12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 32be7d22fSVladimir Kondratiev * 42be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 52be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 62be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 72be7d22fSVladimir Kondratiev * 82be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 92be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 102be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 112be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 122be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 132be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 142be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 152be7d22fSVladimir Kondratiev */ 162be7d22fSVladimir Kondratiev 172be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 182be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 192be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 202be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 21504937d4SKirshenbaum Erez #include <linux/ip.h> 22504937d4SKirshenbaum Erez #include <linux/ipv6.h> 23504937d4SKirshenbaum Erez #include <net/ipv6.h> 240786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 252be7d22fSVladimir Kondratiev 262be7d22fSVladimir Kondratiev #include "wil6210.h" 272be7d22fSVladimir Kondratiev #include "wmi.h" 282be7d22fSVladimir Kondratiev #include "txrx.h" 2998658095SVladimir Kondratiev #include "trace.h" 302be7d22fSVladimir Kondratiev 312be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3278484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 332be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 342be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 352be7d22fSVladimir Kondratiev 36c406ea7cSVladimir Kondratiev bool rx_align_2; 3778484c44SMaya Erez module_param(rx_align_2, bool, 0444); 38c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 39c406ea7cSVladimir Kondratiev 4052a45702SLior David bool rx_large_buf; 4152a45702SLior David module_param(rx_large_buf, bool, 0444); 4252a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4352a45702SLior David 44c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 45c406ea7cSVladimir Kondratiev { 46c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 47c406ea7cSVladimir Kondratiev } 48c406ea7cSVladimir Kondratiev 492be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 502be7d22fSVladimir Kondratiev { 512be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 522be7d22fSVladimir Kondratiev } 532be7d22fSVladimir Kondratiev 542be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 552be7d22fSVladimir Kondratiev { 562be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 572be7d22fSVladimir Kondratiev } 582be7d22fSVladimir Kondratiev 592be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 602be7d22fSVladimir Kondratiev { 612be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 622be7d22fSVladimir Kondratiev } 632be7d22fSVladimir Kondratiev 642be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 652be7d22fSVladimir Kondratiev { 662be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 672be7d22fSVladimir Kondratiev } 688fe59627SVladimir Kondratiev 690436fd9aSVladimir Shulman /* Used space in Tx Vring */ 700436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 712be7d22fSVladimir Kondratiev { 722be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 732be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 740436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 752be7d22fSVladimir Kondratiev } 762be7d22fSVladimir Kondratiev 770436fd9aSVladimir Shulman /* Available space in Tx Vring */ 780436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 790436fd9aSVladimir Shulman { 800436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 810436fd9aSVladimir Shulman } 820436fd9aSVladimir Shulman 830436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 845bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 855bb6423eSVladimir Kondratiev { 865bb6423eSVladimir Kondratiev return vring->size/8; 875bb6423eSVladimir Kondratiev } 885bb6423eSVladimir Kondratiev 890436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 905bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 915bb6423eSVladimir Kondratiev { 925bb6423eSVladimir Kondratiev return vring->size/4; 935bb6423eSVladimir Kondratiev } 945bb6423eSVladimir Kondratiev 95f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 96f9e3033fSDedy Lansky static inline int wil_vring_avail_low(struct vring *vring) 97f9e3033fSDedy Lansky { 98f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring); 99f9e3033fSDedy Lansky } 100f9e3033fSDedy Lansky 101f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 102f9e3033fSDedy Lansky static inline int wil_vring_avail_high(struct vring *vring) 103f9e3033fSDedy Lansky { 104f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring); 105f9e3033fSDedy Lansky } 106f9e3033fSDedy Lansky 107fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 108fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 109fe9ee51eSMaya Erez { 110fe9ee51eSMaya Erez int i; 111fe9ee51eSMaya Erez unsigned long data_comp_to; 112fe9ee51eSMaya Erez 113fe9ee51eSMaya Erez for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 114fe9ee51eSMaya Erez struct vring *vring = &wil->vring_tx[i]; 115fe9ee51eSMaya Erez int vring_index = vring - wil->vring_tx; 116fe9ee51eSMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 117fe9ee51eSMaya Erez 118fe9ee51eSMaya Erez spin_lock(&txdata->lock); 119fe9ee51eSMaya Erez 120fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 121fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 122fe9ee51eSMaya Erez continue; 123fe9ee51eSMaya Erez } 124fe9ee51eSMaya Erez 125fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 126fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 127fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 128fe9ee51eSMaya Erez while (!wil_vring_is_empty(vring)) { 129fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 130fe9ee51eSMaya Erez wil_dbg_pm(wil, 131fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 132fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 133fe9ee51eSMaya Erez return false; 134fe9ee51eSMaya Erez } 135fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 136fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 137fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 138fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 139fe9ee51eSMaya Erez msleep(20); 140fe9ee51eSMaya Erez spin_lock(&txdata->lock); 141fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 142fe9ee51eSMaya Erez break; 143fe9ee51eSMaya Erez } 144fe9ee51eSMaya Erez } 145fe9ee51eSMaya Erez 146fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 147fe9ee51eSMaya Erez } 148fe9ee51eSMaya Erez 149fe9ee51eSMaya Erez return true; 150fe9ee51eSMaya Erez } 151fe9ee51eSMaya Erez 1520436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 1530436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 1540436fd9aSVladimir Shulman { 1550436fd9aSVladimir Shulman return val >= min && val < max; 1560436fd9aSVladimir Shulman } 1570436fd9aSVladimir Shulman 1582be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 1592be7d22fSVladimir Kondratiev { 1602be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1612be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1622be7d22fSVladimir Kondratiev uint i; 1632be7d22fSVladimir Kondratiev 164af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1659cf10d62SVladimir Kondratiev 1662be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1672be7d22fSVladimir Kondratiev 1682be7d22fSVladimir Kondratiev vring->swhead = 0; 1692be7d22fSVladimir Kondratiev vring->swtail = 0; 170f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1712be7d22fSVladimir Kondratiev if (!vring->ctx) { 1722be7d22fSVladimir Kondratiev vring->va = NULL; 1732be7d22fSVladimir Kondratiev return -ENOMEM; 1742be7d22fSVladimir Kondratiev } 175f2de576dSHamad Kadmany 1760436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 177f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 178f2de576dSHamad Kadmany * 179f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 180f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1813dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1823dc2c13bSLazar Alexei * allocation before allocating vring memory. 183f2de576dSHamad Kadmany * 184f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 185f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 186f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1872be7d22fSVladimir Kondratiev */ 1883dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 189f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 190f2de576dSHamad Kadmany 1912be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1922be7d22fSVladimir Kondratiev if (!vring->va) { 1932be7d22fSVladimir Kondratiev kfree(vring->ctx); 1942be7d22fSVladimir Kondratiev vring->ctx = NULL; 1952be7d22fSVladimir Kondratiev return -ENOMEM; 1962be7d22fSVladimir Kondratiev } 197f2de576dSHamad Kadmany 1983dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1993dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 2003dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 201f2de576dSHamad Kadmany 2022be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 2032be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 2042be7d22fSVladimir Kondratiev * we can use any 2052be7d22fSVladimir Kondratiev */ 2062be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 2078fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 2088fe59627SVladimir Kondratiev 20968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 2102be7d22fSVladimir Kondratiev } 2112be7d22fSVladimir Kondratiev 21239c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 21339c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 2142be7d22fSVladimir Kondratiev 2152be7d22fSVladimir Kondratiev return 0; 2162be7d22fSVladimir Kondratiev } 2172be7d22fSVladimir Kondratiev 2182232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 2192232abd5SVladimir Kondratiev struct wil_ctx *ctx) 2202232abd5SVladimir Kondratiev { 2212232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 2222232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 2238fe59627SVladimir Kondratiev 2242232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 2252232abd5SVladimir Kondratiev case wil_mapped_as_single: 2262232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 2272232abd5SVladimir Kondratiev break; 2282232abd5SVladimir Kondratiev case wil_mapped_as_page: 2292232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 2302232abd5SVladimir Kondratiev break; 2312232abd5SVladimir Kondratiev default: 2322232abd5SVladimir Kondratiev break; 2332232abd5SVladimir Kondratiev } 2342232abd5SVladimir Kondratiev } 2352232abd5SVladimir Kondratiev 2362be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 2372be7d22fSVladimir Kondratiev int tx) 2382be7d22fSVladimir Kondratiev { 2392be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2402be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2412be7d22fSVladimir Kondratiev 2429b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 243ef77285fSVladimir Kondratiev if (tx) { 244ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 245ef77285fSVladimir Kondratiev 246ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 247ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 248ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 249ef77285fSVladimir Kondratiev } else { 250ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 251ef77285fSVladimir Kondratiev vring->size, vring->va, 252ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 253ef77285fSVladimir Kondratiev } 254ef77285fSVladimir Kondratiev 2552be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 25668ada71eSVladimir Kondratiev dma_addr_t pa; 2577e594444SVladimir Kondratiev u16 dmalen; 258f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 25968ada71eSVladimir Kondratiev 2602be7d22fSVladimir Kondratiev if (tx) { 26168ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 26268ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 2632be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 26468ada71eSVladimir Kondratiev 265f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 26634b8886eSMaya Erez if (!ctx) { 26734b8886eSMaya Erez wil_dbg_txrx(wil, 26834b8886eSMaya Erez "ctx(%d) was already completed\n", 26934b8886eSMaya Erez vring->swtail); 27034b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 27134b8886eSMaya Erez continue; 27234b8886eSMaya Erez } 27368ada71eSVladimir Kondratiev *d = *_d; 2742232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 275f88f113aSVladimir Kondratiev if (ctx->skb) 276f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 2772be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2782be7d22fSVladimir Kondratiev } else { /* rx */ 27968ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 28068ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2814d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 28268ada71eSVladimir Kondratiev 283f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 28468ada71eSVladimir Kondratiev *d = *_d; 28568ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2867e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2877e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 288f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2892be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2902be7d22fSVladimir Kondratiev } 2912be7d22fSVladimir Kondratiev } 2922be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2932be7d22fSVladimir Kondratiev kfree(vring->ctx); 2942be7d22fSVladimir Kondratiev vring->pa = 0; 2952be7d22fSVladimir Kondratiev vring->va = NULL; 2962be7d22fSVladimir Kondratiev vring->ctx = NULL; 2972be7d22fSVladimir Kondratiev } 2982be7d22fSVladimir Kondratiev 2992be7d22fSVladimir Kondratiev /** 3002be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 3012be7d22fSVladimir Kondratiev * 3022be7d22fSVladimir Kondratiev * Safe to call from IRQ 3032be7d22fSVladimir Kondratiev */ 3042be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 3052be7d22fSVladimir Kondratiev u32 i, int headroom) 3062be7d22fSVladimir Kondratiev { 3072be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 30852a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 30968ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 3108fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 3112be7d22fSVladimir Kondratiev dma_addr_t pa; 3122be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 3138fe59627SVladimir Kondratiev 3142be7d22fSVladimir Kondratiev if (unlikely(!skb)) 3152be7d22fSVladimir Kondratiev return -ENOMEM; 3162be7d22fSVladimir Kondratiev 3172be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 3182be7d22fSVladimir Kondratiev skb_put(skb, sz); 3192be7d22fSVladimir Kondratiev 3202be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 3212be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 3222be7d22fSVladimir Kondratiev kfree_skb(skb); 3232be7d22fSVladimir Kondratiev return -ENOMEM; 3242be7d22fSVladimir Kondratiev } 3252be7d22fSVladimir Kondratiev 32648c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 32768ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 3282be7d22fSVladimir Kondratiev /* ip_length don't care */ 3292be7d22fSVladimir Kondratiev /* b11 don't care */ 3302be7d22fSVladimir Kondratiev /* error don't care */ 3312be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3327e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 33368ada71eSVladimir Kondratiev *_d = *d; 334f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3352be7d22fSVladimir Kondratiev 3362be7d22fSVladimir Kondratiev return 0; 3372be7d22fSVladimir Kondratiev } 3382be7d22fSVladimir Kondratiev 3392be7d22fSVladimir Kondratiev /** 3402be7d22fSVladimir Kondratiev * Adds radiotap header 3412be7d22fSVladimir Kondratiev * 3422be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3432be7d22fSVladimir Kondratiev * 3442be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3452be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3462be7d22fSVladimir Kondratiev * - Phy info 3472be7d22fSVladimir Kondratiev */ 3482be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 34933e61169SVladimir Kondratiev struct sk_buff *skb) 3502be7d22fSVladimir Kondratiev { 3512be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 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]; 3782be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_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); 4782be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 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 { 6282be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 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; 717c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 718c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 7192be7d22fSVladimir Kondratiev unsigned int len = skb->len; 720c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 72141d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 72258527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 723c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 724c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 725c42da999SVladimir Kondratiev * is not suitable, need to look at data 726c42da999SVladimir Kondratiev */ 727c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 728c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 729c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 730c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 731c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 732c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 733c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 734c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 735c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 736c42da999SVladimir Kondratiev }; 7372be7d22fSVladimir Kondratiev 7380553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7390553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7400553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7410553640dSVladimir Shulman * mechanism, core will be chosen according 7420553640dSVladimir Shulman * to user-level rps configuration. 7430553640dSVladimir Shulman */ 7440553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7450553640dSVladimir Shulman 746241804cbSVladimir Kondratiev skb_orphan(skb); 747241804cbSVladimir Kondratiev 74858527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 74958527421SVladimir Kondratiev rc = GRO_DROP; 75058527421SVladimir Kondratiev dev_kfree_skb(skb); 75158527421SVladimir Kondratiev stats->rx_replay++; 75258527421SVladimir Kondratiev goto stats; 75358527421SVladimir Kondratiev } 75458527421SVladimir Kondratiev 75502beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 756c42da999SVladimir Kondratiev if (mcast) { 757c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 758c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 759c42da999SVladimir Kondratiev */ 760c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 761c42da999SVladimir Kondratiev } else { 762c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 7632be7d22fSVladimir Kondratiev 764c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 765c42da999SVladimir Kondratiev /* The destination station is associated to 766c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 767c42da999SVladimir Kondratiev * directly to it and do not pass it to local 768c42da999SVladimir Kondratiev * net stack. 769c42da999SVladimir Kondratiev */ 770c42da999SVladimir Kondratiev xmit_skb = skb; 771c42da999SVladimir Kondratiev skb = NULL; 772c42da999SVladimir Kondratiev } 773c42da999SVladimir Kondratiev } 774c42da999SVladimir Kondratiev } 775c42da999SVladimir Kondratiev if (xmit_skb) { 776c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 777c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 778c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 779c42da999SVladimir Kondratiev */ 780c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 781c42da999SVladimir Kondratiev xmit_skb->priority += 256; 782c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 783c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 784c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 785c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 786c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 787c42da999SVladimir Kondratiev } 788c42da999SVladimir Kondratiev 789c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 790c42da999SVladimir Kondratiev 791c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 792c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 793c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 794c42da999SVladimir Kondratiev len, gro_res_str[rc]); 795c42da999SVladimir Kondratiev } 79658527421SVladimir Kondratiev stats: 797c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 798b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 799b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 800b5998e6aSVladimir Kondratiev stats->rx_dropped++; 801b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 802b5998e6aSVladimir Kondratiev } else { 8032be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 804c8b78b5fSVladimir Kondratiev stats->rx_packets++; 8052be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 806c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 807c42da999SVladimir Kondratiev if (mcast) 808c42da999SVladimir Kondratiev ndev->stats.multicast++; 809194b482bSVladimir Kondratiev } 8102be7d22fSVladimir Kondratiev } 8112be7d22fSVladimir Kondratiev 8122be7d22fSVladimir Kondratiev /** 8132be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 8142be7d22fSVladimir Kondratiev * 815e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8162be7d22fSVladimir Kondratiev */ 817e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8182be7d22fSVladimir Kondratiev { 8192be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 8202be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 8212be7d22fSVladimir Kondratiev struct sk_buff *skb; 8222be7d22fSVladimir Kondratiev 82333c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8242be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8252be7d22fSVladimir Kondratiev return; 8262be7d22fSVladimir Kondratiev } 827af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 828e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 829e0287c4aSVladimir Kondratiev (*quota)--; 8302be7d22fSVladimir Kondratiev 8312be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 8322be7d22fSVladimir Kondratiev skb->dev = ndev; 8332be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8342be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8352be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8362be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 837b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8382be7d22fSVladimir Kondratiev } else { 839b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8402be7d22fSVladimir Kondratiev } 8412be7d22fSVladimir Kondratiev } 8422be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8432be7d22fSVladimir Kondratiev } 8442be7d22fSVladimir Kondratiev 84552a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 84652a45702SLior David { 84752a45702SLior David wil->rx_buf_len = rx_large_buf ? 84852a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 84952a45702SLior David if (mtu_max > wil->rx_buf_len) { 85052a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 85152a45702SLior David * backward compatibility (mtu_max parameter was also used 85252a45702SLior David * to support receiving large packets) 85352a45702SLior David */ 85452a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 85552a45702SLior David wil->rx_buf_len = mtu_max; 85652a45702SLior David } 85752a45702SLior David } 85852a45702SLior David 859d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 8602be7d22fSVladimir Kondratiev { 8612be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8622be7d22fSVladimir Kondratiev int rc; 8632be7d22fSVladimir Kondratiev 864af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8659cf10d62SVladimir Kondratiev 8668bf6adb9SVladimir Kondratiev if (vring->va) { 8678bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8688bf6adb9SVladimir Kondratiev return -EINVAL; 8698bf6adb9SVladimir Kondratiev } 8708bf6adb9SVladimir Kondratiev 87152a45702SLior David wil_rx_buf_len_init(wil); 87252a45702SLior David 873d3762b40SVladimir Kondratiev vring->size = size; 8742be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8752be7d22fSVladimir Kondratiev if (rc) 8762be7d22fSVladimir Kondratiev return rc; 8772be7d22fSVladimir Kondratiev 87847e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8792be7d22fSVladimir Kondratiev if (rc) 8802be7d22fSVladimir Kondratiev goto err_free; 8812be7d22fSVladimir Kondratiev 8822be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8832be7d22fSVladimir Kondratiev if (rc) 8842be7d22fSVladimir Kondratiev goto err_free; 8852be7d22fSVladimir Kondratiev 8862be7d22fSVladimir Kondratiev return 0; 8872be7d22fSVladimir Kondratiev err_free: 8882be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8892be7d22fSVladimir Kondratiev 8902be7d22fSVladimir Kondratiev return rc; 8912be7d22fSVladimir Kondratiev } 8922be7d22fSVladimir Kondratiev 8932be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 8942be7d22fSVladimir Kondratiev { 8952be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8962be7d22fSVladimir Kondratiev 897af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8989cf10d62SVladimir Kondratiev 8992acb4220SVladimir Kondratiev if (vring->va) 9002be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 9012be7d22fSVladimir Kondratiev } 9022be7d22fSVladimir Kondratiev 903875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 904875e9439SMaya Erez { 905875e9439SMaya Erez spin_lock_bh(&txdata->lock); 906875e9439SMaya Erez txdata->dot1x_open = 0; 907875e9439SMaya Erez txdata->enabled = 0; 908875e9439SMaya Erez txdata->idle = 0; 909875e9439SMaya Erez txdata->last_idle = 0; 910875e9439SMaya Erez txdata->begin = 0; 911875e9439SMaya Erez txdata->agg_wsize = 0; 912875e9439SMaya Erez txdata->agg_timeout = 0; 913875e9439SMaya Erez txdata->agg_amsdu = 0; 914875e9439SMaya Erez txdata->addba_in_progress = false; 915875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 916875e9439SMaya Erez } 917875e9439SMaya Erez 9182be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 9192be7d22fSVladimir Kondratiev int cid, int tid) 9202be7d22fSVladimir Kondratiev { 9212be7d22fSVladimir Kondratiev int rc; 9222be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9232be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9242be7d22fSVladimir Kondratiev .vring_cfg = { 9252be7d22fSVladimir Kondratiev .tx_sw_ring = { 9269a06bec9SVladimir Kondratiev .max_mpdu_size = 927c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 928b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9292be7d22fSVladimir Kondratiev }, 9302be7d22fSVladimir Kondratiev .ringid = id, 931a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9322be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9332be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9342be7d22fSVladimir Kondratiev .to_resolution = 0, 9353277213fSVladimir Kondratiev .agg_max_wsize = 0, 9362be7d22fSVladimir Kondratiev .schd_params = { 9372be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9382be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9392be7d22fSVladimir Kondratiev }, 9402be7d22fSVladimir Kondratiev }, 9412be7d22fSVladimir Kondratiev }; 9422be7d22fSVladimir Kondratiev struct { 943b874ddecSLior David struct wmi_cmd_hdr wmi; 9442be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 9452be7d22fSVladimir Kondratiev } __packed reply; 9462be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 947097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9482be7d22fSVladimir Kondratiev 949af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 950e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9519b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9529cf10d62SVladimir Kondratiev 9532be7d22fSVladimir Kondratiev if (vring->va) { 9542be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9552be7d22fSVladimir Kondratiev rc = -EINVAL; 9562be7d22fSVladimir Kondratiev goto out; 9572be7d22fSVladimir Kondratiev } 9582be7d22fSVladimir Kondratiev 959875e9439SMaya Erez wil_tx_data_init(txdata); 9602be7d22fSVladimir Kondratiev vring->size = size; 9612be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9622be7d22fSVladimir Kondratiev if (rc) 9632be7d22fSVladimir Kondratiev goto out; 9642be7d22fSVladimir Kondratiev 96593ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 96693ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 96793ae6d49SVladimir Kondratiev 9682be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9692be7d22fSVladimir Kondratiev 970230d8442SVladimir Kondratiev if (!wil->privacy) 971230d8442SVladimir Kondratiev txdata->dot1x_open = true; 9722be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 9732be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9742be7d22fSVladimir Kondratiev if (rc) 9752be7d22fSVladimir Kondratiev goto out_free; 9762be7d22fSVladimir Kondratiev 977b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9782be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9792be7d22fSVladimir Kondratiev reply.cmd.status); 980c331997bSVladimir Kondratiev rc = -EINVAL; 9812be7d22fSVladimir Kondratiev goto out_free; 9822be7d22fSVladimir Kondratiev } 9832be7d22fSVladimir Kondratiev 984dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 985dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 986097638a0SVladimir Kondratiev txdata->enabled = 1; 987dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 988dc90506fSMaya Erez 989230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9903a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 991097638a0SVladimir Kondratiev 9922be7d22fSVladimir Kondratiev return 0; 9932be7d22fSVladimir Kondratiev out_free: 994875e9439SMaya Erez spin_lock_bh(&txdata->lock); 995230d8442SVladimir Kondratiev txdata->dot1x_open = false; 996230d8442SVladimir Kondratiev txdata->enabled = 0; 997875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 9982be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9990916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 10000916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 10010916d9f2SMaya Erez 10022be7d22fSVladimir Kondratiev out: 10032be7d22fSVladimir Kondratiev 10042be7d22fSVladimir Kondratiev return rc; 10052be7d22fSVladimir Kondratiev } 10062be7d22fSVladimir Kondratiev 100741d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 100841d6b093SVladimir Kondratiev { 100941d6b093SVladimir Kondratiev int rc; 101041d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 101141d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 101241d6b093SVladimir Kondratiev .vring_cfg = { 101341d6b093SVladimir Kondratiev .tx_sw_ring = { 101441d6b093SVladimir Kondratiev .max_mpdu_size = 101541d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 101641d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 101741d6b093SVladimir Kondratiev }, 101841d6b093SVladimir Kondratiev .ringid = id, 101941d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 102041d6b093SVladimir Kondratiev }, 102141d6b093SVladimir Kondratiev }; 102241d6b093SVladimir Kondratiev struct { 1023b874ddecSLior David struct wmi_cmd_hdr wmi; 102441d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 102541d6b093SVladimir Kondratiev } __packed reply; 102641d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 102741d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 102841d6b093SVladimir Kondratiev 1029af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 103041d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10319b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 103241d6b093SVladimir Kondratiev 103341d6b093SVladimir Kondratiev if (vring->va) { 103441d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 103541d6b093SVladimir Kondratiev rc = -EINVAL; 103641d6b093SVladimir Kondratiev goto out; 103741d6b093SVladimir Kondratiev } 103841d6b093SVladimir Kondratiev 1039875e9439SMaya Erez wil_tx_data_init(txdata); 104041d6b093SVladimir Kondratiev vring->size = size; 104141d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 104241d6b093SVladimir Kondratiev if (rc) 104341d6b093SVladimir Kondratiev goto out; 104441d6b093SVladimir Kondratiev 104541d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 104641d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 104741d6b093SVladimir Kondratiev 104841d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 104941d6b093SVladimir Kondratiev 1050230d8442SVladimir Kondratiev if (!wil->privacy) 1051230d8442SVladimir Kondratiev txdata->dot1x_open = true; 105241d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 105341d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 105441d6b093SVladimir Kondratiev if (rc) 105541d6b093SVladimir Kondratiev goto out_free; 105641d6b093SVladimir Kondratiev 105741d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 105841d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 105941d6b093SVladimir Kondratiev reply.cmd.status); 106041d6b093SVladimir Kondratiev rc = -EINVAL; 106141d6b093SVladimir Kondratiev goto out_free; 106241d6b093SVladimir Kondratiev } 106341d6b093SVladimir Kondratiev 1064dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1065dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 106641d6b093SVladimir Kondratiev txdata->enabled = 1; 1067dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 106841d6b093SVladimir Kondratiev 106941d6b093SVladimir Kondratiev return 0; 107041d6b093SVladimir Kondratiev out_free: 1071875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1072230d8442SVladimir Kondratiev txdata->enabled = 0; 1073230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1074875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 107541d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 107641d6b093SVladimir Kondratiev out: 107741d6b093SVladimir Kondratiev 107841d6b093SVladimir Kondratiev return rc; 107941d6b093SVladimir Kondratiev } 108041d6b093SVladimir Kondratiev 10812be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 10822be7d22fSVladimir Kondratiev { 10832be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 10843a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 10852be7d22fSVladimir Kondratiev 10869b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1087097638a0SVladimir Kondratiev 10882be7d22fSVladimir Kondratiev if (!vring->va) 10892be7d22fSVladimir Kondratiev return; 10902be7d22fSVladimir Kondratiev 1091af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 10929cf10d62SVladimir Kondratiev 10935933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1094230d8442SVladimir Kondratiev txdata->dot1x_open = false; 10955933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 10965933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 109734b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 109834b8886eSMaya Erez * not prevent the next NAPI run. 109934b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 110034b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 110134b8886eSMaya Erez * handle this vring 110234b8886eSMaya Erez */ 110334b8886eSMaya Erez wmb(); 1104097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 11059419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1106097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1107097638a0SVladimir Kondratiev 11082be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 11092be7d22fSVladimir Kondratiev } 11102be7d22fSVladimir Kondratiev 111141d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 11122be7d22fSVladimir Kondratiev struct sk_buff *skb) 11132be7d22fSVladimir Kondratiev { 11143df2cd36SVladimir Kondratiev int i; 11153df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 11163df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 11172be7d22fSVladimir Kondratiev 11183df2cd36SVladimir Kondratiev if (cid < 0) 11193df2cd36SVladimir Kondratiev return NULL; 11203df2cd36SVladimir Kondratiev 11213df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 11223df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1123230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1124230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1125230d8442SVladimir Kondratiev continue; 11263df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 11273df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1128b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 11298fe59627SVladimir Kondratiev 1130af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1131af3db60aSLazar Alexei eth->h_dest, i); 1132b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11332be7d22fSVladimir Kondratiev return v; 11343df2cd36SVladimir Kondratiev } else { 1135af3db60aSLazar Alexei wil_dbg_txrx(wil, 1136af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1137af3db60aSLazar Alexei i); 11383df2cd36SVladimir Kondratiev return NULL; 11393df2cd36SVladimir Kondratiev } 11403df2cd36SVladimir Kondratiev } 11413df2cd36SVladimir Kondratiev } 11422be7d22fSVladimir Kondratiev 11432be7d22fSVladimir Kondratiev return NULL; 11442be7d22fSVladimir Kondratiev } 11452be7d22fSVladimir Kondratiev 1146fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1147fb3cac57SVladimir Kondratiev struct sk_buff *skb); 114854ed90a8SVladimir Kondratiev 114954ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 115054ed90a8SVladimir Kondratiev struct sk_buff *skb) 115154ed90a8SVladimir Kondratiev { 115254ed90a8SVladimir Kondratiev struct vring *v; 115354ed90a8SVladimir Kondratiev int i; 115454ed90a8SVladimir Kondratiev u8 cid; 1155b729aaf0SMaya Erez struct vring_tx_data *txdata; 115654ed90a8SVladimir Kondratiev 115754ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 115854ed90a8SVladimir Kondratiev * for the AP we connected to. 1159230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 116054ed90a8SVladimir Kondratiev */ 116154ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 116254ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1163b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1164b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 116554ed90a8SVladimir Kondratiev continue; 116654ed90a8SVladimir Kondratiev 116754ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 116841d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116941d6b093SVladimir Kondratiev continue; 117041d6b093SVladimir Kondratiev 1171230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 117254ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1173230d8442SVladimir Kondratiev continue; 117454ed90a8SVladimir Kondratiev 117554ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 117654ed90a8SVladimir Kondratiev 117754ed90a8SVladimir Kondratiev return v; 117854ed90a8SVladimir Kondratiev } 117954ed90a8SVladimir Kondratiev 118054ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 118154ed90a8SVladimir Kondratiev 118254ed90a8SVladimir Kondratiev return NULL; 118354ed90a8SVladimir Kondratiev } 118454ed90a8SVladimir Kondratiev 118570812421SVladimir Kondratiev /* Use one of 2 strategies: 118670812421SVladimir Kondratiev * 118770812421SVladimir Kondratiev * 1. New (real broadcast): 118870812421SVladimir Kondratiev * use dedicated broadcast vring 118970812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 119070812421SVladimir Kondratiev * Find 1-st vring and return it; 119170812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 119270812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 119370812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 119470812421SVladimir Kondratiev * - for PBSS 119570812421SVladimir Kondratiev */ 119670812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1197fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1198fb3cac57SVladimir Kondratiev { 119941d6b093SVladimir Kondratiev struct vring *v; 1200b729aaf0SMaya Erez struct vring_tx_data *txdata; 120141d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1202fb3cac57SVladimir Kondratiev 120341d6b093SVladimir Kondratiev if (i < 0) 120441d6b093SVladimir Kondratiev return NULL; 1205fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1206b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1207b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1208fb3cac57SVladimir Kondratiev return NULL; 1209230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1210230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1211230d8442SVladimir Kondratiev return NULL; 1212fb3cac57SVladimir Kondratiev 1213fb3cac57SVladimir Kondratiev return v; 1214fb3cac57SVladimir Kondratiev } 1215fb3cac57SVladimir Kondratiev 121670812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 121770812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 121870812421SVladimir Kondratiev { 121970812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 122070812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 122170812421SVladimir Kondratiev 122270812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 122370812421SVladimir Kondratiev } 122470812421SVladimir Kondratiev 122570812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 122670812421SVladimir Kondratiev struct sk_buff *skb) 122770812421SVladimir Kondratiev { 122870812421SVladimir Kondratiev struct vring *v, *v2; 122970812421SVladimir Kondratiev struct sk_buff *skb2; 123070812421SVladimir Kondratiev int i; 123170812421SVladimir Kondratiev u8 cid; 123270812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 123370812421SVladimir Kondratiev char *src = eth->h_source; 1234b729aaf0SMaya Erez struct vring_tx_data *txdata; 123570812421SVladimir Kondratiev 123670812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 123770812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 123870812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1239b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1240b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 124170812421SVladimir Kondratiev continue; 124270812421SVladimir Kondratiev 124370812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 124470812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 124570812421SVladimir Kondratiev continue; 1246230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1247230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 124870812421SVladimir Kondratiev continue; 124970812421SVladimir Kondratiev 125070812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 125170812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 125270812421SVladimir Kondratiev continue; 125370812421SVladimir Kondratiev 125470812421SVladimir Kondratiev goto found; 125570812421SVladimir Kondratiev } 125670812421SVladimir Kondratiev 125770812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 125870812421SVladimir Kondratiev 125970812421SVladimir Kondratiev return NULL; 126070812421SVladimir Kondratiev 126170812421SVladimir Kondratiev found: 126270812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 126370812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 126470812421SVladimir Kondratiev 126570812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 126670812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 126770812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 126870812421SVladimir Kondratiev if (!v2->va) 126970812421SVladimir Kondratiev continue; 127070812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 127170812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 127270812421SVladimir Kondratiev continue; 1273230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1274230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 127570812421SVladimir Kondratiev continue; 127670812421SVladimir Kondratiev 127770812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 127870812421SVladimir Kondratiev continue; 127970812421SVladimir Kondratiev 128070812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 128170812421SVladimir Kondratiev if (skb2) { 128270812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 128370812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 128470812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 128570812421SVladimir Kondratiev } else { 128670812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 128770812421SVladimir Kondratiev } 128870812421SVladimir Kondratiev } 128970812421SVladimir Kondratiev 129070812421SVladimir Kondratiev return v; 129170812421SVladimir Kondratiev } 129270812421SVladimir Kondratiev 129399b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 129499b55bd2SKirshenbaum Erez int vring_index) 12952be7d22fSVladimir Kondratiev { 129668ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 12972be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 12982be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 12992be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 13002be7d22fSVladimir Kondratiev d->dma.error = 0; 13012be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 13027e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 130399b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 13042be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 13052be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 13062be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 13072be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 13082be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 13092be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 13102be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 13112be7d22fSVladimir Kondratiev 13122be7d22fSVladimir Kondratiev return 0; 13132be7d22fSVladimir Kondratiev } 13142be7d22fSVladimir Kondratiev 1315c236658fSVladimir Kondratiev static inline 1316c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1317c236658fSVladimir Kondratiev { 13183d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1319c236658fSVladimir Kondratiev } 1320c236658fSVladimir Kondratiev 13213d4bde15SVladimir Kondratiev /** 13223d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13233d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13243d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13253d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13263d4bde15SVladimir Kondratiev */ 13273d4bde15SVladimir Kondratiev 13283d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13293d4bde15SVladimir Kondratiev struct sk_buff *skb, 13303d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13313d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1332504937d4SKirshenbaum Erez { 13333d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13343d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13353d4bde15SVladimir Kondratiev 13363d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13373d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13383d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13393d4bde15SVladimir Kondratiev 13403d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13413d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13423d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13433d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13443d4bde15SVladimir Kondratiev 13453d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13463d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13473d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13483d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13493d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13503d4bde15SVladimir Kondratiev } 13513d4bde15SVladimir Kondratiev 13523d4bde15SVladimir Kondratiev /** 13533d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13543d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13553d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13563d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13573d4bde15SVladimir Kondratiev * 13583d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13593d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13603d4bde15SVladimir Kondratiev */ 13613d4bde15SVladimir Kondratiev 13623d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13633d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1364504937d4SKirshenbaum Erez int protocol; 1365504937d4SKirshenbaum Erez 1366504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1367504937d4SKirshenbaum Erez return 0; 1368504937d4SKirshenbaum Erez 1369df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1370df2d08eeSVladimir Kondratiev 1371504937d4SKirshenbaum Erez switch (skb->protocol) { 1372504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1373504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1374df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1375504937d4SKirshenbaum Erez break; 1376504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1377504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1378504937d4SKirshenbaum Erez break; 1379504937d4SKirshenbaum Erez default: 1380504937d4SKirshenbaum Erez return -EINVAL; 1381504937d4SKirshenbaum Erez } 1382504937d4SKirshenbaum Erez 1383504937d4SKirshenbaum Erez switch (protocol) { 1384504937d4SKirshenbaum Erez case IPPROTO_TCP: 1385504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1386504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1387504937d4SKirshenbaum Erez d->dma.d0 |= 1388504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1389504937d4SKirshenbaum Erez break; 1390504937d4SKirshenbaum Erez case IPPROTO_UDP: 1391504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1392504937d4SKirshenbaum Erez d->dma.d0 |= 1393504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1394504937d4SKirshenbaum Erez break; 1395504937d4SKirshenbaum Erez default: 1396504937d4SKirshenbaum Erez return -EINVAL; 1397504937d4SKirshenbaum Erez } 1398504937d4SKirshenbaum Erez 1399504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1400504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1401504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1402504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1403504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1404504937d4SKirshenbaum Erez 1405504937d4SKirshenbaum Erez return 0; 1406504937d4SKirshenbaum Erez } 1407504937d4SKirshenbaum Erez 14083d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14093d4bde15SVladimir Kondratiev { 14103d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14113d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14123d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14133d4bde15SVladimir Kondratiev } 14143d4bde15SVladimir Kondratiev 14153d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14163d4bde15SVladimir Kondratiev { 14173d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14183d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14193d4bde15SVladimir Kondratiev } 14203d4bde15SVladimir Kondratiev 14213d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 14223d4bde15SVladimir Kondratiev struct sk_buff *skb) 14233d4bde15SVladimir Kondratiev { 14243d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14253d4bde15SVladimir Kondratiev 14263d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14273d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14283d4bde15SVladimir Kondratiev *_first_desc = NULL; 14293d4bde15SVladimir Kondratiev 14303d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14313d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14323d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14333d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14343d4bde15SVladimir Kondratiev 14353d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14363d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14373d4bde15SVladimir Kondratiev 14383d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14393d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14403d4bde15SVladimir Kondratiev 14413d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 14423d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 14433d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14443d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14453d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14463d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 14473d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 14483d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 14493d4bde15SVladimir Kondratiev uint i = swhead; 14503d4bde15SVladimir Kondratiev dma_addr_t pa; 14513d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14523d4bde15SVladimir Kondratiev int rem_data = mss; 14533d4bde15SVladimir Kondratiev int lenmss; 14543d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14553d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14563d4bde15SVladimir Kondratiev bool is_ipv4; 14573d4bde15SVladimir Kondratiev int tcp_hdr_len; 14583d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14593d4bde15SVladimir Kondratiev int gso_type; 1460e3d2ed94SHamad Kadmany int rc = -EINVAL; 14613d4bde15SVladimir Kondratiev 1462af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1463af3db60aSLazar Alexei vring_index); 14643d4bde15SVladimir Kondratiev 14653d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14663d4bde15SVladimir Kondratiev return -EINVAL; 14673d4bde15SVladimir Kondratiev 14683d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14693d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14703d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14713d4bde15SVladimir Kondratiev * this is the initial check only. 14723d4bde15SVladimir Kondratiev */ 14733d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14743d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14753d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14763d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14773d4bde15SVladimir Kondratiev return -ENOMEM; 14783d4bde15SVladimir Kondratiev } 14793d4bde15SVladimir Kondratiev 14803d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14813d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14823d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14833d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14843d4bde15SVladimir Kondratiev 14853d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14863d4bde15SVladimir Kondratiev switch (gso_type) { 14873d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14883d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14893d4bde15SVladimir Kondratiev * as required by the offloading doc 14903d4bde15SVladimir Kondratiev */ 14913d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14923d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14933d4bde15SVladimir Kondratiev is_ipv4 = true; 14943d4bde15SVladimir Kondratiev break; 14953d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14963d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14973d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14983d4bde15SVladimir Kondratiev is_ipv4 = false; 14993d4bde15SVladimir Kondratiev break; 15003d4bde15SVladimir Kondratiev default: 15013d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15023d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15033d4bde15SVladimir Kondratiev */ 15043d4bde15SVladimir Kondratiev return -EINVAL; 15053d4bde15SVladimir Kondratiev } 15063d4bde15SVladimir Kondratiev 15073d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15083d4bde15SVladimir Kondratiev return -EINVAL; 15093d4bde15SVladimir Kondratiev 15103d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15113d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15123d4bde15SVladimir Kondratiev */ 15133d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15143d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15153d4bde15SVladimir Kondratiev 15163d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 15173d4bde15SVladimir Kondratiev 15183d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15193d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15203d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15213d4bde15SVladimir Kondratiev goto err_exit; 15223d4bde15SVladimir Kondratiev } 15233d4bde15SVladimir Kondratiev 15243d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 15253d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15263d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15273d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15283d4bde15SVladimir Kondratiev 15293d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15303d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15313d4bde15SVladimir Kondratiev 15323d4bde15SVladimir Kondratiev descs_used++; 15333d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15343d4bde15SVladimir Kondratiev 15353d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15363d4bde15SVladimir Kondratiev if (headlen) { 15373d4bde15SVladimir Kondratiev len = headlen; 15383d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15393d4bde15SVladimir Kondratiev len); 15403d4bde15SVladimir Kondratiev } else { 15413d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15423d4bde15SVladimir Kondratiev len = frag->size; 15433d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15443d4bde15SVladimir Kondratiev } 15453d4bde15SVladimir Kondratiev 15463d4bde15SVladimir Kondratiev while (len) { 15473d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15483d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15493d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15503d4bde15SVladimir Kondratiev 15513d4bde15SVladimir Kondratiev if (descs_used == avail) { 1552e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1553e3d2ed94SHamad Kadmany rc = -ENOMEM; 1554e3d2ed94SHamad Kadmany goto mem_error; 15553d4bde15SVladimir Kondratiev } 15563d4bde15SVladimir Kondratiev 15573d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15583d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15593d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15603d4bde15SVladimir Kondratiev 15613d4bde15SVladimir Kondratiev if (!headlen) { 15623d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15633d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15643d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15653d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15663d4bde15SVladimir Kondratiev } else { 15673d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15683d4bde15SVladimir Kondratiev skb->data + 15693d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15703d4bde15SVladimir Kondratiev lenmss, 15713d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15723d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15733d4bde15SVladimir Kondratiev headlen -= lenmss; 15743d4bde15SVladimir Kondratiev } 15753d4bde15SVladimir Kondratiev 1576e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1577e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1578e3d2ed94SHamad Kadmany goto mem_error; 1579e3d2ed94SHamad Kadmany } 15803d4bde15SVladimir Kondratiev 15813d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15823d4bde15SVladimir Kondratiev 15833d4bde15SVladimir Kondratiev if (!_first_desc) { 15843d4bde15SVladimir Kondratiev _first_desc = _desc; 15853d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15863d4bde15SVladimir Kondratiev d = first_desc; 15873d4bde15SVladimir Kondratiev } else { 15883d4bde15SVladimir Kondratiev d = &desc_mem; 15893d4bde15SVladimir Kondratiev } 15903d4bde15SVladimir Kondratiev 15913d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 15923d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15933d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15943d4bde15SVladimir Kondratiev skb_net_hdr_len); 15953d4bde15SVladimir Kondratiev 15963d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15973d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15983d4bde15SVladimir Kondratiev 15993d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16003d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16013d4bde15SVladimir Kondratiev len -= lenmss; 16023d4bde15SVladimir Kondratiev rem_data -= lenmss; 16033d4bde15SVladimir Kondratiev 16043d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16053d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16063d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16073d4bde15SVladimir Kondratiev 16083d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16093d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16103d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16113d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16123d4bde15SVladimir Kondratiev * release 16133d4bde15SVladimir Kondratiev */ 16143d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16153d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16163d4bde15SVladimir Kondratiev sg_desc_cnt + 16173d4bde15SVladimir Kondratiev 1); 16183d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16193d4bde15SVladimir Kondratiev } else { 16203d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16213d4bde15SVladimir Kondratiev sg_desc_cnt); 16223d4bde15SVladimir Kondratiev } 16233d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16243d4bde15SVladimir Kondratiev 16253d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16263d4bde15SVladimir Kondratiev 16273d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16283d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16293d4bde15SVladimir Kondratiev * it twice 16303d4bde15SVladimir Kondratiev */ 16313d4bde15SVladimir Kondratiev if (first_desc != d) 16323d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16333d4bde15SVladimir Kondratiev 16343d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16353d4bde15SVladimir Kondratiev * of this TS processing 16363d4bde15SVladimir Kondratiev */ 16373d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16383d4bde15SVladimir Kondratiev *_desc = *d; 16393d4bde15SVladimir Kondratiev 16403d4bde15SVladimir Kondratiev rem_data = mss; 16413d4bde15SVladimir Kondratiev _first_desc = NULL; 16423d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16433d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16443d4bde15SVladimir Kondratiev *_desc = *d; 16453d4bde15SVladimir Kondratiev } 16463d4bde15SVladimir Kondratiev } 16473d4bde15SVladimir Kondratiev 16483d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16493d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16503d4bde15SVladimir Kondratiev */ 16513d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16523d4bde15SVladimir Kondratiev d = first_desc; 16533d4bde15SVladimir Kondratiev 16543d4bde15SVladimir Kondratiev /* Last data descriptor */ 16553d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16563d4bde15SVladimir Kondratiev *_desc = *d; 16573d4bde15SVladimir Kondratiev 16583d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16593d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16603d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16613d4bde15SVladimir Kondratiev 16623d4bde15SVladimir Kondratiev /* hold reference to skb 16633d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16643d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16653d4bde15SVladimir Kondratiev */ 16663d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16673d4bde15SVladimir Kondratiev 16683d4bde15SVladimir Kondratiev /* performance monitoring */ 16693d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 167038d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 16713d4bde15SVladimir Kondratiev used, used + descs_used)) { 16723d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16733d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16743d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16753d4bde15SVladimir Kondratiev } 16763d4bde15SVladimir Kondratiev 1677eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1678eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1679eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1680eb26cff1SMaya Erez * skb before it was completed. 1681eb26cff1SMaya Erez */ 1682eb26cff1SMaya Erez wmb(); 1683eb26cff1SMaya Erez 16843d4bde15SVladimir Kondratiev /* advance swhead */ 16853d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1686e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16873d4bde15SVladimir Kondratiev 16883d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16893d4bde15SVladimir Kondratiev * committing them to HW 16903d4bde15SVladimir Kondratiev */ 16913d4bde15SVladimir Kondratiev wmb(); 16923d4bde15SVladimir Kondratiev 1693b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16943d4bde15SVladimir Kondratiev return 0; 16953d4bde15SVladimir Kondratiev 1696e3d2ed94SHamad Kadmany mem_error: 16973d4bde15SVladimir Kondratiev while (descs_used > 0) { 16983d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16993d4bde15SVladimir Kondratiev 1700a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 17013d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 17023d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 17033d4bde15SVladimir Kondratiev *d = *_desc; 17043d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17053d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17063d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 17073d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17083d4bde15SVladimir Kondratiev descs_used--; 17093d4bde15SVladimir Kondratiev } 17103d4bde15SVladimir Kondratiev err_exit: 1711e3d2ed94SHamad Kadmany return rc; 17123d4bde15SVladimir Kondratiev } 17133d4bde15SVladimir Kondratiev 17145933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17152be7d22fSVladimir Kondratiev struct sk_buff *skb) 17162be7d22fSVladimir Kondratiev { 17172be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 171868ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 171968ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17202be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 17212be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 17222be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1723504937d4SKirshenbaum Erez uint f = 0; 17242be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17257c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17262be7d22fSVladimir Kondratiev uint i = swhead; 17272be7d22fSVladimir Kondratiev dma_addr_t pa; 17280436fd9aSVladimir Shulman int used; 172941d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 173041d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17312be7d22fSVladimir Kondratiev 1732af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring: %d bytes to vring %d\n", skb->len, 1733af3db60aSLazar Alexei vring_index); 17342be7d22fSVladimir Kondratiev 17355933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17365933a06dSVladimir Kondratiev return -EINVAL; 17375933a06dSVladimir Kondratiev 173833c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 173970801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17405b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17415b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 17422be7d22fSVladimir Kondratiev return -ENOMEM; 17432be7d22fSVladimir Kondratiev } 17448fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17452be7d22fSVladimir Kondratiev 17468fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17472be7d22fSVladimir Kondratiev 17485b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 17495b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17507743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17512be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17522be7d22fSVladimir Kondratiev 17532be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17542be7d22fSVladimir Kondratiev return -EINVAL; 17552232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 17562be7d22fSVladimir Kondratiev /* 1-st segment */ 175741d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 175841d6b093SVladimir Kondratiev if (unlikely(mcast)) { 175941d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1760230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 176141d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 176241d6b093SVladimir Kondratiev } 1763504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17643d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17655b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1766504937d4SKirshenbaum Erez vring_index); 1767504937d4SKirshenbaum Erez goto dma_error; 1768504937d4SKirshenbaum Erez } 1769504937d4SKirshenbaum Erez 1770c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 17713d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 177268ada71eSVladimir Kondratiev 17732be7d22fSVladimir Kondratiev /* middle segments */ 1774504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17752be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17762be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17772be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17788fe59627SVladimir Kondratiev 1779e59d16c0SVladimir Kondratiev *_d = *d; 17805b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17815b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17825b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17832be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 17848fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17852be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17862be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1787e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1788e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1789e3d2ed94SHamad Kadmany vring_index); 17902be7d22fSVladimir Kondratiev goto dma_error; 1791e3d2ed94SHamad Kadmany } 17922232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 179399b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1794c236658fSVladimir Kondratiev /* no need to check return code - 1795c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1796c236658fSVladimir Kondratiev * it will succeed here too 1797c236658fSVladimir Kondratiev */ 17983d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17992be7d22fSVladimir Kondratiev } 18002be7d22fSVladimir Kondratiev /* for the last seg only */ 18012be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1802668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18032be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 180468ada71eSVladimir Kondratiev *_d = *d; 18055b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 18065b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18075b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18082be7d22fSVladimir Kondratiev 18096cdadd4dSVladimir Kondratiev /* hold reference to skb 18106cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18116cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18126cdadd4dSVladimir Kondratiev */ 18136cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 18146cdadd4dSVladimir Kondratiev 18150436fd9aSVladimir Shulman /* performance monitoring */ 18160436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 181738d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 18180436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18197c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18200436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18210436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 18220436fd9aSVladimir Shulman } 18237c0acf86SVladimir Kondratiev 1824eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1825eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1826eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1827eb26cff1SMaya Erez * skb before it was completed. 1828eb26cff1SMaya Erez */ 1829eb26cff1SMaya Erez wmb(); 1830eb26cff1SMaya Erez 18312be7d22fSVladimir Kondratiev /* advance swhead */ 18322be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 18335b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 18345b29c573SVladimir Kondratiev vring->swhead); 183598658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 18363d4bde15SVladimir Kondratiev 18373d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18383d4bde15SVladimir Kondratiev * committing them to HW 18393d4bde15SVladimir Kondratiev */ 18403d4bde15SVladimir Kondratiev wmb(); 18413d4bde15SVladimir Kondratiev 1842b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 18432be7d22fSVladimir Kondratiev 18442be7d22fSVladimir Kondratiev return 0; 18452be7d22fSVladimir Kondratiev dma_error: 18462be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1847c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1848c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1849c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18507e594444SVladimir Kondratiev 18512be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1852c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 18538fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 185468ada71eSVladimir Kondratiev *d = *_d; 185568ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18562232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1857f88f113aSVladimir Kondratiev 1858f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18592be7d22fSVladimir Kondratiev } 18602be7d22fSVladimir Kondratiev 18612be7d22fSVladimir Kondratiev return -EINVAL; 18622be7d22fSVladimir Kondratiev } 18632be7d22fSVladimir Kondratiev 18645933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 18655933a06dSVladimir Kondratiev struct sk_buff *skb) 18665933a06dSVladimir Kondratiev { 18675933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 18685933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 18695933a06dSVladimir Kondratiev int rc; 18705933a06dSVladimir Kondratiev 18715933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18723d4bde15SVladimir Kondratiev 1873fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1874fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1875fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1876fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1877fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1878fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1879fe9ee51eSMaya Erez return -EINVAL; 1880fe9ee51eSMaya Erez } 1881fe9ee51eSMaya Erez 18823d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 18833d4bde15SVladimir Kondratiev (wil, vring, skb); 18843d4bde15SVladimir Kondratiev 18855933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 18863d4bde15SVladimir Kondratiev 18875933a06dSVladimir Kondratiev return rc; 18885933a06dSVladimir Kondratiev } 18895933a06dSVladimir Kondratiev 1890f9e3033fSDedy Lansky /** 1891f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 1892f9e3033fSDedy Lansky * 1893f9e3033fSDedy Lansky * This function does one of two checks: 1894f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1895f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1896f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1897f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1898f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1899f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1900f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1901f9e3033fSDedy Lansky * 1902f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1903f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1904f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1905f9e3033fSDedy Lansky */ 1906f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 1907f9e3033fSDedy Lansky struct vring *vring, 1908f9e3033fSDedy Lansky bool check_stop) 1909f9e3033fSDedy Lansky { 1910f9e3033fSDedy Lansky int i; 1911f9e3033fSDedy Lansky 1912f9e3033fSDedy Lansky if (vring) 1913f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d, check_stop=%d, stopped=%d", 1914f9e3033fSDedy Lansky (int)(vring - wil->vring_tx), check_stop, 1915f9e3033fSDedy Lansky wil->net_queue_stopped); 1916f9e3033fSDedy Lansky else 1917f9e3033fSDedy Lansky wil_dbg_txrx(wil, "check_stop=%d, stopped=%d", 1918f9e3033fSDedy Lansky check_stop, wil->net_queue_stopped); 1919f9e3033fSDedy Lansky 1920f9e3033fSDedy Lansky if (check_stop == wil->net_queue_stopped) 1921f9e3033fSDedy Lansky /* net queues already in desired state */ 1922f9e3033fSDedy Lansky return; 1923f9e3033fSDedy Lansky 1924f9e3033fSDedy Lansky if (check_stop) { 1925f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1926f9e3033fSDedy Lansky /* not enough room in the vring */ 1927f9e3033fSDedy Lansky netif_tx_stop_all_queues(wil_to_ndev(wil)); 1928f9e3033fSDedy Lansky wil->net_queue_stopped = true; 1929f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1930f9e3033fSDedy Lansky } 1931f9e3033fSDedy Lansky return; 1932f9e3033fSDedy Lansky } 1933f9e3033fSDedy Lansky 1934fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1935fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1936fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1937fe9ee51eSMaya Erez return; 1938fe9ee51eSMaya Erez 1939f9e3033fSDedy Lansky /* check wake */ 1940f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1941f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1942f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1943f9e3033fSDedy Lansky 1944f9e3033fSDedy Lansky if (!cur_vring->va || !txdata->enabled || cur_vring == vring) 1945f9e3033fSDedy Lansky continue; 1946f9e3033fSDedy Lansky 1947f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1948f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1949f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1950f9e3033fSDedy Lansky return; 1951f9e3033fSDedy Lansky } 1952f9e3033fSDedy Lansky } 1953f9e3033fSDedy Lansky 1954f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1955f9e3033fSDedy Lansky /* enough room in the vring */ 1956f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 1957f9e3033fSDedy Lansky netif_tx_wake_all_queues(wil_to_ndev(wil)); 1958f9e3033fSDedy Lansky wil->net_queue_stopped = false; 1959f9e3033fSDedy Lansky } 1960f9e3033fSDedy Lansky } 1961f9e3033fSDedy Lansky 1962f9e3033fSDedy Lansky void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring, 1963f9e3033fSDedy Lansky bool check_stop) 1964f9e3033fSDedy Lansky { 1965f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 1966f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1967f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1968f9e3033fSDedy Lansky } 1969f9e3033fSDedy Lansky 1970f9e3033fSDedy Lansky void wil_update_net_queues_bh(struct wil6210_priv *wil, struct vring *vring, 1971f9e3033fSDedy Lansky bool check_stop) 1972f9e3033fSDedy Lansky { 1973f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 1974f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1975f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1976f9e3033fSDedy Lansky } 1977f9e3033fSDedy Lansky 19782be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19792be7d22fSVladimir Kondratiev { 19802be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 19813df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 198241d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 19832be7d22fSVladimir Kondratiev struct vring *vring; 1984aa27deaaSVladimir Kondratiev static bool pr_once_fw; 19852be7d22fSVladimir Kondratiev int rc; 19862be7d22fSVladimir Kondratiev 1987af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 198833c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1989aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 19902be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1991aa27deaaSVladimir Kondratiev pr_once_fw = true; 1992aa27deaaSVladimir Kondratiev } 19932be7d22fSVladimir Kondratiev goto drop; 19942be7d22fSVladimir Kondratiev } 199533c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1996d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 19972be7d22fSVladimir Kondratiev goto drop; 19982be7d22fSVladimir Kondratiev } 199933c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 20002be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20012be7d22fSVladimir Kondratiev goto drop; 20022be7d22fSVladimir Kondratiev } 2003aa27deaaSVladimir Kondratiev pr_once_fw = false; 2004d58db4e4SVladimir Kondratiev 20052be7d22fSVladimir Kondratiev /* find vring */ 2006a895cb8bSLior David if (wil->wdev->iftype == NL80211_IFTYPE_STATION && !wil->pbss) { 2007a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 200854ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 2009a895cb8bSLior David } else if (bcast) { 2010a895cb8bSLior David if (wil->pbss) 2011a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2012a895cb8bSLior David * all stations VRINGs 2013a895cb8bSLior David */ 2014a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 2015a895cb8bSLior David else if (wil->wdev->iftype == NL80211_IFTYPE_AP) 2016a895cb8bSLior David /* AP has a dedicated bcast VRING */ 2017a895cb8bSLior David vring = wil_find_tx_bcast_1(wil, skb); 2018a895cb8bSLior David else 2019a895cb8bSLior David /* unexpected combination, fallback to duplicating 2020a895cb8bSLior David * the skb in all stations VRINGs 2021a895cb8bSLior David */ 2022a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 2023a895cb8bSLior David } else { 2024a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 2025a895cb8bSLior David vring = wil_find_tx_ucast(wil, skb); 202654ed90a8SVladimir Kondratiev } 202733c477fdSVladimir Kondratiev if (unlikely(!vring)) { 20285aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 20292be7d22fSVladimir Kondratiev goto drop; 20302be7d22fSVladimir Kondratiev } 20312be7d22fSVladimir Kondratiev /* set up vring entry */ 20322be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 2033d58db4e4SVladimir Kondratiev 20342be7d22fSVladimir Kondratiev switch (rc) { 20352be7d22fSVladimir Kondratiev case 0: 2036f9e3033fSDedy Lansky /* shall we stop net queues? */ 2037f9e3033fSDedy Lansky wil_update_net_queues_bh(wil, vring, true); 2038795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20392be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20402be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20412be7d22fSVladimir Kondratiev case -ENOMEM: 20422be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20432be7d22fSVladimir Kondratiev default: 2044afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20452be7d22fSVladimir Kondratiev } 20462be7d22fSVladimir Kondratiev drop: 20472be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20482be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20492be7d22fSVladimir Kondratiev 20502be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20512be7d22fSVladimir Kondratiev } 20522be7d22fSVladimir Kondratiev 2053713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 2054713c8a29SVladimir Kondratiev { 2055713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 2056713c8a29SVladimir Kondratiev 2057713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 2058713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 2059713c8a29SVladimir Kondratiev } 2060713c8a29SVladimir Kondratiev 2061713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 2062713c8a29SVladimir Kondratiev { 2063713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 2064713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 2065713c8a29SVladimir Kondratiev else 2066713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 2067713c8a29SVladimir Kondratiev } 2068713c8a29SVladimir Kondratiev 20692be7d22fSVladimir Kondratiev /** 20702be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 20712be7d22fSVladimir Kondratiev * 2072e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2073e0287c4aSVladimir Kondratiev * 20742be7d22fSVladimir Kondratiev * Safe to call from IRQ 20752be7d22fSVladimir Kondratiev */ 2076e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 20772be7d22fSVladimir Kondratiev { 2078795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 20792be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 20802be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 2081097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 2082e0287c4aSVladimir Kondratiev int done = 0; 2083c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 208441d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2085c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20860436fd9aSVladimir Shulman int used_before_complete; 20870436fd9aSVladimir Shulman int used_new; 20882be7d22fSVladimir Kondratiev 208933c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 20902be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2091e0287c4aSVladimir Kondratiev return 0; 20922be7d22fSVladimir Kondratiev } 20932be7d22fSVladimir Kondratiev 209433c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2095097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2096097638a0SVladimir Kondratiev return 0; 2097097638a0SVladimir Kondratiev } 2098097638a0SVladimir Kondratiev 2099af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21002be7d22fSVladimir Kondratiev 21010436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 21020436fd9aSVladimir Shulman 210341d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 210441d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 210541d6b093SVladimir Kondratiev 21062be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 2107c236658fSVladimir Kondratiev int new_swtail; 2108c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2109c236658fSVladimir Kondratiev /** 2110c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21113d4bde15SVladimir Kondratiev * last fragment. look for it. 21123d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2113c236658fSVladimir Kondratiev */ 2114c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2115c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2116c236658fSVladimir Kondratiev 2117c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 211833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2119c236658fSVladimir Kondratiev break; 2120c236658fSVladimir Kondratiev 2121c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2122c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21234de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21247e594444SVladimir Kondratiev u16 dmalen; 212576dfa4b7SVladimir Kondratiev struct sk_buff *skb; 212676dfa4b7SVladimir Kondratiev 212776dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 212876dfa4b7SVladimir Kondratiev skb = ctx->skb; 2129c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 21304de41befSVladimir Kondratiev 213168ada71eSVladimir Kondratiev *d = *_d; 21324de41befSVladimir Kondratiev 21337e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 213498658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 213598658095SVladimir Kondratiev d->dma.error); 21367743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21375b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21385b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21395b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21405b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21412be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21422be7d22fSVladimir Kondratiev 21432232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2144f88f113aSVladimir Kondratiev 21452be7d22fSVladimir Kondratiev if (skb) { 214633c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2147795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2148795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 214941d6b093SVladimir Kondratiev if (stats) { 215041d6b093SVladimir Kondratiev stats->tx_packets++; 2151c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 215241d6b093SVladimir Kondratiev } 2153795ce734SVladimir Kondratiev } else { 2154795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 215541d6b093SVladimir Kondratiev if (stats) 2156c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2157795ce734SVladimir Kondratiev } 2158713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21592be7d22fSVladimir Kondratiev } 2160f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2161eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2162eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2163eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2164eb26cff1SMaya Erez * is completed. 2165eb26cff1SMaya Erez */ 2166eb26cff1SMaya Erez wmb(); 2167c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 216803269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 216903269c65SVladimir Kondratiev * so hardware will not try to process this desc., 217003269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 217103269c65SVladimir Kondratiev */ 21722be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2173e0287c4aSVladimir Kondratiev done++; 21742be7d22fSVladimir Kondratiev } 2175c236658fSVladimir Kondratiev } 217667c3e1b4SVladimir Kondratiev 21770436fd9aSVladimir Shulman /* performance monitoring */ 21780436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 217938d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 21800436fd9aSVladimir Shulman used_new, used_before_complete)) { 21810436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21820436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 21837c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 21847c0acf86SVladimir Kondratiev } 218567c3e1b4SVladimir Kondratiev 2186f9e3033fSDedy Lansky /* shall we wake net queues? */ 2187f9e3033fSDedy Lansky if (done) 2188f9e3033fSDedy Lansky wil_update_net_queues(wil, vring, false); 2189e0287c4aSVladimir Kondratiev 2190e0287c4aSVladimir Kondratiev return done; 21912be7d22fSVladimir Kondratiev } 2192