Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1 | /* |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 2 | * Copyright (c) 2012-2016 Qualcomm Atheros, Inc. |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 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 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 17 | #include <linux/etherdevice.h> |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 18 | #include <net/ieee80211_radiotap.h> |
| 19 | #include <linux/if_arp.h> |
| 20 | #include <linux/moduleparam.h> |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 21 | #include <linux/ip.h> |
| 22 | #include <linux/ipv6.h> |
| 23 | #include <net/ipv6.h> |
Vladimir Kondratiev | 0786dc4 | 2014-01-14 20:31:26 +0200 | [diff] [blame] | 24 | #include <linux/prefetch.h> |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 25 | |
| 26 | #include "wil6210.h" |
| 27 | #include "wmi.h" |
| 28 | #include "txrx.h" |
Vladimir Kondratiev | 9865809 | 2013-05-12 14:43:35 +0300 | [diff] [blame] | 29 | #include "trace.h" |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 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 | |
Vladimir Kondratiev | c406ea7 | 2015-03-15 16:00:19 +0200 | [diff] [blame] | 36 | bool rx_align_2; |
| 37 | module_param(rx_align_2, bool, S_IRUGO); |
| 38 | MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); |
| 39 | |
| 40 | static inline uint wil_rx_snaplen(void) |
| 41 | { |
| 42 | return rx_align_2 ? 6 : 0; |
| 43 | } |
| 44 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 45 | static inline int wil_vring_is_empty(struct vring *vring) |
| 46 | { |
| 47 | return vring->swhead == vring->swtail; |
| 48 | } |
| 49 | |
| 50 | static inline u32 wil_vring_next_tail(struct vring *vring) |
| 51 | { |
| 52 | return (vring->swtail + 1) % vring->size; |
| 53 | } |
| 54 | |
| 55 | static inline void wil_vring_advance_head(struct vring *vring, int n) |
| 56 | { |
| 57 | vring->swhead = (vring->swhead + n) % vring->size; |
| 58 | } |
| 59 | |
| 60 | static inline int wil_vring_is_full(struct vring *vring) |
| 61 | { |
| 62 | return wil_vring_next_tail(vring) == vring->swhead; |
| 63 | } |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 64 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 65 | /* Used space in Tx Vring */ |
| 66 | static inline int wil_vring_used_tx(struct vring *vring) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 67 | { |
| 68 | u32 swhead = vring->swhead; |
| 69 | u32 swtail = vring->swtail; |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 70 | return (vring->size + swhead - swtail) % vring->size; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 71 | } |
| 72 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 73 | /* Available space in Tx Vring */ |
| 74 | static inline int wil_vring_avail_tx(struct vring *vring) |
| 75 | { |
| 76 | return vring->size - wil_vring_used_tx(vring) - 1; |
| 77 | } |
| 78 | |
| 79 | /* wil_vring_wmark_low - low watermark for available descriptor space */ |
Vladimir Kondratiev | 5bb6423 | 2014-05-27 14:45:46 +0300 | [diff] [blame] | 80 | static inline int wil_vring_wmark_low(struct vring *vring) |
| 81 | { |
| 82 | return vring->size/8; |
| 83 | } |
| 84 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 85 | /* wil_vring_wmark_high - high watermark for available descriptor space */ |
Vladimir Kondratiev | 5bb6423 | 2014-05-27 14:45:46 +0300 | [diff] [blame] | 86 | static inline int wil_vring_wmark_high(struct vring *vring) |
| 87 | { |
| 88 | return vring->size/4; |
| 89 | } |
| 90 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 91 | /* wil_val_in_range - check if value in [min,max) */ |
| 92 | static inline bool wil_val_in_range(int val, int min, int max) |
| 93 | { |
| 94 | return val >= min && val < max; |
| 95 | } |
| 96 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 97 | static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) |
| 98 | { |
| 99 | struct device *dev = wil_to_dev(wil); |
| 100 | size_t sz = vring->size * sizeof(vring->va[0]); |
| 101 | uint i; |
| 102 | |
Vladimir Kondratiev | 9cf10d6 | 2014-09-10 16:34:36 +0300 | [diff] [blame] | 103 | wil_dbg_misc(wil, "%s()\n", __func__); |
| 104 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 105 | BUILD_BUG_ON(sizeof(vring->va[0]) != 32); |
| 106 | |
| 107 | vring->swhead = 0; |
| 108 | vring->swtail = 0; |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 109 | vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 110 | if (!vring->ctx) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 111 | vring->va = NULL; |
| 112 | return -ENOMEM; |
| 113 | } |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 114 | /* vring->va should be aligned on its size rounded up to power of 2 |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 115 | * This is granted by the dma_alloc_coherent |
| 116 | */ |
| 117 | vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); |
| 118 | if (!vring->va) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 119 | kfree(vring->ctx); |
| 120 | vring->ctx = NULL; |
| 121 | return -ENOMEM; |
| 122 | } |
| 123 | /* initially, all descriptors are SW owned |
| 124 | * For Tx and Rx, ownership bit is at the same location, thus |
| 125 | * we can use any |
| 126 | */ |
| 127 | for (i = 0; i < vring->size; i++) { |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 128 | volatile struct vring_tx_desc *_d = &vring->va[i].tx; |
| 129 | |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 130 | _d->dma.status = TX_DMA_STATUS_DU; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 131 | } |
| 132 | |
Vladimir Kondratiev | 39c52ee | 2014-05-27 14:45:49 +0300 | [diff] [blame] | 133 | wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, |
| 134 | vring->va, &vring->pa, vring->ctx); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 135 | |
| 136 | return 0; |
| 137 | } |
| 138 | |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 139 | static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, |
| 140 | struct wil_ctx *ctx) |
| 141 | { |
| 142 | dma_addr_t pa = wil_desc_addr(&d->dma.addr); |
| 143 | u16 dmalen = le16_to_cpu(d->dma.length); |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 144 | |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 145 | switch (ctx->mapped_as) { |
| 146 | case wil_mapped_as_single: |
| 147 | dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); |
| 148 | break; |
| 149 | case wil_mapped_as_page: |
| 150 | dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); |
| 151 | break; |
| 152 | default: |
| 153 | break; |
| 154 | } |
| 155 | } |
| 156 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 157 | static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, |
| 158 | int tx) |
| 159 | { |
| 160 | struct device *dev = wil_to_dev(wil); |
| 161 | size_t sz = vring->size * sizeof(vring->va[0]); |
| 162 | |
Vladimir Kondratiev | 9b1ba7b | 2015-11-06 12:50:44 +0200 | [diff] [blame] | 163 | lockdep_assert_held(&wil->mutex); |
Vladimir Kondratiev | ef77285 | 2014-09-10 16:34:31 +0300 | [diff] [blame] | 164 | if (tx) { |
| 165 | int vring_index = vring - wil->vring_tx; |
| 166 | |
| 167 | wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", |
| 168 | vring_index, vring->size, vring->va, |
| 169 | &vring->pa, vring->ctx); |
| 170 | } else { |
| 171 | wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", |
| 172 | vring->size, vring->va, |
| 173 | &vring->pa, vring->ctx); |
| 174 | } |
| 175 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 176 | while (!wil_vring_is_empty(vring)) { |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 177 | dma_addr_t pa; |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 178 | u16 dmalen; |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 179 | struct wil_ctx *ctx; |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 180 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 181 | if (tx) { |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 182 | struct vring_tx_desc dd, *d = ⅆ |
| 183 | volatile struct vring_tx_desc *_d = |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 184 | &vring->va[vring->swtail].tx; |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 185 | |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 186 | ctx = &vring->ctx[vring->swtail]; |
Maya Erez | 34b8886 | 2016-05-16 22:23:32 +0300 | [diff] [blame] | 187 | if (!ctx) { |
| 188 | wil_dbg_txrx(wil, |
| 189 | "ctx(%d) was already completed\n", |
| 190 | vring->swtail); |
| 191 | vring->swtail = wil_vring_next_tail(vring); |
| 192 | continue; |
| 193 | } |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 194 | *d = *_d; |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 195 | wil_txdesc_unmap(dev, d, ctx); |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 196 | if (ctx->skb) |
| 197 | dev_kfree_skb_any(ctx->skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 198 | vring->swtail = wil_vring_next_tail(vring); |
| 199 | } else { /* rx */ |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 200 | struct vring_rx_desc dd, *d = ⅆ |
| 201 | volatile struct vring_rx_desc *_d = |
Vladimir Kondratiev | 4d1ac07 | 2013-07-11 18:03:38 +0300 | [diff] [blame] | 202 | &vring->va[vring->swhead].rx; |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 203 | |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 204 | ctx = &vring->ctx[vring->swhead]; |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 205 | *d = *_d; |
| 206 | pa = wil_desc_addr(&d->dma.addr); |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 207 | dmalen = le16_to_cpu(d->dma.length); |
| 208 | dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 209 | kfree_skb(ctx->skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 210 | wil_vring_advance_head(vring, 1); |
| 211 | } |
| 212 | } |
| 213 | dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); |
| 214 | kfree(vring->ctx); |
| 215 | vring->pa = 0; |
| 216 | vring->va = NULL; |
| 217 | vring->ctx = NULL; |
| 218 | } |
| 219 | |
| 220 | /** |
| 221 | * Allocate one skb for Rx VRING |
| 222 | * |
| 223 | * Safe to call from IRQ |
| 224 | */ |
| 225 | static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, |
| 226 | u32 i, int headroom) |
| 227 | { |
| 228 | struct device *dev = wil_to_dev(wil); |
Vladimir Kondratiev | c406ea7 | 2015-03-15 16:00:19 +0200 | [diff] [blame] | 229 | unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen(); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 230 | struct vring_rx_desc dd, *d = ⅆ |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 231 | volatile struct vring_rx_desc *_d = &vring->va[i].rx; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 232 | dma_addr_t pa; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 233 | struct sk_buff *skb = dev_alloc_skb(sz + headroom); |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 234 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 235 | if (unlikely(!skb)) |
| 236 | return -ENOMEM; |
| 237 | |
| 238 | skb_reserve(skb, headroom); |
| 239 | skb_put(skb, sz); |
| 240 | |
| 241 | pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); |
| 242 | if (unlikely(dma_mapping_error(dev, pa))) { |
| 243 | kfree_skb(skb); |
| 244 | return -ENOMEM; |
| 245 | } |
| 246 | |
Vladimir Kondratiev | 48c963a | 2015-04-30 16:25:06 +0300 | [diff] [blame] | 247 | d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 248 | wil_desc_addr_set(&d->dma.addr, pa); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 249 | /* ip_length don't care */ |
| 250 | /* b11 don't care */ |
| 251 | /* error don't care */ |
| 252 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 253 | d->dma.length = cpu_to_le16(sz); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 254 | *_d = *d; |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 255 | vring->ctx[i].skb = skb; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * Adds radiotap header |
| 262 | * |
| 263 | * Any error indicated as "Bad FCS" |
| 264 | * |
| 265 | * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: |
| 266 | * - Rx descriptor: 32 bytes |
| 267 | * - Phy info |
| 268 | */ |
| 269 | static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, |
Vladimir Kondratiev | 33e6116 | 2013-04-18 14:33:50 +0300 | [diff] [blame] | 270 | struct sk_buff *skb) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 271 | { |
| 272 | struct wireless_dev *wdev = wil->wdev; |
| 273 | struct wil6210_rtap { |
| 274 | struct ieee80211_radiotap_header rthdr; |
| 275 | /* fields should be in the order of bits in rthdr.it_present */ |
| 276 | /* flags */ |
| 277 | u8 flags; |
| 278 | /* channel */ |
| 279 | __le16 chnl_freq __aligned(2); |
| 280 | __le16 chnl_flags; |
| 281 | /* MCS */ |
| 282 | u8 mcs_present; |
| 283 | u8 mcs_flags; |
| 284 | u8 mcs_index; |
| 285 | } __packed; |
| 286 | struct wil6210_rtap_vendor { |
| 287 | struct wil6210_rtap rtap; |
| 288 | /* vendor */ |
| 289 | u8 vendor_oui[3] __aligned(2); |
| 290 | u8 vendor_ns; |
| 291 | __le16 vendor_skip; |
| 292 | u8 vendor_data[0]; |
| 293 | } __packed; |
Vladimir Kondratiev | 33e6116 | 2013-04-18 14:33:50 +0300 | [diff] [blame] | 294 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 295 | struct wil6210_rtap_vendor *rtap_vendor; |
| 296 | int rtap_len = sizeof(struct wil6210_rtap); |
| 297 | int phy_length = 0; /* phy info header size, bytes */ |
| 298 | static char phy_data[128]; |
| 299 | struct ieee80211_channel *ch = wdev->preset_chandef.chan; |
| 300 | |
| 301 | if (rtap_include_phy_info) { |
| 302 | rtap_len = sizeof(*rtap_vendor) + sizeof(*d); |
| 303 | /* calculate additional length */ |
| 304 | if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { |
| 305 | /** |
| 306 | * PHY info starts from 8-byte boundary |
| 307 | * there are 8-byte lines, last line may be partially |
| 308 | * written (HW bug), thus FW configures for last line |
| 309 | * to be excessive. Driver skips this last line. |
| 310 | */ |
| 311 | int len = min_t(int, 8 + sizeof(phy_data), |
| 312 | wil_rxdesc_phy_length(d)); |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 313 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 314 | if (len > 8) { |
| 315 | void *p = skb_tail_pointer(skb); |
| 316 | void *pa = PTR_ALIGN(p, 8); |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 317 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 318 | if (skb_tailroom(skb) >= len + (pa - p)) { |
| 319 | phy_length = len - 8; |
| 320 | memcpy(phy_data, pa, phy_length); |
| 321 | } |
| 322 | } |
| 323 | } |
| 324 | rtap_len += phy_length; |
| 325 | } |
| 326 | |
| 327 | if (skb_headroom(skb) < rtap_len && |
| 328 | pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { |
| 329 | wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); |
| 330 | return; |
| 331 | } |
| 332 | |
| 333 | rtap_vendor = (void *)skb_push(skb, rtap_len); |
| 334 | memset(rtap_vendor, 0, rtap_len); |
| 335 | |
| 336 | rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; |
| 337 | rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); |
| 338 | rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( |
| 339 | (1 << IEEE80211_RADIOTAP_FLAGS) | |
| 340 | (1 << IEEE80211_RADIOTAP_CHANNEL) | |
| 341 | (1 << IEEE80211_RADIOTAP_MCS)); |
| 342 | if (d->dma.status & RX_DMA_STATUS_ERROR) |
| 343 | rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; |
| 344 | |
| 345 | rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); |
| 346 | rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); |
| 347 | |
| 348 | rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; |
| 349 | rtap_vendor->rtap.mcs_flags = 0; |
| 350 | rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); |
| 351 | |
| 352 | if (rtap_include_phy_info) { |
| 353 | rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << |
| 354 | IEEE80211_RADIOTAP_VENDOR_NAMESPACE); |
| 355 | /* OUI for Wilocity 04:ce:14 */ |
| 356 | rtap_vendor->vendor_oui[0] = 0x04; |
| 357 | rtap_vendor->vendor_oui[1] = 0xce; |
| 358 | rtap_vendor->vendor_oui[2] = 0x14; |
| 359 | rtap_vendor->vendor_ns = 1; |
| 360 | /* Rx descriptor + PHY data */ |
| 361 | rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + |
| 362 | phy_length); |
| 363 | memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); |
| 364 | memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, |
| 365 | phy_length); |
| 366 | } |
| 367 | } |
| 368 | |
Vladimir Kondratiev | a831334 | 2015-10-04 10:23:23 +0300 | [diff] [blame] | 369 | /* similar to ieee80211_ version, but FC contain only 1-st byte */ |
| 370 | static inline int wil_is_back_req(u8 fc) |
| 371 | { |
| 372 | return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == |
| 373 | (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); |
| 374 | } |
| 375 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 376 | /** |
| 377 | * reap 1 frame from @swhead |
| 378 | * |
Vladimir Kondratiev | 33e6116 | 2013-04-18 14:33:50 +0300 | [diff] [blame] | 379 | * Rx descriptor copied to skb->cb |
| 380 | * |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 381 | * Safe to call from IRQ |
| 382 | */ |
| 383 | static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, |
| 384 | struct vring *vring) |
| 385 | { |
| 386 | struct device *dev = wil_to_dev(wil); |
| 387 | struct net_device *ndev = wil_to_ndev(wil); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 388 | volatile struct vring_rx_desc *_d; |
| 389 | struct vring_rx_desc *d; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 390 | struct sk_buff *skb; |
| 391 | dma_addr_t pa; |
Vladimir Kondratiev | c406ea7 | 2015-03-15 16:00:19 +0200 | [diff] [blame] | 392 | unsigned int snaplen = wil_rx_snaplen(); |
| 393 | unsigned int sz = mtu_max + ETH_HLEN + snaplen; |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 394 | u16 dmalen; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 395 | u8 ftype; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 396 | int cid; |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 397 | int i; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 398 | struct wil_net_stats *stats; |
| 399 | |
Vladimir Kondratiev | 33e6116 | 2013-04-18 14:33:50 +0300 | [diff] [blame] | 400 | BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); |
| 401 | |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 402 | again: |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 403 | if (unlikely(wil_vring_is_empty(vring))) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 404 | return NULL; |
| 405 | |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 406 | i = (int)vring->swhead; |
Vladimir Kondratiev | 148416a | 2015-03-15 16:00:16 +0200 | [diff] [blame] | 407 | _d = &vring->va[i].rx; |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 408 | if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 409 | /* it is not error, we just reached end of Rx done area */ |
| 410 | return NULL; |
| 411 | } |
| 412 | |
Vladimir Kondratiev | 148416a | 2015-03-15 16:00:16 +0200 | [diff] [blame] | 413 | skb = vring->ctx[i].skb; |
| 414 | vring->ctx[i].skb = NULL; |
| 415 | wil_vring_advance_head(vring, 1); |
| 416 | if (!skb) { |
| 417 | wil_err(wil, "No Rx skb at [%d]\n", i); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 418 | goto again; |
Vladimir Kondratiev | 148416a | 2015-03-15 16:00:16 +0200 | [diff] [blame] | 419 | } |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 420 | d = wil_skb_rxdesc(skb); |
| 421 | *d = *_d; |
| 422 | pa = wil_desc_addr(&d->dma.addr); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 423 | |
| 424 | dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); |
| 425 | dmalen = le16_to_cpu(d->dma.length); |
| 426 | |
Vladimir Kondratiev | 148416a | 2015-03-15 16:00:16 +0200 | [diff] [blame] | 427 | trace_wil6210_rx(i, d); |
| 428 | wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); |
Vladimir Kondratiev | a831334 | 2015-10-04 10:23:23 +0300 | [diff] [blame] | 429 | wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 430 | (const void *)d, sizeof(*d), false); |
| 431 | |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 432 | cid = wil_rxdesc_cid(d); |
| 433 | stats = &wil->sta[cid].stats; |
| 434 | |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 435 | if (unlikely(dmalen > sz)) { |
Vladimir Kondratiev | e270045 | 2013-05-12 14:43:33 +0300 | [diff] [blame] | 436 | wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 437 | stats->rx_large_frame++; |
Wei Yongjun | 110dea0 | 2013-05-23 17:10:43 +0800 | [diff] [blame] | 438 | kfree_skb(skb); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 439 | goto again; |
Vladimir Kondratiev | e270045 | 2013-05-12 14:43:33 +0300 | [diff] [blame] | 440 | } |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 441 | skb_trim(skb, dmalen); |
Vladimir Kondratiev | 33e6116 | 2013-04-18 14:33:50 +0300 | [diff] [blame] | 442 | |
Vladimir Kondratiev | 1cbbcb0 | 2014-01-08 11:50:49 +0200 | [diff] [blame] | 443 | prefetch(skb->data); |
| 444 | |
Vladimir Kondratiev | c0d3771 | 2013-05-12 14:43:34 +0300 | [diff] [blame] | 445 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, |
| 446 | skb->data, skb_headlen(skb), false); |
| 447 | |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 448 | stats->last_mcs_rx = wil_rxdesc_mcs(d); |
Vladimir Kondratiev | c4a110d | 2015-06-09 14:11:18 +0300 | [diff] [blame] | 449 | if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) |
| 450 | stats->rx_per_mcs[stats->last_mcs_rx]++; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 451 | |
| 452 | /* use radiotap header only if required */ |
| 453 | if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) |
Vladimir Kondratiev | 33e6116 | 2013-04-18 14:33:50 +0300 | [diff] [blame] | 454 | wil_rx_add_radiotap_header(wil, skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 455 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 456 | /* no extra checks if in sniffer mode */ |
| 457 | if (ndev->type != ARPHRD_ETHER) |
| 458 | return skb; |
Vladimir Kondratiev | a831334 | 2015-10-04 10:23:23 +0300 | [diff] [blame] | 459 | /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 460 | * Driver should recognize it by frame type, that is found |
| 461 | * in Rx descriptor. If type is not data, it is 802.11 frame as is |
| 462 | */ |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 463 | ftype = wil_rxdesc_ftype(d) << 2; |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 464 | if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { |
Vladimir Kondratiev | a831334 | 2015-10-04 10:23:23 +0300 | [diff] [blame] | 465 | u8 fc1 = wil_rxdesc_fc1(d); |
| 466 | int mid = wil_rxdesc_mid(d); |
| 467 | int tid = wil_rxdesc_tid(d); |
| 468 | u16 seq = wil_rxdesc_seq(d); |
| 469 | |
| 470 | wil_dbg_txrx(wil, |
| 471 | "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", |
| 472 | fc1, mid, cid, tid, seq); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 473 | stats->rx_non_data_frame++; |
Vladimir Kondratiev | a831334 | 2015-10-04 10:23:23 +0300 | [diff] [blame] | 474 | if (wil_is_back_req(fc1)) { |
| 475 | wil_dbg_txrx(wil, |
| 476 | "BAR: MID %d CID %d TID %d Seq 0x%03x\n", |
| 477 | mid, cid, tid, seq); |
| 478 | wil_rx_bar(wil, cid, tid, seq); |
| 479 | } else { |
| 480 | /* print again all info. One can enable only this |
| 481 | * without overhead for printing every Rx frame |
| 482 | */ |
| 483 | wil_dbg_txrx(wil, |
| 484 | "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", |
| 485 | fc1, mid, cid, tid, seq); |
| 486 | wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, |
| 487 | (const void *)d, sizeof(*d), false); |
| 488 | wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, |
| 489 | skb->data, skb_headlen(skb), false); |
| 490 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 491 | kfree_skb(skb); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 492 | goto again; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 493 | } |
| 494 | |
Vladimir Kondratiev | c406ea7 | 2015-03-15 16:00:19 +0200 | [diff] [blame] | 495 | if (unlikely(skb->len < ETH_HLEN + snaplen)) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 496 | wil_err(wil, "Short frame, len = %d\n", skb->len); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 497 | stats->rx_short_frame++; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 498 | kfree_skb(skb); |
Vladimir Kondratiev | 3b282bc | 2015-10-04 10:23:19 +0300 | [diff] [blame] | 499 | goto again; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 500 | } |
| 501 | |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 502 | /* L4 IDENT is on when HW calculated checksum, check status |
| 503 | * and in case of error drop the packet |
| 504 | * higher stack layers will handle retransmission (if required) |
| 505 | */ |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 506 | if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 507 | /* L4 protocol identified, csum calculated */ |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 508 | if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 509 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
Vladimir Kondratiev | 4a68ab10 | 2013-08-13 15:25:32 +0300 | [diff] [blame] | 510 | /* If HW reports bad checksum, let IP stack re-check it |
| 511 | * For example, HW don't understand Microsoft IP stack that |
| 512 | * mis-calculates TCP checksum - if it should be 0x0, |
| 513 | * it writes 0xffff in violation of RFC 1624 |
| 514 | */ |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 515 | } |
| 516 | |
Vladimir Kondratiev | c406ea7 | 2015-03-15 16:00:19 +0200 | [diff] [blame] | 517 | if (snaplen) { |
| 518 | /* Packet layout |
| 519 | * +-------+-------+---------+------------+------+ |
| 520 | * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | |
| 521 | * +-------+-------+---------+------------+------+ |
| 522 | * Need to remove SNAP, shifting SA and DA forward |
| 523 | */ |
| 524 | memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); |
| 525 | skb_pull(skb, snaplen); |
| 526 | } |
| 527 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 528 | return skb; |
| 529 | } |
| 530 | |
| 531 | /** |
| 532 | * allocate and fill up to @count buffers in rx ring |
| 533 | * buffers posted at @swtail |
| 534 | */ |
| 535 | static int wil_rx_refill(struct wil6210_priv *wil, int count) |
| 536 | { |
| 537 | struct net_device *ndev = wil_to_ndev(wil); |
| 538 | struct vring *v = &wil->vring_rx; |
| 539 | u32 next_tail; |
| 540 | int rc = 0; |
| 541 | int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? |
| 542 | WIL6210_RTAP_SIZE : 0; |
| 543 | |
| 544 | for (; next_tail = wil_vring_next_tail(v), |
| 545 | (next_tail != v->swhead) && (count-- > 0); |
| 546 | v->swtail = next_tail) { |
| 547 | rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 548 | if (unlikely(rc)) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 549 | wil_err(wil, "Error %d in wil_rx_refill[%d]\n", |
| 550 | rc, v->swtail); |
| 551 | break; |
| 552 | } |
| 553 | } |
Maya Erez | ab6d7cc | 2016-05-16 22:23:31 +0300 | [diff] [blame] | 554 | |
| 555 | /* make sure all writes to descriptors (shared memory) are done before |
| 556 | * committing them to HW |
| 557 | */ |
| 558 | wmb(); |
| 559 | |
Vladimir Kondratiev | b9eeb51 | 2015-07-30 13:52:03 +0300 | [diff] [blame] | 560 | wil_w(wil, v->hwtail, v->swtail); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 561 | |
| 562 | return rc; |
| 563 | } |
| 564 | |
Vladimir Kondratiev | 5852742 | 2016-03-01 19:18:07 +0200 | [diff] [blame] | 565 | /** |
| 566 | * reverse_memcmp - Compare two areas of memory, in reverse order |
| 567 | * @cs: One area of memory |
| 568 | * @ct: Another area of memory |
| 569 | * @count: The size of the area. |
| 570 | * |
| 571 | * Cut'n'paste from original memcmp (see lib/string.c) |
| 572 | * with minimal modifications |
| 573 | */ |
| 574 | static int reverse_memcmp(const void *cs, const void *ct, size_t count) |
| 575 | { |
| 576 | const unsigned char *su1, *su2; |
| 577 | int res = 0; |
| 578 | |
| 579 | for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; |
| 580 | --su1, --su2, count--) { |
| 581 | res = *su1 - *su2; |
| 582 | if (res) |
| 583 | break; |
| 584 | } |
| 585 | return res; |
| 586 | } |
| 587 | |
| 588 | static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) |
| 589 | { |
| 590 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
| 591 | int cid = wil_rxdesc_cid(d); |
| 592 | int tid = wil_rxdesc_tid(d); |
| 593 | int key_id = wil_rxdesc_key_id(d); |
| 594 | int mc = wil_rxdesc_mcast(d); |
| 595 | struct wil_sta_info *s = &wil->sta[cid]; |
| 596 | struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : |
| 597 | &s->tid_crypto_rx[tid]; |
| 598 | struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; |
| 599 | const u8 *pn = (u8 *)&d->mac.pn_15_0; |
| 600 | |
| 601 | if (!cc->key_set) { |
| 602 | wil_err_ratelimited(wil, |
| 603 | "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", |
| 604 | cid, tid, mc, key_id); |
| 605 | return -EINVAL; |
| 606 | } |
| 607 | |
| 608 | if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { |
| 609 | wil_err_ratelimited(wil, |
| 610 | "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", |
| 611 | cid, tid, mc, key_id, pn, cc->pn); |
| 612 | return -EINVAL; |
| 613 | } |
| 614 | memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); |
| 615 | |
| 616 | return 0; |
| 617 | } |
| 618 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 619 | /* |
| 620 | * Pass Rx packet to the netif. Update statistics. |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 621 | * Called in softirq context (NAPI poll). |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 622 | */ |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 623 | void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 624 | { |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 625 | gro_result_t rc = GRO_NORMAL; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 626 | struct wil6210_priv *wil = ndev_to_wil(ndev); |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 627 | struct wireless_dev *wdev = wil_to_wdev(wil); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 628 | unsigned int len = skb->len; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 629 | struct vring_rx_desc *d = wil_skb_rxdesc(skb); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 630 | int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ |
Vladimir Kondratiev | 5852742 | 2016-03-01 19:18:07 +0200 | [diff] [blame] | 631 | int security = wil_rxdesc_security(d); |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 632 | struct ethhdr *eth = (void *)skb->data; |
| 633 | /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication |
| 634 | * is not suitable, need to look at data |
| 635 | */ |
| 636 | int mcast = is_multicast_ether_addr(eth->h_dest); |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 637 | struct wil_net_stats *stats = &wil->sta[cid].stats; |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 638 | struct sk_buff *xmit_skb = NULL; |
| 639 | static const char * const gro_res_str[] = { |
| 640 | [GRO_MERGED] = "GRO_MERGED", |
| 641 | [GRO_MERGED_FREE] = "GRO_MERGED_FREE", |
| 642 | [GRO_HELD] = "GRO_HELD", |
| 643 | [GRO_NORMAL] = "GRO_NORMAL", |
| 644 | [GRO_DROP] = "GRO_DROP", |
| 645 | }; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 646 | |
Vladimir Shulman | 0553640 | 2015-07-30 13:52:04 +0300 | [diff] [blame] | 647 | if (ndev->features & NETIF_F_RXHASH) |
| 648 | /* fake L4 to ensure it won't be re-calculated later |
| 649 | * set hash to any non-zero value to activate rps |
| 650 | * mechanism, core will be chosen according |
| 651 | * to user-level rps configuration. |
| 652 | */ |
| 653 | skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); |
| 654 | |
Vladimir Kondratiev | 241804c | 2013-01-28 18:31:02 +0200 | [diff] [blame] | 655 | skb_orphan(skb); |
| 656 | |
Vladimir Kondratiev | 5852742 | 2016-03-01 19:18:07 +0200 | [diff] [blame] | 657 | if (security && (wil_rx_crypto_check(wil, skb) != 0)) { |
| 658 | rc = GRO_DROP; |
| 659 | dev_kfree_skb(skb); |
| 660 | stats->rx_replay++; |
| 661 | goto stats; |
| 662 | } |
| 663 | |
Vladimir Kondratiev | 02beaf1 | 2015-03-08 15:42:03 +0200 | [diff] [blame] | 664 | if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 665 | if (mcast) { |
| 666 | /* send multicast frames both to higher layers in |
| 667 | * local net stack and back to the wireless medium |
| 668 | */ |
| 669 | xmit_skb = skb_copy(skb, GFP_ATOMIC); |
| 670 | } else { |
| 671 | int xmit_cid = wil_find_cid(wil, eth->h_dest); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 672 | |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 673 | if (xmit_cid >= 0) { |
| 674 | /* The destination station is associated to |
| 675 | * this AP (in this VLAN), so send the frame |
| 676 | * directly to it and do not pass it to local |
| 677 | * net stack. |
| 678 | */ |
| 679 | xmit_skb = skb; |
| 680 | skb = NULL; |
| 681 | } |
| 682 | } |
| 683 | } |
| 684 | if (xmit_skb) { |
| 685 | /* Send to wireless media and increase priority by 256 to |
| 686 | * keep the received priority instead of reclassifying |
| 687 | * the frame (see cfg80211_classify8021d). |
| 688 | */ |
| 689 | xmit_skb->dev = ndev; |
| 690 | xmit_skb->priority += 256; |
| 691 | xmit_skb->protocol = htons(ETH_P_802_3); |
| 692 | skb_reset_network_header(xmit_skb); |
| 693 | skb_reset_mac_header(xmit_skb); |
| 694 | wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); |
| 695 | dev_queue_xmit(xmit_skb); |
| 696 | } |
| 697 | |
| 698 | if (skb) { /* deliver to local stack */ |
| 699 | |
| 700 | skb->protocol = eth_type_trans(skb, ndev); |
| 701 | rc = napi_gro_receive(&wil->napi_rx, skb); |
| 702 | wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", |
| 703 | len, gro_res_str[rc]); |
| 704 | } |
Vladimir Kondratiev | 5852742 | 2016-03-01 19:18:07 +0200 | [diff] [blame] | 705 | stats: |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 706 | /* statistics. rc set to GRO_NORMAL for AP bridging */ |
Vladimir Kondratiev | b5998e6 | 2014-03-17 15:34:22 +0200 | [diff] [blame] | 707 | if (unlikely(rc == GRO_DROP)) { |
| 708 | ndev->stats.rx_dropped++; |
| 709 | stats->rx_dropped++; |
| 710 | wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); |
| 711 | } else { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 712 | ndev->stats.rx_packets++; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 713 | stats->rx_packets++; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 714 | ndev->stats.rx_bytes += len; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 715 | stats->rx_bytes += len; |
Vladimir Kondratiev | c42da99 | 2015-03-08 15:42:02 +0200 | [diff] [blame] | 716 | if (mcast) |
| 717 | ndev->stats.multicast++; |
Vladimir Kondratiev | 194b482 | 2014-06-16 19:37:14 +0300 | [diff] [blame] | 718 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 719 | } |
| 720 | |
| 721 | /** |
| 722 | * Proceed all completed skb's from Rx VRING |
| 723 | * |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 724 | * Safe to call from NAPI poll, i.e. softirq with interrupts enabled |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 725 | */ |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 726 | void wil_rx_handle(struct wil6210_priv *wil, int *quota) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 727 | { |
| 728 | struct net_device *ndev = wil_to_ndev(wil); |
| 729 | struct vring *v = &wil->vring_rx; |
| 730 | struct sk_buff *skb; |
| 731 | |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 732 | if (unlikely(!v->va)) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 733 | wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); |
| 734 | return; |
| 735 | } |
Vladimir Kondratiev | 7743882 | 2013-01-28 18:31:06 +0200 | [diff] [blame] | 736 | wil_dbg_txrx(wil, "%s()\n", __func__); |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 737 | while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { |
| 738 | (*quota)--; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 739 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 740 | if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { |
| 741 | skb->dev = ndev; |
| 742 | skb_reset_mac_header(skb); |
| 743 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 744 | skb->pkt_type = PACKET_OTHERHOST; |
| 745 | skb->protocol = htons(ETH_P_802_2); |
Vladimir Kondratiev | b4490f4 | 2014-02-27 16:20:44 +0200 | [diff] [blame] | 746 | wil_netif_rx_any(skb, ndev); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 747 | } else { |
Vladimir Kondratiev | e4373d8 | 2014-12-23 09:47:21 +0200 | [diff] [blame] | 748 | wil_rx_reorder(wil, skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 749 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 750 | } |
| 751 | wil_rx_refill(wil, v->size); |
| 752 | } |
| 753 | |
Vladimir Kondratiev | d3762b4 | 2014-12-01 15:35:02 +0200 | [diff] [blame] | 754 | int wil_rx_init(struct wil6210_priv *wil, u16 size) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 755 | { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 756 | struct vring *vring = &wil->vring_rx; |
| 757 | int rc; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 758 | |
Vladimir Kondratiev | 9cf10d6 | 2014-09-10 16:34:36 +0300 | [diff] [blame] | 759 | wil_dbg_misc(wil, "%s()\n", __func__); |
| 760 | |
Vladimir Kondratiev | 8bf6adb | 2014-03-17 15:34:17 +0200 | [diff] [blame] | 761 | if (vring->va) { |
| 762 | wil_err(wil, "Rx ring already allocated\n"); |
| 763 | return -EINVAL; |
| 764 | } |
| 765 | |
Vladimir Kondratiev | d3762b4 | 2014-12-01 15:35:02 +0200 | [diff] [blame] | 766 | vring->size = size; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 767 | rc = wil_vring_alloc(wil, vring); |
| 768 | if (rc) |
| 769 | return rc; |
| 770 | |
Vladimir Kondratiev | 47e19af | 2013-01-28 18:30:59 +0200 | [diff] [blame] | 771 | rc = wmi_rx_chain_add(wil, vring); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 772 | if (rc) |
| 773 | goto err_free; |
| 774 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 775 | rc = wil_rx_refill(wil, vring->size); |
| 776 | if (rc) |
| 777 | goto err_free; |
| 778 | |
| 779 | return 0; |
| 780 | err_free: |
| 781 | wil_vring_free(wil, vring, 0); |
| 782 | |
| 783 | return rc; |
| 784 | } |
| 785 | |
| 786 | void wil_rx_fini(struct wil6210_priv *wil) |
| 787 | { |
| 788 | struct vring *vring = &wil->vring_rx; |
| 789 | |
Vladimir Kondratiev | 9cf10d6 | 2014-09-10 16:34:36 +0300 | [diff] [blame] | 790 | wil_dbg_misc(wil, "%s()\n", __func__); |
| 791 | |
Vladimir Kondratiev | 2acb422 | 2013-01-28 18:31:08 +0200 | [diff] [blame] | 792 | if (vring->va) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 793 | wil_vring_free(wil, vring, 0); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 794 | } |
| 795 | |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 796 | static inline void wil_tx_data_init(struct vring_tx_data *txdata) |
| 797 | { |
| 798 | spin_lock_bh(&txdata->lock); |
| 799 | txdata->dot1x_open = 0; |
| 800 | txdata->enabled = 0; |
| 801 | txdata->idle = 0; |
| 802 | txdata->last_idle = 0; |
| 803 | txdata->begin = 0; |
| 804 | txdata->agg_wsize = 0; |
| 805 | txdata->agg_timeout = 0; |
| 806 | txdata->agg_amsdu = 0; |
| 807 | txdata->addba_in_progress = false; |
| 808 | spin_unlock_bh(&txdata->lock); |
| 809 | } |
| 810 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 811 | int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, |
| 812 | int cid, int tid) |
| 813 | { |
| 814 | int rc; |
| 815 | struct wmi_vring_cfg_cmd cmd = { |
| 816 | .action = cpu_to_le32(WMI_VRING_CMD_ADD), |
| 817 | .vring_cfg = { |
| 818 | .tx_sw_ring = { |
Vladimir Kondratiev | 9a06bec | 2014-10-28 16:51:27 +0200 | [diff] [blame] | 819 | .max_mpdu_size = |
Vladimir Kondratiev | c44690a | 2014-12-23 09:47:11 +0200 | [diff] [blame] | 820 | cpu_to_le16(wil_mtu2macbuf(mtu_max)), |
Vladimir Kondratiev | b5d98e9 | 2013-04-18 14:33:51 +0300 | [diff] [blame] | 821 | .ring_size = cpu_to_le16(size), |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 822 | }, |
| 823 | .ringid = id, |
Vladimir Kondratiev | a70abea | 2014-03-17 15:34:05 +0200 | [diff] [blame] | 824 | .cidxtid = mk_cidxtid(cid, tid), |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 825 | .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, |
| 826 | .mac_ctrl = 0, |
| 827 | .to_resolution = 0, |
Vladimir Kondratiev | 3277213 | 2014-12-23 09:47:03 +0200 | [diff] [blame] | 828 | .agg_max_wsize = 0, |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 829 | .schd_params = { |
| 830 | .priority = cpu_to_le16(0), |
| 831 | .timeslot_us = cpu_to_le16(0xfff), |
| 832 | }, |
| 833 | }, |
| 834 | }; |
| 835 | struct { |
Lior David | b874dde | 2016-03-01 19:18:09 +0200 | [diff] [blame] | 836 | struct wmi_cmd_hdr wmi; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 837 | struct wmi_vring_cfg_done_event cmd; |
| 838 | } __packed reply; |
| 839 | struct vring *vring = &wil->vring_tx[id]; |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 840 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 841 | |
Vladimir Kondratiev | e0106ad | 2014-09-10 16:34:45 +0300 | [diff] [blame] | 842 | wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, |
| 843 | cmd.vring_cfg.tx_sw_ring.max_mpdu_size); |
Vladimir Kondratiev | 9b1ba7b | 2015-11-06 12:50:44 +0200 | [diff] [blame] | 844 | lockdep_assert_held(&wil->mutex); |
Vladimir Kondratiev | 9cf10d6 | 2014-09-10 16:34:36 +0300 | [diff] [blame] | 845 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 846 | if (vring->va) { |
| 847 | wil_err(wil, "Tx ring [%d] already allocated\n", id); |
| 848 | rc = -EINVAL; |
| 849 | goto out; |
| 850 | } |
| 851 | |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 852 | wil_tx_data_init(txdata); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 853 | vring->size = size; |
| 854 | rc = wil_vring_alloc(wil, vring); |
| 855 | if (rc) |
| 856 | goto out; |
| 857 | |
Vladimir Kondratiev | 93ae6d4 | 2014-02-27 16:20:51 +0200 | [diff] [blame] | 858 | wil->vring2cid_tid[id][0] = cid; |
| 859 | wil->vring2cid_tid[id][1] = tid; |
| 860 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 861 | cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 862 | |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 863 | if (!wil->privacy) |
| 864 | txdata->dot1x_open = true; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 865 | rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), |
| 866 | WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); |
| 867 | if (rc) |
| 868 | goto out_free; |
| 869 | |
Vladimir Kondratiev | b802317 | 2013-03-13 14:12:50 +0200 | [diff] [blame] | 870 | if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 871 | wil_err(wil, "Tx config failed, status 0x%02x\n", |
| 872 | reply.cmd.status); |
Vladimir Kondratiev | c331997 | 2013-01-28 18:31:09 +0200 | [diff] [blame] | 873 | rc = -EINVAL; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 874 | goto out_free; |
| 875 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 876 | |
Maya Erez | dc90506 | 2016-08-18 16:52:15 +0300 | [diff] [blame^] | 877 | spin_lock_bh(&txdata->lock); |
| 878 | vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 879 | txdata->enabled = 1; |
Maya Erez | dc90506 | 2016-08-18 16:52:15 +0300 | [diff] [blame^] | 880 | spin_unlock_bh(&txdata->lock); |
| 881 | |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 882 | if (txdata->dot1x_open && (agg_wsize >= 0)) |
Vladimir Kondratiev | 3a3def8 | 2014-12-23 09:47:05 +0200 | [diff] [blame] | 883 | wil_addba_tx_request(wil, id, agg_wsize); |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 884 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 885 | return 0; |
| 886 | out_free: |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 887 | spin_lock_bh(&txdata->lock); |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 888 | txdata->dot1x_open = false; |
| 889 | txdata->enabled = 0; |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 890 | spin_unlock_bh(&txdata->lock); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 891 | wil_vring_free(wil, vring, 1); |
Maya Erez | 0916d9f | 2016-01-17 12:39:10 +0200 | [diff] [blame] | 892 | wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; |
| 893 | wil->vring2cid_tid[id][1] = 0; |
| 894 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 895 | out: |
| 896 | |
| 897 | return rc; |
| 898 | } |
| 899 | |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 900 | int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) |
| 901 | { |
| 902 | int rc; |
| 903 | struct wmi_bcast_vring_cfg_cmd cmd = { |
| 904 | .action = cpu_to_le32(WMI_VRING_CMD_ADD), |
| 905 | .vring_cfg = { |
| 906 | .tx_sw_ring = { |
| 907 | .max_mpdu_size = |
| 908 | cpu_to_le16(wil_mtu2macbuf(mtu_max)), |
| 909 | .ring_size = cpu_to_le16(size), |
| 910 | }, |
| 911 | .ringid = id, |
| 912 | .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, |
| 913 | }, |
| 914 | }; |
| 915 | struct { |
Lior David | b874dde | 2016-03-01 19:18:09 +0200 | [diff] [blame] | 916 | struct wmi_cmd_hdr wmi; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 917 | struct wmi_vring_cfg_done_event cmd; |
| 918 | } __packed reply; |
| 919 | struct vring *vring = &wil->vring_tx[id]; |
| 920 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
| 921 | |
| 922 | wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, |
| 923 | cmd.vring_cfg.tx_sw_ring.max_mpdu_size); |
Vladimir Kondratiev | 9b1ba7b | 2015-11-06 12:50:44 +0200 | [diff] [blame] | 924 | lockdep_assert_held(&wil->mutex); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 925 | |
| 926 | if (vring->va) { |
| 927 | wil_err(wil, "Tx ring [%d] already allocated\n", id); |
| 928 | rc = -EINVAL; |
| 929 | goto out; |
| 930 | } |
| 931 | |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 932 | wil_tx_data_init(txdata); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 933 | vring->size = size; |
| 934 | rc = wil_vring_alloc(wil, vring); |
| 935 | if (rc) |
| 936 | goto out; |
| 937 | |
| 938 | wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ |
| 939 | wil->vring2cid_tid[id][1] = 0; /* TID */ |
| 940 | |
| 941 | cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); |
| 942 | |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 943 | if (!wil->privacy) |
| 944 | txdata->dot1x_open = true; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 945 | rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), |
| 946 | WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); |
| 947 | if (rc) |
| 948 | goto out_free; |
| 949 | |
| 950 | if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { |
| 951 | wil_err(wil, "Tx config failed, status 0x%02x\n", |
| 952 | reply.cmd.status); |
| 953 | rc = -EINVAL; |
| 954 | goto out_free; |
| 955 | } |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 956 | |
Maya Erez | dc90506 | 2016-08-18 16:52:15 +0300 | [diff] [blame^] | 957 | spin_lock_bh(&txdata->lock); |
| 958 | vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 959 | txdata->enabled = 1; |
Maya Erez | dc90506 | 2016-08-18 16:52:15 +0300 | [diff] [blame^] | 960 | spin_unlock_bh(&txdata->lock); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 961 | |
| 962 | return 0; |
| 963 | out_free: |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 964 | spin_lock_bh(&txdata->lock); |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 965 | txdata->enabled = 0; |
| 966 | txdata->dot1x_open = false; |
Maya Erez | 875e943 | 2016-01-28 19:24:02 +0200 | [diff] [blame] | 967 | spin_unlock_bh(&txdata->lock); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 968 | wil_vring_free(wil, vring, 1); |
| 969 | out: |
| 970 | |
| 971 | return rc; |
| 972 | } |
| 973 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 974 | void wil_vring_fini_tx(struct wil6210_priv *wil, int id) |
| 975 | { |
| 976 | struct vring *vring = &wil->vring_tx[id]; |
Vladimir Kondratiev | 3a124ed | 2014-12-23 09:47:04 +0200 | [diff] [blame] | 977 | struct vring_tx_data *txdata = &wil->vring_tx_data[id]; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 978 | |
Vladimir Kondratiev | 9b1ba7b | 2015-11-06 12:50:44 +0200 | [diff] [blame] | 979 | lockdep_assert_held(&wil->mutex); |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 980 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 981 | if (!vring->va) |
| 982 | return; |
| 983 | |
Vladimir Kondratiev | 9cf10d6 | 2014-09-10 16:34:36 +0300 | [diff] [blame] | 984 | wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); |
| 985 | |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 986 | spin_lock_bh(&txdata->lock); |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 987 | txdata->dot1x_open = false; |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 988 | txdata->enabled = 0; /* no Tx can be in progress or start anew */ |
| 989 | spin_unlock_bh(&txdata->lock); |
Maya Erez | 34b8886 | 2016-05-16 22:23:32 +0300 | [diff] [blame] | 990 | /* napi_synchronize waits for completion of the current NAPI but will |
| 991 | * not prevent the next NAPI run. |
| 992 | * Add a memory barrier to guarantee that txdata->enabled is zeroed |
| 993 | * before napi_synchronize so that the next scheduled NAPI will not |
| 994 | * handle this vring |
| 995 | */ |
| 996 | wmb(); |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 997 | /* make sure NAPI won't touch this vring */ |
Vladimir Kondratiev | 9419b6a | 2014-12-23 09:47:14 +0200 | [diff] [blame] | 998 | if (test_bit(wil_status_napi_en, wil->status)) |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 999 | napi_synchronize(&wil->napi_tx); |
| 1000 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1001 | wil_vring_free(wil, vring, 1); |
| 1002 | } |
| 1003 | |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1004 | static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1005 | struct sk_buff *skb) |
| 1006 | { |
Vladimir Kondratiev | 3df2cd36 | 2014-02-27 16:20:43 +0200 | [diff] [blame] | 1007 | int i; |
| 1008 | struct ethhdr *eth = (void *)skb->data; |
| 1009 | int cid = wil_find_cid(wil, eth->h_dest); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1010 | |
Vladimir Kondratiev | 3df2cd36 | 2014-02-27 16:20:43 +0200 | [diff] [blame] | 1011 | if (cid < 0) |
| 1012 | return NULL; |
| 1013 | |
| 1014 | /* TODO: fix for multiple TID */ |
| 1015 | for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1016 | if (!wil->vring_tx_data[i].dot1x_open && |
| 1017 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) |
| 1018 | continue; |
Vladimir Kondratiev | 3df2cd36 | 2014-02-27 16:20:43 +0200 | [diff] [blame] | 1019 | if (wil->vring2cid_tid[i][0] == cid) { |
| 1020 | struct vring *v = &wil->vring_tx[i]; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1021 | struct vring_tx_data *txdata = &wil->vring_tx_data[i]; |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1022 | |
Vladimir Kondratiev | 3df2cd36 | 2014-02-27 16:20:43 +0200 | [diff] [blame] | 1023 | wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", |
| 1024 | __func__, eth->h_dest, i); |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1025 | if (v->va && txdata->enabled) { |
Vladimir Kondratiev | 3df2cd36 | 2014-02-27 16:20:43 +0200 | [diff] [blame] | 1026 | return v; |
| 1027 | } else { |
| 1028 | wil_dbg_txrx(wil, "vring[%d] not valid\n", i); |
| 1029 | return NULL; |
| 1030 | } |
| 1031 | } |
| 1032 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1033 | |
| 1034 | return NULL; |
| 1035 | } |
| 1036 | |
Vladimir Kondratiev | fb3cac5 | 2014-02-27 16:20:46 +0200 | [diff] [blame] | 1037 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
| 1038 | struct sk_buff *skb); |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1039 | |
| 1040 | static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, |
| 1041 | struct sk_buff *skb) |
| 1042 | { |
| 1043 | struct vring *v; |
| 1044 | int i; |
| 1045 | u8 cid; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1046 | struct vring_tx_data *txdata; |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1047 | |
| 1048 | /* In the STA mode, it is expected to have only 1 VRING |
| 1049 | * for the AP we connected to. |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1050 | * find 1-st vring eligible for this skb and use it. |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1051 | */ |
| 1052 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { |
| 1053 | v = &wil->vring_tx[i]; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1054 | txdata = &wil->vring_tx_data[i]; |
| 1055 | if (!v->va || !txdata->enabled) |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1056 | continue; |
| 1057 | |
| 1058 | cid = wil->vring2cid_tid[i][0]; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1059 | if (cid >= WIL6210_MAX_CID) /* skip BCAST */ |
| 1060 | continue; |
| 1061 | |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1062 | if (!wil->vring_tx_data[i].dot1x_open && |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1063 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1064 | continue; |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1065 | |
| 1066 | wil_dbg_txrx(wil, "Tx -> ring %d\n", i); |
| 1067 | |
| 1068 | return v; |
| 1069 | } |
| 1070 | |
| 1071 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); |
| 1072 | |
| 1073 | return NULL; |
| 1074 | } |
| 1075 | |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1076 | /* Use one of 2 strategies: |
| 1077 | * |
| 1078 | * 1. New (real broadcast): |
| 1079 | * use dedicated broadcast vring |
| 1080 | * 2. Old (pseudo-DMS): |
| 1081 | * Find 1-st vring and return it; |
| 1082 | * duplicate skb and send it to other active vrings; |
| 1083 | * in all cases override dest address to unicast peer's address |
| 1084 | * Use old strategy when new is not supported yet: |
| 1085 | * - for PBSS |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1086 | */ |
| 1087 | static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, |
| 1088 | struct sk_buff *skb) |
Vladimir Kondratiev | fb3cac5 | 2014-02-27 16:20:46 +0200 | [diff] [blame] | 1089 | { |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1090 | struct vring *v; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1091 | struct vring_tx_data *txdata; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1092 | int i = wil->bcast_vring; |
Vladimir Kondratiev | fb3cac5 | 2014-02-27 16:20:46 +0200 | [diff] [blame] | 1093 | |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1094 | if (i < 0) |
| 1095 | return NULL; |
| 1096 | v = &wil->vring_tx[i]; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1097 | txdata = &wil->vring_tx_data[i]; |
| 1098 | if (!v->va || !txdata->enabled) |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1099 | return NULL; |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1100 | if (!wil->vring_tx_data[i].dot1x_open && |
| 1101 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) |
| 1102 | return NULL; |
Vladimir Kondratiev | fb3cac5 | 2014-02-27 16:20:46 +0200 | [diff] [blame] | 1103 | |
| 1104 | return v; |
| 1105 | } |
| 1106 | |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1107 | static void wil_set_da_for_vring(struct wil6210_priv *wil, |
| 1108 | struct sk_buff *skb, int vring_index) |
| 1109 | { |
| 1110 | struct ethhdr *eth = (void *)skb->data; |
| 1111 | int cid = wil->vring2cid_tid[vring_index][0]; |
| 1112 | |
| 1113 | ether_addr_copy(eth->h_dest, wil->sta[cid].addr); |
| 1114 | } |
| 1115 | |
| 1116 | static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, |
| 1117 | struct sk_buff *skb) |
| 1118 | { |
| 1119 | struct vring *v, *v2; |
| 1120 | struct sk_buff *skb2; |
| 1121 | int i; |
| 1122 | u8 cid; |
| 1123 | struct ethhdr *eth = (void *)skb->data; |
| 1124 | char *src = eth->h_source; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1125 | struct vring_tx_data *txdata; |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1126 | |
| 1127 | /* find 1-st vring eligible for data */ |
| 1128 | for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { |
| 1129 | v = &wil->vring_tx[i]; |
Maya Erez | b729aaf | 2016-01-17 12:39:09 +0200 | [diff] [blame] | 1130 | txdata = &wil->vring_tx_data[i]; |
| 1131 | if (!v->va || !txdata->enabled) |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1132 | continue; |
| 1133 | |
| 1134 | cid = wil->vring2cid_tid[i][0]; |
| 1135 | if (cid >= WIL6210_MAX_CID) /* skip BCAST */ |
| 1136 | continue; |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1137 | if (!wil->vring_tx_data[i].dot1x_open && |
| 1138 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1139 | continue; |
| 1140 | |
| 1141 | /* don't Tx back to source when re-routing Rx->Tx at the AP */ |
| 1142 | if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) |
| 1143 | continue; |
| 1144 | |
| 1145 | goto found; |
| 1146 | } |
| 1147 | |
| 1148 | wil_dbg_txrx(wil, "Tx while no vrings active?\n"); |
| 1149 | |
| 1150 | return NULL; |
| 1151 | |
| 1152 | found: |
| 1153 | wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); |
| 1154 | wil_set_da_for_vring(wil, skb, i); |
| 1155 | |
| 1156 | /* find other active vrings and duplicate skb for each */ |
| 1157 | for (i++; i < WIL6210_MAX_TX_RINGS; i++) { |
| 1158 | v2 = &wil->vring_tx[i]; |
| 1159 | if (!v2->va) |
| 1160 | continue; |
| 1161 | cid = wil->vring2cid_tid[i][0]; |
| 1162 | if (cid >= WIL6210_MAX_CID) /* skip BCAST */ |
| 1163 | continue; |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1164 | if (!wil->vring_tx_data[i].dot1x_open && |
| 1165 | (skb->protocol != cpu_to_be16(ETH_P_PAE))) |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1166 | continue; |
| 1167 | |
| 1168 | if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) |
| 1169 | continue; |
| 1170 | |
| 1171 | skb2 = skb_copy(skb, GFP_ATOMIC); |
| 1172 | if (skb2) { |
| 1173 | wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); |
| 1174 | wil_set_da_for_vring(wil, skb2, i); |
| 1175 | wil_tx_vring(wil, v2, skb2); |
| 1176 | } else { |
| 1177 | wil_err(wil, "skb_copy failed\n"); |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | return v; |
| 1182 | } |
| 1183 | |
| 1184 | static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, |
| 1185 | struct sk_buff *skb) |
| 1186 | { |
| 1187 | struct wireless_dev *wdev = wil->wdev; |
| 1188 | |
| 1189 | if (wdev->iftype != NL80211_IFTYPE_AP) |
| 1190 | return wil_find_tx_bcast_2(wil, skb); |
| 1191 | |
Vladimir Kondratiev | 7081242 | 2015-03-15 16:00:24 +0200 | [diff] [blame] | 1192 | return wil_find_tx_bcast_1(wil, skb); |
| 1193 | } |
| 1194 | |
Kirshenbaum Erez | 99b55bd | 2013-06-23 12:59:34 +0300 | [diff] [blame] | 1195 | static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, |
| 1196 | int vring_index) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1197 | { |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 1198 | wil_desc_addr_set(&d->dma.addr, pa); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1199 | d->dma.ip_length = 0; |
| 1200 | /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ |
| 1201 | d->dma.b11 = 0/*14 | BIT(7)*/; |
| 1202 | d->dma.error = 0; |
| 1203 | d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 1204 | d->dma.length = cpu_to_le16((u16)len); |
Kirshenbaum Erez | 99b55bd | 2013-06-23 12:59:34 +0300 | [diff] [blame] | 1205 | d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1206 | d->mac.d[0] = 0; |
| 1207 | d->mac.d[1] = 0; |
| 1208 | d->mac.d[2] = 0; |
| 1209 | d->mac.ucode_cmd = 0; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1210 | /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ |
| 1211 | d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | |
| 1212 | (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); |
| 1213 | |
| 1214 | return 0; |
| 1215 | } |
| 1216 | |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1217 | static inline |
| 1218 | void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) |
| 1219 | { |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1220 | d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1221 | } |
| 1222 | |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1223 | /** |
| 1224 | * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding |
| 1225 | * @skb is used to obtain the protocol and headers length. |
| 1226 | * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, |
| 1227 | * 2 - middle, 3 - last descriptor. |
| 1228 | */ |
| 1229 | |
| 1230 | static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, |
| 1231 | struct sk_buff *skb, |
| 1232 | int tso_desc_type, bool is_ipv4, |
| 1233 | int tcp_hdr_len, int skb_net_hdr_len) |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1234 | { |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1235 | d->dma.b11 = ETH_HLEN; /* MAC header length */ |
| 1236 | d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; |
| 1237 | |
| 1238 | d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); |
| 1239 | /* L4 header len: TCP header length */ |
| 1240 | d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); |
| 1241 | |
| 1242 | /* Setup TSO: bit and desc type */ |
| 1243 | d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | |
| 1244 | (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); |
| 1245 | d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); |
| 1246 | |
| 1247 | d->dma.ip_length = skb_net_hdr_len; |
| 1248 | /* Enable TCP/UDP checksum */ |
| 1249 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); |
| 1250 | /* Calculate pseudo-header */ |
| 1251 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); |
| 1252 | } |
| 1253 | |
| 1254 | /** |
| 1255 | * Sets the descriptor @d up for csum. The corresponding |
| 1256 | * @skb is used to obtain the protocol and headers length. |
| 1257 | * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. |
| 1258 | * Note, if d==NULL, the function only returns the protocol result. |
| 1259 | * |
| 1260 | * It is very similar to previous wil_tx_desc_offload_setup_tso. This |
| 1261 | * is "if unrolling" to optimize the critical path. |
| 1262 | */ |
| 1263 | |
| 1264 | static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, |
| 1265 | struct sk_buff *skb){ |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1266 | int protocol; |
| 1267 | |
| 1268 | if (skb->ip_summed != CHECKSUM_PARTIAL) |
| 1269 | return 0; |
| 1270 | |
Vladimir Kondratiev | df2d08e | 2014-01-08 11:50:48 +0200 | [diff] [blame] | 1271 | d->dma.b11 = ETH_HLEN; /* MAC header length */ |
| 1272 | |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1273 | switch (skb->protocol) { |
| 1274 | case cpu_to_be16(ETH_P_IP): |
| 1275 | protocol = ip_hdr(skb)->protocol; |
Vladimir Kondratiev | df2d08e | 2014-01-08 11:50:48 +0200 | [diff] [blame] | 1276 | d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1277 | break; |
| 1278 | case cpu_to_be16(ETH_P_IPV6): |
| 1279 | protocol = ipv6_hdr(skb)->nexthdr; |
| 1280 | break; |
| 1281 | default: |
| 1282 | return -EINVAL; |
| 1283 | } |
| 1284 | |
| 1285 | switch (protocol) { |
| 1286 | case IPPROTO_TCP: |
| 1287 | d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); |
| 1288 | /* L4 header len: TCP header length */ |
| 1289 | d->dma.d0 |= |
| 1290 | (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); |
| 1291 | break; |
| 1292 | case IPPROTO_UDP: |
| 1293 | /* L4 header len: UDP header length */ |
| 1294 | d->dma.d0 |= |
| 1295 | (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); |
| 1296 | break; |
| 1297 | default: |
| 1298 | return -EINVAL; |
| 1299 | } |
| 1300 | |
| 1301 | d->dma.ip_length = skb_network_header_len(skb); |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1302 | /* Enable TCP/UDP checksum */ |
| 1303 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); |
| 1304 | /* Calculate pseudo-header */ |
| 1305 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); |
| 1306 | |
| 1307 | return 0; |
| 1308 | } |
| 1309 | |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1310 | static inline void wil_tx_last_desc(struct vring_tx_desc *d) |
| 1311 | { |
| 1312 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | |
| 1313 | BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | |
| 1314 | BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); |
| 1315 | } |
| 1316 | |
| 1317 | static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) |
| 1318 | { |
| 1319 | d->dma.d0 |= wil_tso_type_lst << |
| 1320 | DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; |
| 1321 | } |
| 1322 | |
| 1323 | static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, |
| 1324 | struct sk_buff *skb) |
| 1325 | { |
| 1326 | struct device *dev = wil_to_dev(wil); |
| 1327 | |
| 1328 | /* point to descriptors in shared memory */ |
| 1329 | volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, |
| 1330 | *_first_desc = NULL; |
| 1331 | |
| 1332 | /* pointers to shadow descriptors */ |
| 1333 | struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, |
| 1334 | *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, |
| 1335 | *first_desc = &first_desc_mem; |
| 1336 | |
| 1337 | /* pointer to shadow descriptors' context */ |
| 1338 | struct wil_ctx *hdr_ctx, *first_ctx = NULL; |
| 1339 | |
| 1340 | int descs_used = 0; /* total number of used descriptors */ |
| 1341 | int sg_desc_cnt = 0; /* number of descriptors for current mss*/ |
| 1342 | |
| 1343 | u32 swhead = vring->swhead; |
| 1344 | int used, avail = wil_vring_avail_tx(vring); |
| 1345 | int nr_frags = skb_shinfo(skb)->nr_frags; |
| 1346 | int min_desc_required = nr_frags + 1; |
| 1347 | int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ |
| 1348 | int f, len, hdrlen, headlen; |
| 1349 | int vring_index = vring - wil->vring_tx; |
| 1350 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; |
| 1351 | uint i = swhead; |
| 1352 | dma_addr_t pa; |
| 1353 | const skb_frag_t *frag = NULL; |
| 1354 | int rem_data = mss; |
| 1355 | int lenmss; |
| 1356 | int hdr_compensation_need = true; |
| 1357 | int desc_tso_type = wil_tso_type_first; |
| 1358 | bool is_ipv4; |
| 1359 | int tcp_hdr_len; |
| 1360 | int skb_net_hdr_len; |
| 1361 | int gso_type; |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1362 | int rc = -EINVAL; |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1363 | |
| 1364 | wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", |
| 1365 | __func__, skb->len, vring_index); |
| 1366 | |
| 1367 | if (unlikely(!txdata->enabled)) |
| 1368 | return -EINVAL; |
| 1369 | |
| 1370 | /* A typical page 4K is 3-4 payloads, we assume each fragment |
| 1371 | * is a full payload, that's how min_desc_required has been |
| 1372 | * calculated. In real we might need more or less descriptors, |
| 1373 | * this is the initial check only. |
| 1374 | */ |
| 1375 | if (unlikely(avail < min_desc_required)) { |
| 1376 | wil_err_ratelimited(wil, |
| 1377 | "TSO: Tx ring[%2d] full. No space for %d fragments\n", |
| 1378 | vring_index, min_desc_required); |
| 1379 | return -ENOMEM; |
| 1380 | } |
| 1381 | |
| 1382 | /* Header Length = MAC header len + IP header len + TCP header len*/ |
| 1383 | hdrlen = ETH_HLEN + |
| 1384 | (int)skb_network_header_len(skb) + |
| 1385 | tcp_hdrlen(skb); |
| 1386 | |
| 1387 | gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); |
| 1388 | switch (gso_type) { |
| 1389 | case SKB_GSO_TCPV4: |
| 1390 | /* TCP v4, zero out the IP length and IPv4 checksum fields |
| 1391 | * as required by the offloading doc |
| 1392 | */ |
| 1393 | ip_hdr(skb)->tot_len = 0; |
| 1394 | ip_hdr(skb)->check = 0; |
| 1395 | is_ipv4 = true; |
| 1396 | break; |
| 1397 | case SKB_GSO_TCPV6: |
| 1398 | /* TCP v6, zero out the payload length */ |
| 1399 | ipv6_hdr(skb)->payload_len = 0; |
| 1400 | is_ipv4 = false; |
| 1401 | break; |
| 1402 | default: |
| 1403 | /* other than TCPv4 or TCPv6 types are not supported for TSO. |
| 1404 | * It is also illegal for both to be set simultaneously |
| 1405 | */ |
| 1406 | return -EINVAL; |
| 1407 | } |
| 1408 | |
| 1409 | if (skb->ip_summed != CHECKSUM_PARTIAL) |
| 1410 | return -EINVAL; |
| 1411 | |
| 1412 | /* tcp header length and skb network header length are fixed for all |
| 1413 | * packet's descriptors - read then once here |
| 1414 | */ |
| 1415 | tcp_hdr_len = tcp_hdrlen(skb); |
| 1416 | skb_net_hdr_len = skb_network_header_len(skb); |
| 1417 | |
| 1418 | _hdr_desc = &vring->va[i].tx; |
| 1419 | |
| 1420 | pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); |
| 1421 | if (unlikely(dma_mapping_error(dev, pa))) { |
| 1422 | wil_err(wil, "TSO: Skb head DMA map error\n"); |
| 1423 | goto err_exit; |
| 1424 | } |
| 1425 | |
| 1426 | wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); |
| 1427 | wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, |
| 1428 | tcp_hdr_len, skb_net_hdr_len); |
| 1429 | wil_tx_last_desc(hdr_desc); |
| 1430 | |
| 1431 | vring->ctx[i].mapped_as = wil_mapped_as_single; |
| 1432 | hdr_ctx = &vring->ctx[i]; |
| 1433 | |
| 1434 | descs_used++; |
| 1435 | headlen = skb_headlen(skb) - hdrlen; |
| 1436 | |
| 1437 | for (f = headlen ? -1 : 0; f < nr_frags; f++) { |
| 1438 | if (headlen) { |
| 1439 | len = headlen; |
| 1440 | wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", |
| 1441 | len); |
| 1442 | } else { |
| 1443 | frag = &skb_shinfo(skb)->frags[f]; |
| 1444 | len = frag->size; |
| 1445 | wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); |
| 1446 | } |
| 1447 | |
| 1448 | while (len) { |
| 1449 | wil_dbg_txrx(wil, |
| 1450 | "TSO: len %d, rem_data %d, descs_used %d\n", |
| 1451 | len, rem_data, descs_used); |
| 1452 | |
| 1453 | if (descs_used == avail) { |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1454 | wil_err_ratelimited(wil, "TSO: ring overflow\n"); |
| 1455 | rc = -ENOMEM; |
| 1456 | goto mem_error; |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1457 | } |
| 1458 | |
| 1459 | lenmss = min_t(int, rem_data, len); |
| 1460 | i = (swhead + descs_used) % vring->size; |
| 1461 | wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); |
| 1462 | |
| 1463 | if (!headlen) { |
| 1464 | pa = skb_frag_dma_map(dev, frag, |
| 1465 | frag->size - len, lenmss, |
| 1466 | DMA_TO_DEVICE); |
| 1467 | vring->ctx[i].mapped_as = wil_mapped_as_page; |
| 1468 | } else { |
| 1469 | pa = dma_map_single(dev, |
| 1470 | skb->data + |
| 1471 | skb_headlen(skb) - headlen, |
| 1472 | lenmss, |
| 1473 | DMA_TO_DEVICE); |
| 1474 | vring->ctx[i].mapped_as = wil_mapped_as_single; |
| 1475 | headlen -= lenmss; |
| 1476 | } |
| 1477 | |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1478 | if (unlikely(dma_mapping_error(dev, pa))) { |
| 1479 | wil_err(wil, "TSO: DMA map page error\n"); |
| 1480 | goto mem_error; |
| 1481 | } |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1482 | |
| 1483 | _desc = &vring->va[i].tx; |
| 1484 | |
| 1485 | if (!_first_desc) { |
| 1486 | _first_desc = _desc; |
| 1487 | first_ctx = &vring->ctx[i]; |
| 1488 | d = first_desc; |
| 1489 | } else { |
| 1490 | d = &desc_mem; |
| 1491 | } |
| 1492 | |
| 1493 | wil_tx_desc_map(d, pa, lenmss, vring_index); |
| 1494 | wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, |
| 1495 | is_ipv4, tcp_hdr_len, |
| 1496 | skb_net_hdr_len); |
| 1497 | |
| 1498 | /* use tso_type_first only once */ |
| 1499 | desc_tso_type = wil_tso_type_mid; |
| 1500 | |
| 1501 | descs_used++; /* desc used so far */ |
| 1502 | sg_desc_cnt++; /* desc used for this segment */ |
| 1503 | len -= lenmss; |
| 1504 | rem_data -= lenmss; |
| 1505 | |
| 1506 | wil_dbg_txrx(wil, |
| 1507 | "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", |
| 1508 | len, rem_data, descs_used, sg_desc_cnt); |
| 1509 | |
| 1510 | /* Close the segment if reached mss size or last frag*/ |
| 1511 | if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { |
| 1512 | if (hdr_compensation_need) { |
| 1513 | /* first segment include hdr desc for |
| 1514 | * release |
| 1515 | */ |
| 1516 | hdr_ctx->nr_frags = sg_desc_cnt; |
| 1517 | wil_tx_desc_set_nr_frags(first_desc, |
| 1518 | sg_desc_cnt + |
| 1519 | 1); |
| 1520 | hdr_compensation_need = false; |
| 1521 | } else { |
| 1522 | wil_tx_desc_set_nr_frags(first_desc, |
| 1523 | sg_desc_cnt); |
| 1524 | } |
| 1525 | first_ctx->nr_frags = sg_desc_cnt - 1; |
| 1526 | |
| 1527 | wil_tx_last_desc(d); |
| 1528 | |
| 1529 | /* first descriptor may also be the last |
| 1530 | * for this mss - make sure not to copy |
| 1531 | * it twice |
| 1532 | */ |
| 1533 | if (first_desc != d) |
| 1534 | *_first_desc = *first_desc; |
| 1535 | |
| 1536 | /*last descriptor will be copied at the end |
| 1537 | * of this TS processing |
| 1538 | */ |
| 1539 | if (f < nr_frags - 1 || len > 0) |
| 1540 | *_desc = *d; |
| 1541 | |
| 1542 | rem_data = mss; |
| 1543 | _first_desc = NULL; |
| 1544 | sg_desc_cnt = 0; |
| 1545 | } else if (first_desc != d) /* update mid descriptor */ |
| 1546 | *_desc = *d; |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | /* first descriptor may also be the last. |
| 1551 | * in this case d pointer is invalid |
| 1552 | */ |
| 1553 | if (_first_desc == _desc) |
| 1554 | d = first_desc; |
| 1555 | |
| 1556 | /* Last data descriptor */ |
| 1557 | wil_set_tx_desc_last_tso(d); |
| 1558 | *_desc = *d; |
| 1559 | |
| 1560 | /* Fill the total number of descriptors in first desc (hdr)*/ |
| 1561 | wil_tx_desc_set_nr_frags(hdr_desc, descs_used); |
| 1562 | *_hdr_desc = *hdr_desc; |
| 1563 | |
| 1564 | /* hold reference to skb |
| 1565 | * to prevent skb release before accounting |
| 1566 | * in case of immediate "tx done" |
| 1567 | */ |
| 1568 | vring->ctx[i].skb = skb_get(skb); |
| 1569 | |
| 1570 | /* performance monitoring */ |
| 1571 | used = wil_vring_used_tx(vring); |
| 1572 | if (wil_val_in_range(vring_idle_trsh, |
| 1573 | used, used + descs_used)) { |
| 1574 | txdata->idle += get_cycles() - txdata->last_idle; |
| 1575 | wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", |
| 1576 | vring_index, used, used + descs_used); |
| 1577 | } |
| 1578 | |
Maya Erez | eb26cff | 2016-05-16 22:23:30 +0300 | [diff] [blame] | 1579 | /* Make sure to advance the head only after descriptor update is done. |
| 1580 | * This will prevent a race condition where the completion thread |
| 1581 | * will see the DU bit set from previous run and will handle the |
| 1582 | * skb before it was completed. |
| 1583 | */ |
| 1584 | wmb(); |
| 1585 | |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1586 | /* advance swhead */ |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1587 | wil_vring_advance_head(vring, descs_used); |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1588 | wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1589 | |
| 1590 | /* make sure all writes to descriptors (shared memory) are done before |
| 1591 | * committing them to HW |
| 1592 | */ |
| 1593 | wmb(); |
| 1594 | |
Vladimir Kondratiev | b9eeb51 | 2015-07-30 13:52:03 +0300 | [diff] [blame] | 1595 | wil_w(wil, vring->hwtail, vring->swhead); |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1596 | return 0; |
| 1597 | |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1598 | mem_error: |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1599 | while (descs_used > 0) { |
| 1600 | struct wil_ctx *ctx; |
| 1601 | |
Maya Erez | a1526f7 | 2016-05-16 22:23:33 +0300 | [diff] [blame] | 1602 | i = (swhead + descs_used - 1) % vring->size; |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1603 | d = (struct vring_tx_desc *)&vring->va[i].tx; |
| 1604 | _desc = &vring->va[i].tx; |
| 1605 | *d = *_desc; |
| 1606 | _desc->dma.status = TX_DMA_STATUS_DU; |
| 1607 | ctx = &vring->ctx[i]; |
| 1608 | wil_txdesc_unmap(dev, d, ctx); |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1609 | memset(ctx, 0, sizeof(*ctx)); |
| 1610 | descs_used--; |
| 1611 | } |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1612 | err_exit: |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1613 | return rc; |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1614 | } |
| 1615 | |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 1616 | static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
| 1617 | struct sk_buff *skb) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1618 | { |
| 1619 | struct device *dev = wil_to_dev(wil); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 1620 | struct vring_tx_desc dd, *d = ⅆ |
| 1621 | volatile struct vring_tx_desc *_d; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1622 | u32 swhead = vring->swhead; |
| 1623 | int avail = wil_vring_avail_tx(vring); |
| 1624 | int nr_frags = skb_shinfo(skb)->nr_frags; |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1625 | uint f = 0; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1626 | int vring_index = vring - wil->vring_tx; |
Vladimir Kondratiev | 7c0acf8 | 2014-06-16 19:37:05 +0300 | [diff] [blame] | 1627 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1628 | uint i = swhead; |
| 1629 | dma_addr_t pa; |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 1630 | int used; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1631 | bool mcast = (vring_index == wil->bcast_vring); |
| 1632 | uint len = skb_headlen(skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1633 | |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1634 | wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", |
| 1635 | __func__, skb->len, vring_index); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1636 | |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 1637 | if (unlikely(!txdata->enabled)) |
| 1638 | return -EINVAL; |
| 1639 | |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1640 | if (unlikely(avail < 1 + nr_frags)) { |
Vladimir Kondratiev | 70801e1 | 2014-12-01 15:36:03 +0200 | [diff] [blame] | 1641 | wil_err_ratelimited(wil, |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1642 | "Tx ring[%2d] full. No space for %d fragments\n", |
| 1643 | vring_index, 1 + nr_frags); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1644 | return -ENOMEM; |
| 1645 | } |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1646 | _d = &vring->va[i].tx; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1647 | |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1648 | pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1649 | |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1650 | wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, |
| 1651 | skb_headlen(skb), skb->data, &pa); |
Vladimir Kondratiev | 7743882 | 2013-01-28 18:31:06 +0200 | [diff] [blame] | 1652 | wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1653 | skb->data, skb_headlen(skb), false); |
| 1654 | |
| 1655 | if (unlikely(dma_mapping_error(dev, pa))) |
| 1656 | return -EINVAL; |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1657 | vring->ctx[i].mapped_as = wil_mapped_as_single; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1658 | /* 1-st segment */ |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1659 | wil_tx_desc_map(d, pa, len, vring_index); |
| 1660 | if (unlikely(mcast)) { |
| 1661 | d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ |
Vladimir Kondratiev | 230d844 | 2015-04-30 16:25:10 +0300 | [diff] [blame] | 1662 | if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1663 | d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1664 | } |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1665 | /* Process TCP/UDP checksum offloading */ |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1666 | if (unlikely(wil_tx_desc_offload_setup(d, skb))) { |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1667 | wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1668 | vring_index); |
| 1669 | goto dma_error; |
| 1670 | } |
| 1671 | |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1672 | vring->ctx[i].nr_frags = nr_frags; |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1673 | wil_tx_desc_set_nr_frags(d, nr_frags + 1); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 1674 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1675 | /* middle segments */ |
Kirshenbaum Erez | 504937d | 2013-07-21 11:34:37 +0300 | [diff] [blame] | 1676 | for (; f < nr_frags; f++) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1677 | const struct skb_frag_struct *frag = |
| 1678 | &skb_shinfo(skb)->frags[f]; |
| 1679 | int len = skb_frag_size(frag); |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1680 | |
Vladimir Kondratiev | e59d16c | 2015-02-01 10:55:12 +0200 | [diff] [blame] | 1681 | *_d = *d; |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1682 | wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); |
| 1683 | wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, |
| 1684 | (const void *)d, sizeof(*d), false); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1685 | i = (swhead + f + 1) % vring->size; |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1686 | _d = &vring->va[i].tx; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1687 | pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1688 | DMA_TO_DEVICE); |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1689 | if (unlikely(dma_mapping_error(dev, pa))) { |
| 1690 | wil_err(wil, "Tx[%2d] failed to map fragment\n", |
| 1691 | vring_index); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1692 | goto dma_error; |
Hamad Kadmany | e3d2ed9 | 2015-10-25 15:59:22 +0200 | [diff] [blame] | 1693 | } |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1694 | vring->ctx[i].mapped_as = wil_mapped_as_page; |
Kirshenbaum Erez | 99b55bd | 2013-06-23 12:59:34 +0300 | [diff] [blame] | 1695 | wil_tx_desc_map(d, pa, len, vring_index); |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1696 | /* no need to check return code - |
| 1697 | * if it succeeded for 1-st descriptor, |
| 1698 | * it will succeed here too |
| 1699 | */ |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1700 | wil_tx_desc_offload_setup(d, skb); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1701 | } |
| 1702 | /* for the last seg only */ |
| 1703 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); |
Kirshenbaum Erez | 668b2bb | 2013-06-23 12:59:35 +0300 | [diff] [blame] | 1704 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1705 | d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 1706 | *_d = *d; |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1707 | wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); |
| 1708 | wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, |
| 1709 | (const void *)d, sizeof(*d), false); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1710 | |
Vladimir Kondratiev | 6cdadd4 | 2013-07-11 18:03:41 +0300 | [diff] [blame] | 1711 | /* hold reference to skb |
| 1712 | * to prevent skb release before accounting |
| 1713 | * in case of immediate "tx done" |
| 1714 | */ |
| 1715 | vring->ctx[i].skb = skb_get(skb); |
| 1716 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 1717 | /* performance monitoring */ |
| 1718 | used = wil_vring_used_tx(vring); |
| 1719 | if (wil_val_in_range(vring_idle_trsh, |
| 1720 | used, used + nr_frags + 1)) { |
Vladimir Kondratiev | 7c0acf8 | 2014-06-16 19:37:05 +0300 | [diff] [blame] | 1721 | txdata->idle += get_cycles() - txdata->last_idle; |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 1722 | wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", |
| 1723 | vring_index, used, used + nr_frags + 1); |
| 1724 | } |
Vladimir Kondratiev | 7c0acf8 | 2014-06-16 19:37:05 +0300 | [diff] [blame] | 1725 | |
Maya Erez | eb26cff | 2016-05-16 22:23:30 +0300 | [diff] [blame] | 1726 | /* Make sure to advance the head only after descriptor update is done. |
| 1727 | * This will prevent a race condition where the completion thread |
| 1728 | * will see the DU bit set from previous run and will handle the |
| 1729 | * skb before it was completed. |
| 1730 | */ |
| 1731 | wmb(); |
| 1732 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1733 | /* advance swhead */ |
| 1734 | wil_vring_advance_head(vring, nr_frags + 1); |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1735 | wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, |
| 1736 | vring->swhead); |
Vladimir Kondratiev | 9865809 | 2013-05-12 14:43:35 +0300 | [diff] [blame] | 1737 | trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1738 | |
| 1739 | /* make sure all writes to descriptors (shared memory) are done before |
| 1740 | * committing them to HW |
| 1741 | */ |
| 1742 | wmb(); |
| 1743 | |
Vladimir Kondratiev | b9eeb51 | 2015-07-30 13:52:03 +0300 | [diff] [blame] | 1744 | wil_w(wil, vring->hwtail, vring->swhead); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1745 | |
| 1746 | return 0; |
| 1747 | dma_error: |
| 1748 | /* unmap what we have mapped */ |
Vladimir Kondratiev | c2a146f | 2013-07-21 11:34:36 +0300 | [diff] [blame] | 1749 | nr_frags = f + 1; /* frags mapped + one for skb head */ |
| 1750 | for (f = 0; f < nr_frags; f++) { |
Vladimir Kondratiev | c2a146f | 2013-07-21 11:34:36 +0300 | [diff] [blame] | 1751 | struct wil_ctx *ctx; |
Vladimir Kondratiev | 7e594444 | 2013-05-12 14:43:32 +0300 | [diff] [blame] | 1752 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1753 | i = (swhead + f) % vring->size; |
Vladimir Kondratiev | c2a146f | 2013-07-21 11:34:36 +0300 | [diff] [blame] | 1754 | ctx = &vring->ctx[i]; |
Vladimir Kondratiev | 8fe5962 | 2014-09-10 16:34:34 +0300 | [diff] [blame] | 1755 | _d = &vring->va[i].tx; |
Vladimir Kondratiev | 68ada71 | 2013-05-12 14:43:37 +0300 | [diff] [blame] | 1756 | *d = *_d; |
| 1757 | _d->dma.status = TX_DMA_STATUS_DU; |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1758 | wil_txdesc_unmap(dev, d, ctx); |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 1759 | |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 1760 | memset(ctx, 0, sizeof(*ctx)); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1761 | } |
| 1762 | |
| 1763 | return -EINVAL; |
| 1764 | } |
| 1765 | |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 1766 | static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, |
| 1767 | struct sk_buff *skb) |
| 1768 | { |
| 1769 | int vring_index = vring - wil->vring_tx; |
| 1770 | struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; |
| 1771 | int rc; |
| 1772 | |
| 1773 | spin_lock(&txdata->lock); |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1774 | |
| 1775 | rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) |
| 1776 | (wil, vring, skb); |
| 1777 | |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 1778 | spin_unlock(&txdata->lock); |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1779 | |
Vladimir Kondratiev | 5933a06 | 2015-02-01 10:55:13 +0200 | [diff] [blame] | 1780 | return rc; |
| 1781 | } |
| 1782 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1783 | netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 1784 | { |
| 1785 | struct wil6210_priv *wil = ndev_to_wil(ndev); |
Vladimir Kondratiev | 3df2cd36 | 2014-02-27 16:20:43 +0200 | [diff] [blame] | 1786 | struct ethhdr *eth = (void *)skb->data; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1787 | bool bcast = is_multicast_ether_addr(eth->h_dest); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1788 | struct vring *vring; |
Vladimir Kondratiev | aa27dea | 2014-03-17 15:34:11 +0200 | [diff] [blame] | 1789 | static bool pr_once_fw; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1790 | int rc; |
| 1791 | |
Vladimir Kondratiev | 7743882 | 2013-01-28 18:31:06 +0200 | [diff] [blame] | 1792 | wil_dbg_txrx(wil, "%s()\n", __func__); |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1793 | if (unlikely(!test_bit(wil_status_fwready, wil->status))) { |
Vladimir Kondratiev | aa27dea | 2014-03-17 15:34:11 +0200 | [diff] [blame] | 1794 | if (!pr_once_fw) { |
| 1795 | wil_err(wil, "FW not ready\n"); |
| 1796 | pr_once_fw = true; |
| 1797 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1798 | goto drop; |
| 1799 | } |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1800 | if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { |
Maya Erez | d8ed043 | 2016-04-26 14:41:39 +0300 | [diff] [blame] | 1801 | wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1802 | goto drop; |
| 1803 | } |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1804 | if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1805 | wil_err(wil, "Xmit in monitor mode not supported\n"); |
| 1806 | goto drop; |
| 1807 | } |
Vladimir Kondratiev | aa27dea | 2014-03-17 15:34:11 +0200 | [diff] [blame] | 1808 | pr_once_fw = false; |
Vladimir Kondratiev | d58db4e | 2013-06-09 09:12:54 +0300 | [diff] [blame] | 1809 | |
| 1810 | /* find vring */ |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1811 | if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { |
| 1812 | /* in STA mode (ESS), all to same VRING */ |
| 1813 | vring = wil_find_tx_vring_sta(wil, skb); |
| 1814 | } else { /* direct communication, find matching VRING */ |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1815 | vring = bcast ? wil_find_tx_bcast(wil, skb) : |
| 1816 | wil_find_tx_ucast(wil, skb); |
Vladimir Kondratiev | 54ed90a | 2014-12-23 09:47:15 +0200 | [diff] [blame] | 1817 | } |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1818 | if (unlikely(!vring)) { |
Vladimir Kondratiev | 5aed139 | 2014-06-16 19:37:15 +0300 | [diff] [blame] | 1819 | wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); |
Vladimir Kondratiev | d58db4e | 2013-06-09 09:12:54 +0300 | [diff] [blame] | 1820 | goto drop; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1821 | } |
Vladimir Kondratiev | d58db4e | 2013-06-09 09:12:54 +0300 | [diff] [blame] | 1822 | /* set up vring entry */ |
| 1823 | rc = wil_tx_vring(wil, vring, skb); |
| 1824 | |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1825 | /* do we still have enough room in the vring? */ |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1826 | if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1827 | netif_tx_stop_all_queues(wil_to_ndev(wil)); |
Vladimir Kondratiev | 55f8f68 | 2014-06-16 19:37:23 +0300 | [diff] [blame] | 1828 | wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); |
| 1829 | } |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1830 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1831 | switch (rc) { |
| 1832 | case 0: |
Vladimir Kondratiev | 795ce73 | 2013-01-28 18:31:00 +0200 | [diff] [blame] | 1833 | /* statistics will be updated on the tx_complete */ |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1834 | dev_kfree_skb_any(skb); |
| 1835 | return NETDEV_TX_OK; |
| 1836 | case -ENOMEM: |
| 1837 | return NETDEV_TX_BUSY; |
| 1838 | default: |
Vladimir Kondratiev | afda8bb | 2013-01-28 18:31:07 +0200 | [diff] [blame] | 1839 | break; /* goto drop; */ |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1840 | } |
| 1841 | drop: |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1842 | ndev->stats.tx_dropped++; |
| 1843 | dev_kfree_skb_any(skb); |
| 1844 | |
| 1845 | return NET_XMIT_DROP; |
| 1846 | } |
| 1847 | |
Vladimir Kondratiev | 713c8a2 | 2015-01-25 10:52:49 +0200 | [diff] [blame] | 1848 | static inline bool wil_need_txstat(struct sk_buff *skb) |
| 1849 | { |
| 1850 | struct ethhdr *eth = (void *)skb->data; |
| 1851 | |
| 1852 | return is_unicast_ether_addr(eth->h_dest) && skb->sk && |
| 1853 | (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); |
| 1854 | } |
| 1855 | |
| 1856 | static inline void wil_consume_skb(struct sk_buff *skb, bool acked) |
| 1857 | { |
| 1858 | if (unlikely(wil_need_txstat(skb))) |
| 1859 | skb_complete_wifi_ack(skb, acked); |
| 1860 | else |
| 1861 | acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); |
| 1862 | } |
| 1863 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1864 | /** |
| 1865 | * Clean up transmitted skb's from the Tx VRING |
| 1866 | * |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 1867 | * Return number of descriptors cleared |
| 1868 | * |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1869 | * Safe to call from IRQ |
| 1870 | */ |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 1871 | int wil_tx_complete(struct wil6210_priv *wil, int ringid) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1872 | { |
Vladimir Kondratiev | 795ce73 | 2013-01-28 18:31:00 +0200 | [diff] [blame] | 1873 | struct net_device *ndev = wil_to_ndev(wil); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1874 | struct device *dev = wil_to_dev(wil); |
| 1875 | struct vring *vring = &wil->vring_tx[ringid]; |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 1876 | struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 1877 | int done = 0; |
Vladimir Kondratiev | c8b78b5 | 2014-02-27 16:20:49 +0200 | [diff] [blame] | 1878 | int cid = wil->vring2cid_tid[ringid][0]; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1879 | struct wil_net_stats *stats = NULL; |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1880 | volatile struct vring_tx_desc *_d; |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 1881 | int used_before_complete; |
| 1882 | int used_new; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1883 | |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1884 | if (unlikely(!vring->va)) { |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1885 | wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 1886 | return 0; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1887 | } |
| 1888 | |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1889 | if (unlikely(!txdata->enabled)) { |
Vladimir Kondratiev | 097638a | 2014-03-17 15:34:25 +0200 | [diff] [blame] | 1890 | wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); |
| 1891 | return 0; |
| 1892 | } |
| 1893 | |
Vladimir Kondratiev | 7743882 | 2013-01-28 18:31:06 +0200 | [diff] [blame] | 1894 | wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1895 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 1896 | used_before_complete = wil_vring_used_tx(vring); |
| 1897 | |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1898 | if (cid < WIL6210_MAX_CID) |
| 1899 | stats = &wil->sta[cid].stats; |
| 1900 | |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1901 | while (!wil_vring_is_empty(vring)) { |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1902 | int new_swtail; |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 1903 | struct wil_ctx *ctx = &vring->ctx[vring->swtail]; |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1904 | /** |
| 1905 | * For the fragmented skb, HW will set DU bit only for the |
Vladimir Kondratiev | 3d4bde1 | 2015-07-30 13:51:56 +0300 | [diff] [blame] | 1906 | * last fragment. look for it. |
| 1907 | * In TSO the first DU will include hdr desc |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1908 | */ |
| 1909 | int lf = (vring->swtail + ctx->nr_frags) % vring->size; |
| 1910 | /* TODO: check we are not past head */ |
Vladimir Kondratiev | 4de41be | 2013-04-18 14:33:52 +0300 | [diff] [blame] | 1911 | |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1912 | _d = &vring->va[lf].tx; |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1913 | if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1914 | break; |
| 1915 | |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1916 | new_swtail = (lf + 1) % vring->size; |
| 1917 | while (vring->swtail != new_swtail) { |
| 1918 | struct vring_tx_desc dd, *d = ⅆ |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1919 | u16 dmalen; |
Vladimir Kondratiev | 76dfa4b | 2014-07-14 09:49:39 +0300 | [diff] [blame] | 1920 | struct sk_buff *skb; |
| 1921 | |
| 1922 | ctx = &vring->ctx[vring->swtail]; |
| 1923 | skb = ctx->skb; |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1924 | _d = &vring->va[vring->swtail].tx; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1925 | |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1926 | *d = *_d; |
Vladimir Kondratiev | f88f113 | 2013-07-11 18:03:40 +0300 | [diff] [blame] | 1927 | |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1928 | dmalen = le16_to_cpu(d->dma.length); |
| 1929 | trace_wil6210_tx_done(ringid, vring->swtail, dmalen, |
| 1930 | d->dma.error); |
| 1931 | wil_dbg_txrx(wil, |
Vladimir Kondratiev | 5b29c57 | 2015-02-01 10:55:14 +0200 | [diff] [blame] | 1932 | "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", |
| 1933 | ringid, vring->swtail, dmalen, |
| 1934 | d->dma.status, d->dma.error); |
| 1935 | wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1936 | (const void *)d, sizeof(*d), false); |
| 1937 | |
Vladimir Kondratiev | 2232abd | 2014-03-17 15:34:09 +0200 | [diff] [blame] | 1938 | wil_txdesc_unmap(dev, d, ctx); |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1939 | |
| 1940 | if (skb) { |
Vladimir Kondratiev | 33c477f | 2015-02-15 14:02:33 +0200 | [diff] [blame] | 1941 | if (likely(d->dma.error == 0)) { |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1942 | ndev->stats.tx_packets++; |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1943 | ndev->stats.tx_bytes += skb->len; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1944 | if (stats) { |
| 1945 | stats->tx_packets++; |
| 1946 | stats->tx_bytes += skb->len; |
| 1947 | } |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1948 | } else { |
| 1949 | ndev->stats.tx_errors++; |
Vladimir Kondratiev | 41d6b09 | 2015-03-15 16:00:23 +0200 | [diff] [blame] | 1950 | if (stats) |
| 1951 | stats->tx_errors++; |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1952 | } |
Vladimir Kondratiev | 713c8a2 | 2015-01-25 10:52:49 +0200 | [diff] [blame] | 1953 | wil_consume_skb(skb, d->dma.error == 0); |
Vladimir Kondratiev | 795ce73 | 2013-01-28 18:31:00 +0200 | [diff] [blame] | 1954 | } |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1955 | memset(ctx, 0, sizeof(*ctx)); |
Maya Erez | eb26cff | 2016-05-16 22:23:30 +0300 | [diff] [blame] | 1956 | /* Make sure the ctx is zeroed before updating the tail |
| 1957 | * to prevent a case where wil_tx_vring will see |
| 1958 | * this descriptor as used and handle it before ctx zero |
| 1959 | * is completed. |
| 1960 | */ |
| 1961 | wmb(); |
Vladimir Kondratiev | c236658 | 2014-03-17 15:34:08 +0200 | [diff] [blame] | 1962 | /* There is no need to touch HW descriptor: |
| 1963 | * - ststus bit TX_DMA_STATUS_DU is set by design, |
| 1964 | * so hardware will not try to process this desc., |
| 1965 | * - rest of descriptor will be initialized on Tx. |
| 1966 | */ |
| 1967 | vring->swtail = wil_vring_next_tail(vring); |
| 1968 | done++; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1969 | } |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1970 | } |
Vladimir Kondratiev | 67c3e1b | 2014-06-16 19:37:04 +0300 | [diff] [blame] | 1971 | |
Vladimir Shulman | 0436fd9 | 2015-02-15 14:02:34 +0200 | [diff] [blame] | 1972 | /* performance monitoring */ |
| 1973 | used_new = wil_vring_used_tx(vring); |
| 1974 | if (wil_val_in_range(vring_idle_trsh, |
| 1975 | used_new, used_before_complete)) { |
| 1976 | wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", |
| 1977 | ringid, used_before_complete, used_new); |
Vladimir Kondratiev | 7c0acf8 | 2014-06-16 19:37:05 +0300 | [diff] [blame] | 1978 | txdata->last_idle = get_cycles(); |
| 1979 | } |
Vladimir Kondratiev | 67c3e1b | 2014-06-16 19:37:04 +0300 | [diff] [blame] | 1980 | |
Vladimir Kondratiev | 55f8f68 | 2014-06-16 19:37:23 +0300 | [diff] [blame] | 1981 | if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { |
| 1982 | wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1983 | netif_tx_wake_all_queues(wil_to_ndev(wil)); |
Vladimir Kondratiev | 55f8f68 | 2014-06-16 19:37:23 +0300 | [diff] [blame] | 1984 | } |
Vladimir Kondratiev | e0287c4 | 2013-05-12 14:43:36 +0300 | [diff] [blame] | 1985 | |
| 1986 | return done; |
Vladimir Kondratiev | 2be7d22 | 2012-12-20 13:13:19 -0800 | [diff] [blame] | 1987 | } |