12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3387f3794SMaya Erez * Copyright (c) 2018-2019, 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" 317be13fc3SGidon Studinski #include "txrx_edma.h" 322be7d22fSVladimir Kondratiev 33c406ea7cSVladimir Kondratiev bool rx_align_2; 3478484c44SMaya Erez module_param(rx_align_2, bool, 0444); 35c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 36c406ea7cSVladimir Kondratiev 3752a45702SLior David bool rx_large_buf; 3852a45702SLior David module_param(rx_large_buf, bool, 0444); 3952a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4052a45702SLior David 410439a5e0SDedy Lansky /* Drop Tx packets in case Tx ring is full */ 420439a5e0SDedy Lansky bool drop_if_ring_full; 430439a5e0SDedy Lansky 44c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 45c406ea7cSVladimir Kondratiev { 46c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 47c406ea7cSVladimir Kondratiev } 48c406ea7cSVladimir Kondratiev 4910590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 5010590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 512be7d22fSVladimir Kondratiev { 5210590c6aSGidon Studinski return ring->size / 8; 532be7d22fSVladimir Kondratiev } 542be7d22fSVladimir Kondratiev 5510590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 5610590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 572be7d22fSVladimir Kondratiev { 5810590c6aSGidon Studinski return ring->size / 4; 595bb6423eSVladimir Kondratiev } 605bb6423eSVladimir Kondratiev 61f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 6210590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 63f9e3033fSDedy Lansky { 6410590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 65f9e3033fSDedy Lansky } 66f9e3033fSDedy Lansky 67f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 6810590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 69f9e3033fSDedy Lansky { 7010590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 71f9e3033fSDedy Lansky } 72f9e3033fSDedy Lansky 73fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 74fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 75fe9ee51eSMaya Erez { 76fe9ee51eSMaya Erez int i; 77fe9ee51eSMaya Erez unsigned long data_comp_to; 78df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 79fe9ee51eSMaya Erez 80df2b5388SMaya Erez for (i = min_ring_id; 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 2830b853210SMaya Erez /** 2840b853210SMaya Erez * Make sure that the network stack calculates checksum for packets 2850b853210SMaya Erez * which failed the HW checksum calculation 2860b853210SMaya Erez */ 2870b853210SMaya Erez skb->ip_summed = CHECKSUM_NONE; 2880b853210SMaya Erez 2892be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2902be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2912be7d22fSVladimir Kondratiev kfree_skb(skb); 2922be7d22fSVladimir Kondratiev return -ENOMEM; 2932be7d22fSVladimir Kondratiev } 2942be7d22fSVladimir Kondratiev 29548c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29668ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2972be7d22fSVladimir Kondratiev /* ip_length don't care */ 2982be7d22fSVladimir Kondratiev /* b11 don't care */ 2992be7d22fSVladimir Kondratiev /* error don't care */ 3002be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3017e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 30268ada71eSVladimir Kondratiev *_d = *d; 303f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3042be7d22fSVladimir Kondratiev 3052be7d22fSVladimir Kondratiev return 0; 3062be7d22fSVladimir Kondratiev } 3072be7d22fSVladimir Kondratiev 3082be7d22fSVladimir Kondratiev /** 3092be7d22fSVladimir Kondratiev * Adds radiotap header 3102be7d22fSVladimir Kondratiev * 3112be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3122be7d22fSVladimir Kondratiev * 3132be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3142be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3152be7d22fSVladimir Kondratiev * - Phy info 3162be7d22fSVladimir Kondratiev */ 3172be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 31833e61169SVladimir Kondratiev struct sk_buff *skb) 3192be7d22fSVladimir Kondratiev { 3202be7d22fSVladimir Kondratiev struct wil6210_rtap { 3212be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3222be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3232be7d22fSVladimir Kondratiev /* flags */ 3242be7d22fSVladimir Kondratiev u8 flags; 3252be7d22fSVladimir Kondratiev /* channel */ 3262be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3272be7d22fSVladimir Kondratiev __le16 chnl_flags; 3282be7d22fSVladimir Kondratiev /* MCS */ 3292be7d22fSVladimir Kondratiev u8 mcs_present; 3302be7d22fSVladimir Kondratiev u8 mcs_flags; 3312be7d22fSVladimir Kondratiev u8 mcs_index; 3322be7d22fSVladimir Kondratiev } __packed; 33333e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 334387f3794SMaya Erez struct wil6210_rtap *rtap; 3352be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3367d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3372be7d22fSVladimir Kondratiev 3382be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3392be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3409165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3412be7d22fSVladimir Kondratiev return; 3422be7d22fSVladimir Kondratiev } 3432be7d22fSVladimir Kondratiev 344387f3794SMaya Erez rtap = skb_push(skb, rtap_len); 345387f3794SMaya Erez memset(rtap, 0, rtap_len); 3462be7d22fSVladimir Kondratiev 347387f3794SMaya Erez rtap->rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 348387f3794SMaya Erez rtap->rthdr.it_len = cpu_to_le16(rtap_len); 349387f3794SMaya Erez rtap->rthdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | 3502be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3512be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3522be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 353387f3794SMaya Erez rtap->flags |= IEEE80211_RADIOTAP_F_BADFCS; 3542be7d22fSVladimir Kondratiev 355387f3794SMaya Erez rtap->chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 356387f3794SMaya Erez rtap->chnl_flags = cpu_to_le16(0); 3572be7d22fSVladimir Kondratiev 358387f3794SMaya Erez rtap->mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 359387f3794SMaya Erez rtap->mcs_flags = 0; 360387f3794SMaya Erez rtap->mcs_index = wil_rxdesc_mcs(d); 3612be7d22fSVladimir Kondratiev } 3622be7d22fSVladimir Kondratiev 3637be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 364fe9ee51eSMaya Erez { 365fe9ee51eSMaya Erez struct vring_rx_desc *_d; 36610590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 367fe9ee51eSMaya Erez 36810590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 369fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 370fe9ee51eSMaya Erez return false; 371fe9ee51eSMaya Erez 372fe9ee51eSMaya Erez return true; 373fe9ee51eSMaya Erez } 374fe9ee51eSMaya Erez 375bf0353a6SAhmad Masri static int wil_rx_get_cid_by_skb(struct wil6210_priv *wil, struct sk_buff *skb) 376bf0353a6SAhmad Masri { 377bf0353a6SAhmad Masri struct vring_rx_desc *d = wil_skb_rxdesc(skb); 378bf0353a6SAhmad Masri int mid = wil_rxdesc_mid(d); 379bf0353a6SAhmad Masri struct wil6210_vif *vif = wil->vifs[mid]; 380bf0353a6SAhmad Masri /* cid from DMA descriptor is limited to 3 bits. 381bf0353a6SAhmad Masri * In case of cid>=8, the value would be cid modulo 8 and we need to 382bf0353a6SAhmad Masri * find real cid by locating the transmitter (ta) inside sta array 383bf0353a6SAhmad Masri */ 384bf0353a6SAhmad Masri int cid = wil_rxdesc_cid(d); 385bf0353a6SAhmad Masri unsigned int snaplen = wil_rx_snaplen(); 386bf0353a6SAhmad Masri struct ieee80211_hdr_3addr *hdr; 387bf0353a6SAhmad Masri int i; 388bf0353a6SAhmad Masri unsigned char *ta; 389bf0353a6SAhmad Masri u8 ftype; 390bf0353a6SAhmad Masri 391bf0353a6SAhmad Masri /* in monitor mode there are no connections */ 392bf0353a6SAhmad Masri if (vif->wdev.iftype == NL80211_IFTYPE_MONITOR) 393bf0353a6SAhmad Masri return cid; 394bf0353a6SAhmad Masri 395bf0353a6SAhmad Masri ftype = wil_rxdesc_ftype(d) << 2; 396bf0353a6SAhmad Masri if (likely(ftype == IEEE80211_FTYPE_DATA)) { 397bf0353a6SAhmad Masri if (unlikely(skb->len < ETH_HLEN + snaplen)) { 398bf0353a6SAhmad Masri wil_err_ratelimited(wil, 399bf0353a6SAhmad Masri "Short data frame, len = %d\n", 400bf0353a6SAhmad Masri skb->len); 401bf0353a6SAhmad Masri return -ENOENT; 402bf0353a6SAhmad Masri } 4036d1ba32cSAhmad Masri ta = wil_skb_get_sa(skb); 404bf0353a6SAhmad Masri } else { 405bf0353a6SAhmad Masri if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) { 406bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Short frame, len = %d\n", 407bf0353a6SAhmad Masri skb->len); 408bf0353a6SAhmad Masri return -ENOENT; 409bf0353a6SAhmad Masri } 410bf0353a6SAhmad Masri hdr = (void *)skb->data; 411bf0353a6SAhmad Masri ta = hdr->addr2; 412bf0353a6SAhmad Masri } 413bf0353a6SAhmad Masri 414ddf7afddSAhmad Masri if (wil->max_assoc_sta <= WIL6210_RX_DESC_MAX_CID) 415bf0353a6SAhmad Masri return cid; 416bf0353a6SAhmad Masri 417bf0353a6SAhmad Masri /* assuming no concurrency between AP interfaces and STA interfaces. 418bf0353a6SAhmad Masri * multista is used only in P2P_GO or AP mode. In other modes return 419bf0353a6SAhmad Masri * cid from the rx descriptor 420bf0353a6SAhmad Masri */ 421bf0353a6SAhmad Masri if (vif->wdev.iftype != NL80211_IFTYPE_P2P_GO && 422bf0353a6SAhmad Masri vif->wdev.iftype != NL80211_IFTYPE_AP) 423bf0353a6SAhmad Masri return cid; 424bf0353a6SAhmad Masri 425bf0353a6SAhmad Masri /* For Rx packets cid from rx descriptor is limited to 3 bits (0..7), 426bf0353a6SAhmad Masri * to find the real cid, compare transmitter address with the stored 427bf0353a6SAhmad Masri * stations mac address in the driver sta array 428bf0353a6SAhmad Masri */ 429ddf7afddSAhmad Masri for (i = cid; i < wil->max_assoc_sta; i += WIL6210_RX_DESC_MAX_CID) { 430bf0353a6SAhmad Masri if (wil->sta[i].status != wil_sta_unused && 431bf0353a6SAhmad Masri ether_addr_equal(wil->sta[i].addr, ta)) { 432bf0353a6SAhmad Masri cid = i; 433bf0353a6SAhmad Masri break; 434bf0353a6SAhmad Masri } 435bf0353a6SAhmad Masri } 436ddf7afddSAhmad Masri if (i >= wil->max_assoc_sta) { 437bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Could not find cid for frame with transmit addr = %pM, iftype = %d, frametype = %d, len = %d\n", 438bf0353a6SAhmad Masri ta, vif->wdev.iftype, ftype, skb->len); 439bf0353a6SAhmad Masri cid = -ENOENT; 440bf0353a6SAhmad Masri } 441bf0353a6SAhmad Masri 442bf0353a6SAhmad Masri return cid; 443bf0353a6SAhmad Masri } 444bf0353a6SAhmad Masri 4452be7d22fSVladimir Kondratiev /** 4462be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4472be7d22fSVladimir Kondratiev * 44833e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 44933e61169SVladimir Kondratiev * 4502be7d22fSVladimir Kondratiev * Safe to call from IRQ 4512be7d22fSVladimir Kondratiev */ 4522be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 45310590c6aSGidon Studinski struct wil_ring *vring) 4542be7d22fSVladimir Kondratiev { 4552be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4565bd60982SLior David struct wil6210_vif *vif; 4575bd60982SLior David struct net_device *ndev; 45868ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 45968ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4602be7d22fSVladimir Kondratiev struct sk_buff *skb; 4612be7d22fSVladimir Kondratiev dma_addr_t pa; 462c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 46352a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4647e594444SVladimir Kondratiev u16 dmalen; 4652be7d22fSVladimir Kondratiev u8 ftype; 4665bd60982SLior David int cid, mid; 4673b282bc6SVladimir Kondratiev int i; 468c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 469c8b78b5fSVladimir Kondratiev 470bf0353a6SAhmad Masri BUILD_BUG_ON(sizeof(struct skb_rx_info) > sizeof(skb->cb)); 47133e61169SVladimir Kondratiev 4723b282bc6SVladimir Kondratiev again: 47310590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4742be7d22fSVladimir Kondratiev return NULL; 4752be7d22fSVladimir Kondratiev 4763b282bc6SVladimir Kondratiev i = (int)vring->swhead; 47710590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 47833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4792be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4802be7d22fSVladimir Kondratiev return NULL; 4812be7d22fSVladimir Kondratiev } 4822be7d22fSVladimir Kondratiev 483148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 484148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 48510590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 486148416a9SVladimir Kondratiev if (!skb) { 487148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4883b282bc6SVladimir Kondratiev goto again; 489148416a9SVladimir Kondratiev } 49068ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 49168ada71eSVladimir Kondratiev *d = *_d; 49268ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 49368ada71eSVladimir Kondratiev 49468ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 49568ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 49668ada71eSVladimir Kondratiev 497148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 498148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 499a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 50068ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 50168ada71eSVladimir Kondratiev 5025bd60982SLior David mid = wil_rxdesc_mid(d); 5035bd60982SLior David vif = wil->vifs[mid]; 5045bd60982SLior David 5055bd60982SLior David if (unlikely(!vif)) { 5065bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 5075bd60982SLior David mid); 5085bd60982SLior David kfree_skb(skb); 5095bd60982SLior David goto again; 5105bd60982SLior David } 5115bd60982SLior David ndev = vif_to_ndev(vif); 51233c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 513bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Rx size too large: %d bytes!\n", 514bf0353a6SAhmad Masri dmalen); 515110dea00SWei Yongjun kfree_skb(skb); 5163b282bc6SVladimir Kondratiev goto again; 517e270045bSVladimir Kondratiev } 5187e594444SVladimir Kondratiev skb_trim(skb, dmalen); 51933e61169SVladimir Kondratiev 5201cbbcb08SVladimir Kondratiev prefetch(skb->data); 5211cbbcb08SVladimir Kondratiev 522c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 523c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 524c0d37713SVladimir Kondratiev 525bf0353a6SAhmad Masri cid = wil_rx_get_cid_by_skb(wil, skb); 526bf0353a6SAhmad Masri if (cid == -ENOENT) { 527bf0353a6SAhmad Masri kfree_skb(skb); 528bf0353a6SAhmad Masri goto again; 529bf0353a6SAhmad Masri } 530bf0353a6SAhmad Masri wil_skb_set_cid(skb, (u8)cid); 531bf0353a6SAhmad Masri stats = &wil->sta[cid].stats; 532bf0353a6SAhmad Masri 533c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 534c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 535c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5362be7d22fSVladimir Kondratiev 5372be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5382be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 53933e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5402be7d22fSVladimir Kondratiev 5412be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5422be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5432be7d22fSVladimir Kondratiev return skb; 544a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5452be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5462be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5472be7d22fSVladimir Kondratiev */ 54868ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 54933c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 550a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 551a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 552a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 553a8313341SVladimir Kondratiev 554a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 555a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 556a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5573b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 558a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 559a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 560a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 561a8313341SVladimir Kondratiev mid, cid, tid, seq); 5625bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 563a8313341SVladimir Kondratiev } else { 564a8313341SVladimir Kondratiev /* print again all info. One can enable only this 565a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 566a8313341SVladimir Kondratiev */ 567a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 568a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 569a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 570a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 571a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 572a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 573a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 574a8313341SVladimir Kondratiev } 5752be7d22fSVladimir Kondratiev kfree_skb(skb); 5763b282bc6SVladimir Kondratiev goto again; 5772be7d22fSVladimir Kondratiev } 5782be7d22fSVladimir Kondratiev 579504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 580504937d4SKirshenbaum Erez * and in case of error drop the packet 581504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 582504937d4SKirshenbaum Erez */ 58333c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 584504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 58533c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 586504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5874a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5884a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5894a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5904a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5914a68ab10SVladimir Kondratiev */ 5920b853210SMaya Erez else 5930b853210SMaya Erez stats->rx_csum_err++; 594504937d4SKirshenbaum Erez } 595504937d4SKirshenbaum Erez 596c406ea7cSVladimir Kondratiev if (snaplen) { 597c406ea7cSVladimir Kondratiev /* Packet layout 598c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 599c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 600c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 601c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 602c406ea7cSVladimir Kondratiev */ 603c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 604c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 605c406ea7cSVladimir Kondratiev } 606c406ea7cSVladimir Kondratiev 6072be7d22fSVladimir Kondratiev return skb; 6082be7d22fSVladimir Kondratiev } 6092be7d22fSVladimir Kondratiev 6102be7d22fSVladimir Kondratiev /** 6112be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 6122be7d22fSVladimir Kondratiev * buffers posted at @swtail 6135bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6145bd60982SLior David * allocate skbs with headroom according to main interface only. This 6155bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6165bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6175bd60982SLior David * and we will need to fix this code once we add support. 6182be7d22fSVladimir Kondratiev */ 6192be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6202be7d22fSVladimir Kondratiev { 621e00243faSLior David struct net_device *ndev = wil->main_ndev; 62210590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6232be7d22fSVladimir Kondratiev u32 next_tail; 6242be7d22fSVladimir Kondratiev int rc = 0; 6252be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6262be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6272be7d22fSVladimir Kondratiev 62810590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6292be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6302be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6312be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 63233c477fdSVladimir Kondratiev if (unlikely(rc)) { 6333d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6342be7d22fSVladimir Kondratiev rc, v->swtail); 6352be7d22fSVladimir Kondratiev break; 6362be7d22fSVladimir Kondratiev } 6372be7d22fSVladimir Kondratiev } 638ab6d7cc3SMaya Erez 639ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 640ab6d7cc3SMaya Erez * committing them to HW 641ab6d7cc3SMaya Erez */ 642ab6d7cc3SMaya Erez wmb(); 643ab6d7cc3SMaya Erez 644b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6452be7d22fSVladimir Kondratiev 6462be7d22fSVladimir Kondratiev return rc; 6472be7d22fSVladimir Kondratiev } 6482be7d22fSVladimir Kondratiev 64958527421SVladimir Kondratiev /** 65058527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 65158527421SVladimir Kondratiev * @cs: One area of memory 65258527421SVladimir Kondratiev * @ct: Another area of memory 65358527421SVladimir Kondratiev * @count: The size of the area. 65458527421SVladimir Kondratiev * 65558527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 65658527421SVladimir Kondratiev * with minimal modifications 65758527421SVladimir Kondratiev */ 6587be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 65958527421SVladimir Kondratiev { 66058527421SVladimir Kondratiev const unsigned char *su1, *su2; 66158527421SVladimir Kondratiev int res = 0; 66258527421SVladimir Kondratiev 66358527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 66458527421SVladimir Kondratiev --su1, --su2, count--) { 66558527421SVladimir Kondratiev res = *su1 - *su2; 66658527421SVladimir Kondratiev if (res) 66758527421SVladimir Kondratiev break; 66858527421SVladimir Kondratiev } 66958527421SVladimir Kondratiev return res; 67058527421SVladimir Kondratiev } 67158527421SVladimir Kondratiev 67258527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 67358527421SVladimir Kondratiev { 67458527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 675bf0353a6SAhmad Masri int cid = wil_skb_get_cid(skb); 67658527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 67758527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 67858527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 67958527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 68058527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 68158527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 68258527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 68358527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 68458527421SVladimir Kondratiev 68558527421SVladimir Kondratiev if (!cc->key_set) { 68658527421SVladimir Kondratiev wil_err_ratelimited(wil, 68758527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 68858527421SVladimir Kondratiev cid, tid, mc, key_id); 68958527421SVladimir Kondratiev return -EINVAL; 69058527421SVladimir Kondratiev } 69158527421SVladimir Kondratiev 69258527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 69358527421SVladimir Kondratiev wil_err_ratelimited(wil, 69458527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 69558527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 69658527421SVladimir Kondratiev return -EINVAL; 69758527421SVladimir Kondratiev } 69858527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 69958527421SVladimir Kondratiev 70058527421SVladimir Kondratiev return 0; 70158527421SVladimir Kondratiev } 70258527421SVladimir Kondratiev 703e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 704e15af41cSDedy Lansky struct wil_net_stats *stats) 705e15af41cSDedy Lansky { 706e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 707e15af41cSDedy Lansky 708e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 709e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 710e15af41cSDedy Lansky stats->rx_mic_error++; 711e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 712e15af41cSDedy Lansky return -EFAULT; 713e15af41cSDedy Lansky } 714e15af41cSDedy Lansky 715e15af41cSDedy Lansky return 0; 716e15af41cSDedy Lansky } 717e15af41cSDedy Lansky 7187be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 7197be13fc3SGidon Studinski int *security) 7207be13fc3SGidon Studinski { 7217be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 7227be13fc3SGidon Studinski 723bf0353a6SAhmad Masri *cid = wil_skb_get_cid(skb); 7247be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 7257be13fc3SGidon Studinski } 7267be13fc3SGidon Studinski 7272be7d22fSVladimir Kondratiev /* 72842fe1e51SAhmad Masri * Check if skb is ptk eapol key message 72942fe1e51SAhmad Masri * 73042fe1e51SAhmad Masri * returns a pointer to the start of the eapol key structure, NULL 73142fe1e51SAhmad Masri * if frame is not PTK eapol key 73242fe1e51SAhmad Masri */ 73342fe1e51SAhmad Masri static struct wil_eapol_key *wil_is_ptk_eapol_key(struct wil6210_priv *wil, 73442fe1e51SAhmad Masri struct sk_buff *skb) 73542fe1e51SAhmad Masri { 73642fe1e51SAhmad Masri u8 *buf; 73742fe1e51SAhmad Masri const struct wil_1x_hdr *hdr; 73842fe1e51SAhmad Masri struct wil_eapol_key *key; 73942fe1e51SAhmad Masri u16 key_info; 74042fe1e51SAhmad Masri int len = skb->len; 74142fe1e51SAhmad Masri 74242fe1e51SAhmad Masri if (!skb_mac_header_was_set(skb)) { 74342fe1e51SAhmad Masri wil_err(wil, "mac header was not set\n"); 74442fe1e51SAhmad Masri return NULL; 74542fe1e51SAhmad Masri } 74642fe1e51SAhmad Masri 74742fe1e51SAhmad Masri len -= skb_mac_offset(skb); 74842fe1e51SAhmad Masri 74942fe1e51SAhmad Masri if (len < sizeof(struct ethhdr) + sizeof(struct wil_1x_hdr) + 75042fe1e51SAhmad Masri sizeof(struct wil_eapol_key)) 75142fe1e51SAhmad Masri return NULL; 75242fe1e51SAhmad Masri 75342fe1e51SAhmad Masri buf = skb_mac_header(skb) + sizeof(struct ethhdr); 75442fe1e51SAhmad Masri 75542fe1e51SAhmad Masri hdr = (const struct wil_1x_hdr *)buf; 75642fe1e51SAhmad Masri if (hdr->type != WIL_1X_TYPE_EAPOL_KEY) 75742fe1e51SAhmad Masri return NULL; 75842fe1e51SAhmad Masri 75942fe1e51SAhmad Masri key = (struct wil_eapol_key *)(buf + sizeof(struct wil_1x_hdr)); 76042fe1e51SAhmad Masri if (key->type != WIL_EAPOL_KEY_TYPE_WPA && 76142fe1e51SAhmad Masri key->type != WIL_EAPOL_KEY_TYPE_RSN) 76242fe1e51SAhmad Masri return NULL; 76342fe1e51SAhmad Masri 76442fe1e51SAhmad Masri key_info = be16_to_cpu(key->key_info); 76542fe1e51SAhmad Masri if (!(key_info & WIL_KEY_INFO_KEY_TYPE)) /* check if pairwise */ 76642fe1e51SAhmad Masri return NULL; 76742fe1e51SAhmad Masri 76842fe1e51SAhmad Masri return key; 76942fe1e51SAhmad Masri } 77042fe1e51SAhmad Masri 77142fe1e51SAhmad Masri static bool wil_skb_is_eap_3(struct wil6210_priv *wil, struct sk_buff *skb) 77242fe1e51SAhmad Masri { 77342fe1e51SAhmad Masri struct wil_eapol_key *key; 77442fe1e51SAhmad Masri u16 key_info; 77542fe1e51SAhmad Masri 77642fe1e51SAhmad Masri key = wil_is_ptk_eapol_key(wil, skb); 77742fe1e51SAhmad Masri if (!key) 77842fe1e51SAhmad Masri return false; 77942fe1e51SAhmad Masri 78042fe1e51SAhmad Masri key_info = be16_to_cpu(key->key_info); 78142fe1e51SAhmad Masri if (key_info & (WIL_KEY_INFO_MIC | 78242fe1e51SAhmad Masri WIL_KEY_INFO_ENCR_KEY_DATA)) { 78342fe1e51SAhmad Masri /* 3/4 of 4-Way Handshake */ 78442fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 3\n"); 78542fe1e51SAhmad Masri return true; 78642fe1e51SAhmad Masri } 78742fe1e51SAhmad Masri /* 1/4 of 4-Way Handshake */ 78842fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 1\n"); 78942fe1e51SAhmad Masri 79042fe1e51SAhmad Masri return false; 79142fe1e51SAhmad Masri } 79242fe1e51SAhmad Masri 79342fe1e51SAhmad Masri static bool wil_skb_is_eap_4(struct wil6210_priv *wil, struct sk_buff *skb) 79442fe1e51SAhmad Masri { 79542fe1e51SAhmad Masri struct wil_eapol_key *key; 79642fe1e51SAhmad Masri u32 *nonce, i; 79742fe1e51SAhmad Masri 79842fe1e51SAhmad Masri key = wil_is_ptk_eapol_key(wil, skb); 79942fe1e51SAhmad Masri if (!key) 80042fe1e51SAhmad Masri return false; 80142fe1e51SAhmad Masri 80242fe1e51SAhmad Masri nonce = (u32 *)key->key_nonce; 80342fe1e51SAhmad Masri for (i = 0; i < WIL_EAP_NONCE_LEN / sizeof(u32); i++, nonce++) { 80442fe1e51SAhmad Masri if (*nonce != 0) { 80542fe1e51SAhmad Masri /* message 2/4 */ 80642fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 2\n"); 80742fe1e51SAhmad Masri return false; 80842fe1e51SAhmad Masri } 80942fe1e51SAhmad Masri } 81042fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 4\n"); 81142fe1e51SAhmad Masri 81242fe1e51SAhmad Masri return true; 81342fe1e51SAhmad Masri } 81442fe1e51SAhmad Masri 81542fe1e51SAhmad Masri void wil_enable_tx_key_worker(struct work_struct *work) 81642fe1e51SAhmad Masri { 81742fe1e51SAhmad Masri struct wil6210_vif *vif = container_of(work, 81842fe1e51SAhmad Masri struct wil6210_vif, enable_tx_key_worker); 81942fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 82042fe1e51SAhmad Masri int rc, cid; 82142fe1e51SAhmad Masri 82242fe1e51SAhmad Masri rtnl_lock(); 82342fe1e51SAhmad Masri if (vif->ptk_rekey_state != WIL_REKEY_WAIT_M4_SENT) { 82442fe1e51SAhmad Masri wil_dbg_misc(wil, "Invalid rekey state = %d\n", 82542fe1e51SAhmad Masri vif->ptk_rekey_state); 82642fe1e51SAhmad Masri rtnl_unlock(); 82742fe1e51SAhmad Masri return; 82842fe1e51SAhmad Masri } 82942fe1e51SAhmad Masri 83042fe1e51SAhmad Masri cid = wil_find_cid_by_idx(wil, vif->mid, 0); 83142fe1e51SAhmad Masri if (!wil_cid_valid(wil, cid)) { 83242fe1e51SAhmad Masri wil_err(wil, "Invalid cid = %d\n", cid); 83342fe1e51SAhmad Masri rtnl_unlock(); 83442fe1e51SAhmad Masri return; 83542fe1e51SAhmad Masri } 83642fe1e51SAhmad Masri 83742fe1e51SAhmad Masri wil_dbg_misc(wil, "Apply PTK key after eapol was sent out\n"); 83842fe1e51SAhmad Masri rc = wmi_add_cipher_key(vif, 0, wil->sta[cid].addr, 0, NULL, 83942fe1e51SAhmad Masri WMI_KEY_USE_APPLY_PTK); 84042fe1e51SAhmad Masri 84142fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_IDLE; 84242fe1e51SAhmad Masri rtnl_unlock(); 84342fe1e51SAhmad Masri 84442fe1e51SAhmad Masri if (rc) 84542fe1e51SAhmad Masri wil_err(wil, "Apply PTK key failed %d\n", rc); 84642fe1e51SAhmad Masri } 84742fe1e51SAhmad Masri 84842fe1e51SAhmad Masri void wil_tx_complete_handle_eapol(struct wil6210_vif *vif, struct sk_buff *skb) 84942fe1e51SAhmad Masri { 85042fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 85142fe1e51SAhmad Masri struct wireless_dev *wdev = vif_to_wdev(vif); 85242fe1e51SAhmad Masri bool q = false; 85342fe1e51SAhmad Masri 85442fe1e51SAhmad Masri if (wdev->iftype != NL80211_IFTYPE_STATION || 85542fe1e51SAhmad Masri !test_bit(WMI_FW_CAPABILITY_SPLIT_REKEY, wil->fw_capabilities)) 85642fe1e51SAhmad Masri return; 85742fe1e51SAhmad Masri 85842fe1e51SAhmad Masri /* check if skb is an EAP message 4/4 */ 85942fe1e51SAhmad Masri if (!wil_skb_is_eap_4(wil, skb)) 86042fe1e51SAhmad Masri return; 86142fe1e51SAhmad Masri 86242fe1e51SAhmad Masri spin_lock_bh(&wil->eap_lock); 86342fe1e51SAhmad Masri switch (vif->ptk_rekey_state) { 86442fe1e51SAhmad Masri case WIL_REKEY_IDLE: 86542fe1e51SAhmad Masri /* ignore idle state, can happen due to M4 retransmission */ 86642fe1e51SAhmad Masri break; 86742fe1e51SAhmad Masri case WIL_REKEY_M3_RECEIVED: 86842fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_IDLE; 86942fe1e51SAhmad Masri break; 87042fe1e51SAhmad Masri case WIL_REKEY_WAIT_M4_SENT: 87142fe1e51SAhmad Masri q = true; 87242fe1e51SAhmad Masri break; 87342fe1e51SAhmad Masri default: 87442fe1e51SAhmad Masri wil_err(wil, "Unknown rekey state = %d", 87542fe1e51SAhmad Masri vif->ptk_rekey_state); 87642fe1e51SAhmad Masri } 87742fe1e51SAhmad Masri spin_unlock_bh(&wil->eap_lock); 87842fe1e51SAhmad Masri 87942fe1e51SAhmad Masri if (q) { 88042fe1e51SAhmad Masri q = queue_work(wil->wmi_wq, &vif->enable_tx_key_worker); 88142fe1e51SAhmad Masri wil_dbg_misc(wil, "queue_work of enable_tx_key_worker -> %d\n", 88242fe1e51SAhmad Masri q); 88342fe1e51SAhmad Masri } 88442fe1e51SAhmad Masri } 88542fe1e51SAhmad Masri 88642fe1e51SAhmad Masri static void wil_rx_handle_eapol(struct wil6210_vif *vif, struct sk_buff *skb) 88742fe1e51SAhmad Masri { 88842fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 88942fe1e51SAhmad Masri struct wireless_dev *wdev = vif_to_wdev(vif); 89042fe1e51SAhmad Masri 89142fe1e51SAhmad Masri if (wdev->iftype != NL80211_IFTYPE_STATION || 89242fe1e51SAhmad Masri !test_bit(WMI_FW_CAPABILITY_SPLIT_REKEY, wil->fw_capabilities)) 89342fe1e51SAhmad Masri return; 89442fe1e51SAhmad Masri 89542fe1e51SAhmad Masri /* check if skb is a EAP message 3/4 */ 89642fe1e51SAhmad Masri if (!wil_skb_is_eap_3(wil, skb)) 89742fe1e51SAhmad Masri return; 89842fe1e51SAhmad Masri 89942fe1e51SAhmad Masri if (vif->ptk_rekey_state == WIL_REKEY_IDLE) 90042fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_M3_RECEIVED; 90142fe1e51SAhmad Masri } 90242fe1e51SAhmad Masri 90342fe1e51SAhmad Masri /* 9042be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 905e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 9062be7d22fSVladimir Kondratiev */ 907f99fe49fSDedy Lansky void wil_netif_rx(struct sk_buff *skb, struct net_device *ndev, int cid, 908f99fe49fSDedy Lansky struct wil_net_stats *stats, bool gro) 9092be7d22fSVladimir Kondratiev { 910c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 911e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 912c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 913e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 9142be7d22fSVladimir Kondratiev unsigned int len = skb->len; 9156d1ba32cSAhmad Masri u8 *sa, *da = wil_skb_get_da(skb); 916c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 917c42da999SVladimir Kondratiev * is not suitable, need to look at data 918c42da999SVladimir Kondratiev */ 9196d1ba32cSAhmad Masri int mcast = is_multicast_ether_addr(da); 920c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 921c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 922c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 923c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 924c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 925c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 926c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 927bfabdd69SGustavo A. R. Silva [GRO_CONSUMED] = "GRO_CONSUMED", 928c42da999SVladimir Kondratiev }; 9292be7d22fSVladimir Kondratiev 9309a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 9316d1ba32cSAhmad Masri sa = wil_skb_get_sa(skb); 9326d1ba32cSAhmad Masri if (mcast && ether_addr_equal(sa, ndev->dev_addr)) { 9339a65064aSDedy Lansky /* mcast packet looped back to us */ 9349a65064aSDedy Lansky rc = GRO_DROP; 9359a65064aSDedy Lansky dev_kfree_skb(skb); 9369a65064aSDedy Lansky goto stats; 9379a65064aSDedy Lansky } 9389a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 939c42da999SVladimir Kondratiev if (mcast) { 940c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 941c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 942c42da999SVladimir Kondratiev */ 943c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 944c42da999SVladimir Kondratiev } else { 9456d1ba32cSAhmad Masri int xmit_cid = wil_find_cid(wil, vif->mid, da); 9462be7d22fSVladimir Kondratiev 947c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 948c42da999SVladimir Kondratiev /* The destination station is associated to 949c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 950c42da999SVladimir Kondratiev * directly to it and do not pass it to local 951c42da999SVladimir Kondratiev * net stack. 952c42da999SVladimir Kondratiev */ 953c42da999SVladimir Kondratiev xmit_skb = skb; 954c42da999SVladimir Kondratiev skb = NULL; 955c42da999SVladimir Kondratiev } 956c42da999SVladimir Kondratiev } 957c42da999SVladimir Kondratiev } 958c42da999SVladimir Kondratiev if (xmit_skb) { 959c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 960c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 961c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 962c42da999SVladimir Kondratiev */ 963c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 964c42da999SVladimir Kondratiev xmit_skb->priority += 256; 965c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 966c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 967c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 968c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 969c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 970c42da999SVladimir Kondratiev } 971c42da999SVladimir Kondratiev 972c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 973c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 9745bd60982SLior David skb->dev = ndev; 97542fe1e51SAhmad Masri 97642fe1e51SAhmad Masri if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 97742fe1e51SAhmad Masri wil_rx_handle_eapol(vif, skb); 97842fe1e51SAhmad Masri 979f99fe49fSDedy Lansky if (gro) 980c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 981f99fe49fSDedy Lansky else 982f99fe49fSDedy Lansky netif_rx_ni(skb); 983c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 984c42da999SVladimir Kondratiev len, gro_res_str[rc]); 985c42da999SVladimir Kondratiev } 98658527421SVladimir Kondratiev stats: 987c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 988b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 989b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 990b5998e6aSVladimir Kondratiev stats->rx_dropped++; 991b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 992b5998e6aSVladimir Kondratiev } else { 9932be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 994c8b78b5fSVladimir Kondratiev stats->rx_packets++; 9952be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 996c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 997c42da999SVladimir Kondratiev if (mcast) 998c42da999SVladimir Kondratiev ndev->stats.multicast++; 999194b482bSVladimir Kondratiev } 10002be7d22fSVladimir Kondratiev } 10012be7d22fSVladimir Kondratiev 1002f99fe49fSDedy Lansky void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 1003f99fe49fSDedy Lansky { 1004f99fe49fSDedy Lansky int cid, security; 1005f99fe49fSDedy Lansky struct wil6210_priv *wil = ndev_to_wil(ndev); 1006f99fe49fSDedy Lansky struct wil_net_stats *stats; 1007f99fe49fSDedy Lansky 1008f99fe49fSDedy Lansky wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 1009f99fe49fSDedy Lansky 1010f99fe49fSDedy Lansky stats = &wil->sta[cid].stats; 1011f99fe49fSDedy Lansky 1012f99fe49fSDedy Lansky skb_orphan(skb); 1013f99fe49fSDedy Lansky 1014f99fe49fSDedy Lansky if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 1015f99fe49fSDedy Lansky dev_kfree_skb(skb); 1016f99fe49fSDedy Lansky ndev->stats.rx_dropped++; 1017f99fe49fSDedy Lansky stats->rx_replay++; 1018f99fe49fSDedy Lansky stats->rx_dropped++; 1019f99fe49fSDedy Lansky wil_dbg_txrx(wil, "Rx drop %d bytes\n", skb->len); 1020f99fe49fSDedy Lansky return; 1021f99fe49fSDedy Lansky } 1022f99fe49fSDedy Lansky 1023f99fe49fSDedy Lansky /* check errors reported by HW and update statistics */ 1024f99fe49fSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 1025f99fe49fSDedy Lansky dev_kfree_skb(skb); 1026f99fe49fSDedy Lansky return; 1027f99fe49fSDedy Lansky } 1028f99fe49fSDedy Lansky 1029f99fe49fSDedy Lansky wil_netif_rx(skb, ndev, cid, stats, true); 1030f99fe49fSDedy Lansky } 1031f99fe49fSDedy Lansky 10322be7d22fSVladimir Kondratiev /** 10332be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 10342be7d22fSVladimir Kondratiev * 1035e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 10362be7d22fSVladimir Kondratiev */ 1037e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 10382be7d22fSVladimir Kondratiev { 1039e00243faSLior David struct net_device *ndev = wil->main_ndev; 1040e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 104110590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 10422be7d22fSVladimir Kondratiev struct sk_buff *skb; 10432be7d22fSVladimir Kondratiev 104433c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 10452be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 10462be7d22fSVladimir Kondratiev return; 10472be7d22fSVladimir Kondratiev } 1048af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 1049e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 1050e0287c4aSVladimir Kondratiev (*quota)--; 10512be7d22fSVladimir Kondratiev 1052e00243faSLior David /* monitor is currently supported on main interface only */ 1053e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 10542be7d22fSVladimir Kondratiev skb->dev = ndev; 10552be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 10562be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 10572be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 10582be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 1059b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 10602be7d22fSVladimir Kondratiev } else { 1061b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 10622be7d22fSVladimir Kondratiev } 10632be7d22fSVladimir Kondratiev } 10642be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 10652be7d22fSVladimir Kondratiev } 10662be7d22fSVladimir Kondratiev 106752a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 106852a45702SLior David { 106952a45702SLior David wil->rx_buf_len = rx_large_buf ? 107052a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 107152a45702SLior David if (mtu_max > wil->rx_buf_len) { 107252a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 107352a45702SLior David * backward compatibility (mtu_max parameter was also used 107452a45702SLior David * to support receiving large packets) 107552a45702SLior David */ 107652a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 107752a45702SLior David wil->rx_buf_len = mtu_max; 107852a45702SLior David } 107952a45702SLior David } 108052a45702SLior David 108161e5ec04SDedy Lansky static int wil_rx_init(struct wil6210_priv *wil, uint order) 10822be7d22fSVladimir Kondratiev { 108310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 10842be7d22fSVladimir Kondratiev int rc; 10852be7d22fSVladimir Kondratiev 1086af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 10879cf10d62SVladimir Kondratiev 10888bf6adb9SVladimir Kondratiev if (vring->va) { 10898bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 10908bf6adb9SVladimir Kondratiev return -EINVAL; 10918bf6adb9SVladimir Kondratiev } 10928bf6adb9SVladimir Kondratiev 109352a45702SLior David wil_rx_buf_len_init(wil); 109452a45702SLior David 109561e5ec04SDedy Lansky vring->size = 1 << order; 109696c93589SGidon Studinski vring->is_rx = true; 10972be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 10982be7d22fSVladimir Kondratiev if (rc) 10992be7d22fSVladimir Kondratiev return rc; 11002be7d22fSVladimir Kondratiev 110147e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 11022be7d22fSVladimir Kondratiev if (rc) 11032be7d22fSVladimir Kondratiev goto err_free; 11042be7d22fSVladimir Kondratiev 11052be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 11062be7d22fSVladimir Kondratiev if (rc) 11072be7d22fSVladimir Kondratiev goto err_free; 11082be7d22fSVladimir Kondratiev 11092be7d22fSVladimir Kondratiev return 0; 11102be7d22fSVladimir Kondratiev err_free: 111196c93589SGidon Studinski wil_vring_free(wil, vring); 11122be7d22fSVladimir Kondratiev 11132be7d22fSVladimir Kondratiev return rc; 11142be7d22fSVladimir Kondratiev } 11152be7d22fSVladimir Kondratiev 111696c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 11172be7d22fSVladimir Kondratiev { 111810590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 11192be7d22fSVladimir Kondratiev 1120af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 11219cf10d62SVladimir Kondratiev 11222acb4220SVladimir Kondratiev if (vring->va) 112396c93589SGidon Studinski wil_vring_free(wil, vring); 11242be7d22fSVladimir Kondratiev } 11252be7d22fSVladimir Kondratiev 11269202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 11279202d7b6SMaya Erez u32 len, int vring_index) 11289202d7b6SMaya Erez { 11299202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 11309202d7b6SMaya Erez 11319202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 11329202d7b6SMaya Erez d->dma.ip_length = 0; 11339202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 11349202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 11359202d7b6SMaya Erez d->dma.error = 0; 11369202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11379202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 11389202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 11399202d7b6SMaya Erez d->mac.d[0] = 0; 11409202d7b6SMaya Erez d->mac.d[1] = 0; 11419202d7b6SMaya Erez d->mac.d[2] = 0; 11429202d7b6SMaya Erez d->mac.ucode_cmd = 0; 11439202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 11449202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 11459202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 11469202d7b6SMaya Erez 11479202d7b6SMaya Erez return 0; 11489202d7b6SMaya Erez } 11499202d7b6SMaya Erez 115096c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 1151875e9439SMaya Erez { 1152875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1153875e9439SMaya Erez txdata->dot1x_open = 0; 1154875e9439SMaya Erez txdata->enabled = 0; 1155875e9439SMaya Erez txdata->idle = 0; 1156875e9439SMaya Erez txdata->last_idle = 0; 1157875e9439SMaya Erez txdata->begin = 0; 1158875e9439SMaya Erez txdata->agg_wsize = 0; 1159875e9439SMaya Erez txdata->agg_timeout = 0; 1160875e9439SMaya Erez txdata->agg_amsdu = 0; 1161875e9439SMaya Erez txdata->addba_in_progress = false; 1162e00243faSLior David txdata->mid = U8_MAX; 1163875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 1164875e9439SMaya Erez } 1165875e9439SMaya Erez 116696c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 11672be7d22fSVladimir Kondratiev int cid, int tid) 11682be7d22fSVladimir Kondratiev { 1169e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 11702be7d22fSVladimir Kondratiev int rc; 11712be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 11722be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 11732be7d22fSVladimir Kondratiev .vring_cfg = { 11742be7d22fSVladimir Kondratiev .tx_sw_ring = { 11759a06bec9SVladimir Kondratiev .max_mpdu_size = 1176c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1177b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 11782be7d22fSVladimir Kondratiev }, 11792be7d22fSVladimir Kondratiev .ringid = id, 11802be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 11812be7d22fSVladimir Kondratiev .mac_ctrl = 0, 11822be7d22fSVladimir Kondratiev .to_resolution = 0, 11833277213fSVladimir Kondratiev .agg_max_wsize = 0, 11842be7d22fSVladimir Kondratiev .schd_params = { 11852be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 11862be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 11872be7d22fSVladimir Kondratiev }, 11882be7d22fSVladimir Kondratiev }, 11892be7d22fSVladimir Kondratiev }; 11902be7d22fSVladimir Kondratiev struct { 1191b874ddecSLior David struct wmi_cmd_hdr wmi; 11922be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1193807b0860SAlexei Avshalom Lazar } __packed reply = { 1194807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1195807b0860SAlexei Avshalom Lazar }; 119610590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 119710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 11982be7d22fSVladimir Kondratiev 1199bf0353a6SAhmad Masri if (cid >= WIL6210_RX_DESC_MAX_CID) { 1200bf0353a6SAhmad Masri cmd.vring_cfg.cidxtid = CIDXTID_EXTENDED_CID_TID; 1201bf0353a6SAhmad Masri cmd.vring_cfg.cid = cid; 1202bf0353a6SAhmad Masri cmd.vring_cfg.tid = tid; 1203bf0353a6SAhmad Masri } else { 1204bf0353a6SAhmad Masri cmd.vring_cfg.cidxtid = mk_cidxtid(cid, tid); 1205bf0353a6SAhmad Masri } 1206bf0353a6SAhmad Masri 1207af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 1208e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 12099b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 12109cf10d62SVladimir Kondratiev 12112be7d22fSVladimir Kondratiev if (vring->va) { 12122be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 12132be7d22fSVladimir Kondratiev rc = -EINVAL; 12142be7d22fSVladimir Kondratiev goto out; 12152be7d22fSVladimir Kondratiev } 12162be7d22fSVladimir Kondratiev 1217875e9439SMaya Erez wil_tx_data_init(txdata); 121896c93589SGidon Studinski vring->is_rx = false; 12192be7d22fSVladimir Kondratiev vring->size = size; 12202be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 12212be7d22fSVladimir Kondratiev if (rc) 12222be7d22fSVladimir Kondratiev goto out; 12232be7d22fSVladimir Kondratiev 122410590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 122510590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 122693ae6d49SVladimir Kondratiev 12272be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 12282be7d22fSVladimir Kondratiev 1229e00243faSLior David if (!vif->privacy) 1230230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1231e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 12322a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 12332a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 12342be7d22fSVladimir Kondratiev if (rc) 12352be7d22fSVladimir Kondratiev goto out_free; 12362be7d22fSVladimir Kondratiev 1237b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 12382be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 12392be7d22fSVladimir Kondratiev reply.cmd.status); 1240c331997bSVladimir Kondratiev rc = -EINVAL; 12412be7d22fSVladimir Kondratiev goto out_free; 12422be7d22fSVladimir Kondratiev } 12432be7d22fSVladimir Kondratiev 1244dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1245dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1246e00243faSLior David txdata->mid = vif->mid; 1247097638a0SVladimir Kondratiev txdata->enabled = 1; 1248dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1249dc90506fSMaya Erez 1250230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 12513a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1252097638a0SVladimir Kondratiev 12532be7d22fSVladimir Kondratiev return 0; 12542be7d22fSVladimir Kondratiev out_free: 1255875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1256230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1257230d8442SVladimir Kondratiev txdata->enabled = 0; 1258875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 125996c93589SGidon Studinski wil_vring_free(wil, vring); 1260ddf7afddSAhmad Masri wil->ring2cid_tid[id][0] = wil->max_assoc_sta; 126110590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 12620916d9f2SMaya Erez 12632be7d22fSVladimir Kondratiev out: 12642be7d22fSVladimir Kondratiev 12652be7d22fSVladimir Kondratiev return rc; 12662be7d22fSVladimir Kondratiev } 12672be7d22fSVladimir Kondratiev 1268b9010f10SAhmad Masri static int wil_tx_vring_modify(struct wil6210_vif *vif, int ring_id, int cid, 1269b9010f10SAhmad Masri int tid) 1270b9010f10SAhmad Masri { 1271b9010f10SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 1272b9010f10SAhmad Masri int rc; 1273b9010f10SAhmad Masri struct wmi_vring_cfg_cmd cmd = { 1274b9010f10SAhmad Masri .action = cpu_to_le32(WMI_VRING_CMD_MODIFY), 1275b9010f10SAhmad Masri .vring_cfg = { 1276b9010f10SAhmad Masri .tx_sw_ring = { 1277b9010f10SAhmad Masri .max_mpdu_size = 1278b9010f10SAhmad Masri cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1279b9010f10SAhmad Masri .ring_size = 0, 1280b9010f10SAhmad Masri }, 1281b9010f10SAhmad Masri .ringid = ring_id, 1282b9010f10SAhmad Masri .cidxtid = mk_cidxtid(cid, tid), 1283b9010f10SAhmad Masri .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 1284b9010f10SAhmad Masri .mac_ctrl = 0, 1285b9010f10SAhmad Masri .to_resolution = 0, 1286b9010f10SAhmad Masri .agg_max_wsize = 0, 1287b9010f10SAhmad Masri .schd_params = { 1288b9010f10SAhmad Masri .priority = cpu_to_le16(0), 1289b9010f10SAhmad Masri .timeslot_us = cpu_to_le16(0xfff), 1290b9010f10SAhmad Masri }, 1291b9010f10SAhmad Masri }, 1292b9010f10SAhmad Masri }; 1293b9010f10SAhmad Masri struct { 1294b9010f10SAhmad Masri struct wmi_cmd_hdr wmi; 1295b9010f10SAhmad Masri struct wmi_vring_cfg_done_event cmd; 1296b9010f10SAhmad Masri } __packed reply = { 1297b9010f10SAhmad Masri .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1298b9010f10SAhmad Masri }; 1299b9010f10SAhmad Masri struct wil_ring *vring = &wil->ring_tx[ring_id]; 1300b9010f10SAhmad Masri struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; 1301b9010f10SAhmad Masri 1302b9010f10SAhmad Masri wil_dbg_misc(wil, "vring_modify: ring %d cid %d tid %d\n", ring_id, 1303b9010f10SAhmad Masri cid, tid); 1304b9010f10SAhmad Masri lockdep_assert_held(&wil->mutex); 1305b9010f10SAhmad Masri 1306b9010f10SAhmad Masri if (!vring->va) { 1307b9010f10SAhmad Masri wil_err(wil, "Tx ring [%d] not allocated\n", ring_id); 1308b9010f10SAhmad Masri return -EINVAL; 1309b9010f10SAhmad Masri } 1310b9010f10SAhmad Masri 1311b9010f10SAhmad Masri if (wil->ring2cid_tid[ring_id][0] != cid || 1312b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] != tid) { 1313b9010f10SAhmad Masri wil_err(wil, "ring info does not match cid=%u tid=%u\n", 1314b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0], 1315b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1]); 1316b9010f10SAhmad Masri } 1317b9010f10SAhmad Masri 1318b9010f10SAhmad Masri cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 1319b9010f10SAhmad Masri 1320b9010f10SAhmad Masri rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 13212a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 13222a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 1323b9010f10SAhmad Masri if (rc) 1324b9010f10SAhmad Masri goto fail; 1325b9010f10SAhmad Masri 1326b9010f10SAhmad Masri if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 1327b9010f10SAhmad Masri wil_err(wil, "Tx modify failed, status 0x%02x\n", 1328b9010f10SAhmad Masri reply.cmd.status); 1329b9010f10SAhmad Masri rc = -EINVAL; 1330b9010f10SAhmad Masri goto fail; 1331b9010f10SAhmad Masri } 1332b9010f10SAhmad Masri 1333b9010f10SAhmad Masri /* set BA aggregation window size to 0 to force a new BA with the 1334b9010f10SAhmad Masri * new AP 1335b9010f10SAhmad Masri */ 1336b9010f10SAhmad Masri txdata->agg_wsize = 0; 1337b9010f10SAhmad Masri if (txdata->dot1x_open && agg_wsize >= 0) 1338b9010f10SAhmad Masri wil_addba_tx_request(wil, ring_id, agg_wsize); 1339b9010f10SAhmad Masri 1340b9010f10SAhmad Masri return 0; 1341b9010f10SAhmad Masri fail: 1342b9010f10SAhmad Masri spin_lock_bh(&txdata->lock); 1343b9010f10SAhmad Masri txdata->dot1x_open = false; 1344b9010f10SAhmad Masri txdata->enabled = 0; 1345b9010f10SAhmad Masri spin_unlock_bh(&txdata->lock); 1346ddf7afddSAhmad Masri wil->ring2cid_tid[ring_id][0] = wil->max_assoc_sta; 1347b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] = 0; 1348b9010f10SAhmad Masri return rc; 1349b9010f10SAhmad Masri } 1350b9010f10SAhmad Masri 1351e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 135241d6b093SVladimir Kondratiev { 1353e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 135441d6b093SVladimir Kondratiev int rc; 135541d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 135641d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 135741d6b093SVladimir Kondratiev .vring_cfg = { 135841d6b093SVladimir Kondratiev .tx_sw_ring = { 135941d6b093SVladimir Kondratiev .max_mpdu_size = 136041d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 136141d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 136241d6b093SVladimir Kondratiev }, 136341d6b093SVladimir Kondratiev .ringid = id, 136441d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 136541d6b093SVladimir Kondratiev }, 136641d6b093SVladimir Kondratiev }; 136741d6b093SVladimir Kondratiev struct { 1368b874ddecSLior David struct wmi_cmd_hdr wmi; 136941d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1370807b0860SAlexei Avshalom Lazar } __packed reply = { 1371807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1372807b0860SAlexei Avshalom Lazar }; 137310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 137410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 137541d6b093SVladimir Kondratiev 1376af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 137741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 13789b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 137941d6b093SVladimir Kondratiev 138041d6b093SVladimir Kondratiev if (vring->va) { 138141d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 138241d6b093SVladimir Kondratiev rc = -EINVAL; 138341d6b093SVladimir Kondratiev goto out; 138441d6b093SVladimir Kondratiev } 138541d6b093SVladimir Kondratiev 1386875e9439SMaya Erez wil_tx_data_init(txdata); 138796c93589SGidon Studinski vring->is_rx = false; 138841d6b093SVladimir Kondratiev vring->size = size; 138941d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 139041d6b093SVladimir Kondratiev if (rc) 139141d6b093SVladimir Kondratiev goto out; 139241d6b093SVladimir Kondratiev 1393ddf7afddSAhmad Masri wil->ring2cid_tid[id][0] = wil->max_assoc_sta; /* CID */ 139410590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 139541d6b093SVladimir Kondratiev 139641d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 139741d6b093SVladimir Kondratiev 1398e00243faSLior David if (!vif->privacy) 1399230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1400e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1401e00243faSLior David &cmd, sizeof(cmd), 14022a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 14032a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 140441d6b093SVladimir Kondratiev if (rc) 140541d6b093SVladimir Kondratiev goto out_free; 140641d6b093SVladimir Kondratiev 140741d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 140841d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 140941d6b093SVladimir Kondratiev reply.cmd.status); 141041d6b093SVladimir Kondratiev rc = -EINVAL; 141141d6b093SVladimir Kondratiev goto out_free; 141241d6b093SVladimir Kondratiev } 141341d6b093SVladimir Kondratiev 1414dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1415dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1416e00243faSLior David txdata->mid = vif->mid; 141741d6b093SVladimir Kondratiev txdata->enabled = 1; 1418dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 141941d6b093SVladimir Kondratiev 142041d6b093SVladimir Kondratiev return 0; 142141d6b093SVladimir Kondratiev out_free: 1422875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1423230d8442SVladimir Kondratiev txdata->enabled = 0; 1424230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1425875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 142696c93589SGidon Studinski wil_vring_free(wil, vring); 142741d6b093SVladimir Kondratiev out: 142841d6b093SVladimir Kondratiev 142941d6b093SVladimir Kondratiev return rc; 143041d6b093SVladimir Kondratiev } 143141d6b093SVladimir Kondratiev 143210590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1433e00243faSLior David struct wil6210_vif *vif, 14342be7d22fSVladimir Kondratiev struct sk_buff *skb) 14352be7d22fSVladimir Kondratiev { 14366d1ba32cSAhmad Masri int i, cid; 14376d1ba32cSAhmad Masri const u8 *da = wil_skb_get_da(skb); 143896c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 14392be7d22fSVladimir Kondratiev 14406d1ba32cSAhmad Masri cid = wil_find_cid(wil, vif->mid, da); 14416d1ba32cSAhmad Masri 1442ddf7afddSAhmad Masri if (cid < 0 || cid >= wil->max_assoc_sta) 14433df2cd36SVladimir Kondratiev return NULL; 14443df2cd36SVladimir Kondratiev 14453df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 144696c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 144710590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 144810590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1449230d8442SVladimir Kondratiev continue; 145010590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 145110590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 145210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 14538fe59627SVladimir Kondratiev 1454af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 14556d1ba32cSAhmad Masri da, i); 1456b729aaf0SMaya Erez if (v->va && txdata->enabled) { 14572be7d22fSVladimir Kondratiev return v; 14583df2cd36SVladimir Kondratiev } else { 1459af3db60aSLazar Alexei wil_dbg_txrx(wil, 1460af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1461af3db60aSLazar Alexei i); 14623df2cd36SVladimir Kondratiev return NULL; 14633df2cd36SVladimir Kondratiev } 14643df2cd36SVladimir Kondratiev } 14653df2cd36SVladimir Kondratiev } 14662be7d22fSVladimir Kondratiev 14672be7d22fSVladimir Kondratiev return NULL; 14682be7d22fSVladimir Kondratiev } 14692be7d22fSVladimir Kondratiev 14709202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 14719202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 147254ed90a8SVladimir Kondratiev 147310590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1474e00243faSLior David struct wil6210_vif *vif, 147554ed90a8SVladimir Kondratiev struct sk_buff *skb) 147654ed90a8SVladimir Kondratiev { 147710590c6aSGidon Studinski struct wil_ring *ring; 147854ed90a8SVladimir Kondratiev int i; 147954ed90a8SVladimir Kondratiev u8 cid; 148010590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 148196c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 148254ed90a8SVladimir Kondratiev 148354ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 148454ed90a8SVladimir Kondratiev * for the AP we connected to. 1485230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 148654ed90a8SVladimir Kondratiev */ 148796c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 148810590c6aSGidon Studinski ring = &wil->ring_tx[i]; 148910590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 149010590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 149154ed90a8SVladimir Kondratiev continue; 149254ed90a8SVladimir Kondratiev 149310590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1494ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 149541d6b093SVladimir Kondratiev continue; 149641d6b093SVladimir Kondratiev 149710590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 149810590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1499230d8442SVladimir Kondratiev continue; 150054ed90a8SVladimir Kondratiev 150154ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 150254ed90a8SVladimir Kondratiev 150310590c6aSGidon Studinski return ring; 150454ed90a8SVladimir Kondratiev } 150554ed90a8SVladimir Kondratiev 150610590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 150754ed90a8SVladimir Kondratiev 150854ed90a8SVladimir Kondratiev return NULL; 150954ed90a8SVladimir Kondratiev } 151054ed90a8SVladimir Kondratiev 151170812421SVladimir Kondratiev /* Use one of 2 strategies: 151270812421SVladimir Kondratiev * 151370812421SVladimir Kondratiev * 1. New (real broadcast): 151470812421SVladimir Kondratiev * use dedicated broadcast vring 151570812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 151670812421SVladimir Kondratiev * Find 1-st vring and return it; 151770812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 151870812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 151970812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 152070812421SVladimir Kondratiev * - for PBSS 152170812421SVladimir Kondratiev */ 152210590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1523e00243faSLior David struct wil6210_vif *vif, 1524fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1525fb3cac57SVladimir Kondratiev { 152610590c6aSGidon Studinski struct wil_ring *v; 152710590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 152810590c6aSGidon Studinski int i = vif->bcast_ring; 1529fb3cac57SVladimir Kondratiev 153041d6b093SVladimir Kondratiev if (i < 0) 153141d6b093SVladimir Kondratiev return NULL; 153210590c6aSGidon Studinski v = &wil->ring_tx[i]; 153310590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1534b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1535fb3cac57SVladimir Kondratiev return NULL; 153610590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 153710590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1538230d8442SVladimir Kondratiev return NULL; 1539fb3cac57SVladimir Kondratiev 1540fb3cac57SVladimir Kondratiev return v; 1541fb3cac57SVladimir Kondratiev } 1542fb3cac57SVladimir Kondratiev 154370812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 154470812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 154570812421SVladimir Kondratiev { 15466d1ba32cSAhmad Masri u8 *da = wil_skb_get_da(skb); 154710590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 154870812421SVladimir Kondratiev 15496d1ba32cSAhmad Masri ether_addr_copy(da, wil->sta[cid].addr); 155070812421SVladimir Kondratiev } 155170812421SVladimir Kondratiev 155210590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1553e00243faSLior David struct wil6210_vif *vif, 155470812421SVladimir Kondratiev struct sk_buff *skb) 155570812421SVladimir Kondratiev { 155610590c6aSGidon Studinski struct wil_ring *v, *v2; 155770812421SVladimir Kondratiev struct sk_buff *skb2; 155870812421SVladimir Kondratiev int i; 155970812421SVladimir Kondratiev u8 cid; 15606d1ba32cSAhmad Masri const u8 *src = wil_skb_get_sa(skb); 156110590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 156296c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 156370812421SVladimir Kondratiev 156470812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 156596c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 156610590c6aSGidon Studinski v = &wil->ring_tx[i]; 156710590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1568e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 156970812421SVladimir Kondratiev continue; 157070812421SVladimir Kondratiev 157110590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1572ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 157370812421SVladimir Kondratiev continue; 157410590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 157510590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 157670812421SVladimir Kondratiev continue; 157770812421SVladimir Kondratiev 157870812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 157970812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 158070812421SVladimir Kondratiev continue; 158170812421SVladimir Kondratiev 158270812421SVladimir Kondratiev goto found; 158370812421SVladimir Kondratiev } 158470812421SVladimir Kondratiev 158570812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 158670812421SVladimir Kondratiev 158770812421SVladimir Kondratiev return NULL; 158870812421SVladimir Kondratiev 158970812421SVladimir Kondratiev found: 159070812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 159170812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 159270812421SVladimir Kondratiev 159370812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 159470812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 159510590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 159610590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1597e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 159870812421SVladimir Kondratiev continue; 159910590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1600ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 160170812421SVladimir Kondratiev continue; 160210590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 160310590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 160470812421SVladimir Kondratiev continue; 160570812421SVladimir Kondratiev 160670812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 160770812421SVladimir Kondratiev continue; 160870812421SVladimir Kondratiev 160970812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 161070812421SVladimir Kondratiev if (skb2) { 161170812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 161270812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 16139202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 161466449740SLior David /* successful call to wil_tx_ring takes skb2 ref */ 161566449740SLior David dev_kfree_skb_any(skb2); 161670812421SVladimir Kondratiev } else { 161770812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 161870812421SVladimir Kondratiev } 161970812421SVladimir Kondratiev } 162070812421SVladimir Kondratiev 162170812421SVladimir Kondratiev return v; 162270812421SVladimir Kondratiev } 162370812421SVladimir Kondratiev 1624c236658fSVladimir Kondratiev static inline 1625c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1626c236658fSVladimir Kondratiev { 16273d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1628c236658fSVladimir Kondratiev } 1629c236658fSVladimir Kondratiev 16303d4bde15SVladimir Kondratiev /** 16313d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 16323d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 16333d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 16343d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 16353d4bde15SVladimir Kondratiev */ 16363d4bde15SVladimir Kondratiev 16373d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 16383d4bde15SVladimir Kondratiev struct sk_buff *skb, 16393d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 16403d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1641504937d4SKirshenbaum Erez { 16423d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 16433d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 16443d4bde15SVladimir Kondratiev 16453d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 16463d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 16473d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 16483d4bde15SVladimir Kondratiev 16493d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 16503d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 16513d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 16523d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 16533d4bde15SVladimir Kondratiev 16543d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 16553d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 16563d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 16573d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 16583d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 16593d4bde15SVladimir Kondratiev } 16603d4bde15SVladimir Kondratiev 16613d4bde15SVladimir Kondratiev /** 16623d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 16633d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 16643d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 16653d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 16663d4bde15SVladimir Kondratiev * 16673d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 16683d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 16693d4bde15SVladimir Kondratiev */ 16703d4bde15SVladimir Kondratiev 16713d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 16723d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1673504937d4SKirshenbaum Erez int protocol; 1674504937d4SKirshenbaum Erez 1675504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1676504937d4SKirshenbaum Erez return 0; 1677504937d4SKirshenbaum Erez 1678df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1679df2d08eeSVladimir Kondratiev 1680504937d4SKirshenbaum Erez switch (skb->protocol) { 1681504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1682504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1683df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1684504937d4SKirshenbaum Erez break; 1685504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1686504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1687504937d4SKirshenbaum Erez break; 1688504937d4SKirshenbaum Erez default: 1689504937d4SKirshenbaum Erez return -EINVAL; 1690504937d4SKirshenbaum Erez } 1691504937d4SKirshenbaum Erez 1692504937d4SKirshenbaum Erez switch (protocol) { 1693504937d4SKirshenbaum Erez case IPPROTO_TCP: 1694504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1695504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1696504937d4SKirshenbaum Erez d->dma.d0 |= 1697504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1698504937d4SKirshenbaum Erez break; 1699504937d4SKirshenbaum Erez case IPPROTO_UDP: 1700504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1701504937d4SKirshenbaum Erez d->dma.d0 |= 1702504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1703504937d4SKirshenbaum Erez break; 1704504937d4SKirshenbaum Erez default: 1705504937d4SKirshenbaum Erez return -EINVAL; 1706504937d4SKirshenbaum Erez } 1707504937d4SKirshenbaum Erez 1708504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1709504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1710504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1711504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1712504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1713504937d4SKirshenbaum Erez 1714504937d4SKirshenbaum Erez return 0; 1715504937d4SKirshenbaum Erez } 1716504937d4SKirshenbaum Erez 17173d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 17183d4bde15SVladimir Kondratiev { 17193d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 17203d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 17213d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 17223d4bde15SVladimir Kondratiev } 17233d4bde15SVladimir Kondratiev 17243d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 17253d4bde15SVladimir Kondratiev { 17263d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 17273d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 17283d4bde15SVladimir Kondratiev } 17293d4bde15SVladimir Kondratiev 1730e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 173110590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 17323d4bde15SVladimir Kondratiev { 17333d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17343d4bde15SVladimir Kondratiev 17353d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 17363d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 17373d4bde15SVladimir Kondratiev *_first_desc = NULL; 17383d4bde15SVladimir Kondratiev 17393d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 17403d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 17413d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 17423d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 17433d4bde15SVladimir Kondratiev 17443d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 17453d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 17463d4bde15SVladimir Kondratiev 17473d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 17483d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 17493d4bde15SVladimir Kondratiev 17503d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 175110590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 17523d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 17533d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 17543d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 17553d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 175610590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 175710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 17583d4bde15SVladimir Kondratiev uint i = swhead; 17593d4bde15SVladimir Kondratiev dma_addr_t pa; 17603d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 17613d4bde15SVladimir Kondratiev int rem_data = mss; 17623d4bde15SVladimir Kondratiev int lenmss; 17633d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 17643d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 17653d4bde15SVladimir Kondratiev bool is_ipv4; 17663d4bde15SVladimir Kondratiev int tcp_hdr_len; 17673d4bde15SVladimir Kondratiev int skb_net_hdr_len; 17683d4bde15SVladimir Kondratiev int gso_type; 1769e3d2ed94SHamad Kadmany int rc = -EINVAL; 17703d4bde15SVladimir Kondratiev 1771af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1772af3db60aSLazar Alexei vring_index); 17733d4bde15SVladimir Kondratiev 17743d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 17753d4bde15SVladimir Kondratiev return -EINVAL; 17763d4bde15SVladimir Kondratiev 17773d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 17783d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 17793d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 17803d4bde15SVladimir Kondratiev * this is the initial check only. 17813d4bde15SVladimir Kondratiev */ 17823d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 17833d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 17843d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 17853d4bde15SVladimir Kondratiev vring_index, min_desc_required); 17863d4bde15SVladimir Kondratiev return -ENOMEM; 17873d4bde15SVladimir Kondratiev } 17883d4bde15SVladimir Kondratiev 17893d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 17903d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 17913d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 17923d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 17933d4bde15SVladimir Kondratiev 17943d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 17953d4bde15SVladimir Kondratiev switch (gso_type) { 17963d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 17973d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 17983d4bde15SVladimir Kondratiev * as required by the offloading doc 17993d4bde15SVladimir Kondratiev */ 18003d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 18013d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 18023d4bde15SVladimir Kondratiev is_ipv4 = true; 18033d4bde15SVladimir Kondratiev break; 18043d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 18053d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 18063d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 18073d4bde15SVladimir Kondratiev is_ipv4 = false; 18083d4bde15SVladimir Kondratiev break; 18093d4bde15SVladimir Kondratiev default: 18103d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 18113d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 18123d4bde15SVladimir Kondratiev */ 18133d4bde15SVladimir Kondratiev return -EINVAL; 18143d4bde15SVladimir Kondratiev } 18153d4bde15SVladimir Kondratiev 18163d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 18173d4bde15SVladimir Kondratiev return -EINVAL; 18183d4bde15SVladimir Kondratiev 18193d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 18203d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 18213d4bde15SVladimir Kondratiev */ 18223d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 18233d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 18243d4bde15SVladimir Kondratiev 182510590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 18263d4bde15SVladimir Kondratiev 18273d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 18283d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 18293d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 18303d4bde15SVladimir Kondratiev goto err_exit; 18313d4bde15SVladimir Kondratiev } 18323d4bde15SVladimir Kondratiev 18339202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 18349202d7b6SMaya Erez hdrlen, vring_index); 18353d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 18363d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 18373d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 18383d4bde15SVladimir Kondratiev 18393d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 18403d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 18413d4bde15SVladimir Kondratiev 18423d4bde15SVladimir Kondratiev descs_used++; 18433d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 18443d4bde15SVladimir Kondratiev 18453d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 18463d4bde15SVladimir Kondratiev if (headlen) { 18473d4bde15SVladimir Kondratiev len = headlen; 18483d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 18493d4bde15SVladimir Kondratiev len); 18503d4bde15SVladimir Kondratiev } else { 18513d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 1852d7840976SMatthew Wilcox (Oracle) len = skb_frag_size(frag); 18533d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 18543d4bde15SVladimir Kondratiev } 18553d4bde15SVladimir Kondratiev 18563d4bde15SVladimir Kondratiev while (len) { 18573d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 18583d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 18593d4bde15SVladimir Kondratiev len, rem_data, descs_used); 18603d4bde15SVladimir Kondratiev 18613d4bde15SVladimir Kondratiev if (descs_used == avail) { 1862e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1863e3d2ed94SHamad Kadmany rc = -ENOMEM; 1864e3d2ed94SHamad Kadmany goto mem_error; 18653d4bde15SVladimir Kondratiev } 18663d4bde15SVladimir Kondratiev 18673d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 18683d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 18693d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 18703d4bde15SVladimir Kondratiev 18713d4bde15SVladimir Kondratiev if (!headlen) { 18723d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 1873d7840976SMatthew Wilcox (Oracle) skb_frag_size(frag) - len, 1874d7840976SMatthew Wilcox (Oracle) lenmss, DMA_TO_DEVICE); 18753d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 18763d4bde15SVladimir Kondratiev } else { 18773d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 18783d4bde15SVladimir Kondratiev skb->data + 18793d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 18803d4bde15SVladimir Kondratiev lenmss, 18813d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 18823d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 18833d4bde15SVladimir Kondratiev headlen -= lenmss; 18843d4bde15SVladimir Kondratiev } 18853d4bde15SVladimir Kondratiev 1886e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1887e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1888e3d2ed94SHamad Kadmany goto mem_error; 1889e3d2ed94SHamad Kadmany } 18903d4bde15SVladimir Kondratiev 189110590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 18923d4bde15SVladimir Kondratiev 18933d4bde15SVladimir Kondratiev if (!_first_desc) { 18943d4bde15SVladimir Kondratiev _first_desc = _desc; 18953d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 18963d4bde15SVladimir Kondratiev d = first_desc; 18973d4bde15SVladimir Kondratiev } else { 18983d4bde15SVladimir Kondratiev d = &desc_mem; 18993d4bde15SVladimir Kondratiev } 19003d4bde15SVladimir Kondratiev 19019202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 19029202d7b6SMaya Erez pa, lenmss, vring_index); 19033d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 19043d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 19053d4bde15SVladimir Kondratiev skb_net_hdr_len); 19063d4bde15SVladimir Kondratiev 19073d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 19083d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 19093d4bde15SVladimir Kondratiev 19103d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 19113d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 19123d4bde15SVladimir Kondratiev len -= lenmss; 19133d4bde15SVladimir Kondratiev rem_data -= lenmss; 19143d4bde15SVladimir Kondratiev 19153d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 19163d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 19173d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 19183d4bde15SVladimir Kondratiev 19193d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 19203d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 19213d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 19223d4bde15SVladimir Kondratiev /* first segment include hdr desc for 19233d4bde15SVladimir Kondratiev * release 19243d4bde15SVladimir Kondratiev */ 19253d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 19263d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 19273d4bde15SVladimir Kondratiev sg_desc_cnt + 19283d4bde15SVladimir Kondratiev 1); 19293d4bde15SVladimir Kondratiev hdr_compensation_need = false; 19303d4bde15SVladimir Kondratiev } else { 19313d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 19323d4bde15SVladimir Kondratiev sg_desc_cnt); 19333d4bde15SVladimir Kondratiev } 19343d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 19353d4bde15SVladimir Kondratiev 19363d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 19373d4bde15SVladimir Kondratiev 19383d4bde15SVladimir Kondratiev /* first descriptor may also be the last 19393d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 19403d4bde15SVladimir Kondratiev * it twice 19413d4bde15SVladimir Kondratiev */ 19423d4bde15SVladimir Kondratiev if (first_desc != d) 19433d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 19443d4bde15SVladimir Kondratiev 19453d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 19463d4bde15SVladimir Kondratiev * of this TS processing 19473d4bde15SVladimir Kondratiev */ 19483d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 19493d4bde15SVladimir Kondratiev *_desc = *d; 19503d4bde15SVladimir Kondratiev 19513d4bde15SVladimir Kondratiev rem_data = mss; 19523d4bde15SVladimir Kondratiev _first_desc = NULL; 19533d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 19543d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 19553d4bde15SVladimir Kondratiev *_desc = *d; 19563d4bde15SVladimir Kondratiev } 19573d4bde15SVladimir Kondratiev } 19583d4bde15SVladimir Kondratiev 19599c646597SAlexei Avshalom Lazar if (!_desc) 19609c646597SAlexei Avshalom Lazar goto mem_error; 19619c646597SAlexei Avshalom Lazar 19623d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 19633d4bde15SVladimir Kondratiev * in this case d pointer is invalid 19643d4bde15SVladimir Kondratiev */ 19653d4bde15SVladimir Kondratiev if (_first_desc == _desc) 19663d4bde15SVladimir Kondratiev d = first_desc; 19673d4bde15SVladimir Kondratiev 19683d4bde15SVladimir Kondratiev /* Last data descriptor */ 19693d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 19703d4bde15SVladimir Kondratiev *_desc = *d; 19713d4bde15SVladimir Kondratiev 19723d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 19733d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 19743d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 19753d4bde15SVladimir Kondratiev 19763d4bde15SVladimir Kondratiev /* hold reference to skb 19773d4bde15SVladimir Kondratiev * to prevent skb release before accounting 19783d4bde15SVladimir Kondratiev * in case of immediate "tx done" 19793d4bde15SVladimir Kondratiev */ 19803d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 19813d4bde15SVladimir Kondratiev 19823d4bde15SVladimir Kondratiev /* performance monitoring */ 198310590c6aSGidon Studinski used = wil_ring_used_tx(vring); 198410590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 19853d4bde15SVladimir Kondratiev used, used + descs_used)) { 19863d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 19873d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 19883d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 19893d4bde15SVladimir Kondratiev } 19903d4bde15SVladimir Kondratiev 1991eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1992eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1993eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1994eb26cff1SMaya Erez * skb before it was completed. 1995eb26cff1SMaya Erez */ 1996eb26cff1SMaya Erez wmb(); 1997eb26cff1SMaya Erez 19983d4bde15SVladimir Kondratiev /* advance swhead */ 199910590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 2000e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 20013d4bde15SVladimir Kondratiev 20023d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 20033d4bde15SVladimir Kondratiev * committing them to HW 20043d4bde15SVladimir Kondratiev */ 20053d4bde15SVladimir Kondratiev wmb(); 20063d4bde15SVladimir Kondratiev 2007a24a3d6aSDedy Lansky if (wil->tx_latency) 2008a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 2009a24a3d6aSDedy Lansky else 2010a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 2011a24a3d6aSDedy Lansky 2012b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 20133d4bde15SVladimir Kondratiev return 0; 20143d4bde15SVladimir Kondratiev 2015e3d2ed94SHamad Kadmany mem_error: 20163d4bde15SVladimir Kondratiev while (descs_used > 0) { 20173d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 20183d4bde15SVladimir Kondratiev 2019a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 202010590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 202110590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 20223d4bde15SVladimir Kondratiev *d = *_desc; 20233d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 20243d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 20259202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 20263d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 20273d4bde15SVladimir Kondratiev descs_used--; 20283d4bde15SVladimir Kondratiev } 20293d4bde15SVladimir Kondratiev err_exit: 2030e3d2ed94SHamad Kadmany return rc; 20313d4bde15SVladimir Kondratiev } 20323d4bde15SVladimir Kondratiev 20339202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 20349202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 20352be7d22fSVladimir Kondratiev { 20362be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 203768ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 203868ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20399202d7b6SMaya Erez u32 swhead = ring->swhead; 20409202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 20412be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 2042504937d4SKirshenbaum Erez uint f = 0; 20439202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 20449202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 20452be7d22fSVladimir Kondratiev uint i = swhead; 20462be7d22fSVladimir Kondratiev dma_addr_t pa; 20470436fd9aSVladimir Shulman int used; 20489202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 204941d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 20502be7d22fSVladimir Kondratiev 205110590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 20529202d7b6SMaya Erez skb->len, ring_index, nr_frags); 20532be7d22fSVladimir Kondratiev 20545933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 20555933a06dSVladimir Kondratiev return -EINVAL; 20565933a06dSVladimir Kondratiev 205733c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 205870801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 20595b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 20609202d7b6SMaya Erez ring_index, 1 + nr_frags); 20612be7d22fSVladimir Kondratiev return -ENOMEM; 20622be7d22fSVladimir Kondratiev } 20639202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 20642be7d22fSVladimir Kondratiev 20658fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 20662be7d22fSVladimir Kondratiev 20679202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 20685b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 20697743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 20702be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 20712be7d22fSVladimir Kondratiev 20722be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 20732be7d22fSVladimir Kondratiev return -EINVAL; 20749202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 20752be7d22fSVladimir Kondratiev /* 1-st segment */ 20769202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 20779202d7b6SMaya Erez ring_index); 207841d6b093SVladimir Kondratiev if (unlikely(mcast)) { 207941d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 2080230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 208141d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 208241d6b093SVladimir Kondratiev } 2083504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 20843d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 20855b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 20869202d7b6SMaya Erez ring_index); 2087504937d4SKirshenbaum Erez goto dma_error; 2088504937d4SKirshenbaum Erez } 2089504937d4SKirshenbaum Erez 20909202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 20913d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 209268ada71eSVladimir Kondratiev 20932be7d22fSVladimir Kondratiev /* middle segments */ 2094504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 2095d7840976SMatthew Wilcox (Oracle) const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 20962be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 20978fe59627SVladimir Kondratiev 2098e59d16c0SVladimir Kondratiev *_d = *d; 20999202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 21005b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 21015b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 21029202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 21039202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 21042be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 21052be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 2106e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 2107e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 21089202d7b6SMaya Erez ring_index); 21092be7d22fSVladimir Kondratiev goto dma_error; 2110e3d2ed94SHamad Kadmany } 21119202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 21129202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 21139202d7b6SMaya Erez pa, len, ring_index); 2114c236658fSVladimir Kondratiev /* no need to check return code - 2115c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 2116c236658fSVladimir Kondratiev * it will succeed here too 2117c236658fSVladimir Kondratiev */ 21183d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 21192be7d22fSVladimir Kondratiev } 21202be7d22fSVladimir Kondratiev /* for the last seg only */ 21212be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 2122668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 21232be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 212468ada71eSVladimir Kondratiev *_d = *d; 21259202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 21265b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 21275b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 21282be7d22fSVladimir Kondratiev 21296cdadd4dSVladimir Kondratiev /* hold reference to skb 21306cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 21316cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 21326cdadd4dSVladimir Kondratiev */ 21339202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 21346cdadd4dSVladimir Kondratiev 21350436fd9aSVladimir Shulman /* performance monitoring */ 21369202d7b6SMaya Erez used = wil_ring_used_tx(ring); 213710590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 21380436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 21397c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 21400436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 21419202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 21420436fd9aSVladimir Shulman } 21437c0acf86SVladimir Kondratiev 2144eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 2145eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 2146eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 2147eb26cff1SMaya Erez * skb before it was completed. 2148eb26cff1SMaya Erez */ 2149eb26cff1SMaya Erez wmb(); 2150eb26cff1SMaya Erez 21512be7d22fSVladimir Kondratiev /* advance swhead */ 21529202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 21539202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 21549202d7b6SMaya Erez ring->swhead); 21559202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 21563d4bde15SVladimir Kondratiev 21573d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 21583d4bde15SVladimir Kondratiev * committing them to HW 21593d4bde15SVladimir Kondratiev */ 21603d4bde15SVladimir Kondratiev wmb(); 21613d4bde15SVladimir Kondratiev 2162a24a3d6aSDedy Lansky if (wil->tx_latency) 2163a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 2164a24a3d6aSDedy Lansky else 2165a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 2166a24a3d6aSDedy Lansky 21679202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 21682be7d22fSVladimir Kondratiev 21692be7d22fSVladimir Kondratiev return 0; 21702be7d22fSVladimir Kondratiev dma_error: 21712be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 2172c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 2173c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 2174c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 21757e594444SVladimir Kondratiev 21769202d7b6SMaya Erez i = (swhead + f) % ring->size; 21779202d7b6SMaya Erez ctx = &ring->ctx[i]; 21789202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 217968ada71eSVladimir Kondratiev *d = *_d; 218068ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 21819202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21829202d7b6SMaya Erez (union wil_tx_desc *)d, 21839202d7b6SMaya Erez ctx); 2184f88f113aSVladimir Kondratiev 2185f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 21862be7d22fSVladimir Kondratiev } 21872be7d22fSVladimir Kondratiev 21882be7d22fSVladimir Kondratiev return -EINVAL; 21892be7d22fSVladimir Kondratiev } 21902be7d22fSVladimir Kondratiev 21919202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 21929202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 21935933a06dSVladimir Kondratiev { 21949202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 219510590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 21965933a06dSVladimir Kondratiev int rc; 21975933a06dSVladimir Kondratiev 21985933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 21993d4bde15SVladimir Kondratiev 2200fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2201fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 2202fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 2203fe9ee51eSMaya Erez wil_dbg_txrx(wil, 2204fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 2205fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 2206fe9ee51eSMaya Erez return -EINVAL; 2207fe9ee51eSMaya Erez } 2208fe9ee51eSMaya Erez 22099202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 22109202d7b6SMaya Erez (wil, vif, ring, skb); 22113d4bde15SVladimir Kondratiev 22125933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 22133d4bde15SVladimir Kondratiev 22145933a06dSVladimir Kondratiev return rc; 22155933a06dSVladimir Kondratiev } 22165933a06dSVladimir Kondratiev 2217f9e3033fSDedy Lansky /** 2218f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 22195bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 2220f9e3033fSDedy Lansky * 2221f9e3033fSDedy Lansky * This function does one of two checks: 2222f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 2223f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 2224f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 2225f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 2226f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 2227f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 2228f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 2229f9e3033fSDedy Lansky * 2230f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 2231f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 2232f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 2233f9e3033fSDedy Lansky */ 2234f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 22355bd60982SLior David struct wil6210_vif *vif, 223610590c6aSGidon Studinski struct wil_ring *ring, 2237f9e3033fSDedy Lansky bool check_stop) 2238f9e3033fSDedy Lansky { 2239f9e3033fSDedy Lansky int i; 2240df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 2241f9e3033fSDedy Lansky 22425bd60982SLior David if (unlikely(!vif)) 22435bd60982SLior David return; 2244f9e3033fSDedy Lansky 224510590c6aSGidon Studinski if (ring) 22465bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 224710590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 22485bd60982SLior David vif->net_queue_stopped); 22495bd60982SLior David else 22505bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 22515bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 22525bd60982SLior David 22530439a5e0SDedy Lansky if (ring && drop_if_ring_full) 22540439a5e0SDedy Lansky /* no need to stop/wake net queues */ 22550439a5e0SDedy Lansky return; 22560439a5e0SDedy Lansky 22575bd60982SLior David if (check_stop == vif->net_queue_stopped) 2258f9e3033fSDedy Lansky /* net queues already in desired state */ 2259f9e3033fSDedy Lansky return; 2260f9e3033fSDedy Lansky 2261f9e3033fSDedy Lansky if (check_stop) { 226210590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 2263f9e3033fSDedy Lansky /* not enough room in the vring */ 22645bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 22655bd60982SLior David vif->net_queue_stopped = true; 2266f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 2267f9e3033fSDedy Lansky } 2268f9e3033fSDedy Lansky return; 2269f9e3033fSDedy Lansky } 2270f9e3033fSDedy Lansky 2271fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 2272fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2273fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 2274fe9ee51eSMaya Erez return; 2275fe9ee51eSMaya Erez 2276f9e3033fSDedy Lansky /* check wake */ 2277df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 227810590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 227910590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 2280f9e3033fSDedy Lansky 228110590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 228210590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 2283f9e3033fSDedy Lansky continue; 2284f9e3033fSDedy Lansky 228510590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 228610590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 228710590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 2288f9e3033fSDedy Lansky return; 2289f9e3033fSDedy Lansky } 2290f9e3033fSDedy Lansky } 2291f9e3033fSDedy Lansky 229210590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 229310590c6aSGidon Studinski /* enough room in the ring */ 2294f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 22955bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 22965bd60982SLior David vif->net_queue_stopped = false; 2297f9e3033fSDedy Lansky } 2298f9e3033fSDedy Lansky } 2299f9e3033fSDedy Lansky 23005bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 230110590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2302f9e3033fSDedy Lansky { 2303f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 230410590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2305f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2306f9e3033fSDedy Lansky } 2307f9e3033fSDedy Lansky 23085bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 230910590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2310f9e3033fSDedy Lansky { 2311f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 231210590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2313f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2314f9e3033fSDedy Lansky } 2315f9e3033fSDedy Lansky 23162be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 23172be7d22fSVladimir Kondratiev { 2318e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2319e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 23206d1ba32cSAhmad Masri const u8 *da = wil_skb_get_da(skb); 23216d1ba32cSAhmad Masri bool bcast = is_multicast_ether_addr(da); 23229202d7b6SMaya Erez struct wil_ring *ring; 2323aa27deaaSVladimir Kondratiev static bool pr_once_fw; 23242be7d22fSVladimir Kondratiev int rc; 23252be7d22fSVladimir Kondratiev 2326af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 232733c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2328aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 23292be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2330aa27deaaSVladimir Kondratiev pr_once_fw = true; 2331aa27deaaSVladimir Kondratiev } 23322be7d22fSVladimir Kondratiev goto drop; 23332be7d22fSVladimir Kondratiev } 23345bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 23355bd60982SLior David wil_dbg_ratelimited(wil, 23365bd60982SLior David "VIF not connected, packet dropped\n"); 23372be7d22fSVladimir Kondratiev goto drop; 23382be7d22fSVladimir Kondratiev } 2339e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 23402be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 23412be7d22fSVladimir Kondratiev goto drop; 23422be7d22fSVladimir Kondratiev } 2343aa27deaaSVladimir Kondratiev pr_once_fw = false; 2344d58db4e4SVladimir Kondratiev 23452be7d22fSVladimir Kondratiev /* find vring */ 2346e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2347a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 23489202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2349a895cb8bSLior David } else if (bcast) { 2350e00243faSLior David if (vif->pbss) 2351a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2352a895cb8bSLior David * all stations VRINGs 2353a895cb8bSLior David */ 23549202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2355e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2356a895cb8bSLior David /* AP has a dedicated bcast VRING */ 23579202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2358a895cb8bSLior David else 2359a895cb8bSLior David /* unexpected combination, fallback to duplicating 2360a895cb8bSLior David * the skb in all stations VRINGs 2361a895cb8bSLior David */ 23629202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2363a895cb8bSLior David } else { 2364a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 23659202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 236654ed90a8SVladimir Kondratiev } 23679202d7b6SMaya Erez if (unlikely(!ring)) { 23686d1ba32cSAhmad Masri wil_dbg_txrx(wil, "No Tx RING found for %pM\n", da); 23692be7d22fSVladimir Kondratiev goto drop; 23702be7d22fSVladimir Kondratiev } 23712be7d22fSVladimir Kondratiev /* set up vring entry */ 23729202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2373d58db4e4SVladimir Kondratiev 23742be7d22fSVladimir Kondratiev switch (rc) { 23752be7d22fSVladimir Kondratiev case 0: 2376f9e3033fSDedy Lansky /* shall we stop net queues? */ 23779202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2378795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 23792be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 23802be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 23812be7d22fSVladimir Kondratiev case -ENOMEM: 23820439a5e0SDedy Lansky if (drop_if_ring_full) 23830439a5e0SDedy Lansky goto drop; 23842be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 23852be7d22fSVladimir Kondratiev default: 2386afda8bb5SVladimir Kondratiev break; /* goto drop; */ 23872be7d22fSVladimir Kondratiev } 23882be7d22fSVladimir Kondratiev drop: 23892be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 23902be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 23912be7d22fSVladimir Kondratiev 23922be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 23932be7d22fSVladimir Kondratiev } 23942be7d22fSVladimir Kondratiev 2395a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2396a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2397a24a3d6aSDedy Lansky { 2398a24a3d6aSDedy Lansky int skb_time_us; 2399a24a3d6aSDedy Lansky int bin; 2400a24a3d6aSDedy Lansky 2401a24a3d6aSDedy Lansky if (!wil->tx_latency) 2402a24a3d6aSDedy Lansky return; 2403a24a3d6aSDedy Lansky 2404a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2405a24a3d6aSDedy Lansky return; 2406a24a3d6aSDedy Lansky 2407a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2408a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2409a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2410a24a3d6aSDedy Lansky 2411a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2412a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2413a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2414a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2415a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2416a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2417a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2418a24a3d6aSDedy Lansky } 2419a24a3d6aSDedy Lansky 24202be7d22fSVladimir Kondratiev /** 24212be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 24222be7d22fSVladimir Kondratiev * 2423e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2424e0287c4aSVladimir Kondratiev * 24252be7d22fSVladimir Kondratiev * Safe to call from IRQ 24262be7d22fSVladimir Kondratiev */ 24275bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 24282be7d22fSVladimir Kondratiev { 24295bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 24305bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 24312be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 243210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 243310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2434e0287c4aSVladimir Kondratiev int done = 0; 243510590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 243641d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2437c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 24380436fd9aSVladimir Shulman int used_before_complete; 24390436fd9aSVladimir Shulman int used_new; 24402be7d22fSVladimir Kondratiev 244133c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 24422be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2443e0287c4aSVladimir Kondratiev return 0; 24442be7d22fSVladimir Kondratiev } 24452be7d22fSVladimir Kondratiev 244633c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2447097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2448097638a0SVladimir Kondratiev return 0; 2449097638a0SVladimir Kondratiev } 2450097638a0SVladimir Kondratiev 2451af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 24522be7d22fSVladimir Kondratiev 245310590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 24540436fd9aSVladimir Shulman 2455ddf7afddSAhmad Masri if (cid < wil->max_assoc_sta) 245641d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 245741d6b093SVladimir Kondratiev 245810590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2459c236658fSVladimir Kondratiev int new_swtail; 2460c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2461c236658fSVladimir Kondratiev /** 2462c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 24633d4bde15SVladimir Kondratiev * last fragment. look for it. 24643d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2465c236658fSVladimir Kondratiev */ 2466c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2467c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2468c236658fSVladimir Kondratiev 246910590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 247033c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2471c236658fSVladimir Kondratiev break; 2472c236658fSVladimir Kondratiev 2473c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2474c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 24754de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 24767e594444SVladimir Kondratiev u16 dmalen; 247776dfa4b7SVladimir Kondratiev struct sk_buff *skb; 247876dfa4b7SVladimir Kondratiev 247976dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 248076dfa4b7SVladimir Kondratiev skb = ctx->skb; 248110590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 24824de41befSVladimir Kondratiev 248368ada71eSVladimir Kondratiev *d = *_d; 24844de41befSVladimir Kondratiev 24857e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 248698658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 248798658095SVladimir Kondratiev d->dma.error); 24887743882dSVladimir Kondratiev wil_dbg_txrx(wil, 24895b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 24905b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 24915b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 24925b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 24932be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 24942be7d22fSVladimir Kondratiev 24959202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 24969202d7b6SMaya Erez (union wil_tx_desc *)d, 24979202d7b6SMaya Erez ctx); 2498f88f113aSVladimir Kondratiev 24992be7d22fSVladimir Kondratiev if (skb) { 250033c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2501795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2502795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 250341d6b093SVladimir Kondratiev if (stats) { 250441d6b093SVladimir Kondratiev stats->tx_packets++; 2505c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2506a24a3d6aSDedy Lansky 2507a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2508a24a3d6aSDedy Lansky &wil->sta[cid]); 250941d6b093SVladimir Kondratiev } 2510795ce734SVladimir Kondratiev } else { 2511795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 251241d6b093SVladimir Kondratiev if (stats) 2513c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2514795ce734SVladimir Kondratiev } 251542fe1e51SAhmad Masri 251642fe1e51SAhmad Masri if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 251742fe1e51SAhmad Masri wil_tx_complete_handle_eapol(vif, skb); 251842fe1e51SAhmad Masri 2519713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 25202be7d22fSVladimir Kondratiev } 2521f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2522eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 252310590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2524eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2525eb26cff1SMaya Erez * is completed. 2526eb26cff1SMaya Erez */ 2527eb26cff1SMaya Erez wmb(); 2528c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 252903269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 253003269c65SVladimir Kondratiev * so hardware will not try to process this desc., 253103269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 253203269c65SVladimir Kondratiev */ 253310590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2534e0287c4aSVladimir Kondratiev done++; 25352be7d22fSVladimir Kondratiev } 2536c236658fSVladimir Kondratiev } 253767c3e1b4SVladimir Kondratiev 25380436fd9aSVladimir Shulman /* performance monitoring */ 253910590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 254010590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 25410436fd9aSVladimir Shulman used_new, used_before_complete)) { 25420436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 25430436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 25447c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 25457c0acf86SVladimir Kondratiev } 254667c3e1b4SVladimir Kondratiev 2547f9e3033fSDedy Lansky /* shall we wake net queues? */ 2548f9e3033fSDedy Lansky if (done) 25495bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2550e0287c4aSVladimir Kondratiev 2551e0287c4aSVladimir Kondratiev return done; 25522be7d22fSVladimir Kondratiev } 255396c93589SGidon Studinski 255496c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 255596c93589SGidon Studinski { 255696c93589SGidon Studinski return 0; 255796c93589SGidon Studinski } 255896c93589SGidon Studinski 255996c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 256096c93589SGidon Studinski 25617be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 25627be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 25631bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 25647be13fc3SGidon Studinski { 25657be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 25667be13fc3SGidon Studinski 25677be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 2568bf0353a6SAhmad Masri *cid = wil_skb_get_cid(skb); 25697be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 25707be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 25717be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 25721bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 25737be13fc3SGidon Studinski } 25747be13fc3SGidon Studinski 257596c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 257696c93589SGidon Studinski { 257796c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 257896c93589SGidon Studinski wil_configure_interrupt_moderation; 257996c93589SGidon Studinski /* TX ops */ 25809202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 25819202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 25829202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 258396c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 258496c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 258596c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 258696c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 258796c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 2588b9010f10SAhmad Masri wil->txrx_ops.tx_ring_modify = wil_tx_vring_modify; 258996c93589SGidon Studinski /* RX ops */ 259096c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 25917be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 25927be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 25937be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 25947be13fc3SGidon Studinski wil_get_netif_rx_params; 25957be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2596e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 25977be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 259896c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 259996c93589SGidon Studinski } 2600