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; 80df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 81fe9ee51eSMaya Erez 82df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 8310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 8410590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 8510590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 8610590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 87fe9ee51eSMaya Erez 88fe9ee51eSMaya Erez spin_lock(&txdata->lock); 89fe9ee51eSMaya Erez 90fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 91fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 92fe9ee51eSMaya Erez continue; 93fe9ee51eSMaya Erez } 94fe9ee51eSMaya Erez 95fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 96fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 97fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 9810590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 99fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 100fe9ee51eSMaya Erez wil_dbg_pm(wil, 101fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 102fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 103fe9ee51eSMaya Erez return false; 104fe9ee51eSMaya Erez } 105fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 106fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 107fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 108fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 109fe9ee51eSMaya Erez msleep(20); 110fe9ee51eSMaya Erez spin_lock(&txdata->lock); 111fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 112fe9ee51eSMaya Erez break; 113fe9ee51eSMaya Erez } 114fe9ee51eSMaya Erez } 115fe9ee51eSMaya Erez 116fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 117fe9ee51eSMaya Erez } 118fe9ee51eSMaya Erez 119fe9ee51eSMaya Erez return true; 120fe9ee51eSMaya Erez } 121fe9ee51eSMaya Erez 12210590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1232be7d22fSVladimir Kondratiev { 1242be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1252be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1262be7d22fSVladimir Kondratiev uint i; 1272be7d22fSVladimir Kondratiev 128af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1299cf10d62SVladimir Kondratiev 1302be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1312be7d22fSVladimir Kondratiev 1322be7d22fSVladimir Kondratiev vring->swhead = 0; 1332be7d22fSVladimir Kondratiev vring->swtail = 0; 134f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1352be7d22fSVladimir Kondratiev if (!vring->ctx) { 1362be7d22fSVladimir Kondratiev vring->va = NULL; 1372be7d22fSVladimir Kondratiev return -ENOMEM; 1382be7d22fSVladimir Kondratiev } 139f2de576dSHamad Kadmany 1400436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 141f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 142f2de576dSHamad Kadmany * 143f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 144f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1453dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1463dc2c13bSLazar Alexei * allocation before allocating vring memory. 147f2de576dSHamad Kadmany * 148f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 149f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 150f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1512be7d22fSVladimir Kondratiev */ 1523dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 153f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 154f2de576dSHamad Kadmany 1552be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1562be7d22fSVladimir Kondratiev if (!vring->va) { 1572be7d22fSVladimir Kondratiev kfree(vring->ctx); 1582be7d22fSVladimir Kondratiev vring->ctx = NULL; 1592be7d22fSVladimir Kondratiev return -ENOMEM; 1602be7d22fSVladimir Kondratiev } 161f2de576dSHamad Kadmany 1623dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1633dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1643dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 165f2de576dSHamad Kadmany 1662be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1672be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1682be7d22fSVladimir Kondratiev * we can use any 1692be7d22fSVladimir Kondratiev */ 1702be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 17110590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 17210590c6aSGidon Studinski &vring->va[i].tx.legacy; 1738fe59627SVladimir Kondratiev 17468ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1752be7d22fSVladimir Kondratiev } 1762be7d22fSVladimir Kondratiev 17739c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 17839c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1792be7d22fSVladimir Kondratiev 1802be7d22fSVladimir Kondratiev return 0; 1812be7d22fSVladimir Kondratiev } 1822be7d22fSVladimir Kondratiev 1839202d7b6SMaya Erez static void wil_txdesc_unmap(struct device *dev, union wil_tx_desc *desc, 1842232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1852232abd5SVladimir Kondratiev { 1869202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 1872232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1882232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1898fe59627SVladimir Kondratiev 1902232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1912232abd5SVladimir Kondratiev case wil_mapped_as_single: 1922232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1932232abd5SVladimir Kondratiev break; 1942232abd5SVladimir Kondratiev case wil_mapped_as_page: 1952232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1962232abd5SVladimir Kondratiev break; 1972232abd5SVladimir Kondratiev default: 1982232abd5SVladimir Kondratiev break; 1992232abd5SVladimir Kondratiev } 2002232abd5SVladimir Kondratiev } 2012232abd5SVladimir Kondratiev 20296c93589SGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring) 2032be7d22fSVladimir Kondratiev { 2042be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2052be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2062be7d22fSVladimir Kondratiev 2079b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 20896c93589SGidon Studinski if (!vring->is_rx) { 20910590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 210ef77285fSVladimir Kondratiev 211ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 212ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 213ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 214ef77285fSVladimir Kondratiev } else { 215ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 216ef77285fSVladimir Kondratiev vring->size, vring->va, 217ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 218ef77285fSVladimir Kondratiev } 219ef77285fSVladimir Kondratiev 22010590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 22168ada71eSVladimir Kondratiev dma_addr_t pa; 2227e594444SVladimir Kondratiev u16 dmalen; 223f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 22468ada71eSVladimir Kondratiev 22596c93589SGidon Studinski if (!vring->is_rx) { 22668ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 22768ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 22810590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 22968ada71eSVladimir Kondratiev 230f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 23134b8886eSMaya Erez if (!ctx) { 23234b8886eSMaya Erez wil_dbg_txrx(wil, 23334b8886eSMaya Erez "ctx(%d) was already completed\n", 23434b8886eSMaya Erez vring->swtail); 23510590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 23634b8886eSMaya Erez continue; 23734b8886eSMaya Erez } 23868ada71eSVladimir Kondratiev *d = *_d; 2399202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 240f88f113aSVladimir Kondratiev if (ctx->skb) 241f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 24210590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2432be7d22fSVladimir Kondratiev } else { /* rx */ 24468ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 24568ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 24610590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 24768ada71eSVladimir Kondratiev 248f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 24968ada71eSVladimir Kondratiev *d = *_d; 25068ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2517e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2527e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 253f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 25410590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2552be7d22fSVladimir Kondratiev } 2562be7d22fSVladimir Kondratiev } 2572be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2582be7d22fSVladimir Kondratiev kfree(vring->ctx); 2592be7d22fSVladimir Kondratiev vring->pa = 0; 2602be7d22fSVladimir Kondratiev vring->va = NULL; 2612be7d22fSVladimir Kondratiev vring->ctx = NULL; 2622be7d22fSVladimir Kondratiev } 2632be7d22fSVladimir Kondratiev 2642be7d22fSVladimir Kondratiev /** 2652be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2662be7d22fSVladimir Kondratiev * 2672be7d22fSVladimir Kondratiev * Safe to call from IRQ 2682be7d22fSVladimir Kondratiev */ 26910590c6aSGidon Studinski static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct wil_ring *vring, 2702be7d22fSVladimir Kondratiev u32 i, int headroom) 2712be7d22fSVladimir Kondratiev { 2722be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 27352a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 27468ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 27510590c6aSGidon Studinski volatile struct vring_rx_desc *_d = &vring->va[i].rx.legacy; 2762be7d22fSVladimir Kondratiev dma_addr_t pa; 2772be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2788fe59627SVladimir Kondratiev 2792be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2802be7d22fSVladimir Kondratiev return -ENOMEM; 2812be7d22fSVladimir Kondratiev 2822be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2832be7d22fSVladimir Kondratiev skb_put(skb, sz); 2842be7d22fSVladimir Kondratiev 2850b853210SMaya Erez /** 2860b853210SMaya Erez * Make sure that the network stack calculates checksum for packets 2870b853210SMaya Erez * which failed the HW checksum calculation 2880b853210SMaya Erez */ 2890b853210SMaya Erez skb->ip_summed = CHECKSUM_NONE; 2900b853210SMaya Erez 2912be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2922be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2932be7d22fSVladimir Kondratiev kfree_skb(skb); 2942be7d22fSVladimir Kondratiev return -ENOMEM; 2952be7d22fSVladimir Kondratiev } 2962be7d22fSVladimir Kondratiev 29748c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29868ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2992be7d22fSVladimir Kondratiev /* ip_length don't care */ 3002be7d22fSVladimir Kondratiev /* b11 don't care */ 3012be7d22fSVladimir Kondratiev /* error don't care */ 3022be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3037e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 30468ada71eSVladimir Kondratiev *_d = *d; 305f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3062be7d22fSVladimir Kondratiev 3072be7d22fSVladimir Kondratiev return 0; 3082be7d22fSVladimir Kondratiev } 3092be7d22fSVladimir Kondratiev 3102be7d22fSVladimir Kondratiev /** 3112be7d22fSVladimir Kondratiev * Adds radiotap header 3122be7d22fSVladimir Kondratiev * 3132be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3142be7d22fSVladimir Kondratiev * 3152be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3162be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3172be7d22fSVladimir Kondratiev * - Phy info 3182be7d22fSVladimir Kondratiev */ 3192be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 32033e61169SVladimir Kondratiev struct sk_buff *skb) 3212be7d22fSVladimir Kondratiev { 3222be7d22fSVladimir Kondratiev struct wil6210_rtap { 3232be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3242be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3252be7d22fSVladimir Kondratiev /* flags */ 3262be7d22fSVladimir Kondratiev u8 flags; 3272be7d22fSVladimir Kondratiev /* channel */ 3282be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3292be7d22fSVladimir Kondratiev __le16 chnl_flags; 3302be7d22fSVladimir Kondratiev /* MCS */ 3312be7d22fSVladimir Kondratiev u8 mcs_present; 3322be7d22fSVladimir Kondratiev u8 mcs_flags; 3332be7d22fSVladimir Kondratiev u8 mcs_index; 3342be7d22fSVladimir Kondratiev } __packed; 3352be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3362be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3372be7d22fSVladimir Kondratiev /* vendor */ 3382be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3392be7d22fSVladimir Kondratiev u8 vendor_ns; 3402be7d22fSVladimir Kondratiev __le16 vendor_skip; 3412be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3422be7d22fSVladimir Kondratiev } __packed; 34333e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3442be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3452be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3462be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3472be7d22fSVladimir Kondratiev static char phy_data[128]; 3487d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3492be7d22fSVladimir Kondratiev 3502be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3512be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3522be7d22fSVladimir Kondratiev /* calculate additional length */ 3532be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3542be7d22fSVladimir Kondratiev /** 3552be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3562be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3572be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3582be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3592be7d22fSVladimir Kondratiev */ 3602be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3612be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3628fe59627SVladimir Kondratiev 3632be7d22fSVladimir Kondratiev if (len > 8) { 3642be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3652be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3668fe59627SVladimir Kondratiev 3672be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3682be7d22fSVladimir Kondratiev phy_length = len - 8; 3692be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3702be7d22fSVladimir Kondratiev } 3712be7d22fSVladimir Kondratiev } 3722be7d22fSVladimir Kondratiev } 3732be7d22fSVladimir Kondratiev rtap_len += phy_length; 3742be7d22fSVladimir Kondratiev } 3752be7d22fSVladimir Kondratiev 3762be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3772be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3789165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3792be7d22fSVladimir Kondratiev return; 3802be7d22fSVladimir Kondratiev } 3812be7d22fSVladimir Kondratiev 382d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 3832be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3842be7d22fSVladimir Kondratiev 3852be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3862be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3872be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3882be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3892be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3902be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3912be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3922be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3932be7d22fSVladimir Kondratiev 3942be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3952be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3962be7d22fSVladimir Kondratiev 3972be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3982be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3992be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 4002be7d22fSVladimir Kondratiev 4012be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 4022be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 4032be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 4042be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 4052be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 4062be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 4072be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4082be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4092be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4102be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4112be7d22fSVladimir Kondratiev phy_length); 4122be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4132be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4142be7d22fSVladimir Kondratiev phy_length); 4152be7d22fSVladimir Kondratiev } 4162be7d22fSVladimir Kondratiev } 4172be7d22fSVladimir Kondratiev 4187be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 419fe9ee51eSMaya Erez { 420fe9ee51eSMaya Erez struct vring_rx_desc *_d; 42110590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 422fe9ee51eSMaya Erez 42310590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 424fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 425fe9ee51eSMaya Erez return false; 426fe9ee51eSMaya Erez 427fe9ee51eSMaya Erez return true; 428fe9ee51eSMaya Erez } 429fe9ee51eSMaya Erez 4302be7d22fSVladimir Kondratiev /** 4312be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4322be7d22fSVladimir Kondratiev * 43333e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 43433e61169SVladimir Kondratiev * 4352be7d22fSVladimir Kondratiev * Safe to call from IRQ 4362be7d22fSVladimir Kondratiev */ 4372be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 43810590c6aSGidon Studinski struct wil_ring *vring) 4392be7d22fSVladimir Kondratiev { 4402be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4415bd60982SLior David struct wil6210_vif *vif; 4425bd60982SLior David struct net_device *ndev; 44368ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 44468ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4452be7d22fSVladimir Kondratiev struct sk_buff *skb; 4462be7d22fSVladimir Kondratiev dma_addr_t pa; 447c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 44852a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4497e594444SVladimir Kondratiev u16 dmalen; 4502be7d22fSVladimir Kondratiev u8 ftype; 4515bd60982SLior David int cid, mid; 4523b282bc6SVladimir Kondratiev int i; 453c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 454c8b78b5fSVladimir Kondratiev 45533e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 45633e61169SVladimir Kondratiev 4573b282bc6SVladimir Kondratiev again: 45810590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4592be7d22fSVladimir Kondratiev return NULL; 4602be7d22fSVladimir Kondratiev 4613b282bc6SVladimir Kondratiev i = (int)vring->swhead; 46210590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 46333c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4642be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4652be7d22fSVladimir Kondratiev return NULL; 4662be7d22fSVladimir Kondratiev } 4672be7d22fSVladimir Kondratiev 468148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 469148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 47010590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 471148416a9SVladimir Kondratiev if (!skb) { 472148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4733b282bc6SVladimir Kondratiev goto again; 474148416a9SVladimir Kondratiev } 47568ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 47668ada71eSVladimir Kondratiev *d = *_d; 47768ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 47868ada71eSVladimir Kondratiev 47968ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 48068ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 48168ada71eSVladimir Kondratiev 482148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 483148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 484a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 48568ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 48668ada71eSVladimir Kondratiev 4873b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4885bd60982SLior David mid = wil_rxdesc_mid(d); 4895bd60982SLior David vif = wil->vifs[mid]; 4905bd60982SLior David 4915bd60982SLior David if (unlikely(!vif)) { 4925bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4935bd60982SLior David mid); 4945bd60982SLior David kfree_skb(skb); 4955bd60982SLior David goto again; 4965bd60982SLior David } 4975bd60982SLior David ndev = vif_to_ndev(vif); 4983b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4993b282bc6SVladimir Kondratiev 50033c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 501e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5023b282bc6SVladimir Kondratiev stats->rx_large_frame++; 503110dea00SWei Yongjun kfree_skb(skb); 5043b282bc6SVladimir Kondratiev goto again; 505e270045bSVladimir Kondratiev } 5067e594444SVladimir Kondratiev skb_trim(skb, dmalen); 50733e61169SVladimir Kondratiev 5081cbbcb08SVladimir Kondratiev prefetch(skb->data); 5091cbbcb08SVladimir Kondratiev 510c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 511c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 512c0d37713SVladimir Kondratiev 513c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 514c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 515c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5162be7d22fSVladimir Kondratiev 5172be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5182be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 51933e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5202be7d22fSVladimir Kondratiev 5212be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5222be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5232be7d22fSVladimir Kondratiev return skb; 524a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5252be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5262be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5272be7d22fSVladimir Kondratiev */ 52868ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 52933c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 530a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 531a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 532a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 533a8313341SVladimir Kondratiev 534a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 535a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 536a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5373b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 538a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 539a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 540a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 541a8313341SVladimir Kondratiev mid, cid, tid, seq); 5425bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 543a8313341SVladimir Kondratiev } else { 544a8313341SVladimir Kondratiev /* print again all info. One can enable only this 545a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 546a8313341SVladimir Kondratiev */ 547a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 548a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 549a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 550a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 551a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 552a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 553a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 554a8313341SVladimir Kondratiev } 5552be7d22fSVladimir Kondratiev kfree_skb(skb); 5563b282bc6SVladimir Kondratiev goto again; 5572be7d22fSVladimir Kondratiev } 5582be7d22fSVladimir Kondratiev 559c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5602be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5613b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5622be7d22fSVladimir Kondratiev kfree_skb(skb); 5633b282bc6SVladimir Kondratiev goto again; 5642be7d22fSVladimir Kondratiev } 5652be7d22fSVladimir Kondratiev 566504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 567504937d4SKirshenbaum Erez * and in case of error drop the packet 568504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 569504937d4SKirshenbaum Erez */ 57033c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 571504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 57233c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 573504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5744a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5754a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5764a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5774a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5784a68ab10SVladimir Kondratiev */ 5790b853210SMaya Erez else 5800b853210SMaya Erez stats->rx_csum_err++; 581504937d4SKirshenbaum Erez } 582504937d4SKirshenbaum Erez 583c406ea7cSVladimir Kondratiev if (snaplen) { 584c406ea7cSVladimir Kondratiev /* Packet layout 585c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 586c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 587c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 588c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 589c406ea7cSVladimir Kondratiev */ 590c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 591c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 592c406ea7cSVladimir Kondratiev } 593c406ea7cSVladimir Kondratiev 5942be7d22fSVladimir Kondratiev return skb; 5952be7d22fSVladimir Kondratiev } 5962be7d22fSVladimir Kondratiev 5972be7d22fSVladimir Kondratiev /** 5982be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5992be7d22fSVladimir Kondratiev * buffers posted at @swtail 6005bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6015bd60982SLior David * allocate skbs with headroom according to main interface only. This 6025bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6035bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6045bd60982SLior David * and we will need to fix this code once we add support. 6052be7d22fSVladimir Kondratiev */ 6062be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6072be7d22fSVladimir Kondratiev { 608e00243faSLior David struct net_device *ndev = wil->main_ndev; 60910590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6102be7d22fSVladimir Kondratiev u32 next_tail; 6112be7d22fSVladimir Kondratiev int rc = 0; 6122be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6132be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6142be7d22fSVladimir Kondratiev 61510590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6162be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6172be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6182be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 61933c477fdSVladimir Kondratiev if (unlikely(rc)) { 6203d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6212be7d22fSVladimir Kondratiev rc, v->swtail); 6222be7d22fSVladimir Kondratiev break; 6232be7d22fSVladimir Kondratiev } 6242be7d22fSVladimir Kondratiev } 625ab6d7cc3SMaya Erez 626ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 627ab6d7cc3SMaya Erez * committing them to HW 628ab6d7cc3SMaya Erez */ 629ab6d7cc3SMaya Erez wmb(); 630ab6d7cc3SMaya Erez 631b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6322be7d22fSVladimir Kondratiev 6332be7d22fSVladimir Kondratiev return rc; 6342be7d22fSVladimir Kondratiev } 6352be7d22fSVladimir Kondratiev 63658527421SVladimir Kondratiev /** 63758527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 63858527421SVladimir Kondratiev * @cs: One area of memory 63958527421SVladimir Kondratiev * @ct: Another area of memory 64058527421SVladimir Kondratiev * @count: The size of the area. 64158527421SVladimir Kondratiev * 64258527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 64358527421SVladimir Kondratiev * with minimal modifications 64458527421SVladimir Kondratiev */ 6457be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 64658527421SVladimir Kondratiev { 64758527421SVladimir Kondratiev const unsigned char *su1, *su2; 64858527421SVladimir Kondratiev int res = 0; 64958527421SVladimir Kondratiev 65058527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 65158527421SVladimir Kondratiev --su1, --su2, count--) { 65258527421SVladimir Kondratiev res = *su1 - *su2; 65358527421SVladimir Kondratiev if (res) 65458527421SVladimir Kondratiev break; 65558527421SVladimir Kondratiev } 65658527421SVladimir Kondratiev return res; 65758527421SVladimir Kondratiev } 65858527421SVladimir Kondratiev 65958527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 66058527421SVladimir Kondratiev { 66158527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 66258527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 66358527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 66458527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 66558527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 66658527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 66758527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 66858527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 66958527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 67058527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 67158527421SVladimir Kondratiev 67258527421SVladimir Kondratiev if (!cc->key_set) { 67358527421SVladimir Kondratiev wil_err_ratelimited(wil, 67458527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 67558527421SVladimir Kondratiev cid, tid, mc, key_id); 67658527421SVladimir Kondratiev return -EINVAL; 67758527421SVladimir Kondratiev } 67858527421SVladimir Kondratiev 67958527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 68058527421SVladimir Kondratiev wil_err_ratelimited(wil, 68158527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 68258527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 68358527421SVladimir Kondratiev return -EINVAL; 68458527421SVladimir Kondratiev } 68558527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 68658527421SVladimir Kondratiev 68758527421SVladimir Kondratiev return 0; 68858527421SVladimir Kondratiev } 68958527421SVladimir Kondratiev 690e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 691e15af41cSDedy Lansky struct wil_net_stats *stats) 692e15af41cSDedy Lansky { 693e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 694e15af41cSDedy Lansky 695e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 696e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 697e15af41cSDedy Lansky stats->rx_mic_error++; 698e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 699e15af41cSDedy Lansky return -EFAULT; 700e15af41cSDedy Lansky } 701e15af41cSDedy Lansky 702e15af41cSDedy Lansky return 0; 703e15af41cSDedy Lansky } 704e15af41cSDedy Lansky 7057be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 7067be13fc3SGidon Studinski int *security) 7077be13fc3SGidon Studinski { 7087be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 7097be13fc3SGidon Studinski 7107be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 7117be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 7127be13fc3SGidon Studinski } 7137be13fc3SGidon Studinski 7142be7d22fSVladimir Kondratiev /* 7152be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 716e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 7172be7d22fSVladimir Kondratiev */ 718b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 7192be7d22fSVladimir Kondratiev { 720c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 721e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 722c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 723e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 7242be7d22fSVladimir Kondratiev unsigned int len = skb->len; 7257be13fc3SGidon Studinski int cid; 7267be13fc3SGidon Studinski int security; 727c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 728c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 729c42da999SVladimir Kondratiev * is not suitable, need to look at data 730c42da999SVladimir Kondratiev */ 731c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 7327be13fc3SGidon Studinski struct wil_net_stats *stats; 733c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 734c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 735c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 736c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 737c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 738c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 739c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 740c42da999SVladimir Kondratiev }; 7412be7d22fSVladimir Kondratiev 7427be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 7437be13fc3SGidon Studinski 7447be13fc3SGidon Studinski stats = &wil->sta[cid].stats; 7457be13fc3SGidon Studinski 7460553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7470553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7480553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7490553640dSVladimir Shulman * mechanism, core will be chosen according 7500553640dSVladimir Shulman * to user-level rps configuration. 7510553640dSVladimir Shulman */ 7520553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7530553640dSVladimir Shulman 754241804cbSVladimir Kondratiev skb_orphan(skb); 755241804cbSVladimir Kondratiev 7567be13fc3SGidon Studinski if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 75758527421SVladimir Kondratiev rc = GRO_DROP; 75858527421SVladimir Kondratiev dev_kfree_skb(skb); 75958527421SVladimir Kondratiev stats->rx_replay++; 76058527421SVladimir Kondratiev goto stats; 76158527421SVladimir Kondratiev } 76258527421SVladimir Kondratiev 763e15af41cSDedy Lansky /* check errors reported by HW and update statistics */ 764e15af41cSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 765e15af41cSDedy Lansky dev_kfree_skb(skb); 766e15af41cSDedy Lansky return; 767e15af41cSDedy Lansky } 768e15af41cSDedy Lansky 7699a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 7709a65064aSDedy Lansky if (mcast && ether_addr_equal(eth->h_source, ndev->dev_addr)) { 7719a65064aSDedy Lansky /* mcast packet looped back to us */ 7729a65064aSDedy Lansky rc = GRO_DROP; 7739a65064aSDedy Lansky dev_kfree_skb(skb); 7749a65064aSDedy Lansky goto stats; 7759a65064aSDedy Lansky } 7769a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 777c42da999SVladimir Kondratiev if (mcast) { 778c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 779c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 780c42da999SVladimir Kondratiev */ 781c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 782c42da999SVladimir Kondratiev } else { 783e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 784e00243faSLior David eth->h_dest); 7852be7d22fSVladimir Kondratiev 786c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 787c42da999SVladimir Kondratiev /* The destination station is associated to 788c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 789c42da999SVladimir Kondratiev * directly to it and do not pass it to local 790c42da999SVladimir Kondratiev * net stack. 791c42da999SVladimir Kondratiev */ 792c42da999SVladimir Kondratiev xmit_skb = skb; 793c42da999SVladimir Kondratiev skb = NULL; 794c42da999SVladimir Kondratiev } 795c42da999SVladimir Kondratiev } 796c42da999SVladimir Kondratiev } 797c42da999SVladimir Kondratiev if (xmit_skb) { 798c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 799c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 800c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 801c42da999SVladimir Kondratiev */ 802c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 803c42da999SVladimir Kondratiev xmit_skb->priority += 256; 804c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 805c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 806c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 807c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 808c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 809c42da999SVladimir Kondratiev } 810c42da999SVladimir Kondratiev 811c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 812c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 8135bd60982SLior David skb->dev = ndev; 814c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 815c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 816c42da999SVladimir Kondratiev len, gro_res_str[rc]); 817c42da999SVladimir Kondratiev } 81858527421SVladimir Kondratiev stats: 819c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 820b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 821b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 822b5998e6aSVladimir Kondratiev stats->rx_dropped++; 823b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 824b5998e6aSVladimir Kondratiev } else { 8252be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 826c8b78b5fSVladimir Kondratiev stats->rx_packets++; 8272be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 828c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 829c42da999SVladimir Kondratiev if (mcast) 830c42da999SVladimir Kondratiev ndev->stats.multicast++; 831194b482bSVladimir Kondratiev } 8322be7d22fSVladimir Kondratiev } 8332be7d22fSVladimir Kondratiev 8342be7d22fSVladimir Kondratiev /** 8352be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 8362be7d22fSVladimir Kondratiev * 837e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8382be7d22fSVladimir Kondratiev */ 839e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8402be7d22fSVladimir Kondratiev { 841e00243faSLior David struct net_device *ndev = wil->main_ndev; 842e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 84310590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 8442be7d22fSVladimir Kondratiev struct sk_buff *skb; 8452be7d22fSVladimir Kondratiev 84633c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8472be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8482be7d22fSVladimir Kondratiev return; 8492be7d22fSVladimir Kondratiev } 850af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 851e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 852e0287c4aSVladimir Kondratiev (*quota)--; 8532be7d22fSVladimir Kondratiev 854e00243faSLior David /* monitor is currently supported on main interface only */ 855e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8562be7d22fSVladimir Kondratiev skb->dev = ndev; 8572be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8582be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8592be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8602be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 861b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8622be7d22fSVladimir Kondratiev } else { 863b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8642be7d22fSVladimir Kondratiev } 8652be7d22fSVladimir Kondratiev } 8662be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8672be7d22fSVladimir Kondratiev } 8682be7d22fSVladimir Kondratiev 86952a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 87052a45702SLior David { 87152a45702SLior David wil->rx_buf_len = rx_large_buf ? 87252a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 87352a45702SLior David if (mtu_max > wil->rx_buf_len) { 87452a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 87552a45702SLior David * backward compatibility (mtu_max parameter was also used 87652a45702SLior David * to support receiving large packets) 87752a45702SLior David */ 87852a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 87952a45702SLior David wil->rx_buf_len = mtu_max; 88052a45702SLior David } 88152a45702SLior David } 88252a45702SLior David 88396c93589SGidon Studinski static int wil_rx_init(struct wil6210_priv *wil, u16 size) 8842be7d22fSVladimir Kondratiev { 88510590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8862be7d22fSVladimir Kondratiev int rc; 8872be7d22fSVladimir Kondratiev 888af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8899cf10d62SVladimir Kondratiev 8908bf6adb9SVladimir Kondratiev if (vring->va) { 8918bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8928bf6adb9SVladimir Kondratiev return -EINVAL; 8938bf6adb9SVladimir Kondratiev } 8948bf6adb9SVladimir Kondratiev 89552a45702SLior David wil_rx_buf_len_init(wil); 89652a45702SLior David 897d3762b40SVladimir Kondratiev vring->size = size; 89896c93589SGidon Studinski vring->is_rx = true; 8992be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9002be7d22fSVladimir Kondratiev if (rc) 9012be7d22fSVladimir Kondratiev return rc; 9022be7d22fSVladimir Kondratiev 90347e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 9042be7d22fSVladimir Kondratiev if (rc) 9052be7d22fSVladimir Kondratiev goto err_free; 9062be7d22fSVladimir Kondratiev 9072be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 9082be7d22fSVladimir Kondratiev if (rc) 9092be7d22fSVladimir Kondratiev goto err_free; 9102be7d22fSVladimir Kondratiev 9112be7d22fSVladimir Kondratiev return 0; 9122be7d22fSVladimir Kondratiev err_free: 91396c93589SGidon Studinski wil_vring_free(wil, vring); 9142be7d22fSVladimir Kondratiev 9152be7d22fSVladimir Kondratiev return rc; 9162be7d22fSVladimir Kondratiev } 9172be7d22fSVladimir Kondratiev 91896c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 9192be7d22fSVladimir Kondratiev { 92010590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 9212be7d22fSVladimir Kondratiev 922af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 9239cf10d62SVladimir Kondratiev 9242acb4220SVladimir Kondratiev if (vring->va) 92596c93589SGidon Studinski wil_vring_free(wil, vring); 9262be7d22fSVladimir Kondratiev } 9272be7d22fSVladimir Kondratiev 9289202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 9299202d7b6SMaya Erez u32 len, int vring_index) 9309202d7b6SMaya Erez { 9319202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 9329202d7b6SMaya Erez 9339202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 9349202d7b6SMaya Erez d->dma.ip_length = 0; 9359202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 9369202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 9379202d7b6SMaya Erez d->dma.error = 0; 9389202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 9399202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 9409202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 9419202d7b6SMaya Erez d->mac.d[0] = 0; 9429202d7b6SMaya Erez d->mac.d[1] = 0; 9439202d7b6SMaya Erez d->mac.d[2] = 0; 9449202d7b6SMaya Erez d->mac.ucode_cmd = 0; 9459202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 9469202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 9479202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 9489202d7b6SMaya Erez 9499202d7b6SMaya Erez return 0; 9509202d7b6SMaya Erez } 9519202d7b6SMaya Erez 95296c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 953875e9439SMaya Erez { 954875e9439SMaya Erez spin_lock_bh(&txdata->lock); 955875e9439SMaya Erez txdata->dot1x_open = 0; 956875e9439SMaya Erez txdata->enabled = 0; 957875e9439SMaya Erez txdata->idle = 0; 958875e9439SMaya Erez txdata->last_idle = 0; 959875e9439SMaya Erez txdata->begin = 0; 960875e9439SMaya Erez txdata->agg_wsize = 0; 961875e9439SMaya Erez txdata->agg_timeout = 0; 962875e9439SMaya Erez txdata->agg_amsdu = 0; 963875e9439SMaya Erez txdata->addba_in_progress = false; 964e00243faSLior David txdata->mid = U8_MAX; 965875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 966875e9439SMaya Erez } 967875e9439SMaya Erez 96896c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9692be7d22fSVladimir Kondratiev int cid, int tid) 9702be7d22fSVladimir Kondratiev { 971e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9722be7d22fSVladimir Kondratiev int rc; 9732be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9742be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9752be7d22fSVladimir Kondratiev .vring_cfg = { 9762be7d22fSVladimir Kondratiev .tx_sw_ring = { 9779a06bec9SVladimir Kondratiev .max_mpdu_size = 978c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 979b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9802be7d22fSVladimir Kondratiev }, 9812be7d22fSVladimir Kondratiev .ringid = id, 982a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9832be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9842be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9852be7d22fSVladimir Kondratiev .to_resolution = 0, 9863277213fSVladimir Kondratiev .agg_max_wsize = 0, 9872be7d22fSVladimir Kondratiev .schd_params = { 9882be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9892be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9902be7d22fSVladimir Kondratiev }, 9912be7d22fSVladimir Kondratiev }, 9922be7d22fSVladimir Kondratiev }; 9932be7d22fSVladimir Kondratiev struct { 994b874ddecSLior David struct wmi_cmd_hdr wmi; 9952be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 996807b0860SAlexei Avshalom Lazar } __packed reply = { 997807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 998807b0860SAlexei Avshalom Lazar }; 99910590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 100010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 10012be7d22fSVladimir Kondratiev 1002af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 1003e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10049b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 10059cf10d62SVladimir Kondratiev 10062be7d22fSVladimir Kondratiev if (vring->va) { 10072be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 10082be7d22fSVladimir Kondratiev rc = -EINVAL; 10092be7d22fSVladimir Kondratiev goto out; 10102be7d22fSVladimir Kondratiev } 10112be7d22fSVladimir Kondratiev 1012875e9439SMaya Erez wil_tx_data_init(txdata); 101396c93589SGidon Studinski vring->is_rx = false; 10142be7d22fSVladimir Kondratiev vring->size = size; 10152be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 10162be7d22fSVladimir Kondratiev if (rc) 10172be7d22fSVladimir Kondratiev goto out; 10182be7d22fSVladimir Kondratiev 101910590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 102010590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 102193ae6d49SVladimir Kondratiev 10222be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 10232be7d22fSVladimir Kondratiev 1024e00243faSLior David if (!vif->privacy) 1025230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1026e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 10272be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 10282be7d22fSVladimir Kondratiev if (rc) 10292be7d22fSVladimir Kondratiev goto out_free; 10302be7d22fSVladimir Kondratiev 1031b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 10322be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 10332be7d22fSVladimir Kondratiev reply.cmd.status); 1034c331997bSVladimir Kondratiev rc = -EINVAL; 10352be7d22fSVladimir Kondratiev goto out_free; 10362be7d22fSVladimir Kondratiev } 10372be7d22fSVladimir Kondratiev 1038dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1039dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1040e00243faSLior David txdata->mid = vif->mid; 1041097638a0SVladimir Kondratiev txdata->enabled = 1; 1042dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1043dc90506fSMaya Erez 1044230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 10453a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1046097638a0SVladimir Kondratiev 10472be7d22fSVladimir Kondratiev return 0; 10482be7d22fSVladimir Kondratiev out_free: 1049875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1050230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1051230d8442SVladimir Kondratiev txdata->enabled = 0; 1052875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 105396c93589SGidon Studinski wil_vring_free(wil, vring); 105410590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 105510590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 10560916d9f2SMaya Erez 10572be7d22fSVladimir Kondratiev out: 10582be7d22fSVladimir Kondratiev 10592be7d22fSVladimir Kondratiev return rc; 10602be7d22fSVladimir Kondratiev } 10612be7d22fSVladimir Kondratiev 1062e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 106341d6b093SVladimir Kondratiev { 1064e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 106541d6b093SVladimir Kondratiev int rc; 106641d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 106741d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 106841d6b093SVladimir Kondratiev .vring_cfg = { 106941d6b093SVladimir Kondratiev .tx_sw_ring = { 107041d6b093SVladimir Kondratiev .max_mpdu_size = 107141d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 107241d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 107341d6b093SVladimir Kondratiev }, 107441d6b093SVladimir Kondratiev .ringid = id, 107541d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 107641d6b093SVladimir Kondratiev }, 107741d6b093SVladimir Kondratiev }; 107841d6b093SVladimir Kondratiev struct { 1079b874ddecSLior David struct wmi_cmd_hdr wmi; 108041d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1081807b0860SAlexei Avshalom Lazar } __packed reply = { 1082807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1083807b0860SAlexei Avshalom Lazar }; 108410590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 108510590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 108641d6b093SVladimir Kondratiev 1087af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 108841d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10899b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 109041d6b093SVladimir Kondratiev 109141d6b093SVladimir Kondratiev if (vring->va) { 109241d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 109341d6b093SVladimir Kondratiev rc = -EINVAL; 109441d6b093SVladimir Kondratiev goto out; 109541d6b093SVladimir Kondratiev } 109641d6b093SVladimir Kondratiev 1097875e9439SMaya Erez wil_tx_data_init(txdata); 109896c93589SGidon Studinski vring->is_rx = false; 109941d6b093SVladimir Kondratiev vring->size = size; 110041d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 110141d6b093SVladimir Kondratiev if (rc) 110241d6b093SVladimir Kondratiev goto out; 110341d6b093SVladimir Kondratiev 110410590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 110510590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 110641d6b093SVladimir Kondratiev 110741d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 110841d6b093SVladimir Kondratiev 1109e00243faSLior David if (!vif->privacy) 1110230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1111e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1112e00243faSLior David &cmd, sizeof(cmd), 111341d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 111441d6b093SVladimir Kondratiev if (rc) 111541d6b093SVladimir Kondratiev goto out_free; 111641d6b093SVladimir Kondratiev 111741d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 111841d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 111941d6b093SVladimir Kondratiev reply.cmd.status); 112041d6b093SVladimir Kondratiev rc = -EINVAL; 112141d6b093SVladimir Kondratiev goto out_free; 112241d6b093SVladimir Kondratiev } 112341d6b093SVladimir Kondratiev 1124dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1125dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1126e00243faSLior David txdata->mid = vif->mid; 112741d6b093SVladimir Kondratiev txdata->enabled = 1; 1128dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 112941d6b093SVladimir Kondratiev 113041d6b093SVladimir Kondratiev return 0; 113141d6b093SVladimir Kondratiev out_free: 1132875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1133230d8442SVladimir Kondratiev txdata->enabled = 0; 1134230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1135875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 113696c93589SGidon Studinski wil_vring_free(wil, vring); 113741d6b093SVladimir Kondratiev out: 113841d6b093SVladimir Kondratiev 113941d6b093SVladimir Kondratiev return rc; 114041d6b093SVladimir Kondratiev } 114141d6b093SVladimir Kondratiev 114210590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1143e00243faSLior David struct wil6210_vif *vif, 11442be7d22fSVladimir Kondratiev struct sk_buff *skb) 11452be7d22fSVladimir Kondratiev { 11463df2cd36SVladimir Kondratiev int i; 11473df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1148e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 114996c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 11502be7d22fSVladimir Kondratiev 11513df2cd36SVladimir Kondratiev if (cid < 0) 11523df2cd36SVladimir Kondratiev return NULL; 11533df2cd36SVladimir Kondratiev 11543df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 115596c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 115610590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 115710590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1158230d8442SVladimir Kondratiev continue; 115910590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 116010590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 116110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11628fe59627SVladimir Kondratiev 1163af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1164af3db60aSLazar Alexei eth->h_dest, i); 1165b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11662be7d22fSVladimir Kondratiev return v; 11673df2cd36SVladimir Kondratiev } else { 1168af3db60aSLazar Alexei wil_dbg_txrx(wil, 1169af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1170af3db60aSLazar Alexei i); 11713df2cd36SVladimir Kondratiev return NULL; 11723df2cd36SVladimir Kondratiev } 11733df2cd36SVladimir Kondratiev } 11743df2cd36SVladimir Kondratiev } 11752be7d22fSVladimir Kondratiev 11762be7d22fSVladimir Kondratiev return NULL; 11772be7d22fSVladimir Kondratiev } 11782be7d22fSVladimir Kondratiev 11799202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 11809202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 118154ed90a8SVladimir Kondratiev 118210590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1183e00243faSLior David struct wil6210_vif *vif, 118454ed90a8SVladimir Kondratiev struct sk_buff *skb) 118554ed90a8SVladimir Kondratiev { 118610590c6aSGidon Studinski struct wil_ring *ring; 118754ed90a8SVladimir Kondratiev int i; 118854ed90a8SVladimir Kondratiev u8 cid; 118910590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 119096c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 119154ed90a8SVladimir Kondratiev 119254ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 119354ed90a8SVladimir Kondratiev * for the AP we connected to. 1194230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 119554ed90a8SVladimir Kondratiev */ 119696c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 119710590c6aSGidon Studinski ring = &wil->ring_tx[i]; 119810590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 119910590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 120054ed90a8SVladimir Kondratiev continue; 120154ed90a8SVladimir Kondratiev 120210590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 120341d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 120441d6b093SVladimir Kondratiev continue; 120541d6b093SVladimir Kondratiev 120610590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 120710590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1208230d8442SVladimir Kondratiev continue; 120954ed90a8SVladimir Kondratiev 121054ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 121154ed90a8SVladimir Kondratiev 121210590c6aSGidon Studinski return ring; 121354ed90a8SVladimir Kondratiev } 121454ed90a8SVladimir Kondratiev 121510590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 121654ed90a8SVladimir Kondratiev 121754ed90a8SVladimir Kondratiev return NULL; 121854ed90a8SVladimir Kondratiev } 121954ed90a8SVladimir Kondratiev 122070812421SVladimir Kondratiev /* Use one of 2 strategies: 122170812421SVladimir Kondratiev * 122270812421SVladimir Kondratiev * 1. New (real broadcast): 122370812421SVladimir Kondratiev * use dedicated broadcast vring 122470812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 122570812421SVladimir Kondratiev * Find 1-st vring and return it; 122670812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 122770812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 122870812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 122970812421SVladimir Kondratiev * - for PBSS 123070812421SVladimir Kondratiev */ 123110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1232e00243faSLior David struct wil6210_vif *vif, 1233fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1234fb3cac57SVladimir Kondratiev { 123510590c6aSGidon Studinski struct wil_ring *v; 123610590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 123710590c6aSGidon Studinski int i = vif->bcast_ring; 1238fb3cac57SVladimir Kondratiev 123941d6b093SVladimir Kondratiev if (i < 0) 124041d6b093SVladimir Kondratiev return NULL; 124110590c6aSGidon Studinski v = &wil->ring_tx[i]; 124210590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1243b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1244fb3cac57SVladimir Kondratiev return NULL; 124510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 124610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1247230d8442SVladimir Kondratiev return NULL; 1248fb3cac57SVladimir Kondratiev 1249fb3cac57SVladimir Kondratiev return v; 1250fb3cac57SVladimir Kondratiev } 1251fb3cac57SVladimir Kondratiev 125270812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 125370812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 125470812421SVladimir Kondratiev { 125570812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 125610590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 125770812421SVladimir Kondratiev 125870812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 125970812421SVladimir Kondratiev } 126070812421SVladimir Kondratiev 126110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1262e00243faSLior David struct wil6210_vif *vif, 126370812421SVladimir Kondratiev struct sk_buff *skb) 126470812421SVladimir Kondratiev { 126510590c6aSGidon Studinski struct wil_ring *v, *v2; 126670812421SVladimir Kondratiev struct sk_buff *skb2; 126770812421SVladimir Kondratiev int i; 126870812421SVladimir Kondratiev u8 cid; 126970812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 127070812421SVladimir Kondratiev char *src = eth->h_source; 127110590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 127296c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 127370812421SVladimir Kondratiev 127470812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 127596c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 127610590c6aSGidon Studinski v = &wil->ring_tx[i]; 127710590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1278e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 127970812421SVladimir Kondratiev continue; 128070812421SVladimir Kondratiev 128110590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 128270812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 128370812421SVladimir Kondratiev continue; 128410590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 128510590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 128670812421SVladimir Kondratiev continue; 128770812421SVladimir Kondratiev 128870812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 128970812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 129070812421SVladimir Kondratiev continue; 129170812421SVladimir Kondratiev 129270812421SVladimir Kondratiev goto found; 129370812421SVladimir Kondratiev } 129470812421SVladimir Kondratiev 129570812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 129670812421SVladimir Kondratiev 129770812421SVladimir Kondratiev return NULL; 129870812421SVladimir Kondratiev 129970812421SVladimir Kondratiev found: 130070812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 130170812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 130270812421SVladimir Kondratiev 130370812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 130470812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 130510590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 130610590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1307e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 130870812421SVladimir Kondratiev continue; 130910590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 131070812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 131170812421SVladimir Kondratiev continue; 131210590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 131310590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 131470812421SVladimir Kondratiev continue; 131570812421SVladimir Kondratiev 131670812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 131770812421SVladimir Kondratiev continue; 131870812421SVladimir Kondratiev 131970812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 132070812421SVladimir Kondratiev if (skb2) { 132170812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 132270812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 13239202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 132470812421SVladimir Kondratiev } else { 132570812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 132670812421SVladimir Kondratiev } 132770812421SVladimir Kondratiev } 132870812421SVladimir Kondratiev 132970812421SVladimir Kondratiev return v; 133070812421SVladimir Kondratiev } 133170812421SVladimir Kondratiev 1332c236658fSVladimir Kondratiev static inline 1333c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1334c236658fSVladimir Kondratiev { 13353d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1336c236658fSVladimir Kondratiev } 1337c236658fSVladimir Kondratiev 13383d4bde15SVladimir Kondratiev /** 13393d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13403d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13413d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13423d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13433d4bde15SVladimir Kondratiev */ 13443d4bde15SVladimir Kondratiev 13453d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13463d4bde15SVladimir Kondratiev struct sk_buff *skb, 13473d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13483d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1349504937d4SKirshenbaum Erez { 13503d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13513d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13523d4bde15SVladimir Kondratiev 13533d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13543d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13553d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13563d4bde15SVladimir Kondratiev 13573d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13583d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13593d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13603d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13613d4bde15SVladimir Kondratiev 13623d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13633d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13643d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13653d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13663d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13673d4bde15SVladimir Kondratiev } 13683d4bde15SVladimir Kondratiev 13693d4bde15SVladimir Kondratiev /** 13703d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13713d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13723d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13733d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13743d4bde15SVladimir Kondratiev * 13753d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13763d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13773d4bde15SVladimir Kondratiev */ 13783d4bde15SVladimir Kondratiev 13793d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13803d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1381504937d4SKirshenbaum Erez int protocol; 1382504937d4SKirshenbaum Erez 1383504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1384504937d4SKirshenbaum Erez return 0; 1385504937d4SKirshenbaum Erez 1386df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1387df2d08eeSVladimir Kondratiev 1388504937d4SKirshenbaum Erez switch (skb->protocol) { 1389504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1390504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1391df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1392504937d4SKirshenbaum Erez break; 1393504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1394504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1395504937d4SKirshenbaum Erez break; 1396504937d4SKirshenbaum Erez default: 1397504937d4SKirshenbaum Erez return -EINVAL; 1398504937d4SKirshenbaum Erez } 1399504937d4SKirshenbaum Erez 1400504937d4SKirshenbaum Erez switch (protocol) { 1401504937d4SKirshenbaum Erez case IPPROTO_TCP: 1402504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1403504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1404504937d4SKirshenbaum Erez d->dma.d0 |= 1405504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1406504937d4SKirshenbaum Erez break; 1407504937d4SKirshenbaum Erez case IPPROTO_UDP: 1408504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1409504937d4SKirshenbaum Erez d->dma.d0 |= 1410504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1411504937d4SKirshenbaum Erez break; 1412504937d4SKirshenbaum Erez default: 1413504937d4SKirshenbaum Erez return -EINVAL; 1414504937d4SKirshenbaum Erez } 1415504937d4SKirshenbaum Erez 1416504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1417504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1418504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1419504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1420504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1421504937d4SKirshenbaum Erez 1422504937d4SKirshenbaum Erez return 0; 1423504937d4SKirshenbaum Erez } 1424504937d4SKirshenbaum Erez 14253d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14263d4bde15SVladimir Kondratiev { 14273d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14283d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14293d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14303d4bde15SVladimir Kondratiev } 14313d4bde15SVladimir Kondratiev 14323d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14333d4bde15SVladimir Kondratiev { 14343d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14353d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14363d4bde15SVladimir Kondratiev } 14373d4bde15SVladimir Kondratiev 1438e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 143910590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 14403d4bde15SVladimir Kondratiev { 14413d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14423d4bde15SVladimir Kondratiev 14433d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14443d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14453d4bde15SVladimir Kondratiev *_first_desc = NULL; 14463d4bde15SVladimir Kondratiev 14473d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14483d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14493d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14503d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14513d4bde15SVladimir Kondratiev 14523d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14533d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14543d4bde15SVladimir Kondratiev 14553d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14563d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14573d4bde15SVladimir Kondratiev 14583d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 145910590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14603d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14613d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14623d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14633d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 146410590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 146510590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14663d4bde15SVladimir Kondratiev uint i = swhead; 14673d4bde15SVladimir Kondratiev dma_addr_t pa; 14683d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14693d4bde15SVladimir Kondratiev int rem_data = mss; 14703d4bde15SVladimir Kondratiev int lenmss; 14713d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14723d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14733d4bde15SVladimir Kondratiev bool is_ipv4; 14743d4bde15SVladimir Kondratiev int tcp_hdr_len; 14753d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14763d4bde15SVladimir Kondratiev int gso_type; 1477e3d2ed94SHamad Kadmany int rc = -EINVAL; 14783d4bde15SVladimir Kondratiev 1479af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1480af3db60aSLazar Alexei vring_index); 14813d4bde15SVladimir Kondratiev 14823d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14833d4bde15SVladimir Kondratiev return -EINVAL; 14843d4bde15SVladimir Kondratiev 14853d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14863d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14873d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14883d4bde15SVladimir Kondratiev * this is the initial check only. 14893d4bde15SVladimir Kondratiev */ 14903d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14913d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14923d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14933d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14943d4bde15SVladimir Kondratiev return -ENOMEM; 14953d4bde15SVladimir Kondratiev } 14963d4bde15SVladimir Kondratiev 14973d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14983d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14993d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 15003d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 15013d4bde15SVladimir Kondratiev 15023d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 15033d4bde15SVladimir Kondratiev switch (gso_type) { 15043d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 15053d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 15063d4bde15SVladimir Kondratiev * as required by the offloading doc 15073d4bde15SVladimir Kondratiev */ 15083d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 15093d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 15103d4bde15SVladimir Kondratiev is_ipv4 = true; 15113d4bde15SVladimir Kondratiev break; 15123d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 15133d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15143d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15153d4bde15SVladimir Kondratiev is_ipv4 = false; 15163d4bde15SVladimir Kondratiev break; 15173d4bde15SVladimir Kondratiev default: 15183d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15193d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15203d4bde15SVladimir Kondratiev */ 15213d4bde15SVladimir Kondratiev return -EINVAL; 15223d4bde15SVladimir Kondratiev } 15233d4bde15SVladimir Kondratiev 15243d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15253d4bde15SVladimir Kondratiev return -EINVAL; 15263d4bde15SVladimir Kondratiev 15273d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15283d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15293d4bde15SVladimir Kondratiev */ 15303d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15313d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15323d4bde15SVladimir Kondratiev 153310590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 15343d4bde15SVladimir Kondratiev 15353d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15363d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15373d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15383d4bde15SVladimir Kondratiev goto err_exit; 15393d4bde15SVladimir Kondratiev } 15403d4bde15SVladimir Kondratiev 15419202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 15429202d7b6SMaya Erez hdrlen, vring_index); 15433d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15443d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15453d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15463d4bde15SVladimir Kondratiev 15473d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15483d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15493d4bde15SVladimir Kondratiev 15503d4bde15SVladimir Kondratiev descs_used++; 15513d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15523d4bde15SVladimir Kondratiev 15533d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15543d4bde15SVladimir Kondratiev if (headlen) { 15553d4bde15SVladimir Kondratiev len = headlen; 15563d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15573d4bde15SVladimir Kondratiev len); 15583d4bde15SVladimir Kondratiev } else { 15593d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15603d4bde15SVladimir Kondratiev len = frag->size; 15613d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15623d4bde15SVladimir Kondratiev } 15633d4bde15SVladimir Kondratiev 15643d4bde15SVladimir Kondratiev while (len) { 15653d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15663d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15673d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15683d4bde15SVladimir Kondratiev 15693d4bde15SVladimir Kondratiev if (descs_used == avail) { 1570e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1571e3d2ed94SHamad Kadmany rc = -ENOMEM; 1572e3d2ed94SHamad Kadmany goto mem_error; 15733d4bde15SVladimir Kondratiev } 15743d4bde15SVladimir Kondratiev 15753d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15763d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15773d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15783d4bde15SVladimir Kondratiev 15793d4bde15SVladimir Kondratiev if (!headlen) { 15803d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15813d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15823d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15833d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15843d4bde15SVladimir Kondratiev } else { 15853d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15863d4bde15SVladimir Kondratiev skb->data + 15873d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15883d4bde15SVladimir Kondratiev lenmss, 15893d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15903d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15913d4bde15SVladimir Kondratiev headlen -= lenmss; 15923d4bde15SVladimir Kondratiev } 15933d4bde15SVladimir Kondratiev 1594e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1595e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1596e3d2ed94SHamad Kadmany goto mem_error; 1597e3d2ed94SHamad Kadmany } 15983d4bde15SVladimir Kondratiev 159910590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 16003d4bde15SVladimir Kondratiev 16013d4bde15SVladimir Kondratiev if (!_first_desc) { 16023d4bde15SVladimir Kondratiev _first_desc = _desc; 16033d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 16043d4bde15SVladimir Kondratiev d = first_desc; 16053d4bde15SVladimir Kondratiev } else { 16063d4bde15SVladimir Kondratiev d = &desc_mem; 16073d4bde15SVladimir Kondratiev } 16083d4bde15SVladimir Kondratiev 16099202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 16109202d7b6SMaya Erez pa, lenmss, vring_index); 16113d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 16123d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 16133d4bde15SVladimir Kondratiev skb_net_hdr_len); 16143d4bde15SVladimir Kondratiev 16153d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16163d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16173d4bde15SVladimir Kondratiev 16183d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16193d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16203d4bde15SVladimir Kondratiev len -= lenmss; 16213d4bde15SVladimir Kondratiev rem_data -= lenmss; 16223d4bde15SVladimir Kondratiev 16233d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16243d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16253d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16263d4bde15SVladimir Kondratiev 16273d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16283d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16293d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16303d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16313d4bde15SVladimir Kondratiev * release 16323d4bde15SVladimir Kondratiev */ 16333d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16343d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16353d4bde15SVladimir Kondratiev sg_desc_cnt + 16363d4bde15SVladimir Kondratiev 1); 16373d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16383d4bde15SVladimir Kondratiev } else { 16393d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16403d4bde15SVladimir Kondratiev sg_desc_cnt); 16413d4bde15SVladimir Kondratiev } 16423d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16433d4bde15SVladimir Kondratiev 16443d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16453d4bde15SVladimir Kondratiev 16463d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16473d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16483d4bde15SVladimir Kondratiev * it twice 16493d4bde15SVladimir Kondratiev */ 16503d4bde15SVladimir Kondratiev if (first_desc != d) 16513d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16523d4bde15SVladimir Kondratiev 16533d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16543d4bde15SVladimir Kondratiev * of this TS processing 16553d4bde15SVladimir Kondratiev */ 16563d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16573d4bde15SVladimir Kondratiev *_desc = *d; 16583d4bde15SVladimir Kondratiev 16593d4bde15SVladimir Kondratiev rem_data = mss; 16603d4bde15SVladimir Kondratiev _first_desc = NULL; 16613d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16623d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16633d4bde15SVladimir Kondratiev *_desc = *d; 16643d4bde15SVladimir Kondratiev } 16653d4bde15SVladimir Kondratiev } 16663d4bde15SVladimir Kondratiev 16673d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16683d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16693d4bde15SVladimir Kondratiev */ 16703d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16713d4bde15SVladimir Kondratiev d = first_desc; 16723d4bde15SVladimir Kondratiev 16733d4bde15SVladimir Kondratiev /* Last data descriptor */ 16743d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16753d4bde15SVladimir Kondratiev *_desc = *d; 16763d4bde15SVladimir Kondratiev 16773d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16783d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16793d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16803d4bde15SVladimir Kondratiev 16813d4bde15SVladimir Kondratiev /* hold reference to skb 16823d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16833d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16843d4bde15SVladimir Kondratiev */ 16853d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16863d4bde15SVladimir Kondratiev 16873d4bde15SVladimir Kondratiev /* performance monitoring */ 168810590c6aSGidon Studinski used = wil_ring_used_tx(vring); 168910590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 16903d4bde15SVladimir Kondratiev used, used + descs_used)) { 16913d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16923d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16933d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16943d4bde15SVladimir Kondratiev } 16953d4bde15SVladimir Kondratiev 1696eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1697eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1698eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1699eb26cff1SMaya Erez * skb before it was completed. 1700eb26cff1SMaya Erez */ 1701eb26cff1SMaya Erez wmb(); 1702eb26cff1SMaya Erez 17033d4bde15SVladimir Kondratiev /* advance swhead */ 170410590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1705e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 17063d4bde15SVladimir Kondratiev 17073d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17083d4bde15SVladimir Kondratiev * committing them to HW 17093d4bde15SVladimir Kondratiev */ 17103d4bde15SVladimir Kondratiev wmb(); 17113d4bde15SVladimir Kondratiev 1712a24a3d6aSDedy Lansky if (wil->tx_latency) 1713a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1714a24a3d6aSDedy Lansky else 1715a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1716a24a3d6aSDedy Lansky 1717b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17183d4bde15SVladimir Kondratiev return 0; 17193d4bde15SVladimir Kondratiev 1720e3d2ed94SHamad Kadmany mem_error: 17213d4bde15SVladimir Kondratiev while (descs_used > 0) { 17223d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17233d4bde15SVladimir Kondratiev 1724a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 172510590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 172610590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 17273d4bde15SVladimir Kondratiev *d = *_desc; 17283d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17293d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17309202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 17313d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17323d4bde15SVladimir Kondratiev descs_used--; 17333d4bde15SVladimir Kondratiev } 17343d4bde15SVladimir Kondratiev err_exit: 1735e3d2ed94SHamad Kadmany return rc; 17363d4bde15SVladimir Kondratiev } 17373d4bde15SVladimir Kondratiev 17389202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 17399202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 17402be7d22fSVladimir Kondratiev { 17412be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 174268ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 174368ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17449202d7b6SMaya Erez u32 swhead = ring->swhead; 17459202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 17462be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1747504937d4SKirshenbaum Erez uint f = 0; 17489202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 17499202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 17502be7d22fSVladimir Kondratiev uint i = swhead; 17512be7d22fSVladimir Kondratiev dma_addr_t pa; 17520436fd9aSVladimir Shulman int used; 17539202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 175441d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17552be7d22fSVladimir Kondratiev 175610590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 17579202d7b6SMaya Erez skb->len, ring_index, nr_frags); 17582be7d22fSVladimir Kondratiev 17595933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17605933a06dSVladimir Kondratiev return -EINVAL; 17615933a06dSVladimir Kondratiev 176233c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 176370801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17645b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17659202d7b6SMaya Erez ring_index, 1 + nr_frags); 17662be7d22fSVladimir Kondratiev return -ENOMEM; 17672be7d22fSVladimir Kondratiev } 17689202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17692be7d22fSVladimir Kondratiev 17708fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17712be7d22fSVladimir Kondratiev 17729202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 17735b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17747743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17752be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17762be7d22fSVladimir Kondratiev 17772be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17782be7d22fSVladimir Kondratiev return -EINVAL; 17799202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 17802be7d22fSVladimir Kondratiev /* 1-st segment */ 17819202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 17829202d7b6SMaya Erez ring_index); 178341d6b093SVladimir Kondratiev if (unlikely(mcast)) { 178441d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1785230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 178641d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 178741d6b093SVladimir Kondratiev } 1788504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17893d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17905b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 17919202d7b6SMaya Erez ring_index); 1792504937d4SKirshenbaum Erez goto dma_error; 1793504937d4SKirshenbaum Erez } 1794504937d4SKirshenbaum Erez 17959202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 17963d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 179768ada71eSVladimir Kondratiev 17982be7d22fSVladimir Kondratiev /* middle segments */ 1799504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 18002be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 18012be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 18022be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 18038fe59627SVladimir Kondratiev 1804e59d16c0SVladimir Kondratiev *_d = *d; 18059202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18065b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18075b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18089202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 18099202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 18102be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 18112be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1812e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1813e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 18149202d7b6SMaya Erez ring_index); 18152be7d22fSVladimir Kondratiev goto dma_error; 1816e3d2ed94SHamad Kadmany } 18179202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 18189202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 18199202d7b6SMaya Erez pa, len, ring_index); 1820c236658fSVladimir Kondratiev /* no need to check return code - 1821c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1822c236658fSVladimir Kondratiev * it will succeed here too 1823c236658fSVladimir Kondratiev */ 18243d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18252be7d22fSVladimir Kondratiev } 18262be7d22fSVladimir Kondratiev /* for the last seg only */ 18272be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1828668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18292be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 183068ada71eSVladimir Kondratiev *_d = *d; 18319202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18325b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18335b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18342be7d22fSVladimir Kondratiev 18356cdadd4dSVladimir Kondratiev /* hold reference to skb 18366cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18376cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18386cdadd4dSVladimir Kondratiev */ 18399202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 18406cdadd4dSVladimir Kondratiev 18410436fd9aSVladimir Shulman /* performance monitoring */ 18429202d7b6SMaya Erez used = wil_ring_used_tx(ring); 184310590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 18440436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18457c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18460436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18479202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 18480436fd9aSVladimir Shulman } 18497c0acf86SVladimir Kondratiev 1850eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1851eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1852eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1853eb26cff1SMaya Erez * skb before it was completed. 1854eb26cff1SMaya Erez */ 1855eb26cff1SMaya Erez wmb(); 1856eb26cff1SMaya Erez 18572be7d22fSVladimir Kondratiev /* advance swhead */ 18589202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 18599202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 18609202d7b6SMaya Erez ring->swhead); 18619202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 18623d4bde15SVladimir Kondratiev 18633d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18643d4bde15SVladimir Kondratiev * committing them to HW 18653d4bde15SVladimir Kondratiev */ 18663d4bde15SVladimir Kondratiev wmb(); 18673d4bde15SVladimir Kondratiev 1868a24a3d6aSDedy Lansky if (wil->tx_latency) 1869a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1870a24a3d6aSDedy Lansky else 1871a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1872a24a3d6aSDedy Lansky 18739202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 18742be7d22fSVladimir Kondratiev 18752be7d22fSVladimir Kondratiev return 0; 18762be7d22fSVladimir Kondratiev dma_error: 18772be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1878c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1879c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1880c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18817e594444SVladimir Kondratiev 18829202d7b6SMaya Erez i = (swhead + f) % ring->size; 18839202d7b6SMaya Erez ctx = &ring->ctx[i]; 18849202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 188568ada71eSVladimir Kondratiev *d = *_d; 188668ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18879202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 18889202d7b6SMaya Erez (union wil_tx_desc *)d, 18899202d7b6SMaya Erez ctx); 1890f88f113aSVladimir Kondratiev 1891f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18922be7d22fSVladimir Kondratiev } 18932be7d22fSVladimir Kondratiev 18942be7d22fSVladimir Kondratiev return -EINVAL; 18952be7d22fSVladimir Kondratiev } 18962be7d22fSVladimir Kondratiev 18979202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 18989202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 18995933a06dSVladimir Kondratiev { 19009202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 190110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 19025933a06dSVladimir Kondratiev int rc; 19035933a06dSVladimir Kondratiev 19045933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 19053d4bde15SVladimir Kondratiev 1906fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1907fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1908fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1909fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1910fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1911fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1912fe9ee51eSMaya Erez return -EINVAL; 1913fe9ee51eSMaya Erez } 1914fe9ee51eSMaya Erez 19159202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 19169202d7b6SMaya Erez (wil, vif, ring, skb); 19173d4bde15SVladimir Kondratiev 19185933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 19193d4bde15SVladimir Kondratiev 19205933a06dSVladimir Kondratiev return rc; 19215933a06dSVladimir Kondratiev } 19225933a06dSVladimir Kondratiev 1923f9e3033fSDedy Lansky /** 1924f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 19255bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1926f9e3033fSDedy Lansky * 1927f9e3033fSDedy Lansky * This function does one of two checks: 1928f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1929f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1930f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1931f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1932f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1933f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1934f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1935f9e3033fSDedy Lansky * 1936f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1937f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1938f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1939f9e3033fSDedy Lansky */ 1940f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 19415bd60982SLior David struct wil6210_vif *vif, 194210590c6aSGidon Studinski struct wil_ring *ring, 1943f9e3033fSDedy Lansky bool check_stop) 1944f9e3033fSDedy Lansky { 1945f9e3033fSDedy Lansky int i; 1946df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 1947f9e3033fSDedy Lansky 19485bd60982SLior David if (unlikely(!vif)) 19495bd60982SLior David return; 1950f9e3033fSDedy Lansky 195110590c6aSGidon Studinski if (ring) 19525bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 195310590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19545bd60982SLior David vif->net_queue_stopped); 19555bd60982SLior David else 19565bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19575bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19585bd60982SLior David 19595bd60982SLior David if (check_stop == vif->net_queue_stopped) 1960f9e3033fSDedy Lansky /* net queues already in desired state */ 1961f9e3033fSDedy Lansky return; 1962f9e3033fSDedy Lansky 1963f9e3033fSDedy Lansky if (check_stop) { 196410590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1965f9e3033fSDedy Lansky /* not enough room in the vring */ 19665bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19675bd60982SLior David vif->net_queue_stopped = true; 1968f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1969f9e3033fSDedy Lansky } 1970f9e3033fSDedy Lansky return; 1971f9e3033fSDedy Lansky } 1972f9e3033fSDedy Lansky 1973fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1974fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1975fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1976fe9ee51eSMaya Erez return; 1977fe9ee51eSMaya Erez 1978f9e3033fSDedy Lansky /* check wake */ 1979df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 198010590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 198110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 1982f9e3033fSDedy Lansky 198310590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 198410590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 1985f9e3033fSDedy Lansky continue; 1986f9e3033fSDedy Lansky 198710590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 198810590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 198910590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 1990f9e3033fSDedy Lansky return; 1991f9e3033fSDedy Lansky } 1992f9e3033fSDedy Lansky } 1993f9e3033fSDedy Lansky 199410590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 199510590c6aSGidon Studinski /* enough room in the ring */ 1996f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 19975bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 19985bd60982SLior David vif->net_queue_stopped = false; 1999f9e3033fSDedy Lansky } 2000f9e3033fSDedy Lansky } 2001f9e3033fSDedy Lansky 20025bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 200310590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2004f9e3033fSDedy Lansky { 2005f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 200610590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2007f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2008f9e3033fSDedy Lansky } 2009f9e3033fSDedy Lansky 20105bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 201110590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2012f9e3033fSDedy Lansky { 2013f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 201410590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2015f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2016f9e3033fSDedy Lansky } 2017f9e3033fSDedy Lansky 20182be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 20192be7d22fSVladimir Kondratiev { 2020e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2021e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 20223df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 202341d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 20249202d7b6SMaya Erez struct wil_ring *ring; 2025aa27deaaSVladimir Kondratiev static bool pr_once_fw; 20262be7d22fSVladimir Kondratiev int rc; 20272be7d22fSVladimir Kondratiev 2028af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 202933c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2030aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20312be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2032aa27deaaSVladimir Kondratiev pr_once_fw = true; 2033aa27deaaSVladimir Kondratiev } 20342be7d22fSVladimir Kondratiev goto drop; 20352be7d22fSVladimir Kondratiev } 20365bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 20375bd60982SLior David wil_dbg_ratelimited(wil, 20385bd60982SLior David "VIF not connected, packet dropped\n"); 20392be7d22fSVladimir Kondratiev goto drop; 20402be7d22fSVladimir Kondratiev } 2041e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20422be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20432be7d22fSVladimir Kondratiev goto drop; 20442be7d22fSVladimir Kondratiev } 2045aa27deaaSVladimir Kondratiev pr_once_fw = false; 2046d58db4e4SVladimir Kondratiev 20472be7d22fSVladimir Kondratiev /* find vring */ 2048e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2049a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 20509202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2051a895cb8bSLior David } else if (bcast) { 2052e00243faSLior David if (vif->pbss) 2053a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2054a895cb8bSLior David * all stations VRINGs 2055a895cb8bSLior David */ 20569202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2057e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2058a895cb8bSLior David /* AP has a dedicated bcast VRING */ 20599202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2060a895cb8bSLior David else 2061a895cb8bSLior David /* unexpected combination, fallback to duplicating 2062a895cb8bSLior David * the skb in all stations VRINGs 2063a895cb8bSLior David */ 20649202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2065a895cb8bSLior David } else { 2066a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 20679202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 206854ed90a8SVladimir Kondratiev } 20699202d7b6SMaya Erez if (unlikely(!ring)) { 207010590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20712be7d22fSVladimir Kondratiev goto drop; 20722be7d22fSVladimir Kondratiev } 20732be7d22fSVladimir Kondratiev /* set up vring entry */ 20749202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2075d58db4e4SVladimir Kondratiev 20762be7d22fSVladimir Kondratiev switch (rc) { 20772be7d22fSVladimir Kondratiev case 0: 2078f9e3033fSDedy Lansky /* shall we stop net queues? */ 20799202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2080795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20812be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20822be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20832be7d22fSVladimir Kondratiev case -ENOMEM: 20842be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20852be7d22fSVladimir Kondratiev default: 2086afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20872be7d22fSVladimir Kondratiev } 20882be7d22fSVladimir Kondratiev drop: 20892be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20902be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20912be7d22fSVladimir Kondratiev 20922be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20932be7d22fSVladimir Kondratiev } 20942be7d22fSVladimir Kondratiev 2095a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2096a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2097a24a3d6aSDedy Lansky { 2098a24a3d6aSDedy Lansky int skb_time_us; 2099a24a3d6aSDedy Lansky int bin; 2100a24a3d6aSDedy Lansky 2101a24a3d6aSDedy Lansky if (!wil->tx_latency) 2102a24a3d6aSDedy Lansky return; 2103a24a3d6aSDedy Lansky 2104a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2105a24a3d6aSDedy Lansky return; 2106a24a3d6aSDedy Lansky 2107a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2108a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2109a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2110a24a3d6aSDedy Lansky 2111a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2112a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2113a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2114a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2115a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2116a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2117a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2118a24a3d6aSDedy Lansky } 2119a24a3d6aSDedy Lansky 21202be7d22fSVladimir Kondratiev /** 21212be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 21222be7d22fSVladimir Kondratiev * 2123e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2124e0287c4aSVladimir Kondratiev * 21252be7d22fSVladimir Kondratiev * Safe to call from IRQ 21262be7d22fSVladimir Kondratiev */ 21275bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 21282be7d22fSVladimir Kondratiev { 21295bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 21305bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 21312be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 213210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 213310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2134e0287c4aSVladimir Kondratiev int done = 0; 213510590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 213641d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2137c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 21380436fd9aSVladimir Shulman int used_before_complete; 21390436fd9aSVladimir Shulman int used_new; 21402be7d22fSVladimir Kondratiev 214133c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21422be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2143e0287c4aSVladimir Kondratiev return 0; 21442be7d22fSVladimir Kondratiev } 21452be7d22fSVladimir Kondratiev 214633c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2147097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2148097638a0SVladimir Kondratiev return 0; 2149097638a0SVladimir Kondratiev } 2150097638a0SVladimir Kondratiev 2151af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21522be7d22fSVladimir Kondratiev 215310590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 21540436fd9aSVladimir Shulman 215541d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 215641d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 215741d6b093SVladimir Kondratiev 215810590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2159c236658fSVladimir Kondratiev int new_swtail; 2160c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2161c236658fSVladimir Kondratiev /** 2162c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21633d4bde15SVladimir Kondratiev * last fragment. look for it. 21643d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2165c236658fSVladimir Kondratiev */ 2166c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2167c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2168c236658fSVladimir Kondratiev 216910590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 217033c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2171c236658fSVladimir Kondratiev break; 2172c236658fSVladimir Kondratiev 2173c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2174c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21754de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21767e594444SVladimir Kondratiev u16 dmalen; 217776dfa4b7SVladimir Kondratiev struct sk_buff *skb; 217876dfa4b7SVladimir Kondratiev 217976dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 218076dfa4b7SVladimir Kondratiev skb = ctx->skb; 218110590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 21824de41befSVladimir Kondratiev 218368ada71eSVladimir Kondratiev *d = *_d; 21844de41befSVladimir Kondratiev 21857e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 218698658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 218798658095SVladimir Kondratiev d->dma.error); 21887743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21895b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21905b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21915b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21925b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21932be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21942be7d22fSVladimir Kondratiev 21959202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21969202d7b6SMaya Erez (union wil_tx_desc *)d, 21979202d7b6SMaya Erez ctx); 2198f88f113aSVladimir Kondratiev 21992be7d22fSVladimir Kondratiev if (skb) { 220033c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2201795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2202795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 220341d6b093SVladimir Kondratiev if (stats) { 220441d6b093SVladimir Kondratiev stats->tx_packets++; 2205c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2206a24a3d6aSDedy Lansky 2207a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2208a24a3d6aSDedy Lansky &wil->sta[cid]); 220941d6b093SVladimir Kondratiev } 2210795ce734SVladimir Kondratiev } else { 2211795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 221241d6b093SVladimir Kondratiev if (stats) 2213c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2214795ce734SVladimir Kondratiev } 2215713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 22162be7d22fSVladimir Kondratiev } 2217f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2218eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 221910590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2220eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2221eb26cff1SMaya Erez * is completed. 2222eb26cff1SMaya Erez */ 2223eb26cff1SMaya Erez wmb(); 2224c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 222503269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 222603269c65SVladimir Kondratiev * so hardware will not try to process this desc., 222703269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 222803269c65SVladimir Kondratiev */ 222910590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2230e0287c4aSVladimir Kondratiev done++; 22312be7d22fSVladimir Kondratiev } 2232c236658fSVladimir Kondratiev } 223367c3e1b4SVladimir Kondratiev 22340436fd9aSVladimir Shulman /* performance monitoring */ 223510590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 223610590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 22370436fd9aSVladimir Shulman used_new, used_before_complete)) { 22380436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 22390436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 22407c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 22417c0acf86SVladimir Kondratiev } 224267c3e1b4SVladimir Kondratiev 2243f9e3033fSDedy Lansky /* shall we wake net queues? */ 2244f9e3033fSDedy Lansky if (done) 22455bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2246e0287c4aSVladimir Kondratiev 2247e0287c4aSVladimir Kondratiev return done; 22482be7d22fSVladimir Kondratiev } 224996c93589SGidon Studinski 225096c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 225196c93589SGidon Studinski { 225296c93589SGidon Studinski return 0; 225396c93589SGidon Studinski } 225496c93589SGidon Studinski 225596c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 225696c93589SGidon Studinski 22577be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 22587be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 22591bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 22607be13fc3SGidon Studinski { 22617be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 22627be13fc3SGidon Studinski 22637be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 22647be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); 22657be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 22667be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 22677be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 22681bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 22697be13fc3SGidon Studinski } 22707be13fc3SGidon Studinski 227196c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 227296c93589SGidon Studinski { 227396c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 227496c93589SGidon Studinski wil_configure_interrupt_moderation; 227596c93589SGidon Studinski /* TX ops */ 22769202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 22779202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 22789202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 227996c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 228096c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 228196c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 228296c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 228396c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 228496c93589SGidon Studinski /* RX ops */ 228596c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 22867be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 22877be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 22887be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 22897be13fc3SGidon Studinski wil_get_netif_rx_params; 22907be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2291e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 22927be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 229396c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 229496c93589SGidon Studinski } 2295