index) | |
771 | { | |
772 | struct ethhdr *eth = (void *)skb->data; | |
773 | int cid = wil->vring2cid_tid[vring_index][0]; | |
8fe59627 | 774 | |
fb3cac57 VK |
775 | memcpy(eth->h_dest, wil->sta[cid].addr, ETH_ALEN); |
776 | } | |
777 | ||
778 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, | |
779 | struct sk_buff *skb); | |
54ed90a8 VK |
780 | |
781 | static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, | |
782 | struct sk_buff *skb) | |
783 | { | |
784 | struct vring *v; | |
785 | int i; | |
786 | u8 cid; | |
787 | ||
788 | /* In the STA mode, it is expected to have only 1 VRING | |
789 | * for the AP we connected to. | |
790 | * find 1-st vring and see whether it is eligible for data | |
791 | */ | |
792 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { | |
793 | v = &wil->vring_tx[i]; | |
794 | if (!v->va) | |
795 | continue; | |
796 | ||
797 | cid = wil->vring2cid_tid[i][0]; | |
798 | if (!wil->sta[cid].data_port_open && | |
799 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) | |
800 | break; | |
801 | ||
802 | wil_dbg_txrx(wil, "Tx -> ring %d\n", i); | |
803 | ||
804 | return v; | |
805 | } | |
806 | ||
807 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); | |
808 | ||
809 | return NULL; | |
810 | } | |
811 | ||
fb3cac57 VK |
812 | /* |
813 | * Find 1-st vring and return it; set dest address for this vring in skb | |
814 | * duplicate skb and send it to other active vrings | |
815 | */ | |
816 | static struct vring *wil_tx_bcast(struct wil6210_priv *wil, | |
8fe59627 | 817 | struct sk_buff *skb) |
fb3cac57 VK |
818 | { |
819 | struct vring *v, *v2; | |
820 | struct sk_buff *skb2; | |
821 | int i; | |
e58c9f70 | 822 | u8 cid; |
fb3cac57 | 823 | |
e58c9f70 | 824 | /* find 1-st vring eligible for data */ |
fb3cac57 VK |
825 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { |
826 | v = &wil->vring_tx[i]; | |
e58c9f70 VK |
827 | if (!v->va) |
828 | continue; | |
829 | ||
830 | cid = wil->vring2cid_tid[i][0]; | |
831 | if (!wil->sta[cid].data_port_open) | |
832 | continue; | |
833 | ||
834 | goto found; | |
fb3cac57 VK |
835 | } |
836 | ||
5aed1393 | 837 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); |
fb3cac57 VK |
838 | |
839 | return NULL; | |
840 | ||
841 | found: | |
842 | wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); | |
843 | wil_set_da_for_vring(wil, skb, i); | |
844 | ||
845 | /* find other active vrings and duplicate skb for each */ | |
846 | for (i++; i < WIL6210_MAX_TX_RINGS; i++) { | |
847 | v2 = &wil->vring_tx[i]; | |
848 | if (!v2->va) | |
849 | continue; | |
e58c9f70 VK |
850 | cid = wil->vring2cid_tid[i][0]; |
851 | if (!wil->sta[cid].data_port_open) | |
852 | continue; | |
853 | ||
fb3cac57 VK |
854 | skb2 = skb_copy(skb, GFP_ATOMIC); |
855 | if (skb2) { | |
856 | wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); | |
857 | wil_set_da_for_vring(wil, skb2, i); | |
858 | wil_tx_vring(wil, v2, skb2); | |
859 | } else { | |
860 | wil_err(wil, "skb_copy failed\n"); | |
861 | } | |
862 | } | |
863 | ||
864 | return v; | |
865 | } | |
866 | ||
99b55bd2 KE |
867 | static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, |
868 | int vring_index) | |
2be7d22f | 869 | { |
68ada71e | 870 | wil_desc_addr_set(&d->dma.addr, pa); |
2be7d22f VK |
871 | d->dma.ip_length = 0; |
872 | /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ | |
873 | d->dma.b11 = 0/*14 | BIT(7)*/; | |
874 | d->dma.error = 0; | |
875 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ | |
7e594444 | 876 | d->dma.length = cpu_to_le16((u16)len); |
99b55bd2 | 877 | d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); |
2be7d22f VK |
878 | d->mac.d[0] = 0; |
879 | d->mac.d[1] = 0; | |
880 | d->mac.d[2] = 0; | |
881 | d->mac.ucode_cmd = 0; | |
882 | /* use dst index 0 */ | |
883 | d->mac.d[1] |= BIT(MAC_CFG_DESC_TX_1_DST_INDEX_EN_POS) | | |
884 | (0 << MAC_CFG_DESC_TX_1_DST_INDEX_POS); | |
885 | /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ | |
886 | d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | | |
887 | (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
c236658f VK |
892 | static inline |
893 | void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) | |
894 | { | |
895 | d->mac.d[2] |= ((nr_frags + 1) << | |
896 | MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); | |
897 | } | |
898 | ||
504937d4 | 899 | static int wil_tx_desc_offload_cksum_set(struct wil6210_priv *wil, |
8fe59627 VK |
900 | struct vring_tx_desc *d, |
901 | struct sk_buff *skb) | |
504937d4 KE |
902 | { |
903 | int protocol; | |
904 | ||
905 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
906 | return 0; | |
907 | ||
df2d08ee VK |
908 | d->dma.b11 = ETH_HLEN; /* MAC header length */ |
909 | ||
504937d4 KE |
910 | switch (skb->protocol) { |
911 | case cpu_to_be16(ETH_P_IP): | |
912 | protocol = ip_hdr(skb)->protocol; | |
df2d08ee | 913 | d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); |
504937d4 KE |
914 | break; |
915 | case cpu_to_be16(ETH_P_IPV6): | |
916 | protocol = ipv6_hdr(skb)->nexthdr; | |
917 | break; | |
918 | default: | |
919 | return -EINVAL; | |
920 | } | |
921 | ||
922 | switch (protocol) { | |
923 | case IPPROTO_TCP: | |
924 | d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); | |
925 | /* L4 header len: TCP header length */ | |
926 | d->dma.d0 |= | |
927 | (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); | |
928 | break; | |
929 | case IPPROTO_UDP: | |
930 | /* L4 header len: UDP header length */ | |
931 | d->dma.d0 |= | |
932 | (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); | |
933 | break; | |
934 | default: | |
935 | return -EINVAL; | |
936 | } | |
937 | ||
938 | d->dma.ip_length = skb_network_header_len(skb); | |
504937d4 KE |
939 | /* Enable TCP/UDP checksum */ |
940 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); | |
941 | /* Calculate pseudo-header */ | |
942 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
2be7d22f VK |
947 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
948 | struct sk_buff *skb) | |
949 | { | |
950 | struct device *dev = wil_to_dev(wil); | |
68ada71e VK |
951 | struct vring_tx_desc dd, *d = ⅆ |
952 | volatile struct vring_tx_desc *_d; | |
2be7d22f VK |
953 | u32 swhead = vring->swhead; |
954 | int avail = wil_vring_avail_tx(vring); | |
955 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
504937d4 | 956 | uint f = 0; |
2be7d22f | 957 | int vring_index = vring - wil->vring_tx; |
7c0acf86 | 958 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; |
2be7d22f VK |
959 | uint i = swhead; |
960 | dma_addr_t pa; | |
961 | ||
7743882d | 962 | wil_dbg_txrx(wil, "%s()\n", __func__); |
2be7d22f | 963 | |
2be7d22f | 964 | if (avail < 1 + nr_frags) { |
70801e1b VK |
965 | wil_err_ratelimited(wil, |
966 | "Tx ring full. No space for %d fragments\n", | |
967 | 1 + nr_frags); | |
2be7d22f VK |
968 | return -ENOMEM; |
969 | } | |
8fe59627 | 970 | _d = &vring->va[i].tx; |
2be7d22f | 971 | |
8fe59627 | 972 | pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); |
2be7d22f | 973 | |
39c52ee8 VK |
974 | wil_dbg_txrx(wil, "Tx skb %d bytes 0x%p -> %pad\n", skb_headlen(skb), |
975 | skb->data, &pa); | |
7743882d | 976 | wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, |
2be7d22f VK |
977 | skb->data, skb_headlen(skb), false); |
978 | ||
979 | if (unlikely(dma_mapping_error(dev, pa))) | |
980 | return -EINVAL; | |
2232abd5 | 981 | vring->ctx[i].mapped_as = wil_mapped_as_single; |
2be7d22f | 982 | /* 1-st segment */ |
99b55bd2 | 983 | wil_tx_desc_map(d, pa, skb_headlen(skb), vring_index); |
504937d4 KE |
984 | /* Process TCP/UDP checksum offloading */ |
985 | if (wil_tx_desc_offload_cksum_set(wil, d, skb)) { | |
986 | wil_err(wil, "VRING #%d Failed to set cksum, drop packet\n", | |
987 | vring_index); | |
988 | goto dma_error; | |
989 | } | |
990 | ||
c236658f VK |
991 | vring->ctx[i].nr_frags = nr_frags; |
992 | wil_tx_desc_set_nr_frags(d, nr_frags); | |
68ada71e VK |
993 | if (nr_frags) |
994 | *_d = *d; | |
995 | ||
2be7d22f | 996 | /* middle segments */ |
504937d4 | 997 | for (; f < nr_frags; f++) { |
2be7d22f VK |
998 | const struct skb_frag_struct *frag = |
999 | &skb_shinfo(skb)->frags[f]; | |
1000 | int len = skb_frag_size(frag); | |
8fe59627 | 1001 | |
2be7d22f | 1002 | i = (swhead + f + 1) % vring->size; |
8fe59627 | 1003 | _d = &vring->va[i].tx; |
2be7d22f | 1004 | pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), |
8fe59627 | 1005 | DMA_TO_DEVICE); |
2be7d22f VK |
1006 | if (unlikely(dma_mapping_error(dev, pa))) |
1007 | goto dma_error; | |
2232abd5 | 1008 | vring->ctx[i].mapped_as = wil_mapped_as_page; |
99b55bd2 | 1009 | wil_tx_desc_map(d, pa, len, vring_index); |
c236658f VK |
1010 | /* no need to check return code - |
1011 | * if it succeeded for 1-st descriptor, | |
1012 | * it will succeed here too | |
1013 | */ | |
1014 | wil_tx_desc_offload_cksum_set(wil, d, skb); | |
68ada71e | 1015 | *_d = *d; |
2be7d22f VK |
1016 | } |
1017 | /* for the last seg only */ | |
1018 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); | |
668b2bbd | 1019 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); |
2be7d22f | 1020 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); |
68ada71e | 1021 | *_d = *d; |
2be7d22f | 1022 | |
6cdadd4d VK |
1023 | /* hold reference to skb |
1024 | * to prevent skb release before accounting | |
1025 | * in case of immediate "tx done" | |
1026 | */ | |
1027 | vring->ctx[i].skb = skb_get(skb); | |
1028 | ||
7743882d | 1029 | wil_hex_dump_txrx("Tx ", DUMP_PREFIX_NONE, 32, 4, |
2be7d22f VK |
1030 | (const void *)d, sizeof(*d), false); |
1031 | ||
7c0acf86 VK |
1032 | if (wil_vring_is_empty(vring)) /* performance monitoring */ |
1033 | txdata->idle += get_cycles() - txdata->last_idle; | |
1034 | ||
2be7d22f VK |
1035 | /* advance swhead */ |
1036 | wil_vring_advance_head(vring, nr_frags + 1); | |
7743882d | 1037 | wil_dbg_txrx(wil, "Tx swhead %d -> %d\n", swhead, vring->swhead); |
98658095 | 1038 | trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); |
2be7d22f | 1039 | iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail)); |
2be7d22f VK |
1040 | |
1041 | return 0; | |
1042 | dma_error: | |
1043 | /* unmap what we have mapped */ | |
c2a146f6 VK |
1044 | nr_frags = f + 1; /* frags mapped + one for skb head */ |
1045 | for (f = 0; f < nr_frags; f++) { | |
c2a146f6 | 1046 | struct wil_ctx *ctx; |
7e594444 | 1047 | |
2be7d22f | 1048 | i = (swhead + f) % vring->size; |
c2a146f6 | 1049 | ctx = &vring->ctx[i]; |
8fe59627 | 1050 | _d = &vring->va[i].tx; |
68ada71e VK |
1051 | *d = *_d; |
1052 | _d->dma.status = TX_DMA_STATUS_DU; | |
2232abd5 | 1053 | wil_txdesc_unmap(dev, d, ctx); |
f88f113a VK |
1054 | |
1055 | if (ctx->skb) | |
1056 | dev_kfree_skb_any(ctx->skb); | |
1057 | ||
1058 | memset(ctx, 0, sizeof(*ctx)); | |
2be7d22f VK |
1059 | } |
1060 | ||
1061 | return -EINVAL; | |
1062 | } | |
1063 | ||
2be7d22f VK |
1064 | netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
1065 | { | |
1066 | struct wil6210_priv *wil = ndev_to_wil(ndev); | |
3df2cd36 | 1067 | struct ethhdr *eth = (void *)skb->data; |
2be7d22f | 1068 | struct vring *vring; |
aa27deaa | 1069 | static bool pr_once_fw; |
2be7d22f VK |
1070 | int rc; |
1071 | ||
7743882d | 1072 | wil_dbg_txrx(wil, "%s()\n", __func__); |
9419b6a2 | 1073 | if (!test_bit(wil_status_fwready, wil->status)) { |
aa27deaa VK |
1074 | if (!pr_once_fw) { |
1075 | wil_err(wil, "FW not ready\n"); | |
1076 | pr_once_fw = true; | |
1077 | } | |
2be7d22f VK |
1078 | goto drop; |
1079 | } | |
9419b6a2 | 1080 | if (!test_bit(wil_status_fwconnected, wil->status)) { |
2be7d22f VK |
1081 | wil_err(wil, "FW not connected\n"); |
1082 | goto drop; | |
1083 | } | |
1084 | if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { | |
1085 | wil_err(wil, "Xmit in monitor mode not supported\n"); | |
1086 | goto drop; | |
1087 | } | |
aa27deaa | 1088 | pr_once_fw = false; |
d58db4e4 VK |
1089 | |
1090 | /* find vring */ | |
54ed90a8 VK |
1091 | if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { |
1092 | /* in STA mode (ESS), all to same VRING */ | |
1093 | vring = wil_find_tx_vring_sta(wil, skb); | |
1094 | } else { /* direct communication, find matching VRING */ | |
1095 | if (is_unicast_ether_addr(eth->h_dest)) | |
1096 | vring = wil_find_tx_vring(wil, skb); | |
1097 | else | |
1098 | vring = wil_tx_bcast(wil, skb); | |
1099 | } | |
d58db4e4 | 1100 | if (!vring) { |
5aed1393 | 1101 | wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); |
d58db4e4 | 1102 | goto drop; |
2be7d22f | 1103 | } |
d58db4e4 VK |
1104 | /* set up vring entry */ |
1105 | rc = wil_tx_vring(wil, vring, skb); | |
1106 | ||
2232abd5 | 1107 | /* do we still have enough room in the vring? */ |
55f8f680 | 1108 | if (wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring)) { |
2232abd5 | 1109 | netif_tx_stop_all_queues(wil_to_ndev(wil)); |
55f8f680 VK |
1110 | wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); |
1111 | } | |
2232abd5 | 1112 | |
2be7d22f VK |
1113 | switch (rc) { |
1114 | case 0: | |
795ce734 | 1115 | /* statistics will be updated on the tx_complete */ |
2be7d22f VK |
1116 | dev_kfree_skb_any(skb); |
1117 | return NETDEV_TX_OK; | |
1118 | case -ENOMEM: | |
1119 | return NETDEV_TX_BUSY; | |
1120 | default: | |
afda8bb5 | 1121 | break; /* goto drop; */ |
2be7d22f VK |
1122 | } |
1123 | drop: | |
2be7d22f VK |
1124 | ndev->stats.tx_dropped++; |
1125 | dev_kfree_skb_any(skb); | |
1126 | ||
1127 | return NET_XMIT_DROP; | |
1128 | } | |
1129 | ||
1130 | /** | |
1131 | * Clean up transmitted skb's from the Tx VRING | |
1132 | * | |
e0287c4a VK |
1133 | * Return number of descriptors cleared |
1134 | * | |
2be7d22f VK |
1135 | * Safe to call from IRQ |
1136 | */ | |
e0287c4a | 1137 | int wil_tx_complete(struct wil6210_priv *wil, int ringid) |
2be7d22f | 1138 | { |
795ce734 | 1139 | struct net_device *ndev = wil_to_ndev(wil); |
2be7d22f VK |
1140 | struct device *dev = wil_to_dev(wil); |
1141 | struct vring *vring = &wil->vring_tx[ringid]; | |
097638a0 | 1142 | struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; |
e0287c4a | 1143 | int done = 0; |
c8b78b5f VK |
1144 | int cid = wil->vring2cid_tid[ringid][0]; |
1145 | struct wil_net_stats *stats = &wil->sta[cid].stats; | |
c236658f | 1146 | volatile struct vring_tx_desc *_d; |
2be7d22f VK |
1147 | |
1148 | if (!vring->va) { | |
1149 | wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); | |
e0287c4a | 1150 | return 0; |
2be7d22f VK |
1151 | } |
1152 | ||
097638a0 VK |
1153 | if (!txdata->enabled) { |
1154 | wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
7743882d | 1158 | wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); |
2be7d22f VK |
1159 | |
1160 | while (!wil_vring_is_empty(vring)) { | |
c236658f | 1161 | int new_swtail; |
f88f113a | 1162 | struct wil_ctx *ctx = &vring->ctx[vring->swtail]; |
c236658f VK |
1163 | /** |
1164 | * For the fragmented skb, HW will set DU bit only for the | |
1165 | * last fragment. look for it | |
1166 | */ | |
1167 | int lf = (vring->swtail + ctx->nr_frags) % vring->size; | |
1168 | /* TODO: check we are not past head */ | |
4de41bef | 1169 | |
c236658f VK |
1170 | _d = &vring->va[lf].tx; |
1171 | if (!(_d->dma.status & TX_DMA_STATUS_DU)) | |
2be7d22f VK |
1172 | break; |
1173 | ||
c236658f VK |
1174 | new_swtail = (lf + 1) % vring->size; |
1175 | while (vring->swtail != new_swtail) { | |
1176 | struct vring_tx_desc dd, *d = ⅆ | |
c236658f | 1177 | u16 dmalen; |
76dfa4b7 VK |
1178 | struct sk_buff *skb; |
1179 | ||
1180 | ctx = &vring->ctx[vring->swtail]; | |
1181 | skb = ctx->skb; | |
c236658f | 1182 | _d = &vring->va[vring->swtail].tx; |
2be7d22f | 1183 | |
c236658f | 1184 | *d = *_d; |
f88f113a | 1185 | |
c236658f VK |
1186 | dmalen = le16_to_cpu(d->dma.length); |
1187 | trace_wil6210_tx_done(ringid, vring->swtail, dmalen, | |
1188 | d->dma.error); | |
1189 | wil_dbg_txrx(wil, | |
1190 | "Tx[%3d] : %d bytes, status 0x%02x err 0x%02x\n", | |
1191 | vring->swtail, dmalen, d->dma.status, | |
1192 | d->dma.error); | |
1193 | wil_hex_dump_txrx("TxC ", DUMP_PREFIX_NONE, 32, 4, | |
1194 | (const void *)d, sizeof(*d), false); | |
795ce734 | 1195 | |
2232abd5 | 1196 | wil_txdesc_unmap(dev, d, ctx); |
c236658f VK |
1197 | |
1198 | if (skb) { | |
1199 | if (d->dma.error == 0) { | |
1200 | ndev->stats.tx_packets++; | |
1201 | stats->tx_packets++; | |
1202 | ndev->stats.tx_bytes += skb->len; | |
1203 | stats->tx_bytes += skb->len; | |
1204 | } else { | |
1205 | ndev->stats.tx_errors++; | |
1206 | stats->tx_errors++; | |
1207 | } | |
1208 | ||
1209 | dev_kfree_skb_any(skb); | |
1210 | } | |
1211 | memset(ctx, 0, sizeof(*ctx)); | |
1212 | /* There is no need to touch HW descriptor: | |
1213 | * - ststus bit TX_DMA_STATUS_DU is set by design, | |
1214 | * so hardware will not try to process this desc., | |
1215 | * - rest of descriptor will be initialized on Tx. | |
1216 | */ | |
1217 | vring->swtail = wil_vring_next_tail(vring); | |
1218 | done++; | |
2be7d22f | 1219 | } |
2be7d22f | 1220 | } |
67c3e1b4 | 1221 | |
7c0acf86 | 1222 | if (wil_vring_is_empty(vring)) { /* performance monitoring */ |
67c3e1b4 | 1223 | wil_dbg_txrx(wil, "Ring[%2d] empty\n", ringid); |
7c0acf86 VK |
1224 | txdata->last_idle = get_cycles(); |
1225 | } | |
67c3e1b4 | 1226 | |
55f8f680 VK |
1227 | if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { |
1228 | wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); | |
2be7d22f | 1229 | netif_tx_wake_all_queues(wil_to_ndev(wil)); |
55f8f680 | 1230 | } |
e0287c4a VK |
1231 | |
1232 | return done; | |
2be7d22f | 1233 | } |