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, 181f2de576dSHamad Kadmany * if we are using 48 bit addresses switch to 32 bit allocation 182f2de576dSHamad Kadmany * 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 */ 188f2de576dSHamad Kadmany if (wil->use_extended_dma_addr) 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 198f2de576dSHamad Kadmany if (wil->use_extended_dma_addr) 199f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); 200f2de576dSHamad Kadmany 2012be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 2022be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 2032be7d22fSVladimir Kondratiev * we can use any 2042be7d22fSVladimir Kondratiev */ 2052be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 2068fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 2078fe59627SVladimir Kondratiev 20868ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 2092be7d22fSVladimir Kondratiev } 2102be7d22fSVladimir Kondratiev 21139c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 21239c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 2132be7d22fSVladimir Kondratiev 2142be7d22fSVladimir Kondratiev return 0; 2152be7d22fSVladimir Kondratiev } 2162be7d22fSVladimir Kondratiev 2172232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 2182232abd5SVladimir Kondratiev struct wil_ctx *ctx) 2192232abd5SVladimir Kondratiev { 2202232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 2212232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 2228fe59627SVladimir Kondratiev 2232232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 2242232abd5SVladimir Kondratiev case wil_mapped_as_single: 2252232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 2262232abd5SVladimir Kondratiev break; 2272232abd5SVladimir Kondratiev case wil_mapped_as_page: 2282232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 2292232abd5SVladimir Kondratiev break; 2302232abd5SVladimir Kondratiev default: 2312232abd5SVladimir Kondratiev break; 2322232abd5SVladimir Kondratiev } 2332232abd5SVladimir Kondratiev } 2342232abd5SVladimir Kondratiev 2352be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 2362be7d22fSVladimir Kondratiev int tx) 2372be7d22fSVladimir Kondratiev { 2382be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2392be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2402be7d22fSVladimir Kondratiev 2419b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 242ef77285fSVladimir Kondratiev if (tx) { 243ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 244ef77285fSVladimir Kondratiev 245ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 246ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 247ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 248ef77285fSVladimir Kondratiev } else { 249ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 250ef77285fSVladimir Kondratiev vring->size, vring->va, 251ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 252ef77285fSVladimir Kondratiev } 253ef77285fSVladimir Kondratiev 2542be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 25568ada71eSVladimir Kondratiev dma_addr_t pa; 2567e594444SVladimir Kondratiev u16 dmalen; 257f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 25868ada71eSVladimir Kondratiev 2592be7d22fSVladimir Kondratiev if (tx) { 26068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 26168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 2622be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 26368ada71eSVladimir Kondratiev 264f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 26534b8886eSMaya Erez if (!ctx) { 26634b8886eSMaya Erez wil_dbg_txrx(wil, 26734b8886eSMaya Erez "ctx(%d) was already completed\n", 26834b8886eSMaya Erez vring->swtail); 26934b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 27034b8886eSMaya Erez continue; 27134b8886eSMaya Erez } 27268ada71eSVladimir Kondratiev *d = *_d; 2732232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 274f88f113aSVladimir Kondratiev if (ctx->skb) 275f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 2762be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2772be7d22fSVladimir Kondratiev } else { /* rx */ 27868ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 27968ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2804d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 28168ada71eSVladimir Kondratiev 282f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 28368ada71eSVladimir Kondratiev *d = *_d; 28468ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2857e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2867e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 287f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2882be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2892be7d22fSVladimir Kondratiev } 2902be7d22fSVladimir Kondratiev } 2912be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2922be7d22fSVladimir Kondratiev kfree(vring->ctx); 2932be7d22fSVladimir Kondratiev vring->pa = 0; 2942be7d22fSVladimir Kondratiev vring->va = NULL; 2952be7d22fSVladimir Kondratiev vring->ctx = NULL; 2962be7d22fSVladimir Kondratiev } 2972be7d22fSVladimir Kondratiev 2982be7d22fSVladimir Kondratiev /** 2992be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 3002be7d22fSVladimir Kondratiev * 3012be7d22fSVladimir Kondratiev * Safe to call from IRQ 3022be7d22fSVladimir Kondratiev */ 3032be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 3042be7d22fSVladimir Kondratiev u32 i, int headroom) 3052be7d22fSVladimir Kondratiev { 3062be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 30752a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 30868ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 3098fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 3102be7d22fSVladimir Kondratiev dma_addr_t pa; 3112be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 3128fe59627SVladimir Kondratiev 3132be7d22fSVladimir Kondratiev if (unlikely(!skb)) 3142be7d22fSVladimir Kondratiev return -ENOMEM; 3152be7d22fSVladimir Kondratiev 3162be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 3172be7d22fSVladimir Kondratiev skb_put(skb, sz); 3182be7d22fSVladimir Kondratiev 3192be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 3202be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 3212be7d22fSVladimir Kondratiev kfree_skb(skb); 3222be7d22fSVladimir Kondratiev return -ENOMEM; 3232be7d22fSVladimir Kondratiev } 3242be7d22fSVladimir Kondratiev 32548c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 32668ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 3272be7d22fSVladimir Kondratiev /* ip_length don't care */ 3282be7d22fSVladimir Kondratiev /* b11 don't care */ 3292be7d22fSVladimir Kondratiev /* error don't care */ 3302be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3317e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 33268ada71eSVladimir Kondratiev *_d = *d; 333f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3342be7d22fSVladimir Kondratiev 3352be7d22fSVladimir Kondratiev return 0; 3362be7d22fSVladimir Kondratiev } 3372be7d22fSVladimir Kondratiev 3382be7d22fSVladimir Kondratiev /** 3392be7d22fSVladimir Kondratiev * Adds radiotap header 3402be7d22fSVladimir Kondratiev * 3412be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3422be7d22fSVladimir Kondratiev * 3432be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3442be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3452be7d22fSVladimir Kondratiev * - Phy info 3462be7d22fSVladimir Kondratiev */ 3472be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 34833e61169SVladimir Kondratiev struct sk_buff *skb) 3492be7d22fSVladimir Kondratiev { 3502be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 3512be7d22fSVladimir Kondratiev struct wil6210_rtap { 3522be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3532be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3542be7d22fSVladimir Kondratiev /* flags */ 3552be7d22fSVladimir Kondratiev u8 flags; 3562be7d22fSVladimir Kondratiev /* channel */ 3572be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3582be7d22fSVladimir Kondratiev __le16 chnl_flags; 3592be7d22fSVladimir Kondratiev /* MCS */ 3602be7d22fSVladimir Kondratiev u8 mcs_present; 3612be7d22fSVladimir Kondratiev u8 mcs_flags; 3622be7d22fSVladimir Kondratiev u8 mcs_index; 3632be7d22fSVladimir Kondratiev } __packed; 3642be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3652be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3662be7d22fSVladimir Kondratiev /* vendor */ 3672be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3682be7d22fSVladimir Kondratiev u8 vendor_ns; 3692be7d22fSVladimir Kondratiev __le16 vendor_skip; 3702be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3712be7d22fSVladimir Kondratiev } __packed; 37233e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3732be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3742be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3752be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3762be7d22fSVladimir Kondratiev static char phy_data[128]; 3772be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 3782be7d22fSVladimir Kondratiev 3792be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3802be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3812be7d22fSVladimir Kondratiev /* calculate additional length */ 3822be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3832be7d22fSVladimir Kondratiev /** 3842be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3852be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3862be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3872be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3882be7d22fSVladimir Kondratiev */ 3892be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3902be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3918fe59627SVladimir Kondratiev 3922be7d22fSVladimir Kondratiev if (len > 8) { 3932be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3942be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3958fe59627SVladimir Kondratiev 3962be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3972be7d22fSVladimir Kondratiev phy_length = len - 8; 3982be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3992be7d22fSVladimir Kondratiev } 4002be7d22fSVladimir Kondratiev } 4012be7d22fSVladimir Kondratiev } 4022be7d22fSVladimir Kondratiev rtap_len += phy_length; 4032be7d22fSVladimir Kondratiev } 4042be7d22fSVladimir Kondratiev 4052be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 4062be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 4079165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 4082be7d22fSVladimir Kondratiev return; 4092be7d22fSVladimir Kondratiev } 4102be7d22fSVladimir Kondratiev 411d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 4122be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 4132be7d22fSVladimir Kondratiev 4142be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 4152be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 4162be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 4172be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 4182be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 4192be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 4202be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 4212be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 4222be7d22fSVladimir Kondratiev 4232be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 4242be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 4252be7d22fSVladimir Kondratiev 4262be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 4272be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 4282be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 4292be7d22fSVladimir Kondratiev 4302be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 4312be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 4322be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 4332be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 4342be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 4352be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 4362be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4372be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4382be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4392be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4402be7d22fSVladimir Kondratiev phy_length); 4412be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4422be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4432be7d22fSVladimir Kondratiev phy_length); 4442be7d22fSVladimir Kondratiev } 4452be7d22fSVladimir Kondratiev } 4462be7d22fSVladimir Kondratiev 447a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 448a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 449a8313341SVladimir Kondratiev { 450a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 451a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 452a8313341SVladimir Kondratiev } 453a8313341SVladimir Kondratiev 454fe9ee51eSMaya Erez bool wil_is_rx_idle(struct wil6210_priv *wil) 455fe9ee51eSMaya Erez { 456fe9ee51eSMaya Erez struct vring_rx_desc *_d; 457fe9ee51eSMaya Erez struct vring *vring = &wil->vring_rx; 458fe9ee51eSMaya Erez 459fe9ee51eSMaya Erez _d = (struct vring_rx_desc *)&vring->va[vring->swhead].rx; 460fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 461fe9ee51eSMaya Erez return false; 462fe9ee51eSMaya Erez 463fe9ee51eSMaya Erez return true; 464fe9ee51eSMaya Erez } 465fe9ee51eSMaya Erez 4662be7d22fSVladimir Kondratiev /** 4672be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4682be7d22fSVladimir Kondratiev * 46933e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 47033e61169SVladimir Kondratiev * 4712be7d22fSVladimir Kondratiev * Safe to call from IRQ 4722be7d22fSVladimir Kondratiev */ 4732be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 4742be7d22fSVladimir Kondratiev struct vring *vring) 4752be7d22fSVladimir Kondratiev { 4762be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4772be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 47868ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 47968ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4802be7d22fSVladimir Kondratiev struct sk_buff *skb; 4812be7d22fSVladimir Kondratiev dma_addr_t pa; 482c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 48352a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4847e594444SVladimir Kondratiev u16 dmalen; 4852be7d22fSVladimir Kondratiev u8 ftype; 486c8b78b5fSVladimir Kondratiev int cid; 4873b282bc6SVladimir Kondratiev int i; 488c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 489c8b78b5fSVladimir Kondratiev 49033e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 49133e61169SVladimir Kondratiev 4923b282bc6SVladimir Kondratiev again: 49333c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4942be7d22fSVladimir Kondratiev return NULL; 4952be7d22fSVladimir Kondratiev 4963b282bc6SVladimir Kondratiev i = (int)vring->swhead; 497148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 49833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4992be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 5002be7d22fSVladimir Kondratiev return NULL; 5012be7d22fSVladimir Kondratiev } 5022be7d22fSVladimir Kondratiev 503148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 504148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 505148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 506148416a9SVladimir Kondratiev if (!skb) { 507148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 5083b282bc6SVladimir Kondratiev goto again; 509148416a9SVladimir Kondratiev } 51068ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 51168ada71eSVladimir Kondratiev *d = *_d; 51268ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 51368ada71eSVladimir Kondratiev 51468ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 51568ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 51668ada71eSVladimir Kondratiev 517148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 518148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 519a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 52068ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 52168ada71eSVladimir Kondratiev 5223b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 5233b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 5243b282bc6SVladimir Kondratiev 52533c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 526e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5273b282bc6SVladimir Kondratiev stats->rx_large_frame++; 528110dea00SWei Yongjun kfree_skb(skb); 5293b282bc6SVladimir Kondratiev goto again; 530e270045bSVladimir Kondratiev } 5317e594444SVladimir Kondratiev skb_trim(skb, dmalen); 53233e61169SVladimir Kondratiev 5331cbbcb08SVladimir Kondratiev prefetch(skb->data); 5341cbbcb08SVladimir Kondratiev 535c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 536c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 537c0d37713SVladimir Kondratiev 538c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 539c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 540c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5412be7d22fSVladimir Kondratiev 5422be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5432be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 54433e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5452be7d22fSVladimir Kondratiev 5462be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5472be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5482be7d22fSVladimir Kondratiev return skb; 549a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5502be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5512be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5522be7d22fSVladimir Kondratiev */ 55368ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 55433c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 555a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 556a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 557a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 558a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 559a8313341SVladimir Kondratiev 560a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 561a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 562a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5633b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 564a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 565a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 566a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 567a8313341SVladimir Kondratiev mid, cid, tid, seq); 568a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 569a8313341SVladimir Kondratiev } else { 570a8313341SVladimir Kondratiev /* print again all info. One can enable only this 571a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 572a8313341SVladimir Kondratiev */ 573a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 574a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 575a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 576a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 577a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 578a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 579a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 580a8313341SVladimir Kondratiev } 5812be7d22fSVladimir Kondratiev kfree_skb(skb); 5823b282bc6SVladimir Kondratiev goto again; 5832be7d22fSVladimir Kondratiev } 5842be7d22fSVladimir Kondratiev 585c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5862be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5873b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5882be7d22fSVladimir Kondratiev kfree_skb(skb); 5893b282bc6SVladimir Kondratiev goto again; 5902be7d22fSVladimir Kondratiev } 5912be7d22fSVladimir Kondratiev 592504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 593504937d4SKirshenbaum Erez * and in case of error drop the packet 594504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 595504937d4SKirshenbaum Erez */ 59633c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 597504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 59833c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 599504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 6004a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 6014a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 6024a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 6034a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 6044a68ab10SVladimir Kondratiev */ 605504937d4SKirshenbaum Erez } 606504937d4SKirshenbaum Erez 607c406ea7cSVladimir Kondratiev if (snaplen) { 608c406ea7cSVladimir Kondratiev /* Packet layout 609c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 610c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 611c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 612c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 613c406ea7cSVladimir Kondratiev */ 614c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 615c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 616c406ea7cSVladimir Kondratiev } 617c406ea7cSVladimir Kondratiev 6182be7d22fSVladimir Kondratiev return skb; 6192be7d22fSVladimir Kondratiev } 6202be7d22fSVladimir Kondratiev 6212be7d22fSVladimir Kondratiev /** 6222be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 6232be7d22fSVladimir Kondratiev * buffers posted at @swtail 6242be7d22fSVladimir Kondratiev */ 6252be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6262be7d22fSVladimir Kondratiev { 6272be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 6282be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 6292be7d22fSVladimir Kondratiev u32 next_tail; 6302be7d22fSVladimir Kondratiev int rc = 0; 6312be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6322be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6332be7d22fSVladimir Kondratiev 6342be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 6352be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6362be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6372be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 63833c477fdSVladimir Kondratiev if (unlikely(rc)) { 6392be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 6402be7d22fSVladimir Kondratiev rc, v->swtail); 6412be7d22fSVladimir Kondratiev break; 6422be7d22fSVladimir Kondratiev } 6432be7d22fSVladimir Kondratiev } 644ab6d7cc3SMaya Erez 645ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 646ab6d7cc3SMaya Erez * committing them to HW 647ab6d7cc3SMaya Erez */ 648ab6d7cc3SMaya Erez wmb(); 649ab6d7cc3SMaya Erez 650b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6512be7d22fSVladimir Kondratiev 6522be7d22fSVladimir Kondratiev return rc; 6532be7d22fSVladimir Kondratiev } 6542be7d22fSVladimir Kondratiev 65558527421SVladimir Kondratiev /** 65658527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 65758527421SVladimir Kondratiev * @cs: One area of memory 65858527421SVladimir Kondratiev * @ct: Another area of memory 65958527421SVladimir Kondratiev * @count: The size of the area. 66058527421SVladimir Kondratiev * 66158527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 66258527421SVladimir Kondratiev * with minimal modifications 66358527421SVladimir Kondratiev */ 66458527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 66558527421SVladimir Kondratiev { 66658527421SVladimir Kondratiev const unsigned char *su1, *su2; 66758527421SVladimir Kondratiev int res = 0; 66858527421SVladimir Kondratiev 66958527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 67058527421SVladimir Kondratiev --su1, --su2, count--) { 67158527421SVladimir Kondratiev res = *su1 - *su2; 67258527421SVladimir Kondratiev if (res) 67358527421SVladimir Kondratiev break; 67458527421SVladimir Kondratiev } 67558527421SVladimir Kondratiev return res; 67658527421SVladimir Kondratiev } 67758527421SVladimir Kondratiev 67858527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 67958527421SVladimir Kondratiev { 68058527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 68158527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 68258527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 68358527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 68458527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 68558527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 68658527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 68758527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 68858527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 68958527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 69058527421SVladimir Kondratiev 69158527421SVladimir Kondratiev if (!cc->key_set) { 69258527421SVladimir Kondratiev wil_err_ratelimited(wil, 69358527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 69458527421SVladimir Kondratiev cid, tid, mc, key_id); 69558527421SVladimir Kondratiev return -EINVAL; 69658527421SVladimir Kondratiev } 69758527421SVladimir Kondratiev 69858527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 69958527421SVladimir Kondratiev wil_err_ratelimited(wil, 70058527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 70158527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 70258527421SVladimir Kondratiev return -EINVAL; 70358527421SVladimir Kondratiev } 70458527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 70558527421SVladimir Kondratiev 70658527421SVladimir Kondratiev return 0; 70758527421SVladimir Kondratiev } 70858527421SVladimir Kondratiev 7092be7d22fSVladimir Kondratiev /* 7102be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 711e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 7122be7d22fSVladimir Kondratiev */ 713b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 7142be7d22fSVladimir Kondratiev { 715c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 716c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 717c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 7182be7d22fSVladimir Kondratiev unsigned int len = skb->len; 719c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 72041d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 72158527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 722c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 723c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 724c42da999SVladimir Kondratiev * is not suitable, need to look at data 725c42da999SVladimir Kondratiev */ 726c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 727c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 728c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 729c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 730c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 731c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 732c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 733c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 734c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 735c42da999SVladimir Kondratiev }; 7362be7d22fSVladimir Kondratiev 7370553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7380553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7390553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7400553640dSVladimir Shulman * mechanism, core will be chosen according 7410553640dSVladimir Shulman * to user-level rps configuration. 7420553640dSVladimir Shulman */ 7430553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7440553640dSVladimir Shulman 745241804cbSVladimir Kondratiev skb_orphan(skb); 746241804cbSVladimir Kondratiev 74758527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 74858527421SVladimir Kondratiev rc = GRO_DROP; 74958527421SVladimir Kondratiev dev_kfree_skb(skb); 75058527421SVladimir Kondratiev stats->rx_replay++; 75158527421SVladimir Kondratiev goto stats; 75258527421SVladimir Kondratiev } 75358527421SVladimir Kondratiev 75402beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 755c42da999SVladimir Kondratiev if (mcast) { 756c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 757c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 758c42da999SVladimir Kondratiev */ 759c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 760c42da999SVladimir Kondratiev } else { 761c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 7622be7d22fSVladimir Kondratiev 763c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 764c42da999SVladimir Kondratiev /* The destination station is associated to 765c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 766c42da999SVladimir Kondratiev * directly to it and do not pass it to local 767c42da999SVladimir Kondratiev * net stack. 768c42da999SVladimir Kondratiev */ 769c42da999SVladimir Kondratiev xmit_skb = skb; 770c42da999SVladimir Kondratiev skb = NULL; 771c42da999SVladimir Kondratiev } 772c42da999SVladimir Kondratiev } 773c42da999SVladimir Kondratiev } 774c42da999SVladimir Kondratiev if (xmit_skb) { 775c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 776c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 777c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 778c42da999SVladimir Kondratiev */ 779c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 780c42da999SVladimir Kondratiev xmit_skb->priority += 256; 781c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 782c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 783c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 784c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 785c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 786c42da999SVladimir Kondratiev } 787c42da999SVladimir Kondratiev 788c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 789c42da999SVladimir Kondratiev 790c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 791c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 792c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 793c42da999SVladimir Kondratiev len, gro_res_str[rc]); 794c42da999SVladimir Kondratiev } 79558527421SVladimir Kondratiev stats: 796c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 797b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 798b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 799b5998e6aSVladimir Kondratiev stats->rx_dropped++; 800b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 801b5998e6aSVladimir Kondratiev } else { 8022be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 803c8b78b5fSVladimir Kondratiev stats->rx_packets++; 8042be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 805c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 806c42da999SVladimir Kondratiev if (mcast) 807c42da999SVladimir Kondratiev ndev->stats.multicast++; 808194b482bSVladimir Kondratiev } 8092be7d22fSVladimir Kondratiev } 8102be7d22fSVladimir Kondratiev 8112be7d22fSVladimir Kondratiev /** 8122be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 8132be7d22fSVladimir Kondratiev * 814e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8152be7d22fSVladimir Kondratiev */ 816e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8172be7d22fSVladimir Kondratiev { 8182be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 8192be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 8202be7d22fSVladimir Kondratiev struct sk_buff *skb; 8212be7d22fSVladimir Kondratiev 82233c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8232be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8242be7d22fSVladimir Kondratiev return; 8252be7d22fSVladimir Kondratiev } 826af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 827e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 828e0287c4aSVladimir Kondratiev (*quota)--; 8292be7d22fSVladimir Kondratiev 8302be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 8312be7d22fSVladimir Kondratiev skb->dev = ndev; 8322be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8332be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8342be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8352be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 836b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8372be7d22fSVladimir Kondratiev } else { 838b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8392be7d22fSVladimir Kondratiev } 8402be7d22fSVladimir Kondratiev } 8412be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8422be7d22fSVladimir Kondratiev } 8432be7d22fSVladimir Kondratiev 84452a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 84552a45702SLior David { 84652a45702SLior David wil->rx_buf_len = rx_large_buf ? 84752a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 84852a45702SLior David if (mtu_max > wil->rx_buf_len) { 84952a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 85052a45702SLior David * backward compatibility (mtu_max parameter was also used 85152a45702SLior David * to support receiving large packets) 85252a45702SLior David */ 85352a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 85452a45702SLior David wil->rx_buf_len = mtu_max; 85552a45702SLior David } 85652a45702SLior David } 85752a45702SLior David 858d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 8592be7d22fSVladimir Kondratiev { 8602be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8612be7d22fSVladimir Kondratiev int rc; 8622be7d22fSVladimir Kondratiev 863af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8649cf10d62SVladimir Kondratiev 8658bf6adb9SVladimir Kondratiev if (vring->va) { 8668bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8678bf6adb9SVladimir Kondratiev return -EINVAL; 8688bf6adb9SVladimir Kondratiev } 8698bf6adb9SVladimir Kondratiev 87052a45702SLior David wil_rx_buf_len_init(wil); 87152a45702SLior David 872d3762b40SVladimir Kondratiev vring->size = size; 8732be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8742be7d22fSVladimir Kondratiev if (rc) 8752be7d22fSVladimir Kondratiev return rc; 8762be7d22fSVladimir Kondratiev 87747e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8782be7d22fSVladimir Kondratiev if (rc) 8792be7d22fSVladimir Kondratiev goto err_free; 8802be7d22fSVladimir Kondratiev 8812be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8822be7d22fSVladimir Kondratiev if (rc) 8832be7d22fSVladimir Kondratiev goto err_free; 8842be7d22fSVladimir Kondratiev 8852be7d22fSVladimir Kondratiev return 0; 8862be7d22fSVladimir Kondratiev err_free: 8872be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8882be7d22fSVladimir Kondratiev 8892be7d22fSVladimir Kondratiev return rc; 8902be7d22fSVladimir Kondratiev } 8912be7d22fSVladimir Kondratiev 8922be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 8932be7d22fSVladimir Kondratiev { 8942be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8952be7d22fSVladimir Kondratiev 896af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8979cf10d62SVladimir Kondratiev 8982acb4220SVladimir Kondratiev if (vring->va) 8992be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 9002be7d22fSVladimir Kondratiev } 9012be7d22fSVladimir Kondratiev 902875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 903875e9439SMaya Erez { 904875e9439SMaya Erez spin_lock_bh(&txdata->lock); 905875e9439SMaya Erez txdata->dot1x_open = 0; 906875e9439SMaya Erez txdata->enabled = 0; 907875e9439SMaya Erez txdata->idle = 0; 908875e9439SMaya Erez txdata->last_idle = 0; 909875e9439SMaya Erez txdata->begin = 0; 910875e9439SMaya Erez txdata->agg_wsize = 0; 911875e9439SMaya Erez txdata->agg_timeout = 0; 912875e9439SMaya Erez txdata->agg_amsdu = 0; 913875e9439SMaya Erez txdata->addba_in_progress = false; 914875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 915875e9439SMaya Erez } 916875e9439SMaya Erez 9172be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 9182be7d22fSVladimir Kondratiev int cid, int tid) 9192be7d22fSVladimir Kondratiev { 9202be7d22fSVladimir Kondratiev int rc; 9212be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9222be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9232be7d22fSVladimir Kondratiev .vring_cfg = { 9242be7d22fSVladimir Kondratiev .tx_sw_ring = { 9259a06bec9SVladimir Kondratiev .max_mpdu_size = 926c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 927b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9282be7d22fSVladimir Kondratiev }, 9292be7d22fSVladimir Kondratiev .ringid = id, 930a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9312be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9322be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9332be7d22fSVladimir Kondratiev .to_resolution = 0, 9343277213fSVladimir Kondratiev .agg_max_wsize = 0, 9352be7d22fSVladimir Kondratiev .schd_params = { 9362be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9372be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9382be7d22fSVladimir Kondratiev }, 9392be7d22fSVladimir Kondratiev }, 9402be7d22fSVladimir Kondratiev }; 9412be7d22fSVladimir Kondratiev struct { 942b874ddecSLior David struct wmi_cmd_hdr wmi; 9432be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 9442be7d22fSVladimir Kondratiev } __packed reply; 9452be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 946097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9472be7d22fSVladimir Kondratiev 948af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 949e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9509b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9519cf10d62SVladimir Kondratiev 9522be7d22fSVladimir Kondratiev if (vring->va) { 9532be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9542be7d22fSVladimir Kondratiev rc = -EINVAL; 9552be7d22fSVladimir Kondratiev goto out; 9562be7d22fSVladimir Kondratiev } 9572be7d22fSVladimir Kondratiev 958875e9439SMaya Erez wil_tx_data_init(txdata); 9592be7d22fSVladimir Kondratiev vring->size = size; 9602be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9612be7d22fSVladimir Kondratiev if (rc) 9622be7d22fSVladimir Kondratiev goto out; 9632be7d22fSVladimir Kondratiev 96493ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 96593ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 96693ae6d49SVladimir Kondratiev 9672be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9682be7d22fSVladimir Kondratiev 969230d8442SVladimir Kondratiev if (!wil->privacy) 970230d8442SVladimir Kondratiev txdata->dot1x_open = true; 9712be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 9722be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9732be7d22fSVladimir Kondratiev if (rc) 9742be7d22fSVladimir Kondratiev goto out_free; 9752be7d22fSVladimir Kondratiev 976b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9772be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9782be7d22fSVladimir Kondratiev reply.cmd.status); 979c331997bSVladimir Kondratiev rc = -EINVAL; 9802be7d22fSVladimir Kondratiev goto out_free; 9812be7d22fSVladimir Kondratiev } 9822be7d22fSVladimir Kondratiev 983dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 984dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 985097638a0SVladimir Kondratiev txdata->enabled = 1; 986dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 987dc90506fSMaya Erez 988230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9893a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 990097638a0SVladimir Kondratiev 9912be7d22fSVladimir Kondratiev return 0; 9922be7d22fSVladimir Kondratiev out_free: 993875e9439SMaya Erez spin_lock_bh(&txdata->lock); 994230d8442SVladimir Kondratiev txdata->dot1x_open = false; 995230d8442SVladimir Kondratiev txdata->enabled = 0; 996875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 9972be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9980916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 9990916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 10000916d9f2SMaya Erez 10012be7d22fSVladimir Kondratiev out: 10022be7d22fSVladimir Kondratiev 10032be7d22fSVladimir Kondratiev return rc; 10042be7d22fSVladimir Kondratiev } 10052be7d22fSVladimir Kondratiev 100641d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 100741d6b093SVladimir Kondratiev { 100841d6b093SVladimir Kondratiev int rc; 100941d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 101041d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 101141d6b093SVladimir Kondratiev .vring_cfg = { 101241d6b093SVladimir Kondratiev .tx_sw_ring = { 101341d6b093SVladimir Kondratiev .max_mpdu_size = 101441d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 101541d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 101641d6b093SVladimir Kondratiev }, 101741d6b093SVladimir Kondratiev .ringid = id, 101841d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 101941d6b093SVladimir Kondratiev }, 102041d6b093SVladimir Kondratiev }; 102141d6b093SVladimir Kondratiev struct { 1022b874ddecSLior David struct wmi_cmd_hdr wmi; 102341d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 102441d6b093SVladimir Kondratiev } __packed reply; 102541d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 102641d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 102741d6b093SVladimir Kondratiev 1028af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 102941d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10309b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 103141d6b093SVladimir Kondratiev 103241d6b093SVladimir Kondratiev if (vring->va) { 103341d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 103441d6b093SVladimir Kondratiev rc = -EINVAL; 103541d6b093SVladimir Kondratiev goto out; 103641d6b093SVladimir Kondratiev } 103741d6b093SVladimir Kondratiev 1038875e9439SMaya Erez wil_tx_data_init(txdata); 103941d6b093SVladimir Kondratiev vring->size = size; 104041d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 104141d6b093SVladimir Kondratiev if (rc) 104241d6b093SVladimir Kondratiev goto out; 104341d6b093SVladimir Kondratiev 104441d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 104541d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 104641d6b093SVladimir Kondratiev 104741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 104841d6b093SVladimir Kondratiev 1049230d8442SVladimir Kondratiev if (!wil->privacy) 1050230d8442SVladimir Kondratiev txdata->dot1x_open = true; 105141d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 105241d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 105341d6b093SVladimir Kondratiev if (rc) 105441d6b093SVladimir Kondratiev goto out_free; 105541d6b093SVladimir Kondratiev 105641d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 105741d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 105841d6b093SVladimir Kondratiev reply.cmd.status); 105941d6b093SVladimir Kondratiev rc = -EINVAL; 106041d6b093SVladimir Kondratiev goto out_free; 106141d6b093SVladimir Kondratiev } 106241d6b093SVladimir Kondratiev 1063dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1064dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 106541d6b093SVladimir Kondratiev txdata->enabled = 1; 1066dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 106741d6b093SVladimir Kondratiev 106841d6b093SVladimir Kondratiev return 0; 106941d6b093SVladimir Kondratiev out_free: 1070875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1071230d8442SVladimir Kondratiev txdata->enabled = 0; 1072230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1073875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 107441d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 107541d6b093SVladimir Kondratiev out: 107641d6b093SVladimir Kondratiev 107741d6b093SVladimir Kondratiev return rc; 107841d6b093SVladimir Kondratiev } 107941d6b093SVladimir Kondratiev 10802be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 10812be7d22fSVladimir Kondratiev { 10822be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 10833a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 10842be7d22fSVladimir Kondratiev 10859b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1086097638a0SVladimir Kondratiev 10872be7d22fSVladimir Kondratiev if (!vring->va) 10882be7d22fSVladimir Kondratiev return; 10892be7d22fSVladimir Kondratiev 1090af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 10919cf10d62SVladimir Kondratiev 10925933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1093230d8442SVladimir Kondratiev txdata->dot1x_open = false; 10945933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 10955933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 109634b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 109734b8886eSMaya Erez * not prevent the next NAPI run. 109834b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 109934b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 110034b8886eSMaya Erez * handle this vring 110134b8886eSMaya Erez */ 110234b8886eSMaya Erez wmb(); 1103097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 11049419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1105097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1106097638a0SVladimir Kondratiev 11072be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 11082be7d22fSVladimir Kondratiev } 11092be7d22fSVladimir Kondratiev 111041d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 11112be7d22fSVladimir Kondratiev struct sk_buff *skb) 11122be7d22fSVladimir Kondratiev { 11133df2cd36SVladimir Kondratiev int i; 11143df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 11153df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 11162be7d22fSVladimir Kondratiev 11173df2cd36SVladimir Kondratiev if (cid < 0) 11183df2cd36SVladimir Kondratiev return NULL; 11193df2cd36SVladimir Kondratiev 11203df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 11213df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1122230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1123230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1124230d8442SVladimir Kondratiev continue; 11253df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 11263df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1127b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 11288fe59627SVladimir Kondratiev 1129af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1130af3db60aSLazar Alexei eth->h_dest, i); 1131b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11322be7d22fSVladimir Kondratiev return v; 11333df2cd36SVladimir Kondratiev } else { 1134af3db60aSLazar Alexei wil_dbg_txrx(wil, 1135af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1136af3db60aSLazar Alexei i); 11373df2cd36SVladimir Kondratiev return NULL; 11383df2cd36SVladimir Kondratiev } 11393df2cd36SVladimir Kondratiev } 11403df2cd36SVladimir Kondratiev } 11412be7d22fSVladimir Kondratiev 11422be7d22fSVladimir Kondratiev return NULL; 11432be7d22fSVladimir Kondratiev } 11442be7d22fSVladimir Kondratiev 1145fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1146fb3cac57SVladimir Kondratiev struct sk_buff *skb); 114754ed90a8SVladimir Kondratiev 114854ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 114954ed90a8SVladimir Kondratiev struct sk_buff *skb) 115054ed90a8SVladimir Kondratiev { 115154ed90a8SVladimir Kondratiev struct vring *v; 115254ed90a8SVladimir Kondratiev int i; 115354ed90a8SVladimir Kondratiev u8 cid; 1154b729aaf0SMaya Erez struct vring_tx_data *txdata; 115554ed90a8SVladimir Kondratiev 115654ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 115754ed90a8SVladimir Kondratiev * for the AP we connected to. 1158230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 115954ed90a8SVladimir Kondratiev */ 116054ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 116154ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1162b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1163b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 116454ed90a8SVladimir Kondratiev continue; 116554ed90a8SVladimir Kondratiev 116654ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 116741d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116841d6b093SVladimir Kondratiev continue; 116941d6b093SVladimir Kondratiev 1170230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 117154ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1172230d8442SVladimir Kondratiev continue; 117354ed90a8SVladimir Kondratiev 117454ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 117554ed90a8SVladimir Kondratiev 117654ed90a8SVladimir Kondratiev return v; 117754ed90a8SVladimir Kondratiev } 117854ed90a8SVladimir Kondratiev 117954ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 118054ed90a8SVladimir Kondratiev 118154ed90a8SVladimir Kondratiev return NULL; 118254ed90a8SVladimir Kondratiev } 118354ed90a8SVladimir Kondratiev 118470812421SVladimir Kondratiev /* Use one of 2 strategies: 118570812421SVladimir Kondratiev * 118670812421SVladimir Kondratiev * 1. New (real broadcast): 118770812421SVladimir Kondratiev * use dedicated broadcast vring 118870812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 118970812421SVladimir Kondratiev * Find 1-st vring and return it; 119070812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 119170812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 119270812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 119370812421SVladimir Kondratiev * - for PBSS 119470812421SVladimir Kondratiev */ 119570812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1196fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1197fb3cac57SVladimir Kondratiev { 119841d6b093SVladimir Kondratiev struct vring *v; 1199b729aaf0SMaya Erez struct vring_tx_data *txdata; 120041d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1201fb3cac57SVladimir Kondratiev 120241d6b093SVladimir Kondratiev if (i < 0) 120341d6b093SVladimir Kondratiev return NULL; 1204fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1205b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1206b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1207fb3cac57SVladimir Kondratiev return NULL; 1208230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1209230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1210230d8442SVladimir Kondratiev return NULL; 1211fb3cac57SVladimir Kondratiev 1212fb3cac57SVladimir Kondratiev return v; 1213fb3cac57SVladimir Kondratiev } 1214fb3cac57SVladimir Kondratiev 121570812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 121670812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 121770812421SVladimir Kondratiev { 121870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 121970812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 122070812421SVladimir Kondratiev 122170812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 122270812421SVladimir Kondratiev } 122370812421SVladimir Kondratiev 122470812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 122570812421SVladimir Kondratiev struct sk_buff *skb) 122670812421SVladimir Kondratiev { 122770812421SVladimir Kondratiev struct vring *v, *v2; 122870812421SVladimir Kondratiev struct sk_buff *skb2; 122970812421SVladimir Kondratiev int i; 123070812421SVladimir Kondratiev u8 cid; 123170812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 123270812421SVladimir Kondratiev char *src = eth->h_source; 1233b729aaf0SMaya Erez struct vring_tx_data *txdata; 123470812421SVladimir Kondratiev 123570812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 123670812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 123770812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1238b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1239b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 124070812421SVladimir Kondratiev continue; 124170812421SVladimir Kondratiev 124270812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 124370812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 124470812421SVladimir Kondratiev continue; 1245230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1246230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 124770812421SVladimir Kondratiev continue; 124870812421SVladimir Kondratiev 124970812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 125070812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 125170812421SVladimir Kondratiev continue; 125270812421SVladimir Kondratiev 125370812421SVladimir Kondratiev goto found; 125470812421SVladimir Kondratiev } 125570812421SVladimir Kondratiev 125670812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 125770812421SVladimir Kondratiev 125870812421SVladimir Kondratiev return NULL; 125970812421SVladimir Kondratiev 126070812421SVladimir Kondratiev found: 126170812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 126270812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 126370812421SVladimir Kondratiev 126470812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 126570812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 126670812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 126770812421SVladimir Kondratiev if (!v2->va) 126870812421SVladimir Kondratiev continue; 126970812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 127070812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 127170812421SVladimir Kondratiev continue; 1272230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1273230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 127470812421SVladimir Kondratiev continue; 127570812421SVladimir Kondratiev 127670812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 127770812421SVladimir Kondratiev continue; 127870812421SVladimir Kondratiev 127970812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 128070812421SVladimir Kondratiev if (skb2) { 128170812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 128270812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 128370812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 128470812421SVladimir Kondratiev } else { 128570812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 128670812421SVladimir Kondratiev } 128770812421SVladimir Kondratiev } 128870812421SVladimir Kondratiev 128970812421SVladimir Kondratiev return v; 129070812421SVladimir Kondratiev } 129170812421SVladimir Kondratiev 129299b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 129399b55bd2SKirshenbaum Erez int vring_index) 12942be7d22fSVladimir Kondratiev { 129568ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 12962be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 12972be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 12982be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 12992be7d22fSVladimir Kondratiev d->dma.error = 0; 13002be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 13017e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 130299b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 13032be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 13042be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 13052be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 13062be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 13072be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 13082be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 13092be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 13102be7d22fSVladimir Kondratiev 13112be7d22fSVladimir Kondratiev return 0; 13122be7d22fSVladimir Kondratiev } 13132be7d22fSVladimir Kondratiev 1314c236658fSVladimir Kondratiev static inline 1315c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1316c236658fSVladimir Kondratiev { 13173d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1318c236658fSVladimir Kondratiev } 1319c236658fSVladimir Kondratiev 13203d4bde15SVladimir Kondratiev /** 13213d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13223d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13233d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13243d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13253d4bde15SVladimir Kondratiev */ 13263d4bde15SVladimir Kondratiev 13273d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13283d4bde15SVladimir Kondratiev struct sk_buff *skb, 13293d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13303d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1331504937d4SKirshenbaum Erez { 13323d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13333d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13343d4bde15SVladimir Kondratiev 13353d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13363d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13373d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13383d4bde15SVladimir Kondratiev 13393d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13403d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13413d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13423d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13433d4bde15SVladimir Kondratiev 13443d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13453d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13463d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13473d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13483d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13493d4bde15SVladimir Kondratiev } 13503d4bde15SVladimir Kondratiev 13513d4bde15SVladimir Kondratiev /** 13523d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13533d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13543d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13553d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13563d4bde15SVladimir Kondratiev * 13573d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13583d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13593d4bde15SVladimir Kondratiev */ 13603d4bde15SVladimir Kondratiev 13613d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13623d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1363504937d4SKirshenbaum Erez int protocol; 1364504937d4SKirshenbaum Erez 1365504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1366504937d4SKirshenbaum Erez return 0; 1367504937d4SKirshenbaum Erez 1368df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1369df2d08eeSVladimir Kondratiev 1370504937d4SKirshenbaum Erez switch (skb->protocol) { 1371504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1372504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1373df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1374504937d4SKirshenbaum Erez break; 1375504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1376504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1377504937d4SKirshenbaum Erez break; 1378504937d4SKirshenbaum Erez default: 1379504937d4SKirshenbaum Erez return -EINVAL; 1380504937d4SKirshenbaum Erez } 1381504937d4SKirshenbaum Erez 1382504937d4SKirshenbaum Erez switch (protocol) { 1383504937d4SKirshenbaum Erez case IPPROTO_TCP: 1384504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1385504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1386504937d4SKirshenbaum Erez d->dma.d0 |= 1387504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1388504937d4SKirshenbaum Erez break; 1389504937d4SKirshenbaum Erez case IPPROTO_UDP: 1390504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1391504937d4SKirshenbaum Erez d->dma.d0 |= 1392504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1393504937d4SKirshenbaum Erez break; 1394504937d4SKirshenbaum Erez default: 1395504937d4SKirshenbaum Erez return -EINVAL; 1396504937d4SKirshenbaum Erez } 1397504937d4SKirshenbaum Erez 1398504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1399504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1400504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1401504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1402504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1403504937d4SKirshenbaum Erez 1404504937d4SKirshenbaum Erez return 0; 1405504937d4SKirshenbaum Erez } 1406504937d4SKirshenbaum Erez 14073d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14083d4bde15SVladimir Kondratiev { 14093d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14103d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14113d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14123d4bde15SVladimir Kondratiev } 14133d4bde15SVladimir Kondratiev 14143d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14153d4bde15SVladimir Kondratiev { 14163d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14173d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14183d4bde15SVladimir Kondratiev } 14193d4bde15SVladimir Kondratiev 14203d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 14213d4bde15SVladimir Kondratiev struct sk_buff *skb) 14223d4bde15SVladimir Kondratiev { 14233d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14243d4bde15SVladimir Kondratiev 14253d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14263d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14273d4bde15SVladimir Kondratiev *_first_desc = NULL; 14283d4bde15SVladimir Kondratiev 14293d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14303d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14313d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14323d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14333d4bde15SVladimir Kondratiev 14343d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14353d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14363d4bde15SVladimir Kondratiev 14373d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14383d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14393d4bde15SVladimir Kondratiev 14403d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 14413d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 14423d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14433d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14443d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14453d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 14463d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 14473d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 14483d4bde15SVladimir Kondratiev uint i = swhead; 14493d4bde15SVladimir Kondratiev dma_addr_t pa; 14503d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14513d4bde15SVladimir Kondratiev int rem_data = mss; 14523d4bde15SVladimir Kondratiev int lenmss; 14533d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14543d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14553d4bde15SVladimir Kondratiev bool is_ipv4; 14563d4bde15SVladimir Kondratiev int tcp_hdr_len; 14573d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14583d4bde15SVladimir Kondratiev int gso_type; 1459e3d2ed94SHamad Kadmany int rc = -EINVAL; 14603d4bde15SVladimir Kondratiev 1461af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1462af3db60aSLazar Alexei vring_index); 14633d4bde15SVladimir Kondratiev 14643d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14653d4bde15SVladimir Kondratiev return -EINVAL; 14663d4bde15SVladimir Kondratiev 14673d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14683d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14693d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14703d4bde15SVladimir Kondratiev * this is the initial check only. 14713d4bde15SVladimir Kondratiev */ 14723d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14733d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14743d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14753d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14763d4bde15SVladimir Kondratiev return -ENOMEM; 14773d4bde15SVladimir Kondratiev } 14783d4bde15SVladimir Kondratiev 14793d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14803d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14813d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14823d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14833d4bde15SVladimir Kondratiev 14843d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14853d4bde15SVladimir Kondratiev switch (gso_type) { 14863d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14873d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14883d4bde15SVladimir Kondratiev * as required by the offloading doc 14893d4bde15SVladimir Kondratiev */ 14903d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14913d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14923d4bde15SVladimir Kondratiev is_ipv4 = true; 14933d4bde15SVladimir Kondratiev break; 14943d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14953d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14963d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14973d4bde15SVladimir Kondratiev is_ipv4 = false; 14983d4bde15SVladimir Kondratiev break; 14993d4bde15SVladimir Kondratiev default: 15003d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15013d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15023d4bde15SVladimir Kondratiev */ 15033d4bde15SVladimir Kondratiev return -EINVAL; 15043d4bde15SVladimir Kondratiev } 15053d4bde15SVladimir Kondratiev 15063d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15073d4bde15SVladimir Kondratiev return -EINVAL; 15083d4bde15SVladimir Kondratiev 15093d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15103d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15113d4bde15SVladimir Kondratiev */ 15123d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15133d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15143d4bde15SVladimir Kondratiev 15153d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 15163d4bde15SVladimir Kondratiev 15173d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15183d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15193d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15203d4bde15SVladimir Kondratiev goto err_exit; 15213d4bde15SVladimir Kondratiev } 15223d4bde15SVladimir Kondratiev 15233d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 15243d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15253d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15263d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15273d4bde15SVladimir Kondratiev 15283d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15293d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15303d4bde15SVladimir Kondratiev 15313d4bde15SVladimir Kondratiev descs_used++; 15323d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15333d4bde15SVladimir Kondratiev 15343d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15353d4bde15SVladimir Kondratiev if (headlen) { 15363d4bde15SVladimir Kondratiev len = headlen; 15373d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15383d4bde15SVladimir Kondratiev len); 15393d4bde15SVladimir Kondratiev } else { 15403d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15413d4bde15SVladimir Kondratiev len = frag->size; 15423d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15433d4bde15SVladimir Kondratiev } 15443d4bde15SVladimir Kondratiev 15453d4bde15SVladimir Kondratiev while (len) { 15463d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15473d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15483d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15493d4bde15SVladimir Kondratiev 15503d4bde15SVladimir Kondratiev if (descs_used == avail) { 1551e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1552e3d2ed94SHamad Kadmany rc = -ENOMEM; 1553e3d2ed94SHamad Kadmany goto mem_error; 15543d4bde15SVladimir Kondratiev } 15553d4bde15SVladimir Kondratiev 15563d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15573d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15583d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15593d4bde15SVladimir Kondratiev 15603d4bde15SVladimir Kondratiev if (!headlen) { 15613d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15623d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15633d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15643d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15653d4bde15SVladimir Kondratiev } else { 15663d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15673d4bde15SVladimir Kondratiev skb->data + 15683d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15693d4bde15SVladimir Kondratiev lenmss, 15703d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15713d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15723d4bde15SVladimir Kondratiev headlen -= lenmss; 15733d4bde15SVladimir Kondratiev } 15743d4bde15SVladimir Kondratiev 1575e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1576e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1577e3d2ed94SHamad Kadmany goto mem_error; 1578e3d2ed94SHamad Kadmany } 15793d4bde15SVladimir Kondratiev 15803d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15813d4bde15SVladimir Kondratiev 15823d4bde15SVladimir Kondratiev if (!_first_desc) { 15833d4bde15SVladimir Kondratiev _first_desc = _desc; 15843d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15853d4bde15SVladimir Kondratiev d = first_desc; 15863d4bde15SVladimir Kondratiev } else { 15873d4bde15SVladimir Kondratiev d = &desc_mem; 15883d4bde15SVladimir Kondratiev } 15893d4bde15SVladimir Kondratiev 15903d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 15913d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15923d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15933d4bde15SVladimir Kondratiev skb_net_hdr_len); 15943d4bde15SVladimir Kondratiev 15953d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15963d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15973d4bde15SVladimir Kondratiev 15983d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15993d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16003d4bde15SVladimir Kondratiev len -= lenmss; 16013d4bde15SVladimir Kondratiev rem_data -= lenmss; 16023d4bde15SVladimir Kondratiev 16033d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16043d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16053d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16063d4bde15SVladimir Kondratiev 16073d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16083d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16093d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16103d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16113d4bde15SVladimir Kondratiev * release 16123d4bde15SVladimir Kondratiev */ 16133d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16143d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16153d4bde15SVladimir Kondratiev sg_desc_cnt + 16163d4bde15SVladimir Kondratiev 1); 16173d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16183d4bde15SVladimir Kondratiev } else { 16193d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16203d4bde15SVladimir Kondratiev sg_desc_cnt); 16213d4bde15SVladimir Kondratiev } 16223d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16233d4bde15SVladimir Kondratiev 16243d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16253d4bde15SVladimir Kondratiev 16263d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16273d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16283d4bde15SVladimir Kondratiev * it twice 16293d4bde15SVladimir Kondratiev */ 16303d4bde15SVladimir Kondratiev if (first_desc != d) 16313d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16323d4bde15SVladimir Kondratiev 16333d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16343d4bde15SVladimir Kondratiev * of this TS processing 16353d4bde15SVladimir Kondratiev */ 16363d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16373d4bde15SVladimir Kondratiev *_desc = *d; 16383d4bde15SVladimir Kondratiev 16393d4bde15SVladimir Kondratiev rem_data = mss; 16403d4bde15SVladimir Kondratiev _first_desc = NULL; 16413d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16423d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16433d4bde15SVladimir Kondratiev *_desc = *d; 16443d4bde15SVladimir Kondratiev } 16453d4bde15SVladimir Kondratiev } 16463d4bde15SVladimir Kondratiev 16473d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16483d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16493d4bde15SVladimir Kondratiev */ 16503d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16513d4bde15SVladimir Kondratiev d = first_desc; 16523d4bde15SVladimir Kondratiev 16533d4bde15SVladimir Kondratiev /* Last data descriptor */ 16543d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16553d4bde15SVladimir Kondratiev *_desc = *d; 16563d4bde15SVladimir Kondratiev 16573d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16583d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16593d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16603d4bde15SVladimir Kondratiev 16613d4bde15SVladimir Kondratiev /* hold reference to skb 16623d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16633d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16643d4bde15SVladimir Kondratiev */ 16653d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16663d4bde15SVladimir Kondratiev 16673d4bde15SVladimir Kondratiev /* performance monitoring */ 16683d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 166938d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 16703d4bde15SVladimir Kondratiev used, used + descs_used)) { 16713d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16723d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16733d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16743d4bde15SVladimir Kondratiev } 16753d4bde15SVladimir Kondratiev 1676eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1677eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1678eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1679eb26cff1SMaya Erez * skb before it was completed. 1680eb26cff1SMaya Erez */ 1681eb26cff1SMaya Erez wmb(); 1682eb26cff1SMaya Erez 16833d4bde15SVladimir Kondratiev /* advance swhead */ 16843d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1685e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16863d4bde15SVladimir Kondratiev 16873d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16883d4bde15SVladimir Kondratiev * committing them to HW 16893d4bde15SVladimir Kondratiev */ 16903d4bde15SVladimir Kondratiev wmb(); 16913d4bde15SVladimir Kondratiev 1692b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16933d4bde15SVladimir Kondratiev return 0; 16943d4bde15SVladimir Kondratiev 1695e3d2ed94SHamad Kadmany mem_error: 16963d4bde15SVladimir Kondratiev while (descs_used > 0) { 16973d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16983d4bde15SVladimir Kondratiev 1699a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 17003d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 17013d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 17023d4bde15SVladimir Kondratiev *d = *_desc; 17033d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17043d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17053d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 17063d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17073d4bde15SVladimir Kondratiev descs_used--; 17083d4bde15SVladimir Kondratiev } 17093d4bde15SVladimir Kondratiev err_exit: 1710e3d2ed94SHamad Kadmany return rc; 17113d4bde15SVladimir Kondratiev } 17123d4bde15SVladimir Kondratiev 17135933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17142be7d22fSVladimir Kondratiev struct sk_buff *skb) 17152be7d22fSVladimir Kondratiev { 17162be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 171768ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 171868ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17192be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 17202be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 17212be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1722504937d4SKirshenbaum Erez uint f = 0; 17232be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17247c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17252be7d22fSVladimir Kondratiev uint i = swhead; 17262be7d22fSVladimir Kondratiev dma_addr_t pa; 17270436fd9aSVladimir Shulman int used; 172841d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 172941d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17302be7d22fSVladimir Kondratiev 1731af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring: %d bytes to vring %d\n", skb->len, 1732af3db60aSLazar Alexei vring_index); 17332be7d22fSVladimir Kondratiev 17345933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17355933a06dSVladimir Kondratiev return -EINVAL; 17365933a06dSVladimir Kondratiev 173733c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 173870801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17395b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17405b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 17412be7d22fSVladimir Kondratiev return -ENOMEM; 17422be7d22fSVladimir Kondratiev } 17438fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17442be7d22fSVladimir Kondratiev 17458fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17462be7d22fSVladimir Kondratiev 17475b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 17485b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17497743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17502be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17512be7d22fSVladimir Kondratiev 17522be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17532be7d22fSVladimir Kondratiev return -EINVAL; 17542232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 17552be7d22fSVladimir Kondratiev /* 1-st segment */ 175641d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 175741d6b093SVladimir Kondratiev if (unlikely(mcast)) { 175841d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1759230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 176041d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 176141d6b093SVladimir Kondratiev } 1762504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17633d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17645b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1765504937d4SKirshenbaum Erez vring_index); 1766504937d4SKirshenbaum Erez goto dma_error; 1767504937d4SKirshenbaum Erez } 1768504937d4SKirshenbaum Erez 1769c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 17703d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 177168ada71eSVladimir Kondratiev 17722be7d22fSVladimir Kondratiev /* middle segments */ 1773504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17742be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17752be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17762be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17778fe59627SVladimir Kondratiev 1778e59d16c0SVladimir Kondratiev *_d = *d; 17795b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17805b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17815b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17822be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 17838fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17842be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17852be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1786e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1787e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1788e3d2ed94SHamad Kadmany vring_index); 17892be7d22fSVladimir Kondratiev goto dma_error; 1790e3d2ed94SHamad Kadmany } 17912232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 179299b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1793c236658fSVladimir Kondratiev /* no need to check return code - 1794c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1795c236658fSVladimir Kondratiev * it will succeed here too 1796c236658fSVladimir Kondratiev */ 17973d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17982be7d22fSVladimir Kondratiev } 17992be7d22fSVladimir Kondratiev /* for the last seg only */ 18002be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1801668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18022be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 180368ada71eSVladimir Kondratiev *_d = *d; 18045b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 18055b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18065b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18072be7d22fSVladimir Kondratiev 18086cdadd4dSVladimir Kondratiev /* hold reference to skb 18096cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18106cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18116cdadd4dSVladimir Kondratiev */ 18126cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 18136cdadd4dSVladimir Kondratiev 18140436fd9aSVladimir Shulman /* performance monitoring */ 18150436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 181638d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 18170436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18187c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18190436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18200436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 18210436fd9aSVladimir Shulman } 18227c0acf86SVladimir Kondratiev 1823eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1824eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1825eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1826eb26cff1SMaya Erez * skb before it was completed. 1827eb26cff1SMaya Erez */ 1828eb26cff1SMaya Erez wmb(); 1829eb26cff1SMaya Erez 18302be7d22fSVladimir Kondratiev /* advance swhead */ 18312be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 18325b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 18335b29c573SVladimir Kondratiev vring->swhead); 183498658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 18353d4bde15SVladimir Kondratiev 18363d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18373d4bde15SVladimir Kondratiev * committing them to HW 18383d4bde15SVladimir Kondratiev */ 18393d4bde15SVladimir Kondratiev wmb(); 18403d4bde15SVladimir Kondratiev 1841b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 18422be7d22fSVladimir Kondratiev 18432be7d22fSVladimir Kondratiev return 0; 18442be7d22fSVladimir Kondratiev dma_error: 18452be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1846c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1847c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1848c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18497e594444SVladimir Kondratiev 18502be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1851c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 18528fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 185368ada71eSVladimir Kondratiev *d = *_d; 185468ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18552232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1856f88f113aSVladimir Kondratiev 1857f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18582be7d22fSVladimir Kondratiev } 18592be7d22fSVladimir Kondratiev 18602be7d22fSVladimir Kondratiev return -EINVAL; 18612be7d22fSVladimir Kondratiev } 18622be7d22fSVladimir Kondratiev 18635933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 18645933a06dSVladimir Kondratiev struct sk_buff *skb) 18655933a06dSVladimir Kondratiev { 18665933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 18675933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 18685933a06dSVladimir Kondratiev int rc; 18695933a06dSVladimir Kondratiev 18705933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18713d4bde15SVladimir Kondratiev 1872fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1873fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1874fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1875fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1876fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1877fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1878fe9ee51eSMaya Erez return -EINVAL; 1879fe9ee51eSMaya Erez } 1880fe9ee51eSMaya Erez 18813d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 18823d4bde15SVladimir Kondratiev (wil, vring, skb); 18833d4bde15SVladimir Kondratiev 18845933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 18853d4bde15SVladimir Kondratiev 18865933a06dSVladimir Kondratiev return rc; 18875933a06dSVladimir Kondratiev } 18885933a06dSVladimir Kondratiev 1889f9e3033fSDedy Lansky /** 1890f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 1891f9e3033fSDedy Lansky * 1892f9e3033fSDedy Lansky * This function does one of two checks: 1893f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1894f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1895f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1896f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1897f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1898f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1899f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1900f9e3033fSDedy Lansky * 1901f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1902f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1903f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1904f9e3033fSDedy Lansky */ 1905f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 1906f9e3033fSDedy Lansky struct vring *vring, 1907f9e3033fSDedy Lansky bool check_stop) 1908f9e3033fSDedy Lansky { 1909f9e3033fSDedy Lansky int i; 1910f9e3033fSDedy Lansky 1911f9e3033fSDedy Lansky if (vring) 1912f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d, check_stop=%d, stopped=%d", 1913f9e3033fSDedy Lansky (int)(vring - wil->vring_tx), check_stop, 1914f9e3033fSDedy Lansky wil->net_queue_stopped); 1915f9e3033fSDedy Lansky else 1916f9e3033fSDedy Lansky wil_dbg_txrx(wil, "check_stop=%d, stopped=%d", 1917f9e3033fSDedy Lansky check_stop, wil->net_queue_stopped); 1918f9e3033fSDedy Lansky 1919f9e3033fSDedy Lansky if (check_stop == wil->net_queue_stopped) 1920f9e3033fSDedy Lansky /* net queues already in desired state */ 1921f9e3033fSDedy Lansky return; 1922f9e3033fSDedy Lansky 1923f9e3033fSDedy Lansky if (check_stop) { 1924f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1925f9e3033fSDedy Lansky /* not enough room in the vring */ 1926f9e3033fSDedy Lansky netif_tx_stop_all_queues(wil_to_ndev(wil)); 1927f9e3033fSDedy Lansky wil->net_queue_stopped = true; 1928f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1929f9e3033fSDedy Lansky } 1930f9e3033fSDedy Lansky return; 1931f9e3033fSDedy Lansky } 1932f9e3033fSDedy Lansky 1933fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1934fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1935fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1936fe9ee51eSMaya Erez return; 1937fe9ee51eSMaya Erez 1938f9e3033fSDedy Lansky /* check wake */ 1939f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1940f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1941f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1942f9e3033fSDedy Lansky 1943f9e3033fSDedy Lansky if (!cur_vring->va || !txdata->enabled || cur_vring == vring) 1944f9e3033fSDedy Lansky continue; 1945f9e3033fSDedy Lansky 1946f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1947f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1948f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1949f9e3033fSDedy Lansky return; 1950f9e3033fSDedy Lansky } 1951f9e3033fSDedy Lansky } 1952f9e3033fSDedy Lansky 1953f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1954f9e3033fSDedy Lansky /* enough room in the vring */ 1955f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 1956f9e3033fSDedy Lansky netif_tx_wake_all_queues(wil_to_ndev(wil)); 1957f9e3033fSDedy Lansky wil->net_queue_stopped = false; 1958f9e3033fSDedy Lansky } 1959f9e3033fSDedy Lansky } 1960f9e3033fSDedy Lansky 1961f9e3033fSDedy Lansky void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring, 1962f9e3033fSDedy Lansky bool check_stop) 1963f9e3033fSDedy Lansky { 1964f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 1965f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1966f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1967f9e3033fSDedy Lansky } 1968f9e3033fSDedy Lansky 1969f9e3033fSDedy Lansky void wil_update_net_queues_bh(struct wil6210_priv *wil, struct vring *vring, 1970f9e3033fSDedy Lansky bool check_stop) 1971f9e3033fSDedy Lansky { 1972f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 1973f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1974f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1975f9e3033fSDedy Lansky } 1976f9e3033fSDedy Lansky 19772be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19782be7d22fSVladimir Kondratiev { 19792be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 19803df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 198141d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 19822be7d22fSVladimir Kondratiev struct vring *vring; 1983aa27deaaSVladimir Kondratiev static bool pr_once_fw; 19842be7d22fSVladimir Kondratiev int rc; 19852be7d22fSVladimir Kondratiev 1986af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 198733c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1988aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 19892be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1990aa27deaaSVladimir Kondratiev pr_once_fw = true; 1991aa27deaaSVladimir Kondratiev } 19922be7d22fSVladimir Kondratiev goto drop; 19932be7d22fSVladimir Kondratiev } 199433c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1995d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 19962be7d22fSVladimir Kondratiev goto drop; 19972be7d22fSVladimir Kondratiev } 199833c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 19992be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20002be7d22fSVladimir Kondratiev goto drop; 20012be7d22fSVladimir Kondratiev } 2002aa27deaaSVladimir Kondratiev pr_once_fw = false; 2003d58db4e4SVladimir Kondratiev 20042be7d22fSVladimir Kondratiev /* find vring */ 2005a895cb8bSLior David if (wil->wdev->iftype == NL80211_IFTYPE_STATION && !wil->pbss) { 2006a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 200754ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 2008a895cb8bSLior David } else if (bcast) { 2009a895cb8bSLior David if (wil->pbss) 2010a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2011a895cb8bSLior David * all stations VRINGs 2012a895cb8bSLior David */ 2013a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 2014a895cb8bSLior David else if (wil->wdev->iftype == NL80211_IFTYPE_AP) 2015a895cb8bSLior David /* AP has a dedicated bcast VRING */ 2016a895cb8bSLior David vring = wil_find_tx_bcast_1(wil, skb); 2017a895cb8bSLior David else 2018a895cb8bSLior David /* unexpected combination, fallback to duplicating 2019a895cb8bSLior David * the skb in all stations VRINGs 2020a895cb8bSLior David */ 2021a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 2022a895cb8bSLior David } else { 2023a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 2024a895cb8bSLior David vring = wil_find_tx_ucast(wil, skb); 202554ed90a8SVladimir Kondratiev } 202633c477fdSVladimir Kondratiev if (unlikely(!vring)) { 20275aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 20282be7d22fSVladimir Kondratiev goto drop; 20292be7d22fSVladimir Kondratiev } 20302be7d22fSVladimir Kondratiev /* set up vring entry */ 20312be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 2032d58db4e4SVladimir Kondratiev 20332be7d22fSVladimir Kondratiev switch (rc) { 20342be7d22fSVladimir Kondratiev case 0: 2035f9e3033fSDedy Lansky /* shall we stop net queues? */ 2036f9e3033fSDedy Lansky wil_update_net_queues_bh(wil, vring, true); 2037795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20382be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20392be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20402be7d22fSVladimir Kondratiev case -ENOMEM: 20412be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20422be7d22fSVladimir Kondratiev default: 2043afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20442be7d22fSVladimir Kondratiev } 20452be7d22fSVladimir Kondratiev drop: 20462be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20472be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20482be7d22fSVladimir Kondratiev 20492be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20502be7d22fSVladimir Kondratiev } 20512be7d22fSVladimir Kondratiev 2052713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 2053713c8a29SVladimir Kondratiev { 2054713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 2055713c8a29SVladimir Kondratiev 2056713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 2057713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 2058713c8a29SVladimir Kondratiev } 2059713c8a29SVladimir Kondratiev 2060713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 2061713c8a29SVladimir Kondratiev { 2062713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 2063713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 2064713c8a29SVladimir Kondratiev else 2065713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 2066713c8a29SVladimir Kondratiev } 2067713c8a29SVladimir Kondratiev 20682be7d22fSVladimir Kondratiev /** 20692be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 20702be7d22fSVladimir Kondratiev * 2071e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2072e0287c4aSVladimir Kondratiev * 20732be7d22fSVladimir Kondratiev * Safe to call from IRQ 20742be7d22fSVladimir Kondratiev */ 2075e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 20762be7d22fSVladimir Kondratiev { 2077795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 20782be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 20792be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 2080097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 2081e0287c4aSVladimir Kondratiev int done = 0; 2082c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 208341d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2084c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20850436fd9aSVladimir Shulman int used_before_complete; 20860436fd9aSVladimir Shulman int used_new; 20872be7d22fSVladimir Kondratiev 208833c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 20892be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2090e0287c4aSVladimir Kondratiev return 0; 20912be7d22fSVladimir Kondratiev } 20922be7d22fSVladimir Kondratiev 209333c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2094097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2095097638a0SVladimir Kondratiev return 0; 2096097638a0SVladimir Kondratiev } 2097097638a0SVladimir Kondratiev 2098af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 20992be7d22fSVladimir Kondratiev 21000436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 21010436fd9aSVladimir Shulman 210241d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 210341d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 210441d6b093SVladimir Kondratiev 21052be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 2106c236658fSVladimir Kondratiev int new_swtail; 2107c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2108c236658fSVladimir Kondratiev /** 2109c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21103d4bde15SVladimir Kondratiev * last fragment. look for it. 21113d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2112c236658fSVladimir Kondratiev */ 2113c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2114c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2115c236658fSVladimir Kondratiev 2116c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 211733c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2118c236658fSVladimir Kondratiev break; 2119c236658fSVladimir Kondratiev 2120c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2121c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21224de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21237e594444SVladimir Kondratiev u16 dmalen; 212476dfa4b7SVladimir Kondratiev struct sk_buff *skb; 212576dfa4b7SVladimir Kondratiev 212676dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 212776dfa4b7SVladimir Kondratiev skb = ctx->skb; 2128c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 21294de41befSVladimir Kondratiev 213068ada71eSVladimir Kondratiev *d = *_d; 21314de41befSVladimir Kondratiev 21327e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 213398658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 213498658095SVladimir Kondratiev d->dma.error); 21357743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21365b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21375b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21385b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21395b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21402be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21412be7d22fSVladimir Kondratiev 21422232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2143f88f113aSVladimir Kondratiev 21442be7d22fSVladimir Kondratiev if (skb) { 214533c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2146795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2147795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 214841d6b093SVladimir Kondratiev if (stats) { 214941d6b093SVladimir Kondratiev stats->tx_packets++; 2150c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 215141d6b093SVladimir Kondratiev } 2152795ce734SVladimir Kondratiev } else { 2153795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 215441d6b093SVladimir Kondratiev if (stats) 2155c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2156795ce734SVladimir Kondratiev } 2157713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21582be7d22fSVladimir Kondratiev } 2159f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2160eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2161eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2162eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2163eb26cff1SMaya Erez * is completed. 2164eb26cff1SMaya Erez */ 2165eb26cff1SMaya Erez wmb(); 2166c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 216703269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 216803269c65SVladimir Kondratiev * so hardware will not try to process this desc., 216903269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 217003269c65SVladimir Kondratiev */ 21712be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2172e0287c4aSVladimir Kondratiev done++; 21732be7d22fSVladimir Kondratiev } 2174c236658fSVladimir Kondratiev } 217567c3e1b4SVladimir Kondratiev 21760436fd9aSVladimir Shulman /* performance monitoring */ 21770436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 217838d16ab2SGidon Studinski if (wil_val_in_range(wil->vring_idle_trsh, 21790436fd9aSVladimir Shulman used_new, used_before_complete)) { 21800436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21810436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 21827c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 21837c0acf86SVladimir Kondratiev } 218467c3e1b4SVladimir Kondratiev 2185f9e3033fSDedy Lansky /* shall we wake net queues? */ 2186f9e3033fSDedy Lansky if (done) 2187f9e3033fSDedy Lansky wil_update_net_queues(wil, vring, false); 2188e0287c4aSVladimir Kondratiev 2189e0287c4aSVladimir Kondratiev return done; 21902be7d22fSVladimir Kondratiev } 2191