12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 32be7d22fSVladimir Kondratiev * 42be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 52be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 62be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 72be7d22fSVladimir Kondratiev * 82be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 92be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 102be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 112be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 122be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 132be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 142be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 152be7d22fSVladimir Kondratiev */ 162be7d22fSVladimir Kondratiev 172be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 182be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 192be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 202be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 21504937d4SKirshenbaum Erez #include <linux/ip.h> 22504937d4SKirshenbaum Erez #include <linux/ipv6.h> 23504937d4SKirshenbaum Erez #include <net/ipv6.h> 240786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 252be7d22fSVladimir Kondratiev 262be7d22fSVladimir Kondratiev #include "wil6210.h" 272be7d22fSVladimir Kondratiev #include "wmi.h" 282be7d22fSVladimir Kondratiev #include "txrx.h" 2998658095SVladimir Kondratiev #include "trace.h" 302be7d22fSVladimir Kondratiev 312be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3278484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 332be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 342be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 352be7d22fSVladimir Kondratiev 36c406ea7cSVladimir Kondratiev bool rx_align_2; 3778484c44SMaya Erez module_param(rx_align_2, bool, 0444); 38c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 39c406ea7cSVladimir Kondratiev 40c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 41c406ea7cSVladimir Kondratiev { 42c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 43c406ea7cSVladimir Kondratiev } 44c406ea7cSVladimir Kondratiev 452be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 462be7d22fSVladimir Kondratiev { 472be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 482be7d22fSVladimir Kondratiev } 492be7d22fSVladimir Kondratiev 502be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 512be7d22fSVladimir Kondratiev { 522be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 532be7d22fSVladimir Kondratiev } 542be7d22fSVladimir Kondratiev 552be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 562be7d22fSVladimir Kondratiev { 572be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 582be7d22fSVladimir Kondratiev } 592be7d22fSVladimir Kondratiev 602be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 612be7d22fSVladimir Kondratiev { 622be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 632be7d22fSVladimir Kondratiev } 648fe59627SVladimir Kondratiev 650436fd9aSVladimir Shulman /* Used space in Tx Vring */ 660436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 672be7d22fSVladimir Kondratiev { 682be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 692be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 700436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 712be7d22fSVladimir Kondratiev } 722be7d22fSVladimir Kondratiev 730436fd9aSVladimir Shulman /* Available space in Tx Vring */ 740436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 750436fd9aSVladimir Shulman { 760436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 770436fd9aSVladimir Shulman } 780436fd9aSVladimir Shulman 790436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 805bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 815bb6423eSVladimir Kondratiev { 825bb6423eSVladimir Kondratiev return vring->size/8; 835bb6423eSVladimir Kondratiev } 845bb6423eSVladimir Kondratiev 850436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 865bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 875bb6423eSVladimir Kondratiev { 885bb6423eSVladimir Kondratiev return vring->size/4; 895bb6423eSVladimir Kondratiev } 905bb6423eSVladimir Kondratiev 91f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 92f9e3033fSDedy Lansky static inline int wil_vring_avail_low(struct vring *vring) 93f9e3033fSDedy Lansky { 94f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring); 95f9e3033fSDedy Lansky } 96f9e3033fSDedy Lansky 97f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 98f9e3033fSDedy Lansky static inline int wil_vring_avail_high(struct vring *vring) 99f9e3033fSDedy Lansky { 100f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring); 101f9e3033fSDedy Lansky } 102f9e3033fSDedy Lansky 1030436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 1040436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 1050436fd9aSVladimir Shulman { 1060436fd9aSVladimir Shulman return val >= min && val < max; 1070436fd9aSVladimir Shulman } 1080436fd9aSVladimir Shulman 1092be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 1102be7d22fSVladimir Kondratiev { 1112be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1122be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1132be7d22fSVladimir Kondratiev uint i; 1142be7d22fSVladimir Kondratiev 115af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1169cf10d62SVladimir Kondratiev 1172be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1182be7d22fSVladimir Kondratiev 1192be7d22fSVladimir Kondratiev vring->swhead = 0; 1202be7d22fSVladimir Kondratiev vring->swtail = 0; 121f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1222be7d22fSVladimir Kondratiev if (!vring->ctx) { 1232be7d22fSVladimir Kondratiev vring->va = NULL; 1242be7d22fSVladimir Kondratiev return -ENOMEM; 1252be7d22fSVladimir Kondratiev } 126f2de576dSHamad Kadmany 1270436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 128f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 129f2de576dSHamad Kadmany * 130f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 131f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 132f2de576dSHamad Kadmany * if we are using 48 bit addresses switch to 32 bit allocation 133f2de576dSHamad Kadmany * before allocating vring memory. 134f2de576dSHamad Kadmany * 135f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 136f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 137f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1382be7d22fSVladimir Kondratiev */ 139f2de576dSHamad Kadmany if (wil->use_extended_dma_addr) 140f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 141f2de576dSHamad Kadmany 1422be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1432be7d22fSVladimir Kondratiev if (!vring->va) { 1442be7d22fSVladimir Kondratiev kfree(vring->ctx); 1452be7d22fSVladimir Kondratiev vring->ctx = NULL; 1462be7d22fSVladimir Kondratiev return -ENOMEM; 1472be7d22fSVladimir Kondratiev } 148f2de576dSHamad Kadmany 149f2de576dSHamad Kadmany if (wil->use_extended_dma_addr) 150f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); 151f2de576dSHamad Kadmany 1522be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1532be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1542be7d22fSVladimir Kondratiev * we can use any 1552be7d22fSVladimir Kondratiev */ 1562be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 1578fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 1588fe59627SVladimir Kondratiev 15968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1602be7d22fSVladimir Kondratiev } 1612be7d22fSVladimir Kondratiev 16239c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 16339c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1642be7d22fSVladimir Kondratiev 1652be7d22fSVladimir Kondratiev return 0; 1662be7d22fSVladimir Kondratiev } 1672be7d22fSVladimir Kondratiev 1682232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1692232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1702232abd5SVladimir Kondratiev { 1712232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1722232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1738fe59627SVladimir Kondratiev 1742232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1752232abd5SVladimir Kondratiev case wil_mapped_as_single: 1762232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1772232abd5SVladimir Kondratiev break; 1782232abd5SVladimir Kondratiev case wil_mapped_as_page: 1792232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1802232abd5SVladimir Kondratiev break; 1812232abd5SVladimir Kondratiev default: 1822232abd5SVladimir Kondratiev break; 1832232abd5SVladimir Kondratiev } 1842232abd5SVladimir Kondratiev } 1852232abd5SVladimir Kondratiev 1862be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 1872be7d22fSVladimir Kondratiev int tx) 1882be7d22fSVladimir Kondratiev { 1892be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1902be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1912be7d22fSVladimir Kondratiev 1929b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 193ef77285fSVladimir Kondratiev if (tx) { 194ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 195ef77285fSVladimir Kondratiev 196ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 197ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 198ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 199ef77285fSVladimir Kondratiev } else { 200ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 201ef77285fSVladimir Kondratiev vring->size, vring->va, 202ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 203ef77285fSVladimir Kondratiev } 204ef77285fSVladimir Kondratiev 2052be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 20668ada71eSVladimir Kondratiev dma_addr_t pa; 2077e594444SVladimir Kondratiev u16 dmalen; 208f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 20968ada71eSVladimir Kondratiev 2102be7d22fSVladimir Kondratiev if (tx) { 21168ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21268ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 2132be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 21468ada71eSVladimir Kondratiev 215f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 21634b8886eSMaya Erez if (!ctx) { 21734b8886eSMaya Erez wil_dbg_txrx(wil, 21834b8886eSMaya Erez "ctx(%d) was already completed\n", 21934b8886eSMaya Erez vring->swtail); 22034b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 22134b8886eSMaya Erez continue; 22234b8886eSMaya Erez } 22368ada71eSVladimir Kondratiev *d = *_d; 2242232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 225f88f113aSVladimir Kondratiev if (ctx->skb) 226f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 2272be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2282be7d22fSVladimir Kondratiev } else { /* rx */ 22968ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 23068ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2314d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 23268ada71eSVladimir Kondratiev 233f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 23468ada71eSVladimir Kondratiev *d = *_d; 23568ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2367e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2377e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 238f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2392be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2402be7d22fSVladimir Kondratiev } 2412be7d22fSVladimir Kondratiev } 2422be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2432be7d22fSVladimir Kondratiev kfree(vring->ctx); 2442be7d22fSVladimir Kondratiev vring->pa = 0; 2452be7d22fSVladimir Kondratiev vring->va = NULL; 2462be7d22fSVladimir Kondratiev vring->ctx = NULL; 2472be7d22fSVladimir Kondratiev } 2482be7d22fSVladimir Kondratiev 2492be7d22fSVladimir Kondratiev /** 2502be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2512be7d22fSVladimir Kondratiev * 2522be7d22fSVladimir Kondratiev * Safe to call from IRQ 2532be7d22fSVladimir Kondratiev */ 2542be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 2552be7d22fSVladimir Kondratiev u32 i, int headroom) 2562be7d22fSVladimir Kondratiev { 2572be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 258c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen(); 25968ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 2608fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 2612be7d22fSVladimir Kondratiev dma_addr_t pa; 2622be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2638fe59627SVladimir Kondratiev 2642be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2652be7d22fSVladimir Kondratiev return -ENOMEM; 2662be7d22fSVladimir Kondratiev 2672be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2682be7d22fSVladimir Kondratiev skb_put(skb, sz); 2692be7d22fSVladimir Kondratiev 2702be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2712be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2722be7d22fSVladimir Kondratiev kfree_skb(skb); 2732be7d22fSVladimir Kondratiev return -ENOMEM; 2742be7d22fSVladimir Kondratiev } 2752be7d22fSVladimir Kondratiev 27648c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 27768ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2782be7d22fSVladimir Kondratiev /* ip_length don't care */ 2792be7d22fSVladimir Kondratiev /* b11 don't care */ 2802be7d22fSVladimir Kondratiev /* error don't care */ 2812be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2827e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 28368ada71eSVladimir Kondratiev *_d = *d; 284f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2852be7d22fSVladimir Kondratiev 2862be7d22fSVladimir Kondratiev return 0; 2872be7d22fSVladimir Kondratiev } 2882be7d22fSVladimir Kondratiev 2892be7d22fSVladimir Kondratiev /** 2902be7d22fSVladimir Kondratiev * Adds radiotap header 2912be7d22fSVladimir Kondratiev * 2922be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 2932be7d22fSVladimir Kondratiev * 2942be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 2952be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 2962be7d22fSVladimir Kondratiev * - Phy info 2972be7d22fSVladimir Kondratiev */ 2982be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 29933e61169SVladimir Kondratiev struct sk_buff *skb) 3002be7d22fSVladimir Kondratiev { 3012be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 3022be7d22fSVladimir Kondratiev struct wil6210_rtap { 3032be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3042be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3052be7d22fSVladimir Kondratiev /* flags */ 3062be7d22fSVladimir Kondratiev u8 flags; 3072be7d22fSVladimir Kondratiev /* channel */ 3082be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3092be7d22fSVladimir Kondratiev __le16 chnl_flags; 3102be7d22fSVladimir Kondratiev /* MCS */ 3112be7d22fSVladimir Kondratiev u8 mcs_present; 3122be7d22fSVladimir Kondratiev u8 mcs_flags; 3132be7d22fSVladimir Kondratiev u8 mcs_index; 3142be7d22fSVladimir Kondratiev } __packed; 3152be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3162be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3172be7d22fSVladimir Kondratiev /* vendor */ 3182be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3192be7d22fSVladimir Kondratiev u8 vendor_ns; 3202be7d22fSVladimir Kondratiev __le16 vendor_skip; 3212be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3222be7d22fSVladimir Kondratiev } __packed; 32333e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3242be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3252be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3262be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3272be7d22fSVladimir Kondratiev static char phy_data[128]; 3282be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 3292be7d22fSVladimir Kondratiev 3302be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3312be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3322be7d22fSVladimir Kondratiev /* calculate additional length */ 3332be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3342be7d22fSVladimir Kondratiev /** 3352be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3362be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3372be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3382be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3392be7d22fSVladimir Kondratiev */ 3402be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3412be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3428fe59627SVladimir Kondratiev 3432be7d22fSVladimir Kondratiev if (len > 8) { 3442be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3452be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3468fe59627SVladimir Kondratiev 3472be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3482be7d22fSVladimir Kondratiev phy_length = len - 8; 3492be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3502be7d22fSVladimir Kondratiev } 3512be7d22fSVladimir Kondratiev } 3522be7d22fSVladimir Kondratiev } 3532be7d22fSVladimir Kondratiev rtap_len += phy_length; 3542be7d22fSVladimir Kondratiev } 3552be7d22fSVladimir Kondratiev 3562be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3572be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3589165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3592be7d22fSVladimir Kondratiev return; 3602be7d22fSVladimir Kondratiev } 3612be7d22fSVladimir Kondratiev 3622be7d22fSVladimir Kondratiev rtap_vendor = (void *)skb_push(skb, rtap_len); 3632be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3642be7d22fSVladimir Kondratiev 3652be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3662be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3672be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3682be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3692be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3702be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3712be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3722be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3732be7d22fSVladimir Kondratiev 3742be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3752be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3762be7d22fSVladimir Kondratiev 3772be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3782be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3792be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3802be7d22fSVladimir Kondratiev 3812be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3822be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3832be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3842be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3852be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3862be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3872be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 3882be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 3892be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 3902be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 3912be7d22fSVladimir Kondratiev phy_length); 3922be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 3932be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 3942be7d22fSVladimir Kondratiev phy_length); 3952be7d22fSVladimir Kondratiev } 3962be7d22fSVladimir Kondratiev } 3972be7d22fSVladimir Kondratiev 398a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 399a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 400a8313341SVladimir Kondratiev { 401a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 402a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 403a8313341SVladimir Kondratiev } 404a8313341SVladimir Kondratiev 4052be7d22fSVladimir Kondratiev /** 4062be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4072be7d22fSVladimir Kondratiev * 40833e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 40933e61169SVladimir Kondratiev * 4102be7d22fSVladimir Kondratiev * Safe to call from IRQ 4112be7d22fSVladimir Kondratiev */ 4122be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 4132be7d22fSVladimir Kondratiev struct vring *vring) 4142be7d22fSVladimir Kondratiev { 4152be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4162be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 41768ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 41868ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4192be7d22fSVladimir Kondratiev struct sk_buff *skb; 4202be7d22fSVladimir Kondratiev dma_addr_t pa; 421c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 422c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + snaplen; 4237e594444SVladimir Kondratiev u16 dmalen; 4242be7d22fSVladimir Kondratiev u8 ftype; 425c8b78b5fSVladimir Kondratiev int cid; 4263b282bc6SVladimir Kondratiev int i; 427c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 428c8b78b5fSVladimir Kondratiev 42933e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 43033e61169SVladimir Kondratiev 4313b282bc6SVladimir Kondratiev again: 43233c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4332be7d22fSVladimir Kondratiev return NULL; 4342be7d22fSVladimir Kondratiev 4353b282bc6SVladimir Kondratiev i = (int)vring->swhead; 436148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 43733c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4382be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4392be7d22fSVladimir Kondratiev return NULL; 4402be7d22fSVladimir Kondratiev } 4412be7d22fSVladimir Kondratiev 442148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 443148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 444148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 445148416a9SVladimir Kondratiev if (!skb) { 446148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4473b282bc6SVladimir Kondratiev goto again; 448148416a9SVladimir Kondratiev } 44968ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 45068ada71eSVladimir Kondratiev *d = *_d; 45168ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 45268ada71eSVladimir Kondratiev 45368ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 45468ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 45568ada71eSVladimir Kondratiev 456148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 457148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 458a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 45968ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 46068ada71eSVladimir Kondratiev 4613b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4623b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4633b282bc6SVladimir Kondratiev 46433c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 465e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4663b282bc6SVladimir Kondratiev stats->rx_large_frame++; 467110dea00SWei Yongjun kfree_skb(skb); 4683b282bc6SVladimir Kondratiev goto again; 469e270045bSVladimir Kondratiev } 4707e594444SVladimir Kondratiev skb_trim(skb, dmalen); 47133e61169SVladimir Kondratiev 4721cbbcb08SVladimir Kondratiev prefetch(skb->data); 4731cbbcb08SVladimir Kondratiev 474c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 475c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 476c0d37713SVladimir Kondratiev 477c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 478c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 479c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4802be7d22fSVladimir Kondratiev 4812be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4822be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 48333e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4842be7d22fSVladimir Kondratiev 4852be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4862be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4872be7d22fSVladimir Kondratiev return skb; 488a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4892be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4902be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4912be7d22fSVladimir Kondratiev */ 49268ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 49333c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 494a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 495a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 496a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 497a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 498a8313341SVladimir Kondratiev 499a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 500a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 501a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5023b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 503a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 504a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 505a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 506a8313341SVladimir Kondratiev mid, cid, tid, seq); 507a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 508a8313341SVladimir Kondratiev } else { 509a8313341SVladimir Kondratiev /* print again all info. One can enable only this 510a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 511a8313341SVladimir Kondratiev */ 512a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 513a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 514a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 515a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 516a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 517a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 518a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 519a8313341SVladimir Kondratiev } 5202be7d22fSVladimir Kondratiev kfree_skb(skb); 5213b282bc6SVladimir Kondratiev goto again; 5222be7d22fSVladimir Kondratiev } 5232be7d22fSVladimir Kondratiev 524c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5252be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5263b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5272be7d22fSVladimir Kondratiev kfree_skb(skb); 5283b282bc6SVladimir Kondratiev goto again; 5292be7d22fSVladimir Kondratiev } 5302be7d22fSVladimir Kondratiev 531504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 532504937d4SKirshenbaum Erez * and in case of error drop the packet 533504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 534504937d4SKirshenbaum Erez */ 53533c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 536504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 53733c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 538504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5394a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5404a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5414a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5424a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5434a68ab10SVladimir Kondratiev */ 544504937d4SKirshenbaum Erez } 545504937d4SKirshenbaum Erez 546c406ea7cSVladimir Kondratiev if (snaplen) { 547c406ea7cSVladimir Kondratiev /* Packet layout 548c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 549c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 550c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 551c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 552c406ea7cSVladimir Kondratiev */ 553c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 554c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 555c406ea7cSVladimir Kondratiev } 556c406ea7cSVladimir Kondratiev 5572be7d22fSVladimir Kondratiev return skb; 5582be7d22fSVladimir Kondratiev } 5592be7d22fSVladimir Kondratiev 5602be7d22fSVladimir Kondratiev /** 5612be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5622be7d22fSVladimir Kondratiev * buffers posted at @swtail 5632be7d22fSVladimir Kondratiev */ 5642be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5652be7d22fSVladimir Kondratiev { 5662be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 5672be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 5682be7d22fSVladimir Kondratiev u32 next_tail; 5692be7d22fSVladimir Kondratiev int rc = 0; 5702be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5712be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5722be7d22fSVladimir Kondratiev 5732be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5742be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5752be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5762be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 57733c477fdSVladimir Kondratiev if (unlikely(rc)) { 5782be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5792be7d22fSVladimir Kondratiev rc, v->swtail); 5802be7d22fSVladimir Kondratiev break; 5812be7d22fSVladimir Kondratiev } 5822be7d22fSVladimir Kondratiev } 583ab6d7cc3SMaya Erez 584ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 585ab6d7cc3SMaya Erez * committing them to HW 586ab6d7cc3SMaya Erez */ 587ab6d7cc3SMaya Erez wmb(); 588ab6d7cc3SMaya Erez 589b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5902be7d22fSVladimir Kondratiev 5912be7d22fSVladimir Kondratiev return rc; 5922be7d22fSVladimir Kondratiev } 5932be7d22fSVladimir Kondratiev 59458527421SVladimir Kondratiev /** 59558527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 59658527421SVladimir Kondratiev * @cs: One area of memory 59758527421SVladimir Kondratiev * @ct: Another area of memory 59858527421SVladimir Kondratiev * @count: The size of the area. 59958527421SVladimir Kondratiev * 60058527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 60158527421SVladimir Kondratiev * with minimal modifications 60258527421SVladimir Kondratiev */ 60358527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 60458527421SVladimir Kondratiev { 60558527421SVladimir Kondratiev const unsigned char *su1, *su2; 60658527421SVladimir Kondratiev int res = 0; 60758527421SVladimir Kondratiev 60858527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 60958527421SVladimir Kondratiev --su1, --su2, count--) { 61058527421SVladimir Kondratiev res = *su1 - *su2; 61158527421SVladimir Kondratiev if (res) 61258527421SVladimir Kondratiev break; 61358527421SVladimir Kondratiev } 61458527421SVladimir Kondratiev return res; 61558527421SVladimir Kondratiev } 61658527421SVladimir Kondratiev 61758527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 61858527421SVladimir Kondratiev { 61958527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 62058527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 62158527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 62258527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 62358527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 62458527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 62558527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 62658527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 62758527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 62858527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 62958527421SVladimir Kondratiev 63058527421SVladimir Kondratiev if (!cc->key_set) { 63158527421SVladimir Kondratiev wil_err_ratelimited(wil, 63258527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 63358527421SVladimir Kondratiev cid, tid, mc, key_id); 63458527421SVladimir Kondratiev return -EINVAL; 63558527421SVladimir Kondratiev } 63658527421SVladimir Kondratiev 63758527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 63858527421SVladimir Kondratiev wil_err_ratelimited(wil, 63958527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 64058527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 64158527421SVladimir Kondratiev return -EINVAL; 64258527421SVladimir Kondratiev } 64358527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 64458527421SVladimir Kondratiev 64558527421SVladimir Kondratiev return 0; 64658527421SVladimir Kondratiev } 64758527421SVladimir Kondratiev 6482be7d22fSVladimir Kondratiev /* 6492be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 650e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6512be7d22fSVladimir Kondratiev */ 652b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6532be7d22fSVladimir Kondratiev { 654c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 655c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 656c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 6572be7d22fSVladimir Kondratiev unsigned int len = skb->len; 658c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 65941d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 66058527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 661c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 662c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 663c42da999SVladimir Kondratiev * is not suitable, need to look at data 664c42da999SVladimir Kondratiev */ 665c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 666c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 667c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 668c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 669c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 670c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 671c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 672c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 673c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 674c42da999SVladimir Kondratiev }; 6752be7d22fSVladimir Kondratiev 6760553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 6770553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 6780553640dSVladimir Shulman * set hash to any non-zero value to activate rps 6790553640dSVladimir Shulman * mechanism, core will be chosen according 6800553640dSVladimir Shulman * to user-level rps configuration. 6810553640dSVladimir Shulman */ 6820553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 6830553640dSVladimir Shulman 684241804cbSVladimir Kondratiev skb_orphan(skb); 685241804cbSVladimir Kondratiev 68658527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 68758527421SVladimir Kondratiev rc = GRO_DROP; 68858527421SVladimir Kondratiev dev_kfree_skb(skb); 68958527421SVladimir Kondratiev stats->rx_replay++; 69058527421SVladimir Kondratiev goto stats; 69158527421SVladimir Kondratiev } 69258527421SVladimir Kondratiev 69302beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 694c42da999SVladimir Kondratiev if (mcast) { 695c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 696c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 697c42da999SVladimir Kondratiev */ 698c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 699c42da999SVladimir Kondratiev } else { 700c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 7012be7d22fSVladimir Kondratiev 702c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 703c42da999SVladimir Kondratiev /* The destination station is associated to 704c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 705c42da999SVladimir Kondratiev * directly to it and do not pass it to local 706c42da999SVladimir Kondratiev * net stack. 707c42da999SVladimir Kondratiev */ 708c42da999SVladimir Kondratiev xmit_skb = skb; 709c42da999SVladimir Kondratiev skb = NULL; 710c42da999SVladimir Kondratiev } 711c42da999SVladimir Kondratiev } 712c42da999SVladimir Kondratiev } 713c42da999SVladimir Kondratiev if (xmit_skb) { 714c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 715c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 716c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 717c42da999SVladimir Kondratiev */ 718c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 719c42da999SVladimir Kondratiev xmit_skb->priority += 256; 720c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 721c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 722c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 723c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 724c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 725c42da999SVladimir Kondratiev } 726c42da999SVladimir Kondratiev 727c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 728c42da999SVladimir Kondratiev 729c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 730c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 731c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 732c42da999SVladimir Kondratiev len, gro_res_str[rc]); 733c42da999SVladimir Kondratiev } 73458527421SVladimir Kondratiev stats: 735c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 736b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 737b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 738b5998e6aSVladimir Kondratiev stats->rx_dropped++; 739b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 740b5998e6aSVladimir Kondratiev } else { 7412be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 742c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7432be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 744c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 745c42da999SVladimir Kondratiev if (mcast) 746c42da999SVladimir Kondratiev ndev->stats.multicast++; 747194b482bSVladimir Kondratiev } 7482be7d22fSVladimir Kondratiev } 7492be7d22fSVladimir Kondratiev 7502be7d22fSVladimir Kondratiev /** 7512be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7522be7d22fSVladimir Kondratiev * 753e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7542be7d22fSVladimir Kondratiev */ 755e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7562be7d22fSVladimir Kondratiev { 7572be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 7582be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 7592be7d22fSVladimir Kondratiev struct sk_buff *skb; 7602be7d22fSVladimir Kondratiev 76133c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7622be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7632be7d22fSVladimir Kondratiev return; 7642be7d22fSVladimir Kondratiev } 765af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 766e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 767e0287c4aSVladimir Kondratiev (*quota)--; 7682be7d22fSVladimir Kondratiev 7692be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 7702be7d22fSVladimir Kondratiev skb->dev = ndev; 7712be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7722be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7732be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7742be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 775b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7762be7d22fSVladimir Kondratiev } else { 777b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 7782be7d22fSVladimir Kondratiev } 7792be7d22fSVladimir Kondratiev } 7802be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 7812be7d22fSVladimir Kondratiev } 7822be7d22fSVladimir Kondratiev 783d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 7842be7d22fSVladimir Kondratiev { 7852be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7862be7d22fSVladimir Kondratiev int rc; 7872be7d22fSVladimir Kondratiev 788af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 7899cf10d62SVladimir Kondratiev 7908bf6adb9SVladimir Kondratiev if (vring->va) { 7918bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 7928bf6adb9SVladimir Kondratiev return -EINVAL; 7938bf6adb9SVladimir Kondratiev } 7948bf6adb9SVladimir Kondratiev 795d3762b40SVladimir Kondratiev vring->size = size; 7962be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7972be7d22fSVladimir Kondratiev if (rc) 7982be7d22fSVladimir Kondratiev return rc; 7992be7d22fSVladimir Kondratiev 80047e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8012be7d22fSVladimir Kondratiev if (rc) 8022be7d22fSVladimir Kondratiev goto err_free; 8032be7d22fSVladimir Kondratiev 8042be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8052be7d22fSVladimir Kondratiev if (rc) 8062be7d22fSVladimir Kondratiev goto err_free; 8072be7d22fSVladimir Kondratiev 8082be7d22fSVladimir Kondratiev return 0; 8092be7d22fSVladimir Kondratiev err_free: 8102be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8112be7d22fSVladimir Kondratiev 8122be7d22fSVladimir Kondratiev return rc; 8132be7d22fSVladimir Kondratiev } 8142be7d22fSVladimir Kondratiev 8152be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 8162be7d22fSVladimir Kondratiev { 8172be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8182be7d22fSVladimir Kondratiev 819af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8209cf10d62SVladimir Kondratiev 8212acb4220SVladimir Kondratiev if (vring->va) 8222be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8232be7d22fSVladimir Kondratiev } 8242be7d22fSVladimir Kondratiev 825875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 826875e9439SMaya Erez { 827875e9439SMaya Erez spin_lock_bh(&txdata->lock); 828875e9439SMaya Erez txdata->dot1x_open = 0; 829875e9439SMaya Erez txdata->enabled = 0; 830875e9439SMaya Erez txdata->idle = 0; 831875e9439SMaya Erez txdata->last_idle = 0; 832875e9439SMaya Erez txdata->begin = 0; 833875e9439SMaya Erez txdata->agg_wsize = 0; 834875e9439SMaya Erez txdata->agg_timeout = 0; 835875e9439SMaya Erez txdata->agg_amsdu = 0; 836875e9439SMaya Erez txdata->addba_in_progress = false; 837875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 838875e9439SMaya Erez } 839875e9439SMaya Erez 8402be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 8412be7d22fSVladimir Kondratiev int cid, int tid) 8422be7d22fSVladimir Kondratiev { 8432be7d22fSVladimir Kondratiev int rc; 8442be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 8452be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 8462be7d22fSVladimir Kondratiev .vring_cfg = { 8472be7d22fSVladimir Kondratiev .tx_sw_ring = { 8489a06bec9SVladimir Kondratiev .max_mpdu_size = 849c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 850b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 8512be7d22fSVladimir Kondratiev }, 8522be7d22fSVladimir Kondratiev .ringid = id, 853a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 8542be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 8552be7d22fSVladimir Kondratiev .mac_ctrl = 0, 8562be7d22fSVladimir Kondratiev .to_resolution = 0, 8573277213fSVladimir Kondratiev .agg_max_wsize = 0, 8582be7d22fSVladimir Kondratiev .schd_params = { 8592be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 8602be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 8612be7d22fSVladimir Kondratiev }, 8622be7d22fSVladimir Kondratiev }, 8632be7d22fSVladimir Kondratiev }; 8642be7d22fSVladimir Kondratiev struct { 865b874ddecSLior David struct wmi_cmd_hdr wmi; 8662be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 8672be7d22fSVladimir Kondratiev } __packed reply; 8682be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 869097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8702be7d22fSVladimir Kondratiev 871af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 872e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8739b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 8749cf10d62SVladimir Kondratiev 8752be7d22fSVladimir Kondratiev if (vring->va) { 8762be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 8772be7d22fSVladimir Kondratiev rc = -EINVAL; 8782be7d22fSVladimir Kondratiev goto out; 8792be7d22fSVladimir Kondratiev } 8802be7d22fSVladimir Kondratiev 881875e9439SMaya Erez wil_tx_data_init(txdata); 8822be7d22fSVladimir Kondratiev vring->size = size; 8832be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8842be7d22fSVladimir Kondratiev if (rc) 8852be7d22fSVladimir Kondratiev goto out; 8862be7d22fSVladimir Kondratiev 88793ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 88893ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 88993ae6d49SVladimir Kondratiev 8902be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 8912be7d22fSVladimir Kondratiev 892230d8442SVladimir Kondratiev if (!wil->privacy) 893230d8442SVladimir Kondratiev txdata->dot1x_open = true; 8942be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 8952be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 8962be7d22fSVladimir Kondratiev if (rc) 8972be7d22fSVladimir Kondratiev goto out_free; 8982be7d22fSVladimir Kondratiev 899b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9002be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9012be7d22fSVladimir Kondratiev reply.cmd.status); 902c331997bSVladimir Kondratiev rc = -EINVAL; 9032be7d22fSVladimir Kondratiev goto out_free; 9042be7d22fSVladimir Kondratiev } 9052be7d22fSVladimir Kondratiev 906dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 907dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 908097638a0SVladimir Kondratiev txdata->enabled = 1; 909dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 910dc90506fSMaya Erez 911230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9123a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 913097638a0SVladimir Kondratiev 9142be7d22fSVladimir Kondratiev return 0; 9152be7d22fSVladimir Kondratiev out_free: 916875e9439SMaya Erez spin_lock_bh(&txdata->lock); 917230d8442SVladimir Kondratiev txdata->dot1x_open = false; 918230d8442SVladimir Kondratiev txdata->enabled = 0; 919875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 9202be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9210916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 9220916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 9230916d9f2SMaya Erez 9242be7d22fSVladimir Kondratiev out: 9252be7d22fSVladimir Kondratiev 9262be7d22fSVladimir Kondratiev return rc; 9272be7d22fSVladimir Kondratiev } 9282be7d22fSVladimir Kondratiev 92941d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 93041d6b093SVladimir Kondratiev { 93141d6b093SVladimir Kondratiev int rc; 93241d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 93341d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 93441d6b093SVladimir Kondratiev .vring_cfg = { 93541d6b093SVladimir Kondratiev .tx_sw_ring = { 93641d6b093SVladimir Kondratiev .max_mpdu_size = 93741d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 93841d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 93941d6b093SVladimir Kondratiev }, 94041d6b093SVladimir Kondratiev .ringid = id, 94141d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 94241d6b093SVladimir Kondratiev }, 94341d6b093SVladimir Kondratiev }; 94441d6b093SVladimir Kondratiev struct { 945b874ddecSLior David struct wmi_cmd_hdr wmi; 94641d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 94741d6b093SVladimir Kondratiev } __packed reply; 94841d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 94941d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 95041d6b093SVladimir Kondratiev 951af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 95241d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9539b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 95441d6b093SVladimir Kondratiev 95541d6b093SVladimir Kondratiev if (vring->va) { 95641d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 95741d6b093SVladimir Kondratiev rc = -EINVAL; 95841d6b093SVladimir Kondratiev goto out; 95941d6b093SVladimir Kondratiev } 96041d6b093SVladimir Kondratiev 961875e9439SMaya Erez wil_tx_data_init(txdata); 96241d6b093SVladimir Kondratiev vring->size = size; 96341d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 96441d6b093SVladimir Kondratiev if (rc) 96541d6b093SVladimir Kondratiev goto out; 96641d6b093SVladimir Kondratiev 96741d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 96841d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 96941d6b093SVladimir Kondratiev 97041d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 97141d6b093SVladimir Kondratiev 972230d8442SVladimir Kondratiev if (!wil->privacy) 973230d8442SVladimir Kondratiev txdata->dot1x_open = true; 97441d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 97541d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 97641d6b093SVladimir Kondratiev if (rc) 97741d6b093SVladimir Kondratiev goto out_free; 97841d6b093SVladimir Kondratiev 97941d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 98041d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 98141d6b093SVladimir Kondratiev reply.cmd.status); 98241d6b093SVladimir Kondratiev rc = -EINVAL; 98341d6b093SVladimir Kondratiev goto out_free; 98441d6b093SVladimir Kondratiev } 98541d6b093SVladimir Kondratiev 986dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 987dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 98841d6b093SVladimir Kondratiev txdata->enabled = 1; 989dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 99041d6b093SVladimir Kondratiev 99141d6b093SVladimir Kondratiev return 0; 99241d6b093SVladimir Kondratiev out_free: 993875e9439SMaya Erez spin_lock_bh(&txdata->lock); 994230d8442SVladimir Kondratiev txdata->enabled = 0; 995230d8442SVladimir Kondratiev txdata->dot1x_open = false; 996875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 99741d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 99841d6b093SVladimir Kondratiev out: 99941d6b093SVladimir Kondratiev 100041d6b093SVladimir Kondratiev return rc; 100141d6b093SVladimir Kondratiev } 100241d6b093SVladimir Kondratiev 10032be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 10042be7d22fSVladimir Kondratiev { 10052be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 10063a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 10072be7d22fSVladimir Kondratiev 10089b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1009097638a0SVladimir Kondratiev 10102be7d22fSVladimir Kondratiev if (!vring->va) 10112be7d22fSVladimir Kondratiev return; 10122be7d22fSVladimir Kondratiev 1013af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 10149cf10d62SVladimir Kondratiev 10155933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1016230d8442SVladimir Kondratiev txdata->dot1x_open = false; 10175933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 10185933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 101934b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 102034b8886eSMaya Erez * not prevent the next NAPI run. 102134b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 102234b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 102334b8886eSMaya Erez * handle this vring 102434b8886eSMaya Erez */ 102534b8886eSMaya Erez wmb(); 1026097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 10279419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1028097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1029097638a0SVladimir Kondratiev 10302be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 10312be7d22fSVladimir Kondratiev } 10322be7d22fSVladimir Kondratiev 103341d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 10342be7d22fSVladimir Kondratiev struct sk_buff *skb) 10352be7d22fSVladimir Kondratiev { 10363df2cd36SVladimir Kondratiev int i; 10373df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 10383df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 10392be7d22fSVladimir Kondratiev 10403df2cd36SVladimir Kondratiev if (cid < 0) 10413df2cd36SVladimir Kondratiev return NULL; 10423df2cd36SVladimir Kondratiev 10433df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 10443df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1045230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1046230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1047230d8442SVladimir Kondratiev continue; 10483df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 10493df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1050b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 10518fe59627SVladimir Kondratiev 1052af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1053af3db60aSLazar Alexei eth->h_dest, i); 1054b729aaf0SMaya Erez if (v->va && txdata->enabled) { 10552be7d22fSVladimir Kondratiev return v; 10563df2cd36SVladimir Kondratiev } else { 1057af3db60aSLazar Alexei wil_dbg_txrx(wil, 1058af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1059af3db60aSLazar Alexei i); 10603df2cd36SVladimir Kondratiev return NULL; 10613df2cd36SVladimir Kondratiev } 10623df2cd36SVladimir Kondratiev } 10633df2cd36SVladimir Kondratiev } 10642be7d22fSVladimir Kondratiev 10652be7d22fSVladimir Kondratiev return NULL; 10662be7d22fSVladimir Kondratiev } 10672be7d22fSVladimir Kondratiev 1068fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1069fb3cac57SVladimir Kondratiev struct sk_buff *skb); 107054ed90a8SVladimir Kondratiev 107154ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 107254ed90a8SVladimir Kondratiev struct sk_buff *skb) 107354ed90a8SVladimir Kondratiev { 107454ed90a8SVladimir Kondratiev struct vring *v; 107554ed90a8SVladimir Kondratiev int i; 107654ed90a8SVladimir Kondratiev u8 cid; 1077b729aaf0SMaya Erez struct vring_tx_data *txdata; 107854ed90a8SVladimir Kondratiev 107954ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 108054ed90a8SVladimir Kondratiev * for the AP we connected to. 1081230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 108254ed90a8SVladimir Kondratiev */ 108354ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 108454ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1085b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1086b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 108754ed90a8SVladimir Kondratiev continue; 108854ed90a8SVladimir Kondratiev 108954ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 109041d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 109141d6b093SVladimir Kondratiev continue; 109241d6b093SVladimir Kondratiev 1093230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 109454ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1095230d8442SVladimir Kondratiev continue; 109654ed90a8SVladimir Kondratiev 109754ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 109854ed90a8SVladimir Kondratiev 109954ed90a8SVladimir Kondratiev return v; 110054ed90a8SVladimir Kondratiev } 110154ed90a8SVladimir Kondratiev 110254ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 110354ed90a8SVladimir Kondratiev 110454ed90a8SVladimir Kondratiev return NULL; 110554ed90a8SVladimir Kondratiev } 110654ed90a8SVladimir Kondratiev 110770812421SVladimir Kondratiev /* Use one of 2 strategies: 110870812421SVladimir Kondratiev * 110970812421SVladimir Kondratiev * 1. New (real broadcast): 111070812421SVladimir Kondratiev * use dedicated broadcast vring 111170812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 111270812421SVladimir Kondratiev * Find 1-st vring and return it; 111370812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 111470812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 111570812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 111670812421SVladimir Kondratiev * - for PBSS 111770812421SVladimir Kondratiev */ 111870812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1119fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1120fb3cac57SVladimir Kondratiev { 112141d6b093SVladimir Kondratiev struct vring *v; 1122b729aaf0SMaya Erez struct vring_tx_data *txdata; 112341d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1124fb3cac57SVladimir Kondratiev 112541d6b093SVladimir Kondratiev if (i < 0) 112641d6b093SVladimir Kondratiev return NULL; 1127fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1128b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1129b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1130fb3cac57SVladimir Kondratiev return NULL; 1131230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1132230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1133230d8442SVladimir Kondratiev return NULL; 1134fb3cac57SVladimir Kondratiev 1135fb3cac57SVladimir Kondratiev return v; 1136fb3cac57SVladimir Kondratiev } 1137fb3cac57SVladimir Kondratiev 113870812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 113970812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 114070812421SVladimir Kondratiev { 114170812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 114270812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 114370812421SVladimir Kondratiev 114470812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 114570812421SVladimir Kondratiev } 114670812421SVladimir Kondratiev 114770812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 114870812421SVladimir Kondratiev struct sk_buff *skb) 114970812421SVladimir Kondratiev { 115070812421SVladimir Kondratiev struct vring *v, *v2; 115170812421SVladimir Kondratiev struct sk_buff *skb2; 115270812421SVladimir Kondratiev int i; 115370812421SVladimir Kondratiev u8 cid; 115470812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 115570812421SVladimir Kondratiev char *src = eth->h_source; 1156b729aaf0SMaya Erez struct vring_tx_data *txdata; 115770812421SVladimir Kondratiev 115870812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 115970812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 116070812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1161b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1162b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 116370812421SVladimir Kondratiev continue; 116470812421SVladimir Kondratiev 116570812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 116670812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116770812421SVladimir Kondratiev continue; 1168230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1169230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 117070812421SVladimir Kondratiev continue; 117170812421SVladimir Kondratiev 117270812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 117370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 117470812421SVladimir Kondratiev continue; 117570812421SVladimir Kondratiev 117670812421SVladimir Kondratiev goto found; 117770812421SVladimir Kondratiev } 117870812421SVladimir Kondratiev 117970812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 118070812421SVladimir Kondratiev 118170812421SVladimir Kondratiev return NULL; 118270812421SVladimir Kondratiev 118370812421SVladimir Kondratiev found: 118470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 118570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 118670812421SVladimir Kondratiev 118770812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 118870812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 118970812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 119070812421SVladimir Kondratiev if (!v2->va) 119170812421SVladimir Kondratiev continue; 119270812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 119370812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 119470812421SVladimir Kondratiev continue; 1195230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1196230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 119770812421SVladimir Kondratiev continue; 119870812421SVladimir Kondratiev 119970812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 120070812421SVladimir Kondratiev continue; 120170812421SVladimir Kondratiev 120270812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 120370812421SVladimir Kondratiev if (skb2) { 120470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 120570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 120670812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 120770812421SVladimir Kondratiev } else { 120870812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 120970812421SVladimir Kondratiev } 121070812421SVladimir Kondratiev } 121170812421SVladimir Kondratiev 121270812421SVladimir Kondratiev return v; 121370812421SVladimir Kondratiev } 121470812421SVladimir Kondratiev 121599b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 121699b55bd2SKirshenbaum Erez int vring_index) 12172be7d22fSVladimir Kondratiev { 121868ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 12192be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 12202be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 12212be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 12222be7d22fSVladimir Kondratiev d->dma.error = 0; 12232be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 12247e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 122599b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 12262be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 12272be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 12282be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 12292be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 12302be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 12312be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 12322be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 12332be7d22fSVladimir Kondratiev 12342be7d22fSVladimir Kondratiev return 0; 12352be7d22fSVladimir Kondratiev } 12362be7d22fSVladimir Kondratiev 1237c236658fSVladimir Kondratiev static inline 1238c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1239c236658fSVladimir Kondratiev { 12403d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1241c236658fSVladimir Kondratiev } 1242c236658fSVladimir Kondratiev 12433d4bde15SVladimir Kondratiev /** 12443d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12453d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12463d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12473d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 12483d4bde15SVladimir Kondratiev */ 12493d4bde15SVladimir Kondratiev 12503d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 12513d4bde15SVladimir Kondratiev struct sk_buff *skb, 12523d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 12533d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1254504937d4SKirshenbaum Erez { 12553d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 12563d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 12573d4bde15SVladimir Kondratiev 12583d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 12593d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 12603d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 12613d4bde15SVladimir Kondratiev 12623d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 12633d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 12643d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 12653d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 12663d4bde15SVladimir Kondratiev 12673d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 12683d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 12693d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 12703d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 12713d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 12723d4bde15SVladimir Kondratiev } 12733d4bde15SVladimir Kondratiev 12743d4bde15SVladimir Kondratiev /** 12753d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 12763d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12773d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 12783d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 12793d4bde15SVladimir Kondratiev * 12803d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 12813d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 12823d4bde15SVladimir Kondratiev */ 12833d4bde15SVladimir Kondratiev 12843d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 12853d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1286504937d4SKirshenbaum Erez int protocol; 1287504937d4SKirshenbaum Erez 1288504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1289504937d4SKirshenbaum Erez return 0; 1290504937d4SKirshenbaum Erez 1291df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1292df2d08eeSVladimir Kondratiev 1293504937d4SKirshenbaum Erez switch (skb->protocol) { 1294504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1295504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1296df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1297504937d4SKirshenbaum Erez break; 1298504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1299504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1300504937d4SKirshenbaum Erez break; 1301504937d4SKirshenbaum Erez default: 1302504937d4SKirshenbaum Erez return -EINVAL; 1303504937d4SKirshenbaum Erez } 1304504937d4SKirshenbaum Erez 1305504937d4SKirshenbaum Erez switch (protocol) { 1306504937d4SKirshenbaum Erez case IPPROTO_TCP: 1307504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1308504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1309504937d4SKirshenbaum Erez d->dma.d0 |= 1310504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1311504937d4SKirshenbaum Erez break; 1312504937d4SKirshenbaum Erez case IPPROTO_UDP: 1313504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1314504937d4SKirshenbaum Erez d->dma.d0 |= 1315504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1316504937d4SKirshenbaum Erez break; 1317504937d4SKirshenbaum Erez default: 1318504937d4SKirshenbaum Erez return -EINVAL; 1319504937d4SKirshenbaum Erez } 1320504937d4SKirshenbaum Erez 1321504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1322504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1323504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1324504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1325504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1326504937d4SKirshenbaum Erez 1327504937d4SKirshenbaum Erez return 0; 1328504937d4SKirshenbaum Erez } 1329504937d4SKirshenbaum Erez 13303d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13313d4bde15SVladimir Kondratiev { 13323d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13333d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13343d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13353d4bde15SVladimir Kondratiev } 13363d4bde15SVladimir Kondratiev 13373d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13383d4bde15SVladimir Kondratiev { 13393d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13403d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13413d4bde15SVladimir Kondratiev } 13423d4bde15SVladimir Kondratiev 13433d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 13443d4bde15SVladimir Kondratiev struct sk_buff *skb) 13453d4bde15SVladimir Kondratiev { 13463d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13473d4bde15SVladimir Kondratiev 13483d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 13493d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 13503d4bde15SVladimir Kondratiev *_first_desc = NULL; 13513d4bde15SVladimir Kondratiev 13523d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 13533d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 13543d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 13553d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 13563d4bde15SVladimir Kondratiev 13573d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 13583d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 13593d4bde15SVladimir Kondratiev 13603d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 13613d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 13623d4bde15SVladimir Kondratiev 13633d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 13643d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 13653d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 13663d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 13673d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 13683d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 13693d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 13703d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 13713d4bde15SVladimir Kondratiev uint i = swhead; 13723d4bde15SVladimir Kondratiev dma_addr_t pa; 13733d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 13743d4bde15SVladimir Kondratiev int rem_data = mss; 13753d4bde15SVladimir Kondratiev int lenmss; 13763d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 13773d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 13783d4bde15SVladimir Kondratiev bool is_ipv4; 13793d4bde15SVladimir Kondratiev int tcp_hdr_len; 13803d4bde15SVladimir Kondratiev int skb_net_hdr_len; 13813d4bde15SVladimir Kondratiev int gso_type; 1382e3d2ed94SHamad Kadmany int rc = -EINVAL; 13833d4bde15SVladimir Kondratiev 1384af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1385af3db60aSLazar Alexei vring_index); 13863d4bde15SVladimir Kondratiev 13873d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 13883d4bde15SVladimir Kondratiev return -EINVAL; 13893d4bde15SVladimir Kondratiev 13903d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 13913d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 13923d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 13933d4bde15SVladimir Kondratiev * this is the initial check only. 13943d4bde15SVladimir Kondratiev */ 13953d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 13963d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 13973d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 13983d4bde15SVladimir Kondratiev vring_index, min_desc_required); 13993d4bde15SVladimir Kondratiev return -ENOMEM; 14003d4bde15SVladimir Kondratiev } 14013d4bde15SVladimir Kondratiev 14023d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14033d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14043d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14053d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14063d4bde15SVladimir Kondratiev 14073d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14083d4bde15SVladimir Kondratiev switch (gso_type) { 14093d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14103d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14113d4bde15SVladimir Kondratiev * as required by the offloading doc 14123d4bde15SVladimir Kondratiev */ 14133d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14143d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14153d4bde15SVladimir Kondratiev is_ipv4 = true; 14163d4bde15SVladimir Kondratiev break; 14173d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14183d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14193d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14203d4bde15SVladimir Kondratiev is_ipv4 = false; 14213d4bde15SVladimir Kondratiev break; 14223d4bde15SVladimir Kondratiev default: 14233d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 14243d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14253d4bde15SVladimir Kondratiev */ 14263d4bde15SVladimir Kondratiev return -EINVAL; 14273d4bde15SVladimir Kondratiev } 14283d4bde15SVladimir Kondratiev 14293d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14303d4bde15SVladimir Kondratiev return -EINVAL; 14313d4bde15SVladimir Kondratiev 14323d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14333d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14343d4bde15SVladimir Kondratiev */ 14353d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14363d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14373d4bde15SVladimir Kondratiev 14383d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 14393d4bde15SVladimir Kondratiev 14403d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14413d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 14423d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 14433d4bde15SVladimir Kondratiev goto err_exit; 14443d4bde15SVladimir Kondratiev } 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 14473d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 14483d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 14493d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 14503d4bde15SVladimir Kondratiev 14513d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14523d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 14533d4bde15SVladimir Kondratiev 14543d4bde15SVladimir Kondratiev descs_used++; 14553d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 14563d4bde15SVladimir Kondratiev 14573d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 14583d4bde15SVladimir Kondratiev if (headlen) { 14593d4bde15SVladimir Kondratiev len = headlen; 14603d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 14613d4bde15SVladimir Kondratiev len); 14623d4bde15SVladimir Kondratiev } else { 14633d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 14643d4bde15SVladimir Kondratiev len = frag->size; 14653d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 14663d4bde15SVladimir Kondratiev } 14673d4bde15SVladimir Kondratiev 14683d4bde15SVladimir Kondratiev while (len) { 14693d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14703d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 14713d4bde15SVladimir Kondratiev len, rem_data, descs_used); 14723d4bde15SVladimir Kondratiev 14733d4bde15SVladimir Kondratiev if (descs_used == avail) { 1474e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1475e3d2ed94SHamad Kadmany rc = -ENOMEM; 1476e3d2ed94SHamad Kadmany goto mem_error; 14773d4bde15SVladimir Kondratiev } 14783d4bde15SVladimir Kondratiev 14793d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 14803d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14813d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 14823d4bde15SVladimir Kondratiev 14833d4bde15SVladimir Kondratiev if (!headlen) { 14843d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 14853d4bde15SVladimir Kondratiev frag->size - len, lenmss, 14863d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14873d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 14883d4bde15SVladimir Kondratiev } else { 14893d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 14903d4bde15SVladimir Kondratiev skb->data + 14913d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 14923d4bde15SVladimir Kondratiev lenmss, 14933d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14943d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14953d4bde15SVladimir Kondratiev headlen -= lenmss; 14963d4bde15SVladimir Kondratiev } 14973d4bde15SVladimir Kondratiev 1498e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1499e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1500e3d2ed94SHamad Kadmany goto mem_error; 1501e3d2ed94SHamad Kadmany } 15023d4bde15SVladimir Kondratiev 15033d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15043d4bde15SVladimir Kondratiev 15053d4bde15SVladimir Kondratiev if (!_first_desc) { 15063d4bde15SVladimir Kondratiev _first_desc = _desc; 15073d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15083d4bde15SVladimir Kondratiev d = first_desc; 15093d4bde15SVladimir Kondratiev } else { 15103d4bde15SVladimir Kondratiev d = &desc_mem; 15113d4bde15SVladimir Kondratiev } 15123d4bde15SVladimir Kondratiev 15133d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 15143d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15153d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15163d4bde15SVladimir Kondratiev skb_net_hdr_len); 15173d4bde15SVladimir Kondratiev 15183d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15193d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15203d4bde15SVladimir Kondratiev 15213d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15223d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 15233d4bde15SVladimir Kondratiev len -= lenmss; 15243d4bde15SVladimir Kondratiev rem_data -= lenmss; 15253d4bde15SVladimir Kondratiev 15263d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15273d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15283d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15293d4bde15SVladimir Kondratiev 15303d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15313d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15323d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15333d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15343d4bde15SVladimir Kondratiev * release 15353d4bde15SVladimir Kondratiev */ 15363d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15373d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15383d4bde15SVladimir Kondratiev sg_desc_cnt + 15393d4bde15SVladimir Kondratiev 1); 15403d4bde15SVladimir Kondratiev hdr_compensation_need = false; 15413d4bde15SVladimir Kondratiev } else { 15423d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15433d4bde15SVladimir Kondratiev sg_desc_cnt); 15443d4bde15SVladimir Kondratiev } 15453d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 15463d4bde15SVladimir Kondratiev 15473d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 15483d4bde15SVladimir Kondratiev 15493d4bde15SVladimir Kondratiev /* first descriptor may also be the last 15503d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 15513d4bde15SVladimir Kondratiev * it twice 15523d4bde15SVladimir Kondratiev */ 15533d4bde15SVladimir Kondratiev if (first_desc != d) 15543d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 15553d4bde15SVladimir Kondratiev 15563d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 15573d4bde15SVladimir Kondratiev * of this TS processing 15583d4bde15SVladimir Kondratiev */ 15593d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 15603d4bde15SVladimir Kondratiev *_desc = *d; 15613d4bde15SVladimir Kondratiev 15623d4bde15SVladimir Kondratiev rem_data = mss; 15633d4bde15SVladimir Kondratiev _first_desc = NULL; 15643d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 15653d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 15663d4bde15SVladimir Kondratiev *_desc = *d; 15673d4bde15SVladimir Kondratiev } 15683d4bde15SVladimir Kondratiev } 15693d4bde15SVladimir Kondratiev 15703d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 15713d4bde15SVladimir Kondratiev * in this case d pointer is invalid 15723d4bde15SVladimir Kondratiev */ 15733d4bde15SVladimir Kondratiev if (_first_desc == _desc) 15743d4bde15SVladimir Kondratiev d = first_desc; 15753d4bde15SVladimir Kondratiev 15763d4bde15SVladimir Kondratiev /* Last data descriptor */ 15773d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 15783d4bde15SVladimir Kondratiev *_desc = *d; 15793d4bde15SVladimir Kondratiev 15803d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 15813d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 15823d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 15833d4bde15SVladimir Kondratiev 15843d4bde15SVladimir Kondratiev /* hold reference to skb 15853d4bde15SVladimir Kondratiev * to prevent skb release before accounting 15863d4bde15SVladimir Kondratiev * in case of immediate "tx done" 15873d4bde15SVladimir Kondratiev */ 15883d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15893d4bde15SVladimir Kondratiev 15903d4bde15SVladimir Kondratiev /* performance monitoring */ 15913d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 15923d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 15933d4bde15SVladimir Kondratiev used, used + descs_used)) { 15943d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15953d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15963d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 15973d4bde15SVladimir Kondratiev } 15983d4bde15SVladimir Kondratiev 1599eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1600eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1601eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1602eb26cff1SMaya Erez * skb before it was completed. 1603eb26cff1SMaya Erez */ 1604eb26cff1SMaya Erez wmb(); 1605eb26cff1SMaya Erez 16063d4bde15SVladimir Kondratiev /* advance swhead */ 16073d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1608e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16093d4bde15SVladimir Kondratiev 16103d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16113d4bde15SVladimir Kondratiev * committing them to HW 16123d4bde15SVladimir Kondratiev */ 16133d4bde15SVladimir Kondratiev wmb(); 16143d4bde15SVladimir Kondratiev 1615b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16163d4bde15SVladimir Kondratiev return 0; 16173d4bde15SVladimir Kondratiev 1618e3d2ed94SHamad Kadmany mem_error: 16193d4bde15SVladimir Kondratiev while (descs_used > 0) { 16203d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16213d4bde15SVladimir Kondratiev 1622a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 16233d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 16243d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 16253d4bde15SVladimir Kondratiev *d = *_desc; 16263d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16273d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16283d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 16293d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16303d4bde15SVladimir Kondratiev descs_used--; 16313d4bde15SVladimir Kondratiev } 16323d4bde15SVladimir Kondratiev err_exit: 1633e3d2ed94SHamad Kadmany return rc; 16343d4bde15SVladimir Kondratiev } 16353d4bde15SVladimir Kondratiev 16365933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16372be7d22fSVladimir Kondratiev struct sk_buff *skb) 16382be7d22fSVladimir Kondratiev { 16392be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 164068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 164168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 16422be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 16432be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 16442be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1645504937d4SKirshenbaum Erez uint f = 0; 16462be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16477c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16482be7d22fSVladimir Kondratiev uint i = swhead; 16492be7d22fSVladimir Kondratiev dma_addr_t pa; 16500436fd9aSVladimir Shulman int used; 165141d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 165241d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 16532be7d22fSVladimir Kondratiev 1654af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring: %d bytes to vring %d\n", skb->len, 1655af3db60aSLazar Alexei vring_index); 16562be7d22fSVladimir Kondratiev 16575933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 16585933a06dSVladimir Kondratiev return -EINVAL; 16595933a06dSVladimir Kondratiev 166033c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 166170801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 16625b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 16635b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 16642be7d22fSVladimir Kondratiev return -ENOMEM; 16652be7d22fSVladimir Kondratiev } 16668fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16672be7d22fSVladimir Kondratiev 16688fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 16692be7d22fSVladimir Kondratiev 16705b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 16715b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 16727743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 16732be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 16742be7d22fSVladimir Kondratiev 16752be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 16762be7d22fSVladimir Kondratiev return -EINVAL; 16772232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16782be7d22fSVladimir Kondratiev /* 1-st segment */ 167941d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 168041d6b093SVladimir Kondratiev if (unlikely(mcast)) { 168141d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1682230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 168341d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 168441d6b093SVladimir Kondratiev } 1685504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 16863d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 16875b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1688504937d4SKirshenbaum Erez vring_index); 1689504937d4SKirshenbaum Erez goto dma_error; 1690504937d4SKirshenbaum Erez } 1691504937d4SKirshenbaum Erez 1692c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 16933d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 169468ada71eSVladimir Kondratiev 16952be7d22fSVladimir Kondratiev /* middle segments */ 1696504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 16972be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 16982be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 16992be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17008fe59627SVladimir Kondratiev 1701e59d16c0SVladimir Kondratiev *_d = *d; 17025b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17035b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17045b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17052be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 17068fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17072be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17082be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1709e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1710e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1711e3d2ed94SHamad Kadmany vring_index); 17122be7d22fSVladimir Kondratiev goto dma_error; 1713e3d2ed94SHamad Kadmany } 17142232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 171599b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1716c236658fSVladimir Kondratiev /* no need to check return code - 1717c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1718c236658fSVladimir Kondratiev * it will succeed here too 1719c236658fSVladimir Kondratiev */ 17203d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17212be7d22fSVladimir Kondratiev } 17222be7d22fSVladimir Kondratiev /* for the last seg only */ 17232be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1724668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17252be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 172668ada71eSVladimir Kondratiev *_d = *d; 17275b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17285b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17295b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17302be7d22fSVladimir Kondratiev 17316cdadd4dSVladimir Kondratiev /* hold reference to skb 17326cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17336cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17346cdadd4dSVladimir Kondratiev */ 17356cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17366cdadd4dSVladimir Kondratiev 17370436fd9aSVladimir Shulman /* performance monitoring */ 17380436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 17390436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 17400436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 17417c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17420436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17430436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 17440436fd9aSVladimir Shulman } 17457c0acf86SVladimir Kondratiev 1746eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1747eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1748eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1749eb26cff1SMaya Erez * skb before it was completed. 1750eb26cff1SMaya Erez */ 1751eb26cff1SMaya Erez wmb(); 1752eb26cff1SMaya Erez 17532be7d22fSVladimir Kondratiev /* advance swhead */ 17542be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 17555b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 17565b29c573SVladimir Kondratiev vring->swhead); 175798658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 17583d4bde15SVladimir Kondratiev 17593d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17603d4bde15SVladimir Kondratiev * committing them to HW 17613d4bde15SVladimir Kondratiev */ 17623d4bde15SVladimir Kondratiev wmb(); 17633d4bde15SVladimir Kondratiev 1764b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17652be7d22fSVladimir Kondratiev 17662be7d22fSVladimir Kondratiev return 0; 17672be7d22fSVladimir Kondratiev dma_error: 17682be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1769c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1770c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1771c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 17727e594444SVladimir Kondratiev 17732be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1774c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 17758fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 177668ada71eSVladimir Kondratiev *d = *_d; 177768ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 17782232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1779f88f113aSVladimir Kondratiev 1780f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17812be7d22fSVladimir Kondratiev } 17822be7d22fSVladimir Kondratiev 17832be7d22fSVladimir Kondratiev return -EINVAL; 17842be7d22fSVladimir Kondratiev } 17852be7d22fSVladimir Kondratiev 17865933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17875933a06dSVladimir Kondratiev struct sk_buff *skb) 17885933a06dSVladimir Kondratiev { 17895933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17905933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17915933a06dSVladimir Kondratiev int rc; 17925933a06dSVladimir Kondratiev 17935933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 17943d4bde15SVladimir Kondratiev 17953d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 17963d4bde15SVladimir Kondratiev (wil, vring, skb); 17973d4bde15SVladimir Kondratiev 17985933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 17993d4bde15SVladimir Kondratiev 18005933a06dSVladimir Kondratiev return rc; 18015933a06dSVladimir Kondratiev } 18025933a06dSVladimir Kondratiev 1803f9e3033fSDedy Lansky /** 1804f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 1805f9e3033fSDedy Lansky * 1806f9e3033fSDedy Lansky * This function does one of two checks: 1807f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1808f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1809f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1810f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1811f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1812f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1813f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1814f9e3033fSDedy Lansky * 1815f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1816f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1817f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1818f9e3033fSDedy Lansky */ 1819f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 1820f9e3033fSDedy Lansky struct vring *vring, 1821f9e3033fSDedy Lansky bool check_stop) 1822f9e3033fSDedy Lansky { 1823f9e3033fSDedy Lansky int i; 1824f9e3033fSDedy Lansky 1825f9e3033fSDedy Lansky if (vring) 1826f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d, check_stop=%d, stopped=%d", 1827f9e3033fSDedy Lansky (int)(vring - wil->vring_tx), check_stop, 1828f9e3033fSDedy Lansky wil->net_queue_stopped); 1829f9e3033fSDedy Lansky else 1830f9e3033fSDedy Lansky wil_dbg_txrx(wil, "check_stop=%d, stopped=%d", 1831f9e3033fSDedy Lansky check_stop, wil->net_queue_stopped); 1832f9e3033fSDedy Lansky 1833f9e3033fSDedy Lansky if (check_stop == wil->net_queue_stopped) 1834f9e3033fSDedy Lansky /* net queues already in desired state */ 1835f9e3033fSDedy Lansky return; 1836f9e3033fSDedy Lansky 1837f9e3033fSDedy Lansky if (check_stop) { 1838f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1839f9e3033fSDedy Lansky /* not enough room in the vring */ 1840f9e3033fSDedy Lansky netif_tx_stop_all_queues(wil_to_ndev(wil)); 1841f9e3033fSDedy Lansky wil->net_queue_stopped = true; 1842f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1843f9e3033fSDedy Lansky } 1844f9e3033fSDedy Lansky return; 1845f9e3033fSDedy Lansky } 1846f9e3033fSDedy Lansky 1847f9e3033fSDedy Lansky /* check wake */ 1848f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1849f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1850f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1851f9e3033fSDedy Lansky 1852f9e3033fSDedy Lansky if (!cur_vring->va || !txdata->enabled || cur_vring == vring) 1853f9e3033fSDedy Lansky continue; 1854f9e3033fSDedy Lansky 1855f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1856f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1857f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1858f9e3033fSDedy Lansky return; 1859f9e3033fSDedy Lansky } 1860f9e3033fSDedy Lansky } 1861f9e3033fSDedy Lansky 1862f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1863f9e3033fSDedy Lansky /* enough room in the vring */ 1864f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 1865f9e3033fSDedy Lansky netif_tx_wake_all_queues(wil_to_ndev(wil)); 1866f9e3033fSDedy Lansky wil->net_queue_stopped = false; 1867f9e3033fSDedy Lansky } 1868f9e3033fSDedy Lansky } 1869f9e3033fSDedy Lansky 1870f9e3033fSDedy Lansky void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring, 1871f9e3033fSDedy Lansky bool check_stop) 1872f9e3033fSDedy Lansky { 1873f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 1874f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1875f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1876f9e3033fSDedy Lansky } 1877f9e3033fSDedy Lansky 1878f9e3033fSDedy Lansky void wil_update_net_queues_bh(struct wil6210_priv *wil, struct vring *vring, 1879f9e3033fSDedy Lansky bool check_stop) 1880f9e3033fSDedy Lansky { 1881f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 1882f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1883f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1884f9e3033fSDedy Lansky } 1885f9e3033fSDedy Lansky 18862be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 18872be7d22fSVladimir Kondratiev { 18882be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 18893df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 189041d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 18912be7d22fSVladimir Kondratiev struct vring *vring; 1892aa27deaaSVladimir Kondratiev static bool pr_once_fw; 18932be7d22fSVladimir Kondratiev int rc; 18942be7d22fSVladimir Kondratiev 1895af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 189633c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1897aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 18982be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1899aa27deaaSVladimir Kondratiev pr_once_fw = true; 1900aa27deaaSVladimir Kondratiev } 19012be7d22fSVladimir Kondratiev goto drop; 19022be7d22fSVladimir Kondratiev } 190333c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1904d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 19052be7d22fSVladimir Kondratiev goto drop; 19062be7d22fSVladimir Kondratiev } 190733c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 19082be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 19092be7d22fSVladimir Kondratiev goto drop; 19102be7d22fSVladimir Kondratiev } 1911aa27deaaSVladimir Kondratiev pr_once_fw = false; 1912d58db4e4SVladimir Kondratiev 19132be7d22fSVladimir Kondratiev /* find vring */ 1914a895cb8bSLior David if (wil->wdev->iftype == NL80211_IFTYPE_STATION && !wil->pbss) { 1915a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 191654ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 1917a895cb8bSLior David } else if (bcast) { 1918a895cb8bSLior David if (wil->pbss) 1919a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 1920a895cb8bSLior David * all stations VRINGs 1921a895cb8bSLior David */ 1922a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 1923a895cb8bSLior David else if (wil->wdev->iftype == NL80211_IFTYPE_AP) 1924a895cb8bSLior David /* AP has a dedicated bcast VRING */ 1925a895cb8bSLior David vring = wil_find_tx_bcast_1(wil, skb); 1926a895cb8bSLior David else 1927a895cb8bSLior David /* unexpected combination, fallback to duplicating 1928a895cb8bSLior David * the skb in all stations VRINGs 1929a895cb8bSLior David */ 1930a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 1931a895cb8bSLior David } else { 1932a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 1933a895cb8bSLior David vring = wil_find_tx_ucast(wil, skb); 193454ed90a8SVladimir Kondratiev } 193533c477fdSVladimir Kondratiev if (unlikely(!vring)) { 19365aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 19372be7d22fSVladimir Kondratiev goto drop; 19382be7d22fSVladimir Kondratiev } 19392be7d22fSVladimir Kondratiev /* set up vring entry */ 19402be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1941d58db4e4SVladimir Kondratiev 19422be7d22fSVladimir Kondratiev switch (rc) { 19432be7d22fSVladimir Kondratiev case 0: 1944f9e3033fSDedy Lansky /* shall we stop net queues? */ 1945f9e3033fSDedy Lansky wil_update_net_queues_bh(wil, vring, true); 1946795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 19472be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 19482be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 19492be7d22fSVladimir Kondratiev case -ENOMEM: 19502be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 19512be7d22fSVladimir Kondratiev default: 1952afda8bb5SVladimir Kondratiev break; /* goto drop; */ 19532be7d22fSVladimir Kondratiev } 19542be7d22fSVladimir Kondratiev drop: 19552be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 19562be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 19572be7d22fSVladimir Kondratiev 19582be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 19592be7d22fSVladimir Kondratiev } 19602be7d22fSVladimir Kondratiev 1961713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1962713c8a29SVladimir Kondratiev { 1963713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1964713c8a29SVladimir Kondratiev 1965713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1966713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1967713c8a29SVladimir Kondratiev } 1968713c8a29SVladimir Kondratiev 1969713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1970713c8a29SVladimir Kondratiev { 1971713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1972713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1973713c8a29SVladimir Kondratiev else 1974713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1975713c8a29SVladimir Kondratiev } 1976713c8a29SVladimir Kondratiev 19772be7d22fSVladimir Kondratiev /** 19782be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 19792be7d22fSVladimir Kondratiev * 1980e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1981e0287c4aSVladimir Kondratiev * 19822be7d22fSVladimir Kondratiev * Safe to call from IRQ 19832be7d22fSVladimir Kondratiev */ 1984e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 19852be7d22fSVladimir Kondratiev { 1986795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 19872be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 19882be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1989097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1990e0287c4aSVladimir Kondratiev int done = 0; 1991c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 199241d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1993c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 19940436fd9aSVladimir Shulman int used_before_complete; 19950436fd9aSVladimir Shulman int used_new; 19962be7d22fSVladimir Kondratiev 199733c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 19982be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1999e0287c4aSVladimir Kondratiev return 0; 20002be7d22fSVladimir Kondratiev } 20012be7d22fSVladimir Kondratiev 200233c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2003097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2004097638a0SVladimir Kondratiev return 0; 2005097638a0SVladimir Kondratiev } 2006097638a0SVladimir Kondratiev 2007af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 20082be7d22fSVladimir Kondratiev 20090436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 20100436fd9aSVladimir Shulman 201141d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 201241d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 201341d6b093SVladimir Kondratiev 20142be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 2015c236658fSVladimir Kondratiev int new_swtail; 2016c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2017c236658fSVladimir Kondratiev /** 2018c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 20193d4bde15SVladimir Kondratiev * last fragment. look for it. 20203d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2021c236658fSVladimir Kondratiev */ 2022c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2023c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2024c236658fSVladimir Kondratiev 2025c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 202633c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2027c236658fSVladimir Kondratiev break; 2028c236658fSVladimir Kondratiev 2029c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2030c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 20314de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 20327e594444SVladimir Kondratiev u16 dmalen; 203376dfa4b7SVladimir Kondratiev struct sk_buff *skb; 203476dfa4b7SVladimir Kondratiev 203576dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 203676dfa4b7SVladimir Kondratiev skb = ctx->skb; 2037c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 20384de41befSVladimir Kondratiev 203968ada71eSVladimir Kondratiev *d = *_d; 20404de41befSVladimir Kondratiev 20417e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 204298658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 204398658095SVladimir Kondratiev d->dma.error); 20447743882dSVladimir Kondratiev wil_dbg_txrx(wil, 20455b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 20465b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 20475b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 20485b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 20492be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 20502be7d22fSVladimir Kondratiev 20512232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2052f88f113aSVladimir Kondratiev 20532be7d22fSVladimir Kondratiev if (skb) { 205433c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2055795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2056795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 205741d6b093SVladimir Kondratiev if (stats) { 205841d6b093SVladimir Kondratiev stats->tx_packets++; 2059c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 206041d6b093SVladimir Kondratiev } 2061795ce734SVladimir Kondratiev } else { 2062795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 206341d6b093SVladimir Kondratiev if (stats) 2064c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2065795ce734SVladimir Kondratiev } 2066713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 20672be7d22fSVladimir Kondratiev } 2068f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2069eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2070eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2071eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2072eb26cff1SMaya Erez * is completed. 2073eb26cff1SMaya Erez */ 2074eb26cff1SMaya Erez wmb(); 2075c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 207603269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 207703269c65SVladimir Kondratiev * so hardware will not try to process this desc., 207803269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 207903269c65SVladimir Kondratiev */ 20802be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2081e0287c4aSVladimir Kondratiev done++; 20822be7d22fSVladimir Kondratiev } 2083c236658fSVladimir Kondratiev } 208467c3e1b4SVladimir Kondratiev 20850436fd9aSVladimir Shulman /* performance monitoring */ 20860436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 20870436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 20880436fd9aSVladimir Shulman used_new, used_before_complete)) { 20890436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 20900436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 20917c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 20927c0acf86SVladimir Kondratiev } 209367c3e1b4SVladimir Kondratiev 2094f9e3033fSDedy Lansky /* shall we wake net queues? */ 2095f9e3033fSDedy Lansky if (done) 2096f9e3033fSDedy Lansky wil_update_net_queues(wil, vring, false); 2097e0287c4aSVladimir Kondratiev 2098e0287c4aSVladimir Kondratiev return done; 20992be7d22fSVladimir Kondratiev } 2100