12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 32be7d22fSVladimir Kondratiev * 42be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 52be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 62be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 72be7d22fSVladimir Kondratiev * 82be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 92be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 102be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 112be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 122be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 132be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 142be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 152be7d22fSVladimir Kondratiev */ 162be7d22fSVladimir Kondratiev 172be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 182be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 192be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 202be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 21504937d4SKirshenbaum Erez #include <linux/ip.h> 22504937d4SKirshenbaum Erez #include <linux/ipv6.h> 23504937d4SKirshenbaum Erez #include <net/ipv6.h> 240786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 252be7d22fSVladimir Kondratiev 262be7d22fSVladimir Kondratiev #include "wil6210.h" 272be7d22fSVladimir Kondratiev #include "wmi.h" 282be7d22fSVladimir Kondratiev #include "txrx.h" 2998658095SVladimir Kondratiev #include "trace.h" 302be7d22fSVladimir Kondratiev 312be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3278484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 332be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 342be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 352be7d22fSVladimir Kondratiev 36c406ea7cSVladimir Kondratiev bool rx_align_2; 3778484c44SMaya Erez module_param(rx_align_2, bool, 0444); 38c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 39c406ea7cSVladimir Kondratiev 4052a45702SLior David bool rx_large_buf; 4152a45702SLior David module_param(rx_large_buf, bool, 0444); 4252a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4352a45702SLior David 44c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 45c406ea7cSVladimir Kondratiev { 46c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 47c406ea7cSVladimir Kondratiev } 48c406ea7cSVladimir Kondratiev 492be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 502be7d22fSVladimir Kondratiev { 512be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 522be7d22fSVladimir Kondratiev } 532be7d22fSVladimir Kondratiev 542be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 552be7d22fSVladimir Kondratiev { 562be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 572be7d22fSVladimir Kondratiev } 582be7d22fSVladimir Kondratiev 592be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 602be7d22fSVladimir Kondratiev { 612be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 622be7d22fSVladimir Kondratiev } 632be7d22fSVladimir Kondratiev 642be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 652be7d22fSVladimir Kondratiev { 662be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 672be7d22fSVladimir Kondratiev } 688fe59627SVladimir Kondratiev 690436fd9aSVladimir Shulman /* Used space in Tx Vring */ 700436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 712be7d22fSVladimir Kondratiev { 722be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 732be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 740436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 752be7d22fSVladimir Kondratiev } 762be7d22fSVladimir Kondratiev 770436fd9aSVladimir Shulman /* Available space in Tx Vring */ 780436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 790436fd9aSVladimir Shulman { 800436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 810436fd9aSVladimir Shulman } 820436fd9aSVladimir Shulman 830436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 845bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 855bb6423eSVladimir Kondratiev { 865bb6423eSVladimir Kondratiev return vring->size/8; 875bb6423eSVladimir Kondratiev } 885bb6423eSVladimir Kondratiev 890436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 905bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 915bb6423eSVladimir Kondratiev { 925bb6423eSVladimir Kondratiev return vring->size/4; 935bb6423eSVladimir Kondratiev } 945bb6423eSVladimir Kondratiev 95f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 96f9e3033fSDedy Lansky static inline int wil_vring_avail_low(struct vring *vring) 97f9e3033fSDedy Lansky { 98f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring); 99f9e3033fSDedy Lansky } 100f9e3033fSDedy Lansky 101f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 102f9e3033fSDedy Lansky static inline int wil_vring_avail_high(struct vring *vring) 103f9e3033fSDedy Lansky { 104f9e3033fSDedy Lansky return wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring); 105f9e3033fSDedy Lansky } 106f9e3033fSDedy Lansky 1070436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 1080436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 1090436fd9aSVladimir Shulman { 1100436fd9aSVladimir Shulman return val >= min && val < max; 1110436fd9aSVladimir Shulman } 1120436fd9aSVladimir Shulman 1132be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 1142be7d22fSVladimir Kondratiev { 1152be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1162be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1172be7d22fSVladimir Kondratiev uint i; 1182be7d22fSVladimir Kondratiev 119af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1209cf10d62SVladimir Kondratiev 1212be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1222be7d22fSVladimir Kondratiev 1232be7d22fSVladimir Kondratiev vring->swhead = 0; 1242be7d22fSVladimir Kondratiev vring->swtail = 0; 125f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1262be7d22fSVladimir Kondratiev if (!vring->ctx) { 1272be7d22fSVladimir Kondratiev vring->va = NULL; 1282be7d22fSVladimir Kondratiev return -ENOMEM; 1292be7d22fSVladimir Kondratiev } 130f2de576dSHamad Kadmany 1310436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 132f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 133f2de576dSHamad Kadmany * 134f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 135f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 136f2de576dSHamad Kadmany * if we are using 48 bit addresses switch to 32 bit allocation 137f2de576dSHamad Kadmany * before allocating vring memory. 138f2de576dSHamad Kadmany * 139f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 140f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 141f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1422be7d22fSVladimir Kondratiev */ 143f2de576dSHamad Kadmany if (wil->use_extended_dma_addr) 144f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 145f2de576dSHamad Kadmany 1462be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1472be7d22fSVladimir Kondratiev if (!vring->va) { 1482be7d22fSVladimir Kondratiev kfree(vring->ctx); 1492be7d22fSVladimir Kondratiev vring->ctx = NULL; 1502be7d22fSVladimir Kondratiev return -ENOMEM; 1512be7d22fSVladimir Kondratiev } 152f2de576dSHamad Kadmany 153f2de576dSHamad Kadmany if (wil->use_extended_dma_addr) 154f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(48)); 155f2de576dSHamad Kadmany 1562be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1572be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1582be7d22fSVladimir Kondratiev * we can use any 1592be7d22fSVladimir Kondratiev */ 1602be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 1618fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 1628fe59627SVladimir Kondratiev 16368ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1642be7d22fSVladimir Kondratiev } 1652be7d22fSVladimir Kondratiev 16639c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 16739c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1682be7d22fSVladimir Kondratiev 1692be7d22fSVladimir Kondratiev return 0; 1702be7d22fSVladimir Kondratiev } 1712be7d22fSVladimir Kondratiev 1722232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1732232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1742232abd5SVladimir Kondratiev { 1752232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1762232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1778fe59627SVladimir Kondratiev 1782232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1792232abd5SVladimir Kondratiev case wil_mapped_as_single: 1802232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1812232abd5SVladimir Kondratiev break; 1822232abd5SVladimir Kondratiev case wil_mapped_as_page: 1832232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1842232abd5SVladimir Kondratiev break; 1852232abd5SVladimir Kondratiev default: 1862232abd5SVladimir Kondratiev break; 1872232abd5SVladimir Kondratiev } 1882232abd5SVladimir Kondratiev } 1892232abd5SVladimir Kondratiev 1902be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 1912be7d22fSVladimir Kondratiev int tx) 1922be7d22fSVladimir Kondratiev { 1932be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1942be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1952be7d22fSVladimir Kondratiev 1969b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 197ef77285fSVladimir Kondratiev if (tx) { 198ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 199ef77285fSVladimir Kondratiev 200ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 201ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 202ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 203ef77285fSVladimir Kondratiev } else { 204ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 205ef77285fSVladimir Kondratiev vring->size, vring->va, 206ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 207ef77285fSVladimir Kondratiev } 208ef77285fSVladimir Kondratiev 2092be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 21068ada71eSVladimir Kondratiev dma_addr_t pa; 2117e594444SVladimir Kondratiev u16 dmalen; 212f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 21368ada71eSVladimir Kondratiev 2142be7d22fSVladimir Kondratiev if (tx) { 21568ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21668ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 2172be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 21868ada71eSVladimir Kondratiev 219f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 22034b8886eSMaya Erez if (!ctx) { 22134b8886eSMaya Erez wil_dbg_txrx(wil, 22234b8886eSMaya Erez "ctx(%d) was already completed\n", 22334b8886eSMaya Erez vring->swtail); 22434b8886eSMaya Erez vring->swtail = wil_vring_next_tail(vring); 22534b8886eSMaya Erez continue; 22634b8886eSMaya Erez } 22768ada71eSVladimir Kondratiev *d = *_d; 2282232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 229f88f113aSVladimir Kondratiev if (ctx->skb) 230f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 2312be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2322be7d22fSVladimir Kondratiev } else { /* rx */ 23368ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 23468ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 2354d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 23668ada71eSVladimir Kondratiev 237f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 23868ada71eSVladimir Kondratiev *d = *_d; 23968ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2407e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2417e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 242f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2432be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2442be7d22fSVladimir Kondratiev } 2452be7d22fSVladimir Kondratiev } 2462be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2472be7d22fSVladimir Kondratiev kfree(vring->ctx); 2482be7d22fSVladimir Kondratiev vring->pa = 0; 2492be7d22fSVladimir Kondratiev vring->va = NULL; 2502be7d22fSVladimir Kondratiev vring->ctx = NULL; 2512be7d22fSVladimir Kondratiev } 2522be7d22fSVladimir Kondratiev 2532be7d22fSVladimir Kondratiev /** 2542be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2552be7d22fSVladimir Kondratiev * 2562be7d22fSVladimir Kondratiev * Safe to call from IRQ 2572be7d22fSVladimir Kondratiev */ 2582be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 2592be7d22fSVladimir Kondratiev u32 i, int headroom) 2602be7d22fSVladimir Kondratiev { 2612be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 26252a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 26368ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 2648fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 2652be7d22fSVladimir Kondratiev dma_addr_t pa; 2662be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2678fe59627SVladimir Kondratiev 2682be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2692be7d22fSVladimir Kondratiev return -ENOMEM; 2702be7d22fSVladimir Kondratiev 2712be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2722be7d22fSVladimir Kondratiev skb_put(skb, sz); 2732be7d22fSVladimir Kondratiev 2742be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2752be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2762be7d22fSVladimir Kondratiev kfree_skb(skb); 2772be7d22fSVladimir Kondratiev return -ENOMEM; 2782be7d22fSVladimir Kondratiev } 2792be7d22fSVladimir Kondratiev 28048c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 28168ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2822be7d22fSVladimir Kondratiev /* ip_length don't care */ 2832be7d22fSVladimir Kondratiev /* b11 don't care */ 2842be7d22fSVladimir Kondratiev /* error don't care */ 2852be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2867e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 28768ada71eSVladimir Kondratiev *_d = *d; 288f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2892be7d22fSVladimir Kondratiev 2902be7d22fSVladimir Kondratiev return 0; 2912be7d22fSVladimir Kondratiev } 2922be7d22fSVladimir Kondratiev 2932be7d22fSVladimir Kondratiev /** 2942be7d22fSVladimir Kondratiev * Adds radiotap header 2952be7d22fSVladimir Kondratiev * 2962be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 2972be7d22fSVladimir Kondratiev * 2982be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 2992be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3002be7d22fSVladimir Kondratiev * - Phy info 3012be7d22fSVladimir Kondratiev */ 3022be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 30333e61169SVladimir Kondratiev struct sk_buff *skb) 3042be7d22fSVladimir Kondratiev { 3052be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 3062be7d22fSVladimir Kondratiev struct wil6210_rtap { 3072be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3082be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3092be7d22fSVladimir Kondratiev /* flags */ 3102be7d22fSVladimir Kondratiev u8 flags; 3112be7d22fSVladimir Kondratiev /* channel */ 3122be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3132be7d22fSVladimir Kondratiev __le16 chnl_flags; 3142be7d22fSVladimir Kondratiev /* MCS */ 3152be7d22fSVladimir Kondratiev u8 mcs_present; 3162be7d22fSVladimir Kondratiev u8 mcs_flags; 3172be7d22fSVladimir Kondratiev u8 mcs_index; 3182be7d22fSVladimir Kondratiev } __packed; 3192be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3202be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3212be7d22fSVladimir Kondratiev /* vendor */ 3222be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3232be7d22fSVladimir Kondratiev u8 vendor_ns; 3242be7d22fSVladimir Kondratiev __le16 vendor_skip; 3252be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3262be7d22fSVladimir Kondratiev } __packed; 32733e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3282be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3292be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3302be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3312be7d22fSVladimir Kondratiev static char phy_data[128]; 3322be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 3332be7d22fSVladimir Kondratiev 3342be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3352be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3362be7d22fSVladimir Kondratiev /* calculate additional length */ 3372be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3382be7d22fSVladimir Kondratiev /** 3392be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3402be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3412be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3422be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3432be7d22fSVladimir Kondratiev */ 3442be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3452be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3468fe59627SVladimir Kondratiev 3472be7d22fSVladimir Kondratiev if (len > 8) { 3482be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3492be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3508fe59627SVladimir Kondratiev 3512be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3522be7d22fSVladimir Kondratiev phy_length = len - 8; 3532be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3542be7d22fSVladimir Kondratiev } 3552be7d22fSVladimir Kondratiev } 3562be7d22fSVladimir Kondratiev } 3572be7d22fSVladimir Kondratiev rtap_len += phy_length; 3582be7d22fSVladimir Kondratiev } 3592be7d22fSVladimir Kondratiev 3602be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3612be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3629165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3632be7d22fSVladimir Kondratiev return; 3642be7d22fSVladimir Kondratiev } 3652be7d22fSVladimir Kondratiev 3662be7d22fSVladimir Kondratiev rtap_vendor = (void *)skb_push(skb, rtap_len); 3672be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3682be7d22fSVladimir Kondratiev 3692be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3702be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3712be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3722be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3732be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3742be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3752be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3762be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3772be7d22fSVladimir Kondratiev 3782be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3792be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3802be7d22fSVladimir Kondratiev 3812be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3822be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3832be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3842be7d22fSVladimir Kondratiev 3852be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3862be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3872be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3882be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3892be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3902be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3912be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 3922be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 3932be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 3942be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 3952be7d22fSVladimir Kondratiev phy_length); 3962be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 3972be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 3982be7d22fSVladimir Kondratiev phy_length); 3992be7d22fSVladimir Kondratiev } 4002be7d22fSVladimir Kondratiev } 4012be7d22fSVladimir Kondratiev 402a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 403a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 404a8313341SVladimir Kondratiev { 405a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 406a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 407a8313341SVladimir Kondratiev } 408a8313341SVladimir Kondratiev 4092be7d22fSVladimir Kondratiev /** 4102be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4112be7d22fSVladimir Kondratiev * 41233e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 41333e61169SVladimir Kondratiev * 4142be7d22fSVladimir Kondratiev * Safe to call from IRQ 4152be7d22fSVladimir Kondratiev */ 4162be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 4172be7d22fSVladimir Kondratiev struct vring *vring) 4182be7d22fSVladimir Kondratiev { 4192be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4202be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 42168ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 42268ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4232be7d22fSVladimir Kondratiev struct sk_buff *skb; 4242be7d22fSVladimir Kondratiev dma_addr_t pa; 425c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 42652a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4277e594444SVladimir Kondratiev u16 dmalen; 4282be7d22fSVladimir Kondratiev u8 ftype; 429c8b78b5fSVladimir Kondratiev int cid; 4303b282bc6SVladimir Kondratiev int i; 431c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 432c8b78b5fSVladimir Kondratiev 43333e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 43433e61169SVladimir Kondratiev 4353b282bc6SVladimir Kondratiev again: 43633c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 4372be7d22fSVladimir Kondratiev return NULL; 4382be7d22fSVladimir Kondratiev 4393b282bc6SVladimir Kondratiev i = (int)vring->swhead; 440148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 44133c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4422be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4432be7d22fSVladimir Kondratiev return NULL; 4442be7d22fSVladimir Kondratiev } 4452be7d22fSVladimir Kondratiev 446148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 447148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 448148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 449148416a9SVladimir Kondratiev if (!skb) { 450148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4513b282bc6SVladimir Kondratiev goto again; 452148416a9SVladimir Kondratiev } 45368ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 45468ada71eSVladimir Kondratiev *d = *_d; 45568ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 45668ada71eSVladimir Kondratiev 45768ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 45868ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 45968ada71eSVladimir Kondratiev 460148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 461148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 462a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 46368ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 46468ada71eSVladimir Kondratiev 4653b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4663b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4673b282bc6SVladimir Kondratiev 46833c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 469e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4703b282bc6SVladimir Kondratiev stats->rx_large_frame++; 471110dea00SWei Yongjun kfree_skb(skb); 4723b282bc6SVladimir Kondratiev goto again; 473e270045bSVladimir Kondratiev } 4747e594444SVladimir Kondratiev skb_trim(skb, dmalen); 47533e61169SVladimir Kondratiev 4761cbbcb08SVladimir Kondratiev prefetch(skb->data); 4771cbbcb08SVladimir Kondratiev 478c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 479c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 480c0d37713SVladimir Kondratiev 481c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 482c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 483c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4842be7d22fSVladimir Kondratiev 4852be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4862be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 48733e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4882be7d22fSVladimir Kondratiev 4892be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4902be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4912be7d22fSVladimir Kondratiev return skb; 492a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4932be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4942be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4952be7d22fSVladimir Kondratiev */ 49668ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 49733c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 498a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 499a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 500a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 501a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 502a8313341SVladimir Kondratiev 503a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 504a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 505a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5063b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 507a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 508a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 509a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 510a8313341SVladimir Kondratiev mid, cid, tid, seq); 511a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 512a8313341SVladimir Kondratiev } else { 513a8313341SVladimir Kondratiev /* print again all info. One can enable only this 514a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 515a8313341SVladimir Kondratiev */ 516a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 517a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 518a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 519a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 520a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 521a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 522a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 523a8313341SVladimir Kondratiev } 5242be7d22fSVladimir Kondratiev kfree_skb(skb); 5253b282bc6SVladimir Kondratiev goto again; 5262be7d22fSVladimir Kondratiev } 5272be7d22fSVladimir Kondratiev 528c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5292be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5303b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5312be7d22fSVladimir Kondratiev kfree_skb(skb); 5323b282bc6SVladimir Kondratiev goto again; 5332be7d22fSVladimir Kondratiev } 5342be7d22fSVladimir Kondratiev 535504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 536504937d4SKirshenbaum Erez * and in case of error drop the packet 537504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 538504937d4SKirshenbaum Erez */ 53933c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 540504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 54133c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 542504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5434a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5444a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5454a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5464a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5474a68ab10SVladimir Kondratiev */ 548504937d4SKirshenbaum Erez } 549504937d4SKirshenbaum Erez 550c406ea7cSVladimir Kondratiev if (snaplen) { 551c406ea7cSVladimir Kondratiev /* Packet layout 552c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 553c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 554c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 555c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 556c406ea7cSVladimir Kondratiev */ 557c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 558c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 559c406ea7cSVladimir Kondratiev } 560c406ea7cSVladimir Kondratiev 5612be7d22fSVladimir Kondratiev return skb; 5622be7d22fSVladimir Kondratiev } 5632be7d22fSVladimir Kondratiev 5642be7d22fSVladimir Kondratiev /** 5652be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5662be7d22fSVladimir Kondratiev * buffers posted at @swtail 5672be7d22fSVladimir Kondratiev */ 5682be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5692be7d22fSVladimir Kondratiev { 5702be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 5712be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 5722be7d22fSVladimir Kondratiev u32 next_tail; 5732be7d22fSVladimir Kondratiev int rc = 0; 5742be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5752be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5762be7d22fSVladimir Kondratiev 5772be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5782be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5792be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5802be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 58133c477fdSVladimir Kondratiev if (unlikely(rc)) { 5822be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5832be7d22fSVladimir Kondratiev rc, v->swtail); 5842be7d22fSVladimir Kondratiev break; 5852be7d22fSVladimir Kondratiev } 5862be7d22fSVladimir Kondratiev } 587ab6d7cc3SMaya Erez 588ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 589ab6d7cc3SMaya Erez * committing them to HW 590ab6d7cc3SMaya Erez */ 591ab6d7cc3SMaya Erez wmb(); 592ab6d7cc3SMaya Erez 593b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5942be7d22fSVladimir Kondratiev 5952be7d22fSVladimir Kondratiev return rc; 5962be7d22fSVladimir Kondratiev } 5972be7d22fSVladimir Kondratiev 59858527421SVladimir Kondratiev /** 59958527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 60058527421SVladimir Kondratiev * @cs: One area of memory 60158527421SVladimir Kondratiev * @ct: Another area of memory 60258527421SVladimir Kondratiev * @count: The size of the area. 60358527421SVladimir Kondratiev * 60458527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 60558527421SVladimir Kondratiev * with minimal modifications 60658527421SVladimir Kondratiev */ 60758527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 60858527421SVladimir Kondratiev { 60958527421SVladimir Kondratiev const unsigned char *su1, *su2; 61058527421SVladimir Kondratiev int res = 0; 61158527421SVladimir Kondratiev 61258527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 61358527421SVladimir Kondratiev --su1, --su2, count--) { 61458527421SVladimir Kondratiev res = *su1 - *su2; 61558527421SVladimir Kondratiev if (res) 61658527421SVladimir Kondratiev break; 61758527421SVladimir Kondratiev } 61858527421SVladimir Kondratiev return res; 61958527421SVladimir Kondratiev } 62058527421SVladimir Kondratiev 62158527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 62258527421SVladimir Kondratiev { 62358527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 62458527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 62558527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 62658527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 62758527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 62858527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 62958527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 63058527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 63158527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 63258527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 63358527421SVladimir Kondratiev 63458527421SVladimir Kondratiev if (!cc->key_set) { 63558527421SVladimir Kondratiev wil_err_ratelimited(wil, 63658527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 63758527421SVladimir Kondratiev cid, tid, mc, key_id); 63858527421SVladimir Kondratiev return -EINVAL; 63958527421SVladimir Kondratiev } 64058527421SVladimir Kondratiev 64158527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 64258527421SVladimir Kondratiev wil_err_ratelimited(wil, 64358527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 64458527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 64558527421SVladimir Kondratiev return -EINVAL; 64658527421SVladimir Kondratiev } 64758527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 64858527421SVladimir Kondratiev 64958527421SVladimir Kondratiev return 0; 65058527421SVladimir Kondratiev } 65158527421SVladimir Kondratiev 6522be7d22fSVladimir Kondratiev /* 6532be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 654e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6552be7d22fSVladimir Kondratiev */ 656b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6572be7d22fSVladimir Kondratiev { 658c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 659c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 660c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 6612be7d22fSVladimir Kondratiev unsigned int len = skb->len; 662c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 66341d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 66458527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 665c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 666c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 667c42da999SVladimir Kondratiev * is not suitable, need to look at data 668c42da999SVladimir Kondratiev */ 669c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 670c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 671c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 672c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 673c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 674c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 675c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 676c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 677c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 678c42da999SVladimir Kondratiev }; 6792be7d22fSVladimir Kondratiev 6800553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 6810553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 6820553640dSVladimir Shulman * set hash to any non-zero value to activate rps 6830553640dSVladimir Shulman * mechanism, core will be chosen according 6840553640dSVladimir Shulman * to user-level rps configuration. 6850553640dSVladimir Shulman */ 6860553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 6870553640dSVladimir Shulman 688241804cbSVladimir Kondratiev skb_orphan(skb); 689241804cbSVladimir Kondratiev 69058527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 69158527421SVladimir Kondratiev rc = GRO_DROP; 69258527421SVladimir Kondratiev dev_kfree_skb(skb); 69358527421SVladimir Kondratiev stats->rx_replay++; 69458527421SVladimir Kondratiev goto stats; 69558527421SVladimir Kondratiev } 69658527421SVladimir Kondratiev 69702beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 698c42da999SVladimir Kondratiev if (mcast) { 699c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 700c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 701c42da999SVladimir Kondratiev */ 702c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 703c42da999SVladimir Kondratiev } else { 704c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 7052be7d22fSVladimir Kondratiev 706c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 707c42da999SVladimir Kondratiev /* The destination station is associated to 708c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 709c42da999SVladimir Kondratiev * directly to it and do not pass it to local 710c42da999SVladimir Kondratiev * net stack. 711c42da999SVladimir Kondratiev */ 712c42da999SVladimir Kondratiev xmit_skb = skb; 713c42da999SVladimir Kondratiev skb = NULL; 714c42da999SVladimir Kondratiev } 715c42da999SVladimir Kondratiev } 716c42da999SVladimir Kondratiev } 717c42da999SVladimir Kondratiev if (xmit_skb) { 718c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 719c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 720c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 721c42da999SVladimir Kondratiev */ 722c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 723c42da999SVladimir Kondratiev xmit_skb->priority += 256; 724c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 725c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 726c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 727c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 728c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 729c42da999SVladimir Kondratiev } 730c42da999SVladimir Kondratiev 731c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 732c42da999SVladimir Kondratiev 733c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 734c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 735c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 736c42da999SVladimir Kondratiev len, gro_res_str[rc]); 737c42da999SVladimir Kondratiev } 73858527421SVladimir Kondratiev stats: 739c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 740b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 741b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 742b5998e6aSVladimir Kondratiev stats->rx_dropped++; 743b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 744b5998e6aSVladimir Kondratiev } else { 7452be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 746c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7472be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 748c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 749c42da999SVladimir Kondratiev if (mcast) 750c42da999SVladimir Kondratiev ndev->stats.multicast++; 751194b482bSVladimir Kondratiev } 7522be7d22fSVladimir Kondratiev } 7532be7d22fSVladimir Kondratiev 7542be7d22fSVladimir Kondratiev /** 7552be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7562be7d22fSVladimir Kondratiev * 757e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7582be7d22fSVladimir Kondratiev */ 759e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7602be7d22fSVladimir Kondratiev { 7612be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 7622be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 7632be7d22fSVladimir Kondratiev struct sk_buff *skb; 7642be7d22fSVladimir Kondratiev 76533c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7662be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7672be7d22fSVladimir Kondratiev return; 7682be7d22fSVladimir Kondratiev } 769af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 770e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 771e0287c4aSVladimir Kondratiev (*quota)--; 7722be7d22fSVladimir Kondratiev 7732be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 7742be7d22fSVladimir Kondratiev skb->dev = ndev; 7752be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7762be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7772be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7782be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 779b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7802be7d22fSVladimir Kondratiev } else { 781b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 7822be7d22fSVladimir Kondratiev } 7832be7d22fSVladimir Kondratiev } 7842be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 7852be7d22fSVladimir Kondratiev } 7862be7d22fSVladimir Kondratiev 78752a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 78852a45702SLior David { 78952a45702SLior David wil->rx_buf_len = rx_large_buf ? 79052a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 79152a45702SLior David if (mtu_max > wil->rx_buf_len) { 79252a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 79352a45702SLior David * backward compatibility (mtu_max parameter was also used 79452a45702SLior David * to support receiving large packets) 79552a45702SLior David */ 79652a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 79752a45702SLior David wil->rx_buf_len = mtu_max; 79852a45702SLior David } 79952a45702SLior David } 80052a45702SLior David 801d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 8022be7d22fSVladimir Kondratiev { 8032be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8042be7d22fSVladimir Kondratiev int rc; 8052be7d22fSVladimir Kondratiev 806af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8079cf10d62SVladimir Kondratiev 8088bf6adb9SVladimir Kondratiev if (vring->va) { 8098bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8108bf6adb9SVladimir Kondratiev return -EINVAL; 8118bf6adb9SVladimir Kondratiev } 8128bf6adb9SVladimir Kondratiev 81352a45702SLior David wil_rx_buf_len_init(wil); 81452a45702SLior David 815d3762b40SVladimir Kondratiev vring->size = size; 8162be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8172be7d22fSVladimir Kondratiev if (rc) 8182be7d22fSVladimir Kondratiev return rc; 8192be7d22fSVladimir Kondratiev 82047e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8212be7d22fSVladimir Kondratiev if (rc) 8222be7d22fSVladimir Kondratiev goto err_free; 8232be7d22fSVladimir Kondratiev 8242be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8252be7d22fSVladimir Kondratiev if (rc) 8262be7d22fSVladimir Kondratiev goto err_free; 8272be7d22fSVladimir Kondratiev 8282be7d22fSVladimir Kondratiev return 0; 8292be7d22fSVladimir Kondratiev err_free: 8302be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8312be7d22fSVladimir Kondratiev 8322be7d22fSVladimir Kondratiev return rc; 8332be7d22fSVladimir Kondratiev } 8342be7d22fSVladimir Kondratiev 8352be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 8362be7d22fSVladimir Kondratiev { 8372be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 8382be7d22fSVladimir Kondratiev 839af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8409cf10d62SVladimir Kondratiev 8412acb4220SVladimir Kondratiev if (vring->va) 8422be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8432be7d22fSVladimir Kondratiev } 8442be7d22fSVladimir Kondratiev 845875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 846875e9439SMaya Erez { 847875e9439SMaya Erez spin_lock_bh(&txdata->lock); 848875e9439SMaya Erez txdata->dot1x_open = 0; 849875e9439SMaya Erez txdata->enabled = 0; 850875e9439SMaya Erez txdata->idle = 0; 851875e9439SMaya Erez txdata->last_idle = 0; 852875e9439SMaya Erez txdata->begin = 0; 853875e9439SMaya Erez txdata->agg_wsize = 0; 854875e9439SMaya Erez txdata->agg_timeout = 0; 855875e9439SMaya Erez txdata->agg_amsdu = 0; 856875e9439SMaya Erez txdata->addba_in_progress = false; 857875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 858875e9439SMaya Erez } 859875e9439SMaya Erez 8602be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 8612be7d22fSVladimir Kondratiev int cid, int tid) 8622be7d22fSVladimir Kondratiev { 8632be7d22fSVladimir Kondratiev int rc; 8642be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 8652be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 8662be7d22fSVladimir Kondratiev .vring_cfg = { 8672be7d22fSVladimir Kondratiev .tx_sw_ring = { 8689a06bec9SVladimir Kondratiev .max_mpdu_size = 869c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 870b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 8712be7d22fSVladimir Kondratiev }, 8722be7d22fSVladimir Kondratiev .ringid = id, 873a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 8742be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 8752be7d22fSVladimir Kondratiev .mac_ctrl = 0, 8762be7d22fSVladimir Kondratiev .to_resolution = 0, 8773277213fSVladimir Kondratiev .agg_max_wsize = 0, 8782be7d22fSVladimir Kondratiev .schd_params = { 8792be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 8802be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 8812be7d22fSVladimir Kondratiev }, 8822be7d22fSVladimir Kondratiev }, 8832be7d22fSVladimir Kondratiev }; 8842be7d22fSVladimir Kondratiev struct { 885b874ddecSLior David struct wmi_cmd_hdr wmi; 8862be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 8872be7d22fSVladimir Kondratiev } __packed reply; 8882be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 889097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8902be7d22fSVladimir Kondratiev 891af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 892e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8939b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 8949cf10d62SVladimir Kondratiev 8952be7d22fSVladimir Kondratiev if (vring->va) { 8962be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 8972be7d22fSVladimir Kondratiev rc = -EINVAL; 8982be7d22fSVladimir Kondratiev goto out; 8992be7d22fSVladimir Kondratiev } 9002be7d22fSVladimir Kondratiev 901875e9439SMaya Erez wil_tx_data_init(txdata); 9022be7d22fSVladimir Kondratiev vring->size = size; 9032be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9042be7d22fSVladimir Kondratiev if (rc) 9052be7d22fSVladimir Kondratiev goto out; 9062be7d22fSVladimir Kondratiev 90793ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 90893ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 90993ae6d49SVladimir Kondratiev 9102be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9112be7d22fSVladimir Kondratiev 912230d8442SVladimir Kondratiev if (!wil->privacy) 913230d8442SVladimir Kondratiev txdata->dot1x_open = true; 9142be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 9152be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9162be7d22fSVladimir Kondratiev if (rc) 9172be7d22fSVladimir Kondratiev goto out_free; 9182be7d22fSVladimir Kondratiev 919b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9202be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9212be7d22fSVladimir Kondratiev reply.cmd.status); 922c331997bSVladimir Kondratiev rc = -EINVAL; 9232be7d22fSVladimir Kondratiev goto out_free; 9242be7d22fSVladimir Kondratiev } 9252be7d22fSVladimir Kondratiev 926dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 927dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 928097638a0SVladimir Kondratiev txdata->enabled = 1; 929dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 930dc90506fSMaya Erez 931230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9323a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 933097638a0SVladimir Kondratiev 9342be7d22fSVladimir Kondratiev return 0; 9352be7d22fSVladimir Kondratiev out_free: 936875e9439SMaya Erez spin_lock_bh(&txdata->lock); 937230d8442SVladimir Kondratiev txdata->dot1x_open = false; 938230d8442SVladimir Kondratiev txdata->enabled = 0; 939875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 9402be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9410916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 9420916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 9430916d9f2SMaya Erez 9442be7d22fSVladimir Kondratiev out: 9452be7d22fSVladimir Kondratiev 9462be7d22fSVladimir Kondratiev return rc; 9472be7d22fSVladimir Kondratiev } 9482be7d22fSVladimir Kondratiev 94941d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 95041d6b093SVladimir Kondratiev { 95141d6b093SVladimir Kondratiev int rc; 95241d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 95341d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 95441d6b093SVladimir Kondratiev .vring_cfg = { 95541d6b093SVladimir Kondratiev .tx_sw_ring = { 95641d6b093SVladimir Kondratiev .max_mpdu_size = 95741d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 95841d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 95941d6b093SVladimir Kondratiev }, 96041d6b093SVladimir Kondratiev .ringid = id, 96141d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 96241d6b093SVladimir Kondratiev }, 96341d6b093SVladimir Kondratiev }; 96441d6b093SVladimir Kondratiev struct { 965b874ddecSLior David struct wmi_cmd_hdr wmi; 96641d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 96741d6b093SVladimir Kondratiev } __packed reply; 96841d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 96941d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 97041d6b093SVladimir Kondratiev 971af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 97241d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9739b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 97441d6b093SVladimir Kondratiev 97541d6b093SVladimir Kondratiev if (vring->va) { 97641d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 97741d6b093SVladimir Kondratiev rc = -EINVAL; 97841d6b093SVladimir Kondratiev goto out; 97941d6b093SVladimir Kondratiev } 98041d6b093SVladimir Kondratiev 981875e9439SMaya Erez wil_tx_data_init(txdata); 98241d6b093SVladimir Kondratiev vring->size = size; 98341d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 98441d6b093SVladimir Kondratiev if (rc) 98541d6b093SVladimir Kondratiev goto out; 98641d6b093SVladimir Kondratiev 98741d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 98841d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 98941d6b093SVladimir Kondratiev 99041d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 99141d6b093SVladimir Kondratiev 992230d8442SVladimir Kondratiev if (!wil->privacy) 993230d8442SVladimir Kondratiev txdata->dot1x_open = true; 99441d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 99541d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 99641d6b093SVladimir Kondratiev if (rc) 99741d6b093SVladimir Kondratiev goto out_free; 99841d6b093SVladimir Kondratiev 99941d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 100041d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 100141d6b093SVladimir Kondratiev reply.cmd.status); 100241d6b093SVladimir Kondratiev rc = -EINVAL; 100341d6b093SVladimir Kondratiev goto out_free; 100441d6b093SVladimir Kondratiev } 100541d6b093SVladimir Kondratiev 1006dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1007dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 100841d6b093SVladimir Kondratiev txdata->enabled = 1; 1009dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 101041d6b093SVladimir Kondratiev 101141d6b093SVladimir Kondratiev return 0; 101241d6b093SVladimir Kondratiev out_free: 1013875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1014230d8442SVladimir Kondratiev txdata->enabled = 0; 1015230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1016875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 101741d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 101841d6b093SVladimir Kondratiev out: 101941d6b093SVladimir Kondratiev 102041d6b093SVladimir Kondratiev return rc; 102141d6b093SVladimir Kondratiev } 102241d6b093SVladimir Kondratiev 10232be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 10242be7d22fSVladimir Kondratiev { 10252be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 10263a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 10272be7d22fSVladimir Kondratiev 10289b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1029097638a0SVladimir Kondratiev 10302be7d22fSVladimir Kondratiev if (!vring->va) 10312be7d22fSVladimir Kondratiev return; 10322be7d22fSVladimir Kondratiev 1033af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 10349cf10d62SVladimir Kondratiev 10355933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1036230d8442SVladimir Kondratiev txdata->dot1x_open = false; 10375933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 10385933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 103934b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 104034b8886eSMaya Erez * not prevent the next NAPI run. 104134b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 104234b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 104334b8886eSMaya Erez * handle this vring 104434b8886eSMaya Erez */ 104534b8886eSMaya Erez wmb(); 1046097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 10479419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1048097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1049097638a0SVladimir Kondratiev 10502be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 10512be7d22fSVladimir Kondratiev } 10522be7d22fSVladimir Kondratiev 105341d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 10542be7d22fSVladimir Kondratiev struct sk_buff *skb) 10552be7d22fSVladimir Kondratiev { 10563df2cd36SVladimir Kondratiev int i; 10573df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 10583df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 10592be7d22fSVladimir Kondratiev 10603df2cd36SVladimir Kondratiev if (cid < 0) 10613df2cd36SVladimir Kondratiev return NULL; 10623df2cd36SVladimir Kondratiev 10633df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 10643df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 1065230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1066230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1067230d8442SVladimir Kondratiev continue; 10683df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 10693df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 1070b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 10718fe59627SVladimir Kondratiev 1072af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1073af3db60aSLazar Alexei eth->h_dest, i); 1074b729aaf0SMaya Erez if (v->va && txdata->enabled) { 10752be7d22fSVladimir Kondratiev return v; 10763df2cd36SVladimir Kondratiev } else { 1077af3db60aSLazar Alexei wil_dbg_txrx(wil, 1078af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1079af3db60aSLazar Alexei i); 10803df2cd36SVladimir Kondratiev return NULL; 10813df2cd36SVladimir Kondratiev } 10823df2cd36SVladimir Kondratiev } 10833df2cd36SVladimir Kondratiev } 10842be7d22fSVladimir Kondratiev 10852be7d22fSVladimir Kondratiev return NULL; 10862be7d22fSVladimir Kondratiev } 10872be7d22fSVladimir Kondratiev 1088fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1089fb3cac57SVladimir Kondratiev struct sk_buff *skb); 109054ed90a8SVladimir Kondratiev 109154ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 109254ed90a8SVladimir Kondratiev struct sk_buff *skb) 109354ed90a8SVladimir Kondratiev { 109454ed90a8SVladimir Kondratiev struct vring *v; 109554ed90a8SVladimir Kondratiev int i; 109654ed90a8SVladimir Kondratiev u8 cid; 1097b729aaf0SMaya Erez struct vring_tx_data *txdata; 109854ed90a8SVladimir Kondratiev 109954ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 110054ed90a8SVladimir Kondratiev * for the AP we connected to. 1101230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 110254ed90a8SVladimir Kondratiev */ 110354ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 110454ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1105b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1106b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 110754ed90a8SVladimir Kondratiev continue; 110854ed90a8SVladimir Kondratiev 110954ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 111041d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 111141d6b093SVladimir Kondratiev continue; 111241d6b093SVladimir Kondratiev 1113230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 111454ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1115230d8442SVladimir Kondratiev continue; 111654ed90a8SVladimir Kondratiev 111754ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 111854ed90a8SVladimir Kondratiev 111954ed90a8SVladimir Kondratiev return v; 112054ed90a8SVladimir Kondratiev } 112154ed90a8SVladimir Kondratiev 112254ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 112354ed90a8SVladimir Kondratiev 112454ed90a8SVladimir Kondratiev return NULL; 112554ed90a8SVladimir Kondratiev } 112654ed90a8SVladimir Kondratiev 112770812421SVladimir Kondratiev /* Use one of 2 strategies: 112870812421SVladimir Kondratiev * 112970812421SVladimir Kondratiev * 1. New (real broadcast): 113070812421SVladimir Kondratiev * use dedicated broadcast vring 113170812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 113270812421SVladimir Kondratiev * Find 1-st vring and return it; 113370812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 113470812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 113570812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 113670812421SVladimir Kondratiev * - for PBSS 113770812421SVladimir Kondratiev */ 113870812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1139fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1140fb3cac57SVladimir Kondratiev { 114141d6b093SVladimir Kondratiev struct vring *v; 1142b729aaf0SMaya Erez struct vring_tx_data *txdata; 114341d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1144fb3cac57SVladimir Kondratiev 114541d6b093SVladimir Kondratiev if (i < 0) 114641d6b093SVladimir Kondratiev return NULL; 1147fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1148b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1149b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1150fb3cac57SVladimir Kondratiev return NULL; 1151230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1152230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1153230d8442SVladimir Kondratiev return NULL; 1154fb3cac57SVladimir Kondratiev 1155fb3cac57SVladimir Kondratiev return v; 1156fb3cac57SVladimir Kondratiev } 1157fb3cac57SVladimir Kondratiev 115870812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 115970812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 116070812421SVladimir Kondratiev { 116170812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 116270812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 116370812421SVladimir Kondratiev 116470812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 116570812421SVladimir Kondratiev } 116670812421SVladimir Kondratiev 116770812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 116870812421SVladimir Kondratiev struct sk_buff *skb) 116970812421SVladimir Kondratiev { 117070812421SVladimir Kondratiev struct vring *v, *v2; 117170812421SVladimir Kondratiev struct sk_buff *skb2; 117270812421SVladimir Kondratiev int i; 117370812421SVladimir Kondratiev u8 cid; 117470812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 117570812421SVladimir Kondratiev char *src = eth->h_source; 1176b729aaf0SMaya Erez struct vring_tx_data *txdata; 117770812421SVladimir Kondratiev 117870812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 117970812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 118070812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1181b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1182b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 118370812421SVladimir Kondratiev continue; 118470812421SVladimir Kondratiev 118570812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 118670812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 118770812421SVladimir Kondratiev continue; 1188230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1189230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 119070812421SVladimir Kondratiev continue; 119170812421SVladimir Kondratiev 119270812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 119370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 119470812421SVladimir Kondratiev continue; 119570812421SVladimir Kondratiev 119670812421SVladimir Kondratiev goto found; 119770812421SVladimir Kondratiev } 119870812421SVladimir Kondratiev 119970812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 120070812421SVladimir Kondratiev 120170812421SVladimir Kondratiev return NULL; 120270812421SVladimir Kondratiev 120370812421SVladimir Kondratiev found: 120470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 120570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 120670812421SVladimir Kondratiev 120770812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 120870812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 120970812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 121070812421SVladimir Kondratiev if (!v2->va) 121170812421SVladimir Kondratiev continue; 121270812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 121370812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 121470812421SVladimir Kondratiev continue; 1215230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1216230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 121770812421SVladimir Kondratiev continue; 121870812421SVladimir Kondratiev 121970812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 122070812421SVladimir Kondratiev continue; 122170812421SVladimir Kondratiev 122270812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 122370812421SVladimir Kondratiev if (skb2) { 122470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 122570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 122670812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 122770812421SVladimir Kondratiev } else { 122870812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 122970812421SVladimir Kondratiev } 123070812421SVladimir Kondratiev } 123170812421SVladimir Kondratiev 123270812421SVladimir Kondratiev return v; 123370812421SVladimir Kondratiev } 123470812421SVladimir Kondratiev 123599b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 123699b55bd2SKirshenbaum Erez int vring_index) 12372be7d22fSVladimir Kondratiev { 123868ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 12392be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 12402be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 12412be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 12422be7d22fSVladimir Kondratiev d->dma.error = 0; 12432be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 12447e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 124599b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 12462be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 12472be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 12482be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 12492be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 12502be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 12512be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 12522be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 12532be7d22fSVladimir Kondratiev 12542be7d22fSVladimir Kondratiev return 0; 12552be7d22fSVladimir Kondratiev } 12562be7d22fSVladimir Kondratiev 1257c236658fSVladimir Kondratiev static inline 1258c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1259c236658fSVladimir Kondratiev { 12603d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1261c236658fSVladimir Kondratiev } 1262c236658fSVladimir Kondratiev 12633d4bde15SVladimir Kondratiev /** 12643d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12653d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12663d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12673d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 12683d4bde15SVladimir Kondratiev */ 12693d4bde15SVladimir Kondratiev 12703d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 12713d4bde15SVladimir Kondratiev struct sk_buff *skb, 12723d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 12733d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1274504937d4SKirshenbaum Erez { 12753d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 12763d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 12773d4bde15SVladimir Kondratiev 12783d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 12793d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 12803d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 12813d4bde15SVladimir Kondratiev 12823d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 12833d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 12843d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 12853d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 12863d4bde15SVladimir Kondratiev 12873d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 12883d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 12893d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 12903d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 12913d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 12923d4bde15SVladimir Kondratiev } 12933d4bde15SVladimir Kondratiev 12943d4bde15SVladimir Kondratiev /** 12953d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 12963d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12973d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 12983d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 12993d4bde15SVladimir Kondratiev * 13003d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13013d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13023d4bde15SVladimir Kondratiev */ 13033d4bde15SVladimir Kondratiev 13043d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13053d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1306504937d4SKirshenbaum Erez int protocol; 1307504937d4SKirshenbaum Erez 1308504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1309504937d4SKirshenbaum Erez return 0; 1310504937d4SKirshenbaum Erez 1311df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1312df2d08eeSVladimir Kondratiev 1313504937d4SKirshenbaum Erez switch (skb->protocol) { 1314504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1315504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1316df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1317504937d4SKirshenbaum Erez break; 1318504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1319504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1320504937d4SKirshenbaum Erez break; 1321504937d4SKirshenbaum Erez default: 1322504937d4SKirshenbaum Erez return -EINVAL; 1323504937d4SKirshenbaum Erez } 1324504937d4SKirshenbaum Erez 1325504937d4SKirshenbaum Erez switch (protocol) { 1326504937d4SKirshenbaum Erez case IPPROTO_TCP: 1327504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1328504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1329504937d4SKirshenbaum Erez d->dma.d0 |= 1330504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1331504937d4SKirshenbaum Erez break; 1332504937d4SKirshenbaum Erez case IPPROTO_UDP: 1333504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1334504937d4SKirshenbaum Erez d->dma.d0 |= 1335504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1336504937d4SKirshenbaum Erez break; 1337504937d4SKirshenbaum Erez default: 1338504937d4SKirshenbaum Erez return -EINVAL; 1339504937d4SKirshenbaum Erez } 1340504937d4SKirshenbaum Erez 1341504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1342504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1343504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1344504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1345504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1346504937d4SKirshenbaum Erez 1347504937d4SKirshenbaum Erez return 0; 1348504937d4SKirshenbaum Erez } 1349504937d4SKirshenbaum Erez 13503d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13513d4bde15SVladimir Kondratiev { 13523d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13533d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13543d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13553d4bde15SVladimir Kondratiev } 13563d4bde15SVladimir Kondratiev 13573d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13583d4bde15SVladimir Kondratiev { 13593d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13603d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13613d4bde15SVladimir Kondratiev } 13623d4bde15SVladimir Kondratiev 13633d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 13643d4bde15SVladimir Kondratiev struct sk_buff *skb) 13653d4bde15SVladimir Kondratiev { 13663d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13673d4bde15SVladimir Kondratiev 13683d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 13693d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 13703d4bde15SVladimir Kondratiev *_first_desc = NULL; 13713d4bde15SVladimir Kondratiev 13723d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 13733d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 13743d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 13753d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 13763d4bde15SVladimir Kondratiev 13773d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 13783d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 13793d4bde15SVladimir Kondratiev 13803d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 13813d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 13823d4bde15SVladimir Kondratiev 13833d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 13843d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 13853d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 13863d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 13873d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 13883d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 13893d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 13903d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 13913d4bde15SVladimir Kondratiev uint i = swhead; 13923d4bde15SVladimir Kondratiev dma_addr_t pa; 13933d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 13943d4bde15SVladimir Kondratiev int rem_data = mss; 13953d4bde15SVladimir Kondratiev int lenmss; 13963d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 13973d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 13983d4bde15SVladimir Kondratiev bool is_ipv4; 13993d4bde15SVladimir Kondratiev int tcp_hdr_len; 14003d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14013d4bde15SVladimir Kondratiev int gso_type; 1402e3d2ed94SHamad Kadmany int rc = -EINVAL; 14033d4bde15SVladimir Kondratiev 1404af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1405af3db60aSLazar Alexei vring_index); 14063d4bde15SVladimir Kondratiev 14073d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14083d4bde15SVladimir Kondratiev return -EINVAL; 14093d4bde15SVladimir Kondratiev 14103d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14113d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14123d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14133d4bde15SVladimir Kondratiev * this is the initial check only. 14143d4bde15SVladimir Kondratiev */ 14153d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14163d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14173d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14183d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14193d4bde15SVladimir Kondratiev return -ENOMEM; 14203d4bde15SVladimir Kondratiev } 14213d4bde15SVladimir Kondratiev 14223d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14233d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14243d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14253d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14263d4bde15SVladimir Kondratiev 14273d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14283d4bde15SVladimir Kondratiev switch (gso_type) { 14293d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14303d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14313d4bde15SVladimir Kondratiev * as required by the offloading doc 14323d4bde15SVladimir Kondratiev */ 14333d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14343d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14353d4bde15SVladimir Kondratiev is_ipv4 = true; 14363d4bde15SVladimir Kondratiev break; 14373d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14383d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14393d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14403d4bde15SVladimir Kondratiev is_ipv4 = false; 14413d4bde15SVladimir Kondratiev break; 14423d4bde15SVladimir Kondratiev default: 14433d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 14443d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14453d4bde15SVladimir Kondratiev */ 14463d4bde15SVladimir Kondratiev return -EINVAL; 14473d4bde15SVladimir Kondratiev } 14483d4bde15SVladimir Kondratiev 14493d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14503d4bde15SVladimir Kondratiev return -EINVAL; 14513d4bde15SVladimir Kondratiev 14523d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14533d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14543d4bde15SVladimir Kondratiev */ 14553d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14563d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14573d4bde15SVladimir Kondratiev 14583d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 14593d4bde15SVladimir Kondratiev 14603d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14613d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 14623d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 14633d4bde15SVladimir Kondratiev goto err_exit; 14643d4bde15SVladimir Kondratiev } 14653d4bde15SVladimir Kondratiev 14663d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 14673d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 14683d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 14693d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 14703d4bde15SVladimir Kondratiev 14713d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14723d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 14733d4bde15SVladimir Kondratiev 14743d4bde15SVladimir Kondratiev descs_used++; 14753d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 14763d4bde15SVladimir Kondratiev 14773d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 14783d4bde15SVladimir Kondratiev if (headlen) { 14793d4bde15SVladimir Kondratiev len = headlen; 14803d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 14813d4bde15SVladimir Kondratiev len); 14823d4bde15SVladimir Kondratiev } else { 14833d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 14843d4bde15SVladimir Kondratiev len = frag->size; 14853d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 14863d4bde15SVladimir Kondratiev } 14873d4bde15SVladimir Kondratiev 14883d4bde15SVladimir Kondratiev while (len) { 14893d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14903d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 14913d4bde15SVladimir Kondratiev len, rem_data, descs_used); 14923d4bde15SVladimir Kondratiev 14933d4bde15SVladimir Kondratiev if (descs_used == avail) { 1494e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1495e3d2ed94SHamad Kadmany rc = -ENOMEM; 1496e3d2ed94SHamad Kadmany goto mem_error; 14973d4bde15SVladimir Kondratiev } 14983d4bde15SVladimir Kondratiev 14993d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15003d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15013d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15023d4bde15SVladimir Kondratiev 15033d4bde15SVladimir Kondratiev if (!headlen) { 15043d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15053d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15063d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15073d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15083d4bde15SVladimir Kondratiev } else { 15093d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15103d4bde15SVladimir Kondratiev skb->data + 15113d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15123d4bde15SVladimir Kondratiev lenmss, 15133d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15143d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15153d4bde15SVladimir Kondratiev headlen -= lenmss; 15163d4bde15SVladimir Kondratiev } 15173d4bde15SVladimir Kondratiev 1518e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1519e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1520e3d2ed94SHamad Kadmany goto mem_error; 1521e3d2ed94SHamad Kadmany } 15223d4bde15SVladimir Kondratiev 15233d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15243d4bde15SVladimir Kondratiev 15253d4bde15SVladimir Kondratiev if (!_first_desc) { 15263d4bde15SVladimir Kondratiev _first_desc = _desc; 15273d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15283d4bde15SVladimir Kondratiev d = first_desc; 15293d4bde15SVladimir Kondratiev } else { 15303d4bde15SVladimir Kondratiev d = &desc_mem; 15313d4bde15SVladimir Kondratiev } 15323d4bde15SVladimir Kondratiev 15333d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 15343d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15353d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15363d4bde15SVladimir Kondratiev skb_net_hdr_len); 15373d4bde15SVladimir Kondratiev 15383d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15393d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15403d4bde15SVladimir Kondratiev 15413d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15423d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 15433d4bde15SVladimir Kondratiev len -= lenmss; 15443d4bde15SVladimir Kondratiev rem_data -= lenmss; 15453d4bde15SVladimir Kondratiev 15463d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15473d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15483d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15493d4bde15SVladimir Kondratiev 15503d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15513d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15523d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15533d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15543d4bde15SVladimir Kondratiev * release 15553d4bde15SVladimir Kondratiev */ 15563d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15573d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15583d4bde15SVladimir Kondratiev sg_desc_cnt + 15593d4bde15SVladimir Kondratiev 1); 15603d4bde15SVladimir Kondratiev hdr_compensation_need = false; 15613d4bde15SVladimir Kondratiev } else { 15623d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15633d4bde15SVladimir Kondratiev sg_desc_cnt); 15643d4bde15SVladimir Kondratiev } 15653d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 15663d4bde15SVladimir Kondratiev 15673d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 15683d4bde15SVladimir Kondratiev 15693d4bde15SVladimir Kondratiev /* first descriptor may also be the last 15703d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 15713d4bde15SVladimir Kondratiev * it twice 15723d4bde15SVladimir Kondratiev */ 15733d4bde15SVladimir Kondratiev if (first_desc != d) 15743d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 15753d4bde15SVladimir Kondratiev 15763d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 15773d4bde15SVladimir Kondratiev * of this TS processing 15783d4bde15SVladimir Kondratiev */ 15793d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 15803d4bde15SVladimir Kondratiev *_desc = *d; 15813d4bde15SVladimir Kondratiev 15823d4bde15SVladimir Kondratiev rem_data = mss; 15833d4bde15SVladimir Kondratiev _first_desc = NULL; 15843d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 15853d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 15863d4bde15SVladimir Kondratiev *_desc = *d; 15873d4bde15SVladimir Kondratiev } 15883d4bde15SVladimir Kondratiev } 15893d4bde15SVladimir Kondratiev 15903d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 15913d4bde15SVladimir Kondratiev * in this case d pointer is invalid 15923d4bde15SVladimir Kondratiev */ 15933d4bde15SVladimir Kondratiev if (_first_desc == _desc) 15943d4bde15SVladimir Kondratiev d = first_desc; 15953d4bde15SVladimir Kondratiev 15963d4bde15SVladimir Kondratiev /* Last data descriptor */ 15973d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 15983d4bde15SVladimir Kondratiev *_desc = *d; 15993d4bde15SVladimir Kondratiev 16003d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16013d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16023d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16033d4bde15SVladimir Kondratiev 16043d4bde15SVladimir Kondratiev /* hold reference to skb 16053d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16063d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16073d4bde15SVladimir Kondratiev */ 16083d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16093d4bde15SVladimir Kondratiev 16103d4bde15SVladimir Kondratiev /* performance monitoring */ 16113d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 16123d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 16133d4bde15SVladimir Kondratiev used, used + descs_used)) { 16143d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16153d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16163d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16173d4bde15SVladimir Kondratiev } 16183d4bde15SVladimir Kondratiev 1619eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1620eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1621eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1622eb26cff1SMaya Erez * skb before it was completed. 1623eb26cff1SMaya Erez */ 1624eb26cff1SMaya Erez wmb(); 1625eb26cff1SMaya Erez 16263d4bde15SVladimir Kondratiev /* advance swhead */ 16273d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1628e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16293d4bde15SVladimir Kondratiev 16303d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16313d4bde15SVladimir Kondratiev * committing them to HW 16323d4bde15SVladimir Kondratiev */ 16333d4bde15SVladimir Kondratiev wmb(); 16343d4bde15SVladimir Kondratiev 1635b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16363d4bde15SVladimir Kondratiev return 0; 16373d4bde15SVladimir Kondratiev 1638e3d2ed94SHamad Kadmany mem_error: 16393d4bde15SVladimir Kondratiev while (descs_used > 0) { 16403d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16413d4bde15SVladimir Kondratiev 1642a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 16433d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 16443d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 16453d4bde15SVladimir Kondratiev *d = *_desc; 16463d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16473d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16483d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 16493d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16503d4bde15SVladimir Kondratiev descs_used--; 16513d4bde15SVladimir Kondratiev } 16523d4bde15SVladimir Kondratiev err_exit: 1653e3d2ed94SHamad Kadmany return rc; 16543d4bde15SVladimir Kondratiev } 16553d4bde15SVladimir Kondratiev 16565933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16572be7d22fSVladimir Kondratiev struct sk_buff *skb) 16582be7d22fSVladimir Kondratiev { 16592be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 166068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 166168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 16622be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 16632be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 16642be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1665504937d4SKirshenbaum Erez uint f = 0; 16662be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16677c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16682be7d22fSVladimir Kondratiev uint i = swhead; 16692be7d22fSVladimir Kondratiev dma_addr_t pa; 16700436fd9aSVladimir Shulman int used; 167141d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 167241d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 16732be7d22fSVladimir Kondratiev 1674af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring: %d bytes to vring %d\n", skb->len, 1675af3db60aSLazar Alexei vring_index); 16762be7d22fSVladimir Kondratiev 16775933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 16785933a06dSVladimir Kondratiev return -EINVAL; 16795933a06dSVladimir Kondratiev 168033c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 168170801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 16825b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 16835b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 16842be7d22fSVladimir Kondratiev return -ENOMEM; 16852be7d22fSVladimir Kondratiev } 16868fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16872be7d22fSVladimir Kondratiev 16888fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 16892be7d22fSVladimir Kondratiev 16905b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 16915b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 16927743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 16932be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 16942be7d22fSVladimir Kondratiev 16952be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 16962be7d22fSVladimir Kondratiev return -EINVAL; 16972232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16982be7d22fSVladimir Kondratiev /* 1-st segment */ 169941d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 170041d6b093SVladimir Kondratiev if (unlikely(mcast)) { 170141d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1702230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 170341d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 170441d6b093SVladimir Kondratiev } 1705504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17063d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17075b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1708504937d4SKirshenbaum Erez vring_index); 1709504937d4SKirshenbaum Erez goto dma_error; 1710504937d4SKirshenbaum Erez } 1711504937d4SKirshenbaum Erez 1712c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 17133d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 171468ada71eSVladimir Kondratiev 17152be7d22fSVladimir Kondratiev /* middle segments */ 1716504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17172be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17182be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17192be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17208fe59627SVladimir Kondratiev 1721e59d16c0SVladimir Kondratiev *_d = *d; 17225b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17235b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17245b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17252be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 17268fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 17272be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17282be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1729e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1730e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1731e3d2ed94SHamad Kadmany vring_index); 17322be7d22fSVladimir Kondratiev goto dma_error; 1733e3d2ed94SHamad Kadmany } 17342232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 173599b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1736c236658fSVladimir Kondratiev /* no need to check return code - 1737c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1738c236658fSVladimir Kondratiev * it will succeed here too 1739c236658fSVladimir Kondratiev */ 17403d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17412be7d22fSVladimir Kondratiev } 17422be7d22fSVladimir Kondratiev /* for the last seg only */ 17432be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1744668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17452be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 174668ada71eSVladimir Kondratiev *_d = *d; 17475b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17485b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17495b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17502be7d22fSVladimir Kondratiev 17516cdadd4dSVladimir Kondratiev /* hold reference to skb 17526cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17536cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17546cdadd4dSVladimir Kondratiev */ 17556cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17566cdadd4dSVladimir Kondratiev 17570436fd9aSVladimir Shulman /* performance monitoring */ 17580436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 17590436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 17600436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 17617c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17620436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17630436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 17640436fd9aSVladimir Shulman } 17657c0acf86SVladimir Kondratiev 1766eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1767eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1768eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1769eb26cff1SMaya Erez * skb before it was completed. 1770eb26cff1SMaya Erez */ 1771eb26cff1SMaya Erez wmb(); 1772eb26cff1SMaya Erez 17732be7d22fSVladimir Kondratiev /* advance swhead */ 17742be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 17755b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 17765b29c573SVladimir Kondratiev vring->swhead); 177798658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 17783d4bde15SVladimir Kondratiev 17793d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17803d4bde15SVladimir Kondratiev * committing them to HW 17813d4bde15SVladimir Kondratiev */ 17823d4bde15SVladimir Kondratiev wmb(); 17833d4bde15SVladimir Kondratiev 1784b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17852be7d22fSVladimir Kondratiev 17862be7d22fSVladimir Kondratiev return 0; 17872be7d22fSVladimir Kondratiev dma_error: 17882be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1789c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1790c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1791c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 17927e594444SVladimir Kondratiev 17932be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1794c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 17958fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 179668ada71eSVladimir Kondratiev *d = *_d; 179768ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 17982232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1799f88f113aSVladimir Kondratiev 1800f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18012be7d22fSVladimir Kondratiev } 18022be7d22fSVladimir Kondratiev 18032be7d22fSVladimir Kondratiev return -EINVAL; 18042be7d22fSVladimir Kondratiev } 18052be7d22fSVladimir Kondratiev 18065933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 18075933a06dSVladimir Kondratiev struct sk_buff *skb) 18085933a06dSVladimir Kondratiev { 18095933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 18105933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 18115933a06dSVladimir Kondratiev int rc; 18125933a06dSVladimir Kondratiev 18135933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18143d4bde15SVladimir Kondratiev 18153d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 18163d4bde15SVladimir Kondratiev (wil, vring, skb); 18173d4bde15SVladimir Kondratiev 18185933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 18193d4bde15SVladimir Kondratiev 18205933a06dSVladimir Kondratiev return rc; 18215933a06dSVladimir Kondratiev } 18225933a06dSVladimir Kondratiev 1823f9e3033fSDedy Lansky /** 1824f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 1825f9e3033fSDedy Lansky * 1826f9e3033fSDedy Lansky * This function does one of two checks: 1827f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1828f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1829f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1830f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1831f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1832f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1833f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1834f9e3033fSDedy Lansky * 1835f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1836f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1837f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1838f9e3033fSDedy Lansky */ 1839f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 1840f9e3033fSDedy Lansky struct vring *vring, 1841f9e3033fSDedy Lansky bool check_stop) 1842f9e3033fSDedy Lansky { 1843f9e3033fSDedy Lansky int i; 1844f9e3033fSDedy Lansky 1845f9e3033fSDedy Lansky if (vring) 1846f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d, check_stop=%d, stopped=%d", 1847f9e3033fSDedy Lansky (int)(vring - wil->vring_tx), check_stop, 1848f9e3033fSDedy Lansky wil->net_queue_stopped); 1849f9e3033fSDedy Lansky else 1850f9e3033fSDedy Lansky wil_dbg_txrx(wil, "check_stop=%d, stopped=%d", 1851f9e3033fSDedy Lansky check_stop, wil->net_queue_stopped); 1852f9e3033fSDedy Lansky 1853f9e3033fSDedy Lansky if (check_stop == wil->net_queue_stopped) 1854f9e3033fSDedy Lansky /* net queues already in desired state */ 1855f9e3033fSDedy Lansky return; 1856f9e3033fSDedy Lansky 1857f9e3033fSDedy Lansky if (check_stop) { 1858f9e3033fSDedy Lansky if (!vring || unlikely(wil_vring_avail_low(vring))) { 1859f9e3033fSDedy Lansky /* not enough room in the vring */ 1860f9e3033fSDedy Lansky netif_tx_stop_all_queues(wil_to_ndev(wil)); 1861f9e3033fSDedy Lansky wil->net_queue_stopped = true; 1862f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1863f9e3033fSDedy Lansky } 1864f9e3033fSDedy Lansky return; 1865f9e3033fSDedy Lansky } 1866f9e3033fSDedy Lansky 1867f9e3033fSDedy Lansky /* check wake */ 1868f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 1869f9e3033fSDedy Lansky struct vring *cur_vring = &wil->vring_tx[i]; 1870f9e3033fSDedy Lansky struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 1871f9e3033fSDedy Lansky 1872f9e3033fSDedy Lansky if (!cur_vring->va || !txdata->enabled || cur_vring == vring) 1873f9e3033fSDedy Lansky continue; 1874f9e3033fSDedy Lansky 1875f9e3033fSDedy Lansky if (wil_vring_avail_low(cur_vring)) { 1876f9e3033fSDedy Lansky wil_dbg_txrx(wil, "vring %d full, can't wake\n", 1877f9e3033fSDedy Lansky (int)(cur_vring - wil->vring_tx)); 1878f9e3033fSDedy Lansky return; 1879f9e3033fSDedy Lansky } 1880f9e3033fSDedy Lansky } 1881f9e3033fSDedy Lansky 1882f9e3033fSDedy Lansky if (!vring || wil_vring_avail_high(vring)) { 1883f9e3033fSDedy Lansky /* enough room in the vring */ 1884f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 1885f9e3033fSDedy Lansky netif_tx_wake_all_queues(wil_to_ndev(wil)); 1886f9e3033fSDedy Lansky wil->net_queue_stopped = false; 1887f9e3033fSDedy Lansky } 1888f9e3033fSDedy Lansky } 1889f9e3033fSDedy Lansky 1890f9e3033fSDedy Lansky void wil_update_net_queues(struct wil6210_priv *wil, struct vring *vring, 1891f9e3033fSDedy Lansky bool check_stop) 1892f9e3033fSDedy Lansky { 1893f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 1894f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1895f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1896f9e3033fSDedy Lansky } 1897f9e3033fSDedy Lansky 1898f9e3033fSDedy Lansky void wil_update_net_queues_bh(struct wil6210_priv *wil, struct vring *vring, 1899f9e3033fSDedy Lansky bool check_stop) 1900f9e3033fSDedy Lansky { 1901f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 1902f9e3033fSDedy Lansky __wil_update_net_queues(wil, vring, check_stop); 1903f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1904f9e3033fSDedy Lansky } 1905f9e3033fSDedy Lansky 19062be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19072be7d22fSVladimir Kondratiev { 19082be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 19093df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 191041d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 19112be7d22fSVladimir Kondratiev struct vring *vring; 1912aa27deaaSVladimir Kondratiev static bool pr_once_fw; 19132be7d22fSVladimir Kondratiev int rc; 19142be7d22fSVladimir Kondratiev 1915af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 191633c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1917aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 19182be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1919aa27deaaSVladimir Kondratiev pr_once_fw = true; 1920aa27deaaSVladimir Kondratiev } 19212be7d22fSVladimir Kondratiev goto drop; 19222be7d22fSVladimir Kondratiev } 192333c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1924d8ed043aSMaya Erez wil_dbg_ratelimited(wil, "FW not connected, packet dropped\n"); 19252be7d22fSVladimir Kondratiev goto drop; 19262be7d22fSVladimir Kondratiev } 192733c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 19282be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 19292be7d22fSVladimir Kondratiev goto drop; 19302be7d22fSVladimir Kondratiev } 1931aa27deaaSVladimir Kondratiev pr_once_fw = false; 1932d58db4e4SVladimir Kondratiev 19332be7d22fSVladimir Kondratiev /* find vring */ 1934a895cb8bSLior David if (wil->wdev->iftype == NL80211_IFTYPE_STATION && !wil->pbss) { 1935a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 193654ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 1937a895cb8bSLior David } else if (bcast) { 1938a895cb8bSLior David if (wil->pbss) 1939a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 1940a895cb8bSLior David * all stations VRINGs 1941a895cb8bSLior David */ 1942a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 1943a895cb8bSLior David else if (wil->wdev->iftype == NL80211_IFTYPE_AP) 1944a895cb8bSLior David /* AP has a dedicated bcast VRING */ 1945a895cb8bSLior David vring = wil_find_tx_bcast_1(wil, skb); 1946a895cb8bSLior David else 1947a895cb8bSLior David /* unexpected combination, fallback to duplicating 1948a895cb8bSLior David * the skb in all stations VRINGs 1949a895cb8bSLior David */ 1950a895cb8bSLior David vring = wil_find_tx_bcast_2(wil, skb); 1951a895cb8bSLior David } else { 1952a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 1953a895cb8bSLior David vring = wil_find_tx_ucast(wil, skb); 195454ed90a8SVladimir Kondratiev } 195533c477fdSVladimir Kondratiev if (unlikely(!vring)) { 19565aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 19572be7d22fSVladimir Kondratiev goto drop; 19582be7d22fSVladimir Kondratiev } 19592be7d22fSVladimir Kondratiev /* set up vring entry */ 19602be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1961d58db4e4SVladimir Kondratiev 19622be7d22fSVladimir Kondratiev switch (rc) { 19632be7d22fSVladimir Kondratiev case 0: 1964f9e3033fSDedy Lansky /* shall we stop net queues? */ 1965f9e3033fSDedy Lansky wil_update_net_queues_bh(wil, vring, true); 1966795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 19672be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 19682be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 19692be7d22fSVladimir Kondratiev case -ENOMEM: 19702be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 19712be7d22fSVladimir Kondratiev default: 1972afda8bb5SVladimir Kondratiev break; /* goto drop; */ 19732be7d22fSVladimir Kondratiev } 19742be7d22fSVladimir Kondratiev drop: 19752be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 19762be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 19772be7d22fSVladimir Kondratiev 19782be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 19792be7d22fSVladimir Kondratiev } 19802be7d22fSVladimir Kondratiev 1981713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1982713c8a29SVladimir Kondratiev { 1983713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1984713c8a29SVladimir Kondratiev 1985713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1986713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1987713c8a29SVladimir Kondratiev } 1988713c8a29SVladimir Kondratiev 1989713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1990713c8a29SVladimir Kondratiev { 1991713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1992713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1993713c8a29SVladimir Kondratiev else 1994713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1995713c8a29SVladimir Kondratiev } 1996713c8a29SVladimir Kondratiev 19972be7d22fSVladimir Kondratiev /** 19982be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 19992be7d22fSVladimir Kondratiev * 2000e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2001e0287c4aSVladimir Kondratiev * 20022be7d22fSVladimir Kondratiev * Safe to call from IRQ 20032be7d22fSVladimir Kondratiev */ 2004e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 20052be7d22fSVladimir Kondratiev { 2006795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 20072be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 20082be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 2009097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 2010e0287c4aSVladimir Kondratiev int done = 0; 2011c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 201241d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2013c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20140436fd9aSVladimir Shulman int used_before_complete; 20150436fd9aSVladimir Shulman int used_new; 20162be7d22fSVladimir Kondratiev 201733c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 20182be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2019e0287c4aSVladimir Kondratiev return 0; 20202be7d22fSVladimir Kondratiev } 20212be7d22fSVladimir Kondratiev 202233c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2023097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2024097638a0SVladimir Kondratiev return 0; 2025097638a0SVladimir Kondratiev } 2026097638a0SVladimir Kondratiev 2027af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 20282be7d22fSVladimir Kondratiev 20290436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 20300436fd9aSVladimir Shulman 203141d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 203241d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 203341d6b093SVladimir Kondratiev 20342be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 2035c236658fSVladimir Kondratiev int new_swtail; 2036c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2037c236658fSVladimir Kondratiev /** 2038c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 20393d4bde15SVladimir Kondratiev * last fragment. look for it. 20403d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2041c236658fSVladimir Kondratiev */ 2042c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2043c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2044c236658fSVladimir Kondratiev 2045c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 204633c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2047c236658fSVladimir Kondratiev break; 2048c236658fSVladimir Kondratiev 2049c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2050c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 20514de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 20527e594444SVladimir Kondratiev u16 dmalen; 205376dfa4b7SVladimir Kondratiev struct sk_buff *skb; 205476dfa4b7SVladimir Kondratiev 205576dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 205676dfa4b7SVladimir Kondratiev skb = ctx->skb; 2057c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 20584de41befSVladimir Kondratiev 205968ada71eSVladimir Kondratiev *d = *_d; 20604de41befSVladimir Kondratiev 20617e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 206298658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 206398658095SVladimir Kondratiev d->dma.error); 20647743882dSVladimir Kondratiev wil_dbg_txrx(wil, 20655b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 20665b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 20675b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 20685b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 20692be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 20702be7d22fSVladimir Kondratiev 20712232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2072f88f113aSVladimir Kondratiev 20732be7d22fSVladimir Kondratiev if (skb) { 207433c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2075795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2076795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 207741d6b093SVladimir Kondratiev if (stats) { 207841d6b093SVladimir Kondratiev stats->tx_packets++; 2079c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 208041d6b093SVladimir Kondratiev } 2081795ce734SVladimir Kondratiev } else { 2082795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 208341d6b093SVladimir Kondratiev if (stats) 2084c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2085795ce734SVladimir Kondratiev } 2086713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 20872be7d22fSVladimir Kondratiev } 2088f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2089eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 2090eb26cff1SMaya Erez * to prevent a case where wil_tx_vring will see 2091eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2092eb26cff1SMaya Erez * is completed. 2093eb26cff1SMaya Erez */ 2094eb26cff1SMaya Erez wmb(); 2095c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 209603269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 209703269c65SVladimir Kondratiev * so hardware will not try to process this desc., 209803269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 209903269c65SVladimir Kondratiev */ 21002be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 2101e0287c4aSVladimir Kondratiev done++; 21022be7d22fSVladimir Kondratiev } 2103c236658fSVladimir Kondratiev } 210467c3e1b4SVladimir Kondratiev 21050436fd9aSVladimir Shulman /* performance monitoring */ 21060436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 21070436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 21080436fd9aSVladimir Shulman used_new, used_before_complete)) { 21090436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21100436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 21117c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 21127c0acf86SVladimir Kondratiev } 211367c3e1b4SVladimir Kondratiev 2114f9e3033fSDedy Lansky /* shall we wake net queues? */ 2115f9e3033fSDedy Lansky if (done) 2116f9e3033fSDedy Lansky wil_update_net_queues(wil, vring, false); 2117e0287c4aSVladimir Kondratiev 2118e0287c4aSVladimir Kondratiev return done; 21192be7d22fSVladimir Kondratiev } 2120