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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 | ||
2be7d22f VK |
349 | /** |
350 | * reap 1 frame from @swhead | |
351 | * | |
33e61169 VK |
352 | * Rx descriptor copied to skb->cb |
353 | * | |
2be7d22f VK |
354 | * Safe to call from IRQ |
355 | */ | |
356 | static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, | |
357 | struct vring *vring) | |
358 | { | |
359 | struct device *dev = wil_to_dev(wil); | |
360 | struct net_device *ndev = wil_to_ndev(wil); | |
68ada71e VK |
361 | volatile struct vring_rx_desc *_d; |
362 | struct vring_rx_desc *d; | |
2be7d22f VK |
363 | struct sk_buff *skb; |
364 | dma_addr_t pa; | |
9a06bec9 | 365 | unsigned int sz = mtu_max + ETH_HLEN; |
7e594444 | 366 | u16 dmalen; |
2be7d22f | 367 | u8 ftype; |
c8b78b5f VK |
368 | int cid; |
369 | struct wil_net_stats *stats; | |
370 | ||
33e61169 VK |
371 | BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); |
372 | ||
33c477fd | 373 | if (unlikely(wil_vring_is_empty(vring))) |
2be7d22f VK |
374 | return NULL; |
375 | ||
8fe59627 | 376 | _d = &vring->va[vring->swhead].rx; |
33c477fd | 377 | if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { |
2be7d22f VK |
378 | /* it is not error, we just reached end of Rx done area */ |
379 | return NULL; | |
380 | } | |
381 | ||
f88f113a | 382 | skb = vring->ctx[vring->swhead].skb; |
68ada71e VK |
383 | d = wil_skb_rxdesc(skb); |
384 | *d = *_d; | |
385 | pa = wil_desc_addr(&d->dma.addr); | |
f88f113a | 386 | vring->ctx[vring->swhead].skb = NULL; |
68ada71e VK |
387 | wil_vring_advance_head(vring, 1); |
388 | ||
2be7d22f | 389 | dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); |
68ada71e VK |
390 | dmalen = le16_to_cpu(d->dma.length); |
391 | ||
392 | trace_wil6210_rx(vring->swhead, d); | |
393 | wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", vring->swhead, dmalen); | |
394 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4, | |
395 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 396 | |
33c477fd | 397 | if (unlikely(dmalen > sz)) { |
e270045b | 398 | wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); |
110dea00 | 399 | kfree_skb(skb); |
e270045b VK |
400 | return NULL; |
401 | } | |
7e594444 | 402 | skb_trim(skb, dmalen); |
33e61169 | 403 | |
1cbbcb08 VK |
404 | prefetch(skb->data); |
405 | ||
c0d37713 VK |
406 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, |
407 | skb->data, skb_headlen(skb), false); | |
408 | ||
c8b78b5f VK |
409 | cid = wil_rxdesc_cid(d); |
410 | stats = &wil->sta[cid].stats; | |
411 | stats->last_mcs_rx = wil_rxdesc_mcs(d); | |
2be7d22f VK |
412 | |
413 | /* use radiotap header only if required */ | |
414 | if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) | |
33e61169 | 415 | wil_rx_add_radiotap_header(wil, skb); |
2be7d22f | 416 | |
2be7d22f VK |
417 | /* no extra checks if in sniffer mode */ |
418 | if (ndev->type != ARPHRD_ETHER) | |
419 | return skb; | |
420 | /* | |
421 | * Non-data frames may be delivered through Rx DMA channel (ex: BAR) | |
422 | * Driver should recognize it by frame type, that is found | |
423 | * in Rx descriptor. If type is not data, it is 802.11 frame as is | |
424 | */ | |
68ada71e | 425 | ftype = wil_rxdesc_ftype(d) << 2; |
33c477fd | 426 | if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { |
7743882d | 427 | wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype); |
2be7d22f VK |
428 | /* TODO: process it */ |
429 | kfree_skb(skb); | |
430 | return NULL; | |
431 | } | |
432 | ||
33c477fd | 433 | if (unlikely(skb->len < ETH_HLEN)) { |
2be7d22f VK |
434 | wil_err(wil, "Short frame, len = %d\n", skb->len); |
435 | /* TODO: process it (i.e. BAR) */ | |
436 | kfree_skb(skb); | |
437 | return NULL; | |
438 | } | |
439 | ||
504937d4 KE |
440 | /* L4 IDENT is on when HW calculated checksum, check status |
441 | * and in case of error drop the packet | |
442 | * higher stack layers will handle retransmission (if required) | |
443 | */ | |
33c477fd | 444 | if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { |
504937d4 | 445 | /* L4 protocol identified, csum calculated */ |
33c477fd | 446 | if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) |
504937d4 | 447 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
4a68ab10 VK |
448 | /* If HW reports bad checksum, let IP stack re-check it |
449 | * For example, HW don't understand Microsoft IP stack that | |
450 | * mis-calculates TCP checksum - if it should be 0x0, | |
451 | * it writes 0xffff in violation of RFC 1624 | |
452 | */ | |
504937d4 KE |
453 | } |
454 | ||
2be7d22f VK |
455 | return skb; |
456 | } | |
457 | ||
458 | /** | |
459 | * allocate and fill up to @count buffers in rx ring | |
460 | * buffers posted at @swtail | |
461 | */ | |
462 | static int wil_rx_refill(struct wil6210_priv *wil, int count) | |
463 | { | |
464 | struct net_device *ndev = wil_to_ndev(wil); | |
465 | struct vring *v = &wil->vring_rx; | |
466 | u32 next_tail; | |
467 | int rc = 0; | |
468 | int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? | |
469 | WIL6210_RTAP_SIZE : 0; | |
470 | ||
471 | for (; next_tail = wil_vring_next_tail(v), | |
472 | (next_tail != v->swhead) && (count-- > 0); | |
473 | v->swtail = next_tail) { | |
474 | rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); | |
33c477fd | 475 | if (unlikely(rc)) { |
2be7d22f VK |
476 | wil_err(wil, "Error %d in wil_rx_refill[%d]\n", |
477 | rc, v->swtail); | |
478 | break; | |
479 | } | |
480 | } | |
481 | iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail)); | |
482 | ||
483 | return rc; | |
484 | } | |
485 | ||
486 | /* | |
487 | * Pass Rx packet to the netif. Update statistics. | |
e0287c4a | 488 | * Called in softirq context (NAPI poll). |
2be7d22f | 489 | */ |
b4490f42 | 490 | void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) |
2be7d22f | 491 | { |
b5998e6a | 492 | gro_result_t rc; |
c8b78b5f | 493 | struct wil6210_priv *wil = ndev_to_wil(ndev); |
2be7d22f | 494 | unsigned int len = skb->len; |
c8b78b5f VK |
495 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
496 | int cid = wil_rxdesc_cid(d); | |
497 | struct wil_net_stats *stats = &wil->sta[cid].stats; | |
2be7d22f | 498 | |
241804cb VK |
499 | skb_orphan(skb); |
500 | ||
b5998e6a | 501 | rc = napi_gro_receive(&wil->napi_rx, skb); |
2be7d22f | 502 | |
b5998e6a VK |
503 | if (unlikely(rc == GRO_DROP)) { |
504 | ndev->stats.rx_dropped++; | |
505 | stats->rx_dropped++; | |
506 | wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); | |
507 | } else { | |
2be7d22f | 508 | ndev->stats.rx_packets++; |
c8b78b5f | 509 | stats->rx_packets++; |
2be7d22f | 510 | ndev->stats.rx_bytes += len; |
c8b78b5f | 511 | stats->rx_bytes += len; |
2be7d22f | 512 | } |
194b482b VK |
513 | { |
514 | static const char * const gro_res_str[] = { | |
515 | [GRO_MERGED] = "GRO_MERGED", | |
516 | [GRO_MERGED_FREE] = "GRO_MERGED_FREE", | |
517 | [GRO_HELD] = "GRO_HELD", | |
518 | [GRO_NORMAL] = "GRO_NORMAL", | |
519 | [GRO_DROP] = "GRO_DROP", | |
520 | }; | |
8fe59627 | 521 | wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", |
194b482b VK |
522 | len, gro_res_str[rc]); |
523 | } | |
2be7d22f VK |
524 | } |
525 | ||
526 | /** | |
527 | * Proceed all completed skb's from Rx VRING | |
528 | * | |
e0287c4a | 529 | * Safe to call from NAPI poll, i.e. softirq with interrupts enabled |
2be7d22f | 530 | */ |
e0287c4a | 531 | void wil_rx_handle(struct wil6210_priv *wil, int *quota) |
2be7d22f VK |
532 | { |
533 | struct net_device *ndev = wil_to_ndev(wil); | |
534 | struct vring *v = &wil->vring_rx; | |
535 | struct sk_buff *skb; | |
536 | ||
33c477fd | 537 | if (unlikely(!v->va)) { |
2be7d22f VK |
538 | wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); |
539 | return; | |
540 | } | |
7743882d | 541 | wil_dbg_txrx(wil, "%s()\n", __func__); |
e0287c4a VK |
542 | while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { |
543 | (*quota)--; | |
2be7d22f | 544 | |
2be7d22f VK |
545 | if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
546 | skb->dev = ndev; | |
547 | skb_reset_mac_header(skb); | |
548 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
549 | skb->pkt_type = PACKET_OTHERHOST; | |
550 | skb->protocol = htons(ETH_P_802_2); | |
b4490f42 | 551 | wil_netif_rx_any(skb, ndev); |
2be7d22f VK |
552 | } else { |
553 | skb->protocol = eth_type_trans(skb, ndev); | |
e4373d8e | 554 | wil_rx_reorder(wil, skb); |
2be7d22f | 555 | } |
2be7d22f VK |
556 | } |
557 | wil_rx_refill(wil, v->size); | |
558 | } | |
559 | ||
d3762b40 | 560 | int wil_rx_init(struct wil6210_priv *wil, u16 size) |
2be7d22f | 561 | { |
2be7d22f VK |
562 | struct vring *vring = &wil->vring_rx; |
563 | int rc; | |
2be7d22f | 564 | |
9cf10d62 VK |
565 | wil_dbg_misc(wil, "%s()\n", __func__); |
566 | ||
8bf6adb9 VK |
567 | if (vring->va) { |
568 | wil_err(wil, "Rx ring already allocated\n"); | |
569 | return -EINVAL; | |
570 | } | |
571 | ||
d3762b40 | 572 | vring->size = size; |
2be7d22f VK |
573 | rc = wil_vring_alloc(wil, vring); |
574 | if (rc) | |
575 | return rc; | |
576 | ||
47e19af9 | 577 | rc = wmi_rx_chain_add(wil, vring); |
2be7d22f VK |
578 | if (rc) |
579 | goto err_free; | |
580 | ||
2be7d22f VK |
581 | rc = wil_rx_refill(wil, vring->size); |
582 | if (rc) | |
583 | goto err_free; | |
584 | ||
585 | return 0; | |
586 | err_free: | |
587 | wil_vring_free(wil, vring, 0); | |
588 | ||
589 | return rc; | |
590 | } | |
591 | ||
592 | void wil_rx_fini(struct wil6210_priv *wil) | |
593 | { | |
594 | struct vring *vring = &wil->vring_rx; | |
595 | ||
9cf10d62 VK |
596 | wil_dbg_misc(wil, "%s()\n", __func__); |
597 | ||
2acb4220 | 598 | if (vring->va) |
2be7d22f | 599 | wil_vring_free(wil, vring, 0); |
2be7d22f VK |
600 | } |
601 | ||
602 | int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, | |
603 | int cid, int tid) | |
604 | { | |
605 | int rc; | |
606 | struct wmi_vring_cfg_cmd cmd = { | |
607 | .action = cpu_to_le32(WMI_VRING_CMD_ADD), | |
608 | .vring_cfg = { | |
609 | .tx_sw_ring = { | |
9a06bec9 | 610 | .max_mpdu_size = |
c44690a1 | 611 | cpu_to_le16(wil_mtu2macbuf(mtu_max)), |
b5d98e9d | 612 | .ring_size = cpu_to_le16(size), |
2be7d22f VK |
613 | }, |
614 | .ringid = id, | |
a70abea5 | 615 | .cidxtid = mk_cidxtid(cid, tid), |
2be7d22f VK |
616 | .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, |
617 | .mac_ctrl = 0, | |
618 | .to_resolution = 0, | |
3277213f | 619 | .agg_max_wsize = 0, |
2be7d22f VK |
620 | .schd_params = { |
621 | .priority = cpu_to_le16(0), | |
622 | .timeslot_us = cpu_to_le16(0xfff), | |
623 | }, | |
624 | }, | |
625 | }; | |
626 | struct { | |
627 | struct wil6210_mbox_hdr_wmi wmi; | |
628 | struct wmi_vring_cfg_done_event cmd; | |
629 | } __packed reply; | |
630 | struct vring *vring = &wil->vring_tx[id]; | |
097638a0 | 631 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
2be7d22f | 632 | |
e0106ada VK |
633 | wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, |
634 | cmd.vring_cfg.tx_sw_ring.max_mpdu_size); | |
9cf10d62 | 635 | |
2be7d22f VK |
636 | if (vring->va) { |
637 | wil_err(wil, "Tx ring [%d] already allocated\n", id); | |
638 | rc = -EINVAL; | |
639 | goto out; | |
640 | } | |
641 | ||
097638a0 | 642 | memset(txdata, 0, sizeof(*txdata)); |
5933a06d | 643 | spin_lock_init(&txdata->lock); |
2be7d22f VK |
644 | vring->size = size; |
645 | rc = wil_vring_alloc(wil, vring); | |
646 | if (rc) | |
647 | goto out; | |
648 | ||
93ae6d49 VK |
649 | wil->vring2cid_tid[id][0] = cid; |
650 | wil->vring2cid_tid[id][1] = tid; | |
651 | ||
2be7d22f | 652 | cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); |
2be7d22f VK |
653 | |
654 | rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), | |
655 | WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); | |
656 | if (rc) | |
657 | goto out_free; | |
658 | ||
b8023177 | 659 | if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { |
2be7d22f VK |
660 | wil_err(wil, "Tx config failed, status 0x%02x\n", |
661 | reply.cmd.status); | |
c331997b | 662 | rc = -EINVAL; |
2be7d22f VK |
663 | goto out_free; |
664 | } | |
665 | vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); | |
666 | ||
097638a0 | 667 | txdata->enabled = 1; |
3a3def8d VK |
668 | if (wil->sta[cid].data_port_open && (agg_wsize >= 0)) |
669 | wil_addba_tx_request(wil, id, agg_wsize); | |
097638a0 | 670 | |
2be7d22f VK |
671 | return 0; |
672 | out_free: | |
673 | wil_vring_free(wil, vring, 1); | |
674 | out: | |
675 | ||
676 | return rc; | |
677 | } | |
678 | ||
679 | void wil_vring_fini_tx(struct wil6210_priv *wil, int id) | |
680 | { | |
681 | struct vring *vring = &wil->vring_tx[id]; | |
3a124ed6 | 682 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
2be7d22f | 683 | |
097638a0 VK |
684 | WARN_ON(!mutex_is_locked(&wil->mutex)); |
685 | ||
2be7d22f VK |
686 | if (!vring->va) |
687 | return; | |
688 | ||
9cf10d62 VK |
689 | wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); |
690 | ||
5933a06d VK |
691 | spin_lock_bh(&txdata->lock); |
692 | txdata->enabled = 0; /* no Tx can be in progress or start anew */ | |
693 | spin_unlock_bh(&txdata->lock); | |
097638a0 | 694 | /* make sure NAPI won't touch this vring */ |
9419b6a2 | 695 | if (test_bit(wil_status_napi_en, wil->status)) |
097638a0 VK |
696 | napi_synchronize(&wil->napi_tx); |
697 | ||
2be7d22f | 698 | wil_vring_free(wil, vring, 1); |
3a124ed6 | 699 | memset(txdata, 0, sizeof(*txdata)); |
2be7d22f VK |
700 | } |
701 | ||
702 | static struct vring *wil_find_tx_vring(struct wil6210_priv *wil, | |
703 | struct sk_buff *skb) | |
704 | { | |
3df2cd36 VK |
705 | int i; |
706 | struct ethhdr *eth = (void *)skb->data; | |
707 | int cid = wil_find_cid(wil, eth->h_dest); | |
708 | ||
709 | if (cid < 0) | |
710 | return NULL; | |
2be7d22f | 711 | |
e58c9f70 VK |
712 | if (!wil->sta[cid].data_port_open && |
713 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) | |
714 | return NULL; | |
715 | ||
3df2cd36 VK |
716 | /* TODO: fix for multiple TID */ |
717 | for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { | |
718 | if (wil->vring2cid_tid[i][0] == cid) { | |
719 | struct vring *v = &wil->vring_tx[i]; | |
8fe59627 | 720 | |
3df2cd36 VK |
721 | wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", |
722 | __func__, eth->h_dest, i); | |
723 | if (v->va) { | |
724 | return v; | |
725 | } else { | |
726 | wil_dbg_txrx(wil, "vring[%d] not valid\n", i); | |
727 | return NULL; | |
728 | } | |
729 | } | |
730 | } | |
2be7d22f VK |
731 | |
732 | return NULL; | |
733 | } | |
734 | ||
fb3cac57 VK |
735 | static void wil_set_da_for_vring(struct wil6210_priv *wil, |
736 | struct sk_buff *skb, int vring_index) | |
737 | { | |
738 | struct ethhdr *eth = (void *)skb->data; | |
739 | int cid = wil->vring2cid_tid[vring_index][0]; | |
8fe59627 | 740 | |
fb3cac57 VK |
741 | memcpy(eth->h_dest, wil->sta[cid].addr, ETH_ALEN); |
742 | } | |
743 | ||
744 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, | |
745 | struct sk_buff *skb); | |
54ed90a8 VK |
746 | |
747 | static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, | |
748 | struct sk_buff *skb) | |
749 | { | |
750 | struct vring *v; | |
751 | int i; | |
752 | u8 cid; | |
753 | ||
754 | /* In the STA mode, it is expected to have only 1 VRING | |
755 | * for the AP we connected to. | |
756 | * find 1-st vring and see whether it is eligible for data | |
757 | */ | |
758 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { | |
759 | v = &wil->vring_tx[i]; | |
760 | if (!v->va) | |
761 | continue; | |
762 | ||
763 | cid = wil->vring2cid_tid[i][0]; | |
764 | if (!wil->sta[cid].data_port_open && | |
765 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) | |
766 | break; | |
767 | ||
768 | wil_dbg_txrx(wil, "Tx -> ring %d\n", i); | |
769 | ||
770 | return v; | |
771 | } | |
772 | ||
773 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); | |
774 | ||
775 | return NULL; | |
776 | } | |
777 | ||
fb3cac57 VK |
778 | /* |
779 | * Find 1-st vring and return it; set dest address for this vring in skb | |
780 | * duplicate skb and send it to other active vrings | |
781 | */ | |
782 | static struct vring *wil_tx_bcast(struct wil6210_priv *wil, | |
8fe59627 | 783 | struct sk_buff *skb) |
fb3cac57 VK |
784 | { |
785 | struct vring *v, *v2; | |
786 | struct sk_buff *skb2; | |
787 | int i; | |
e58c9f70 | 788 | u8 cid; |
fb3cac57 | 789 | |
e58c9f70 | 790 | /* find 1-st vring eligible for data */ |
fb3cac57 VK |
791 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { |
792 | v = &wil->vring_tx[i]; | |
e58c9f70 VK |
793 | if (!v->va) |
794 | continue; | |
795 | ||
796 | cid = wil->vring2cid_tid[i][0]; | |
797 | if (!wil->sta[cid].data_port_open) | |
798 | continue; | |
799 | ||
800 | goto found; | |
fb3cac57 VK |
801 | } |
802 | ||
5aed1393 | 803 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); |
fb3cac57 VK |
804 | |
805 | return NULL; | |
806 | ||
807 | found: | |
808 | wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); | |
809 | wil_set_da_for_vring(wil, skb, i); | |
810 | ||
811 | /* find other active vrings and duplicate skb for each */ | |
812 | for (i++; i < WIL6210_MAX_TX_RINGS; i++) { | |
813 | v2 = &wil->vring_tx[i]; | |
814 | if (!v2->va) | |
815 | continue; | |
e58c9f70 VK |
816 | cid = wil->vring2cid_tid[i][0]; |
817 | if (!wil->sta[cid].data_port_open) | |
818 | continue; | |
819 | ||
fb3cac57 VK |
820 | skb2 = skb_copy(skb, GFP_ATOMIC); |
821 | if (skb2) { | |
822 | wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); | |
823 | wil_set_da_for_vring(wil, skb2, i); | |
824 | wil_tx_vring(wil, v2, skb2); | |
825 | } else { | |
826 | wil_err(wil, "skb_copy failed\n"); | |
827 | } | |
828 | } | |
829 | ||
830 | return v; | |
831 | } | |
832 | ||
99b55bd2 KE |
833 | static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, |
834 | int vring_index) | |
2be7d22f | 835 | { |
68ada71e | 836 | wil_desc_addr_set(&d->dma.addr, pa); |
2be7d22f VK |
837 | d->dma.ip_length = 0; |
838 | /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ | |
839 | d->dma.b11 = 0/*14 | BIT(7)*/; | |
840 | d->dma.error = 0; | |
841 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ | |
7e594444 | 842 | d->dma.length = cpu_to_le16((u16)len); |
99b55bd2 | 843 | d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); |
2be7d22f VK |
844 | d->mac.d[0] = 0; |
845 | d->mac.d[1] = 0; | |
846 | d->mac.d[2] = 0; | |
847 | d->mac.ucode_cmd = 0; | |
2be7d22f VK |
848 | /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ |
849 | d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | | |
850 | (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); | |
851 | ||
852 | return 0; | |
853 | } | |
854 | ||
c236658f VK |
855 | static inline |
856 | void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) | |
857 | { | |
858 | d->mac.d[2] |= ((nr_frags + 1) << | |
859 | MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); | |
860 | } | |
861 | ||
504937d4 | 862 | static int wil_tx_desc_offload_cksum_set(struct wil6210_priv *wil, |
8fe59627 VK |
863 | struct vring_tx_desc *d, |
864 | struct sk_buff *skb) | |
504937d4 KE |
865 | { |
866 | int protocol; | |
867 | ||
868 | if (skb->ip_summed != CHECKSUM_PARTIAL) | |
869 | return 0; | |
870 | ||
df2d08ee VK |
871 | d->dma.b11 = ETH_HLEN; /* MAC header length */ |
872 | ||
504937d4 KE |
873 | switch (skb->protocol) { |
874 | case cpu_to_be16(ETH_P_IP): | |
875 | protocol = ip_hdr(skb)->protocol; | |
df2d08ee | 876 | d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); |
504937d4 KE |
877 | break; |
878 | case cpu_to_be16(ETH_P_IPV6): | |
879 | protocol = ipv6_hdr(skb)->nexthdr; | |
880 | break; | |
881 | default: | |
882 | return -EINVAL; | |
883 | } | |
884 | ||
885 | switch (protocol) { | |
886 | case IPPROTO_TCP: | |
887 | d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); | |
888 | /* L4 header len: TCP header length */ | |
889 | d->dma.d0 |= | |
890 | (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); | |
891 | break; | |
892 | case IPPROTO_UDP: | |
893 | /* L4 header len: UDP header length */ | |
894 | d->dma.d0 |= | |
895 | (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); | |
896 | break; | |
897 | default: | |
898 | return -EINVAL; | |
899 | } | |
900 | ||
901 | d->dma.ip_length = skb_network_header_len(skb); | |
504937d4 KE |
902 | /* Enable TCP/UDP checksum */ |
903 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); | |
904 | /* Calculate pseudo-header */ | |
905 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); | |
906 | ||
907 | return 0; | |
908 | } | |
909 | ||
5933a06d VK |
910 | static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
911 | struct sk_buff *skb) | |
2be7d22f VK |
912 | { |
913 | struct device *dev = wil_to_dev(wil); | |
68ada71e VK |
914 | struct vring_tx_desc dd, *d = ⅆ |
915 | volatile struct vring_tx_desc *_d; | |
2be7d22f VK |
916 | u32 swhead = vring->swhead; |
917 | int avail = wil_vring_avail_tx(vring); | |
918 | int nr_frags = skb_shinfo(skb)->nr_frags; | |
504937d4 | 919 | uint f = 0; |
2be7d22f | 920 | int vring_index = vring - wil->vring_tx; |
7c0acf86 | 921 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; |
2be7d22f VK |
922 | uint i = swhead; |
923 | dma_addr_t pa; | |
924 | ||
7743882d | 925 | wil_dbg_txrx(wil, "%s()\n", __func__); |
2be7d22f | 926 | |
5933a06d VK |
927 | if (unlikely(!txdata->enabled)) |
928 | return -EINVAL; | |
929 | ||
33c477fd | 930 | if (unlikely(avail < 1 + nr_frags)) { |
70801e1b | 931 | wil_err_ratelimited(wil, |
5b29c573 VK |
932 | "Tx ring[%2d] full. No space for %d fragments\n", |
933 | vring_index, 1 + nr_frags); | |
2be7d22f VK |
934 | return -ENOMEM; |
935 | } | |
8fe59627 | 936 | _d = &vring->va[i].tx; |
2be7d22f | 937 | |
8fe59627 | 938 | pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); |
2be7d22f | 939 | |
5b29c573 VK |
940 | wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, |
941 | skb_headlen(skb), skb->data, &pa); | |
7743882d | 942 | wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, |
2be7d22f VK |
943 | skb->data, skb_headlen(skb), false); |
944 | ||
945 | if (unlikely(dma_mapping_error(dev, pa))) | |
946 | return -EINVAL; | |
2232abd5 | 947 | vring->ctx[i].mapped_as = wil_mapped_as_single; |
2be7d22f | 948 | /* 1-st segment */ |
99b55bd2 | 949 | wil_tx_desc_map(d, pa, skb_headlen(skb), vring_index); |
504937d4 | 950 | /* Process TCP/UDP checksum offloading */ |
33c477fd | 951 | if (unlikely(wil_tx_desc_offload_cksum_set(wil, d, skb))) { |
5b29c573 | 952 | wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", |
504937d4 KE |
953 | vring_index); |
954 | goto dma_error; | |
955 | } | |
956 | ||
c236658f VK |
957 | vring->ctx[i].nr_frags = nr_frags; |
958 | wil_tx_desc_set_nr_frags(d, nr_frags); | |
68ada71e | 959 | |
2be7d22f | 960 | /* middle segments */ |
504937d4 | 961 | for (; f < nr_frags; f++) { |
2be7d22f VK |
962 | const struct skb_frag_struct *frag = |
963 | &skb_shinfo(skb)->frags[f]; | |
964 | int len = skb_frag_size(frag); | |
8fe59627 | 965 | |
e59d16c0 | 966 | *_d = *d; |
5b29c573 VK |
967 | wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); |
968 | wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, | |
969 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 970 | i = (swhead + f + 1) % vring->size; |
8fe59627 | 971 | _d = &vring->va[i].tx; |
2be7d22f | 972 | pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), |
8fe59627 | 973 | DMA_TO_DEVICE); |
2be7d22f VK |
974 | if (unlikely(dma_mapping_error(dev, pa))) |
975 | goto dma_error; | |
2232abd5 | 976 | vring->ctx[i].mapped_as = wil_mapped_as_page; |
99b55bd2 | 977 | wil_tx_desc_map(d, pa, len, vring_index); |
c236658f VK |
978 | /* no need to check return code - |
979 | * if it succeeded for 1-st descriptor, | |
980 | * it will succeed here too | |
981 | */ | |
982 | wil_tx_desc_offload_cksum_set(wil, d, skb); | |
2be7d22f VK |
983 | } |
984 | /* for the last seg only */ | |
985 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); | |
668b2bbd | 986 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); |
2be7d22f | 987 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); |
68ada71e | 988 | *_d = *d; |
5b29c573 VK |
989 | wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); |
990 | wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, | |
991 | (const void *)d, sizeof(*d), false); | |
2be7d22f | 992 | |
6cdadd4d VK |
993 | /* hold reference to skb |
994 | * to prevent skb release before accounting | |
995 | * in case of immediate "tx done" | |
996 | */ | |
997 | vring->ctx[i].skb = skb_get(skb); | |
998 | ||
7c0acf86 VK |
999 | if (wil_vring_is_empty(vring)) /* performance monitoring */ |
1000 | txdata->idle += get_cycles() - txdata->last_idle; | |
1001 | ||
2be7d22f VK |
1002 | /* advance swhead */ |
1003 | wil_vring_advance_head(vring, nr_frags + 1); | |
5b29c573 VK |
1004 | wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, |
1005 | vring->swhead); | |
98658095 | 1006 | trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); |
2be7d22f | 1007 | iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail)); |
2be7d22f VK |
1008 | |
1009 | return 0; | |
1010 | dma_error: | |
1011 | /* unmap what we have mapped */ | |
c2a146f6 VK |
1012 | nr_frags = f + 1; /* frags mapped + one for skb head */ |
1013 | for (f = 0; f < nr_frags; f++) { | |
c2a146f6 | 1014 | struct wil_ctx *ctx; |
7e594444 | 1015 | |
2be7d22f | 1016 | i = (swhead + f) % vring->size; |
c2a146f6 | 1017 | ctx = &vring->ctx[i]; |
8fe59627 | 1018 | _d = &vring->va[i].tx; |
68ada71e VK |
1019 | *d = *_d; |
1020 | _d->dma.status = TX_DMA_STATUS_DU; | |
2232abd5 | 1021 | wil_txdesc_unmap(dev, d, ctx); |
f88f113a VK |
1022 | |
1023 | if (ctx->skb) | |
1024 | dev_kfree_skb_any(ctx->skb); | |
1025 | ||
1026 | memset(ctx, 0, sizeof(*ctx)); | |
2be7d22f VK |
1027 | } |
1028 | ||
1029 | return -EINVAL; | |
1030 | } | |
1031 | ||
5933a06d VK |
1032 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
1033 | struct sk_buff *skb) | |
1034 | { | |
1035 | int vring_index = vring - wil->vring_tx; | |
1036 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; | |
1037 | int rc; | |
1038 | ||
1039 | spin_lock(&txdata->lock); | |
1040 | rc = __wil_tx_vring(wil, vring, skb); | |
1041 | spin_unlock(&txdata->lock); | |
1042 | return rc; | |
1043 | } | |
1044 | ||
2be7d22f VK |
1045 | netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
1046 | { | |
1047 | struct wil6210_priv *wil = ndev_to_wil(ndev); | |
3df2cd36 | 1048 | struct ethhdr *eth = (void *)skb->data; |
2be7d22f | 1049 | struct vring *vring; |
aa27deaa | 1050 | static bool pr_once_fw; |
2be7d22f VK |
1051 | int rc; |
1052 | ||
7743882d | 1053 | wil_dbg_txrx(wil, "%s()\n", __func__); |
33c477fd | 1054 | if (unlikely(!test_bit(wil_status_fwready, wil->status))) { |
aa27deaa VK |
1055 | if (!pr_once_fw) { |
1056 | wil_err(wil, "FW not ready\n"); | |
1057 | pr_once_fw = true; | |
1058 | } | |
2be7d22f VK |
1059 | goto drop; |
1060 | } | |
33c477fd | 1061 | if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { |
2be7d22f VK |
1062 | wil_err(wil, "FW not connected\n"); |
1063 | goto drop; | |
1064 | } | |
33c477fd | 1065 | if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { |
2be7d22f VK |
1066 | wil_err(wil, "Xmit in monitor mode not supported\n"); |
1067 | goto drop; | |
1068 | } | |
aa27deaa | 1069 | pr_once_fw = false; |
d58db4e4 VK |
1070 | |
1071 | /* find vring */ | |
54ed90a8 VK |
1072 | if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { |
1073 | /* in STA mode (ESS), all to same VRING */ | |
1074 | vring = wil_find_tx_vring_sta(wil, skb); | |
1075 | } else { /* direct communication, find matching VRING */ | |
1076 | if (is_unicast_ether_addr(eth->h_dest)) | |
1077 | vring = wil_find_tx_vring(wil, skb); | |
1078 | else | |
1079 | vring = wil_tx_bcast(wil, skb); | |
1080 | } | |
33c477fd | 1081 | if (unlikely(!vring)) { |
5aed1393 | 1082 | wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); |
d58db4e4 | 1083 | goto drop; |
2be7d22f | 1084 | } |
d58db4e4 VK |
1085 | /* set up vring entry */ |
1086 | rc = wil_tx_vring(wil, vring, skb); | |
1087 | ||
2232abd5 | 1088 | /* do we still have enough room in the vring? */ |
33c477fd | 1089 | if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { |
2232abd5 | 1090 | netif_tx_stop_all_queues(wil_to_ndev(wil)); |
55f8f680 VK |
1091 | wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); |
1092 | } | |
2232abd5 | 1093 | |
2be7d22f VK |
1094 | switch (rc) { |
1095 | case 0: | |
795ce734 | 1096 | /* statistics will be updated on the tx_complete */ |
2be7d22f VK |
1097 | dev_kfree_skb_any(skb); |
1098 | return NETDEV_TX_OK; | |
1099 | case -ENOMEM: | |
1100 | return NETDEV_TX_BUSY; | |
1101 | default: | |
afda8bb5 | 1102 | break; /* goto drop; */ |
2be7d22f VK |
1103 | } |
1104 | drop: | |
2be7d22f VK |
1105 | ndev->stats.tx_dropped++; |
1106 | dev_kfree_skb_any(skb); | |
1107 | ||
1108 | return NET_XMIT_DROP; | |
1109 | } | |
1110 | ||
713c8a29 VK |
1111 | static inline bool wil_need_txstat(struct sk_buff *skb) |
1112 | { | |
1113 | struct ethhdr *eth = (void *)skb->data; | |
1114 | ||
1115 | return is_unicast_ether_addr(eth->h_dest) && skb->sk && | |
1116 | (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); | |
1117 | } | |
1118 | ||
1119 | static inline void wil_consume_skb(struct sk_buff *skb, bool acked) | |
1120 | { | |
1121 | if (unlikely(wil_need_txstat(skb))) | |
1122 | skb_complete_wifi_ack(skb, acked); | |
1123 | else | |
1124 | acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); | |
1125 | } | |
1126 | ||
2be7d22f VK |
1127 | /** |
1128 | * Clean up transmitted skb's from the Tx VRING | |
1129 | * | |
e0287c4a VK |
1130 | * Return number of descriptors cleared |
1131 | * | |
2be7d22f VK |
1132 | * Safe to call from IRQ |
1133 | */ | |
e0287c4a | 1134 | int wil_tx_complete(struct wil6210_priv *wil, int ringid) |
2be7d22f | 1135 | { |
795ce734 | 1136 | struct net_device *ndev = wil_to_ndev(wil); |
2be7d22f VK |
1137 | struct device *dev = wil_to_dev(wil); |
1138 | struct vring *vring = &wil->vring_tx[ringid]; | |
097638a0 | 1139 | struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; |
e0287c4a | 1140 | int done = 0; |
c8b78b5f VK |
1141 | int cid = wil->vring2cid_tid[ringid][0]; |
1142 | struct wil_net_stats *stats = &wil->sta[cid].stats; | |
c236658f | 1143 | volatile struct vring_tx_desc *_d; |
2be7d22f | 1144 | |
33c477fd | 1145 | if (unlikely(!vring->va)) { |
2be7d22f | 1146 | wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); |
e0287c4a | 1147 | return 0; |
2be7d22f VK |
1148 | } |
1149 | ||
33c477fd | 1150 | if (unlikely(!txdata->enabled)) { |
097638a0 VK |
1151 | wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); |
1152 | return 0; | |
1153 | } | |
1154 | ||
7743882d | 1155 | wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); |
2be7d22f VK |
1156 | |
1157 | while (!wil_vring_is_empty(vring)) { | |
c236658f | 1158 | int new_swtail; |
f88f113a | 1159 | struct wil_ctx *ctx = &vring->ctx[vring->swtail]; |
c236658f VK |
1160 | /** |
1161 | * For the fragmented skb, HW will set DU bit only for the | |
1162 | * last fragment. look for it | |
1163 | */ | |
1164 | int lf = (vring->swtail + ctx->nr_frags) % vring->size; | |
1165 | /* TODO: check we are not past head */ | |
4de41bef | 1166 | |
c236658f | 1167 | _d = &vring->va[lf].tx; |
33c477fd | 1168 | if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) |
2be7d22f VK |
1169 | break; |
1170 | ||
c236658f VK |
1171 | new_swtail = (lf + 1) % vring->size; |
1172 | while (vring->swtail != new_swtail) { | |
1173 | struct vring_tx_desc dd, *d = ⅆ | |
c236658f | 1174 | u16 dmalen; |
76dfa4b7 VK |
1175 | struct sk_buff *skb; |
1176 | ||
1177 | ctx = &vring->ctx[vring->swtail]; | |
1178 | skb = ctx->skb; | |
c236658f | 1179 | _d = &vring->va[vring->swtail].tx; |
2be7d22f | 1180 | |
c236658f | 1181 | *d = *_d; |
f88f113a | 1182 | |
c236658f VK |
1183 | dmalen = le16_to_cpu(d->dma.length); |
1184 | trace_wil6210_tx_done(ringid, vring->swtail, dmalen, | |
1185 | d->dma.error); | |
1186 | wil_dbg_txrx(wil, | |
5b29c573 VK |
1187 | "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", |
1188 | ringid, vring->swtail, dmalen, | |
1189 | d->dma.status, d->dma.error); | |
1190 | wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, | |
c236658f | 1191 | (const void *)d, sizeof(*d), false); |
795ce734 | 1192 | |
2232abd5 | 1193 | wil_txdesc_unmap(dev, d, ctx); |
c236658f VK |
1194 | |
1195 | if (skb) { | |
33c477fd | 1196 | if (likely(d->dma.error == 0)) { |
c236658f VK |
1197 | ndev->stats.tx_packets++; |
1198 | stats->tx_packets++; | |
1199 | ndev->stats.tx_bytes += skb->len; | |
1200 | stats->tx_bytes += skb->len; | |
1201 | } else { | |
1202 | ndev->stats.tx_errors++; | |
1203 | stats->tx_errors++; | |
1204 | } | |
713c8a29 | 1205 | wil_consume_skb(skb, d->dma.error == 0); |
c236658f VK |
1206 | } |
1207 | memset(ctx, 0, sizeof(*ctx)); | |
1208 | /* There is no need to touch HW descriptor: | |
1209 | * - ststus bit TX_DMA_STATUS_DU is set by design, | |
1210 | * so hardware will not try to process this desc., | |
1211 | * - rest of descriptor will be initialized on Tx. | |
1212 | */ | |
1213 | vring->swtail = wil_vring_next_tail(vring); | |
1214 | done++; | |
2be7d22f | 1215 | } |
2be7d22f | 1216 | } |
67c3e1b4 | 1217 | |
7c0acf86 | 1218 | if (wil_vring_is_empty(vring)) { /* performance monitoring */ |
67c3e1b4 | 1219 | wil_dbg_txrx(wil, "Ring[%2d] empty\n", ringid); |
7c0acf86 VK |
1220 | txdata->last_idle = get_cycles(); |
1221 | } | |
67c3e1b4 | 1222 | |
55f8f680 VK |
1223 | if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { |
1224 | wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); | |
2be7d22f | 1225 | netif_tx_wake_all_queues(wil_to_ndev(wil)); |
55f8f680 | 1226 | } |
e0287c4a VK |
1227 | |
1228 | return done; | |
2be7d22f | 1229 | } |