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 55258527421SVladimir Kondratiev /** 55358527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 55458527421SVladimir Kondratiev * @cs: One area of memory 55558527421SVladimir Kondratiev * @ct: Another area of memory 55658527421SVladimir Kondratiev * @count: The size of the area. 55758527421SVladimir Kondratiev * 55858527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 55958527421SVladimir Kondratiev * with minimal modifications 56058527421SVladimir Kondratiev */ 56158527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 56258527421SVladimir Kondratiev { 56358527421SVladimir Kondratiev const unsigned char *su1, *su2; 56458527421SVladimir Kondratiev int res = 0; 56558527421SVladimir Kondratiev 56658527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 56758527421SVladimir Kondratiev --su1, --su2, count--) { 56858527421SVladimir Kondratiev res = *su1 - *su2; 56958527421SVladimir Kondratiev if (res) 57058527421SVladimir Kondratiev break; 57158527421SVladimir Kondratiev } 57258527421SVladimir Kondratiev return res; 57358527421SVladimir Kondratiev } 57458527421SVladimir Kondratiev 57558527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 57658527421SVladimir Kondratiev { 57758527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 57858527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 57958527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 58058527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 58158527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 58258527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 58358527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 58458527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 58558527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 58658527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 58758527421SVladimir Kondratiev 58858527421SVladimir Kondratiev if (!cc->key_set) { 58958527421SVladimir Kondratiev wil_err_ratelimited(wil, 59058527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 59158527421SVladimir Kondratiev cid, tid, mc, key_id); 59258527421SVladimir Kondratiev return -EINVAL; 59358527421SVladimir Kondratiev } 59458527421SVladimir Kondratiev 59558527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 59658527421SVladimir Kondratiev wil_err_ratelimited(wil, 59758527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 59858527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 59958527421SVladimir Kondratiev return -EINVAL; 60058527421SVladimir Kondratiev } 60158527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 60258527421SVladimir Kondratiev 60358527421SVladimir Kondratiev return 0; 60458527421SVladimir Kondratiev } 60558527421SVladimir Kondratiev 6062be7d22fSVladimir Kondratiev /* 6072be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 608e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6092be7d22fSVladimir Kondratiev */ 610b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6112be7d22fSVladimir Kondratiev { 612c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 613c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 614c42da999SVladimir Kondratiev struct wireless_dev *wdev = wil_to_wdev(wil); 6152be7d22fSVladimir Kondratiev unsigned int len = skb->len; 616c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 61741d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 61858527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 619c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 620c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 621c42da999SVladimir Kondratiev * is not suitable, need to look at data 622c42da999SVladimir Kondratiev */ 623c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 624c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 625c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 626c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 627c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 628c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 629c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 630c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 631c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 632c42da999SVladimir Kondratiev }; 6332be7d22fSVladimir Kondratiev 6340553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 6350553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 6360553640dSVladimir Shulman * set hash to any non-zero value to activate rps 6370553640dSVladimir Shulman * mechanism, core will be chosen according 6380553640dSVladimir Shulman * to user-level rps configuration. 6390553640dSVladimir Shulman */ 6400553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 6410553640dSVladimir Shulman 642241804cbSVladimir Kondratiev skb_orphan(skb); 643241804cbSVladimir Kondratiev 64458527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 64558527421SVladimir Kondratiev rc = GRO_DROP; 64658527421SVladimir Kondratiev dev_kfree_skb(skb); 64758527421SVladimir Kondratiev stats->rx_replay++; 64858527421SVladimir Kondratiev goto stats; 64958527421SVladimir Kondratiev } 65058527421SVladimir Kondratiev 65102beaf1aSVladimir Kondratiev if (wdev->iftype == NL80211_IFTYPE_AP && !wil->ap_isolate) { 652c42da999SVladimir Kondratiev if (mcast) { 653c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 654c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 655c42da999SVladimir Kondratiev */ 656c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 657c42da999SVladimir Kondratiev } else { 658c42da999SVladimir Kondratiev int xmit_cid = wil_find_cid(wil, eth->h_dest); 6592be7d22fSVladimir Kondratiev 660c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 661c42da999SVladimir Kondratiev /* The destination station is associated to 662c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 663c42da999SVladimir Kondratiev * directly to it and do not pass it to local 664c42da999SVladimir Kondratiev * net stack. 665c42da999SVladimir Kondratiev */ 666c42da999SVladimir Kondratiev xmit_skb = skb; 667c42da999SVladimir Kondratiev skb = NULL; 668c42da999SVladimir Kondratiev } 669c42da999SVladimir Kondratiev } 670c42da999SVladimir Kondratiev } 671c42da999SVladimir Kondratiev if (xmit_skb) { 672c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 673c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 674c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 675c42da999SVladimir Kondratiev */ 676c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 677c42da999SVladimir Kondratiev xmit_skb->priority += 256; 678c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 679c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 680c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 681c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 682c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 683c42da999SVladimir Kondratiev } 684c42da999SVladimir Kondratiev 685c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 686c42da999SVladimir Kondratiev 687c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 688c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 689c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 690c42da999SVladimir Kondratiev len, gro_res_str[rc]); 691c42da999SVladimir Kondratiev } 69258527421SVladimir Kondratiev stats: 693c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 694b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 695b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 696b5998e6aSVladimir Kondratiev stats->rx_dropped++; 697b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 698b5998e6aSVladimir Kondratiev } else { 6992be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 700c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7012be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 702c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 703c42da999SVladimir Kondratiev if (mcast) 704c42da999SVladimir Kondratiev ndev->stats.multicast++; 705194b482bSVladimir Kondratiev } 7062be7d22fSVladimir Kondratiev } 7072be7d22fSVladimir Kondratiev 7082be7d22fSVladimir Kondratiev /** 7092be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7102be7d22fSVladimir Kondratiev * 711e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7122be7d22fSVladimir Kondratiev */ 713e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7142be7d22fSVladimir Kondratiev { 7152be7d22fSVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 7162be7d22fSVladimir Kondratiev struct vring *v = &wil->vring_rx; 7172be7d22fSVladimir Kondratiev struct sk_buff *skb; 7182be7d22fSVladimir Kondratiev 71933c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7202be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7212be7d22fSVladimir Kondratiev return; 7222be7d22fSVladimir Kondratiev } 7237743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 724e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 725e0287c4aSVladimir Kondratiev (*quota)--; 7262be7d22fSVladimir Kondratiev 7272be7d22fSVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_MONITOR) { 7282be7d22fSVladimir Kondratiev skb->dev = ndev; 7292be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7302be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7312be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7322be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 733b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7342be7d22fSVladimir Kondratiev } else { 735b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 7362be7d22fSVladimir Kondratiev } 7372be7d22fSVladimir Kondratiev } 7382be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 7392be7d22fSVladimir Kondratiev } 7402be7d22fSVladimir Kondratiev 741d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 7422be7d22fSVladimir Kondratiev { 7432be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7442be7d22fSVladimir Kondratiev int rc; 7452be7d22fSVladimir Kondratiev 7469cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 7479cf10d62SVladimir Kondratiev 7488bf6adb9SVladimir Kondratiev if (vring->va) { 7498bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 7508bf6adb9SVladimir Kondratiev return -EINVAL; 7518bf6adb9SVladimir Kondratiev } 7528bf6adb9SVladimir Kondratiev 753d3762b40SVladimir Kondratiev vring->size = size; 7542be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 7552be7d22fSVladimir Kondratiev if (rc) 7562be7d22fSVladimir Kondratiev return rc; 7572be7d22fSVladimir Kondratiev 75847e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 7592be7d22fSVladimir Kondratiev if (rc) 7602be7d22fSVladimir Kondratiev goto err_free; 7612be7d22fSVladimir Kondratiev 7622be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 7632be7d22fSVladimir Kondratiev if (rc) 7642be7d22fSVladimir Kondratiev goto err_free; 7652be7d22fSVladimir Kondratiev 7662be7d22fSVladimir Kondratiev return 0; 7672be7d22fSVladimir Kondratiev err_free: 7682be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7692be7d22fSVladimir Kondratiev 7702be7d22fSVladimir Kondratiev return rc; 7712be7d22fSVladimir Kondratiev } 7722be7d22fSVladimir Kondratiev 7732be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 7742be7d22fSVladimir Kondratiev { 7752be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_rx; 7762be7d22fSVladimir Kondratiev 7779cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s()\n", __func__); 7789cf10d62SVladimir Kondratiev 7792acb4220SVladimir Kondratiev if (vring->va) 7802be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 7812be7d22fSVladimir Kondratiev } 7822be7d22fSVladimir Kondratiev 783875e9439SMaya Erez static inline void wil_tx_data_init(struct vring_tx_data *txdata) 784875e9439SMaya Erez { 785875e9439SMaya Erez spin_lock_bh(&txdata->lock); 786875e9439SMaya Erez txdata->dot1x_open = 0; 787875e9439SMaya Erez txdata->enabled = 0; 788875e9439SMaya Erez txdata->idle = 0; 789875e9439SMaya Erez txdata->last_idle = 0; 790875e9439SMaya Erez txdata->begin = 0; 791875e9439SMaya Erez txdata->agg_wsize = 0; 792875e9439SMaya Erez txdata->agg_timeout = 0; 793875e9439SMaya Erez txdata->agg_amsdu = 0; 794875e9439SMaya Erez txdata->addba_in_progress = false; 795875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 796875e9439SMaya Erez } 797875e9439SMaya Erez 7982be7d22fSVladimir Kondratiev int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size, 7992be7d22fSVladimir Kondratiev int cid, int tid) 8002be7d22fSVladimir Kondratiev { 8012be7d22fSVladimir Kondratiev int rc; 8022be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 8032be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 8042be7d22fSVladimir Kondratiev .vring_cfg = { 8052be7d22fSVladimir Kondratiev .tx_sw_ring = { 8069a06bec9SVladimir Kondratiev .max_mpdu_size = 807c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 808b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 8092be7d22fSVladimir Kondratiev }, 8102be7d22fSVladimir Kondratiev .ringid = id, 811a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 8122be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 8132be7d22fSVladimir Kondratiev .mac_ctrl = 0, 8142be7d22fSVladimir Kondratiev .to_resolution = 0, 8153277213fSVladimir Kondratiev .agg_max_wsize = 0, 8162be7d22fSVladimir Kondratiev .schd_params = { 8172be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 8182be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 8192be7d22fSVladimir Kondratiev }, 8202be7d22fSVladimir Kondratiev }, 8212be7d22fSVladimir Kondratiev }; 8222be7d22fSVladimir Kondratiev struct { 823b874ddecSLior David struct wmi_cmd_hdr wmi; 8242be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 8252be7d22fSVladimir Kondratiev } __packed reply; 8262be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 827097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 8282be7d22fSVladimir Kondratiev 829e0106adaSVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 830e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 8319b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 8329cf10d62SVladimir Kondratiev 8332be7d22fSVladimir Kondratiev if (vring->va) { 8342be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 8352be7d22fSVladimir Kondratiev rc = -EINVAL; 8362be7d22fSVladimir Kondratiev goto out; 8372be7d22fSVladimir Kondratiev } 8382be7d22fSVladimir Kondratiev 839875e9439SMaya Erez wil_tx_data_init(txdata); 8402be7d22fSVladimir Kondratiev vring->size = size; 8412be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8422be7d22fSVladimir Kondratiev if (rc) 8432be7d22fSVladimir Kondratiev goto out; 8442be7d22fSVladimir Kondratiev 84593ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][0] = cid; 84693ae6d49SVladimir Kondratiev wil->vring2cid_tid[id][1] = tid; 84793ae6d49SVladimir Kondratiev 8482be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 8492be7d22fSVladimir Kondratiev 850230d8442SVladimir Kondratiev if (!wil->privacy) 851230d8442SVladimir Kondratiev txdata->dot1x_open = true; 8522be7d22fSVladimir Kondratiev rc = wmi_call(wil, WMI_VRING_CFG_CMDID, &cmd, sizeof(cmd), 8532be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 8542be7d22fSVladimir Kondratiev if (rc) 8552be7d22fSVladimir Kondratiev goto out_free; 8562be7d22fSVladimir Kondratiev 857b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 8582be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 8592be7d22fSVladimir Kondratiev reply.cmd.status); 860c331997bSVladimir Kondratiev rc = -EINVAL; 8612be7d22fSVladimir Kondratiev goto out_free; 8622be7d22fSVladimir Kondratiev } 8632be7d22fSVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 8642be7d22fSVladimir Kondratiev 865097638a0SVladimir Kondratiev txdata->enabled = 1; 866230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 8673a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 868097638a0SVladimir Kondratiev 8692be7d22fSVladimir Kondratiev return 0; 8702be7d22fSVladimir Kondratiev out_free: 871875e9439SMaya Erez spin_lock_bh(&txdata->lock); 872230d8442SVladimir Kondratiev txdata->dot1x_open = false; 873230d8442SVladimir Kondratiev txdata->enabled = 0; 874875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 8752be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 8760916d9f2SMaya Erez wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; 8770916d9f2SMaya Erez wil->vring2cid_tid[id][1] = 0; 8780916d9f2SMaya Erez 8792be7d22fSVladimir Kondratiev out: 8802be7d22fSVladimir Kondratiev 8812be7d22fSVladimir Kondratiev return rc; 8822be7d22fSVladimir Kondratiev } 8832be7d22fSVladimir Kondratiev 88441d6b093SVladimir Kondratiev int wil_vring_init_bcast(struct wil6210_priv *wil, int id, int size) 88541d6b093SVladimir Kondratiev { 88641d6b093SVladimir Kondratiev int rc; 88741d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 88841d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 88941d6b093SVladimir Kondratiev .vring_cfg = { 89041d6b093SVladimir Kondratiev .tx_sw_ring = { 89141d6b093SVladimir Kondratiev .max_mpdu_size = 89241d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 89341d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 89441d6b093SVladimir Kondratiev }, 89541d6b093SVladimir Kondratiev .ringid = id, 89641d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 89741d6b093SVladimir Kondratiev }, 89841d6b093SVladimir Kondratiev }; 89941d6b093SVladimir Kondratiev struct { 900b874ddecSLior David struct wmi_cmd_hdr wmi; 90141d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 90241d6b093SVladimir Kondratiev } __packed reply; 90341d6b093SVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 90441d6b093SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 90541d6b093SVladimir Kondratiev 90641d6b093SVladimir Kondratiev wil_dbg_misc(wil, "%s() max_mpdu_size %d\n", __func__, 90741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9089b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 90941d6b093SVladimir Kondratiev 91041d6b093SVladimir Kondratiev if (vring->va) { 91141d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 91241d6b093SVladimir Kondratiev rc = -EINVAL; 91341d6b093SVladimir Kondratiev goto out; 91441d6b093SVladimir Kondratiev } 91541d6b093SVladimir Kondratiev 916875e9439SMaya Erez wil_tx_data_init(txdata); 91741d6b093SVladimir Kondratiev vring->size = size; 91841d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 91941d6b093SVladimir Kondratiev if (rc) 92041d6b093SVladimir Kondratiev goto out; 92141d6b093SVladimir Kondratiev 92241d6b093SVladimir Kondratiev wil->vring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 92341d6b093SVladimir Kondratiev wil->vring2cid_tid[id][1] = 0; /* TID */ 92441d6b093SVladimir Kondratiev 92541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 92641d6b093SVladimir Kondratiev 927230d8442SVladimir Kondratiev if (!wil->privacy) 928230d8442SVladimir Kondratiev txdata->dot1x_open = true; 92941d6b093SVladimir Kondratiev rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, &cmd, sizeof(cmd), 93041d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 93141d6b093SVladimir Kondratiev if (rc) 93241d6b093SVladimir Kondratiev goto out_free; 93341d6b093SVladimir Kondratiev 93441d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 93541d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 93641d6b093SVladimir Kondratiev reply.cmd.status); 93741d6b093SVladimir Kondratiev rc = -EINVAL; 93841d6b093SVladimir Kondratiev goto out_free; 93941d6b093SVladimir Kondratiev } 94041d6b093SVladimir Kondratiev vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 94141d6b093SVladimir Kondratiev 94241d6b093SVladimir Kondratiev txdata->enabled = 1; 94341d6b093SVladimir Kondratiev 94441d6b093SVladimir Kondratiev return 0; 94541d6b093SVladimir Kondratiev out_free: 946875e9439SMaya Erez spin_lock_bh(&txdata->lock); 947230d8442SVladimir Kondratiev txdata->enabled = 0; 948230d8442SVladimir Kondratiev txdata->dot1x_open = false; 949875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 95041d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 95141d6b093SVladimir Kondratiev out: 95241d6b093SVladimir Kondratiev 95341d6b093SVladimir Kondratiev return rc; 95441d6b093SVladimir Kondratiev } 95541d6b093SVladimir Kondratiev 9562be7d22fSVladimir Kondratiev void wil_vring_fini_tx(struct wil6210_priv *wil, int id) 9572be7d22fSVladimir Kondratiev { 9582be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[id]; 9593a124ed6SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[id]; 9602be7d22fSVladimir Kondratiev 9619b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 962097638a0SVladimir Kondratiev 9632be7d22fSVladimir Kondratiev if (!vring->va) 9642be7d22fSVladimir Kondratiev return; 9652be7d22fSVladimir Kondratiev 9669cf10d62SVladimir Kondratiev wil_dbg_misc(wil, "%s() id=%d\n", __func__, id); 9679cf10d62SVladimir Kondratiev 9685933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 969230d8442SVladimir Kondratiev txdata->dot1x_open = false; 9705933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 9715933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 972097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 9739419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 974097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 975097638a0SVladimir Kondratiev 9762be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 9772be7d22fSVladimir Kondratiev } 9782be7d22fSVladimir Kondratiev 97941d6b093SVladimir Kondratiev static struct vring *wil_find_tx_ucast(struct wil6210_priv *wil, 9802be7d22fSVladimir Kondratiev struct sk_buff *skb) 9812be7d22fSVladimir Kondratiev { 9823df2cd36SVladimir Kondratiev int i; 9833df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 9843df2cd36SVladimir Kondratiev int cid = wil_find_cid(wil, eth->h_dest); 9852be7d22fSVladimir Kondratiev 9863df2cd36SVladimir Kondratiev if (cid < 0) 9873df2cd36SVladimir Kondratiev return NULL; 9883df2cd36SVladimir Kondratiev 9893df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 9903df2cd36SVladimir Kondratiev for (i = 0; i < ARRAY_SIZE(wil->vring2cid_tid); i++) { 991230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 992230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 993230d8442SVladimir Kondratiev continue; 9943df2cd36SVladimir Kondratiev if (wil->vring2cid_tid[i][0] == cid) { 9953df2cd36SVladimir Kondratiev struct vring *v = &wil->vring_tx[i]; 996b729aaf0SMaya Erez struct vring_tx_data *txdata = &wil->vring_tx_data[i]; 9978fe59627SVladimir Kondratiev 9983df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "%s(%pM) -> [%d]\n", 9993df2cd36SVladimir Kondratiev __func__, eth->h_dest, i); 1000b729aaf0SMaya Erez if (v->va && txdata->enabled) { 10012be7d22fSVladimir Kondratiev return v; 10023df2cd36SVladimir Kondratiev } else { 10033df2cd36SVladimir Kondratiev wil_dbg_txrx(wil, "vring[%d] not valid\n", i); 10043df2cd36SVladimir Kondratiev return NULL; 10053df2cd36SVladimir Kondratiev } 10063df2cd36SVladimir Kondratiev } 10073df2cd36SVladimir Kondratiev } 10082be7d22fSVladimir Kondratiev 10092be7d22fSVladimir Kondratiev return NULL; 10102be7d22fSVladimir Kondratiev } 10112be7d22fSVladimir Kondratiev 1012fb3cac57SVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 1013fb3cac57SVladimir Kondratiev struct sk_buff *skb); 101454ed90a8SVladimir Kondratiev 101554ed90a8SVladimir Kondratiev static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil, 101654ed90a8SVladimir Kondratiev struct sk_buff *skb) 101754ed90a8SVladimir Kondratiev { 101854ed90a8SVladimir Kondratiev struct vring *v; 101954ed90a8SVladimir Kondratiev int i; 102054ed90a8SVladimir Kondratiev u8 cid; 1021b729aaf0SMaya Erez struct vring_tx_data *txdata; 102254ed90a8SVladimir Kondratiev 102354ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 102454ed90a8SVladimir Kondratiev * for the AP we connected to. 1025230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 102654ed90a8SVladimir Kondratiev */ 102754ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 102854ed90a8SVladimir Kondratiev v = &wil->vring_tx[i]; 1029b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1030b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 103154ed90a8SVladimir Kondratiev continue; 103254ed90a8SVladimir Kondratiev 103354ed90a8SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 103441d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 103541d6b093SVladimir Kondratiev continue; 103641d6b093SVladimir Kondratiev 1037230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 103854ed90a8SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1039230d8442SVladimir Kondratiev continue; 104054ed90a8SVladimir Kondratiev 104154ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 104254ed90a8SVladimir Kondratiev 104354ed90a8SVladimir Kondratiev return v; 104454ed90a8SVladimir Kondratiev } 104554ed90a8SVladimir Kondratiev 104654ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 104754ed90a8SVladimir Kondratiev 104854ed90a8SVladimir Kondratiev return NULL; 104954ed90a8SVladimir Kondratiev } 105054ed90a8SVladimir Kondratiev 105170812421SVladimir Kondratiev /* Use one of 2 strategies: 105270812421SVladimir Kondratiev * 105370812421SVladimir Kondratiev * 1. New (real broadcast): 105470812421SVladimir Kondratiev * use dedicated broadcast vring 105570812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 105670812421SVladimir Kondratiev * Find 1-st vring and return it; 105770812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 105870812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 105970812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 106070812421SVladimir Kondratiev * - for PBSS 106170812421SVladimir Kondratiev */ 106270812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1063fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1064fb3cac57SVladimir Kondratiev { 106541d6b093SVladimir Kondratiev struct vring *v; 1066b729aaf0SMaya Erez struct vring_tx_data *txdata; 106741d6b093SVladimir Kondratiev int i = wil->bcast_vring; 1068fb3cac57SVladimir Kondratiev 106941d6b093SVladimir Kondratiev if (i < 0) 107041d6b093SVladimir Kondratiev return NULL; 1071fb3cac57SVladimir Kondratiev v = &wil->vring_tx[i]; 1072b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1073b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1074fb3cac57SVladimir Kondratiev return NULL; 1075230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1076230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 1077230d8442SVladimir Kondratiev return NULL; 1078fb3cac57SVladimir Kondratiev 1079fb3cac57SVladimir Kondratiev return v; 1080fb3cac57SVladimir Kondratiev } 1081fb3cac57SVladimir Kondratiev 108270812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 108370812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 108470812421SVladimir Kondratiev { 108570812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 108670812421SVladimir Kondratiev int cid = wil->vring2cid_tid[vring_index][0]; 108770812421SVladimir Kondratiev 108870812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 108970812421SVladimir Kondratiev } 109070812421SVladimir Kondratiev 109170812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 109270812421SVladimir Kondratiev struct sk_buff *skb) 109370812421SVladimir Kondratiev { 109470812421SVladimir Kondratiev struct vring *v, *v2; 109570812421SVladimir Kondratiev struct sk_buff *skb2; 109670812421SVladimir Kondratiev int i; 109770812421SVladimir Kondratiev u8 cid; 109870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 109970812421SVladimir Kondratiev char *src = eth->h_source; 1100b729aaf0SMaya Erez struct vring_tx_data *txdata; 110170812421SVladimir Kondratiev 110270812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 110370812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 110470812421SVladimir Kondratiev v = &wil->vring_tx[i]; 1105b729aaf0SMaya Erez txdata = &wil->vring_tx_data[i]; 1106b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 110770812421SVladimir Kondratiev continue; 110870812421SVladimir Kondratiev 110970812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 111070812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 111170812421SVladimir Kondratiev continue; 1112230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1113230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 111470812421SVladimir Kondratiev continue; 111570812421SVladimir Kondratiev 111670812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 111770812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 111870812421SVladimir Kondratiev continue; 111970812421SVladimir Kondratiev 112070812421SVladimir Kondratiev goto found; 112170812421SVladimir Kondratiev } 112270812421SVladimir Kondratiev 112370812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 112470812421SVladimir Kondratiev 112570812421SVladimir Kondratiev return NULL; 112670812421SVladimir Kondratiev 112770812421SVladimir Kondratiev found: 112870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 112970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 113070812421SVladimir Kondratiev 113170812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 113270812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 113370812421SVladimir Kondratiev v2 = &wil->vring_tx[i]; 113470812421SVladimir Kondratiev if (!v2->va) 113570812421SVladimir Kondratiev continue; 113670812421SVladimir Kondratiev cid = wil->vring2cid_tid[i][0]; 113770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 113870812421SVladimir Kondratiev continue; 1139230d8442SVladimir Kondratiev if (!wil->vring_tx_data[i].dot1x_open && 1140230d8442SVladimir Kondratiev (skb->protocol != cpu_to_be16(ETH_P_PAE))) 114170812421SVladimir Kondratiev continue; 114270812421SVladimir Kondratiev 114370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 114470812421SVladimir Kondratiev continue; 114570812421SVladimir Kondratiev 114670812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 114770812421SVladimir Kondratiev if (skb2) { 114870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 114970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 115070812421SVladimir Kondratiev wil_tx_vring(wil, v2, skb2); 115170812421SVladimir Kondratiev } else { 115270812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 115370812421SVladimir Kondratiev } 115470812421SVladimir Kondratiev } 115570812421SVladimir Kondratiev 115670812421SVladimir Kondratiev return v; 115770812421SVladimir Kondratiev } 115870812421SVladimir Kondratiev 115970812421SVladimir Kondratiev static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil, 116070812421SVladimir Kondratiev struct sk_buff *skb) 116170812421SVladimir Kondratiev { 116270812421SVladimir Kondratiev struct wireless_dev *wdev = wil->wdev; 116370812421SVladimir Kondratiev 116470812421SVladimir Kondratiev if (wdev->iftype != NL80211_IFTYPE_AP) 116570812421SVladimir Kondratiev return wil_find_tx_bcast_2(wil, skb); 116670812421SVladimir Kondratiev 116770812421SVladimir Kondratiev return wil_find_tx_bcast_1(wil, skb); 116870812421SVladimir Kondratiev } 116970812421SVladimir Kondratiev 117099b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 117199b55bd2SKirshenbaum Erez int vring_index) 11722be7d22fSVladimir Kondratiev { 117368ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 11742be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 11752be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 11762be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 11772be7d22fSVladimir Kondratiev d->dma.error = 0; 11782be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11797e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 118099b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 11812be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 11822be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 11832be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 11842be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 11852be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 11862be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 11872be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 11882be7d22fSVladimir Kondratiev 11892be7d22fSVladimir Kondratiev return 0; 11902be7d22fSVladimir Kondratiev } 11912be7d22fSVladimir Kondratiev 1192c236658fSVladimir Kondratiev static inline 1193c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1194c236658fSVladimir Kondratiev { 11953d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1196c236658fSVladimir Kondratiev } 1197c236658fSVladimir Kondratiev 11983d4bde15SVladimir Kondratiev /** 11993d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12003d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12013d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12023d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 12033d4bde15SVladimir Kondratiev */ 12043d4bde15SVladimir Kondratiev 12053d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 12063d4bde15SVladimir Kondratiev struct sk_buff *skb, 12073d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 12083d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1209504937d4SKirshenbaum Erez { 12103d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 12113d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 12123d4bde15SVladimir Kondratiev 12133d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 12143d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 12153d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 12163d4bde15SVladimir Kondratiev 12173d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 12183d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 12193d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 12203d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 12213d4bde15SVladimir Kondratiev 12223d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 12233d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 12243d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 12253d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 12263d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 12273d4bde15SVladimir Kondratiev } 12283d4bde15SVladimir Kondratiev 12293d4bde15SVladimir Kondratiev /** 12303d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 12313d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12323d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 12333d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 12343d4bde15SVladimir Kondratiev * 12353d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 12363d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 12373d4bde15SVladimir Kondratiev */ 12383d4bde15SVladimir Kondratiev 12393d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 12403d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1241504937d4SKirshenbaum Erez int protocol; 1242504937d4SKirshenbaum Erez 1243504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1244504937d4SKirshenbaum Erez return 0; 1245504937d4SKirshenbaum Erez 1246df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1247df2d08eeSVladimir Kondratiev 1248504937d4SKirshenbaum Erez switch (skb->protocol) { 1249504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1250504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1251df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1252504937d4SKirshenbaum Erez break; 1253504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1254504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1255504937d4SKirshenbaum Erez break; 1256504937d4SKirshenbaum Erez default: 1257504937d4SKirshenbaum Erez return -EINVAL; 1258504937d4SKirshenbaum Erez } 1259504937d4SKirshenbaum Erez 1260504937d4SKirshenbaum Erez switch (protocol) { 1261504937d4SKirshenbaum Erez case IPPROTO_TCP: 1262504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1263504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1264504937d4SKirshenbaum Erez d->dma.d0 |= 1265504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1266504937d4SKirshenbaum Erez break; 1267504937d4SKirshenbaum Erez case IPPROTO_UDP: 1268504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1269504937d4SKirshenbaum Erez d->dma.d0 |= 1270504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1271504937d4SKirshenbaum Erez break; 1272504937d4SKirshenbaum Erez default: 1273504937d4SKirshenbaum Erez return -EINVAL; 1274504937d4SKirshenbaum Erez } 1275504937d4SKirshenbaum Erez 1276504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1277504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1278504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1279504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1280504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1281504937d4SKirshenbaum Erez 1282504937d4SKirshenbaum Erez return 0; 1283504937d4SKirshenbaum Erez } 1284504937d4SKirshenbaum Erez 12853d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 12863d4bde15SVladimir Kondratiev { 12873d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 12883d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 12893d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 12903d4bde15SVladimir Kondratiev } 12913d4bde15SVladimir Kondratiev 12923d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 12933d4bde15SVladimir Kondratiev { 12943d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 12953d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 12963d4bde15SVladimir Kondratiev } 12973d4bde15SVladimir Kondratiev 12983d4bde15SVladimir Kondratiev static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct vring *vring, 12993d4bde15SVladimir Kondratiev struct sk_buff *skb) 13003d4bde15SVladimir Kondratiev { 13013d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13023d4bde15SVladimir Kondratiev 13033d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 13043d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 13053d4bde15SVladimir Kondratiev *_first_desc = NULL; 13063d4bde15SVladimir Kondratiev 13073d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 13083d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 13093d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 13103d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 13113d4bde15SVladimir Kondratiev 13123d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 13133d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 13143d4bde15SVladimir Kondratiev 13153d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 13163d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 13173d4bde15SVladimir Kondratiev 13183d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 13193d4bde15SVladimir Kondratiev int used, avail = wil_vring_avail_tx(vring); 13203d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 13213d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 13223d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 13233d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 13243d4bde15SVladimir Kondratiev int vring_index = vring - wil->vring_tx; 13253d4bde15SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 13263d4bde15SVladimir Kondratiev uint i = swhead; 13273d4bde15SVladimir Kondratiev dma_addr_t pa; 13283d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 13293d4bde15SVladimir Kondratiev int rem_data = mss; 13303d4bde15SVladimir Kondratiev int lenmss; 13313d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 13323d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 13333d4bde15SVladimir Kondratiev bool is_ipv4; 13343d4bde15SVladimir Kondratiev int tcp_hdr_len; 13353d4bde15SVladimir Kondratiev int skb_net_hdr_len; 13363d4bde15SVladimir Kondratiev int gso_type; 1337e3d2ed94SHamad Kadmany int rc = -EINVAL; 13383d4bde15SVladimir Kondratiev 13393d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 13403d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 13413d4bde15SVladimir Kondratiev 13423d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 13433d4bde15SVladimir Kondratiev return -EINVAL; 13443d4bde15SVladimir Kondratiev 13453d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 13463d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 13473d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 13483d4bde15SVladimir Kondratiev * this is the initial check only. 13493d4bde15SVladimir Kondratiev */ 13503d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 13513d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 13523d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 13533d4bde15SVladimir Kondratiev vring_index, min_desc_required); 13543d4bde15SVladimir Kondratiev return -ENOMEM; 13553d4bde15SVladimir Kondratiev } 13563d4bde15SVladimir Kondratiev 13573d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 13583d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 13593d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 13603d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 13613d4bde15SVladimir Kondratiev 13623d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 13633d4bde15SVladimir Kondratiev switch (gso_type) { 13643d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 13653d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 13663d4bde15SVladimir Kondratiev * as required by the offloading doc 13673d4bde15SVladimir Kondratiev */ 13683d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 13693d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 13703d4bde15SVladimir Kondratiev is_ipv4 = true; 13713d4bde15SVladimir Kondratiev break; 13723d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 13733d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 13743d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 13753d4bde15SVladimir Kondratiev is_ipv4 = false; 13763d4bde15SVladimir Kondratiev break; 13773d4bde15SVladimir Kondratiev default: 13783d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 13793d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 13803d4bde15SVladimir Kondratiev */ 13813d4bde15SVladimir Kondratiev return -EINVAL; 13823d4bde15SVladimir Kondratiev } 13833d4bde15SVladimir Kondratiev 13843d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 13853d4bde15SVladimir Kondratiev return -EINVAL; 13863d4bde15SVladimir Kondratiev 13873d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 13883d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 13893d4bde15SVladimir Kondratiev */ 13903d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 13913d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 13923d4bde15SVladimir Kondratiev 13933d4bde15SVladimir Kondratiev _hdr_desc = &vring->va[i].tx; 13943d4bde15SVladimir Kondratiev 13953d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 13963d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 13973d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 13983d4bde15SVladimir Kondratiev goto err_exit; 13993d4bde15SVladimir Kondratiev } 14003d4bde15SVladimir Kondratiev 14013d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 14023d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 14033d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 14043d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 14053d4bde15SVladimir Kondratiev 14063d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14073d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 14083d4bde15SVladimir Kondratiev 14093d4bde15SVladimir Kondratiev descs_used++; 14103d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 14113d4bde15SVladimir Kondratiev 14123d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 14133d4bde15SVladimir Kondratiev if (headlen) { 14143d4bde15SVladimir Kondratiev len = headlen; 14153d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 14163d4bde15SVladimir Kondratiev len); 14173d4bde15SVladimir Kondratiev } else { 14183d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 14193d4bde15SVladimir Kondratiev len = frag->size; 14203d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 14213d4bde15SVladimir Kondratiev } 14223d4bde15SVladimir Kondratiev 14233d4bde15SVladimir Kondratiev while (len) { 14243d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14253d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 14263d4bde15SVladimir Kondratiev len, rem_data, descs_used); 14273d4bde15SVladimir Kondratiev 14283d4bde15SVladimir Kondratiev if (descs_used == avail) { 1429e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1430e3d2ed94SHamad Kadmany rc = -ENOMEM; 1431e3d2ed94SHamad Kadmany goto mem_error; 14323d4bde15SVladimir Kondratiev } 14333d4bde15SVladimir Kondratiev 14343d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 14353d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 14363d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 14373d4bde15SVladimir Kondratiev 14383d4bde15SVladimir Kondratiev if (!headlen) { 14393d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 14403d4bde15SVladimir Kondratiev frag->size - len, lenmss, 14413d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14423d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 14433d4bde15SVladimir Kondratiev } else { 14443d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 14453d4bde15SVladimir Kondratiev skb->data + 14463d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 14473d4bde15SVladimir Kondratiev lenmss, 14483d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 14493d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 14503d4bde15SVladimir Kondratiev headlen -= lenmss; 14513d4bde15SVladimir Kondratiev } 14523d4bde15SVladimir Kondratiev 1453e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1454e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1455e3d2ed94SHamad Kadmany goto mem_error; 1456e3d2ed94SHamad Kadmany } 14573d4bde15SVladimir Kondratiev 14583d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 14593d4bde15SVladimir Kondratiev 14603d4bde15SVladimir Kondratiev if (!_first_desc) { 14613d4bde15SVladimir Kondratiev _first_desc = _desc; 14623d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 14633d4bde15SVladimir Kondratiev d = first_desc; 14643d4bde15SVladimir Kondratiev } else { 14653d4bde15SVladimir Kondratiev d = &desc_mem; 14663d4bde15SVladimir Kondratiev } 14673d4bde15SVladimir Kondratiev 14683d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 14693d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 14703d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 14713d4bde15SVladimir Kondratiev skb_net_hdr_len); 14723d4bde15SVladimir Kondratiev 14733d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 14743d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 14753d4bde15SVladimir Kondratiev 14763d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 14773d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 14783d4bde15SVladimir Kondratiev len -= lenmss; 14793d4bde15SVladimir Kondratiev rem_data -= lenmss; 14803d4bde15SVladimir Kondratiev 14813d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 14823d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 14833d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 14843d4bde15SVladimir Kondratiev 14853d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 14863d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 14873d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 14883d4bde15SVladimir Kondratiev /* first segment include hdr desc for 14893d4bde15SVladimir Kondratiev * release 14903d4bde15SVladimir Kondratiev */ 14913d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 14923d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 14933d4bde15SVladimir Kondratiev sg_desc_cnt + 14943d4bde15SVladimir Kondratiev 1); 14953d4bde15SVladimir Kondratiev hdr_compensation_need = false; 14963d4bde15SVladimir Kondratiev } else { 14973d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 14983d4bde15SVladimir Kondratiev sg_desc_cnt); 14993d4bde15SVladimir Kondratiev } 15003d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 15013d4bde15SVladimir Kondratiev 15023d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 15033d4bde15SVladimir Kondratiev 15043d4bde15SVladimir Kondratiev /* first descriptor may also be the last 15053d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 15063d4bde15SVladimir Kondratiev * it twice 15073d4bde15SVladimir Kondratiev */ 15083d4bde15SVladimir Kondratiev if (first_desc != d) 15093d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 15103d4bde15SVladimir Kondratiev 15113d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 15123d4bde15SVladimir Kondratiev * of this TS processing 15133d4bde15SVladimir Kondratiev */ 15143d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 15153d4bde15SVladimir Kondratiev *_desc = *d; 15163d4bde15SVladimir Kondratiev 15173d4bde15SVladimir Kondratiev rem_data = mss; 15183d4bde15SVladimir Kondratiev _first_desc = NULL; 15193d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 15203d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 15213d4bde15SVladimir Kondratiev *_desc = *d; 15223d4bde15SVladimir Kondratiev } 15233d4bde15SVladimir Kondratiev } 15243d4bde15SVladimir Kondratiev 15253d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 15263d4bde15SVladimir Kondratiev * in this case d pointer is invalid 15273d4bde15SVladimir Kondratiev */ 15283d4bde15SVladimir Kondratiev if (_first_desc == _desc) 15293d4bde15SVladimir Kondratiev d = first_desc; 15303d4bde15SVladimir Kondratiev 15313d4bde15SVladimir Kondratiev /* Last data descriptor */ 15323d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 15333d4bde15SVladimir Kondratiev *_desc = *d; 15343d4bde15SVladimir Kondratiev 15353d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 15363d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 15373d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 15383d4bde15SVladimir Kondratiev 15393d4bde15SVladimir Kondratiev /* hold reference to skb 15403d4bde15SVladimir Kondratiev * to prevent skb release before accounting 15413d4bde15SVladimir Kondratiev * in case of immediate "tx done" 15423d4bde15SVladimir Kondratiev */ 15433d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 15443d4bde15SVladimir Kondratiev 15453d4bde15SVladimir Kondratiev /* performance monitoring */ 15463d4bde15SVladimir Kondratiev used = wil_vring_used_tx(vring); 15473d4bde15SVladimir Kondratiev if (wil_val_in_range(vring_idle_trsh, 15483d4bde15SVladimir Kondratiev used, used + descs_used)) { 15493d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 15503d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 15513d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 15523d4bde15SVladimir Kondratiev } 15533d4bde15SVladimir Kondratiev 15543d4bde15SVladimir Kondratiev /* advance swhead */ 15553d4bde15SVladimir Kondratiev wil_vring_advance_head(vring, descs_used); 1556e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 15573d4bde15SVladimir Kondratiev 15583d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 15593d4bde15SVladimir Kondratiev * committing them to HW 15603d4bde15SVladimir Kondratiev */ 15613d4bde15SVladimir Kondratiev wmb(); 15623d4bde15SVladimir Kondratiev 1563b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 15643d4bde15SVladimir Kondratiev return 0; 15653d4bde15SVladimir Kondratiev 1566e3d2ed94SHamad Kadmany mem_error: 15673d4bde15SVladimir Kondratiev while (descs_used > 0) { 15683d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 15693d4bde15SVladimir Kondratiev 15703d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15713d4bde15SVladimir Kondratiev d = (struct vring_tx_desc *)&vring->va[i].tx; 15723d4bde15SVladimir Kondratiev _desc = &vring->va[i].tx; 15733d4bde15SVladimir Kondratiev *d = *_desc; 15743d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 15753d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 15763d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 15773d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 15783d4bde15SVladimir Kondratiev descs_used--; 15793d4bde15SVladimir Kondratiev } 15803d4bde15SVladimir Kondratiev err_exit: 1581e3d2ed94SHamad Kadmany return rc; 15823d4bde15SVladimir Kondratiev } 15833d4bde15SVladimir Kondratiev 15845933a06dSVladimir Kondratiev static int __wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 15852be7d22fSVladimir Kondratiev struct sk_buff *skb) 15862be7d22fSVladimir Kondratiev { 15872be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 158868ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 158968ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 15902be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 15912be7d22fSVladimir Kondratiev int avail = wil_vring_avail_tx(vring); 15922be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1593504937d4SKirshenbaum Erez uint f = 0; 15942be7d22fSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 15957c0acf86SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 15962be7d22fSVladimir Kondratiev uint i = swhead; 15972be7d22fSVladimir Kondratiev dma_addr_t pa; 15980436fd9aSVladimir Shulman int used; 159941d6b093SVladimir Kondratiev bool mcast = (vring_index == wil->bcast_vring); 160041d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 16012be7d22fSVladimir Kondratiev 16023d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "%s() %d bytes to vring %d\n", 16033d4bde15SVladimir Kondratiev __func__, skb->len, vring_index); 16042be7d22fSVladimir Kondratiev 16055933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 16065933a06dSVladimir Kondratiev return -EINVAL; 16075933a06dSVladimir Kondratiev 160833c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 160970801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 16105b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 16115b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 16122be7d22fSVladimir Kondratiev return -ENOMEM; 16132be7d22fSVladimir Kondratiev } 16148fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16152be7d22fSVladimir Kondratiev 16168fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 16172be7d22fSVladimir Kondratiev 16185b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 16195b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 16207743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 16212be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 16222be7d22fSVladimir Kondratiev 16232be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 16242be7d22fSVladimir Kondratiev return -EINVAL; 16252232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16262be7d22fSVladimir Kondratiev /* 1-st segment */ 162741d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 162841d6b093SVladimir Kondratiev if (unlikely(mcast)) { 162941d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1630230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 163141d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 163241d6b093SVladimir Kondratiev } 1633504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 16343d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 16355b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1636504937d4SKirshenbaum Erez vring_index); 1637504937d4SKirshenbaum Erez goto dma_error; 1638504937d4SKirshenbaum Erez } 1639504937d4SKirshenbaum Erez 1640c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 16413d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 164268ada71eSVladimir Kondratiev 16432be7d22fSVladimir Kondratiev /* middle segments */ 1644504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 16452be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 16462be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 16472be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 16488fe59627SVladimir Kondratiev 1649e59d16c0SVladimir Kondratiev *_d = *d; 16505b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 16515b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 16525b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 16532be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 16548fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 16552be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 16562be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1657e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1658e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1659e3d2ed94SHamad Kadmany vring_index); 16602be7d22fSVladimir Kondratiev goto dma_error; 1661e3d2ed94SHamad Kadmany } 16622232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 166399b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1664c236658fSVladimir Kondratiev /* no need to check return code - 1665c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1666c236658fSVladimir Kondratiev * it will succeed here too 1667c236658fSVladimir Kondratiev */ 16683d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 16692be7d22fSVladimir Kondratiev } 16702be7d22fSVladimir Kondratiev /* for the last seg only */ 16712be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1672668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 16732be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 167468ada71eSVladimir Kondratiev *_d = *d; 16755b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 16765b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 16775b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 16782be7d22fSVladimir Kondratiev 16796cdadd4dSVladimir Kondratiev /* hold reference to skb 16806cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 16816cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 16826cdadd4dSVladimir Kondratiev */ 16836cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16846cdadd4dSVladimir Kondratiev 16850436fd9aSVladimir Shulman /* performance monitoring */ 16860436fd9aSVladimir Shulman used = wil_vring_used_tx(vring); 16870436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 16880436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 16897c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16900436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16910436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 16920436fd9aSVladimir Shulman } 16937c0acf86SVladimir Kondratiev 16942be7d22fSVladimir Kondratiev /* advance swhead */ 16952be7d22fSVladimir Kondratiev wil_vring_advance_head(vring, nr_frags + 1); 16965b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 16975b29c573SVladimir Kondratiev vring->swhead); 169898658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 16993d4bde15SVladimir Kondratiev 17003d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17013d4bde15SVladimir Kondratiev * committing them to HW 17023d4bde15SVladimir Kondratiev */ 17033d4bde15SVladimir Kondratiev wmb(); 17043d4bde15SVladimir Kondratiev 1705b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17062be7d22fSVladimir Kondratiev 17072be7d22fSVladimir Kondratiev return 0; 17082be7d22fSVladimir Kondratiev dma_error: 17092be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1710c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1711c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1712c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 17137e594444SVladimir Kondratiev 17142be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1715c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 17168fe59627SVladimir Kondratiev _d = &vring->va[i].tx; 171768ada71eSVladimir Kondratiev *d = *_d; 171868ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 17192232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1720f88f113aSVladimir Kondratiev 1721f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17222be7d22fSVladimir Kondratiev } 17232be7d22fSVladimir Kondratiev 17242be7d22fSVladimir Kondratiev return -EINVAL; 17252be7d22fSVladimir Kondratiev } 17262be7d22fSVladimir Kondratiev 17275933a06dSVladimir Kondratiev static int wil_tx_vring(struct wil6210_priv *wil, struct vring *vring, 17285933a06dSVladimir Kondratiev struct sk_buff *skb) 17295933a06dSVladimir Kondratiev { 17305933a06dSVladimir Kondratiev int vring_index = vring - wil->vring_tx; 17315933a06dSVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[vring_index]; 17325933a06dSVladimir Kondratiev int rc; 17335933a06dSVladimir Kondratiev 17345933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 17353d4bde15SVladimir Kondratiev 17363d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 17373d4bde15SVladimir Kondratiev (wil, vring, skb); 17383d4bde15SVladimir Kondratiev 17395933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 17403d4bde15SVladimir Kondratiev 17415933a06dSVladimir Kondratiev return rc; 17425933a06dSVladimir Kondratiev } 17435933a06dSVladimir Kondratiev 17442be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 17452be7d22fSVladimir Kondratiev { 17462be7d22fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 17473df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 174841d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 17492be7d22fSVladimir Kondratiev struct vring *vring; 1750aa27deaaSVladimir Kondratiev static bool pr_once_fw; 17512be7d22fSVladimir Kondratiev int rc; 17522be7d22fSVladimir Kondratiev 17537743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s()\n", __func__); 175433c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1755aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 17562be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1757aa27deaaSVladimir Kondratiev pr_once_fw = true; 1758aa27deaaSVladimir Kondratiev } 17592be7d22fSVladimir Kondratiev goto drop; 17602be7d22fSVladimir Kondratiev } 176133c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwconnected, wil->status))) { 1762a3dcbae2SVladimir Kondratiev wil_err_ratelimited(wil, "FW not connected\n"); 17632be7d22fSVladimir Kondratiev goto drop; 17642be7d22fSVladimir Kondratiev } 176533c477fdSVladimir Kondratiev if (unlikely(wil->wdev->iftype == NL80211_IFTYPE_MONITOR)) { 17662be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 17672be7d22fSVladimir Kondratiev goto drop; 17682be7d22fSVladimir Kondratiev } 1769aa27deaaSVladimir Kondratiev pr_once_fw = false; 1770d58db4e4SVladimir Kondratiev 17712be7d22fSVladimir Kondratiev /* find vring */ 177254ed90a8SVladimir Kondratiev if (wil->wdev->iftype == NL80211_IFTYPE_STATION) { 177354ed90a8SVladimir Kondratiev /* in STA mode (ESS), all to same VRING */ 177454ed90a8SVladimir Kondratiev vring = wil_find_tx_vring_sta(wil, skb); 177554ed90a8SVladimir Kondratiev } else { /* direct communication, find matching VRING */ 177641d6b093SVladimir Kondratiev vring = bcast ? wil_find_tx_bcast(wil, skb) : 177741d6b093SVladimir Kondratiev wil_find_tx_ucast(wil, skb); 177854ed90a8SVladimir Kondratiev } 177933c477fdSVladimir Kondratiev if (unlikely(!vring)) { 17805aed1393SVladimir Kondratiev wil_dbg_txrx(wil, "No Tx VRING found for %pM\n", eth->h_dest); 17812be7d22fSVladimir Kondratiev goto drop; 17822be7d22fSVladimir Kondratiev } 17832be7d22fSVladimir Kondratiev /* set up vring entry */ 17842be7d22fSVladimir Kondratiev rc = wil_tx_vring(wil, vring, skb); 1785d58db4e4SVladimir Kondratiev 17862232abd5SVladimir Kondratiev /* do we still have enough room in the vring? */ 178733c477fdSVladimir Kondratiev if (unlikely(wil_vring_avail_tx(vring) < wil_vring_wmark_low(vring))) { 17882232abd5SVladimir Kondratiev netif_tx_stop_all_queues(wil_to_ndev(wil)); 178955f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_stop : ring full\n"); 179055f8f680SVladimir Kondratiev } 17912232abd5SVladimir Kondratiev 17922be7d22fSVladimir Kondratiev switch (rc) { 17932be7d22fSVladimir Kondratiev case 0: 1794795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 17952be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 17962be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 17972be7d22fSVladimir Kondratiev case -ENOMEM: 17982be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 17992be7d22fSVladimir Kondratiev default: 1800afda8bb5SVladimir Kondratiev break; /* goto drop; */ 18012be7d22fSVladimir Kondratiev } 18022be7d22fSVladimir Kondratiev drop: 18032be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 18042be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 18052be7d22fSVladimir Kondratiev 18062be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 18072be7d22fSVladimir Kondratiev } 18082be7d22fSVladimir Kondratiev 1809713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 1810713c8a29SVladimir Kondratiev { 1811713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1812713c8a29SVladimir Kondratiev 1813713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 1814713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 1815713c8a29SVladimir Kondratiev } 1816713c8a29SVladimir Kondratiev 1817713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 1818713c8a29SVladimir Kondratiev { 1819713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 1820713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 1821713c8a29SVladimir Kondratiev else 1822713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 1823713c8a29SVladimir Kondratiev } 1824713c8a29SVladimir Kondratiev 18252be7d22fSVladimir Kondratiev /** 18262be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 18272be7d22fSVladimir Kondratiev * 1828e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 1829e0287c4aSVladimir Kondratiev * 18302be7d22fSVladimir Kondratiev * Safe to call from IRQ 18312be7d22fSVladimir Kondratiev */ 1832e0287c4aSVladimir Kondratiev int wil_tx_complete(struct wil6210_priv *wil, int ringid) 18332be7d22fSVladimir Kondratiev { 1834795ce734SVladimir Kondratiev struct net_device *ndev = wil_to_ndev(wil); 18352be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 18362be7d22fSVladimir Kondratiev struct vring *vring = &wil->vring_tx[ringid]; 1837097638a0SVladimir Kondratiev struct vring_tx_data *txdata = &wil->vring_tx_data[ringid]; 1838e0287c4aSVladimir Kondratiev int done = 0; 1839c8b78b5fSVladimir Kondratiev int cid = wil->vring2cid_tid[ringid][0]; 184041d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 1841c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 18420436fd9aSVladimir Shulman int used_before_complete; 18430436fd9aSVladimir Shulman int used_new; 18442be7d22fSVladimir Kondratiev 184533c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 18462be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 1847e0287c4aSVladimir Kondratiev return 0; 18482be7d22fSVladimir Kondratiev } 18492be7d22fSVladimir Kondratiev 185033c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 1851097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 1852097638a0SVladimir Kondratiev return 0; 1853097638a0SVladimir Kondratiev } 1854097638a0SVladimir Kondratiev 18557743882dSVladimir Kondratiev wil_dbg_txrx(wil, "%s(%d)\n", __func__, ringid); 18562be7d22fSVladimir Kondratiev 18570436fd9aSVladimir Shulman used_before_complete = wil_vring_used_tx(vring); 18580436fd9aSVladimir Shulman 185941d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 186041d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 186141d6b093SVladimir Kondratiev 18622be7d22fSVladimir Kondratiev while (!wil_vring_is_empty(vring)) { 1863c236658fSVladimir Kondratiev int new_swtail; 1864c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 1865c236658fSVladimir Kondratiev /** 1866c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 18673d4bde15SVladimir Kondratiev * last fragment. look for it. 18683d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 1869c236658fSVladimir Kondratiev */ 1870c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 1871c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 1872c236658fSVladimir Kondratiev 1873c236658fSVladimir Kondratiev _d = &vring->va[lf].tx; 187433c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 1875c236658fSVladimir Kondratiev break; 1876c236658fSVladimir Kondratiev 1877c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 1878c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 18794de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 18807e594444SVladimir Kondratiev u16 dmalen; 188176dfa4b7SVladimir Kondratiev struct sk_buff *skb; 188276dfa4b7SVladimir Kondratiev 188376dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 188476dfa4b7SVladimir Kondratiev skb = ctx->skb; 1885c236658fSVladimir Kondratiev _d = &vring->va[vring->swtail].tx; 18864de41befSVladimir Kondratiev 188768ada71eSVladimir Kondratiev *d = *_d; 18884de41befSVladimir Kondratiev 18897e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 189098658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 189198658095SVladimir Kondratiev d->dma.error); 18927743882dSVladimir Kondratiev wil_dbg_txrx(wil, 18935b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 18945b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 18955b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 18965b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 18972be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 18982be7d22fSVladimir Kondratiev 18992232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1900f88f113aSVladimir Kondratiev 19012be7d22fSVladimir Kondratiev if (skb) { 190233c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 1903795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 1904795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 190541d6b093SVladimir Kondratiev if (stats) { 190641d6b093SVladimir Kondratiev stats->tx_packets++; 1907c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 190841d6b093SVladimir Kondratiev } 1909795ce734SVladimir Kondratiev } else { 1910795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 191141d6b093SVladimir Kondratiev if (stats) 1912c8b78b5fSVladimir Kondratiev stats->tx_errors++; 1913795ce734SVladimir Kondratiev } 1914713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 19152be7d22fSVladimir Kondratiev } 1916f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 1917c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 191803269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 191903269c65SVladimir Kondratiev * so hardware will not try to process this desc., 192003269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 192103269c65SVladimir Kondratiev */ 19222be7d22fSVladimir Kondratiev vring->swtail = wil_vring_next_tail(vring); 1923e0287c4aSVladimir Kondratiev done++; 19242be7d22fSVladimir Kondratiev } 1925c236658fSVladimir Kondratiev } 192667c3e1b4SVladimir Kondratiev 19270436fd9aSVladimir Shulman /* performance monitoring */ 19280436fd9aSVladimir Shulman used_new = wil_vring_used_tx(vring); 19290436fd9aSVladimir Shulman if (wil_val_in_range(vring_idle_trsh, 19300436fd9aSVladimir Shulman used_new, used_before_complete)) { 19310436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 19320436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 19337c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 19347c0acf86SVladimir Kondratiev } 193567c3e1b4SVladimir Kondratiev 193655f8f680SVladimir Kondratiev if (wil_vring_avail_tx(vring) > wil_vring_wmark_high(vring)) { 193755f8f680SVladimir Kondratiev wil_dbg_txrx(wil, "netif_tx_wake : ring not full\n"); 19382be7d22fSVladimir Kondratiev netif_tx_wake_all_queues(wil_to_ndev(wil)); 193955f8f680SVladimir Kondratiev } 1940e0287c4aSVladimir Kondratiev 1941e0287c4aSVladimir Kondratiev return done; 19422be7d22fSVladimir Kondratiev } 1943