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 2840b853210SMaya Erez /** 2850b853210SMaya Erez * Make sure that the network stack calculates checksum for packets 2860b853210SMaya Erez * which failed the HW checksum calculation 2870b853210SMaya Erez */ 2880b853210SMaya Erez skb->ip_summed = CHECKSUM_NONE; 2890b853210SMaya Erez 2902be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2912be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2922be7d22fSVladimir Kondratiev kfree_skb(skb); 2932be7d22fSVladimir Kondratiev return -ENOMEM; 2942be7d22fSVladimir Kondratiev } 2952be7d22fSVladimir Kondratiev 29648c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29768ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2982be7d22fSVladimir Kondratiev /* ip_length don't care */ 2992be7d22fSVladimir Kondratiev /* b11 don't care */ 3002be7d22fSVladimir Kondratiev /* error don't care */ 3012be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3027e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 30368ada71eSVladimir Kondratiev *_d = *d; 304f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3052be7d22fSVladimir Kondratiev 3062be7d22fSVladimir Kondratiev return 0; 3072be7d22fSVladimir Kondratiev } 3082be7d22fSVladimir Kondratiev 3092be7d22fSVladimir Kondratiev /** 3102be7d22fSVladimir Kondratiev * Adds radiotap header 3112be7d22fSVladimir Kondratiev * 3122be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3132be7d22fSVladimir Kondratiev * 3142be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3152be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3162be7d22fSVladimir Kondratiev * - Phy info 3172be7d22fSVladimir Kondratiev */ 3182be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 31933e61169SVladimir Kondratiev struct sk_buff *skb) 3202be7d22fSVladimir Kondratiev { 3212be7d22fSVladimir Kondratiev struct wil6210_rtap { 3222be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3232be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3242be7d22fSVladimir Kondratiev /* flags */ 3252be7d22fSVladimir Kondratiev u8 flags; 3262be7d22fSVladimir Kondratiev /* channel */ 3272be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3282be7d22fSVladimir Kondratiev __le16 chnl_flags; 3292be7d22fSVladimir Kondratiev /* MCS */ 3302be7d22fSVladimir Kondratiev u8 mcs_present; 3312be7d22fSVladimir Kondratiev u8 mcs_flags; 3322be7d22fSVladimir Kondratiev u8 mcs_index; 3332be7d22fSVladimir Kondratiev } __packed; 3342be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3352be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3362be7d22fSVladimir Kondratiev /* vendor */ 3372be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3382be7d22fSVladimir Kondratiev u8 vendor_ns; 3392be7d22fSVladimir Kondratiev __le16 vendor_skip; 3402be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3412be7d22fSVladimir Kondratiev } __packed; 34233e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3432be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3442be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3452be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3462be7d22fSVladimir Kondratiev static char phy_data[128]; 3477d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3482be7d22fSVladimir Kondratiev 3492be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3502be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3512be7d22fSVladimir Kondratiev /* calculate additional length */ 3522be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3532be7d22fSVladimir Kondratiev /** 3542be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3552be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3562be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3572be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3582be7d22fSVladimir Kondratiev */ 3592be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3602be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3618fe59627SVladimir Kondratiev 3622be7d22fSVladimir Kondratiev if (len > 8) { 3632be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3642be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3658fe59627SVladimir Kondratiev 3662be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3672be7d22fSVladimir Kondratiev phy_length = len - 8; 3682be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3692be7d22fSVladimir Kondratiev } 3702be7d22fSVladimir Kondratiev } 3712be7d22fSVladimir Kondratiev } 3722be7d22fSVladimir Kondratiev rtap_len += phy_length; 3732be7d22fSVladimir Kondratiev } 3742be7d22fSVladimir Kondratiev 3752be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3762be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3779165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3782be7d22fSVladimir Kondratiev return; 3792be7d22fSVladimir Kondratiev } 3802be7d22fSVladimir Kondratiev 381d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 3822be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3832be7d22fSVladimir Kondratiev 3842be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3852be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3862be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3872be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3882be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3892be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3902be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3912be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3922be7d22fSVladimir Kondratiev 3932be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3942be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3952be7d22fSVladimir Kondratiev 3962be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3972be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3982be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3992be7d22fSVladimir Kondratiev 4002be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 4012be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 4022be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 4032be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 4042be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 4052be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 4062be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4072be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4082be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4092be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4102be7d22fSVladimir Kondratiev phy_length); 4112be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4122be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4132be7d22fSVladimir Kondratiev phy_length); 4142be7d22fSVladimir Kondratiev } 4152be7d22fSVladimir Kondratiev } 4162be7d22fSVladimir Kondratiev 4177be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 418fe9ee51eSMaya Erez { 419fe9ee51eSMaya Erez struct vring_rx_desc *_d; 42010590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 421fe9ee51eSMaya Erez 42210590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 423fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 424fe9ee51eSMaya Erez return false; 425fe9ee51eSMaya Erez 426fe9ee51eSMaya Erez return true; 427fe9ee51eSMaya Erez } 428fe9ee51eSMaya Erez 4292be7d22fSVladimir Kondratiev /** 4302be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4312be7d22fSVladimir Kondratiev * 43233e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 43333e61169SVladimir Kondratiev * 4342be7d22fSVladimir Kondratiev * Safe to call from IRQ 4352be7d22fSVladimir Kondratiev */ 4362be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 43710590c6aSGidon Studinski struct wil_ring *vring) 4382be7d22fSVladimir Kondratiev { 4392be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4405bd60982SLior David struct wil6210_vif *vif; 4415bd60982SLior David struct net_device *ndev; 44268ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 44368ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4442be7d22fSVladimir Kondratiev struct sk_buff *skb; 4452be7d22fSVladimir Kondratiev dma_addr_t pa; 446c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 44752a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4487e594444SVladimir Kondratiev u16 dmalen; 4492be7d22fSVladimir Kondratiev u8 ftype; 4505bd60982SLior David int cid, mid; 4513b282bc6SVladimir Kondratiev int i; 452c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 453c8b78b5fSVladimir Kondratiev 45433e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 45533e61169SVladimir Kondratiev 4563b282bc6SVladimir Kondratiev again: 45710590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4582be7d22fSVladimir Kondratiev return NULL; 4592be7d22fSVladimir Kondratiev 4603b282bc6SVladimir Kondratiev i = (int)vring->swhead; 46110590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 46233c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4632be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4642be7d22fSVladimir Kondratiev return NULL; 4652be7d22fSVladimir Kondratiev } 4662be7d22fSVladimir Kondratiev 467148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 468148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 46910590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 470148416a9SVladimir Kondratiev if (!skb) { 471148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4723b282bc6SVladimir Kondratiev goto again; 473148416a9SVladimir Kondratiev } 47468ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 47568ada71eSVladimir Kondratiev *d = *_d; 47668ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 47768ada71eSVladimir Kondratiev 47868ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 47968ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 48068ada71eSVladimir Kondratiev 481148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 482148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 483a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 48468ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 48568ada71eSVladimir Kondratiev 4863b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4875bd60982SLior David mid = wil_rxdesc_mid(d); 4885bd60982SLior David vif = wil->vifs[mid]; 4895bd60982SLior David 4905bd60982SLior David if (unlikely(!vif)) { 4915bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4925bd60982SLior David mid); 4935bd60982SLior David kfree_skb(skb); 4945bd60982SLior David goto again; 4955bd60982SLior David } 4965bd60982SLior David ndev = vif_to_ndev(vif); 4973b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4983b282bc6SVladimir Kondratiev 49933c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 500e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5013b282bc6SVladimir Kondratiev stats->rx_large_frame++; 502110dea00SWei Yongjun kfree_skb(skb); 5033b282bc6SVladimir Kondratiev goto again; 504e270045bSVladimir Kondratiev } 5057e594444SVladimir Kondratiev skb_trim(skb, dmalen); 50633e61169SVladimir Kondratiev 5071cbbcb08SVladimir Kondratiev prefetch(skb->data); 5081cbbcb08SVladimir Kondratiev 509c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 510c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 511c0d37713SVladimir Kondratiev 512c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 513c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 514c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5152be7d22fSVladimir Kondratiev 5162be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5172be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 51833e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5192be7d22fSVladimir Kondratiev 5202be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5212be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5222be7d22fSVladimir Kondratiev return skb; 523a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5242be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5252be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5262be7d22fSVladimir Kondratiev */ 52768ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 52833c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 529a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 530a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 531a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 532a8313341SVladimir Kondratiev 533a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 534a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 535a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5363b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 537a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 538a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 539a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 540a8313341SVladimir Kondratiev mid, cid, tid, seq); 5415bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 542a8313341SVladimir Kondratiev } else { 543a8313341SVladimir Kondratiev /* print again all info. One can enable only this 544a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 545a8313341SVladimir Kondratiev */ 546a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 547a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 548a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 549a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 550a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 551a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 552a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 553a8313341SVladimir Kondratiev } 5542be7d22fSVladimir Kondratiev kfree_skb(skb); 5553b282bc6SVladimir Kondratiev goto again; 5562be7d22fSVladimir Kondratiev } 5572be7d22fSVladimir Kondratiev 558c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5592be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5603b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5612be7d22fSVladimir Kondratiev kfree_skb(skb); 5623b282bc6SVladimir Kondratiev goto again; 5632be7d22fSVladimir Kondratiev } 5642be7d22fSVladimir Kondratiev 565504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 566504937d4SKirshenbaum Erez * and in case of error drop the packet 567504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 568504937d4SKirshenbaum Erez */ 56933c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 570504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 57133c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 572504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5734a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5744a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5754a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5764a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5774a68ab10SVladimir Kondratiev */ 5780b853210SMaya Erez else 5790b853210SMaya Erez stats->rx_csum_err++; 580504937d4SKirshenbaum Erez } 581504937d4SKirshenbaum Erez 582c406ea7cSVladimir Kondratiev if (snaplen) { 583c406ea7cSVladimir Kondratiev /* Packet layout 584c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 585c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 586c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 587c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 588c406ea7cSVladimir Kondratiev */ 589c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 590c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 591c406ea7cSVladimir Kondratiev } 592c406ea7cSVladimir Kondratiev 5932be7d22fSVladimir Kondratiev return skb; 5942be7d22fSVladimir Kondratiev } 5952be7d22fSVladimir Kondratiev 5962be7d22fSVladimir Kondratiev /** 5972be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5982be7d22fSVladimir Kondratiev * buffers posted at @swtail 5995bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6005bd60982SLior David * allocate skbs with headroom according to main interface only. This 6015bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6025bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6035bd60982SLior David * and we will need to fix this code once we add support. 6042be7d22fSVladimir Kondratiev */ 6052be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6062be7d22fSVladimir Kondratiev { 607e00243faSLior David struct net_device *ndev = wil->main_ndev; 60810590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6092be7d22fSVladimir Kondratiev u32 next_tail; 6102be7d22fSVladimir Kondratiev int rc = 0; 6112be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6122be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6132be7d22fSVladimir Kondratiev 61410590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6152be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6162be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6172be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 61833c477fdSVladimir Kondratiev if (unlikely(rc)) { 6193d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6202be7d22fSVladimir Kondratiev rc, v->swtail); 6212be7d22fSVladimir Kondratiev break; 6222be7d22fSVladimir Kondratiev } 6232be7d22fSVladimir Kondratiev } 624ab6d7cc3SMaya Erez 625ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 626ab6d7cc3SMaya Erez * committing them to HW 627ab6d7cc3SMaya Erez */ 628ab6d7cc3SMaya Erez wmb(); 629ab6d7cc3SMaya Erez 630b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6312be7d22fSVladimir Kondratiev 6322be7d22fSVladimir Kondratiev return rc; 6332be7d22fSVladimir Kondratiev } 6342be7d22fSVladimir Kondratiev 63558527421SVladimir Kondratiev /** 63658527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 63758527421SVladimir Kondratiev * @cs: One area of memory 63858527421SVladimir Kondratiev * @ct: Another area of memory 63958527421SVladimir Kondratiev * @count: The size of the area. 64058527421SVladimir Kondratiev * 64158527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 64258527421SVladimir Kondratiev * with minimal modifications 64358527421SVladimir Kondratiev */ 6447be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 64558527421SVladimir Kondratiev { 64658527421SVladimir Kondratiev const unsigned char *su1, *su2; 64758527421SVladimir Kondratiev int res = 0; 64858527421SVladimir Kondratiev 64958527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 65058527421SVladimir Kondratiev --su1, --su2, count--) { 65158527421SVladimir Kondratiev res = *su1 - *su2; 65258527421SVladimir Kondratiev if (res) 65358527421SVladimir Kondratiev break; 65458527421SVladimir Kondratiev } 65558527421SVladimir Kondratiev return res; 65658527421SVladimir Kondratiev } 65758527421SVladimir Kondratiev 65858527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 65958527421SVladimir Kondratiev { 66058527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 66158527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 66258527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 66358527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 66458527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 66558527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 66658527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 66758527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 66858527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 66958527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 67058527421SVladimir Kondratiev 67158527421SVladimir Kondratiev if (!cc->key_set) { 67258527421SVladimir Kondratiev wil_err_ratelimited(wil, 67358527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 67458527421SVladimir Kondratiev cid, tid, mc, key_id); 67558527421SVladimir Kondratiev return -EINVAL; 67658527421SVladimir Kondratiev } 67758527421SVladimir Kondratiev 67858527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 67958527421SVladimir Kondratiev wil_err_ratelimited(wil, 68058527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 68158527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 68258527421SVladimir Kondratiev return -EINVAL; 68358527421SVladimir Kondratiev } 68458527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 68558527421SVladimir Kondratiev 68658527421SVladimir Kondratiev return 0; 68758527421SVladimir Kondratiev } 68858527421SVladimir Kondratiev 689e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 690e15af41cSDedy Lansky struct wil_net_stats *stats) 691e15af41cSDedy Lansky { 692e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 693e15af41cSDedy Lansky 694e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 695e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 696e15af41cSDedy Lansky stats->rx_mic_error++; 697e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 698e15af41cSDedy Lansky return -EFAULT; 699e15af41cSDedy Lansky } 700e15af41cSDedy Lansky 701e15af41cSDedy Lansky return 0; 702e15af41cSDedy Lansky } 703e15af41cSDedy Lansky 7047be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 7057be13fc3SGidon Studinski int *security) 7067be13fc3SGidon Studinski { 7077be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 7087be13fc3SGidon Studinski 7097be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 7107be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 7117be13fc3SGidon Studinski } 7127be13fc3SGidon Studinski 7132be7d22fSVladimir Kondratiev /* 7142be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 715e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 7162be7d22fSVladimir Kondratiev */ 717b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 7182be7d22fSVladimir Kondratiev { 719c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 720e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 721c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 722e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 7232be7d22fSVladimir Kondratiev unsigned int len = skb->len; 7247be13fc3SGidon Studinski int cid; 7257be13fc3SGidon Studinski int security; 726c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 727c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 728c42da999SVladimir Kondratiev * is not suitable, need to look at data 729c42da999SVladimir Kondratiev */ 730c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 7317be13fc3SGidon Studinski struct wil_net_stats *stats; 732c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 733c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 734c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 735c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 736c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 737c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 738c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 739c42da999SVladimir Kondratiev }; 7402be7d22fSVladimir Kondratiev 7417be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 7427be13fc3SGidon Studinski 7437be13fc3SGidon Studinski stats = &wil->sta[cid].stats; 7447be13fc3SGidon Studinski 7450553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7460553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7470553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7480553640dSVladimir Shulman * mechanism, core will be chosen according 7490553640dSVladimir Shulman * to user-level rps configuration. 7500553640dSVladimir Shulman */ 7510553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7520553640dSVladimir Shulman 753241804cbSVladimir Kondratiev skb_orphan(skb); 754241804cbSVladimir Kondratiev 7557be13fc3SGidon Studinski if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 75658527421SVladimir Kondratiev rc = GRO_DROP; 75758527421SVladimir Kondratiev dev_kfree_skb(skb); 75858527421SVladimir Kondratiev stats->rx_replay++; 75958527421SVladimir Kondratiev goto stats; 76058527421SVladimir Kondratiev } 76158527421SVladimir Kondratiev 762e15af41cSDedy Lansky /* check errors reported by HW and update statistics */ 763e15af41cSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 764e15af41cSDedy Lansky dev_kfree_skb(skb); 765e15af41cSDedy Lansky return; 766e15af41cSDedy Lansky } 767e15af41cSDedy Lansky 7689a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 7699a65064aSDedy Lansky if (mcast && ether_addr_equal(eth->h_source, ndev->dev_addr)) { 7709a65064aSDedy Lansky /* mcast packet looped back to us */ 7719a65064aSDedy Lansky rc = GRO_DROP; 7729a65064aSDedy Lansky dev_kfree_skb(skb); 7739a65064aSDedy Lansky goto stats; 7749a65064aSDedy Lansky } 7759a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 776c42da999SVladimir Kondratiev if (mcast) { 777c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 778c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 779c42da999SVladimir Kondratiev */ 780c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 781c42da999SVladimir Kondratiev } else { 782e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 783e00243faSLior David eth->h_dest); 7842be7d22fSVladimir Kondratiev 785c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 786c42da999SVladimir Kondratiev /* The destination station is associated to 787c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 788c42da999SVladimir Kondratiev * directly to it and do not pass it to local 789c42da999SVladimir Kondratiev * net stack. 790c42da999SVladimir Kondratiev */ 791c42da999SVladimir Kondratiev xmit_skb = skb; 792c42da999SVladimir Kondratiev skb = NULL; 793c42da999SVladimir Kondratiev } 794c42da999SVladimir Kondratiev } 795c42da999SVladimir Kondratiev } 796c42da999SVladimir Kondratiev if (xmit_skb) { 797c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 798c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 799c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 800c42da999SVladimir Kondratiev */ 801c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 802c42da999SVladimir Kondratiev xmit_skb->priority += 256; 803c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 804c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 805c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 806c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 807c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 808c42da999SVladimir Kondratiev } 809c42da999SVladimir Kondratiev 810c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 811c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 8125bd60982SLior David skb->dev = ndev; 813c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 814c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 815c42da999SVladimir Kondratiev len, gro_res_str[rc]); 816c42da999SVladimir Kondratiev } 81758527421SVladimir Kondratiev stats: 818c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 819b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 820b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 821b5998e6aSVladimir Kondratiev stats->rx_dropped++; 822b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 823b5998e6aSVladimir Kondratiev } else { 8242be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 825c8b78b5fSVladimir Kondratiev stats->rx_packets++; 8262be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 827c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 828c42da999SVladimir Kondratiev if (mcast) 829c42da999SVladimir Kondratiev ndev->stats.multicast++; 830194b482bSVladimir Kondratiev } 8312be7d22fSVladimir Kondratiev } 8322be7d22fSVladimir Kondratiev 8332be7d22fSVladimir Kondratiev /** 8342be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 8352be7d22fSVladimir Kondratiev * 836e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8372be7d22fSVladimir Kondratiev */ 838e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8392be7d22fSVladimir Kondratiev { 840e00243faSLior David struct net_device *ndev = wil->main_ndev; 841e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 84210590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 8432be7d22fSVladimir Kondratiev struct sk_buff *skb; 8442be7d22fSVladimir Kondratiev 84533c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8462be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8472be7d22fSVladimir Kondratiev return; 8482be7d22fSVladimir Kondratiev } 849af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 850e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 851e0287c4aSVladimir Kondratiev (*quota)--; 8522be7d22fSVladimir Kondratiev 853e00243faSLior David /* monitor is currently supported on main interface only */ 854e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8552be7d22fSVladimir Kondratiev skb->dev = ndev; 8562be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8572be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8582be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8592be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 860b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8612be7d22fSVladimir Kondratiev } else { 862b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8632be7d22fSVladimir Kondratiev } 8642be7d22fSVladimir Kondratiev } 8652be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8662be7d22fSVladimir Kondratiev } 8672be7d22fSVladimir Kondratiev 86852a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 86952a45702SLior David { 87052a45702SLior David wil->rx_buf_len = rx_large_buf ? 87152a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 87252a45702SLior David if (mtu_max > wil->rx_buf_len) { 87352a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 87452a45702SLior David * backward compatibility (mtu_max parameter was also used 87552a45702SLior David * to support receiving large packets) 87652a45702SLior David */ 87752a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 87852a45702SLior David wil->rx_buf_len = mtu_max; 87952a45702SLior David } 88052a45702SLior David } 88152a45702SLior David 88296c93589SGidon Studinski static int wil_rx_init(struct wil6210_priv *wil, u16 size) 8832be7d22fSVladimir Kondratiev { 88410590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8852be7d22fSVladimir Kondratiev int rc; 8862be7d22fSVladimir Kondratiev 887af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8889cf10d62SVladimir Kondratiev 8898bf6adb9SVladimir Kondratiev if (vring->va) { 8908bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8918bf6adb9SVladimir Kondratiev return -EINVAL; 8928bf6adb9SVladimir Kondratiev } 8938bf6adb9SVladimir Kondratiev 89452a45702SLior David wil_rx_buf_len_init(wil); 89552a45702SLior David 896d3762b40SVladimir Kondratiev vring->size = size; 89796c93589SGidon Studinski vring->is_rx = true; 8982be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8992be7d22fSVladimir Kondratiev if (rc) 9002be7d22fSVladimir Kondratiev return rc; 9012be7d22fSVladimir Kondratiev 90247e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 9032be7d22fSVladimir Kondratiev if (rc) 9042be7d22fSVladimir Kondratiev goto err_free; 9052be7d22fSVladimir Kondratiev 9062be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 9072be7d22fSVladimir Kondratiev if (rc) 9082be7d22fSVladimir Kondratiev goto err_free; 9092be7d22fSVladimir Kondratiev 9102be7d22fSVladimir Kondratiev return 0; 9112be7d22fSVladimir Kondratiev err_free: 91296c93589SGidon Studinski wil_vring_free(wil, vring); 9132be7d22fSVladimir Kondratiev 9142be7d22fSVladimir Kondratiev return rc; 9152be7d22fSVladimir Kondratiev } 9162be7d22fSVladimir Kondratiev 91796c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 9182be7d22fSVladimir Kondratiev { 91910590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 9202be7d22fSVladimir Kondratiev 921af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 9229cf10d62SVladimir Kondratiev 9232acb4220SVladimir Kondratiev if (vring->va) 92496c93589SGidon Studinski wil_vring_free(wil, vring); 9252be7d22fSVladimir Kondratiev } 9262be7d22fSVladimir Kondratiev 9279202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 9289202d7b6SMaya Erez u32 len, int vring_index) 9299202d7b6SMaya Erez { 9309202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 9319202d7b6SMaya Erez 9329202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 9339202d7b6SMaya Erez d->dma.ip_length = 0; 9349202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 9359202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 9369202d7b6SMaya Erez d->dma.error = 0; 9379202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 9389202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 9399202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 9409202d7b6SMaya Erez d->mac.d[0] = 0; 9419202d7b6SMaya Erez d->mac.d[1] = 0; 9429202d7b6SMaya Erez d->mac.d[2] = 0; 9439202d7b6SMaya Erez d->mac.ucode_cmd = 0; 9449202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 9459202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 9469202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 9479202d7b6SMaya Erez 9489202d7b6SMaya Erez return 0; 9499202d7b6SMaya Erez } 9509202d7b6SMaya Erez 95196c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 952875e9439SMaya Erez { 953875e9439SMaya Erez spin_lock_bh(&txdata->lock); 954875e9439SMaya Erez txdata->dot1x_open = 0; 955875e9439SMaya Erez txdata->enabled = 0; 956875e9439SMaya Erez txdata->idle = 0; 957875e9439SMaya Erez txdata->last_idle = 0; 958875e9439SMaya Erez txdata->begin = 0; 959875e9439SMaya Erez txdata->agg_wsize = 0; 960875e9439SMaya Erez txdata->agg_timeout = 0; 961875e9439SMaya Erez txdata->agg_amsdu = 0; 962875e9439SMaya Erez txdata->addba_in_progress = false; 963e00243faSLior David txdata->mid = U8_MAX; 964875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 965875e9439SMaya Erez } 966875e9439SMaya Erez 96796c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9682be7d22fSVladimir Kondratiev int cid, int tid) 9692be7d22fSVladimir Kondratiev { 970e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9712be7d22fSVladimir Kondratiev int rc; 9722be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9732be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9742be7d22fSVladimir Kondratiev .vring_cfg = { 9752be7d22fSVladimir Kondratiev .tx_sw_ring = { 9769a06bec9SVladimir Kondratiev .max_mpdu_size = 977c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 978b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9792be7d22fSVladimir Kondratiev }, 9802be7d22fSVladimir Kondratiev .ringid = id, 981a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9822be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9832be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9842be7d22fSVladimir Kondratiev .to_resolution = 0, 9853277213fSVladimir Kondratiev .agg_max_wsize = 0, 9862be7d22fSVladimir Kondratiev .schd_params = { 9872be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9882be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9892be7d22fSVladimir Kondratiev }, 9902be7d22fSVladimir Kondratiev }, 9912be7d22fSVladimir Kondratiev }; 9922be7d22fSVladimir Kondratiev struct { 993b874ddecSLior David struct wmi_cmd_hdr wmi; 9942be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 995807b0860SAlexei Avshalom Lazar } __packed reply = { 996807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 997807b0860SAlexei Avshalom Lazar }; 99810590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 99910590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 10002be7d22fSVladimir Kondratiev 1001af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 1002e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10039b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 10049cf10d62SVladimir Kondratiev 10052be7d22fSVladimir Kondratiev if (vring->va) { 10062be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 10072be7d22fSVladimir Kondratiev rc = -EINVAL; 10082be7d22fSVladimir Kondratiev goto out; 10092be7d22fSVladimir Kondratiev } 10102be7d22fSVladimir Kondratiev 1011875e9439SMaya Erez wil_tx_data_init(txdata); 101296c93589SGidon Studinski vring->is_rx = false; 10132be7d22fSVladimir Kondratiev vring->size = size; 10142be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 10152be7d22fSVladimir Kondratiev if (rc) 10162be7d22fSVladimir Kondratiev goto out; 10172be7d22fSVladimir Kondratiev 101810590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 101910590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 102093ae6d49SVladimir Kondratiev 10212be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 10222be7d22fSVladimir Kondratiev 1023e00243faSLior David if (!vif->privacy) 1024230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1025e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 10262be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 10272be7d22fSVladimir Kondratiev if (rc) 10282be7d22fSVladimir Kondratiev goto out_free; 10292be7d22fSVladimir Kondratiev 1030b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 10312be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 10322be7d22fSVladimir Kondratiev reply.cmd.status); 1033c331997bSVladimir Kondratiev rc = -EINVAL; 10342be7d22fSVladimir Kondratiev goto out_free; 10352be7d22fSVladimir Kondratiev } 10362be7d22fSVladimir Kondratiev 1037dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1038dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1039e00243faSLior David txdata->mid = vif->mid; 1040097638a0SVladimir Kondratiev txdata->enabled = 1; 1041dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1042dc90506fSMaya Erez 1043230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 10443a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1045097638a0SVladimir Kondratiev 10462be7d22fSVladimir Kondratiev return 0; 10472be7d22fSVladimir Kondratiev out_free: 1048875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1049230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1050230d8442SVladimir Kondratiev txdata->enabled = 0; 1051875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 105296c93589SGidon Studinski wil_vring_free(wil, vring); 105310590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 105410590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 10550916d9f2SMaya Erez 10562be7d22fSVladimir Kondratiev out: 10572be7d22fSVladimir Kondratiev 10582be7d22fSVladimir Kondratiev return rc; 10592be7d22fSVladimir Kondratiev } 10602be7d22fSVladimir Kondratiev 1061e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 106241d6b093SVladimir Kondratiev { 1063e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 106441d6b093SVladimir Kondratiev int rc; 106541d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 106641d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 106741d6b093SVladimir Kondratiev .vring_cfg = { 106841d6b093SVladimir Kondratiev .tx_sw_ring = { 106941d6b093SVladimir Kondratiev .max_mpdu_size = 107041d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 107141d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 107241d6b093SVladimir Kondratiev }, 107341d6b093SVladimir Kondratiev .ringid = id, 107441d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 107541d6b093SVladimir Kondratiev }, 107641d6b093SVladimir Kondratiev }; 107741d6b093SVladimir Kondratiev struct { 1078b874ddecSLior David struct wmi_cmd_hdr wmi; 107941d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1080807b0860SAlexei Avshalom Lazar } __packed reply = { 1081807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1082807b0860SAlexei Avshalom Lazar }; 108310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 108410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 108541d6b093SVladimir Kondratiev 1086af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 108741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10889b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 108941d6b093SVladimir Kondratiev 109041d6b093SVladimir Kondratiev if (vring->va) { 109141d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 109241d6b093SVladimir Kondratiev rc = -EINVAL; 109341d6b093SVladimir Kondratiev goto out; 109441d6b093SVladimir Kondratiev } 109541d6b093SVladimir Kondratiev 1096875e9439SMaya Erez wil_tx_data_init(txdata); 109796c93589SGidon Studinski vring->is_rx = false; 109841d6b093SVladimir Kondratiev vring->size = size; 109941d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 110041d6b093SVladimir Kondratiev if (rc) 110141d6b093SVladimir Kondratiev goto out; 110241d6b093SVladimir Kondratiev 110310590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 110410590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 110541d6b093SVladimir Kondratiev 110641d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 110741d6b093SVladimir Kondratiev 1108e00243faSLior David if (!vif->privacy) 1109230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1110e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1111e00243faSLior David &cmd, sizeof(cmd), 111241d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 111341d6b093SVladimir Kondratiev if (rc) 111441d6b093SVladimir Kondratiev goto out_free; 111541d6b093SVladimir Kondratiev 111641d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 111741d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 111841d6b093SVladimir Kondratiev reply.cmd.status); 111941d6b093SVladimir Kondratiev rc = -EINVAL; 112041d6b093SVladimir Kondratiev goto out_free; 112141d6b093SVladimir Kondratiev } 112241d6b093SVladimir Kondratiev 1123dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1124dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1125e00243faSLior David txdata->mid = vif->mid; 112641d6b093SVladimir Kondratiev txdata->enabled = 1; 1127dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 112841d6b093SVladimir Kondratiev 112941d6b093SVladimir Kondratiev return 0; 113041d6b093SVladimir Kondratiev out_free: 1131875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1132230d8442SVladimir Kondratiev txdata->enabled = 0; 1133230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1134875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 113596c93589SGidon Studinski wil_vring_free(wil, vring); 113641d6b093SVladimir Kondratiev out: 113741d6b093SVladimir Kondratiev 113841d6b093SVladimir Kondratiev return rc; 113941d6b093SVladimir Kondratiev } 114041d6b093SVladimir Kondratiev 114110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1142e00243faSLior David struct wil6210_vif *vif, 11432be7d22fSVladimir Kondratiev struct sk_buff *skb) 11442be7d22fSVladimir Kondratiev { 11453df2cd36SVladimir Kondratiev int i; 11463df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1147e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 114896c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 11492be7d22fSVladimir Kondratiev 11503df2cd36SVladimir Kondratiev if (cid < 0) 11513df2cd36SVladimir Kondratiev return NULL; 11523df2cd36SVladimir Kondratiev 11533df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 115496c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 115510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 115610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1157230d8442SVladimir Kondratiev continue; 115810590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 115910590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 116010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11618fe59627SVladimir Kondratiev 1162af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1163af3db60aSLazar Alexei eth->h_dest, i); 1164b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11652be7d22fSVladimir Kondratiev return v; 11663df2cd36SVladimir Kondratiev } else { 1167af3db60aSLazar Alexei wil_dbg_txrx(wil, 1168af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1169af3db60aSLazar Alexei i); 11703df2cd36SVladimir Kondratiev return NULL; 11713df2cd36SVladimir Kondratiev } 11723df2cd36SVladimir Kondratiev } 11733df2cd36SVladimir Kondratiev } 11742be7d22fSVladimir Kondratiev 11752be7d22fSVladimir Kondratiev return NULL; 11762be7d22fSVladimir Kondratiev } 11772be7d22fSVladimir Kondratiev 11789202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 11799202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 118054ed90a8SVladimir Kondratiev 118110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1182e00243faSLior David struct wil6210_vif *vif, 118354ed90a8SVladimir Kondratiev struct sk_buff *skb) 118454ed90a8SVladimir Kondratiev { 118510590c6aSGidon Studinski struct wil_ring *ring; 118654ed90a8SVladimir Kondratiev int i; 118754ed90a8SVladimir Kondratiev u8 cid; 118810590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 118996c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 119054ed90a8SVladimir Kondratiev 119154ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 119254ed90a8SVladimir Kondratiev * for the AP we connected to. 1193230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 119454ed90a8SVladimir Kondratiev */ 119596c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 119610590c6aSGidon Studinski ring = &wil->ring_tx[i]; 119710590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 119810590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 119954ed90a8SVladimir Kondratiev continue; 120054ed90a8SVladimir Kondratiev 120110590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 120241d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 120341d6b093SVladimir Kondratiev continue; 120441d6b093SVladimir Kondratiev 120510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 120610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1207230d8442SVladimir Kondratiev continue; 120854ed90a8SVladimir Kondratiev 120954ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 121054ed90a8SVladimir Kondratiev 121110590c6aSGidon Studinski return ring; 121254ed90a8SVladimir Kondratiev } 121354ed90a8SVladimir Kondratiev 121410590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 121554ed90a8SVladimir Kondratiev 121654ed90a8SVladimir Kondratiev return NULL; 121754ed90a8SVladimir Kondratiev } 121854ed90a8SVladimir Kondratiev 121970812421SVladimir Kondratiev /* Use one of 2 strategies: 122070812421SVladimir Kondratiev * 122170812421SVladimir Kondratiev * 1. New (real broadcast): 122270812421SVladimir Kondratiev * use dedicated broadcast vring 122370812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 122470812421SVladimir Kondratiev * Find 1-st vring and return it; 122570812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 122670812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 122770812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 122870812421SVladimir Kondratiev * - for PBSS 122970812421SVladimir Kondratiev */ 123010590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1231e00243faSLior David struct wil6210_vif *vif, 1232fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1233fb3cac57SVladimir Kondratiev { 123410590c6aSGidon Studinski struct wil_ring *v; 123510590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 123610590c6aSGidon Studinski int i = vif->bcast_ring; 1237fb3cac57SVladimir Kondratiev 123841d6b093SVladimir Kondratiev if (i < 0) 123941d6b093SVladimir Kondratiev return NULL; 124010590c6aSGidon Studinski v = &wil->ring_tx[i]; 124110590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1242b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1243fb3cac57SVladimir Kondratiev return NULL; 124410590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 124510590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1246230d8442SVladimir Kondratiev return NULL; 1247fb3cac57SVladimir Kondratiev 1248fb3cac57SVladimir Kondratiev return v; 1249fb3cac57SVladimir Kondratiev } 1250fb3cac57SVladimir Kondratiev 125170812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 125270812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 125370812421SVladimir Kondratiev { 125470812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 125510590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 125670812421SVladimir Kondratiev 125770812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 125870812421SVladimir Kondratiev } 125970812421SVladimir Kondratiev 126010590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1261e00243faSLior David struct wil6210_vif *vif, 126270812421SVladimir Kondratiev struct sk_buff *skb) 126370812421SVladimir Kondratiev { 126410590c6aSGidon Studinski struct wil_ring *v, *v2; 126570812421SVladimir Kondratiev struct sk_buff *skb2; 126670812421SVladimir Kondratiev int i; 126770812421SVladimir Kondratiev u8 cid; 126870812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 126970812421SVladimir Kondratiev char *src = eth->h_source; 127010590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 127196c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 127270812421SVladimir Kondratiev 127370812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 127496c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 127510590c6aSGidon Studinski v = &wil->ring_tx[i]; 127610590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1277e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 127870812421SVladimir Kondratiev continue; 127970812421SVladimir Kondratiev 128010590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 128170812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 128270812421SVladimir Kondratiev continue; 128310590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 128410590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 128570812421SVladimir Kondratiev continue; 128670812421SVladimir Kondratiev 128770812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 128870812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 128970812421SVladimir Kondratiev continue; 129070812421SVladimir Kondratiev 129170812421SVladimir Kondratiev goto found; 129270812421SVladimir Kondratiev } 129370812421SVladimir Kondratiev 129470812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 129570812421SVladimir Kondratiev 129670812421SVladimir Kondratiev return NULL; 129770812421SVladimir Kondratiev 129870812421SVladimir Kondratiev found: 129970812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 130070812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 130170812421SVladimir Kondratiev 130270812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 130370812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 130410590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 130510590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1306e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 130770812421SVladimir Kondratiev continue; 130810590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 130970812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 131070812421SVladimir Kondratiev continue; 131110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 131210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 131370812421SVladimir Kondratiev continue; 131470812421SVladimir Kondratiev 131570812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 131670812421SVladimir Kondratiev continue; 131770812421SVladimir Kondratiev 131870812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 131970812421SVladimir Kondratiev if (skb2) { 132070812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 132170812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 13229202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 132370812421SVladimir Kondratiev } else { 132470812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 132570812421SVladimir Kondratiev } 132670812421SVladimir Kondratiev } 132770812421SVladimir Kondratiev 132870812421SVladimir Kondratiev return v; 132970812421SVladimir Kondratiev } 133070812421SVladimir Kondratiev 1331c236658fSVladimir Kondratiev static inline 1332c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1333c236658fSVladimir Kondratiev { 13343d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1335c236658fSVladimir Kondratiev } 1336c236658fSVladimir Kondratiev 13373d4bde15SVladimir Kondratiev /** 13383d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13393d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13403d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13413d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13423d4bde15SVladimir Kondratiev */ 13433d4bde15SVladimir Kondratiev 13443d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13453d4bde15SVladimir Kondratiev struct sk_buff *skb, 13463d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13473d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1348504937d4SKirshenbaum Erez { 13493d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13503d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13513d4bde15SVladimir Kondratiev 13523d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13533d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13543d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13553d4bde15SVladimir Kondratiev 13563d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13573d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13583d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13593d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13603d4bde15SVladimir Kondratiev 13613d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13623d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13633d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13643d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13653d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13663d4bde15SVladimir Kondratiev } 13673d4bde15SVladimir Kondratiev 13683d4bde15SVladimir Kondratiev /** 13693d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13703d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13713d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13723d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13733d4bde15SVladimir Kondratiev * 13743d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13753d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13763d4bde15SVladimir Kondratiev */ 13773d4bde15SVladimir Kondratiev 13783d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13793d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1380504937d4SKirshenbaum Erez int protocol; 1381504937d4SKirshenbaum Erez 1382504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1383504937d4SKirshenbaum Erez return 0; 1384504937d4SKirshenbaum Erez 1385df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1386df2d08eeSVladimir Kondratiev 1387504937d4SKirshenbaum Erez switch (skb->protocol) { 1388504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1389504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1390df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1391504937d4SKirshenbaum Erez break; 1392504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1393504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1394504937d4SKirshenbaum Erez break; 1395504937d4SKirshenbaum Erez default: 1396504937d4SKirshenbaum Erez return -EINVAL; 1397504937d4SKirshenbaum Erez } 1398504937d4SKirshenbaum Erez 1399504937d4SKirshenbaum Erez switch (protocol) { 1400504937d4SKirshenbaum Erez case IPPROTO_TCP: 1401504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1402504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1403504937d4SKirshenbaum Erez d->dma.d0 |= 1404504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1405504937d4SKirshenbaum Erez break; 1406504937d4SKirshenbaum Erez case IPPROTO_UDP: 1407504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1408504937d4SKirshenbaum Erez d->dma.d0 |= 1409504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1410504937d4SKirshenbaum Erez break; 1411504937d4SKirshenbaum Erez default: 1412504937d4SKirshenbaum Erez return -EINVAL; 1413504937d4SKirshenbaum Erez } 1414504937d4SKirshenbaum Erez 1415504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1416504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1417504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1418504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1419504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1420504937d4SKirshenbaum Erez 1421504937d4SKirshenbaum Erez return 0; 1422504937d4SKirshenbaum Erez } 1423504937d4SKirshenbaum Erez 14243d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14253d4bde15SVladimir Kondratiev { 14263d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14273d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14283d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14293d4bde15SVladimir Kondratiev } 14303d4bde15SVladimir Kondratiev 14313d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14323d4bde15SVladimir Kondratiev { 14333d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14343d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14353d4bde15SVladimir Kondratiev } 14363d4bde15SVladimir Kondratiev 1437e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 143810590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 14393d4bde15SVladimir Kondratiev { 14403d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14413d4bde15SVladimir Kondratiev 14423d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14433d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14443d4bde15SVladimir Kondratiev *_first_desc = NULL; 14453d4bde15SVladimir Kondratiev 14463d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14473d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14483d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14493d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14503d4bde15SVladimir Kondratiev 14513d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14523d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14533d4bde15SVladimir Kondratiev 14543d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14553d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14563d4bde15SVladimir Kondratiev 14573d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 145810590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14593d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14603d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14613d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14623d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 146310590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 146410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14653d4bde15SVladimir Kondratiev uint i = swhead; 14663d4bde15SVladimir Kondratiev dma_addr_t pa; 14673d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14683d4bde15SVladimir Kondratiev int rem_data = mss; 14693d4bde15SVladimir Kondratiev int lenmss; 14703d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14713d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14723d4bde15SVladimir Kondratiev bool is_ipv4; 14733d4bde15SVladimir Kondratiev int tcp_hdr_len; 14743d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14753d4bde15SVladimir Kondratiev int gso_type; 1476e3d2ed94SHamad Kadmany int rc = -EINVAL; 14773d4bde15SVladimir Kondratiev 1478af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1479af3db60aSLazar Alexei vring_index); 14803d4bde15SVladimir Kondratiev 14813d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14823d4bde15SVladimir Kondratiev return -EINVAL; 14833d4bde15SVladimir Kondratiev 14843d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14853d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14863d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14873d4bde15SVladimir Kondratiev * this is the initial check only. 14883d4bde15SVladimir Kondratiev */ 14893d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14903d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14913d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14923d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14933d4bde15SVladimir Kondratiev return -ENOMEM; 14943d4bde15SVladimir Kondratiev } 14953d4bde15SVladimir Kondratiev 14963d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14973d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14983d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14993d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 15003d4bde15SVladimir Kondratiev 15013d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 15023d4bde15SVladimir Kondratiev switch (gso_type) { 15033d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 15043d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 15053d4bde15SVladimir Kondratiev * as required by the offloading doc 15063d4bde15SVladimir Kondratiev */ 15073d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 15083d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 15093d4bde15SVladimir Kondratiev is_ipv4 = true; 15103d4bde15SVladimir Kondratiev break; 15113d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 15123d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15133d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15143d4bde15SVladimir Kondratiev is_ipv4 = false; 15153d4bde15SVladimir Kondratiev break; 15163d4bde15SVladimir Kondratiev default: 15173d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15183d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15193d4bde15SVladimir Kondratiev */ 15203d4bde15SVladimir Kondratiev return -EINVAL; 15213d4bde15SVladimir Kondratiev } 15223d4bde15SVladimir Kondratiev 15233d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15243d4bde15SVladimir Kondratiev return -EINVAL; 15253d4bde15SVladimir Kondratiev 15263d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15273d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15283d4bde15SVladimir Kondratiev */ 15293d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15303d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15313d4bde15SVladimir Kondratiev 153210590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 15333d4bde15SVladimir Kondratiev 15343d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15353d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15363d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15373d4bde15SVladimir Kondratiev goto err_exit; 15383d4bde15SVladimir Kondratiev } 15393d4bde15SVladimir Kondratiev 15409202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 15419202d7b6SMaya Erez hdrlen, vring_index); 15423d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15433d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15443d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15453d4bde15SVladimir Kondratiev 15463d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15473d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15483d4bde15SVladimir Kondratiev 15493d4bde15SVladimir Kondratiev descs_used++; 15503d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15513d4bde15SVladimir Kondratiev 15523d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15533d4bde15SVladimir Kondratiev if (headlen) { 15543d4bde15SVladimir Kondratiev len = headlen; 15553d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15563d4bde15SVladimir Kondratiev len); 15573d4bde15SVladimir Kondratiev } else { 15583d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15593d4bde15SVladimir Kondratiev len = frag->size; 15603d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15613d4bde15SVladimir Kondratiev } 15623d4bde15SVladimir Kondratiev 15633d4bde15SVladimir Kondratiev while (len) { 15643d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15653d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15663d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15673d4bde15SVladimir Kondratiev 15683d4bde15SVladimir Kondratiev if (descs_used == avail) { 1569e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1570e3d2ed94SHamad Kadmany rc = -ENOMEM; 1571e3d2ed94SHamad Kadmany goto mem_error; 15723d4bde15SVladimir Kondratiev } 15733d4bde15SVladimir Kondratiev 15743d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15753d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15763d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15773d4bde15SVladimir Kondratiev 15783d4bde15SVladimir Kondratiev if (!headlen) { 15793d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15803d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15813d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15823d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15833d4bde15SVladimir Kondratiev } else { 15843d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15853d4bde15SVladimir Kondratiev skb->data + 15863d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15873d4bde15SVladimir Kondratiev lenmss, 15883d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15893d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15903d4bde15SVladimir Kondratiev headlen -= lenmss; 15913d4bde15SVladimir Kondratiev } 15923d4bde15SVladimir Kondratiev 1593e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1594e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1595e3d2ed94SHamad Kadmany goto mem_error; 1596e3d2ed94SHamad Kadmany } 15973d4bde15SVladimir Kondratiev 159810590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 15993d4bde15SVladimir Kondratiev 16003d4bde15SVladimir Kondratiev if (!_first_desc) { 16013d4bde15SVladimir Kondratiev _first_desc = _desc; 16023d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 16033d4bde15SVladimir Kondratiev d = first_desc; 16043d4bde15SVladimir Kondratiev } else { 16053d4bde15SVladimir Kondratiev d = &desc_mem; 16063d4bde15SVladimir Kondratiev } 16073d4bde15SVladimir Kondratiev 16089202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 16099202d7b6SMaya Erez pa, lenmss, vring_index); 16103d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 16113d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 16123d4bde15SVladimir Kondratiev skb_net_hdr_len); 16133d4bde15SVladimir Kondratiev 16143d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16153d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16163d4bde15SVladimir Kondratiev 16173d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16183d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16193d4bde15SVladimir Kondratiev len -= lenmss; 16203d4bde15SVladimir Kondratiev rem_data -= lenmss; 16213d4bde15SVladimir Kondratiev 16223d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16233d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16243d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16253d4bde15SVladimir Kondratiev 16263d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16273d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16283d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16293d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16303d4bde15SVladimir Kondratiev * release 16313d4bde15SVladimir Kondratiev */ 16323d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16333d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16343d4bde15SVladimir Kondratiev sg_desc_cnt + 16353d4bde15SVladimir Kondratiev 1); 16363d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16373d4bde15SVladimir Kondratiev } else { 16383d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16393d4bde15SVladimir Kondratiev sg_desc_cnt); 16403d4bde15SVladimir Kondratiev } 16413d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16423d4bde15SVladimir Kondratiev 16433d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16443d4bde15SVladimir Kondratiev 16453d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16463d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16473d4bde15SVladimir Kondratiev * it twice 16483d4bde15SVladimir Kondratiev */ 16493d4bde15SVladimir Kondratiev if (first_desc != d) 16503d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16513d4bde15SVladimir Kondratiev 16523d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16533d4bde15SVladimir Kondratiev * of this TS processing 16543d4bde15SVladimir Kondratiev */ 16553d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16563d4bde15SVladimir Kondratiev *_desc = *d; 16573d4bde15SVladimir Kondratiev 16583d4bde15SVladimir Kondratiev rem_data = mss; 16593d4bde15SVladimir Kondratiev _first_desc = NULL; 16603d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16613d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16623d4bde15SVladimir Kondratiev *_desc = *d; 16633d4bde15SVladimir Kondratiev } 16643d4bde15SVladimir Kondratiev } 16653d4bde15SVladimir Kondratiev 16663d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16673d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16683d4bde15SVladimir Kondratiev */ 16693d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16703d4bde15SVladimir Kondratiev d = first_desc; 16713d4bde15SVladimir Kondratiev 16723d4bde15SVladimir Kondratiev /* Last data descriptor */ 16733d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16743d4bde15SVladimir Kondratiev *_desc = *d; 16753d4bde15SVladimir Kondratiev 16763d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16773d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16783d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16793d4bde15SVladimir Kondratiev 16803d4bde15SVladimir Kondratiev /* hold reference to skb 16813d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16823d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16833d4bde15SVladimir Kondratiev */ 16843d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16853d4bde15SVladimir Kondratiev 16863d4bde15SVladimir Kondratiev /* performance monitoring */ 168710590c6aSGidon Studinski used = wil_ring_used_tx(vring); 168810590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 16893d4bde15SVladimir Kondratiev used, used + descs_used)) { 16903d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16913d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16923d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16933d4bde15SVladimir Kondratiev } 16943d4bde15SVladimir Kondratiev 1695eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1696eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1697eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1698eb26cff1SMaya Erez * skb before it was completed. 1699eb26cff1SMaya Erez */ 1700eb26cff1SMaya Erez wmb(); 1701eb26cff1SMaya Erez 17023d4bde15SVladimir Kondratiev /* advance swhead */ 170310590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1704e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 17053d4bde15SVladimir Kondratiev 17063d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17073d4bde15SVladimir Kondratiev * committing them to HW 17083d4bde15SVladimir Kondratiev */ 17093d4bde15SVladimir Kondratiev wmb(); 17103d4bde15SVladimir Kondratiev 1711a24a3d6aSDedy Lansky if (wil->tx_latency) 1712a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1713a24a3d6aSDedy Lansky else 1714a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1715a24a3d6aSDedy Lansky 1716b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17173d4bde15SVladimir Kondratiev return 0; 17183d4bde15SVladimir Kondratiev 1719e3d2ed94SHamad Kadmany mem_error: 17203d4bde15SVladimir Kondratiev while (descs_used > 0) { 17213d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17223d4bde15SVladimir Kondratiev 1723a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 172410590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 172510590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 17263d4bde15SVladimir Kondratiev *d = *_desc; 17273d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17283d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17299202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 17303d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17313d4bde15SVladimir Kondratiev descs_used--; 17323d4bde15SVladimir Kondratiev } 17333d4bde15SVladimir Kondratiev err_exit: 1734e3d2ed94SHamad Kadmany return rc; 17353d4bde15SVladimir Kondratiev } 17363d4bde15SVladimir Kondratiev 17379202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 17389202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 17392be7d22fSVladimir Kondratiev { 17402be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 174168ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 174268ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17439202d7b6SMaya Erez u32 swhead = ring->swhead; 17449202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 17452be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1746504937d4SKirshenbaum Erez uint f = 0; 17479202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 17489202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 17492be7d22fSVladimir Kondratiev uint i = swhead; 17502be7d22fSVladimir Kondratiev dma_addr_t pa; 17510436fd9aSVladimir Shulman int used; 17529202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 175341d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17542be7d22fSVladimir Kondratiev 175510590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 17569202d7b6SMaya Erez skb->len, ring_index, nr_frags); 17572be7d22fSVladimir Kondratiev 17585933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17595933a06dSVladimir Kondratiev return -EINVAL; 17605933a06dSVladimir Kondratiev 176133c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 176270801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17635b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17649202d7b6SMaya Erez ring_index, 1 + nr_frags); 17652be7d22fSVladimir Kondratiev return -ENOMEM; 17662be7d22fSVladimir Kondratiev } 17679202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17682be7d22fSVladimir Kondratiev 17698fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17702be7d22fSVladimir Kondratiev 17719202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 17725b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17737743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17742be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17752be7d22fSVladimir Kondratiev 17762be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17772be7d22fSVladimir Kondratiev return -EINVAL; 17789202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 17792be7d22fSVladimir Kondratiev /* 1-st segment */ 17809202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 17819202d7b6SMaya Erez ring_index); 178241d6b093SVladimir Kondratiev if (unlikely(mcast)) { 178341d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1784230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 178541d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 178641d6b093SVladimir Kondratiev } 1787504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17883d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17895b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 17909202d7b6SMaya Erez ring_index); 1791504937d4SKirshenbaum Erez goto dma_error; 1792504937d4SKirshenbaum Erez } 1793504937d4SKirshenbaum Erez 17949202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 17953d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 179668ada71eSVladimir Kondratiev 17972be7d22fSVladimir Kondratiev /* middle segments */ 1798504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17992be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 18002be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 18012be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 18028fe59627SVladimir Kondratiev 1803e59d16c0SVladimir Kondratiev *_d = *d; 18049202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18055b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18065b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18079202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 18089202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 18092be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 18102be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1811e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1812e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 18139202d7b6SMaya Erez ring_index); 18142be7d22fSVladimir Kondratiev goto dma_error; 1815e3d2ed94SHamad Kadmany } 18169202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 18179202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 18189202d7b6SMaya Erez pa, len, ring_index); 1819c236658fSVladimir Kondratiev /* no need to check return code - 1820c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1821c236658fSVladimir Kondratiev * it will succeed here too 1822c236658fSVladimir Kondratiev */ 18233d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18242be7d22fSVladimir Kondratiev } 18252be7d22fSVladimir Kondratiev /* for the last seg only */ 18262be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1827668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18282be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 182968ada71eSVladimir Kondratiev *_d = *d; 18309202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18315b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18325b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18332be7d22fSVladimir Kondratiev 18346cdadd4dSVladimir Kondratiev /* hold reference to skb 18356cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18366cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18376cdadd4dSVladimir Kondratiev */ 18389202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 18396cdadd4dSVladimir Kondratiev 18400436fd9aSVladimir Shulman /* performance monitoring */ 18419202d7b6SMaya Erez used = wil_ring_used_tx(ring); 184210590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 18430436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18447c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18450436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18469202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 18470436fd9aSVladimir Shulman } 18487c0acf86SVladimir Kondratiev 1849eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1850eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1851eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1852eb26cff1SMaya Erez * skb before it was completed. 1853eb26cff1SMaya Erez */ 1854eb26cff1SMaya Erez wmb(); 1855eb26cff1SMaya Erez 18562be7d22fSVladimir Kondratiev /* advance swhead */ 18579202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 18589202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 18599202d7b6SMaya Erez ring->swhead); 18609202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 18613d4bde15SVladimir Kondratiev 18623d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18633d4bde15SVladimir Kondratiev * committing them to HW 18643d4bde15SVladimir Kondratiev */ 18653d4bde15SVladimir Kondratiev wmb(); 18663d4bde15SVladimir Kondratiev 1867a24a3d6aSDedy Lansky if (wil->tx_latency) 1868a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1869a24a3d6aSDedy Lansky else 1870a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1871a24a3d6aSDedy Lansky 18729202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 18732be7d22fSVladimir Kondratiev 18742be7d22fSVladimir Kondratiev return 0; 18752be7d22fSVladimir Kondratiev dma_error: 18762be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1877c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1878c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1879c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18807e594444SVladimir Kondratiev 18819202d7b6SMaya Erez i = (swhead + f) % ring->size; 18829202d7b6SMaya Erez ctx = &ring->ctx[i]; 18839202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 188468ada71eSVladimir Kondratiev *d = *_d; 188568ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18869202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 18879202d7b6SMaya Erez (union wil_tx_desc *)d, 18889202d7b6SMaya Erez ctx); 1889f88f113aSVladimir Kondratiev 1890f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18912be7d22fSVladimir Kondratiev } 18922be7d22fSVladimir Kondratiev 18932be7d22fSVladimir Kondratiev return -EINVAL; 18942be7d22fSVladimir Kondratiev } 18952be7d22fSVladimir Kondratiev 18969202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 18979202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 18985933a06dSVladimir Kondratiev { 18999202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 190010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 19015933a06dSVladimir Kondratiev int rc; 19025933a06dSVladimir Kondratiev 19035933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 19043d4bde15SVladimir Kondratiev 1905fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1906fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1907fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1908fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1909fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1910fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1911fe9ee51eSMaya Erez return -EINVAL; 1912fe9ee51eSMaya Erez } 1913fe9ee51eSMaya Erez 19149202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 19159202d7b6SMaya Erez (wil, vif, ring, skb); 19163d4bde15SVladimir Kondratiev 19175933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 19183d4bde15SVladimir Kondratiev 19195933a06dSVladimir Kondratiev return rc; 19205933a06dSVladimir Kondratiev } 19215933a06dSVladimir Kondratiev 1922f9e3033fSDedy Lansky /** 1923f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 19245bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1925f9e3033fSDedy Lansky * 1926f9e3033fSDedy Lansky * This function does one of two checks: 1927f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1928f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1929f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1930f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1931f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1932f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1933f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1934f9e3033fSDedy Lansky * 1935f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1936f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1937f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1938f9e3033fSDedy Lansky */ 1939f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 19405bd60982SLior David struct wil6210_vif *vif, 194110590c6aSGidon Studinski struct wil_ring *ring, 1942f9e3033fSDedy Lansky bool check_stop) 1943f9e3033fSDedy Lansky { 1944f9e3033fSDedy Lansky int i; 1945f9e3033fSDedy Lansky 19465bd60982SLior David if (unlikely(!vif)) 19475bd60982SLior David return; 1948f9e3033fSDedy Lansky 194910590c6aSGidon Studinski if (ring) 19505bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 195110590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19525bd60982SLior David vif->net_queue_stopped); 19535bd60982SLior David else 19545bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19555bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19565bd60982SLior David 19575bd60982SLior David if (check_stop == vif->net_queue_stopped) 1958f9e3033fSDedy Lansky /* net queues already in desired state */ 1959f9e3033fSDedy Lansky return; 1960f9e3033fSDedy Lansky 1961f9e3033fSDedy Lansky if (check_stop) { 196210590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1963f9e3033fSDedy Lansky /* not enough room in the vring */ 19645bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19655bd60982SLior David vif->net_queue_stopped = true; 1966f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1967f9e3033fSDedy Lansky } 1968f9e3033fSDedy Lansky return; 1969f9e3033fSDedy Lansky } 1970f9e3033fSDedy Lansky 1971fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1972fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1973fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1974fe9ee51eSMaya Erez return; 1975fe9ee51eSMaya Erez 1976f9e3033fSDedy Lansky /* check wake */ 1977f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 197810590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 197910590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 1980f9e3033fSDedy Lansky 198110590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 198210590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 1983f9e3033fSDedy Lansky continue; 1984f9e3033fSDedy Lansky 198510590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 198610590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 198710590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 1988f9e3033fSDedy Lansky return; 1989f9e3033fSDedy Lansky } 1990f9e3033fSDedy Lansky } 1991f9e3033fSDedy Lansky 199210590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 199310590c6aSGidon Studinski /* enough room in the ring */ 1994f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 19955bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 19965bd60982SLior David vif->net_queue_stopped = false; 1997f9e3033fSDedy Lansky } 1998f9e3033fSDedy Lansky } 1999f9e3033fSDedy Lansky 20005bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 200110590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2002f9e3033fSDedy Lansky { 2003f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 200410590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2005f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2006f9e3033fSDedy Lansky } 2007f9e3033fSDedy Lansky 20085bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 200910590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2010f9e3033fSDedy Lansky { 2011f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 201210590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2013f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2014f9e3033fSDedy Lansky } 2015f9e3033fSDedy Lansky 20162be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 20172be7d22fSVladimir Kondratiev { 2018e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2019e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 20203df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 202141d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 20229202d7b6SMaya Erez struct wil_ring *ring; 2023aa27deaaSVladimir Kondratiev static bool pr_once_fw; 20242be7d22fSVladimir Kondratiev int rc; 20252be7d22fSVladimir Kondratiev 2026af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 202733c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2028aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20292be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2030aa27deaaSVladimir Kondratiev pr_once_fw = true; 2031aa27deaaSVladimir Kondratiev } 20322be7d22fSVladimir Kondratiev goto drop; 20332be7d22fSVladimir Kondratiev } 20345bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 20355bd60982SLior David wil_dbg_ratelimited(wil, 20365bd60982SLior David "VIF not connected, packet dropped\n"); 20372be7d22fSVladimir Kondratiev goto drop; 20382be7d22fSVladimir Kondratiev } 2039e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20402be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20412be7d22fSVladimir Kondratiev goto drop; 20422be7d22fSVladimir Kondratiev } 2043aa27deaaSVladimir Kondratiev pr_once_fw = false; 2044d58db4e4SVladimir Kondratiev 20452be7d22fSVladimir Kondratiev /* find vring */ 2046e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2047a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 20489202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2049a895cb8bSLior David } else if (bcast) { 2050e00243faSLior David if (vif->pbss) 2051a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2052a895cb8bSLior David * all stations VRINGs 2053a895cb8bSLior David */ 20549202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2055e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2056a895cb8bSLior David /* AP has a dedicated bcast VRING */ 20579202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2058a895cb8bSLior David else 2059a895cb8bSLior David /* unexpected combination, fallback to duplicating 2060a895cb8bSLior David * the skb in all stations VRINGs 2061a895cb8bSLior David */ 20629202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2063a895cb8bSLior David } else { 2064a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 20659202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 206654ed90a8SVladimir Kondratiev } 20679202d7b6SMaya Erez if (unlikely(!ring)) { 206810590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20692be7d22fSVladimir Kondratiev goto drop; 20702be7d22fSVladimir Kondratiev } 20712be7d22fSVladimir Kondratiev /* set up vring entry */ 20729202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2073d58db4e4SVladimir Kondratiev 20742be7d22fSVladimir Kondratiev switch (rc) { 20752be7d22fSVladimir Kondratiev case 0: 2076f9e3033fSDedy Lansky /* shall we stop net queues? */ 20779202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2078795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20792be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20802be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20812be7d22fSVladimir Kondratiev case -ENOMEM: 20822be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20832be7d22fSVladimir Kondratiev default: 2084afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20852be7d22fSVladimir Kondratiev } 20862be7d22fSVladimir Kondratiev drop: 20872be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20882be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20892be7d22fSVladimir Kondratiev 20902be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20912be7d22fSVladimir Kondratiev } 20922be7d22fSVladimir Kondratiev 2093a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2094a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2095a24a3d6aSDedy Lansky { 2096a24a3d6aSDedy Lansky int skb_time_us; 2097a24a3d6aSDedy Lansky int bin; 2098a24a3d6aSDedy Lansky 2099a24a3d6aSDedy Lansky if (!wil->tx_latency) 2100a24a3d6aSDedy Lansky return; 2101a24a3d6aSDedy Lansky 2102a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2103a24a3d6aSDedy Lansky return; 2104a24a3d6aSDedy Lansky 2105a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2106a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2107a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2108a24a3d6aSDedy Lansky 2109a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2110a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2111a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2112a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2113a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2114a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2115a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2116a24a3d6aSDedy Lansky } 2117a24a3d6aSDedy Lansky 21182be7d22fSVladimir Kondratiev /** 21192be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 21202be7d22fSVladimir Kondratiev * 2121e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2122e0287c4aSVladimir Kondratiev * 21232be7d22fSVladimir Kondratiev * Safe to call from IRQ 21242be7d22fSVladimir Kondratiev */ 21255bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 21262be7d22fSVladimir Kondratiev { 21275bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 21285bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 21292be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 213010590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 213110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2132e0287c4aSVladimir Kondratiev int done = 0; 213310590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 213441d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2135c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 21360436fd9aSVladimir Shulman int used_before_complete; 21370436fd9aSVladimir Shulman int used_new; 21382be7d22fSVladimir Kondratiev 213933c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21402be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2141e0287c4aSVladimir Kondratiev return 0; 21422be7d22fSVladimir Kondratiev } 21432be7d22fSVladimir Kondratiev 214433c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2145097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2146097638a0SVladimir Kondratiev return 0; 2147097638a0SVladimir Kondratiev } 2148097638a0SVladimir Kondratiev 2149af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21502be7d22fSVladimir Kondratiev 215110590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 21520436fd9aSVladimir Shulman 215341d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 215441d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 215541d6b093SVladimir Kondratiev 215610590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2157c236658fSVladimir Kondratiev int new_swtail; 2158c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2159c236658fSVladimir Kondratiev /** 2160c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21613d4bde15SVladimir Kondratiev * last fragment. look for it. 21623d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2163c236658fSVladimir Kondratiev */ 2164c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2165c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2166c236658fSVladimir Kondratiev 216710590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 216833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2169c236658fSVladimir Kondratiev break; 2170c236658fSVladimir Kondratiev 2171c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2172c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21734de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21747e594444SVladimir Kondratiev u16 dmalen; 217576dfa4b7SVladimir Kondratiev struct sk_buff *skb; 217676dfa4b7SVladimir Kondratiev 217776dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 217876dfa4b7SVladimir Kondratiev skb = ctx->skb; 217910590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 21804de41befSVladimir Kondratiev 218168ada71eSVladimir Kondratiev *d = *_d; 21824de41befSVladimir Kondratiev 21837e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 218498658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 218598658095SVladimir Kondratiev d->dma.error); 21867743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21875b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21885b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21895b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21905b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21912be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21922be7d22fSVladimir Kondratiev 21939202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21949202d7b6SMaya Erez (union wil_tx_desc *)d, 21959202d7b6SMaya Erez ctx); 2196f88f113aSVladimir Kondratiev 21972be7d22fSVladimir Kondratiev if (skb) { 219833c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2199795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2200795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 220141d6b093SVladimir Kondratiev if (stats) { 220241d6b093SVladimir Kondratiev stats->tx_packets++; 2203c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2204a24a3d6aSDedy Lansky 2205a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2206a24a3d6aSDedy Lansky &wil->sta[cid]); 220741d6b093SVladimir Kondratiev } 2208795ce734SVladimir Kondratiev } else { 2209795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 221041d6b093SVladimir Kondratiev if (stats) 2211c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2212795ce734SVladimir Kondratiev } 2213713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 22142be7d22fSVladimir Kondratiev } 2215f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2216eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 221710590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2218eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2219eb26cff1SMaya Erez * is completed. 2220eb26cff1SMaya Erez */ 2221eb26cff1SMaya Erez wmb(); 2222c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 222303269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 222403269c65SVladimir Kondratiev * so hardware will not try to process this desc., 222503269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 222603269c65SVladimir Kondratiev */ 222710590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2228e0287c4aSVladimir Kondratiev done++; 22292be7d22fSVladimir Kondratiev } 2230c236658fSVladimir Kondratiev } 223167c3e1b4SVladimir Kondratiev 22320436fd9aSVladimir Shulman /* performance monitoring */ 223310590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 223410590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 22350436fd9aSVladimir Shulman used_new, used_before_complete)) { 22360436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 22370436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 22387c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 22397c0acf86SVladimir Kondratiev } 224067c3e1b4SVladimir Kondratiev 2241f9e3033fSDedy Lansky /* shall we wake net queues? */ 2242f9e3033fSDedy Lansky if (done) 22435bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2244e0287c4aSVladimir Kondratiev 2245e0287c4aSVladimir Kondratiev return done; 22462be7d22fSVladimir Kondratiev } 224796c93589SGidon Studinski 224896c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 224996c93589SGidon Studinski { 225096c93589SGidon Studinski return 0; 225196c93589SGidon Studinski } 225296c93589SGidon Studinski 225396c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 225496c93589SGidon Studinski 22557be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 22567be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 22571bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 22587be13fc3SGidon Studinski { 22597be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 22607be13fc3SGidon Studinski 22617be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 22627be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); 22637be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 22647be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 22657be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 22661bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 22677be13fc3SGidon Studinski } 22687be13fc3SGidon Studinski 226996c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 227096c93589SGidon Studinski { 227196c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 227296c93589SGidon Studinski wil_configure_interrupt_moderation; 227396c93589SGidon Studinski /* TX ops */ 22749202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 22759202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 22769202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 227796c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 227896c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 227996c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 228096c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 228196c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 228296c93589SGidon Studinski /* RX ops */ 228396c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 22847be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 22857be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 22867be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 22877be13fc3SGidon Studinski wil_get_netif_rx_params; 22887be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2289e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 22907be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 229196c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 229296c93589SGidon Studinski } 2293