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 910436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 920436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 930436fd9aSVladimir Shulman { 940436fd9aSVladimir Shulman return val >= min && val < max; 950436fd9aSVladimir Shulman } 960436fd9aSVladimir Shulman 972be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 982be7d22fSVladimir Kondratiev { 992be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1002be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1012be7d22fSVladimir Kondratiev uint i; 1022be7d22fSVladimir Kondratiev 1039cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 1049cf10d62SVladimir Kondratiev 1052be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1062be7d22fSVladimir Kondratiev 1072be7d22fSVladimir Kondratiev vring->swhead = 0; 1082be7d22fSVladimir Kondratiev vring->swtail = 0; 109f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1102be7d22fSVladimir Kondratiev if (!vring->ctx) { 1112be7d22fSVladimir Kondratiev vring->va = NULL; 1122be7d22fSVladimir Kondratiev return -ENOMEM; 1132be7d22fSVladimir Kondratiev } 1140436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 1152be7d22fSVladimir Kondratiev * This is granted by the dma_alloc_coherent 1162be7d22fSVladimir Kondratiev */ 1172be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1182be7d22fSVladimir Kondratiev if (!vring->va) { 1192be7d22fSVladimir Kondratiev kfree(vring->ctx); 1202be7d22fSVladimir Kondratiev vring->ctx = NULL; 1212be7d22fSVladimir Kondratiev return -ENOMEM; 1222be7d22fSVladimir Kondratiev } 1232be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1242be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1252be7d22fSVladimir Kondratiev * we can use any 1262be7d22fSVladimir Kondratiev */ 1272be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 1288fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 1298fe59627SVladimir Kondratiev 13068ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1312be7d22fSVladimir Kondratiev } 1322be7d22fSVladimir Kondratiev 13339c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 13439c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1352be7d22fSVladimir Kondratiev 1362be7d22fSVladimir Kondratiev return 0; 1372be7d22fSVladimir Kondratiev } 1382be7d22fSVladimir Kondratiev 1392232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1402232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1412232abd5SVladimir Kondratiev { 1422232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1432232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1448fe59627SVladimir Kondratiev 1452232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1462232abd5SVladimir Kondratiev case wil_mapped_as_single: 1472232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1482232abd5SVladimir Kondratiev break; 1492232abd5SVladimir Kondratiev case wil_mapped_as_page: 1502232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1512232abd5SVladimir Kondratiev break; 1522232abd5SVladimir Kondratiev default: 1532232abd5SVladimir Kondratiev break; 1542232abd5SVladimir Kondratiev } 1552232abd5SVladimir Kondratiev } 1562232abd5SVladimir Kondratiev 1572be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 1582be7d22fSVladimir Kondratiev int tx) 1592be7d22fSVladimir Kondratiev { 1602be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1612be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1622be7d22fSVladimir Kondratiev 1639b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 164ef77285fSVladimir Kondratiev if (tx) { 165ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 166ef77285fSVladimir Kondratiev 167ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 168ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 169ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 170ef77285fSVladimir Kondratiev } else { 171ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 172ef77285fSVladimir Kondratiev vring->size, vring->va, 173ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 174ef77285fSVladimir Kondratiev } 175ef77285fSVladimir Kondratiev 1762be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 17768ada71eSVladimir Kondratiev dma_addr_t pa; 1787e594444SVladimir Kondratiev u16 dmalen; 179f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 18068ada71eSVladimir Kondratiev 1812be7d22fSVladimir Kondratiev if (tx) { 18268ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 18368ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 1842be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 18568ada71eSVladimir Kondratiev 186f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 18734b8886eSMaya Erez if (!ctx) { 18834b8886eSMaya Erez wil_dbg_txrx(wil, 18934b8886eSMaya Erez "ctx(%d) was already completed\n", 19034b8886eSMaya Erez vring->swtail); 19134b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 19234b8886eSMaya Erez continue; 19334b8886eSMaya Erez } 19468ada71eSVladimir Kondratiev *d = *_d; 1952232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 196f88f113aSVladimir Kondratiev if (ctx->skb) 197f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 1982be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1992be7d22fSVladimir Kondratiev } else { /* rx */ 20068ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 20168ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2024d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 20368ada71eSVladimir Kondratiev 204f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 20568ada71eSVladimir Kondratiev *d = *_d; 20668ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2077e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2087e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 209f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2102be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2112be7d22fSVladimir Kondratiev } 2122be7d22fSVladimir Kondratiev } 2132be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2142be7d22fSVladimir Kondratiev kfree(vring->ctx); 2152be7d22fSVladimir Kondratiev vring->pa = 0; 2162be7d22fSVladimir Kondratiev vring->va = NULL; 2172be7d22fSVladimir Kondratiev vring->ctx = NULL; 2182be7d22fSVladimir Kondratiev } 2192be7d22fSVladimir Kondratiev 2202be7d22fSVladimir Kondratiev /** 2212be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2222be7d22fSVladimir Kondratiev * 2232be7d22fSVladimir Kondratiev * Safe to call from IRQ 2242be7d22fSVladimir Kondratiev */ 2252be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 2262be7d22fSVladimir Kondratiev u32 i, int headroom) 2272be7d22fSVladimir Kondratiev { 2282be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 229c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen(); 23068ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 2318fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 2322be7d22fSVladimir Kondratiev dma_addr_t pa; 2332be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2348fe59627SVladimir Kondratiev 2352be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2362be7d22fSVladimir Kondratiev return -ENOMEM; 2372be7d22fSVladimir Kondratiev 2382be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2392be7d22fSVladimir Kondratiev skb_put(skb, sz); 2402be7d22fSVladimir Kondratiev 2412be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2422be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2432be7d22fSVladimir Kondratiev kfree_skb(skb); 2442be7d22fSVladimir Kondratiev return -ENOMEM; 2452be7d22fSVladimir Kondratiev } 2462be7d22fSVladimir Kondratiev 24748c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 24868ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2492be7d22fSVladimir Kondratiev /* ip_length don't care */ 2502be7d22fSVladimir Kondratiev /* b11 don't care */ 2512be7d22fSVladimir Kondratiev /* error don't care */ 2522be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2537e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 25468ada71eSVladimir Kondratiev *_d = *d; 255f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2562be7d22fSVladimir Kondratiev 2572be7d22fSVladimir Kondratiev return 0; 2582be7d22fSVladimir Kondratiev } 2592be7d22fSVladimir Kondratiev 2602be7d22fSVladimir Kondratiev /** 2612be7d22fSVladimir Kondratiev * Adds radiotap header 2622be7d22fSVladimir Kondratiev * 2632be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 2642be7d22fSVladimir Kondratiev * 2652be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 2662be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 2672be7d22fSVladimir Kondratiev * - Phy info 2682be7d22fSVladimir Kondratiev */ 2692be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 27033e61169SVladimir Kondratiev struct sk_buff *skb) 2712be7d22fSVladimir Kondratiev { 2722be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 2732be7d22fSVladimir Kondratiev struct wil6210_rtap { 2742be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 2752be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 2762be7d22fSVladimir Kondratiev /* flags */ 2772be7d22fSVladimir Kondratiev u8 flags; 2782be7d22fSVladimir Kondratiev /* channel */ 2792be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 2802be7d22fSVladimir Kondratiev __le16 chnl_flags; 2812be7d22fSVladimir Kondratiev /* MCS */ 2822be7d22fSVladimir Kondratiev u8 mcs_present; 2832be7d22fSVladimir Kondratiev u8 mcs_flags; 2842be7d22fSVladimir Kondratiev u8 mcs_index; 2852be7d22fSVladimir Kondratiev } __packed; 2862be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 2872be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 2882be7d22fSVladimir Kondratiev /* vendor */ 2892be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 2902be7d22fSVladimir Kondratiev u8 vendor_ns; 2912be7d22fSVladimir Kondratiev __le16 vendor_skip; 2922be7d22fSVladimir Kondratiev u8 vendor_data[0]; 2932be7d22fSVladimir Kondratiev } __packed; 29433e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 2952be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 2962be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 2972be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 2982be7d22fSVladimir Kondratiev static char phy_data[128]; 2992be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 3002be7d22fSVladimir Kondratiev 3012be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3022be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3032be7d22fSVladimir Kondratiev /* calculate additional length */ 3042be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3052be7d22fSVladimir Kondratiev /** 3062be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3072be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3082be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3092be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3102be7d22fSVladimir Kondratiev */ 3112be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3122be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3138fe59627SVladimir Kondratiev 3142be7d22fSVladimir Kondratiev if (len > 8) { 3152be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3162be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3178fe59627SVladimir Kondratiev 3182be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3192be7d22fSVladimir Kondratiev phy_length = len - 8; 3202be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3212be7d22fSVladimir Kondratiev } 3222be7d22fSVladimir Kondratiev } 3232be7d22fSVladimir Kondratiev } 3242be7d22fSVladimir Kondratiev rtap_len += phy_length; 3252be7d22fSVladimir Kondratiev } 3262be7d22fSVladimir Kondratiev 3272be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3282be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3292be7d22fSVladimir Kondratiev wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); 3302be7d22fSVladimir Kondratiev return; 3312be7d22fSVladimir Kondratiev } 3322be7d22fSVladimir Kondratiev 3332be7d22fSVladimir Kondratiev rtap_vendor = (void *)skb_push(skb, rtap_len); 3342be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3352be7d22fSVladimir Kondratiev 3362be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3372be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3382be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3392be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3402be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3412be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3422be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3432be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3442be7d22fSVladimir Kondratiev 3452be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3462be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3472be7d22fSVladimir Kondratiev 3482be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3492be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3502be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3512be7d22fSVladimir Kondratiev 3522be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3532be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3542be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3552be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3562be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3572be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3582be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 3592be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 3602be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 3612be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 3622be7d22fSVladimir Kondratiev phy_length); 3632be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 3642be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 3652be7d22fSVladimir Kondratiev phy_length); 3662be7d22fSVladimir Kondratiev } 3672be7d22fSVladimir Kondratiev } 3682be7d22fSVladimir Kondratiev 369a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 370a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 371a8313341SVladimir Kondratiev { 372a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 373a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 374a8313341SVladimir Kondratiev } 375a8313341SVladimir Kondratiev 3762be7d22fSVladimir Kondratiev /** 3772be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 3782be7d22fSVladimir Kondratiev * 37933e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 38033e61169SVladimir Kondratiev * 3812be7d22fSVladimir Kondratiev * Safe to call from IRQ 3822be7d22fSVladimir Kondratiev */ 3832be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 3842be7d22fSVladimir Kondratiev struct vring *vring) 3852be7d22fSVladimir Kondratiev { 3862be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 3872be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 38868ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 38968ada71eSVladimir Kondratiev struct vring_rx_desc *d; 3902be7d22fSVladimir Kondratiev struct sk_buff *skb; 3912be7d22fSVladimir Kondratiev dma_addr_t pa; 392c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 393c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + snaplen; 3947e594444SVladimir Kondratiev u16 dmalen; 3952be7d22fSVladimir Kondratiev u8 ftype; 396c8b78b5fSVladimir Kondratiev int cid; 3973b282bc6SVladimir Kondratiev int i; 398c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 399c8b78b5fSVladimir Kondratiev 40033e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 40133e61169SVladimir Kondratiev 4023b282bc6SVladimir Kondratiev again: 40333c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4042be7d22fSVladimir Kondratiev return NULL; 4052be7d22fSVladimir Kondratiev 4063b282bc6SVladimir Kondratiev i = (int)vring->swhead; 407148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 40833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4092be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4102be7d22fSVladimir Kondratiev return NULL; 4112be7d22fSVladimir Kondratiev } 4122be7d22fSVladimir Kondratiev 413148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 414148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 415148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 416148416a9SVladimir Kondratiev if (!skb) { 417148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4183b282bc6SVladimir Kondratiev goto again; 419148416a9SVladimir Kondratiev } 42068ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 42168ada71eSVladimir Kondratiev *d = *_d; 42268ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 42368ada71eSVladimir Kondratiev 42468ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 42568ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 42668ada71eSVladimir Kondratiev 427148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 428148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 429a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 43068ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 43168ada71eSVladimir Kondratiev 4323b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4333b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4343b282bc6SVladimir Kondratiev 43533c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 436e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4373b282bc6SVladimir Kondratiev stats->rx_large_frame++; 438110dea00SWei Yongjun kfree_skb(skb); 4393b282bc6SVladimir Kondratiev goto again; 440e270045bSVladimir Kondratiev } 4417e594444SVladimir Kondratiev skb_trim(skb, dmalen); 44233e61169SVladimir Kondratiev 4431cbbcb08SVladimir Kondratiev prefetch(skb->data); 4441cbbcb08SVladimir Kondratiev 445c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 446c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 447c0d37713SVladimir Kondratiev 448c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 449c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 450c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4512be7d22fSVladimir Kondratiev 4522be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4532be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 45433e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4552be7d22fSVladimir Kondratiev 4562be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4572be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4582be7d22fSVladimir Kondratiev return skb; 459a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4602be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4612be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4622be7d22fSVladimir Kondratiev */ 46368ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 46433c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 465a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 466a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 467a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 468a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 469a8313341SVladimir Kondratiev 470a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 471a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 472a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 4733b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 474a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 475a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 476a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 477a8313341SVladimir Kondratiev mid, cid, tid, seq); 478a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 479a8313341SVladimir Kondratiev } else { 480a8313341SVladimir Kondratiev /* print again all info. One can enable only this 481a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 482a8313341SVladimir Kondratiev */ 483a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 484a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 485a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 486a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 487a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 488a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 489a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 490a8313341SVladimir Kondratiev } 4912be7d22fSVladimir Kondratiev kfree_skb(skb); 4923b282bc6SVladimir Kondratiev goto again; 4932be7d22fSVladimir Kondratiev } 4942be7d22fSVladimir Kondratiev 495c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 4962be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 4973b282bc6SVladimir Kondratiev stats->rx_short_frame++; 4982be7d22fSVladimir Kondratiev kfree_skb(skb); 4993b282bc6SVladimir Kondratiev goto again; 5002be7d22fSVladimir Kondratiev } 5012be7d22fSVladimir Kondratiev 502504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 503504937d4SKirshenbaum Erez * and in case of error drop the packet 504504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 505504937d4SKirshenbaum Erez */ 50633c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 507504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 50833c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 509504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5104a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5114a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5124a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5134a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5144a68ab10SVladimir Kondratiev */ 515504937d4SKirshenbaum Erez } 516504937d4SKirshenbaum Erez 517c406ea7cSVladimir Kondratiev if (snaplen) { 518c406ea7cSVladimir Kondratiev /* Packet layout 519c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 520c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 521c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 522c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 523c406ea7cSVladimir Kondratiev */ 524c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 525c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 526c406ea7cSVladimir Kondratiev } 527c406ea7cSVladimir Kondratiev 5282be7d22fSVladimir Kondratiev return skb; 5292be7d22fSVladimir Kondratiev } 5302be7d22fSVladimir Kondratiev 5312be7d22fSVladimir Kondratiev /** 5322be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5332be7d22fSVladimir Kondratiev * buffers posted at @swtail 5342be7d22fSVladimir Kondratiev */ 5352be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5362be7d22fSVladimir Kondratiev { 5372be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 5382be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 5392be7d22fSVladimir Kondratiev u32 next_tail; 5402be7d22fSVladimir Kondratiev int rc = 0; 5412be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5422be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5432be7d22fSVladimir Kondratiev 5442be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5452be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5462be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5472be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 54833c477fdSVladimir Kondratiev if (unlikely(rc)) { 5492be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5502be7d22fSVladimir Kondratiev rc, v->swtail); 5512be7d22fSVladimir Kondratiev break; 5522be7d22fSVladimir Kondratiev } 5532be7d22fSVladimir Kondratiev } 554ab6d7cc3SMaya Erez 555ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 556ab6d7cc3SMaya Erez * committing them to HW 557ab6d7cc3SMaya Erez */ 558ab6d7cc3SMaya Erez wmb(); 559ab6d7cc3SMaya Erez 560b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5612be7d22fSVladimir Kondratiev 5622be7d22fSVladimir Kondratiev return rc; 5632be7d22fSVladimir Kondratiev } 5642be7d22fSVladimir Kondratiev 56558527421SVladimir Kondratiev /** 56658527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 56758527421SVladimir Kondratiev * @cs: One area of memory 56858527421SVladimir Kondratiev * @ct: Another area of memory 56958527421SVladimir Kondratiev * @count: The size of the area. 57058527421SVladimir Kondratiev * 57158527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 57258527421SVladimir Kondratiev * with minimal modifications 57358527421SVladimir Kondratiev */ 57458527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 57558527421SVladimir Kondratiev { 57658527421SVladimir Kondratiev const unsigned char *su1, *su2; 57758527421SVladimir Kondratiev int res = 0; 57858527421SVladimir Kondratiev 57958527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 58058527421SVladimir Kondratiev --su1, --su2, count--) { 58158527421SVladimir Kondratiev res = *su1 - *su2; 58258527421SVladimir Kondratiev if (res) 58358527421SVladimir Kondratiev break; 58458527421SVladimir Kondratiev } 58558527421SVladimir Kondratiev return res; 58658527421SVladimir Kondratiev } 58758527421SVladimir Kondratiev 58858527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 58958527421SVladimir Kondratiev { 59058527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 59158527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 59258527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 59358527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 59458527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 59558527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 59658527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 59758527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 59858527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 59958527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 60058527421SVladimir Kondratiev 60158527421SVladimir Kondratiev if (!cc->key_set) { 60258527421SVladimir Kondratiev wil_err_ratelimited(wil, 60358527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 60458527421SVladimir Kondratiev cid, tid, mc, key_id); 60558527421SVladimir Kondratiev return -EINVAL; 60658527421SVladimir Kondratiev } 60758527421SVladimir Kondratiev 60858527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 60958527421SVladimir Kondratiev wil_err_ratelimited(wil, 61058527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 61158527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 61258527421SVladimir Kondratiev return -EINVAL; 61358527421SVladimir Kondratiev } 61458527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 61558527421SVladimir Kondratiev 61658527421SVladimir Kondratiev return 0; 61758527421SVladimir Kondratiev } 61858527421SVladimir Kondratiev 6192be7d22fSVladimir Kondratiev /* 6202be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 621e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6222be7d22fSVladimir Kondratiev */ 623b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6242be7d22fSVladimir Kondratiev { 625c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 626c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 627c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 6282be7d22fSVladimir Kondratiev unsigned int len = skb->len; 629c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 63041d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 63158527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 632c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 633c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 634c42da999SVladimir Kondratiev * is not suitable, need to look at data 635c42da999SVladimir Kondratiev */ 636c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 637c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 638c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 639c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 640c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 641c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 642c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 643c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 644c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 645c42da999SVladimir Kondratiev }; 6462be7d22fSVladimir Kondratiev 6470553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 6480553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 6490553640dSVladimir Shulman * set hash to any non-zero value to activate rps 6500553640dSVladimir Shulman * mechanism, core will be chosen according 6510553640dSVladimir Shulman * to user-level rps configuration. 6520553640dSVladimir Shulman */ 6530553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 6540553640dSVladimir Shulman 655241804cbSVladimir Kondratiev skb_orphan(skb); 656241804cbSVladimir Kondratiev 65758527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 65858527421SVladimir Kondratiev rc = GRO_DROP; 65958527421SVladimir Kondratiev dev_kfree_skb(skb); 66058527421SVladimir Kondratiev stats->rx_replay++; 66158527421SVladimir Kondratiev goto stats; 66258527421SVladimir Kondratiev } 66358527421SVladimir Kondratiev 66402beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 665c42da999SVladimir Kondratiev if (mcast) { 666c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 667c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 668c42da999SVladimir Kondratiev */ 669c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 670c42da999SVladimir Kondratiev } else { 671c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 6722be7d22fSVladimir Kondratiev 673c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 674c42da999SVladimir Kondratiev /* The destination station is associated to 675c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 676c42da999SVladimir Kondratiev * directly to it and do not pass it to local 677c42da999SVladimir Kondratiev * net stack. 678c42da999SVladimir Kondratiev */ 679c42da999SVladimir Kondratiev xmit_skb = skb; 680c42da999SVladimir Kondratiev skb = NULL; 681c42da999SVladimir Kondratiev } 682c42da999SVladimir Kondratiev } 683c42da999SVladimir Kondratiev } 684c42da999SVladimir Kondratiev if (xmit_skb) { 685c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 686c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 687c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 688c42da999SVladimir Kondratiev */ 689c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 690c42da999SVladimir Kondratiev xmit_skb->priority += 256; 691c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 692c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 693c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 694c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 695c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 696c42da999SVladimir Kondratiev } 697c42da999SVladimir Kondratiev 698c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 699c42da999SVladimir Kondratiev 700c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 701c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 702c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 703c42da999SVladimir Kondratiev len, gro_res_str[rc]); 704c42da999SVladimir Kondratiev } 70558527421SVladimir Kondratiev stats: 706c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 707b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 708b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 709b5998e6aSVladimir Kondratiev stats->rx_dropped++; 710b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 711b5998e6aSVladimir Kondratiev } else { 7122be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 713c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7142be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 715c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 716c42da999SVladimir Kondratiev if (mcast) 717c42da999SVladimir Kondratiev ndev->stats.multicast++; 718194b482bSVladimir Kondratiev } 7192be7d22fSVladimir Kondratiev } 7202be7d22fSVladimir Kondratiev 7212be7d22fSVladimir Kondratiev /** 7222be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7232be7d22fSVladimir Kondratiev * 724e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7252be7d22fSVladimir Kondratiev */ 726e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7272be7d22fSVladimir Kondratiev { 7282be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 7292be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 7302be7d22fSVladimir Kondratiev struct sk_buff *skb; 7312be7d22fSVladimir Kondratiev 73233c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7332be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7342be7d22fSVladimir Kondratiev return; 7352be7d22fSVladimir Kondratiev } 7367743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 737e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 738e0287c4aSVladimir Kondratiev (*quota)--; 7392be7d22fSVladimir Kondratiev 7402be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 7412be7d22fSVladimir Kondratiev skb->dev = ndev; 7422be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7432be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7442be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7452be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 746b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7472be7d22fSVladimir Kondratiev } else { 748b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 7492be7d22fSVladimir Kondratiev } 7502be7d22fSVladimir Kondratiev } 7512be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 7522be7d22fSVladimir Kondratiev } 7532be7d22fSVladimir Kondratiev 754d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 7552be7d22fSVladimir Kondratiev { 7562be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7572be7d22fSVladimir Kondratiev int rc; 7582be7d22fSVladimir Kondratiev 7599cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 7609cf10d62SVladimir Kondratiev 7618bf6adb9SVladimir Kondratiev if (vring->va) { 7628bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 7638bf6adb9SVladimir Kondratiev return -EINVAL; 7648bf6adb9SVladimir Kondratiev } 7658bf6adb9SVladimir Kondratiev 766d3762b40SVladimir Kondratiev vring->size = size; 7672be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7682be7d22fSVladimir Kondratiev if (rc) 7692be7d22fSVladimir Kondratiev return rc; 7702be7d22fSVladimir Kondratiev 77147e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 7722be7d22fSVladimir Kondratiev if (rc) 7732be7d22fSVladimir Kondratiev goto err_free; 7742be7d22fSVladimir Kondratiev 7752be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 7762be7d22fSVladimir Kondratiev if (rc) 7772be7d22fSVladimir Kondratiev goto err_free; 7782be7d22fSVladimir Kondratiev 7792be7d22fSVladimir Kondratiev return 0; 7802be7d22fSVladimir Kondratiev err_free: 7812be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7822be7d22fSVladimir Kondratiev 7832be7d22fSVladimir Kondratiev return rc; 7842be7d22fSVladimir Kondratiev } 7852be7d22fSVladimir Kondratiev 7862be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 7872be7d22fSVladimir Kondratiev { 7882be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7892be7d22fSVladimir Kondratiev 7909cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 7919cf10d62SVladimir Kondratiev 7922acb4220SVladimir Kondratiev if (vring->va) 7932be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7942be7d22fSVladimir Kondratiev } 7952be7d22fSVladimir Kondratiev 796875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 797875e9439SMaya Erez { 798875e9439SMaya Erez spin_lock_bh(&txdata->lock); 799875e9439SMaya Erez txdata->dot1x_open = 0; 800875e9439SMaya Erez txdata->enabled = 0; 801875e9439SMaya Erez txdata->idle = 0; 802875e9439SMaya Erez txdata->last_idle = 0; 803875e9439SMaya Erez txdata->begin = 0; 804875e9439SMaya Erez txdata->agg_wsize = 0; 805875e9439SMaya Erez txdata->agg_timeout = 0; 806875e9439SMaya Erez txdata->agg_amsdu = 0; 807875e9439SMaya Erez txdata->addba_in_progress = false; 808875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 809875e9439SMaya Erez } 810875e9439SMaya Erez 8112be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 8122be7d22fSVladimir Kondratiev int cid, int tid) 8132be7d22fSVladimir Kondratiev { 8142be7d22fSVladimir Kondratiev int rc; 8152be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 8162be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 8172be7d22fSVladimir Kondratiev .vring_cfg = { 8182be7d22fSVladimir Kondratiev .tx_sw_ring = { 8199a06bec9SVladimir Kondratiev .max_mpdu_size = 820c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 821b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 8222be7d22fSVladimir Kondratiev }, 8232be7d22fSVladimir Kondratiev .ringid = id, 824a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 8252be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 8262be7d22fSVladimir Kondratiev .mac_ctrl = 0, 8272be7d22fSVladimir Kondratiev .to_resolution = 0, 8283277213fSVladimir Kondratiev .agg_max_wsize = 0, 8292be7d22fSVladimir Kondratiev .schd_params = { 8302be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 8312be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 8322be7d22fSVladimir Kondratiev }, 8332be7d22fSVladimir Kondratiev }, 8342be7d22fSVladimir Kondratiev }; 8352be7d22fSVladimir Kondratiev struct { 836b874ddecSLior David struct wmi_cmd_hdr wmi; 8372be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 8382be7d22fSVladimir Kondratiev } __packed reply; 8392be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 840097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8412be7d22fSVladimir Kondratiev 842e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 843e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8449b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 8459cf10d62SVladimir Kondratiev 8462be7d22fSVladimir Kondratiev if (vring->va) { 8472be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 8482be7d22fSVladimir Kondratiev rc = -EINVAL; 8492be7d22fSVladimir Kondratiev goto out; 8502be7d22fSVladimir Kondratiev } 8512be7d22fSVladimir Kondratiev 852875e9439SMaya Erez wil_tx_data_init(txdata); 8532be7d22fSVladimir Kondratiev vring->size = size; 8542be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8552be7d22fSVladimir Kondratiev if (rc) 8562be7d22fSVladimir Kondratiev goto out; 8572be7d22fSVladimir Kondratiev 85893ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 85993ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 86093ae6d49SVladimir Kondratiev 8612be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 8622be7d22fSVladimir Kondratiev 863230d8442SVladimir Kondratiev if (!wil->privacy) 864230d8442SVladimir Kondratiev txdata->dot1x_open = true; 8652be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 8662be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 8672be7d22fSVladimir Kondratiev if (rc) 8682be7d22fSVladimir Kondratiev goto out_free; 8692be7d22fSVladimir Kondratiev 870b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 8712be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 8722be7d22fSVladimir Kondratiev reply.cmd.status); 873c331997bSVladimir Kondratiev rc = -EINVAL; 8742be7d22fSVladimir Kondratiev goto out_free; 8752be7d22fSVladimir Kondratiev } 8762be7d22fSVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 8772be7d22fSVladimir Kondratiev 878097638a0SVladimir Kondratiev txdata->enabled = 1; 879230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 8803a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 881097638a0SVladimir Kondratiev 8822be7d22fSVladimir Kondratiev return 0; 8832be7d22fSVladimir Kondratiev out_free: 884875e9439SMaya Erez spin_lock_bh(&txdata->lock); 885230d8442SVladimir Kondratiev txdata->dot1x_open = false; 886230d8442SVladimir Kondratiev txdata->enabled = 0; 887875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 8882be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8890916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 8900916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 8910916d9f2SMaya Erez 8922be7d22fSVladimir Kondratiev out: 8932be7d22fSVladimir Kondratiev 8942be7d22fSVladimir Kondratiev return rc; 8952be7d22fSVladimir Kondratiev } 8962be7d22fSVladimir Kondratiev 89741d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 89841d6b093SVladimir Kondratiev { 89941d6b093SVladimir Kondratiev int rc; 90041d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 90141d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 90241d6b093SVladimir Kondratiev .vring_cfg = { 90341d6b093SVladimir Kondratiev .tx_sw_ring = { 90441d6b093SVladimir Kondratiev .max_mpdu_size = 90541d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 90641d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 90741d6b093SVladimir Kondratiev }, 90841d6b093SVladimir Kondratiev .ringid = id, 90941d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 91041d6b093SVladimir Kondratiev }, 91141d6b093SVladimir Kondratiev }; 91241d6b093SVladimir Kondratiev struct { 913b874ddecSLior David struct wmi_cmd_hdr wmi; 91441d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 91541d6b093SVladimir Kondratiev } __packed reply; 91641d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 91741d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 91841d6b093SVladimir Kondratiev 91941d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 92041d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9219b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 92241d6b093SVladimir Kondratiev 92341d6b093SVladimir Kondratiev if (vring->va) { 92441d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 92541d6b093SVladimir Kondratiev rc = -EINVAL; 92641d6b093SVladimir Kondratiev goto out; 92741d6b093SVladimir Kondratiev } 92841d6b093SVladimir Kondratiev 929875e9439SMaya Erez wil_tx_data_init(txdata); 93041d6b093SVladimir Kondratiev vring->size = size; 93141d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 93241d6b093SVladimir Kondratiev if (rc) 93341d6b093SVladimir Kondratiev goto out; 93441d6b093SVladimir Kondratiev 93541d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 93641d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 93741d6b093SVladimir Kondratiev 93841d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 93941d6b093SVladimir Kondratiev 940230d8442SVladimir Kondratiev if (!wil->privacy) 941230d8442SVladimir Kondratiev txdata->dot1x_open = true; 94241d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 94341d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 94441d6b093SVladimir Kondratiev if (rc) 94541d6b093SVladimir Kondratiev goto out_free; 94641d6b093SVladimir Kondratiev 94741d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 94841d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 94941d6b093SVladimir Kondratiev reply.cmd.status); 95041d6b093SVladimir Kondratiev rc = -EINVAL; 95141d6b093SVladimir Kondratiev goto out_free; 95241d6b093SVladimir Kondratiev } 95341d6b093SVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 95441d6b093SVladimir Kondratiev 95541d6b093SVladimir Kondratiev txdata->enabled = 1; 95641d6b093SVladimir Kondratiev 95741d6b093SVladimir Kondratiev return 0; 95841d6b093SVladimir Kondratiev out_free: 959875e9439SMaya Erez spin_lock_bh(&txdata->lock); 960230d8442SVladimir Kondratiev txdata->enabled = 0; 961230d8442SVladimir Kondratiev txdata->dot1x_open = false; 962875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 96341d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 96441d6b093SVladimir Kondratiev out: 96541d6b093SVladimir Kondratiev 96641d6b093SVladimir Kondratiev return rc; 96741d6b093SVladimir Kondratiev } 96841d6b093SVladimir Kondratiev 9692be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 9702be7d22fSVladimir Kondratiev { 9712be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 9723a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9732be7d22fSVladimir Kondratiev 9749b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 975097638a0SVladimir Kondratiev 9762be7d22fSVladimir Kondratiev if (!vring->va) 9772be7d22fSVladimir Kondratiev return; 9782be7d22fSVladimir Kondratiev 9799cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 9809cf10d62SVladimir Kondratiev 9815933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 982230d8442SVladimir Kondratiev txdata->dot1x_open = false; 9835933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 9845933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 98534b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 98634b8886eSMaya Erez * not prevent the next NAPI run. 98734b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 98834b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 98934b8886eSMaya Erez * handle this vring 99034b8886eSMaya Erez */ 99134b8886eSMaya Erez wmb(); 992097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 9939419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 994097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 995097638a0SVladimir Kondratiev 9962be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9972be7d22fSVladimir Kondratiev } 9982be7d22fSVladimir Kondratiev 99941d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 10002be7d22fSVladimir Kondratiev struct sk_buff *skb) 10012be7d22fSVladimir Kondratiev { 10023df2cd36SVladimir Kondratiev int i; 10033df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 10043df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 10052be7d22fSVladimir Kondratiev 10063df2cd36SVladimir Kondratiev if (cid < 0) 10073df2cd36SVladimir Kondratiev return NULL; 10083df2cd36SVladimir Kondratiev 10093df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 10103df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1011230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1012230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1013230d8442SVladimir Kondratiev continue; 10143df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 10153df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1016b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 10178fe59627SVladimir Kondratiev 10183df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 10193df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 1020b729aaf0SMaya Erez if (v->va && txdata->enabled) { 10212be7d22fSVladimir Kondratiev return v; 10223df2cd36SVladimir Kondratiev } else { 10233df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 10243df2cd36SVladimir Kondratiev return NULL; 10253df2cd36SVladimir Kondratiev } 10263df2cd36SVladimir Kondratiev } 10273df2cd36SVladimir Kondratiev } 10282be7d22fSVladimir Kondratiev 10292be7d22fSVladimir Kondratiev return NULL; 10302be7d22fSVladimir Kondratiev } 10312be7d22fSVladimir Kondratiev 1032fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1033fb3cac57SVladimir Kondratiev struct sk_buff *skb); 103454ed90a8SVladimir Kondratiev 103554ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 103654ed90a8SVladimir Kondratiev struct sk_buff *skb) 103754ed90a8SVladimir Kondratiev { 103854ed90a8SVladimir Kondratiev struct vring *v; 103954ed90a8SVladimir Kondratiev int i; 104054ed90a8SVladimir Kondratiev u8 cid; 1041b729aaf0SMaya Erez struct vring_tx_data *txdata; 104254ed90a8SVladimir Kondratiev 104354ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 104454ed90a8SVladimir Kondratiev * for the AP we connected to. 1045230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 104654ed90a8SVladimir Kondratiev */ 104754ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 104854ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1049b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1050b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 105154ed90a8SVladimir Kondratiev continue; 105254ed90a8SVladimir Kondratiev 105354ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 105441d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 105541d6b093SVladimir Kondratiev continue; 105641d6b093SVladimir Kondratiev 1057230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 105854ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1059230d8442SVladimir Kondratiev continue; 106054ed90a8SVladimir Kondratiev 106154ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 106254ed90a8SVladimir Kondratiev 106354ed90a8SVladimir Kondratiev return v; 106454ed90a8SVladimir Kondratiev } 106554ed90a8SVladimir Kondratiev 106654ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 106754ed90a8SVladimir Kondratiev 106854ed90a8SVladimir Kondratiev return NULL; 106954ed90a8SVladimir Kondratiev } 107054ed90a8SVladimir Kondratiev 107170812421SVladimir Kondratiev /* Use one of 2 strategies: 107270812421SVladimir Kondratiev * 107370812421SVladimir Kondratiev * 1. New (real broadcast): 107470812421SVladimir Kondratiev * use dedicated broadcast vring 107570812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 107670812421SVladimir Kondratiev * Find 1-st vring and return it; 107770812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 107870812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 107970812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 108070812421SVladimir Kondratiev * - for PBSS 108170812421SVladimir Kondratiev */ 108270812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1083fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1084fb3cac57SVladimir Kondratiev { 108541d6b093SVladimir Kondratiev struct vring *v; 1086b729aaf0SMaya Erez struct vring_tx_data *txdata; 108741d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1088fb3cac57SVladimir Kondratiev 108941d6b093SVladimir Kondratiev if (i < 0) 109041d6b093SVladimir Kondratiev return NULL; 1091fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1092b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1093b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1094fb3cac57SVladimir Kondratiev return NULL; 1095230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1096230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1097230d8442SVladimir Kondratiev return NULL; 1098fb3cac57SVladimir Kondratiev 1099fb3cac57SVladimir Kondratiev return v; 1100fb3cac57SVladimir Kondratiev } 1101fb3cac57SVladimir Kondratiev 110270812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 110370812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 110470812421SVladimir Kondratiev { 110570812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 110670812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 110770812421SVladimir Kondratiev 110870812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 110970812421SVladimir Kondratiev } 111070812421SVladimir Kondratiev 111170812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 111270812421SVladimir Kondratiev struct sk_buff *skb) 111370812421SVladimir Kondratiev { 111470812421SVladimir Kondratiev struct vring *v, *v2; 111570812421SVladimir Kondratiev struct sk_buff *skb2; 111670812421SVladimir Kondratiev int i; 111770812421SVladimir Kondratiev u8 cid; 111870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 111970812421SVladimir Kondratiev char *src = eth->h_source; 1120b729aaf0SMaya Erez struct vring_tx_data *txdata; 112170812421SVladimir Kondratiev 112270812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 112370812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 112470812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1125b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1126b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 112770812421SVladimir Kondratiev continue; 112870812421SVladimir Kondratiev 112970812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 113070812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 113170812421SVladimir Kondratiev continue; 1132230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1133230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 113470812421SVladimir Kondratiev continue; 113570812421SVladimir Kondratiev 113670812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 113770812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 113870812421SVladimir Kondratiev continue; 113970812421SVladimir Kondratiev 114070812421SVladimir Kondratiev goto found; 114170812421SVladimir Kondratiev } 114270812421SVladimir Kondratiev 114370812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 114470812421SVladimir Kondratiev 114570812421SVladimir Kondratiev return NULL; 114670812421SVladimir Kondratiev 114770812421SVladimir Kondratiev found: 114870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 114970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 115070812421SVladimir Kondratiev 115170812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 115270812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 115370812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 115470812421SVladimir Kondratiev if (!v2->va) 115570812421SVladimir Kondratiev continue; 115670812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 115770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 115870812421SVladimir Kondratiev continue; 1159230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1160230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 116170812421SVladimir Kondratiev continue; 116270812421SVladimir Kondratiev 116370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 116470812421SVladimir Kondratiev continue; 116570812421SVladimir Kondratiev 116670812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 116770812421SVladimir Kondratiev if (skb2) { 116870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 116970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 117070812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 117170812421SVladimir Kondratiev } else { 117270812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 117370812421SVladimir Kondratiev } 117470812421SVladimir Kondratiev } 117570812421SVladimir Kondratiev 117670812421SVladimir Kondratiev return v; 117770812421SVladimir Kondratiev } 117870812421SVladimir Kondratiev 117970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 118070812421SVladimir Kondratiev struct sk_buff *skb) 118170812421SVladimir Kondratiev { 118270812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 118370812421SVladimir Kondratiev 118470812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 118570812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 118670812421SVladimir Kondratiev 118770812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 118870812421SVladimir Kondratiev } 118970812421SVladimir Kondratiev 119099b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 119199b55bd2SKirshenbaum Erez int vring_index) 11922be7d22fSVladimir Kondratiev { 119368ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 11942be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 11952be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 11962be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 11972be7d22fSVladimir Kondratiev d->dma.error = 0; 11982be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11997e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 120099b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 12012be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 12022be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 12032be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 12042be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 12052be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 12062be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 12072be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 12082be7d22fSVladimir Kondratiev 12092be7d22fSVladimir Kondratiev return 0; 12102be7d22fSVladimir Kondratiev } 12112be7d22fSVladimir Kondratiev 1212c236658fSVladimir Kondratiev static inline 1213c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1214c236658fSVladimir Kondratiev { 12153d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1216c236658fSVladimir Kondratiev } 1217c236658fSVladimir Kondratiev 12183d4bde15SVladimir Kondratiev /** 12193d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12203d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12213d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12223d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 12233d4bde15SVladimir Kondratiev */ 12243d4bde15SVladimir Kondratiev 12253d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 12263d4bde15SVladimir Kondratiev struct sk_buff *skb, 12273d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 12283d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1229504937d4SKirshenbaum Erez { 12303d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 12313d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 12323d4bde15SVladimir Kondratiev 12333d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 12343d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 12353d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 12363d4bde15SVladimir Kondratiev 12373d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 12383d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 12393d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 12403d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 12413d4bde15SVladimir Kondratiev 12423d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 12433d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 12443d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 12453d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 12463d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 12473d4bde15SVladimir Kondratiev } 12483d4bde15SVladimir Kondratiev 12493d4bde15SVladimir Kondratiev /** 12503d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 12513d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12523d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 12533d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 12543d4bde15SVladimir Kondratiev * 12553d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 12563d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 12573d4bde15SVladimir Kondratiev */ 12583d4bde15SVladimir Kondratiev 12593d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 12603d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1261504937d4SKirshenbaum Erez int protocol; 1262504937d4SKirshenbaum Erez 1263504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1264504937d4SKirshenbaum Erez return 0; 1265504937d4SKirshenbaum Erez 1266df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1267df2d08eeSVladimir Kondratiev 1268504937d4SKirshenbaum Erez switch (skb->protocol) { 1269504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1270504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1271df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1272504937d4SKirshenbaum Erez break; 1273504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1274504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1275504937d4SKirshenbaum Erez break; 1276504937d4SKirshenbaum Erez default: 1277504937d4SKirshenbaum Erez return -EINVAL; 1278504937d4SKirshenbaum Erez } 1279504937d4SKirshenbaum Erez 1280504937d4SKirshenbaum Erez switch (protocol) { 1281504937d4SKirshenbaum Erez case IPPROTO_TCP: 1282504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1283504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1284504937d4SKirshenbaum Erez d->dma.d0 |= 1285504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1286504937d4SKirshenbaum Erez break; 1287504937d4SKirshenbaum Erez case IPPROTO_UDP: 1288504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1289504937d4SKirshenbaum Erez d->dma.d0 |= 1290504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1291504937d4SKirshenbaum Erez break; 1292504937d4SKirshenbaum Erez default: 1293504937d4SKirshenbaum Erez return -EINVAL; 1294504937d4SKirshenbaum Erez } 1295504937d4SKirshenbaum Erez 1296504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1297504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1298504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1299504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1300504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1301504937d4SKirshenbaum Erez 1302504937d4SKirshenbaum Erez return 0; 1303504937d4SKirshenbaum Erez } 1304504937d4SKirshenbaum Erez 13053d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13063d4bde15SVladimir Kondratiev { 13073d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13083d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13093d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13103d4bde15SVladimir Kondratiev } 13113d4bde15SVladimir Kondratiev 13123d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13133d4bde15SVladimir Kondratiev { 13143d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13153d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13163d4bde15SVladimir Kondratiev } 13173d4bde15SVladimir Kondratiev 13183d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 13193d4bde15SVladimir Kondratiev struct sk_buff *skb) 13203d4bde15SVladimir Kondratiev { 13213d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13223d4bde15SVladimir Kondratiev 13233d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 13243d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 13253d4bde15SVladimir Kondratiev *_first_desc = NULL; 13263d4bde15SVladimir Kondratiev 13273d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 13283d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 13293d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 13303d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 13313d4bde15SVladimir Kondratiev 13323d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 13333d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 13343d4bde15SVladimir Kondratiev 13353d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 13363d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 13373d4bde15SVladimir Kondratiev 13383d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 13393d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 13403d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 13413d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 13423d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 13433d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 13443d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 13453d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 13463d4bde15SVladimir Kondratiev uint i = swhead; 13473d4bde15SVladimir Kondratiev dma_addr_t pa; 13483d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 13493d4bde15SVladimir Kondratiev int rem_data = mss; 13503d4bde15SVladimir Kondratiev int lenmss; 13513d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 13523d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 13533d4bde15SVladimir Kondratiev bool is_ipv4; 13543d4bde15SVladimir Kondratiev int tcp_hdr_len; 13553d4bde15SVladimir Kondratiev int skb_net_hdr_len; 13563d4bde15SVladimir Kondratiev int gso_type; 1357e3d2ed94SHamad Kadmany int rc = -EINVAL; 13583d4bde15SVladimir Kondratiev 13593d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 13603d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 13613d4bde15SVladimir Kondratiev 13623d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 13633d4bde15SVladimir Kondratiev return -EINVAL; 13643d4bde15SVladimir Kondratiev 13653d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 13663d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 13673d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 13683d4bde15SVladimir Kondratiev * this is the initial check only. 13693d4bde15SVladimir Kondratiev */ 13703d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 13713d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 13723d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 13733d4bde15SVladimir Kondratiev vring_index, min_desc_required); 13743d4bde15SVladimir Kondratiev return -ENOMEM; 13753d4bde15SVladimir Kondratiev } 13763d4bde15SVladimir Kondratiev 13773d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 13783d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 13793d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 13803d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 13813d4bde15SVladimir Kondratiev 13823d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 13833d4bde15SVladimir Kondratiev switch (gso_type) { 13843d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 13853d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 13863d4bde15SVladimir Kondratiev * as required by the offloading doc 13873d4bde15SVladimir Kondratiev */ 13883d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 13893d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 13903d4bde15SVladimir Kondratiev is_ipv4 = true; 13913d4bde15SVladimir Kondratiev break; 13923d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 13933d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 13943d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 13953d4bde15SVladimir Kondratiev is_ipv4 = false; 13963d4bde15SVladimir Kondratiev break; 13973d4bde15SVladimir Kondratiev default: 13983d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 13993d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14003d4bde15SVladimir Kondratiev */ 14013d4bde15SVladimir Kondratiev return -EINVAL; 14023d4bde15SVladimir Kondratiev } 14033d4bde15SVladimir Kondratiev 14043d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14053d4bde15SVladimir Kondratiev return -EINVAL; 14063d4bde15SVladimir Kondratiev 14073d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14083d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14093d4bde15SVladimir Kondratiev */ 14103d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14113d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14123d4bde15SVladimir Kondratiev 14133d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 14143d4bde15SVladimir Kondratiev 14153d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14163d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 14173d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 14183d4bde15SVladimir Kondratiev goto err_exit; 14193d4bde15SVladimir Kondratiev } 14203d4bde15SVladimir Kondratiev 14213d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 14223d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 14233d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 14243d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 14253d4bde15SVladimir Kondratiev 14263d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14273d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 14283d4bde15SVladimir Kondratiev 14293d4bde15SVladimir Kondratiev descs_used++; 14303d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 14313d4bde15SVladimir Kondratiev 14323d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 14333d4bde15SVladimir Kondratiev if (headlen) { 14343d4bde15SVladimir Kondratiev len = headlen; 14353d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 14363d4bde15SVladimir Kondratiev len); 14373d4bde15SVladimir Kondratiev } else { 14383d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 14393d4bde15SVladimir Kondratiev len = frag->size; 14403d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 14413d4bde15SVladimir Kondratiev } 14423d4bde15SVladimir Kondratiev 14433d4bde15SVladimir Kondratiev while (len) { 14443d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14453d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 14463d4bde15SVladimir Kondratiev len, rem_data, descs_used); 14473d4bde15SVladimir Kondratiev 14483d4bde15SVladimir Kondratiev if (descs_used == avail) { 1449e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1450e3d2ed94SHamad Kadmany rc = -ENOMEM; 1451e3d2ed94SHamad Kadmany goto mem_error; 14523d4bde15SVladimir Kondratiev } 14533d4bde15SVladimir Kondratiev 14543d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 14553d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14563d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 14573d4bde15SVladimir Kondratiev 14583d4bde15SVladimir Kondratiev if (!headlen) { 14593d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 14603d4bde15SVladimir Kondratiev frag->size - len, lenmss, 14613d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14623d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 14633d4bde15SVladimir Kondratiev } else { 14643d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 14653d4bde15SVladimir Kondratiev skb->data + 14663d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 14673d4bde15SVladimir Kondratiev lenmss, 14683d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14693d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14703d4bde15SVladimir Kondratiev headlen -= lenmss; 14713d4bde15SVladimir Kondratiev } 14723d4bde15SVladimir Kondratiev 1473e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1474e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1475e3d2ed94SHamad Kadmany goto mem_error; 1476e3d2ed94SHamad Kadmany } 14773d4bde15SVladimir Kondratiev 14783d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14793d4bde15SVladimir Kondratiev 14803d4bde15SVladimir Kondratiev if (!_first_desc) { 14813d4bde15SVladimir Kondratiev _first_desc = _desc; 14823d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 14833d4bde15SVladimir Kondratiev d = first_desc; 14843d4bde15SVladimir Kondratiev } else { 14853d4bde15SVladimir Kondratiev d = &desc_mem; 14863d4bde15SVladimir Kondratiev } 14873d4bde15SVladimir Kondratiev 14883d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 14893d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 14903d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 14913d4bde15SVladimir Kondratiev skb_net_hdr_len); 14923d4bde15SVladimir Kondratiev 14933d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 14943d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 14953d4bde15SVladimir Kondratiev 14963d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 14973d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 14983d4bde15SVladimir Kondratiev len -= lenmss; 14993d4bde15SVladimir Kondratiev rem_data -= lenmss; 15003d4bde15SVladimir Kondratiev 15013d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15023d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15033d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15043d4bde15SVladimir Kondratiev 15053d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15063d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15073d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15083d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15093d4bde15SVladimir Kondratiev * release 15103d4bde15SVladimir Kondratiev */ 15113d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15123d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15133d4bde15SVladimir Kondratiev sg_desc_cnt + 15143d4bde15SVladimir Kondratiev 1); 15153d4bde15SVladimir Kondratiev hdr_compensation_need = false; 15163d4bde15SVladimir Kondratiev } else { 15173d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15183d4bde15SVladimir Kondratiev sg_desc_cnt); 15193d4bde15SVladimir Kondratiev } 15203d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 15213d4bde15SVladimir Kondratiev 15223d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 15233d4bde15SVladimir Kondratiev 15243d4bde15SVladimir Kondratiev /* first descriptor may also be the last 15253d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 15263d4bde15SVladimir Kondratiev * it twice 15273d4bde15SVladimir Kondratiev */ 15283d4bde15SVladimir Kondratiev if (first_desc != d) 15293d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 15303d4bde15SVladimir Kondratiev 15313d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 15323d4bde15SVladimir Kondratiev * of this TS processing 15333d4bde15SVladimir Kondratiev */ 15343d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 15353d4bde15SVladimir Kondratiev *_desc = *d; 15363d4bde15SVladimir Kondratiev 15373d4bde15SVladimir Kondratiev rem_data = mss; 15383d4bde15SVladimir Kondratiev _first_desc = NULL; 15393d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 15403d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 15413d4bde15SVladimir Kondratiev *_desc = *d; 15423d4bde15SVladimir Kondratiev } 15433d4bde15SVladimir Kondratiev } 15443d4bde15SVladimir Kondratiev 15453d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 15463d4bde15SVladimir Kondratiev * in this case d pointer is invalid 15473d4bde15SVladimir Kondratiev */ 15483d4bde15SVladimir Kondratiev if (_first_desc == _desc) 15493d4bde15SVladimir Kondratiev d = first_desc; 15503d4bde15SVladimir Kondratiev 15513d4bde15SVladimir Kondratiev /* Last data descriptor */ 15523d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 15533d4bde15SVladimir Kondratiev *_desc = *d; 15543d4bde15SVladimir Kondratiev 15553d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 15563d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 15573d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 15583d4bde15SVladimir Kondratiev 15593d4bde15SVladimir Kondratiev /* hold reference to skb 15603d4bde15SVladimir Kondratiev * to prevent skb release before accounting 15613d4bde15SVladimir Kondratiev * in case of immediate "tx done" 15623d4bde15SVladimir Kondratiev */ 15633d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15643d4bde15SVladimir Kondratiev 15653d4bde15SVladimir Kondratiev /* performance monitoring */ 15663d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 15673d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 15683d4bde15SVladimir Kondratiev used, used + descs_used)) { 15693d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15703d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15713d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 15723d4bde15SVladimir Kondratiev } 15733d4bde15SVladimir Kondratiev 1574eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1575eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1576eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1577eb26cff1SMaya Erez * skb before it was completed. 1578eb26cff1SMaya Erez */ 1579eb26cff1SMaya Erez wmb(); 1580eb26cff1SMaya Erez 15813d4bde15SVladimir Kondratiev /* advance swhead */ 15823d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1583e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 15843d4bde15SVladimir Kondratiev 15853d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 15863d4bde15SVladimir Kondratiev * committing them to HW 15873d4bde15SVladimir Kondratiev */ 15883d4bde15SVladimir Kondratiev wmb(); 15893d4bde15SVladimir Kondratiev 1590b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 15913d4bde15SVladimir Kondratiev return 0; 15923d4bde15SVladimir Kondratiev 1593e3d2ed94SHamad Kadmany mem_error: 15943d4bde15SVladimir Kondratiev while (descs_used > 0) { 15953d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 15963d4bde15SVladimir Kondratiev 15973d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15983d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 15993d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 16003d4bde15SVladimir Kondratiev *d = *_desc; 16013d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16023d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16033d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 16043d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16053d4bde15SVladimir Kondratiev descs_used--; 16063d4bde15SVladimir Kondratiev } 16073d4bde15SVladimir Kondratiev err_exit: 1608e3d2ed94SHamad Kadmany return rc; 16093d4bde15SVladimir Kondratiev } 16103d4bde15SVladimir Kondratiev 16115933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16122be7d22fSVladimir Kondratiev struct sk_buff *skb) 16132be7d22fSVladimir Kondratiev { 16142be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 161568ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 161668ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 16172be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 16182be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 16192be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1620504937d4SKirshenbaum Erez uint f = 0; 16212be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16227c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16232be7d22fSVladimir Kondratiev uint i = swhead; 16242be7d22fSVladimir Kondratiev dma_addr_t pa; 16250436fd9aSVladimir Shulman int used; 162641d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 162741d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 16282be7d22fSVladimir Kondratiev 16293d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 16303d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 16312be7d22fSVladimir Kondratiev 16325933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 16335933a06dSVladimir Kondratiev return -EINVAL; 16345933a06dSVladimir Kondratiev 163533c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 163670801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 16375b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 16385b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 16392be7d22fSVladimir Kondratiev return -ENOMEM; 16402be7d22fSVladimir Kondratiev } 16418fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16422be7d22fSVladimir Kondratiev 16438fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 16442be7d22fSVladimir Kondratiev 16455b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 16465b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 16477743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 16482be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 16492be7d22fSVladimir Kondratiev 16502be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 16512be7d22fSVladimir Kondratiev return -EINVAL; 16522232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16532be7d22fSVladimir Kondratiev /* 1-st segment */ 165441d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 165541d6b093SVladimir Kondratiev if (unlikely(mcast)) { 165641d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1657230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 165841d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 165941d6b093SVladimir Kondratiev } 1660504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 16613d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 16625b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1663504937d4SKirshenbaum Erez vring_index); 1664504937d4SKirshenbaum Erez goto dma_error; 1665504937d4SKirshenbaum Erez } 1666504937d4SKirshenbaum Erez 1667c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 16683d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 166968ada71eSVladimir Kondratiev 16702be7d22fSVladimir Kondratiev /* middle segments */ 1671504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 16722be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 16732be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 16742be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 16758fe59627SVladimir Kondratiev 1676e59d16c0SVladimir Kondratiev *_d = *d; 16775b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 16785b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 16795b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 16802be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 16818fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16822be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 16832be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1684e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1685e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1686e3d2ed94SHamad Kadmany vring_index); 16872be7d22fSVladimir Kondratiev goto dma_error; 1688e3d2ed94SHamad Kadmany } 16892232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 169099b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1691c236658fSVladimir Kondratiev /* no need to check return code - 1692c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1693c236658fSVladimir Kondratiev * it will succeed here too 1694c236658fSVladimir Kondratiev */ 16953d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 16962be7d22fSVladimir Kondratiev } 16972be7d22fSVladimir Kondratiev /* for the last seg only */ 16982be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1699668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17002be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 170168ada71eSVladimir Kondratiev *_d = *d; 17025b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17035b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17045b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17052be7d22fSVladimir Kondratiev 17066cdadd4dSVladimir Kondratiev /* hold reference to skb 17076cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17086cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17096cdadd4dSVladimir Kondratiev */ 17106cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17116cdadd4dSVladimir Kondratiev 17120436fd9aSVladimir Shulman /* performance monitoring */ 17130436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 17140436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 17150436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 17167c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17170436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17180436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 17190436fd9aSVladimir Shulman } 17207c0acf86SVladimir Kondratiev 1721eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1722eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1723eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1724eb26cff1SMaya Erez * skb before it was completed. 1725eb26cff1SMaya Erez */ 1726eb26cff1SMaya Erez wmb(); 1727eb26cff1SMaya Erez 17282be7d22fSVladimir Kondratiev /* advance swhead */ 17292be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 17305b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 17315b29c573SVladimir Kondratiev vring->swhead); 173298658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 17333d4bde15SVladimir Kondratiev 17343d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17353d4bde15SVladimir Kondratiev * committing them to HW 17363d4bde15SVladimir Kondratiev */ 17373d4bde15SVladimir Kondratiev wmb(); 17383d4bde15SVladimir Kondratiev 1739b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17402be7d22fSVladimir Kondratiev 17412be7d22fSVladimir Kondratiev return 0; 17422be7d22fSVladimir Kondratiev dma_error: 17432be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1744c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1745c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1746c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 17477e594444SVladimir Kondratiev 17482be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1749c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 17508fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 175168ada71eSVladimir Kondratiev *d = *_d; 175268ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 17532232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1754f88f113aSVladimir Kondratiev 1755f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17562be7d22fSVladimir Kondratiev } 17572be7d22fSVladimir Kondratiev 17582be7d22fSVladimir Kondratiev return -EINVAL; 17592be7d22fSVladimir Kondratiev } 17602be7d22fSVladimir Kondratiev 17615933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17625933a06dSVladimir Kondratiev struct sk_buff *skb) 17635933a06dSVladimir Kondratiev { 17645933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17655933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17665933a06dSVladimir Kondratiev int rc; 17675933a06dSVladimir Kondratiev 17685933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 17693d4bde15SVladimir Kondratiev 17703d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 17713d4bde15SVladimir Kondratiev (wil, vring, skb); 17723d4bde15SVladimir Kondratiev 17735933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 17743d4bde15SVladimir Kondratiev 17755933a06dSVladimir Kondratiev return rc; 17765933a06dSVladimir Kondratiev } 17775933a06dSVladimir Kondratiev 17782be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 17792be7d22fSVladimir Kondratiev { 17802be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 17813df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 178241d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 17832be7d22fSVladimir Kondratiev struct vring *vring; 1784aa27deaaSVladimir Kondratiev static bool pr_once_fw; 17852be7d22fSVladimir Kondratiev int rc; 17862be7d22fSVladimir Kondratiev 17877743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 178833c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1789aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 17902be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1791aa27deaaSVladimir Kondratiev pr_once_fw = true; 1792aa27deaaSVladimir Kondratiev } 17932be7d22fSVladimir Kondratiev goto drop; 17942be7d22fSVladimir Kondratiev } 179533c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1796d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 17972be7d22fSVladimir Kondratiev goto drop; 17982be7d22fSVladimir Kondratiev } 179933c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 18002be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 18012be7d22fSVladimir Kondratiev goto drop; 18022be7d22fSVladimir Kondratiev } 1803aa27deaaSVladimir Kondratiev pr_once_fw = false; 1804d58db4e4SVladimir Kondratiev 18052be7d22fSVladimir Kondratiev /* find vring */ 180654ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 180754ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 180854ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 180954ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 181041d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 181141d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 181254ed90a8SVladimir Kondratiev } 181333c477fdSVladimir Kondratiev if (unlikely(!vring)) { 18145aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 18152be7d22fSVladimir Kondratiev goto drop; 18162be7d22fSVladimir Kondratiev } 18172be7d22fSVladimir Kondratiev /* set up vring entry */ 18182be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1819d58db4e4SVladimir Kondratiev 18202232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 182133c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 18222232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 182355f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 182455f8f680SVladimir Kondratiev } 18252232abd5SVladimir Kondratiev 18262be7d22fSVladimir Kondratiev switch (rc) { 18272be7d22fSVladimir Kondratiev case 0: 1828795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 18292be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 18302be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 18312be7d22fSVladimir Kondratiev case -ENOMEM: 18322be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 18332be7d22fSVladimir Kondratiev default: 1834afda8bb5SVladimir Kondratiev break; /* goto drop; */ 18352be7d22fSVladimir Kondratiev } 18362be7d22fSVladimir Kondratiev drop: 18372be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 18382be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 18392be7d22fSVladimir Kondratiev 18402be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 18412be7d22fSVladimir Kondratiev } 18422be7d22fSVladimir Kondratiev 1843713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1844713c8a29SVladimir Kondratiev { 1845713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1846713c8a29SVladimir Kondratiev 1847713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1848713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1849713c8a29SVladimir Kondratiev } 1850713c8a29SVladimir Kondratiev 1851713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1852713c8a29SVladimir Kondratiev { 1853713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1854713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1855713c8a29SVladimir Kondratiev else 1856713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1857713c8a29SVladimir Kondratiev } 1858713c8a29SVladimir Kondratiev 18592be7d22fSVladimir Kondratiev /** 18602be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 18612be7d22fSVladimir Kondratiev * 1862e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1863e0287c4aSVladimir Kondratiev * 18642be7d22fSVladimir Kondratiev * Safe to call from IRQ 18652be7d22fSVladimir Kondratiev */ 1866e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 18672be7d22fSVladimir Kondratiev { 1868795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 18692be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 18702be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1871097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1872e0287c4aSVladimir Kondratiev int done = 0; 1873c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 187441d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1875c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 18760436fd9aSVladimir Shulman int used_before_complete; 18770436fd9aSVladimir Shulman int used_new; 18782be7d22fSVladimir Kondratiev 187933c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 18802be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1881e0287c4aSVladimir Kondratiev return 0; 18822be7d22fSVladimir Kondratiev } 18832be7d22fSVladimir Kondratiev 188433c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1885097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1886097638a0SVladimir Kondratiev return 0; 1887097638a0SVladimir Kondratiev } 1888097638a0SVladimir Kondratiev 18897743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 18902be7d22fSVladimir Kondratiev 18910436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 18920436fd9aSVladimir Shulman 189341d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 189441d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 189541d6b093SVladimir Kondratiev 18962be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1897c236658fSVladimir Kondratiev int new_swtail; 1898c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1899c236658fSVladimir Kondratiev /** 1900c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 19013d4bde15SVladimir Kondratiev * last fragment. look for it. 19023d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1903c236658fSVladimir Kondratiev */ 1904c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1905c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1906c236658fSVladimir Kondratiev 1907c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 190833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1909c236658fSVladimir Kondratiev break; 1910c236658fSVladimir Kondratiev 1911c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1912c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 19134de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 19147e594444SVladimir Kondratiev u16 dmalen; 191576dfa4b7SVladimir Kondratiev struct sk_buff *skb; 191676dfa4b7SVladimir Kondratiev 191776dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 191876dfa4b7SVladimir Kondratiev skb = ctx->skb; 1919c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 19204de41befSVladimir Kondratiev 192168ada71eSVladimir Kondratiev *d = *_d; 19224de41befSVladimir Kondratiev 19237e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 192498658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 192598658095SVladimir Kondratiev d->dma.error); 19267743882dSVladimir Kondratiev wil_dbg_txrx(wil, 19275b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 19285b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 19295b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 19305b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 19312be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 19322be7d22fSVladimir Kondratiev 19332232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1934f88f113aSVladimir Kondratiev 19352be7d22fSVladimir Kondratiev if (skb) { 193633c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1937795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1938795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 193941d6b093SVladimir Kondratiev if (stats) { 194041d6b093SVladimir Kondratiev stats->tx_packets++; 1941c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 194241d6b093SVladimir Kondratiev } 1943795ce734SVladimir Kondratiev } else { 1944795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 194541d6b093SVladimir Kondratiev if (stats) 1946c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1947795ce734SVladimir Kondratiev } 1948713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 19492be7d22fSVladimir Kondratiev } 1950f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1951eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 1952eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 1953eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 1954eb26cff1SMaya Erez * is completed. 1955eb26cff1SMaya Erez */ 1956eb26cff1SMaya Erez wmb(); 1957c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 195803269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 195903269c65SVladimir Kondratiev * so hardware will not try to process this desc., 196003269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 196103269c65SVladimir Kondratiev */ 19622be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1963e0287c4aSVladimir Kondratiev done++; 19642be7d22fSVladimir Kondratiev } 1965c236658fSVladimir Kondratiev } 196667c3e1b4SVladimir Kondratiev 19670436fd9aSVladimir Shulman /* performance monitoring */ 19680436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 19690436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 19700436fd9aSVladimir Shulman used_new, used_before_complete)) { 19710436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 19720436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 19737c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 19747c0acf86SVladimir Kondratiev } 197567c3e1b4SVladimir Kondratiev 197655f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 197755f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 19782be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 197955f8f680SVladimir Kondratiev } 1980e0287c4aSVladimir Kondratiev 1981e0287c4aSVladimir Kondratiev return done; 19822be7d22fSVladimir Kondratiev } 1983