12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3e00243faSLior David * Copyright (c) 2018, The Linux Foundation. All rights reserved. 42be7d22fSVladimir Kondratiev * 52be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 62be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 72be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 82be7d22fSVladimir Kondratiev * 92be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 102be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 112be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 122be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 132be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 142be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 152be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 162be7d22fSVladimir Kondratiev */ 172be7d22fSVladimir Kondratiev 182be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 192be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 202be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 212be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 22504937d4SKirshenbaum Erez #include <linux/ip.h> 23504937d4SKirshenbaum Erez #include <linux/ipv6.h> 24504937d4SKirshenbaum Erez #include <net/ipv6.h> 250786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 262be7d22fSVladimir Kondratiev 272be7d22fSVladimir Kondratiev #include "wil6210.h" 282be7d22fSVladimir Kondratiev #include "wmi.h" 292be7d22fSVladimir Kondratiev #include "txrx.h" 3098658095SVladimir Kondratiev #include "trace.h" 312be7d22fSVladimir Kondratiev 322be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3378484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 342be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 352be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 362be7d22fSVladimir Kondratiev 37c406ea7cSVladimir Kondratiev bool rx_align_2; 3878484c44SMaya Erez module_param(rx_align_2, bool, 0444); 39c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 40c406ea7cSVladimir Kondratiev 4152a45702SLior David bool rx_large_buf; 4252a45702SLior David module_param(rx_large_buf, bool, 0444); 4352a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4452a45702SLior David 45c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 46c406ea7cSVladimir Kondratiev { 47c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 48c406ea7cSVladimir Kondratiev } 49c406ea7cSVladimir Kondratiev 502be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 512be7d22fSVladimir Kondratiev { 522be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 532be7d22fSVladimir Kondratiev } 542be7d22fSVladimir Kondratiev 552be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 562be7d22fSVladimir Kondratiev { 572be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 582be7d22fSVladimir Kondratiev } 592be7d22fSVladimir Kondratiev 602be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 612be7d22fSVladimir Kondratiev { 622be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 632be7d22fSVladimir Kondratiev } 642be7d22fSVladimir Kondratiev 652be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 662be7d22fSVladimir Kondratiev { 672be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 682be7d22fSVladimir Kondratiev } 698fe59627SVladimir Kondratiev 700436fd9aSVladimir Shulman /* Used space in Tx Vring */ 710436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 722be7d22fSVladimir Kondratiev { 732be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 742be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 750436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 762be7d22fSVladimir Kondratiev } 772be7d22fSVladimir Kondratiev 780436fd9aSVladimir Shulman /* Available space in Tx Vring */ 790436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 800436fd9aSVladimir Shulman { 810436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 820436fd9aSVladimir Shulman } 830436fd9aSVladimir Shulman 840436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 855bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 865bb6423eSVladimir Kondratiev { 875bb6423eSVladimir Kondratiev return vring->size/8; 885bb6423eSVladimir Kondratiev } 895bb6423eSVladimir Kondratiev 900436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 915bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 925bb6423eSVladimir Kondratiev { 935bb6423eSVladimir Kondratiev return vring->size/4; 945bb6423eSVladimir Kondratiev } 955bb6423eSVladimir Kondratiev 96f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 97f9e3033fSDedy Lansky static inline int wil_vring_avail_low(struct vring *vring) 98f9e3033fSDedy Lansky { 99f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring); 100f9e3033fSDedy Lansky } 101f9e3033fSDedy Lansky 102f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 103f9e3033fSDedy Lansky static inline int wil_vring_avail_high(struct vring *vring) 104f9e3033fSDedy Lansky { 105f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring); 106f9e3033fSDedy Lansky } 107f9e3033fSDedy Lansky 108fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 109fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 110fe9ee51eSMaya Erez { 111fe9ee51eSMaya Erez int i; 112fe9ee51eSMaya Erez unsigned long data_comp_to; 113fe9ee51eSMaya Erez 114fe9ee51eSMaya Erez for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 115fe9ee51eSMaya Erez struct vring *vring = &wil->vring_tx[i]; 116fe9ee51eSMaya Erez int vring_index = vring - wil->vring_tx; 117fe9ee51eSMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 118fe9ee51eSMaya Erez 119fe9ee51eSMaya Erez spin_lock(&txdata->lock); 120fe9ee51eSMaya Erez 121fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 122fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 123fe9ee51eSMaya Erez continue; 124fe9ee51eSMaya Erez } 125fe9ee51eSMaya Erez 126fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 127fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 128fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 129fe9ee51eSMaya Erez while (!wil_vring_is_empty(vring)) { 130fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 131fe9ee51eSMaya Erez wil_dbg_pm(wil, 132fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 133fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 134fe9ee51eSMaya Erez return false; 135fe9ee51eSMaya Erez } 136fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 137fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 138fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 139fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 140fe9ee51eSMaya Erez msleep(20); 141fe9ee51eSMaya Erez spin_lock(&txdata->lock); 142fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 143fe9ee51eSMaya Erez break; 144fe9ee51eSMaya Erez } 145fe9ee51eSMaya Erez } 146fe9ee51eSMaya Erez 147fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 148fe9ee51eSMaya Erez } 149fe9ee51eSMaya Erez 150fe9ee51eSMaya Erez return true; 151fe9ee51eSMaya Erez } 152fe9ee51eSMaya Erez 1530436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 1540436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 1550436fd9aSVladimir Shulman { 1560436fd9aSVladimir Shulman return val >= min && val < max; 1570436fd9aSVladimir Shulman } 1580436fd9aSVladimir Shulman 1592be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 1602be7d22fSVladimir Kondratiev { 1612be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1622be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1632be7d22fSVladimir Kondratiev uint i; 1642be7d22fSVladimir Kondratiev 165af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1669cf10d62SVladimir Kondratiev 1672be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1682be7d22fSVladimir Kondratiev 1692be7d22fSVladimir Kondratiev vring->swhead = 0; 1702be7d22fSVladimir Kondratiev vring->swtail = 0; 171f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1722be7d22fSVladimir Kondratiev if (!vring->ctx) { 1732be7d22fSVladimir Kondratiev vring->va = NULL; 1742be7d22fSVladimir Kondratiev return -ENOMEM; 1752be7d22fSVladimir Kondratiev } 176f2de576dSHamad Kadmany 1770436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 178f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 179f2de576dSHamad Kadmany * 180f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 181f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1823dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1833dc2c13bSLazar Alexei * allocation before allocating vring memory. 184f2de576dSHamad Kadmany * 185f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 186f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 187f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1882be7d22fSVladimir Kondratiev */ 1893dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 190f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 191f2de576dSHamad Kadmany 1922be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1932be7d22fSVladimir Kondratiev if (!vring->va) { 1942be7d22fSVladimir Kondratiev kfree(vring->ctx); 1952be7d22fSVladimir Kondratiev vring->ctx = NULL; 1962be7d22fSVladimir Kondratiev return -ENOMEM; 1972be7d22fSVladimir Kondratiev } 198f2de576dSHamad Kadmany 1993dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 2003dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 2013dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 202f2de576dSHamad Kadmany 2032be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 2042be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 2052be7d22fSVladimir Kondratiev * we can use any 2062be7d22fSVladimir Kondratiev */ 2072be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 2088fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 2098fe59627SVladimir Kondratiev 21068ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 2112be7d22fSVladimir Kondratiev } 2122be7d22fSVladimir Kondratiev 21339c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 21439c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 2152be7d22fSVladimir Kondratiev 2162be7d22fSVladimir Kondratiev return 0; 2172be7d22fSVladimir Kondratiev } 2182be7d22fSVladimir Kondratiev 2192232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 2202232abd5SVladimir Kondratiev struct wil_ctx *ctx) 2212232abd5SVladimir Kondratiev { 2222232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 2232232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 2248fe59627SVladimir Kondratiev 2252232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 2262232abd5SVladimir Kondratiev case wil_mapped_as_single: 2272232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 2282232abd5SVladimir Kondratiev break; 2292232abd5SVladimir Kondratiev case wil_mapped_as_page: 2302232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 2312232abd5SVladimir Kondratiev break; 2322232abd5SVladimir Kondratiev default: 2332232abd5SVladimir Kondratiev break; 2342232abd5SVladimir Kondratiev } 2352232abd5SVladimir Kondratiev } 2362232abd5SVladimir Kondratiev 2372be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 2382be7d22fSVladimir Kondratiev int tx) 2392be7d22fSVladimir Kondratiev { 2402be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2412be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2422be7d22fSVladimir Kondratiev 2439b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 244ef77285fSVladimir Kondratiev if (tx) { 245ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 246ef77285fSVladimir Kondratiev 247ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 248ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 249ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 250ef77285fSVladimir Kondratiev } else { 251ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 252ef77285fSVladimir Kondratiev vring->size, vring->va, 253ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 254ef77285fSVladimir Kondratiev } 255ef77285fSVladimir Kondratiev 2562be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 25768ada71eSVladimir Kondratiev dma_addr_t pa; 2587e594444SVladimir Kondratiev u16 dmalen; 259f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 26068ada71eSVladimir Kondratiev 2612be7d22fSVladimir Kondratiev if (tx) { 26268ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 26368ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 2642be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 26568ada71eSVladimir Kondratiev 266f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 26734b8886eSMaya Erez if (!ctx) { 26834b8886eSMaya Erez wil_dbg_txrx(wil, 26934b8886eSMaya Erez "ctx(%d) was already completed\n", 27034b8886eSMaya Erez vring->swtail); 27134b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 27234b8886eSMaya Erez continue; 27334b8886eSMaya Erez } 27468ada71eSVladimir Kondratiev *d = *_d; 2752232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 276f88f113aSVladimir Kondratiev if (ctx->skb) 277f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 2782be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2792be7d22fSVladimir Kondratiev } else { /* rx */ 28068ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 28168ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2824d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 28368ada71eSVladimir Kondratiev 284f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 28568ada71eSVladimir Kondratiev *d = *_d; 28668ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2877e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2887e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 289f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2902be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2912be7d22fSVladimir Kondratiev } 2922be7d22fSVladimir Kondratiev } 2932be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2942be7d22fSVladimir Kondratiev kfree(vring->ctx); 2952be7d22fSVladimir Kondratiev vring->pa = 0; 2962be7d22fSVladimir Kondratiev vring->va = NULL; 2972be7d22fSVladimir Kondratiev vring->ctx = NULL; 2982be7d22fSVladimir Kondratiev } 2992be7d22fSVladimir Kondratiev 3002be7d22fSVladimir Kondratiev /** 3012be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 3022be7d22fSVladimir Kondratiev * 3032be7d22fSVladimir Kondratiev * Safe to call from IRQ 3042be7d22fSVladimir Kondratiev */ 3052be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 3062be7d22fSVladimir Kondratiev u32 i, int headroom) 3072be7d22fSVladimir Kondratiev { 3082be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 30952a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 31068ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 3118fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 3122be7d22fSVladimir Kondratiev dma_addr_t pa; 3132be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 3148fe59627SVladimir Kondratiev 3152be7d22fSVladimir Kondratiev if (unlikely(!skb)) 3162be7d22fSVladimir Kondratiev return -ENOMEM; 3172be7d22fSVladimir Kondratiev 3182be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 3192be7d22fSVladimir Kondratiev skb_put(skb, sz); 3202be7d22fSVladimir Kondratiev 3212be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 3222be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 3232be7d22fSVladimir Kondratiev kfree_skb(skb); 3242be7d22fSVladimir Kondratiev return -ENOMEM; 3252be7d22fSVladimir Kondratiev } 3262be7d22fSVladimir Kondratiev 32748c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 32868ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 3292be7d22fSVladimir Kondratiev /* ip_length don't care */ 3302be7d22fSVladimir Kondratiev /* b11 don't care */ 3312be7d22fSVladimir Kondratiev /* error don't care */ 3322be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3337e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 33468ada71eSVladimir Kondratiev *_d = *d; 335f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3362be7d22fSVladimir Kondratiev 3372be7d22fSVladimir Kondratiev return 0; 3382be7d22fSVladimir Kondratiev } 3392be7d22fSVladimir Kondratiev 3402be7d22fSVladimir Kondratiev /** 3412be7d22fSVladimir Kondratiev * Adds radiotap header 3422be7d22fSVladimir Kondratiev * 3432be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3442be7d22fSVladimir Kondratiev * 3452be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3462be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3472be7d22fSVladimir Kondratiev * - Phy info 3482be7d22fSVladimir Kondratiev */ 3492be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 35033e61169SVladimir Kondratiev struct sk_buff *skb) 3512be7d22fSVladimir Kondratiev { 3522be7d22fSVladimir Kondratiev struct wil6210_rtap { 3532be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3542be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3552be7d22fSVladimir Kondratiev /* flags */ 3562be7d22fSVladimir Kondratiev u8 flags; 3572be7d22fSVladimir Kondratiev /* channel */ 3582be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3592be7d22fSVladimir Kondratiev __le16 chnl_flags; 3602be7d22fSVladimir Kondratiev /* MCS */ 3612be7d22fSVladimir Kondratiev u8 mcs_present; 3622be7d22fSVladimir Kondratiev u8 mcs_flags; 3632be7d22fSVladimir Kondratiev u8 mcs_index; 3642be7d22fSVladimir Kondratiev } __packed; 3652be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3662be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3672be7d22fSVladimir Kondratiev /* vendor */ 3682be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3692be7d22fSVladimir Kondratiev u8 vendor_ns; 3702be7d22fSVladimir Kondratiev __le16 vendor_skip; 3712be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3722be7d22fSVladimir Kondratiev } __packed; 37333e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3742be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3752be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3762be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3772be7d22fSVladimir Kondratiev static char phy_data[128]; 3787d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3792be7d22fSVladimir Kondratiev 3802be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3812be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3822be7d22fSVladimir Kondratiev /* calculate additional length */ 3832be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3842be7d22fSVladimir Kondratiev /** 3852be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3862be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3872be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3882be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3892be7d22fSVladimir Kondratiev */ 3902be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3912be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3928fe59627SVladimir Kondratiev 3932be7d22fSVladimir Kondratiev if (len > 8) { 3942be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3952be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3968fe59627SVladimir Kondratiev 3972be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3982be7d22fSVladimir Kondratiev phy_length = len - 8; 3992be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 4002be7d22fSVladimir Kondratiev } 4012be7d22fSVladimir Kondratiev } 4022be7d22fSVladimir Kondratiev } 4032be7d22fSVladimir Kondratiev rtap_len += phy_length; 4042be7d22fSVladimir Kondratiev } 4052be7d22fSVladimir Kondratiev 4062be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 4072be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 4089165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 4092be7d22fSVladimir Kondratiev return; 4102be7d22fSVladimir Kondratiev } 4112be7d22fSVladimir Kondratiev 412d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 4132be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 4142be7d22fSVladimir Kondratiev 4152be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 4162be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 4172be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 4182be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 4192be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 4202be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 4212be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 4222be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 4232be7d22fSVladimir Kondratiev 4242be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 4252be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 4262be7d22fSVladimir Kondratiev 4272be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 4282be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 4292be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 4302be7d22fSVladimir Kondratiev 4312be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 4322be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 4332be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 4342be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 4352be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 4362be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 4372be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4382be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4392be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4402be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4412be7d22fSVladimir Kondratiev phy_length); 4422be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4432be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4442be7d22fSVladimir Kondratiev phy_length); 4452be7d22fSVladimir Kondratiev } 4462be7d22fSVladimir Kondratiev } 4472be7d22fSVladimir Kondratiev 448a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 449a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 450a8313341SVladimir Kondratiev { 451a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 452a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 453a8313341SVladimir Kondratiev } 454a8313341SVladimir Kondratiev 455fe9ee51eSMaya Erez bool wil_is_rx_idle(struct wil6210_priv *wil) 456fe9ee51eSMaya Erez { 457fe9ee51eSMaya Erez struct vring_rx_desc *_d; 458fe9ee51eSMaya Erez struct vring *vring = &wil->vring_rx; 459fe9ee51eSMaya Erez 460fe9ee51eSMaya Erez _d = (struct vring_rx_desc *)&vring->va[vring->swhead].rx; 461fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 462fe9ee51eSMaya Erez return false; 463fe9ee51eSMaya Erez 464fe9ee51eSMaya Erez return true; 465fe9ee51eSMaya Erez } 466fe9ee51eSMaya Erez 4672be7d22fSVladimir Kondratiev /** 4682be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4692be7d22fSVladimir Kondratiev * 47033e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 47133e61169SVladimir Kondratiev * 4722be7d22fSVladimir Kondratiev * Safe to call from IRQ 4732be7d22fSVladimir Kondratiev */ 4742be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 4752be7d22fSVladimir Kondratiev struct vring *vring) 4762be7d22fSVladimir Kondratiev { 4772be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4785bd60982SLior David struct wil6210_vif *vif; 4795bd60982SLior David struct net_device *ndev; 48068ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 48168ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4822be7d22fSVladimir Kondratiev struct sk_buff *skb; 4832be7d22fSVladimir Kondratiev dma_addr_t pa; 484c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 48552a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4867e594444SVladimir Kondratiev u16 dmalen; 4872be7d22fSVladimir Kondratiev u8 ftype; 4885bd60982SLior David int cid, mid; 4893b282bc6SVladimir Kondratiev int i; 490c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 491c8b78b5fSVladimir Kondratiev 49233e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 49333e61169SVladimir Kondratiev 4943b282bc6SVladimir Kondratiev again: 49533c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4962be7d22fSVladimir Kondratiev return NULL; 4972be7d22fSVladimir Kondratiev 4983b282bc6SVladimir Kondratiev i = (int)vring->swhead; 499148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 50033c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 5012be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 5022be7d22fSVladimir Kondratiev return NULL; 5032be7d22fSVladimir Kondratiev } 5042be7d22fSVladimir Kondratiev 505148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 506148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 507148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 508148416a9SVladimir Kondratiev if (!skb) { 509148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 5103b282bc6SVladimir Kondratiev goto again; 511148416a9SVladimir Kondratiev } 51268ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 51368ada71eSVladimir Kondratiev *d = *_d; 51468ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 51568ada71eSVladimir Kondratiev 51668ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 51768ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 51868ada71eSVladimir Kondratiev 519148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 520148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 521a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 52268ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 52368ada71eSVladimir Kondratiev 5243b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 5255bd60982SLior David mid = wil_rxdesc_mid(d); 5265bd60982SLior David vif = wil->vifs[mid]; 5275bd60982SLior David 5285bd60982SLior David if (unlikely(!vif)) { 5295bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 5305bd60982SLior David mid); 5315bd60982SLior David kfree_skb(skb); 5325bd60982SLior David goto again; 5335bd60982SLior David } 5345bd60982SLior David ndev = vif_to_ndev(vif); 5353b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 5363b282bc6SVladimir Kondratiev 53733c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 538e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5393b282bc6SVladimir Kondratiev stats->rx_large_frame++; 540110dea00SWei Yongjun kfree_skb(skb); 5413b282bc6SVladimir Kondratiev goto again; 542e270045bSVladimir Kondratiev } 5437e594444SVladimir Kondratiev skb_trim(skb, dmalen); 54433e61169SVladimir Kondratiev 5451cbbcb08SVladimir Kondratiev prefetch(skb->data); 5461cbbcb08SVladimir Kondratiev 547c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 548c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 549c0d37713SVladimir Kondratiev 550c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 551c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 552c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5532be7d22fSVladimir Kondratiev 5542be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5552be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 55633e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5572be7d22fSVladimir Kondratiev 5582be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5592be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5602be7d22fSVladimir Kondratiev return skb; 561a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5622be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5632be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5642be7d22fSVladimir Kondratiev */ 56568ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 56633c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 567a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 568a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 569a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 570a8313341SVladimir Kondratiev 571a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 572a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 573a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5743b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 575a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 576a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 577a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 578a8313341SVladimir Kondratiev mid, cid, tid, seq); 5795bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 580a8313341SVladimir Kondratiev } else { 581a8313341SVladimir Kondratiev /* print again all info. One can enable only this 582a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 583a8313341SVladimir Kondratiev */ 584a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 585a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 586a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 587a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 588a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 589a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 590a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 591a8313341SVladimir Kondratiev } 5922be7d22fSVladimir Kondratiev kfree_skb(skb); 5933b282bc6SVladimir Kondratiev goto again; 5942be7d22fSVladimir Kondratiev } 5952be7d22fSVladimir Kondratiev 596c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5972be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5983b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5992be7d22fSVladimir Kondratiev kfree_skb(skb); 6003b282bc6SVladimir Kondratiev goto again; 6012be7d22fSVladimir Kondratiev } 6022be7d22fSVladimir Kondratiev 603504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 604504937d4SKirshenbaum Erez * and in case of error drop the packet 605504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 606504937d4SKirshenbaum Erez */ 60733c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 608504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 60933c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 610504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 6114a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 6124a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 6134a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 6144a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 6154a68ab10SVladimir Kondratiev */ 616504937d4SKirshenbaum Erez } 617504937d4SKirshenbaum Erez 618c406ea7cSVladimir Kondratiev if (snaplen) { 619c406ea7cSVladimir Kondratiev /* Packet layout 620c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 621c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 622c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 623c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 624c406ea7cSVladimir Kondratiev */ 625c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 626c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 627c406ea7cSVladimir Kondratiev } 628c406ea7cSVladimir Kondratiev 6292be7d22fSVladimir Kondratiev return skb; 6302be7d22fSVladimir Kondratiev } 6312be7d22fSVladimir Kondratiev 6322be7d22fSVladimir Kondratiev /** 6332be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 6342be7d22fSVladimir Kondratiev * buffers posted at @swtail 6355bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6365bd60982SLior David * allocate skbs with headroom according to main interface only. This 6375bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6385bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6395bd60982SLior David * and we will need to fix this code once we add support. 6402be7d22fSVladimir Kondratiev */ 6412be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6422be7d22fSVladimir Kondratiev { 643e00243faSLior David struct net_device *ndev = wil->main_ndev; 6442be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 6452be7d22fSVladimir Kondratiev u32 next_tail; 6462be7d22fSVladimir Kondratiev int rc = 0; 6472be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6482be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6492be7d22fSVladimir Kondratiev 6502be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 6512be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6522be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6532be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 65433c477fdSVladimir Kondratiev if (unlikely(rc)) { 6552be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 6562be7d22fSVladimir Kondratiev rc, v->swtail); 6572be7d22fSVladimir Kondratiev break; 6582be7d22fSVladimir Kondratiev } 6592be7d22fSVladimir Kondratiev } 660ab6d7cc3SMaya Erez 661ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 662ab6d7cc3SMaya Erez * committing them to HW 663ab6d7cc3SMaya Erez */ 664ab6d7cc3SMaya Erez wmb(); 665ab6d7cc3SMaya Erez 666b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6672be7d22fSVladimir Kondratiev 6682be7d22fSVladimir Kondratiev return rc; 6692be7d22fSVladimir Kondratiev } 6702be7d22fSVladimir Kondratiev 67158527421SVladimir Kondratiev /** 67258527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 67358527421SVladimir Kondratiev * @cs: One area of memory 67458527421SVladimir Kondratiev * @ct: Another area of memory 67558527421SVladimir Kondratiev * @count: The size of the area. 67658527421SVladimir Kondratiev * 67758527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 67858527421SVladimir Kondratiev * with minimal modifications 67958527421SVladimir Kondratiev */ 68058527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 68158527421SVladimir Kondratiev { 68258527421SVladimir Kondratiev const unsigned char *su1, *su2; 68358527421SVladimir Kondratiev int res = 0; 68458527421SVladimir Kondratiev 68558527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 68658527421SVladimir Kondratiev --su1, --su2, count--) { 68758527421SVladimir Kondratiev res = *su1 - *su2; 68858527421SVladimir Kondratiev if (res) 68958527421SVladimir Kondratiev break; 69058527421SVladimir Kondratiev } 69158527421SVladimir Kondratiev return res; 69258527421SVladimir Kondratiev } 69358527421SVladimir Kondratiev 69458527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 69558527421SVladimir Kondratiev { 69658527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 69758527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 69858527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 69958527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 70058527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 70158527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 70258527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 70358527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 70458527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 70558527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 70658527421SVladimir Kondratiev 70758527421SVladimir Kondratiev if (!cc->key_set) { 70858527421SVladimir Kondratiev wil_err_ratelimited(wil, 70958527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 71058527421SVladimir Kondratiev cid, tid, mc, key_id); 71158527421SVladimir Kondratiev return -EINVAL; 71258527421SVladimir Kondratiev } 71358527421SVladimir Kondratiev 71458527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 71558527421SVladimir Kondratiev wil_err_ratelimited(wil, 71658527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 71758527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 71858527421SVladimir Kondratiev return -EINVAL; 71958527421SVladimir Kondratiev } 72058527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 72158527421SVladimir Kondratiev 72258527421SVladimir Kondratiev return 0; 72358527421SVladimir Kondratiev } 72458527421SVladimir Kondratiev 7252be7d22fSVladimir Kondratiev /* 7262be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 727e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 7282be7d22fSVladimir Kondratiev */ 729b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 7302be7d22fSVladimir Kondratiev { 731c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 732e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 733c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 734e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 7352be7d22fSVladimir Kondratiev unsigned int len = skb->len; 736c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 73741d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 73858527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 739c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 740c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 741c42da999SVladimir Kondratiev * is not suitable, need to look at data 742c42da999SVladimir Kondratiev */ 743c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 744c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 745c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 746c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 747c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 748c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 749c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 750c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 751c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 752c42da999SVladimir Kondratiev }; 7532be7d22fSVladimir Kondratiev 7540553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7550553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7560553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7570553640dSVladimir Shulman * mechanism, core will be chosen according 7580553640dSVladimir Shulman * to user-level rps configuration. 7590553640dSVladimir Shulman */ 7600553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7610553640dSVladimir Shulman 762241804cbSVladimir Kondratiev skb_orphan(skb); 763241804cbSVladimir Kondratiev 76458527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 76558527421SVladimir Kondratiev rc = GRO_DROP; 76658527421SVladimir Kondratiev dev_kfree_skb(skb); 76758527421SVladimir Kondratiev stats->rx_replay++; 76858527421SVladimir Kondratiev goto stats; 76958527421SVladimir Kondratiev } 77058527421SVladimir Kondratiev 771e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 772c42da999SVladimir Kondratiev if (mcast) { 773c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 774c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 775c42da999SVladimir Kondratiev */ 776c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 777c42da999SVladimir Kondratiev } else { 778e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 779e00243faSLior David eth->h_dest); 7802be7d22fSVladimir Kondratiev 781c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 782c42da999SVladimir Kondratiev /* The destination station is associated to 783c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 784c42da999SVladimir Kondratiev * directly to it and do not pass it to local 785c42da999SVladimir Kondratiev * net stack. 786c42da999SVladimir Kondratiev */ 787c42da999SVladimir Kondratiev xmit_skb = skb; 788c42da999SVladimir Kondratiev skb = NULL; 789c42da999SVladimir Kondratiev } 790c42da999SVladimir Kondratiev } 791c42da999SVladimir Kondratiev } 792c42da999SVladimir Kondratiev if (xmit_skb) { 793c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 794c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 795c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 796c42da999SVladimir Kondratiev */ 797c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 798c42da999SVladimir Kondratiev xmit_skb->priority += 256; 799c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 800c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 801c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 802c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 803c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 804c42da999SVladimir Kondratiev } 805c42da999SVladimir Kondratiev 806c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 807c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 8085bd60982SLior David skb->dev = ndev; 809c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 810c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 811c42da999SVladimir Kondratiev len, gro_res_str[rc]); 812c42da999SVladimir Kondratiev } 81358527421SVladimir Kondratiev stats: 814c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 815b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 816b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 817b5998e6aSVladimir Kondratiev stats->rx_dropped++; 818b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 819b5998e6aSVladimir Kondratiev } else { 8202be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 821c8b78b5fSVladimir Kondratiev stats->rx_packets++; 8222be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 823c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 824c42da999SVladimir Kondratiev if (mcast) 825c42da999SVladimir Kondratiev ndev->stats.multicast++; 826194b482bSVladimir Kondratiev } 8272be7d22fSVladimir Kondratiev } 8282be7d22fSVladimir Kondratiev 8292be7d22fSVladimir Kondratiev /** 8302be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 8312be7d22fSVladimir Kondratiev * 832e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8332be7d22fSVladimir Kondratiev */ 834e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8352be7d22fSVladimir Kondratiev { 836e00243faSLior David struct net_device *ndev = wil->main_ndev; 837e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 8382be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 8392be7d22fSVladimir Kondratiev struct sk_buff *skb; 8402be7d22fSVladimir Kondratiev 84133c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8422be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8432be7d22fSVladimir Kondratiev return; 8442be7d22fSVladimir Kondratiev } 845af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 846e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 847e0287c4aSVladimir Kondratiev (*quota)--; 8482be7d22fSVladimir Kondratiev 849e00243faSLior David /* monitor is currently supported on main interface only */ 850e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8512be7d22fSVladimir Kondratiev skb->dev = ndev; 8522be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8532be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8542be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8552be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 856b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8572be7d22fSVladimir Kondratiev } else { 858b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8592be7d22fSVladimir Kondratiev } 8602be7d22fSVladimir Kondratiev } 8612be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8622be7d22fSVladimir Kondratiev } 8632be7d22fSVladimir Kondratiev 86452a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 86552a45702SLior David { 86652a45702SLior David wil->rx_buf_len = rx_large_buf ? 86752a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 86852a45702SLior David if (mtu_max > wil->rx_buf_len) { 86952a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 87052a45702SLior David * backward compatibility (mtu_max parameter was also used 87152a45702SLior David * to support receiving large packets) 87252a45702SLior David */ 87352a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 87452a45702SLior David wil->rx_buf_len = mtu_max; 87552a45702SLior David } 87652a45702SLior David } 87752a45702SLior David 878d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 8792be7d22fSVladimir Kondratiev { 8802be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8812be7d22fSVladimir Kondratiev int rc; 8822be7d22fSVladimir Kondratiev 883af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8849cf10d62SVladimir Kondratiev 8858bf6adb9SVladimir Kondratiev if (vring->va) { 8868bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8878bf6adb9SVladimir Kondratiev return -EINVAL; 8888bf6adb9SVladimir Kondratiev } 8898bf6adb9SVladimir Kondratiev 89052a45702SLior David wil_rx_buf_len_init(wil); 89152a45702SLior David 892d3762b40SVladimir Kondratiev vring->size = size; 8932be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8942be7d22fSVladimir Kondratiev if (rc) 8952be7d22fSVladimir Kondratiev return rc; 8962be7d22fSVladimir Kondratiev 89747e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8982be7d22fSVladimir Kondratiev if (rc) 8992be7d22fSVladimir Kondratiev goto err_free; 9002be7d22fSVladimir Kondratiev 9012be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 9022be7d22fSVladimir Kondratiev if (rc) 9032be7d22fSVladimir Kondratiev goto err_free; 9042be7d22fSVladimir Kondratiev 9052be7d22fSVladimir Kondratiev return 0; 9062be7d22fSVladimir Kondratiev err_free: 9072be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 9082be7d22fSVladimir Kondratiev 9092be7d22fSVladimir Kondratiev return rc; 9102be7d22fSVladimir Kondratiev } 9112be7d22fSVladimir Kondratiev 9122be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 9132be7d22fSVladimir Kondratiev { 9142be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 9152be7d22fSVladimir Kondratiev 916af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 9179cf10d62SVladimir Kondratiev 9182acb4220SVladimir Kondratiev if (vring->va) 9192be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 9202be7d22fSVladimir Kondratiev } 9212be7d22fSVladimir Kondratiev 922875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 923875e9439SMaya Erez { 924875e9439SMaya Erez spin_lock_bh(&txdata->lock); 925875e9439SMaya Erez txdata->dot1x_open = 0; 926875e9439SMaya Erez txdata->enabled = 0; 927875e9439SMaya Erez txdata->idle = 0; 928875e9439SMaya Erez txdata->last_idle = 0; 929875e9439SMaya Erez txdata->begin = 0; 930875e9439SMaya Erez txdata->agg_wsize = 0; 931875e9439SMaya Erez txdata->agg_timeout = 0; 932875e9439SMaya Erez txdata->agg_amsdu = 0; 933875e9439SMaya Erez txdata->addba_in_progress = false; 934e00243faSLior David txdata->mid = U8_MAX; 935875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 936875e9439SMaya Erez } 937875e9439SMaya Erez 938e00243faSLior David int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9392be7d22fSVladimir Kondratiev int cid, int tid) 9402be7d22fSVladimir Kondratiev { 941e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9422be7d22fSVladimir Kondratiev int rc; 9432be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9442be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9452be7d22fSVladimir Kondratiev .vring_cfg = { 9462be7d22fSVladimir Kondratiev .tx_sw_ring = { 9479a06bec9SVladimir Kondratiev .max_mpdu_size = 948c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 949b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9502be7d22fSVladimir Kondratiev }, 9512be7d22fSVladimir Kondratiev .ringid = id, 952a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9532be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9542be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9552be7d22fSVladimir Kondratiev .to_resolution = 0, 9563277213fSVladimir Kondratiev .agg_max_wsize = 0, 9572be7d22fSVladimir Kondratiev .schd_params = { 9582be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9592be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9602be7d22fSVladimir Kondratiev }, 9612be7d22fSVladimir Kondratiev }, 9622be7d22fSVladimir Kondratiev }; 9632be7d22fSVladimir Kondratiev struct { 964b874ddecSLior David struct wmi_cmd_hdr wmi; 9652be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 9662be7d22fSVladimir Kondratiev } __packed reply; 9672be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 968097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9692be7d22fSVladimir Kondratiev 970af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 971e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9729b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9739cf10d62SVladimir Kondratiev 9742be7d22fSVladimir Kondratiev if (vring->va) { 9752be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9762be7d22fSVladimir Kondratiev rc = -EINVAL; 9772be7d22fSVladimir Kondratiev goto out; 9782be7d22fSVladimir Kondratiev } 9792be7d22fSVladimir Kondratiev 980875e9439SMaya Erez wil_tx_data_init(txdata); 9812be7d22fSVladimir Kondratiev vring->size = size; 9822be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9832be7d22fSVladimir Kondratiev if (rc) 9842be7d22fSVladimir Kondratiev goto out; 9852be7d22fSVladimir Kondratiev 98693ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 98793ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 98893ae6d49SVladimir Kondratiev 9892be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9902be7d22fSVladimir Kondratiev 991e00243faSLior David if (!vif->privacy) 992230d8442SVladimir Kondratiev txdata->dot1x_open = true; 993e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9942be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9952be7d22fSVladimir Kondratiev if (rc) 9962be7d22fSVladimir Kondratiev goto out_free; 9972be7d22fSVladimir Kondratiev 998b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9992be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 10002be7d22fSVladimir Kondratiev reply.cmd.status); 1001c331997bSVladimir Kondratiev rc = -EINVAL; 10022be7d22fSVladimir Kondratiev goto out_free; 10032be7d22fSVladimir Kondratiev } 10042be7d22fSVladimir Kondratiev 1005dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1006dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1007e00243faSLior David txdata->mid = vif->mid; 1008097638a0SVladimir Kondratiev txdata->enabled = 1; 1009dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1010dc90506fSMaya Erez 1011230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 10123a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1013097638a0SVladimir Kondratiev 10142be7d22fSVladimir Kondratiev return 0; 10152be7d22fSVladimir Kondratiev out_free: 1016875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1017230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1018230d8442SVladimir Kondratiev txdata->enabled = 0; 1019875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 10202be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 10210916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 10220916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 10230916d9f2SMaya Erez 10242be7d22fSVladimir Kondratiev out: 10252be7d22fSVladimir Kondratiev 10262be7d22fSVladimir Kondratiev return rc; 10272be7d22fSVladimir Kondratiev } 10282be7d22fSVladimir Kondratiev 1029e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 103041d6b093SVladimir Kondratiev { 1031e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 103241d6b093SVladimir Kondratiev int rc; 103341d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 103441d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 103541d6b093SVladimir Kondratiev .vring_cfg = { 103641d6b093SVladimir Kondratiev .tx_sw_ring = { 103741d6b093SVladimir Kondratiev .max_mpdu_size = 103841d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 103941d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 104041d6b093SVladimir Kondratiev }, 104141d6b093SVladimir Kondratiev .ringid = id, 104241d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 104341d6b093SVladimir Kondratiev }, 104441d6b093SVladimir Kondratiev }; 104541d6b093SVladimir Kondratiev struct { 1046b874ddecSLior David struct wmi_cmd_hdr wmi; 104741d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 104841d6b093SVladimir Kondratiev } __packed reply; 104941d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 105041d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 105141d6b093SVladimir Kondratiev 1052af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 105341d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10549b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 105541d6b093SVladimir Kondratiev 105641d6b093SVladimir Kondratiev if (vring->va) { 105741d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 105841d6b093SVladimir Kondratiev rc = -EINVAL; 105941d6b093SVladimir Kondratiev goto out; 106041d6b093SVladimir Kondratiev } 106141d6b093SVladimir Kondratiev 1062875e9439SMaya Erez wil_tx_data_init(txdata); 106341d6b093SVladimir Kondratiev vring->size = size; 106441d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 106541d6b093SVladimir Kondratiev if (rc) 106641d6b093SVladimir Kondratiev goto out; 106741d6b093SVladimir Kondratiev 106841d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 106941d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 107041d6b093SVladimir Kondratiev 107141d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 107241d6b093SVladimir Kondratiev 1073e00243faSLior David if (!vif->privacy) 1074230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1075e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1076e00243faSLior David &cmd, sizeof(cmd), 107741d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 107841d6b093SVladimir Kondratiev if (rc) 107941d6b093SVladimir Kondratiev goto out_free; 108041d6b093SVladimir Kondratiev 108141d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 108241d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 108341d6b093SVladimir Kondratiev reply.cmd.status); 108441d6b093SVladimir Kondratiev rc = -EINVAL; 108541d6b093SVladimir Kondratiev goto out_free; 108641d6b093SVladimir Kondratiev } 108741d6b093SVladimir Kondratiev 1088dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1089dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1090e00243faSLior David txdata->mid = vif->mid; 109141d6b093SVladimir Kondratiev txdata->enabled = 1; 1092dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 109341d6b093SVladimir Kondratiev 109441d6b093SVladimir Kondratiev return 0; 109541d6b093SVladimir Kondratiev out_free: 1096875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1097230d8442SVladimir Kondratiev txdata->enabled = 0; 1098230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1099875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 110041d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 110141d6b093SVladimir Kondratiev out: 110241d6b093SVladimir Kondratiev 110341d6b093SVladimir Kondratiev return rc; 110441d6b093SVladimir Kondratiev } 110541d6b093SVladimir Kondratiev 11062be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 11072be7d22fSVladimir Kondratiev { 11082be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 11093a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 11102be7d22fSVladimir Kondratiev 11119b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1112097638a0SVladimir Kondratiev 11132be7d22fSVladimir Kondratiev if (!vring->va) 11142be7d22fSVladimir Kondratiev return; 11152be7d22fSVladimir Kondratiev 1116af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 11179cf10d62SVladimir Kondratiev 11185933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1119230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1120e00243faSLior David txdata->mid = U8_MAX; 11215933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 11225933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 112334b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 112434b8886eSMaya Erez * not prevent the next NAPI run. 112534b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 112634b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 112734b8886eSMaya Erez * handle this vring 112834b8886eSMaya Erez */ 112934b8886eSMaya Erez wmb(); 1130097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 11319419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1132097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1133097638a0SVladimir Kondratiev 11342be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 11352be7d22fSVladimir Kondratiev } 11362be7d22fSVladimir Kondratiev 113741d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 1138e00243faSLior David struct wil6210_vif *vif, 11392be7d22fSVladimir Kondratiev struct sk_buff *skb) 11402be7d22fSVladimir Kondratiev { 11413df2cd36SVladimir Kondratiev int i; 11423df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1143e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 11442be7d22fSVladimir Kondratiev 11453df2cd36SVladimir Kondratiev if (cid < 0) 11463df2cd36SVladimir Kondratiev return NULL; 11473df2cd36SVladimir Kondratiev 11483df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 11493df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1150230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1151230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1152230d8442SVladimir Kondratiev continue; 11533df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 11543df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1155b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 11568fe59627SVladimir Kondratiev 1157af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1158af3db60aSLazar Alexei eth->h_dest, i); 1159b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11602be7d22fSVladimir Kondratiev return v; 11613df2cd36SVladimir Kondratiev } else { 1162af3db60aSLazar Alexei wil_dbg_txrx(wil, 1163af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1164af3db60aSLazar Alexei i); 11653df2cd36SVladimir Kondratiev return NULL; 11663df2cd36SVladimir Kondratiev } 11673df2cd36SVladimir Kondratiev } 11683df2cd36SVladimir Kondratiev } 11692be7d22fSVladimir Kondratiev 11702be7d22fSVladimir Kondratiev return NULL; 11712be7d22fSVladimir Kondratiev } 11722be7d22fSVladimir Kondratiev 1173e00243faSLior David static int wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 1174e00243faSLior David struct vring *vring, struct sk_buff *skb); 117554ed90a8SVladimir Kondratiev 117654ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 1177e00243faSLior David struct wil6210_vif *vif, 117854ed90a8SVladimir Kondratiev struct sk_buff *skb) 117954ed90a8SVladimir Kondratiev { 118054ed90a8SVladimir Kondratiev struct vring *v; 118154ed90a8SVladimir Kondratiev int i; 118254ed90a8SVladimir Kondratiev u8 cid; 1183b729aaf0SMaya Erez struct vring_tx_data *txdata; 118454ed90a8SVladimir Kondratiev 118554ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 118654ed90a8SVladimir Kondratiev * for the AP we connected to. 1187230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 118854ed90a8SVladimir Kondratiev */ 118954ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 119054ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1191b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1192e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 119354ed90a8SVladimir Kondratiev continue; 119454ed90a8SVladimir Kondratiev 119554ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 119641d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 119741d6b093SVladimir Kondratiev continue; 119841d6b093SVladimir Kondratiev 1199230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 120054ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1201230d8442SVladimir Kondratiev continue; 120254ed90a8SVladimir Kondratiev 120354ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 120454ed90a8SVladimir Kondratiev 120554ed90a8SVladimir Kondratiev return v; 120654ed90a8SVladimir Kondratiev } 120754ed90a8SVladimir Kondratiev 120854ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 120954ed90a8SVladimir Kondratiev 121054ed90a8SVladimir Kondratiev return NULL; 121154ed90a8SVladimir Kondratiev } 121254ed90a8SVladimir Kondratiev 121370812421SVladimir Kondratiev /* Use one of 2 strategies: 121470812421SVladimir Kondratiev * 121570812421SVladimir Kondratiev * 1. New (real broadcast): 121670812421SVladimir Kondratiev * use dedicated broadcast vring 121770812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 121870812421SVladimir Kondratiev * Find 1-st vring and return it; 121970812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 122070812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 122170812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 122270812421SVladimir Kondratiev * - for PBSS 122370812421SVladimir Kondratiev */ 122470812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1225e00243faSLior David struct wil6210_vif *vif, 1226fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1227fb3cac57SVladimir Kondratiev { 122841d6b093SVladimir Kondratiev struct vring *v; 1229b729aaf0SMaya Erez struct vring_tx_data *txdata; 1230e00243faSLior David int i = vif->bcast_vring; 1231fb3cac57SVladimir Kondratiev 123241d6b093SVladimir Kondratiev if (i < 0) 123341d6b093SVladimir Kondratiev return NULL; 1234fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1235b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1236b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1237fb3cac57SVladimir Kondratiev return NULL; 1238230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1239230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1240230d8442SVladimir Kondratiev return NULL; 1241fb3cac57SVladimir Kondratiev 1242fb3cac57SVladimir Kondratiev return v; 1243fb3cac57SVladimir Kondratiev } 1244fb3cac57SVladimir Kondratiev 124570812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 124670812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 124770812421SVladimir Kondratiev { 124870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 124970812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 125070812421SVladimir Kondratiev 125170812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 125270812421SVladimir Kondratiev } 125370812421SVladimir Kondratiev 125470812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1255e00243faSLior David struct wil6210_vif *vif, 125670812421SVladimir Kondratiev struct sk_buff *skb) 125770812421SVladimir Kondratiev { 125870812421SVladimir Kondratiev struct vring *v, *v2; 125970812421SVladimir Kondratiev struct sk_buff *skb2; 126070812421SVladimir Kondratiev int i; 126170812421SVladimir Kondratiev u8 cid; 126270812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 126370812421SVladimir Kondratiev char *src = eth->h_source; 1264e00243faSLior David struct vring_tx_data *txdata, *txdata2; 126570812421SVladimir Kondratiev 126670812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 126770812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 126870812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1269b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1270e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 127170812421SVladimir Kondratiev continue; 127270812421SVladimir Kondratiev 127370812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 127470812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 127570812421SVladimir Kondratiev continue; 1276230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1277230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 127870812421SVladimir Kondratiev continue; 127970812421SVladimir Kondratiev 128070812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 128170812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 128270812421SVladimir Kondratiev continue; 128370812421SVladimir Kondratiev 128470812421SVladimir Kondratiev goto found; 128570812421SVladimir Kondratiev } 128670812421SVladimir Kondratiev 128770812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 128870812421SVladimir Kondratiev 128970812421SVladimir Kondratiev return NULL; 129070812421SVladimir Kondratiev 129170812421SVladimir Kondratiev found: 129270812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 129370812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 129470812421SVladimir Kondratiev 129570812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 129670812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 129770812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 1298e00243faSLior David txdata2 = &wil->vring_tx_data[i]; 1299e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 130070812421SVladimir Kondratiev continue; 130170812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 130270812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 130370812421SVladimir Kondratiev continue; 1304230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1305230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 130670812421SVladimir Kondratiev continue; 130770812421SVladimir Kondratiev 130870812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 130970812421SVladimir Kondratiev continue; 131070812421SVladimir Kondratiev 131170812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 131270812421SVladimir Kondratiev if (skb2) { 131370812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 131470812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 1315e00243faSLior David wil_tx_vring(wil, vif, v2, skb2); 131670812421SVladimir Kondratiev } else { 131770812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 131870812421SVladimir Kondratiev } 131970812421SVladimir Kondratiev } 132070812421SVladimir Kondratiev 132170812421SVladimir Kondratiev return v; 132270812421SVladimir Kondratiev } 132370812421SVladimir Kondratiev 132499b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 132599b55bd2SKirshenbaum Erez int vring_index) 13262be7d22fSVladimir Kondratiev { 132768ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 13282be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 13292be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 13302be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 13312be7d22fSVladimir Kondratiev d->dma.error = 0; 13322be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 13337e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 133499b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 13352be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 13362be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 13372be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 13382be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 13392be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 13402be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 13412be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 13422be7d22fSVladimir Kondratiev 13432be7d22fSVladimir Kondratiev return 0; 13442be7d22fSVladimir Kondratiev } 13452be7d22fSVladimir Kondratiev 1346c236658fSVladimir Kondratiev static inline 1347c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1348c236658fSVladimir Kondratiev { 13493d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1350c236658fSVladimir Kondratiev } 1351c236658fSVladimir Kondratiev 13523d4bde15SVladimir Kondratiev /** 13533d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13543d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13553d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13563d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13573d4bde15SVladimir Kondratiev */ 13583d4bde15SVladimir Kondratiev 13593d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13603d4bde15SVladimir Kondratiev struct sk_buff *skb, 13613d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13623d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1363504937d4SKirshenbaum Erez { 13643d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13653d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13663d4bde15SVladimir Kondratiev 13673d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13683d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13693d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13703d4bde15SVladimir Kondratiev 13713d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13723d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13733d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13743d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13753d4bde15SVladimir Kondratiev 13763d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13773d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13783d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13793d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13803d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13813d4bde15SVladimir Kondratiev } 13823d4bde15SVladimir Kondratiev 13833d4bde15SVladimir Kondratiev /** 13843d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13853d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13863d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13873d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13883d4bde15SVladimir Kondratiev * 13893d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13903d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13913d4bde15SVladimir Kondratiev */ 13923d4bde15SVladimir Kondratiev 13933d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13943d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1395504937d4SKirshenbaum Erez int protocol; 1396504937d4SKirshenbaum Erez 1397504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1398504937d4SKirshenbaum Erez return 0; 1399504937d4SKirshenbaum Erez 1400df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1401df2d08eeSVladimir Kondratiev 1402504937d4SKirshenbaum Erez switch (skb->protocol) { 1403504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1404504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1405df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1406504937d4SKirshenbaum Erez break; 1407504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1408504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1409504937d4SKirshenbaum Erez break; 1410504937d4SKirshenbaum Erez default: 1411504937d4SKirshenbaum Erez return -EINVAL; 1412504937d4SKirshenbaum Erez } 1413504937d4SKirshenbaum Erez 1414504937d4SKirshenbaum Erez switch (protocol) { 1415504937d4SKirshenbaum Erez case IPPROTO_TCP: 1416504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1417504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1418504937d4SKirshenbaum Erez d->dma.d0 |= 1419504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1420504937d4SKirshenbaum Erez break; 1421504937d4SKirshenbaum Erez case IPPROTO_UDP: 1422504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1423504937d4SKirshenbaum Erez d->dma.d0 |= 1424504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1425504937d4SKirshenbaum Erez break; 1426504937d4SKirshenbaum Erez default: 1427504937d4SKirshenbaum Erez return -EINVAL; 1428504937d4SKirshenbaum Erez } 1429504937d4SKirshenbaum Erez 1430504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1431504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1432504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1433504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1434504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1435504937d4SKirshenbaum Erez 1436504937d4SKirshenbaum Erez return 0; 1437504937d4SKirshenbaum Erez } 1438504937d4SKirshenbaum Erez 14393d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14403d4bde15SVladimir Kondratiev { 14413d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14423d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14433d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14443d4bde15SVladimir Kondratiev } 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14473d4bde15SVladimir Kondratiev { 14483d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14493d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14503d4bde15SVladimir Kondratiev } 14513d4bde15SVladimir Kondratiev 1452e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 1453e00243faSLior David struct vring *vring, struct sk_buff *skb) 14543d4bde15SVladimir Kondratiev { 14553d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14563d4bde15SVladimir Kondratiev 14573d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14583d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14593d4bde15SVladimir Kondratiev *_first_desc = NULL; 14603d4bde15SVladimir Kondratiev 14613d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14623d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14633d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14643d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14653d4bde15SVladimir Kondratiev 14663d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14673d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14683d4bde15SVladimir Kondratiev 14693d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14703d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14713d4bde15SVladimir Kondratiev 14723d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 14733d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 14743d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14753d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14763d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14773d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 14783d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 14793d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 14803d4bde15SVladimir Kondratiev uint i = swhead; 14813d4bde15SVladimir Kondratiev dma_addr_t pa; 14823d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14833d4bde15SVladimir Kondratiev int rem_data = mss; 14843d4bde15SVladimir Kondratiev int lenmss; 14853d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14863d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14873d4bde15SVladimir Kondratiev bool is_ipv4; 14883d4bde15SVladimir Kondratiev int tcp_hdr_len; 14893d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14903d4bde15SVladimir Kondratiev int gso_type; 1491e3d2ed94SHamad Kadmany int rc = -EINVAL; 14923d4bde15SVladimir Kondratiev 1493af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1494af3db60aSLazar Alexei vring_index); 14953d4bde15SVladimir Kondratiev 14963d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14973d4bde15SVladimir Kondratiev return -EINVAL; 14983d4bde15SVladimir Kondratiev 14993d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 15003d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 15013d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 15023d4bde15SVladimir Kondratiev * this is the initial check only. 15033d4bde15SVladimir Kondratiev */ 15043d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 15053d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 15063d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 15073d4bde15SVladimir Kondratiev vring_index, min_desc_required); 15083d4bde15SVladimir Kondratiev return -ENOMEM; 15093d4bde15SVladimir Kondratiev } 15103d4bde15SVladimir Kondratiev 15113d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 15123d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 15133d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 15143d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 15153d4bde15SVladimir Kondratiev 15163d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 15173d4bde15SVladimir Kondratiev switch (gso_type) { 15183d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 15193d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 15203d4bde15SVladimir Kondratiev * as required by the offloading doc 15213d4bde15SVladimir Kondratiev */ 15223d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 15233d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 15243d4bde15SVladimir Kondratiev is_ipv4 = true; 15253d4bde15SVladimir Kondratiev break; 15263d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 15273d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15283d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15293d4bde15SVladimir Kondratiev is_ipv4 = false; 15303d4bde15SVladimir Kondratiev break; 15313d4bde15SVladimir Kondratiev default: 15323d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15333d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15343d4bde15SVladimir Kondratiev */ 15353d4bde15SVladimir Kondratiev return -EINVAL; 15363d4bde15SVladimir Kondratiev } 15373d4bde15SVladimir Kondratiev 15383d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15393d4bde15SVladimir Kondratiev return -EINVAL; 15403d4bde15SVladimir Kondratiev 15413d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15423d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15433d4bde15SVladimir Kondratiev */ 15443d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15453d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15463d4bde15SVladimir Kondratiev 15473d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 15483d4bde15SVladimir Kondratiev 15493d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15503d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15513d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15523d4bde15SVladimir Kondratiev goto err_exit; 15533d4bde15SVladimir Kondratiev } 15543d4bde15SVladimir Kondratiev 15553d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 15563d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15573d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15583d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15593d4bde15SVladimir Kondratiev 15603d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15613d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15623d4bde15SVladimir Kondratiev 15633d4bde15SVladimir Kondratiev descs_used++; 15643d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15653d4bde15SVladimir Kondratiev 15663d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15673d4bde15SVladimir Kondratiev if (headlen) { 15683d4bde15SVladimir Kondratiev len = headlen; 15693d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15703d4bde15SVladimir Kondratiev len); 15713d4bde15SVladimir Kondratiev } else { 15723d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15733d4bde15SVladimir Kondratiev len = frag->size; 15743d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15753d4bde15SVladimir Kondratiev } 15763d4bde15SVladimir Kondratiev 15773d4bde15SVladimir Kondratiev while (len) { 15783d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15793d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15803d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15813d4bde15SVladimir Kondratiev 15823d4bde15SVladimir Kondratiev if (descs_used == avail) { 1583e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1584e3d2ed94SHamad Kadmany rc = -ENOMEM; 1585e3d2ed94SHamad Kadmany goto mem_error; 15863d4bde15SVladimir Kondratiev } 15873d4bde15SVladimir Kondratiev 15883d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15893d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15903d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15913d4bde15SVladimir Kondratiev 15923d4bde15SVladimir Kondratiev if (!headlen) { 15933d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15943d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15953d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15963d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15973d4bde15SVladimir Kondratiev } else { 15983d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15993d4bde15SVladimir Kondratiev skb->data + 16003d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 16013d4bde15SVladimir Kondratiev lenmss, 16023d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 16033d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16043d4bde15SVladimir Kondratiev headlen -= lenmss; 16053d4bde15SVladimir Kondratiev } 16063d4bde15SVladimir Kondratiev 1607e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1608e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1609e3d2ed94SHamad Kadmany goto mem_error; 1610e3d2ed94SHamad Kadmany } 16113d4bde15SVladimir Kondratiev 16123d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 16133d4bde15SVladimir Kondratiev 16143d4bde15SVladimir Kondratiev if (!_first_desc) { 16153d4bde15SVladimir Kondratiev _first_desc = _desc; 16163d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 16173d4bde15SVladimir Kondratiev d = first_desc; 16183d4bde15SVladimir Kondratiev } else { 16193d4bde15SVladimir Kondratiev d = &desc_mem; 16203d4bde15SVladimir Kondratiev } 16213d4bde15SVladimir Kondratiev 16223d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 16233d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 16243d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 16253d4bde15SVladimir Kondratiev skb_net_hdr_len); 16263d4bde15SVladimir Kondratiev 16273d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16283d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16293d4bde15SVladimir Kondratiev 16303d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16313d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16323d4bde15SVladimir Kondratiev len -= lenmss; 16333d4bde15SVladimir Kondratiev rem_data -= lenmss; 16343d4bde15SVladimir Kondratiev 16353d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16363d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16373d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16383d4bde15SVladimir Kondratiev 16393d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16403d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16413d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16423d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16433d4bde15SVladimir Kondratiev * release 16443d4bde15SVladimir Kondratiev */ 16453d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16463d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16473d4bde15SVladimir Kondratiev sg_desc_cnt + 16483d4bde15SVladimir Kondratiev 1); 16493d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16503d4bde15SVladimir Kondratiev } else { 16513d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16523d4bde15SVladimir Kondratiev sg_desc_cnt); 16533d4bde15SVladimir Kondratiev } 16543d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16553d4bde15SVladimir Kondratiev 16563d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16573d4bde15SVladimir Kondratiev 16583d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16593d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16603d4bde15SVladimir Kondratiev * it twice 16613d4bde15SVladimir Kondratiev */ 16623d4bde15SVladimir Kondratiev if (first_desc != d) 16633d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16643d4bde15SVladimir Kondratiev 16653d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16663d4bde15SVladimir Kondratiev * of this TS processing 16673d4bde15SVladimir Kondratiev */ 16683d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16693d4bde15SVladimir Kondratiev *_desc = *d; 16703d4bde15SVladimir Kondratiev 16713d4bde15SVladimir Kondratiev rem_data = mss; 16723d4bde15SVladimir Kondratiev _first_desc = NULL; 16733d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16743d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16753d4bde15SVladimir Kondratiev *_desc = *d; 16763d4bde15SVladimir Kondratiev } 16773d4bde15SVladimir Kondratiev } 16783d4bde15SVladimir Kondratiev 16793d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16803d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16813d4bde15SVladimir Kondratiev */ 16823d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16833d4bde15SVladimir Kondratiev d = first_desc; 16843d4bde15SVladimir Kondratiev 16853d4bde15SVladimir Kondratiev /* Last data descriptor */ 16863d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16873d4bde15SVladimir Kondratiev *_desc = *d; 16883d4bde15SVladimir Kondratiev 16893d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16903d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16913d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16923d4bde15SVladimir Kondratiev 16933d4bde15SVladimir Kondratiev /* hold reference to skb 16943d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16953d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16963d4bde15SVladimir Kondratiev */ 16973d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16983d4bde15SVladimir Kondratiev 16993d4bde15SVladimir Kondratiev /* performance monitoring */ 17003d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 170138d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 17023d4bde15SVladimir Kondratiev used, used + descs_used)) { 17033d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17043d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17053d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 17063d4bde15SVladimir Kondratiev } 17073d4bde15SVladimir Kondratiev 1708eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1709eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1710eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1711eb26cff1SMaya Erez * skb before it was completed. 1712eb26cff1SMaya Erez */ 1713eb26cff1SMaya Erez wmb(); 1714eb26cff1SMaya Erez 17153d4bde15SVladimir Kondratiev /* advance swhead */ 17163d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1717e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 17183d4bde15SVladimir Kondratiev 17193d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17203d4bde15SVladimir Kondratiev * committing them to HW 17213d4bde15SVladimir Kondratiev */ 17223d4bde15SVladimir Kondratiev wmb(); 17233d4bde15SVladimir Kondratiev 1724b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17253d4bde15SVladimir Kondratiev return 0; 17263d4bde15SVladimir Kondratiev 1727e3d2ed94SHamad Kadmany mem_error: 17283d4bde15SVladimir Kondratiev while (descs_used > 0) { 17293d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17303d4bde15SVladimir Kondratiev 1731a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 17323d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 17333d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 17343d4bde15SVladimir Kondratiev *d = *_desc; 17353d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17363d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17373d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 17383d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17393d4bde15SVladimir Kondratiev descs_used--; 17403d4bde15SVladimir Kondratiev } 17413d4bde15SVladimir Kondratiev err_exit: 1742e3d2ed94SHamad Kadmany return rc; 17433d4bde15SVladimir Kondratiev } 17443d4bde15SVladimir Kondratiev 1745e00243faSLior David static int __wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 1746e00243faSLior David struct vring *vring, struct sk_buff *skb) 17472be7d22fSVladimir Kondratiev { 17482be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 174968ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 175068ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17512be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 17522be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 17532be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1754504937d4SKirshenbaum Erez uint f = 0; 17552be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17567c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17572be7d22fSVladimir Kondratiev uint i = swhead; 17582be7d22fSVladimir Kondratiev dma_addr_t pa; 17590436fd9aSVladimir Shulman int used; 1760e00243faSLior David bool mcast = (vring_index == vif->bcast_vring); 176141d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17622be7d22fSVladimir Kondratiev 1763af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring: %d bytes to vring %d\n", skb->len, 1764af3db60aSLazar Alexei vring_index); 17652be7d22fSVladimir Kondratiev 17665933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17675933a06dSVladimir Kondratiev return -EINVAL; 17685933a06dSVladimir Kondratiev 176933c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 177070801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17715b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17725b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 17732be7d22fSVladimir Kondratiev return -ENOMEM; 17742be7d22fSVladimir Kondratiev } 17758fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17762be7d22fSVladimir Kondratiev 17778fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17782be7d22fSVladimir Kondratiev 17795b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 17805b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17817743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17822be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17832be7d22fSVladimir Kondratiev 17842be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17852be7d22fSVladimir Kondratiev return -EINVAL; 17862232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 17872be7d22fSVladimir Kondratiev /* 1-st segment */ 178841d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 178941d6b093SVladimir Kondratiev if (unlikely(mcast)) { 179041d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1791230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 179241d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 179341d6b093SVladimir Kondratiev } 1794504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17953d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17965b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1797504937d4SKirshenbaum Erez vring_index); 1798504937d4SKirshenbaum Erez goto dma_error; 1799504937d4SKirshenbaum Erez } 1800504937d4SKirshenbaum Erez 1801c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 18023d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 180368ada71eSVladimir Kondratiev 18042be7d22fSVladimir Kondratiev /* middle segments */ 1805504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 18062be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 18072be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 18082be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 18098fe59627SVladimir Kondratiev 1810e59d16c0SVladimir Kondratiev *_d = *d; 18115b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 18125b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18135b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18142be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 18158fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 18162be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 18172be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1818e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1819e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1820e3d2ed94SHamad Kadmany vring_index); 18212be7d22fSVladimir Kondratiev goto dma_error; 1822e3d2ed94SHamad Kadmany } 18232232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 182499b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1825c236658fSVladimir Kondratiev /* no need to check return code - 1826c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1827c236658fSVladimir Kondratiev * it will succeed here too 1828c236658fSVladimir Kondratiev */ 18293d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18302be7d22fSVladimir Kondratiev } 18312be7d22fSVladimir Kondratiev /* for the last seg only */ 18322be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1833668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18342be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 183568ada71eSVladimir Kondratiev *_d = *d; 18365b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 18375b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18385b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18392be7d22fSVladimir Kondratiev 18406cdadd4dSVladimir Kondratiev /* hold reference to skb 18416cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18426cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18436cdadd4dSVladimir Kondratiev */ 18446cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 18456cdadd4dSVladimir Kondratiev 18460436fd9aSVladimir Shulman /* performance monitoring */ 18470436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 184838d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 18490436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18507c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18510436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18520436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 18530436fd9aSVladimir Shulman } 18547c0acf86SVladimir Kondratiev 1855eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1856eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1857eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1858eb26cff1SMaya Erez * skb before it was completed. 1859eb26cff1SMaya Erez */ 1860eb26cff1SMaya Erez wmb(); 1861eb26cff1SMaya Erez 18622be7d22fSVladimir Kondratiev /* advance swhead */ 18632be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 18645b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 18655b29c573SVladimir Kondratiev vring->swhead); 186698658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 18673d4bde15SVladimir Kondratiev 18683d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18693d4bde15SVladimir Kondratiev * committing them to HW 18703d4bde15SVladimir Kondratiev */ 18713d4bde15SVladimir Kondratiev wmb(); 18723d4bde15SVladimir Kondratiev 1873b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 18742be7d22fSVladimir Kondratiev 18752be7d22fSVladimir Kondratiev return 0; 18762be7d22fSVladimir Kondratiev dma_error: 18772be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1878c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1879c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1880c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18817e594444SVladimir Kondratiev 18822be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1883c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 18848fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 188568ada71eSVladimir Kondratiev *d = *_d; 188668ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18872232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1888f88f113aSVladimir Kondratiev 1889f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18902be7d22fSVladimir Kondratiev } 18912be7d22fSVladimir Kondratiev 18922be7d22fSVladimir Kondratiev return -EINVAL; 18932be7d22fSVladimir Kondratiev } 18942be7d22fSVladimir Kondratiev 1895e00243faSLior David static int wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 1896e00243faSLior David struct vring *vring, struct sk_buff *skb) 18975933a06dSVladimir Kondratiev { 18985933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 18995933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 19005933a06dSVladimir Kondratiev int rc; 19015933a06dSVladimir Kondratiev 19025933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 19033d4bde15SVladimir Kondratiev 1904fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1905fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1906fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1907fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1908fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1909fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1910fe9ee51eSMaya Erez return -EINVAL; 1911fe9ee51eSMaya Erez } 1912fe9ee51eSMaya Erez 19133d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 1914e00243faSLior David (wil, vif, vring, skb); 19153d4bde15SVladimir Kondratiev 19165933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 19173d4bde15SVladimir Kondratiev 19185933a06dSVladimir Kondratiev return rc; 19195933a06dSVladimir Kondratiev } 19205933a06dSVladimir Kondratiev 1921f9e3033fSDedy Lansky /** 1922f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 19235bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1924f9e3033fSDedy Lansky * 1925f9e3033fSDedy Lansky * This function does one of two checks: 1926f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1927f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1928f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1929f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1930f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1931f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1932f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1933f9e3033fSDedy Lansky * 1934f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1935f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1936f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1937f9e3033fSDedy Lansky */ 1938f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 19395bd60982SLior David struct wil6210_vif *vif, 1940f9e3033fSDedy Lansky struct vring *vring, 1941f9e3033fSDedy Lansky bool check_stop) 1942f9e3033fSDedy Lansky { 1943f9e3033fSDedy Lansky int i; 1944f9e3033fSDedy Lansky 19455bd60982SLior David if (unlikely(!vif)) 19465bd60982SLior David return; 1947f9e3033fSDedy Lansky 19485bd60982SLior David if (vring) 19495bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 19505bd60982SLior David (int)(vring - wil->vring_tx), vif->mid, check_stop, 19515bd60982SLior David vif->net_queue_stopped); 19525bd60982SLior David else 19535bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19545bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19555bd60982SLior David 19565bd60982SLior David if (check_stop == vif->net_queue_stopped) 1957f9e3033fSDedy Lansky /* net queues already in desired state */ 1958f9e3033fSDedy Lansky return; 1959f9e3033fSDedy Lansky 1960f9e3033fSDedy Lansky if (check_stop) { 1961f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1962f9e3033fSDedy Lansky /* not enough room in the vring */ 19635bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19645bd60982SLior David vif->net_queue_stopped = true; 1965f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1966f9e3033fSDedy Lansky } 1967f9e3033fSDedy Lansky return; 1968f9e3033fSDedy Lansky } 1969f9e3033fSDedy Lansky 1970fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1971fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1972fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1973fe9ee51eSMaya Erez return; 1974fe9ee51eSMaya Erez 1975f9e3033fSDedy Lansky /* check wake */ 1976f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1977f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1978f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1979f9e3033fSDedy Lansky 19805bd60982SLior David if (txdata->mid != vif->mid || !cur_vring->va || 19815bd60982SLior David !txdata->enabled || cur_vring == vring) 1982f9e3033fSDedy Lansky continue; 1983f9e3033fSDedy Lansky 1984f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1985f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1986f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1987f9e3033fSDedy Lansky return; 1988f9e3033fSDedy Lansky } 1989f9e3033fSDedy Lansky } 1990f9e3033fSDedy Lansky 1991f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1992f9e3033fSDedy Lansky /* enough room in the vring */ 1993f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 19945bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 19955bd60982SLior David vif->net_queue_stopped = false; 1996f9e3033fSDedy Lansky } 1997f9e3033fSDedy Lansky } 1998f9e3033fSDedy Lansky 19995bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 20005bd60982SLior David struct vring *vring, bool check_stop) 2001f9e3033fSDedy Lansky { 2002f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 20035bd60982SLior David __wil_update_net_queues(wil, vif, vring, check_stop); 2004f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2005f9e3033fSDedy Lansky } 2006f9e3033fSDedy Lansky 20075bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 20085bd60982SLior David struct vring *vring, bool check_stop) 2009f9e3033fSDedy Lansky { 2010f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 20115bd60982SLior David __wil_update_net_queues(wil, vif, vring, check_stop); 2012f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2013f9e3033fSDedy Lansky } 2014f9e3033fSDedy Lansky 20152be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 20162be7d22fSVladimir Kondratiev { 2017e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2018e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 20193df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 202041d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 20212be7d22fSVladimir Kondratiev struct vring *vring; 2022aa27deaaSVladimir Kondratiev static bool pr_once_fw; 20232be7d22fSVladimir Kondratiev int rc; 20242be7d22fSVladimir Kondratiev 2025af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 202633c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2027aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20282be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2029aa27deaaSVladimir Kondratiev pr_once_fw = true; 2030aa27deaaSVladimir Kondratiev } 20312be7d22fSVladimir Kondratiev goto drop; 20322be7d22fSVladimir Kondratiev } 20335bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 20345bd60982SLior David wil_dbg_ratelimited(wil, 20355bd60982SLior David "VIF not connected, packet dropped\n"); 20362be7d22fSVladimir Kondratiev goto drop; 20372be7d22fSVladimir Kondratiev } 2038e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20392be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20402be7d22fSVladimir Kondratiev goto drop; 20412be7d22fSVladimir Kondratiev } 2042aa27deaaSVladimir Kondratiev pr_once_fw = false; 2043d58db4e4SVladimir Kondratiev 20442be7d22fSVladimir Kondratiev /* find vring */ 2045e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2046a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 2047e00243faSLior David vring = wil_find_tx_vring_sta(wil, vif, skb); 2048a895cb8bSLior David } else if (bcast) { 2049e00243faSLior David if (vif->pbss) 2050a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2051a895cb8bSLior David * all stations VRINGs 2052a895cb8bSLior David */ 2053e00243faSLior David vring = wil_find_tx_bcast_2(wil, vif, skb); 2054e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2055a895cb8bSLior David /* AP has a dedicated bcast VRING */ 2056e00243faSLior David vring = wil_find_tx_bcast_1(wil, vif, skb); 2057a895cb8bSLior David else 2058a895cb8bSLior David /* unexpected combination, fallback to duplicating 2059a895cb8bSLior David * the skb in all stations VRINGs 2060a895cb8bSLior David */ 2061e00243faSLior David vring = wil_find_tx_bcast_2(wil, vif, skb); 2062a895cb8bSLior David } else { 2063a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 2064e00243faSLior David vring = wil_find_tx_ucast(wil, vif, skb); 206554ed90a8SVladimir Kondratiev } 206633c477fdSVladimir Kondratiev if (unlikely(!vring)) { 20675aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 20682be7d22fSVladimir Kondratiev goto drop; 20692be7d22fSVladimir Kondratiev } 20702be7d22fSVladimir Kondratiev /* set up vring entry */ 2071e00243faSLior David rc = wil_tx_vring(wil, vif, vring, skb); 2072d58db4e4SVladimir Kondratiev 20732be7d22fSVladimir Kondratiev switch (rc) { 20742be7d22fSVladimir Kondratiev case 0: 2075f9e3033fSDedy Lansky /* shall we stop net queues? */ 20765bd60982SLior David wil_update_net_queues_bh(wil, vif, vring, true); 2077795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20782be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20792be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20802be7d22fSVladimir Kondratiev case -ENOMEM: 20812be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20822be7d22fSVladimir Kondratiev default: 2083afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20842be7d22fSVladimir Kondratiev } 20852be7d22fSVladimir Kondratiev drop: 20862be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20872be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20882be7d22fSVladimir Kondratiev 20892be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20902be7d22fSVladimir Kondratiev } 20912be7d22fSVladimir Kondratiev 2092713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 2093713c8a29SVladimir Kondratiev { 2094713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 2095713c8a29SVladimir Kondratiev 2096713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 2097713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 2098713c8a29SVladimir Kondratiev } 2099713c8a29SVladimir Kondratiev 2100713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 2101713c8a29SVladimir Kondratiev { 2102713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 2103713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 2104713c8a29SVladimir Kondratiev else 2105713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 2106713c8a29SVladimir Kondratiev } 2107713c8a29SVladimir Kondratiev 21082be7d22fSVladimir Kondratiev /** 21092be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 21102be7d22fSVladimir Kondratiev * 2111e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2112e0287c4aSVladimir Kondratiev * 21132be7d22fSVladimir Kondratiev * Safe to call from IRQ 21142be7d22fSVladimir Kondratiev */ 21155bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 21162be7d22fSVladimir Kondratiev { 21175bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 21185bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 21192be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 21202be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 2121097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 2122e0287c4aSVladimir Kondratiev int done = 0; 2123c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 212441d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2125c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 21260436fd9aSVladimir Shulman int used_before_complete; 21270436fd9aSVladimir Shulman int used_new; 21282be7d22fSVladimir Kondratiev 212933c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21302be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2131e0287c4aSVladimir Kondratiev return 0; 21322be7d22fSVladimir Kondratiev } 21332be7d22fSVladimir Kondratiev 213433c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2135097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2136097638a0SVladimir Kondratiev return 0; 2137097638a0SVladimir Kondratiev } 2138097638a0SVladimir Kondratiev 2139af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21402be7d22fSVladimir Kondratiev 21410436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 21420436fd9aSVladimir Shulman 214341d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 214441d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 214541d6b093SVladimir Kondratiev 21462be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 2147c236658fSVladimir Kondratiev int new_swtail; 2148c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2149c236658fSVladimir Kondratiev /** 2150c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21513d4bde15SVladimir Kondratiev * last fragment. look for it. 21523d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2153c236658fSVladimir Kondratiev */ 2154c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2155c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2156c236658fSVladimir Kondratiev 2157c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 215833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2159c236658fSVladimir Kondratiev break; 2160c236658fSVladimir Kondratiev 2161c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2162c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21634de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21647e594444SVladimir Kondratiev u16 dmalen; 216576dfa4b7SVladimir Kondratiev struct sk_buff *skb; 216676dfa4b7SVladimir Kondratiev 216776dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 216876dfa4b7SVladimir Kondratiev skb = ctx->skb; 2169c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 21704de41befSVladimir Kondratiev 217168ada71eSVladimir Kondratiev *d = *_d; 21724de41befSVladimir Kondratiev 21737e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 217498658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 217598658095SVladimir Kondratiev d->dma.error); 21767743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21775b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21785b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21795b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21805b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21812be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21822be7d22fSVladimir Kondratiev 21832232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2184f88f113aSVladimir Kondratiev 21852be7d22fSVladimir Kondratiev if (skb) { 218633c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2187795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2188795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 218941d6b093SVladimir Kondratiev if (stats) { 219041d6b093SVladimir Kondratiev stats->tx_packets++; 2191c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 219241d6b093SVladimir Kondratiev } 2193795ce734SVladimir Kondratiev } else { 2194795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 219541d6b093SVladimir Kondratiev if (stats) 2196c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2197795ce734SVladimir Kondratiev } 2198713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21992be7d22fSVladimir Kondratiev } 2200f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2201eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2202eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2203eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2204eb26cff1SMaya Erez * is completed. 2205eb26cff1SMaya Erez */ 2206eb26cff1SMaya Erez wmb(); 2207c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 220803269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 220903269c65SVladimir Kondratiev * so hardware will not try to process this desc., 221003269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 221103269c65SVladimir Kondratiev */ 22122be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2213e0287c4aSVladimir Kondratiev done++; 22142be7d22fSVladimir Kondratiev } 2215c236658fSVladimir Kondratiev } 221667c3e1b4SVladimir Kondratiev 22170436fd9aSVladimir Shulman /* performance monitoring */ 22180436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 221938d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 22200436fd9aSVladimir Shulman used_new, used_before_complete)) { 22210436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 22220436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 22237c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 22247c0acf86SVladimir Kondratiev } 222567c3e1b4SVladimir Kondratiev 2226f9e3033fSDedy Lansky /* shall we wake net queues? */ 2227f9e3033fSDedy Lansky if (done) 22285bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2229e0287c4aSVladimir Kondratiev 2230e0287c4aSVladimir Kondratiev return done; 22312be7d22fSVladimir Kondratiev } 2232