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 3752be7d22fSVladimir Kondratiev /** 3762be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 3772be7d22fSVladimir Kondratiev * 37833e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 37933e61169SVladimir Kondratiev * 3802be7d22fSVladimir Kondratiev * Safe to call from IRQ 3812be7d22fSVladimir Kondratiev */ 3822be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 38310590c6aSGidon Studinski struct wil_ring *vring) 3842be7d22fSVladimir Kondratiev { 3852be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 3865bd60982SLior David struct wil6210_vif *vif; 3875bd60982SLior David struct net_device *ndev; 38868ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 38968ada71eSVladimir Kondratiev struct vring_rx_desc *d; 3902be7d22fSVladimir Kondratiev struct sk_buff *skb; 3912be7d22fSVladimir Kondratiev dma_addr_t pa; 392c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 39352a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 3947e594444SVladimir Kondratiev u16 dmalen; 3952be7d22fSVladimir Kondratiev u8 ftype; 3965bd60982SLior David int cid, mid; 3973b282bc6SVladimir Kondratiev int i; 398c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 399c8b78b5fSVladimir Kondratiev 40033e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 40133e61169SVladimir Kondratiev 4023b282bc6SVladimir Kondratiev again: 40310590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4042be7d22fSVladimir Kondratiev return NULL; 4052be7d22fSVladimir Kondratiev 4063b282bc6SVladimir Kondratiev i = (int)vring->swhead; 40710590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 40833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4092be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4102be7d22fSVladimir Kondratiev return NULL; 4112be7d22fSVladimir Kondratiev } 4122be7d22fSVladimir Kondratiev 413148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 414148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 41510590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 416148416a9SVladimir Kondratiev if (!skb) { 417148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4183b282bc6SVladimir Kondratiev goto again; 419148416a9SVladimir Kondratiev } 42068ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 42168ada71eSVladimir Kondratiev *d = *_d; 42268ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 42368ada71eSVladimir Kondratiev 42468ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 42568ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 42668ada71eSVladimir Kondratiev 427148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 428148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 429a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 43068ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 43168ada71eSVladimir Kondratiev 4323b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4335bd60982SLior David mid = wil_rxdesc_mid(d); 4345bd60982SLior David vif = wil->vifs[mid]; 4355bd60982SLior David 4365bd60982SLior David if (unlikely(!vif)) { 4375bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4385bd60982SLior David mid); 4395bd60982SLior David kfree_skb(skb); 4405bd60982SLior David goto again; 4415bd60982SLior David } 4425bd60982SLior David ndev = vif_to_ndev(vif); 4433b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4443b282bc6SVladimir Kondratiev 44533c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 446e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4473b282bc6SVladimir Kondratiev stats->rx_large_frame++; 448110dea00SWei Yongjun kfree_skb(skb); 4493b282bc6SVladimir Kondratiev goto again; 450e270045bSVladimir Kondratiev } 4517e594444SVladimir Kondratiev skb_trim(skb, dmalen); 45233e61169SVladimir Kondratiev 4531cbbcb08SVladimir Kondratiev prefetch(skb->data); 4541cbbcb08SVladimir Kondratiev 455c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 456c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 457c0d37713SVladimir Kondratiev 458c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 459c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 460c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4612be7d22fSVladimir Kondratiev 4622be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4632be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 46433e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4652be7d22fSVladimir Kondratiev 4662be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4672be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4682be7d22fSVladimir Kondratiev return skb; 469a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4702be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4712be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4722be7d22fSVladimir Kondratiev */ 47368ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 47433c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 475a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 476a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 477a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 478a8313341SVladimir Kondratiev 479a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 480a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 481a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 4823b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 483a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 484a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 485a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 486a8313341SVladimir Kondratiev mid, cid, tid, seq); 4875bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 488a8313341SVladimir Kondratiev } else { 489a8313341SVladimir Kondratiev /* print again all info. One can enable only this 490a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 491a8313341SVladimir Kondratiev */ 492a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 493a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 494a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 495a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 496a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 497a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 498a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 499a8313341SVladimir Kondratiev } 5002be7d22fSVladimir Kondratiev kfree_skb(skb); 5013b282bc6SVladimir Kondratiev goto again; 5022be7d22fSVladimir Kondratiev } 5032be7d22fSVladimir Kondratiev 504c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5052be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5063b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5072be7d22fSVladimir Kondratiev kfree_skb(skb); 5083b282bc6SVladimir Kondratiev goto again; 5092be7d22fSVladimir Kondratiev } 5102be7d22fSVladimir Kondratiev 511504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 512504937d4SKirshenbaum Erez * and in case of error drop the packet 513504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 514504937d4SKirshenbaum Erez */ 51533c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 516504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 51733c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 518504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5194a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5204a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5214a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5224a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5234a68ab10SVladimir Kondratiev */ 5240b853210SMaya Erez else 5250b853210SMaya Erez stats->rx_csum_err++; 526504937d4SKirshenbaum Erez } 527504937d4SKirshenbaum Erez 528c406ea7cSVladimir Kondratiev if (snaplen) { 529c406ea7cSVladimir Kondratiev /* Packet layout 530c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 531c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 532c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 533c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 534c406ea7cSVladimir Kondratiev */ 535c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 536c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 537c406ea7cSVladimir Kondratiev } 538c406ea7cSVladimir Kondratiev 5392be7d22fSVladimir Kondratiev return skb; 5402be7d22fSVladimir Kondratiev } 5412be7d22fSVladimir Kondratiev 5422be7d22fSVladimir Kondratiev /** 5432be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5442be7d22fSVladimir Kondratiev * buffers posted at @swtail 5455bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 5465bd60982SLior David * allocate skbs with headroom according to main interface only. This 5475bd60982SLior David * means it will not work with monitor interface together with other VIFs. 5485bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 5495bd60982SLior David * and we will need to fix this code once we add support. 5502be7d22fSVladimir Kondratiev */ 5512be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5522be7d22fSVladimir Kondratiev { 553e00243faSLior David struct net_device *ndev = wil->main_ndev; 55410590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 5552be7d22fSVladimir Kondratiev u32 next_tail; 5562be7d22fSVladimir Kondratiev int rc = 0; 5572be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5582be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5592be7d22fSVladimir Kondratiev 56010590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 5612be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5622be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5632be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 56433c477fdSVladimir Kondratiev if (unlikely(rc)) { 5653d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 5662be7d22fSVladimir Kondratiev rc, v->swtail); 5672be7d22fSVladimir Kondratiev break; 5682be7d22fSVladimir Kondratiev } 5692be7d22fSVladimir Kondratiev } 570ab6d7cc3SMaya Erez 571ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 572ab6d7cc3SMaya Erez * committing them to HW 573ab6d7cc3SMaya Erez */ 574ab6d7cc3SMaya Erez wmb(); 575ab6d7cc3SMaya Erez 576b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5772be7d22fSVladimir Kondratiev 5782be7d22fSVladimir Kondratiev return rc; 5792be7d22fSVladimir Kondratiev } 5802be7d22fSVladimir Kondratiev 58158527421SVladimir Kondratiev /** 58258527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 58358527421SVladimir Kondratiev * @cs: One area of memory 58458527421SVladimir Kondratiev * @ct: Another area of memory 58558527421SVladimir Kondratiev * @count: The size of the area. 58658527421SVladimir Kondratiev * 58758527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 58858527421SVladimir Kondratiev * with minimal modifications 58958527421SVladimir Kondratiev */ 5907be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 59158527421SVladimir Kondratiev { 59258527421SVladimir Kondratiev const unsigned char *su1, *su2; 59358527421SVladimir Kondratiev int res = 0; 59458527421SVladimir Kondratiev 59558527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 59658527421SVladimir Kondratiev --su1, --su2, count--) { 59758527421SVladimir Kondratiev res = *su1 - *su2; 59858527421SVladimir Kondratiev if (res) 59958527421SVladimir Kondratiev break; 60058527421SVladimir Kondratiev } 60158527421SVladimir Kondratiev return res; 60258527421SVladimir Kondratiev } 60358527421SVladimir Kondratiev 60458527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 60558527421SVladimir Kondratiev { 60658527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 60758527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 60858527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 60958527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 61058527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 61158527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 61258527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 61358527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 61458527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 61558527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 61658527421SVladimir Kondratiev 61758527421SVladimir Kondratiev if (!cc->key_set) { 61858527421SVladimir Kondratiev wil_err_ratelimited(wil, 61958527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 62058527421SVladimir Kondratiev cid, tid, mc, key_id); 62158527421SVladimir Kondratiev return -EINVAL; 62258527421SVladimir Kondratiev } 62358527421SVladimir Kondratiev 62458527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 62558527421SVladimir Kondratiev wil_err_ratelimited(wil, 62658527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 62758527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 62858527421SVladimir Kondratiev return -EINVAL; 62958527421SVladimir Kondratiev } 63058527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 63158527421SVladimir Kondratiev 63258527421SVladimir Kondratiev return 0; 63358527421SVladimir Kondratiev } 63458527421SVladimir Kondratiev 635e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 636e15af41cSDedy Lansky struct wil_net_stats *stats) 637e15af41cSDedy Lansky { 638e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 639e15af41cSDedy Lansky 640e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 641e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 642e15af41cSDedy Lansky stats->rx_mic_error++; 643e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 644e15af41cSDedy Lansky return -EFAULT; 645e15af41cSDedy Lansky } 646e15af41cSDedy Lansky 647e15af41cSDedy Lansky return 0; 648e15af41cSDedy Lansky } 649e15af41cSDedy Lansky 6507be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 6517be13fc3SGidon Studinski int *security) 6527be13fc3SGidon Studinski { 6537be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 6547be13fc3SGidon Studinski 6557be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 6567be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 6577be13fc3SGidon Studinski } 6587be13fc3SGidon Studinski 6592be7d22fSVladimir Kondratiev /* 6602be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 661e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6622be7d22fSVladimir Kondratiev */ 663b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6642be7d22fSVladimir Kondratiev { 665c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 666e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 667c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 668e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 6692be7d22fSVladimir Kondratiev unsigned int len = skb->len; 6707be13fc3SGidon Studinski int cid; 6717be13fc3SGidon Studinski int security; 672c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 673c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 674c42da999SVladimir Kondratiev * is not suitable, need to look at data 675c42da999SVladimir Kondratiev */ 676c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 6777be13fc3SGidon Studinski struct wil_net_stats *stats; 678c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 679c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 680c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 681c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 682c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 683c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 684c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 685c42da999SVladimir Kondratiev }; 6862be7d22fSVladimir Kondratiev 6877be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 6887be13fc3SGidon Studinski 6897be13fc3SGidon Studinski stats = &wil->sta[cid].stats; 6907be13fc3SGidon Studinski 691241804cbSVladimir Kondratiev skb_orphan(skb); 692241804cbSVladimir Kondratiev 6937be13fc3SGidon Studinski if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 69458527421SVladimir Kondratiev rc = GRO_DROP; 69558527421SVladimir Kondratiev dev_kfree_skb(skb); 69658527421SVladimir Kondratiev stats->rx_replay++; 69758527421SVladimir Kondratiev goto stats; 69858527421SVladimir Kondratiev } 69958527421SVladimir Kondratiev 700e15af41cSDedy Lansky /* check errors reported by HW and update statistics */ 701e15af41cSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 702e15af41cSDedy Lansky dev_kfree_skb(skb); 703e15af41cSDedy Lansky return; 704e15af41cSDedy Lansky } 705e15af41cSDedy Lansky 7069a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 7079a65064aSDedy Lansky if (mcast && ether_addr_equal(eth->h_source, ndev->dev_addr)) { 7089a65064aSDedy Lansky /* mcast packet looped back to us */ 7099a65064aSDedy Lansky rc = GRO_DROP; 7109a65064aSDedy Lansky dev_kfree_skb(skb); 7119a65064aSDedy Lansky goto stats; 7129a65064aSDedy Lansky } 7139a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 714c42da999SVladimir Kondratiev if (mcast) { 715c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 716c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 717c42da999SVladimir Kondratiev */ 718c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 719c42da999SVladimir Kondratiev } else { 720e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 721e00243faSLior David eth->h_dest); 7222be7d22fSVladimir Kondratiev 723c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 724c42da999SVladimir Kondratiev /* The destination station is associated to 725c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 726c42da999SVladimir Kondratiev * directly to it and do not pass it to local 727c42da999SVladimir Kondratiev * net stack. 728c42da999SVladimir Kondratiev */ 729c42da999SVladimir Kondratiev xmit_skb = skb; 730c42da999SVladimir Kondratiev skb = NULL; 731c42da999SVladimir Kondratiev } 732c42da999SVladimir Kondratiev } 733c42da999SVladimir Kondratiev } 734c42da999SVladimir Kondratiev if (xmit_skb) { 735c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 736c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 737c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 738c42da999SVladimir Kondratiev */ 739c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 740c42da999SVladimir Kondratiev xmit_skb->priority += 256; 741c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 742c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 743c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 744c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 745c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 746c42da999SVladimir Kondratiev } 747c42da999SVladimir Kondratiev 748c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 749c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 7505bd60982SLior David skb->dev = ndev; 751c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 752c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 753c42da999SVladimir Kondratiev len, gro_res_str[rc]); 754c42da999SVladimir Kondratiev } 75558527421SVladimir Kondratiev stats: 756c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 757b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 758b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 759b5998e6aSVladimir Kondratiev stats->rx_dropped++; 760b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 761b5998e6aSVladimir Kondratiev } else { 7622be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 763c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7642be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 765c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 766c42da999SVladimir Kondratiev if (mcast) 767c42da999SVladimir Kondratiev ndev->stats.multicast++; 768194b482bSVladimir Kondratiev } 7692be7d22fSVladimir Kondratiev } 7702be7d22fSVladimir Kondratiev 7712be7d22fSVladimir Kondratiev /** 7722be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7732be7d22fSVladimir Kondratiev * 774e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7752be7d22fSVladimir Kondratiev */ 776e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7772be7d22fSVladimir Kondratiev { 778e00243faSLior David struct net_device *ndev = wil->main_ndev; 779e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 78010590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 7812be7d22fSVladimir Kondratiev struct sk_buff *skb; 7822be7d22fSVladimir Kondratiev 78333c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7842be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7852be7d22fSVladimir Kondratiev return; 7862be7d22fSVladimir Kondratiev } 787af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 788e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 789e0287c4aSVladimir Kondratiev (*quota)--; 7902be7d22fSVladimir Kondratiev 791e00243faSLior David /* monitor is currently supported on main interface only */ 792e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 7932be7d22fSVladimir Kondratiev skb->dev = ndev; 7942be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7952be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7962be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7972be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 798b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7992be7d22fSVladimir Kondratiev } else { 800b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8012be7d22fSVladimir Kondratiev } 8022be7d22fSVladimir Kondratiev } 8032be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8042be7d22fSVladimir Kondratiev } 8052be7d22fSVladimir Kondratiev 80652a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 80752a45702SLior David { 80852a45702SLior David wil->rx_buf_len = rx_large_buf ? 80952a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 81052a45702SLior David if (mtu_max > wil->rx_buf_len) { 81152a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 81252a45702SLior David * backward compatibility (mtu_max parameter was also used 81352a45702SLior David * to support receiving large packets) 81452a45702SLior David */ 81552a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 81652a45702SLior David wil->rx_buf_len = mtu_max; 81752a45702SLior David } 81852a45702SLior David } 81952a45702SLior David 82061e5ec04SDedy Lansky static int wil_rx_init(struct wil6210_priv *wil, uint order) 8212be7d22fSVladimir Kondratiev { 82210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8232be7d22fSVladimir Kondratiev int rc; 8242be7d22fSVladimir Kondratiev 825af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8269cf10d62SVladimir Kondratiev 8278bf6adb9SVladimir Kondratiev if (vring->va) { 8288bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8298bf6adb9SVladimir Kondratiev return -EINVAL; 8308bf6adb9SVladimir Kondratiev } 8318bf6adb9SVladimir Kondratiev 83252a45702SLior David wil_rx_buf_len_init(wil); 83352a45702SLior David 83461e5ec04SDedy Lansky vring->size = 1 << order; 83596c93589SGidon Studinski vring->is_rx = true; 8362be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8372be7d22fSVladimir Kondratiev if (rc) 8382be7d22fSVladimir Kondratiev return rc; 8392be7d22fSVladimir Kondratiev 84047e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8412be7d22fSVladimir Kondratiev if (rc) 8422be7d22fSVladimir Kondratiev goto err_free; 8432be7d22fSVladimir Kondratiev 8442be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8452be7d22fSVladimir Kondratiev if (rc) 8462be7d22fSVladimir Kondratiev goto err_free; 8472be7d22fSVladimir Kondratiev 8482be7d22fSVladimir Kondratiev return 0; 8492be7d22fSVladimir Kondratiev err_free: 85096c93589SGidon Studinski wil_vring_free(wil, vring); 8512be7d22fSVladimir Kondratiev 8522be7d22fSVladimir Kondratiev return rc; 8532be7d22fSVladimir Kondratiev } 8542be7d22fSVladimir Kondratiev 85596c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 8562be7d22fSVladimir Kondratiev { 85710590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8582be7d22fSVladimir Kondratiev 859af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8609cf10d62SVladimir Kondratiev 8612acb4220SVladimir Kondratiev if (vring->va) 86296c93589SGidon Studinski wil_vring_free(wil, vring); 8632be7d22fSVladimir Kondratiev } 8642be7d22fSVladimir Kondratiev 8659202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 8669202d7b6SMaya Erez u32 len, int vring_index) 8679202d7b6SMaya Erez { 8689202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 8699202d7b6SMaya Erez 8709202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 8719202d7b6SMaya Erez d->dma.ip_length = 0; 8729202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 8739202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 8749202d7b6SMaya Erez d->dma.error = 0; 8759202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 8769202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 8779202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 8789202d7b6SMaya Erez d->mac.d[0] = 0; 8799202d7b6SMaya Erez d->mac.d[1] = 0; 8809202d7b6SMaya Erez d->mac.d[2] = 0; 8819202d7b6SMaya Erez d->mac.ucode_cmd = 0; 8829202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 8839202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 8849202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 8859202d7b6SMaya Erez 8869202d7b6SMaya Erez return 0; 8879202d7b6SMaya Erez } 8889202d7b6SMaya Erez 88996c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 890875e9439SMaya Erez { 891875e9439SMaya Erez spin_lock_bh(&txdata->lock); 892875e9439SMaya Erez txdata->dot1x_open = 0; 893875e9439SMaya Erez txdata->enabled = 0; 894875e9439SMaya Erez txdata->idle = 0; 895875e9439SMaya Erez txdata->last_idle = 0; 896875e9439SMaya Erez txdata->begin = 0; 897875e9439SMaya Erez txdata->agg_wsize = 0; 898875e9439SMaya Erez txdata->agg_timeout = 0; 899875e9439SMaya Erez txdata->agg_amsdu = 0; 900875e9439SMaya Erez txdata->addba_in_progress = false; 901e00243faSLior David txdata->mid = U8_MAX; 902875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 903875e9439SMaya Erez } 904875e9439SMaya Erez 90596c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9062be7d22fSVladimir Kondratiev int cid, int tid) 9072be7d22fSVladimir Kondratiev { 908e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9092be7d22fSVladimir Kondratiev int rc; 9102be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9112be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9122be7d22fSVladimir Kondratiev .vring_cfg = { 9132be7d22fSVladimir Kondratiev .tx_sw_ring = { 9149a06bec9SVladimir Kondratiev .max_mpdu_size = 915c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 916b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9172be7d22fSVladimir Kondratiev }, 9182be7d22fSVladimir Kondratiev .ringid = id, 919a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9202be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9212be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9222be7d22fSVladimir Kondratiev .to_resolution = 0, 9233277213fSVladimir Kondratiev .agg_max_wsize = 0, 9242be7d22fSVladimir Kondratiev .schd_params = { 9252be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9262be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9272be7d22fSVladimir Kondratiev }, 9282be7d22fSVladimir Kondratiev }, 9292be7d22fSVladimir Kondratiev }; 9302be7d22fSVladimir Kondratiev struct { 931b874ddecSLior David struct wmi_cmd_hdr wmi; 9322be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 933807b0860SAlexei Avshalom Lazar } __packed reply = { 934807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 935807b0860SAlexei Avshalom Lazar }; 93610590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 93710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 9382be7d22fSVladimir Kondratiev 939af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 940e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9419b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9429cf10d62SVladimir Kondratiev 9432be7d22fSVladimir Kondratiev if (vring->va) { 9442be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9452be7d22fSVladimir Kondratiev rc = -EINVAL; 9462be7d22fSVladimir Kondratiev goto out; 9472be7d22fSVladimir Kondratiev } 9482be7d22fSVladimir Kondratiev 949875e9439SMaya Erez wil_tx_data_init(txdata); 95096c93589SGidon Studinski vring->is_rx = false; 9512be7d22fSVladimir Kondratiev vring->size = size; 9522be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9532be7d22fSVladimir Kondratiev if (rc) 9542be7d22fSVladimir Kondratiev goto out; 9552be7d22fSVladimir Kondratiev 95610590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 95710590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 95893ae6d49SVladimir Kondratiev 9592be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9602be7d22fSVladimir Kondratiev 961e00243faSLior David if (!vif->privacy) 962230d8442SVladimir Kondratiev txdata->dot1x_open = true; 963e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9642be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9652be7d22fSVladimir Kondratiev if (rc) 9662be7d22fSVladimir Kondratiev goto out_free; 9672be7d22fSVladimir Kondratiev 968b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9692be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9702be7d22fSVladimir Kondratiev reply.cmd.status); 971c331997bSVladimir Kondratiev rc = -EINVAL; 9722be7d22fSVladimir Kondratiev goto out_free; 9732be7d22fSVladimir Kondratiev } 9742be7d22fSVladimir Kondratiev 975dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 976dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 977e00243faSLior David txdata->mid = vif->mid; 978097638a0SVladimir Kondratiev txdata->enabled = 1; 979dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 980dc90506fSMaya Erez 981230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9823a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 983097638a0SVladimir Kondratiev 9842be7d22fSVladimir Kondratiev return 0; 9852be7d22fSVladimir Kondratiev out_free: 986875e9439SMaya Erez spin_lock_bh(&txdata->lock); 987230d8442SVladimir Kondratiev txdata->dot1x_open = false; 988230d8442SVladimir Kondratiev txdata->enabled = 0; 989875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 99096c93589SGidon Studinski wil_vring_free(wil, vring); 99110590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 99210590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 9930916d9f2SMaya Erez 9942be7d22fSVladimir Kondratiev out: 9952be7d22fSVladimir Kondratiev 9962be7d22fSVladimir Kondratiev return rc; 9972be7d22fSVladimir Kondratiev } 9982be7d22fSVladimir Kondratiev 999b9010f10SAhmad Masri static int wil_tx_vring_modify(struct wil6210_vif *vif, int ring_id, int cid, 1000b9010f10SAhmad Masri int tid) 1001b9010f10SAhmad Masri { 1002b9010f10SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 1003b9010f10SAhmad Masri int rc; 1004b9010f10SAhmad Masri struct wmi_vring_cfg_cmd cmd = { 1005b9010f10SAhmad Masri .action = cpu_to_le32(WMI_VRING_CMD_MODIFY), 1006b9010f10SAhmad Masri .vring_cfg = { 1007b9010f10SAhmad Masri .tx_sw_ring = { 1008b9010f10SAhmad Masri .max_mpdu_size = 1009b9010f10SAhmad Masri cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1010b9010f10SAhmad Masri .ring_size = 0, 1011b9010f10SAhmad Masri }, 1012b9010f10SAhmad Masri .ringid = ring_id, 1013b9010f10SAhmad Masri .cidxtid = mk_cidxtid(cid, tid), 1014b9010f10SAhmad Masri .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 1015b9010f10SAhmad Masri .mac_ctrl = 0, 1016b9010f10SAhmad Masri .to_resolution = 0, 1017b9010f10SAhmad Masri .agg_max_wsize = 0, 1018b9010f10SAhmad Masri .schd_params = { 1019b9010f10SAhmad Masri .priority = cpu_to_le16(0), 1020b9010f10SAhmad Masri .timeslot_us = cpu_to_le16(0xfff), 1021b9010f10SAhmad Masri }, 1022b9010f10SAhmad Masri }, 1023b9010f10SAhmad Masri }; 1024b9010f10SAhmad Masri struct { 1025b9010f10SAhmad Masri struct wmi_cmd_hdr wmi; 1026b9010f10SAhmad Masri struct wmi_vring_cfg_done_event cmd; 1027b9010f10SAhmad Masri } __packed reply = { 1028b9010f10SAhmad Masri .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1029b9010f10SAhmad Masri }; 1030b9010f10SAhmad Masri struct wil_ring *vring = &wil->ring_tx[ring_id]; 1031b9010f10SAhmad Masri struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; 1032b9010f10SAhmad Masri 1033b9010f10SAhmad Masri wil_dbg_misc(wil, "vring_modify: ring %d cid %d tid %d\n", ring_id, 1034b9010f10SAhmad Masri cid, tid); 1035b9010f10SAhmad Masri lockdep_assert_held(&wil->mutex); 1036b9010f10SAhmad Masri 1037b9010f10SAhmad Masri if (!vring->va) { 1038b9010f10SAhmad Masri wil_err(wil, "Tx ring [%d] not allocated\n", ring_id); 1039b9010f10SAhmad Masri return -EINVAL; 1040b9010f10SAhmad Masri } 1041b9010f10SAhmad Masri 1042b9010f10SAhmad Masri if (wil->ring2cid_tid[ring_id][0] != cid || 1043b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] != tid) { 1044b9010f10SAhmad Masri wil_err(wil, "ring info does not match cid=%u tid=%u\n", 1045b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0], 1046b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1]); 1047b9010f10SAhmad Masri } 1048b9010f10SAhmad Masri 1049b9010f10SAhmad Masri cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 1050b9010f10SAhmad Masri 1051b9010f10SAhmad Masri rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 1052b9010f10SAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 1053b9010f10SAhmad Masri if (rc) 1054b9010f10SAhmad Masri goto fail; 1055b9010f10SAhmad Masri 1056b9010f10SAhmad Masri if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 1057b9010f10SAhmad Masri wil_err(wil, "Tx modify failed, status 0x%02x\n", 1058b9010f10SAhmad Masri reply.cmd.status); 1059b9010f10SAhmad Masri rc = -EINVAL; 1060b9010f10SAhmad Masri goto fail; 1061b9010f10SAhmad Masri } 1062b9010f10SAhmad Masri 1063b9010f10SAhmad Masri /* set BA aggregation window size to 0 to force a new BA with the 1064b9010f10SAhmad Masri * new AP 1065b9010f10SAhmad Masri */ 1066b9010f10SAhmad Masri txdata->agg_wsize = 0; 1067b9010f10SAhmad Masri if (txdata->dot1x_open && agg_wsize >= 0) 1068b9010f10SAhmad Masri wil_addba_tx_request(wil, ring_id, agg_wsize); 1069b9010f10SAhmad Masri 1070b9010f10SAhmad Masri return 0; 1071b9010f10SAhmad Masri fail: 1072b9010f10SAhmad Masri spin_lock_bh(&txdata->lock); 1073b9010f10SAhmad Masri txdata->dot1x_open = false; 1074b9010f10SAhmad Masri txdata->enabled = 0; 1075b9010f10SAhmad Masri spin_unlock_bh(&txdata->lock); 1076b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID; 1077b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] = 0; 1078b9010f10SAhmad Masri return rc; 1079b9010f10SAhmad Masri } 1080b9010f10SAhmad Masri 1081e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 108241d6b093SVladimir Kondratiev { 1083e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 108441d6b093SVladimir Kondratiev int rc; 108541d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 108641d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 108741d6b093SVladimir Kondratiev .vring_cfg = { 108841d6b093SVladimir Kondratiev .tx_sw_ring = { 108941d6b093SVladimir Kondratiev .max_mpdu_size = 109041d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 109141d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 109241d6b093SVladimir Kondratiev }, 109341d6b093SVladimir Kondratiev .ringid = id, 109441d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 109541d6b093SVladimir Kondratiev }, 109641d6b093SVladimir Kondratiev }; 109741d6b093SVladimir Kondratiev struct { 1098b874ddecSLior David struct wmi_cmd_hdr wmi; 109941d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1100807b0860SAlexei Avshalom Lazar } __packed reply = { 1101807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1102807b0860SAlexei Avshalom Lazar }; 110310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 110410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 110541d6b093SVladimir Kondratiev 1106af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 110741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 11089b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 110941d6b093SVladimir Kondratiev 111041d6b093SVladimir Kondratiev if (vring->va) { 111141d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 111241d6b093SVladimir Kondratiev rc = -EINVAL; 111341d6b093SVladimir Kondratiev goto out; 111441d6b093SVladimir Kondratiev } 111541d6b093SVladimir Kondratiev 1116875e9439SMaya Erez wil_tx_data_init(txdata); 111796c93589SGidon Studinski vring->is_rx = false; 111841d6b093SVladimir Kondratiev vring->size = size; 111941d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 112041d6b093SVladimir Kondratiev if (rc) 112141d6b093SVladimir Kondratiev goto out; 112241d6b093SVladimir Kondratiev 112310590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 112410590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 112541d6b093SVladimir Kondratiev 112641d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 112741d6b093SVladimir Kondratiev 1128e00243faSLior David if (!vif->privacy) 1129230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1130e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1131e00243faSLior David &cmd, sizeof(cmd), 113241d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 113341d6b093SVladimir Kondratiev if (rc) 113441d6b093SVladimir Kondratiev goto out_free; 113541d6b093SVladimir Kondratiev 113641d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 113741d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 113841d6b093SVladimir Kondratiev reply.cmd.status); 113941d6b093SVladimir Kondratiev rc = -EINVAL; 114041d6b093SVladimir Kondratiev goto out_free; 114141d6b093SVladimir Kondratiev } 114241d6b093SVladimir Kondratiev 1143dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1144dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1145e00243faSLior David txdata->mid = vif->mid; 114641d6b093SVladimir Kondratiev txdata->enabled = 1; 1147dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 114841d6b093SVladimir Kondratiev 114941d6b093SVladimir Kondratiev return 0; 115041d6b093SVladimir Kondratiev out_free: 1151875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1152230d8442SVladimir Kondratiev txdata->enabled = 0; 1153230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1154875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 115596c93589SGidon Studinski wil_vring_free(wil, vring); 115641d6b093SVladimir Kondratiev out: 115741d6b093SVladimir Kondratiev 115841d6b093SVladimir Kondratiev return rc; 115941d6b093SVladimir Kondratiev } 116041d6b093SVladimir Kondratiev 116110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1162e00243faSLior David struct wil6210_vif *vif, 11632be7d22fSVladimir Kondratiev struct sk_buff *skb) 11642be7d22fSVladimir Kondratiev { 11653df2cd36SVladimir Kondratiev int i; 11663df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1167e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 116896c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 11692be7d22fSVladimir Kondratiev 11703df2cd36SVladimir Kondratiev if (cid < 0) 11713df2cd36SVladimir Kondratiev return NULL; 11723df2cd36SVladimir Kondratiev 11733df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 117496c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 117510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 117610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1177230d8442SVladimir Kondratiev continue; 117810590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 117910590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 118010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11818fe59627SVladimir Kondratiev 1182af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1183af3db60aSLazar Alexei eth->h_dest, i); 1184b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11852be7d22fSVladimir Kondratiev return v; 11863df2cd36SVladimir Kondratiev } else { 1187af3db60aSLazar Alexei wil_dbg_txrx(wil, 1188af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1189af3db60aSLazar Alexei i); 11903df2cd36SVladimir Kondratiev return NULL; 11913df2cd36SVladimir Kondratiev } 11923df2cd36SVladimir Kondratiev } 11933df2cd36SVladimir Kondratiev } 11942be7d22fSVladimir Kondratiev 11952be7d22fSVladimir Kondratiev return NULL; 11962be7d22fSVladimir Kondratiev } 11972be7d22fSVladimir Kondratiev 11989202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 11999202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 120054ed90a8SVladimir Kondratiev 120110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1202e00243faSLior David struct wil6210_vif *vif, 120354ed90a8SVladimir Kondratiev struct sk_buff *skb) 120454ed90a8SVladimir Kondratiev { 120510590c6aSGidon Studinski struct wil_ring *ring; 120654ed90a8SVladimir Kondratiev int i; 120754ed90a8SVladimir Kondratiev u8 cid; 120810590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 120996c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 121054ed90a8SVladimir Kondratiev 121154ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 121254ed90a8SVladimir Kondratiev * for the AP we connected to. 1213230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 121454ed90a8SVladimir Kondratiev */ 121596c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 121610590c6aSGidon Studinski ring = &wil->ring_tx[i]; 121710590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 121810590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 121954ed90a8SVladimir Kondratiev continue; 122054ed90a8SVladimir Kondratiev 122110590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 122241d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 122341d6b093SVladimir Kondratiev continue; 122441d6b093SVladimir Kondratiev 122510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 122610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1227230d8442SVladimir Kondratiev continue; 122854ed90a8SVladimir Kondratiev 122954ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 123054ed90a8SVladimir Kondratiev 123110590c6aSGidon Studinski return ring; 123254ed90a8SVladimir Kondratiev } 123354ed90a8SVladimir Kondratiev 123410590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 123554ed90a8SVladimir Kondratiev 123654ed90a8SVladimir Kondratiev return NULL; 123754ed90a8SVladimir Kondratiev } 123854ed90a8SVladimir Kondratiev 123970812421SVladimir Kondratiev /* Use one of 2 strategies: 124070812421SVladimir Kondratiev * 124170812421SVladimir Kondratiev * 1. New (real broadcast): 124270812421SVladimir Kondratiev * use dedicated broadcast vring 124370812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 124470812421SVladimir Kondratiev * Find 1-st vring and return it; 124570812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 124670812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 124770812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 124870812421SVladimir Kondratiev * - for PBSS 124970812421SVladimir Kondratiev */ 125010590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1251e00243faSLior David struct wil6210_vif *vif, 1252fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1253fb3cac57SVladimir Kondratiev { 125410590c6aSGidon Studinski struct wil_ring *v; 125510590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 125610590c6aSGidon Studinski int i = vif->bcast_ring; 1257fb3cac57SVladimir Kondratiev 125841d6b093SVladimir Kondratiev if (i < 0) 125941d6b093SVladimir Kondratiev return NULL; 126010590c6aSGidon Studinski v = &wil->ring_tx[i]; 126110590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1262b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1263fb3cac57SVladimir Kondratiev return NULL; 126410590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 126510590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1266230d8442SVladimir Kondratiev return NULL; 1267fb3cac57SVladimir Kondratiev 1268fb3cac57SVladimir Kondratiev return v; 1269fb3cac57SVladimir Kondratiev } 1270fb3cac57SVladimir Kondratiev 127170812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 127270812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 127370812421SVladimir Kondratiev { 127470812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 127510590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 127670812421SVladimir Kondratiev 127770812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 127870812421SVladimir Kondratiev } 127970812421SVladimir Kondratiev 128010590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1281e00243faSLior David struct wil6210_vif *vif, 128270812421SVladimir Kondratiev struct sk_buff *skb) 128370812421SVladimir Kondratiev { 128410590c6aSGidon Studinski struct wil_ring *v, *v2; 128570812421SVladimir Kondratiev struct sk_buff *skb2; 128670812421SVladimir Kondratiev int i; 128770812421SVladimir Kondratiev u8 cid; 128870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 128970812421SVladimir Kondratiev char *src = eth->h_source; 129010590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 129196c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 129270812421SVladimir Kondratiev 129370812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 129496c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 129510590c6aSGidon Studinski v = &wil->ring_tx[i]; 129610590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1297e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 129870812421SVladimir Kondratiev continue; 129970812421SVladimir Kondratiev 130010590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 130170812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 130270812421SVladimir Kondratiev continue; 130310590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 130410590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 130570812421SVladimir Kondratiev continue; 130670812421SVladimir Kondratiev 130770812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 130870812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 130970812421SVladimir Kondratiev continue; 131070812421SVladimir Kondratiev 131170812421SVladimir Kondratiev goto found; 131270812421SVladimir Kondratiev } 131370812421SVladimir Kondratiev 131470812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 131570812421SVladimir Kondratiev 131670812421SVladimir Kondratiev return NULL; 131770812421SVladimir Kondratiev 131870812421SVladimir Kondratiev found: 131970812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 132070812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 132170812421SVladimir Kondratiev 132270812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 132370812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 132410590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 132510590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1326e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 132770812421SVladimir Kondratiev continue; 132810590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 132970812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 133070812421SVladimir Kondratiev continue; 133110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 133210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 133370812421SVladimir Kondratiev continue; 133470812421SVladimir Kondratiev 133570812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 133670812421SVladimir Kondratiev continue; 133770812421SVladimir Kondratiev 133870812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 133970812421SVladimir Kondratiev if (skb2) { 134070812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 134170812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 13429202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 134366449740SLior David /* successful call to wil_tx_ring takes skb2 ref */ 134466449740SLior David dev_kfree_skb_any(skb2); 134570812421SVladimir Kondratiev } else { 134670812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 134770812421SVladimir Kondratiev } 134870812421SVladimir Kondratiev } 134970812421SVladimir Kondratiev 135070812421SVladimir Kondratiev return v; 135170812421SVladimir Kondratiev } 135270812421SVladimir Kondratiev 1353c236658fSVladimir Kondratiev static inline 1354c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1355c236658fSVladimir Kondratiev { 13563d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1357c236658fSVladimir Kondratiev } 1358c236658fSVladimir Kondratiev 13593d4bde15SVladimir Kondratiev /** 13603d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13613d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13623d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13633d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13643d4bde15SVladimir Kondratiev */ 13653d4bde15SVladimir Kondratiev 13663d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13673d4bde15SVladimir Kondratiev struct sk_buff *skb, 13683d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13693d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1370504937d4SKirshenbaum Erez { 13713d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13723d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13733d4bde15SVladimir Kondratiev 13743d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13753d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13763d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13773d4bde15SVladimir Kondratiev 13783d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13793d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13803d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13813d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13823d4bde15SVladimir Kondratiev 13833d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13843d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13853d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13863d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13873d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13883d4bde15SVladimir Kondratiev } 13893d4bde15SVladimir Kondratiev 13903d4bde15SVladimir Kondratiev /** 13913d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13923d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13933d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13943d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13953d4bde15SVladimir Kondratiev * 13963d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13973d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13983d4bde15SVladimir Kondratiev */ 13993d4bde15SVladimir Kondratiev 14003d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 14013d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1402504937d4SKirshenbaum Erez int protocol; 1403504937d4SKirshenbaum Erez 1404504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1405504937d4SKirshenbaum Erez return 0; 1406504937d4SKirshenbaum Erez 1407df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1408df2d08eeSVladimir Kondratiev 1409504937d4SKirshenbaum Erez switch (skb->protocol) { 1410504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1411504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1412df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1413504937d4SKirshenbaum Erez break; 1414504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1415504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1416504937d4SKirshenbaum Erez break; 1417504937d4SKirshenbaum Erez default: 1418504937d4SKirshenbaum Erez return -EINVAL; 1419504937d4SKirshenbaum Erez } 1420504937d4SKirshenbaum Erez 1421504937d4SKirshenbaum Erez switch (protocol) { 1422504937d4SKirshenbaum Erez case IPPROTO_TCP: 1423504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1424504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1425504937d4SKirshenbaum Erez d->dma.d0 |= 1426504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1427504937d4SKirshenbaum Erez break; 1428504937d4SKirshenbaum Erez case IPPROTO_UDP: 1429504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1430504937d4SKirshenbaum Erez d->dma.d0 |= 1431504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1432504937d4SKirshenbaum Erez break; 1433504937d4SKirshenbaum Erez default: 1434504937d4SKirshenbaum Erez return -EINVAL; 1435504937d4SKirshenbaum Erez } 1436504937d4SKirshenbaum Erez 1437504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1438504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1439504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1440504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1441504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1442504937d4SKirshenbaum Erez 1443504937d4SKirshenbaum Erez return 0; 1444504937d4SKirshenbaum Erez } 1445504937d4SKirshenbaum Erez 14463d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14473d4bde15SVladimir Kondratiev { 14483d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14493d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14503d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14513d4bde15SVladimir Kondratiev } 14523d4bde15SVladimir Kondratiev 14533d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14543d4bde15SVladimir Kondratiev { 14553d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14563d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14573d4bde15SVladimir Kondratiev } 14583d4bde15SVladimir Kondratiev 1459e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 146010590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 14613d4bde15SVladimir Kondratiev { 14623d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14633d4bde15SVladimir Kondratiev 14643d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14653d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14663d4bde15SVladimir Kondratiev *_first_desc = NULL; 14673d4bde15SVladimir Kondratiev 14683d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14693d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14703d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14713d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14723d4bde15SVladimir Kondratiev 14733d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14743d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14753d4bde15SVladimir Kondratiev 14763d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14773d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14783d4bde15SVladimir Kondratiev 14793d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 148010590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14813d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14823d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14833d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14843d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 148510590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 148610590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14873d4bde15SVladimir Kondratiev uint i = swhead; 14883d4bde15SVladimir Kondratiev dma_addr_t pa; 14893d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14903d4bde15SVladimir Kondratiev int rem_data = mss; 14913d4bde15SVladimir Kondratiev int lenmss; 14923d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14933d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14943d4bde15SVladimir Kondratiev bool is_ipv4; 14953d4bde15SVladimir Kondratiev int tcp_hdr_len; 14963d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14973d4bde15SVladimir Kondratiev int gso_type; 1498e3d2ed94SHamad Kadmany int rc = -EINVAL; 14993d4bde15SVladimir Kondratiev 1500af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1501af3db60aSLazar Alexei vring_index); 15023d4bde15SVladimir Kondratiev 15033d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 15043d4bde15SVladimir Kondratiev return -EINVAL; 15053d4bde15SVladimir Kondratiev 15063d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 15073d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 15083d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 15093d4bde15SVladimir Kondratiev * this is the initial check only. 15103d4bde15SVladimir Kondratiev */ 15113d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 15123d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 15133d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 15143d4bde15SVladimir Kondratiev vring_index, min_desc_required); 15153d4bde15SVladimir Kondratiev return -ENOMEM; 15163d4bde15SVladimir Kondratiev } 15173d4bde15SVladimir Kondratiev 15183d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 15193d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 15203d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 15213d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 15223d4bde15SVladimir Kondratiev 15233d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 15243d4bde15SVladimir Kondratiev switch (gso_type) { 15253d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 15263d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 15273d4bde15SVladimir Kondratiev * as required by the offloading doc 15283d4bde15SVladimir Kondratiev */ 15293d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 15303d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 15313d4bde15SVladimir Kondratiev is_ipv4 = true; 15323d4bde15SVladimir Kondratiev break; 15333d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 15343d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15353d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15363d4bde15SVladimir Kondratiev is_ipv4 = false; 15373d4bde15SVladimir Kondratiev break; 15383d4bde15SVladimir Kondratiev default: 15393d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15403d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15413d4bde15SVladimir Kondratiev */ 15423d4bde15SVladimir Kondratiev return -EINVAL; 15433d4bde15SVladimir Kondratiev } 15443d4bde15SVladimir Kondratiev 15453d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15463d4bde15SVladimir Kondratiev return -EINVAL; 15473d4bde15SVladimir Kondratiev 15483d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15493d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15503d4bde15SVladimir Kondratiev */ 15513d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15523d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15533d4bde15SVladimir Kondratiev 155410590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 15553d4bde15SVladimir Kondratiev 15563d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15573d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15583d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15593d4bde15SVladimir Kondratiev goto err_exit; 15603d4bde15SVladimir Kondratiev } 15613d4bde15SVladimir Kondratiev 15629202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 15639202d7b6SMaya Erez hdrlen, vring_index); 15643d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15653d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15663d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15673d4bde15SVladimir Kondratiev 15683d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15693d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15703d4bde15SVladimir Kondratiev 15713d4bde15SVladimir Kondratiev descs_used++; 15723d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15733d4bde15SVladimir Kondratiev 15743d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15753d4bde15SVladimir Kondratiev if (headlen) { 15763d4bde15SVladimir Kondratiev len = headlen; 15773d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15783d4bde15SVladimir Kondratiev len); 15793d4bde15SVladimir Kondratiev } else { 15803d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15813d4bde15SVladimir Kondratiev len = frag->size; 15823d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15833d4bde15SVladimir Kondratiev } 15843d4bde15SVladimir Kondratiev 15853d4bde15SVladimir Kondratiev while (len) { 15863d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15873d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15883d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15893d4bde15SVladimir Kondratiev 15903d4bde15SVladimir Kondratiev if (descs_used == avail) { 1591e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1592e3d2ed94SHamad Kadmany rc = -ENOMEM; 1593e3d2ed94SHamad Kadmany goto mem_error; 15943d4bde15SVladimir Kondratiev } 15953d4bde15SVladimir Kondratiev 15963d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15973d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15983d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15993d4bde15SVladimir Kondratiev 16003d4bde15SVladimir Kondratiev if (!headlen) { 16013d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 16023d4bde15SVladimir Kondratiev frag->size - len, lenmss, 16033d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 16043d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 16053d4bde15SVladimir Kondratiev } else { 16063d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 16073d4bde15SVladimir Kondratiev skb->data + 16083d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 16093d4bde15SVladimir Kondratiev lenmss, 16103d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 16113d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16123d4bde15SVladimir Kondratiev headlen -= lenmss; 16133d4bde15SVladimir Kondratiev } 16143d4bde15SVladimir Kondratiev 1615e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1616e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1617e3d2ed94SHamad Kadmany goto mem_error; 1618e3d2ed94SHamad Kadmany } 16193d4bde15SVladimir Kondratiev 162010590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 16213d4bde15SVladimir Kondratiev 16223d4bde15SVladimir Kondratiev if (!_first_desc) { 16233d4bde15SVladimir Kondratiev _first_desc = _desc; 16243d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 16253d4bde15SVladimir Kondratiev d = first_desc; 16263d4bde15SVladimir Kondratiev } else { 16273d4bde15SVladimir Kondratiev d = &desc_mem; 16283d4bde15SVladimir Kondratiev } 16293d4bde15SVladimir Kondratiev 16309202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 16319202d7b6SMaya Erez pa, lenmss, vring_index); 16323d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 16333d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 16343d4bde15SVladimir Kondratiev skb_net_hdr_len); 16353d4bde15SVladimir Kondratiev 16363d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16373d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16383d4bde15SVladimir Kondratiev 16393d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16403d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16413d4bde15SVladimir Kondratiev len -= lenmss; 16423d4bde15SVladimir Kondratiev rem_data -= lenmss; 16433d4bde15SVladimir Kondratiev 16443d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16453d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16463d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16473d4bde15SVladimir Kondratiev 16483d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16493d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16503d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16513d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16523d4bde15SVladimir Kondratiev * release 16533d4bde15SVladimir Kondratiev */ 16543d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16553d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16563d4bde15SVladimir Kondratiev sg_desc_cnt + 16573d4bde15SVladimir Kondratiev 1); 16583d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16593d4bde15SVladimir Kondratiev } else { 16603d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16613d4bde15SVladimir Kondratiev sg_desc_cnt); 16623d4bde15SVladimir Kondratiev } 16633d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16643d4bde15SVladimir Kondratiev 16653d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16663d4bde15SVladimir Kondratiev 16673d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16683d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16693d4bde15SVladimir Kondratiev * it twice 16703d4bde15SVladimir Kondratiev */ 16713d4bde15SVladimir Kondratiev if (first_desc != d) 16723d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16733d4bde15SVladimir Kondratiev 16743d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16753d4bde15SVladimir Kondratiev * of this TS processing 16763d4bde15SVladimir Kondratiev */ 16773d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16783d4bde15SVladimir Kondratiev *_desc = *d; 16793d4bde15SVladimir Kondratiev 16803d4bde15SVladimir Kondratiev rem_data = mss; 16813d4bde15SVladimir Kondratiev _first_desc = NULL; 16823d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16833d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16843d4bde15SVladimir Kondratiev *_desc = *d; 16853d4bde15SVladimir Kondratiev } 16863d4bde15SVladimir Kondratiev } 16873d4bde15SVladimir Kondratiev 16883d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16893d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16903d4bde15SVladimir Kondratiev */ 16913d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16923d4bde15SVladimir Kondratiev d = first_desc; 16933d4bde15SVladimir Kondratiev 16943d4bde15SVladimir Kondratiev /* Last data descriptor */ 16953d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16963d4bde15SVladimir Kondratiev *_desc = *d; 16973d4bde15SVladimir Kondratiev 16983d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16993d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 17003d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 17013d4bde15SVladimir Kondratiev 17023d4bde15SVladimir Kondratiev /* hold reference to skb 17033d4bde15SVladimir Kondratiev * to prevent skb release before accounting 17043d4bde15SVladimir Kondratiev * in case of immediate "tx done" 17053d4bde15SVladimir Kondratiev */ 17063d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17073d4bde15SVladimir Kondratiev 17083d4bde15SVladimir Kondratiev /* performance monitoring */ 170910590c6aSGidon Studinski used = wil_ring_used_tx(vring); 171010590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 17113d4bde15SVladimir Kondratiev used, used + descs_used)) { 17123d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17133d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17143d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 17153d4bde15SVladimir Kondratiev } 17163d4bde15SVladimir Kondratiev 1717eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1718eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1719eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1720eb26cff1SMaya Erez * skb before it was completed. 1721eb26cff1SMaya Erez */ 1722eb26cff1SMaya Erez wmb(); 1723eb26cff1SMaya Erez 17243d4bde15SVladimir Kondratiev /* advance swhead */ 172510590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1726e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 17273d4bde15SVladimir Kondratiev 17283d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17293d4bde15SVladimir Kondratiev * committing them to HW 17303d4bde15SVladimir Kondratiev */ 17313d4bde15SVladimir Kondratiev wmb(); 17323d4bde15SVladimir Kondratiev 1733a24a3d6aSDedy Lansky if (wil->tx_latency) 1734a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1735a24a3d6aSDedy Lansky else 1736a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1737a24a3d6aSDedy Lansky 1738b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17393d4bde15SVladimir Kondratiev return 0; 17403d4bde15SVladimir Kondratiev 1741e3d2ed94SHamad Kadmany mem_error: 17423d4bde15SVladimir Kondratiev while (descs_used > 0) { 17433d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17443d4bde15SVladimir Kondratiev 1745a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 174610590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 174710590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 17483d4bde15SVladimir Kondratiev *d = *_desc; 17493d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17503d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17519202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 17523d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17533d4bde15SVladimir Kondratiev descs_used--; 17543d4bde15SVladimir Kondratiev } 17553d4bde15SVladimir Kondratiev err_exit: 1756e3d2ed94SHamad Kadmany return rc; 17573d4bde15SVladimir Kondratiev } 17583d4bde15SVladimir Kondratiev 17599202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 17609202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 17612be7d22fSVladimir Kondratiev { 17622be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 176368ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 176468ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17659202d7b6SMaya Erez u32 swhead = ring->swhead; 17669202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 17672be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1768504937d4SKirshenbaum Erez uint f = 0; 17699202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 17709202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 17712be7d22fSVladimir Kondratiev uint i = swhead; 17722be7d22fSVladimir Kondratiev dma_addr_t pa; 17730436fd9aSVladimir Shulman int used; 17749202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 177541d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17762be7d22fSVladimir Kondratiev 177710590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 17789202d7b6SMaya Erez skb->len, ring_index, nr_frags); 17792be7d22fSVladimir Kondratiev 17805933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17815933a06dSVladimir Kondratiev return -EINVAL; 17825933a06dSVladimir Kondratiev 178333c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 178470801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17855b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17869202d7b6SMaya Erez ring_index, 1 + nr_frags); 17872be7d22fSVladimir Kondratiev return -ENOMEM; 17882be7d22fSVladimir Kondratiev } 17899202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17902be7d22fSVladimir Kondratiev 17918fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17922be7d22fSVladimir Kondratiev 17939202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 17945b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17957743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17962be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17972be7d22fSVladimir Kondratiev 17982be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17992be7d22fSVladimir Kondratiev return -EINVAL; 18009202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 18012be7d22fSVladimir Kondratiev /* 1-st segment */ 18029202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 18039202d7b6SMaya Erez ring_index); 180441d6b093SVladimir Kondratiev if (unlikely(mcast)) { 180541d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1806230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 180741d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 180841d6b093SVladimir Kondratiev } 1809504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 18103d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 18115b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 18129202d7b6SMaya Erez ring_index); 1813504937d4SKirshenbaum Erez goto dma_error; 1814504937d4SKirshenbaum Erez } 1815504937d4SKirshenbaum Erez 18169202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 18173d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 181868ada71eSVladimir Kondratiev 18192be7d22fSVladimir Kondratiev /* middle segments */ 1820504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 18212be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 18222be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 18232be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 18248fe59627SVladimir Kondratiev 1825e59d16c0SVladimir Kondratiev *_d = *d; 18269202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18275b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18285b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18299202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 18309202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 18312be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 18322be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1833e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1834e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 18359202d7b6SMaya Erez ring_index); 18362be7d22fSVladimir Kondratiev goto dma_error; 1837e3d2ed94SHamad Kadmany } 18389202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 18399202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 18409202d7b6SMaya Erez pa, len, ring_index); 1841c236658fSVladimir Kondratiev /* no need to check return code - 1842c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1843c236658fSVladimir Kondratiev * it will succeed here too 1844c236658fSVladimir Kondratiev */ 18453d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18462be7d22fSVladimir Kondratiev } 18472be7d22fSVladimir Kondratiev /* for the last seg only */ 18482be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1849668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18502be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 185168ada71eSVladimir Kondratiev *_d = *d; 18529202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18535b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18545b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18552be7d22fSVladimir Kondratiev 18566cdadd4dSVladimir Kondratiev /* hold reference to skb 18576cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18586cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18596cdadd4dSVladimir Kondratiev */ 18609202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 18616cdadd4dSVladimir Kondratiev 18620436fd9aSVladimir Shulman /* performance monitoring */ 18639202d7b6SMaya Erez used = wil_ring_used_tx(ring); 186410590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 18650436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18667c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18670436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18689202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 18690436fd9aSVladimir Shulman } 18707c0acf86SVladimir Kondratiev 1871eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1872eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1873eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1874eb26cff1SMaya Erez * skb before it was completed. 1875eb26cff1SMaya Erez */ 1876eb26cff1SMaya Erez wmb(); 1877eb26cff1SMaya Erez 18782be7d22fSVladimir Kondratiev /* advance swhead */ 18799202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 18809202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 18819202d7b6SMaya Erez ring->swhead); 18829202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 18833d4bde15SVladimir Kondratiev 18843d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18853d4bde15SVladimir Kondratiev * committing them to HW 18863d4bde15SVladimir Kondratiev */ 18873d4bde15SVladimir Kondratiev wmb(); 18883d4bde15SVladimir Kondratiev 1889a24a3d6aSDedy Lansky if (wil->tx_latency) 1890a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1891a24a3d6aSDedy Lansky else 1892a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1893a24a3d6aSDedy Lansky 18949202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 18952be7d22fSVladimir Kondratiev 18962be7d22fSVladimir Kondratiev return 0; 18972be7d22fSVladimir Kondratiev dma_error: 18982be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1899c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1900c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1901c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 19027e594444SVladimir Kondratiev 19039202d7b6SMaya Erez i = (swhead + f) % ring->size; 19049202d7b6SMaya Erez ctx = &ring->ctx[i]; 19059202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 190668ada71eSVladimir Kondratiev *d = *_d; 190768ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 19089202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 19099202d7b6SMaya Erez (union wil_tx_desc *)d, 19109202d7b6SMaya Erez ctx); 1911f88f113aSVladimir Kondratiev 1912f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 19132be7d22fSVladimir Kondratiev } 19142be7d22fSVladimir Kondratiev 19152be7d22fSVladimir Kondratiev return -EINVAL; 19162be7d22fSVladimir Kondratiev } 19172be7d22fSVladimir Kondratiev 19189202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 19199202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 19205933a06dSVladimir Kondratiev { 19219202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 192210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 19235933a06dSVladimir Kondratiev int rc; 19245933a06dSVladimir Kondratiev 19255933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 19263d4bde15SVladimir Kondratiev 1927fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1928fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1929fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1930fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1931fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1932fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1933fe9ee51eSMaya Erez return -EINVAL; 1934fe9ee51eSMaya Erez } 1935fe9ee51eSMaya Erez 19369202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 19379202d7b6SMaya Erez (wil, vif, ring, skb); 19383d4bde15SVladimir Kondratiev 19395933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 19403d4bde15SVladimir Kondratiev 19415933a06dSVladimir Kondratiev return rc; 19425933a06dSVladimir Kondratiev } 19435933a06dSVladimir Kondratiev 1944f9e3033fSDedy Lansky /** 1945f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 19465bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1947f9e3033fSDedy Lansky * 1948f9e3033fSDedy Lansky * This function does one of two checks: 1949f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1950f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1951f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1952f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1953f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1954f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1955f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1956f9e3033fSDedy Lansky * 1957f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1958f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1959f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1960f9e3033fSDedy Lansky */ 1961f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 19625bd60982SLior David struct wil6210_vif *vif, 196310590c6aSGidon Studinski struct wil_ring *ring, 1964f9e3033fSDedy Lansky bool check_stop) 1965f9e3033fSDedy Lansky { 1966f9e3033fSDedy Lansky int i; 1967df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 1968f9e3033fSDedy Lansky 19695bd60982SLior David if (unlikely(!vif)) 19705bd60982SLior David return; 1971f9e3033fSDedy Lansky 197210590c6aSGidon Studinski if (ring) 19735bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 197410590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19755bd60982SLior David vif->net_queue_stopped); 19765bd60982SLior David else 19775bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19785bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19795bd60982SLior David 19800439a5e0SDedy Lansky if (ring && drop_if_ring_full) 19810439a5e0SDedy Lansky /* no need to stop/wake net queues */ 19820439a5e0SDedy Lansky return; 19830439a5e0SDedy Lansky 19845bd60982SLior David if (check_stop == vif->net_queue_stopped) 1985f9e3033fSDedy Lansky /* net queues already in desired state */ 1986f9e3033fSDedy Lansky return; 1987f9e3033fSDedy Lansky 1988f9e3033fSDedy Lansky if (check_stop) { 198910590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1990f9e3033fSDedy Lansky /* not enough room in the vring */ 19915bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19925bd60982SLior David vif->net_queue_stopped = true; 1993f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1994f9e3033fSDedy Lansky } 1995f9e3033fSDedy Lansky return; 1996f9e3033fSDedy Lansky } 1997f9e3033fSDedy Lansky 1998fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1999fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2000fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 2001fe9ee51eSMaya Erez return; 2002fe9ee51eSMaya Erez 2003f9e3033fSDedy Lansky /* check wake */ 2004df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 200510590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 200610590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 2007f9e3033fSDedy Lansky 200810590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 200910590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 2010f9e3033fSDedy Lansky continue; 2011f9e3033fSDedy Lansky 201210590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 201310590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 201410590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 2015f9e3033fSDedy Lansky return; 2016f9e3033fSDedy Lansky } 2017f9e3033fSDedy Lansky } 2018f9e3033fSDedy Lansky 201910590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 202010590c6aSGidon Studinski /* enough room in the ring */ 2021f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 20225bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 20235bd60982SLior David vif->net_queue_stopped = false; 2024f9e3033fSDedy Lansky } 2025f9e3033fSDedy Lansky } 2026f9e3033fSDedy Lansky 20275bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 202810590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2029f9e3033fSDedy Lansky { 2030f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 203110590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2032f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2033f9e3033fSDedy Lansky } 2034f9e3033fSDedy Lansky 20355bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 203610590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2037f9e3033fSDedy Lansky { 2038f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 203910590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2040f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2041f9e3033fSDedy Lansky } 2042f9e3033fSDedy Lansky 20432be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 20442be7d22fSVladimir Kondratiev { 2045e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2046e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 20473df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 204841d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 20499202d7b6SMaya Erez struct wil_ring *ring; 2050aa27deaaSVladimir Kondratiev static bool pr_once_fw; 20512be7d22fSVladimir Kondratiev int rc; 20522be7d22fSVladimir Kondratiev 2053af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 205433c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2055aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20562be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2057aa27deaaSVladimir Kondratiev pr_once_fw = true; 2058aa27deaaSVladimir Kondratiev } 20592be7d22fSVladimir Kondratiev goto drop; 20602be7d22fSVladimir Kondratiev } 20615bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 20625bd60982SLior David wil_dbg_ratelimited(wil, 20635bd60982SLior David "VIF not connected, packet dropped\n"); 20642be7d22fSVladimir Kondratiev goto drop; 20652be7d22fSVladimir Kondratiev } 2066e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20672be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20682be7d22fSVladimir Kondratiev goto drop; 20692be7d22fSVladimir Kondratiev } 2070aa27deaaSVladimir Kondratiev pr_once_fw = false; 2071d58db4e4SVladimir Kondratiev 20722be7d22fSVladimir Kondratiev /* find vring */ 2073e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2074a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 20759202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2076a895cb8bSLior David } else if (bcast) { 2077e00243faSLior David if (vif->pbss) 2078a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2079a895cb8bSLior David * all stations VRINGs 2080a895cb8bSLior David */ 20819202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2082e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2083a895cb8bSLior David /* AP has a dedicated bcast VRING */ 20849202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2085a895cb8bSLior David else 2086a895cb8bSLior David /* unexpected combination, fallback to duplicating 2087a895cb8bSLior David * the skb in all stations VRINGs 2088a895cb8bSLior David */ 20899202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2090a895cb8bSLior David } else { 2091a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 20929202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 209354ed90a8SVladimir Kondratiev } 20949202d7b6SMaya Erez if (unlikely(!ring)) { 209510590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20962be7d22fSVladimir Kondratiev goto drop; 20972be7d22fSVladimir Kondratiev } 20982be7d22fSVladimir Kondratiev /* set up vring entry */ 20999202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2100d58db4e4SVladimir Kondratiev 21012be7d22fSVladimir Kondratiev switch (rc) { 21022be7d22fSVladimir Kondratiev case 0: 2103f9e3033fSDedy Lansky /* shall we stop net queues? */ 21049202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2105795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 21062be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 21072be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 21082be7d22fSVladimir Kondratiev case -ENOMEM: 21090439a5e0SDedy Lansky if (drop_if_ring_full) 21100439a5e0SDedy Lansky goto drop; 21112be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 21122be7d22fSVladimir Kondratiev default: 2113afda8bb5SVladimir Kondratiev break; /* goto drop; */ 21142be7d22fSVladimir Kondratiev } 21152be7d22fSVladimir Kondratiev drop: 21162be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 21172be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 21182be7d22fSVladimir Kondratiev 21192be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 21202be7d22fSVladimir Kondratiev } 21212be7d22fSVladimir Kondratiev 2122a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2123a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2124a24a3d6aSDedy Lansky { 2125a24a3d6aSDedy Lansky int skb_time_us; 2126a24a3d6aSDedy Lansky int bin; 2127a24a3d6aSDedy Lansky 2128a24a3d6aSDedy Lansky if (!wil->tx_latency) 2129a24a3d6aSDedy Lansky return; 2130a24a3d6aSDedy Lansky 2131a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2132a24a3d6aSDedy Lansky return; 2133a24a3d6aSDedy Lansky 2134a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2135a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2136a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2137a24a3d6aSDedy Lansky 2138a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2139a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2140a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2141a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2142a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2143a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2144a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2145a24a3d6aSDedy Lansky } 2146a24a3d6aSDedy Lansky 21472be7d22fSVladimir Kondratiev /** 21482be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 21492be7d22fSVladimir Kondratiev * 2150e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2151e0287c4aSVladimir Kondratiev * 21522be7d22fSVladimir Kondratiev * Safe to call from IRQ 21532be7d22fSVladimir Kondratiev */ 21545bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 21552be7d22fSVladimir Kondratiev { 21565bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 21575bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 21582be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 215910590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 216010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2161e0287c4aSVladimir Kondratiev int done = 0; 216210590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 216341d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2164c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 21650436fd9aSVladimir Shulman int used_before_complete; 21660436fd9aSVladimir Shulman int used_new; 21672be7d22fSVladimir Kondratiev 216833c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21692be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2170e0287c4aSVladimir Kondratiev return 0; 21712be7d22fSVladimir Kondratiev } 21722be7d22fSVladimir Kondratiev 217333c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2174097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2175097638a0SVladimir Kondratiev return 0; 2176097638a0SVladimir Kondratiev } 2177097638a0SVladimir Kondratiev 2178af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21792be7d22fSVladimir Kondratiev 218010590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 21810436fd9aSVladimir Shulman 218241d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 218341d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 218441d6b093SVladimir Kondratiev 218510590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2186c236658fSVladimir Kondratiev int new_swtail; 2187c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2188c236658fSVladimir Kondratiev /** 2189c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21903d4bde15SVladimir Kondratiev * last fragment. look for it. 21913d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2192c236658fSVladimir Kondratiev */ 2193c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2194c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2195c236658fSVladimir Kondratiev 219610590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 219733c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2198c236658fSVladimir Kondratiev break; 2199c236658fSVladimir Kondratiev 2200c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2201c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 22024de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 22037e594444SVladimir Kondratiev u16 dmalen; 220476dfa4b7SVladimir Kondratiev struct sk_buff *skb; 220576dfa4b7SVladimir Kondratiev 220676dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 220776dfa4b7SVladimir Kondratiev skb = ctx->skb; 220810590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 22094de41befSVladimir Kondratiev 221068ada71eSVladimir Kondratiev *d = *_d; 22114de41befSVladimir Kondratiev 22127e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 221398658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 221498658095SVladimir Kondratiev d->dma.error); 22157743882dSVladimir Kondratiev wil_dbg_txrx(wil, 22165b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 22175b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 22185b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 22195b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 22202be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 22212be7d22fSVladimir Kondratiev 22229202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 22239202d7b6SMaya Erez (union wil_tx_desc *)d, 22249202d7b6SMaya Erez ctx); 2225f88f113aSVladimir Kondratiev 22262be7d22fSVladimir Kondratiev if (skb) { 222733c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2228795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2229795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 223041d6b093SVladimir Kondratiev if (stats) { 223141d6b093SVladimir Kondratiev stats->tx_packets++; 2232c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2233a24a3d6aSDedy Lansky 2234a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2235a24a3d6aSDedy Lansky &wil->sta[cid]); 223641d6b093SVladimir Kondratiev } 2237795ce734SVladimir Kondratiev } else { 2238795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 223941d6b093SVladimir Kondratiev if (stats) 2240c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2241795ce734SVladimir Kondratiev } 2242713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 22432be7d22fSVladimir Kondratiev } 2244f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2245eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 224610590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2247eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2248eb26cff1SMaya Erez * is completed. 2249eb26cff1SMaya Erez */ 2250eb26cff1SMaya Erez wmb(); 2251c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 225203269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 225303269c65SVladimir Kondratiev * so hardware will not try to process this desc., 225403269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 225503269c65SVladimir Kondratiev */ 225610590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2257e0287c4aSVladimir Kondratiev done++; 22582be7d22fSVladimir Kondratiev } 2259c236658fSVladimir Kondratiev } 226067c3e1b4SVladimir Kondratiev 22610436fd9aSVladimir Shulman /* performance monitoring */ 226210590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 226310590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 22640436fd9aSVladimir Shulman used_new, used_before_complete)) { 22650436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 22660436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 22677c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 22687c0acf86SVladimir Kondratiev } 226967c3e1b4SVladimir Kondratiev 2270f9e3033fSDedy Lansky /* shall we wake net queues? */ 2271f9e3033fSDedy Lansky if (done) 22725bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2273e0287c4aSVladimir Kondratiev 2274e0287c4aSVladimir Kondratiev return done; 22752be7d22fSVladimir Kondratiev } 227696c93589SGidon Studinski 227796c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 227896c93589SGidon Studinski { 227996c93589SGidon Studinski return 0; 228096c93589SGidon Studinski } 228196c93589SGidon Studinski 228296c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 228396c93589SGidon Studinski 22847be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 22857be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 22861bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 22877be13fc3SGidon Studinski { 22887be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 22897be13fc3SGidon Studinski 22907be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 22917be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); 22927be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 22937be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 22947be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 22951bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 22967be13fc3SGidon Studinski } 22977be13fc3SGidon Studinski 229896c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 229996c93589SGidon Studinski { 230096c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 230196c93589SGidon Studinski wil_configure_interrupt_moderation; 230296c93589SGidon Studinski /* TX ops */ 23039202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 23049202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 23059202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 230696c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 230796c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 230896c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 230996c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 231096c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 2311b9010f10SAhmad Masri wil->txrx_ops.tx_ring_modify = wil_tx_vring_modify; 231296c93589SGidon Studinski /* RX ops */ 231396c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 23147be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 23157be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 23167be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 23177be13fc3SGidon Studinski wil_get_netif_rx_params; 23187be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2319e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 23207be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 232196c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 232296c93589SGidon Studinski } 2323