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)) { 3299165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom 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 877dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 878dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 879097638a0SVladimir Kondratiev txdata->enabled = 1; 880dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 881dc90506fSMaya Erez 882230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 8833a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 884097638a0SVladimir Kondratiev 8852be7d22fSVladimir Kondratiev return 0; 8862be7d22fSVladimir Kondratiev out_free: 887875e9439SMaya Erez spin_lock_bh(&txdata->lock); 888230d8442SVladimir Kondratiev txdata->dot1x_open = false; 889230d8442SVladimir Kondratiev txdata->enabled = 0; 890875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 8912be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8920916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 8930916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 8940916d9f2SMaya Erez 8952be7d22fSVladimir Kondratiev out: 8962be7d22fSVladimir Kondratiev 8972be7d22fSVladimir Kondratiev return rc; 8982be7d22fSVladimir Kondratiev } 8992be7d22fSVladimir Kondratiev 90041d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 90141d6b093SVladimir Kondratiev { 90241d6b093SVladimir Kondratiev int rc; 90341d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 90441d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 90541d6b093SVladimir Kondratiev .vring_cfg = { 90641d6b093SVladimir Kondratiev .tx_sw_ring = { 90741d6b093SVladimir Kondratiev .max_mpdu_size = 90841d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 90941d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 91041d6b093SVladimir Kondratiev }, 91141d6b093SVladimir Kondratiev .ringid = id, 91241d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 91341d6b093SVladimir Kondratiev }, 91441d6b093SVladimir Kondratiev }; 91541d6b093SVladimir Kondratiev struct { 916b874ddecSLior David struct wmi_cmd_hdr wmi; 91741d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 91841d6b093SVladimir Kondratiev } __packed reply; 91941d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 92041d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 92141d6b093SVladimir Kondratiev 92241d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 92341d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9249b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 92541d6b093SVladimir Kondratiev 92641d6b093SVladimir Kondratiev if (vring->va) { 92741d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 92841d6b093SVladimir Kondratiev rc = -EINVAL; 92941d6b093SVladimir Kondratiev goto out; 93041d6b093SVladimir Kondratiev } 93141d6b093SVladimir Kondratiev 932875e9439SMaya Erez wil_tx_data_init(txdata); 93341d6b093SVladimir Kondratiev vring->size = size; 93441d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 93541d6b093SVladimir Kondratiev if (rc) 93641d6b093SVladimir Kondratiev goto out; 93741d6b093SVladimir Kondratiev 93841d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 93941d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 94041d6b093SVladimir Kondratiev 94141d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 94241d6b093SVladimir Kondratiev 943230d8442SVladimir Kondratiev if (!wil->privacy) 944230d8442SVladimir Kondratiev txdata->dot1x_open = true; 94541d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 94641d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 94741d6b093SVladimir Kondratiev if (rc) 94841d6b093SVladimir Kondratiev goto out_free; 94941d6b093SVladimir Kondratiev 95041d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 95141d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 95241d6b093SVladimir Kondratiev reply.cmd.status); 95341d6b093SVladimir Kondratiev rc = -EINVAL; 95441d6b093SVladimir Kondratiev goto out_free; 95541d6b093SVladimir Kondratiev } 95641d6b093SVladimir Kondratiev 957dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 958dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 95941d6b093SVladimir Kondratiev txdata->enabled = 1; 960dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 96141d6b093SVladimir Kondratiev 96241d6b093SVladimir Kondratiev return 0; 96341d6b093SVladimir Kondratiev out_free: 964875e9439SMaya Erez spin_lock_bh(&txdata->lock); 965230d8442SVladimir Kondratiev txdata->enabled = 0; 966230d8442SVladimir Kondratiev txdata->dot1x_open = false; 967875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 96841d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 96941d6b093SVladimir Kondratiev out: 97041d6b093SVladimir Kondratiev 97141d6b093SVladimir Kondratiev return rc; 97241d6b093SVladimir Kondratiev } 97341d6b093SVladimir Kondratiev 9742be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 9752be7d22fSVladimir Kondratiev { 9762be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 9773a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9782be7d22fSVladimir Kondratiev 9799b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 980097638a0SVladimir Kondratiev 9812be7d22fSVladimir Kondratiev if (!vring->va) 9822be7d22fSVladimir Kondratiev return; 9832be7d22fSVladimir Kondratiev 9849cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 9859cf10d62SVladimir Kondratiev 9865933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 987230d8442SVladimir Kondratiev txdata->dot1x_open = false; 9885933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 9895933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 99034b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 99134b8886eSMaya Erez * not prevent the next NAPI run. 99234b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 99334b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 99434b8886eSMaya Erez * handle this vring 99534b8886eSMaya Erez */ 99634b8886eSMaya Erez wmb(); 997097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 9989419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 999097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1000097638a0SVladimir Kondratiev 10012be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 10022be7d22fSVladimir Kondratiev } 10032be7d22fSVladimir Kondratiev 100441d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 10052be7d22fSVladimir Kondratiev struct sk_buff *skb) 10062be7d22fSVladimir Kondratiev { 10073df2cd36SVladimir Kondratiev int i; 10083df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 10093df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 10102be7d22fSVladimir Kondratiev 10113df2cd36SVladimir Kondratiev if (cid < 0) 10123df2cd36SVladimir Kondratiev return NULL; 10133df2cd36SVladimir Kondratiev 10143df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 10153df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1016230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1017230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1018230d8442SVladimir Kondratiev continue; 10193df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 10203df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1021b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 10228fe59627SVladimir Kondratiev 10233df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 10243df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 1025b729aaf0SMaya Erez if (v->va && txdata->enabled) { 10262be7d22fSVladimir Kondratiev return v; 10273df2cd36SVladimir Kondratiev } else { 10283df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 10293df2cd36SVladimir Kondratiev return NULL; 10303df2cd36SVladimir Kondratiev } 10313df2cd36SVladimir Kondratiev } 10323df2cd36SVladimir Kondratiev } 10332be7d22fSVladimir Kondratiev 10342be7d22fSVladimir Kondratiev return NULL; 10352be7d22fSVladimir Kondratiev } 10362be7d22fSVladimir Kondratiev 1037fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1038fb3cac57SVladimir Kondratiev struct sk_buff *skb); 103954ed90a8SVladimir Kondratiev 104054ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 104154ed90a8SVladimir Kondratiev struct sk_buff *skb) 104254ed90a8SVladimir Kondratiev { 104354ed90a8SVladimir Kondratiev struct vring *v; 104454ed90a8SVladimir Kondratiev int i; 104554ed90a8SVladimir Kondratiev u8 cid; 1046b729aaf0SMaya Erez struct vring_tx_data *txdata; 104754ed90a8SVladimir Kondratiev 104854ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 104954ed90a8SVladimir Kondratiev * for the AP we connected to. 1050230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 105154ed90a8SVladimir Kondratiev */ 105254ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 105354ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1054b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1055b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 105654ed90a8SVladimir Kondratiev continue; 105754ed90a8SVladimir Kondratiev 105854ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 105941d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 106041d6b093SVladimir Kondratiev continue; 106141d6b093SVladimir Kondratiev 1062230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 106354ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1064230d8442SVladimir Kondratiev continue; 106554ed90a8SVladimir Kondratiev 106654ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 106754ed90a8SVladimir Kondratiev 106854ed90a8SVladimir Kondratiev return v; 106954ed90a8SVladimir Kondratiev } 107054ed90a8SVladimir Kondratiev 107154ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 107254ed90a8SVladimir Kondratiev 107354ed90a8SVladimir Kondratiev return NULL; 107454ed90a8SVladimir Kondratiev } 107554ed90a8SVladimir Kondratiev 107670812421SVladimir Kondratiev /* Use one of 2 strategies: 107770812421SVladimir Kondratiev * 107870812421SVladimir Kondratiev * 1. New (real broadcast): 107970812421SVladimir Kondratiev * use dedicated broadcast vring 108070812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 108170812421SVladimir Kondratiev * Find 1-st vring and return it; 108270812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 108370812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 108470812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 108570812421SVladimir Kondratiev * - for PBSS 108670812421SVladimir Kondratiev */ 108770812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1088fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1089fb3cac57SVladimir Kondratiev { 109041d6b093SVladimir Kondratiev struct vring *v; 1091b729aaf0SMaya Erez struct vring_tx_data *txdata; 109241d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1093fb3cac57SVladimir Kondratiev 109441d6b093SVladimir Kondratiev if (i < 0) 109541d6b093SVladimir Kondratiev return NULL; 1096fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1097b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1098b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1099fb3cac57SVladimir Kondratiev return NULL; 1100230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1101230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1102230d8442SVladimir Kondratiev return NULL; 1103fb3cac57SVladimir Kondratiev 1104fb3cac57SVladimir Kondratiev return v; 1105fb3cac57SVladimir Kondratiev } 1106fb3cac57SVladimir Kondratiev 110770812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 110870812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 110970812421SVladimir Kondratiev { 111070812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 111170812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 111270812421SVladimir Kondratiev 111370812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 111470812421SVladimir Kondratiev } 111570812421SVladimir Kondratiev 111670812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 111770812421SVladimir Kondratiev struct sk_buff *skb) 111870812421SVladimir Kondratiev { 111970812421SVladimir Kondratiev struct vring *v, *v2; 112070812421SVladimir Kondratiev struct sk_buff *skb2; 112170812421SVladimir Kondratiev int i; 112270812421SVladimir Kondratiev u8 cid; 112370812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 112470812421SVladimir Kondratiev char *src = eth->h_source; 1125b729aaf0SMaya Erez struct vring_tx_data *txdata; 112670812421SVladimir Kondratiev 112770812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 112870812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 112970812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1130b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1131b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 113270812421SVladimir Kondratiev continue; 113370812421SVladimir Kondratiev 113470812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 113570812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 113670812421SVladimir Kondratiev continue; 1137230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1138230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 113970812421SVladimir Kondratiev continue; 114070812421SVladimir Kondratiev 114170812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 114270812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 114370812421SVladimir Kondratiev continue; 114470812421SVladimir Kondratiev 114570812421SVladimir Kondratiev goto found; 114670812421SVladimir Kondratiev } 114770812421SVladimir Kondratiev 114870812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 114970812421SVladimir Kondratiev 115070812421SVladimir Kondratiev return NULL; 115170812421SVladimir Kondratiev 115270812421SVladimir Kondratiev found: 115370812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 115470812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 115570812421SVladimir Kondratiev 115670812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 115770812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 115870812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 115970812421SVladimir Kondratiev if (!v2->va) 116070812421SVladimir Kondratiev continue; 116170812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 116270812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116370812421SVladimir Kondratiev continue; 1164230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1165230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 116670812421SVladimir Kondratiev continue; 116770812421SVladimir Kondratiev 116870812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 116970812421SVladimir Kondratiev continue; 117070812421SVladimir Kondratiev 117170812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 117270812421SVladimir Kondratiev if (skb2) { 117370812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 117470812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 117570812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 117670812421SVladimir Kondratiev } else { 117770812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 117870812421SVladimir Kondratiev } 117970812421SVladimir Kondratiev } 118070812421SVladimir Kondratiev 118170812421SVladimir Kondratiev return v; 118270812421SVladimir Kondratiev } 118370812421SVladimir Kondratiev 118470812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 118570812421SVladimir Kondratiev struct sk_buff *skb) 118670812421SVladimir Kondratiev { 118770812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 118870812421SVladimir Kondratiev 118970812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 119070812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 119170812421SVladimir Kondratiev 119270812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 119370812421SVladimir Kondratiev } 119470812421SVladimir Kondratiev 119599b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 119699b55bd2SKirshenbaum Erez int vring_index) 11972be7d22fSVladimir Kondratiev { 119868ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 11992be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 12002be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 12012be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 12022be7d22fSVladimir Kondratiev d->dma.error = 0; 12032be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 12047e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 120599b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 12062be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 12072be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 12082be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 12092be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 12102be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 12112be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 12122be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 12132be7d22fSVladimir Kondratiev 12142be7d22fSVladimir Kondratiev return 0; 12152be7d22fSVladimir Kondratiev } 12162be7d22fSVladimir Kondratiev 1217c236658fSVladimir Kondratiev static inline 1218c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1219c236658fSVladimir Kondratiev { 12203d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1221c236658fSVladimir Kondratiev } 1222c236658fSVladimir Kondratiev 12233d4bde15SVladimir Kondratiev /** 12243d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12253d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12263d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12273d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 12283d4bde15SVladimir Kondratiev */ 12293d4bde15SVladimir Kondratiev 12303d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 12313d4bde15SVladimir Kondratiev struct sk_buff *skb, 12323d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 12333d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1234504937d4SKirshenbaum Erez { 12353d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 12363d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 12373d4bde15SVladimir Kondratiev 12383d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 12393d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 12403d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 12413d4bde15SVladimir Kondratiev 12423d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 12433d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 12443d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 12453d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 12463d4bde15SVladimir Kondratiev 12473d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 12483d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 12493d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 12503d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 12513d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 12523d4bde15SVladimir Kondratiev } 12533d4bde15SVladimir Kondratiev 12543d4bde15SVladimir Kondratiev /** 12553d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 12563d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12573d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 12583d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 12593d4bde15SVladimir Kondratiev * 12603d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 12613d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 12623d4bde15SVladimir Kondratiev */ 12633d4bde15SVladimir Kondratiev 12643d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 12653d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1266504937d4SKirshenbaum Erez int protocol; 1267504937d4SKirshenbaum Erez 1268504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1269504937d4SKirshenbaum Erez return 0; 1270504937d4SKirshenbaum Erez 1271df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1272df2d08eeSVladimir Kondratiev 1273504937d4SKirshenbaum Erez switch (skb->protocol) { 1274504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1275504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1276df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1277504937d4SKirshenbaum Erez break; 1278504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1279504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1280504937d4SKirshenbaum Erez break; 1281504937d4SKirshenbaum Erez default: 1282504937d4SKirshenbaum Erez return -EINVAL; 1283504937d4SKirshenbaum Erez } 1284504937d4SKirshenbaum Erez 1285504937d4SKirshenbaum Erez switch (protocol) { 1286504937d4SKirshenbaum Erez case IPPROTO_TCP: 1287504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1288504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1289504937d4SKirshenbaum Erez d->dma.d0 |= 1290504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1291504937d4SKirshenbaum Erez break; 1292504937d4SKirshenbaum Erez case IPPROTO_UDP: 1293504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1294504937d4SKirshenbaum Erez d->dma.d0 |= 1295504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1296504937d4SKirshenbaum Erez break; 1297504937d4SKirshenbaum Erez default: 1298504937d4SKirshenbaum Erez return -EINVAL; 1299504937d4SKirshenbaum Erez } 1300504937d4SKirshenbaum Erez 1301504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1302504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1303504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1304504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1305504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1306504937d4SKirshenbaum Erez 1307504937d4SKirshenbaum Erez return 0; 1308504937d4SKirshenbaum Erez } 1309504937d4SKirshenbaum Erez 13103d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13113d4bde15SVladimir Kondratiev { 13123d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13133d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13143d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13153d4bde15SVladimir Kondratiev } 13163d4bde15SVladimir Kondratiev 13173d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13183d4bde15SVladimir Kondratiev { 13193d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13203d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13213d4bde15SVladimir Kondratiev } 13223d4bde15SVladimir Kondratiev 13233d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 13243d4bde15SVladimir Kondratiev struct sk_buff *skb) 13253d4bde15SVladimir Kondratiev { 13263d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13273d4bde15SVladimir Kondratiev 13283d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 13293d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 13303d4bde15SVladimir Kondratiev *_first_desc = NULL; 13313d4bde15SVladimir Kondratiev 13323d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 13333d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 13343d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 13353d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 13363d4bde15SVladimir Kondratiev 13373d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 13383d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 13393d4bde15SVladimir Kondratiev 13403d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 13413d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 13423d4bde15SVladimir Kondratiev 13433d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 13443d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 13453d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 13463d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 13473d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 13483d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 13493d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 13503d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 13513d4bde15SVladimir Kondratiev uint i = swhead; 13523d4bde15SVladimir Kondratiev dma_addr_t pa; 13533d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 13543d4bde15SVladimir Kondratiev int rem_data = mss; 13553d4bde15SVladimir Kondratiev int lenmss; 13563d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 13573d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 13583d4bde15SVladimir Kondratiev bool is_ipv4; 13593d4bde15SVladimir Kondratiev int tcp_hdr_len; 13603d4bde15SVladimir Kondratiev int skb_net_hdr_len; 13613d4bde15SVladimir Kondratiev int gso_type; 1362e3d2ed94SHamad Kadmany int rc = -EINVAL; 13633d4bde15SVladimir Kondratiev 13643d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 13653d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 13663d4bde15SVladimir Kondratiev 13673d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 13683d4bde15SVladimir Kondratiev return -EINVAL; 13693d4bde15SVladimir Kondratiev 13703d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 13713d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 13723d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 13733d4bde15SVladimir Kondratiev * this is the initial check only. 13743d4bde15SVladimir Kondratiev */ 13753d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 13763d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 13773d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 13783d4bde15SVladimir Kondratiev vring_index, min_desc_required); 13793d4bde15SVladimir Kondratiev return -ENOMEM; 13803d4bde15SVladimir Kondratiev } 13813d4bde15SVladimir Kondratiev 13823d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 13833d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 13843d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 13853d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 13863d4bde15SVladimir Kondratiev 13873d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 13883d4bde15SVladimir Kondratiev switch (gso_type) { 13893d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 13903d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 13913d4bde15SVladimir Kondratiev * as required by the offloading doc 13923d4bde15SVladimir Kondratiev */ 13933d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 13943d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 13953d4bde15SVladimir Kondratiev is_ipv4 = true; 13963d4bde15SVladimir Kondratiev break; 13973d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 13983d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 13993d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14003d4bde15SVladimir Kondratiev is_ipv4 = false; 14013d4bde15SVladimir Kondratiev break; 14023d4bde15SVladimir Kondratiev default: 14033d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 14043d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14053d4bde15SVladimir Kondratiev */ 14063d4bde15SVladimir Kondratiev return -EINVAL; 14073d4bde15SVladimir Kondratiev } 14083d4bde15SVladimir Kondratiev 14093d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14103d4bde15SVladimir Kondratiev return -EINVAL; 14113d4bde15SVladimir Kondratiev 14123d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14133d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14143d4bde15SVladimir Kondratiev */ 14153d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14163d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14173d4bde15SVladimir Kondratiev 14183d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 14193d4bde15SVladimir Kondratiev 14203d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14213d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 14223d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 14233d4bde15SVladimir Kondratiev goto err_exit; 14243d4bde15SVladimir Kondratiev } 14253d4bde15SVladimir Kondratiev 14263d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 14273d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 14283d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 14293d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 14303d4bde15SVladimir Kondratiev 14313d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14323d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 14333d4bde15SVladimir Kondratiev 14343d4bde15SVladimir Kondratiev descs_used++; 14353d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 14363d4bde15SVladimir Kondratiev 14373d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 14383d4bde15SVladimir Kondratiev if (headlen) { 14393d4bde15SVladimir Kondratiev len = headlen; 14403d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 14413d4bde15SVladimir Kondratiev len); 14423d4bde15SVladimir Kondratiev } else { 14433d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 14443d4bde15SVladimir Kondratiev len = frag->size; 14453d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 14463d4bde15SVladimir Kondratiev } 14473d4bde15SVladimir Kondratiev 14483d4bde15SVladimir Kondratiev while (len) { 14493d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14503d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 14513d4bde15SVladimir Kondratiev len, rem_data, descs_used); 14523d4bde15SVladimir Kondratiev 14533d4bde15SVladimir Kondratiev if (descs_used == avail) { 1454e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1455e3d2ed94SHamad Kadmany rc = -ENOMEM; 1456e3d2ed94SHamad Kadmany goto mem_error; 14573d4bde15SVladimir Kondratiev } 14583d4bde15SVladimir Kondratiev 14593d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 14603d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14613d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 14623d4bde15SVladimir Kondratiev 14633d4bde15SVladimir Kondratiev if (!headlen) { 14643d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 14653d4bde15SVladimir Kondratiev frag->size - len, lenmss, 14663d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14673d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 14683d4bde15SVladimir Kondratiev } else { 14693d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 14703d4bde15SVladimir Kondratiev skb->data + 14713d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 14723d4bde15SVladimir Kondratiev lenmss, 14733d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14743d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14753d4bde15SVladimir Kondratiev headlen -= lenmss; 14763d4bde15SVladimir Kondratiev } 14773d4bde15SVladimir Kondratiev 1478e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1479e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1480e3d2ed94SHamad Kadmany goto mem_error; 1481e3d2ed94SHamad Kadmany } 14823d4bde15SVladimir Kondratiev 14833d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14843d4bde15SVladimir Kondratiev 14853d4bde15SVladimir Kondratiev if (!_first_desc) { 14863d4bde15SVladimir Kondratiev _first_desc = _desc; 14873d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 14883d4bde15SVladimir Kondratiev d = first_desc; 14893d4bde15SVladimir Kondratiev } else { 14903d4bde15SVladimir Kondratiev d = &desc_mem; 14913d4bde15SVladimir Kondratiev } 14923d4bde15SVladimir Kondratiev 14933d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 14943d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 14953d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 14963d4bde15SVladimir Kondratiev skb_net_hdr_len); 14973d4bde15SVladimir Kondratiev 14983d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 14993d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15003d4bde15SVladimir Kondratiev 15013d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15023d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 15033d4bde15SVladimir Kondratiev len -= lenmss; 15043d4bde15SVladimir Kondratiev rem_data -= lenmss; 15053d4bde15SVladimir Kondratiev 15063d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15073d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15083d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15093d4bde15SVladimir Kondratiev 15103d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15113d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15123d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15133d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15143d4bde15SVladimir Kondratiev * release 15153d4bde15SVladimir Kondratiev */ 15163d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15173d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15183d4bde15SVladimir Kondratiev sg_desc_cnt + 15193d4bde15SVladimir Kondratiev 1); 15203d4bde15SVladimir Kondratiev hdr_compensation_need = false; 15213d4bde15SVladimir Kondratiev } else { 15223d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15233d4bde15SVladimir Kondratiev sg_desc_cnt); 15243d4bde15SVladimir Kondratiev } 15253d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 15263d4bde15SVladimir Kondratiev 15273d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 15283d4bde15SVladimir Kondratiev 15293d4bde15SVladimir Kondratiev /* first descriptor may also be the last 15303d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 15313d4bde15SVladimir Kondratiev * it twice 15323d4bde15SVladimir Kondratiev */ 15333d4bde15SVladimir Kondratiev if (first_desc != d) 15343d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 15353d4bde15SVladimir Kondratiev 15363d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 15373d4bde15SVladimir Kondratiev * of this TS processing 15383d4bde15SVladimir Kondratiev */ 15393d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 15403d4bde15SVladimir Kondratiev *_desc = *d; 15413d4bde15SVladimir Kondratiev 15423d4bde15SVladimir Kondratiev rem_data = mss; 15433d4bde15SVladimir Kondratiev _first_desc = NULL; 15443d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 15453d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 15463d4bde15SVladimir Kondratiev *_desc = *d; 15473d4bde15SVladimir Kondratiev } 15483d4bde15SVladimir Kondratiev } 15493d4bde15SVladimir Kondratiev 15503d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 15513d4bde15SVladimir Kondratiev * in this case d pointer is invalid 15523d4bde15SVladimir Kondratiev */ 15533d4bde15SVladimir Kondratiev if (_first_desc == _desc) 15543d4bde15SVladimir Kondratiev d = first_desc; 15553d4bde15SVladimir Kondratiev 15563d4bde15SVladimir Kondratiev /* Last data descriptor */ 15573d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 15583d4bde15SVladimir Kondratiev *_desc = *d; 15593d4bde15SVladimir Kondratiev 15603d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 15613d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 15623d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 15633d4bde15SVladimir Kondratiev 15643d4bde15SVladimir Kondratiev /* hold reference to skb 15653d4bde15SVladimir Kondratiev * to prevent skb release before accounting 15663d4bde15SVladimir Kondratiev * in case of immediate "tx done" 15673d4bde15SVladimir Kondratiev */ 15683d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15693d4bde15SVladimir Kondratiev 15703d4bde15SVladimir Kondratiev /* performance monitoring */ 15713d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 15723d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 15733d4bde15SVladimir Kondratiev used, used + descs_used)) { 15743d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15753d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15763d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 15773d4bde15SVladimir Kondratiev } 15783d4bde15SVladimir Kondratiev 1579eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1580eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1581eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1582eb26cff1SMaya Erez * skb before it was completed. 1583eb26cff1SMaya Erez */ 1584eb26cff1SMaya Erez wmb(); 1585eb26cff1SMaya Erez 15863d4bde15SVladimir Kondratiev /* advance swhead */ 15873d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1588e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 15893d4bde15SVladimir Kondratiev 15903d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 15913d4bde15SVladimir Kondratiev * committing them to HW 15923d4bde15SVladimir Kondratiev */ 15933d4bde15SVladimir Kondratiev wmb(); 15943d4bde15SVladimir Kondratiev 1595b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 15963d4bde15SVladimir Kondratiev return 0; 15973d4bde15SVladimir Kondratiev 1598e3d2ed94SHamad Kadmany mem_error: 15993d4bde15SVladimir Kondratiev while (descs_used > 0) { 16003d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16013d4bde15SVladimir Kondratiev 1602a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 16033d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 16043d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 16053d4bde15SVladimir Kondratiev *d = *_desc; 16063d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16073d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16083d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 16093d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16103d4bde15SVladimir Kondratiev descs_used--; 16113d4bde15SVladimir Kondratiev } 16123d4bde15SVladimir Kondratiev err_exit: 1613e3d2ed94SHamad Kadmany return rc; 16143d4bde15SVladimir Kondratiev } 16153d4bde15SVladimir Kondratiev 16165933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16172be7d22fSVladimir Kondratiev struct sk_buff *skb) 16182be7d22fSVladimir Kondratiev { 16192be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 162068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 162168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 16222be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 16232be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 16242be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1625504937d4SKirshenbaum Erez uint f = 0; 16262be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16277c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16282be7d22fSVladimir Kondratiev uint i = swhead; 16292be7d22fSVladimir Kondratiev dma_addr_t pa; 16300436fd9aSVladimir Shulman int used; 163141d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 163241d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 16332be7d22fSVladimir Kondratiev 16343d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 16353d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 16362be7d22fSVladimir Kondratiev 16375933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 16385933a06dSVladimir Kondratiev return -EINVAL; 16395933a06dSVladimir Kondratiev 164033c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 164170801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 16425b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 16435b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 16442be7d22fSVladimir Kondratiev return -ENOMEM; 16452be7d22fSVladimir Kondratiev } 16468fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16472be7d22fSVladimir Kondratiev 16488fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 16492be7d22fSVladimir Kondratiev 16505b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 16515b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 16527743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 16532be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 16542be7d22fSVladimir Kondratiev 16552be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 16562be7d22fSVladimir Kondratiev return -EINVAL; 16572232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16582be7d22fSVladimir Kondratiev /* 1-st segment */ 165941d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 166041d6b093SVladimir Kondratiev if (unlikely(mcast)) { 166141d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1662230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 166341d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 166441d6b093SVladimir Kondratiev } 1665504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 16663d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 16675b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1668504937d4SKirshenbaum Erez vring_index); 1669504937d4SKirshenbaum Erez goto dma_error; 1670504937d4SKirshenbaum Erez } 1671504937d4SKirshenbaum Erez 1672c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 16733d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 167468ada71eSVladimir Kondratiev 16752be7d22fSVladimir Kondratiev /* middle segments */ 1676504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 16772be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 16782be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 16792be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 16808fe59627SVladimir Kondratiev 1681e59d16c0SVladimir Kondratiev *_d = *d; 16825b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 16835b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 16845b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 16852be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 16868fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16872be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 16882be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1689e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1690e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1691e3d2ed94SHamad Kadmany vring_index); 16922be7d22fSVladimir Kondratiev goto dma_error; 1693e3d2ed94SHamad Kadmany } 16942232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 169599b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1696c236658fSVladimir Kondratiev /* no need to check return code - 1697c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1698c236658fSVladimir Kondratiev * it will succeed here too 1699c236658fSVladimir Kondratiev */ 17003d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17012be7d22fSVladimir Kondratiev } 17022be7d22fSVladimir Kondratiev /* for the last seg only */ 17032be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1704668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17052be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 170668ada71eSVladimir Kondratiev *_d = *d; 17075b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17085b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17095b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17102be7d22fSVladimir Kondratiev 17116cdadd4dSVladimir Kondratiev /* hold reference to skb 17126cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17136cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17146cdadd4dSVladimir Kondratiev */ 17156cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17166cdadd4dSVladimir Kondratiev 17170436fd9aSVladimir Shulman /* performance monitoring */ 17180436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 17190436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 17200436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 17217c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17220436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17230436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 17240436fd9aSVladimir Shulman } 17257c0acf86SVladimir Kondratiev 1726eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1727eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1728eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1729eb26cff1SMaya Erez * skb before it was completed. 1730eb26cff1SMaya Erez */ 1731eb26cff1SMaya Erez wmb(); 1732eb26cff1SMaya Erez 17332be7d22fSVladimir Kondratiev /* advance swhead */ 17342be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 17355b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 17365b29c573SVladimir Kondratiev vring->swhead); 173798658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 17383d4bde15SVladimir Kondratiev 17393d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17403d4bde15SVladimir Kondratiev * committing them to HW 17413d4bde15SVladimir Kondratiev */ 17423d4bde15SVladimir Kondratiev wmb(); 17433d4bde15SVladimir Kondratiev 1744b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17452be7d22fSVladimir Kondratiev 17462be7d22fSVladimir Kondratiev return 0; 17472be7d22fSVladimir Kondratiev dma_error: 17482be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1749c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1750c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1751c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 17527e594444SVladimir Kondratiev 17532be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1754c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 17558fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 175668ada71eSVladimir Kondratiev *d = *_d; 175768ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 17582232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1759f88f113aSVladimir Kondratiev 1760f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17612be7d22fSVladimir Kondratiev } 17622be7d22fSVladimir Kondratiev 17632be7d22fSVladimir Kondratiev return -EINVAL; 17642be7d22fSVladimir Kondratiev } 17652be7d22fSVladimir Kondratiev 17665933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17675933a06dSVladimir Kondratiev struct sk_buff *skb) 17685933a06dSVladimir Kondratiev { 17695933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17705933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17715933a06dSVladimir Kondratiev int rc; 17725933a06dSVladimir Kondratiev 17735933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 17743d4bde15SVladimir Kondratiev 17753d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 17763d4bde15SVladimir Kondratiev (wil, vring, skb); 17773d4bde15SVladimir Kondratiev 17785933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 17793d4bde15SVladimir Kondratiev 17805933a06dSVladimir Kondratiev return rc; 17815933a06dSVladimir Kondratiev } 17825933a06dSVladimir Kondratiev 17832be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 17842be7d22fSVladimir Kondratiev { 17852be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 17863df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 178741d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 17882be7d22fSVladimir Kondratiev struct vring *vring; 1789aa27deaaSVladimir Kondratiev static bool pr_once_fw; 17902be7d22fSVladimir Kondratiev int rc; 17912be7d22fSVladimir Kondratiev 17927743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 179333c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1794aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 17952be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1796aa27deaaSVladimir Kondratiev pr_once_fw = true; 1797aa27deaaSVladimir Kondratiev } 17982be7d22fSVladimir Kondratiev goto drop; 17992be7d22fSVladimir Kondratiev } 180033c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1801d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 18022be7d22fSVladimir Kondratiev goto drop; 18032be7d22fSVladimir Kondratiev } 180433c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 18052be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 18062be7d22fSVladimir Kondratiev goto drop; 18072be7d22fSVladimir Kondratiev } 1808aa27deaaSVladimir Kondratiev pr_once_fw = false; 1809d58db4e4SVladimir Kondratiev 18102be7d22fSVladimir Kondratiev /* find vring */ 181154ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 181254ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 181354ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 181454ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 181541d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 181641d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 181754ed90a8SVladimir Kondratiev } 181833c477fdSVladimir Kondratiev if (unlikely(!vring)) { 18195aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 18202be7d22fSVladimir Kondratiev goto drop; 18212be7d22fSVladimir Kondratiev } 18222be7d22fSVladimir Kondratiev /* set up vring entry */ 18232be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1824d58db4e4SVladimir Kondratiev 18252232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 182633c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 18272232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 182855f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 182955f8f680SVladimir Kondratiev } 18302232abd5SVladimir Kondratiev 18312be7d22fSVladimir Kondratiev switch (rc) { 18322be7d22fSVladimir Kondratiev case 0: 1833795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 18342be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 18352be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 18362be7d22fSVladimir Kondratiev case -ENOMEM: 18372be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 18382be7d22fSVladimir Kondratiev default: 1839afda8bb5SVladimir Kondratiev break; /* goto drop; */ 18402be7d22fSVladimir Kondratiev } 18412be7d22fSVladimir Kondratiev drop: 18422be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 18432be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 18442be7d22fSVladimir Kondratiev 18452be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 18462be7d22fSVladimir Kondratiev } 18472be7d22fSVladimir Kondratiev 1848713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1849713c8a29SVladimir Kondratiev { 1850713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1851713c8a29SVladimir Kondratiev 1852713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1853713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1854713c8a29SVladimir Kondratiev } 1855713c8a29SVladimir Kondratiev 1856713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1857713c8a29SVladimir Kondratiev { 1858713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1859713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1860713c8a29SVladimir Kondratiev else 1861713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1862713c8a29SVladimir Kondratiev } 1863713c8a29SVladimir Kondratiev 18642be7d22fSVladimir Kondratiev /** 18652be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 18662be7d22fSVladimir Kondratiev * 1867e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1868e0287c4aSVladimir Kondratiev * 18692be7d22fSVladimir Kondratiev * Safe to call from IRQ 18702be7d22fSVladimir Kondratiev */ 1871e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 18722be7d22fSVladimir Kondratiev { 1873795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 18742be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 18752be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1876097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1877e0287c4aSVladimir Kondratiev int done = 0; 1878c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 187941d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1880c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 18810436fd9aSVladimir Shulman int used_before_complete; 18820436fd9aSVladimir Shulman int used_new; 18832be7d22fSVladimir Kondratiev 188433c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 18852be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1886e0287c4aSVladimir Kondratiev return 0; 18872be7d22fSVladimir Kondratiev } 18882be7d22fSVladimir Kondratiev 188933c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1890097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1891097638a0SVladimir Kondratiev return 0; 1892097638a0SVladimir Kondratiev } 1893097638a0SVladimir Kondratiev 18947743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 18952be7d22fSVladimir Kondratiev 18960436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 18970436fd9aSVladimir Shulman 189841d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 189941d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 190041d6b093SVladimir Kondratiev 19012be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1902c236658fSVladimir Kondratiev int new_swtail; 1903c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1904c236658fSVladimir Kondratiev /** 1905c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 19063d4bde15SVladimir Kondratiev * last fragment. look for it. 19073d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1908c236658fSVladimir Kondratiev */ 1909c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1910c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1911c236658fSVladimir Kondratiev 1912c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 191333c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1914c236658fSVladimir Kondratiev break; 1915c236658fSVladimir Kondratiev 1916c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1917c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 19184de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 19197e594444SVladimir Kondratiev u16 dmalen; 192076dfa4b7SVladimir Kondratiev struct sk_buff *skb; 192176dfa4b7SVladimir Kondratiev 192276dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 192376dfa4b7SVladimir Kondratiev skb = ctx->skb; 1924c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 19254de41befSVladimir Kondratiev 192668ada71eSVladimir Kondratiev *d = *_d; 19274de41befSVladimir Kondratiev 19287e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 192998658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 193098658095SVladimir Kondratiev d->dma.error); 19317743882dSVladimir Kondratiev wil_dbg_txrx(wil, 19325b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 19335b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 19345b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 19355b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 19362be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 19372be7d22fSVladimir Kondratiev 19382232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1939f88f113aSVladimir Kondratiev 19402be7d22fSVladimir Kondratiev if (skb) { 194133c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1942795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1943795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 194441d6b093SVladimir Kondratiev if (stats) { 194541d6b093SVladimir Kondratiev stats->tx_packets++; 1946c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 194741d6b093SVladimir Kondratiev } 1948795ce734SVladimir Kondratiev } else { 1949795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 195041d6b093SVladimir Kondratiev if (stats) 1951c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1952795ce734SVladimir Kondratiev } 1953713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 19542be7d22fSVladimir Kondratiev } 1955f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1956eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 1957eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 1958eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 1959eb26cff1SMaya Erez * is completed. 1960eb26cff1SMaya Erez */ 1961eb26cff1SMaya Erez wmb(); 1962c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 196303269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 196403269c65SVladimir Kondratiev * so hardware will not try to process this desc., 196503269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 196603269c65SVladimir Kondratiev */ 19672be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1968e0287c4aSVladimir Kondratiev done++; 19692be7d22fSVladimir Kondratiev } 1970c236658fSVladimir Kondratiev } 197167c3e1b4SVladimir Kondratiev 19720436fd9aSVladimir Shulman /* performance monitoring */ 19730436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 19740436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 19750436fd9aSVladimir Shulman used_new, used_before_complete)) { 19760436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 19770436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 19787c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 19797c0acf86SVladimir Kondratiev } 198067c3e1b4SVladimir Kondratiev 198155f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 198255f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 19832be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 198455f8f680SVladimir Kondratiev } 1985e0287c4aSVladimir Kondratiev 1986e0287c4aSVladimir Kondratiev return done; 19872be7d22fSVladimir Kondratiev } 1988