12be7d22fSVladimir Kondratiev /* 2b729aaf0SMaya Erez * Copyright (c) 2012-2016 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; 322be7d22fSVladimir Kondratiev module_param(rtap_include_phy_info, bool, S_IRUGO); 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; 37c406ea7cSVladimir Kondratiev module_param(rx_align_2, bool, S_IRUGO); 38c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 39c406ea7cSVladimir Kondratiev 40c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 41c406ea7cSVladimir Kondratiev { 42c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 43c406ea7cSVladimir Kondratiev } 44c406ea7cSVladimir Kondratiev 452be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 462be7d22fSVladimir Kondratiev { 472be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 482be7d22fSVladimir Kondratiev } 492be7d22fSVladimir Kondratiev 502be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 512be7d22fSVladimir Kondratiev { 522be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 532be7d22fSVladimir Kondratiev } 542be7d22fSVladimir Kondratiev 552be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 562be7d22fSVladimir Kondratiev { 572be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 582be7d22fSVladimir Kondratiev } 592be7d22fSVladimir Kondratiev 602be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 612be7d22fSVladimir Kondratiev { 622be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 632be7d22fSVladimir Kondratiev } 648fe59627SVladimir Kondratiev 650436fd9aSVladimir Shulman /* Used space in Tx Vring */ 660436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 672be7d22fSVladimir Kondratiev { 682be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 692be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 700436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 712be7d22fSVladimir Kondratiev } 722be7d22fSVladimir Kondratiev 730436fd9aSVladimir Shulman /* Available space in Tx Vring */ 740436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 750436fd9aSVladimir Shulman { 760436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 770436fd9aSVladimir Shulman } 780436fd9aSVladimir Shulman 790436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 805bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 815bb6423eSVladimir Kondratiev { 825bb6423eSVladimir Kondratiev return vring->size/8; 835bb6423eSVladimir Kondratiev } 845bb6423eSVladimir Kondratiev 850436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 865bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 875bb6423eSVladimir Kondratiev { 885bb6423eSVladimir Kondratiev return vring->size/4; 895bb6423eSVladimir Kondratiev } 905bb6423eSVladimir Kondratiev 91f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 92f9e3033fSDedy Lansky static inline int wil_vring_avail_low(struct vring *vring) 93f9e3033fSDedy Lansky { 94f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring); 95f9e3033fSDedy Lansky } 96f9e3033fSDedy Lansky 97f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 98f9e3033fSDedy Lansky static inline int wil_vring_avail_high(struct vring *vring) 99f9e3033fSDedy Lansky { 100f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring); 101f9e3033fSDedy Lansky } 102f9e3033fSDedy Lansky 1030436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 1040436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 1050436fd9aSVladimir Shulman { 1060436fd9aSVladimir Shulman return val >= min && val < max; 1070436fd9aSVladimir Shulman } 1080436fd9aSVladimir Shulman 1092be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 1102be7d22fSVladimir Kondratiev { 1112be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1122be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1132be7d22fSVladimir Kondratiev uint i; 1142be7d22fSVladimir Kondratiev 1159cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 1169cf10d62SVladimir Kondratiev 1172be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1182be7d22fSVladimir Kondratiev 1192be7d22fSVladimir Kondratiev vring->swhead = 0; 1202be7d22fSVladimir Kondratiev vring->swtail = 0; 121f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1222be7d22fSVladimir Kondratiev if (!vring->ctx) { 1232be7d22fSVladimir Kondratiev vring->va = NULL; 1242be7d22fSVladimir Kondratiev return -ENOMEM; 1252be7d22fSVladimir Kondratiev } 1260436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 1272be7d22fSVladimir Kondratiev * This is granted by the dma_alloc_coherent 1282be7d22fSVladimir Kondratiev */ 1292be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1302be7d22fSVladimir Kondratiev if (!vring->va) { 1312be7d22fSVladimir Kondratiev kfree(vring->ctx); 1322be7d22fSVladimir Kondratiev vring->ctx = NULL; 1332be7d22fSVladimir Kondratiev return -ENOMEM; 1342be7d22fSVladimir Kondratiev } 1352be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1362be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1372be7d22fSVladimir Kondratiev * we can use any 1382be7d22fSVladimir Kondratiev */ 1392be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 1408fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 1418fe59627SVladimir Kondratiev 14268ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1432be7d22fSVladimir Kondratiev } 1442be7d22fSVladimir Kondratiev 14539c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 14639c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1472be7d22fSVladimir Kondratiev 1482be7d22fSVladimir Kondratiev return 0; 1492be7d22fSVladimir Kondratiev } 1502be7d22fSVladimir Kondratiev 1512232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1522232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1532232abd5SVladimir Kondratiev { 1542232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1552232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1568fe59627SVladimir Kondratiev 1572232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1582232abd5SVladimir Kondratiev case wil_mapped_as_single: 1592232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1602232abd5SVladimir Kondratiev break; 1612232abd5SVladimir Kondratiev case wil_mapped_as_page: 1622232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1632232abd5SVladimir Kondratiev break; 1642232abd5SVladimir Kondratiev default: 1652232abd5SVladimir Kondratiev break; 1662232abd5SVladimir Kondratiev } 1672232abd5SVladimir Kondratiev } 1682232abd5SVladimir Kondratiev 1692be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 1702be7d22fSVladimir Kondratiev int tx) 1712be7d22fSVladimir Kondratiev { 1722be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1732be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1742be7d22fSVladimir Kondratiev 1759b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 176ef77285fSVladimir Kondratiev if (tx) { 177ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 178ef77285fSVladimir Kondratiev 179ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 180ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 181ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 182ef77285fSVladimir Kondratiev } else { 183ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 184ef77285fSVladimir Kondratiev vring->size, vring->va, 185ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 186ef77285fSVladimir Kondratiev } 187ef77285fSVladimir Kondratiev 1882be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 18968ada71eSVladimir Kondratiev dma_addr_t pa; 1907e594444SVladimir Kondratiev u16 dmalen; 191f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 19268ada71eSVladimir Kondratiev 1932be7d22fSVladimir Kondratiev if (tx) { 19468ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 19568ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 1962be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 19768ada71eSVladimir Kondratiev 198f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 19934b8886eSMaya Erez if (!ctx) { 20034b8886eSMaya Erez wil_dbg_txrx(wil, 20134b8886eSMaya Erez "ctx(%d) was already completed\n", 20234b8886eSMaya Erez vring->swtail); 20334b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 20434b8886eSMaya Erez continue; 20534b8886eSMaya Erez } 20668ada71eSVladimir Kondratiev *d = *_d; 2072232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 208f88f113aSVladimir Kondratiev if (ctx->skb) 209f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 2102be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2112be7d22fSVladimir Kondratiev } else { /* rx */ 21268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 21368ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2144d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 21568ada71eSVladimir Kondratiev 216f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 21768ada71eSVladimir Kondratiev *d = *_d; 21868ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2197e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2207e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 221f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2222be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2232be7d22fSVladimir Kondratiev } 2242be7d22fSVladimir Kondratiev } 2252be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2262be7d22fSVladimir Kondratiev kfree(vring->ctx); 2272be7d22fSVladimir Kondratiev vring->pa = 0; 2282be7d22fSVladimir Kondratiev vring->va = NULL; 2292be7d22fSVladimir Kondratiev vring->ctx = NULL; 2302be7d22fSVladimir Kondratiev } 2312be7d22fSVladimir Kondratiev 2322be7d22fSVladimir Kondratiev /** 2332be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2342be7d22fSVladimir Kondratiev * 2352be7d22fSVladimir Kondratiev * Safe to call from IRQ 2362be7d22fSVladimir Kondratiev */ 2372be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 2382be7d22fSVladimir Kondratiev u32 i, int headroom) 2392be7d22fSVladimir Kondratiev { 2402be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 241c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen(); 24268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 2438fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 2442be7d22fSVladimir Kondratiev dma_addr_t pa; 2452be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2468fe59627SVladimir Kondratiev 2472be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2482be7d22fSVladimir Kondratiev return -ENOMEM; 2492be7d22fSVladimir Kondratiev 2502be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2512be7d22fSVladimir Kondratiev skb_put(skb, sz); 2522be7d22fSVladimir Kondratiev 2532be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2542be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2552be7d22fSVladimir Kondratiev kfree_skb(skb); 2562be7d22fSVladimir Kondratiev return -ENOMEM; 2572be7d22fSVladimir Kondratiev } 2582be7d22fSVladimir Kondratiev 25948c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 26068ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2612be7d22fSVladimir Kondratiev /* ip_length don't care */ 2622be7d22fSVladimir Kondratiev /* b11 don't care */ 2632be7d22fSVladimir Kondratiev /* error don't care */ 2642be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2657e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 26668ada71eSVladimir Kondratiev *_d = *d; 267f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2682be7d22fSVladimir Kondratiev 2692be7d22fSVladimir Kondratiev return 0; 2702be7d22fSVladimir Kondratiev } 2712be7d22fSVladimir Kondratiev 2722be7d22fSVladimir Kondratiev /** 2732be7d22fSVladimir Kondratiev * Adds radiotap header 2742be7d22fSVladimir Kondratiev * 2752be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 2762be7d22fSVladimir Kondratiev * 2772be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 2782be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 2792be7d22fSVladimir Kondratiev * - Phy info 2802be7d22fSVladimir Kondratiev */ 2812be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 28233e61169SVladimir Kondratiev struct sk_buff *skb) 2832be7d22fSVladimir Kondratiev { 2842be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 2852be7d22fSVladimir Kondratiev struct wil6210_rtap { 2862be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 2872be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 2882be7d22fSVladimir Kondratiev /* flags */ 2892be7d22fSVladimir Kondratiev u8 flags; 2902be7d22fSVladimir Kondratiev /* channel */ 2912be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 2922be7d22fSVladimir Kondratiev __le16 chnl_flags; 2932be7d22fSVladimir Kondratiev /* MCS */ 2942be7d22fSVladimir Kondratiev u8 mcs_present; 2952be7d22fSVladimir Kondratiev u8 mcs_flags; 2962be7d22fSVladimir Kondratiev u8 mcs_index; 2972be7d22fSVladimir Kondratiev } __packed; 2982be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 2992be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3002be7d22fSVladimir Kondratiev /* vendor */ 3012be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3022be7d22fSVladimir Kondratiev u8 vendor_ns; 3032be7d22fSVladimir Kondratiev __le16 vendor_skip; 3042be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3052be7d22fSVladimir Kondratiev } __packed; 30633e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3072be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3082be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3092be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3102be7d22fSVladimir Kondratiev static char phy_data[128]; 3112be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 3122be7d22fSVladimir Kondratiev 3132be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3142be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3152be7d22fSVladimir Kondratiev /* calculate additional length */ 3162be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3172be7d22fSVladimir Kondratiev /** 3182be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3192be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3202be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3212be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3222be7d22fSVladimir Kondratiev */ 3232be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3242be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3258fe59627SVladimir Kondratiev 3262be7d22fSVladimir Kondratiev if (len > 8) { 3272be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3282be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3298fe59627SVladimir Kondratiev 3302be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3312be7d22fSVladimir Kondratiev phy_length = len - 8; 3322be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3332be7d22fSVladimir Kondratiev } 3342be7d22fSVladimir Kondratiev } 3352be7d22fSVladimir Kondratiev } 3362be7d22fSVladimir Kondratiev rtap_len += phy_length; 3372be7d22fSVladimir Kondratiev } 3382be7d22fSVladimir Kondratiev 3392be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3402be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3412be7d22fSVladimir Kondratiev wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); 3422be7d22fSVladimir Kondratiev return; 3432be7d22fSVladimir Kondratiev } 3442be7d22fSVladimir Kondratiev 3452be7d22fSVladimir Kondratiev rtap_vendor = (void *)skb_push(skb, rtap_len); 3462be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3472be7d22fSVladimir Kondratiev 3482be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3492be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3502be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3512be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3522be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3532be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3542be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3552be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3562be7d22fSVladimir Kondratiev 3572be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3582be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3592be7d22fSVladimir Kondratiev 3602be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3612be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3622be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3632be7d22fSVladimir Kondratiev 3642be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3652be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3662be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3672be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3682be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3692be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3702be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 3712be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 3722be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 3732be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 3742be7d22fSVladimir Kondratiev phy_length); 3752be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 3762be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 3772be7d22fSVladimir Kondratiev phy_length); 3782be7d22fSVladimir Kondratiev } 3792be7d22fSVladimir Kondratiev } 3802be7d22fSVladimir Kondratiev 381a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 382a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 383a8313341SVladimir Kondratiev { 384a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 385a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 386a8313341SVladimir Kondratiev } 387a8313341SVladimir Kondratiev 3882be7d22fSVladimir Kondratiev /** 3892be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 3902be7d22fSVladimir Kondratiev * 39133e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 39233e61169SVladimir Kondratiev * 3932be7d22fSVladimir Kondratiev * Safe to call from IRQ 3942be7d22fSVladimir Kondratiev */ 3952be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 3962be7d22fSVladimir Kondratiev struct vring *vring) 3972be7d22fSVladimir Kondratiev { 3982be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 3992be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 40068ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 40168ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4022be7d22fSVladimir Kondratiev struct sk_buff *skb; 4032be7d22fSVladimir Kondratiev dma_addr_t pa; 404c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 405c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + snaplen; 4067e594444SVladimir Kondratiev u16 dmalen; 4072be7d22fSVladimir Kondratiev u8 ftype; 408c8b78b5fSVladimir Kondratiev int cid; 4093b282bc6SVladimir Kondratiev int i; 410c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 411c8b78b5fSVladimir Kondratiev 41233e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 41333e61169SVladimir Kondratiev 4143b282bc6SVladimir Kondratiev again: 41533c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4162be7d22fSVladimir Kondratiev return NULL; 4172be7d22fSVladimir Kondratiev 4183b282bc6SVladimir Kondratiev i = (int)vring->swhead; 419148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 42033c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4212be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4222be7d22fSVladimir Kondratiev return NULL; 4232be7d22fSVladimir Kondratiev } 4242be7d22fSVladimir Kondratiev 425148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 426148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 427148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 428148416a9SVladimir Kondratiev if (!skb) { 429148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4303b282bc6SVladimir Kondratiev goto again; 431148416a9SVladimir Kondratiev } 43268ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 43368ada71eSVladimir Kondratiev *d = *_d; 43468ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 43568ada71eSVladimir Kondratiev 43668ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 43768ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 43868ada71eSVladimir Kondratiev 439148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 440148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 441a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 44268ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 44368ada71eSVladimir Kondratiev 4443b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4453b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4463b282bc6SVladimir Kondratiev 44733c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 448e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4493b282bc6SVladimir Kondratiev stats->rx_large_frame++; 450110dea00SWei Yongjun kfree_skb(skb); 4513b282bc6SVladimir Kondratiev goto again; 452e270045bSVladimir Kondratiev } 4537e594444SVladimir Kondratiev skb_trim(skb, dmalen); 45433e61169SVladimir Kondratiev 4551cbbcb08SVladimir Kondratiev prefetch(skb->data); 4561cbbcb08SVladimir Kondratiev 457c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 458c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 459c0d37713SVladimir Kondratiev 460c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 461c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 462c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4632be7d22fSVladimir Kondratiev 4642be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4652be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 46633e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4672be7d22fSVladimir Kondratiev 4682be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4692be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4702be7d22fSVladimir Kondratiev return skb; 471a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4722be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4732be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4742be7d22fSVladimir Kondratiev */ 47568ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 47633c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 477a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 478a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 479a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 480a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 481a8313341SVladimir Kondratiev 482a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 483a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 484a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 4853b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 486a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 487a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 488a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 489a8313341SVladimir Kondratiev mid, cid, tid, seq); 490a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 491a8313341SVladimir Kondratiev } else { 492a8313341SVladimir Kondratiev /* print again all info. One can enable only this 493a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 494a8313341SVladimir Kondratiev */ 495a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 496a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 497a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 498a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 499a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 500a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 501a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 502a8313341SVladimir Kondratiev } 5032be7d22fSVladimir Kondratiev kfree_skb(skb); 5043b282bc6SVladimir Kondratiev goto again; 5052be7d22fSVladimir Kondratiev } 5062be7d22fSVladimir Kondratiev 507c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5082be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5093b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5102be7d22fSVladimir Kondratiev kfree_skb(skb); 5113b282bc6SVladimir Kondratiev goto again; 5122be7d22fSVladimir Kondratiev } 5132be7d22fSVladimir Kondratiev 514504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 515504937d4SKirshenbaum Erez * and in case of error drop the packet 516504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 517504937d4SKirshenbaum Erez */ 51833c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 519504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 52033c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 521504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5224a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5234a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5244a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5254a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5264a68ab10SVladimir Kondratiev */ 527504937d4SKirshenbaum Erez } 528504937d4SKirshenbaum Erez 529c406ea7cSVladimir Kondratiev if (snaplen) { 530c406ea7cSVladimir Kondratiev /* Packet layout 531c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 532c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 533c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 534c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 535c406ea7cSVladimir Kondratiev */ 536c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 537c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 538c406ea7cSVladimir Kondratiev } 539c406ea7cSVladimir Kondratiev 5402be7d22fSVladimir Kondratiev return skb; 5412be7d22fSVladimir Kondratiev } 5422be7d22fSVladimir Kondratiev 5432be7d22fSVladimir Kondratiev /** 5442be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5452be7d22fSVladimir Kondratiev * buffers posted at @swtail 5462be7d22fSVladimir Kondratiev */ 5472be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5482be7d22fSVladimir Kondratiev { 5492be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 5502be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 5512be7d22fSVladimir Kondratiev u32 next_tail; 5522be7d22fSVladimir Kondratiev int rc = 0; 5532be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5542be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5552be7d22fSVladimir Kondratiev 5562be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5572be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5582be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5592be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 56033c477fdSVladimir Kondratiev if (unlikely(rc)) { 5612be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5622be7d22fSVladimir Kondratiev rc, v->swtail); 5632be7d22fSVladimir Kondratiev break; 5642be7d22fSVladimir Kondratiev } 5652be7d22fSVladimir Kondratiev } 566ab6d7cc3SMaya Erez 567ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 568ab6d7cc3SMaya Erez * committing them to HW 569ab6d7cc3SMaya Erez */ 570ab6d7cc3SMaya Erez wmb(); 571ab6d7cc3SMaya Erez 572b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5732be7d22fSVladimir Kondratiev 5742be7d22fSVladimir Kondratiev return rc; 5752be7d22fSVladimir Kondratiev } 5762be7d22fSVladimir Kondratiev 57758527421SVladimir Kondratiev /** 57858527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 57958527421SVladimir Kondratiev * @cs: One area of memory 58058527421SVladimir Kondratiev * @ct: Another area of memory 58158527421SVladimir Kondratiev * @count: The size of the area. 58258527421SVladimir Kondratiev * 58358527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 58458527421SVladimir Kondratiev * with minimal modifications 58558527421SVladimir Kondratiev */ 58658527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 58758527421SVladimir Kondratiev { 58858527421SVladimir Kondratiev const unsigned char *su1, *su2; 58958527421SVladimir Kondratiev int res = 0; 59058527421SVladimir Kondratiev 59158527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 59258527421SVladimir Kondratiev --su1, --su2, count--) { 59358527421SVladimir Kondratiev res = *su1 - *su2; 59458527421SVladimir Kondratiev if (res) 59558527421SVladimir Kondratiev break; 59658527421SVladimir Kondratiev } 59758527421SVladimir Kondratiev return res; 59858527421SVladimir Kondratiev } 59958527421SVladimir Kondratiev 60058527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 60158527421SVladimir Kondratiev { 60258527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 60358527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 60458527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 60558527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 60658527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 60758527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 60858527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 60958527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 61058527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 61158527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 61258527421SVladimir Kondratiev 61358527421SVladimir Kondratiev if (!cc->key_set) { 61458527421SVladimir Kondratiev wil_err_ratelimited(wil, 61558527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 61658527421SVladimir Kondratiev cid, tid, mc, key_id); 61758527421SVladimir Kondratiev return -EINVAL; 61858527421SVladimir Kondratiev } 61958527421SVladimir Kondratiev 62058527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 62158527421SVladimir Kondratiev wil_err_ratelimited(wil, 62258527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 62358527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 62458527421SVladimir Kondratiev return -EINVAL; 62558527421SVladimir Kondratiev } 62658527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 62758527421SVladimir Kondratiev 62858527421SVladimir Kondratiev return 0; 62958527421SVladimir Kondratiev } 63058527421SVladimir Kondratiev 6312be7d22fSVladimir Kondratiev /* 6322be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 633e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6342be7d22fSVladimir Kondratiev */ 635b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6362be7d22fSVladimir Kondratiev { 637c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 638c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 639c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 6402be7d22fSVladimir Kondratiev unsigned int len = skb->len; 641c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 64241d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 64358527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 644c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 645c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 646c42da999SVladimir Kondratiev * is not suitable, need to look at data 647c42da999SVladimir Kondratiev */ 648c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 649c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 650c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 651c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 652c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 653c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 654c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 655c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 656c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 657c42da999SVladimir Kondratiev }; 6582be7d22fSVladimir Kondratiev 6590553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 6600553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 6610553640dSVladimir Shulman * set hash to any non-zero value to activate rps 6620553640dSVladimir Shulman * mechanism, core will be chosen according 6630553640dSVladimir Shulman * to user-level rps configuration. 6640553640dSVladimir Shulman */ 6650553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 6660553640dSVladimir Shulman 667241804cbSVladimir Kondratiev skb_orphan(skb); 668241804cbSVladimir Kondratiev 66958527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 67058527421SVladimir Kondratiev rc = GRO_DROP; 67158527421SVladimir Kondratiev dev_kfree_skb(skb); 67258527421SVladimir Kondratiev stats->rx_replay++; 67358527421SVladimir Kondratiev goto stats; 67458527421SVladimir Kondratiev } 67558527421SVladimir Kondratiev 67602beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 677c42da999SVladimir Kondratiev if (mcast) { 678c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 679c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 680c42da999SVladimir Kondratiev */ 681c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 682c42da999SVladimir Kondratiev } else { 683c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 6842be7d22fSVladimir Kondratiev 685c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 686c42da999SVladimir Kondratiev /* The destination station is associated to 687c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 688c42da999SVladimir Kondratiev * directly to it and do not pass it to local 689c42da999SVladimir Kondratiev * net stack. 690c42da999SVladimir Kondratiev */ 691c42da999SVladimir Kondratiev xmit_skb = skb; 692c42da999SVladimir Kondratiev skb = NULL; 693c42da999SVladimir Kondratiev } 694c42da999SVladimir Kondratiev } 695c42da999SVladimir Kondratiev } 696c42da999SVladimir Kondratiev if (xmit_skb) { 697c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 698c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 699c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 700c42da999SVladimir Kondratiev */ 701c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 702c42da999SVladimir Kondratiev xmit_skb->priority += 256; 703c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 704c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 705c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 706c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 707c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 708c42da999SVladimir Kondratiev } 709c42da999SVladimir Kondratiev 710c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 711c42da999SVladimir Kondratiev 712c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 713c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 714c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 715c42da999SVladimir Kondratiev len, gro_res_str[rc]); 716c42da999SVladimir Kondratiev } 71758527421SVladimir Kondratiev stats: 718c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 719b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 720b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 721b5998e6aSVladimir Kondratiev stats->rx_dropped++; 722b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 723b5998e6aSVladimir Kondratiev } else { 7242be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 725c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7262be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 727c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 728c42da999SVladimir Kondratiev if (mcast) 729c42da999SVladimir Kondratiev ndev->stats.multicast++; 730194b482bSVladimir Kondratiev } 7312be7d22fSVladimir Kondratiev } 7322be7d22fSVladimir Kondratiev 7332be7d22fSVladimir Kondratiev /** 7342be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7352be7d22fSVladimir Kondratiev * 736e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7372be7d22fSVladimir Kondratiev */ 738e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7392be7d22fSVladimir Kondratiev { 7402be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 7412be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 7422be7d22fSVladimir Kondratiev struct sk_buff *skb; 7432be7d22fSVladimir Kondratiev 74433c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7452be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7462be7d22fSVladimir Kondratiev return; 7472be7d22fSVladimir Kondratiev } 7487743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 749e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 750e0287c4aSVladimir Kondratiev (*quota)--; 7512be7d22fSVladimir Kondratiev 7522be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 7532be7d22fSVladimir Kondratiev skb->dev = ndev; 7542be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7552be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7562be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7572be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 758b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7592be7d22fSVladimir Kondratiev } else { 760b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 7612be7d22fSVladimir Kondratiev } 7622be7d22fSVladimir Kondratiev } 7632be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 7642be7d22fSVladimir Kondratiev } 7652be7d22fSVladimir Kondratiev 766d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 7672be7d22fSVladimir Kondratiev { 7682be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7692be7d22fSVladimir Kondratiev int rc; 7702be7d22fSVladimir Kondratiev 7719cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 7729cf10d62SVladimir Kondratiev 7738bf6adb9SVladimir Kondratiev if (vring->va) { 7748bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 7758bf6adb9SVladimir Kondratiev return -EINVAL; 7768bf6adb9SVladimir Kondratiev } 7778bf6adb9SVladimir Kondratiev 778d3762b40SVladimir Kondratiev vring->size = size; 7792be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7802be7d22fSVladimir Kondratiev if (rc) 7812be7d22fSVladimir Kondratiev return rc; 7822be7d22fSVladimir Kondratiev 78347e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 7842be7d22fSVladimir Kondratiev if (rc) 7852be7d22fSVladimir Kondratiev goto err_free; 7862be7d22fSVladimir Kondratiev 7872be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 7882be7d22fSVladimir Kondratiev if (rc) 7892be7d22fSVladimir Kondratiev goto err_free; 7902be7d22fSVladimir Kondratiev 7912be7d22fSVladimir Kondratiev return 0; 7922be7d22fSVladimir Kondratiev err_free: 7932be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7942be7d22fSVladimir Kondratiev 7952be7d22fSVladimir Kondratiev return rc; 7962be7d22fSVladimir Kondratiev } 7972be7d22fSVladimir Kondratiev 7982be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 7992be7d22fSVladimir Kondratiev { 8002be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8012be7d22fSVladimir Kondratiev 8029cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 8039cf10d62SVladimir Kondratiev 8042acb4220SVladimir Kondratiev if (vring->va) 8052be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8062be7d22fSVladimir Kondratiev } 8072be7d22fSVladimir Kondratiev 808875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 809875e9439SMaya Erez { 810875e9439SMaya Erez spin_lock_bh(&txdata->lock); 811875e9439SMaya Erez txdata->dot1x_open = 0; 812875e9439SMaya Erez txdata->enabled = 0; 813875e9439SMaya Erez txdata->idle = 0; 814875e9439SMaya Erez txdata->last_idle = 0; 815875e9439SMaya Erez txdata->begin = 0; 816875e9439SMaya Erez txdata->agg_wsize = 0; 817875e9439SMaya Erez txdata->agg_timeout = 0; 818875e9439SMaya Erez txdata->agg_amsdu = 0; 819875e9439SMaya Erez txdata->addba_in_progress = false; 820875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 821875e9439SMaya Erez } 822875e9439SMaya Erez 8232be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 8242be7d22fSVladimir Kondratiev int cid, int tid) 8252be7d22fSVladimir Kondratiev { 8262be7d22fSVladimir Kondratiev int rc; 8272be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 8282be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 8292be7d22fSVladimir Kondratiev .vring_cfg = { 8302be7d22fSVladimir Kondratiev .tx_sw_ring = { 8319a06bec9SVladimir Kondratiev .max_mpdu_size = 832c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 833b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 8342be7d22fSVladimir Kondratiev }, 8352be7d22fSVladimir Kondratiev .ringid = id, 836a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 8372be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 8382be7d22fSVladimir Kondratiev .mac_ctrl = 0, 8392be7d22fSVladimir Kondratiev .to_resolution = 0, 8403277213fSVladimir Kondratiev .agg_max_wsize = 0, 8412be7d22fSVladimir Kondratiev .schd_params = { 8422be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 8432be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 8442be7d22fSVladimir Kondratiev }, 8452be7d22fSVladimir Kondratiev }, 8462be7d22fSVladimir Kondratiev }; 8472be7d22fSVladimir Kondratiev struct { 848b874ddecSLior David struct wmi_cmd_hdr wmi; 8492be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 8502be7d22fSVladimir Kondratiev } __packed reply; 8512be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 852097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8532be7d22fSVladimir Kondratiev 854e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 855e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8569b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 8579cf10d62SVladimir Kondratiev 8582be7d22fSVladimir Kondratiev if (vring->va) { 8592be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 8602be7d22fSVladimir Kondratiev rc = -EINVAL; 8612be7d22fSVladimir Kondratiev goto out; 8622be7d22fSVladimir Kondratiev } 8632be7d22fSVladimir Kondratiev 864875e9439SMaya Erez wil_tx_data_init(txdata); 8652be7d22fSVladimir Kondratiev vring->size = size; 8662be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8672be7d22fSVladimir Kondratiev if (rc) 8682be7d22fSVladimir Kondratiev goto out; 8692be7d22fSVladimir Kondratiev 87093ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 87193ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 87293ae6d49SVladimir Kondratiev 8732be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 8742be7d22fSVladimir Kondratiev 875230d8442SVladimir Kondratiev if (!wil->privacy) 876230d8442SVladimir Kondratiev txdata->dot1x_open = true; 8772be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 8782be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 8792be7d22fSVladimir Kondratiev if (rc) 8802be7d22fSVladimir Kondratiev goto out_free; 8812be7d22fSVladimir Kondratiev 882b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 8832be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 8842be7d22fSVladimir Kondratiev reply.cmd.status); 885c331997bSVladimir Kondratiev rc = -EINVAL; 8862be7d22fSVladimir Kondratiev goto out_free; 8872be7d22fSVladimir Kondratiev } 8882be7d22fSVladimir Kondratiev 889dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 890dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 891097638a0SVladimir Kondratiev txdata->enabled = 1; 892dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 893dc90506fSMaya Erez 894230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 8953a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 896097638a0SVladimir Kondratiev 8972be7d22fSVladimir Kondratiev return 0; 8982be7d22fSVladimir Kondratiev out_free: 899875e9439SMaya Erez spin_lock_bh(&txdata->lock); 900230d8442SVladimir Kondratiev txdata->dot1x_open = false; 901230d8442SVladimir Kondratiev txdata->enabled = 0; 902875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 9032be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9040916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 9050916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 9060916d9f2SMaya Erez 9072be7d22fSVladimir Kondratiev out: 9082be7d22fSVladimir Kondratiev 9092be7d22fSVladimir Kondratiev return rc; 9102be7d22fSVladimir Kondratiev } 9112be7d22fSVladimir Kondratiev 91241d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 91341d6b093SVladimir Kondratiev { 91441d6b093SVladimir Kondratiev int rc; 91541d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 91641d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 91741d6b093SVladimir Kondratiev .vring_cfg = { 91841d6b093SVladimir Kondratiev .tx_sw_ring = { 91941d6b093SVladimir Kondratiev .max_mpdu_size = 92041d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 92141d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 92241d6b093SVladimir Kondratiev }, 92341d6b093SVladimir Kondratiev .ringid = id, 92441d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 92541d6b093SVladimir Kondratiev }, 92641d6b093SVladimir Kondratiev }; 92741d6b093SVladimir Kondratiev struct { 928b874ddecSLior David struct wmi_cmd_hdr wmi; 92941d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 93041d6b093SVladimir Kondratiev } __packed reply; 93141d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 93241d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 93341d6b093SVladimir Kondratiev 93441d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 93541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9369b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 93741d6b093SVladimir Kondratiev 93841d6b093SVladimir Kondratiev if (vring->va) { 93941d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 94041d6b093SVladimir Kondratiev rc = -EINVAL; 94141d6b093SVladimir Kondratiev goto out; 94241d6b093SVladimir Kondratiev } 94341d6b093SVladimir Kondratiev 944875e9439SMaya Erez wil_tx_data_init(txdata); 94541d6b093SVladimir Kondratiev vring->size = size; 94641d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 94741d6b093SVladimir Kondratiev if (rc) 94841d6b093SVladimir Kondratiev goto out; 94941d6b093SVladimir Kondratiev 95041d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 95141d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 95241d6b093SVladimir Kondratiev 95341d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 95441d6b093SVladimir Kondratiev 955230d8442SVladimir Kondratiev if (!wil->privacy) 956230d8442SVladimir Kondratiev txdata->dot1x_open = true; 95741d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 95841d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 95941d6b093SVladimir Kondratiev if (rc) 96041d6b093SVladimir Kondratiev goto out_free; 96141d6b093SVladimir Kondratiev 96241d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 96341d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 96441d6b093SVladimir Kondratiev reply.cmd.status); 96541d6b093SVladimir Kondratiev rc = -EINVAL; 96641d6b093SVladimir Kondratiev goto out_free; 96741d6b093SVladimir Kondratiev } 96841d6b093SVladimir Kondratiev 969dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 970dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 97141d6b093SVladimir Kondratiev txdata->enabled = 1; 972dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 97341d6b093SVladimir Kondratiev 97441d6b093SVladimir Kondratiev return 0; 97541d6b093SVladimir Kondratiev out_free: 976875e9439SMaya Erez spin_lock_bh(&txdata->lock); 977230d8442SVladimir Kondratiev txdata->enabled = 0; 978230d8442SVladimir Kondratiev txdata->dot1x_open = false; 979875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 98041d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 98141d6b093SVladimir Kondratiev out: 98241d6b093SVladimir Kondratiev 98341d6b093SVladimir Kondratiev return rc; 98441d6b093SVladimir Kondratiev } 98541d6b093SVladimir Kondratiev 9862be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 9872be7d22fSVladimir Kondratiev { 9882be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 9893a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9902be7d22fSVladimir Kondratiev 9919b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 992097638a0SVladimir Kondratiev 9932be7d22fSVladimir Kondratiev if (!vring->va) 9942be7d22fSVladimir Kondratiev return; 9952be7d22fSVladimir Kondratiev 9969cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 9979cf10d62SVladimir Kondratiev 9985933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 999230d8442SVladimir Kondratiev txdata->dot1x_open = false; 10005933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 10015933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 100234b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 100334b8886eSMaya Erez * not prevent the next NAPI run. 100434b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 100534b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 100634b8886eSMaya Erez * handle this vring 100734b8886eSMaya Erez */ 100834b8886eSMaya Erez wmb(); 1009097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 10109419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1011097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1012097638a0SVladimir Kondratiev 10132be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 10142be7d22fSVladimir Kondratiev } 10152be7d22fSVladimir Kondratiev 101641d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 10172be7d22fSVladimir Kondratiev struct sk_buff *skb) 10182be7d22fSVladimir Kondratiev { 10193df2cd36SVladimir Kondratiev int i; 10203df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 10213df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 10222be7d22fSVladimir Kondratiev 10233df2cd36SVladimir Kondratiev if (cid < 0) 10243df2cd36SVladimir Kondratiev return NULL; 10253df2cd36SVladimir Kondratiev 10263df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 10273df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1028230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1029230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1030230d8442SVladimir Kondratiev continue; 10313df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 10323df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1033b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 10348fe59627SVladimir Kondratiev 10353df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 10363df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 1037b729aaf0SMaya Erez if (v->va && txdata->enabled) { 10382be7d22fSVladimir Kondratiev return v; 10393df2cd36SVladimir Kondratiev } else { 10403df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 10413df2cd36SVladimir Kondratiev return NULL; 10423df2cd36SVladimir Kondratiev } 10433df2cd36SVladimir Kondratiev } 10443df2cd36SVladimir Kondratiev } 10452be7d22fSVladimir Kondratiev 10462be7d22fSVladimir Kondratiev return NULL; 10472be7d22fSVladimir Kondratiev } 10482be7d22fSVladimir Kondratiev 1049fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1050fb3cac57SVladimir Kondratiev struct sk_buff *skb); 105154ed90a8SVladimir Kondratiev 105254ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 105354ed90a8SVladimir Kondratiev struct sk_buff *skb) 105454ed90a8SVladimir Kondratiev { 105554ed90a8SVladimir Kondratiev struct vring *v; 105654ed90a8SVladimir Kondratiev int i; 105754ed90a8SVladimir Kondratiev u8 cid; 1058b729aaf0SMaya Erez struct vring_tx_data *txdata; 105954ed90a8SVladimir Kondratiev 106054ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 106154ed90a8SVladimir Kondratiev * for the AP we connected to. 1062230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 106354ed90a8SVladimir Kondratiev */ 106454ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 106554ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1066b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1067b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 106854ed90a8SVladimir Kondratiev continue; 106954ed90a8SVladimir Kondratiev 107054ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 107141d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 107241d6b093SVladimir Kondratiev continue; 107341d6b093SVladimir Kondratiev 1074230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 107554ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1076230d8442SVladimir Kondratiev continue; 107754ed90a8SVladimir Kondratiev 107854ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 107954ed90a8SVladimir Kondratiev 108054ed90a8SVladimir Kondratiev return v; 108154ed90a8SVladimir Kondratiev } 108254ed90a8SVladimir Kondratiev 108354ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 108454ed90a8SVladimir Kondratiev 108554ed90a8SVladimir Kondratiev return NULL; 108654ed90a8SVladimir Kondratiev } 108754ed90a8SVladimir Kondratiev 108870812421SVladimir Kondratiev /* Use one of 2 strategies: 108970812421SVladimir Kondratiev * 109070812421SVladimir Kondratiev * 1. New (real broadcast): 109170812421SVladimir Kondratiev * use dedicated broadcast vring 109270812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 109370812421SVladimir Kondratiev * Find 1-st vring and return it; 109470812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 109570812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 109670812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 109770812421SVladimir Kondratiev * - for PBSS 109870812421SVladimir Kondratiev */ 109970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1100fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1101fb3cac57SVladimir Kondratiev { 110241d6b093SVladimir Kondratiev struct vring *v; 1103b729aaf0SMaya Erez struct vring_tx_data *txdata; 110441d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1105fb3cac57SVladimir Kondratiev 110641d6b093SVladimir Kondratiev if (i < 0) 110741d6b093SVladimir Kondratiev return NULL; 1108fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1109b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1110b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1111fb3cac57SVladimir Kondratiev return NULL; 1112230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1113230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1114230d8442SVladimir Kondratiev return NULL; 1115fb3cac57SVladimir Kondratiev 1116fb3cac57SVladimir Kondratiev return v; 1117fb3cac57SVladimir Kondratiev } 1118fb3cac57SVladimir Kondratiev 111970812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 112070812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 112170812421SVladimir Kondratiev { 112270812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 112370812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 112470812421SVladimir Kondratiev 112570812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 112670812421SVladimir Kondratiev } 112770812421SVladimir Kondratiev 112870812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 112970812421SVladimir Kondratiev struct sk_buff *skb) 113070812421SVladimir Kondratiev { 113170812421SVladimir Kondratiev struct vring *v, *v2; 113270812421SVladimir Kondratiev struct sk_buff *skb2; 113370812421SVladimir Kondratiev int i; 113470812421SVladimir Kondratiev u8 cid; 113570812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 113670812421SVladimir Kondratiev char *src = eth->h_source; 1137b729aaf0SMaya Erez struct vring_tx_data *txdata; 113870812421SVladimir Kondratiev 113970812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 114070812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 114170812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1142b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1143b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 114470812421SVladimir Kondratiev continue; 114570812421SVladimir Kondratiev 114670812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 114770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 114870812421SVladimir Kondratiev continue; 1149230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1150230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 115170812421SVladimir Kondratiev continue; 115270812421SVladimir Kondratiev 115370812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 115470812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 115570812421SVladimir Kondratiev continue; 115670812421SVladimir Kondratiev 115770812421SVladimir Kondratiev goto found; 115870812421SVladimir Kondratiev } 115970812421SVladimir Kondratiev 116070812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 116170812421SVladimir Kondratiev 116270812421SVladimir Kondratiev return NULL; 116370812421SVladimir Kondratiev 116470812421SVladimir Kondratiev found: 116570812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 116670812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 116770812421SVladimir Kondratiev 116870812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 116970812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 117070812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 117170812421SVladimir Kondratiev if (!v2->va) 117270812421SVladimir Kondratiev continue; 117370812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 117470812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 117570812421SVladimir Kondratiev continue; 1176230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1177230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 117870812421SVladimir Kondratiev continue; 117970812421SVladimir Kondratiev 118070812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 118170812421SVladimir Kondratiev continue; 118270812421SVladimir Kondratiev 118370812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 118470812421SVladimir Kondratiev if (skb2) { 118570812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 118670812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 118770812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 118870812421SVladimir Kondratiev } else { 118970812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 119070812421SVladimir Kondratiev } 119170812421SVladimir Kondratiev } 119270812421SVladimir Kondratiev 119370812421SVladimir Kondratiev return v; 119470812421SVladimir Kondratiev } 119570812421SVladimir Kondratiev 119670812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 119770812421SVladimir Kondratiev struct sk_buff *skb) 119870812421SVladimir Kondratiev { 119970812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 120070812421SVladimir Kondratiev 120170812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 120270812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 120370812421SVladimir Kondratiev 120470812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 120570812421SVladimir Kondratiev } 120670812421SVladimir Kondratiev 120799b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 120899b55bd2SKirshenbaum Erez int vring_index) 12092be7d22fSVladimir Kondratiev { 121068ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 12112be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 12122be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 12132be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 12142be7d22fSVladimir Kondratiev d->dma.error = 0; 12152be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 12167e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 121799b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 12182be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 12192be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 12202be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 12212be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 12222be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 12232be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 12242be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 12252be7d22fSVladimir Kondratiev 12262be7d22fSVladimir Kondratiev return 0; 12272be7d22fSVladimir Kondratiev } 12282be7d22fSVladimir Kondratiev 1229c236658fSVladimir Kondratiev static inline 1230c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1231c236658fSVladimir Kondratiev { 12323d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1233c236658fSVladimir Kondratiev } 1234c236658fSVladimir Kondratiev 12353d4bde15SVladimir Kondratiev /** 12363d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12373d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12383d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12393d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 12403d4bde15SVladimir Kondratiev */ 12413d4bde15SVladimir Kondratiev 12423d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 12433d4bde15SVladimir Kondratiev struct sk_buff *skb, 12443d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 12453d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1246504937d4SKirshenbaum Erez { 12473d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 12483d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 12493d4bde15SVladimir Kondratiev 12503d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 12513d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 12523d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 12533d4bde15SVladimir Kondratiev 12543d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 12553d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 12563d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 12573d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 12583d4bde15SVladimir Kondratiev 12593d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 12603d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 12613d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 12623d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 12633d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 12643d4bde15SVladimir Kondratiev } 12653d4bde15SVladimir Kondratiev 12663d4bde15SVladimir Kondratiev /** 12673d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 12683d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12693d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 12703d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 12713d4bde15SVladimir Kondratiev * 12723d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 12733d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 12743d4bde15SVladimir Kondratiev */ 12753d4bde15SVladimir Kondratiev 12763d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 12773d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1278504937d4SKirshenbaum Erez int protocol; 1279504937d4SKirshenbaum Erez 1280504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1281504937d4SKirshenbaum Erez return 0; 1282504937d4SKirshenbaum Erez 1283df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1284df2d08eeSVladimir Kondratiev 1285504937d4SKirshenbaum Erez switch (skb->protocol) { 1286504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1287504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1288df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1289504937d4SKirshenbaum Erez break; 1290504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1291504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1292504937d4SKirshenbaum Erez break; 1293504937d4SKirshenbaum Erez default: 1294504937d4SKirshenbaum Erez return -EINVAL; 1295504937d4SKirshenbaum Erez } 1296504937d4SKirshenbaum Erez 1297504937d4SKirshenbaum Erez switch (protocol) { 1298504937d4SKirshenbaum Erez case IPPROTO_TCP: 1299504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1300504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1301504937d4SKirshenbaum Erez d->dma.d0 |= 1302504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1303504937d4SKirshenbaum Erez break; 1304504937d4SKirshenbaum Erez case IPPROTO_UDP: 1305504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1306504937d4SKirshenbaum Erez d->dma.d0 |= 1307504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1308504937d4SKirshenbaum Erez break; 1309504937d4SKirshenbaum Erez default: 1310504937d4SKirshenbaum Erez return -EINVAL; 1311504937d4SKirshenbaum Erez } 1312504937d4SKirshenbaum Erez 1313504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1314504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1315504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1316504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1317504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1318504937d4SKirshenbaum Erez 1319504937d4SKirshenbaum Erez return 0; 1320504937d4SKirshenbaum Erez } 1321504937d4SKirshenbaum Erez 13223d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13233d4bde15SVladimir Kondratiev { 13243d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13253d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13263d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13273d4bde15SVladimir Kondratiev } 13283d4bde15SVladimir Kondratiev 13293d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13303d4bde15SVladimir Kondratiev { 13313d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13323d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13333d4bde15SVladimir Kondratiev } 13343d4bde15SVladimir Kondratiev 13353d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 13363d4bde15SVladimir Kondratiev struct sk_buff *skb) 13373d4bde15SVladimir Kondratiev { 13383d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13393d4bde15SVladimir Kondratiev 13403d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 13413d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 13423d4bde15SVladimir Kondratiev *_first_desc = NULL; 13433d4bde15SVladimir Kondratiev 13443d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 13453d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 13463d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 13473d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 13483d4bde15SVladimir Kondratiev 13493d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 13503d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 13513d4bde15SVladimir Kondratiev 13523d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 13533d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 13543d4bde15SVladimir Kondratiev 13553d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 13563d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 13573d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 13583d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 13593d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 13603d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 13613d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 13623d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 13633d4bde15SVladimir Kondratiev uint i = swhead; 13643d4bde15SVladimir Kondratiev dma_addr_t pa; 13653d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 13663d4bde15SVladimir Kondratiev int rem_data = mss; 13673d4bde15SVladimir Kondratiev int lenmss; 13683d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 13693d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 13703d4bde15SVladimir Kondratiev bool is_ipv4; 13713d4bde15SVladimir Kondratiev int tcp_hdr_len; 13723d4bde15SVladimir Kondratiev int skb_net_hdr_len; 13733d4bde15SVladimir Kondratiev int gso_type; 1374e3d2ed94SHamad Kadmany int rc = -EINVAL; 13753d4bde15SVladimir Kondratiev 13763d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 13773d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 13783d4bde15SVladimir Kondratiev 13793d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 13803d4bde15SVladimir Kondratiev return -EINVAL; 13813d4bde15SVladimir Kondratiev 13823d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 13833d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 13843d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 13853d4bde15SVladimir Kondratiev * this is the initial check only. 13863d4bde15SVladimir Kondratiev */ 13873d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 13883d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 13893d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 13903d4bde15SVladimir Kondratiev vring_index, min_desc_required); 13913d4bde15SVladimir Kondratiev return -ENOMEM; 13923d4bde15SVladimir Kondratiev } 13933d4bde15SVladimir Kondratiev 13943d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 13953d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 13963d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 13973d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 13983d4bde15SVladimir Kondratiev 13993d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14003d4bde15SVladimir Kondratiev switch (gso_type) { 14013d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14023d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14033d4bde15SVladimir Kondratiev * as required by the offloading doc 14043d4bde15SVladimir Kondratiev */ 14053d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14063d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14073d4bde15SVladimir Kondratiev is_ipv4 = true; 14083d4bde15SVladimir Kondratiev break; 14093d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14103d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14113d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14123d4bde15SVladimir Kondratiev is_ipv4 = false; 14133d4bde15SVladimir Kondratiev break; 14143d4bde15SVladimir Kondratiev default: 14153d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 14163d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14173d4bde15SVladimir Kondratiev */ 14183d4bde15SVladimir Kondratiev return -EINVAL; 14193d4bde15SVladimir Kondratiev } 14203d4bde15SVladimir Kondratiev 14213d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14223d4bde15SVladimir Kondratiev return -EINVAL; 14233d4bde15SVladimir Kondratiev 14243d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14253d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14263d4bde15SVladimir Kondratiev */ 14273d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14283d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14293d4bde15SVladimir Kondratiev 14303d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 14313d4bde15SVladimir Kondratiev 14323d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14333d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 14343d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 14353d4bde15SVladimir Kondratiev goto err_exit; 14363d4bde15SVladimir Kondratiev } 14373d4bde15SVladimir Kondratiev 14383d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 14393d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 14403d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 14413d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 14423d4bde15SVladimir Kondratiev 14433d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14443d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev descs_used++; 14473d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 14483d4bde15SVladimir Kondratiev 14493d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 14503d4bde15SVladimir Kondratiev if (headlen) { 14513d4bde15SVladimir Kondratiev len = headlen; 14523d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 14533d4bde15SVladimir Kondratiev len); 14543d4bde15SVladimir Kondratiev } else { 14553d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 14563d4bde15SVladimir Kondratiev len = frag->size; 14573d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 14583d4bde15SVladimir Kondratiev } 14593d4bde15SVladimir Kondratiev 14603d4bde15SVladimir Kondratiev while (len) { 14613d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14623d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 14633d4bde15SVladimir Kondratiev len, rem_data, descs_used); 14643d4bde15SVladimir Kondratiev 14653d4bde15SVladimir Kondratiev if (descs_used == avail) { 1466e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1467e3d2ed94SHamad Kadmany rc = -ENOMEM; 1468e3d2ed94SHamad Kadmany goto mem_error; 14693d4bde15SVladimir Kondratiev } 14703d4bde15SVladimir Kondratiev 14713d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 14723d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14733d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 14743d4bde15SVladimir Kondratiev 14753d4bde15SVladimir Kondratiev if (!headlen) { 14763d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 14773d4bde15SVladimir Kondratiev frag->size - len, lenmss, 14783d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14793d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 14803d4bde15SVladimir Kondratiev } else { 14813d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 14823d4bde15SVladimir Kondratiev skb->data + 14833d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 14843d4bde15SVladimir Kondratiev lenmss, 14853d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14863d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14873d4bde15SVladimir Kondratiev headlen -= lenmss; 14883d4bde15SVladimir Kondratiev } 14893d4bde15SVladimir Kondratiev 1490e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1491e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1492e3d2ed94SHamad Kadmany goto mem_error; 1493e3d2ed94SHamad Kadmany } 14943d4bde15SVladimir Kondratiev 14953d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14963d4bde15SVladimir Kondratiev 14973d4bde15SVladimir Kondratiev if (!_first_desc) { 14983d4bde15SVladimir Kondratiev _first_desc = _desc; 14993d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15003d4bde15SVladimir Kondratiev d = first_desc; 15013d4bde15SVladimir Kondratiev } else { 15023d4bde15SVladimir Kondratiev d = &desc_mem; 15033d4bde15SVladimir Kondratiev } 15043d4bde15SVladimir Kondratiev 15053d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 15063d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15073d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15083d4bde15SVladimir Kondratiev skb_net_hdr_len); 15093d4bde15SVladimir Kondratiev 15103d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15113d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15123d4bde15SVladimir Kondratiev 15133d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15143d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 15153d4bde15SVladimir Kondratiev len -= lenmss; 15163d4bde15SVladimir Kondratiev rem_data -= lenmss; 15173d4bde15SVladimir Kondratiev 15183d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15193d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15203d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15213d4bde15SVladimir Kondratiev 15223d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15233d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15243d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15253d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15263d4bde15SVladimir Kondratiev * release 15273d4bde15SVladimir Kondratiev */ 15283d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15293d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15303d4bde15SVladimir Kondratiev sg_desc_cnt + 15313d4bde15SVladimir Kondratiev 1); 15323d4bde15SVladimir Kondratiev hdr_compensation_need = false; 15333d4bde15SVladimir Kondratiev } else { 15343d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15353d4bde15SVladimir Kondratiev sg_desc_cnt); 15363d4bde15SVladimir Kondratiev } 15373d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 15383d4bde15SVladimir Kondratiev 15393d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 15403d4bde15SVladimir Kondratiev 15413d4bde15SVladimir Kondratiev /* first descriptor may also be the last 15423d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 15433d4bde15SVladimir Kondratiev * it twice 15443d4bde15SVladimir Kondratiev */ 15453d4bde15SVladimir Kondratiev if (first_desc != d) 15463d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 15473d4bde15SVladimir Kondratiev 15483d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 15493d4bde15SVladimir Kondratiev * of this TS processing 15503d4bde15SVladimir Kondratiev */ 15513d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 15523d4bde15SVladimir Kondratiev *_desc = *d; 15533d4bde15SVladimir Kondratiev 15543d4bde15SVladimir Kondratiev rem_data = mss; 15553d4bde15SVladimir Kondratiev _first_desc = NULL; 15563d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 15573d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 15583d4bde15SVladimir Kondratiev *_desc = *d; 15593d4bde15SVladimir Kondratiev } 15603d4bde15SVladimir Kondratiev } 15613d4bde15SVladimir Kondratiev 15623d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 15633d4bde15SVladimir Kondratiev * in this case d pointer is invalid 15643d4bde15SVladimir Kondratiev */ 15653d4bde15SVladimir Kondratiev if (_first_desc == _desc) 15663d4bde15SVladimir Kondratiev d = first_desc; 15673d4bde15SVladimir Kondratiev 15683d4bde15SVladimir Kondratiev /* Last data descriptor */ 15693d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 15703d4bde15SVladimir Kondratiev *_desc = *d; 15713d4bde15SVladimir Kondratiev 15723d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 15733d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 15743d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 15753d4bde15SVladimir Kondratiev 15763d4bde15SVladimir Kondratiev /* hold reference to skb 15773d4bde15SVladimir Kondratiev * to prevent skb release before accounting 15783d4bde15SVladimir Kondratiev * in case of immediate "tx done" 15793d4bde15SVladimir Kondratiev */ 15803d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15813d4bde15SVladimir Kondratiev 15823d4bde15SVladimir Kondratiev /* performance monitoring */ 15833d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 15843d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 15853d4bde15SVladimir Kondratiev used, used + descs_used)) { 15863d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15873d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15883d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 15893d4bde15SVladimir Kondratiev } 15903d4bde15SVladimir Kondratiev 1591eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1592eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1593eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1594eb26cff1SMaya Erez * skb before it was completed. 1595eb26cff1SMaya Erez */ 1596eb26cff1SMaya Erez wmb(); 1597eb26cff1SMaya Erez 15983d4bde15SVladimir Kondratiev /* advance swhead */ 15993d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1600e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16013d4bde15SVladimir Kondratiev 16023d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16033d4bde15SVladimir Kondratiev * committing them to HW 16043d4bde15SVladimir Kondratiev */ 16053d4bde15SVladimir Kondratiev wmb(); 16063d4bde15SVladimir Kondratiev 1607b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16083d4bde15SVladimir Kondratiev return 0; 16093d4bde15SVladimir Kondratiev 1610e3d2ed94SHamad Kadmany mem_error: 16113d4bde15SVladimir Kondratiev while (descs_used > 0) { 16123d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16133d4bde15SVladimir Kondratiev 1614a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 16153d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 16163d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 16173d4bde15SVladimir Kondratiev *d = *_desc; 16183d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16193d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16203d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 16213d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16223d4bde15SVladimir Kondratiev descs_used--; 16233d4bde15SVladimir Kondratiev } 16243d4bde15SVladimir Kondratiev err_exit: 1625e3d2ed94SHamad Kadmany return rc; 16263d4bde15SVladimir Kondratiev } 16273d4bde15SVladimir Kondratiev 16285933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16292be7d22fSVladimir Kondratiev struct sk_buff *skb) 16302be7d22fSVladimir Kondratiev { 16312be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 163268ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 163368ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 16342be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 16352be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 16362be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1637504937d4SKirshenbaum Erez uint f = 0; 16382be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16397c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16402be7d22fSVladimir Kondratiev uint i = swhead; 16412be7d22fSVladimir Kondratiev dma_addr_t pa; 16420436fd9aSVladimir Shulman int used; 164341d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 164441d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 16452be7d22fSVladimir Kondratiev 16463d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 16473d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 16482be7d22fSVladimir Kondratiev 16495933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 16505933a06dSVladimir Kondratiev return -EINVAL; 16515933a06dSVladimir Kondratiev 165233c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 165370801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 16545b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 16555b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 16562be7d22fSVladimir Kondratiev return -ENOMEM; 16572be7d22fSVladimir Kondratiev } 16588fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16592be7d22fSVladimir Kondratiev 16608fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 16612be7d22fSVladimir Kondratiev 16625b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 16635b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 16647743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 16652be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 16662be7d22fSVladimir Kondratiev 16672be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 16682be7d22fSVladimir Kondratiev return -EINVAL; 16692232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16702be7d22fSVladimir Kondratiev /* 1-st segment */ 167141d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 167241d6b093SVladimir Kondratiev if (unlikely(mcast)) { 167341d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1674230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 167541d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 167641d6b093SVladimir Kondratiev } 1677504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 16783d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 16795b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1680504937d4SKirshenbaum Erez vring_index); 1681504937d4SKirshenbaum Erez goto dma_error; 1682504937d4SKirshenbaum Erez } 1683504937d4SKirshenbaum Erez 1684c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 16853d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 168668ada71eSVladimir Kondratiev 16872be7d22fSVladimir Kondratiev /* middle segments */ 1688504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 16892be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 16902be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 16912be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 16928fe59627SVladimir Kondratiev 1693e59d16c0SVladimir Kondratiev *_d = *d; 16945b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 16955b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 16965b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 16972be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 16988fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16992be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17002be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1701e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1702e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1703e3d2ed94SHamad Kadmany vring_index); 17042be7d22fSVladimir Kondratiev goto dma_error; 1705e3d2ed94SHamad Kadmany } 17062232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 170799b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1708c236658fSVladimir Kondratiev /* no need to check return code - 1709c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1710c236658fSVladimir Kondratiev * it will succeed here too 1711c236658fSVladimir Kondratiev */ 17123d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17132be7d22fSVladimir Kondratiev } 17142be7d22fSVladimir Kondratiev /* for the last seg only */ 17152be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1716668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17172be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 171868ada71eSVladimir Kondratiev *_d = *d; 17195b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17205b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17215b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17222be7d22fSVladimir Kondratiev 17236cdadd4dSVladimir Kondratiev /* hold reference to skb 17246cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17256cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17266cdadd4dSVladimir Kondratiev */ 17276cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17286cdadd4dSVladimir Kondratiev 17290436fd9aSVladimir Shulman /* performance monitoring */ 17300436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 17310436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 17320436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 17337c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17340436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17350436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 17360436fd9aSVladimir Shulman } 17377c0acf86SVladimir Kondratiev 1738eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1739eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1740eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1741eb26cff1SMaya Erez * skb before it was completed. 1742eb26cff1SMaya Erez */ 1743eb26cff1SMaya Erez wmb(); 1744eb26cff1SMaya Erez 17452be7d22fSVladimir Kondratiev /* advance swhead */ 17462be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 17475b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 17485b29c573SVladimir Kondratiev vring->swhead); 174998658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 17503d4bde15SVladimir Kondratiev 17513d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17523d4bde15SVladimir Kondratiev * committing them to HW 17533d4bde15SVladimir Kondratiev */ 17543d4bde15SVladimir Kondratiev wmb(); 17553d4bde15SVladimir Kondratiev 1756b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17572be7d22fSVladimir Kondratiev 17582be7d22fSVladimir Kondratiev return 0; 17592be7d22fSVladimir Kondratiev dma_error: 17602be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1761c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1762c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1763c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 17647e594444SVladimir Kondratiev 17652be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1766c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 17678fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 176868ada71eSVladimir Kondratiev *d = *_d; 176968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 17702232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1771f88f113aSVladimir Kondratiev 1772f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17732be7d22fSVladimir Kondratiev } 17742be7d22fSVladimir Kondratiev 17752be7d22fSVladimir Kondratiev return -EINVAL; 17762be7d22fSVladimir Kondratiev } 17772be7d22fSVladimir Kondratiev 17785933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17795933a06dSVladimir Kondratiev struct sk_buff *skb) 17805933a06dSVladimir Kondratiev { 17815933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17825933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17835933a06dSVladimir Kondratiev int rc; 17845933a06dSVladimir Kondratiev 17855933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 17863d4bde15SVladimir Kondratiev 17873d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 17883d4bde15SVladimir Kondratiev (wil, vring, skb); 17893d4bde15SVladimir Kondratiev 17905933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 17913d4bde15SVladimir Kondratiev 17925933a06dSVladimir Kondratiev return rc; 17935933a06dSVladimir Kondratiev } 17945933a06dSVladimir Kondratiev 1795f9e3033fSDedy Lansky /** 1796f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 1797f9e3033fSDedy Lansky * 1798f9e3033fSDedy Lansky * This function does one of two checks: 1799f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1800f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1801f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1802f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1803f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1804f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1805f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1806f9e3033fSDedy Lansky * 1807f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1808f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1809f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1810f9e3033fSDedy Lansky */ 1811f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 1812f9e3033fSDedy Lansky struct vring *vring, 1813f9e3033fSDedy Lansky bool check_stop) 1814f9e3033fSDedy Lansky { 1815f9e3033fSDedy Lansky int i; 1816f9e3033fSDedy Lansky 1817f9e3033fSDedy Lansky if (vring) 1818f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d, check_stop=%d, stopped=%d", 1819f9e3033fSDedy Lansky (int)(vring - wil->vring_tx), check_stop, 1820f9e3033fSDedy Lansky wil->net_queue_stopped); 1821f9e3033fSDedy Lansky else 1822f9e3033fSDedy Lansky wil_dbg_txrx(wil, "check_stop=%d, stopped=%d", 1823f9e3033fSDedy Lansky check_stop, wil->net_queue_stopped); 1824f9e3033fSDedy Lansky 1825f9e3033fSDedy Lansky if (check_stop == wil->net_queue_stopped) 1826f9e3033fSDedy Lansky /* net queues already in desired state */ 1827f9e3033fSDedy Lansky return; 1828f9e3033fSDedy Lansky 1829f9e3033fSDedy Lansky if (check_stop) { 1830f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1831f9e3033fSDedy Lansky /* not enough room in the vring */ 1832f9e3033fSDedy Lansky netif_tx_stop_all_queues(wil_to_ndev(wil)); 1833f9e3033fSDedy Lansky wil->net_queue_stopped = true; 1834f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1835f9e3033fSDedy Lansky } 1836f9e3033fSDedy Lansky return; 1837f9e3033fSDedy Lansky } 1838f9e3033fSDedy Lansky 1839f9e3033fSDedy Lansky /* check wake */ 1840f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1841f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1842f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1843f9e3033fSDedy Lansky 1844f9e3033fSDedy Lansky if (!cur_vring->va || !txdata->enabled || cur_vring == vring) 1845f9e3033fSDedy Lansky continue; 1846f9e3033fSDedy Lansky 1847f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1848f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1849f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1850f9e3033fSDedy Lansky return; 1851f9e3033fSDedy Lansky } 1852f9e3033fSDedy Lansky } 1853f9e3033fSDedy Lansky 1854f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1855f9e3033fSDedy Lansky /* enough room in the vring */ 1856f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 1857f9e3033fSDedy Lansky netif_tx_wake_all_queues(wil_to_ndev(wil)); 1858f9e3033fSDedy Lansky wil->net_queue_stopped = false; 1859f9e3033fSDedy Lansky } 1860f9e3033fSDedy Lansky } 1861f9e3033fSDedy Lansky 1862f9e3033fSDedy Lansky void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring, 1863f9e3033fSDedy Lansky bool check_stop) 1864f9e3033fSDedy Lansky { 1865f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 1866f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1867f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1868f9e3033fSDedy Lansky } 1869f9e3033fSDedy Lansky 1870f9e3033fSDedy Lansky void wil_update_net_queues_bh(struct wil6210_priv *wil, struct vring *vring, 1871f9e3033fSDedy Lansky bool check_stop) 1872f9e3033fSDedy Lansky { 1873f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 1874f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1875f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1876f9e3033fSDedy Lansky } 1877f9e3033fSDedy Lansky 18782be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 18792be7d22fSVladimir Kondratiev { 18802be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 18813df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 188241d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 18832be7d22fSVladimir Kondratiev struct vring *vring; 1884aa27deaaSVladimir Kondratiev static bool pr_once_fw; 18852be7d22fSVladimir Kondratiev int rc; 18862be7d22fSVladimir Kondratiev 18877743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 188833c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1889aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 18902be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1891aa27deaaSVladimir Kondratiev pr_once_fw = true; 1892aa27deaaSVladimir Kondratiev } 18932be7d22fSVladimir Kondratiev goto drop; 18942be7d22fSVladimir Kondratiev } 189533c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1896d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 18972be7d22fSVladimir Kondratiev goto drop; 18982be7d22fSVladimir Kondratiev } 189933c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 19002be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 19012be7d22fSVladimir Kondratiev goto drop; 19022be7d22fSVladimir Kondratiev } 1903aa27deaaSVladimir Kondratiev pr_once_fw = false; 1904d58db4e4SVladimir Kondratiev 19052be7d22fSVladimir Kondratiev /* find vring */ 190654ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 190754ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 190854ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 190954ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 191041d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 191141d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 191254ed90a8SVladimir Kondratiev } 191333c477fdSVladimir Kondratiev if (unlikely(!vring)) { 19145aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 19152be7d22fSVladimir Kondratiev goto drop; 19162be7d22fSVladimir Kondratiev } 19172be7d22fSVladimir Kondratiev /* set up vring entry */ 19182be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1919d58db4e4SVladimir Kondratiev 19202be7d22fSVladimir Kondratiev switch (rc) { 19212be7d22fSVladimir Kondratiev case 0: 1922f9e3033fSDedy Lansky /* shall we stop net queues? */ 1923f9e3033fSDedy Lansky wil_update_net_queues_bh(wil, vring, true); 1924795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 19252be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 19262be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 19272be7d22fSVladimir Kondratiev case -ENOMEM: 19282be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 19292be7d22fSVladimir Kondratiev default: 1930afda8bb5SVladimir Kondratiev break; /* goto drop; */ 19312be7d22fSVladimir Kondratiev } 19322be7d22fSVladimir Kondratiev drop: 19332be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 19342be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 19352be7d22fSVladimir Kondratiev 19362be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 19372be7d22fSVladimir Kondratiev } 19382be7d22fSVladimir Kondratiev 1939713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1940713c8a29SVladimir Kondratiev { 1941713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1942713c8a29SVladimir Kondratiev 1943713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1944713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1945713c8a29SVladimir Kondratiev } 1946713c8a29SVladimir Kondratiev 1947713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1948713c8a29SVladimir Kondratiev { 1949713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1950713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1951713c8a29SVladimir Kondratiev else 1952713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1953713c8a29SVladimir Kondratiev } 1954713c8a29SVladimir Kondratiev 19552be7d22fSVladimir Kondratiev /** 19562be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 19572be7d22fSVladimir Kondratiev * 1958e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1959e0287c4aSVladimir Kondratiev * 19602be7d22fSVladimir Kondratiev * Safe to call from IRQ 19612be7d22fSVladimir Kondratiev */ 1962e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 19632be7d22fSVladimir Kondratiev { 1964795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 19652be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 19662be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1967097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1968e0287c4aSVladimir Kondratiev int done = 0; 1969c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 197041d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1971c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 19720436fd9aSVladimir Shulman int used_before_complete; 19730436fd9aSVladimir Shulman int used_new; 19742be7d22fSVladimir Kondratiev 197533c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 19762be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1977e0287c4aSVladimir Kondratiev return 0; 19782be7d22fSVladimir Kondratiev } 19792be7d22fSVladimir Kondratiev 198033c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1981097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1982097638a0SVladimir Kondratiev return 0; 1983097638a0SVladimir Kondratiev } 1984097638a0SVladimir Kondratiev 19857743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 19862be7d22fSVladimir Kondratiev 19870436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 19880436fd9aSVladimir Shulman 198941d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 199041d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 199141d6b093SVladimir Kondratiev 19922be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1993c236658fSVladimir Kondratiev int new_swtail; 1994c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1995c236658fSVladimir Kondratiev /** 1996c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 19973d4bde15SVladimir Kondratiev * last fragment. look for it. 19983d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1999c236658fSVladimir Kondratiev */ 2000c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2001c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2002c236658fSVladimir Kondratiev 2003c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 200433c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2005c236658fSVladimir Kondratiev break; 2006c236658fSVladimir Kondratiev 2007c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2008c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 20094de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 20107e594444SVladimir Kondratiev u16 dmalen; 201176dfa4b7SVladimir Kondratiev struct sk_buff *skb; 201276dfa4b7SVladimir Kondratiev 201376dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 201476dfa4b7SVladimir Kondratiev skb = ctx->skb; 2015c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 20164de41befSVladimir Kondratiev 201768ada71eSVladimir Kondratiev *d = *_d; 20184de41befSVladimir Kondratiev 20197e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 202098658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 202198658095SVladimir Kondratiev d->dma.error); 20227743882dSVladimir Kondratiev wil_dbg_txrx(wil, 20235b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 20245b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 20255b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 20265b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 20272be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 20282be7d22fSVladimir Kondratiev 20292232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2030f88f113aSVladimir Kondratiev 20312be7d22fSVladimir Kondratiev if (skb) { 203233c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2033795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2034795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 203541d6b093SVladimir Kondratiev if (stats) { 203641d6b093SVladimir Kondratiev stats->tx_packets++; 2037c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 203841d6b093SVladimir Kondratiev } 2039795ce734SVladimir Kondratiev } else { 2040795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 204141d6b093SVladimir Kondratiev if (stats) 2042c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2043795ce734SVladimir Kondratiev } 2044713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 20452be7d22fSVladimir Kondratiev } 2046f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2047eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2048eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2049eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2050eb26cff1SMaya Erez * is completed. 2051eb26cff1SMaya Erez */ 2052eb26cff1SMaya Erez wmb(); 2053c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 205403269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 205503269c65SVladimir Kondratiev * so hardware will not try to process this desc., 205603269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 205703269c65SVladimir Kondratiev */ 20582be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2059e0287c4aSVladimir Kondratiev done++; 20602be7d22fSVladimir Kondratiev } 2061c236658fSVladimir Kondratiev } 206267c3e1b4SVladimir Kondratiev 20630436fd9aSVladimir Shulman /* performance monitoring */ 20640436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 20650436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 20660436fd9aSVladimir Shulman used_new, used_before_complete)) { 20670436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 20680436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 20697c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 20707c0acf86SVladimir Kondratiev } 207167c3e1b4SVladimir Kondratiev 2072f9e3033fSDedy Lansky /* shall we wake net queues? */ 2073f9e3033fSDedy Lansky if (done) 2074f9e3033fSDedy Lansky wil_update_net_queues(wil, vring, false); 2075e0287c4aSVladimir Kondratiev 2076e0287c4aSVladimir Kondratiev return done; 20772be7d22fSVladimir Kondratiev } 2078