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 7202be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 7212be7d22fSVladimir Kondratiev int cid, int tid) 7222be7d22fSVladimir Kondratiev { 7232be7d22fSVladimir Kondratiev int rc; 7242be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 7252be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 7262be7d22fSVladimir Kondratiev .vring_cfg = { 7272be7d22fSVladimir Kondratiev .tx_sw_ring = { 7289a06bec9SVladimir Kondratiev .max_mpdu_size = 729c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 730b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 7312be7d22fSVladimir Kondratiev }, 7322be7d22fSVladimir Kondratiev .ringid = id, 733a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 7342be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 7352be7d22fSVladimir Kondratiev .mac_ctrl = 0, 7362be7d22fSVladimir Kondratiev .to_resolution = 0, 7373277213fSVladimir Kondratiev .agg_max_wsize = 0, 7382be7d22fSVladimir Kondratiev .schd_params = { 7392be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 7402be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 7412be7d22fSVladimir Kondratiev }, 7422be7d22fSVladimir Kondratiev }, 7432be7d22fSVladimir Kondratiev }; 7442be7d22fSVladimir Kondratiev struct { 7452be7d22fSVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 7462be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 7472be7d22fSVladimir Kondratiev } __packed reply; 7482be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 749097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 7502be7d22fSVladimir Kondratiev 751e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 752e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 7539b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 7549cf10d62SVladimir Kondratiev 7552be7d22fSVladimir Kondratiev if (vring->va) { 7562be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 7572be7d22fSVladimir Kondratiev rc = -EINVAL; 7582be7d22fSVladimir Kondratiev goto out; 7592be7d22fSVladimir Kondratiev } 7602be7d22fSVladimir Kondratiev 761097638a0SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 7625933a06dSVladimir Kondratiev spin_lock_init(&txdata->lock); 7632be7d22fSVladimir Kondratiev vring->size = size; 7642be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7652be7d22fSVladimir Kondratiev if (rc) 7662be7d22fSVladimir Kondratiev goto out; 7672be7d22fSVladimir Kondratiev 76893ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 76993ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 77093ae6d49SVladimir Kondratiev 7712be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 7722be7d22fSVladimir Kondratiev 773230d8442SVladimir Kondratiev if (!wil->privacy) 774230d8442SVladimir Kondratiev txdata->dot1x_open = true; 7752be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 7762be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 7772be7d22fSVladimir Kondratiev if (rc) 7782be7d22fSVladimir Kondratiev goto out_free; 7792be7d22fSVladimir Kondratiev 780b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 7812be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 7822be7d22fSVladimir Kondratiev reply.cmd.status); 783c331997bSVladimir Kondratiev rc = -EINVAL; 7842be7d22fSVladimir Kondratiev goto out_free; 7852be7d22fSVladimir Kondratiev } 7862be7d22fSVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 7872be7d22fSVladimir Kondratiev 788097638a0SVladimir Kondratiev txdata->enabled = 1; 789230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 7903a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 791097638a0SVladimir Kondratiev 7922be7d22fSVladimir Kondratiev return 0; 7932be7d22fSVladimir Kondratiev out_free: 794230d8442SVladimir Kondratiev txdata->dot1x_open = false; 795230d8442SVladimir Kondratiev txdata->enabled = 0; 7962be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 7970916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 7980916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 7990916d9f2SMaya Erez 8002be7d22fSVladimir Kondratiev out: 8012be7d22fSVladimir Kondratiev 8022be7d22fSVladimir Kondratiev return rc; 8032be7d22fSVladimir Kondratiev } 8042be7d22fSVladimir Kondratiev 80541d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 80641d6b093SVladimir Kondratiev { 80741d6b093SVladimir Kondratiev int rc; 80841d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 80941d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 81041d6b093SVladimir Kondratiev .vring_cfg = { 81141d6b093SVladimir Kondratiev .tx_sw_ring = { 81241d6b093SVladimir Kondratiev .max_mpdu_size = 81341d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 81441d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 81541d6b093SVladimir Kondratiev }, 81641d6b093SVladimir Kondratiev .ringid = id, 81741d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 81841d6b093SVladimir Kondratiev }, 81941d6b093SVladimir Kondratiev }; 82041d6b093SVladimir Kondratiev struct { 82141d6b093SVladimir Kondratiev struct wil6210_mbox_hdr_wmi wmi; 82241d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 82341d6b093SVladimir Kondratiev } __packed reply; 82441d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 82541d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 82641d6b093SVladimir Kondratiev 82741d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 82841d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8299b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 83041d6b093SVladimir Kondratiev 83141d6b093SVladimir Kondratiev if (vring->va) { 83241d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 83341d6b093SVladimir Kondratiev rc = -EINVAL; 83441d6b093SVladimir Kondratiev goto out; 83541d6b093SVladimir Kondratiev } 83641d6b093SVladimir Kondratiev 83741d6b093SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 83841d6b093SVladimir Kondratiev spin_lock_init(&txdata->lock); 83941d6b093SVladimir Kondratiev vring->size = size; 84041d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 84141d6b093SVladimir Kondratiev if (rc) 84241d6b093SVladimir Kondratiev goto out; 84341d6b093SVladimir Kondratiev 84441d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 84541d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 84641d6b093SVladimir Kondratiev 84741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 84841d6b093SVladimir Kondratiev 849230d8442SVladimir Kondratiev if (!wil->privacy) 850230d8442SVladimir Kondratiev txdata->dot1x_open = true; 85141d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 85241d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 85341d6b093SVladimir Kondratiev if (rc) 85441d6b093SVladimir Kondratiev goto out_free; 85541d6b093SVladimir Kondratiev 85641d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 85741d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 85841d6b093SVladimir Kondratiev reply.cmd.status); 85941d6b093SVladimir Kondratiev rc = -EINVAL; 86041d6b093SVladimir Kondratiev goto out_free; 86141d6b093SVladimir Kondratiev } 86241d6b093SVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 86341d6b093SVladimir Kondratiev 86441d6b093SVladimir Kondratiev txdata->enabled = 1; 86541d6b093SVladimir Kondratiev 86641d6b093SVladimir Kondratiev return 0; 86741d6b093SVladimir Kondratiev out_free: 868230d8442SVladimir Kondratiev txdata->enabled = 0; 869230d8442SVladimir Kondratiev txdata->dot1x_open = false; 87041d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 87141d6b093SVladimir Kondratiev out: 87241d6b093SVladimir Kondratiev 87341d6b093SVladimir Kondratiev return rc; 87441d6b093SVladimir Kondratiev } 87541d6b093SVladimir Kondratiev 8762be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 8772be7d22fSVladimir Kondratiev { 8782be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 8793a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8802be7d22fSVladimir Kondratiev 8819b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 882097638a0SVladimir Kondratiev 8832be7d22fSVladimir Kondratiev if (!vring->va) 8842be7d22fSVladimir Kondratiev return; 8852be7d22fSVladimir Kondratiev 8869cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 8879cf10d62SVladimir Kondratiev 8885933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 889230d8442SVladimir Kondratiev txdata->dot1x_open = false; 8905933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 8915933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 892097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 8939419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 894097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 895097638a0SVladimir Kondratiev 8962be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8973a124ed6SVladimir Kondratiev memset(txdata, 0, sizeof(*txdata)); 8982be7d22fSVladimir Kondratiev } 8992be7d22fSVladimir Kondratiev 90041d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 9012be7d22fSVladimir Kondratiev struct sk_buff *skb) 9022be7d22fSVladimir Kondratiev { 9033df2cd36SVladimir Kondratiev int i; 9043df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 9053df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 9062be7d22fSVladimir Kondratiev 9073df2cd36SVladimir Kondratiev if (cid < 0) 9083df2cd36SVladimir Kondratiev return NULL; 9093df2cd36SVladimir Kondratiev 9103df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 9113df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 912230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 913230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 914230d8442SVladimir Kondratiev continue; 9153df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 9163df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 917b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 9188fe59627SVladimir Kondratiev 9193df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 9203df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 921b729aaf0SMaya Erez if (v->va && txdata->enabled) { 9222be7d22fSVladimir Kondratiev return v; 9233df2cd36SVladimir Kondratiev } else { 9243df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 9253df2cd36SVladimir Kondratiev return NULL; 9263df2cd36SVladimir Kondratiev } 9273df2cd36SVladimir Kondratiev } 9283df2cd36SVladimir Kondratiev } 9292be7d22fSVladimir Kondratiev 9302be7d22fSVladimir Kondratiev return NULL; 9312be7d22fSVladimir Kondratiev } 9322be7d22fSVladimir Kondratiev 933fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 934fb3cac57SVladimir Kondratiev struct sk_buff *skb); 93554ed90a8SVladimir Kondratiev 93654ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 93754ed90a8SVladimir Kondratiev struct sk_buff *skb) 93854ed90a8SVladimir Kondratiev { 93954ed90a8SVladimir Kondratiev struct vring *v; 94054ed90a8SVladimir Kondratiev int i; 94154ed90a8SVladimir Kondratiev u8 cid; 942b729aaf0SMaya Erez struct vring_tx_data *txdata; 94354ed90a8SVladimir Kondratiev 94454ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 94554ed90a8SVladimir Kondratiev * for the AP we connected to. 946230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 94754ed90a8SVladimir Kondratiev */ 94854ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 94954ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 950b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 951b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 95254ed90a8SVladimir Kondratiev continue; 95354ed90a8SVladimir Kondratiev 95454ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 95541d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 95641d6b093SVladimir Kondratiev continue; 95741d6b093SVladimir Kondratiev 958230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 95954ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 960230d8442SVladimir Kondratiev continue; 96154ed90a8SVladimir Kondratiev 96254ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 96354ed90a8SVladimir Kondratiev 96454ed90a8SVladimir Kondratiev return v; 96554ed90a8SVladimir Kondratiev } 96654ed90a8SVladimir Kondratiev 96754ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 96854ed90a8SVladimir Kondratiev 96954ed90a8SVladimir Kondratiev return NULL; 97054ed90a8SVladimir Kondratiev } 97154ed90a8SVladimir Kondratiev 97270812421SVladimir Kondratiev /* Use one of 2 strategies: 97370812421SVladimir Kondratiev * 97470812421SVladimir Kondratiev * 1. New (real broadcast): 97570812421SVladimir Kondratiev * use dedicated broadcast vring 97670812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 97770812421SVladimir Kondratiev * Find 1-st vring and return it; 97870812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 97970812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 98070812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 98170812421SVladimir Kondratiev * - for PBSS 98270812421SVladimir Kondratiev */ 98370812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 984fb3cac57SVladimir Kondratiev struct sk_buff *skb) 985fb3cac57SVladimir Kondratiev { 98641d6b093SVladimir Kondratiev struct vring *v; 987b729aaf0SMaya Erez struct vring_tx_data *txdata; 98841d6b093SVladimir Kondratiev int i = wil->bcast_vring; 989fb3cac57SVladimir Kondratiev 99041d6b093SVladimir Kondratiev if (i < 0) 99141d6b093SVladimir Kondratiev return NULL; 992fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 993b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 994b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 995fb3cac57SVladimir Kondratiev return NULL; 996230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 997230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 998230d8442SVladimir Kondratiev return NULL; 999fb3cac57SVladimir Kondratiev 1000fb3cac57SVladimir Kondratiev return v; 1001fb3cac57SVladimir Kondratiev } 1002fb3cac57SVladimir Kondratiev 100370812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 100470812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 100570812421SVladimir Kondratiev { 100670812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 100770812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 100870812421SVladimir Kondratiev 100970812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 101070812421SVladimir Kondratiev } 101170812421SVladimir Kondratiev 101270812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 101370812421SVladimir Kondratiev struct sk_buff *skb) 101470812421SVladimir Kondratiev { 101570812421SVladimir Kondratiev struct vring *v, *v2; 101670812421SVladimir Kondratiev struct sk_buff *skb2; 101770812421SVladimir Kondratiev int i; 101870812421SVladimir Kondratiev u8 cid; 101970812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 102070812421SVladimir Kondratiev char *src = eth->h_source; 1021b729aaf0SMaya Erez struct vring_tx_data *txdata; 102270812421SVladimir Kondratiev 102370812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 102470812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 102570812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1026b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1027b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 102870812421SVladimir Kondratiev continue; 102970812421SVladimir Kondratiev 103070812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 103170812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 103270812421SVladimir Kondratiev continue; 1033230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1034230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 103570812421SVladimir Kondratiev continue; 103670812421SVladimir Kondratiev 103770812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 103870812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 103970812421SVladimir Kondratiev continue; 104070812421SVladimir Kondratiev 104170812421SVladimir Kondratiev goto found; 104270812421SVladimir Kondratiev } 104370812421SVladimir Kondratiev 104470812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 104570812421SVladimir Kondratiev 104670812421SVladimir Kondratiev return NULL; 104770812421SVladimir Kondratiev 104870812421SVladimir Kondratiev found: 104970812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 105070812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 105170812421SVladimir Kondratiev 105270812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 105370812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 105470812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 105570812421SVladimir Kondratiev if (!v2->va) 105670812421SVladimir Kondratiev continue; 105770812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 105870812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 105970812421SVladimir Kondratiev continue; 1060230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1061230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 106270812421SVladimir Kondratiev continue; 106370812421SVladimir Kondratiev 106470812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 106570812421SVladimir Kondratiev continue; 106670812421SVladimir Kondratiev 106770812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 106870812421SVladimir Kondratiev if (skb2) { 106970812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 107070812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 107170812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 107270812421SVladimir Kondratiev } else { 107370812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 107470812421SVladimir Kondratiev } 107570812421SVladimir Kondratiev } 107670812421SVladimir Kondratiev 107770812421SVladimir Kondratiev return v; 107870812421SVladimir Kondratiev } 107970812421SVladimir Kondratiev 108070812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 108170812421SVladimir Kondratiev struct sk_buff *skb) 108270812421SVladimir Kondratiev { 108370812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 108470812421SVladimir Kondratiev 108570812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 108670812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 108770812421SVladimir Kondratiev 108870812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 108970812421SVladimir Kondratiev } 109070812421SVladimir Kondratiev 109199b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 109299b55bd2SKirshenbaum Erez int vring_index) 10932be7d22fSVladimir Kondratiev { 109468ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 10952be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 10962be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 10972be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 10982be7d22fSVladimir Kondratiev d->dma.error = 0; 10992be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11007e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 110199b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 11022be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 11032be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 11042be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 11052be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 11062be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 11072be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 11082be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 11092be7d22fSVladimir Kondratiev 11102be7d22fSVladimir Kondratiev return 0; 11112be7d22fSVladimir Kondratiev } 11122be7d22fSVladimir Kondratiev 1113c236658fSVladimir Kondratiev static inline 1114c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1115c236658fSVladimir Kondratiev { 11163d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1117c236658fSVladimir Kondratiev } 1118c236658fSVladimir Kondratiev 11193d4bde15SVladimir Kondratiev /** 11203d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 11213d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 11223d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 11233d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 11243d4bde15SVladimir Kondratiev */ 11253d4bde15SVladimir Kondratiev 11263d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 11273d4bde15SVladimir Kondratiev struct sk_buff *skb, 11283d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 11293d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1130504937d4SKirshenbaum Erez { 11313d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 11323d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 11333d4bde15SVladimir Kondratiev 11343d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 11353d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 11363d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 11373d4bde15SVladimir Kondratiev 11383d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 11393d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 11403d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 11413d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 11423d4bde15SVladimir Kondratiev 11433d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 11443d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 11453d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 11463d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 11473d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 11483d4bde15SVladimir Kondratiev } 11493d4bde15SVladimir Kondratiev 11503d4bde15SVladimir Kondratiev /** 11513d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 11523d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 11533d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 11543d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 11553d4bde15SVladimir Kondratiev * 11563d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 11573d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 11583d4bde15SVladimir Kondratiev */ 11593d4bde15SVladimir Kondratiev 11603d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 11613d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1162504937d4SKirshenbaum Erez int protocol; 1163504937d4SKirshenbaum Erez 1164504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1165504937d4SKirshenbaum Erez return 0; 1166504937d4SKirshenbaum Erez 1167df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1168df2d08eeSVladimir Kondratiev 1169504937d4SKirshenbaum Erez switch (skb->protocol) { 1170504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1171504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1172df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1173504937d4SKirshenbaum Erez break; 1174504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1175504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1176504937d4SKirshenbaum Erez break; 1177504937d4SKirshenbaum Erez default: 1178504937d4SKirshenbaum Erez return -EINVAL; 1179504937d4SKirshenbaum Erez } 1180504937d4SKirshenbaum Erez 1181504937d4SKirshenbaum Erez switch (protocol) { 1182504937d4SKirshenbaum Erez case IPPROTO_TCP: 1183504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1184504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1185504937d4SKirshenbaum Erez d->dma.d0 |= 1186504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1187504937d4SKirshenbaum Erez break; 1188504937d4SKirshenbaum Erez case IPPROTO_UDP: 1189504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1190504937d4SKirshenbaum Erez d->dma.d0 |= 1191504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1192504937d4SKirshenbaum Erez break; 1193504937d4SKirshenbaum Erez default: 1194504937d4SKirshenbaum Erez return -EINVAL; 1195504937d4SKirshenbaum Erez } 1196504937d4SKirshenbaum Erez 1197504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1198504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1199504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1200504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1201504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1202504937d4SKirshenbaum Erez 1203504937d4SKirshenbaum Erez return 0; 1204504937d4SKirshenbaum Erez } 1205504937d4SKirshenbaum Erez 12063d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 12073d4bde15SVladimir Kondratiev { 12083d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 12093d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 12103d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 12113d4bde15SVladimir Kondratiev } 12123d4bde15SVladimir Kondratiev 12133d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 12143d4bde15SVladimir Kondratiev { 12153d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 12163d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 12173d4bde15SVladimir Kondratiev } 12183d4bde15SVladimir Kondratiev 12193d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 12203d4bde15SVladimir Kondratiev struct sk_buff *skb) 12213d4bde15SVladimir Kondratiev { 12223d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 12233d4bde15SVladimir Kondratiev 12243d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 12253d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 12263d4bde15SVladimir Kondratiev *_first_desc = NULL; 12273d4bde15SVladimir Kondratiev 12283d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 12293d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 12303d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 12313d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 12323d4bde15SVladimir Kondratiev 12333d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 12343d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 12353d4bde15SVladimir Kondratiev 12363d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 12373d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 12383d4bde15SVladimir Kondratiev 12393d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 12403d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 12413d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 12423d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 12433d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 12443d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 12453d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 12463d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 12473d4bde15SVladimir Kondratiev uint i = swhead; 12483d4bde15SVladimir Kondratiev dma_addr_t pa; 12493d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 12503d4bde15SVladimir Kondratiev int rem_data = mss; 12513d4bde15SVladimir Kondratiev int lenmss; 12523d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 12533d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 12543d4bde15SVladimir Kondratiev bool is_ipv4; 12553d4bde15SVladimir Kondratiev int tcp_hdr_len; 12563d4bde15SVladimir Kondratiev int skb_net_hdr_len; 12573d4bde15SVladimir Kondratiev int gso_type; 1258e3d2ed94SHamad Kadmany int rc = -EINVAL; 12593d4bde15SVladimir Kondratiev 12603d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 12613d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 12623d4bde15SVladimir Kondratiev 12633d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 12643d4bde15SVladimir Kondratiev return -EINVAL; 12653d4bde15SVladimir Kondratiev 12663d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 12673d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 12683d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 12693d4bde15SVladimir Kondratiev * this is the initial check only. 12703d4bde15SVladimir Kondratiev */ 12713d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 12723d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 12733d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 12743d4bde15SVladimir Kondratiev vring_index, min_desc_required); 12753d4bde15SVladimir Kondratiev return -ENOMEM; 12763d4bde15SVladimir Kondratiev } 12773d4bde15SVladimir Kondratiev 12783d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 12793d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 12803d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 12813d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 12823d4bde15SVladimir Kondratiev 12833d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 12843d4bde15SVladimir Kondratiev switch (gso_type) { 12853d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 12863d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 12873d4bde15SVladimir Kondratiev * as required by the offloading doc 12883d4bde15SVladimir Kondratiev */ 12893d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 12903d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 12913d4bde15SVladimir Kondratiev is_ipv4 = true; 12923d4bde15SVladimir Kondratiev break; 12933d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 12943d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 12953d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 12963d4bde15SVladimir Kondratiev is_ipv4 = false; 12973d4bde15SVladimir Kondratiev break; 12983d4bde15SVladimir Kondratiev default: 12993d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 13003d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 13013d4bde15SVladimir Kondratiev */ 13023d4bde15SVladimir Kondratiev return -EINVAL; 13033d4bde15SVladimir Kondratiev } 13043d4bde15SVladimir Kondratiev 13053d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 13063d4bde15SVladimir Kondratiev return -EINVAL; 13073d4bde15SVladimir Kondratiev 13083d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 13093d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 13103d4bde15SVladimir Kondratiev */ 13113d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 13123d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 13133d4bde15SVladimir Kondratiev 13143d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 13153d4bde15SVladimir Kondratiev 13163d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 13173d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 13183d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 13193d4bde15SVladimir Kondratiev goto err_exit; 13203d4bde15SVladimir Kondratiev } 13213d4bde15SVladimir Kondratiev 13223d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 13233d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 13243d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 13253d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 13263d4bde15SVladimir Kondratiev 13273d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 13283d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 13293d4bde15SVladimir Kondratiev 13303d4bde15SVladimir Kondratiev descs_used++; 13313d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 13323d4bde15SVladimir Kondratiev 13333d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 13343d4bde15SVladimir Kondratiev if (headlen) { 13353d4bde15SVladimir Kondratiev len = headlen; 13363d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 13373d4bde15SVladimir Kondratiev len); 13383d4bde15SVladimir Kondratiev } else { 13393d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 13403d4bde15SVladimir Kondratiev len = frag->size; 13413d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 13423d4bde15SVladimir Kondratiev } 13433d4bde15SVladimir Kondratiev 13443d4bde15SVladimir Kondratiev while (len) { 13453d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 13463d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 13473d4bde15SVladimir Kondratiev len, rem_data, descs_used); 13483d4bde15SVladimir Kondratiev 13493d4bde15SVladimir Kondratiev if (descs_used == avail) { 1350e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1351e3d2ed94SHamad Kadmany rc = -ENOMEM; 1352e3d2ed94SHamad Kadmany goto mem_error; 13533d4bde15SVladimir Kondratiev } 13543d4bde15SVladimir Kondratiev 13553d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 13563d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 13573d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 13583d4bde15SVladimir Kondratiev 13593d4bde15SVladimir Kondratiev if (!headlen) { 13603d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 13613d4bde15SVladimir Kondratiev frag->size - len, lenmss, 13623d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13633d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 13643d4bde15SVladimir Kondratiev } else { 13653d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 13663d4bde15SVladimir Kondratiev skb->data + 13673d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 13683d4bde15SVladimir Kondratiev lenmss, 13693d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 13703d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 13713d4bde15SVladimir Kondratiev headlen -= lenmss; 13723d4bde15SVladimir Kondratiev } 13733d4bde15SVladimir Kondratiev 1374e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1375e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1376e3d2ed94SHamad Kadmany goto mem_error; 1377e3d2ed94SHamad Kadmany } 13783d4bde15SVladimir Kondratiev 13793d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 13803d4bde15SVladimir Kondratiev 13813d4bde15SVladimir Kondratiev if (!_first_desc) { 13823d4bde15SVladimir Kondratiev _first_desc = _desc; 13833d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 13843d4bde15SVladimir Kondratiev d = first_desc; 13853d4bde15SVladimir Kondratiev } else { 13863d4bde15SVladimir Kondratiev d = &desc_mem; 13873d4bde15SVladimir Kondratiev } 13883d4bde15SVladimir Kondratiev 13893d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 13903d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 13913d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 13923d4bde15SVladimir Kondratiev skb_net_hdr_len); 13933d4bde15SVladimir Kondratiev 13943d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 13953d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 13963d4bde15SVladimir Kondratiev 13973d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 13983d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 13993d4bde15SVladimir Kondratiev len -= lenmss; 14003d4bde15SVladimir Kondratiev rem_data -= lenmss; 14013d4bde15SVladimir Kondratiev 14023d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14033d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 14043d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 14053d4bde15SVladimir Kondratiev 14063d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 14073d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 14083d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 14093d4bde15SVladimir Kondratiev /* first segment include hdr desc for 14103d4bde15SVladimir Kondratiev * release 14113d4bde15SVladimir Kondratiev */ 14123d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 14133d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 14143d4bde15SVladimir Kondratiev sg_desc_cnt + 14153d4bde15SVladimir Kondratiev 1); 14163d4bde15SVladimir Kondratiev hdr_compensation_need = false; 14173d4bde15SVladimir Kondratiev } else { 14183d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 14193d4bde15SVladimir Kondratiev sg_desc_cnt); 14203d4bde15SVladimir Kondratiev } 14213d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 14223d4bde15SVladimir Kondratiev 14233d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 14243d4bde15SVladimir Kondratiev 14253d4bde15SVladimir Kondratiev /* first descriptor may also be the last 14263d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 14273d4bde15SVladimir Kondratiev * it twice 14283d4bde15SVladimir Kondratiev */ 14293d4bde15SVladimir Kondratiev if (first_desc != d) 14303d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 14313d4bde15SVladimir Kondratiev 14323d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 14333d4bde15SVladimir Kondratiev * of this TS processing 14343d4bde15SVladimir Kondratiev */ 14353d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 14363d4bde15SVladimir Kondratiev *_desc = *d; 14373d4bde15SVladimir Kondratiev 14383d4bde15SVladimir Kondratiev rem_data = mss; 14393d4bde15SVladimir Kondratiev _first_desc = NULL; 14403d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 14413d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 14423d4bde15SVladimir Kondratiev *_desc = *d; 14433d4bde15SVladimir Kondratiev } 14443d4bde15SVladimir Kondratiev } 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 14473d4bde15SVladimir Kondratiev * in this case d pointer is invalid 14483d4bde15SVladimir Kondratiev */ 14493d4bde15SVladimir Kondratiev if (_first_desc == _desc) 14503d4bde15SVladimir Kondratiev d = first_desc; 14513d4bde15SVladimir Kondratiev 14523d4bde15SVladimir Kondratiev /* Last data descriptor */ 14533d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 14543d4bde15SVladimir Kondratiev *_desc = *d; 14553d4bde15SVladimir Kondratiev 14563d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 14573d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 14583d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 14593d4bde15SVladimir Kondratiev 14603d4bde15SVladimir Kondratiev /* hold reference to skb 14613d4bde15SVladimir Kondratiev * to prevent skb release before accounting 14623d4bde15SVladimir Kondratiev * in case of immediate "tx done" 14633d4bde15SVladimir Kondratiev */ 14643d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 14653d4bde15SVladimir Kondratiev 14663d4bde15SVladimir Kondratiev /* performance monitoring */ 14673d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 14683d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 14693d4bde15SVladimir Kondratiev used, used + descs_used)) { 14703d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 14713d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 14723d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 14733d4bde15SVladimir Kondratiev } 14743d4bde15SVladimir Kondratiev 14753d4bde15SVladimir Kondratiev /* advance swhead */ 14763d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1477e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 14783d4bde15SVladimir Kondratiev 14793d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 14803d4bde15SVladimir Kondratiev * committing them to HW 14813d4bde15SVladimir Kondratiev */ 14823d4bde15SVladimir Kondratiev wmb(); 14833d4bde15SVladimir Kondratiev 1484b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 14853d4bde15SVladimir Kondratiev return 0; 14863d4bde15SVladimir Kondratiev 1487e3d2ed94SHamad Kadmany mem_error: 14883d4bde15SVladimir Kondratiev while (descs_used > 0) { 14893d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 14903d4bde15SVladimir Kondratiev 14913d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14923d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 14933d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14943d4bde15SVladimir Kondratiev *d = *_desc; 14953d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 14963d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 14973d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 14983d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 14993d4bde15SVladimir Kondratiev descs_used--; 15003d4bde15SVladimir Kondratiev } 15013d4bde15SVladimir Kondratiev err_exit: 1502e3d2ed94SHamad Kadmany return rc; 15033d4bde15SVladimir Kondratiev } 15043d4bde15SVladimir Kondratiev 15055933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 15062be7d22fSVladimir Kondratiev struct sk_buff *skb) 15072be7d22fSVladimir Kondratiev { 15082be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 150968ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 151068ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 15112be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 15122be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 15132be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1514504937d4SKirshenbaum Erez uint f = 0; 15152be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 15167c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 15172be7d22fSVladimir Kondratiev uint i = swhead; 15182be7d22fSVladimir Kondratiev dma_addr_t pa; 15190436fd9aSVladimir Shulman int used; 152041d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 152141d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 15222be7d22fSVladimir Kondratiev 15233d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 15243d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 15252be7d22fSVladimir Kondratiev 15265933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 15275933a06dSVladimir Kondratiev return -EINVAL; 15285933a06dSVladimir Kondratiev 152933c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 153070801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 15315b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 15325b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 15332be7d22fSVladimir Kondratiev return -ENOMEM; 15342be7d22fSVladimir Kondratiev } 15358fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 15362be7d22fSVladimir Kondratiev 15378fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 15382be7d22fSVladimir Kondratiev 15395b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 15405b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 15417743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 15422be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 15432be7d22fSVladimir Kondratiev 15442be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 15452be7d22fSVladimir Kondratiev return -EINVAL; 15462232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15472be7d22fSVladimir Kondratiev /* 1-st segment */ 154841d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 154941d6b093SVladimir Kondratiev if (unlikely(mcast)) { 155041d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1551230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 155241d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 155341d6b093SVladimir Kondratiev } 1554504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 15553d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 15565b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1557504937d4SKirshenbaum Erez vring_index); 1558504937d4SKirshenbaum Erez goto dma_error; 1559504937d4SKirshenbaum Erez } 1560504937d4SKirshenbaum Erez 1561c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 15623d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 156368ada71eSVladimir Kondratiev 15642be7d22fSVladimir Kondratiev /* middle segments */ 1565504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 15662be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 15672be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 15682be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 15698fe59627SVladimir Kondratiev 1570e59d16c0SVladimir Kondratiev *_d = *d; 15715b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15725b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15735b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15742be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 15758fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 15762be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 15772be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1578e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1579e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1580e3d2ed94SHamad Kadmany vring_index); 15812be7d22fSVladimir Kondratiev goto dma_error; 1582e3d2ed94SHamad Kadmany } 15832232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 158499b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1585c236658fSVladimir Kondratiev /* no need to check return code - 1586c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1587c236658fSVladimir Kondratiev * it will succeed here too 1588c236658fSVladimir Kondratiev */ 15893d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 15902be7d22fSVladimir Kondratiev } 15912be7d22fSVladimir Kondratiev /* for the last seg only */ 15922be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1593668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 15942be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 159568ada71eSVladimir Kondratiev *_d = *d; 15965b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 15975b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 15985b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 15992be7d22fSVladimir Kondratiev 16006cdadd4dSVladimir Kondratiev /* hold reference to skb 16016cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 16026cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 16036cdadd4dSVladimir Kondratiev */ 16046cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16056cdadd4dSVladimir Kondratiev 16060436fd9aSVladimir Shulman /* performance monitoring */ 16070436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 16080436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 16090436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 16107c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16110436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16120436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 16130436fd9aSVladimir Shulman } 16147c0acf86SVladimir Kondratiev 16152be7d22fSVladimir Kondratiev /* advance swhead */ 16162be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 16175b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 16185b29c573SVladimir Kondratiev vring->swhead); 161998658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 16203d4bde15SVladimir Kondratiev 16213d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16223d4bde15SVladimir Kondratiev * committing them to HW 16233d4bde15SVladimir Kondratiev */ 16243d4bde15SVladimir Kondratiev wmb(); 16253d4bde15SVladimir Kondratiev 1626b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16272be7d22fSVladimir Kondratiev 16282be7d22fSVladimir Kondratiev return 0; 16292be7d22fSVladimir Kondratiev dma_error: 16302be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1631c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1632c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1633c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 16347e594444SVladimir Kondratiev 16352be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1636c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 16378fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 163868ada71eSVladimir Kondratiev *d = *_d; 163968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 16402232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1641f88f113aSVladimir Kondratiev 1642f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16432be7d22fSVladimir Kondratiev } 16442be7d22fSVladimir Kondratiev 16452be7d22fSVladimir Kondratiev return -EINVAL; 16462be7d22fSVladimir Kondratiev } 16472be7d22fSVladimir Kondratiev 16485933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 16495933a06dSVladimir Kondratiev struct sk_buff *skb) 16505933a06dSVladimir Kondratiev { 16515933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 16525933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 16535933a06dSVladimir Kondratiev int rc; 16545933a06dSVladimir Kondratiev 16555933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 16563d4bde15SVladimir Kondratiev 16573d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 16583d4bde15SVladimir Kondratiev (wil, vring, skb); 16593d4bde15SVladimir Kondratiev 16605933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 16613d4bde15SVladimir Kondratiev 16625933a06dSVladimir Kondratiev return rc; 16635933a06dSVladimir Kondratiev } 16645933a06dSVladimir Kondratiev 16652be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 16662be7d22fSVladimir Kondratiev { 16672be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 16683df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 166941d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 16702be7d22fSVladimir Kondratiev struct vring *vring; 1671aa27deaaSVladimir Kondratiev static bool pr_once_fw; 16722be7d22fSVladimir Kondratiev int rc; 16732be7d22fSVladimir Kondratiev 16747743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 167533c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1676aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 16772be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1678aa27deaaSVladimir Kondratiev pr_once_fw = true; 1679aa27deaaSVladimir Kondratiev } 16802be7d22fSVladimir Kondratiev goto drop; 16812be7d22fSVladimir Kondratiev } 168233c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1683a3dcbae2SVladimir Kondratiev wil_err_ratelimited(wil, "FW not connected\n"); 16842be7d22fSVladimir Kondratiev goto drop; 16852be7d22fSVladimir Kondratiev } 168633c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 16872be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 16882be7d22fSVladimir Kondratiev goto drop; 16892be7d22fSVladimir Kondratiev } 1690aa27deaaSVladimir Kondratiev pr_once_fw = false; 1691d58db4e4SVladimir Kondratiev 16922be7d22fSVladimir Kondratiev /* find vring */ 169354ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 169454ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 169554ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 169654ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 169741d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 169841d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 169954ed90a8SVladimir Kondratiev } 170033c477fdSVladimir Kondratiev if (unlikely(!vring)) { 17015aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 17022be7d22fSVladimir Kondratiev goto drop; 17032be7d22fSVladimir Kondratiev } 17042be7d22fSVladimir Kondratiev /* set up vring entry */ 17052be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1706d58db4e4SVladimir Kondratiev 17072232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 170833c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 17092232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 171055f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 171155f8f680SVladimir Kondratiev } 17122232abd5SVladimir Kondratiev 17132be7d22fSVladimir Kondratiev switch (rc) { 17142be7d22fSVladimir Kondratiev case 0: 1715795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 17162be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 17172be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 17182be7d22fSVladimir Kondratiev case -ENOMEM: 17192be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 17202be7d22fSVladimir Kondratiev default: 1721afda8bb5SVladimir Kondratiev break; /* goto drop; */ 17222be7d22fSVladimir Kondratiev } 17232be7d22fSVladimir Kondratiev drop: 17242be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 17252be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 17262be7d22fSVladimir Kondratiev 17272be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 17282be7d22fSVladimir Kondratiev } 17292be7d22fSVladimir Kondratiev 1730713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1731713c8a29SVladimir Kondratiev { 1732713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1733713c8a29SVladimir Kondratiev 1734713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1735713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1736713c8a29SVladimir Kondratiev } 1737713c8a29SVladimir Kondratiev 1738713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1739713c8a29SVladimir Kondratiev { 1740713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1741713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1742713c8a29SVladimir Kondratiev else 1743713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1744713c8a29SVladimir Kondratiev } 1745713c8a29SVladimir Kondratiev 17462be7d22fSVladimir Kondratiev /** 17472be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 17482be7d22fSVladimir Kondratiev * 1749e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1750e0287c4aSVladimir Kondratiev * 17512be7d22fSVladimir Kondratiev * Safe to call from IRQ 17522be7d22fSVladimir Kondratiev */ 1753e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 17542be7d22fSVladimir Kondratiev { 1755795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 17562be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17572be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1758097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1759e0287c4aSVladimir Kondratiev int done = 0; 1760c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 176141d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1762c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17630436fd9aSVladimir Shulman int used_before_complete; 17640436fd9aSVladimir Shulman int used_new; 17652be7d22fSVladimir Kondratiev 176633c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 17672be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1768e0287c4aSVladimir Kondratiev return 0; 17692be7d22fSVladimir Kondratiev } 17702be7d22fSVladimir Kondratiev 177133c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1772097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1773097638a0SVladimir Kondratiev return 0; 1774097638a0SVladimir Kondratiev } 1775097638a0SVladimir Kondratiev 17767743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 17772be7d22fSVladimir Kondratiev 17780436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 17790436fd9aSVladimir Shulman 178041d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 178141d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 178241d6b093SVladimir Kondratiev 17832be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1784c236658fSVladimir Kondratiev int new_swtail; 1785c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1786c236658fSVladimir Kondratiev /** 1787c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 17883d4bde15SVladimir Kondratiev * last fragment. look for it. 17893d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1790c236658fSVladimir Kondratiev */ 1791c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1792c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1793c236658fSVladimir Kondratiev 1794c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 179533c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1796c236658fSVladimir Kondratiev break; 1797c236658fSVladimir Kondratiev 1798c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1799c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 18004de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 18017e594444SVladimir Kondratiev u16 dmalen; 180276dfa4b7SVladimir Kondratiev struct sk_buff *skb; 180376dfa4b7SVladimir Kondratiev 180476dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 180576dfa4b7SVladimir Kondratiev skb = ctx->skb; 1806c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 18074de41befSVladimir Kondratiev 180868ada71eSVladimir Kondratiev *d = *_d; 18094de41befSVladimir Kondratiev 18107e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 181198658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 181298658095SVladimir Kondratiev d->dma.error); 18137743882dSVladimir Kondratiev wil_dbg_txrx(wil, 18145b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 18155b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 18165b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 18175b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 18182be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 18192be7d22fSVladimir Kondratiev 18202232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1821f88f113aSVladimir Kondratiev 18222be7d22fSVladimir Kondratiev if (skb) { 182333c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1824795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1825795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 182641d6b093SVladimir Kondratiev if (stats) { 182741d6b093SVladimir Kondratiev stats->tx_packets++; 1828c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 182941d6b093SVladimir Kondratiev } 1830795ce734SVladimir Kondratiev } else { 1831795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 183241d6b093SVladimir Kondratiev if (stats) 1833c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1834795ce734SVladimir Kondratiev } 1835713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 18362be7d22fSVladimir Kondratiev } 1837f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1838c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 183903269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 184003269c65SVladimir Kondratiev * so hardware will not try to process this desc., 184103269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 184203269c65SVladimir Kondratiev */ 18432be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1844e0287c4aSVladimir Kondratiev done++; 18452be7d22fSVladimir Kondratiev } 1846c236658fSVladimir Kondratiev } 184767c3e1b4SVladimir Kondratiev 18480436fd9aSVladimir Shulman /* performance monitoring */ 18490436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 18500436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 18510436fd9aSVladimir Shulman used_new, used_before_complete)) { 18520436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 18530436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 18547c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 18557c0acf86SVladimir Kondratiev } 185667c3e1b4SVladimir Kondratiev 185755f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 185855f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 18592be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 186055f8f680SVladimir Kondratiev } 1861e0287c4aSVladimir Kondratiev 1862e0287c4aSVladimir Kondratiev return done; 18632be7d22fSVladimir Kondratiev } 1864