12be7d22fSVladimir Kondratiev /* 2b729aaf0SMaya Erez * Copyright (c) 2012-2016 Qualcomm Atheros, Inc. 32be7d22fSVladimir Kondratiev * 42be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 52be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 62be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 72be7d22fSVladimir Kondratiev * 82be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 92be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 102be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 112be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 122be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 132be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 142be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 152be7d22fSVladimir Kondratiev */ 162be7d22fSVladimir Kondratiev 172be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 182be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 192be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 202be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 21504937d4SKirshenbaum Erez #include <linux/ip.h> 22504937d4SKirshenbaum Erez #include <linux/ipv6.h> 23504937d4SKirshenbaum Erez #include <net/ipv6.h> 240786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 252be7d22fSVladimir Kondratiev 262be7d22fSVladimir Kondratiev #include "wil6210.h" 272be7d22fSVladimir Kondratiev #include "wmi.h" 282be7d22fSVladimir Kondratiev #include "txrx.h" 2998658095SVladimir Kondratiev #include "trace.h" 302be7d22fSVladimir Kondratiev 312be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 322be7d22fSVladimir Kondratiev module_param(rtap_include_phy_info, bool, S_IRUGO); 332be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 342be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 352be7d22fSVladimir Kondratiev 36c406ea7cSVladimir Kondratiev bool rx_align_2; 37c406ea7cSVladimir Kondratiev module_param(rx_align_2, bool, S_IRUGO); 38c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 39c406ea7cSVladimir Kondratiev 40c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 41c406ea7cSVladimir Kondratiev { 42c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 43c406ea7cSVladimir Kondratiev } 44c406ea7cSVladimir Kondratiev 452be7d22fSVladimir Kondratiev static inline int wil_vring_is_empty(struct vring *vring) 462be7d22fSVladimir Kondratiev { 472be7d22fSVladimir Kondratiev return vring->swhead == vring->swtail; 482be7d22fSVladimir Kondratiev } 492be7d22fSVladimir Kondratiev 502be7d22fSVladimir Kondratiev static inline u32 wil_vring_next_tail(struct vring *vring) 512be7d22fSVladimir Kondratiev { 522be7d22fSVladimir Kondratiev return (vring->swtail + 1) % vring->size; 532be7d22fSVladimir Kondratiev } 542be7d22fSVladimir Kondratiev 552be7d22fSVladimir Kondratiev static inline void wil_vring_advance_head(struct vring *vring, int n) 562be7d22fSVladimir Kondratiev { 572be7d22fSVladimir Kondratiev vring->swhead = (vring->swhead + n) % vring->size; 582be7d22fSVladimir Kondratiev } 592be7d22fSVladimir Kondratiev 602be7d22fSVladimir Kondratiev static inline int wil_vring_is_full(struct vring *vring) 612be7d22fSVladimir Kondratiev { 622be7d22fSVladimir Kondratiev return wil_vring_next_tail(vring) == vring->swhead; 632be7d22fSVladimir Kondratiev } 648fe59627SVladimir Kondratiev 650436fd9aSVladimir Shulman /* Used space in Tx Vring */ 660436fd9aSVladimir Shulman static inline int wil_vring_used_tx(struct vring *vring) 672be7d22fSVladimir Kondratiev { 682be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 692be7d22fSVladimir Kondratiev u32 swtail = vring->swtail; 700436fd9aSVladimir Shulman return (vring->size + swhead - swtail) % vring->size; 712be7d22fSVladimir Kondratiev } 722be7d22fSVladimir Kondratiev 730436fd9aSVladimir Shulman /* Available space in Tx Vring */ 740436fd9aSVladimir Shulman static inline int wil_vring_avail_tx(struct vring *vring) 750436fd9aSVladimir Shulman { 760436fd9aSVladimir Shulman return vring->size - wil_vring_used_tx(vring) - 1; 770436fd9aSVladimir Shulman } 780436fd9aSVladimir Shulman 790436fd9aSVladimir Shulman /* wil_vring_wmark_low - low watermark for available descriptor space */ 805bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_low(struct vring *vring) 815bb6423eSVladimir Kondratiev { 825bb6423eSVladimir Kondratiev return vring->size/8; 835bb6423eSVladimir Kondratiev } 845bb6423eSVladimir Kondratiev 850436fd9aSVladimir Shulman /* wil_vring_wmark_high - high watermark for available descriptor space */ 865bb6423eSVladimir Kondratiev static inline int wil_vring_wmark_high(struct vring *vring) 875bb6423eSVladimir Kondratiev { 885bb6423eSVladimir Kondratiev return vring->size/4; 895bb6423eSVladimir Kondratiev } 905bb6423eSVladimir Kondratiev 910436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 920436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 930436fd9aSVladimir Shulman { 940436fd9aSVladimir Shulman return val >= min && val < max; 950436fd9aSVladimir Shulman } 960436fd9aSVladimir Shulman 972be7d22fSVladimir Kondratiev static int wil_vring_alloc(struct wil6210_priv *wil, struct vring *vring) 982be7d22fSVladimir Kondratiev { 992be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1002be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1012be7d22fSVladimir Kondratiev uint i; 1022be7d22fSVladimir Kondratiev 1039cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 1049cf10d62SVladimir Kondratiev 1052be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1062be7d22fSVladimir Kondratiev 1072be7d22fSVladimir Kondratiev vring->swhead = 0; 1082be7d22fSVladimir Kondratiev vring->swtail = 0; 109f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1102be7d22fSVladimir Kondratiev if (!vring->ctx) { 1112be7d22fSVladimir Kondratiev vring->va = NULL; 1122be7d22fSVladimir Kondratiev return -ENOMEM; 1132be7d22fSVladimir Kondratiev } 1140436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 1152be7d22fSVladimir Kondratiev * This is granted by the dma_alloc_coherent 1162be7d22fSVladimir Kondratiev */ 1172be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1182be7d22fSVladimir Kondratiev if (!vring->va) { 1192be7d22fSVladimir Kondratiev kfree(vring->ctx); 1202be7d22fSVladimir Kondratiev vring->ctx = NULL; 1212be7d22fSVladimir Kondratiev return -ENOMEM; 1222be7d22fSVladimir Kondratiev } 1232be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1242be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1252be7d22fSVladimir Kondratiev * we can use any 1262be7d22fSVladimir Kondratiev */ 1272be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 1288fe59627SVladimir Kondratiev volatile struct vring_tx_desc *_d = &vring->va[i].tx; 1298fe59627SVladimir Kondratiev 13068ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1312be7d22fSVladimir Kondratiev } 1322be7d22fSVladimir Kondratiev 13339c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 13439c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1352be7d22fSVladimir Kondratiev 1362be7d22fSVladimir Kondratiev return 0; 1372be7d22fSVladimir Kondratiev } 1382be7d22fSVladimir Kondratiev 1392232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1402232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1412232abd5SVladimir Kondratiev { 1422232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1432232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1448fe59627SVladimir Kondratiev 1452232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1462232abd5SVladimir Kondratiev case wil_mapped_as_single: 1472232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1482232abd5SVladimir Kondratiev break; 1492232abd5SVladimir Kondratiev case wil_mapped_as_page: 1502232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1512232abd5SVladimir Kondratiev break; 1522232abd5SVladimir Kondratiev default: 1532232abd5SVladimir Kondratiev break; 1542232abd5SVladimir Kondratiev } 1552232abd5SVladimir Kondratiev } 1562232abd5SVladimir Kondratiev 1572be7d22fSVladimir Kondratiev static void wil_vring_free(struct wil6210_priv *wil, struct vring *vring, 1582be7d22fSVladimir Kondratiev int tx) 1592be7d22fSVladimir Kondratiev { 1602be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1612be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1622be7d22fSVladimir Kondratiev 1639b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 164ef77285fSVladimir Kondratiev if (tx) { 165ef77285fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 166ef77285fSVladimir Kondratiev 167ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 168ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 169ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 170ef77285fSVladimir Kondratiev } else { 171ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 172ef77285fSVladimir Kondratiev vring->size, vring->va, 173ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 174ef77285fSVladimir Kondratiev } 175ef77285fSVladimir Kondratiev 1762be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 17768ada71eSVladimir Kondratiev dma_addr_t pa; 1787e594444SVladimir Kondratiev u16 dmalen; 179f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 18068ada71eSVladimir Kondratiev 1812be7d22fSVladimir Kondratiev if (tx) { 18268ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 18368ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 1842be7d22fSVladimir Kondratiev &vring->va[vring->swtail].tx; 18568ada71eSVladimir Kondratiev 186f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 18768ada71eSVladimir Kondratiev *d = *_d; 1882232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 189f88f113aSVladimir Kondratiev if (ctx->skb) 190f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 1912be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1922be7d22fSVladimir Kondratiev } else { /* rx */ 19368ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 19468ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 1954d1ac072SVladimir Kondratiev &vring->va[vring->swhead].rx; 19668ada71eSVladimir Kondratiev 197f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 19868ada71eSVladimir Kondratiev *d = *_d; 19968ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2007e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2017e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 202f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 2032be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, 1); 2042be7d22fSVladimir Kondratiev } 2052be7d22fSVladimir Kondratiev } 2062be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2072be7d22fSVladimir Kondratiev kfree(vring->ctx); 2082be7d22fSVladimir Kondratiev vring->pa = 0; 2092be7d22fSVladimir Kondratiev vring->va = NULL; 2102be7d22fSVladimir Kondratiev vring->ctx = NULL; 2112be7d22fSVladimir Kondratiev } 2122be7d22fSVladimir Kondratiev 2132be7d22fSVladimir Kondratiev /** 2142be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2152be7d22fSVladimir Kondratiev * 2162be7d22fSVladimir Kondratiev * Safe to call from IRQ 2172be7d22fSVladimir Kondratiev */ 2182be7d22fSVladimir Kondratiev static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct vring *vring, 2192be7d22fSVladimir Kondratiev u32 i, int headroom) 2202be7d22fSVladimir Kondratiev { 2212be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 222c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + wil_rx_snaplen(); 22368ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 2248fe59627SVladimir Kondratiev volatile struct vring_rx_desc *_d = &vring->va[i].rx; 2252be7d22fSVladimir Kondratiev dma_addr_t pa; 2262be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2278fe59627SVladimir Kondratiev 2282be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2292be7d22fSVladimir Kondratiev return -ENOMEM; 2302be7d22fSVladimir Kondratiev 2312be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2322be7d22fSVladimir Kondratiev skb_put(skb, sz); 2332be7d22fSVladimir Kondratiev 2342be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2352be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2362be7d22fSVladimir Kondratiev kfree_skb(skb); 2372be7d22fSVladimir Kondratiev return -ENOMEM; 2382be7d22fSVladimir Kondratiev } 2392be7d22fSVladimir Kondratiev 24048c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 24168ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2422be7d22fSVladimir Kondratiev /* ip_length don't care */ 2432be7d22fSVladimir Kondratiev /* b11 don't care */ 2442be7d22fSVladimir Kondratiev /* error don't care */ 2452be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2467e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 24768ada71eSVladimir Kondratiev *_d = *d; 248f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2492be7d22fSVladimir Kondratiev 2502be7d22fSVladimir Kondratiev return 0; 2512be7d22fSVladimir Kondratiev } 2522be7d22fSVladimir Kondratiev 2532be7d22fSVladimir Kondratiev /** 2542be7d22fSVladimir Kondratiev * Adds radiotap header 2552be7d22fSVladimir Kondratiev * 2562be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 2572be7d22fSVladimir Kondratiev * 2582be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 2592be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 2602be7d22fSVladimir Kondratiev * - Phy info 2612be7d22fSVladimir Kondratiev */ 2622be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 26333e61169SVladimir Kondratiev struct sk_buff *skb) 2642be7d22fSVladimir Kondratiev { 2652be7d22fSVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 2662be7d22fSVladimir Kondratiev struct wil6210_rtap { 2672be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 2682be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 2692be7d22fSVladimir Kondratiev /* flags */ 2702be7d22fSVladimir Kondratiev u8 flags; 2712be7d22fSVladimir Kondratiev /* channel */ 2722be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 2732be7d22fSVladimir Kondratiev __le16 chnl_flags; 2742be7d22fSVladimir Kondratiev /* MCS */ 2752be7d22fSVladimir Kondratiev u8 mcs_present; 2762be7d22fSVladimir Kondratiev u8 mcs_flags; 2772be7d22fSVladimir Kondratiev u8 mcs_index; 2782be7d22fSVladimir Kondratiev } __packed; 2792be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 2802be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 2812be7d22fSVladimir Kondratiev /* vendor */ 2822be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 2832be7d22fSVladimir Kondratiev u8 vendor_ns; 2842be7d22fSVladimir Kondratiev __le16 vendor_skip; 2852be7d22fSVladimir Kondratiev u8 vendor_data[0]; 2862be7d22fSVladimir Kondratiev } __packed; 28733e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 2882be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 2892be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 2902be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 2912be7d22fSVladimir Kondratiev static char phy_data[128]; 2922be7d22fSVladimir Kondratiev struct ieee80211_channel *ch = wdev->preset_chandef.chan; 2932be7d22fSVladimir Kondratiev 2942be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 2952be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 2962be7d22fSVladimir Kondratiev /* calculate additional length */ 2972be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 2982be7d22fSVladimir Kondratiev /** 2992be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3002be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3012be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3022be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3032be7d22fSVladimir Kondratiev */ 3042be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3052be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3068fe59627SVladimir Kondratiev 3072be7d22fSVladimir Kondratiev if (len > 8) { 3082be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3092be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3108fe59627SVladimir Kondratiev 3112be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3122be7d22fSVladimir Kondratiev phy_length = len - 8; 3132be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3142be7d22fSVladimir Kondratiev } 3152be7d22fSVladimir Kondratiev } 3162be7d22fSVladimir Kondratiev } 3172be7d22fSVladimir Kondratiev rtap_len += phy_length; 3182be7d22fSVladimir Kondratiev } 3192be7d22fSVladimir Kondratiev 3202be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3212be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3222be7d22fSVladimir Kondratiev wil_err(wil, "Unable to expand headrom to %d\n", rtap_len); 3232be7d22fSVladimir Kondratiev return; 3242be7d22fSVladimir Kondratiev } 3252be7d22fSVladimir Kondratiev 3262be7d22fSVladimir Kondratiev rtap_vendor = (void *)skb_push(skb, rtap_len); 3272be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3282be7d22fSVladimir Kondratiev 3292be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3302be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3312be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3322be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3332be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3342be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3352be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3362be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3372be7d22fSVladimir Kondratiev 3382be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3392be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3402be7d22fSVladimir Kondratiev 3412be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3422be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3432be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3442be7d22fSVladimir Kondratiev 3452be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3462be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3472be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3482be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3492be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3502be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3512be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 3522be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 3532be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 3542be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 3552be7d22fSVladimir Kondratiev phy_length); 3562be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 3572be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 3582be7d22fSVladimir Kondratiev phy_length); 3592be7d22fSVladimir Kondratiev } 3602be7d22fSVladimir Kondratiev } 3612be7d22fSVladimir Kondratiev 362a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 363a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 364a8313341SVladimir Kondratiev { 365a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 366a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 367a8313341SVladimir Kondratiev } 368a8313341SVladimir Kondratiev 3692be7d22fSVladimir Kondratiev /** 3702be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 3712be7d22fSVladimir Kondratiev * 37233e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 37333e61169SVladimir Kondratiev * 3742be7d22fSVladimir Kondratiev * Safe to call from IRQ 3752be7d22fSVladimir Kondratiev */ 3762be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 3772be7d22fSVladimir Kondratiev struct vring *vring) 3782be7d22fSVladimir Kondratiev { 3792be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 3802be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 38168ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 38268ada71eSVladimir Kondratiev struct vring_rx_desc *d; 3832be7d22fSVladimir Kondratiev struct sk_buff *skb; 3842be7d22fSVladimir Kondratiev dma_addr_t pa; 385c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 386c406ea7cSVladimir Kondratiev unsigned int sz = mtu_max + ETH_HLEN + snaplen; 3877e594444SVladimir Kondratiev u16 dmalen; 3882be7d22fSVladimir Kondratiev u8 ftype; 389c8b78b5fSVladimir Kondratiev int cid; 3903b282bc6SVladimir Kondratiev int i; 391c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 392c8b78b5fSVladimir Kondratiev 39333e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 39433e61169SVladimir Kondratiev 3953b282bc6SVladimir Kondratiev again: 39633c477fdSVladimir Kondratiev if (unlikely(wil_vring_is_empty(vring))) 3972be7d22fSVladimir Kondratiev return NULL; 3982be7d22fSVladimir Kondratiev 3993b282bc6SVladimir Kondratiev i = (int)vring->swhead; 400148416a9SVladimir Kondratiev _d = &vring->va[i].rx; 40133c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4022be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4032be7d22fSVladimir Kondratiev return NULL; 4042be7d22fSVladimir Kondratiev } 4052be7d22fSVladimir Kondratiev 406148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 407148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 408148416a9SVladimir Kondratiev wil_vring_advance_head(vring, 1); 409148416a9SVladimir Kondratiev if (!skb) { 410148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4113b282bc6SVladimir Kondratiev goto again; 412148416a9SVladimir Kondratiev } 41368ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 41468ada71eSVladimir Kondratiev *d = *_d; 41568ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 41668ada71eSVladimir Kondratiev 41768ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 41868ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 41968ada71eSVladimir Kondratiev 420148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 421148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 422a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 42368ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 42468ada71eSVladimir Kondratiev 4253b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4263b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4273b282bc6SVladimir Kondratiev 42833c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 429e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4303b282bc6SVladimir Kondratiev stats->rx_large_frame++; 431110dea00SWei Yongjun kfree_skb(skb); 4323b282bc6SVladimir Kondratiev goto again; 433e270045bSVladimir Kondratiev } 4347e594444SVladimir Kondratiev skb_trim(skb, dmalen); 43533e61169SVladimir Kondratiev 4361cbbcb08SVladimir Kondratiev prefetch(skb->data); 4371cbbcb08SVladimir Kondratiev 438c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 439c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 440c0d37713SVladimir Kondratiev 441c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 442c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 443c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4442be7d22fSVladimir Kondratiev 4452be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4462be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 44733e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4482be7d22fSVladimir Kondratiev 4492be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4502be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4512be7d22fSVladimir Kondratiev return skb; 452a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4532be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4542be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4552be7d22fSVladimir Kondratiev */ 45668ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 45733c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 458a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 459a8313341SVladimir Kondratiev int mid = wil_rxdesc_mid(d); 460a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 461a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 462a8313341SVladimir Kondratiev 463a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 464a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 465a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 4663b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 467a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 468a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 469a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 470a8313341SVladimir Kondratiev mid, cid, tid, seq); 471a8313341SVladimir Kondratiev wil_rx_bar(wil, cid, tid, seq); 472a8313341SVladimir Kondratiev } else { 473a8313341SVladimir Kondratiev /* print again all info. One can enable only this 474a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 475a8313341SVladimir Kondratiev */ 476a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 477a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 478a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 479a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 480a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 481a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 482a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 483a8313341SVladimir Kondratiev } 4842be7d22fSVladimir Kondratiev kfree_skb(skb); 4853b282bc6SVladimir Kondratiev goto again; 4862be7d22fSVladimir Kondratiev } 4872be7d22fSVladimir Kondratiev 488c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 4892be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 4903b282bc6SVladimir Kondratiev stats->rx_short_frame++; 4912be7d22fSVladimir Kondratiev kfree_skb(skb); 4923b282bc6SVladimir Kondratiev goto again; 4932be7d22fSVladimir Kondratiev } 4942be7d22fSVladimir Kondratiev 495504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 496504937d4SKirshenbaum Erez * and in case of error drop the packet 497504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 498504937d4SKirshenbaum Erez */ 49933c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 500504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 50133c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 502504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5034a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5044a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5054a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5064a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5074a68ab10SVladimir Kondratiev */ 508504937d4SKirshenbaum Erez } 509504937d4SKirshenbaum Erez 510c406ea7cSVladimir Kondratiev if (snaplen) { 511c406ea7cSVladimir Kondratiev /* Packet layout 512c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 513c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 514c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 515c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 516c406ea7cSVladimir Kondratiev */ 517c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 518c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 519c406ea7cSVladimir Kondratiev } 520c406ea7cSVladimir Kondratiev 5212be7d22fSVladimir Kondratiev return skb; 5222be7d22fSVladimir Kondratiev } 5232be7d22fSVladimir Kondratiev 5242be7d22fSVladimir Kondratiev /** 5252be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5262be7d22fSVladimir Kondratiev * buffers posted at @swtail 5272be7d22fSVladimir Kondratiev */ 5282be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5292be7d22fSVladimir Kondratiev { 5302be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 5312be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 5322be7d22fSVladimir Kondratiev u32 next_tail; 5332be7d22fSVladimir Kondratiev int rc = 0; 5342be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5352be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5362be7d22fSVladimir Kondratiev 5372be7d22fSVladimir Kondratiev for (; next_tail = wil_vring_next_tail(v), 5382be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5392be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5402be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 54133c477fdSVladimir Kondratiev if (unlikely(rc)) { 5422be7d22fSVladimir Kondratiev wil_err(wil, "Error %d in wil_rx_refill[%d]\n", 5432be7d22fSVladimir Kondratiev rc, v->swtail); 5442be7d22fSVladimir Kondratiev break; 5452be7d22fSVladimir Kondratiev } 5462be7d22fSVladimir Kondratiev } 547b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5482be7d22fSVladimir Kondratiev 5492be7d22fSVladimir Kondratiev return rc; 5502be7d22fSVladimir Kondratiev } 5512be7d22fSVladimir Kondratiev 5522be7d22fSVladimir Kondratiev /* 5532be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 554e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 5552be7d22fSVladimir Kondratiev */ 556b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 5572be7d22fSVladimir Kondratiev { 558c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 559c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 560c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 5612be7d22fSVladimir Kondratiev unsigned int len = skb->len; 562c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 56341d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 564c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 565c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 566c42da999SVladimir Kondratiev * is not suitable, need to look at data 567c42da999SVladimir Kondratiev */ 568c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 569c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 570c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 571c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 572c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 573c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 574c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 575c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 576c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 577c42da999SVladimir Kondratiev }; 5782be7d22fSVladimir Kondratiev 5790553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 5800553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 5810553640dSVladimir Shulman * set hash to any non-zero value to activate rps 5820553640dSVladimir Shulman * mechanism, core will be chosen according 5830553640dSVladimir Shulman * to user-level rps configuration. 5840553640dSVladimir Shulman */ 5850553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 5860553640dSVladimir Shulman 587241804cbSVladimir Kondratiev skb_orphan(skb); 588241804cbSVladimir Kondratiev 58902beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 590c42da999SVladimir Kondratiev if (mcast) { 591c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 592c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 593c42da999SVladimir Kondratiev */ 594c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 595c42da999SVladimir Kondratiev } else { 596c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 5972be7d22fSVladimir Kondratiev 598c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 599c42da999SVladimir Kondratiev /* The destination station is associated to 600c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 601c42da999SVladimir Kondratiev * directly to it and do not pass it to local 602c42da999SVladimir Kondratiev * net stack. 603c42da999SVladimir Kondratiev */ 604c42da999SVladimir Kondratiev xmit_skb = skb; 605c42da999SVladimir Kondratiev skb = NULL; 606c42da999SVladimir Kondratiev } 607c42da999SVladimir Kondratiev } 608c42da999SVladimir Kondratiev } 609c42da999SVladimir Kondratiev if (xmit_skb) { 610c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 611c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 612c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 613c42da999SVladimir Kondratiev */ 614c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 615c42da999SVladimir Kondratiev xmit_skb->priority += 256; 616c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 617c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 618c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 619c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 620c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 621c42da999SVladimir Kondratiev } 622c42da999SVladimir Kondratiev 623c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 624c42da999SVladimir Kondratiev 625c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 626c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 627c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 628c42da999SVladimir Kondratiev len, gro_res_str[rc]); 629c42da999SVladimir Kondratiev } 630c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 631b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 632b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 633b5998e6aSVladimir Kondratiev stats->rx_dropped++; 634b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 635b5998e6aSVladimir Kondratiev } else { 6362be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 637c8b78b5fSVladimir Kondratiev stats->rx_packets++; 6382be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 639c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 640c42da999SVladimir Kondratiev if (mcast) 641c42da999SVladimir Kondratiev ndev->stats.multicast++; 642194b482bSVladimir Kondratiev } 6432be7d22fSVladimir Kondratiev } 6442be7d22fSVladimir Kondratiev 6452be7d22fSVladimir Kondratiev /** 6462be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 6472be7d22fSVladimir Kondratiev * 648e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 6492be7d22fSVladimir Kondratiev */ 650e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 6512be7d22fSVladimir Kondratiev { 6522be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 6532be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 6542be7d22fSVladimir Kondratiev struct sk_buff *skb; 6552be7d22fSVladimir Kondratiev 65633c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 6572be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 6582be7d22fSVladimir Kondratiev return; 6592be7d22fSVladimir Kondratiev } 6607743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 661e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 662e0287c4aSVladimir Kondratiev (*quota)--; 6632be7d22fSVladimir Kondratiev 6642be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 6652be7d22fSVladimir Kondratiev skb->dev = ndev; 6662be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 6672be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 6682be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 6692be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 670b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 6712be7d22fSVladimir Kondratiev } else { 672b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 6732be7d22fSVladimir Kondratiev } 6742be7d22fSVladimir Kondratiev } 6752be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 6762be7d22fSVladimir Kondratiev } 6772be7d22fSVladimir Kondratiev 678d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 6792be7d22fSVladimir Kondratiev { 6802be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 6812be7d22fSVladimir Kondratiev int rc; 6822be7d22fSVladimir Kondratiev 6839cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 6849cf10d62SVladimir Kondratiev 6858bf6adb9SVladimir Kondratiev if (vring->va) { 6868bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 6878bf6adb9SVladimir Kondratiev return -EINVAL; 6888bf6adb9SVladimir Kondratiev } 6898bf6adb9SVladimir Kondratiev 690d3762b40SVladimir Kondratiev vring->size = size; 6912be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 6922be7d22fSVladimir Kondratiev if (rc) 6932be7d22fSVladimir Kondratiev return rc; 6942be7d22fSVladimir Kondratiev 69547e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 6962be7d22fSVladimir Kondratiev if (rc) 6972be7d22fSVladimir Kondratiev goto err_free; 6982be7d22fSVladimir Kondratiev 6992be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 7002be7d22fSVladimir Kondratiev if (rc) 7012be7d22fSVladimir Kondratiev goto err_free; 7022be7d22fSVladimir Kondratiev 7032be7d22fSVladimir Kondratiev return 0; 7042be7d22fSVladimir Kondratiev err_free: 7052be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7062be7d22fSVladimir Kondratiev 7072be7d22fSVladimir Kondratiev return rc; 7082be7d22fSVladimir Kondratiev } 7092be7d22fSVladimir Kondratiev 7102be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 7112be7d22fSVladimir Kondratiev { 7122be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7132be7d22fSVladimir Kondratiev 7149cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 7159cf10d62SVladimir Kondratiev 7162acb4220SVladimir Kondratiev if (vring->va) 7172be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7182be7d22fSVladimir Kondratiev } 7192be7d22fSVladimir Kondratiev 720875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 721875e9439SMaya Erez { 722875e9439SMaya Erez spin_lock_bh(&txdata->lock); 723875e9439SMaya Erez txdata->dot1x_open = 0; 724875e9439SMaya Erez txdata->enabled = 0; 725875e9439SMaya Erez txdata->idle = 0; 726875e9439SMaya Erez txdata->last_idle = 0; 727875e9439SMaya Erez txdata->begin = 0; 728875e9439SMaya Erez txdata->agg_wsize = 0; 729875e9439SMaya Erez txdata->agg_timeout = 0; 730875e9439SMaya Erez txdata->agg_amsdu = 0; 731875e9439SMaya Erez txdata->addba_in_progress = false; 732875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 733875e9439SMaya Erez } 734875e9439SMaya Erez 7352be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 7362be7d22fSVladimir Kondratiev int cid, int tid) 7372be7d22fSVladimir Kondratiev { 7382be7d22fSVladimir Kondratiev int rc; 7392be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 7402be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 7412be7d22fSVladimir Kondratiev .vring_cfg = { 7422be7d22fSVladimir Kondratiev .tx_sw_ring = { 7439a06bec9SVladimir Kondratiev .max_mpdu_size = 744c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 745b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 7462be7d22fSVladimir Kondratiev }, 7472be7d22fSVladimir Kondratiev .ringid = id, 748a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 7492be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 7502be7d22fSVladimir Kondratiev .mac_ctrl = 0, 7512be7d22fSVladimir Kondratiev .to_resolution = 0, 7523277213fSVladimir Kondratiev .agg_max_wsize = 0, 7532be7d22fSVladimir Kondratiev .schd_params = { 7542be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 7552be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 7562be7d22fSVladimir Kondratiev }, 7572be7d22fSVladimir Kondratiev }, 7582be7d22fSVladimir Kondratiev }; 7592be7d22fSVladimir Kondratiev struct { 7602be7d22fSVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 7612be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 7622be7d22fSVladimir Kondratiev } __packed reply; 7632be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 764097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 7652be7d22fSVladimir Kondratiev 766e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 767e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 7689b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 7699cf10d62SVladimir Kondratiev 7702be7d22fSVladimir Kondratiev if (vring->va) { 7712be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 7722be7d22fSVladimir Kondratiev rc = -EINVAL; 7732be7d22fSVladimir Kondratiev goto out; 7742be7d22fSVladimir Kondratiev } 7752be7d22fSVladimir Kondratiev 776875e9439SMaya Erez wil_tx_data_init(txdata); 7772be7d22fSVladimir Kondratiev vring->size = size; 7782be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7792be7d22fSVladimir Kondratiev if (rc) 7802be7d22fSVladimir Kondratiev goto out; 7812be7d22fSVladimir Kondratiev 78293ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 78393ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 78493ae6d49SVladimir Kondratiev 7852be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 7862be7d22fSVladimir Kondratiev 787230d8442SVladimir Kondratiev if (!wil->privacy) 788230d8442SVladimir Kondratiev txdata->dot1x_open = true; 7892be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 7902be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 7912be7d22fSVladimir Kondratiev if (rc) 7922be7d22fSVladimir Kondratiev goto out_free; 7932be7d22fSVladimir Kondratiev 794b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 7952be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 7962be7d22fSVladimir Kondratiev reply.cmd.status); 797c331997bSVladimir Kondratiev rc = -EINVAL; 7982be7d22fSVladimir Kondratiev goto out_free; 7992be7d22fSVladimir Kondratiev } 8002be7d22fSVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 8012be7d22fSVladimir Kondratiev 802097638a0SVladimir Kondratiev txdata->enabled = 1; 803230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 8043a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 805097638a0SVladimir Kondratiev 8062be7d22fSVladimir Kondratiev return 0; 8072be7d22fSVladimir Kondratiev out_free: 808875e9439SMaya Erez spin_lock_bh(&txdata->lock); 809230d8442SVladimir Kondratiev txdata->dot1x_open = false; 810230d8442SVladimir Kondratiev txdata->enabled = 0; 811875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 8122be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8130916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 8140916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 8150916d9f2SMaya Erez 8162be7d22fSVladimir Kondratiev out: 8172be7d22fSVladimir Kondratiev 8182be7d22fSVladimir Kondratiev return rc; 8192be7d22fSVladimir Kondratiev } 8202be7d22fSVladimir Kondratiev 82141d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 82241d6b093SVladimir Kondratiev { 82341d6b093SVladimir Kondratiev int rc; 82441d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 82541d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 82641d6b093SVladimir Kondratiev .vring_cfg = { 82741d6b093SVladimir Kondratiev .tx_sw_ring = { 82841d6b093SVladimir Kondratiev .max_mpdu_size = 82941d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 83041d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 83141d6b093SVladimir Kondratiev }, 83241d6b093SVladimir Kondratiev .ringid = id, 83341d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 83441d6b093SVladimir Kondratiev }, 83541d6b093SVladimir Kondratiev }; 83641d6b093SVladimir Kondratiev struct { 83741d6b093SVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 83841d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 83941d6b093SVladimir Kondratiev } __packed reply; 84041d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 84141d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 84241d6b093SVladimir Kondratiev 84341d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 84441d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8459b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 84641d6b093SVladimir Kondratiev 84741d6b093SVladimir Kondratiev if (vring->va) { 84841d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 84941d6b093SVladimir Kondratiev rc = -EINVAL; 85041d6b093SVladimir Kondratiev goto out; 85141d6b093SVladimir Kondratiev } 85241d6b093SVladimir Kondratiev 853875e9439SMaya Erez wil_tx_data_init(txdata); 85441d6b093SVladimir Kondratiev vring->size = size; 85541d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 85641d6b093SVladimir Kondratiev if (rc) 85741d6b093SVladimir Kondratiev goto out; 85841d6b093SVladimir Kondratiev 85941d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 86041d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 86141d6b093SVladimir Kondratiev 86241d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 86341d6b093SVladimir Kondratiev 864230d8442SVladimir Kondratiev if (!wil->privacy) 865230d8442SVladimir Kondratiev txdata->dot1x_open = true; 86641d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 86741d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 86841d6b093SVladimir Kondratiev if (rc) 86941d6b093SVladimir Kondratiev goto out_free; 87041d6b093SVladimir Kondratiev 87141d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 87241d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 87341d6b093SVladimir Kondratiev reply.cmd.status); 87441d6b093SVladimir Kondratiev rc = -EINVAL; 87541d6b093SVladimir Kondratiev goto out_free; 87641d6b093SVladimir Kondratiev } 87741d6b093SVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 87841d6b093SVladimir Kondratiev 87941d6b093SVladimir Kondratiev txdata->enabled = 1; 88041d6b093SVladimir Kondratiev 88141d6b093SVladimir Kondratiev return 0; 88241d6b093SVladimir Kondratiev out_free: 883875e9439SMaya Erez spin_lock_bh(&txdata->lock); 884230d8442SVladimir Kondratiev txdata->enabled = 0; 885230d8442SVladimir Kondratiev txdata->dot1x_open = false; 886875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 88741d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 88841d6b093SVladimir Kondratiev out: 88941d6b093SVladimir Kondratiev 89041d6b093SVladimir Kondratiev return rc; 89141d6b093SVladimir Kondratiev } 89241d6b093SVladimir Kondratiev 8932be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 8942be7d22fSVladimir Kondratiev { 8952be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 8963a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8972be7d22fSVladimir Kondratiev 8989b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 899097638a0SVladimir Kondratiev 9002be7d22fSVladimir Kondratiev if (!vring->va) 9012be7d22fSVladimir Kondratiev return; 9022be7d22fSVladimir Kondratiev 9039cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 9049cf10d62SVladimir Kondratiev 9055933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 906230d8442SVladimir Kondratiev txdata->dot1x_open = false; 9075933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 9085933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 909097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 9109419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 911097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 912097638a0SVladimir Kondratiev 9132be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9142be7d22fSVladimir Kondratiev } 9152be7d22fSVladimir Kondratiev 91641d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 9172be7d22fSVladimir Kondratiev struct sk_buff *skb) 9182be7d22fSVladimir Kondratiev { 9193df2cd36SVladimir Kondratiev int i; 9203df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 9213df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 9222be7d22fSVladimir Kondratiev 9233df2cd36SVladimir Kondratiev if (cid < 0) 9243df2cd36SVladimir Kondratiev return NULL; 9253df2cd36SVladimir Kondratiev 9263df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 9273df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 928230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 929230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 930230d8442SVladimir Kondratiev continue; 9313df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 9323df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 933b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 9348fe59627SVladimir Kondratiev 9353df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 9363df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 937b729aaf0SMaya Erez if (v->va && txdata->enabled) { 9382be7d22fSVladimir Kondratiev return v; 9393df2cd36SVladimir Kondratiev } else { 9403df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 9413df2cd36SVladimir Kondratiev return NULL; 9423df2cd36SVladimir Kondratiev } 9433df2cd36SVladimir Kondratiev } 9443df2cd36SVladimir Kondratiev } 9452be7d22fSVladimir Kondratiev 9462be7d22fSVladimir Kondratiev return NULL; 9472be7d22fSVladimir Kondratiev } 9482be7d22fSVladimir Kondratiev 949fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 950fb3cac57SVladimir Kondratiev struct sk_buff *skb); 95154ed90a8SVladimir Kondratiev 95254ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 95354ed90a8SVladimir Kondratiev struct sk_buff *skb) 95454ed90a8SVladimir Kondratiev { 95554ed90a8SVladimir Kondratiev struct vring *v; 95654ed90a8SVladimir Kondratiev int i; 95754ed90a8SVladimir Kondratiev u8 cid; 958b729aaf0SMaya Erez struct vring_tx_data *txdata; 95954ed90a8SVladimir Kondratiev 96054ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 96154ed90a8SVladimir Kondratiev * for the AP we connected to. 962230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 96354ed90a8SVladimir Kondratiev */ 96454ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 96554ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 966b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 967b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 96854ed90a8SVladimir Kondratiev continue; 96954ed90a8SVladimir Kondratiev 97054ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 97141d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 97241d6b093SVladimir Kondratiev continue; 97341d6b093SVladimir Kondratiev 974230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 97554ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 976230d8442SVladimir Kondratiev continue; 97754ed90a8SVladimir Kondratiev 97854ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 97954ed90a8SVladimir Kondratiev 98054ed90a8SVladimir Kondratiev return v; 98154ed90a8SVladimir Kondratiev } 98254ed90a8SVladimir Kondratiev 98354ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 98454ed90a8SVladimir Kondratiev 98554ed90a8SVladimir Kondratiev return NULL; 98654ed90a8SVladimir Kondratiev } 98754ed90a8SVladimir Kondratiev 98870812421SVladimir Kondratiev /* Use one of 2 strategies: 98970812421SVladimir Kondratiev * 99070812421SVladimir Kondratiev * 1. New (real broadcast): 99170812421SVladimir Kondratiev * use dedicated broadcast vring 99270812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 99370812421SVladimir Kondratiev * Find 1-st vring and return it; 99470812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 99570812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 99670812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 99770812421SVladimir Kondratiev * - for PBSS 99870812421SVladimir Kondratiev */ 99970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1000fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1001fb3cac57SVladimir Kondratiev { 100241d6b093SVladimir Kondratiev struct vring *v; 1003b729aaf0SMaya Erez struct vring_tx_data *txdata; 100441d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1005fb3cac57SVladimir Kondratiev 100641d6b093SVladimir Kondratiev if (i < 0) 100741d6b093SVladimir Kondratiev return NULL; 1008fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1009b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1010b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1011fb3cac57SVladimir Kondratiev return NULL; 1012230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1013230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1014230d8442SVladimir Kondratiev return NULL; 1015fb3cac57SVladimir Kondratiev 1016fb3cac57SVladimir Kondratiev return v; 1017fb3cac57SVladimir Kondratiev } 1018fb3cac57SVladimir Kondratiev 101970812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 102070812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 102170812421SVladimir Kondratiev { 102270812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 102370812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 102470812421SVladimir Kondratiev 102570812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 102670812421SVladimir Kondratiev } 102770812421SVladimir Kondratiev 102870812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 102970812421SVladimir Kondratiev struct sk_buff *skb) 103070812421SVladimir Kondratiev { 103170812421SVladimir Kondratiev struct vring *v, *v2; 103270812421SVladimir Kondratiev struct sk_buff *skb2; 103370812421SVladimir Kondratiev int i; 103470812421SVladimir Kondratiev u8 cid; 103570812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 103670812421SVladimir Kondratiev char *src = eth->h_source; 1037b729aaf0SMaya Erez struct vring_tx_data *txdata; 103870812421SVladimir Kondratiev 103970812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 104070812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 104170812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1042b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1043b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 104470812421SVladimir Kondratiev continue; 104570812421SVladimir Kondratiev 104670812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 104770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 104870812421SVladimir Kondratiev continue; 1049230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1050230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 105170812421SVladimir Kondratiev continue; 105270812421SVladimir Kondratiev 105370812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 105470812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 105570812421SVladimir Kondratiev continue; 105670812421SVladimir Kondratiev 105770812421SVladimir Kondratiev goto found; 105870812421SVladimir Kondratiev } 105970812421SVladimir Kondratiev 106070812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 106170812421SVladimir Kondratiev 106270812421SVladimir Kondratiev return NULL; 106370812421SVladimir Kondratiev 106470812421SVladimir Kondratiev found: 106570812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 106670812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 106770812421SVladimir Kondratiev 106870812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 106970812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 107070812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 107170812421SVladimir Kondratiev if (!v2->va) 107270812421SVladimir Kondratiev continue; 107370812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 107470812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 107570812421SVladimir Kondratiev continue; 1076230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1077230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 107870812421SVladimir Kondratiev continue; 107970812421SVladimir Kondratiev 108070812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 108170812421SVladimir Kondratiev continue; 108270812421SVladimir Kondratiev 108370812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 108470812421SVladimir Kondratiev if (skb2) { 108570812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 108670812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 108770812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 108870812421SVladimir Kondratiev } else { 108970812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 109070812421SVladimir Kondratiev } 109170812421SVladimir Kondratiev } 109270812421SVladimir Kondratiev 109370812421SVladimir Kondratiev return v; 109470812421SVladimir Kondratiev } 109570812421SVladimir Kondratiev 109670812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 109770812421SVladimir Kondratiev struct sk_buff *skb) 109870812421SVladimir Kondratiev { 109970812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 110070812421SVladimir Kondratiev 110170812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 110270812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 110370812421SVladimir Kondratiev 110470812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 110570812421SVladimir Kondratiev } 110670812421SVladimir Kondratiev 110799b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 110899b55bd2SKirshenbaum Erez int vring_index) 11092be7d22fSVladimir Kondratiev { 111068ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 11112be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 11122be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 11132be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 11142be7d22fSVladimir Kondratiev d->dma.error = 0; 11152be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11167e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 111799b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 11182be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 11192be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 11202be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 11212be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 11222be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 11232be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 11242be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 11252be7d22fSVladimir Kondratiev 11262be7d22fSVladimir Kondratiev return 0; 11272be7d22fSVladimir Kondratiev } 11282be7d22fSVladimir Kondratiev 1129c236658fSVladimir Kondratiev static inline 1130c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1131c236658fSVladimir Kondratiev { 11323d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1133c236658fSVladimir Kondratiev } 1134c236658fSVladimir Kondratiev 11353d4bde15SVladimir Kondratiev /** 11363d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 11373d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 11383d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 11393d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 11403d4bde15SVladimir Kondratiev */ 11413d4bde15SVladimir Kondratiev 11423d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 11433d4bde15SVladimir Kondratiev struct sk_buff *skb, 11443d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 11453d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1146504937d4SKirshenbaum Erez { 11473d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 11483d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 11493d4bde15SVladimir Kondratiev 11503d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 11513d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 11523d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 11533d4bde15SVladimir Kondratiev 11543d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 11553d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 11563d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 11573d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 11583d4bde15SVladimir Kondratiev 11593d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 11603d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 11613d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 11623d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 11633d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 11643d4bde15SVladimir Kondratiev } 11653d4bde15SVladimir Kondratiev 11663d4bde15SVladimir Kondratiev /** 11673d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 11683d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 11693d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 11703d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 11713d4bde15SVladimir Kondratiev * 11723d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 11733d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 11743d4bde15SVladimir Kondratiev */ 11753d4bde15SVladimir Kondratiev 11763d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 11773d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1178504937d4SKirshenbaum Erez int protocol; 1179504937d4SKirshenbaum Erez 1180504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1181504937d4SKirshenbaum Erez return 0; 1182504937d4SKirshenbaum Erez 1183df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1184df2d08eeSVladimir Kondratiev 1185504937d4SKirshenbaum Erez switch (skb->protocol) { 1186504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1187504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1188df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1189504937d4SKirshenbaum Erez break; 1190504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1191504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1192504937d4SKirshenbaum Erez break; 1193504937d4SKirshenbaum Erez default: 1194504937d4SKirshenbaum Erez return -EINVAL; 1195504937d4SKirshenbaum Erez } 1196504937d4SKirshenbaum Erez 1197504937d4SKirshenbaum Erez switch (protocol) { 1198504937d4SKirshenbaum Erez case IPPROTO_TCP: 1199504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1200504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1201504937d4SKirshenbaum Erez d->dma.d0 |= 1202504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1203504937d4SKirshenbaum Erez break; 1204504937d4SKirshenbaum Erez case IPPROTO_UDP: 1205504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1206504937d4SKirshenbaum Erez d->dma.d0 |= 1207504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1208504937d4SKirshenbaum Erez break; 1209504937d4SKirshenbaum Erez default: 1210504937d4SKirshenbaum Erez return -EINVAL; 1211504937d4SKirshenbaum Erez } 1212504937d4SKirshenbaum Erez 1213504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1214504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1215504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1216504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1217504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1218504937d4SKirshenbaum Erez 1219504937d4SKirshenbaum Erez return 0; 1220504937d4SKirshenbaum Erez } 1221504937d4SKirshenbaum Erez 12223d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 12233d4bde15SVladimir Kondratiev { 12243d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 12253d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 12263d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 12273d4bde15SVladimir Kondratiev } 12283d4bde15SVladimir Kondratiev 12293d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 12303d4bde15SVladimir Kondratiev { 12313d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 12323d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 12333d4bde15SVladimir Kondratiev } 12343d4bde15SVladimir Kondratiev 12353d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 12363d4bde15SVladimir Kondratiev struct sk_buff *skb) 12373d4bde15SVladimir Kondratiev { 12383d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 12393d4bde15SVladimir Kondratiev 12403d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 12413d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 12423d4bde15SVladimir Kondratiev *_first_desc = NULL; 12433d4bde15SVladimir Kondratiev 12443d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 12453d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 12463d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 12473d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 12483d4bde15SVladimir Kondratiev 12493d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 12503d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 12513d4bde15SVladimir Kondratiev 12523d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 12533d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 12543d4bde15SVladimir Kondratiev 12553d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 12563d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 12573d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 12583d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 12593d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 12603d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 12613d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 12623d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 12633d4bde15SVladimir Kondratiev uint i = swhead; 12643d4bde15SVladimir Kondratiev dma_addr_t pa; 12653d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 12663d4bde15SVladimir Kondratiev int rem_data = mss; 12673d4bde15SVladimir Kondratiev int lenmss; 12683d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 12693d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 12703d4bde15SVladimir Kondratiev bool is_ipv4; 12713d4bde15SVladimir Kondratiev int tcp_hdr_len; 12723d4bde15SVladimir Kondratiev int skb_net_hdr_len; 12733d4bde15SVladimir Kondratiev int gso_type; 1274e3d2ed94SHamad Kadmany int rc = -EINVAL; 12753d4bde15SVladimir Kondratiev 12763d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 12773d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 12783d4bde15SVladimir Kondratiev 12793d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 12803d4bde15SVladimir Kondratiev return -EINVAL; 12813d4bde15SVladimir Kondratiev 12823d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 12833d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 12843d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 12853d4bde15SVladimir Kondratiev * this is the initial check only. 12863d4bde15SVladimir Kondratiev */ 12873d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 12883d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 12893d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 12903d4bde15SVladimir Kondratiev vring_index, min_desc_required); 12913d4bde15SVladimir Kondratiev return -ENOMEM; 12923d4bde15SVladimir Kondratiev } 12933d4bde15SVladimir Kondratiev 12943d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 12953d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 12963d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 12973d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 12983d4bde15SVladimir Kondratiev 12993d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 13003d4bde15SVladimir Kondratiev switch (gso_type) { 13013d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 13023d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 13033d4bde15SVladimir Kondratiev * as required by the offloading doc 13043d4bde15SVladimir Kondratiev */ 13053d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 13063d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 13073d4bde15SVladimir Kondratiev is_ipv4 = true; 13083d4bde15SVladimir Kondratiev break; 13093d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 13103d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 13113d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 13123d4bde15SVladimir Kondratiev is_ipv4 = false; 13133d4bde15SVladimir Kondratiev break; 13143d4bde15SVladimir Kondratiev default: 13153d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 13163d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 13173d4bde15SVladimir Kondratiev */ 13183d4bde15SVladimir Kondratiev return -EINVAL; 13193d4bde15SVladimir Kondratiev } 13203d4bde15SVladimir Kondratiev 13213d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 13223d4bde15SVladimir Kondratiev return -EINVAL; 13233d4bde15SVladimir Kondratiev 13243d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 13253d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 13263d4bde15SVladimir Kondratiev */ 13273d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 13283d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 13293d4bde15SVladimir Kondratiev 13303d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 13313d4bde15SVladimir Kondratiev 13323d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 13333d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 13343d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 13353d4bde15SVladimir Kondratiev goto err_exit; 13363d4bde15SVladimir Kondratiev } 13373d4bde15SVladimir Kondratiev 13383d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 13393d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 13403d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 13413d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 13423d4bde15SVladimir Kondratiev 13433d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 13443d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 13453d4bde15SVladimir Kondratiev 13463d4bde15SVladimir Kondratiev descs_used++; 13473d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 13483d4bde15SVladimir Kondratiev 13493d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 13503d4bde15SVladimir Kondratiev if (headlen) { 13513d4bde15SVladimir Kondratiev len = headlen; 13523d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 13533d4bde15SVladimir Kondratiev len); 13543d4bde15SVladimir Kondratiev } else { 13553d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 13563d4bde15SVladimir Kondratiev len = frag->size; 13573d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 13583d4bde15SVladimir Kondratiev } 13593d4bde15SVladimir Kondratiev 13603d4bde15SVladimir Kondratiev while (len) { 13613d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 13623d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 13633d4bde15SVladimir Kondratiev len, rem_data, descs_used); 13643d4bde15SVladimir Kondratiev 13653d4bde15SVladimir Kondratiev if (descs_used == avail) { 1366e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1367e3d2ed94SHamad Kadmany rc = -ENOMEM; 1368e3d2ed94SHamad Kadmany goto mem_error; 13693d4bde15SVladimir Kondratiev } 13703d4bde15SVladimir Kondratiev 13713d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 13723d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 13733d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 13743d4bde15SVladimir Kondratiev 13753d4bde15SVladimir Kondratiev if (!headlen) { 13763d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 13773d4bde15SVladimir Kondratiev frag->size - len, lenmss, 13783d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13793d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 13803d4bde15SVladimir Kondratiev } else { 13813d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 13823d4bde15SVladimir Kondratiev skb->data + 13833d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 13843d4bde15SVladimir Kondratiev lenmss, 13853d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13863d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 13873d4bde15SVladimir Kondratiev headlen -= lenmss; 13883d4bde15SVladimir Kondratiev } 13893d4bde15SVladimir Kondratiev 1390e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1391e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1392e3d2ed94SHamad Kadmany goto mem_error; 1393e3d2ed94SHamad Kadmany } 13943d4bde15SVladimir Kondratiev 13953d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 13963d4bde15SVladimir Kondratiev 13973d4bde15SVladimir Kondratiev if (!_first_desc) { 13983d4bde15SVladimir Kondratiev _first_desc = _desc; 13993d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 14003d4bde15SVladimir Kondratiev d = first_desc; 14013d4bde15SVladimir Kondratiev } else { 14023d4bde15SVladimir Kondratiev d = &desc_mem; 14033d4bde15SVladimir Kondratiev } 14043d4bde15SVladimir Kondratiev 14053d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 14063d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 14073d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 14083d4bde15SVladimir Kondratiev skb_net_hdr_len); 14093d4bde15SVladimir Kondratiev 14103d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 14113d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 14123d4bde15SVladimir Kondratiev 14133d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 14143d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 14153d4bde15SVladimir Kondratiev len -= lenmss; 14163d4bde15SVladimir Kondratiev rem_data -= lenmss; 14173d4bde15SVladimir Kondratiev 14183d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14193d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 14203d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 14213d4bde15SVladimir Kondratiev 14223d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 14233d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 14243d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 14253d4bde15SVladimir Kondratiev /* first segment include hdr desc for 14263d4bde15SVladimir Kondratiev * release 14273d4bde15SVladimir Kondratiev */ 14283d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 14293d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 14303d4bde15SVladimir Kondratiev sg_desc_cnt + 14313d4bde15SVladimir Kondratiev 1); 14323d4bde15SVladimir Kondratiev hdr_compensation_need = false; 14333d4bde15SVladimir Kondratiev } else { 14343d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 14353d4bde15SVladimir Kondratiev sg_desc_cnt); 14363d4bde15SVladimir Kondratiev } 14373d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 14383d4bde15SVladimir Kondratiev 14393d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 14403d4bde15SVladimir Kondratiev 14413d4bde15SVladimir Kondratiev /* first descriptor may also be the last 14423d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 14433d4bde15SVladimir Kondratiev * it twice 14443d4bde15SVladimir Kondratiev */ 14453d4bde15SVladimir Kondratiev if (first_desc != d) 14463d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 14473d4bde15SVladimir Kondratiev 14483d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 14493d4bde15SVladimir Kondratiev * of this TS processing 14503d4bde15SVladimir Kondratiev */ 14513d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 14523d4bde15SVladimir Kondratiev *_desc = *d; 14533d4bde15SVladimir Kondratiev 14543d4bde15SVladimir Kondratiev rem_data = mss; 14553d4bde15SVladimir Kondratiev _first_desc = NULL; 14563d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 14573d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 14583d4bde15SVladimir Kondratiev *_desc = *d; 14593d4bde15SVladimir Kondratiev } 14603d4bde15SVladimir Kondratiev } 14613d4bde15SVladimir Kondratiev 14623d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 14633d4bde15SVladimir Kondratiev * in this case d pointer is invalid 14643d4bde15SVladimir Kondratiev */ 14653d4bde15SVladimir Kondratiev if (_first_desc == _desc) 14663d4bde15SVladimir Kondratiev d = first_desc; 14673d4bde15SVladimir Kondratiev 14683d4bde15SVladimir Kondratiev /* Last data descriptor */ 14693d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 14703d4bde15SVladimir Kondratiev *_desc = *d; 14713d4bde15SVladimir Kondratiev 14723d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 14733d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 14743d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 14753d4bde15SVladimir Kondratiev 14763d4bde15SVladimir Kondratiev /* hold reference to skb 14773d4bde15SVladimir Kondratiev * to prevent skb release before accounting 14783d4bde15SVladimir Kondratiev * in case of immediate "tx done" 14793d4bde15SVladimir Kondratiev */ 14803d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 14813d4bde15SVladimir Kondratiev 14823d4bde15SVladimir Kondratiev /* performance monitoring */ 14833d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 14843d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 14853d4bde15SVladimir Kondratiev used, used + descs_used)) { 14863d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 14873d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 14883d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 14893d4bde15SVladimir Kondratiev } 14903d4bde15SVladimir Kondratiev 14913d4bde15SVladimir Kondratiev /* advance swhead */ 14923d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1493e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 14943d4bde15SVladimir Kondratiev 14953d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 14963d4bde15SVladimir Kondratiev * committing them to HW 14973d4bde15SVladimir Kondratiev */ 14983d4bde15SVladimir Kondratiev wmb(); 14993d4bde15SVladimir Kondratiev 1500b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 15013d4bde15SVladimir Kondratiev return 0; 15023d4bde15SVladimir Kondratiev 1503e3d2ed94SHamad Kadmany mem_error: 15043d4bde15SVladimir Kondratiev while (descs_used > 0) { 15053d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 15063d4bde15SVladimir Kondratiev 15073d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15083d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 15093d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15103d4bde15SVladimir Kondratiev *d = *_desc; 15113d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 15123d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 15133d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 15143d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 15153d4bde15SVladimir Kondratiev descs_used--; 15163d4bde15SVladimir Kondratiev } 15173d4bde15SVladimir Kondratiev err_exit: 1518e3d2ed94SHamad Kadmany return rc; 15193d4bde15SVladimir Kondratiev } 15203d4bde15SVladimir Kondratiev 15215933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 15222be7d22fSVladimir Kondratiev struct sk_buff *skb) 15232be7d22fSVladimir Kondratiev { 15242be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 152568ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 152668ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 15272be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 15282be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 15292be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1530504937d4SKirshenbaum Erez uint f = 0; 15312be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 15327c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 15332be7d22fSVladimir Kondratiev uint i = swhead; 15342be7d22fSVladimir Kondratiev dma_addr_t pa; 15350436fd9aSVladimir Shulman int used; 153641d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 153741d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 15382be7d22fSVladimir Kondratiev 15393d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 15403d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 15412be7d22fSVladimir Kondratiev 15425933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 15435933a06dSVladimir Kondratiev return -EINVAL; 15445933a06dSVladimir Kondratiev 154533c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 154670801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 15475b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 15485b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 15492be7d22fSVladimir Kondratiev return -ENOMEM; 15502be7d22fSVladimir Kondratiev } 15518fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 15522be7d22fSVladimir Kondratiev 15538fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 15542be7d22fSVladimir Kondratiev 15555b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 15565b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 15577743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 15582be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 15592be7d22fSVladimir Kondratiev 15602be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 15612be7d22fSVladimir Kondratiev return -EINVAL; 15622232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15632be7d22fSVladimir Kondratiev /* 1-st segment */ 156441d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 156541d6b093SVladimir Kondratiev if (unlikely(mcast)) { 156641d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1567230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 156841d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 156941d6b093SVladimir Kondratiev } 1570504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 15713d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 15725b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1573504937d4SKirshenbaum Erez vring_index); 1574504937d4SKirshenbaum Erez goto dma_error; 1575504937d4SKirshenbaum Erez } 1576504937d4SKirshenbaum Erez 1577c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 15783d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 157968ada71eSVladimir Kondratiev 15802be7d22fSVladimir Kondratiev /* middle segments */ 1581504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 15822be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 15832be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 15842be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 15858fe59627SVladimir Kondratiev 1586e59d16c0SVladimir Kondratiev *_d = *d; 15875b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15885b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15895b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15902be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 15918fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 15922be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 15932be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1594e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1595e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1596e3d2ed94SHamad Kadmany vring_index); 15972be7d22fSVladimir Kondratiev goto dma_error; 1598e3d2ed94SHamad Kadmany } 15992232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 160099b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1601c236658fSVladimir Kondratiev /* no need to check return code - 1602c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1603c236658fSVladimir Kondratiev * it will succeed here too 1604c236658fSVladimir Kondratiev */ 16053d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 16062be7d22fSVladimir Kondratiev } 16072be7d22fSVladimir Kondratiev /* for the last seg only */ 16082be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1609668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 16102be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 161168ada71eSVladimir Kondratiev *_d = *d; 16125b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 16135b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 16145b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 16152be7d22fSVladimir Kondratiev 16166cdadd4dSVladimir Kondratiev /* hold reference to skb 16176cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 16186cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 16196cdadd4dSVladimir Kondratiev */ 16206cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16216cdadd4dSVladimir Kondratiev 16220436fd9aSVladimir Shulman /* performance monitoring */ 16230436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 16240436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 16250436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 16267c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16270436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16280436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 16290436fd9aSVladimir Shulman } 16307c0acf86SVladimir Kondratiev 16312be7d22fSVladimir Kondratiev /* advance swhead */ 16322be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 16335b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 16345b29c573SVladimir Kondratiev vring->swhead); 163598658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 16363d4bde15SVladimir Kondratiev 16373d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16383d4bde15SVladimir Kondratiev * committing them to HW 16393d4bde15SVladimir Kondratiev */ 16403d4bde15SVladimir Kondratiev wmb(); 16413d4bde15SVladimir Kondratiev 1642b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16432be7d22fSVladimir Kondratiev 16442be7d22fSVladimir Kondratiev return 0; 16452be7d22fSVladimir Kondratiev dma_error: 16462be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1647c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1648c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1649c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 16507e594444SVladimir Kondratiev 16512be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1652c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 16538fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 165468ada71eSVladimir Kondratiev *d = *_d; 165568ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 16562232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1657f88f113aSVladimir Kondratiev 1658f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16592be7d22fSVladimir Kondratiev } 16602be7d22fSVladimir Kondratiev 16612be7d22fSVladimir Kondratiev return -EINVAL; 16622be7d22fSVladimir Kondratiev } 16632be7d22fSVladimir Kondratiev 16645933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16655933a06dSVladimir Kondratiev struct sk_buff *skb) 16665933a06dSVladimir Kondratiev { 16675933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16685933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16695933a06dSVladimir Kondratiev int rc; 16705933a06dSVladimir Kondratiev 16715933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 16723d4bde15SVladimir Kondratiev 16733d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 16743d4bde15SVladimir Kondratiev (wil, vring, skb); 16753d4bde15SVladimir Kondratiev 16765933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 16773d4bde15SVladimir Kondratiev 16785933a06dSVladimir Kondratiev return rc; 16795933a06dSVladimir Kondratiev } 16805933a06dSVladimir Kondratiev 16812be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 16822be7d22fSVladimir Kondratiev { 16832be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 16843df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 168541d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 16862be7d22fSVladimir Kondratiev struct vring *vring; 1687aa27deaaSVladimir Kondratiev static bool pr_once_fw; 16882be7d22fSVladimir Kondratiev int rc; 16892be7d22fSVladimir Kondratiev 16907743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 169133c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1692aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 16932be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1694aa27deaaSVladimir Kondratiev pr_once_fw = true; 1695aa27deaaSVladimir Kondratiev } 16962be7d22fSVladimir Kondratiev goto drop; 16972be7d22fSVladimir Kondratiev } 169833c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1699a3dcbae2SVladimir Kondratiev wil_err_ratelimited(wil, "FW not connected\n"); 17002be7d22fSVladimir Kondratiev goto drop; 17012be7d22fSVladimir Kondratiev } 170233c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 17032be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 17042be7d22fSVladimir Kondratiev goto drop; 17052be7d22fSVladimir Kondratiev } 1706aa27deaaSVladimir Kondratiev pr_once_fw = false; 1707d58db4e4SVladimir Kondratiev 17082be7d22fSVladimir Kondratiev /* find vring */ 170954ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 171054ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 171154ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 171254ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 171341d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 171441d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 171554ed90a8SVladimir Kondratiev } 171633c477fdSVladimir Kondratiev if (unlikely(!vring)) { 17175aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 17182be7d22fSVladimir Kondratiev goto drop; 17192be7d22fSVladimir Kondratiev } 17202be7d22fSVladimir Kondratiev /* set up vring entry */ 17212be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1722d58db4e4SVladimir Kondratiev 17232232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 172433c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 17252232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 172655f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 172755f8f680SVladimir Kondratiev } 17282232abd5SVladimir Kondratiev 17292be7d22fSVladimir Kondratiev switch (rc) { 17302be7d22fSVladimir Kondratiev case 0: 1731795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 17322be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 17332be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 17342be7d22fSVladimir Kondratiev case -ENOMEM: 17352be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 17362be7d22fSVladimir Kondratiev default: 1737afda8bb5SVladimir Kondratiev break; /* goto drop; */ 17382be7d22fSVladimir Kondratiev } 17392be7d22fSVladimir Kondratiev drop: 17402be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 17412be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 17422be7d22fSVladimir Kondratiev 17432be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 17442be7d22fSVladimir Kondratiev } 17452be7d22fSVladimir Kondratiev 1746713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1747713c8a29SVladimir Kondratiev { 1748713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1749713c8a29SVladimir Kondratiev 1750713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1751713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1752713c8a29SVladimir Kondratiev } 1753713c8a29SVladimir Kondratiev 1754713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1755713c8a29SVladimir Kondratiev { 1756713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1757713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1758713c8a29SVladimir Kondratiev else 1759713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1760713c8a29SVladimir Kondratiev } 1761713c8a29SVladimir Kondratiev 17622be7d22fSVladimir Kondratiev /** 17632be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 17642be7d22fSVladimir Kondratiev * 1765e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1766e0287c4aSVladimir Kondratiev * 17672be7d22fSVladimir Kondratiev * Safe to call from IRQ 17682be7d22fSVladimir Kondratiev */ 1769e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 17702be7d22fSVladimir Kondratiev { 1771795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 17722be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17732be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1774097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1775e0287c4aSVladimir Kondratiev int done = 0; 1776c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 177741d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1778c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17790436fd9aSVladimir Shulman int used_before_complete; 17800436fd9aSVladimir Shulman int used_new; 17812be7d22fSVladimir Kondratiev 178233c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 17832be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1784e0287c4aSVladimir Kondratiev return 0; 17852be7d22fSVladimir Kondratiev } 17862be7d22fSVladimir Kondratiev 178733c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1788097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1789097638a0SVladimir Kondratiev return 0; 1790097638a0SVladimir Kondratiev } 1791097638a0SVladimir Kondratiev 17927743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 17932be7d22fSVladimir Kondratiev 17940436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 17950436fd9aSVladimir Shulman 179641d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 179741d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 179841d6b093SVladimir Kondratiev 17992be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1800c236658fSVladimir Kondratiev int new_swtail; 1801c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1802c236658fSVladimir Kondratiev /** 1803c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 18043d4bde15SVladimir Kondratiev * last fragment. look for it. 18053d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1806c236658fSVladimir Kondratiev */ 1807c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1808c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1809c236658fSVladimir Kondratiev 1810c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 181133c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1812c236658fSVladimir Kondratiev break; 1813c236658fSVladimir Kondratiev 1814c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1815c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 18164de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 18177e594444SVladimir Kondratiev u16 dmalen; 181876dfa4b7SVladimir Kondratiev struct sk_buff *skb; 181976dfa4b7SVladimir Kondratiev 182076dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 182176dfa4b7SVladimir Kondratiev skb = ctx->skb; 1822c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 18234de41befSVladimir Kondratiev 182468ada71eSVladimir Kondratiev *d = *_d; 18254de41befSVladimir Kondratiev 18267e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 182798658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 182898658095SVladimir Kondratiev d->dma.error); 18297743882dSVladimir Kondratiev wil_dbg_txrx(wil, 18305b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 18315b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 18325b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 18335b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 18342be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 18352be7d22fSVladimir Kondratiev 18362232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1837f88f113aSVladimir Kondratiev 18382be7d22fSVladimir Kondratiev if (skb) { 183933c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1840795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1841795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 184241d6b093SVladimir Kondratiev if (stats) { 184341d6b093SVladimir Kondratiev stats->tx_packets++; 1844c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 184541d6b093SVladimir Kondratiev } 1846795ce734SVladimir Kondratiev } else { 1847795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 184841d6b093SVladimir Kondratiev if (stats) 1849c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1850795ce734SVladimir Kondratiev } 1851713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 18522be7d22fSVladimir Kondratiev } 1853f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1854c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 185503269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 185603269c65SVladimir Kondratiev * so hardware will not try to process this desc., 185703269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 185803269c65SVladimir Kondratiev */ 18592be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1860e0287c4aSVladimir Kondratiev done++; 18612be7d22fSVladimir Kondratiev } 1862c236658fSVladimir Kondratiev } 186367c3e1b4SVladimir Kondratiev 18640436fd9aSVladimir Shulman /* performance monitoring */ 18650436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 18660436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 18670436fd9aSVladimir Shulman used_new, used_before_complete)) { 18680436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 18690436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 18707c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 18717c0acf86SVladimir Kondratiev } 187267c3e1b4SVladimir Kondratiev 187355f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 187455f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 18752be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 187655f8f680SVladimir Kondratiev } 1877e0287c4aSVladimir Kondratiev 1878e0287c4aSVladimir Kondratiev return done; 18792be7d22fSVladimir Kondratiev } 1880