12be7d22fSVladimir Kondratiev /* 2230d8442SVladimir Kondratiev * Copyright (c) 2012-2015 Qualcomm Atheros, Inc. 32be7d22fSVladimir Kondratiev * 42be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 52be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 62be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 72be7d22fSVladimir Kondratiev * 82be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 92be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 102be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 112be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 122be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 132be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 142be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 152be7d22fSVladimir Kondratiev */ 162be7d22fSVladimir Kondratiev 172be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 182be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 192be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 202be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 21504937d4SKirshenbaum Erez #include <linux/ip.h> 22504937d4SKirshenbaum Erez #include <linux/ipv6.h> 23504937d4SKirshenbaum Erez #include <net/ipv6.h> 240786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 252be7d22fSVladimir Kondratiev 262be7d22fSVladimir Kondratiev #include "wil6210.h" 272be7d22fSVladimir Kondratiev #include "wmi.h" 282be7d22fSVladimir Kondratiev #include "txrx.h" 2998658095SVladimir Kondratiev #include "trace.h" 302be7d22fSVladimir Kondratiev 312be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 322be7d22fSVladimir Kondratiev module_param(rtap_include_phy_info, bool, S_IRUGO); 332be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 342be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 352be7d22fSVladimir Kondratiev 36c406ea7cSVladimir Kondratiev bool rx_align_2; 37c406ea7cSVladimir Kondratiev module_param(rx_align_2, bool, S_IRUGO); 38c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 39c406ea7cSVladimir Kondratiev 40c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 41c406ea7cSVladimir Kondratiev { 42c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 43c406ea7cSVladimir Kondratiev } 44c406ea7cSVladimir Kondratiev 452be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 462be7d22fSVladimir Kondratiev { 472be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 482be7d22fSVladimir Kondratiev } 492be7d22fSVladimir Kondratiev 502be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 512be7d22fSVladimir Kondratiev { 522be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 532be7d22fSVladimir Kondratiev } 542be7d22fSVladimir Kondratiev 552be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 562be7d22fSVladimir Kondratiev { 572be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 582be7d22fSVladimir Kondratiev } 592be7d22fSVladimir Kondratiev 602be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 612be7d22fSVladimir Kondratiev { 622be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 632be7d22fSVladimir Kondratiev } 648fe59627SVladimir Kondratiev 650436fd9aSVladimir Shulman /* Used space in Tx Vring */ 660436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 672be7d22fSVladimir Kondratiev { 682be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 692be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 700436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 712be7d22fSVladimir Kondratiev } 722be7d22fSVladimir Kondratiev 730436fd9aSVladimir Shulman /* Available space in Tx Vring */ 740436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 750436fd9aSVladimir Shulman { 760436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 770436fd9aSVladimir Shulman } 780436fd9aSVladimir Shulman 790436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 805bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 815bb6423eSVladimir Kondratiev { 825bb6423eSVladimir Kondratiev return vring->size/8; 835bb6423eSVladimir Kondratiev } 845bb6423eSVladimir Kondratiev 850436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 865bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 875bb6423eSVladimir Kondratiev { 885bb6423eSVladimir Kondratiev return vring->size/4; 895bb6423eSVladimir Kondratiev } 905bb6423eSVladimir Kondratiev 910436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 920436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 930436fd9aSVladimir Shulman { 940436fd9aSVladimir Shulman return val >= min && val < max; 950436fd9aSVladimir Shulman } 960436fd9aSVladimir Shulman 972be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 982be7d22fSVladimir Kondratiev { 992be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1002be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1012be7d22fSVladimir Kondratiev uint i; 1022be7d22fSVladimir Kondratiev 1039cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 1049cf10d62SVladimir Kondratiev 1052be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1062be7d22fSVladimir Kondratiev 1072be7d22fSVladimir Kondratiev vring->swhead = 0; 1082be7d22fSVladimir Kondratiev vring->swtail = 0; 109f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1102be7d22fSVladimir Kondratiev if (!vring->ctx) { 1112be7d22fSVladimir Kondratiev vring->va = NULL; 1122be7d22fSVladimir Kondratiev return -ENOMEM; 1132be7d22fSVladimir Kondratiev } 1140436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 1152be7d22fSVladimir Kondratiev * This is granted by the dma_alloc_coherent 1162be7d22fSVladimir Kondratiev */ 1172be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1182be7d22fSVladimir Kondratiev if (!vring->va) { 1192be7d22fSVladimir Kondratiev kfree(vring->ctx); 1202be7d22fSVladimir Kondratiev vring->ctx = NULL; 1212be7d22fSVladimir Kondratiev return -ENOMEM; 1222be7d22fSVladimir Kondratiev } 1232be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1242be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1252be7d22fSVladimir Kondratiev * we can use any 1262be7d22fSVladimir Kondratiev */ 1272be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 1288fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 1298fe59627SVladimir Kondratiev 13068ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1312be7d22fSVladimir Kondratiev } 1322be7d22fSVladimir Kondratiev 13339c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 13439c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1352be7d22fSVladimir Kondratiev 1362be7d22fSVladimir Kondratiev return 0; 1372be7d22fSVladimir Kondratiev } 1382be7d22fSVladimir Kondratiev 1392232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1402232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1412232abd5SVladimir Kondratiev { 1422232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1432232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1448fe59627SVladimir Kondratiev 1452232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1462232abd5SVladimir Kondratiev case wil_mapped_as_single: 1472232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1482232abd5SVladimir Kondratiev break; 1492232abd5SVladimir Kondratiev case wil_mapped_as_page: 1502232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1512232abd5SVladimir Kondratiev break; 1522232abd5SVladimir Kondratiev default: 1532232abd5SVladimir Kondratiev break; 1542232abd5SVladimir Kondratiev } 1552232abd5SVladimir Kondratiev } 1562232abd5SVladimir Kondratiev 1572be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 1582be7d22fSVladimir Kondratiev int tx) 1592be7d22fSVladimir Kondratiev { 1602be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1612be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1622be7d22fSVladimir Kondratiev 163ef77285fSVladimir Kondratiev if (tx) { 164ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 165ef77285fSVladimir Kondratiev 166ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 167ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 168ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 169ef77285fSVladimir Kondratiev } else { 170ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 171ef77285fSVladimir Kondratiev vring->size, vring->va, 172ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 173ef77285fSVladimir Kondratiev } 174ef77285fSVladimir Kondratiev 1752be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 17668ada71eSVladimir Kondratiev dma_addr_t pa; 1777e594444SVladimir Kondratiev u16 dmalen; 178f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 17968ada71eSVladimir Kondratiev 1802be7d22fSVladimir Kondratiev if (tx) { 18168ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 18268ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 1832be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 18468ada71eSVladimir Kondratiev 185f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 18668ada71eSVladimir Kondratiev *d = *_d; 1872232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 188f88f113aSVladimir Kondratiev if (ctx->skb) 189f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 1902be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1912be7d22fSVladimir Kondratiev } else { /* rx */ 19268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 19368ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 1944d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 19568ada71eSVladimir Kondratiev 196f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 19768ada71eSVladimir Kondratiev *d = *_d; 19868ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 1997e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2007e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 201f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2022be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2032be7d22fSVladimir Kondratiev } 2042be7d22fSVladimir Kondratiev } 2052be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2062be7d22fSVladimir Kondratiev kfree(vring->ctx); 2072be7d22fSVladimir Kondratiev vring->pa = 0; 2082be7d22fSVladimir Kondratiev vring->va = NULL; 2092be7d22fSVladimir Kondratiev vring->ctx = NULL; 2102be7d22fSVladimir Kondratiev } 2112be7d22fSVladimir Kondratiev 2122be7d22fSVladimir Kondratiev /** 2132be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2142be7d22fSVladimir Kondratiev * 2152be7d22fSVladimir Kondratiev * Safe to call from IRQ 2162be7d22fSVladimir Kondratiev */ 2172be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 2182be7d22fSVladimir Kondratiev u32 i, int headroom) 2192be7d22fSVladimir Kondratiev { 2202be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 221c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen(); 22268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 2238fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 2242be7d22fSVladimir Kondratiev dma_addr_t pa; 2252be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2268fe59627SVladimir Kondratiev 2272be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2282be7d22fSVladimir Kondratiev return -ENOMEM; 2292be7d22fSVladimir Kondratiev 2302be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2312be7d22fSVladimir Kondratiev skb_put(skb, sz); 2322be7d22fSVladimir Kondratiev 2332be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2342be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2352be7d22fSVladimir Kondratiev kfree_skb(skb); 2362be7d22fSVladimir Kondratiev return -ENOMEM; 2372be7d22fSVladimir Kondratiev } 2382be7d22fSVladimir Kondratiev 23948c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 24068ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2412be7d22fSVladimir Kondratiev /* ip_length don't care */ 2422be7d22fSVladimir Kondratiev /* b11 don't care */ 2432be7d22fSVladimir Kondratiev /* error don't care */ 2442be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2457e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 24668ada71eSVladimir Kondratiev *_d = *d; 247f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2482be7d22fSVladimir Kondratiev 2492be7d22fSVladimir Kondratiev return 0; 2502be7d22fSVladimir Kondratiev } 2512be7d22fSVladimir Kondratiev 2522be7d22fSVladimir Kondratiev /** 2532be7d22fSVladimir Kondratiev * Adds radiotap header 2542be7d22fSVladimir Kondratiev * 2552be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 2562be7d22fSVladimir Kondratiev * 2572be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 2582be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 2592be7d22fSVladimir Kondratiev * - Phy info 2602be7d22fSVladimir Kondratiev */ 2612be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 26233e61169SVladimir Kondratiev struct sk_buff *skb) 2632be7d22fSVladimir Kondratiev { 2642be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 2652be7d22fSVladimir Kondratiev struct wil6210_rtap { 2662be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 2672be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 2682be7d22fSVladimir Kondratiev /* flags */ 2692be7d22fSVladimir Kondratiev u8 flags; 2702be7d22fSVladimir Kondratiev /* channel */ 2712be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 2722be7d22fSVladimir Kondratiev __le16 chnl_flags; 2732be7d22fSVladimir Kondratiev /* MCS */ 2742be7d22fSVladimir Kondratiev u8 mcs_present; 2752be7d22fSVladimir Kondratiev u8 mcs_flags; 2762be7d22fSVladimir Kondratiev u8 mcs_index; 2772be7d22fSVladimir Kondratiev } __packed; 2782be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 2792be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 2802be7d22fSVladimir Kondratiev /* vendor */ 2812be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 2822be7d22fSVladimir Kondratiev u8 vendor_ns; 2832be7d22fSVladimir Kondratiev __le16 vendor_skip; 2842be7d22fSVladimir Kondratiev u8 vendor_data[0]; 2852be7d22fSVladimir Kondratiev } __packed; 28633e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 2872be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 2882be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 2892be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 2902be7d22fSVladimir Kondratiev static char phy_data[128]; 2912be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 2922be7d22fSVladimir Kondratiev 2932be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 2942be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 2952be7d22fSVladimir Kondratiev /* calculate additional length */ 2962be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 2972be7d22fSVladimir Kondratiev /** 2982be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 2992be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3002be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3012be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3022be7d22fSVladimir Kondratiev */ 3032be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3042be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3058fe59627SVladimir Kondratiev 3062be7d22fSVladimir Kondratiev if (len > 8) { 3072be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3082be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3098fe59627SVladimir Kondratiev 3102be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3112be7d22fSVladimir Kondratiev phy_length = len - 8; 3122be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3132be7d22fSVladimir Kondratiev } 3142be7d22fSVladimir Kondratiev } 3152be7d22fSVladimir Kondratiev } 3162be7d22fSVladimir Kondratiev rtap_len += phy_length; 3172be7d22fSVladimir Kondratiev } 3182be7d22fSVladimir Kondratiev 3192be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3202be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3212be7d22fSVladimir Kondratiev wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); 3222be7d22fSVladimir Kondratiev return; 3232be7d22fSVladimir Kondratiev } 3242be7d22fSVladimir Kondratiev 3252be7d22fSVladimir Kondratiev rtap_vendor = (void *)skb_push(skb, rtap_len); 3262be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3272be7d22fSVladimir Kondratiev 3282be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3292be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3302be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3312be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3322be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3332be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3342be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3352be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3362be7d22fSVladimir Kondratiev 3372be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3382be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3392be7d22fSVladimir Kondratiev 3402be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3412be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3422be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3432be7d22fSVladimir Kondratiev 3442be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3452be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3462be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3472be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3482be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3492be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3502be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 3512be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 3522be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 3532be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 3542be7d22fSVladimir Kondratiev phy_length); 3552be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 3562be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 3572be7d22fSVladimir Kondratiev phy_length); 3582be7d22fSVladimir Kondratiev } 3592be7d22fSVladimir Kondratiev } 3602be7d22fSVladimir Kondratiev 3612be7d22fSVladimir Kondratiev /** 3622be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 3632be7d22fSVladimir Kondratiev * 36433e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 36533e61169SVladimir Kondratiev * 3662be7d22fSVladimir Kondratiev * Safe to call from IRQ 3672be7d22fSVladimir Kondratiev */ 3682be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 3692be7d22fSVladimir Kondratiev struct vring *vring) 3702be7d22fSVladimir Kondratiev { 3712be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 3722be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 37368ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 37468ada71eSVladimir Kondratiev struct vring_rx_desc *d; 3752be7d22fSVladimir Kondratiev struct sk_buff *skb; 3762be7d22fSVladimir Kondratiev dma_addr_t pa; 377c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 378c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + snaplen; 3797e594444SVladimir Kondratiev u16 dmalen; 3802be7d22fSVladimir Kondratiev u8 ftype; 381c8b78b5fSVladimir Kondratiev int cid; 3823b282bc6SVladimir Kondratiev int i; 383c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 384c8b78b5fSVladimir Kondratiev 38533e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 38633e61169SVladimir Kondratiev 3873b282bc6SVladimir Kondratiev again: 38833c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 3892be7d22fSVladimir Kondratiev return NULL; 3902be7d22fSVladimir Kondratiev 3913b282bc6SVladimir Kondratiev i = (int)vring->swhead; 392148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 39333c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 3942be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 3952be7d22fSVladimir Kondratiev return NULL; 3962be7d22fSVladimir Kondratiev } 3972be7d22fSVladimir Kondratiev 398148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 399148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 400148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 401148416a9SVladimir Kondratiev if (!skb) { 402148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4033b282bc6SVladimir Kondratiev goto again; 404148416a9SVladimir Kondratiev } 40568ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 40668ada71eSVladimir Kondratiev *d = *_d; 40768ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 40868ada71eSVladimir Kondratiev 40968ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 41068ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 41168ada71eSVladimir Kondratiev 412148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 413148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 41468ada71eSVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4, 41568ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 41668ada71eSVladimir Kondratiev 4173b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4183b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4193b282bc6SVladimir Kondratiev 42033c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 421e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4223b282bc6SVladimir Kondratiev stats->rx_large_frame++; 423110dea00SWei Yongjun kfree_skb(skb); 4243b282bc6SVladimir Kondratiev goto again; 425e270045bSVladimir Kondratiev } 4267e594444SVladimir Kondratiev skb_trim(skb, dmalen); 42733e61169SVladimir Kondratiev 4281cbbcb08SVladimir Kondratiev prefetch(skb->data); 4291cbbcb08SVladimir Kondratiev 430c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 431c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 432c0d37713SVladimir Kondratiev 433c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 434c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 435c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4362be7d22fSVladimir Kondratiev 4372be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4382be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 43933e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4402be7d22fSVladimir Kondratiev 4412be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4422be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4432be7d22fSVladimir Kondratiev return skb; 4442be7d22fSVladimir Kondratiev /* 4452be7d22fSVladimir Kondratiev * Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4462be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4472be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4482be7d22fSVladimir Kondratiev */ 44968ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 45033c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 4517743882dSVladimir Kondratiev wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype); 4522be7d22fSVladimir Kondratiev /* TODO: process it */ 4533b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 4542be7d22fSVladimir Kondratiev kfree_skb(skb); 4553b282bc6SVladimir Kondratiev goto again; 4562be7d22fSVladimir Kondratiev } 4572be7d22fSVladimir Kondratiev 458c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 4592be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 4602be7d22fSVladimir Kondratiev /* TODO: process it (i.e. BAR) */ 4613b282bc6SVladimir Kondratiev stats->rx_short_frame++; 4622be7d22fSVladimir Kondratiev kfree_skb(skb); 4633b282bc6SVladimir Kondratiev goto again; 4642be7d22fSVladimir Kondratiev } 4652be7d22fSVladimir Kondratiev 466504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 467504937d4SKirshenbaum Erez * and in case of error drop the packet 468504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 469504937d4SKirshenbaum Erez */ 47033c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 471504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 47233c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 473504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 4744a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 4754a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 4764a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 4774a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 4784a68ab10SVladimir Kondratiev */ 479504937d4SKirshenbaum Erez } 480504937d4SKirshenbaum Erez 481c406ea7cSVladimir Kondratiev if (snaplen) { 482c406ea7cSVladimir Kondratiev /* Packet layout 483c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 484c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 485c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 486c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 487c406ea7cSVladimir Kondratiev */ 488c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 489c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 490c406ea7cSVladimir Kondratiev } 491c406ea7cSVladimir Kondratiev 4922be7d22fSVladimir Kondratiev return skb; 4932be7d22fSVladimir Kondratiev } 4942be7d22fSVladimir Kondratiev 4952be7d22fSVladimir Kondratiev /** 4962be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 4972be7d22fSVladimir Kondratiev * buffers posted at @swtail 4982be7d22fSVladimir Kondratiev */ 4992be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5002be7d22fSVladimir Kondratiev { 5012be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 5022be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 5032be7d22fSVladimir Kondratiev u32 next_tail; 5042be7d22fSVladimir Kondratiev int rc = 0; 5052be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5062be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5072be7d22fSVladimir Kondratiev 5082be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5092be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5102be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5112be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 51233c477fdSVladimir Kondratiev if (unlikely(rc)) { 5132be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5142be7d22fSVladimir Kondratiev rc, v->swtail); 5152be7d22fSVladimir Kondratiev break; 5162be7d22fSVladimir Kondratiev } 5172be7d22fSVladimir Kondratiev } 518b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5192be7d22fSVladimir Kondratiev 5202be7d22fSVladimir Kondratiev return rc; 5212be7d22fSVladimir Kondratiev } 5222be7d22fSVladimir Kondratiev 5232be7d22fSVladimir Kondratiev /* 5242be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 525e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 5262be7d22fSVladimir Kondratiev */ 527b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 5282be7d22fSVladimir Kondratiev { 529c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 530c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 531c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 5322be7d22fSVladimir Kondratiev unsigned int len = skb->len; 533c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 53441d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 535c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 536c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 537c42da999SVladimir Kondratiev * is not suitable, need to look at data 538c42da999SVladimir Kondratiev */ 539c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 540c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 541c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 542c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 543c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 544c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 545c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 546c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 547c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 548c42da999SVladimir Kondratiev }; 5492be7d22fSVladimir Kondratiev 5500553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 5510553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 5520553640dSVladimir Shulman * set hash to any non-zero value to activate rps 5530553640dSVladimir Shulman * mechanism, core will be chosen according 5540553640dSVladimir Shulman * to user-level rps configuration. 5550553640dSVladimir Shulman */ 5560553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 5570553640dSVladimir Shulman 558241804cbSVladimir Kondratiev skb_orphan(skb); 559241804cbSVladimir Kondratiev 56002beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 561c42da999SVladimir Kondratiev if (mcast) { 562c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 563c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 564c42da999SVladimir Kondratiev */ 565c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 566c42da999SVladimir Kondratiev } else { 567c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 5682be7d22fSVladimir Kondratiev 569c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 570c42da999SVladimir Kondratiev /* The destination station is associated to 571c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 572c42da999SVladimir Kondratiev * directly to it and do not pass it to local 573c42da999SVladimir Kondratiev * net stack. 574c42da999SVladimir Kondratiev */ 575c42da999SVladimir Kondratiev xmit_skb = skb; 576c42da999SVladimir Kondratiev skb = NULL; 577c42da999SVladimir Kondratiev } 578c42da999SVladimir Kondratiev } 579c42da999SVladimir Kondratiev } 580c42da999SVladimir Kondratiev if (xmit_skb) { 581c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 582c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 583c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 584c42da999SVladimir Kondratiev */ 585c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 586c42da999SVladimir Kondratiev xmit_skb->priority += 256; 587c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 588c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 589c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 590c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 591c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 592c42da999SVladimir Kondratiev } 593c42da999SVladimir Kondratiev 594c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 595c42da999SVladimir Kondratiev 596c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 597c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 598c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 599c42da999SVladimir Kondratiev len, gro_res_str[rc]); 600c42da999SVladimir Kondratiev } 601c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 602b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 603b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 604b5998e6aSVladimir Kondratiev stats->rx_dropped++; 605b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 606b5998e6aSVladimir Kondratiev } else { 6072be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 608c8b78b5fSVladimir Kondratiev stats->rx_packets++; 6092be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 610c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 611c42da999SVladimir Kondratiev if (mcast) 612c42da999SVladimir Kondratiev ndev->stats.multicast++; 613194b482bSVladimir Kondratiev } 6142be7d22fSVladimir Kondratiev } 6152be7d22fSVladimir Kondratiev 6162be7d22fSVladimir Kondratiev /** 6172be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 6182be7d22fSVladimir Kondratiev * 619e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 6202be7d22fSVladimir Kondratiev */ 621e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 6222be7d22fSVladimir Kondratiev { 6232be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 6242be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 6252be7d22fSVladimir Kondratiev struct sk_buff *skb; 6262be7d22fSVladimir Kondratiev 62733c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 6282be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 6292be7d22fSVladimir Kondratiev return; 6302be7d22fSVladimir Kondratiev } 6317743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 632e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 633e0287c4aSVladimir Kondratiev (*quota)--; 6342be7d22fSVladimir Kondratiev 6352be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 6362be7d22fSVladimir Kondratiev skb->dev = ndev; 6372be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 6382be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 6392be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 6402be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 641b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 6422be7d22fSVladimir Kondratiev } else { 643b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 6442be7d22fSVladimir Kondratiev } 6452be7d22fSVladimir Kondratiev } 6462be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 6472be7d22fSVladimir Kondratiev } 6482be7d22fSVladimir Kondratiev 649d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 6502be7d22fSVladimir Kondratiev { 6512be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 6522be7d22fSVladimir Kondratiev int rc; 6532be7d22fSVladimir Kondratiev 6549cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 6559cf10d62SVladimir Kondratiev 6568bf6adb9SVladimir Kondratiev if (vring->va) { 6578bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 6588bf6adb9SVladimir Kondratiev return -EINVAL; 6598bf6adb9SVladimir Kondratiev } 6608bf6adb9SVladimir Kondratiev 661d3762b40SVladimir Kondratiev vring->size = size; 6622be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 6632be7d22fSVladimir Kondratiev if (rc) 6642be7d22fSVladimir Kondratiev return rc; 6652be7d22fSVladimir Kondratiev 66647e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 6672be7d22fSVladimir Kondratiev if (rc) 6682be7d22fSVladimir Kondratiev goto err_free; 6692be7d22fSVladimir Kondratiev 6702be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 6712be7d22fSVladimir Kondratiev if (rc) 6722be7d22fSVladimir Kondratiev goto err_free; 6732be7d22fSVladimir Kondratiev 6742be7d22fSVladimir Kondratiev return 0; 6752be7d22fSVladimir Kondratiev err_free: 6762be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 6772be7d22fSVladimir Kondratiev 6782be7d22fSVladimir Kondratiev return rc; 6792be7d22fSVladimir Kondratiev } 6802be7d22fSVladimir Kondratiev 6812be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 6822be7d22fSVladimir Kondratiev { 6832be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 6842be7d22fSVladimir Kondratiev 6859cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 6869cf10d62SVladimir Kondratiev 6872acb4220SVladimir Kondratiev if (vring->va) 6882be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 6892be7d22fSVladimir Kondratiev } 6902be7d22fSVladimir Kondratiev 6912be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 6922be7d22fSVladimir Kondratiev int cid, int tid) 6932be7d22fSVladimir Kondratiev { 6942be7d22fSVladimir Kondratiev int rc; 6952be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 6962be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 6972be7d22fSVladimir Kondratiev .vring_cfg = { 6982be7d22fSVladimir Kondratiev .tx_sw_ring = { 6999a06bec9SVladimir Kondratiev .max_mpdu_size = 700c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 701b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 7022be7d22fSVladimir Kondratiev }, 7032be7d22fSVladimir Kondratiev .ringid = id, 704a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 7052be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 7062be7d22fSVladimir Kondratiev .mac_ctrl = 0, 7072be7d22fSVladimir Kondratiev .to_resolution = 0, 7083277213fSVladimir Kondratiev .agg_max_wsize = 0, 7092be7d22fSVladimir Kondratiev .schd_params = { 7102be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 7112be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 7122be7d22fSVladimir Kondratiev }, 7132be7d22fSVladimir Kondratiev }, 7142be7d22fSVladimir Kondratiev }; 7152be7d22fSVladimir Kondratiev struct { 7162be7d22fSVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 7172be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 7182be7d22fSVladimir Kondratiev } __packed reply; 7192be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 720097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 7212be7d22fSVladimir Kondratiev 722e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 723e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 7249cf10d62SVladimir Kondratiev 7252be7d22fSVladimir Kondratiev if (vring->va) { 7262be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 7272be7d22fSVladimir Kondratiev rc = -EINVAL; 7282be7d22fSVladimir Kondratiev goto out; 7292be7d22fSVladimir Kondratiev } 7302be7d22fSVladimir Kondratiev 731097638a0SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 7325933a06dSVladimir Kondratiev spin_lock_init(&txdata->lock); 7332be7d22fSVladimir Kondratiev vring->size = size; 7342be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7352be7d22fSVladimir Kondratiev if (rc) 7362be7d22fSVladimir Kondratiev goto out; 7372be7d22fSVladimir Kondratiev 73893ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 73993ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 74093ae6d49SVladimir Kondratiev 7412be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 7422be7d22fSVladimir Kondratiev 743230d8442SVladimir Kondratiev if (!wil->privacy) 744230d8442SVladimir Kondratiev txdata->dot1x_open = true; 7452be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 7462be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 7472be7d22fSVladimir Kondratiev if (rc) 7482be7d22fSVladimir Kondratiev goto out_free; 7492be7d22fSVladimir Kondratiev 750b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 7512be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 7522be7d22fSVladimir Kondratiev reply.cmd.status); 753c331997bSVladimir Kondratiev rc = -EINVAL; 7542be7d22fSVladimir Kondratiev goto out_free; 7552be7d22fSVladimir Kondratiev } 7562be7d22fSVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 7572be7d22fSVladimir Kondratiev 758097638a0SVladimir Kondratiev txdata->enabled = 1; 759230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 7603a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 761097638a0SVladimir Kondratiev 7622be7d22fSVladimir Kondratiev return 0; 7632be7d22fSVladimir Kondratiev out_free: 764230d8442SVladimir Kondratiev txdata->dot1x_open = false; 765230d8442SVladimir Kondratiev txdata->enabled = 0; 7662be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 7672be7d22fSVladimir Kondratiev out: 7682be7d22fSVladimir Kondratiev 7692be7d22fSVladimir Kondratiev return rc; 7702be7d22fSVladimir Kondratiev } 7712be7d22fSVladimir Kondratiev 77241d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 77341d6b093SVladimir Kondratiev { 77441d6b093SVladimir Kondratiev int rc; 77541d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 77641d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 77741d6b093SVladimir Kondratiev .vring_cfg = { 77841d6b093SVladimir Kondratiev .tx_sw_ring = { 77941d6b093SVladimir Kondratiev .max_mpdu_size = 78041d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 78141d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 78241d6b093SVladimir Kondratiev }, 78341d6b093SVladimir Kondratiev .ringid = id, 78441d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 78541d6b093SVladimir Kondratiev }, 78641d6b093SVladimir Kondratiev }; 78741d6b093SVladimir Kondratiev struct { 78841d6b093SVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 78941d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 79041d6b093SVladimir Kondratiev } __packed reply; 79141d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 79241d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 79341d6b093SVladimir Kondratiev 79441d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 79541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 79641d6b093SVladimir Kondratiev 79741d6b093SVladimir Kondratiev if (vring->va) { 79841d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 79941d6b093SVladimir Kondratiev rc = -EINVAL; 80041d6b093SVladimir Kondratiev goto out; 80141d6b093SVladimir Kondratiev } 80241d6b093SVladimir Kondratiev 80341d6b093SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 80441d6b093SVladimir Kondratiev spin_lock_init(&txdata->lock); 80541d6b093SVladimir Kondratiev vring->size = size; 80641d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 80741d6b093SVladimir Kondratiev if (rc) 80841d6b093SVladimir Kondratiev goto out; 80941d6b093SVladimir Kondratiev 81041d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 81141d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 81241d6b093SVladimir Kondratiev 81341d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 81441d6b093SVladimir Kondratiev 815230d8442SVladimir Kondratiev if (!wil->privacy) 816230d8442SVladimir Kondratiev txdata->dot1x_open = true; 81741d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 81841d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 81941d6b093SVladimir Kondratiev if (rc) 82041d6b093SVladimir Kondratiev goto out_free; 82141d6b093SVladimir Kondratiev 82241d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 82341d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 82441d6b093SVladimir Kondratiev reply.cmd.status); 82541d6b093SVladimir Kondratiev rc = -EINVAL; 82641d6b093SVladimir Kondratiev goto out_free; 82741d6b093SVladimir Kondratiev } 82841d6b093SVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 82941d6b093SVladimir Kondratiev 83041d6b093SVladimir Kondratiev txdata->enabled = 1; 83141d6b093SVladimir Kondratiev 83241d6b093SVladimir Kondratiev return 0; 83341d6b093SVladimir Kondratiev out_free: 834230d8442SVladimir Kondratiev txdata->enabled = 0; 835230d8442SVladimir Kondratiev txdata->dot1x_open = false; 83641d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 83741d6b093SVladimir Kondratiev out: 83841d6b093SVladimir Kondratiev 83941d6b093SVladimir Kondratiev return rc; 84041d6b093SVladimir Kondratiev } 84141d6b093SVladimir Kondratiev 8422be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 8432be7d22fSVladimir Kondratiev { 8442be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 8453a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8462be7d22fSVladimir Kondratiev 847097638a0SVladimir Kondratiev WARN_ON(!mutex_is_locked(&wil->mutex)); 848097638a0SVladimir Kondratiev 8492be7d22fSVladimir Kondratiev if (!vring->va) 8502be7d22fSVladimir Kondratiev return; 8512be7d22fSVladimir Kondratiev 8529cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 8539cf10d62SVladimir Kondratiev 8545933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 855230d8442SVladimir Kondratiev txdata->dot1x_open = false; 8565933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 8575933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 858097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 8599419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 860097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 861097638a0SVladimir Kondratiev 8622be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8633a124ed6SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 8642be7d22fSVladimir Kondratiev } 8652be7d22fSVladimir Kondratiev 86641d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 8672be7d22fSVladimir Kondratiev struct sk_buff *skb) 8682be7d22fSVladimir Kondratiev { 8693df2cd36SVladimir Kondratiev int i; 8703df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 8713df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 8722be7d22fSVladimir Kondratiev 8733df2cd36SVladimir Kondratiev if (cid < 0) 8743df2cd36SVladimir Kondratiev return NULL; 8753df2cd36SVladimir Kondratiev 8763df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 8773df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 878230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 879230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 880230d8442SVladimir Kondratiev continue; 8813df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 8823df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 8838fe59627SVladimir Kondratiev 8843df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 8853df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 8863df2cd36SVladimir Kondratiev if (v->va) { 8872be7d22fSVladimir Kondratiev return v; 8883df2cd36SVladimir Kondratiev } else { 8893df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 8903df2cd36SVladimir Kondratiev return NULL; 8913df2cd36SVladimir Kondratiev } 8923df2cd36SVladimir Kondratiev } 8933df2cd36SVladimir Kondratiev } 8942be7d22fSVladimir Kondratiev 8952be7d22fSVladimir Kondratiev return NULL; 8962be7d22fSVladimir Kondratiev } 8972be7d22fSVladimir Kondratiev 898fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 899fb3cac57SVladimir Kondratiev struct sk_buff *skb); 90054ed90a8SVladimir Kondratiev 90154ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 90254ed90a8SVladimir Kondratiev struct sk_buff *skb) 90354ed90a8SVladimir Kondratiev { 90454ed90a8SVladimir Kondratiev struct vring *v; 90554ed90a8SVladimir Kondratiev int i; 90654ed90a8SVladimir Kondratiev u8 cid; 90754ed90a8SVladimir Kondratiev 90854ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 90954ed90a8SVladimir Kondratiev * for the AP we connected to. 910230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 91154ed90a8SVladimir Kondratiev */ 91254ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 91354ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 91454ed90a8SVladimir Kondratiev if (!v->va) 91554ed90a8SVladimir Kondratiev continue; 91654ed90a8SVladimir Kondratiev 91754ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 91841d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 91941d6b093SVladimir Kondratiev continue; 92041d6b093SVladimir Kondratiev 921230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 92254ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 923230d8442SVladimir Kondratiev continue; 92454ed90a8SVladimir Kondratiev 92554ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 92654ed90a8SVladimir Kondratiev 92754ed90a8SVladimir Kondratiev return v; 92854ed90a8SVladimir Kondratiev } 92954ed90a8SVladimir Kondratiev 93054ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 93154ed90a8SVladimir Kondratiev 93254ed90a8SVladimir Kondratiev return NULL; 93354ed90a8SVladimir Kondratiev } 93454ed90a8SVladimir Kondratiev 93570812421SVladimir Kondratiev /* Use one of 2 strategies: 93670812421SVladimir Kondratiev * 93770812421SVladimir Kondratiev * 1. New (real broadcast): 93870812421SVladimir Kondratiev * use dedicated broadcast vring 93970812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 94070812421SVladimir Kondratiev * Find 1-st vring and return it; 94170812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 94270812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 94370812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 94470812421SVladimir Kondratiev * - for PBSS 94570812421SVladimir Kondratiev */ 94670812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 947fb3cac57SVladimir Kondratiev struct sk_buff *skb) 948fb3cac57SVladimir Kondratiev { 94941d6b093SVladimir Kondratiev struct vring *v; 95041d6b093SVladimir Kondratiev int i = wil->bcast_vring; 951fb3cac57SVladimir Kondratiev 95241d6b093SVladimir Kondratiev if (i < 0) 95341d6b093SVladimir Kondratiev return NULL; 954fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 955e58c9f70SVladimir Kondratiev if (!v->va) 956fb3cac57SVladimir Kondratiev return NULL; 957230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 958230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 959230d8442SVladimir Kondratiev return NULL; 960fb3cac57SVladimir Kondratiev 961fb3cac57SVladimir Kondratiev return v; 962fb3cac57SVladimir Kondratiev } 963fb3cac57SVladimir Kondratiev 96470812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 96570812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 96670812421SVladimir Kondratiev { 96770812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 96870812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 96970812421SVladimir Kondratiev 97070812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 97170812421SVladimir Kondratiev } 97270812421SVladimir Kondratiev 97370812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 97470812421SVladimir Kondratiev struct sk_buff *skb) 97570812421SVladimir Kondratiev { 97670812421SVladimir Kondratiev struct vring *v, *v2; 97770812421SVladimir Kondratiev struct sk_buff *skb2; 97870812421SVladimir Kondratiev int i; 97970812421SVladimir Kondratiev u8 cid; 98070812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 98170812421SVladimir Kondratiev char *src = eth->h_source; 98270812421SVladimir Kondratiev 98370812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 98470812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 98570812421SVladimir Kondratiev v = &wil->vring_tx[i]; 98670812421SVladimir Kondratiev if (!v->va) 98770812421SVladimir Kondratiev continue; 98870812421SVladimir Kondratiev 98970812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 99070812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 99170812421SVladimir Kondratiev continue; 992230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 993230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 99470812421SVladimir Kondratiev continue; 99570812421SVladimir Kondratiev 99670812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 99770812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 99870812421SVladimir Kondratiev continue; 99970812421SVladimir Kondratiev 100070812421SVladimir Kondratiev goto found; 100170812421SVladimir Kondratiev } 100270812421SVladimir Kondratiev 100370812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 100470812421SVladimir Kondratiev 100570812421SVladimir Kondratiev return NULL; 100670812421SVladimir Kondratiev 100770812421SVladimir Kondratiev found: 100870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 100970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 101070812421SVladimir Kondratiev 101170812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 101270812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 101370812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 101470812421SVladimir Kondratiev if (!v2->va) 101570812421SVladimir Kondratiev continue; 101670812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 101770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 101870812421SVladimir Kondratiev continue; 1019230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1020230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 102170812421SVladimir Kondratiev continue; 102270812421SVladimir Kondratiev 102370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 102470812421SVladimir Kondratiev continue; 102570812421SVladimir Kondratiev 102670812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 102770812421SVladimir Kondratiev if (skb2) { 102870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 102970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 103070812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 103170812421SVladimir Kondratiev } else { 103270812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 103370812421SVladimir Kondratiev } 103470812421SVladimir Kondratiev } 103570812421SVladimir Kondratiev 103670812421SVladimir Kondratiev return v; 103770812421SVladimir Kondratiev } 103870812421SVladimir Kondratiev 103970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 104070812421SVladimir Kondratiev struct sk_buff *skb) 104170812421SVladimir Kondratiev { 104270812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 104370812421SVladimir Kondratiev 104470812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 104570812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 104670812421SVladimir Kondratiev 104770812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 104870812421SVladimir Kondratiev } 104970812421SVladimir Kondratiev 105099b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 105199b55bd2SKirshenbaum Erez int vring_index) 10522be7d22fSVladimir Kondratiev { 105368ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 10542be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 10552be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 10562be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 10572be7d22fSVladimir Kondratiev d->dma.error = 0; 10582be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 10597e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 106099b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 10612be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 10622be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 10632be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 10642be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 10652be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 10662be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 10672be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 10682be7d22fSVladimir Kondratiev 10692be7d22fSVladimir Kondratiev return 0; 10702be7d22fSVladimir Kondratiev } 10712be7d22fSVladimir Kondratiev 1072c236658fSVladimir Kondratiev static inline 1073c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1074c236658fSVladimir Kondratiev { 10753d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1076c236658fSVladimir Kondratiev } 1077c236658fSVladimir Kondratiev 10783d4bde15SVladimir Kondratiev /** 10793d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 10803d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 10813d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 10823d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 10833d4bde15SVladimir Kondratiev */ 10843d4bde15SVladimir Kondratiev 10853d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 10863d4bde15SVladimir Kondratiev struct sk_buff *skb, 10873d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 10883d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1089504937d4SKirshenbaum Erez { 10903d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 10913d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 10923d4bde15SVladimir Kondratiev 10933d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 10943d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 10953d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 10963d4bde15SVladimir Kondratiev 10973d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 10983d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 10993d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 11003d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 11013d4bde15SVladimir Kondratiev 11023d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 11033d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 11043d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 11053d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 11063d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 11073d4bde15SVladimir Kondratiev } 11083d4bde15SVladimir Kondratiev 11093d4bde15SVladimir Kondratiev /** 11103d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 11113d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 11123d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 11133d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 11143d4bde15SVladimir Kondratiev * 11153d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 11163d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 11173d4bde15SVladimir Kondratiev */ 11183d4bde15SVladimir Kondratiev 11193d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 11203d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1121504937d4SKirshenbaum Erez int protocol; 1122504937d4SKirshenbaum Erez 1123504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1124504937d4SKirshenbaum Erez return 0; 1125504937d4SKirshenbaum Erez 1126df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1127df2d08eeSVladimir Kondratiev 1128504937d4SKirshenbaum Erez switch (skb->protocol) { 1129504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1130504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1131df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1132504937d4SKirshenbaum Erez break; 1133504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1134504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1135504937d4SKirshenbaum Erez break; 1136504937d4SKirshenbaum Erez default: 1137504937d4SKirshenbaum Erez return -EINVAL; 1138504937d4SKirshenbaum Erez } 1139504937d4SKirshenbaum Erez 1140504937d4SKirshenbaum Erez switch (protocol) { 1141504937d4SKirshenbaum Erez case IPPROTO_TCP: 1142504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1143504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1144504937d4SKirshenbaum Erez d->dma.d0 |= 1145504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1146504937d4SKirshenbaum Erez break; 1147504937d4SKirshenbaum Erez case IPPROTO_UDP: 1148504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1149504937d4SKirshenbaum Erez d->dma.d0 |= 1150504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1151504937d4SKirshenbaum Erez break; 1152504937d4SKirshenbaum Erez default: 1153504937d4SKirshenbaum Erez return -EINVAL; 1154504937d4SKirshenbaum Erez } 1155504937d4SKirshenbaum Erez 1156504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1157504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1158504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1159504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1160504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1161504937d4SKirshenbaum Erez 1162504937d4SKirshenbaum Erez return 0; 1163504937d4SKirshenbaum Erez } 1164504937d4SKirshenbaum Erez 11653d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 11663d4bde15SVladimir Kondratiev { 11673d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 11683d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 11693d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 11703d4bde15SVladimir Kondratiev } 11713d4bde15SVladimir Kondratiev 11723d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 11733d4bde15SVladimir Kondratiev { 11743d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 11753d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 11763d4bde15SVladimir Kondratiev } 11773d4bde15SVladimir Kondratiev 11783d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 11793d4bde15SVladimir Kondratiev struct sk_buff *skb) 11803d4bde15SVladimir Kondratiev { 11813d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 11823d4bde15SVladimir Kondratiev 11833d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 11843d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 11853d4bde15SVladimir Kondratiev *_first_desc = NULL; 11863d4bde15SVladimir Kondratiev 11873d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 11883d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 11893d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 11903d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 11913d4bde15SVladimir Kondratiev 11923d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 11933d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 11943d4bde15SVladimir Kondratiev 11953d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 11963d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 11973d4bde15SVladimir Kondratiev 11983d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 11993d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 12003d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 12013d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 12023d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 12033d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 12043d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 12053d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 12063d4bde15SVladimir Kondratiev uint i = swhead; 12073d4bde15SVladimir Kondratiev dma_addr_t pa; 12083d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 12093d4bde15SVladimir Kondratiev int rem_data = mss; 12103d4bde15SVladimir Kondratiev int lenmss; 12113d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 12123d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 12133d4bde15SVladimir Kondratiev bool is_ipv4; 12143d4bde15SVladimir Kondratiev int tcp_hdr_len; 12153d4bde15SVladimir Kondratiev int skb_net_hdr_len; 12163d4bde15SVladimir Kondratiev int gso_type; 12173d4bde15SVladimir Kondratiev 12183d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 12193d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 12203d4bde15SVladimir Kondratiev 12213d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 12223d4bde15SVladimir Kondratiev return -EINVAL; 12233d4bde15SVladimir Kondratiev 12243d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 12253d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 12263d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 12273d4bde15SVladimir Kondratiev * this is the initial check only. 12283d4bde15SVladimir Kondratiev */ 12293d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 12303d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 12313d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 12323d4bde15SVladimir Kondratiev vring_index, min_desc_required); 12333d4bde15SVladimir Kondratiev return -ENOMEM; 12343d4bde15SVladimir Kondratiev } 12353d4bde15SVladimir Kondratiev 12363d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 12373d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 12383d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 12393d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 12403d4bde15SVladimir Kondratiev 12413d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 12423d4bde15SVladimir Kondratiev switch (gso_type) { 12433d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 12443d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 12453d4bde15SVladimir Kondratiev * as required by the offloading doc 12463d4bde15SVladimir Kondratiev */ 12473d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 12483d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 12493d4bde15SVladimir Kondratiev is_ipv4 = true; 12503d4bde15SVladimir Kondratiev break; 12513d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 12523d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 12533d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 12543d4bde15SVladimir Kondratiev is_ipv4 = false; 12553d4bde15SVladimir Kondratiev break; 12563d4bde15SVladimir Kondratiev default: 12573d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 12583d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 12593d4bde15SVladimir Kondratiev */ 12603d4bde15SVladimir Kondratiev return -EINVAL; 12613d4bde15SVladimir Kondratiev } 12623d4bde15SVladimir Kondratiev 12633d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 12643d4bde15SVladimir Kondratiev return -EINVAL; 12653d4bde15SVladimir Kondratiev 12663d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 12673d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 12683d4bde15SVladimir Kondratiev */ 12693d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 12703d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 12713d4bde15SVladimir Kondratiev 12723d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 12733d4bde15SVladimir Kondratiev 12743d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 12753d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 12763d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 12773d4bde15SVladimir Kondratiev goto err_exit; 12783d4bde15SVladimir Kondratiev } 12793d4bde15SVladimir Kondratiev 12803d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 12813d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 12823d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 12833d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 12843d4bde15SVladimir Kondratiev 12853d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 12863d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 12873d4bde15SVladimir Kondratiev 12883d4bde15SVladimir Kondratiev descs_used++; 12893d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 12903d4bde15SVladimir Kondratiev 12913d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 12923d4bde15SVladimir Kondratiev if (headlen) { 12933d4bde15SVladimir Kondratiev len = headlen; 12943d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 12953d4bde15SVladimir Kondratiev len); 12963d4bde15SVladimir Kondratiev } else { 12973d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 12983d4bde15SVladimir Kondratiev len = frag->size; 12993d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 13003d4bde15SVladimir Kondratiev } 13013d4bde15SVladimir Kondratiev 13023d4bde15SVladimir Kondratiev while (len) { 13033d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 13043d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 13053d4bde15SVladimir Kondratiev len, rem_data, descs_used); 13063d4bde15SVladimir Kondratiev 13073d4bde15SVladimir Kondratiev if (descs_used == avail) { 13083d4bde15SVladimir Kondratiev wil_err(wil, "TSO: ring overflow\n"); 13093d4bde15SVladimir Kondratiev goto dma_error; 13103d4bde15SVladimir Kondratiev } 13113d4bde15SVladimir Kondratiev 13123d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 13133d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 13143d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 13153d4bde15SVladimir Kondratiev 13163d4bde15SVladimir Kondratiev if (!headlen) { 13173d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 13183d4bde15SVladimir Kondratiev frag->size - len, lenmss, 13193d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13203d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 13213d4bde15SVladimir Kondratiev } else { 13223d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 13233d4bde15SVladimir Kondratiev skb->data + 13243d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 13253d4bde15SVladimir Kondratiev lenmss, 13263d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13273d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 13283d4bde15SVladimir Kondratiev headlen -= lenmss; 13293d4bde15SVladimir Kondratiev } 13303d4bde15SVladimir Kondratiev 13313d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 13323d4bde15SVladimir Kondratiev goto dma_error; 13333d4bde15SVladimir Kondratiev 13343d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 13353d4bde15SVladimir Kondratiev 13363d4bde15SVladimir Kondratiev if (!_first_desc) { 13373d4bde15SVladimir Kondratiev _first_desc = _desc; 13383d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 13393d4bde15SVladimir Kondratiev d = first_desc; 13403d4bde15SVladimir Kondratiev } else { 13413d4bde15SVladimir Kondratiev d = &desc_mem; 13423d4bde15SVladimir Kondratiev } 13433d4bde15SVladimir Kondratiev 13443d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 13453d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 13463d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 13473d4bde15SVladimir Kondratiev skb_net_hdr_len); 13483d4bde15SVladimir Kondratiev 13493d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 13503d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 13513d4bde15SVladimir Kondratiev 13523d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 13533d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 13543d4bde15SVladimir Kondratiev len -= lenmss; 13553d4bde15SVladimir Kondratiev rem_data -= lenmss; 13563d4bde15SVladimir Kondratiev 13573d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 13583d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 13593d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 13603d4bde15SVladimir Kondratiev 13613d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 13623d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 13633d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 13643d4bde15SVladimir Kondratiev /* first segment include hdr desc for 13653d4bde15SVladimir Kondratiev * release 13663d4bde15SVladimir Kondratiev */ 13673d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 13683d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 13693d4bde15SVladimir Kondratiev sg_desc_cnt + 13703d4bde15SVladimir Kondratiev 1); 13713d4bde15SVladimir Kondratiev hdr_compensation_need = false; 13723d4bde15SVladimir Kondratiev } else { 13733d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 13743d4bde15SVladimir Kondratiev sg_desc_cnt); 13753d4bde15SVladimir Kondratiev } 13763d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 13773d4bde15SVladimir Kondratiev 13783d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 13793d4bde15SVladimir Kondratiev 13803d4bde15SVladimir Kondratiev /* first descriptor may also be the last 13813d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 13823d4bde15SVladimir Kondratiev * it twice 13833d4bde15SVladimir Kondratiev */ 13843d4bde15SVladimir Kondratiev if (first_desc != d) 13853d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 13863d4bde15SVladimir Kondratiev 13873d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 13883d4bde15SVladimir Kondratiev * of this TS processing 13893d4bde15SVladimir Kondratiev */ 13903d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 13913d4bde15SVladimir Kondratiev *_desc = *d; 13923d4bde15SVladimir Kondratiev 13933d4bde15SVladimir Kondratiev rem_data = mss; 13943d4bde15SVladimir Kondratiev _first_desc = NULL; 13953d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 13963d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 13973d4bde15SVladimir Kondratiev *_desc = *d; 13983d4bde15SVladimir Kondratiev } 13993d4bde15SVladimir Kondratiev } 14003d4bde15SVladimir Kondratiev 14013d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 14023d4bde15SVladimir Kondratiev * in this case d pointer is invalid 14033d4bde15SVladimir Kondratiev */ 14043d4bde15SVladimir Kondratiev if (_first_desc == _desc) 14053d4bde15SVladimir Kondratiev d = first_desc; 14063d4bde15SVladimir Kondratiev 14073d4bde15SVladimir Kondratiev /* Last data descriptor */ 14083d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 14093d4bde15SVladimir Kondratiev *_desc = *d; 14103d4bde15SVladimir Kondratiev 14113d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 14123d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 14133d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 14143d4bde15SVladimir Kondratiev 14153d4bde15SVladimir Kondratiev /* hold reference to skb 14163d4bde15SVladimir Kondratiev * to prevent skb release before accounting 14173d4bde15SVladimir Kondratiev * in case of immediate "tx done" 14183d4bde15SVladimir Kondratiev */ 14193d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 14203d4bde15SVladimir Kondratiev 14213d4bde15SVladimir Kondratiev /* performance monitoring */ 14223d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 14233d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 14243d4bde15SVladimir Kondratiev used, used + descs_used)) { 14253d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 14263d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 14273d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 14283d4bde15SVladimir Kondratiev } 14293d4bde15SVladimir Kondratiev 14303d4bde15SVladimir Kondratiev /* advance swhead */ 14313d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 14323d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 14333d4bde15SVladimir Kondratiev 14343d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 14353d4bde15SVladimir Kondratiev * committing them to HW 14363d4bde15SVladimir Kondratiev */ 14373d4bde15SVladimir Kondratiev wmb(); 14383d4bde15SVladimir Kondratiev 1439b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 14403d4bde15SVladimir Kondratiev return 0; 14413d4bde15SVladimir Kondratiev 14423d4bde15SVladimir Kondratiev dma_error: 14433d4bde15SVladimir Kondratiev wil_err(wil, "TSO: DMA map page error\n"); 14443d4bde15SVladimir Kondratiev while (descs_used > 0) { 14453d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 14463d4bde15SVladimir Kondratiev 14473d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14483d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 14493d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14503d4bde15SVladimir Kondratiev *d = *_desc; 14513d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 14523d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 14533d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 14543d4bde15SVladimir Kondratiev if (ctx->skb) 14553d4bde15SVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 14563d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 14573d4bde15SVladimir Kondratiev descs_used--; 14583d4bde15SVladimir Kondratiev } 14593d4bde15SVladimir Kondratiev 14603d4bde15SVladimir Kondratiev err_exit: 14613d4bde15SVladimir Kondratiev return -EINVAL; 14623d4bde15SVladimir Kondratiev } 14633d4bde15SVladimir Kondratiev 14645933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 14652be7d22fSVladimir Kondratiev struct sk_buff *skb) 14662be7d22fSVladimir Kondratiev { 14672be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 146868ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 146968ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 14702be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 14712be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 14722be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1473504937d4SKirshenbaum Erez uint f = 0; 14742be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 14757c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 14762be7d22fSVladimir Kondratiev uint i = swhead; 14772be7d22fSVladimir Kondratiev dma_addr_t pa; 14780436fd9aSVladimir Shulman int used; 147941d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 148041d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 14812be7d22fSVladimir Kondratiev 14823d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 14833d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 14842be7d22fSVladimir Kondratiev 14855933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 14865933a06dSVladimir Kondratiev return -EINVAL; 14875933a06dSVladimir Kondratiev 148833c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 148970801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 14905b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 14915b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 14922be7d22fSVladimir Kondratiev return -ENOMEM; 14932be7d22fSVladimir Kondratiev } 14948fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 14952be7d22fSVladimir Kondratiev 14968fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 14972be7d22fSVladimir Kondratiev 14985b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 14995b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 15007743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 15012be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 15022be7d22fSVladimir Kondratiev 15032be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 15042be7d22fSVladimir Kondratiev return -EINVAL; 15052232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15062be7d22fSVladimir Kondratiev /* 1-st segment */ 150741d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 150841d6b093SVladimir Kondratiev if (unlikely(mcast)) { 150941d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1510230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 151141d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 151241d6b093SVladimir Kondratiev } 1513504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 15143d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 15155b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1516504937d4SKirshenbaum Erez vring_index); 1517504937d4SKirshenbaum Erez goto dma_error; 1518504937d4SKirshenbaum Erez } 1519504937d4SKirshenbaum Erez 1520c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 15213d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 152268ada71eSVladimir Kondratiev 15232be7d22fSVladimir Kondratiev /* middle segments */ 1524504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 15252be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 15262be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 15272be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 15288fe59627SVladimir Kondratiev 1529e59d16c0SVladimir Kondratiev *_d = *d; 15305b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15315b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15325b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15332be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 15348fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 15352be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 15362be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 15372be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 15382be7d22fSVladimir Kondratiev goto dma_error; 15392232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 154099b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1541c236658fSVladimir Kondratiev /* no need to check return code - 1542c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1543c236658fSVladimir Kondratiev * it will succeed here too 1544c236658fSVladimir Kondratiev */ 15453d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 15462be7d22fSVladimir Kondratiev } 15472be7d22fSVladimir Kondratiev /* for the last seg only */ 15482be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1549668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 15502be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 155168ada71eSVladimir Kondratiev *_d = *d; 15525b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15535b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15545b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15552be7d22fSVladimir Kondratiev 15566cdadd4dSVladimir Kondratiev /* hold reference to skb 15576cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 15586cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 15596cdadd4dSVladimir Kondratiev */ 15606cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15616cdadd4dSVladimir Kondratiev 15620436fd9aSVladimir Shulman /* performance monitoring */ 15630436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 15640436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 15650436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 15667c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15670436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15680436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 15690436fd9aSVladimir Shulman } 15707c0acf86SVladimir Kondratiev 15712be7d22fSVladimir Kondratiev /* advance swhead */ 15722be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 15735b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 15745b29c573SVladimir Kondratiev vring->swhead); 157598658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 15763d4bde15SVladimir Kondratiev 15773d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 15783d4bde15SVladimir Kondratiev * committing them to HW 15793d4bde15SVladimir Kondratiev */ 15803d4bde15SVladimir Kondratiev wmb(); 15813d4bde15SVladimir Kondratiev 1582b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 15832be7d22fSVladimir Kondratiev 15842be7d22fSVladimir Kondratiev return 0; 15852be7d22fSVladimir Kondratiev dma_error: 15862be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1587c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1588c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1589c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 15907e594444SVladimir Kondratiev 15912be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1592c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 15938fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 159468ada71eSVladimir Kondratiev *d = *_d; 159568ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 15962232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1597f88f113aSVladimir Kondratiev 1598f88f113aSVladimir Kondratiev if (ctx->skb) 1599f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 1600f88f113aSVladimir Kondratiev 1601f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16022be7d22fSVladimir Kondratiev } 16032be7d22fSVladimir Kondratiev 16042be7d22fSVladimir Kondratiev return -EINVAL; 16052be7d22fSVladimir Kondratiev } 16062be7d22fSVladimir Kondratiev 16075933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16085933a06dSVladimir Kondratiev struct sk_buff *skb) 16095933a06dSVladimir Kondratiev { 16105933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16115933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16125933a06dSVladimir Kondratiev int rc; 16135933a06dSVladimir Kondratiev 16145933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 16153d4bde15SVladimir Kondratiev 16163d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 16173d4bde15SVladimir Kondratiev (wil, vring, skb); 16183d4bde15SVladimir Kondratiev 16195933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 16203d4bde15SVladimir Kondratiev 16215933a06dSVladimir Kondratiev return rc; 16225933a06dSVladimir Kondratiev } 16235933a06dSVladimir Kondratiev 16242be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 16252be7d22fSVladimir Kondratiev { 16262be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 16273df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 162841d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 16292be7d22fSVladimir Kondratiev struct vring *vring; 1630aa27deaaSVladimir Kondratiev static bool pr_once_fw; 16312be7d22fSVladimir Kondratiev int rc; 16322be7d22fSVladimir Kondratiev 16337743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 163433c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1635aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 16362be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1637aa27deaaSVladimir Kondratiev pr_once_fw = true; 1638aa27deaaSVladimir Kondratiev } 16392be7d22fSVladimir Kondratiev goto drop; 16402be7d22fSVladimir Kondratiev } 164133c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 16422be7d22fSVladimir Kondratiev wil_err(wil, "FW not connected\n"); 16432be7d22fSVladimir Kondratiev goto drop; 16442be7d22fSVladimir Kondratiev } 164533c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 16462be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 16472be7d22fSVladimir Kondratiev goto drop; 16482be7d22fSVladimir Kondratiev } 1649aa27deaaSVladimir Kondratiev pr_once_fw = false; 1650d58db4e4SVladimir Kondratiev 16512be7d22fSVladimir Kondratiev /* find vring */ 165254ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 165354ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 165454ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 165554ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 165641d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 165741d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 165854ed90a8SVladimir Kondratiev } 165933c477fdSVladimir Kondratiev if (unlikely(!vring)) { 16605aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 16612be7d22fSVladimir Kondratiev goto drop; 16622be7d22fSVladimir Kondratiev } 16632be7d22fSVladimir Kondratiev /* set up vring entry */ 16642be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1665d58db4e4SVladimir Kondratiev 16662232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 166733c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 16682232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 166955f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 167055f8f680SVladimir Kondratiev } 16712232abd5SVladimir Kondratiev 16722be7d22fSVladimir Kondratiev switch (rc) { 16732be7d22fSVladimir Kondratiev case 0: 1674795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 16752be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 16762be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 16772be7d22fSVladimir Kondratiev case -ENOMEM: 16782be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 16792be7d22fSVladimir Kondratiev default: 1680afda8bb5SVladimir Kondratiev break; /* goto drop; */ 16812be7d22fSVladimir Kondratiev } 16822be7d22fSVladimir Kondratiev drop: 16832be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 16842be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 16852be7d22fSVladimir Kondratiev 16862be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 16872be7d22fSVladimir Kondratiev } 16882be7d22fSVladimir Kondratiev 1689713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1690713c8a29SVladimir Kondratiev { 1691713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1692713c8a29SVladimir Kondratiev 1693713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1694713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1695713c8a29SVladimir Kondratiev } 1696713c8a29SVladimir Kondratiev 1697713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1698713c8a29SVladimir Kondratiev { 1699713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1700713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1701713c8a29SVladimir Kondratiev else 1702713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1703713c8a29SVladimir Kondratiev } 1704713c8a29SVladimir Kondratiev 17052be7d22fSVladimir Kondratiev /** 17062be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 17072be7d22fSVladimir Kondratiev * 1708e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1709e0287c4aSVladimir Kondratiev * 17102be7d22fSVladimir Kondratiev * Safe to call from IRQ 17112be7d22fSVladimir Kondratiev */ 1712e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 17132be7d22fSVladimir Kondratiev { 1714795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 17152be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17162be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1717097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1718e0287c4aSVladimir Kondratiev int done = 0; 1719c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 172041d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1721c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17220436fd9aSVladimir Shulman int used_before_complete; 17230436fd9aSVladimir Shulman int used_new; 17242be7d22fSVladimir Kondratiev 172533c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 17262be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1727e0287c4aSVladimir Kondratiev return 0; 17282be7d22fSVladimir Kondratiev } 17292be7d22fSVladimir Kondratiev 173033c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1731097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1732097638a0SVladimir Kondratiev return 0; 1733097638a0SVladimir Kondratiev } 1734097638a0SVladimir Kondratiev 17357743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 17362be7d22fSVladimir Kondratiev 17370436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 17380436fd9aSVladimir Shulman 173941d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 174041d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 174141d6b093SVladimir Kondratiev 17422be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1743c236658fSVladimir Kondratiev int new_swtail; 1744c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1745c236658fSVladimir Kondratiev /** 1746c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 17473d4bde15SVladimir Kondratiev * last fragment. look for it. 17483d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1749c236658fSVladimir Kondratiev */ 1750c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1751c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1752c236658fSVladimir Kondratiev 1753c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 175433c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1755c236658fSVladimir Kondratiev break; 1756c236658fSVladimir Kondratiev 1757c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1758c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 17594de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 17607e594444SVladimir Kondratiev u16 dmalen; 176176dfa4b7SVladimir Kondratiev struct sk_buff *skb; 176276dfa4b7SVladimir Kondratiev 176376dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 176476dfa4b7SVladimir Kondratiev skb = ctx->skb; 1765c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 17664de41befSVladimir Kondratiev 176768ada71eSVladimir Kondratiev *d = *_d; 17684de41befSVladimir Kondratiev 17697e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 177098658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 177198658095SVladimir Kondratiev d->dma.error); 17727743882dSVladimir Kondratiev wil_dbg_txrx(wil, 17735b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 17745b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 17755b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 17765b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 17772be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 17782be7d22fSVladimir Kondratiev 17792232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1780f88f113aSVladimir Kondratiev 17812be7d22fSVladimir Kondratiev if (skb) { 178233c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1783795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1784795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 178541d6b093SVladimir Kondratiev if (stats) { 178641d6b093SVladimir Kondratiev stats->tx_packets++; 1787c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 178841d6b093SVladimir Kondratiev } 1789795ce734SVladimir Kondratiev } else { 1790795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 179141d6b093SVladimir Kondratiev if (stats) 1792c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1793795ce734SVladimir Kondratiev } 1794713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 17952be7d22fSVladimir Kondratiev } 1796f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1797c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 179803269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 179903269c65SVladimir Kondratiev * so hardware will not try to process this desc., 180003269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 180103269c65SVladimir Kondratiev */ 18022be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1803e0287c4aSVladimir Kondratiev done++; 18042be7d22fSVladimir Kondratiev } 1805c236658fSVladimir Kondratiev } 180667c3e1b4SVladimir Kondratiev 18070436fd9aSVladimir Shulman /* performance monitoring */ 18080436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 18090436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 18100436fd9aSVladimir Shulman used_new, used_before_complete)) { 18110436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 18120436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 18137c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 18147c0acf86SVladimir Kondratiev } 181567c3e1b4SVladimir Kondratiev 181655f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 181755f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 18182be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 181955f8f680SVladimir Kondratiev } 1820e0287c4aSVladimir Kondratiev 1821e0287c4aSVladimir Kondratiev return done; 18222be7d22fSVladimir Kondratiev } 1823