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); 478e00243faSLior David struct net_device *ndev = wil->main_ndev; 47968ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 48068ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4812be7d22fSVladimir Kondratiev struct sk_buff *skb; 4822be7d22fSVladimir Kondratiev dma_addr_t pa; 483c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 48452a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4857e594444SVladimir Kondratiev u16 dmalen; 4862be7d22fSVladimir Kondratiev u8 ftype; 487c8b78b5fSVladimir Kondratiev int cid; 4883b282bc6SVladimir Kondratiev int i; 489c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 490c8b78b5fSVladimir Kondratiev 49133e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 49233e61169SVladimir Kondratiev 4933b282bc6SVladimir Kondratiev again: 49433c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4952be7d22fSVladimir Kondratiev return NULL; 4962be7d22fSVladimir Kondratiev 4973b282bc6SVladimir Kondratiev i = (int)vring->swhead; 498148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 49933c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 5002be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 5012be7d22fSVladimir Kondratiev return NULL; 5022be7d22fSVladimir Kondratiev } 5032be7d22fSVladimir Kondratiev 504148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 505148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 506148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 507148416a9SVladimir Kondratiev if (!skb) { 508148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 5093b282bc6SVladimir Kondratiev goto again; 510148416a9SVladimir Kondratiev } 51168ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 51268ada71eSVladimir Kondratiev *d = *_d; 51368ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 51468ada71eSVladimir Kondratiev 51568ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 51668ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 51768ada71eSVladimir Kondratiev 518148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 519148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 520a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 52168ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 52268ada71eSVladimir Kondratiev 5233b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 5243b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 5253b282bc6SVladimir Kondratiev 52633c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 527e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5283b282bc6SVladimir Kondratiev stats->rx_large_frame++; 529110dea00SWei Yongjun kfree_skb(skb); 5303b282bc6SVladimir Kondratiev goto again; 531e270045bSVladimir Kondratiev } 5327e594444SVladimir Kondratiev skb_trim(skb, dmalen); 53333e61169SVladimir Kondratiev 5341cbbcb08SVladimir Kondratiev prefetch(skb->data); 5351cbbcb08SVladimir Kondratiev 536c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 537c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 538c0d37713SVladimir Kondratiev 539c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 540c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 541c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5422be7d22fSVladimir Kondratiev 5432be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5442be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 54533e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5462be7d22fSVladimir Kondratiev 5472be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5482be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5492be7d22fSVladimir Kondratiev return skb; 550a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5512be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5522be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5532be7d22fSVladimir Kondratiev */ 55468ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 55533c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 556a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 557a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 558a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 559a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 560a8313341SVladimir Kondratiev 561a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 562a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 563a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5643b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 565a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 566a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 567a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 568a8313341SVladimir Kondratiev mid, cid, tid, seq); 569a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 570a8313341SVladimir Kondratiev } else { 571a8313341SVladimir Kondratiev /* print again all info. One can enable only this 572a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 573a8313341SVladimir Kondratiev */ 574a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 575a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 576a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 577a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 578a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 579a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 580a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 581a8313341SVladimir Kondratiev } 5822be7d22fSVladimir Kondratiev kfree_skb(skb); 5833b282bc6SVladimir Kondratiev goto again; 5842be7d22fSVladimir Kondratiev } 5852be7d22fSVladimir Kondratiev 586c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5872be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5883b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5892be7d22fSVladimir Kondratiev kfree_skb(skb); 5903b282bc6SVladimir Kondratiev goto again; 5912be7d22fSVladimir Kondratiev } 5922be7d22fSVladimir Kondratiev 593504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 594504937d4SKirshenbaum Erez * and in case of error drop the packet 595504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 596504937d4SKirshenbaum Erez */ 59733c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 598504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 59933c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 600504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 6014a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 6024a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 6034a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 6044a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 6054a68ab10SVladimir Kondratiev */ 606504937d4SKirshenbaum Erez } 607504937d4SKirshenbaum Erez 608c406ea7cSVladimir Kondratiev if (snaplen) { 609c406ea7cSVladimir Kondratiev /* Packet layout 610c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 611c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 612c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 613c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 614c406ea7cSVladimir Kondratiev */ 615c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 616c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 617c406ea7cSVladimir Kondratiev } 618c406ea7cSVladimir Kondratiev 6192be7d22fSVladimir Kondratiev return skb; 6202be7d22fSVladimir Kondratiev } 6212be7d22fSVladimir Kondratiev 6222be7d22fSVladimir Kondratiev /** 6232be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 6242be7d22fSVladimir Kondratiev * buffers posted at @swtail 6252be7d22fSVladimir Kondratiev */ 6262be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6272be7d22fSVladimir Kondratiev { 628e00243faSLior David struct net_device *ndev = wil->main_ndev; 6292be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 6302be7d22fSVladimir Kondratiev u32 next_tail; 6312be7d22fSVladimir Kondratiev int rc = 0; 6322be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6332be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6342be7d22fSVladimir Kondratiev 6352be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 6362be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6372be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6382be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 63933c477fdSVladimir Kondratiev if (unlikely(rc)) { 6402be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 6412be7d22fSVladimir Kondratiev rc, v->swtail); 6422be7d22fSVladimir Kondratiev break; 6432be7d22fSVladimir Kondratiev } 6442be7d22fSVladimir Kondratiev } 645ab6d7cc3SMaya Erez 646ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 647ab6d7cc3SMaya Erez * committing them to HW 648ab6d7cc3SMaya Erez */ 649ab6d7cc3SMaya Erez wmb(); 650ab6d7cc3SMaya Erez 651b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6522be7d22fSVladimir Kondratiev 6532be7d22fSVladimir Kondratiev return rc; 6542be7d22fSVladimir Kondratiev } 6552be7d22fSVladimir Kondratiev 65658527421SVladimir Kondratiev /** 65758527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 65858527421SVladimir Kondratiev * @cs: One area of memory 65958527421SVladimir Kondratiev * @ct: Another area of memory 66058527421SVladimir Kondratiev * @count: The size of the area. 66158527421SVladimir Kondratiev * 66258527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 66358527421SVladimir Kondratiev * with minimal modifications 66458527421SVladimir Kondratiev */ 66558527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 66658527421SVladimir Kondratiev { 66758527421SVladimir Kondratiev const unsigned char *su1, *su2; 66858527421SVladimir Kondratiev int res = 0; 66958527421SVladimir Kondratiev 67058527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 67158527421SVladimir Kondratiev --su1, --su2, count--) { 67258527421SVladimir Kondratiev res = *su1 - *su2; 67358527421SVladimir Kondratiev if (res) 67458527421SVladimir Kondratiev break; 67558527421SVladimir Kondratiev } 67658527421SVladimir Kondratiev return res; 67758527421SVladimir Kondratiev } 67858527421SVladimir Kondratiev 67958527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 68058527421SVladimir Kondratiev { 68158527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 68258527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 68358527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 68458527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 68558527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 68658527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 68758527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 68858527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 68958527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 69058527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 69158527421SVladimir Kondratiev 69258527421SVladimir Kondratiev if (!cc->key_set) { 69358527421SVladimir Kondratiev wil_err_ratelimited(wil, 69458527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 69558527421SVladimir Kondratiev cid, tid, mc, key_id); 69658527421SVladimir Kondratiev return -EINVAL; 69758527421SVladimir Kondratiev } 69858527421SVladimir Kondratiev 69958527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 70058527421SVladimir Kondratiev wil_err_ratelimited(wil, 70158527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 70258527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 70358527421SVladimir Kondratiev return -EINVAL; 70458527421SVladimir Kondratiev } 70558527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 70658527421SVladimir Kondratiev 70758527421SVladimir Kondratiev return 0; 70858527421SVladimir Kondratiev } 70958527421SVladimir Kondratiev 7102be7d22fSVladimir Kondratiev /* 7112be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 712e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 7132be7d22fSVladimir Kondratiev */ 714b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 7152be7d22fSVladimir Kondratiev { 716c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 717e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 718c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 719e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 7202be7d22fSVladimir Kondratiev unsigned int len = skb->len; 721c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 72241d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 72358527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 724c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 725c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 726c42da999SVladimir Kondratiev * is not suitable, need to look at data 727c42da999SVladimir Kondratiev */ 728c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 729c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 730c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 731c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 732c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 733c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 734c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 735c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 736c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 737c42da999SVladimir Kondratiev }; 7382be7d22fSVladimir Kondratiev 7390553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7400553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7410553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7420553640dSVladimir Shulman * mechanism, core will be chosen according 7430553640dSVladimir Shulman * to user-level rps configuration. 7440553640dSVladimir Shulman */ 7450553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7460553640dSVladimir Shulman 747241804cbSVladimir Kondratiev skb_orphan(skb); 748241804cbSVladimir Kondratiev 74958527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 75058527421SVladimir Kondratiev rc = GRO_DROP; 75158527421SVladimir Kondratiev dev_kfree_skb(skb); 75258527421SVladimir Kondratiev stats->rx_replay++; 75358527421SVladimir Kondratiev goto stats; 75458527421SVladimir Kondratiev } 75558527421SVladimir Kondratiev 756e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 757c42da999SVladimir Kondratiev if (mcast) { 758c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 759c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 760c42da999SVladimir Kondratiev */ 761c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 762c42da999SVladimir Kondratiev } else { 763e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 764e00243faSLior David eth->h_dest); 7652be7d22fSVladimir Kondratiev 766c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 767c42da999SVladimir Kondratiev /* The destination station is associated to 768c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 769c42da999SVladimir Kondratiev * directly to it and do not pass it to local 770c42da999SVladimir Kondratiev * net stack. 771c42da999SVladimir Kondratiev */ 772c42da999SVladimir Kondratiev xmit_skb = skb; 773c42da999SVladimir Kondratiev skb = NULL; 774c42da999SVladimir Kondratiev } 775c42da999SVladimir Kondratiev } 776c42da999SVladimir Kondratiev } 777c42da999SVladimir Kondratiev if (xmit_skb) { 778c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 779c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 780c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 781c42da999SVladimir Kondratiev */ 782c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 783c42da999SVladimir Kondratiev xmit_skb->priority += 256; 784c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 785c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 786c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 787c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 788c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 789c42da999SVladimir Kondratiev } 790c42da999SVladimir Kondratiev 791c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 792c42da999SVladimir Kondratiev 793c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 794c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 795c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 796c42da999SVladimir Kondratiev len, gro_res_str[rc]); 797c42da999SVladimir Kondratiev } 79858527421SVladimir Kondratiev stats: 799c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 800b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 801b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 802b5998e6aSVladimir Kondratiev stats->rx_dropped++; 803b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 804b5998e6aSVladimir Kondratiev } else { 8052be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 806c8b78b5fSVladimir Kondratiev stats->rx_packets++; 8072be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 808c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 809c42da999SVladimir Kondratiev if (mcast) 810c42da999SVladimir Kondratiev ndev->stats.multicast++; 811194b482bSVladimir Kondratiev } 8122be7d22fSVladimir Kondratiev } 8132be7d22fSVladimir Kondratiev 8142be7d22fSVladimir Kondratiev /** 8152be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 8162be7d22fSVladimir Kondratiev * 817e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8182be7d22fSVladimir Kondratiev */ 819e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8202be7d22fSVladimir Kondratiev { 821e00243faSLior David struct net_device *ndev = wil->main_ndev; 822e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 8232be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 8242be7d22fSVladimir Kondratiev struct sk_buff *skb; 8252be7d22fSVladimir Kondratiev 82633c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8272be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8282be7d22fSVladimir Kondratiev return; 8292be7d22fSVladimir Kondratiev } 830af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 831e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 832e0287c4aSVladimir Kondratiev (*quota)--; 8332be7d22fSVladimir Kondratiev 834e00243faSLior David /* monitor is currently supported on main interface only */ 835e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8362be7d22fSVladimir Kondratiev skb->dev = ndev; 8372be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8382be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8392be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8402be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 841b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8422be7d22fSVladimir Kondratiev } else { 843b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8442be7d22fSVladimir Kondratiev } 8452be7d22fSVladimir Kondratiev } 8462be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8472be7d22fSVladimir Kondratiev } 8482be7d22fSVladimir Kondratiev 84952a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 85052a45702SLior David { 85152a45702SLior David wil->rx_buf_len = rx_large_buf ? 85252a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 85352a45702SLior David if (mtu_max > wil->rx_buf_len) { 85452a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 85552a45702SLior David * backward compatibility (mtu_max parameter was also used 85652a45702SLior David * to support receiving large packets) 85752a45702SLior David */ 85852a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 85952a45702SLior David wil->rx_buf_len = mtu_max; 86052a45702SLior David } 86152a45702SLior David } 86252a45702SLior David 863d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 8642be7d22fSVladimir Kondratiev { 8652be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8662be7d22fSVladimir Kondratiev int rc; 8672be7d22fSVladimir Kondratiev 868af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8699cf10d62SVladimir Kondratiev 8708bf6adb9SVladimir Kondratiev if (vring->va) { 8718bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8728bf6adb9SVladimir Kondratiev return -EINVAL; 8738bf6adb9SVladimir Kondratiev } 8748bf6adb9SVladimir Kondratiev 87552a45702SLior David wil_rx_buf_len_init(wil); 87652a45702SLior David 877d3762b40SVladimir Kondratiev vring->size = size; 8782be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8792be7d22fSVladimir Kondratiev if (rc) 8802be7d22fSVladimir Kondratiev return rc; 8812be7d22fSVladimir Kondratiev 88247e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8832be7d22fSVladimir Kondratiev if (rc) 8842be7d22fSVladimir Kondratiev goto err_free; 8852be7d22fSVladimir Kondratiev 8862be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8872be7d22fSVladimir Kondratiev if (rc) 8882be7d22fSVladimir Kondratiev goto err_free; 8892be7d22fSVladimir Kondratiev 8902be7d22fSVladimir Kondratiev return 0; 8912be7d22fSVladimir Kondratiev err_free: 8922be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8932be7d22fSVladimir Kondratiev 8942be7d22fSVladimir Kondratiev return rc; 8952be7d22fSVladimir Kondratiev } 8962be7d22fSVladimir Kondratiev 8972be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 8982be7d22fSVladimir Kondratiev { 8992be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 9002be7d22fSVladimir Kondratiev 901af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 9029cf10d62SVladimir Kondratiev 9032acb4220SVladimir Kondratiev if (vring->va) 9042be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 9052be7d22fSVladimir Kondratiev } 9062be7d22fSVladimir Kondratiev 907875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 908875e9439SMaya Erez { 909875e9439SMaya Erez spin_lock_bh(&txdata->lock); 910875e9439SMaya Erez txdata->dot1x_open = 0; 911875e9439SMaya Erez txdata->enabled = 0; 912875e9439SMaya Erez txdata->idle = 0; 913875e9439SMaya Erez txdata->last_idle = 0; 914875e9439SMaya Erez txdata->begin = 0; 915875e9439SMaya Erez txdata->agg_wsize = 0; 916875e9439SMaya Erez txdata->agg_timeout = 0; 917875e9439SMaya Erez txdata->agg_amsdu = 0; 918875e9439SMaya Erez txdata->addba_in_progress = false; 919e00243faSLior David txdata->mid = U8_MAX; 920875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 921875e9439SMaya Erez } 922875e9439SMaya Erez 923e00243faSLior David int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9242be7d22fSVladimir Kondratiev int cid, int tid) 9252be7d22fSVladimir Kondratiev { 926e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9272be7d22fSVladimir Kondratiev int rc; 9282be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9292be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9302be7d22fSVladimir Kondratiev .vring_cfg = { 9312be7d22fSVladimir Kondratiev .tx_sw_ring = { 9329a06bec9SVladimir Kondratiev .max_mpdu_size = 933c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 934b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9352be7d22fSVladimir Kondratiev }, 9362be7d22fSVladimir Kondratiev .ringid = id, 937a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9382be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9392be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9402be7d22fSVladimir Kondratiev .to_resolution = 0, 9413277213fSVladimir Kondratiev .agg_max_wsize = 0, 9422be7d22fSVladimir Kondratiev .schd_params = { 9432be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9442be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9452be7d22fSVladimir Kondratiev }, 9462be7d22fSVladimir Kondratiev }, 9472be7d22fSVladimir Kondratiev }; 9482be7d22fSVladimir Kondratiev struct { 949b874ddecSLior David struct wmi_cmd_hdr wmi; 9502be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 9512be7d22fSVladimir Kondratiev } __packed reply; 9522be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 953097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9542be7d22fSVladimir Kondratiev 955af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 956e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9579b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9589cf10d62SVladimir Kondratiev 9592be7d22fSVladimir Kondratiev if (vring->va) { 9602be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9612be7d22fSVladimir Kondratiev rc = -EINVAL; 9622be7d22fSVladimir Kondratiev goto out; 9632be7d22fSVladimir Kondratiev } 9642be7d22fSVladimir Kondratiev 965875e9439SMaya Erez wil_tx_data_init(txdata); 9662be7d22fSVladimir Kondratiev vring->size = size; 9672be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9682be7d22fSVladimir Kondratiev if (rc) 9692be7d22fSVladimir Kondratiev goto out; 9702be7d22fSVladimir Kondratiev 97193ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 97293ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 97393ae6d49SVladimir Kondratiev 9742be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9752be7d22fSVladimir Kondratiev 976e00243faSLior David if (!vif->privacy) 977230d8442SVladimir Kondratiev txdata->dot1x_open = true; 978e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9792be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9802be7d22fSVladimir Kondratiev if (rc) 9812be7d22fSVladimir Kondratiev goto out_free; 9822be7d22fSVladimir Kondratiev 983b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9842be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9852be7d22fSVladimir Kondratiev reply.cmd.status); 986c331997bSVladimir Kondratiev rc = -EINVAL; 9872be7d22fSVladimir Kondratiev goto out_free; 9882be7d22fSVladimir Kondratiev } 9892be7d22fSVladimir Kondratiev 990dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 991dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 992e00243faSLior David txdata->mid = vif->mid; 993097638a0SVladimir Kondratiev txdata->enabled = 1; 994dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 995dc90506fSMaya Erez 996230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9973a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 998097638a0SVladimir Kondratiev 9992be7d22fSVladimir Kondratiev return 0; 10002be7d22fSVladimir Kondratiev out_free: 1001875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1002230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1003230d8442SVladimir Kondratiev txdata->enabled = 0; 1004875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 10052be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 10060916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 10070916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 10080916d9f2SMaya Erez 10092be7d22fSVladimir Kondratiev out: 10102be7d22fSVladimir Kondratiev 10112be7d22fSVladimir Kondratiev return rc; 10122be7d22fSVladimir Kondratiev } 10132be7d22fSVladimir Kondratiev 1014e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 101541d6b093SVladimir Kondratiev { 1016e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 101741d6b093SVladimir Kondratiev int rc; 101841d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 101941d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 102041d6b093SVladimir Kondratiev .vring_cfg = { 102141d6b093SVladimir Kondratiev .tx_sw_ring = { 102241d6b093SVladimir Kondratiev .max_mpdu_size = 102341d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 102441d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 102541d6b093SVladimir Kondratiev }, 102641d6b093SVladimir Kondratiev .ringid = id, 102741d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 102841d6b093SVladimir Kondratiev }, 102941d6b093SVladimir Kondratiev }; 103041d6b093SVladimir Kondratiev struct { 1031b874ddecSLior David struct wmi_cmd_hdr wmi; 103241d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 103341d6b093SVladimir Kondratiev } __packed reply; 103441d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 103541d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 103641d6b093SVladimir Kondratiev 1037af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 103841d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10399b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 104041d6b093SVladimir Kondratiev 104141d6b093SVladimir Kondratiev if (vring->va) { 104241d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 104341d6b093SVladimir Kondratiev rc = -EINVAL; 104441d6b093SVladimir Kondratiev goto out; 104541d6b093SVladimir Kondratiev } 104641d6b093SVladimir Kondratiev 1047875e9439SMaya Erez wil_tx_data_init(txdata); 104841d6b093SVladimir Kondratiev vring->size = size; 104941d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 105041d6b093SVladimir Kondratiev if (rc) 105141d6b093SVladimir Kondratiev goto out; 105241d6b093SVladimir Kondratiev 105341d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 105441d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 105541d6b093SVladimir Kondratiev 105641d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 105741d6b093SVladimir Kondratiev 1058e00243faSLior David if (!vif->privacy) 1059230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1060e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1061e00243faSLior David &cmd, sizeof(cmd), 106241d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 106341d6b093SVladimir Kondratiev if (rc) 106441d6b093SVladimir Kondratiev goto out_free; 106541d6b093SVladimir Kondratiev 106641d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 106741d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 106841d6b093SVladimir Kondratiev reply.cmd.status); 106941d6b093SVladimir Kondratiev rc = -EINVAL; 107041d6b093SVladimir Kondratiev goto out_free; 107141d6b093SVladimir Kondratiev } 107241d6b093SVladimir Kondratiev 1073dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1074dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1075e00243faSLior David txdata->mid = vif->mid; 107641d6b093SVladimir Kondratiev txdata->enabled = 1; 1077dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 107841d6b093SVladimir Kondratiev 107941d6b093SVladimir Kondratiev return 0; 108041d6b093SVladimir Kondratiev out_free: 1081875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1082230d8442SVladimir Kondratiev txdata->enabled = 0; 1083230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1084875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 108541d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 108641d6b093SVladimir Kondratiev out: 108741d6b093SVladimir Kondratiev 108841d6b093SVladimir Kondratiev return rc; 108941d6b093SVladimir Kondratiev } 109041d6b093SVladimir Kondratiev 10912be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 10922be7d22fSVladimir Kondratiev { 10932be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 10943a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 10952be7d22fSVladimir Kondratiev 10969b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1097097638a0SVladimir Kondratiev 10982be7d22fSVladimir Kondratiev if (!vring->va) 10992be7d22fSVladimir Kondratiev return; 11002be7d22fSVladimir Kondratiev 1101af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 11029cf10d62SVladimir Kondratiev 11035933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1104230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1105e00243faSLior David txdata->mid = U8_MAX; 11065933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 11075933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 110834b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 110934b8886eSMaya Erez * not prevent the next NAPI run. 111034b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 111134b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 111234b8886eSMaya Erez * handle this vring 111334b8886eSMaya Erez */ 111434b8886eSMaya Erez wmb(); 1115097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 11169419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1117097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1118097638a0SVladimir Kondratiev 11192be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 11202be7d22fSVladimir Kondratiev } 11212be7d22fSVladimir Kondratiev 112241d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 1123e00243faSLior David struct wil6210_vif *vif, 11242be7d22fSVladimir Kondratiev struct sk_buff *skb) 11252be7d22fSVladimir Kondratiev { 11263df2cd36SVladimir Kondratiev int i; 11273df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1128e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 11292be7d22fSVladimir Kondratiev 11303df2cd36SVladimir Kondratiev if (cid < 0) 11313df2cd36SVladimir Kondratiev return NULL; 11323df2cd36SVladimir Kondratiev 11333df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 11343df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1135230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1136230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1137230d8442SVladimir Kondratiev continue; 11383df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 11393df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1140b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 11418fe59627SVladimir Kondratiev 1142af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1143af3db60aSLazar Alexei eth->h_dest, i); 1144b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11452be7d22fSVladimir Kondratiev return v; 11463df2cd36SVladimir Kondratiev } else { 1147af3db60aSLazar Alexei wil_dbg_txrx(wil, 1148af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1149af3db60aSLazar Alexei i); 11503df2cd36SVladimir Kondratiev return NULL; 11513df2cd36SVladimir Kondratiev } 11523df2cd36SVladimir Kondratiev } 11533df2cd36SVladimir Kondratiev } 11542be7d22fSVladimir Kondratiev 11552be7d22fSVladimir Kondratiev return NULL; 11562be7d22fSVladimir Kondratiev } 11572be7d22fSVladimir Kondratiev 1158e00243faSLior David static int wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 1159e00243faSLior David struct vring *vring, struct sk_buff *skb); 116054ed90a8SVladimir Kondratiev 116154ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 1162e00243faSLior David struct wil6210_vif *vif, 116354ed90a8SVladimir Kondratiev struct sk_buff *skb) 116454ed90a8SVladimir Kondratiev { 116554ed90a8SVladimir Kondratiev struct vring *v; 116654ed90a8SVladimir Kondratiev int i; 116754ed90a8SVladimir Kondratiev u8 cid; 1168b729aaf0SMaya Erez struct vring_tx_data *txdata; 116954ed90a8SVladimir Kondratiev 117054ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 117154ed90a8SVladimir Kondratiev * for the AP we connected to. 1172230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 117354ed90a8SVladimir Kondratiev */ 117454ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 117554ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1176b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1177e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 117854ed90a8SVladimir Kondratiev continue; 117954ed90a8SVladimir Kondratiev 118054ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 118141d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 118241d6b093SVladimir Kondratiev continue; 118341d6b093SVladimir Kondratiev 1184230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 118554ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1186230d8442SVladimir Kondratiev continue; 118754ed90a8SVladimir Kondratiev 118854ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 118954ed90a8SVladimir Kondratiev 119054ed90a8SVladimir Kondratiev return v; 119154ed90a8SVladimir Kondratiev } 119254ed90a8SVladimir Kondratiev 119354ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 119454ed90a8SVladimir Kondratiev 119554ed90a8SVladimir Kondratiev return NULL; 119654ed90a8SVladimir Kondratiev } 119754ed90a8SVladimir Kondratiev 119870812421SVladimir Kondratiev /* Use one of 2 strategies: 119970812421SVladimir Kondratiev * 120070812421SVladimir Kondratiev * 1. New (real broadcast): 120170812421SVladimir Kondratiev * use dedicated broadcast vring 120270812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 120370812421SVladimir Kondratiev * Find 1-st vring and return it; 120470812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 120570812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 120670812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 120770812421SVladimir Kondratiev * - for PBSS 120870812421SVladimir Kondratiev */ 120970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1210e00243faSLior David struct wil6210_vif *vif, 1211fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1212fb3cac57SVladimir Kondratiev { 121341d6b093SVladimir Kondratiev struct vring *v; 1214b729aaf0SMaya Erez struct vring_tx_data *txdata; 1215e00243faSLior David int i = vif->bcast_vring; 1216fb3cac57SVladimir Kondratiev 121741d6b093SVladimir Kondratiev if (i < 0) 121841d6b093SVladimir Kondratiev return NULL; 1219fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1220b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1221b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1222fb3cac57SVladimir Kondratiev return NULL; 1223230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1224230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1225230d8442SVladimir Kondratiev return NULL; 1226fb3cac57SVladimir Kondratiev 1227fb3cac57SVladimir Kondratiev return v; 1228fb3cac57SVladimir Kondratiev } 1229fb3cac57SVladimir Kondratiev 123070812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 123170812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 123270812421SVladimir Kondratiev { 123370812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 123470812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 123570812421SVladimir Kondratiev 123670812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 123770812421SVladimir Kondratiev } 123870812421SVladimir Kondratiev 123970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1240e00243faSLior David struct wil6210_vif *vif, 124170812421SVladimir Kondratiev struct sk_buff *skb) 124270812421SVladimir Kondratiev { 124370812421SVladimir Kondratiev struct vring *v, *v2; 124470812421SVladimir Kondratiev struct sk_buff *skb2; 124570812421SVladimir Kondratiev int i; 124670812421SVladimir Kondratiev u8 cid; 124770812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 124870812421SVladimir Kondratiev char *src = eth->h_source; 1249e00243faSLior David struct vring_tx_data *txdata, *txdata2; 125070812421SVladimir Kondratiev 125170812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 125270812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 125370812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1254b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1255e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 125670812421SVladimir Kondratiev continue; 125770812421SVladimir Kondratiev 125870812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 125970812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 126070812421SVladimir Kondratiev continue; 1261230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1262230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 126370812421SVladimir Kondratiev continue; 126470812421SVladimir Kondratiev 126570812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 126670812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 126770812421SVladimir Kondratiev continue; 126870812421SVladimir Kondratiev 126970812421SVladimir Kondratiev goto found; 127070812421SVladimir Kondratiev } 127170812421SVladimir Kondratiev 127270812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 127370812421SVladimir Kondratiev 127470812421SVladimir Kondratiev return NULL; 127570812421SVladimir Kondratiev 127670812421SVladimir Kondratiev found: 127770812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 127870812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 127970812421SVladimir Kondratiev 128070812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 128170812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 128270812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 1283e00243faSLior David txdata2 = &wil->vring_tx_data[i]; 1284e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 128570812421SVladimir Kondratiev continue; 128670812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 128770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 128870812421SVladimir Kondratiev continue; 1289230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1290230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 129170812421SVladimir Kondratiev continue; 129270812421SVladimir Kondratiev 129370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 129470812421SVladimir Kondratiev continue; 129570812421SVladimir Kondratiev 129670812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 129770812421SVladimir Kondratiev if (skb2) { 129870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 129970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 1300e00243faSLior David wil_tx_vring(wil, vif, v2, skb2); 130170812421SVladimir Kondratiev } else { 130270812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 130370812421SVladimir Kondratiev } 130470812421SVladimir Kondratiev } 130570812421SVladimir Kondratiev 130670812421SVladimir Kondratiev return v; 130770812421SVladimir Kondratiev } 130870812421SVladimir Kondratiev 130999b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 131099b55bd2SKirshenbaum Erez int vring_index) 13112be7d22fSVladimir Kondratiev { 131268ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 13132be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 13142be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 13152be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 13162be7d22fSVladimir Kondratiev d->dma.error = 0; 13172be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 13187e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 131999b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 13202be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 13212be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 13222be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 13232be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 13242be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 13252be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 13262be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 13272be7d22fSVladimir Kondratiev 13282be7d22fSVladimir Kondratiev return 0; 13292be7d22fSVladimir Kondratiev } 13302be7d22fSVladimir Kondratiev 1331c236658fSVladimir Kondratiev static inline 1332c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1333c236658fSVladimir Kondratiev { 13343d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1335c236658fSVladimir Kondratiev } 1336c236658fSVladimir Kondratiev 13373d4bde15SVladimir Kondratiev /** 13383d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13393d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13403d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13413d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13423d4bde15SVladimir Kondratiev */ 13433d4bde15SVladimir Kondratiev 13443d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13453d4bde15SVladimir Kondratiev struct sk_buff *skb, 13463d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13473d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1348504937d4SKirshenbaum Erez { 13493d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13503d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13513d4bde15SVladimir Kondratiev 13523d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13533d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13543d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13553d4bde15SVladimir Kondratiev 13563d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13573d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13583d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13593d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13603d4bde15SVladimir Kondratiev 13613d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13623d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13633d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13643d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13653d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13663d4bde15SVladimir Kondratiev } 13673d4bde15SVladimir Kondratiev 13683d4bde15SVladimir Kondratiev /** 13693d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13703d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13713d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13723d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13733d4bde15SVladimir Kondratiev * 13743d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13753d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13763d4bde15SVladimir Kondratiev */ 13773d4bde15SVladimir Kondratiev 13783d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13793d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1380504937d4SKirshenbaum Erez int protocol; 1381504937d4SKirshenbaum Erez 1382504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1383504937d4SKirshenbaum Erez return 0; 1384504937d4SKirshenbaum Erez 1385df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1386df2d08eeSVladimir Kondratiev 1387504937d4SKirshenbaum Erez switch (skb->protocol) { 1388504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1389504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1390df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1391504937d4SKirshenbaum Erez break; 1392504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1393504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1394504937d4SKirshenbaum Erez break; 1395504937d4SKirshenbaum Erez default: 1396504937d4SKirshenbaum Erez return -EINVAL; 1397504937d4SKirshenbaum Erez } 1398504937d4SKirshenbaum Erez 1399504937d4SKirshenbaum Erez switch (protocol) { 1400504937d4SKirshenbaum Erez case IPPROTO_TCP: 1401504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1402504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1403504937d4SKirshenbaum Erez d->dma.d0 |= 1404504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1405504937d4SKirshenbaum Erez break; 1406504937d4SKirshenbaum Erez case IPPROTO_UDP: 1407504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1408504937d4SKirshenbaum Erez d->dma.d0 |= 1409504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1410504937d4SKirshenbaum Erez break; 1411504937d4SKirshenbaum Erez default: 1412504937d4SKirshenbaum Erez return -EINVAL; 1413504937d4SKirshenbaum Erez } 1414504937d4SKirshenbaum Erez 1415504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1416504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1417504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1418504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1419504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1420504937d4SKirshenbaum Erez 1421504937d4SKirshenbaum Erez return 0; 1422504937d4SKirshenbaum Erez } 1423504937d4SKirshenbaum Erez 14243d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14253d4bde15SVladimir Kondratiev { 14263d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14273d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14283d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14293d4bde15SVladimir Kondratiev } 14303d4bde15SVladimir Kondratiev 14313d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14323d4bde15SVladimir Kondratiev { 14333d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14343d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14353d4bde15SVladimir Kondratiev } 14363d4bde15SVladimir Kondratiev 1437e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 1438e00243faSLior David struct vring *vring, struct sk_buff *skb) 14393d4bde15SVladimir Kondratiev { 14403d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14413d4bde15SVladimir Kondratiev 14423d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14433d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14443d4bde15SVladimir Kondratiev *_first_desc = NULL; 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14473d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14483d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14493d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14503d4bde15SVladimir Kondratiev 14513d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14523d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14533d4bde15SVladimir Kondratiev 14543d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14553d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14563d4bde15SVladimir Kondratiev 14573d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 14583d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 14593d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14603d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14613d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14623d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 14633d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 14643d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 14653d4bde15SVladimir Kondratiev uint i = swhead; 14663d4bde15SVladimir Kondratiev dma_addr_t pa; 14673d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14683d4bde15SVladimir Kondratiev int rem_data = mss; 14693d4bde15SVladimir Kondratiev int lenmss; 14703d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14713d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14723d4bde15SVladimir Kondratiev bool is_ipv4; 14733d4bde15SVladimir Kondratiev int tcp_hdr_len; 14743d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14753d4bde15SVladimir Kondratiev int gso_type; 1476e3d2ed94SHamad Kadmany int rc = -EINVAL; 14773d4bde15SVladimir Kondratiev 1478af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1479af3db60aSLazar Alexei vring_index); 14803d4bde15SVladimir Kondratiev 14813d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14823d4bde15SVladimir Kondratiev return -EINVAL; 14833d4bde15SVladimir Kondratiev 14843d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14853d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14863d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14873d4bde15SVladimir Kondratiev * this is the initial check only. 14883d4bde15SVladimir Kondratiev */ 14893d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14903d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14913d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14923d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14933d4bde15SVladimir Kondratiev return -ENOMEM; 14943d4bde15SVladimir Kondratiev } 14953d4bde15SVladimir Kondratiev 14963d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14973d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14983d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14993d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 15003d4bde15SVladimir Kondratiev 15013d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 15023d4bde15SVladimir Kondratiev switch (gso_type) { 15033d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 15043d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 15053d4bde15SVladimir Kondratiev * as required by the offloading doc 15063d4bde15SVladimir Kondratiev */ 15073d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 15083d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 15093d4bde15SVladimir Kondratiev is_ipv4 = true; 15103d4bde15SVladimir Kondratiev break; 15113d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 15123d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15133d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15143d4bde15SVladimir Kondratiev is_ipv4 = false; 15153d4bde15SVladimir Kondratiev break; 15163d4bde15SVladimir Kondratiev default: 15173d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15183d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15193d4bde15SVladimir Kondratiev */ 15203d4bde15SVladimir Kondratiev return -EINVAL; 15213d4bde15SVladimir Kondratiev } 15223d4bde15SVladimir Kondratiev 15233d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15243d4bde15SVladimir Kondratiev return -EINVAL; 15253d4bde15SVladimir Kondratiev 15263d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15273d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15283d4bde15SVladimir Kondratiev */ 15293d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15303d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15313d4bde15SVladimir Kondratiev 15323d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 15333d4bde15SVladimir Kondratiev 15343d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15353d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15363d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15373d4bde15SVladimir Kondratiev goto err_exit; 15383d4bde15SVladimir Kondratiev } 15393d4bde15SVladimir Kondratiev 15403d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 15413d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15423d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15433d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15443d4bde15SVladimir Kondratiev 15453d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15463d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15473d4bde15SVladimir Kondratiev 15483d4bde15SVladimir Kondratiev descs_used++; 15493d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15503d4bde15SVladimir Kondratiev 15513d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15523d4bde15SVladimir Kondratiev if (headlen) { 15533d4bde15SVladimir Kondratiev len = headlen; 15543d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15553d4bde15SVladimir Kondratiev len); 15563d4bde15SVladimir Kondratiev } else { 15573d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15583d4bde15SVladimir Kondratiev len = frag->size; 15593d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15603d4bde15SVladimir Kondratiev } 15613d4bde15SVladimir Kondratiev 15623d4bde15SVladimir Kondratiev while (len) { 15633d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15643d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15653d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15663d4bde15SVladimir Kondratiev 15673d4bde15SVladimir Kondratiev if (descs_used == avail) { 1568e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1569e3d2ed94SHamad Kadmany rc = -ENOMEM; 1570e3d2ed94SHamad Kadmany goto mem_error; 15713d4bde15SVladimir Kondratiev } 15723d4bde15SVladimir Kondratiev 15733d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15743d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15753d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15763d4bde15SVladimir Kondratiev 15773d4bde15SVladimir Kondratiev if (!headlen) { 15783d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15793d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15803d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15813d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15823d4bde15SVladimir Kondratiev } else { 15833d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15843d4bde15SVladimir Kondratiev skb->data + 15853d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15863d4bde15SVladimir Kondratiev lenmss, 15873d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15883d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15893d4bde15SVladimir Kondratiev headlen -= lenmss; 15903d4bde15SVladimir Kondratiev } 15913d4bde15SVladimir Kondratiev 1592e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1593e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1594e3d2ed94SHamad Kadmany goto mem_error; 1595e3d2ed94SHamad Kadmany } 15963d4bde15SVladimir Kondratiev 15973d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15983d4bde15SVladimir Kondratiev 15993d4bde15SVladimir Kondratiev if (!_first_desc) { 16003d4bde15SVladimir Kondratiev _first_desc = _desc; 16013d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 16023d4bde15SVladimir Kondratiev d = first_desc; 16033d4bde15SVladimir Kondratiev } else { 16043d4bde15SVladimir Kondratiev d = &desc_mem; 16053d4bde15SVladimir Kondratiev } 16063d4bde15SVladimir Kondratiev 16073d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 16083d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 16093d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 16103d4bde15SVladimir Kondratiev skb_net_hdr_len); 16113d4bde15SVladimir Kondratiev 16123d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16133d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16143d4bde15SVladimir Kondratiev 16153d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16163d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16173d4bde15SVladimir Kondratiev len -= lenmss; 16183d4bde15SVladimir Kondratiev rem_data -= lenmss; 16193d4bde15SVladimir Kondratiev 16203d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16213d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16223d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16233d4bde15SVladimir Kondratiev 16243d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16253d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16263d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16273d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16283d4bde15SVladimir Kondratiev * release 16293d4bde15SVladimir Kondratiev */ 16303d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16313d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16323d4bde15SVladimir Kondratiev sg_desc_cnt + 16333d4bde15SVladimir Kondratiev 1); 16343d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16353d4bde15SVladimir Kondratiev } else { 16363d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16373d4bde15SVladimir Kondratiev sg_desc_cnt); 16383d4bde15SVladimir Kondratiev } 16393d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16403d4bde15SVladimir Kondratiev 16413d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16423d4bde15SVladimir Kondratiev 16433d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16443d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16453d4bde15SVladimir Kondratiev * it twice 16463d4bde15SVladimir Kondratiev */ 16473d4bde15SVladimir Kondratiev if (first_desc != d) 16483d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16493d4bde15SVladimir Kondratiev 16503d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16513d4bde15SVladimir Kondratiev * of this TS processing 16523d4bde15SVladimir Kondratiev */ 16533d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16543d4bde15SVladimir Kondratiev *_desc = *d; 16553d4bde15SVladimir Kondratiev 16563d4bde15SVladimir Kondratiev rem_data = mss; 16573d4bde15SVladimir Kondratiev _first_desc = NULL; 16583d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16593d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16603d4bde15SVladimir Kondratiev *_desc = *d; 16613d4bde15SVladimir Kondratiev } 16623d4bde15SVladimir Kondratiev } 16633d4bde15SVladimir Kondratiev 16643d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16653d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16663d4bde15SVladimir Kondratiev */ 16673d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16683d4bde15SVladimir Kondratiev d = first_desc; 16693d4bde15SVladimir Kondratiev 16703d4bde15SVladimir Kondratiev /* Last data descriptor */ 16713d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16723d4bde15SVladimir Kondratiev *_desc = *d; 16733d4bde15SVladimir Kondratiev 16743d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16753d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16763d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16773d4bde15SVladimir Kondratiev 16783d4bde15SVladimir Kondratiev /* hold reference to skb 16793d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16803d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16813d4bde15SVladimir Kondratiev */ 16823d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16833d4bde15SVladimir Kondratiev 16843d4bde15SVladimir Kondratiev /* performance monitoring */ 16853d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 168638d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 16873d4bde15SVladimir Kondratiev used, used + descs_used)) { 16883d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16893d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16903d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16913d4bde15SVladimir Kondratiev } 16923d4bde15SVladimir Kondratiev 1693eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1694eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1695eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1696eb26cff1SMaya Erez * skb before it was completed. 1697eb26cff1SMaya Erez */ 1698eb26cff1SMaya Erez wmb(); 1699eb26cff1SMaya Erez 17003d4bde15SVladimir Kondratiev /* advance swhead */ 17013d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1702e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 17033d4bde15SVladimir Kondratiev 17043d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17053d4bde15SVladimir Kondratiev * committing them to HW 17063d4bde15SVladimir Kondratiev */ 17073d4bde15SVladimir Kondratiev wmb(); 17083d4bde15SVladimir Kondratiev 1709b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17103d4bde15SVladimir Kondratiev return 0; 17113d4bde15SVladimir Kondratiev 1712e3d2ed94SHamad Kadmany mem_error: 17133d4bde15SVladimir Kondratiev while (descs_used > 0) { 17143d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17153d4bde15SVladimir Kondratiev 1716a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 17173d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 17183d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 17193d4bde15SVladimir Kondratiev *d = *_desc; 17203d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17213d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17223d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 17233d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17243d4bde15SVladimir Kondratiev descs_used--; 17253d4bde15SVladimir Kondratiev } 17263d4bde15SVladimir Kondratiev err_exit: 1727e3d2ed94SHamad Kadmany return rc; 17283d4bde15SVladimir Kondratiev } 17293d4bde15SVladimir Kondratiev 1730e00243faSLior David static int __wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 1731e00243faSLior David struct vring *vring, struct sk_buff *skb) 17322be7d22fSVladimir Kondratiev { 17332be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 173468ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 173568ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17362be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 17372be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 17382be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1739504937d4SKirshenbaum Erez uint f = 0; 17402be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17417c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17422be7d22fSVladimir Kondratiev uint i = swhead; 17432be7d22fSVladimir Kondratiev dma_addr_t pa; 17440436fd9aSVladimir Shulman int used; 1745e00243faSLior David bool mcast = (vring_index == vif->bcast_vring); 174641d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17472be7d22fSVladimir Kondratiev 1748af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring: %d bytes to vring %d\n", skb->len, 1749af3db60aSLazar Alexei vring_index); 17502be7d22fSVladimir Kondratiev 17515933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17525933a06dSVladimir Kondratiev return -EINVAL; 17535933a06dSVladimir Kondratiev 175433c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 175570801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17565b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17575b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 17582be7d22fSVladimir Kondratiev return -ENOMEM; 17592be7d22fSVladimir Kondratiev } 17608fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17612be7d22fSVladimir Kondratiev 17628fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17632be7d22fSVladimir Kondratiev 17645b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 17655b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17667743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17672be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17682be7d22fSVladimir Kondratiev 17692be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17702be7d22fSVladimir Kondratiev return -EINVAL; 17712232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 17722be7d22fSVladimir Kondratiev /* 1-st segment */ 177341d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 177441d6b093SVladimir Kondratiev if (unlikely(mcast)) { 177541d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1776230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 177741d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 177841d6b093SVladimir Kondratiev } 1779504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17803d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17815b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1782504937d4SKirshenbaum Erez vring_index); 1783504937d4SKirshenbaum Erez goto dma_error; 1784504937d4SKirshenbaum Erez } 1785504937d4SKirshenbaum Erez 1786c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 17873d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 178868ada71eSVladimir Kondratiev 17892be7d22fSVladimir Kondratiev /* middle segments */ 1790504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17912be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17922be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17932be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17948fe59627SVladimir Kondratiev 1795e59d16c0SVladimir Kondratiev *_d = *d; 17965b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17975b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17985b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17992be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 18008fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 18012be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 18022be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1803e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1804e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1805e3d2ed94SHamad Kadmany vring_index); 18062be7d22fSVladimir Kondratiev goto dma_error; 1807e3d2ed94SHamad Kadmany } 18082232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 180999b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1810c236658fSVladimir Kondratiev /* no need to check return code - 1811c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1812c236658fSVladimir Kondratiev * it will succeed here too 1813c236658fSVladimir Kondratiev */ 18143d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18152be7d22fSVladimir Kondratiev } 18162be7d22fSVladimir Kondratiev /* for the last seg only */ 18172be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1818668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18192be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 182068ada71eSVladimir Kondratiev *_d = *d; 18215b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 18225b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18235b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18242be7d22fSVladimir Kondratiev 18256cdadd4dSVladimir Kondratiev /* hold reference to skb 18266cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18276cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18286cdadd4dSVladimir Kondratiev */ 18296cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 18306cdadd4dSVladimir Kondratiev 18310436fd9aSVladimir Shulman /* performance monitoring */ 18320436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 183338d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 18340436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18357c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18360436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18370436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 18380436fd9aSVladimir Shulman } 18397c0acf86SVladimir Kondratiev 1840eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1841eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1842eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1843eb26cff1SMaya Erez * skb before it was completed. 1844eb26cff1SMaya Erez */ 1845eb26cff1SMaya Erez wmb(); 1846eb26cff1SMaya Erez 18472be7d22fSVladimir Kondratiev /* advance swhead */ 18482be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 18495b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 18505b29c573SVladimir Kondratiev vring->swhead); 185198658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 18523d4bde15SVladimir Kondratiev 18533d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18543d4bde15SVladimir Kondratiev * committing them to HW 18553d4bde15SVladimir Kondratiev */ 18563d4bde15SVladimir Kondratiev wmb(); 18573d4bde15SVladimir Kondratiev 1858b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 18592be7d22fSVladimir Kondratiev 18602be7d22fSVladimir Kondratiev return 0; 18612be7d22fSVladimir Kondratiev dma_error: 18622be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1863c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1864c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1865c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18667e594444SVladimir Kondratiev 18672be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1868c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 18698fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 187068ada71eSVladimir Kondratiev *d = *_d; 187168ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18722232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1873f88f113aSVladimir Kondratiev 1874f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18752be7d22fSVladimir Kondratiev } 18762be7d22fSVladimir Kondratiev 18772be7d22fSVladimir Kondratiev return -EINVAL; 18782be7d22fSVladimir Kondratiev } 18792be7d22fSVladimir Kondratiev 1880e00243faSLior David static int wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 1881e00243faSLior David struct vring *vring, struct sk_buff *skb) 18825933a06dSVladimir Kondratiev { 18835933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 18845933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 18855933a06dSVladimir Kondratiev int rc; 18865933a06dSVladimir Kondratiev 18875933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18883d4bde15SVladimir Kondratiev 1889fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1890fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1891fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1892fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1893fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1894fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1895fe9ee51eSMaya Erez return -EINVAL; 1896fe9ee51eSMaya Erez } 1897fe9ee51eSMaya Erez 18983d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 1899e00243faSLior David (wil, vif, vring, skb); 19003d4bde15SVladimir Kondratiev 19015933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 19023d4bde15SVladimir Kondratiev 19035933a06dSVladimir Kondratiev return rc; 19045933a06dSVladimir Kondratiev } 19055933a06dSVladimir Kondratiev 1906f9e3033fSDedy Lansky /** 1907f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 1908f9e3033fSDedy Lansky * 1909f9e3033fSDedy Lansky * This function does one of two checks: 1910f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1911f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1912f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1913f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1914f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1915f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1916f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1917f9e3033fSDedy Lansky * 1918f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1919f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1920f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1921f9e3033fSDedy Lansky */ 1922f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 1923f9e3033fSDedy Lansky struct vring *vring, 1924f9e3033fSDedy Lansky bool check_stop) 1925f9e3033fSDedy Lansky { 1926f9e3033fSDedy Lansky int i; 1927f9e3033fSDedy Lansky 1928f9e3033fSDedy Lansky if (vring) 1929f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d, check_stop=%d, stopped=%d", 1930f9e3033fSDedy Lansky (int)(vring - wil->vring_tx), check_stop, 1931f9e3033fSDedy Lansky wil->net_queue_stopped); 1932f9e3033fSDedy Lansky else 1933f9e3033fSDedy Lansky wil_dbg_txrx(wil, "check_stop=%d, stopped=%d", 1934f9e3033fSDedy Lansky check_stop, wil->net_queue_stopped); 1935f9e3033fSDedy Lansky 1936f9e3033fSDedy Lansky if (check_stop == wil->net_queue_stopped) 1937f9e3033fSDedy Lansky /* net queues already in desired state */ 1938f9e3033fSDedy Lansky return; 1939f9e3033fSDedy Lansky 1940f9e3033fSDedy Lansky if (check_stop) { 1941f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1942f9e3033fSDedy Lansky /* not enough room in the vring */ 1943e00243faSLior David netif_tx_stop_all_queues(wil->main_ndev); 1944f9e3033fSDedy Lansky wil->net_queue_stopped = true; 1945f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1946f9e3033fSDedy Lansky } 1947f9e3033fSDedy Lansky return; 1948f9e3033fSDedy Lansky } 1949f9e3033fSDedy Lansky 1950fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1951fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1952fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1953fe9ee51eSMaya Erez return; 1954fe9ee51eSMaya Erez 1955f9e3033fSDedy Lansky /* check wake */ 1956f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1957f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1958f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1959f9e3033fSDedy Lansky 1960f9e3033fSDedy Lansky if (!cur_vring->va || !txdata->enabled || cur_vring == vring) 1961f9e3033fSDedy Lansky continue; 1962f9e3033fSDedy Lansky 1963f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1964f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1965f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1966f9e3033fSDedy Lansky return; 1967f9e3033fSDedy Lansky } 1968f9e3033fSDedy Lansky } 1969f9e3033fSDedy Lansky 1970f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1971f9e3033fSDedy Lansky /* enough room in the vring */ 1972f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 1973e00243faSLior David netif_tx_wake_all_queues(wil->main_ndev); 1974f9e3033fSDedy Lansky wil->net_queue_stopped = false; 1975f9e3033fSDedy Lansky } 1976f9e3033fSDedy Lansky } 1977f9e3033fSDedy Lansky 1978f9e3033fSDedy Lansky void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring, 1979f9e3033fSDedy Lansky bool check_stop) 1980f9e3033fSDedy Lansky { 1981f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 1982f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1983f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1984f9e3033fSDedy Lansky } 1985f9e3033fSDedy Lansky 1986f9e3033fSDedy Lansky void wil_update_net_queues_bh(struct wil6210_priv *wil, struct vring *vring, 1987f9e3033fSDedy Lansky bool check_stop) 1988f9e3033fSDedy Lansky { 1989f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 1990f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1991f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1992f9e3033fSDedy Lansky } 1993f9e3033fSDedy Lansky 19942be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19952be7d22fSVladimir Kondratiev { 1996e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 1997e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 19983df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 199941d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 20002be7d22fSVladimir Kondratiev struct vring *vring; 2001aa27deaaSVladimir Kondratiev static bool pr_once_fw; 20022be7d22fSVladimir Kondratiev int rc; 20032be7d22fSVladimir Kondratiev 2004af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 200533c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2006aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20072be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2008aa27deaaSVladimir Kondratiev pr_once_fw = true; 2009aa27deaaSVladimir Kondratiev } 20102be7d22fSVladimir Kondratiev goto drop; 20112be7d22fSVladimir Kondratiev } 201233c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 2013d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 20142be7d22fSVladimir Kondratiev goto drop; 20152be7d22fSVladimir Kondratiev } 2016e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20172be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20182be7d22fSVladimir Kondratiev goto drop; 20192be7d22fSVladimir Kondratiev } 2020aa27deaaSVladimir Kondratiev pr_once_fw = false; 2021d58db4e4SVladimir Kondratiev 20222be7d22fSVladimir Kondratiev /* find vring */ 2023e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2024a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 2025e00243faSLior David vring = wil_find_tx_vring_sta(wil, vif, skb); 2026a895cb8bSLior David } else if (bcast) { 2027e00243faSLior David if (vif->pbss) 2028a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2029a895cb8bSLior David * all stations VRINGs 2030a895cb8bSLior David */ 2031e00243faSLior David vring = wil_find_tx_bcast_2(wil, vif, skb); 2032e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2033a895cb8bSLior David /* AP has a dedicated bcast VRING */ 2034e00243faSLior David vring = wil_find_tx_bcast_1(wil, vif, skb); 2035a895cb8bSLior David else 2036a895cb8bSLior David /* unexpected combination, fallback to duplicating 2037a895cb8bSLior David * the skb in all stations VRINGs 2038a895cb8bSLior David */ 2039e00243faSLior David vring = wil_find_tx_bcast_2(wil, vif, skb); 2040a895cb8bSLior David } else { 2041a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 2042e00243faSLior David vring = wil_find_tx_ucast(wil, vif, skb); 204354ed90a8SVladimir Kondratiev } 204433c477fdSVladimir Kondratiev if (unlikely(!vring)) { 20455aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 20462be7d22fSVladimir Kondratiev goto drop; 20472be7d22fSVladimir Kondratiev } 20482be7d22fSVladimir Kondratiev /* set up vring entry */ 2049e00243faSLior David rc = wil_tx_vring(wil, vif, vring, skb); 2050d58db4e4SVladimir Kondratiev 20512be7d22fSVladimir Kondratiev switch (rc) { 20522be7d22fSVladimir Kondratiev case 0: 2053f9e3033fSDedy Lansky /* shall we stop net queues? */ 2054f9e3033fSDedy Lansky wil_update_net_queues_bh(wil, vring, true); 2055795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20562be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20572be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20582be7d22fSVladimir Kondratiev case -ENOMEM: 20592be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20602be7d22fSVladimir Kondratiev default: 2061afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20622be7d22fSVladimir Kondratiev } 20632be7d22fSVladimir Kondratiev drop: 20642be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20652be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20662be7d22fSVladimir Kondratiev 20672be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20682be7d22fSVladimir Kondratiev } 20692be7d22fSVladimir Kondratiev 2070713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 2071713c8a29SVladimir Kondratiev { 2072713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 2073713c8a29SVladimir Kondratiev 2074713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 2075713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 2076713c8a29SVladimir Kondratiev } 2077713c8a29SVladimir Kondratiev 2078713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 2079713c8a29SVladimir Kondratiev { 2080713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 2081713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 2082713c8a29SVladimir Kondratiev else 2083713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 2084713c8a29SVladimir Kondratiev } 2085713c8a29SVladimir Kondratiev 20862be7d22fSVladimir Kondratiev /** 20872be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 20882be7d22fSVladimir Kondratiev * 2089e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2090e0287c4aSVladimir Kondratiev * 20912be7d22fSVladimir Kondratiev * Safe to call from IRQ 20922be7d22fSVladimir Kondratiev */ 2093e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 20942be7d22fSVladimir Kondratiev { 2095e00243faSLior David struct net_device *ndev = wil->main_ndev; 20962be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 20972be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 2098097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 2099e0287c4aSVladimir Kondratiev int done = 0; 2100c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 210141d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2102c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 21030436fd9aSVladimir Shulman int used_before_complete; 21040436fd9aSVladimir Shulman int used_new; 21052be7d22fSVladimir Kondratiev 210633c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21072be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2108e0287c4aSVladimir Kondratiev return 0; 21092be7d22fSVladimir Kondratiev } 21102be7d22fSVladimir Kondratiev 211133c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2112097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2113097638a0SVladimir Kondratiev return 0; 2114097638a0SVladimir Kondratiev } 2115097638a0SVladimir Kondratiev 2116af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21172be7d22fSVladimir Kondratiev 21180436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 21190436fd9aSVladimir Shulman 212041d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 212141d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 212241d6b093SVladimir Kondratiev 21232be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 2124c236658fSVladimir Kondratiev int new_swtail; 2125c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2126c236658fSVladimir Kondratiev /** 2127c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21283d4bde15SVladimir Kondratiev * last fragment. look for it. 21293d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2130c236658fSVladimir Kondratiev */ 2131c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2132c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2133c236658fSVladimir Kondratiev 2134c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 213533c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2136c236658fSVladimir Kondratiev break; 2137c236658fSVladimir Kondratiev 2138c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2139c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21404de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21417e594444SVladimir Kondratiev u16 dmalen; 214276dfa4b7SVladimir Kondratiev struct sk_buff *skb; 214376dfa4b7SVladimir Kondratiev 214476dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 214576dfa4b7SVladimir Kondratiev skb = ctx->skb; 2146c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 21474de41befSVladimir Kondratiev 214868ada71eSVladimir Kondratiev *d = *_d; 21494de41befSVladimir Kondratiev 21507e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 215198658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 215298658095SVladimir Kondratiev d->dma.error); 21537743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21545b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21555b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21565b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21575b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21582be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21592be7d22fSVladimir Kondratiev 21602232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2161f88f113aSVladimir Kondratiev 21622be7d22fSVladimir Kondratiev if (skb) { 216333c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2164795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2165795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 216641d6b093SVladimir Kondratiev if (stats) { 216741d6b093SVladimir Kondratiev stats->tx_packets++; 2168c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 216941d6b093SVladimir Kondratiev } 2170795ce734SVladimir Kondratiev } else { 2171795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 217241d6b093SVladimir Kondratiev if (stats) 2173c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2174795ce734SVladimir Kondratiev } 2175713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21762be7d22fSVladimir Kondratiev } 2177f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2178eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2179eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2180eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2181eb26cff1SMaya Erez * is completed. 2182eb26cff1SMaya Erez */ 2183eb26cff1SMaya Erez wmb(); 2184c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 218503269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 218603269c65SVladimir Kondratiev * so hardware will not try to process this desc., 218703269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 218803269c65SVladimir Kondratiev */ 21892be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2190e0287c4aSVladimir Kondratiev done++; 21912be7d22fSVladimir Kondratiev } 2192c236658fSVladimir Kondratiev } 219367c3e1b4SVladimir Kondratiev 21940436fd9aSVladimir Shulman /* performance monitoring */ 21950436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 219638d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 21970436fd9aSVladimir Shulman used_new, used_before_complete)) { 21980436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21990436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 22007c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 22017c0acf86SVladimir Kondratiev } 220267c3e1b4SVladimir Kondratiev 2203f9e3033fSDedy Lansky /* shall we wake net queues? */ 2204f9e3033fSDedy Lansky if (done) 2205f9e3033fSDedy Lansky wil_update_net_queues(wil, vring, false); 2206e0287c4aSVladimir Kondratiev 2207e0287c4aSVladimir Kondratiev return done; 22082be7d22fSVladimir Kondratiev } 2209