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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 | |
0436fd9a VS |
56 | /* Used space in Tx Vring */ |
57 | static inline int wil_vring_used_tx(struct vring *vring) | |
2be7d22f VK |
58 | { |
59 | u32 swhead = vring->swhead; | |
60 | u32 swtail = vring->swtail; | |
0436fd9a VS |
61 | return (vring->size + swhead - swtail) % vring->size; |
62 | } | |
2be7d22f | 63 | |
0436fd9a VS |
64 | /* Available space in Tx Vring */ |
65 | static inline int wil_vring_avail_tx(struct vring *vring) | |
66 | { | |
67 | return vring->size - wil_vring_used_tx(vring) - 1; | |
2be7d22f VK |
68 | } |
69 | ||
0436fd9a | 70 | /* wil_vring_wmark_low - low watermark for available descriptor space */ |
5bb6423e VK |
71 | static inline int wil_vring_wmark_low(struct vring *vring) |
72 | { | |
73 | return vring->size/8; | |
74 | } | |
75 | ||
0436fd9a | 76 | /* wil_vring_wmark_high - high watermark for available descriptor space */ |
5bb6423e VK |
77 | static inline int wil_vring_wmark_high(struct vring *vring) |
78 | { | |
79 | return vring->size/4; | |
80 | } | |
81 | ||
0436fd9a VS |
82 | /* wil_val_in_range - check if value in [min,max) */ |
83 | static inline bool wil_val_in_range(int val, int min, int max) | |
84 | { | |
85 | return val >= min && val < max; | |
86 | } | |
87 | ||
2be7d22f VK |
88 | static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) |
89 | { | |
90 | struct device *dev = wil_to_dev(wil); | |
91 | size_t sz = vring->size * sizeof(vring->va[0]); | |
92 | uint i; | |
93 | ||
9cf10d62 VK |
94 | wil_dbg_misc(wil, "%s()\n", __func__); |
95 | ||
2be7d22f VK |
96 | BUILD_BUG_ON(sizeof(vring->va[0]) != 32); |
97 | ||
98 | vring->swhead = 0; | |
99 | vring->swtail = 0; | |
f88f113a | 100 | vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); |
2be7d22f | 101 | if (!vring->ctx) { |
2be7d22f VK |
102 | vring->va = NULL; |
103 | return -ENOMEM; | |
104 | } | |
0436fd9a | 105 | /* vring->va should be aligned on its size rounded up to power of 2 |
2be7d22f VK |
106 | * This is granted by the dma_alloc_coherent |
107 | */ | |
108 | vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); | |
109 | if (!vring->va) { | |
2be7d22f VK |
110 | kfree(vring->ctx); |
111 | vring->ctx = NULL; | |
112 | return -ENOMEM; | |
113 | } | |
114 | /* initially, all descriptors are SW owned | |
115 | * For Tx and Rx, ownership bit is at the same location, thus | |
116 | * we can use any | |
117 | */ | |
118 | for (i = 0; i < vring->size; i++) { | |
8fe59627 VK |
119 | volatile struct vring_tx_desc *_d = &vring->va[i].tx; |
120 | ||
68ada71e | 121 | _d->dma.status = TX_DMA_STATUS_DU; |
2be7d22f VK |
122 | } |
123 | ||
39c52ee8 VK |
124 | wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, |
125 | vring->va, &vring->pa, vring->ctx); | |
2be7d22f VK |
126 | |
127 | return 0; | |
128 | } | |
129 | ||
2232abd5 VK |
130 | static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, |
131 | struct wil_ctx *ctx) | |
132 | { | |
133 | dma_addr_t pa = wil_desc_addr(&d->dma.addr); | |
134 | u16 dmalen = le16_to_cpu(d->dma.length); | |
8fe59627 | 135 | |
2232abd5 VK |
136 | switch (ctx->mapped_as) { |
137 | case wil_mapped_as_single: | |
138 | dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); | |
139 | break; | |
140 | case wil_mapped_as_page: | |
141 | dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); | |
142 | break; | |
143 | default: | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
2be7d22f VK |
148 | static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, |
149 | int tx) | |
150 | { | |
151 | struct device *dev = wil_to_dev(wil); | |
152 | size_t sz = vring->size * sizeof(vring->va[0]); | |
153 | ||
ef77285f VK |
154 | if (tx) { |
155 | int vring_index = vring - wil->vring_tx; | |
156 | ||
157 | wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", | |
158 | vring_index, vring->size, vring->va, | |
159 | &vring->pa, vring->ctx); | |
160 | } else { | |
161 | wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", | |
162 | vring->size, vring->va, | |
163 | &vring->pa, vring->ctx); | |
164 | } | |
165 | ||
2be7d22f | 166 | while (!wil_vring_is_empty(vring)) { |
68ada71e | 167 | dma_addr_t pa; |
7e594444 | 168 | u16 dmalen; |
f88f113a | 169 | struct wil_ctx *ctx; |
68ada71e | 170 | |
2be7d22f | 171 | if (tx) { |
68ada71e VK |
172 | struct vring_tx_desc dd, *d = ⅆ |
173 | volatile struct vring_tx_desc *_d = | |
2be7d22f | 174 | &vring->va[vring->swtail].tx; |
68ada71e | 175 | |
f88f113a | 176 | ctx = &vring->ctx[vring->swtail]; |
68ada71e | 177 | *d = *_d; |
2232abd5 | 178 | wil_txdesc_unmap(dev, d, ctx); |
f88f113a VK |
179 | if (ctx->skb) |
180 | dev_kfree_skb_any(ctx->skb); | |
2be7d22f VK |
181 | vring->swtail = wil_vring_next_tail(vring); |
182 | } else { /* rx */ | |
68ada71e VK |
183 | struct vring_rx_desc dd, *d = ⅆ |
184 | volatile struct vring_rx_desc *_d = | |
4d1ac072 | 185 | &vring->va[vring->swhead].rx; |
68ada71e | 186 | |
f88f113a | 187 | ctx = &vring->ctx[vring->swhead]; |
68ada71e VK |
188 | *d = *_d; |
189 | pa = wil_desc_addr(&d->dma.addr); | |
7e594444 VK |
190 | dmalen = le16_to_cpu(d->dma.length); |
191 | dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); | |
f88f113a | 192 | kfree_skb(ctx->skb); |
2be7d22f VK |
193 | wil_vring_advance_head(vring, 1); |
194 | } | |
195 | } | |
196 | dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); | |
197 | kfree(vring->ctx); | |
198 | vring->pa = 0; | |
199 | vring->va = NULL; | |
200 | vring->ctx = NULL; | |
201 | } | |
202 | ||
203 | /** | |
204 | * Allocate one skb for Rx VRING | |
205 | * | |
206 | * Safe to call from IRQ | |
207 | */ | |
208 | static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, | |
209 | u32 i, int headroom) | |
210 | { | |
211 | struct device *dev = wil_to_dev(wil); | |
9a06bec9 | 212 | unsigned int sz = mtu_max + ETH_HLEN; |
68ada71e | 213 | struct vring_rx_desc dd, *d = ⅆ |
8fe59627 | 214 | volatile struct vring_rx_desc *_d = &vring->va[i].rx; |
2be7d22f | 215 | dma_addr_t pa; |
2be7d22f | 216 | struct sk_buff *skb = dev_alloc_skb(sz + headroom); |
8fe59627 | 217 | |
2be7d22f VK |
218 | if (unlikely(!skb)) |
219 | return -ENOMEM; | |
220 | ||
221 | skb_reserve(skb, headroom); | |
222 | skb_put(skb, sz); | |
223 | ||
224 | pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); | |
225 | if (unlikely(dma_mapping_error(dev, pa))) { | |
226 | kfree_skb(skb); | |
227 | return -ENOMEM; | |
228 | } | |
229 | ||
230 | d->dma.d0 = BIT(9) | RX_DMA_D0_CMD_DMA_IT; | |
68ada71e | 231 | wil_desc_addr_set(&d->dma.addr, pa); |
2be7d22f VK |
232 | /* ip_length don't care */ |
233 | /* b11 don't care */ | |
234 | /* error don't care */ | |
235 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ | |
7e594444 | 236 | d->dma.length = cpu_to_le16(sz); |
68ada71e | 237 | *_d = *d; |
f88f113a | 238 | vring->ctx[i].skb = skb; |
2be7d22f VK |
239 | |
240 | return 0; | |
241 | } | |
242 | ||
243 | /** | |
244 | * Adds radiotap header | |
245 | * | |
246 | * Any error indicated as "Bad FCS" | |
247 | * | |
248 | * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: | |
249 | * - Rx descriptor: 32 bytes | |
250 | * - Phy info | |
251 | */ | |
252 | static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, | |
33e61169 | 253 | struct sk_buff *skb) |
2be7d22f VK |
254 | { |
255 | struct wireless_dev *wdev = wil->wdev; | |
256 | struct wil6210_rtap { | |
257 | struct ieee80211_radiotap_header rthdr; | |
258 | /* fields should be in the order of bits in rthdr.it_present */ | |
259 | /* flags */ | |
260 | u8 flags; | |
261 | /* channel */ | |
262 | __le16 chnl_freq __aligned(2); | |
263 | __le16 chnl_flags; | |
264 | /* MCS */ | |
265 | u8 mcs_present; | |
266 | u8 mcs_flags; | |
267 | u8 mcs_index; | |
268 | } __packed; | |
269 | struct wil6210_rtap_vendor { | |
270 | struct wil6210_rtap rtap; | |
271 | /* vendor */ | |
272 | u8 vendor_oui[3] __aligned(2); | |
273 | u8 vendor_ns; | |
274 | __le16 vendor_skip; | |
275 | u8 vendor_data[0]; | |
276 | } __packed; | |
33e61169 | 277 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
2be7d22f VK |
278 | struct wil6210_rtap_vendor *rtap_vendor; |
279 | int rtap_len = sizeof(struct wil6210_rtap); | |
280 | int phy_length = 0; /* phy info header size, bytes */ | |
281 | static char phy_data[128]; | |
282 | struct ieee80211_channel *ch = wdev->preset_chandef.chan; | |
283 | ||
284 | if (rtap_include_phy_info) { | |
285 | rtap_len = sizeof(*rtap_vendor) + sizeof(*d); | |
286 | /* calculate additional length */ | |
287 | if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { | |
288 | /** | |
289 | * PHY info starts from 8-byte boundary | |
290 | * there are 8-byte lines, last line may be partially | |
291 | * written (HW bug), thus FW configures for last line | |
292 | * to be excessive. Driver skips this last line. | |
293 | */ | |
294 | int len = min_t(int, 8 + sizeof(phy_data), | |
295 | wil_rxdesc_phy_length(d)); | |
8fe59627 | 296 | |
2be7d22f VK |
297 | if (len > 8) { |
298 | void *p = skb_tail_pointer(skb); | |
299 | void *pa = PTR_ALIGN(p, 8); | |
8fe59627 | 300 | |
2be7d22f VK |
301 | if (skb_tailroom(skb) >= len + (pa - p)) { |
302 | phy_length = len - 8; | |
303 | memcpy(phy_data, pa, phy_length); | |
304 | } | |
305 | } | |
306 | } | |
307 | rtap_len += phy_length; | |
308 | } | |
309 | ||
310 | if (skb_headroom(skb) < rtap_len && | |
311 | pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { | |
312 | wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); | |
313 | return; | |
314 | } | |
315 | ||
316 | rtap_vendor = (void *)skb_push(skb, rtap_len); | |
317 | memset(rtap_vendor, 0, rtap_len); | |
318 | ||
319 | rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; | |
320 | rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); | |
321 | rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( | |
322 | (1 << IEEE80211_RADIOTAP_FLAGS) | | |
323 | (1 << IEEE80211_RADIOTAP_CHANNEL) | | |
324 | (1 << IEEE80211_RADIOTAP_MCS)); | |
325 | if (d->dma.status & RX_DMA_STATUS_ERROR) | |
326 | rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; | |
327 | ||
328 | rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); | |
329 | rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); | |
330 | ||
331 | rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; | |
332 | rtap_vendor->rtap.mcs_flags = 0; | |
333 | rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); | |
334 | ||
335 | if (rtap_include_phy_info) { | |
336 | rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << | |
337 | IEEE80211_RADIOTAP_VENDOR_NAMESPACE); | |
338 | /* OUI for Wilocity 04:ce:14 */ | |
339 | rtap_vendor->vendor_oui[0] = 0x04; | |
340 | rtap_vendor->vendor_oui[1] = 0xce; | |
341 | rtap_vendor->vendor_oui[2] = 0x14; | |
342 | rtap_vendor->vendor_ns = 1; | |
343 | /* Rx descriptor + PHY data */ | |
344 | rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + | |
345 | phy_length); | |
346 | memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); | |
347 | memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, | |
348 | phy_length); | |
349 | } | |
350 | } | |
351 | ||
2be7d22f VK |
352 | /** |
353 | * reap 1 frame from @swhead | |
354 | * | |
33e61169 VK |
355 | * Rx descriptor copied to skb->cb |
356 | * | |
2be7d22f VK |
357 | * Safe to call from IRQ |
358 | */ | |
359 | static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, | |
360 | struct vring *vring) | |
361 | { | |
362 | struct device *dev = wil_to_dev(wil); | |
363 | struct net_device *ndev = wil_to_ndev(wil); | |
68ada71e VK |
364 | volatile struct vring_rx_desc *_d; |
365 | struct vring_rx_desc *d; | |
2be7d22f VK |
366 | struct sk_buff *skb; |
367 | dma_addr_t pa; | |
9a06bec9 | 368 | unsigned int sz = mtu_max + ETH_HLEN; |
7e594444 | 369 | u16 dmalen; |
2be7d22f | 370 | u8 ftype; |
c8b78b5f VK |
371 | int cid; |
372 | struct wil_net_stats *stats; | |
373 | ||
33e61169 VK |
374 | BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); |
375 | ||
33c477fd | 376 | if (unlikely(wil_vring_is_empty(vring))) |
2be7d22f VK |
377 | return NULL; |
378 | ||
8fe59627 | 379 | _d = &vring->va[vring->swhead].rx; |
33c477fd | 380 | if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { |
2be7d22f VK |
381 | /* it is not error, we just reached end of Rx done area */ |
382 | return NULL; | |
383 | } | |
384 | ||
f88f113a | 385 | skb = vring->ctx[vring->swhead].skb; |
68ada71e VK |
386 | d = wil_skb_rxdesc(skb); |
387 | *d = *_d; | |
388 | pa = wil_desc_addr(&d->dma.addr); | |
f88f113a | 389 | vring->ctx[vring->swhead].skb = NULL; |
68ada71e VK |
390 | wil_vring_advance_head(vring, 1); |
391 | ||
2be7d22f | 392 | dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); |
68ada71e VK |
393 | dmalen = le16_to_cpu(d->dma.length); |
394 | ||
395 | trace_wil6210_rx(vring->swhead, d); | |
396 | wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, dmalen); | |
397 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4, | |
398 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 399 | |
33c477fd | 400 | if (unlikely(dmalen > sz)) { |
e270045b | 401 | wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); |
110dea00 | 402 | kfree_skb(skb); |
e270045b VK |
403 | return NULL; |
404 | } | |
7e594444 | 405 | skb_trim(skb, dmalen); |
33e61169 | 406 | |
1cbbcb08 VK |
407 | prefetch(skb->data); |
408 | ||
c0d37713 VK |
409 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, |
410 | skb->data, skb_headlen(skb), false); | |
411 | ||
c8b78b5f VK |
412 | cid = wil_rxdesc_cid(d); |
413 | stats = &wil->sta[cid].stats; | |
414 | stats->last_mcs_rx = wil_rxdesc_mcs(d); | |
2be7d22f VK |
415 | |
416 | /* use radiotap header only if required */ | |
417 | if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) | |
33e61169 | 418 | wil_rx_add_radiotap_header(wil, skb); |
2be7d22f | 419 | |
2be7d22f VK |
420 | /* no extra checks if in sniffer mode */ |
421 | if (ndev->type != ARPHRD_ETHER) | |
422 | return skb; | |
423 | /* | |
424 | * Non-data frames may be delivered through Rx DMA channel (ex: BAR) | |
425 | * Driver should recognize it by frame type, that is found | |
426 | * in Rx descriptor. If type is not data, it is 802.11 frame as is | |
427 | */ | |
68ada71e | 428 | ftype = wil_rxdesc_ftype(d) << 2; |
33c477fd | 429 | if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { |
7743882d | 430 | wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype); |
2be7d22f VK |
431 | /* TODO: process it */ |
432 | kfree_skb(skb); | |
433 | return NULL; | |
434 | } | |
435 | ||
33c477fd | 436 | if (unlikely(skb->len < ETH_HLEN)) { |
2be7d22f VK |
437 | wil_err(wil, "Short frame, len = %d\n", skb->len); |
438 | /* TODO: process it (i.e. BAR) */ | |
439 | kfree_skb(skb); | |
440 | return NULL; | |
441 | } | |
442 | ||
504937d4 KE |
443 | /* L4 IDENT is on when HW calculated checksum, check status |
444 | * and in case of error drop the packet | |
445 | * higher stack layers will handle retransmission (if required) | |
446 | */ | |
33c477fd | 447 | if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { |
504937d4 | 448 | /* L4 protocol identified, csum calculated */ |
33c477fd | 449 | if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) |
504937d4 | 450 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
4a68ab10 VK |
451 | /* If HW reports bad checksum, let IP stack re-check it |
452 | * For example, HW don't understand Microsoft IP stack that | |
453 | * mis-calculates TCP checksum - if it should be 0x0, | |
454 | * it writes 0xffff in violation of RFC 1624 | |
455 | */ | |
504937d4 KE |
456 | } |
457 | ||
2be7d22f VK |
458 | return skb; |
459 | } | |
460 | ||
461 | /** | |
462 | * allocate and fill up to @count buffers in rx ring | |
463 | * buffers posted at @swtail | |
464 | */ | |
465 | static int wil_rx_refill(struct wil6210_priv *wil, int count) | |
466 | { | |
467 | struct net_device *ndev = wil_to_ndev(wil); | |
468 | struct vring *v = &wil->vring_rx; | |
469 | u32 next_tail; | |
470 | int rc = 0; | |
471 | int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? | |
472 | WIL6210_RTAP_SIZE : 0; | |
473 | ||
474 | for (; next_tail = wil_vring_next_tail(v), | |
475 | (next_tail != v->swhead) && (count-- > 0); | |
476 | v->swtail = next_tail) { | |
477 | rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); | |
33c477fd | 478 | if (unlikely(rc)) { |
2be7d22f VK |
479 | wil_err(wil, "Error %d in wil_rx_refill[%d]\n", |
480 | rc, v->swtail); | |
481 | break; | |
482 | } | |
483 | } | |
484 | iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail)); | |
485 | ||
486 | return rc; | |
487 | } | |
488 | ||
489 | /* | |
490 | * Pass Rx packet to the netif. Update statistics. | |
e0287c4a | 491 | * Called in softirq context (NAPI poll). |
2be7d22f | 492 | */ |
b4490f42 | 493 | void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) |
2be7d22f | 494 | { |
c42da999 | 495 | gro_result_t rc = GRO_NORMAL; |
c8b78b5f | 496 | struct wil6210_priv *wil = ndev_to_wil(ndev); |
c42da999 | 497 | struct wireless_dev *wdev = wil_to_wdev(wil); |
2be7d22f | 498 | unsigned int len = skb->len; |
c8b78b5f VK |
499 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
500 | int cid = wil_rxdesc_cid(d); | |
c42da999 VK |
501 | struct ethhdr *eth = (void *)skb->data; |
502 | /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication | |
503 | * is not suitable, need to look at data | |
504 | */ | |
505 | int mcast = is_multicast_ether_addr(eth->h_dest); | |
c8b78b5f | 506 | struct wil_net_stats *stats = &wil->sta[cid].stats; |
c42da999 VK |
507 | struct sk_buff *xmit_skb = NULL; |
508 | static const char * const gro_res_str[] = { | |
509 | [GRO_MERGED] = "GRO_MERGED", | |
510 | [GRO_MERGED_FREE] = "GRO_MERGED_FREE", | |
511 | [GRO_HELD] = "GRO_HELD", | |
512 | [GRO_NORMAL] = "GRO_NORMAL", | |
513 | [GRO_DROP] = "GRO_DROP", | |
514 | }; | |
2be7d22f | 515 | |
241804cb VK |
516 | skb_orphan(skb); |
517 | ||
c42da999 VK |
518 | if (wdev->iftype == NL80211_IFTYPE_AP) { |
519 | if (mcast) { | |
520 | /* send multicast frames both to higher layers in | |
521 | * local net stack and back to the wireless medium | |
522 | */ | |
523 | xmit_skb = skb_copy(skb, GFP_ATOMIC); | |
524 | } else { | |
525 | int xmit_cid = wil_find_cid(wil, eth->h_dest); | |
526 | ||
527 | if (xmit_cid >= 0) { | |
528 | /* The destination station is associated to | |
529 | * this AP (in this VLAN), so send the frame | |
530 | * directly to it and do not pass it to local | |
531 | * net stack. | |
532 | */ | |
533 | xmit_skb = skb; | |
534 | skb = NULL; | |
535 | } | |
536 | } | |
537 | } | |
538 | if (xmit_skb) { | |
539 | /* Send to wireless media and increase priority by 256 to | |
540 | * keep the received priority instead of reclassifying | |
541 | * the frame (see cfg80211_classify8021d). | |
542 | */ | |
543 | xmit_skb->dev = ndev; | |
544 | xmit_skb->priority += 256; | |
545 | xmit_skb->protocol = htons(ETH_P_802_3); | |
546 | skb_reset_network_header(xmit_skb); | |
547 | skb_reset_mac_header(xmit_skb); | |
548 | wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); | |
549 | dev_queue_xmit(xmit_skb); | |
550 | } | |
2be7d22f | 551 | |
c42da999 VK |
552 | if (skb) { /* deliver to local stack */ |
553 | ||
554 | skb->protocol = eth_type_trans(skb, ndev); | |
555 | rc = napi_gro_receive(&wil->napi_rx, skb); | |
556 | wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", | |
557 | len, gro_res_str[rc]); | |
558 | } | |
559 | /* statistics. rc set to GRO_NORMAL for AP bridging */ | |
b5998e6a VK |
560 | if (unlikely(rc == GRO_DROP)) { |
561 | ndev->stats.rx_dropped++; | |
562 | stats->rx_dropped++; | |
563 | wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); | |
564 | } else { | |
2be7d22f | 565 | ndev->stats.rx_packets++; |
c8b78b5f | 566 | stats->rx_packets++; |
2be7d22f | 567 | ndev->stats.rx_bytes += len; |
c8b78b5f | 568 | stats->rx_bytes += len; |
c42da999 VK |
569 | if (mcast) |
570 | ndev->stats.multicast++; | |
194b482b | 571 | } |
2be7d22f VK |
572 | } |
573 | ||
574 | /** | |
575 | * Proceed all completed skb's from Rx VRING | |
576 | * | |
e0287c4a | 577 | * Safe to call from NAPI poll, i.e. softirq with interrupts enabled |
2be7d22f | 578 | */ |
e0287c4a | 579 | void wil_rx_handle(struct wil6210_priv *wil, int *quota) |
2be7d22f VK |
580 | { |
581 | struct net_device *ndev = wil_to_ndev(wil); | |
582 | struct vring *v = &wil->vring_rx; | |
583 | struct sk_buff *skb; | |
584 | ||
33c477fd | 585 | if (unlikely(!v->va)) { |
2be7d22f VK |
586 | wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); |
587 | return; | |
588 | } | |
7743882d | 589 | wil_dbg_txrx(wil, "%s()\n", __func__); |
e0287c4a VK |
590 | while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { |
591 | (*quota)--; | |
2be7d22f | 592 | |
2be7d22f VK |
593 | if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
594 | skb->dev = ndev; | |
595 | skb_reset_mac_header(skb); | |
596 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
597 | skb->pkt_type = PACKET_OTHERHOST; | |
598 | skb->protocol = htons(ETH_P_802_2); | |
b4490f42 | 599 | wil_netif_rx_any(skb, ndev); |
2be7d22f | 600 | } else { |
e4373d8e | 601 | wil_rx_reorder(wil, skb); |
2be7d22f | 602 | } |
2be7d22f VK |
603 | } |
604 | wil_rx_refill(wil, v->size); | |
605 | } | |
606 | ||
d3762b40 | 607 | int wil_rx_init(struct wil6210_priv *wil, u16 size) |
2be7d22f | 608 | { |
2be7d22f VK |
609 | struct vring *vring = &wil->vring_rx; |
610 | int rc; | |
2be7d22f | 611 | |
9cf10d62 VK |
612 | wil_dbg_misc(wil, "%s()\n", __func__); |
613 | ||
8bf6adb9 VK |
614 | if (vring->va) { |
615 | wil_err(wil, "Rx ring already allocated\n"); | |
616 | return -EINVAL; | |
617 | } | |
618 | ||
d3762b40 | 619 | vring->size = size; |
2be7d22f VK |
620 | rc = wil_vring_alloc(wil, vring); |
621 | if (rc) | |
622 | return rc; | |
623 | ||
47e19af9 | 624 | rc = wmi_rx_chain_add(wil, vring); |
2be7d22f VK |
625 | if (rc) |
626 | goto err_free; | |
627 | ||
2be7d22f VK |
628 | rc = wil_rx_refill(wil, vring->size); |
629 | if (rc) | |
630 | goto err_free; | |
631 | ||
632 | return 0; | |
633 | err_free: | |
634 | wil_vring_free(wil, vring, 0); | |
635 | ||
636 | return rc; | |
637 | } | |
638 | ||
639 | void wil_rx_fini(struct wil6210_priv *wil) | |
640 | { | |
641 | struct vring *vring = &wil->vring_rx; | |
642 | ||
9cf10d62 VK |
643 | wil_dbg_misc(wil, "%s()\n", __func__); |
644 | ||
2acb4220 | 645 | if (vring->va) |
2be7d22f | 646 | wil_vring_free(wil, vring, 0); |
2be7d22f VK |
647 | } |
648 | ||
649 | int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, | |
650 | int cid, int tid) | |
651 | { | |
652 | int rc; | |
653 | struct wmi_vring_cfg_cmd cmd = { | |
654 | .action = cpu_to_le32(WMI_VRING_CMD_ADD), | |
655 | .vring_cfg = { | |
656 | .tx_sw_ring = { | |
9a06bec9 | 657 | .max_mpdu_size = |
c44690a1 | 658 | cpu_to_le16(wil_mtu2macbuf(mtu_max)), |
b5d98e9d | 659 | .ring_size = cpu_to_le16(size), |
2be7d22f VK |
660 | }, |
661 | .ringid = id, | |
a70abea5 | 662 | .cidxtid = mk_cidxtid(cid, tid), |
2be7d22f VK |
663 | .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, |
664 | .mac_ctrl = 0, | |
665 | .to_resolution = 0, | |
3277213f | 666 | .agg_max_wsize = 0, |
2be7d22f VK |
667 | .schd_params = { |
668 | .priority = cpu_to_le16(0), | |
669 | .timeslot_us = cpu_to_le16(0xfff), | |
670 | }, | |
671 | }, | |
672 | }; | |
673 | struct { | |
674 | struct wil6210_mbox_hdr_wmi wmi; | |
675 | struct wmi_vring_cfg_done_event cmd; | |
676 | } __packed reply; | |
677 | struct vring *vring = &wil->vring_tx[id]; | |
097638a0 | 678 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
2be7d22f | 679 | |
e0106ada VK |
680 | wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, |
681 | cmd.vring_cfg.tx_sw_ring.max_mpdu_size); | |
9cf10d62 | 682 | |
2be7d22f VK |
683 | if (vring->va) { |
684 | wil_err(wil, "Tx ring [%d] already allocated\n", id); | |
685 | rc = -EINVAL; | |
686 | goto out; | |
687 | } | |
688 | ||
097638a0 | 689 | memset(txdata, 0, sizeof(*txdata)); |
5933a06d | 690 | spin_lock_init(&txdata->lock); |
2be7d22f VK |
691 | vring->size = size; |
692 | rc = wil_vring_alloc(wil, vring); | |
693 | if (rc) | |
694 | goto out; | |
695 | ||
93ae6d49 VK |
696 | wil->vring2cid_tid[id][0] = cid; |
697 | wil->vring2cid_tid[id][1] = tid; | |
698 | ||
2be7d22f | 699 | cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); |
2be7d22f VK |
700 | |
701 | rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), | |
702 | WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); | |
703 | if (rc) | |
704 | goto out_free; | |
705 | ||
b8023177 | 706 | if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { |
2be7d22f VK |
707 | wil_err(wil, "Tx config failed, status 0x%02x\n", |
708 | reply.cmd.status); | |
c331997b | 709 | rc = -EINVAL; |
2be7d22f VK |
710 | goto out_free; |
711 | } | |
712 | vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); | |
713 | ||
097638a0 | 714 | txdata->enabled = 1; |
3a3def8d VK |
715 | if (wil->sta[cid].data_port_open && (agg_wsize >= 0)) |
716 | wil_addba_tx_request(wil, id, agg_wsize); | |
097638a0 | 717 | |
2be7d22f VK |
718 | return 0; |
719 | out_free: | |
720 | wil_vring_free(wil, vring, 1); | |
721 | out: | |
722 | ||
723 | return rc; | |
724 | } | |
725 | ||
726 | void wil_vring_fini_tx(struct wil6210_priv *wil, int id) | |
727 | { | |
728 | struct vring *vring = &wil->vring_tx[id]; | |
3a124ed6 | 729 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
2be7d22f | 730 | |
097638a0 VK |
731 | WARN_ON(!mutex_is_locked(&wil->mutex)); |
732 | ||
2be7d22f VK |
733 | if (!vring->va) |
734 | return; | |
735 | ||
9cf10d62 VK |
736 | wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); |
737 | ||
5933a06d VK |
738 | spin_lock_bh(&txdata->lock); |
739 | txdata->enabled = 0; /* no Tx can be in progress or start anew */ | |
740 | spin_unlock_bh(&txdata->lock); | |
097638a0 | 741 | /* make sure NAPI won't touch this vring */ |
9419b6a2 | 742 | if (test_bit(wil_status_napi_en, wil->status)) |
097638a0 VK |
743 | napi_synchronize(&wil->napi_tx); |
744 | ||
2be7d22f | 745 | wil_vring_free(wil, vring, 1); |
3a124ed6 | 746 | memset(txdata, 0, sizeof(*txdata)); |
2be7d22f VK |
747 | } |
748 | ||
749 | static struct vring *wil_find_tx_vring(struct wil6210_priv *wil, | |
750 | struct sk_buff *skb) | |
751 | { | |
3df2cd36 VK |
752 | int i; |
753 | struct ethhdr *eth = (void *)skb->data; | |
754 | int cid = wil_find_cid(wil, eth->h_dest); | |
755 | ||
756 | if (cid < 0) | |
757 | return NULL; | |
2be7d22f | 758 | |
e58c9f70 VK |
759 | if (!wil->sta[cid].data_port_open && |
760 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) | |
761 | return NULL; | |
762 | ||
3df2cd36 VK |
763 | /* TODO: fix for multiple TID */ |
764 | for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { | |
765 | if (wil->vring2cid_tid[i][0] == cid) { | |
766 | struct vring *v = &wil->vring_tx[i]; | |
8fe59627 | 767 | |
3df2cd36 VK |
768 | wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", |
769 | __func__, eth->h_dest, i); | |
770 | if (v->va) { | |
771 | return v; | |
772 | } else { | |
773 | wil_dbg_txrx(wil, "vring[%d] not valid\n", i); | |
774 | return NULL; | |
775 | } | |
776 | } | |
777 | } | |
2be7d22f VK |
778 | |
779 | return NULL; | |
780 | } | |
781 | ||
fb3cac57 VK |
782 | static void wil_set_da_for_vring(struct wil6210_priv *wil, |
783 | struct sk_buff *skb, int vring_index) | |
784 | { | |
785 | struct ethhdr *eth = (void *)skb->data; | |
786 | int cid = wil->vring2cid_tid[vring_index][0]; | |
8fe59627 | 787 | |
fb3cac57 VK |
788 | memcpy(eth->h_dest, wil->sta[cid].addr, ETH_ALEN); |
789 | } | |
790 | ||
791 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, | |
792 | struct sk_buff *skb); | |
54ed90a8 VK |
793 | |
794 | static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, | |
795 | struct sk_buff *skb) | |
796 | { | |
797 | struct vring *v; | |
798 | int i; | |
799 | u8 cid; | |
800 | ||
801 | /* In the STA mode, it is expected to have only 1 VRING | |
802 | * for the AP we connected to. | |
803 | * find 1-st vring and see whether it is eligible for data | |
804 | */ | |
805 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { | |
806 | v = &wil->vring_tx[i]; | |
807 | if (!v->va) | |
808 | continue; | |
809 | ||
810 | cid = wil->vring2cid_tid[i][0]; | |
811 | if (!wil->sta[cid].data_port_open && | |
812 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) | |
813 | break; | |
814 | ||
815 | wil_dbg_txrx(wil, "Tx -> ring %d\n", i); | |
816 | ||
817 | return v; | |
818 | } | |
819 | ||
820 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); | |
821 | ||
822 | return NULL; | |
823 | } | |
824 | ||
fb3cac57 VK |
825 | /* |
826 | * Find 1-st vring and return it; set dest address for this vring in skb | |
827 | * duplicate skb and send it to other active vrings | |
828 | */ | |
829 | static struct vring *wil_tx_bcast(struct wil6210_priv *wil, | |
8fe59627 | 830 | struct sk_buff *skb) |
fb3cac57 VK |
831 | { |
832 | struct vring *v, *v2; | |
833 | struct sk_buff *skb2; | |
834 | int i; | |
e58c9f70 | 835 | u8 cid; |
fb3cac57 | 836 | |
e58c9f70 | 837 | /* find 1-st vring eligible for data */ |
fb3cac57 VK |
838 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { |
839 | v = &wil->vring_tx[i]; | |
e58c9f70 VK |
840 | if (!v->va) |
841 | continue; | |
842 | ||
843 | cid = wil->vring2cid_tid[i][0]; | |
844 | if (!wil->sta[cid].data_port_open) | |
845 | continue; | |
846 | ||
847 | goto found; | |
fb3cac57 VK |
848 | } |
849 | ||
5aed1393 | 850 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); |
fb3cac57 VK |
851 | |
852 | return NULL; | |
853 | ||
854 | found: | |
855 | wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); | |
856 | wil_set_da_for_vring(wil, skb, i); | |
857 | ||
858 | /* find other active vrings and duplicate skb for each */ | |
859 | for (i++; i < WIL6210_MAX_TX_RINGS; i++) { | |
860 | v2 = &wil->vring_tx[i]; | |
861 | if (!v2->va) | |
862 | continue; | |
e58c9f70 VK |
863 | cid = wil->vring2cid_tid[i][0]; |
864 | if (!wil->sta[cid].data_port_open) | |
865 | continue; | |
866 | ||
fb3cac57 VK |
867 | skb2 = skb_copy(skb, GFP_ATOMIC); |
868 | if (skb2) { | |
869 | wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); | |
870 | wil_set_da_for_vring(wil, skb2, i); | |
871 | wil_tx_vring(wil, v2, skb2); | |
872 | } else { | |
873 | wil_err(wil, "skb_copy failed\n"); | |
874 | } | |
875 | } | |
876 | ||
877 | return v; | |
878 | } | |
879 | ||
99b55bd2 KE |
880 | static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, |
881 | int vring_index) | |
2be7d22f | 882 | { |
68ada71e | 883 | wil_desc_addr_set(&d->dma.addr, pa); |
2be7d22f VK |
884 | d->dma.ip_length = 0; |
885 | /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ | |
886 | d->dma.b11 = 0/*14 | BIT(7)*/; | |
887 | d->dma.error = 0; | |
888 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ | |
7e594444 | 889 | d->dma.length = cpu_to_le16((u16)len); |
99b55bd2 | 890 | d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); |
2be7d22f VK |
891 | d->mac.d[0] = 0; |
892 | d->mac.d[1] = 0; | |
893 | d->mac.d[2] = 0; | |
894 | d->mac.ucode_cmd = 0; | |
2be7d22f VK |
895 | /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ |
896 | d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | | |
897 | (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); | |
898 | ||
899 | return 0; | |
900 | } | |
901 | ||
c236658f VK |
902 | static inline |
903 | void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) | |
904 | { | |
905 | d->mac.d[2] |= ((nr_frags + 1) << | |
906 | MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); | |
907 | } | |
908 | ||
504937d4 | 909 | static int wil_tx_desc_offload_cksum_set(struct wil6210_priv *wil, |
8fe59627 VK |
910 | struct vring_tx_desc *d, |
911 | struct sk_buff *skb) | |
504937d4 KE |
912 | { |
913 | int protocol; | |
914 | ||
915 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
916 | return 0; | |
917 | ||
df2d08ee VK |
918 | d->dma.b11 = ETH_HLEN; /* MAC header length */ |
919 | ||
504937d4 KE |
920 | switch (skb->protocol) { |
921 | case cpu_to_be16(ETH_P_IP): | |
922 | protocol = ip_hdr(skb)->protocol; | |
df2d08ee | 923 | d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); |
504937d4 KE |
924 | break; |
925 | case cpu_to_be16(ETH_P_IPV6): | |
926 | protocol = ipv6_hdr(skb)->nexthdr; | |
927 | break; | |
928 | default: | |
929 | return -EINVAL; | |
930 | } | |
931 | ||
932 | switch (protocol) { | |
933 | case IPPROTO_TCP: | |
934 | d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); | |
935 | /* L4 header len: TCP header length */ | |
936 | d->dma.d0 |= | |
937 | (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); | |
938 | break; | |
939 | case IPPROTO_UDP: | |
940 | /* L4 header len: UDP header length */ | |
941 | d->dma.d0 |= | |
942 | (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); | |
943 | break; | |
944 | default: | |
945 | return -EINVAL; | |
946 | } | |
947 | ||
948 | d->dma.ip_length = skb_network_header_len(skb); | |
504937d4 KE |
949 | /* Enable TCP/UDP checksum */ |
950 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); | |
951 | /* Calculate pseudo-header */ | |
952 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); | |
953 | ||
954 | return 0; | |
955 | } | |
956 | ||
5933a06d VK |
957 | static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
958 | struct sk_buff *skb) | |
2be7d22f VK |
959 | { |
960 | struct device *dev = wil_to_dev(wil); | |
68ada71e VK |
961 | struct vring_tx_desc dd, *d = ⅆ |
962 | volatile struct vring_tx_desc *_d; | |
2be7d22f VK |
963 | u32 swhead = vring->swhead; |
964 | int avail = wil_vring_avail_tx(vring); | |
965 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
504937d4 | 966 | uint f = 0; |
2be7d22f | 967 | int vring_index = vring - wil->vring_tx; |
7c0acf86 | 968 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; |
2be7d22f VK |
969 | uint i = swhead; |
970 | dma_addr_t pa; | |
0436fd9a | 971 | int used; |
2be7d22f | 972 | |
7743882d | 973 | wil_dbg_txrx(wil, "%s()\n", __func__); |
2be7d22f | 974 | |
5933a06d VK |
975 | if (unlikely(!txdata->enabled)) |
976 | return -EINVAL; | |
977 | ||
33c477fd | 978 | if (unlikely(avail < 1 + nr_frags)) { |
70801e1b | 979 | wil_err_ratelimited(wil, |
5b29c573 VK |
980 | "Tx ring[%2d] full. No space for %d fragments\n", |
981 | vring_index, 1 + nr_frags); | |
2be7d22f VK |
982 | return -ENOMEM; |
983 | } | |
8fe59627 | 984 | _d = &vring->va[i].tx; |
2be7d22f | 985 | |
8fe59627 | 986 | pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); |
2be7d22f | 987 | |
5b29c573 VK |
988 | wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, |
989 | skb_headlen(skb), skb->data, &pa); | |
7743882d | 990 | wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, |
2be7d22f VK |
991 | skb->data, skb_headlen(skb), false); |
992 | ||
993 | if (unlikely(dma_mapping_error(dev, pa))) | |
994 | return -EINVAL; | |
2232abd5 | 995 | vring->ctx[i].mapped_as = wil_mapped_as_single; |
2be7d22f | 996 | /* 1-st segment */ |
99b55bd2 | 997 | wil_tx_desc_map(d, pa, skb_headlen(skb), vring_index); |
504937d4 | 998 | /* Process TCP/UDP checksum offloading */ |
33c477fd | 999 | if (unlikely(wil_tx_desc_offload_cksum_set(wil, d, skb))) { |
5b29c573 | 1000 | wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", |
504937d4 KE |
1001 | vring_index); |
1002 | goto dma_error; | |
1003 | } | |
1004 | ||
c236658f VK |
1005 | vring->ctx[i].nr_frags = nr_frags; |
1006 | wil_tx_desc_set_nr_frags(d, nr_frags); | |
68ada71e | 1007 | |
2be7d22f | 1008 | /* middle segments */ |
504937d4 | 1009 | for (; f < nr_frags; f++) { |
2be7d22f VK |
1010 | const struct skb_frag_struct *frag = |
1011 | &skb_shinfo(skb)->frags[f]; | |
1012 | int len = skb_frag_size(frag); | |
8fe59627 | 1013 | |
e59d16c0 | 1014 | *_d = *d; |
5b29c573 VK |
1015 | wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); |
1016 | wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, | |
1017 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 1018 | i = (swhead + f + 1) % vring->size; |
8fe59627 | 1019 | _d = &vring->va[i].tx; |
2be7d22f | 1020 | pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), |
8fe59627 | 1021 | DMA_TO_DEVICE); |
2be7d22f VK |
1022 | if (unlikely(dma_mapping_error(dev, pa))) |
1023 | goto dma_error; | |
2232abd5 | 1024 | vring->ctx[i].mapped_as = wil_mapped_as_page; |
99b55bd2 | 1025 | wil_tx_desc_map(d, pa, len, vring_index); |
c236658f VK |
1026 | /* no need to check return code - |
1027 | * if it succeeded for 1-st descriptor, | |
1028 | * it will succeed here too | |
1029 | */ | |
1030 | wil_tx_desc_offload_cksum_set(wil, d, skb); | |
2be7d22f VK |
1031 | } |
1032 | /* for the last seg only */ | |
1033 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); | |
668b2bbd | 1034 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); |
2be7d22f | 1035 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); |
68ada71e | 1036 | *_d = *d; |
5b29c573 VK |
1037 | wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); |
1038 | wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, | |
1039 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 1040 | |
6cdadd4d VK |
1041 | /* hold reference to skb |
1042 | * to prevent skb release before accounting | |
1043 | * in case of immediate "tx done" | |
1044 | */ | |
1045 | vring->ctx[i].skb = skb_get(skb); | |
1046 | ||
0436fd9a VS |
1047 | /* performance monitoring */ |
1048 | used = wil_vring_used_tx(vring); | |
1049 | if (wil_val_in_range(vring_idle_trsh, | |
1050 | used, used + nr_frags + 1)) { | |
7c0acf86 | 1051 | txdata->idle += get_cycles() - txdata->last_idle; |
0436fd9a VS |
1052 | wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", |
1053 | vring_index, used, used + nr_frags + 1); | |
1054 | } | |
7c0acf86 | 1055 | |
2be7d22f VK |
1056 | /* advance swhead */ |
1057 | wil_vring_advance_head(vring, nr_frags + 1); | |
5b29c573 VK |
1058 | wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, |
1059 | vring->swhead); | |
98658095 | 1060 | trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); |
2be7d22f | 1061 | iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail)); |
2be7d22f VK |
1062 | |
1063 | return 0; | |
1064 | dma_error: | |
1065 | /* unmap what we have mapped */ | |
c2a146f6 VK |
1066 | nr_frags = f + 1; /* frags mapped + one for skb head */ |
1067 | for (f = 0; f < nr_frags; f++) { | |
c2a146f6 | 1068 | struct wil_ctx *ctx; |
7e594444 | 1069 | |
2be7d22f | 1070 | i = (swhead + f) % vring->size; |
c2a146f6 | 1071 | ctx = &vring->ctx[i]; |
8fe59627 | 1072 | _d = &vring->va[i].tx; |
68ada71e VK |
1073 | *d = *_d; |
1074 | _d->dma.status = TX_DMA_STATUS_DU; | |
2232abd5 | 1075 | wil_txdesc_unmap(dev, d, ctx); |
f88f113a VK |
1076 | |
1077 | if (ctx->skb) | |
1078 | dev_kfree_skb_any(ctx->skb); | |
1079 | ||
1080 | memset(ctx, 0, sizeof(*ctx)); | |
2be7d22f VK |
1081 | } |
1082 | ||
1083 | return -EINVAL; | |
1084 | } | |
1085 | ||
5933a06d VK |
1086 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
1087 | struct sk_buff *skb) | |
1088 | { | |
1089 | int vring_index = vring - wil->vring_tx; | |
1090 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; | |
1091 | int rc; | |
1092 | ||
1093 | spin_lock(&txdata->lock); | |
1094 | rc = __wil_tx_vring(wil, vring, skb); | |
1095 | spin_unlock(&txdata->lock); | |
1096 | return rc; | |
1097 | } | |
1098 | ||
2be7d22f VK |
1099 | netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
1100 | { | |
1101 | struct wil6210_priv *wil = ndev_to_wil(ndev); | |
3df2cd36 | 1102 | struct ethhdr *eth = (void *)skb->data; |
2be7d22f | 1103 | struct vring *vring; |
aa27deaa | 1104 | static bool pr_once_fw; |
2be7d22f VK |
1105 | int rc; |
1106 | ||
7743882d | 1107 | wil_dbg_txrx(wil, "%s()\n", __func__); |
33c477fd | 1108 | if (unlikely(!test_bit(wil_status_fwready, wil->status))) { |
aa27deaa VK |
1109 | if (!pr_once_fw) { |
1110 | wil_err(wil, "FW not ready\n"); | |
1111 | pr_once_fw = true; | |
1112 | } | |
2be7d22f VK |
1113 | goto drop; |
1114 | } | |
33c477fd | 1115 | if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { |
2be7d22f VK |
1116 | wil_err(wil, "FW not connected\n"); |
1117 | goto drop; | |
1118 | } | |
33c477fd | 1119 | if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { |
2be7d22f VK |
1120 | wil_err(wil, "Xmit in monitor mode not supported\n"); |
1121 | goto drop; | |
1122 | } | |
aa27deaa | 1123 | pr_once_fw = false; |
d58db4e4 VK |
1124 | |
1125 | /* find vring */ | |
54ed90a8 VK |
1126 | if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { |
1127 | /* in STA mode (ESS), all to same VRING */ | |
1128 | vring = wil_find_tx_vring_sta(wil, skb); | |
1129 | } else { /* direct communication, find matching VRING */ | |
1130 | if (is_unicast_ether_addr(eth->h_dest)) | |
1131 | vring = wil_find_tx_vring(wil, skb); | |
1132 | else | |
1133 | vring = wil_tx_bcast(wil, skb); | |
1134 | } | |
33c477fd | 1135 | if (unlikely(!vring)) { |
5aed1393 | 1136 | wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); |
d58db4e4 | 1137 | goto drop; |
2be7d22f | 1138 | } |
d58db4e4 VK |
1139 | /* set up vring entry */ |
1140 | rc = wil_tx_vring(wil, vring, skb); | |
1141 | ||
2232abd5 | 1142 | /* do we still have enough room in the vring? */ |
33c477fd | 1143 | if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { |
2232abd5 | 1144 | netif_tx_stop_all_queues(wil_to_ndev(wil)); |
55f8f680 VK |
1145 | wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); |
1146 | } | |
2232abd5 | 1147 | |
2be7d22f VK |
1148 | switch (rc) { |
1149 | case 0: | |
795ce734 | 1150 | /* statistics will be updated on the tx_complete */ |
2be7d22f VK |
1151 | dev_kfree_skb_any(skb); |
1152 | return NETDEV_TX_OK; | |
1153 | case -ENOMEM: | |
1154 | return NETDEV_TX_BUSY; | |
1155 | default: | |
afda8bb5 | 1156 | break; /* goto drop; */ |
2be7d22f VK |
1157 | } |
1158 | drop: | |
2be7d22f VK |
1159 | ndev->stats.tx_dropped++; |
1160 | dev_kfree_skb_any(skb); | |
1161 | ||
1162 | return NET_XMIT_DROP; | |
1163 | } | |
1164 | ||
713c8a29 VK |
1165 | static inline bool wil_need_txstat(struct sk_buff *skb) |
1166 | { | |
1167 | struct ethhdr *eth = (void *)skb->data; | |
1168 | ||
1169 | return is_unicast_ether_addr(eth->h_dest) && skb->sk && | |
1170 | (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); | |
1171 | } | |
1172 | ||
1173 | static inline void wil_consume_skb(struct sk_buff *skb, bool acked) | |
1174 | { | |
1175 | if (unlikely(wil_need_txstat(skb))) | |
1176 | skb_complete_wifi_ack(skb, acked); | |
1177 | else | |
1178 | acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); | |
1179 | } | |
1180 | ||
2be7d22f VK |
1181 | /** |
1182 | * Clean up transmitted skb's from the Tx VRING | |
1183 | * | |
e0287c4a VK |
1184 | * Return number of descriptors cleared |
1185 | * | |
2be7d22f VK |
1186 | * Safe to call from IRQ |
1187 | */ | |
e0287c4a | 1188 | int wil_tx_complete(struct wil6210_priv *wil, int ringid) |
2be7d22f | 1189 | { |
795ce734 | 1190 | struct net_device *ndev = wil_to_ndev(wil); |
2be7d22f VK |
1191 | struct device *dev = wil_to_dev(wil); |
1192 | struct vring *vring = &wil->vring_tx[ringid]; | |
097638a0 | 1193 | struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; |
e0287c4a | 1194 | int done = 0; |
c8b78b5f VK |
1195 | int cid = wil->vring2cid_tid[ringid][0]; |
1196 | struct wil_net_stats *stats = &wil->sta[cid].stats; | |
c236658f | 1197 | volatile struct vring_tx_desc *_d; |
0436fd9a VS |
1198 | int used_before_complete; |
1199 | int used_new; | |
2be7d22f | 1200 | |
33c477fd | 1201 | if (unlikely(!vring->va)) { |
2be7d22f | 1202 | wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); |
e0287c4a | 1203 | return 0; |
2be7d22f VK |
1204 | } |
1205 | ||
33c477fd | 1206 | if (unlikely(!txdata->enabled)) { |
097638a0 VK |
1207 | wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); |
1208 | return 0; | |
1209 | } | |
1210 | ||
7743882d | 1211 | wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); |
2be7d22f | 1212 | |
0436fd9a VS |
1213 | used_before_complete = wil_vring_used_tx(vring); |
1214 | ||
2be7d22f | 1215 | while (!wil_vring_is_empty(vring)) { |
c236658f | 1216 | int new_swtail; |
f88f113a | 1217 | struct wil_ctx *ctx = &vring->ctx[vring->swtail]; |
c236658f VK |
1218 | /** |
1219 | * For the fragmented skb, HW will set DU bit only for the | |
1220 | * last fragment. look for it | |
1221 | */ | |
1222 | int lf = (vring->swtail + ctx->nr_frags) % vring->size; | |
1223 | /* TODO: check we are not past head */ | |
4de41bef | 1224 | |
c236658f | 1225 | _d = &vring->va[lf].tx; |
33c477fd | 1226 | if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) |
2be7d22f VK |
1227 | break; |
1228 | ||
c236658f VK |
1229 | new_swtail = (lf + 1) % vring->size; |
1230 | while (vring->swtail != new_swtail) { | |
1231 | struct vring_tx_desc dd, *d = ⅆ | |
c236658f | 1232 | u16 dmalen; |
76dfa4b7 VK |
1233 | struct sk_buff *skb; |
1234 | ||
1235 | ctx = &vring->ctx[vring->swtail]; | |
1236 | skb = ctx->skb; | |
c236658f | 1237 | _d = &vring->va[vring->swtail].tx; |
2be7d22f | 1238 | |
c236658f | 1239 | *d = *_d; |
f88f113a | 1240 | |
c236658f VK |
1241 | dmalen = le16_to_cpu(d->dma.length); |
1242 | trace_wil6210_tx_done(ringid, vring->swtail, dmalen, | |
1243 | d->dma.error); | |
1244 | wil_dbg_txrx(wil, | |
5b29c573 VK |
1245 | "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", |
1246 | ringid, vring->swtail, dmalen, | |
1247 | d->dma.status, d->dma.error); | |
1248 | wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, | |
c236658f | 1249 | (const void *)d, sizeof(*d), false); |
795ce734 | 1250 | |
2232abd5 | 1251 | wil_txdesc_unmap(dev, d, ctx); |
c236658f VK |
1252 | |
1253 | if (skb) { | |
33c477fd | 1254 | if (likely(d->dma.error == 0)) { |
c236658f VK |
1255 | ndev->stats.tx_packets++; |
1256 | stats->tx_packets++; | |
1257 | ndev->stats.tx_bytes += skb->len; | |
1258 | stats->tx_bytes += skb->len; | |
1259 | } else { | |
1260 | ndev->stats.tx_errors++; | |
1261 | stats->tx_errors++; | |
1262 | } | |
713c8a29 | 1263 | wil_consume_skb(skb, d->dma.error == 0); |
c236658f VK |
1264 | } |
1265 | memset(ctx, 0, sizeof(*ctx)); | |
1266 | /* There is no need to touch HW descriptor: | |
1267 | * - ststus bit TX_DMA_STATUS_DU is set by design, | |
1268 | * so hardware will not try to process this desc., | |
1269 | * - rest of descriptor will be initialized on Tx. | |
1270 | */ | |
1271 | vring->swtail = wil_vring_next_tail(vring); | |
1272 | done++; | |
2be7d22f | 1273 | } |
2be7d22f | 1274 | } |
67c3e1b4 | 1275 | |
0436fd9a VS |
1276 | /* performance monitoring */ |
1277 | used_new = wil_vring_used_tx(vring); | |
1278 | if (wil_val_in_range(vring_idle_trsh, | |
1279 | used_new, used_before_complete)) { | |
1280 | wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", | |
1281 | ringid, used_before_complete, used_new); | |
7c0acf86 VK |
1282 | txdata->last_idle = get_cycles(); |
1283 | } | |
67c3e1b4 | 1284 | |
55f8f680 VK |
1285 | if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { |
1286 | wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); | |
2be7d22f | 1287 | netif_tx_wake_all_queues(wil_to_ndev(wil)); |
55f8f680 | 1288 | } |
e0287c4a VK |
1289 | |
1290 | return done; | |
2be7d22f | 1291 | } |