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; 382148416a9SVladimir Kondratiev int i = (int)vring->swhead; 383c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 384c8b78b5fSVladimir Kondratiev 38533e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 38633e61169SVladimir Kondratiev 38733c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 3882be7d22fSVladimir Kondratiev return NULL; 3892be7d22fSVladimir Kondratiev 390148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 39133c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 3922be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 3932be7d22fSVladimir Kondratiev return NULL; 3942be7d22fSVladimir Kondratiev } 3952be7d22fSVladimir Kondratiev 396148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 397148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 398148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 399148416a9SVladimir Kondratiev if (!skb) { 400148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 401148416a9SVladimir Kondratiev return NULL; 402148416a9SVladimir Kondratiev } 40368ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 40468ada71eSVladimir Kondratiev *d = *_d; 40568ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 40668ada71eSVladimir Kondratiev 40768ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 40868ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 40968ada71eSVladimir Kondratiev 410148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 411148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 41268ada71eSVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_NONE, 32, 4, 41368ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 41468ada71eSVladimir Kondratiev 41533c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 416e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 417110dea00SWei Yongjun kfree_skb(skb); 418e270045bSVladimir Kondratiev return NULL; 419e270045bSVladimir Kondratiev } 4207e594444SVladimir Kondratiev skb_trim(skb, dmalen); 42133e61169SVladimir Kondratiev 4221cbbcb08SVladimir Kondratiev prefetch(skb->data); 4231cbbcb08SVladimir Kondratiev 424c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 425c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 426c0d37713SVladimir Kondratiev 427c8b78b5fSVladimir Kondratiev cid = wil_rxdesc_cid(d); 428c8b78b5fSVladimir Kondratiev stats = &wil->sta[cid].stats; 429c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 430c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 431c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4322be7d22fSVladimir Kondratiev 4332be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4342be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 43533e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4362be7d22fSVladimir Kondratiev 4372be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4382be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4392be7d22fSVladimir Kondratiev return skb; 4402be7d22fSVladimir Kondratiev /* 4412be7d22fSVladimir Kondratiev * Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4422be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4432be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4442be7d22fSVladimir Kondratiev */ 44568ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 44633c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 4477743882dSVladimir Kondratiev wil_dbg_txrx(wil, "Non-data frame ftype 0x%08x\n", ftype); 4482be7d22fSVladimir Kondratiev /* TODO: process it */ 4492be7d22fSVladimir Kondratiev kfree_skb(skb); 4502be7d22fSVladimir Kondratiev return NULL; 4512be7d22fSVladimir Kondratiev } 4522be7d22fSVladimir Kondratiev 453c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 4542be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 4552be7d22fSVladimir Kondratiev /* TODO: process it (i.e. BAR) */ 4562be7d22fSVladimir Kondratiev kfree_skb(skb); 4572be7d22fSVladimir Kondratiev return NULL; 4582be7d22fSVladimir Kondratiev } 4592be7d22fSVladimir Kondratiev 460504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 461504937d4SKirshenbaum Erez * and in case of error drop the packet 462504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 463504937d4SKirshenbaum Erez */ 46433c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 465504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 46633c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 467504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 4684a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 4694a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 4704a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 4714a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 4724a68ab10SVladimir Kondratiev */ 473504937d4SKirshenbaum Erez } 474504937d4SKirshenbaum Erez 475c406ea7cSVladimir Kondratiev if (snaplen) { 476c406ea7cSVladimir Kondratiev /* Packet layout 477c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 478c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 479c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 480c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 481c406ea7cSVladimir Kondratiev */ 482c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 483c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 484c406ea7cSVladimir Kondratiev } 485c406ea7cSVladimir Kondratiev 4862be7d22fSVladimir Kondratiev return skb; 4872be7d22fSVladimir Kondratiev } 4882be7d22fSVladimir Kondratiev 4892be7d22fSVladimir Kondratiev /** 4902be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 4912be7d22fSVladimir Kondratiev * buffers posted at @swtail 4922be7d22fSVladimir Kondratiev */ 4932be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 4942be7d22fSVladimir Kondratiev { 4952be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 4962be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 4972be7d22fSVladimir Kondratiev u32 next_tail; 4982be7d22fSVladimir Kondratiev int rc = 0; 4992be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5002be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5012be7d22fSVladimir Kondratiev 5022be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5032be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5042be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5052be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 50633c477fdSVladimir Kondratiev if (unlikely(rc)) { 5072be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5082be7d22fSVladimir Kondratiev rc, v->swtail); 5092be7d22fSVladimir Kondratiev break; 5102be7d22fSVladimir Kondratiev } 5112be7d22fSVladimir Kondratiev } 5122be7d22fSVladimir Kondratiev iowrite32(v->swtail, wil->csr + HOSTADDR(v->hwtail)); 5132be7d22fSVladimir Kondratiev 5142be7d22fSVladimir Kondratiev return rc; 5152be7d22fSVladimir Kondratiev } 5162be7d22fSVladimir Kondratiev 5172be7d22fSVladimir Kondratiev /* 5182be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 519e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 5202be7d22fSVladimir Kondratiev */ 521b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 5222be7d22fSVladimir Kondratiev { 523c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 524c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 525c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 5262be7d22fSVladimir Kondratiev unsigned int len = skb->len; 527c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 52841d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 529c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 530c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 531c42da999SVladimir Kondratiev * is not suitable, need to look at data 532c42da999SVladimir Kondratiev */ 533c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 534c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 535c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 536c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 537c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 538c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 539c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 540c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 541c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 542c42da999SVladimir Kondratiev }; 5432be7d22fSVladimir Kondratiev 544241804cbSVladimir Kondratiev skb_orphan(skb); 545241804cbSVladimir Kondratiev 54602beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 547c42da999SVladimir Kondratiev if (mcast) { 548c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 549c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 550c42da999SVladimir Kondratiev */ 551c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 552c42da999SVladimir Kondratiev } else { 553c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 5542be7d22fSVladimir Kondratiev 555c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 556c42da999SVladimir Kondratiev /* The destination station is associated to 557c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 558c42da999SVladimir Kondratiev * directly to it and do not pass it to local 559c42da999SVladimir Kondratiev * net stack. 560c42da999SVladimir Kondratiev */ 561c42da999SVladimir Kondratiev xmit_skb = skb; 562c42da999SVladimir Kondratiev skb = NULL; 563c42da999SVladimir Kondratiev } 564c42da999SVladimir Kondratiev } 565c42da999SVladimir Kondratiev } 566c42da999SVladimir Kondratiev if (xmit_skb) { 567c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 568c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 569c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 570c42da999SVladimir Kondratiev */ 571c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 572c42da999SVladimir Kondratiev xmit_skb->priority += 256; 573c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 574c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 575c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 576c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 577c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 578c42da999SVladimir Kondratiev } 579c42da999SVladimir Kondratiev 580c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 581c42da999SVladimir Kondratiev 582c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 583c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 584c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 585c42da999SVladimir Kondratiev len, gro_res_str[rc]); 586c42da999SVladimir Kondratiev } 587c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 588b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 589b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 590b5998e6aSVladimir Kondratiev stats->rx_dropped++; 591b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 592b5998e6aSVladimir Kondratiev } else { 5932be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 594c8b78b5fSVladimir Kondratiev stats->rx_packets++; 5952be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 596c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 597c42da999SVladimir Kondratiev if (mcast) 598c42da999SVladimir Kondratiev ndev->stats.multicast++; 599194b482bSVladimir Kondratiev } 6002be7d22fSVladimir Kondratiev } 6012be7d22fSVladimir Kondratiev 6022be7d22fSVladimir Kondratiev /** 6032be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 6042be7d22fSVladimir Kondratiev * 605e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 6062be7d22fSVladimir Kondratiev */ 607e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 6082be7d22fSVladimir Kondratiev { 6092be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 6102be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 6112be7d22fSVladimir Kondratiev struct sk_buff *skb; 6122be7d22fSVladimir Kondratiev 61333c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 6142be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 6152be7d22fSVladimir Kondratiev return; 6162be7d22fSVladimir Kondratiev } 6177743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 618e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 619e0287c4aSVladimir Kondratiev (*quota)--; 6202be7d22fSVladimir Kondratiev 6212be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 6222be7d22fSVladimir Kondratiev skb->dev = ndev; 6232be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 6242be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 6252be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 6262be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 627b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 6282be7d22fSVladimir Kondratiev } else { 629b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 6302be7d22fSVladimir Kondratiev } 6312be7d22fSVladimir Kondratiev } 6322be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 6332be7d22fSVladimir Kondratiev } 6342be7d22fSVladimir Kondratiev 635d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 6362be7d22fSVladimir Kondratiev { 6372be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 6382be7d22fSVladimir Kondratiev int rc; 6392be7d22fSVladimir Kondratiev 6409cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 6419cf10d62SVladimir Kondratiev 6428bf6adb9SVladimir Kondratiev if (vring->va) { 6438bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 6448bf6adb9SVladimir Kondratiev return -EINVAL; 6458bf6adb9SVladimir Kondratiev } 6468bf6adb9SVladimir Kondratiev 647d3762b40SVladimir Kondratiev vring->size = size; 6482be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 6492be7d22fSVladimir Kondratiev if (rc) 6502be7d22fSVladimir Kondratiev return rc; 6512be7d22fSVladimir Kondratiev 65247e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 6532be7d22fSVladimir Kondratiev if (rc) 6542be7d22fSVladimir Kondratiev goto err_free; 6552be7d22fSVladimir Kondratiev 6562be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 6572be7d22fSVladimir Kondratiev if (rc) 6582be7d22fSVladimir Kondratiev goto err_free; 6592be7d22fSVladimir Kondratiev 6602be7d22fSVladimir Kondratiev return 0; 6612be7d22fSVladimir Kondratiev err_free: 6622be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 6632be7d22fSVladimir Kondratiev 6642be7d22fSVladimir Kondratiev return rc; 6652be7d22fSVladimir Kondratiev } 6662be7d22fSVladimir Kondratiev 6672be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 6682be7d22fSVladimir Kondratiev { 6692be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 6702be7d22fSVladimir Kondratiev 6719cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 6729cf10d62SVladimir Kondratiev 6732acb4220SVladimir Kondratiev if (vring->va) 6742be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 6752be7d22fSVladimir Kondratiev } 6762be7d22fSVladimir Kondratiev 6772be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 6782be7d22fSVladimir Kondratiev int cid, int tid) 6792be7d22fSVladimir Kondratiev { 6802be7d22fSVladimir Kondratiev int rc; 6812be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 6822be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 6832be7d22fSVladimir Kondratiev .vring_cfg = { 6842be7d22fSVladimir Kondratiev .tx_sw_ring = { 6859a06bec9SVladimir Kondratiev .max_mpdu_size = 686c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 687b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 6882be7d22fSVladimir Kondratiev }, 6892be7d22fSVladimir Kondratiev .ringid = id, 690a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 6912be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 6922be7d22fSVladimir Kondratiev .mac_ctrl = 0, 6932be7d22fSVladimir Kondratiev .to_resolution = 0, 6943277213fSVladimir Kondratiev .agg_max_wsize = 0, 6952be7d22fSVladimir Kondratiev .schd_params = { 6962be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 6972be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 6982be7d22fSVladimir Kondratiev }, 6992be7d22fSVladimir Kondratiev }, 7002be7d22fSVladimir Kondratiev }; 7012be7d22fSVladimir Kondratiev struct { 7022be7d22fSVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 7032be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 7042be7d22fSVladimir Kondratiev } __packed reply; 7052be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 706097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 7072be7d22fSVladimir Kondratiev 708e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 709e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 7109cf10d62SVladimir Kondratiev 7112be7d22fSVladimir Kondratiev if (vring->va) { 7122be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 7132be7d22fSVladimir Kondratiev rc = -EINVAL; 7142be7d22fSVladimir Kondratiev goto out; 7152be7d22fSVladimir Kondratiev } 7162be7d22fSVladimir Kondratiev 717097638a0SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 7185933a06dSVladimir Kondratiev spin_lock_init(&txdata->lock); 7192be7d22fSVladimir Kondratiev vring->size = size; 7202be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7212be7d22fSVladimir Kondratiev if (rc) 7222be7d22fSVladimir Kondratiev goto out; 7232be7d22fSVladimir Kondratiev 72493ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 72593ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 72693ae6d49SVladimir Kondratiev 7272be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 7282be7d22fSVladimir Kondratiev 729230d8442SVladimir Kondratiev if (!wil->privacy) 730230d8442SVladimir Kondratiev txdata->dot1x_open = true; 7312be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 7322be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 7332be7d22fSVladimir Kondratiev if (rc) 7342be7d22fSVladimir Kondratiev goto out_free; 7352be7d22fSVladimir Kondratiev 736b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 7372be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 7382be7d22fSVladimir Kondratiev reply.cmd.status); 739c331997bSVladimir Kondratiev rc = -EINVAL; 7402be7d22fSVladimir Kondratiev goto out_free; 7412be7d22fSVladimir Kondratiev } 7422be7d22fSVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 7432be7d22fSVladimir Kondratiev 744097638a0SVladimir Kondratiev txdata->enabled = 1; 745230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 7463a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 747097638a0SVladimir Kondratiev 7482be7d22fSVladimir Kondratiev return 0; 7492be7d22fSVladimir Kondratiev out_free: 750230d8442SVladimir Kondratiev txdata->dot1x_open = false; 751230d8442SVladimir Kondratiev txdata->enabled = 0; 7522be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 7532be7d22fSVladimir Kondratiev out: 7542be7d22fSVladimir Kondratiev 7552be7d22fSVladimir Kondratiev return rc; 7562be7d22fSVladimir Kondratiev } 7572be7d22fSVladimir Kondratiev 75841d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 75941d6b093SVladimir Kondratiev { 76041d6b093SVladimir Kondratiev int rc; 76141d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 76241d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 76341d6b093SVladimir Kondratiev .vring_cfg = { 76441d6b093SVladimir Kondratiev .tx_sw_ring = { 76541d6b093SVladimir Kondratiev .max_mpdu_size = 76641d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 76741d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 76841d6b093SVladimir Kondratiev }, 76941d6b093SVladimir Kondratiev .ringid = id, 77041d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 77141d6b093SVladimir Kondratiev }, 77241d6b093SVladimir Kondratiev }; 77341d6b093SVladimir Kondratiev struct { 77441d6b093SVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 77541d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 77641d6b093SVladimir Kondratiev } __packed reply; 77741d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 77841d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 77941d6b093SVladimir Kondratiev 78041d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 78141d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 78241d6b093SVladimir Kondratiev 78341d6b093SVladimir Kondratiev if (vring->va) { 78441d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 78541d6b093SVladimir Kondratiev rc = -EINVAL; 78641d6b093SVladimir Kondratiev goto out; 78741d6b093SVladimir Kondratiev } 78841d6b093SVladimir Kondratiev 78941d6b093SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 79041d6b093SVladimir Kondratiev spin_lock_init(&txdata->lock); 79141d6b093SVladimir Kondratiev vring->size = size; 79241d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 79341d6b093SVladimir Kondratiev if (rc) 79441d6b093SVladimir Kondratiev goto out; 79541d6b093SVladimir Kondratiev 79641d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 79741d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 79841d6b093SVladimir Kondratiev 79941d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 80041d6b093SVladimir Kondratiev 801230d8442SVladimir Kondratiev if (!wil->privacy) 802230d8442SVladimir Kondratiev txdata->dot1x_open = true; 80341d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 80441d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 80541d6b093SVladimir Kondratiev if (rc) 80641d6b093SVladimir Kondratiev goto out_free; 80741d6b093SVladimir Kondratiev 80841d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 80941d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 81041d6b093SVladimir Kondratiev reply.cmd.status); 81141d6b093SVladimir Kondratiev rc = -EINVAL; 81241d6b093SVladimir Kondratiev goto out_free; 81341d6b093SVladimir Kondratiev } 81441d6b093SVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 81541d6b093SVladimir Kondratiev 81641d6b093SVladimir Kondratiev txdata->enabled = 1; 81741d6b093SVladimir Kondratiev 81841d6b093SVladimir Kondratiev return 0; 81941d6b093SVladimir Kondratiev out_free: 820230d8442SVladimir Kondratiev txdata->enabled = 0; 821230d8442SVladimir Kondratiev txdata->dot1x_open = false; 82241d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 82341d6b093SVladimir Kondratiev out: 82441d6b093SVladimir Kondratiev 82541d6b093SVladimir Kondratiev return rc; 82641d6b093SVladimir Kondratiev } 82741d6b093SVladimir Kondratiev 8282be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 8292be7d22fSVladimir Kondratiev { 8302be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 8313a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8322be7d22fSVladimir Kondratiev 833097638a0SVladimir Kondratiev WARN_ON(!mutex_is_locked(&wil->mutex)); 834097638a0SVladimir Kondratiev 8352be7d22fSVladimir Kondratiev if (!vring->va) 8362be7d22fSVladimir Kondratiev return; 8372be7d22fSVladimir Kondratiev 8389cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 8399cf10d62SVladimir Kondratiev 8405933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 841230d8442SVladimir Kondratiev txdata->dot1x_open = false; 8425933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 8435933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 844097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 8459419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 846097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 847097638a0SVladimir Kondratiev 8482be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8493a124ed6SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 8502be7d22fSVladimir Kondratiev } 8512be7d22fSVladimir Kondratiev 85241d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 8532be7d22fSVladimir Kondratiev struct sk_buff *skb) 8542be7d22fSVladimir Kondratiev { 8553df2cd36SVladimir Kondratiev int i; 8563df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 8573df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 8582be7d22fSVladimir Kondratiev 8593df2cd36SVladimir Kondratiev if (cid < 0) 8603df2cd36SVladimir Kondratiev return NULL; 8613df2cd36SVladimir Kondratiev 8623df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 8633df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 864230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 865230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 866230d8442SVladimir Kondratiev continue; 8673df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 8683df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 8698fe59627SVladimir Kondratiev 8703df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 8713df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 8723df2cd36SVladimir Kondratiev if (v->va) { 8732be7d22fSVladimir Kondratiev return v; 8743df2cd36SVladimir Kondratiev } else { 8753df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 8763df2cd36SVladimir Kondratiev return NULL; 8773df2cd36SVladimir Kondratiev } 8783df2cd36SVladimir Kondratiev } 8793df2cd36SVladimir Kondratiev } 8802be7d22fSVladimir Kondratiev 8812be7d22fSVladimir Kondratiev return NULL; 8822be7d22fSVladimir Kondratiev } 8832be7d22fSVladimir Kondratiev 884fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 885fb3cac57SVladimir Kondratiev struct sk_buff *skb); 88654ed90a8SVladimir Kondratiev 88754ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 88854ed90a8SVladimir Kondratiev struct sk_buff *skb) 88954ed90a8SVladimir Kondratiev { 89054ed90a8SVladimir Kondratiev struct vring *v; 89154ed90a8SVladimir Kondratiev int i; 89254ed90a8SVladimir Kondratiev u8 cid; 89354ed90a8SVladimir Kondratiev 89454ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 89554ed90a8SVladimir Kondratiev * for the AP we connected to. 896230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 89754ed90a8SVladimir Kondratiev */ 89854ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 89954ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 90054ed90a8SVladimir Kondratiev if (!v->va) 90154ed90a8SVladimir Kondratiev continue; 90254ed90a8SVladimir Kondratiev 90354ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 90441d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 90541d6b093SVladimir Kondratiev continue; 90641d6b093SVladimir Kondratiev 907230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 90854ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 909230d8442SVladimir Kondratiev continue; 91054ed90a8SVladimir Kondratiev 91154ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 91254ed90a8SVladimir Kondratiev 91354ed90a8SVladimir Kondratiev return v; 91454ed90a8SVladimir Kondratiev } 91554ed90a8SVladimir Kondratiev 91654ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 91754ed90a8SVladimir Kondratiev 91854ed90a8SVladimir Kondratiev return NULL; 91954ed90a8SVladimir Kondratiev } 92054ed90a8SVladimir Kondratiev 92170812421SVladimir Kondratiev /* Use one of 2 strategies: 92270812421SVladimir Kondratiev * 92370812421SVladimir Kondratiev * 1. New (real broadcast): 92470812421SVladimir Kondratiev * use dedicated broadcast vring 92570812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 92670812421SVladimir Kondratiev * Find 1-st vring and return it; 92770812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 92870812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 92970812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 93070812421SVladimir Kondratiev * - for PBSS 93170812421SVladimir Kondratiev */ 93270812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 933fb3cac57SVladimir Kondratiev struct sk_buff *skb) 934fb3cac57SVladimir Kondratiev { 93541d6b093SVladimir Kondratiev struct vring *v; 93641d6b093SVladimir Kondratiev int i = wil->bcast_vring; 937fb3cac57SVladimir Kondratiev 93841d6b093SVladimir Kondratiev if (i < 0) 93941d6b093SVladimir Kondratiev return NULL; 940fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 941e58c9f70SVladimir Kondratiev if (!v->va) 942fb3cac57SVladimir Kondratiev return NULL; 943230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 944230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 945230d8442SVladimir Kondratiev return NULL; 946fb3cac57SVladimir Kondratiev 947fb3cac57SVladimir Kondratiev return v; 948fb3cac57SVladimir Kondratiev } 949fb3cac57SVladimir Kondratiev 95070812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 95170812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 95270812421SVladimir Kondratiev { 95370812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 95470812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 95570812421SVladimir Kondratiev 95670812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 95770812421SVladimir Kondratiev } 95870812421SVladimir Kondratiev 95970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 96070812421SVladimir Kondratiev struct sk_buff *skb) 96170812421SVladimir Kondratiev { 96270812421SVladimir Kondratiev struct vring *v, *v2; 96370812421SVladimir Kondratiev struct sk_buff *skb2; 96470812421SVladimir Kondratiev int i; 96570812421SVladimir Kondratiev u8 cid; 96670812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 96770812421SVladimir Kondratiev char *src = eth->h_source; 96870812421SVladimir Kondratiev 96970812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 97070812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 97170812421SVladimir Kondratiev v = &wil->vring_tx[i]; 97270812421SVladimir Kondratiev if (!v->va) 97370812421SVladimir Kondratiev continue; 97470812421SVladimir Kondratiev 97570812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 97670812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 97770812421SVladimir Kondratiev continue; 978230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 979230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 98070812421SVladimir Kondratiev continue; 98170812421SVladimir Kondratiev 98270812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 98370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 98470812421SVladimir Kondratiev continue; 98570812421SVladimir Kondratiev 98670812421SVladimir Kondratiev goto found; 98770812421SVladimir Kondratiev } 98870812421SVladimir Kondratiev 98970812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 99070812421SVladimir Kondratiev 99170812421SVladimir Kondratiev return NULL; 99270812421SVladimir Kondratiev 99370812421SVladimir Kondratiev found: 99470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 99570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 99670812421SVladimir Kondratiev 99770812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 99870812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 99970812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 100070812421SVladimir Kondratiev if (!v2->va) 100170812421SVladimir Kondratiev continue; 100270812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 100370812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 100470812421SVladimir Kondratiev continue; 1005230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1006230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 100770812421SVladimir Kondratiev continue; 100870812421SVladimir Kondratiev 100970812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 101070812421SVladimir Kondratiev continue; 101170812421SVladimir Kondratiev 101270812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 101370812421SVladimir Kondratiev if (skb2) { 101470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 101570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 101670812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 101770812421SVladimir Kondratiev } else { 101870812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 101970812421SVladimir Kondratiev } 102070812421SVladimir Kondratiev } 102170812421SVladimir Kondratiev 102270812421SVladimir Kondratiev return v; 102370812421SVladimir Kondratiev } 102470812421SVladimir Kondratiev 102570812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 102670812421SVladimir Kondratiev struct sk_buff *skb) 102770812421SVladimir Kondratiev { 102870812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 102970812421SVladimir Kondratiev 103070812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 103170812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 103270812421SVladimir Kondratiev 103370812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 103470812421SVladimir Kondratiev } 103570812421SVladimir Kondratiev 103699b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 103799b55bd2SKirshenbaum Erez int vring_index) 10382be7d22fSVladimir Kondratiev { 103968ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 10402be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 10412be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 10422be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 10432be7d22fSVladimir Kondratiev d->dma.error = 0; 10442be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 10457e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 104699b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 10472be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 10482be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 10492be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 10502be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 10512be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 10522be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 10532be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 10542be7d22fSVladimir Kondratiev 10552be7d22fSVladimir Kondratiev return 0; 10562be7d22fSVladimir Kondratiev } 10572be7d22fSVladimir Kondratiev 1058c236658fSVladimir Kondratiev static inline 1059c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1060c236658fSVladimir Kondratiev { 10613d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1062c236658fSVladimir Kondratiev } 1063c236658fSVladimir Kondratiev 10643d4bde15SVladimir Kondratiev /** 10653d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 10663d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 10673d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 10683d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 10693d4bde15SVladimir Kondratiev */ 10703d4bde15SVladimir Kondratiev 10713d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 10723d4bde15SVladimir Kondratiev struct sk_buff *skb, 10733d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 10743d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1075504937d4SKirshenbaum Erez { 10763d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 10773d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 10783d4bde15SVladimir Kondratiev 10793d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 10803d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 10813d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 10823d4bde15SVladimir Kondratiev 10833d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 10843d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 10853d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 10863d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 10873d4bde15SVladimir Kondratiev 10883d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 10893d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 10903d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 10913d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 10923d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 10933d4bde15SVladimir Kondratiev } 10943d4bde15SVladimir Kondratiev 10953d4bde15SVladimir Kondratiev /** 10963d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 10973d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 10983d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 10993d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 11003d4bde15SVladimir Kondratiev * 11013d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 11023d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 11033d4bde15SVladimir Kondratiev */ 11043d4bde15SVladimir Kondratiev 11053d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 11063d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1107504937d4SKirshenbaum Erez int protocol; 1108504937d4SKirshenbaum Erez 1109504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1110504937d4SKirshenbaum Erez return 0; 1111504937d4SKirshenbaum Erez 1112df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1113df2d08eeSVladimir Kondratiev 1114504937d4SKirshenbaum Erez switch (skb->protocol) { 1115504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1116504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1117df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1118504937d4SKirshenbaum Erez break; 1119504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1120504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1121504937d4SKirshenbaum Erez break; 1122504937d4SKirshenbaum Erez default: 1123504937d4SKirshenbaum Erez return -EINVAL; 1124504937d4SKirshenbaum Erez } 1125504937d4SKirshenbaum Erez 1126504937d4SKirshenbaum Erez switch (protocol) { 1127504937d4SKirshenbaum Erez case IPPROTO_TCP: 1128504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1129504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1130504937d4SKirshenbaum Erez d->dma.d0 |= 1131504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1132504937d4SKirshenbaum Erez break; 1133504937d4SKirshenbaum Erez case IPPROTO_UDP: 1134504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1135504937d4SKirshenbaum Erez d->dma.d0 |= 1136504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1137504937d4SKirshenbaum Erez break; 1138504937d4SKirshenbaum Erez default: 1139504937d4SKirshenbaum Erez return -EINVAL; 1140504937d4SKirshenbaum Erez } 1141504937d4SKirshenbaum Erez 1142504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1143504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1144504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1145504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1146504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1147504937d4SKirshenbaum Erez 1148504937d4SKirshenbaum Erez return 0; 1149504937d4SKirshenbaum Erez } 1150504937d4SKirshenbaum Erez 11513d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 11523d4bde15SVladimir Kondratiev { 11533d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 11543d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 11553d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 11563d4bde15SVladimir Kondratiev } 11573d4bde15SVladimir Kondratiev 11583d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 11593d4bde15SVladimir Kondratiev { 11603d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 11613d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 11623d4bde15SVladimir Kondratiev } 11633d4bde15SVladimir Kondratiev 11643d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 11653d4bde15SVladimir Kondratiev struct sk_buff *skb) 11663d4bde15SVladimir Kondratiev { 11673d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 11683d4bde15SVladimir Kondratiev 11693d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 11703d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 11713d4bde15SVladimir Kondratiev *_first_desc = NULL; 11723d4bde15SVladimir Kondratiev 11733d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 11743d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 11753d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 11763d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 11773d4bde15SVladimir Kondratiev 11783d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 11793d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 11803d4bde15SVladimir Kondratiev 11813d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 11823d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 11833d4bde15SVladimir Kondratiev 11843d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 11853d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 11863d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 11873d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 11883d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 11893d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 11903d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 11913d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 11923d4bde15SVladimir Kondratiev uint i = swhead; 11933d4bde15SVladimir Kondratiev dma_addr_t pa; 11943d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 11953d4bde15SVladimir Kondratiev int rem_data = mss; 11963d4bde15SVladimir Kondratiev int lenmss; 11973d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 11983d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 11993d4bde15SVladimir Kondratiev bool is_ipv4; 12003d4bde15SVladimir Kondratiev int tcp_hdr_len; 12013d4bde15SVladimir Kondratiev int skb_net_hdr_len; 12023d4bde15SVladimir Kondratiev int gso_type; 12033d4bde15SVladimir Kondratiev 12043d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 12053d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 12063d4bde15SVladimir Kondratiev 12073d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 12083d4bde15SVladimir Kondratiev return -EINVAL; 12093d4bde15SVladimir Kondratiev 12103d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 12113d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 12123d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 12133d4bde15SVladimir Kondratiev * this is the initial check only. 12143d4bde15SVladimir Kondratiev */ 12153d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 12163d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 12173d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 12183d4bde15SVladimir Kondratiev vring_index, min_desc_required); 12193d4bde15SVladimir Kondratiev return -ENOMEM; 12203d4bde15SVladimir Kondratiev } 12213d4bde15SVladimir Kondratiev 12223d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 12233d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 12243d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 12253d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 12263d4bde15SVladimir Kondratiev 12273d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 12283d4bde15SVladimir Kondratiev switch (gso_type) { 12293d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 12303d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 12313d4bde15SVladimir Kondratiev * as required by the offloading doc 12323d4bde15SVladimir Kondratiev */ 12333d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 12343d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 12353d4bde15SVladimir Kondratiev is_ipv4 = true; 12363d4bde15SVladimir Kondratiev break; 12373d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 12383d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 12393d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 12403d4bde15SVladimir Kondratiev is_ipv4 = false; 12413d4bde15SVladimir Kondratiev break; 12423d4bde15SVladimir Kondratiev default: 12433d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 12443d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 12453d4bde15SVladimir Kondratiev */ 12463d4bde15SVladimir Kondratiev return -EINVAL; 12473d4bde15SVladimir Kondratiev } 12483d4bde15SVladimir Kondratiev 12493d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 12503d4bde15SVladimir Kondratiev return -EINVAL; 12513d4bde15SVladimir Kondratiev 12523d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 12533d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 12543d4bde15SVladimir Kondratiev */ 12553d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 12563d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 12573d4bde15SVladimir Kondratiev 12583d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 12593d4bde15SVladimir Kondratiev 12603d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 12613d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 12623d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 12633d4bde15SVladimir Kondratiev goto err_exit; 12643d4bde15SVladimir Kondratiev } 12653d4bde15SVladimir Kondratiev 12663d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 12673d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 12683d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 12693d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 12703d4bde15SVladimir Kondratiev 12713d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 12723d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 12733d4bde15SVladimir Kondratiev 12743d4bde15SVladimir Kondratiev descs_used++; 12753d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 12763d4bde15SVladimir Kondratiev 12773d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 12783d4bde15SVladimir Kondratiev if (headlen) { 12793d4bde15SVladimir Kondratiev len = headlen; 12803d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 12813d4bde15SVladimir Kondratiev len); 12823d4bde15SVladimir Kondratiev } else { 12833d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 12843d4bde15SVladimir Kondratiev len = frag->size; 12853d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 12863d4bde15SVladimir Kondratiev } 12873d4bde15SVladimir Kondratiev 12883d4bde15SVladimir Kondratiev while (len) { 12893d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 12903d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 12913d4bde15SVladimir Kondratiev len, rem_data, descs_used); 12923d4bde15SVladimir Kondratiev 12933d4bde15SVladimir Kondratiev if (descs_used == avail) { 12943d4bde15SVladimir Kondratiev wil_err(wil, "TSO: ring overflow\n"); 12953d4bde15SVladimir Kondratiev goto dma_error; 12963d4bde15SVladimir Kondratiev } 12973d4bde15SVladimir Kondratiev 12983d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 12993d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 13003d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 13013d4bde15SVladimir Kondratiev 13023d4bde15SVladimir Kondratiev if (!headlen) { 13033d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 13043d4bde15SVladimir Kondratiev frag->size - len, lenmss, 13053d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13063d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 13073d4bde15SVladimir Kondratiev } else { 13083d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 13093d4bde15SVladimir Kondratiev skb->data + 13103d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 13113d4bde15SVladimir Kondratiev lenmss, 13123d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13133d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 13143d4bde15SVladimir Kondratiev headlen -= lenmss; 13153d4bde15SVladimir Kondratiev } 13163d4bde15SVladimir Kondratiev 13173d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 13183d4bde15SVladimir Kondratiev goto dma_error; 13193d4bde15SVladimir Kondratiev 13203d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 13213d4bde15SVladimir Kondratiev 13223d4bde15SVladimir Kondratiev if (!_first_desc) { 13233d4bde15SVladimir Kondratiev _first_desc = _desc; 13243d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 13253d4bde15SVladimir Kondratiev d = first_desc; 13263d4bde15SVladimir Kondratiev } else { 13273d4bde15SVladimir Kondratiev d = &desc_mem; 13283d4bde15SVladimir Kondratiev } 13293d4bde15SVladimir Kondratiev 13303d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 13313d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 13323d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 13333d4bde15SVladimir Kondratiev skb_net_hdr_len); 13343d4bde15SVladimir Kondratiev 13353d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 13363d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 13373d4bde15SVladimir Kondratiev 13383d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 13393d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 13403d4bde15SVladimir Kondratiev len -= lenmss; 13413d4bde15SVladimir Kondratiev rem_data -= lenmss; 13423d4bde15SVladimir Kondratiev 13433d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 13443d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 13453d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 13463d4bde15SVladimir Kondratiev 13473d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 13483d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 13493d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 13503d4bde15SVladimir Kondratiev /* first segment include hdr desc for 13513d4bde15SVladimir Kondratiev * release 13523d4bde15SVladimir Kondratiev */ 13533d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 13543d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 13553d4bde15SVladimir Kondratiev sg_desc_cnt + 13563d4bde15SVladimir Kondratiev 1); 13573d4bde15SVladimir Kondratiev hdr_compensation_need = false; 13583d4bde15SVladimir Kondratiev } else { 13593d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 13603d4bde15SVladimir Kondratiev sg_desc_cnt); 13613d4bde15SVladimir Kondratiev } 13623d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 13633d4bde15SVladimir Kondratiev 13643d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 13653d4bde15SVladimir Kondratiev 13663d4bde15SVladimir Kondratiev /* first descriptor may also be the last 13673d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 13683d4bde15SVladimir Kondratiev * it twice 13693d4bde15SVladimir Kondratiev */ 13703d4bde15SVladimir Kondratiev if (first_desc != d) 13713d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 13723d4bde15SVladimir Kondratiev 13733d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 13743d4bde15SVladimir Kondratiev * of this TS processing 13753d4bde15SVladimir Kondratiev */ 13763d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 13773d4bde15SVladimir Kondratiev *_desc = *d; 13783d4bde15SVladimir Kondratiev 13793d4bde15SVladimir Kondratiev rem_data = mss; 13803d4bde15SVladimir Kondratiev _first_desc = NULL; 13813d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 13823d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 13833d4bde15SVladimir Kondratiev *_desc = *d; 13843d4bde15SVladimir Kondratiev } 13853d4bde15SVladimir Kondratiev } 13863d4bde15SVladimir Kondratiev 13873d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 13883d4bde15SVladimir Kondratiev * in this case d pointer is invalid 13893d4bde15SVladimir Kondratiev */ 13903d4bde15SVladimir Kondratiev if (_first_desc == _desc) 13913d4bde15SVladimir Kondratiev d = first_desc; 13923d4bde15SVladimir Kondratiev 13933d4bde15SVladimir Kondratiev /* Last data descriptor */ 13943d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 13953d4bde15SVladimir Kondratiev *_desc = *d; 13963d4bde15SVladimir Kondratiev 13973d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 13983d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 13993d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 14003d4bde15SVladimir Kondratiev 14013d4bde15SVladimir Kondratiev /* hold reference to skb 14023d4bde15SVladimir Kondratiev * to prevent skb release before accounting 14033d4bde15SVladimir Kondratiev * in case of immediate "tx done" 14043d4bde15SVladimir Kondratiev */ 14053d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 14063d4bde15SVladimir Kondratiev 14073d4bde15SVladimir Kondratiev /* performance monitoring */ 14083d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 14093d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 14103d4bde15SVladimir Kondratiev used, used + descs_used)) { 14113d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 14123d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 14133d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 14143d4bde15SVladimir Kondratiev } 14153d4bde15SVladimir Kondratiev 14163d4bde15SVladimir Kondratiev /* advance swhead */ 14173d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 14183d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 14193d4bde15SVladimir Kondratiev 14203d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 14213d4bde15SVladimir Kondratiev * committing them to HW 14223d4bde15SVladimir Kondratiev */ 14233d4bde15SVladimir Kondratiev wmb(); 14243d4bde15SVladimir Kondratiev 14253d4bde15SVladimir Kondratiev iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail)); 14263d4bde15SVladimir Kondratiev return 0; 14273d4bde15SVladimir Kondratiev 14283d4bde15SVladimir Kondratiev dma_error: 14293d4bde15SVladimir Kondratiev wil_err(wil, "TSO: DMA map page error\n"); 14303d4bde15SVladimir Kondratiev while (descs_used > 0) { 14313d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 14323d4bde15SVladimir Kondratiev 14333d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14343d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 14353d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14363d4bde15SVladimir Kondratiev *d = *_desc; 14373d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 14383d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 14393d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 14403d4bde15SVladimir Kondratiev if (ctx->skb) 14413d4bde15SVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 14423d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 14433d4bde15SVladimir Kondratiev descs_used--; 14443d4bde15SVladimir Kondratiev } 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev err_exit: 14473d4bde15SVladimir Kondratiev return -EINVAL; 14483d4bde15SVladimir Kondratiev } 14493d4bde15SVladimir Kondratiev 14505933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 14512be7d22fSVladimir Kondratiev struct sk_buff *skb) 14522be7d22fSVladimir Kondratiev { 14532be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 145468ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 145568ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 14562be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 14572be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 14582be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1459504937d4SKirshenbaum Erez uint f = 0; 14602be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 14617c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 14622be7d22fSVladimir Kondratiev uint i = swhead; 14632be7d22fSVladimir Kondratiev dma_addr_t pa; 14640436fd9aSVladimir Shulman int used; 146541d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 146641d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 14672be7d22fSVladimir Kondratiev 14683d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 14693d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 14702be7d22fSVladimir Kondratiev 14715933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 14725933a06dSVladimir Kondratiev return -EINVAL; 14735933a06dSVladimir Kondratiev 147433c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 147570801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 14765b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 14775b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 14782be7d22fSVladimir Kondratiev return -ENOMEM; 14792be7d22fSVladimir Kondratiev } 14808fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 14812be7d22fSVladimir Kondratiev 14828fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 14832be7d22fSVladimir Kondratiev 14845b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 14855b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 14867743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 14872be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 14882be7d22fSVladimir Kondratiev 14892be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 14902be7d22fSVladimir Kondratiev return -EINVAL; 14912232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14922be7d22fSVladimir Kondratiev /* 1-st segment */ 149341d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 149441d6b093SVladimir Kondratiev if (unlikely(mcast)) { 149541d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1496230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 149741d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 149841d6b093SVladimir Kondratiev } 1499504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 15003d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 15015b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1502504937d4SKirshenbaum Erez vring_index); 1503504937d4SKirshenbaum Erez goto dma_error; 1504504937d4SKirshenbaum Erez } 1505504937d4SKirshenbaum Erez 1506c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 15073d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 150868ada71eSVladimir Kondratiev 15092be7d22fSVladimir Kondratiev /* middle segments */ 1510504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 15112be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 15122be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 15132be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 15148fe59627SVladimir Kondratiev 1515e59d16c0SVladimir Kondratiev *_d = *d; 15165b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15175b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15185b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15192be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 15208fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 15212be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 15222be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 15232be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 15242be7d22fSVladimir Kondratiev goto dma_error; 15252232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 152699b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1527c236658fSVladimir Kondratiev /* no need to check return code - 1528c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1529c236658fSVladimir Kondratiev * it will succeed here too 1530c236658fSVladimir Kondratiev */ 15313d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 15322be7d22fSVladimir Kondratiev } 15332be7d22fSVladimir Kondratiev /* for the last seg only */ 15342be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1535668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 15362be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 153768ada71eSVladimir Kondratiev *_d = *d; 15385b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15395b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15405b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15412be7d22fSVladimir Kondratiev 15426cdadd4dSVladimir Kondratiev /* hold reference to skb 15436cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 15446cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 15456cdadd4dSVladimir Kondratiev */ 15466cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15476cdadd4dSVladimir Kondratiev 15480436fd9aSVladimir Shulman /* performance monitoring */ 15490436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 15500436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 15510436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 15527c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15530436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15540436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 15550436fd9aSVladimir Shulman } 15567c0acf86SVladimir Kondratiev 15572be7d22fSVladimir Kondratiev /* advance swhead */ 15582be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 15595b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 15605b29c573SVladimir Kondratiev vring->swhead); 156198658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 15623d4bde15SVladimir Kondratiev 15633d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 15643d4bde15SVladimir Kondratiev * committing them to HW 15653d4bde15SVladimir Kondratiev */ 15663d4bde15SVladimir Kondratiev wmb(); 15673d4bde15SVladimir Kondratiev 15682be7d22fSVladimir Kondratiev iowrite32(vring->swhead, wil->csr + HOSTADDR(vring->hwtail)); 15692be7d22fSVladimir Kondratiev 15702be7d22fSVladimir Kondratiev return 0; 15712be7d22fSVladimir Kondratiev dma_error: 15722be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1573c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1574c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1575c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 15767e594444SVladimir Kondratiev 15772be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1578c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 15798fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 158068ada71eSVladimir Kondratiev *d = *_d; 158168ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 15822232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1583f88f113aSVladimir Kondratiev 1584f88f113aSVladimir Kondratiev if (ctx->skb) 1585f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 1586f88f113aSVladimir Kondratiev 1587f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 15882be7d22fSVladimir Kondratiev } 15892be7d22fSVladimir Kondratiev 15902be7d22fSVladimir Kondratiev return -EINVAL; 15912be7d22fSVladimir Kondratiev } 15922be7d22fSVladimir Kondratiev 15935933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 15945933a06dSVladimir Kondratiev struct sk_buff *skb) 15955933a06dSVladimir Kondratiev { 15965933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 15975933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 15985933a06dSVladimir Kondratiev int rc; 15995933a06dSVladimir Kondratiev 16005933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 16013d4bde15SVladimir Kondratiev 16023d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 16033d4bde15SVladimir Kondratiev (wil, vring, skb); 16043d4bde15SVladimir Kondratiev 16055933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 16063d4bde15SVladimir Kondratiev 16075933a06dSVladimir Kondratiev return rc; 16085933a06dSVladimir Kondratiev } 16095933a06dSVladimir Kondratiev 16102be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 16112be7d22fSVladimir Kondratiev { 16122be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 16133df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 161441d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 16152be7d22fSVladimir Kondratiev struct vring *vring; 1616aa27deaaSVladimir Kondratiev static bool pr_once_fw; 16172be7d22fSVladimir Kondratiev int rc; 16182be7d22fSVladimir Kondratiev 16197743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 162033c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1621aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 16222be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1623aa27deaaSVladimir Kondratiev pr_once_fw = true; 1624aa27deaaSVladimir Kondratiev } 16252be7d22fSVladimir Kondratiev goto drop; 16262be7d22fSVladimir Kondratiev } 162733c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 16282be7d22fSVladimir Kondratiev wil_err(wil, "FW not connected\n"); 16292be7d22fSVladimir Kondratiev goto drop; 16302be7d22fSVladimir Kondratiev } 163133c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 16322be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 16332be7d22fSVladimir Kondratiev goto drop; 16342be7d22fSVladimir Kondratiev } 1635aa27deaaSVladimir Kondratiev pr_once_fw = false; 1636d58db4e4SVladimir Kondratiev 16372be7d22fSVladimir Kondratiev /* find vring */ 163854ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 163954ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 164054ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 164154ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 164241d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 164341d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 164454ed90a8SVladimir Kondratiev } 164533c477fdSVladimir Kondratiev if (unlikely(!vring)) { 16465aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 16472be7d22fSVladimir Kondratiev goto drop; 16482be7d22fSVladimir Kondratiev } 16492be7d22fSVladimir Kondratiev /* set up vring entry */ 16502be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1651d58db4e4SVladimir Kondratiev 16522232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 165333c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 16542232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 165555f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 165655f8f680SVladimir Kondratiev } 16572232abd5SVladimir Kondratiev 16582be7d22fSVladimir Kondratiev switch (rc) { 16592be7d22fSVladimir Kondratiev case 0: 1660795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 16612be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 16622be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 16632be7d22fSVladimir Kondratiev case -ENOMEM: 16642be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 16652be7d22fSVladimir Kondratiev default: 1666afda8bb5SVladimir Kondratiev break; /* goto drop; */ 16672be7d22fSVladimir Kondratiev } 16682be7d22fSVladimir Kondratiev drop: 16692be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 16702be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 16712be7d22fSVladimir Kondratiev 16722be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 16732be7d22fSVladimir Kondratiev } 16742be7d22fSVladimir Kondratiev 1675713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1676713c8a29SVladimir Kondratiev { 1677713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1678713c8a29SVladimir Kondratiev 1679713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1680713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1681713c8a29SVladimir Kondratiev } 1682713c8a29SVladimir Kondratiev 1683713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1684713c8a29SVladimir Kondratiev { 1685713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1686713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1687713c8a29SVladimir Kondratiev else 1688713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1689713c8a29SVladimir Kondratiev } 1690713c8a29SVladimir Kondratiev 16912be7d22fSVladimir Kondratiev /** 16922be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 16932be7d22fSVladimir Kondratiev * 1694e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1695e0287c4aSVladimir Kondratiev * 16962be7d22fSVladimir Kondratiev * Safe to call from IRQ 16972be7d22fSVladimir Kondratiev */ 1698e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 16992be7d22fSVladimir Kondratiev { 1700795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 17012be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17022be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1703097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1704e0287c4aSVladimir Kondratiev int done = 0; 1705c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 170641d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1707c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17080436fd9aSVladimir Shulman int used_before_complete; 17090436fd9aSVladimir Shulman int used_new; 17102be7d22fSVladimir Kondratiev 171133c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 17122be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1713e0287c4aSVladimir Kondratiev return 0; 17142be7d22fSVladimir Kondratiev } 17152be7d22fSVladimir Kondratiev 171633c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1717097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1718097638a0SVladimir Kondratiev return 0; 1719097638a0SVladimir Kondratiev } 1720097638a0SVladimir Kondratiev 17217743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 17222be7d22fSVladimir Kondratiev 17230436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 17240436fd9aSVladimir Shulman 172541d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 172641d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 172741d6b093SVladimir Kondratiev 17282be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1729c236658fSVladimir Kondratiev int new_swtail; 1730c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1731c236658fSVladimir Kondratiev /** 1732c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 17333d4bde15SVladimir Kondratiev * last fragment. look for it. 17343d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1735c236658fSVladimir Kondratiev */ 1736c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1737c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1738c236658fSVladimir Kondratiev 1739c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 174033c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1741c236658fSVladimir Kondratiev break; 1742c236658fSVladimir Kondratiev 1743c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1744c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 17454de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 17467e594444SVladimir Kondratiev u16 dmalen; 174776dfa4b7SVladimir Kondratiev struct sk_buff *skb; 174876dfa4b7SVladimir Kondratiev 174976dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 175076dfa4b7SVladimir Kondratiev skb = ctx->skb; 1751c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 17524de41befSVladimir Kondratiev 175368ada71eSVladimir Kondratiev *d = *_d; 17544de41befSVladimir Kondratiev 17557e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 175698658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 175798658095SVladimir Kondratiev d->dma.error); 17587743882dSVladimir Kondratiev wil_dbg_txrx(wil, 17595b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 17605b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 17615b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 17625b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 17632be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 17642be7d22fSVladimir Kondratiev 17652232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1766f88f113aSVladimir Kondratiev 17672be7d22fSVladimir Kondratiev if (skb) { 176833c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1769795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1770795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 177141d6b093SVladimir Kondratiev if (stats) { 177241d6b093SVladimir Kondratiev stats->tx_packets++; 1773c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 177441d6b093SVladimir Kondratiev } 1775795ce734SVladimir Kondratiev } else { 1776795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 177741d6b093SVladimir Kondratiev if (stats) 1778c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1779795ce734SVladimir Kondratiev } 1780713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 17812be7d22fSVladimir Kondratiev } 1782f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1783c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 178403269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 178503269c65SVladimir Kondratiev * so hardware will not try to process this desc., 178603269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 178703269c65SVladimir Kondratiev */ 17882be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1789e0287c4aSVladimir Kondratiev done++; 17902be7d22fSVladimir Kondratiev } 1791c236658fSVladimir Kondratiev } 179267c3e1b4SVladimir Kondratiev 17930436fd9aSVladimir Shulman /* performance monitoring */ 17940436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 17950436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 17960436fd9aSVladimir Shulman used_new, used_before_complete)) { 17970436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 17980436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 17997c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 18007c0acf86SVladimir Kondratiev } 180167c3e1b4SVladimir Kondratiev 180255f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 180355f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 18042be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 180555f8f680SVladimir Kondratiev } 1806e0287c4aSVladimir Kondratiev 1807e0287c4aSVladimir Kondratiev return done; 18082be7d22fSVladimir Kondratiev } 1809