12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3e00243faSLior David * Copyright (c) 2018, The Linux Foundation. All rights reserved. 42be7d22fSVladimir Kondratiev * 52be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 62be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 72be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 82be7d22fSVladimir Kondratiev * 92be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 102be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 112be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 122be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 132be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 142be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 152be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 162be7d22fSVladimir Kondratiev */ 172be7d22fSVladimir Kondratiev 182be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 192be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 202be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 212be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 22504937d4SKirshenbaum Erez #include <linux/ip.h> 23504937d4SKirshenbaum Erez #include <linux/ipv6.h> 24504937d4SKirshenbaum Erez #include <net/ipv6.h> 250786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 262be7d22fSVladimir Kondratiev 272be7d22fSVladimir Kondratiev #include "wil6210.h" 282be7d22fSVladimir Kondratiev #include "wmi.h" 292be7d22fSVladimir Kondratiev #include "txrx.h" 3098658095SVladimir Kondratiev #include "trace.h" 312be7d22fSVladimir Kondratiev 322be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3378484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 342be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 352be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 362be7d22fSVladimir Kondratiev 37c406ea7cSVladimir Kondratiev bool rx_align_2; 3878484c44SMaya Erez module_param(rx_align_2, bool, 0444); 39c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 40c406ea7cSVladimir Kondratiev 4152a45702SLior David bool rx_large_buf; 4252a45702SLior David module_param(rx_large_buf, bool, 0444); 4352a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4452a45702SLior David 45c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 46c406ea7cSVladimir Kondratiev { 47c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 48c406ea7cSVladimir Kondratiev } 49c406ea7cSVladimir Kondratiev 5010590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 5110590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 522be7d22fSVladimir Kondratiev { 5310590c6aSGidon Studinski return ring->size / 8; 542be7d22fSVladimir Kondratiev } 552be7d22fSVladimir Kondratiev 5610590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 5710590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 582be7d22fSVladimir Kondratiev { 5910590c6aSGidon Studinski return ring->size / 4; 605bb6423eSVladimir Kondratiev } 615bb6423eSVladimir Kondratiev 62f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 6310590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 64f9e3033fSDedy Lansky { 6510590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 66f9e3033fSDedy Lansky } 67f9e3033fSDedy Lansky 68f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 6910590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 70f9e3033fSDedy Lansky { 7110590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 72f9e3033fSDedy Lansky } 73f9e3033fSDedy Lansky 74fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 75fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 76fe9ee51eSMaya Erez { 77fe9ee51eSMaya Erez int i; 78fe9ee51eSMaya Erez unsigned long data_comp_to; 79fe9ee51eSMaya Erez 80fe9ee51eSMaya Erez for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 8110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 8210590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 8310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 8410590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 85fe9ee51eSMaya Erez 86fe9ee51eSMaya Erez spin_lock(&txdata->lock); 87fe9ee51eSMaya Erez 88fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 89fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 90fe9ee51eSMaya Erez continue; 91fe9ee51eSMaya Erez } 92fe9ee51eSMaya Erez 93fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 94fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 95fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 9610590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 97fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 98fe9ee51eSMaya Erez wil_dbg_pm(wil, 99fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 100fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 101fe9ee51eSMaya Erez return false; 102fe9ee51eSMaya Erez } 103fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 104fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 105fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 106fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 107fe9ee51eSMaya Erez msleep(20); 108fe9ee51eSMaya Erez spin_lock(&txdata->lock); 109fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 110fe9ee51eSMaya Erez break; 111fe9ee51eSMaya Erez } 112fe9ee51eSMaya Erez } 113fe9ee51eSMaya Erez 114fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 115fe9ee51eSMaya Erez } 116fe9ee51eSMaya Erez 117fe9ee51eSMaya Erez return true; 118fe9ee51eSMaya Erez } 119fe9ee51eSMaya Erez 12010590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1212be7d22fSVladimir Kondratiev { 1222be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1232be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1242be7d22fSVladimir Kondratiev uint i; 1252be7d22fSVladimir Kondratiev 126af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1279cf10d62SVladimir Kondratiev 1282be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1292be7d22fSVladimir Kondratiev 1302be7d22fSVladimir Kondratiev vring->swhead = 0; 1312be7d22fSVladimir Kondratiev vring->swtail = 0; 132f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1332be7d22fSVladimir Kondratiev if (!vring->ctx) { 1342be7d22fSVladimir Kondratiev vring->va = NULL; 1352be7d22fSVladimir Kondratiev return -ENOMEM; 1362be7d22fSVladimir Kondratiev } 137f2de576dSHamad Kadmany 1380436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 139f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 140f2de576dSHamad Kadmany * 141f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 142f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1433dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1443dc2c13bSLazar Alexei * allocation before allocating vring memory. 145f2de576dSHamad Kadmany * 146f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 147f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 148f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1492be7d22fSVladimir Kondratiev */ 1503dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 151f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 152f2de576dSHamad Kadmany 1532be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1542be7d22fSVladimir Kondratiev if (!vring->va) { 1552be7d22fSVladimir Kondratiev kfree(vring->ctx); 1562be7d22fSVladimir Kondratiev vring->ctx = NULL; 1572be7d22fSVladimir Kondratiev return -ENOMEM; 1582be7d22fSVladimir Kondratiev } 159f2de576dSHamad Kadmany 1603dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1613dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1623dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 163f2de576dSHamad Kadmany 1642be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1652be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1662be7d22fSVladimir Kondratiev * we can use any 1672be7d22fSVladimir Kondratiev */ 1682be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 16910590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 17010590c6aSGidon Studinski &vring->va[i].tx.legacy; 1718fe59627SVladimir Kondratiev 17268ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1732be7d22fSVladimir Kondratiev } 1742be7d22fSVladimir Kondratiev 17539c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 17639c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1772be7d22fSVladimir Kondratiev 1782be7d22fSVladimir Kondratiev return 0; 1792be7d22fSVladimir Kondratiev } 1802be7d22fSVladimir Kondratiev 1819202d7b6SMaya Erez static void wil_txdesc_unmap(struct device *dev, union wil_tx_desc *desc, 1822232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1832232abd5SVladimir Kondratiev { 1849202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 1852232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1862232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1878fe59627SVladimir Kondratiev 1882232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1892232abd5SVladimir Kondratiev case wil_mapped_as_single: 1902232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1912232abd5SVladimir Kondratiev break; 1922232abd5SVladimir Kondratiev case wil_mapped_as_page: 1932232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1942232abd5SVladimir Kondratiev break; 1952232abd5SVladimir Kondratiev default: 1962232abd5SVladimir Kondratiev break; 1972232abd5SVladimir Kondratiev } 1982232abd5SVladimir Kondratiev } 1992232abd5SVladimir Kondratiev 20096c93589SGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring) 2012be7d22fSVladimir Kondratiev { 2022be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2032be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2042be7d22fSVladimir Kondratiev 2059b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 20696c93589SGidon Studinski if (!vring->is_rx) { 20710590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 208ef77285fSVladimir Kondratiev 209ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 210ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 211ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 212ef77285fSVladimir Kondratiev } else { 213ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 214ef77285fSVladimir Kondratiev vring->size, vring->va, 215ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 216ef77285fSVladimir Kondratiev } 217ef77285fSVladimir Kondratiev 21810590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 21968ada71eSVladimir Kondratiev dma_addr_t pa; 2207e594444SVladimir Kondratiev u16 dmalen; 221f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 22268ada71eSVladimir Kondratiev 22396c93589SGidon Studinski if (!vring->is_rx) { 22468ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 22568ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 22610590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 22768ada71eSVladimir Kondratiev 228f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 22934b8886eSMaya Erez if (!ctx) { 23034b8886eSMaya Erez wil_dbg_txrx(wil, 23134b8886eSMaya Erez "ctx(%d) was already completed\n", 23234b8886eSMaya Erez vring->swtail); 23310590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 23434b8886eSMaya Erez continue; 23534b8886eSMaya Erez } 23668ada71eSVladimir Kondratiev *d = *_d; 2379202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 238f88f113aSVladimir Kondratiev if (ctx->skb) 239f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 24010590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2412be7d22fSVladimir Kondratiev } else { /* rx */ 24268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 24368ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 24410590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 24568ada71eSVladimir Kondratiev 246f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 24768ada71eSVladimir Kondratiev *d = *_d; 24868ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2497e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2507e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 251f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 25210590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2532be7d22fSVladimir Kondratiev } 2542be7d22fSVladimir Kondratiev } 2552be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2562be7d22fSVladimir Kondratiev kfree(vring->ctx); 2572be7d22fSVladimir Kondratiev vring->pa = 0; 2582be7d22fSVladimir Kondratiev vring->va = NULL; 2592be7d22fSVladimir Kondratiev vring->ctx = NULL; 2602be7d22fSVladimir Kondratiev } 2612be7d22fSVladimir Kondratiev 2622be7d22fSVladimir Kondratiev /** 2632be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2642be7d22fSVladimir Kondratiev * 2652be7d22fSVladimir Kondratiev * Safe to call from IRQ 2662be7d22fSVladimir Kondratiev */ 26710590c6aSGidon Studinski static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct wil_ring *vring, 2682be7d22fSVladimir Kondratiev u32 i, int headroom) 2692be7d22fSVladimir Kondratiev { 2702be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 27152a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 27268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 27310590c6aSGidon Studinski volatile struct vring_rx_desc *_d = &vring->va[i].rx.legacy; 2742be7d22fSVladimir Kondratiev dma_addr_t pa; 2752be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2768fe59627SVladimir Kondratiev 2772be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2782be7d22fSVladimir Kondratiev return -ENOMEM; 2792be7d22fSVladimir Kondratiev 2802be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2812be7d22fSVladimir Kondratiev skb_put(skb, sz); 2822be7d22fSVladimir Kondratiev 2832be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2842be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2852be7d22fSVladimir Kondratiev kfree_skb(skb); 2862be7d22fSVladimir Kondratiev return -ENOMEM; 2872be7d22fSVladimir Kondratiev } 2882be7d22fSVladimir Kondratiev 28948c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29068ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2912be7d22fSVladimir Kondratiev /* ip_length don't care */ 2922be7d22fSVladimir Kondratiev /* b11 don't care */ 2932be7d22fSVladimir Kondratiev /* error don't care */ 2942be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2957e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 29668ada71eSVladimir Kondratiev *_d = *d; 297f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2982be7d22fSVladimir Kondratiev 2992be7d22fSVladimir Kondratiev return 0; 3002be7d22fSVladimir Kondratiev } 3012be7d22fSVladimir Kondratiev 3022be7d22fSVladimir Kondratiev /** 3032be7d22fSVladimir Kondratiev * Adds radiotap header 3042be7d22fSVladimir Kondratiev * 3052be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3062be7d22fSVladimir Kondratiev * 3072be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3082be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3092be7d22fSVladimir Kondratiev * - Phy info 3102be7d22fSVladimir Kondratiev */ 3112be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 31233e61169SVladimir Kondratiev struct sk_buff *skb) 3132be7d22fSVladimir Kondratiev { 3142be7d22fSVladimir Kondratiev struct wil6210_rtap { 3152be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3162be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3172be7d22fSVladimir Kondratiev /* flags */ 3182be7d22fSVladimir Kondratiev u8 flags; 3192be7d22fSVladimir Kondratiev /* channel */ 3202be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3212be7d22fSVladimir Kondratiev __le16 chnl_flags; 3222be7d22fSVladimir Kondratiev /* MCS */ 3232be7d22fSVladimir Kondratiev u8 mcs_present; 3242be7d22fSVladimir Kondratiev u8 mcs_flags; 3252be7d22fSVladimir Kondratiev u8 mcs_index; 3262be7d22fSVladimir Kondratiev } __packed; 3272be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3282be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3292be7d22fSVladimir Kondratiev /* vendor */ 3302be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3312be7d22fSVladimir Kondratiev u8 vendor_ns; 3322be7d22fSVladimir Kondratiev __le16 vendor_skip; 3332be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3342be7d22fSVladimir Kondratiev } __packed; 33533e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3362be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3372be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3382be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3392be7d22fSVladimir Kondratiev static char phy_data[128]; 3407d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3412be7d22fSVladimir Kondratiev 3422be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3432be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3442be7d22fSVladimir Kondratiev /* calculate additional length */ 3452be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3462be7d22fSVladimir Kondratiev /** 3472be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3482be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3492be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3502be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3512be7d22fSVladimir Kondratiev */ 3522be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3532be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3548fe59627SVladimir Kondratiev 3552be7d22fSVladimir Kondratiev if (len > 8) { 3562be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3572be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3588fe59627SVladimir Kondratiev 3592be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3602be7d22fSVladimir Kondratiev phy_length = len - 8; 3612be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3622be7d22fSVladimir Kondratiev } 3632be7d22fSVladimir Kondratiev } 3642be7d22fSVladimir Kondratiev } 3652be7d22fSVladimir Kondratiev rtap_len += phy_length; 3662be7d22fSVladimir Kondratiev } 3672be7d22fSVladimir Kondratiev 3682be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3692be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3709165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3712be7d22fSVladimir Kondratiev return; 3722be7d22fSVladimir Kondratiev } 3732be7d22fSVladimir Kondratiev 374d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 3752be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3762be7d22fSVladimir Kondratiev 3772be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3782be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3792be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3802be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3812be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3822be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3832be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3842be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3852be7d22fSVladimir Kondratiev 3862be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3872be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3882be7d22fSVladimir Kondratiev 3892be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3902be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3912be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3922be7d22fSVladimir Kondratiev 3932be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3942be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3952be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3962be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3972be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3982be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 3992be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4002be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4012be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4022be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4032be7d22fSVladimir Kondratiev phy_length); 4042be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4052be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4062be7d22fSVladimir Kondratiev phy_length); 4072be7d22fSVladimir Kondratiev } 4082be7d22fSVladimir Kondratiev } 4092be7d22fSVladimir Kondratiev 410a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 411a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 412a8313341SVladimir Kondratiev { 413a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 414a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 415a8313341SVladimir Kondratiev } 416a8313341SVladimir Kondratiev 417fe9ee51eSMaya Erez bool wil_is_rx_idle(struct wil6210_priv *wil) 418fe9ee51eSMaya Erez { 419fe9ee51eSMaya Erez struct vring_rx_desc *_d; 42010590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 421fe9ee51eSMaya Erez 42210590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 423fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 424fe9ee51eSMaya Erez return false; 425fe9ee51eSMaya Erez 426fe9ee51eSMaya Erez return true; 427fe9ee51eSMaya Erez } 428fe9ee51eSMaya Erez 4292be7d22fSVladimir Kondratiev /** 4302be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4312be7d22fSVladimir Kondratiev * 43233e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 43333e61169SVladimir Kondratiev * 4342be7d22fSVladimir Kondratiev * Safe to call from IRQ 4352be7d22fSVladimir Kondratiev */ 4362be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 43710590c6aSGidon Studinski struct wil_ring *vring) 4382be7d22fSVladimir Kondratiev { 4392be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4405bd60982SLior David struct wil6210_vif *vif; 4415bd60982SLior David struct net_device *ndev; 44268ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 44368ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4442be7d22fSVladimir Kondratiev struct sk_buff *skb; 4452be7d22fSVladimir Kondratiev dma_addr_t pa; 446c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 44752a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4487e594444SVladimir Kondratiev u16 dmalen; 4492be7d22fSVladimir Kondratiev u8 ftype; 4505bd60982SLior David int cid, mid; 4513b282bc6SVladimir Kondratiev int i; 452c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 453c8b78b5fSVladimir Kondratiev 45433e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 45533e61169SVladimir Kondratiev 4563b282bc6SVladimir Kondratiev again: 45710590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4582be7d22fSVladimir Kondratiev return NULL; 4592be7d22fSVladimir Kondratiev 4603b282bc6SVladimir Kondratiev i = (int)vring->swhead; 46110590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 46233c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4632be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4642be7d22fSVladimir Kondratiev return NULL; 4652be7d22fSVladimir Kondratiev } 4662be7d22fSVladimir Kondratiev 467148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 468148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 46910590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 470148416a9SVladimir Kondratiev if (!skb) { 471148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4723b282bc6SVladimir Kondratiev goto again; 473148416a9SVladimir Kondratiev } 47468ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 47568ada71eSVladimir Kondratiev *d = *_d; 47668ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 47768ada71eSVladimir Kondratiev 47868ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 47968ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 48068ada71eSVladimir Kondratiev 481148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 482148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 483a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 48468ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 48568ada71eSVladimir Kondratiev 4863b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4875bd60982SLior David mid = wil_rxdesc_mid(d); 4885bd60982SLior David vif = wil->vifs[mid]; 4895bd60982SLior David 4905bd60982SLior David if (unlikely(!vif)) { 4915bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4925bd60982SLior David mid); 4935bd60982SLior David kfree_skb(skb); 4945bd60982SLior David goto again; 4955bd60982SLior David } 4965bd60982SLior David ndev = vif_to_ndev(vif); 4973b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4983b282bc6SVladimir Kondratiev 49933c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 500e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5013b282bc6SVladimir Kondratiev stats->rx_large_frame++; 502110dea00SWei Yongjun kfree_skb(skb); 5033b282bc6SVladimir Kondratiev goto again; 504e270045bSVladimir Kondratiev } 5057e594444SVladimir Kondratiev skb_trim(skb, dmalen); 50633e61169SVladimir Kondratiev 5071cbbcb08SVladimir Kondratiev prefetch(skb->data); 5081cbbcb08SVladimir Kondratiev 509c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 510c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 511c0d37713SVladimir Kondratiev 512c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 513c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 514c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5152be7d22fSVladimir Kondratiev 5162be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5172be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 51833e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5192be7d22fSVladimir Kondratiev 5202be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5212be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5222be7d22fSVladimir Kondratiev return skb; 523a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5242be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5252be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5262be7d22fSVladimir Kondratiev */ 52768ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 52833c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 529a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 530a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 531a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 532a8313341SVladimir Kondratiev 533a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 534a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 535a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5363b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 537a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 538a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 539a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 540a8313341SVladimir Kondratiev mid, cid, tid, seq); 5415bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 542a8313341SVladimir Kondratiev } else { 543a8313341SVladimir Kondratiev /* print again all info. One can enable only this 544a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 545a8313341SVladimir Kondratiev */ 546a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 547a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 548a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 549a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 550a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 551a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 552a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 553a8313341SVladimir Kondratiev } 5542be7d22fSVladimir Kondratiev kfree_skb(skb); 5553b282bc6SVladimir Kondratiev goto again; 5562be7d22fSVladimir Kondratiev } 5572be7d22fSVladimir Kondratiev 558c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5592be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5603b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5612be7d22fSVladimir Kondratiev kfree_skb(skb); 5623b282bc6SVladimir Kondratiev goto again; 5632be7d22fSVladimir Kondratiev } 5642be7d22fSVladimir Kondratiev 565504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 566504937d4SKirshenbaum Erez * and in case of error drop the packet 567504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 568504937d4SKirshenbaum Erez */ 56933c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 570504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 57133c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 572504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5734a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5744a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5754a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5764a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5774a68ab10SVladimir Kondratiev */ 578504937d4SKirshenbaum Erez } 579504937d4SKirshenbaum Erez 580c406ea7cSVladimir Kondratiev if (snaplen) { 581c406ea7cSVladimir Kondratiev /* Packet layout 582c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 583c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 584c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 585c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 586c406ea7cSVladimir Kondratiev */ 587c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 588c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 589c406ea7cSVladimir Kondratiev } 590c406ea7cSVladimir Kondratiev 5912be7d22fSVladimir Kondratiev return skb; 5922be7d22fSVladimir Kondratiev } 5932be7d22fSVladimir Kondratiev 5942be7d22fSVladimir Kondratiev /** 5952be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5962be7d22fSVladimir Kondratiev * buffers posted at @swtail 5975bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 5985bd60982SLior David * allocate skbs with headroom according to main interface only. This 5995bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6005bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6015bd60982SLior David * and we will need to fix this code once we add support. 6022be7d22fSVladimir Kondratiev */ 6032be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6042be7d22fSVladimir Kondratiev { 605e00243faSLior David struct net_device *ndev = wil->main_ndev; 60610590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6072be7d22fSVladimir Kondratiev u32 next_tail; 6082be7d22fSVladimir Kondratiev int rc = 0; 6092be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6102be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6112be7d22fSVladimir Kondratiev 61210590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6132be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6142be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6152be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 61633c477fdSVladimir Kondratiev if (unlikely(rc)) { 6173d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6182be7d22fSVladimir Kondratiev rc, v->swtail); 6192be7d22fSVladimir Kondratiev break; 6202be7d22fSVladimir Kondratiev } 6212be7d22fSVladimir Kondratiev } 622ab6d7cc3SMaya Erez 623ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 624ab6d7cc3SMaya Erez * committing them to HW 625ab6d7cc3SMaya Erez */ 626ab6d7cc3SMaya Erez wmb(); 627ab6d7cc3SMaya Erez 628b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6292be7d22fSVladimir Kondratiev 6302be7d22fSVladimir Kondratiev return rc; 6312be7d22fSVladimir Kondratiev } 6322be7d22fSVladimir Kondratiev 63358527421SVladimir Kondratiev /** 63458527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 63558527421SVladimir Kondratiev * @cs: One area of memory 63658527421SVladimir Kondratiev * @ct: Another area of memory 63758527421SVladimir Kondratiev * @count: The size of the area. 63858527421SVladimir Kondratiev * 63958527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 64058527421SVladimir Kondratiev * with minimal modifications 64158527421SVladimir Kondratiev */ 64258527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 64358527421SVladimir Kondratiev { 64458527421SVladimir Kondratiev const unsigned char *su1, *su2; 64558527421SVladimir Kondratiev int res = 0; 64658527421SVladimir Kondratiev 64758527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 64858527421SVladimir Kondratiev --su1, --su2, count--) { 64958527421SVladimir Kondratiev res = *su1 - *su2; 65058527421SVladimir Kondratiev if (res) 65158527421SVladimir Kondratiev break; 65258527421SVladimir Kondratiev } 65358527421SVladimir Kondratiev return res; 65458527421SVladimir Kondratiev } 65558527421SVladimir Kondratiev 65658527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 65758527421SVladimir Kondratiev { 65858527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 65958527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 66058527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 66158527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 66258527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 66358527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 66458527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 66558527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 66658527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 66758527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 66858527421SVladimir Kondratiev 66958527421SVladimir Kondratiev if (!cc->key_set) { 67058527421SVladimir Kondratiev wil_err_ratelimited(wil, 67158527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 67258527421SVladimir Kondratiev cid, tid, mc, key_id); 67358527421SVladimir Kondratiev return -EINVAL; 67458527421SVladimir Kondratiev } 67558527421SVladimir Kondratiev 67658527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 67758527421SVladimir Kondratiev wil_err_ratelimited(wil, 67858527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 67958527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 68058527421SVladimir Kondratiev return -EINVAL; 68158527421SVladimir Kondratiev } 68258527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 68358527421SVladimir Kondratiev 68458527421SVladimir Kondratiev return 0; 68558527421SVladimir Kondratiev } 68658527421SVladimir Kondratiev 6872be7d22fSVladimir Kondratiev /* 6882be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 689e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6902be7d22fSVladimir Kondratiev */ 691b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6922be7d22fSVladimir Kondratiev { 693c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 694e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 695c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 696e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 6972be7d22fSVladimir Kondratiev unsigned int len = skb->len; 698c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 69941d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 70058527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 701c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 702c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 703c42da999SVladimir Kondratiev * is not suitable, need to look at data 704c42da999SVladimir Kondratiev */ 705c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 706c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 707c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 708c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 709c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 710c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 711c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 712c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 713c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 714c42da999SVladimir Kondratiev }; 7152be7d22fSVladimir Kondratiev 7160553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7170553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7180553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7190553640dSVladimir Shulman * mechanism, core will be chosen according 7200553640dSVladimir Shulman * to user-level rps configuration. 7210553640dSVladimir Shulman */ 7220553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7230553640dSVladimir Shulman 724241804cbSVladimir Kondratiev skb_orphan(skb); 725241804cbSVladimir Kondratiev 72658527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 72758527421SVladimir Kondratiev rc = GRO_DROP; 72858527421SVladimir Kondratiev dev_kfree_skb(skb); 72958527421SVladimir Kondratiev stats->rx_replay++; 73058527421SVladimir Kondratiev goto stats; 73158527421SVladimir Kondratiev } 73258527421SVladimir Kondratiev 733e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 734c42da999SVladimir Kondratiev if (mcast) { 735c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 736c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 737c42da999SVladimir Kondratiev */ 738c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 739c42da999SVladimir Kondratiev } else { 740e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 741e00243faSLior David eth->h_dest); 7422be7d22fSVladimir Kondratiev 743c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 744c42da999SVladimir Kondratiev /* The destination station is associated to 745c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 746c42da999SVladimir Kondratiev * directly to it and do not pass it to local 747c42da999SVladimir Kondratiev * net stack. 748c42da999SVladimir Kondratiev */ 749c42da999SVladimir Kondratiev xmit_skb = skb; 750c42da999SVladimir Kondratiev skb = NULL; 751c42da999SVladimir Kondratiev } 752c42da999SVladimir Kondratiev } 753c42da999SVladimir Kondratiev } 754c42da999SVladimir Kondratiev if (xmit_skb) { 755c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 756c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 757c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 758c42da999SVladimir Kondratiev */ 759c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 760c42da999SVladimir Kondratiev xmit_skb->priority += 256; 761c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 762c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 763c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 764c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 765c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 766c42da999SVladimir Kondratiev } 767c42da999SVladimir Kondratiev 768c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 769c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 7705bd60982SLior David skb->dev = ndev; 771c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 772c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 773c42da999SVladimir Kondratiev len, gro_res_str[rc]); 774c42da999SVladimir Kondratiev } 77558527421SVladimir Kondratiev stats: 776c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 777b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 778b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 779b5998e6aSVladimir Kondratiev stats->rx_dropped++; 780b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 781b5998e6aSVladimir Kondratiev } else { 7822be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 783c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7842be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 785c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 786c42da999SVladimir Kondratiev if (mcast) 787c42da999SVladimir Kondratiev ndev->stats.multicast++; 788194b482bSVladimir Kondratiev } 7892be7d22fSVladimir Kondratiev } 7902be7d22fSVladimir Kondratiev 7912be7d22fSVladimir Kondratiev /** 7922be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7932be7d22fSVladimir Kondratiev * 794e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7952be7d22fSVladimir Kondratiev */ 796e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7972be7d22fSVladimir Kondratiev { 798e00243faSLior David struct net_device *ndev = wil->main_ndev; 799e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 80010590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 8012be7d22fSVladimir Kondratiev struct sk_buff *skb; 8022be7d22fSVladimir Kondratiev 80333c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8042be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8052be7d22fSVladimir Kondratiev return; 8062be7d22fSVladimir Kondratiev } 807af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 808e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 809e0287c4aSVladimir Kondratiev (*quota)--; 8102be7d22fSVladimir Kondratiev 811e00243faSLior David /* monitor is currently supported on main interface only */ 812e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8132be7d22fSVladimir Kondratiev skb->dev = ndev; 8142be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8152be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8162be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8172be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 818b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8192be7d22fSVladimir Kondratiev } else { 820b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8212be7d22fSVladimir Kondratiev } 8222be7d22fSVladimir Kondratiev } 8232be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8242be7d22fSVladimir Kondratiev } 8252be7d22fSVladimir Kondratiev 82652a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 82752a45702SLior David { 82852a45702SLior David wil->rx_buf_len = rx_large_buf ? 82952a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 83052a45702SLior David if (mtu_max > wil->rx_buf_len) { 83152a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 83252a45702SLior David * backward compatibility (mtu_max parameter was also used 83352a45702SLior David * to support receiving large packets) 83452a45702SLior David */ 83552a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 83652a45702SLior David wil->rx_buf_len = mtu_max; 83752a45702SLior David } 83852a45702SLior David } 83952a45702SLior David 84096c93589SGidon Studinski static int wil_rx_init(struct wil6210_priv *wil, u16 size) 8412be7d22fSVladimir Kondratiev { 84210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8432be7d22fSVladimir Kondratiev int rc; 8442be7d22fSVladimir Kondratiev 845af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8469cf10d62SVladimir Kondratiev 8478bf6adb9SVladimir Kondratiev if (vring->va) { 8488bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8498bf6adb9SVladimir Kondratiev return -EINVAL; 8508bf6adb9SVladimir Kondratiev } 8518bf6adb9SVladimir Kondratiev 85252a45702SLior David wil_rx_buf_len_init(wil); 85352a45702SLior David 854d3762b40SVladimir Kondratiev vring->size = size; 85596c93589SGidon Studinski vring->is_rx = true; 8562be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8572be7d22fSVladimir Kondratiev if (rc) 8582be7d22fSVladimir Kondratiev return rc; 8592be7d22fSVladimir Kondratiev 86047e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8612be7d22fSVladimir Kondratiev if (rc) 8622be7d22fSVladimir Kondratiev goto err_free; 8632be7d22fSVladimir Kondratiev 8642be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8652be7d22fSVladimir Kondratiev if (rc) 8662be7d22fSVladimir Kondratiev goto err_free; 8672be7d22fSVladimir Kondratiev 8682be7d22fSVladimir Kondratiev return 0; 8692be7d22fSVladimir Kondratiev err_free: 87096c93589SGidon Studinski wil_vring_free(wil, vring); 8712be7d22fSVladimir Kondratiev 8722be7d22fSVladimir Kondratiev return rc; 8732be7d22fSVladimir Kondratiev } 8742be7d22fSVladimir Kondratiev 87596c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 8762be7d22fSVladimir Kondratiev { 87710590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8782be7d22fSVladimir Kondratiev 879af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8809cf10d62SVladimir Kondratiev 8812acb4220SVladimir Kondratiev if (vring->va) 88296c93589SGidon Studinski wil_vring_free(wil, vring); 8832be7d22fSVladimir Kondratiev } 8842be7d22fSVladimir Kondratiev 8859202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 8869202d7b6SMaya Erez u32 len, int vring_index) 8879202d7b6SMaya Erez { 8889202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 8899202d7b6SMaya Erez 8909202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 8919202d7b6SMaya Erez d->dma.ip_length = 0; 8929202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 8939202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 8949202d7b6SMaya Erez d->dma.error = 0; 8959202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 8969202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 8979202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 8989202d7b6SMaya Erez d->mac.d[0] = 0; 8999202d7b6SMaya Erez d->mac.d[1] = 0; 9009202d7b6SMaya Erez d->mac.d[2] = 0; 9019202d7b6SMaya Erez d->mac.ucode_cmd = 0; 9029202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 9039202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 9049202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 9059202d7b6SMaya Erez 9069202d7b6SMaya Erez return 0; 9079202d7b6SMaya Erez } 9089202d7b6SMaya Erez 90996c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 910875e9439SMaya Erez { 911875e9439SMaya Erez spin_lock_bh(&txdata->lock); 912875e9439SMaya Erez txdata->dot1x_open = 0; 913875e9439SMaya Erez txdata->enabled = 0; 914875e9439SMaya Erez txdata->idle = 0; 915875e9439SMaya Erez txdata->last_idle = 0; 916875e9439SMaya Erez txdata->begin = 0; 917875e9439SMaya Erez txdata->agg_wsize = 0; 918875e9439SMaya Erez txdata->agg_timeout = 0; 919875e9439SMaya Erez txdata->agg_amsdu = 0; 920875e9439SMaya Erez txdata->addba_in_progress = false; 921e00243faSLior David txdata->mid = U8_MAX; 922875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 923875e9439SMaya Erez } 924875e9439SMaya Erez 92596c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9262be7d22fSVladimir Kondratiev int cid, int tid) 9272be7d22fSVladimir Kondratiev { 928e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9292be7d22fSVladimir Kondratiev int rc; 9302be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9312be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9322be7d22fSVladimir Kondratiev .vring_cfg = { 9332be7d22fSVladimir Kondratiev .tx_sw_ring = { 9349a06bec9SVladimir Kondratiev .max_mpdu_size = 935c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 936b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9372be7d22fSVladimir Kondratiev }, 9382be7d22fSVladimir Kondratiev .ringid = id, 939a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9402be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9412be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9422be7d22fSVladimir Kondratiev .to_resolution = 0, 9433277213fSVladimir Kondratiev .agg_max_wsize = 0, 9442be7d22fSVladimir Kondratiev .schd_params = { 9452be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9462be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9472be7d22fSVladimir Kondratiev }, 9482be7d22fSVladimir Kondratiev }, 9492be7d22fSVladimir Kondratiev }; 9502be7d22fSVladimir Kondratiev struct { 951b874ddecSLior David struct wmi_cmd_hdr wmi; 9522be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 953807b0860SAlexei Avshalom Lazar } __packed reply = { 954807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 955807b0860SAlexei Avshalom Lazar }; 95610590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 95710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 9582be7d22fSVladimir Kondratiev 959af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 960e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9619b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9629cf10d62SVladimir Kondratiev 9632be7d22fSVladimir Kondratiev if (vring->va) { 9642be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9652be7d22fSVladimir Kondratiev rc = -EINVAL; 9662be7d22fSVladimir Kondratiev goto out; 9672be7d22fSVladimir Kondratiev } 9682be7d22fSVladimir Kondratiev 969875e9439SMaya Erez wil_tx_data_init(txdata); 97096c93589SGidon Studinski vring->is_rx = false; 9712be7d22fSVladimir Kondratiev vring->size = size; 9722be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9732be7d22fSVladimir Kondratiev if (rc) 9742be7d22fSVladimir Kondratiev goto out; 9752be7d22fSVladimir Kondratiev 97610590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 97710590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 97893ae6d49SVladimir Kondratiev 9792be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9802be7d22fSVladimir Kondratiev 981e00243faSLior David if (!vif->privacy) 982230d8442SVladimir Kondratiev txdata->dot1x_open = true; 983e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9842be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9852be7d22fSVladimir Kondratiev if (rc) 9862be7d22fSVladimir Kondratiev goto out_free; 9872be7d22fSVladimir Kondratiev 988b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9892be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9902be7d22fSVladimir Kondratiev reply.cmd.status); 991c331997bSVladimir Kondratiev rc = -EINVAL; 9922be7d22fSVladimir Kondratiev goto out_free; 9932be7d22fSVladimir Kondratiev } 9942be7d22fSVladimir Kondratiev 995dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 996dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 997e00243faSLior David txdata->mid = vif->mid; 998097638a0SVladimir Kondratiev txdata->enabled = 1; 999dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1000dc90506fSMaya Erez 1001230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 10023a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1003097638a0SVladimir Kondratiev 10042be7d22fSVladimir Kondratiev return 0; 10052be7d22fSVladimir Kondratiev out_free: 1006875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1007230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1008230d8442SVladimir Kondratiev txdata->enabled = 0; 1009875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 101096c93589SGidon Studinski wil_vring_free(wil, vring); 101110590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 101210590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 10130916d9f2SMaya Erez 10142be7d22fSVladimir Kondratiev out: 10152be7d22fSVladimir Kondratiev 10162be7d22fSVladimir Kondratiev return rc; 10172be7d22fSVladimir Kondratiev } 10182be7d22fSVladimir Kondratiev 1019e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 102041d6b093SVladimir Kondratiev { 1021e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 102241d6b093SVladimir Kondratiev int rc; 102341d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 102441d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 102541d6b093SVladimir Kondratiev .vring_cfg = { 102641d6b093SVladimir Kondratiev .tx_sw_ring = { 102741d6b093SVladimir Kondratiev .max_mpdu_size = 102841d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 102941d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 103041d6b093SVladimir Kondratiev }, 103141d6b093SVladimir Kondratiev .ringid = id, 103241d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 103341d6b093SVladimir Kondratiev }, 103441d6b093SVladimir Kondratiev }; 103541d6b093SVladimir Kondratiev struct { 1036b874ddecSLior David struct wmi_cmd_hdr wmi; 103741d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1038807b0860SAlexei Avshalom Lazar } __packed reply = { 1039807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1040807b0860SAlexei Avshalom Lazar }; 104110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 104210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 104341d6b093SVladimir Kondratiev 1044af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 104541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10469b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 104741d6b093SVladimir Kondratiev 104841d6b093SVladimir Kondratiev if (vring->va) { 104941d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 105041d6b093SVladimir Kondratiev rc = -EINVAL; 105141d6b093SVladimir Kondratiev goto out; 105241d6b093SVladimir Kondratiev } 105341d6b093SVladimir Kondratiev 1054875e9439SMaya Erez wil_tx_data_init(txdata); 105596c93589SGidon Studinski vring->is_rx = false; 105641d6b093SVladimir Kondratiev vring->size = size; 105741d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 105841d6b093SVladimir Kondratiev if (rc) 105941d6b093SVladimir Kondratiev goto out; 106041d6b093SVladimir Kondratiev 106110590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 106210590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 106341d6b093SVladimir Kondratiev 106441d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 106541d6b093SVladimir Kondratiev 1066e00243faSLior David if (!vif->privacy) 1067230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1068e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1069e00243faSLior David &cmd, sizeof(cmd), 107041d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 107141d6b093SVladimir Kondratiev if (rc) 107241d6b093SVladimir Kondratiev goto out_free; 107341d6b093SVladimir Kondratiev 107441d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 107541d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 107641d6b093SVladimir Kondratiev reply.cmd.status); 107741d6b093SVladimir Kondratiev rc = -EINVAL; 107841d6b093SVladimir Kondratiev goto out_free; 107941d6b093SVladimir Kondratiev } 108041d6b093SVladimir Kondratiev 1081dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1082dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1083e00243faSLior David txdata->mid = vif->mid; 108441d6b093SVladimir Kondratiev txdata->enabled = 1; 1085dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 108641d6b093SVladimir Kondratiev 108741d6b093SVladimir Kondratiev return 0; 108841d6b093SVladimir Kondratiev out_free: 1089875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1090230d8442SVladimir Kondratiev txdata->enabled = 0; 1091230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1092875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 109396c93589SGidon Studinski wil_vring_free(wil, vring); 109441d6b093SVladimir Kondratiev out: 109541d6b093SVladimir Kondratiev 109641d6b093SVladimir Kondratiev return rc; 109741d6b093SVladimir Kondratiev } 109841d6b093SVladimir Kondratiev 109910590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1100e00243faSLior David struct wil6210_vif *vif, 11012be7d22fSVladimir Kondratiev struct sk_buff *skb) 11022be7d22fSVladimir Kondratiev { 11033df2cd36SVladimir Kondratiev int i; 11043df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1105e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 110696c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 11072be7d22fSVladimir Kondratiev 11083df2cd36SVladimir Kondratiev if (cid < 0) 11093df2cd36SVladimir Kondratiev return NULL; 11103df2cd36SVladimir Kondratiev 11113df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 111296c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 111310590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 111410590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1115230d8442SVladimir Kondratiev continue; 111610590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 111710590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 111810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11198fe59627SVladimir Kondratiev 1120af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1121af3db60aSLazar Alexei eth->h_dest, i); 1122b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11232be7d22fSVladimir Kondratiev return v; 11243df2cd36SVladimir Kondratiev } else { 1125af3db60aSLazar Alexei wil_dbg_txrx(wil, 1126af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1127af3db60aSLazar Alexei i); 11283df2cd36SVladimir Kondratiev return NULL; 11293df2cd36SVladimir Kondratiev } 11303df2cd36SVladimir Kondratiev } 11313df2cd36SVladimir Kondratiev } 11322be7d22fSVladimir Kondratiev 11332be7d22fSVladimir Kondratiev return NULL; 11342be7d22fSVladimir Kondratiev } 11352be7d22fSVladimir Kondratiev 11369202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 11379202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 113854ed90a8SVladimir Kondratiev 113910590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1140e00243faSLior David struct wil6210_vif *vif, 114154ed90a8SVladimir Kondratiev struct sk_buff *skb) 114254ed90a8SVladimir Kondratiev { 114310590c6aSGidon Studinski struct wil_ring *ring; 114454ed90a8SVladimir Kondratiev int i; 114554ed90a8SVladimir Kondratiev u8 cid; 114610590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 114796c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 114854ed90a8SVladimir Kondratiev 114954ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 115054ed90a8SVladimir Kondratiev * for the AP we connected to. 1151230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 115254ed90a8SVladimir Kondratiev */ 115396c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 115410590c6aSGidon Studinski ring = &wil->ring_tx[i]; 115510590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 115610590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 115754ed90a8SVladimir Kondratiev continue; 115854ed90a8SVladimir Kondratiev 115910590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 116041d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116141d6b093SVladimir Kondratiev continue; 116241d6b093SVladimir Kondratiev 116310590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 116410590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1165230d8442SVladimir Kondratiev continue; 116654ed90a8SVladimir Kondratiev 116754ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 116854ed90a8SVladimir Kondratiev 116910590c6aSGidon Studinski return ring; 117054ed90a8SVladimir Kondratiev } 117154ed90a8SVladimir Kondratiev 117210590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 117354ed90a8SVladimir Kondratiev 117454ed90a8SVladimir Kondratiev return NULL; 117554ed90a8SVladimir Kondratiev } 117654ed90a8SVladimir Kondratiev 117770812421SVladimir Kondratiev /* Use one of 2 strategies: 117870812421SVladimir Kondratiev * 117970812421SVladimir Kondratiev * 1. New (real broadcast): 118070812421SVladimir Kondratiev * use dedicated broadcast vring 118170812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 118270812421SVladimir Kondratiev * Find 1-st vring and return it; 118370812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 118470812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 118570812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 118670812421SVladimir Kondratiev * - for PBSS 118770812421SVladimir Kondratiev */ 118810590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1189e00243faSLior David struct wil6210_vif *vif, 1190fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1191fb3cac57SVladimir Kondratiev { 119210590c6aSGidon Studinski struct wil_ring *v; 119310590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 119410590c6aSGidon Studinski int i = vif->bcast_ring; 1195fb3cac57SVladimir Kondratiev 119641d6b093SVladimir Kondratiev if (i < 0) 119741d6b093SVladimir Kondratiev return NULL; 119810590c6aSGidon Studinski v = &wil->ring_tx[i]; 119910590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1200b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1201fb3cac57SVladimir Kondratiev return NULL; 120210590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 120310590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1204230d8442SVladimir Kondratiev return NULL; 1205fb3cac57SVladimir Kondratiev 1206fb3cac57SVladimir Kondratiev return v; 1207fb3cac57SVladimir Kondratiev } 1208fb3cac57SVladimir Kondratiev 120970812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 121070812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 121170812421SVladimir Kondratiev { 121270812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 121310590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 121470812421SVladimir Kondratiev 121570812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 121670812421SVladimir Kondratiev } 121770812421SVladimir Kondratiev 121810590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1219e00243faSLior David struct wil6210_vif *vif, 122070812421SVladimir Kondratiev struct sk_buff *skb) 122170812421SVladimir Kondratiev { 122210590c6aSGidon Studinski struct wil_ring *v, *v2; 122370812421SVladimir Kondratiev struct sk_buff *skb2; 122470812421SVladimir Kondratiev int i; 122570812421SVladimir Kondratiev u8 cid; 122670812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 122770812421SVladimir Kondratiev char *src = eth->h_source; 122810590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 122996c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 123070812421SVladimir Kondratiev 123170812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 123296c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 123310590c6aSGidon Studinski v = &wil->ring_tx[i]; 123410590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1235e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 123670812421SVladimir Kondratiev continue; 123770812421SVladimir Kondratiev 123810590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 123970812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 124070812421SVladimir Kondratiev continue; 124110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 124210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 124370812421SVladimir Kondratiev continue; 124470812421SVladimir Kondratiev 124570812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 124670812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 124770812421SVladimir Kondratiev continue; 124870812421SVladimir Kondratiev 124970812421SVladimir Kondratiev goto found; 125070812421SVladimir Kondratiev } 125170812421SVladimir Kondratiev 125270812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 125370812421SVladimir Kondratiev 125470812421SVladimir Kondratiev return NULL; 125570812421SVladimir Kondratiev 125670812421SVladimir Kondratiev found: 125770812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 125870812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 125970812421SVladimir Kondratiev 126070812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 126170812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 126210590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 126310590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1264e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 126570812421SVladimir Kondratiev continue; 126610590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 126770812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 126870812421SVladimir Kondratiev continue; 126910590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 127010590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 127170812421SVladimir Kondratiev continue; 127270812421SVladimir Kondratiev 127370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 127470812421SVladimir Kondratiev continue; 127570812421SVladimir Kondratiev 127670812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 127770812421SVladimir Kondratiev if (skb2) { 127870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 127970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 12809202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 128170812421SVladimir Kondratiev } else { 128270812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 128370812421SVladimir Kondratiev } 128470812421SVladimir Kondratiev } 128570812421SVladimir Kondratiev 128670812421SVladimir Kondratiev return v; 128770812421SVladimir Kondratiev } 128870812421SVladimir Kondratiev 1289c236658fSVladimir Kondratiev static inline 1290c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1291c236658fSVladimir Kondratiev { 12923d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1293c236658fSVladimir Kondratiev } 1294c236658fSVladimir Kondratiev 12953d4bde15SVladimir Kondratiev /** 12963d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 12973d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 12983d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 12993d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13003d4bde15SVladimir Kondratiev */ 13013d4bde15SVladimir Kondratiev 13023d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13033d4bde15SVladimir Kondratiev struct sk_buff *skb, 13043d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13053d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1306504937d4SKirshenbaum Erez { 13073d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13083d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13093d4bde15SVladimir Kondratiev 13103d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13113d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13123d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13133d4bde15SVladimir Kondratiev 13143d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13153d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13163d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13173d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13183d4bde15SVladimir Kondratiev 13193d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13203d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13213d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13223d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13233d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13243d4bde15SVladimir Kondratiev } 13253d4bde15SVladimir Kondratiev 13263d4bde15SVladimir Kondratiev /** 13273d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13283d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13293d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13303d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13313d4bde15SVladimir Kondratiev * 13323d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13333d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13343d4bde15SVladimir Kondratiev */ 13353d4bde15SVladimir Kondratiev 13363d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13373d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1338504937d4SKirshenbaum Erez int protocol; 1339504937d4SKirshenbaum Erez 1340504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1341504937d4SKirshenbaum Erez return 0; 1342504937d4SKirshenbaum Erez 1343df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1344df2d08eeSVladimir Kondratiev 1345504937d4SKirshenbaum Erez switch (skb->protocol) { 1346504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1347504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1348df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1349504937d4SKirshenbaum Erez break; 1350504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1351504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1352504937d4SKirshenbaum Erez break; 1353504937d4SKirshenbaum Erez default: 1354504937d4SKirshenbaum Erez return -EINVAL; 1355504937d4SKirshenbaum Erez } 1356504937d4SKirshenbaum Erez 1357504937d4SKirshenbaum Erez switch (protocol) { 1358504937d4SKirshenbaum Erez case IPPROTO_TCP: 1359504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1360504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1361504937d4SKirshenbaum Erez d->dma.d0 |= 1362504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1363504937d4SKirshenbaum Erez break; 1364504937d4SKirshenbaum Erez case IPPROTO_UDP: 1365504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1366504937d4SKirshenbaum Erez d->dma.d0 |= 1367504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1368504937d4SKirshenbaum Erez break; 1369504937d4SKirshenbaum Erez default: 1370504937d4SKirshenbaum Erez return -EINVAL; 1371504937d4SKirshenbaum Erez } 1372504937d4SKirshenbaum Erez 1373504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1374504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1375504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1376504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1377504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1378504937d4SKirshenbaum Erez 1379504937d4SKirshenbaum Erez return 0; 1380504937d4SKirshenbaum Erez } 1381504937d4SKirshenbaum Erez 13823d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13833d4bde15SVladimir Kondratiev { 13843d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13853d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13863d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13873d4bde15SVladimir Kondratiev } 13883d4bde15SVladimir Kondratiev 13893d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13903d4bde15SVladimir Kondratiev { 13913d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13923d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13933d4bde15SVladimir Kondratiev } 13943d4bde15SVladimir Kondratiev 1395e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 139610590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 13973d4bde15SVladimir Kondratiev { 13983d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 13993d4bde15SVladimir Kondratiev 14003d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14013d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14023d4bde15SVladimir Kondratiev *_first_desc = NULL; 14033d4bde15SVladimir Kondratiev 14043d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14053d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14063d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14073d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14083d4bde15SVladimir Kondratiev 14093d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14103d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14113d4bde15SVladimir Kondratiev 14123d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14133d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14143d4bde15SVladimir Kondratiev 14153d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 141610590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14173d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14183d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14193d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14203d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 142110590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 142210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14233d4bde15SVladimir Kondratiev uint i = swhead; 14243d4bde15SVladimir Kondratiev dma_addr_t pa; 14253d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14263d4bde15SVladimir Kondratiev int rem_data = mss; 14273d4bde15SVladimir Kondratiev int lenmss; 14283d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14293d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14303d4bde15SVladimir Kondratiev bool is_ipv4; 14313d4bde15SVladimir Kondratiev int tcp_hdr_len; 14323d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14333d4bde15SVladimir Kondratiev int gso_type; 1434e3d2ed94SHamad Kadmany int rc = -EINVAL; 14353d4bde15SVladimir Kondratiev 1436af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1437af3db60aSLazar Alexei vring_index); 14383d4bde15SVladimir Kondratiev 14393d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14403d4bde15SVladimir Kondratiev return -EINVAL; 14413d4bde15SVladimir Kondratiev 14423d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14433d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14443d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14453d4bde15SVladimir Kondratiev * this is the initial check only. 14463d4bde15SVladimir Kondratiev */ 14473d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14483d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14493d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14503d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14513d4bde15SVladimir Kondratiev return -ENOMEM; 14523d4bde15SVladimir Kondratiev } 14533d4bde15SVladimir Kondratiev 14543d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14553d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14563d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14573d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14583d4bde15SVladimir Kondratiev 14593d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14603d4bde15SVladimir Kondratiev switch (gso_type) { 14613d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14623d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14633d4bde15SVladimir Kondratiev * as required by the offloading doc 14643d4bde15SVladimir Kondratiev */ 14653d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14663d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14673d4bde15SVladimir Kondratiev is_ipv4 = true; 14683d4bde15SVladimir Kondratiev break; 14693d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14703d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14713d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14723d4bde15SVladimir Kondratiev is_ipv4 = false; 14733d4bde15SVladimir Kondratiev break; 14743d4bde15SVladimir Kondratiev default: 14753d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 14763d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14773d4bde15SVladimir Kondratiev */ 14783d4bde15SVladimir Kondratiev return -EINVAL; 14793d4bde15SVladimir Kondratiev } 14803d4bde15SVladimir Kondratiev 14813d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14823d4bde15SVladimir Kondratiev return -EINVAL; 14833d4bde15SVladimir Kondratiev 14843d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14853d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14863d4bde15SVladimir Kondratiev */ 14873d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14883d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14893d4bde15SVladimir Kondratiev 149010590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 14913d4bde15SVladimir Kondratiev 14923d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14933d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 14943d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 14953d4bde15SVladimir Kondratiev goto err_exit; 14963d4bde15SVladimir Kondratiev } 14973d4bde15SVladimir Kondratiev 14989202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 14999202d7b6SMaya Erez hdrlen, vring_index); 15003d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15013d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15023d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15033d4bde15SVladimir Kondratiev 15043d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15053d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15063d4bde15SVladimir Kondratiev 15073d4bde15SVladimir Kondratiev descs_used++; 15083d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15093d4bde15SVladimir Kondratiev 15103d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15113d4bde15SVladimir Kondratiev if (headlen) { 15123d4bde15SVladimir Kondratiev len = headlen; 15133d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15143d4bde15SVladimir Kondratiev len); 15153d4bde15SVladimir Kondratiev } else { 15163d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15173d4bde15SVladimir Kondratiev len = frag->size; 15183d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15193d4bde15SVladimir Kondratiev } 15203d4bde15SVladimir Kondratiev 15213d4bde15SVladimir Kondratiev while (len) { 15223d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15233d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15243d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15253d4bde15SVladimir Kondratiev 15263d4bde15SVladimir Kondratiev if (descs_used == avail) { 1527e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1528e3d2ed94SHamad Kadmany rc = -ENOMEM; 1529e3d2ed94SHamad Kadmany goto mem_error; 15303d4bde15SVladimir Kondratiev } 15313d4bde15SVladimir Kondratiev 15323d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15333d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15343d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15353d4bde15SVladimir Kondratiev 15363d4bde15SVladimir Kondratiev if (!headlen) { 15373d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15383d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15393d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15403d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15413d4bde15SVladimir Kondratiev } else { 15423d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15433d4bde15SVladimir Kondratiev skb->data + 15443d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15453d4bde15SVladimir Kondratiev lenmss, 15463d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15473d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15483d4bde15SVladimir Kondratiev headlen -= lenmss; 15493d4bde15SVladimir Kondratiev } 15503d4bde15SVladimir Kondratiev 1551e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1552e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1553e3d2ed94SHamad Kadmany goto mem_error; 1554e3d2ed94SHamad Kadmany } 15553d4bde15SVladimir Kondratiev 155610590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 15573d4bde15SVladimir Kondratiev 15583d4bde15SVladimir Kondratiev if (!_first_desc) { 15593d4bde15SVladimir Kondratiev _first_desc = _desc; 15603d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15613d4bde15SVladimir Kondratiev d = first_desc; 15623d4bde15SVladimir Kondratiev } else { 15633d4bde15SVladimir Kondratiev d = &desc_mem; 15643d4bde15SVladimir Kondratiev } 15653d4bde15SVladimir Kondratiev 15669202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 15679202d7b6SMaya Erez pa, lenmss, vring_index); 15683d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15693d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15703d4bde15SVladimir Kondratiev skb_net_hdr_len); 15713d4bde15SVladimir Kondratiev 15723d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15733d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15743d4bde15SVladimir Kondratiev 15753d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15763d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 15773d4bde15SVladimir Kondratiev len -= lenmss; 15783d4bde15SVladimir Kondratiev rem_data -= lenmss; 15793d4bde15SVladimir Kondratiev 15803d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15813d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15823d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15833d4bde15SVladimir Kondratiev 15843d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15853d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15863d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15873d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15883d4bde15SVladimir Kondratiev * release 15893d4bde15SVladimir Kondratiev */ 15903d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15913d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15923d4bde15SVladimir Kondratiev sg_desc_cnt + 15933d4bde15SVladimir Kondratiev 1); 15943d4bde15SVladimir Kondratiev hdr_compensation_need = false; 15953d4bde15SVladimir Kondratiev } else { 15963d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15973d4bde15SVladimir Kondratiev sg_desc_cnt); 15983d4bde15SVladimir Kondratiev } 15993d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16003d4bde15SVladimir Kondratiev 16013d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16023d4bde15SVladimir Kondratiev 16033d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16043d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16053d4bde15SVladimir Kondratiev * it twice 16063d4bde15SVladimir Kondratiev */ 16073d4bde15SVladimir Kondratiev if (first_desc != d) 16083d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16093d4bde15SVladimir Kondratiev 16103d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16113d4bde15SVladimir Kondratiev * of this TS processing 16123d4bde15SVladimir Kondratiev */ 16133d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16143d4bde15SVladimir Kondratiev *_desc = *d; 16153d4bde15SVladimir Kondratiev 16163d4bde15SVladimir Kondratiev rem_data = mss; 16173d4bde15SVladimir Kondratiev _first_desc = NULL; 16183d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16193d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16203d4bde15SVladimir Kondratiev *_desc = *d; 16213d4bde15SVladimir Kondratiev } 16223d4bde15SVladimir Kondratiev } 16233d4bde15SVladimir Kondratiev 16243d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16253d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16263d4bde15SVladimir Kondratiev */ 16273d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16283d4bde15SVladimir Kondratiev d = first_desc; 16293d4bde15SVladimir Kondratiev 16303d4bde15SVladimir Kondratiev /* Last data descriptor */ 16313d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16323d4bde15SVladimir Kondratiev *_desc = *d; 16333d4bde15SVladimir Kondratiev 16343d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16353d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16363d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16373d4bde15SVladimir Kondratiev 16383d4bde15SVladimir Kondratiev /* hold reference to skb 16393d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16403d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16413d4bde15SVladimir Kondratiev */ 16423d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16433d4bde15SVladimir Kondratiev 16443d4bde15SVladimir Kondratiev /* performance monitoring */ 164510590c6aSGidon Studinski used = wil_ring_used_tx(vring); 164610590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 16473d4bde15SVladimir Kondratiev used, used + descs_used)) { 16483d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16493d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16503d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16513d4bde15SVladimir Kondratiev } 16523d4bde15SVladimir Kondratiev 1653eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1654eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1655eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1656eb26cff1SMaya Erez * skb before it was completed. 1657eb26cff1SMaya Erez */ 1658eb26cff1SMaya Erez wmb(); 1659eb26cff1SMaya Erez 16603d4bde15SVladimir Kondratiev /* advance swhead */ 166110590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1662e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16633d4bde15SVladimir Kondratiev 16643d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16653d4bde15SVladimir Kondratiev * committing them to HW 16663d4bde15SVladimir Kondratiev */ 16673d4bde15SVladimir Kondratiev wmb(); 16683d4bde15SVladimir Kondratiev 1669b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16703d4bde15SVladimir Kondratiev return 0; 16713d4bde15SVladimir Kondratiev 1672e3d2ed94SHamad Kadmany mem_error: 16733d4bde15SVladimir Kondratiev while (descs_used > 0) { 16743d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16753d4bde15SVladimir Kondratiev 1676a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 167710590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 167810590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 16793d4bde15SVladimir Kondratiev *d = *_desc; 16803d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16813d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16829202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 16833d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16843d4bde15SVladimir Kondratiev descs_used--; 16853d4bde15SVladimir Kondratiev } 16863d4bde15SVladimir Kondratiev err_exit: 1687e3d2ed94SHamad Kadmany return rc; 16883d4bde15SVladimir Kondratiev } 16893d4bde15SVladimir Kondratiev 16909202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 16919202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 16922be7d22fSVladimir Kondratiev { 16932be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 169468ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 169568ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 16969202d7b6SMaya Erez u32 swhead = ring->swhead; 16979202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 16982be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1699504937d4SKirshenbaum Erez uint f = 0; 17009202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 17019202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 17022be7d22fSVladimir Kondratiev uint i = swhead; 17032be7d22fSVladimir Kondratiev dma_addr_t pa; 17040436fd9aSVladimir Shulman int used; 17059202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 170641d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17072be7d22fSVladimir Kondratiev 170810590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 17099202d7b6SMaya Erez skb->len, ring_index, nr_frags); 17102be7d22fSVladimir Kondratiev 17115933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17125933a06dSVladimir Kondratiev return -EINVAL; 17135933a06dSVladimir Kondratiev 171433c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 171570801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17165b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17179202d7b6SMaya Erez ring_index, 1 + nr_frags); 17182be7d22fSVladimir Kondratiev return -ENOMEM; 17192be7d22fSVladimir Kondratiev } 17209202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17212be7d22fSVladimir Kondratiev 17228fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17232be7d22fSVladimir Kondratiev 17249202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 17255b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17267743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17272be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17282be7d22fSVladimir Kondratiev 17292be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17302be7d22fSVladimir Kondratiev return -EINVAL; 17319202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 17322be7d22fSVladimir Kondratiev /* 1-st segment */ 17339202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 17349202d7b6SMaya Erez ring_index); 173541d6b093SVladimir Kondratiev if (unlikely(mcast)) { 173641d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1737230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 173841d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 173941d6b093SVladimir Kondratiev } 1740504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17413d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17425b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 17439202d7b6SMaya Erez ring_index); 1744504937d4SKirshenbaum Erez goto dma_error; 1745504937d4SKirshenbaum Erez } 1746504937d4SKirshenbaum Erez 17479202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 17483d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 174968ada71eSVladimir Kondratiev 17502be7d22fSVladimir Kondratiev /* middle segments */ 1751504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17522be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17532be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17542be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17558fe59627SVladimir Kondratiev 1756e59d16c0SVladimir Kondratiev *_d = *d; 17579202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 17585b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17595b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17609202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 17619202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17622be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17632be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1764e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1765e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 17669202d7b6SMaya Erez ring_index); 17672be7d22fSVladimir Kondratiev goto dma_error; 1768e3d2ed94SHamad Kadmany } 17699202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 17709202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 17719202d7b6SMaya Erez pa, len, ring_index); 1772c236658fSVladimir Kondratiev /* no need to check return code - 1773c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1774c236658fSVladimir Kondratiev * it will succeed here too 1775c236658fSVladimir Kondratiev */ 17763d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17772be7d22fSVladimir Kondratiev } 17782be7d22fSVladimir Kondratiev /* for the last seg only */ 17792be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1780668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17812be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 178268ada71eSVladimir Kondratiev *_d = *d; 17839202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 17845b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17855b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17862be7d22fSVladimir Kondratiev 17876cdadd4dSVladimir Kondratiev /* hold reference to skb 17886cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17896cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17906cdadd4dSVladimir Kondratiev */ 17919202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 17926cdadd4dSVladimir Kondratiev 17930436fd9aSVladimir Shulman /* performance monitoring */ 17949202d7b6SMaya Erez used = wil_ring_used_tx(ring); 179510590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 17960436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 17977c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17980436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17999202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 18000436fd9aSVladimir Shulman } 18017c0acf86SVladimir Kondratiev 1802eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1803eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1804eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1805eb26cff1SMaya Erez * skb before it was completed. 1806eb26cff1SMaya Erez */ 1807eb26cff1SMaya Erez wmb(); 1808eb26cff1SMaya Erez 18092be7d22fSVladimir Kondratiev /* advance swhead */ 18109202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 18119202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 18129202d7b6SMaya Erez ring->swhead); 18139202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 18143d4bde15SVladimir Kondratiev 18153d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18163d4bde15SVladimir Kondratiev * committing them to HW 18173d4bde15SVladimir Kondratiev */ 18183d4bde15SVladimir Kondratiev wmb(); 18193d4bde15SVladimir Kondratiev 18209202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 18212be7d22fSVladimir Kondratiev 18222be7d22fSVladimir Kondratiev return 0; 18232be7d22fSVladimir Kondratiev dma_error: 18242be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1825c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1826c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1827c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18287e594444SVladimir Kondratiev 18299202d7b6SMaya Erez i = (swhead + f) % ring->size; 18309202d7b6SMaya Erez ctx = &ring->ctx[i]; 18319202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 183268ada71eSVladimir Kondratiev *d = *_d; 183368ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18349202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 18359202d7b6SMaya Erez (union wil_tx_desc *)d, 18369202d7b6SMaya Erez ctx); 1837f88f113aSVladimir Kondratiev 1838f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18392be7d22fSVladimir Kondratiev } 18402be7d22fSVladimir Kondratiev 18412be7d22fSVladimir Kondratiev return -EINVAL; 18422be7d22fSVladimir Kondratiev } 18432be7d22fSVladimir Kondratiev 18449202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 18459202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 18465933a06dSVladimir Kondratiev { 18479202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 184810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 18495933a06dSVladimir Kondratiev int rc; 18505933a06dSVladimir Kondratiev 18515933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18523d4bde15SVladimir Kondratiev 1853fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1854fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1855fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1856fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1857fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1858fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1859fe9ee51eSMaya Erez return -EINVAL; 1860fe9ee51eSMaya Erez } 1861fe9ee51eSMaya Erez 18629202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 18639202d7b6SMaya Erez (wil, vif, ring, skb); 18643d4bde15SVladimir Kondratiev 18655933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 18663d4bde15SVladimir Kondratiev 18675933a06dSVladimir Kondratiev return rc; 18685933a06dSVladimir Kondratiev } 18695933a06dSVladimir Kondratiev 1870f9e3033fSDedy Lansky /** 1871f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 18725bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1873f9e3033fSDedy Lansky * 1874f9e3033fSDedy Lansky * This function does one of two checks: 1875f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1876f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1877f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1878f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1879f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1880f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1881f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1882f9e3033fSDedy Lansky * 1883f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1884f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1885f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1886f9e3033fSDedy Lansky */ 1887f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 18885bd60982SLior David struct wil6210_vif *vif, 188910590c6aSGidon Studinski struct wil_ring *ring, 1890f9e3033fSDedy Lansky bool check_stop) 1891f9e3033fSDedy Lansky { 1892f9e3033fSDedy Lansky int i; 1893f9e3033fSDedy Lansky 18945bd60982SLior David if (unlikely(!vif)) 18955bd60982SLior David return; 1896f9e3033fSDedy Lansky 189710590c6aSGidon Studinski if (ring) 18985bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 189910590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19005bd60982SLior David vif->net_queue_stopped); 19015bd60982SLior David else 19025bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19035bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19045bd60982SLior David 19055bd60982SLior David if (check_stop == vif->net_queue_stopped) 1906f9e3033fSDedy Lansky /* net queues already in desired state */ 1907f9e3033fSDedy Lansky return; 1908f9e3033fSDedy Lansky 1909f9e3033fSDedy Lansky if (check_stop) { 191010590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1911f9e3033fSDedy Lansky /* not enough room in the vring */ 19125bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19135bd60982SLior David vif->net_queue_stopped = true; 1914f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1915f9e3033fSDedy Lansky } 1916f9e3033fSDedy Lansky return; 1917f9e3033fSDedy Lansky } 1918f9e3033fSDedy Lansky 1919fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1920fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1921fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1922fe9ee51eSMaya Erez return; 1923fe9ee51eSMaya Erez 1924f9e3033fSDedy Lansky /* check wake */ 1925f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 192610590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 192710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 1928f9e3033fSDedy Lansky 192910590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 193010590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 1931f9e3033fSDedy Lansky continue; 1932f9e3033fSDedy Lansky 193310590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 193410590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 193510590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 1936f9e3033fSDedy Lansky return; 1937f9e3033fSDedy Lansky } 1938f9e3033fSDedy Lansky } 1939f9e3033fSDedy Lansky 194010590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 194110590c6aSGidon Studinski /* enough room in the ring */ 1942f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 19435bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 19445bd60982SLior David vif->net_queue_stopped = false; 1945f9e3033fSDedy Lansky } 1946f9e3033fSDedy Lansky } 1947f9e3033fSDedy Lansky 19485bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 194910590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 1950f9e3033fSDedy Lansky { 1951f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 195210590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 1953f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1954f9e3033fSDedy Lansky } 1955f9e3033fSDedy Lansky 19565bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 195710590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 1958f9e3033fSDedy Lansky { 1959f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 196010590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 1961f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1962f9e3033fSDedy Lansky } 1963f9e3033fSDedy Lansky 19642be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19652be7d22fSVladimir Kondratiev { 1966e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 1967e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 19683df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 196941d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 19709202d7b6SMaya Erez struct wil_ring *ring; 1971aa27deaaSVladimir Kondratiev static bool pr_once_fw; 19722be7d22fSVladimir Kondratiev int rc; 19732be7d22fSVladimir Kondratiev 1974af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 197533c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1976aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 19772be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1978aa27deaaSVladimir Kondratiev pr_once_fw = true; 1979aa27deaaSVladimir Kondratiev } 19802be7d22fSVladimir Kondratiev goto drop; 19812be7d22fSVladimir Kondratiev } 19825bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 19835bd60982SLior David wil_dbg_ratelimited(wil, 19845bd60982SLior David "VIF not connected, packet dropped\n"); 19852be7d22fSVladimir Kondratiev goto drop; 19862be7d22fSVladimir Kondratiev } 1987e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 19882be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 19892be7d22fSVladimir Kondratiev goto drop; 19902be7d22fSVladimir Kondratiev } 1991aa27deaaSVladimir Kondratiev pr_once_fw = false; 1992d58db4e4SVladimir Kondratiev 19932be7d22fSVladimir Kondratiev /* find vring */ 1994e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 1995a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 19969202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 1997a895cb8bSLior David } else if (bcast) { 1998e00243faSLior David if (vif->pbss) 1999a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2000a895cb8bSLior David * all stations VRINGs 2001a895cb8bSLior David */ 20029202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2003e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2004a895cb8bSLior David /* AP has a dedicated bcast VRING */ 20059202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2006a895cb8bSLior David else 2007a895cb8bSLior David /* unexpected combination, fallback to duplicating 2008a895cb8bSLior David * the skb in all stations VRINGs 2009a895cb8bSLior David */ 20109202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2011a895cb8bSLior David } else { 2012a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 20139202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 201454ed90a8SVladimir Kondratiev } 20159202d7b6SMaya Erez if (unlikely(!ring)) { 201610590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20172be7d22fSVladimir Kondratiev goto drop; 20182be7d22fSVladimir Kondratiev } 20192be7d22fSVladimir Kondratiev /* set up vring entry */ 20209202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2021d58db4e4SVladimir Kondratiev 20222be7d22fSVladimir Kondratiev switch (rc) { 20232be7d22fSVladimir Kondratiev case 0: 2024f9e3033fSDedy Lansky /* shall we stop net queues? */ 20259202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2026795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20272be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20282be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20292be7d22fSVladimir Kondratiev case -ENOMEM: 20302be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20312be7d22fSVladimir Kondratiev default: 2032afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20332be7d22fSVladimir Kondratiev } 20342be7d22fSVladimir Kondratiev drop: 20352be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20362be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20372be7d22fSVladimir Kondratiev 20382be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20392be7d22fSVladimir Kondratiev } 20402be7d22fSVladimir Kondratiev 20412be7d22fSVladimir Kondratiev /** 20422be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 20432be7d22fSVladimir Kondratiev * 2044e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2045e0287c4aSVladimir Kondratiev * 20462be7d22fSVladimir Kondratiev * Safe to call from IRQ 20472be7d22fSVladimir Kondratiev */ 20485bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 20492be7d22fSVladimir Kondratiev { 20505bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 20515bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 20522be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 205310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 205410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2055e0287c4aSVladimir Kondratiev int done = 0; 205610590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 205741d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2058c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20590436fd9aSVladimir Shulman int used_before_complete; 20600436fd9aSVladimir Shulman int used_new; 20612be7d22fSVladimir Kondratiev 206233c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 20632be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2064e0287c4aSVladimir Kondratiev return 0; 20652be7d22fSVladimir Kondratiev } 20662be7d22fSVladimir Kondratiev 206733c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2068097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2069097638a0SVladimir Kondratiev return 0; 2070097638a0SVladimir Kondratiev } 2071097638a0SVladimir Kondratiev 2072af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 20732be7d22fSVladimir Kondratiev 207410590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 20750436fd9aSVladimir Shulman 207641d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 207741d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 207841d6b093SVladimir Kondratiev 207910590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2080c236658fSVladimir Kondratiev int new_swtail; 2081c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2082c236658fSVladimir Kondratiev /** 2083c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 20843d4bde15SVladimir Kondratiev * last fragment. look for it. 20853d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2086c236658fSVladimir Kondratiev */ 2087c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2088c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2089c236658fSVladimir Kondratiev 209010590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 209133c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2092c236658fSVladimir Kondratiev break; 2093c236658fSVladimir Kondratiev 2094c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2095c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 20964de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 20977e594444SVladimir Kondratiev u16 dmalen; 209876dfa4b7SVladimir Kondratiev struct sk_buff *skb; 209976dfa4b7SVladimir Kondratiev 210076dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 210176dfa4b7SVladimir Kondratiev skb = ctx->skb; 210210590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 21034de41befSVladimir Kondratiev 210468ada71eSVladimir Kondratiev *d = *_d; 21054de41befSVladimir Kondratiev 21067e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 210798658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 210898658095SVladimir Kondratiev d->dma.error); 21097743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21105b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21115b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21125b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21135b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21142be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21152be7d22fSVladimir Kondratiev 21169202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21179202d7b6SMaya Erez (union wil_tx_desc *)d, 21189202d7b6SMaya Erez ctx); 2119f88f113aSVladimir Kondratiev 21202be7d22fSVladimir Kondratiev if (skb) { 212133c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2122795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2123795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 212441d6b093SVladimir Kondratiev if (stats) { 212541d6b093SVladimir Kondratiev stats->tx_packets++; 2126c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 212741d6b093SVladimir Kondratiev } 2128795ce734SVladimir Kondratiev } else { 2129795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 213041d6b093SVladimir Kondratiev if (stats) 2131c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2132795ce734SVladimir Kondratiev } 2133713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21342be7d22fSVladimir Kondratiev } 2135f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2136eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 213710590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2138eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2139eb26cff1SMaya Erez * is completed. 2140eb26cff1SMaya Erez */ 2141eb26cff1SMaya Erez wmb(); 2142c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 214303269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 214403269c65SVladimir Kondratiev * so hardware will not try to process this desc., 214503269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 214603269c65SVladimir Kondratiev */ 214710590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2148e0287c4aSVladimir Kondratiev done++; 21492be7d22fSVladimir Kondratiev } 2150c236658fSVladimir Kondratiev } 215167c3e1b4SVladimir Kondratiev 21520436fd9aSVladimir Shulman /* performance monitoring */ 215310590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 215410590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 21550436fd9aSVladimir Shulman used_new, used_before_complete)) { 21560436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21570436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 21587c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 21597c0acf86SVladimir Kondratiev } 216067c3e1b4SVladimir Kondratiev 2161f9e3033fSDedy Lansky /* shall we wake net queues? */ 2162f9e3033fSDedy Lansky if (done) 21635bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2164e0287c4aSVladimir Kondratiev 2165e0287c4aSVladimir Kondratiev return done; 21662be7d22fSVladimir Kondratiev } 216796c93589SGidon Studinski 216896c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 216996c93589SGidon Studinski { 217096c93589SGidon Studinski return 0; 217196c93589SGidon Studinski } 217296c93589SGidon Studinski 217396c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 217496c93589SGidon Studinski 217596c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 217696c93589SGidon Studinski { 217796c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 217896c93589SGidon Studinski wil_configure_interrupt_moderation; 217996c93589SGidon Studinski /* TX ops */ 21809202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 21819202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 21829202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 218396c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 218496c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 218596c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 218696c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 218796c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 218896c93589SGidon Studinski /* RX ops */ 218996c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 219096c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 219196c93589SGidon Studinski } 2192