12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3e00243faSLior David * Copyright (c) 2018, The Linux Foundation. All rights reserved. 42be7d22fSVladimir Kondratiev * 52be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 62be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 72be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 82be7d22fSVladimir Kondratiev * 92be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 102be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 112be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 122be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 132be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 142be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 152be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 162be7d22fSVladimir Kondratiev */ 172be7d22fSVladimir Kondratiev 182be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 192be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 202be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 212be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 22504937d4SKirshenbaum Erez #include <linux/ip.h> 23504937d4SKirshenbaum Erez #include <linux/ipv6.h> 24504937d4SKirshenbaum Erez #include <net/ipv6.h> 250786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 262be7d22fSVladimir Kondratiev 272be7d22fSVladimir Kondratiev #include "wil6210.h" 282be7d22fSVladimir Kondratiev #include "wmi.h" 292be7d22fSVladimir Kondratiev #include "txrx.h" 3098658095SVladimir Kondratiev #include "trace.h" 317be13fc3SGidon Studinski #include "txrx_edma.h" 322be7d22fSVladimir Kondratiev 332be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3478484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 352be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 362be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 372be7d22fSVladimir Kondratiev 38c406ea7cSVladimir Kondratiev bool rx_align_2; 3978484c44SMaya Erez module_param(rx_align_2, bool, 0444); 40c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 41c406ea7cSVladimir Kondratiev 4252a45702SLior David bool rx_large_buf; 4352a45702SLior David module_param(rx_large_buf, bool, 0444); 4452a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4552a45702SLior David 46c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 47c406ea7cSVladimir Kondratiev { 48c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 49c406ea7cSVladimir Kondratiev } 50c406ea7cSVladimir Kondratiev 5110590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 5210590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 532be7d22fSVladimir Kondratiev { 5410590c6aSGidon Studinski return ring->size / 8; 552be7d22fSVladimir Kondratiev } 562be7d22fSVladimir Kondratiev 5710590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 5810590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 592be7d22fSVladimir Kondratiev { 6010590c6aSGidon Studinski return ring->size / 4; 615bb6423eSVladimir Kondratiev } 625bb6423eSVladimir Kondratiev 63f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 6410590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 65f9e3033fSDedy Lansky { 6610590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 67f9e3033fSDedy Lansky } 68f9e3033fSDedy Lansky 69f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 7010590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 71f9e3033fSDedy Lansky { 7210590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 73f9e3033fSDedy Lansky } 74f9e3033fSDedy Lansky 75fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 76fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 77fe9ee51eSMaya Erez { 78fe9ee51eSMaya Erez int i; 79fe9ee51eSMaya Erez unsigned long data_comp_to; 80fe9ee51eSMaya Erez 81fe9ee51eSMaya Erez for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 8210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 8310590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 8410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 8510590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 86fe9ee51eSMaya Erez 87fe9ee51eSMaya Erez spin_lock(&txdata->lock); 88fe9ee51eSMaya Erez 89fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 90fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 91fe9ee51eSMaya Erez continue; 92fe9ee51eSMaya Erez } 93fe9ee51eSMaya Erez 94fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 95fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 96fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 9710590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 98fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 99fe9ee51eSMaya Erez wil_dbg_pm(wil, 100fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 101fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 102fe9ee51eSMaya Erez return false; 103fe9ee51eSMaya Erez } 104fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 105fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 106fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 107fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 108fe9ee51eSMaya Erez msleep(20); 109fe9ee51eSMaya Erez spin_lock(&txdata->lock); 110fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 111fe9ee51eSMaya Erez break; 112fe9ee51eSMaya Erez } 113fe9ee51eSMaya Erez } 114fe9ee51eSMaya Erez 115fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 116fe9ee51eSMaya Erez } 117fe9ee51eSMaya Erez 118fe9ee51eSMaya Erez return true; 119fe9ee51eSMaya Erez } 120fe9ee51eSMaya Erez 12110590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1222be7d22fSVladimir Kondratiev { 1232be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1242be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1252be7d22fSVladimir Kondratiev uint i; 1262be7d22fSVladimir Kondratiev 127af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1289cf10d62SVladimir Kondratiev 1292be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1302be7d22fSVladimir Kondratiev 1312be7d22fSVladimir Kondratiev vring->swhead = 0; 1322be7d22fSVladimir Kondratiev vring->swtail = 0; 133f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1342be7d22fSVladimir Kondratiev if (!vring->ctx) { 1352be7d22fSVladimir Kondratiev vring->va = NULL; 1362be7d22fSVladimir Kondratiev return -ENOMEM; 1372be7d22fSVladimir Kondratiev } 138f2de576dSHamad Kadmany 1390436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 140f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 141f2de576dSHamad Kadmany * 142f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 143f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1443dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1453dc2c13bSLazar Alexei * allocation before allocating vring memory. 146f2de576dSHamad Kadmany * 147f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 148f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 149f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1502be7d22fSVladimir Kondratiev */ 1513dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 152f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 153f2de576dSHamad Kadmany 1542be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1552be7d22fSVladimir Kondratiev if (!vring->va) { 1562be7d22fSVladimir Kondratiev kfree(vring->ctx); 1572be7d22fSVladimir Kondratiev vring->ctx = NULL; 1582be7d22fSVladimir Kondratiev return -ENOMEM; 1592be7d22fSVladimir Kondratiev } 160f2de576dSHamad Kadmany 1613dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1623dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1633dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 164f2de576dSHamad Kadmany 1652be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1662be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1672be7d22fSVladimir Kondratiev * we can use any 1682be7d22fSVladimir Kondratiev */ 1692be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 17010590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 17110590c6aSGidon Studinski &vring->va[i].tx.legacy; 1728fe59627SVladimir Kondratiev 17368ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1742be7d22fSVladimir Kondratiev } 1752be7d22fSVladimir Kondratiev 17639c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 17739c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1782be7d22fSVladimir Kondratiev 1792be7d22fSVladimir Kondratiev return 0; 1802be7d22fSVladimir Kondratiev } 1812be7d22fSVladimir Kondratiev 1829202d7b6SMaya Erez static void wil_txdesc_unmap(struct device *dev, union wil_tx_desc *desc, 1832232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1842232abd5SVladimir Kondratiev { 1859202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 1862232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1872232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1888fe59627SVladimir Kondratiev 1892232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1902232abd5SVladimir Kondratiev case wil_mapped_as_single: 1912232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1922232abd5SVladimir Kondratiev break; 1932232abd5SVladimir Kondratiev case wil_mapped_as_page: 1942232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1952232abd5SVladimir Kondratiev break; 1962232abd5SVladimir Kondratiev default: 1972232abd5SVladimir Kondratiev break; 1982232abd5SVladimir Kondratiev } 1992232abd5SVladimir Kondratiev } 2002232abd5SVladimir Kondratiev 20196c93589SGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring) 2022be7d22fSVladimir Kondratiev { 2032be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2042be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2052be7d22fSVladimir Kondratiev 2069b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 20796c93589SGidon Studinski if (!vring->is_rx) { 20810590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 209ef77285fSVladimir Kondratiev 210ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 211ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 212ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 213ef77285fSVladimir Kondratiev } else { 214ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 215ef77285fSVladimir Kondratiev vring->size, vring->va, 216ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 217ef77285fSVladimir Kondratiev } 218ef77285fSVladimir Kondratiev 21910590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 22068ada71eSVladimir Kondratiev dma_addr_t pa; 2217e594444SVladimir Kondratiev u16 dmalen; 222f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 22368ada71eSVladimir Kondratiev 22496c93589SGidon Studinski if (!vring->is_rx) { 22568ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 22668ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 22710590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 22868ada71eSVladimir Kondratiev 229f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 23034b8886eSMaya Erez if (!ctx) { 23134b8886eSMaya Erez wil_dbg_txrx(wil, 23234b8886eSMaya Erez "ctx(%d) was already completed\n", 23334b8886eSMaya Erez vring->swtail); 23410590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 23534b8886eSMaya Erez continue; 23634b8886eSMaya Erez } 23768ada71eSVladimir Kondratiev *d = *_d; 2389202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 239f88f113aSVladimir Kondratiev if (ctx->skb) 240f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 24110590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2422be7d22fSVladimir Kondratiev } else { /* rx */ 24368ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 24468ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 24510590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 24668ada71eSVladimir Kondratiev 247f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 24868ada71eSVladimir Kondratiev *d = *_d; 24968ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2507e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2517e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 252f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 25310590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2542be7d22fSVladimir Kondratiev } 2552be7d22fSVladimir Kondratiev } 2562be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2572be7d22fSVladimir Kondratiev kfree(vring->ctx); 2582be7d22fSVladimir Kondratiev vring->pa = 0; 2592be7d22fSVladimir Kondratiev vring->va = NULL; 2602be7d22fSVladimir Kondratiev vring->ctx = NULL; 2612be7d22fSVladimir Kondratiev } 2622be7d22fSVladimir Kondratiev 2632be7d22fSVladimir Kondratiev /** 2642be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2652be7d22fSVladimir Kondratiev * 2662be7d22fSVladimir Kondratiev * Safe to call from IRQ 2672be7d22fSVladimir Kondratiev */ 26810590c6aSGidon Studinski static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct wil_ring *vring, 2692be7d22fSVladimir Kondratiev u32 i, int headroom) 2702be7d22fSVladimir Kondratiev { 2712be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 27252a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 27368ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 27410590c6aSGidon Studinski volatile struct vring_rx_desc *_d = &vring->va[i].rx.legacy; 2752be7d22fSVladimir Kondratiev dma_addr_t pa; 2762be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2778fe59627SVladimir Kondratiev 2782be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2792be7d22fSVladimir Kondratiev return -ENOMEM; 2802be7d22fSVladimir Kondratiev 2812be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2822be7d22fSVladimir Kondratiev skb_put(skb, sz); 2832be7d22fSVladimir Kondratiev 2842be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2852be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2862be7d22fSVladimir Kondratiev kfree_skb(skb); 2872be7d22fSVladimir Kondratiev return -ENOMEM; 2882be7d22fSVladimir Kondratiev } 2892be7d22fSVladimir Kondratiev 29048c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29168ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2922be7d22fSVladimir Kondratiev /* ip_length don't care */ 2932be7d22fSVladimir Kondratiev /* b11 don't care */ 2942be7d22fSVladimir Kondratiev /* error don't care */ 2952be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2967e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 29768ada71eSVladimir Kondratiev *_d = *d; 298f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2992be7d22fSVladimir Kondratiev 3002be7d22fSVladimir Kondratiev return 0; 3012be7d22fSVladimir Kondratiev } 3022be7d22fSVladimir Kondratiev 3032be7d22fSVladimir Kondratiev /** 3042be7d22fSVladimir Kondratiev * Adds radiotap header 3052be7d22fSVladimir Kondratiev * 3062be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3072be7d22fSVladimir Kondratiev * 3082be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3092be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3102be7d22fSVladimir Kondratiev * - Phy info 3112be7d22fSVladimir Kondratiev */ 3122be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 31333e61169SVladimir Kondratiev struct sk_buff *skb) 3142be7d22fSVladimir Kondratiev { 3152be7d22fSVladimir Kondratiev struct wil6210_rtap { 3162be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3172be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3182be7d22fSVladimir Kondratiev /* flags */ 3192be7d22fSVladimir Kondratiev u8 flags; 3202be7d22fSVladimir Kondratiev /* channel */ 3212be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3222be7d22fSVladimir Kondratiev __le16 chnl_flags; 3232be7d22fSVladimir Kondratiev /* MCS */ 3242be7d22fSVladimir Kondratiev u8 mcs_present; 3252be7d22fSVladimir Kondratiev u8 mcs_flags; 3262be7d22fSVladimir Kondratiev u8 mcs_index; 3272be7d22fSVladimir Kondratiev } __packed; 3282be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3292be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3302be7d22fSVladimir Kondratiev /* vendor */ 3312be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3322be7d22fSVladimir Kondratiev u8 vendor_ns; 3332be7d22fSVladimir Kondratiev __le16 vendor_skip; 3342be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3352be7d22fSVladimir Kondratiev } __packed; 33633e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3372be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3382be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3392be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3402be7d22fSVladimir Kondratiev static char phy_data[128]; 3417d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3422be7d22fSVladimir Kondratiev 3432be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3442be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3452be7d22fSVladimir Kondratiev /* calculate additional length */ 3462be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3472be7d22fSVladimir Kondratiev /** 3482be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3492be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3502be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3512be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3522be7d22fSVladimir Kondratiev */ 3532be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3542be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3558fe59627SVladimir Kondratiev 3562be7d22fSVladimir Kondratiev if (len > 8) { 3572be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3582be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3598fe59627SVladimir Kondratiev 3602be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3612be7d22fSVladimir Kondratiev phy_length = len - 8; 3622be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3632be7d22fSVladimir Kondratiev } 3642be7d22fSVladimir Kondratiev } 3652be7d22fSVladimir Kondratiev } 3662be7d22fSVladimir Kondratiev rtap_len += phy_length; 3672be7d22fSVladimir Kondratiev } 3682be7d22fSVladimir Kondratiev 3692be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3702be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3719165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3722be7d22fSVladimir Kondratiev return; 3732be7d22fSVladimir Kondratiev } 3742be7d22fSVladimir Kondratiev 375d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 3762be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3772be7d22fSVladimir Kondratiev 3782be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3792be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3802be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3812be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3822be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3832be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3842be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3852be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3862be7d22fSVladimir Kondratiev 3872be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3882be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3892be7d22fSVladimir Kondratiev 3902be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3912be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3922be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3932be7d22fSVladimir Kondratiev 3942be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3952be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 3962be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 3972be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 3982be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 3992be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 4002be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4012be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4022be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4032be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4042be7d22fSVladimir Kondratiev phy_length); 4052be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4062be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4072be7d22fSVladimir Kondratiev phy_length); 4082be7d22fSVladimir Kondratiev } 4092be7d22fSVladimir Kondratiev } 4102be7d22fSVladimir Kondratiev 4117be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 412fe9ee51eSMaya Erez { 413fe9ee51eSMaya Erez struct vring_rx_desc *_d; 41410590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 415fe9ee51eSMaya Erez 41610590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 417fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 418fe9ee51eSMaya Erez return false; 419fe9ee51eSMaya Erez 420fe9ee51eSMaya Erez return true; 421fe9ee51eSMaya Erez } 422fe9ee51eSMaya Erez 4232be7d22fSVladimir Kondratiev /** 4242be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4252be7d22fSVladimir Kondratiev * 42633e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 42733e61169SVladimir Kondratiev * 4282be7d22fSVladimir Kondratiev * Safe to call from IRQ 4292be7d22fSVladimir Kondratiev */ 4302be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 43110590c6aSGidon Studinski struct wil_ring *vring) 4322be7d22fSVladimir Kondratiev { 4332be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4345bd60982SLior David struct wil6210_vif *vif; 4355bd60982SLior David struct net_device *ndev; 43668ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 43768ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4382be7d22fSVladimir Kondratiev struct sk_buff *skb; 4392be7d22fSVladimir Kondratiev dma_addr_t pa; 440c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 44152a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4427e594444SVladimir Kondratiev u16 dmalen; 4432be7d22fSVladimir Kondratiev u8 ftype; 4445bd60982SLior David int cid, mid; 4453b282bc6SVladimir Kondratiev int i; 446c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 447c8b78b5fSVladimir Kondratiev 44833e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 44933e61169SVladimir Kondratiev 4503b282bc6SVladimir Kondratiev again: 45110590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4522be7d22fSVladimir Kondratiev return NULL; 4532be7d22fSVladimir Kondratiev 4543b282bc6SVladimir Kondratiev i = (int)vring->swhead; 45510590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 45633c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4572be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4582be7d22fSVladimir Kondratiev return NULL; 4592be7d22fSVladimir Kondratiev } 4602be7d22fSVladimir Kondratiev 461148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 462148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 46310590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 464148416a9SVladimir Kondratiev if (!skb) { 465148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4663b282bc6SVladimir Kondratiev goto again; 467148416a9SVladimir Kondratiev } 46868ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 46968ada71eSVladimir Kondratiev *d = *_d; 47068ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 47168ada71eSVladimir Kondratiev 47268ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 47368ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 47468ada71eSVladimir Kondratiev 475148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 476148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 477a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 47868ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 47968ada71eSVladimir Kondratiev 4803b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4815bd60982SLior David mid = wil_rxdesc_mid(d); 4825bd60982SLior David vif = wil->vifs[mid]; 4835bd60982SLior David 4845bd60982SLior David if (unlikely(!vif)) { 4855bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4865bd60982SLior David mid); 4875bd60982SLior David kfree_skb(skb); 4885bd60982SLior David goto again; 4895bd60982SLior David } 4905bd60982SLior David ndev = vif_to_ndev(vif); 4913b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4923b282bc6SVladimir Kondratiev 49333c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 494e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4953b282bc6SVladimir Kondratiev stats->rx_large_frame++; 496110dea00SWei Yongjun kfree_skb(skb); 4973b282bc6SVladimir Kondratiev goto again; 498e270045bSVladimir Kondratiev } 4997e594444SVladimir Kondratiev skb_trim(skb, dmalen); 50033e61169SVladimir Kondratiev 5011cbbcb08SVladimir Kondratiev prefetch(skb->data); 5021cbbcb08SVladimir Kondratiev 503c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 504c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 505c0d37713SVladimir Kondratiev 506c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 507c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 508c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5092be7d22fSVladimir Kondratiev 5102be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5112be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 51233e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5132be7d22fSVladimir Kondratiev 5142be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5152be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5162be7d22fSVladimir Kondratiev return skb; 517a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5182be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5192be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5202be7d22fSVladimir Kondratiev */ 52168ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 52233c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 523a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 524a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 525a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 526a8313341SVladimir Kondratiev 527a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 528a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 529a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5303b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 531a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 532a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 533a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 534a8313341SVladimir Kondratiev mid, cid, tid, seq); 5355bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 536a8313341SVladimir Kondratiev } else { 537a8313341SVladimir Kondratiev /* print again all info. One can enable only this 538a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 539a8313341SVladimir Kondratiev */ 540a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 541a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 542a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 543a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 544a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 545a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 546a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 547a8313341SVladimir Kondratiev } 5482be7d22fSVladimir Kondratiev kfree_skb(skb); 5493b282bc6SVladimir Kondratiev goto again; 5502be7d22fSVladimir Kondratiev } 5512be7d22fSVladimir Kondratiev 552c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5532be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5543b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5552be7d22fSVladimir Kondratiev kfree_skb(skb); 5563b282bc6SVladimir Kondratiev goto again; 5572be7d22fSVladimir Kondratiev } 5582be7d22fSVladimir Kondratiev 559504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 560504937d4SKirshenbaum Erez * and in case of error drop the packet 561504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 562504937d4SKirshenbaum Erez */ 56333c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 564504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 56533c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 566504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5674a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5684a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5694a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5704a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5714a68ab10SVladimir Kondratiev */ 572504937d4SKirshenbaum Erez } 573504937d4SKirshenbaum Erez 574c406ea7cSVladimir Kondratiev if (snaplen) { 575c406ea7cSVladimir Kondratiev /* Packet layout 576c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 577c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 578c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 579c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 580c406ea7cSVladimir Kondratiev */ 581c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 582c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 583c406ea7cSVladimir Kondratiev } 584c406ea7cSVladimir Kondratiev 5852be7d22fSVladimir Kondratiev return skb; 5862be7d22fSVladimir Kondratiev } 5872be7d22fSVladimir Kondratiev 5882be7d22fSVladimir Kondratiev /** 5892be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5902be7d22fSVladimir Kondratiev * buffers posted at @swtail 5915bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 5925bd60982SLior David * allocate skbs with headroom according to main interface only. This 5935bd60982SLior David * means it will not work with monitor interface together with other VIFs. 5945bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 5955bd60982SLior David * and we will need to fix this code once we add support. 5962be7d22fSVladimir Kondratiev */ 5972be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5982be7d22fSVladimir Kondratiev { 599e00243faSLior David struct net_device *ndev = wil->main_ndev; 60010590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6012be7d22fSVladimir Kondratiev u32 next_tail; 6022be7d22fSVladimir Kondratiev int rc = 0; 6032be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6042be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6052be7d22fSVladimir Kondratiev 60610590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6072be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6082be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6092be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 61033c477fdSVladimir Kondratiev if (unlikely(rc)) { 6113d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6122be7d22fSVladimir Kondratiev rc, v->swtail); 6132be7d22fSVladimir Kondratiev break; 6142be7d22fSVladimir Kondratiev } 6152be7d22fSVladimir Kondratiev } 616ab6d7cc3SMaya Erez 617ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 618ab6d7cc3SMaya Erez * committing them to HW 619ab6d7cc3SMaya Erez */ 620ab6d7cc3SMaya Erez wmb(); 621ab6d7cc3SMaya Erez 622b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6232be7d22fSVladimir Kondratiev 6242be7d22fSVladimir Kondratiev return rc; 6252be7d22fSVladimir Kondratiev } 6262be7d22fSVladimir Kondratiev 62758527421SVladimir Kondratiev /** 62858527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 62958527421SVladimir Kondratiev * @cs: One area of memory 63058527421SVladimir Kondratiev * @ct: Another area of memory 63158527421SVladimir Kondratiev * @count: The size of the area. 63258527421SVladimir Kondratiev * 63358527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 63458527421SVladimir Kondratiev * with minimal modifications 63558527421SVladimir Kondratiev */ 6367be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 63758527421SVladimir Kondratiev { 63858527421SVladimir Kondratiev const unsigned char *su1, *su2; 63958527421SVladimir Kondratiev int res = 0; 64058527421SVladimir Kondratiev 64158527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 64258527421SVladimir Kondratiev --su1, --su2, count--) { 64358527421SVladimir Kondratiev res = *su1 - *su2; 64458527421SVladimir Kondratiev if (res) 64558527421SVladimir Kondratiev break; 64658527421SVladimir Kondratiev } 64758527421SVladimir Kondratiev return res; 64858527421SVladimir Kondratiev } 64958527421SVladimir Kondratiev 65058527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 65158527421SVladimir Kondratiev { 65258527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 65358527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 65458527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 65558527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 65658527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 65758527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 65858527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 65958527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 66058527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 66158527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 66258527421SVladimir Kondratiev 66358527421SVladimir Kondratiev if (!cc->key_set) { 66458527421SVladimir Kondratiev wil_err_ratelimited(wil, 66558527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 66658527421SVladimir Kondratiev cid, tid, mc, key_id); 66758527421SVladimir Kondratiev return -EINVAL; 66858527421SVladimir Kondratiev } 66958527421SVladimir Kondratiev 67058527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 67158527421SVladimir Kondratiev wil_err_ratelimited(wil, 67258527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 67358527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 67458527421SVladimir Kondratiev return -EINVAL; 67558527421SVladimir Kondratiev } 67658527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 67758527421SVladimir Kondratiev 67858527421SVladimir Kondratiev return 0; 67958527421SVladimir Kondratiev } 68058527421SVladimir Kondratiev 6817be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 6827be13fc3SGidon Studinski int *security) 6837be13fc3SGidon Studinski { 6847be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 6857be13fc3SGidon Studinski 6867be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 6877be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 6887be13fc3SGidon Studinski } 6897be13fc3SGidon Studinski 6902be7d22fSVladimir Kondratiev /* 6912be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 692e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6932be7d22fSVladimir Kondratiev */ 694b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6952be7d22fSVladimir Kondratiev { 696c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 697e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 698c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 699e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 7002be7d22fSVladimir Kondratiev unsigned int len = skb->len; 7017be13fc3SGidon Studinski int cid; 7027be13fc3SGidon Studinski int security; 703c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 704c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 705c42da999SVladimir Kondratiev * is not suitable, need to look at data 706c42da999SVladimir Kondratiev */ 707c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 7087be13fc3SGidon Studinski struct wil_net_stats *stats; 709c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 710c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 711c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 712c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 713c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 714c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 715c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 716c42da999SVladimir Kondratiev }; 7172be7d22fSVladimir Kondratiev 7187be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 7197be13fc3SGidon Studinski 7207be13fc3SGidon Studinski stats = &wil->sta[cid].stats; 7217be13fc3SGidon Studinski 7220553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7230553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7240553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7250553640dSVladimir Shulman * mechanism, core will be chosen according 7260553640dSVladimir Shulman * to user-level rps configuration. 7270553640dSVladimir Shulman */ 7280553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7290553640dSVladimir Shulman 730241804cbSVladimir Kondratiev skb_orphan(skb); 731241804cbSVladimir Kondratiev 7327be13fc3SGidon Studinski if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 73358527421SVladimir Kondratiev rc = GRO_DROP; 73458527421SVladimir Kondratiev dev_kfree_skb(skb); 73558527421SVladimir Kondratiev stats->rx_replay++; 73658527421SVladimir Kondratiev goto stats; 73758527421SVladimir Kondratiev } 73858527421SVladimir Kondratiev 739e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 740c42da999SVladimir Kondratiev if (mcast) { 741c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 742c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 743c42da999SVladimir Kondratiev */ 744c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 745c42da999SVladimir Kondratiev } else { 746e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 747e00243faSLior David eth->h_dest); 7482be7d22fSVladimir Kondratiev 749c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 750c42da999SVladimir Kondratiev /* The destination station is associated to 751c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 752c42da999SVladimir Kondratiev * directly to it and do not pass it to local 753c42da999SVladimir Kondratiev * net stack. 754c42da999SVladimir Kondratiev */ 755c42da999SVladimir Kondratiev xmit_skb = skb; 756c42da999SVladimir Kondratiev skb = NULL; 757c42da999SVladimir Kondratiev } 758c42da999SVladimir Kondratiev } 759c42da999SVladimir Kondratiev } 760c42da999SVladimir Kondratiev if (xmit_skb) { 761c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 762c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 763c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 764c42da999SVladimir Kondratiev */ 765c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 766c42da999SVladimir Kondratiev xmit_skb->priority += 256; 767c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 768c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 769c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 770c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 771c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 772c42da999SVladimir Kondratiev } 773c42da999SVladimir Kondratiev 774c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 775c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 7765bd60982SLior David skb->dev = ndev; 777c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 778c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 779c42da999SVladimir Kondratiev len, gro_res_str[rc]); 780c42da999SVladimir Kondratiev } 78158527421SVladimir Kondratiev stats: 782c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 783b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 784b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 785b5998e6aSVladimir Kondratiev stats->rx_dropped++; 786b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 787b5998e6aSVladimir Kondratiev } else { 7882be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 789c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7902be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 791c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 792c42da999SVladimir Kondratiev if (mcast) 793c42da999SVladimir Kondratiev ndev->stats.multicast++; 794194b482bSVladimir Kondratiev } 7952be7d22fSVladimir Kondratiev } 7962be7d22fSVladimir Kondratiev 7972be7d22fSVladimir Kondratiev /** 7982be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7992be7d22fSVladimir Kondratiev * 800e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8012be7d22fSVladimir Kondratiev */ 802e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8032be7d22fSVladimir Kondratiev { 804e00243faSLior David struct net_device *ndev = wil->main_ndev; 805e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 80610590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 8072be7d22fSVladimir Kondratiev struct sk_buff *skb; 8082be7d22fSVladimir Kondratiev 80933c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8102be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8112be7d22fSVladimir Kondratiev return; 8122be7d22fSVladimir Kondratiev } 813af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 814e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 815e0287c4aSVladimir Kondratiev (*quota)--; 8162be7d22fSVladimir Kondratiev 817e00243faSLior David /* monitor is currently supported on main interface only */ 818e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8192be7d22fSVladimir Kondratiev skb->dev = ndev; 8202be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8212be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8222be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8232be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 824b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8252be7d22fSVladimir Kondratiev } else { 826b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8272be7d22fSVladimir Kondratiev } 8282be7d22fSVladimir Kondratiev } 8292be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8302be7d22fSVladimir Kondratiev } 8312be7d22fSVladimir Kondratiev 83252a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 83352a45702SLior David { 83452a45702SLior David wil->rx_buf_len = rx_large_buf ? 83552a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 83652a45702SLior David if (mtu_max > wil->rx_buf_len) { 83752a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 83852a45702SLior David * backward compatibility (mtu_max parameter was also used 83952a45702SLior David * to support receiving large packets) 84052a45702SLior David */ 84152a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 84252a45702SLior David wil->rx_buf_len = mtu_max; 84352a45702SLior David } 84452a45702SLior David } 84552a45702SLior David 84696c93589SGidon Studinski static int wil_rx_init(struct wil6210_priv *wil, u16 size) 8472be7d22fSVladimir Kondratiev { 84810590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8492be7d22fSVladimir Kondratiev int rc; 8502be7d22fSVladimir Kondratiev 851af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8529cf10d62SVladimir Kondratiev 8538bf6adb9SVladimir Kondratiev if (vring->va) { 8548bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8558bf6adb9SVladimir Kondratiev return -EINVAL; 8568bf6adb9SVladimir Kondratiev } 8578bf6adb9SVladimir Kondratiev 85852a45702SLior David wil_rx_buf_len_init(wil); 85952a45702SLior David 860d3762b40SVladimir Kondratiev vring->size = size; 86196c93589SGidon Studinski vring->is_rx = true; 8622be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8632be7d22fSVladimir Kondratiev if (rc) 8642be7d22fSVladimir Kondratiev return rc; 8652be7d22fSVladimir Kondratiev 86647e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8672be7d22fSVladimir Kondratiev if (rc) 8682be7d22fSVladimir Kondratiev goto err_free; 8692be7d22fSVladimir Kondratiev 8702be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8712be7d22fSVladimir Kondratiev if (rc) 8722be7d22fSVladimir Kondratiev goto err_free; 8732be7d22fSVladimir Kondratiev 8742be7d22fSVladimir Kondratiev return 0; 8752be7d22fSVladimir Kondratiev err_free: 87696c93589SGidon Studinski wil_vring_free(wil, vring); 8772be7d22fSVladimir Kondratiev 8782be7d22fSVladimir Kondratiev return rc; 8792be7d22fSVladimir Kondratiev } 8802be7d22fSVladimir Kondratiev 88196c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 8822be7d22fSVladimir Kondratiev { 88310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8842be7d22fSVladimir Kondratiev 885af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8869cf10d62SVladimir Kondratiev 8872acb4220SVladimir Kondratiev if (vring->va) 88896c93589SGidon Studinski wil_vring_free(wil, vring); 8892be7d22fSVladimir Kondratiev } 8902be7d22fSVladimir Kondratiev 8919202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 8929202d7b6SMaya Erez u32 len, int vring_index) 8939202d7b6SMaya Erez { 8949202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 8959202d7b6SMaya Erez 8969202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 8979202d7b6SMaya Erez d->dma.ip_length = 0; 8989202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 8999202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 9009202d7b6SMaya Erez d->dma.error = 0; 9019202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 9029202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 9039202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 9049202d7b6SMaya Erez d->mac.d[0] = 0; 9059202d7b6SMaya Erez d->mac.d[1] = 0; 9069202d7b6SMaya Erez d->mac.d[2] = 0; 9079202d7b6SMaya Erez d->mac.ucode_cmd = 0; 9089202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 9099202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 9109202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 9119202d7b6SMaya Erez 9129202d7b6SMaya Erez return 0; 9139202d7b6SMaya Erez } 9149202d7b6SMaya Erez 91596c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 916875e9439SMaya Erez { 917875e9439SMaya Erez spin_lock_bh(&txdata->lock); 918875e9439SMaya Erez txdata->dot1x_open = 0; 919875e9439SMaya Erez txdata->enabled = 0; 920875e9439SMaya Erez txdata->idle = 0; 921875e9439SMaya Erez txdata->last_idle = 0; 922875e9439SMaya Erez txdata->begin = 0; 923875e9439SMaya Erez txdata->agg_wsize = 0; 924875e9439SMaya Erez txdata->agg_timeout = 0; 925875e9439SMaya Erez txdata->agg_amsdu = 0; 926875e9439SMaya Erez txdata->addba_in_progress = false; 927e00243faSLior David txdata->mid = U8_MAX; 928875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 929875e9439SMaya Erez } 930875e9439SMaya Erez 93196c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9322be7d22fSVladimir Kondratiev int cid, int tid) 9332be7d22fSVladimir Kondratiev { 934e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9352be7d22fSVladimir Kondratiev int rc; 9362be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9372be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9382be7d22fSVladimir Kondratiev .vring_cfg = { 9392be7d22fSVladimir Kondratiev .tx_sw_ring = { 9409a06bec9SVladimir Kondratiev .max_mpdu_size = 941c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 942b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9432be7d22fSVladimir Kondratiev }, 9442be7d22fSVladimir Kondratiev .ringid = id, 945a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9462be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9472be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9482be7d22fSVladimir Kondratiev .to_resolution = 0, 9493277213fSVladimir Kondratiev .agg_max_wsize = 0, 9502be7d22fSVladimir Kondratiev .schd_params = { 9512be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9522be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9532be7d22fSVladimir Kondratiev }, 9542be7d22fSVladimir Kondratiev }, 9552be7d22fSVladimir Kondratiev }; 9562be7d22fSVladimir Kondratiev struct { 957b874ddecSLior David struct wmi_cmd_hdr wmi; 9582be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 959807b0860SAlexei Avshalom Lazar } __packed reply = { 960807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 961807b0860SAlexei Avshalom Lazar }; 96210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 96310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 9642be7d22fSVladimir Kondratiev 965af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 966e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9679b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9689cf10d62SVladimir Kondratiev 9692be7d22fSVladimir Kondratiev if (vring->va) { 9702be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9712be7d22fSVladimir Kondratiev rc = -EINVAL; 9722be7d22fSVladimir Kondratiev goto out; 9732be7d22fSVladimir Kondratiev } 9742be7d22fSVladimir Kondratiev 975875e9439SMaya Erez wil_tx_data_init(txdata); 97696c93589SGidon Studinski vring->is_rx = false; 9772be7d22fSVladimir Kondratiev vring->size = size; 9782be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9792be7d22fSVladimir Kondratiev if (rc) 9802be7d22fSVladimir Kondratiev goto out; 9812be7d22fSVladimir Kondratiev 98210590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 98310590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 98493ae6d49SVladimir Kondratiev 9852be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9862be7d22fSVladimir Kondratiev 987e00243faSLior David if (!vif->privacy) 988230d8442SVladimir Kondratiev txdata->dot1x_open = true; 989e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9902be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9912be7d22fSVladimir Kondratiev if (rc) 9922be7d22fSVladimir Kondratiev goto out_free; 9932be7d22fSVladimir Kondratiev 994b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9952be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9962be7d22fSVladimir Kondratiev reply.cmd.status); 997c331997bSVladimir Kondratiev rc = -EINVAL; 9982be7d22fSVladimir Kondratiev goto out_free; 9992be7d22fSVladimir Kondratiev } 10002be7d22fSVladimir Kondratiev 1001dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1002dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1003e00243faSLior David txdata->mid = vif->mid; 1004097638a0SVladimir Kondratiev txdata->enabled = 1; 1005dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1006dc90506fSMaya Erez 1007230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 10083a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1009097638a0SVladimir Kondratiev 10102be7d22fSVladimir Kondratiev return 0; 10112be7d22fSVladimir Kondratiev out_free: 1012875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1013230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1014230d8442SVladimir Kondratiev txdata->enabled = 0; 1015875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 101696c93589SGidon Studinski wil_vring_free(wil, vring); 101710590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 101810590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 10190916d9f2SMaya Erez 10202be7d22fSVladimir Kondratiev out: 10212be7d22fSVladimir Kondratiev 10222be7d22fSVladimir Kondratiev return rc; 10232be7d22fSVladimir Kondratiev } 10242be7d22fSVladimir Kondratiev 1025e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 102641d6b093SVladimir Kondratiev { 1027e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 102841d6b093SVladimir Kondratiev int rc; 102941d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 103041d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 103141d6b093SVladimir Kondratiev .vring_cfg = { 103241d6b093SVladimir Kondratiev .tx_sw_ring = { 103341d6b093SVladimir Kondratiev .max_mpdu_size = 103441d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 103541d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 103641d6b093SVladimir Kondratiev }, 103741d6b093SVladimir Kondratiev .ringid = id, 103841d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 103941d6b093SVladimir Kondratiev }, 104041d6b093SVladimir Kondratiev }; 104141d6b093SVladimir Kondratiev struct { 1042b874ddecSLior David struct wmi_cmd_hdr wmi; 104341d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1044807b0860SAlexei Avshalom Lazar } __packed reply = { 1045807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1046807b0860SAlexei Avshalom Lazar }; 104710590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 104810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 104941d6b093SVladimir Kondratiev 1050af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 105141d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10529b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 105341d6b093SVladimir Kondratiev 105441d6b093SVladimir Kondratiev if (vring->va) { 105541d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 105641d6b093SVladimir Kondratiev rc = -EINVAL; 105741d6b093SVladimir Kondratiev goto out; 105841d6b093SVladimir Kondratiev } 105941d6b093SVladimir Kondratiev 1060875e9439SMaya Erez wil_tx_data_init(txdata); 106196c93589SGidon Studinski vring->is_rx = false; 106241d6b093SVladimir Kondratiev vring->size = size; 106341d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 106441d6b093SVladimir Kondratiev if (rc) 106541d6b093SVladimir Kondratiev goto out; 106641d6b093SVladimir Kondratiev 106710590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 106810590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 106941d6b093SVladimir Kondratiev 107041d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 107141d6b093SVladimir Kondratiev 1072e00243faSLior David if (!vif->privacy) 1073230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1074e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1075e00243faSLior David &cmd, sizeof(cmd), 107641d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 107741d6b093SVladimir Kondratiev if (rc) 107841d6b093SVladimir Kondratiev goto out_free; 107941d6b093SVladimir Kondratiev 108041d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 108141d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 108241d6b093SVladimir Kondratiev reply.cmd.status); 108341d6b093SVladimir Kondratiev rc = -EINVAL; 108441d6b093SVladimir Kondratiev goto out_free; 108541d6b093SVladimir Kondratiev } 108641d6b093SVladimir Kondratiev 1087dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1088dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1089e00243faSLior David txdata->mid = vif->mid; 109041d6b093SVladimir Kondratiev txdata->enabled = 1; 1091dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 109241d6b093SVladimir Kondratiev 109341d6b093SVladimir Kondratiev return 0; 109441d6b093SVladimir Kondratiev out_free: 1095875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1096230d8442SVladimir Kondratiev txdata->enabled = 0; 1097230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1098875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 109996c93589SGidon Studinski wil_vring_free(wil, vring); 110041d6b093SVladimir Kondratiev out: 110141d6b093SVladimir Kondratiev 110241d6b093SVladimir Kondratiev return rc; 110341d6b093SVladimir Kondratiev } 110441d6b093SVladimir Kondratiev 110510590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1106e00243faSLior David struct wil6210_vif *vif, 11072be7d22fSVladimir Kondratiev struct sk_buff *skb) 11082be7d22fSVladimir Kondratiev { 11093df2cd36SVladimir Kondratiev int i; 11103df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1111e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 111296c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 11132be7d22fSVladimir Kondratiev 11143df2cd36SVladimir Kondratiev if (cid < 0) 11153df2cd36SVladimir Kondratiev return NULL; 11163df2cd36SVladimir Kondratiev 11173df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 111896c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 111910590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 112010590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1121230d8442SVladimir Kondratiev continue; 112210590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 112310590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 112410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11258fe59627SVladimir Kondratiev 1126af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1127af3db60aSLazar Alexei eth->h_dest, i); 1128b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11292be7d22fSVladimir Kondratiev return v; 11303df2cd36SVladimir Kondratiev } else { 1131af3db60aSLazar Alexei wil_dbg_txrx(wil, 1132af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1133af3db60aSLazar Alexei i); 11343df2cd36SVladimir Kondratiev return NULL; 11353df2cd36SVladimir Kondratiev } 11363df2cd36SVladimir Kondratiev } 11373df2cd36SVladimir Kondratiev } 11382be7d22fSVladimir Kondratiev 11392be7d22fSVladimir Kondratiev return NULL; 11402be7d22fSVladimir Kondratiev } 11412be7d22fSVladimir Kondratiev 11429202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 11439202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 114454ed90a8SVladimir Kondratiev 114510590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1146e00243faSLior David struct wil6210_vif *vif, 114754ed90a8SVladimir Kondratiev struct sk_buff *skb) 114854ed90a8SVladimir Kondratiev { 114910590c6aSGidon Studinski struct wil_ring *ring; 115054ed90a8SVladimir Kondratiev int i; 115154ed90a8SVladimir Kondratiev u8 cid; 115210590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 115396c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 115454ed90a8SVladimir Kondratiev 115554ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 115654ed90a8SVladimir Kondratiev * for the AP we connected to. 1157230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 115854ed90a8SVladimir Kondratiev */ 115996c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 116010590c6aSGidon Studinski ring = &wil->ring_tx[i]; 116110590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 116210590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 116354ed90a8SVladimir Kondratiev continue; 116454ed90a8SVladimir Kondratiev 116510590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 116641d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116741d6b093SVladimir Kondratiev continue; 116841d6b093SVladimir Kondratiev 116910590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 117010590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1171230d8442SVladimir Kondratiev continue; 117254ed90a8SVladimir Kondratiev 117354ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 117454ed90a8SVladimir Kondratiev 117510590c6aSGidon Studinski return ring; 117654ed90a8SVladimir Kondratiev } 117754ed90a8SVladimir Kondratiev 117810590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 117954ed90a8SVladimir Kondratiev 118054ed90a8SVladimir Kondratiev return NULL; 118154ed90a8SVladimir Kondratiev } 118254ed90a8SVladimir Kondratiev 118370812421SVladimir Kondratiev /* Use one of 2 strategies: 118470812421SVladimir Kondratiev * 118570812421SVladimir Kondratiev * 1. New (real broadcast): 118670812421SVladimir Kondratiev * use dedicated broadcast vring 118770812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 118870812421SVladimir Kondratiev * Find 1-st vring and return it; 118970812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 119070812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 119170812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 119270812421SVladimir Kondratiev * - for PBSS 119370812421SVladimir Kondratiev */ 119410590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1195e00243faSLior David struct wil6210_vif *vif, 1196fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1197fb3cac57SVladimir Kondratiev { 119810590c6aSGidon Studinski struct wil_ring *v; 119910590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 120010590c6aSGidon Studinski int i = vif->bcast_ring; 1201fb3cac57SVladimir Kondratiev 120241d6b093SVladimir Kondratiev if (i < 0) 120341d6b093SVladimir Kondratiev return NULL; 120410590c6aSGidon Studinski v = &wil->ring_tx[i]; 120510590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1206b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1207fb3cac57SVladimir Kondratiev return NULL; 120810590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 120910590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1210230d8442SVladimir Kondratiev return NULL; 1211fb3cac57SVladimir Kondratiev 1212fb3cac57SVladimir Kondratiev return v; 1213fb3cac57SVladimir Kondratiev } 1214fb3cac57SVladimir Kondratiev 121570812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 121670812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 121770812421SVladimir Kondratiev { 121870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 121910590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 122070812421SVladimir Kondratiev 122170812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 122270812421SVladimir Kondratiev } 122370812421SVladimir Kondratiev 122410590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1225e00243faSLior David struct wil6210_vif *vif, 122670812421SVladimir Kondratiev struct sk_buff *skb) 122770812421SVladimir Kondratiev { 122810590c6aSGidon Studinski struct wil_ring *v, *v2; 122970812421SVladimir Kondratiev struct sk_buff *skb2; 123070812421SVladimir Kondratiev int i; 123170812421SVladimir Kondratiev u8 cid; 123270812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 123370812421SVladimir Kondratiev char *src = eth->h_source; 123410590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 123596c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 123670812421SVladimir Kondratiev 123770812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 123896c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 123910590c6aSGidon Studinski v = &wil->ring_tx[i]; 124010590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1241e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 124270812421SVladimir Kondratiev continue; 124370812421SVladimir Kondratiev 124410590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 124570812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 124670812421SVladimir Kondratiev continue; 124710590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 124810590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 124970812421SVladimir Kondratiev continue; 125070812421SVladimir Kondratiev 125170812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 125270812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 125370812421SVladimir Kondratiev continue; 125470812421SVladimir Kondratiev 125570812421SVladimir Kondratiev goto found; 125670812421SVladimir Kondratiev } 125770812421SVladimir Kondratiev 125870812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 125970812421SVladimir Kondratiev 126070812421SVladimir Kondratiev return NULL; 126170812421SVladimir Kondratiev 126270812421SVladimir Kondratiev found: 126370812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 126470812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 126570812421SVladimir Kondratiev 126670812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 126770812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 126810590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 126910590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1270e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 127170812421SVladimir Kondratiev continue; 127210590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 127370812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 127470812421SVladimir Kondratiev continue; 127510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 127610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 127770812421SVladimir Kondratiev continue; 127870812421SVladimir Kondratiev 127970812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 128070812421SVladimir Kondratiev continue; 128170812421SVladimir Kondratiev 128270812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 128370812421SVladimir Kondratiev if (skb2) { 128470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 128570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 12869202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 128770812421SVladimir Kondratiev } else { 128870812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 128970812421SVladimir Kondratiev } 129070812421SVladimir Kondratiev } 129170812421SVladimir Kondratiev 129270812421SVladimir Kondratiev return v; 129370812421SVladimir Kondratiev } 129470812421SVladimir Kondratiev 1295c236658fSVladimir Kondratiev static inline 1296c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1297c236658fSVladimir Kondratiev { 12983d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1299c236658fSVladimir Kondratiev } 1300c236658fSVladimir Kondratiev 13013d4bde15SVladimir Kondratiev /** 13023d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13033d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13043d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13053d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13063d4bde15SVladimir Kondratiev */ 13073d4bde15SVladimir Kondratiev 13083d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13093d4bde15SVladimir Kondratiev struct sk_buff *skb, 13103d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13113d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1312504937d4SKirshenbaum Erez { 13133d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13143d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13153d4bde15SVladimir Kondratiev 13163d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13173d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13183d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13193d4bde15SVladimir Kondratiev 13203d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13213d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13223d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13233d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13243d4bde15SVladimir Kondratiev 13253d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13263d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13273d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13283d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13293d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13303d4bde15SVladimir Kondratiev } 13313d4bde15SVladimir Kondratiev 13323d4bde15SVladimir Kondratiev /** 13333d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13343d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13353d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13363d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13373d4bde15SVladimir Kondratiev * 13383d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13393d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13403d4bde15SVladimir Kondratiev */ 13413d4bde15SVladimir Kondratiev 13423d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13433d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1344504937d4SKirshenbaum Erez int protocol; 1345504937d4SKirshenbaum Erez 1346504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1347504937d4SKirshenbaum Erez return 0; 1348504937d4SKirshenbaum Erez 1349df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1350df2d08eeSVladimir Kondratiev 1351504937d4SKirshenbaum Erez switch (skb->protocol) { 1352504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1353504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1354df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1355504937d4SKirshenbaum Erez break; 1356504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1357504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1358504937d4SKirshenbaum Erez break; 1359504937d4SKirshenbaum Erez default: 1360504937d4SKirshenbaum Erez return -EINVAL; 1361504937d4SKirshenbaum Erez } 1362504937d4SKirshenbaum Erez 1363504937d4SKirshenbaum Erez switch (protocol) { 1364504937d4SKirshenbaum Erez case IPPROTO_TCP: 1365504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1366504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1367504937d4SKirshenbaum Erez d->dma.d0 |= 1368504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1369504937d4SKirshenbaum Erez break; 1370504937d4SKirshenbaum Erez case IPPROTO_UDP: 1371504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1372504937d4SKirshenbaum Erez d->dma.d0 |= 1373504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1374504937d4SKirshenbaum Erez break; 1375504937d4SKirshenbaum Erez default: 1376504937d4SKirshenbaum Erez return -EINVAL; 1377504937d4SKirshenbaum Erez } 1378504937d4SKirshenbaum Erez 1379504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1380504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1381504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1382504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1383504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1384504937d4SKirshenbaum Erez 1385504937d4SKirshenbaum Erez return 0; 1386504937d4SKirshenbaum Erez } 1387504937d4SKirshenbaum Erez 13883d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 13893d4bde15SVladimir Kondratiev { 13903d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 13913d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 13923d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 13933d4bde15SVladimir Kondratiev } 13943d4bde15SVladimir Kondratiev 13953d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 13963d4bde15SVladimir Kondratiev { 13973d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 13983d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 13993d4bde15SVladimir Kondratiev } 14003d4bde15SVladimir Kondratiev 1401e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 140210590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 14033d4bde15SVladimir Kondratiev { 14043d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14053d4bde15SVladimir Kondratiev 14063d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14073d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14083d4bde15SVladimir Kondratiev *_first_desc = NULL; 14093d4bde15SVladimir Kondratiev 14103d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14113d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14123d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14133d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14143d4bde15SVladimir Kondratiev 14153d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14163d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14173d4bde15SVladimir Kondratiev 14183d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14193d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14203d4bde15SVladimir Kondratiev 14213d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 142210590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14233d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14243d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14253d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14263d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 142710590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 142810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14293d4bde15SVladimir Kondratiev uint i = swhead; 14303d4bde15SVladimir Kondratiev dma_addr_t pa; 14313d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14323d4bde15SVladimir Kondratiev int rem_data = mss; 14333d4bde15SVladimir Kondratiev int lenmss; 14343d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14353d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14363d4bde15SVladimir Kondratiev bool is_ipv4; 14373d4bde15SVladimir Kondratiev int tcp_hdr_len; 14383d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14393d4bde15SVladimir Kondratiev int gso_type; 1440e3d2ed94SHamad Kadmany int rc = -EINVAL; 14413d4bde15SVladimir Kondratiev 1442af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1443af3db60aSLazar Alexei vring_index); 14443d4bde15SVladimir Kondratiev 14453d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14463d4bde15SVladimir Kondratiev return -EINVAL; 14473d4bde15SVladimir Kondratiev 14483d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14493d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14503d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14513d4bde15SVladimir Kondratiev * this is the initial check only. 14523d4bde15SVladimir Kondratiev */ 14533d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14543d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14553d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14563d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14573d4bde15SVladimir Kondratiev return -ENOMEM; 14583d4bde15SVladimir Kondratiev } 14593d4bde15SVladimir Kondratiev 14603d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14613d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14623d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14633d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14643d4bde15SVladimir Kondratiev 14653d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14663d4bde15SVladimir Kondratiev switch (gso_type) { 14673d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14683d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14693d4bde15SVladimir Kondratiev * as required by the offloading doc 14703d4bde15SVladimir Kondratiev */ 14713d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14723d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14733d4bde15SVladimir Kondratiev is_ipv4 = true; 14743d4bde15SVladimir Kondratiev break; 14753d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14763d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 14773d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 14783d4bde15SVladimir Kondratiev is_ipv4 = false; 14793d4bde15SVladimir Kondratiev break; 14803d4bde15SVladimir Kondratiev default: 14813d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 14823d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 14833d4bde15SVladimir Kondratiev */ 14843d4bde15SVladimir Kondratiev return -EINVAL; 14853d4bde15SVladimir Kondratiev } 14863d4bde15SVladimir Kondratiev 14873d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 14883d4bde15SVladimir Kondratiev return -EINVAL; 14893d4bde15SVladimir Kondratiev 14903d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 14913d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 14923d4bde15SVladimir Kondratiev */ 14933d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 14943d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 14953d4bde15SVladimir Kondratiev 149610590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 14973d4bde15SVladimir Kondratiev 14983d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 14993d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15003d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15013d4bde15SVladimir Kondratiev goto err_exit; 15023d4bde15SVladimir Kondratiev } 15033d4bde15SVladimir Kondratiev 15049202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 15059202d7b6SMaya Erez hdrlen, vring_index); 15063d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15073d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15083d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15093d4bde15SVladimir Kondratiev 15103d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15113d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15123d4bde15SVladimir Kondratiev 15133d4bde15SVladimir Kondratiev descs_used++; 15143d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15153d4bde15SVladimir Kondratiev 15163d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15173d4bde15SVladimir Kondratiev if (headlen) { 15183d4bde15SVladimir Kondratiev len = headlen; 15193d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15203d4bde15SVladimir Kondratiev len); 15213d4bde15SVladimir Kondratiev } else { 15223d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15233d4bde15SVladimir Kondratiev len = frag->size; 15243d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15253d4bde15SVladimir Kondratiev } 15263d4bde15SVladimir Kondratiev 15273d4bde15SVladimir Kondratiev while (len) { 15283d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15293d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15303d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15313d4bde15SVladimir Kondratiev 15323d4bde15SVladimir Kondratiev if (descs_used == avail) { 1533e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1534e3d2ed94SHamad Kadmany rc = -ENOMEM; 1535e3d2ed94SHamad Kadmany goto mem_error; 15363d4bde15SVladimir Kondratiev } 15373d4bde15SVladimir Kondratiev 15383d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15393d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15403d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15413d4bde15SVladimir Kondratiev 15423d4bde15SVladimir Kondratiev if (!headlen) { 15433d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15443d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15453d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15463d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15473d4bde15SVladimir Kondratiev } else { 15483d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15493d4bde15SVladimir Kondratiev skb->data + 15503d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15513d4bde15SVladimir Kondratiev lenmss, 15523d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15533d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15543d4bde15SVladimir Kondratiev headlen -= lenmss; 15553d4bde15SVladimir Kondratiev } 15563d4bde15SVladimir Kondratiev 1557e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1558e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1559e3d2ed94SHamad Kadmany goto mem_error; 1560e3d2ed94SHamad Kadmany } 15613d4bde15SVladimir Kondratiev 156210590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 15633d4bde15SVladimir Kondratiev 15643d4bde15SVladimir Kondratiev if (!_first_desc) { 15653d4bde15SVladimir Kondratiev _first_desc = _desc; 15663d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15673d4bde15SVladimir Kondratiev d = first_desc; 15683d4bde15SVladimir Kondratiev } else { 15693d4bde15SVladimir Kondratiev d = &desc_mem; 15703d4bde15SVladimir Kondratiev } 15713d4bde15SVladimir Kondratiev 15729202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 15739202d7b6SMaya Erez pa, lenmss, vring_index); 15743d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15753d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15763d4bde15SVladimir Kondratiev skb_net_hdr_len); 15773d4bde15SVladimir Kondratiev 15783d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 15793d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 15803d4bde15SVladimir Kondratiev 15813d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 15823d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 15833d4bde15SVladimir Kondratiev len -= lenmss; 15843d4bde15SVladimir Kondratiev rem_data -= lenmss; 15853d4bde15SVladimir Kondratiev 15863d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15873d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 15883d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 15893d4bde15SVladimir Kondratiev 15903d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 15913d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 15923d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 15933d4bde15SVladimir Kondratiev /* first segment include hdr desc for 15943d4bde15SVladimir Kondratiev * release 15953d4bde15SVladimir Kondratiev */ 15963d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 15973d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 15983d4bde15SVladimir Kondratiev sg_desc_cnt + 15993d4bde15SVladimir Kondratiev 1); 16003d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16013d4bde15SVladimir Kondratiev } else { 16023d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16033d4bde15SVladimir Kondratiev sg_desc_cnt); 16043d4bde15SVladimir Kondratiev } 16053d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16063d4bde15SVladimir Kondratiev 16073d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16083d4bde15SVladimir Kondratiev 16093d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16103d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16113d4bde15SVladimir Kondratiev * it twice 16123d4bde15SVladimir Kondratiev */ 16133d4bde15SVladimir Kondratiev if (first_desc != d) 16143d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16153d4bde15SVladimir Kondratiev 16163d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16173d4bde15SVladimir Kondratiev * of this TS processing 16183d4bde15SVladimir Kondratiev */ 16193d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16203d4bde15SVladimir Kondratiev *_desc = *d; 16213d4bde15SVladimir Kondratiev 16223d4bde15SVladimir Kondratiev rem_data = mss; 16233d4bde15SVladimir Kondratiev _first_desc = NULL; 16243d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16253d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16263d4bde15SVladimir Kondratiev *_desc = *d; 16273d4bde15SVladimir Kondratiev } 16283d4bde15SVladimir Kondratiev } 16293d4bde15SVladimir Kondratiev 16303d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16313d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16323d4bde15SVladimir Kondratiev */ 16333d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16343d4bde15SVladimir Kondratiev d = first_desc; 16353d4bde15SVladimir Kondratiev 16363d4bde15SVladimir Kondratiev /* Last data descriptor */ 16373d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16383d4bde15SVladimir Kondratiev *_desc = *d; 16393d4bde15SVladimir Kondratiev 16403d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16413d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16423d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16433d4bde15SVladimir Kondratiev 16443d4bde15SVladimir Kondratiev /* hold reference to skb 16453d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16463d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16473d4bde15SVladimir Kondratiev */ 16483d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16493d4bde15SVladimir Kondratiev 16503d4bde15SVladimir Kondratiev /* performance monitoring */ 165110590c6aSGidon Studinski used = wil_ring_used_tx(vring); 165210590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 16533d4bde15SVladimir Kondratiev used, used + descs_used)) { 16543d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16553d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16563d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16573d4bde15SVladimir Kondratiev } 16583d4bde15SVladimir Kondratiev 1659eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1660eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1661eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1662eb26cff1SMaya Erez * skb before it was completed. 1663eb26cff1SMaya Erez */ 1664eb26cff1SMaya Erez wmb(); 1665eb26cff1SMaya Erez 16663d4bde15SVladimir Kondratiev /* advance swhead */ 166710590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1668e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16693d4bde15SVladimir Kondratiev 16703d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16713d4bde15SVladimir Kondratiev * committing them to HW 16723d4bde15SVladimir Kondratiev */ 16733d4bde15SVladimir Kondratiev wmb(); 16743d4bde15SVladimir Kondratiev 1675b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16763d4bde15SVladimir Kondratiev return 0; 16773d4bde15SVladimir Kondratiev 1678e3d2ed94SHamad Kadmany mem_error: 16793d4bde15SVladimir Kondratiev while (descs_used > 0) { 16803d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 16813d4bde15SVladimir Kondratiev 1682a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 168310590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 168410590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 16853d4bde15SVladimir Kondratiev *d = *_desc; 16863d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 16873d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 16889202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 16893d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 16903d4bde15SVladimir Kondratiev descs_used--; 16913d4bde15SVladimir Kondratiev } 16923d4bde15SVladimir Kondratiev err_exit: 1693e3d2ed94SHamad Kadmany return rc; 16943d4bde15SVladimir Kondratiev } 16953d4bde15SVladimir Kondratiev 16969202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 16979202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 16982be7d22fSVladimir Kondratiev { 16992be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 170068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 170168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17029202d7b6SMaya Erez u32 swhead = ring->swhead; 17039202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 17042be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1705504937d4SKirshenbaum Erez uint f = 0; 17069202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 17079202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 17082be7d22fSVladimir Kondratiev uint i = swhead; 17092be7d22fSVladimir Kondratiev dma_addr_t pa; 17100436fd9aSVladimir Shulman int used; 17119202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 171241d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17132be7d22fSVladimir Kondratiev 171410590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 17159202d7b6SMaya Erez skb->len, ring_index, nr_frags); 17162be7d22fSVladimir Kondratiev 17175933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17185933a06dSVladimir Kondratiev return -EINVAL; 17195933a06dSVladimir Kondratiev 172033c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 172170801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17225b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17239202d7b6SMaya Erez ring_index, 1 + nr_frags); 17242be7d22fSVladimir Kondratiev return -ENOMEM; 17252be7d22fSVladimir Kondratiev } 17269202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17272be7d22fSVladimir Kondratiev 17288fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17292be7d22fSVladimir Kondratiev 17309202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 17315b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17327743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17332be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17342be7d22fSVladimir Kondratiev 17352be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17362be7d22fSVladimir Kondratiev return -EINVAL; 17379202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 17382be7d22fSVladimir Kondratiev /* 1-st segment */ 17399202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 17409202d7b6SMaya Erez ring_index); 174141d6b093SVladimir Kondratiev if (unlikely(mcast)) { 174241d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1743230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 174441d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 174541d6b093SVladimir Kondratiev } 1746504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17473d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17485b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 17499202d7b6SMaya Erez ring_index); 1750504937d4SKirshenbaum Erez goto dma_error; 1751504937d4SKirshenbaum Erez } 1752504937d4SKirshenbaum Erez 17539202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 17543d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 175568ada71eSVladimir Kondratiev 17562be7d22fSVladimir Kondratiev /* middle segments */ 1757504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17582be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17592be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17602be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17618fe59627SVladimir Kondratiev 1762e59d16c0SVladimir Kondratiev *_d = *d; 17639202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 17645b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17655b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17669202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 17679202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17682be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17692be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1770e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1771e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 17729202d7b6SMaya Erez ring_index); 17732be7d22fSVladimir Kondratiev goto dma_error; 1774e3d2ed94SHamad Kadmany } 17759202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 17769202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 17779202d7b6SMaya Erez pa, len, ring_index); 1778c236658fSVladimir Kondratiev /* no need to check return code - 1779c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1780c236658fSVladimir Kondratiev * it will succeed here too 1781c236658fSVladimir Kondratiev */ 17823d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 17832be7d22fSVladimir Kondratiev } 17842be7d22fSVladimir Kondratiev /* for the last seg only */ 17852be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1786668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 17872be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 178868ada71eSVladimir Kondratiev *_d = *d; 17899202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 17905b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17915b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17922be7d22fSVladimir Kondratiev 17936cdadd4dSVladimir Kondratiev /* hold reference to skb 17946cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 17956cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 17966cdadd4dSVladimir Kondratiev */ 17979202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 17986cdadd4dSVladimir Kondratiev 17990436fd9aSVladimir Shulman /* performance monitoring */ 18009202d7b6SMaya Erez used = wil_ring_used_tx(ring); 180110590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 18020436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18037c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18040436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18059202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 18060436fd9aSVladimir Shulman } 18077c0acf86SVladimir Kondratiev 1808eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1809eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1810eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1811eb26cff1SMaya Erez * skb before it was completed. 1812eb26cff1SMaya Erez */ 1813eb26cff1SMaya Erez wmb(); 1814eb26cff1SMaya Erez 18152be7d22fSVladimir Kondratiev /* advance swhead */ 18169202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 18179202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 18189202d7b6SMaya Erez ring->swhead); 18199202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 18203d4bde15SVladimir Kondratiev 18213d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18223d4bde15SVladimir Kondratiev * committing them to HW 18233d4bde15SVladimir Kondratiev */ 18243d4bde15SVladimir Kondratiev wmb(); 18253d4bde15SVladimir Kondratiev 18269202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 18272be7d22fSVladimir Kondratiev 18282be7d22fSVladimir Kondratiev return 0; 18292be7d22fSVladimir Kondratiev dma_error: 18302be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1831c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1832c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1833c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18347e594444SVladimir Kondratiev 18359202d7b6SMaya Erez i = (swhead + f) % ring->size; 18369202d7b6SMaya Erez ctx = &ring->ctx[i]; 18379202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 183868ada71eSVladimir Kondratiev *d = *_d; 183968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18409202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 18419202d7b6SMaya Erez (union wil_tx_desc *)d, 18429202d7b6SMaya Erez ctx); 1843f88f113aSVladimir Kondratiev 1844f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18452be7d22fSVladimir Kondratiev } 18462be7d22fSVladimir Kondratiev 18472be7d22fSVladimir Kondratiev return -EINVAL; 18482be7d22fSVladimir Kondratiev } 18492be7d22fSVladimir Kondratiev 18509202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 18519202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 18525933a06dSVladimir Kondratiev { 18539202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 185410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 18555933a06dSVladimir Kondratiev int rc; 18565933a06dSVladimir Kondratiev 18575933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18583d4bde15SVladimir Kondratiev 1859fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1860fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1861fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1862fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1863fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1864fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1865fe9ee51eSMaya Erez return -EINVAL; 1866fe9ee51eSMaya Erez } 1867fe9ee51eSMaya Erez 18689202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 18699202d7b6SMaya Erez (wil, vif, ring, skb); 18703d4bde15SVladimir Kondratiev 18715933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 18723d4bde15SVladimir Kondratiev 18735933a06dSVladimir Kondratiev return rc; 18745933a06dSVladimir Kondratiev } 18755933a06dSVladimir Kondratiev 1876f9e3033fSDedy Lansky /** 1877f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 18785bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1879f9e3033fSDedy Lansky * 1880f9e3033fSDedy Lansky * This function does one of two checks: 1881f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1882f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1883f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1884f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1885f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1886f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1887f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1888f9e3033fSDedy Lansky * 1889f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1890f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1891f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1892f9e3033fSDedy Lansky */ 1893f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 18945bd60982SLior David struct wil6210_vif *vif, 189510590c6aSGidon Studinski struct wil_ring *ring, 1896f9e3033fSDedy Lansky bool check_stop) 1897f9e3033fSDedy Lansky { 1898f9e3033fSDedy Lansky int i; 1899f9e3033fSDedy Lansky 19005bd60982SLior David if (unlikely(!vif)) 19015bd60982SLior David return; 1902f9e3033fSDedy Lansky 190310590c6aSGidon Studinski if (ring) 19045bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 190510590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19065bd60982SLior David vif->net_queue_stopped); 19075bd60982SLior David else 19085bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19095bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19105bd60982SLior David 19115bd60982SLior David if (check_stop == vif->net_queue_stopped) 1912f9e3033fSDedy Lansky /* net queues already in desired state */ 1913f9e3033fSDedy Lansky return; 1914f9e3033fSDedy Lansky 1915f9e3033fSDedy Lansky if (check_stop) { 191610590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1917f9e3033fSDedy Lansky /* not enough room in the vring */ 19185bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19195bd60982SLior David vif->net_queue_stopped = true; 1920f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1921f9e3033fSDedy Lansky } 1922f9e3033fSDedy Lansky return; 1923f9e3033fSDedy Lansky } 1924f9e3033fSDedy Lansky 1925fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1926fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1927fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1928fe9ee51eSMaya Erez return; 1929fe9ee51eSMaya Erez 1930f9e3033fSDedy Lansky /* check wake */ 1931f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 193210590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 193310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 1934f9e3033fSDedy Lansky 193510590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 193610590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 1937f9e3033fSDedy Lansky continue; 1938f9e3033fSDedy Lansky 193910590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 194010590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 194110590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 1942f9e3033fSDedy Lansky return; 1943f9e3033fSDedy Lansky } 1944f9e3033fSDedy Lansky } 1945f9e3033fSDedy Lansky 194610590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 194710590c6aSGidon Studinski /* enough room in the ring */ 1948f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 19495bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 19505bd60982SLior David vif->net_queue_stopped = false; 1951f9e3033fSDedy Lansky } 1952f9e3033fSDedy Lansky } 1953f9e3033fSDedy Lansky 19545bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 195510590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 1956f9e3033fSDedy Lansky { 1957f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 195810590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 1959f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1960f9e3033fSDedy Lansky } 1961f9e3033fSDedy Lansky 19625bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 196310590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 1964f9e3033fSDedy Lansky { 1965f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 196610590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 1967f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1968f9e3033fSDedy Lansky } 1969f9e3033fSDedy Lansky 19702be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19712be7d22fSVladimir Kondratiev { 1972e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 1973e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 19743df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 197541d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 19769202d7b6SMaya Erez struct wil_ring *ring; 1977aa27deaaSVladimir Kondratiev static bool pr_once_fw; 19782be7d22fSVladimir Kondratiev int rc; 19792be7d22fSVladimir Kondratiev 1980af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 198133c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1982aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 19832be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 1984aa27deaaSVladimir Kondratiev pr_once_fw = true; 1985aa27deaaSVladimir Kondratiev } 19862be7d22fSVladimir Kondratiev goto drop; 19872be7d22fSVladimir Kondratiev } 19885bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 19895bd60982SLior David wil_dbg_ratelimited(wil, 19905bd60982SLior David "VIF not connected, packet dropped\n"); 19912be7d22fSVladimir Kondratiev goto drop; 19922be7d22fSVladimir Kondratiev } 1993e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 19942be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 19952be7d22fSVladimir Kondratiev goto drop; 19962be7d22fSVladimir Kondratiev } 1997aa27deaaSVladimir Kondratiev pr_once_fw = false; 1998d58db4e4SVladimir Kondratiev 19992be7d22fSVladimir Kondratiev /* find vring */ 2000e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2001a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 20029202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2003a895cb8bSLior David } else if (bcast) { 2004e00243faSLior David if (vif->pbss) 2005a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2006a895cb8bSLior David * all stations VRINGs 2007a895cb8bSLior David */ 20089202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2009e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2010a895cb8bSLior David /* AP has a dedicated bcast VRING */ 20119202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2012a895cb8bSLior David else 2013a895cb8bSLior David /* unexpected combination, fallback to duplicating 2014a895cb8bSLior David * the skb in all stations VRINGs 2015a895cb8bSLior David */ 20169202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2017a895cb8bSLior David } else { 2018a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 20199202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 202054ed90a8SVladimir Kondratiev } 20219202d7b6SMaya Erez if (unlikely(!ring)) { 202210590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20232be7d22fSVladimir Kondratiev goto drop; 20242be7d22fSVladimir Kondratiev } 20252be7d22fSVladimir Kondratiev /* set up vring entry */ 20269202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2027d58db4e4SVladimir Kondratiev 20282be7d22fSVladimir Kondratiev switch (rc) { 20292be7d22fSVladimir Kondratiev case 0: 2030f9e3033fSDedy Lansky /* shall we stop net queues? */ 20319202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2032795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20332be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20342be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20352be7d22fSVladimir Kondratiev case -ENOMEM: 20362be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20372be7d22fSVladimir Kondratiev default: 2038afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20392be7d22fSVladimir Kondratiev } 20402be7d22fSVladimir Kondratiev drop: 20412be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20422be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20432be7d22fSVladimir Kondratiev 20442be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20452be7d22fSVladimir Kondratiev } 20462be7d22fSVladimir Kondratiev 20472be7d22fSVladimir Kondratiev /** 20482be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 20492be7d22fSVladimir Kondratiev * 2050e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2051e0287c4aSVladimir Kondratiev * 20522be7d22fSVladimir Kondratiev * Safe to call from IRQ 20532be7d22fSVladimir Kondratiev */ 20545bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 20552be7d22fSVladimir Kondratiev { 20565bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 20575bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 20582be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 205910590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 206010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2061e0287c4aSVladimir Kondratiev int done = 0; 206210590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 206341d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2064c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20650436fd9aSVladimir Shulman int used_before_complete; 20660436fd9aSVladimir Shulman int used_new; 20672be7d22fSVladimir Kondratiev 206833c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 20692be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2070e0287c4aSVladimir Kondratiev return 0; 20712be7d22fSVladimir Kondratiev } 20722be7d22fSVladimir Kondratiev 207333c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2074097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2075097638a0SVladimir Kondratiev return 0; 2076097638a0SVladimir Kondratiev } 2077097638a0SVladimir Kondratiev 2078af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 20792be7d22fSVladimir Kondratiev 208010590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 20810436fd9aSVladimir Shulman 208241d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 208341d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 208441d6b093SVladimir Kondratiev 208510590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2086c236658fSVladimir Kondratiev int new_swtail; 2087c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2088c236658fSVladimir Kondratiev /** 2089c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 20903d4bde15SVladimir Kondratiev * last fragment. look for it. 20913d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2092c236658fSVladimir Kondratiev */ 2093c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2094c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2095c236658fSVladimir Kondratiev 209610590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 209733c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2098c236658fSVladimir Kondratiev break; 2099c236658fSVladimir Kondratiev 2100c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2101c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21024de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21037e594444SVladimir Kondratiev u16 dmalen; 210476dfa4b7SVladimir Kondratiev struct sk_buff *skb; 210576dfa4b7SVladimir Kondratiev 210676dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 210776dfa4b7SVladimir Kondratiev skb = ctx->skb; 210810590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 21094de41befSVladimir Kondratiev 211068ada71eSVladimir Kondratiev *d = *_d; 21114de41befSVladimir Kondratiev 21127e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 211398658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 211498658095SVladimir Kondratiev d->dma.error); 21157743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21165b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21175b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21185b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21195b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21202be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21212be7d22fSVladimir Kondratiev 21229202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21239202d7b6SMaya Erez (union wil_tx_desc *)d, 21249202d7b6SMaya Erez ctx); 2125f88f113aSVladimir Kondratiev 21262be7d22fSVladimir Kondratiev if (skb) { 212733c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2128795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2129795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 213041d6b093SVladimir Kondratiev if (stats) { 213141d6b093SVladimir Kondratiev stats->tx_packets++; 2132c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 213341d6b093SVladimir Kondratiev } 2134795ce734SVladimir Kondratiev } else { 2135795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 213641d6b093SVladimir Kondratiev if (stats) 2137c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2138795ce734SVladimir Kondratiev } 2139713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21402be7d22fSVladimir Kondratiev } 2141f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2142eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 214310590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2144eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2145eb26cff1SMaya Erez * is completed. 2146eb26cff1SMaya Erez */ 2147eb26cff1SMaya Erez wmb(); 2148c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 214903269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 215003269c65SVladimir Kondratiev * so hardware will not try to process this desc., 215103269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 215203269c65SVladimir Kondratiev */ 215310590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2154e0287c4aSVladimir Kondratiev done++; 21552be7d22fSVladimir Kondratiev } 2156c236658fSVladimir Kondratiev } 215767c3e1b4SVladimir Kondratiev 21580436fd9aSVladimir Shulman /* performance monitoring */ 215910590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 216010590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 21610436fd9aSVladimir Shulman used_new, used_before_complete)) { 21620436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21630436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 21647c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 21657c0acf86SVladimir Kondratiev } 216667c3e1b4SVladimir Kondratiev 2167f9e3033fSDedy Lansky /* shall we wake net queues? */ 2168f9e3033fSDedy Lansky if (done) 21695bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2170e0287c4aSVladimir Kondratiev 2171e0287c4aSVladimir Kondratiev return done; 21722be7d22fSVladimir Kondratiev } 217396c93589SGidon Studinski 217496c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 217596c93589SGidon Studinski { 217696c93589SGidon Studinski return 0; 217796c93589SGidon Studinski } 217896c93589SGidon Studinski 217996c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 218096c93589SGidon Studinski 21817be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 21827be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 21837be13fc3SGidon Studinski int *mid, u16 *seq, int *mcast) 21847be13fc3SGidon Studinski { 21857be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 21867be13fc3SGidon Studinski 21877be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 21887be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); 21897be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 21907be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 21917be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 21927be13fc3SGidon Studinski } 21937be13fc3SGidon Studinski 219496c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 219596c93589SGidon Studinski { 219696c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 219796c93589SGidon Studinski wil_configure_interrupt_moderation; 219896c93589SGidon Studinski /* TX ops */ 21999202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 22009202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 22019202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 220296c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 220396c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 220496c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 220596c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 220696c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 220796c93589SGidon Studinski /* RX ops */ 220896c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 22097be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 22107be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 22117be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 22127be13fc3SGidon Studinski wil_get_netif_rx_params; 22137be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 22147be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 221596c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 221696c93589SGidon Studinski } 2217