12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3387f3794SMaya Erez * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved. 42be7d22fSVladimir Kondratiev * 52be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 62be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 72be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 82be7d22fSVladimir Kondratiev * 92be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 102be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 112be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 122be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 132be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 142be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 152be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 162be7d22fSVladimir Kondratiev */ 172be7d22fSVladimir Kondratiev 182be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 192be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 202be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 212be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 22504937d4SKirshenbaum Erez #include <linux/ip.h> 23504937d4SKirshenbaum Erez #include <linux/ipv6.h> 24504937d4SKirshenbaum Erez #include <net/ipv6.h> 250786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 262be7d22fSVladimir Kondratiev 272be7d22fSVladimir Kondratiev #include "wil6210.h" 282be7d22fSVladimir Kondratiev #include "wmi.h" 292be7d22fSVladimir Kondratiev #include "txrx.h" 3098658095SVladimir Kondratiev #include "trace.h" 317be13fc3SGidon Studinski #include "txrx_edma.h" 322be7d22fSVladimir Kondratiev 33c406ea7cSVladimir Kondratiev bool rx_align_2; 3478484c44SMaya Erez module_param(rx_align_2, bool, 0444); 35c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 36c406ea7cSVladimir Kondratiev 3752a45702SLior David bool rx_large_buf; 3852a45702SLior David module_param(rx_large_buf, bool, 0444); 3952a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4052a45702SLior David 41c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 42c406ea7cSVladimir Kondratiev { 43c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 44c406ea7cSVladimir Kondratiev } 45c406ea7cSVladimir Kondratiev 4610590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 4710590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 482be7d22fSVladimir Kondratiev { 4910590c6aSGidon Studinski return ring->size / 8; 502be7d22fSVladimir Kondratiev } 512be7d22fSVladimir Kondratiev 5210590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 5310590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 542be7d22fSVladimir Kondratiev { 5510590c6aSGidon Studinski return ring->size / 4; 565bb6423eSVladimir Kondratiev } 575bb6423eSVladimir Kondratiev 58f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 5910590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 60f9e3033fSDedy Lansky { 6110590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 62f9e3033fSDedy Lansky } 63f9e3033fSDedy Lansky 64f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 6510590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 66f9e3033fSDedy Lansky { 6710590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 68f9e3033fSDedy Lansky } 69f9e3033fSDedy Lansky 70fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 71fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 72fe9ee51eSMaya Erez { 73fe9ee51eSMaya Erez int i; 74fe9ee51eSMaya Erez unsigned long data_comp_to; 75df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 76fe9ee51eSMaya Erez 77df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 7810590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 7910590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 8010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 8110590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 82fe9ee51eSMaya Erez 83fe9ee51eSMaya Erez spin_lock(&txdata->lock); 84fe9ee51eSMaya Erez 85fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 86fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 87fe9ee51eSMaya Erez continue; 88fe9ee51eSMaya Erez } 89fe9ee51eSMaya Erez 90fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 91fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 92fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 9310590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 94fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 95fe9ee51eSMaya Erez wil_dbg_pm(wil, 96fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 97fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 98fe9ee51eSMaya Erez return false; 99fe9ee51eSMaya Erez } 100fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 101fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 102fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 103fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 104fe9ee51eSMaya Erez msleep(20); 105fe9ee51eSMaya Erez spin_lock(&txdata->lock); 106fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 107fe9ee51eSMaya Erez break; 108fe9ee51eSMaya Erez } 109fe9ee51eSMaya Erez } 110fe9ee51eSMaya Erez 111fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 112fe9ee51eSMaya Erez } 113fe9ee51eSMaya Erez 114fe9ee51eSMaya Erez return true; 115fe9ee51eSMaya Erez } 116fe9ee51eSMaya Erez 11710590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1182be7d22fSVladimir Kondratiev { 1192be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1202be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1212be7d22fSVladimir Kondratiev uint i; 1222be7d22fSVladimir Kondratiev 123af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1249cf10d62SVladimir Kondratiev 1252be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1262be7d22fSVladimir Kondratiev 1272be7d22fSVladimir Kondratiev vring->swhead = 0; 1282be7d22fSVladimir Kondratiev vring->swtail = 0; 129f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1302be7d22fSVladimir Kondratiev if (!vring->ctx) { 1312be7d22fSVladimir Kondratiev vring->va = NULL; 1322be7d22fSVladimir Kondratiev return -ENOMEM; 1332be7d22fSVladimir Kondratiev } 134f2de576dSHamad Kadmany 1350436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 136f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 137f2de576dSHamad Kadmany * 138f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 139f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1403dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1413dc2c13bSLazar Alexei * allocation before allocating vring memory. 142f2de576dSHamad Kadmany * 143f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 144f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 145f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1462be7d22fSVladimir Kondratiev */ 1473dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 148f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 149f2de576dSHamad Kadmany 1502be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1512be7d22fSVladimir Kondratiev if (!vring->va) { 1522be7d22fSVladimir Kondratiev kfree(vring->ctx); 1532be7d22fSVladimir Kondratiev vring->ctx = NULL; 1542be7d22fSVladimir Kondratiev return -ENOMEM; 1552be7d22fSVladimir Kondratiev } 156f2de576dSHamad Kadmany 1573dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1583dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1593dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 160f2de576dSHamad Kadmany 1612be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1622be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1632be7d22fSVladimir Kondratiev * we can use any 1642be7d22fSVladimir Kondratiev */ 1652be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 16610590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 16710590c6aSGidon Studinski &vring->va[i].tx.legacy; 1688fe59627SVladimir Kondratiev 16968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1702be7d22fSVladimir Kondratiev } 1712be7d22fSVladimir Kondratiev 17239c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 17339c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1742be7d22fSVladimir Kondratiev 1752be7d22fSVladimir Kondratiev return 0; 1762be7d22fSVladimir Kondratiev } 1772be7d22fSVladimir Kondratiev 1789202d7b6SMaya Erez static void wil_txdesc_unmap(struct device *dev, union wil_tx_desc *desc, 1792232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1802232abd5SVladimir Kondratiev { 1819202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 1822232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1832232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1848fe59627SVladimir Kondratiev 1852232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1862232abd5SVladimir Kondratiev case wil_mapped_as_single: 1872232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1882232abd5SVladimir Kondratiev break; 1892232abd5SVladimir Kondratiev case wil_mapped_as_page: 1902232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1912232abd5SVladimir Kondratiev break; 1922232abd5SVladimir Kondratiev default: 1932232abd5SVladimir Kondratiev break; 1942232abd5SVladimir Kondratiev } 1952232abd5SVladimir Kondratiev } 1962232abd5SVladimir Kondratiev 19796c93589SGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring) 1982be7d22fSVladimir Kondratiev { 1992be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2002be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2012be7d22fSVladimir Kondratiev 2029b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 20396c93589SGidon Studinski if (!vring->is_rx) { 20410590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 205ef77285fSVladimir Kondratiev 206ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 207ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 208ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 209ef77285fSVladimir Kondratiev } else { 210ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 211ef77285fSVladimir Kondratiev vring->size, vring->va, 212ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 213ef77285fSVladimir Kondratiev } 214ef77285fSVladimir Kondratiev 21510590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 21668ada71eSVladimir Kondratiev dma_addr_t pa; 2177e594444SVladimir Kondratiev u16 dmalen; 218f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 21968ada71eSVladimir Kondratiev 22096c93589SGidon Studinski if (!vring->is_rx) { 22168ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 22268ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 22310590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 22468ada71eSVladimir Kondratiev 225f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 22634b8886eSMaya Erez if (!ctx) { 22734b8886eSMaya Erez wil_dbg_txrx(wil, 22834b8886eSMaya Erez "ctx(%d) was already completed\n", 22934b8886eSMaya Erez vring->swtail); 23010590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 23134b8886eSMaya Erez continue; 23234b8886eSMaya Erez } 23368ada71eSVladimir Kondratiev *d = *_d; 2349202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 235f88f113aSVladimir Kondratiev if (ctx->skb) 236f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 23710590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2382be7d22fSVladimir Kondratiev } else { /* rx */ 23968ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 24068ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 24110590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 24268ada71eSVladimir Kondratiev 243f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 24468ada71eSVladimir Kondratiev *d = *_d; 24568ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2467e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2477e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 248f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 24910590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2502be7d22fSVladimir Kondratiev } 2512be7d22fSVladimir Kondratiev } 2522be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2532be7d22fSVladimir Kondratiev kfree(vring->ctx); 2542be7d22fSVladimir Kondratiev vring->pa = 0; 2552be7d22fSVladimir Kondratiev vring->va = NULL; 2562be7d22fSVladimir Kondratiev vring->ctx = NULL; 2572be7d22fSVladimir Kondratiev } 2582be7d22fSVladimir Kondratiev 2592be7d22fSVladimir Kondratiev /** 2602be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2612be7d22fSVladimir Kondratiev * 2622be7d22fSVladimir Kondratiev * Safe to call from IRQ 2632be7d22fSVladimir Kondratiev */ 26410590c6aSGidon Studinski static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct wil_ring *vring, 2652be7d22fSVladimir Kondratiev u32 i, int headroom) 2662be7d22fSVladimir Kondratiev { 2672be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 26852a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 26968ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 27010590c6aSGidon Studinski volatile struct vring_rx_desc *_d = &vring->va[i].rx.legacy; 2712be7d22fSVladimir Kondratiev dma_addr_t pa; 2722be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2738fe59627SVladimir Kondratiev 2742be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2752be7d22fSVladimir Kondratiev return -ENOMEM; 2762be7d22fSVladimir Kondratiev 2772be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2782be7d22fSVladimir Kondratiev skb_put(skb, sz); 2792be7d22fSVladimir Kondratiev 2800b853210SMaya Erez /** 2810b853210SMaya Erez * Make sure that the network stack calculates checksum for packets 2820b853210SMaya Erez * which failed the HW checksum calculation 2830b853210SMaya Erez */ 2840b853210SMaya Erez skb->ip_summed = CHECKSUM_NONE; 2850b853210SMaya Erez 2862be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2872be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2882be7d22fSVladimir Kondratiev kfree_skb(skb); 2892be7d22fSVladimir Kondratiev return -ENOMEM; 2902be7d22fSVladimir Kondratiev } 2912be7d22fSVladimir Kondratiev 29248c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29368ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2942be7d22fSVladimir Kondratiev /* ip_length don't care */ 2952be7d22fSVladimir Kondratiev /* b11 don't care */ 2962be7d22fSVladimir Kondratiev /* error don't care */ 2972be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2987e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 29968ada71eSVladimir Kondratiev *_d = *d; 300f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3012be7d22fSVladimir Kondratiev 3022be7d22fSVladimir Kondratiev return 0; 3032be7d22fSVladimir Kondratiev } 3042be7d22fSVladimir Kondratiev 3052be7d22fSVladimir Kondratiev /** 3062be7d22fSVladimir Kondratiev * Adds radiotap header 3072be7d22fSVladimir Kondratiev * 3082be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3092be7d22fSVladimir Kondratiev * 3102be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3112be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3122be7d22fSVladimir Kondratiev * - Phy info 3132be7d22fSVladimir Kondratiev */ 3142be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 31533e61169SVladimir Kondratiev struct sk_buff *skb) 3162be7d22fSVladimir Kondratiev { 3172be7d22fSVladimir Kondratiev struct wil6210_rtap { 3182be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3192be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3202be7d22fSVladimir Kondratiev /* flags */ 3212be7d22fSVladimir Kondratiev u8 flags; 3222be7d22fSVladimir Kondratiev /* channel */ 3232be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3242be7d22fSVladimir Kondratiev __le16 chnl_flags; 3252be7d22fSVladimir Kondratiev /* MCS */ 3262be7d22fSVladimir Kondratiev u8 mcs_present; 3272be7d22fSVladimir Kondratiev u8 mcs_flags; 3282be7d22fSVladimir Kondratiev u8 mcs_index; 3292be7d22fSVladimir Kondratiev } __packed; 33033e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 331387f3794SMaya Erez struct wil6210_rtap *rtap; 3322be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3337d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3342be7d22fSVladimir Kondratiev 3352be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3362be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3379165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3382be7d22fSVladimir Kondratiev return; 3392be7d22fSVladimir Kondratiev } 3402be7d22fSVladimir Kondratiev 341387f3794SMaya Erez rtap = skb_push(skb, rtap_len); 342387f3794SMaya Erez memset(rtap, 0, rtap_len); 3432be7d22fSVladimir Kondratiev 344387f3794SMaya Erez rtap->rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 345387f3794SMaya Erez rtap->rthdr.it_len = cpu_to_le16(rtap_len); 346387f3794SMaya Erez rtap->rthdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | 3472be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3482be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3492be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 350387f3794SMaya Erez rtap->flags |= IEEE80211_RADIOTAP_F_BADFCS; 3512be7d22fSVladimir Kondratiev 352387f3794SMaya Erez rtap->chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 353387f3794SMaya Erez rtap->chnl_flags = cpu_to_le16(0); 3542be7d22fSVladimir Kondratiev 355387f3794SMaya Erez rtap->mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 356387f3794SMaya Erez rtap->mcs_flags = 0; 357387f3794SMaya Erez rtap->mcs_index = wil_rxdesc_mcs(d); 3582be7d22fSVladimir Kondratiev } 3592be7d22fSVladimir Kondratiev 3607be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 361fe9ee51eSMaya Erez { 362fe9ee51eSMaya Erez struct vring_rx_desc *_d; 36310590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 364fe9ee51eSMaya Erez 36510590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 366fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 367fe9ee51eSMaya Erez return false; 368fe9ee51eSMaya Erez 369fe9ee51eSMaya Erez return true; 370fe9ee51eSMaya Erez } 371fe9ee51eSMaya Erez 3722be7d22fSVladimir Kondratiev /** 3732be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 3742be7d22fSVladimir Kondratiev * 37533e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 37633e61169SVladimir Kondratiev * 3772be7d22fSVladimir Kondratiev * Safe to call from IRQ 3782be7d22fSVladimir Kondratiev */ 3792be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 38010590c6aSGidon Studinski struct wil_ring *vring) 3812be7d22fSVladimir Kondratiev { 3822be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 3835bd60982SLior David struct wil6210_vif *vif; 3845bd60982SLior David struct net_device *ndev; 38568ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 38668ada71eSVladimir Kondratiev struct vring_rx_desc *d; 3872be7d22fSVladimir Kondratiev struct sk_buff *skb; 3882be7d22fSVladimir Kondratiev dma_addr_t pa; 389c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 39052a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 3917e594444SVladimir Kondratiev u16 dmalen; 3922be7d22fSVladimir Kondratiev u8 ftype; 3935bd60982SLior David int cid, mid; 3943b282bc6SVladimir Kondratiev int i; 395c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 396c8b78b5fSVladimir Kondratiev 39733e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 39833e61169SVladimir Kondratiev 3993b282bc6SVladimir Kondratiev again: 40010590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4012be7d22fSVladimir Kondratiev return NULL; 4022be7d22fSVladimir Kondratiev 4033b282bc6SVladimir Kondratiev i = (int)vring->swhead; 40410590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 40533c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4062be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4072be7d22fSVladimir Kondratiev return NULL; 4082be7d22fSVladimir Kondratiev } 4092be7d22fSVladimir Kondratiev 410148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 411148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 41210590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 413148416a9SVladimir Kondratiev if (!skb) { 414148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4153b282bc6SVladimir Kondratiev goto again; 416148416a9SVladimir Kondratiev } 41768ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 41868ada71eSVladimir Kondratiev *d = *_d; 41968ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 42068ada71eSVladimir Kondratiev 42168ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 42268ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 42368ada71eSVladimir Kondratiev 424148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 425148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 426a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 42768ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 42868ada71eSVladimir Kondratiev 4293b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4305bd60982SLior David mid = wil_rxdesc_mid(d); 4315bd60982SLior David vif = wil->vifs[mid]; 4325bd60982SLior David 4335bd60982SLior David if (unlikely(!vif)) { 4345bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4355bd60982SLior David mid); 4365bd60982SLior David kfree_skb(skb); 4375bd60982SLior David goto again; 4385bd60982SLior David } 4395bd60982SLior David ndev = vif_to_ndev(vif); 4403b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 4413b282bc6SVladimir Kondratiev 44233c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 443e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 4443b282bc6SVladimir Kondratiev stats->rx_large_frame++; 445110dea00SWei Yongjun kfree_skb(skb); 4463b282bc6SVladimir Kondratiev goto again; 447e270045bSVladimir Kondratiev } 4487e594444SVladimir Kondratiev skb_trim(skb, dmalen); 44933e61169SVladimir Kondratiev 4501cbbcb08SVladimir Kondratiev prefetch(skb->data); 4511cbbcb08SVladimir Kondratiev 452c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 453c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 454c0d37713SVladimir Kondratiev 455c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 456c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 457c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 4582be7d22fSVladimir Kondratiev 4592be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 4602be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 46133e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 4622be7d22fSVladimir Kondratiev 4632be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 4642be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 4652be7d22fSVladimir Kondratiev return skb; 466a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 4672be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 4682be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 4692be7d22fSVladimir Kondratiev */ 47068ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 47133c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 472a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 473a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 474a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 475a8313341SVladimir Kondratiev 476a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 477a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 478a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 4793b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 480a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 481a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 482a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 483a8313341SVladimir Kondratiev mid, cid, tid, seq); 4845bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 485a8313341SVladimir Kondratiev } else { 486a8313341SVladimir Kondratiev /* print again all info. One can enable only this 487a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 488a8313341SVladimir Kondratiev */ 489a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 490a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 491a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 492a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 493a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 494a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 495a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 496a8313341SVladimir Kondratiev } 4972be7d22fSVladimir Kondratiev kfree_skb(skb); 4983b282bc6SVladimir Kondratiev goto again; 4992be7d22fSVladimir Kondratiev } 5002be7d22fSVladimir Kondratiev 501c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5022be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5033b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5042be7d22fSVladimir Kondratiev kfree_skb(skb); 5053b282bc6SVladimir Kondratiev goto again; 5062be7d22fSVladimir Kondratiev } 5072be7d22fSVladimir Kondratiev 508504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 509504937d4SKirshenbaum Erez * and in case of error drop the packet 510504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 511504937d4SKirshenbaum Erez */ 51233c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 513504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 51433c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 515504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5164a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5174a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5184a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5194a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5204a68ab10SVladimir Kondratiev */ 5210b853210SMaya Erez else 5220b853210SMaya Erez stats->rx_csum_err++; 523504937d4SKirshenbaum Erez } 524504937d4SKirshenbaum Erez 525c406ea7cSVladimir Kondratiev if (snaplen) { 526c406ea7cSVladimir Kondratiev /* Packet layout 527c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 528c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 529c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 530c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 531c406ea7cSVladimir Kondratiev */ 532c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 533c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 534c406ea7cSVladimir Kondratiev } 535c406ea7cSVladimir Kondratiev 5362be7d22fSVladimir Kondratiev return skb; 5372be7d22fSVladimir Kondratiev } 5382be7d22fSVladimir Kondratiev 5392be7d22fSVladimir Kondratiev /** 5402be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 5412be7d22fSVladimir Kondratiev * buffers posted at @swtail 5425bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 5435bd60982SLior David * allocate skbs with headroom according to main interface only. This 5445bd60982SLior David * means it will not work with monitor interface together with other VIFs. 5455bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 5465bd60982SLior David * and we will need to fix this code once we add support. 5472be7d22fSVladimir Kondratiev */ 5482be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 5492be7d22fSVladimir Kondratiev { 550e00243faSLior David struct net_device *ndev = wil->main_ndev; 55110590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 5522be7d22fSVladimir Kondratiev u32 next_tail; 5532be7d22fSVladimir Kondratiev int rc = 0; 5542be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 5552be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 5562be7d22fSVladimir Kondratiev 55710590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 5582be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 5592be7d22fSVladimir Kondratiev v->swtail = next_tail) { 5602be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 56133c477fdSVladimir Kondratiev if (unlikely(rc)) { 5623d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 5632be7d22fSVladimir Kondratiev rc, v->swtail); 5642be7d22fSVladimir Kondratiev break; 5652be7d22fSVladimir Kondratiev } 5662be7d22fSVladimir Kondratiev } 567ab6d7cc3SMaya Erez 568ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 569ab6d7cc3SMaya Erez * committing them to HW 570ab6d7cc3SMaya Erez */ 571ab6d7cc3SMaya Erez wmb(); 572ab6d7cc3SMaya Erez 573b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 5742be7d22fSVladimir Kondratiev 5752be7d22fSVladimir Kondratiev return rc; 5762be7d22fSVladimir Kondratiev } 5772be7d22fSVladimir Kondratiev 57858527421SVladimir Kondratiev /** 57958527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 58058527421SVladimir Kondratiev * @cs: One area of memory 58158527421SVladimir Kondratiev * @ct: Another area of memory 58258527421SVladimir Kondratiev * @count: The size of the area. 58358527421SVladimir Kondratiev * 58458527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 58558527421SVladimir Kondratiev * with minimal modifications 58658527421SVladimir Kondratiev */ 5877be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 58858527421SVladimir Kondratiev { 58958527421SVladimir Kondratiev const unsigned char *su1, *su2; 59058527421SVladimir Kondratiev int res = 0; 59158527421SVladimir Kondratiev 59258527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 59358527421SVladimir Kondratiev --su1, --su2, count--) { 59458527421SVladimir Kondratiev res = *su1 - *su2; 59558527421SVladimir Kondratiev if (res) 59658527421SVladimir Kondratiev break; 59758527421SVladimir Kondratiev } 59858527421SVladimir Kondratiev return res; 59958527421SVladimir Kondratiev } 60058527421SVladimir Kondratiev 60158527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 60258527421SVladimir Kondratiev { 60358527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 60458527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 60558527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 60658527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 60758527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 60858527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 60958527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 61058527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 61158527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 61258527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 61358527421SVladimir Kondratiev 61458527421SVladimir Kondratiev if (!cc->key_set) { 61558527421SVladimir Kondratiev wil_err_ratelimited(wil, 61658527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 61758527421SVladimir Kondratiev cid, tid, mc, key_id); 61858527421SVladimir Kondratiev return -EINVAL; 61958527421SVladimir Kondratiev } 62058527421SVladimir Kondratiev 62158527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 62258527421SVladimir Kondratiev wil_err_ratelimited(wil, 62358527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 62458527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 62558527421SVladimir Kondratiev return -EINVAL; 62658527421SVladimir Kondratiev } 62758527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 62858527421SVladimir Kondratiev 62958527421SVladimir Kondratiev return 0; 63058527421SVladimir Kondratiev } 63158527421SVladimir Kondratiev 632e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 633e15af41cSDedy Lansky struct wil_net_stats *stats) 634e15af41cSDedy Lansky { 635e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 636e15af41cSDedy Lansky 637e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 638e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 639e15af41cSDedy Lansky stats->rx_mic_error++; 640e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 641e15af41cSDedy Lansky return -EFAULT; 642e15af41cSDedy Lansky } 643e15af41cSDedy Lansky 644e15af41cSDedy Lansky return 0; 645e15af41cSDedy Lansky } 646e15af41cSDedy Lansky 6477be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 6487be13fc3SGidon Studinski int *security) 6497be13fc3SGidon Studinski { 6507be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 6517be13fc3SGidon Studinski 6527be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 6537be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 6547be13fc3SGidon Studinski } 6557be13fc3SGidon Studinski 6562be7d22fSVladimir Kondratiev /* 6572be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 658e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6592be7d22fSVladimir Kondratiev */ 660b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6612be7d22fSVladimir Kondratiev { 662c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 663e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 664c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 665e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 6662be7d22fSVladimir Kondratiev unsigned int len = skb->len; 6677be13fc3SGidon Studinski int cid; 6687be13fc3SGidon Studinski int security; 669c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 670c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 671c42da999SVladimir Kondratiev * is not suitable, need to look at data 672c42da999SVladimir Kondratiev */ 673c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 6747be13fc3SGidon Studinski struct wil_net_stats *stats; 675c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 676c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 677c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 678c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 679c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 680c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 681c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 682c42da999SVladimir Kondratiev }; 6832be7d22fSVladimir Kondratiev 6847be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 6857be13fc3SGidon Studinski 6867be13fc3SGidon Studinski stats = &wil->sta[cid].stats; 6877be13fc3SGidon Studinski 688241804cbSVladimir Kondratiev skb_orphan(skb); 689241804cbSVladimir Kondratiev 6907be13fc3SGidon Studinski if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 69158527421SVladimir Kondratiev rc = GRO_DROP; 69258527421SVladimir Kondratiev dev_kfree_skb(skb); 69358527421SVladimir Kondratiev stats->rx_replay++; 69458527421SVladimir Kondratiev goto stats; 69558527421SVladimir Kondratiev } 69658527421SVladimir Kondratiev 697e15af41cSDedy Lansky /* check errors reported by HW and update statistics */ 698e15af41cSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 699e15af41cSDedy Lansky dev_kfree_skb(skb); 700e15af41cSDedy Lansky return; 701e15af41cSDedy Lansky } 702e15af41cSDedy Lansky 7039a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 7049a65064aSDedy Lansky if (mcast && ether_addr_equal(eth->h_source, ndev->dev_addr)) { 7059a65064aSDedy Lansky /* mcast packet looped back to us */ 7069a65064aSDedy Lansky rc = GRO_DROP; 7079a65064aSDedy Lansky dev_kfree_skb(skb); 7089a65064aSDedy Lansky goto stats; 7099a65064aSDedy Lansky } 7109a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 711c42da999SVladimir Kondratiev if (mcast) { 712c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 713c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 714c42da999SVladimir Kondratiev */ 715c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 716c42da999SVladimir Kondratiev } else { 717e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 718e00243faSLior David eth->h_dest); 7192be7d22fSVladimir Kondratiev 720c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 721c42da999SVladimir Kondratiev /* The destination station is associated to 722c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 723c42da999SVladimir Kondratiev * directly to it and do not pass it to local 724c42da999SVladimir Kondratiev * net stack. 725c42da999SVladimir Kondratiev */ 726c42da999SVladimir Kondratiev xmit_skb = skb; 727c42da999SVladimir Kondratiev skb = NULL; 728c42da999SVladimir Kondratiev } 729c42da999SVladimir Kondratiev } 730c42da999SVladimir Kondratiev } 731c42da999SVladimir Kondratiev if (xmit_skb) { 732c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 733c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 734c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 735c42da999SVladimir Kondratiev */ 736c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 737c42da999SVladimir Kondratiev xmit_skb->priority += 256; 738c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 739c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 740c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 741c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 742c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 743c42da999SVladimir Kondratiev } 744c42da999SVladimir Kondratiev 745c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 746c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 7475bd60982SLior David skb->dev = ndev; 748c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 749c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 750c42da999SVladimir Kondratiev len, gro_res_str[rc]); 751c42da999SVladimir Kondratiev } 75258527421SVladimir Kondratiev stats: 753c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 754b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 755b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 756b5998e6aSVladimir Kondratiev stats->rx_dropped++; 757b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 758b5998e6aSVladimir Kondratiev } else { 7592be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 760c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7612be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 762c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 763c42da999SVladimir Kondratiev if (mcast) 764c42da999SVladimir Kondratiev ndev->stats.multicast++; 765194b482bSVladimir Kondratiev } 7662be7d22fSVladimir Kondratiev } 7672be7d22fSVladimir Kondratiev 7682be7d22fSVladimir Kondratiev /** 7692be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7702be7d22fSVladimir Kondratiev * 771e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 7722be7d22fSVladimir Kondratiev */ 773e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 7742be7d22fSVladimir Kondratiev { 775e00243faSLior David struct net_device *ndev = wil->main_ndev; 776e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 77710590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 7782be7d22fSVladimir Kondratiev struct sk_buff *skb; 7792be7d22fSVladimir Kondratiev 78033c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 7812be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 7822be7d22fSVladimir Kondratiev return; 7832be7d22fSVladimir Kondratiev } 784af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 785e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 786e0287c4aSVladimir Kondratiev (*quota)--; 7872be7d22fSVladimir Kondratiev 788e00243faSLior David /* monitor is currently supported on main interface only */ 789e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 7902be7d22fSVladimir Kondratiev skb->dev = ndev; 7912be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 7922be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 7932be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 7942be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 795b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 7962be7d22fSVladimir Kondratiev } else { 797b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 7982be7d22fSVladimir Kondratiev } 7992be7d22fSVladimir Kondratiev } 8002be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8012be7d22fSVladimir Kondratiev } 8022be7d22fSVladimir Kondratiev 80352a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 80452a45702SLior David { 80552a45702SLior David wil->rx_buf_len = rx_large_buf ? 80652a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 80752a45702SLior David if (mtu_max > wil->rx_buf_len) { 80852a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 80952a45702SLior David * backward compatibility (mtu_max parameter was also used 81052a45702SLior David * to support receiving large packets) 81152a45702SLior David */ 81252a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 81352a45702SLior David wil->rx_buf_len = mtu_max; 81452a45702SLior David } 81552a45702SLior David } 81652a45702SLior David 81761e5ec04SDedy Lansky static int wil_rx_init(struct wil6210_priv *wil, uint order) 8182be7d22fSVladimir Kondratiev { 81910590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8202be7d22fSVladimir Kondratiev int rc; 8212be7d22fSVladimir Kondratiev 822af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8239cf10d62SVladimir Kondratiev 8248bf6adb9SVladimir Kondratiev if (vring->va) { 8258bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8268bf6adb9SVladimir Kondratiev return -EINVAL; 8278bf6adb9SVladimir Kondratiev } 8288bf6adb9SVladimir Kondratiev 82952a45702SLior David wil_rx_buf_len_init(wil); 83052a45702SLior David 83161e5ec04SDedy Lansky vring->size = 1 << order; 83296c93589SGidon Studinski vring->is_rx = true; 8332be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8342be7d22fSVladimir Kondratiev if (rc) 8352be7d22fSVladimir Kondratiev return rc; 8362be7d22fSVladimir Kondratiev 83747e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8382be7d22fSVladimir Kondratiev if (rc) 8392be7d22fSVladimir Kondratiev goto err_free; 8402be7d22fSVladimir Kondratiev 8412be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8422be7d22fSVladimir Kondratiev if (rc) 8432be7d22fSVladimir Kondratiev goto err_free; 8442be7d22fSVladimir Kondratiev 8452be7d22fSVladimir Kondratiev return 0; 8462be7d22fSVladimir Kondratiev err_free: 84796c93589SGidon Studinski wil_vring_free(wil, vring); 8482be7d22fSVladimir Kondratiev 8492be7d22fSVladimir Kondratiev return rc; 8502be7d22fSVladimir Kondratiev } 8512be7d22fSVladimir Kondratiev 85296c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 8532be7d22fSVladimir Kondratiev { 85410590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8552be7d22fSVladimir Kondratiev 856af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8579cf10d62SVladimir Kondratiev 8582acb4220SVladimir Kondratiev if (vring->va) 85996c93589SGidon Studinski wil_vring_free(wil, vring); 8602be7d22fSVladimir Kondratiev } 8612be7d22fSVladimir Kondratiev 8629202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 8639202d7b6SMaya Erez u32 len, int vring_index) 8649202d7b6SMaya Erez { 8659202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 8669202d7b6SMaya Erez 8679202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 8689202d7b6SMaya Erez d->dma.ip_length = 0; 8699202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 8709202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 8719202d7b6SMaya Erez d->dma.error = 0; 8729202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 8739202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 8749202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 8759202d7b6SMaya Erez d->mac.d[0] = 0; 8769202d7b6SMaya Erez d->mac.d[1] = 0; 8779202d7b6SMaya Erez d->mac.d[2] = 0; 8789202d7b6SMaya Erez d->mac.ucode_cmd = 0; 8799202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 8809202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 8819202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 8829202d7b6SMaya Erez 8839202d7b6SMaya Erez return 0; 8849202d7b6SMaya Erez } 8859202d7b6SMaya Erez 88696c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 887875e9439SMaya Erez { 888875e9439SMaya Erez spin_lock_bh(&txdata->lock); 889875e9439SMaya Erez txdata->dot1x_open = 0; 890875e9439SMaya Erez txdata->enabled = 0; 891875e9439SMaya Erez txdata->idle = 0; 892875e9439SMaya Erez txdata->last_idle = 0; 893875e9439SMaya Erez txdata->begin = 0; 894875e9439SMaya Erez txdata->agg_wsize = 0; 895875e9439SMaya Erez txdata->agg_timeout = 0; 896875e9439SMaya Erez txdata->agg_amsdu = 0; 897875e9439SMaya Erez txdata->addba_in_progress = false; 898e00243faSLior David txdata->mid = U8_MAX; 899875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 900875e9439SMaya Erez } 901875e9439SMaya Erez 90296c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9032be7d22fSVladimir Kondratiev int cid, int tid) 9042be7d22fSVladimir Kondratiev { 905e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9062be7d22fSVladimir Kondratiev int rc; 9072be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9082be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9092be7d22fSVladimir Kondratiev .vring_cfg = { 9102be7d22fSVladimir Kondratiev .tx_sw_ring = { 9119a06bec9SVladimir Kondratiev .max_mpdu_size = 912c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 913b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9142be7d22fSVladimir Kondratiev }, 9152be7d22fSVladimir Kondratiev .ringid = id, 916a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9172be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9182be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9192be7d22fSVladimir Kondratiev .to_resolution = 0, 9203277213fSVladimir Kondratiev .agg_max_wsize = 0, 9212be7d22fSVladimir Kondratiev .schd_params = { 9222be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9232be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9242be7d22fSVladimir Kondratiev }, 9252be7d22fSVladimir Kondratiev }, 9262be7d22fSVladimir Kondratiev }; 9272be7d22fSVladimir Kondratiev struct { 928b874ddecSLior David struct wmi_cmd_hdr wmi; 9292be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 930807b0860SAlexei Avshalom Lazar } __packed reply = { 931807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 932807b0860SAlexei Avshalom Lazar }; 93310590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 93410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 9352be7d22fSVladimir Kondratiev 936af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 937e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9389b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9399cf10d62SVladimir Kondratiev 9402be7d22fSVladimir Kondratiev if (vring->va) { 9412be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9422be7d22fSVladimir Kondratiev rc = -EINVAL; 9432be7d22fSVladimir Kondratiev goto out; 9442be7d22fSVladimir Kondratiev } 9452be7d22fSVladimir Kondratiev 946875e9439SMaya Erez wil_tx_data_init(txdata); 94796c93589SGidon Studinski vring->is_rx = false; 9482be7d22fSVladimir Kondratiev vring->size = size; 9492be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9502be7d22fSVladimir Kondratiev if (rc) 9512be7d22fSVladimir Kondratiev goto out; 9522be7d22fSVladimir Kondratiev 95310590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 95410590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 95593ae6d49SVladimir Kondratiev 9562be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9572be7d22fSVladimir Kondratiev 958e00243faSLior David if (!vif->privacy) 959230d8442SVladimir Kondratiev txdata->dot1x_open = true; 960e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9612be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9622be7d22fSVladimir Kondratiev if (rc) 9632be7d22fSVladimir Kondratiev goto out_free; 9642be7d22fSVladimir Kondratiev 965b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9662be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9672be7d22fSVladimir Kondratiev reply.cmd.status); 968c331997bSVladimir Kondratiev rc = -EINVAL; 9692be7d22fSVladimir Kondratiev goto out_free; 9702be7d22fSVladimir Kondratiev } 9712be7d22fSVladimir Kondratiev 972dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 973dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 974e00243faSLior David txdata->mid = vif->mid; 975097638a0SVladimir Kondratiev txdata->enabled = 1; 976dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 977dc90506fSMaya Erez 978230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9793a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 980097638a0SVladimir Kondratiev 9812be7d22fSVladimir Kondratiev return 0; 9822be7d22fSVladimir Kondratiev out_free: 983875e9439SMaya Erez spin_lock_bh(&txdata->lock); 984230d8442SVladimir Kondratiev txdata->dot1x_open = false; 985230d8442SVladimir Kondratiev txdata->enabled = 0; 986875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 98796c93589SGidon Studinski wil_vring_free(wil, vring); 98810590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 98910590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 9900916d9f2SMaya Erez 9912be7d22fSVladimir Kondratiev out: 9922be7d22fSVladimir Kondratiev 9932be7d22fSVladimir Kondratiev return rc; 9942be7d22fSVladimir Kondratiev } 9952be7d22fSVladimir Kondratiev 996b9010f10SAhmad Masri static int wil_tx_vring_modify(struct wil6210_vif *vif, int ring_id, int cid, 997b9010f10SAhmad Masri int tid) 998b9010f10SAhmad Masri { 999b9010f10SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 1000b9010f10SAhmad Masri int rc; 1001b9010f10SAhmad Masri struct wmi_vring_cfg_cmd cmd = { 1002b9010f10SAhmad Masri .action = cpu_to_le32(WMI_VRING_CMD_MODIFY), 1003b9010f10SAhmad Masri .vring_cfg = { 1004b9010f10SAhmad Masri .tx_sw_ring = { 1005b9010f10SAhmad Masri .max_mpdu_size = 1006b9010f10SAhmad Masri cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1007b9010f10SAhmad Masri .ring_size = 0, 1008b9010f10SAhmad Masri }, 1009b9010f10SAhmad Masri .ringid = ring_id, 1010b9010f10SAhmad Masri .cidxtid = mk_cidxtid(cid, tid), 1011b9010f10SAhmad Masri .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 1012b9010f10SAhmad Masri .mac_ctrl = 0, 1013b9010f10SAhmad Masri .to_resolution = 0, 1014b9010f10SAhmad Masri .agg_max_wsize = 0, 1015b9010f10SAhmad Masri .schd_params = { 1016b9010f10SAhmad Masri .priority = cpu_to_le16(0), 1017b9010f10SAhmad Masri .timeslot_us = cpu_to_le16(0xfff), 1018b9010f10SAhmad Masri }, 1019b9010f10SAhmad Masri }, 1020b9010f10SAhmad Masri }; 1021b9010f10SAhmad Masri struct { 1022b9010f10SAhmad Masri struct wmi_cmd_hdr wmi; 1023b9010f10SAhmad Masri struct wmi_vring_cfg_done_event cmd; 1024b9010f10SAhmad Masri } __packed reply = { 1025b9010f10SAhmad Masri .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1026b9010f10SAhmad Masri }; 1027b9010f10SAhmad Masri struct wil_ring *vring = &wil->ring_tx[ring_id]; 1028b9010f10SAhmad Masri struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; 1029b9010f10SAhmad Masri 1030b9010f10SAhmad Masri wil_dbg_misc(wil, "vring_modify: ring %d cid %d tid %d\n", ring_id, 1031b9010f10SAhmad Masri cid, tid); 1032b9010f10SAhmad Masri lockdep_assert_held(&wil->mutex); 1033b9010f10SAhmad Masri 1034b9010f10SAhmad Masri if (!vring->va) { 1035b9010f10SAhmad Masri wil_err(wil, "Tx ring [%d] not allocated\n", ring_id); 1036b9010f10SAhmad Masri return -EINVAL; 1037b9010f10SAhmad Masri } 1038b9010f10SAhmad Masri 1039b9010f10SAhmad Masri if (wil->ring2cid_tid[ring_id][0] != cid || 1040b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] != tid) { 1041b9010f10SAhmad Masri wil_err(wil, "ring info does not match cid=%u tid=%u\n", 1042b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0], 1043b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1]); 1044b9010f10SAhmad Masri } 1045b9010f10SAhmad Masri 1046b9010f10SAhmad Masri cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 1047b9010f10SAhmad Masri 1048b9010f10SAhmad Masri rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 1049b9010f10SAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 1050b9010f10SAhmad Masri if (rc) 1051b9010f10SAhmad Masri goto fail; 1052b9010f10SAhmad Masri 1053b9010f10SAhmad Masri if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 1054b9010f10SAhmad Masri wil_err(wil, "Tx modify failed, status 0x%02x\n", 1055b9010f10SAhmad Masri reply.cmd.status); 1056b9010f10SAhmad Masri rc = -EINVAL; 1057b9010f10SAhmad Masri goto fail; 1058b9010f10SAhmad Masri } 1059b9010f10SAhmad Masri 1060b9010f10SAhmad Masri /* set BA aggregation window size to 0 to force a new BA with the 1061b9010f10SAhmad Masri * new AP 1062b9010f10SAhmad Masri */ 1063b9010f10SAhmad Masri txdata->agg_wsize = 0; 1064b9010f10SAhmad Masri if (txdata->dot1x_open && agg_wsize >= 0) 1065b9010f10SAhmad Masri wil_addba_tx_request(wil, ring_id, agg_wsize); 1066b9010f10SAhmad Masri 1067b9010f10SAhmad Masri return 0; 1068b9010f10SAhmad Masri fail: 1069b9010f10SAhmad Masri spin_lock_bh(&txdata->lock); 1070b9010f10SAhmad Masri txdata->dot1x_open = false; 1071b9010f10SAhmad Masri txdata->enabled = 0; 1072b9010f10SAhmad Masri spin_unlock_bh(&txdata->lock); 1073b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID; 1074b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] = 0; 1075b9010f10SAhmad Masri return rc; 1076b9010f10SAhmad Masri } 1077b9010f10SAhmad Masri 1078e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 107941d6b093SVladimir Kondratiev { 1080e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 108141d6b093SVladimir Kondratiev int rc; 108241d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 108341d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 108441d6b093SVladimir Kondratiev .vring_cfg = { 108541d6b093SVladimir Kondratiev .tx_sw_ring = { 108641d6b093SVladimir Kondratiev .max_mpdu_size = 108741d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 108841d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 108941d6b093SVladimir Kondratiev }, 109041d6b093SVladimir Kondratiev .ringid = id, 109141d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 109241d6b093SVladimir Kondratiev }, 109341d6b093SVladimir Kondratiev }; 109441d6b093SVladimir Kondratiev struct { 1095b874ddecSLior David struct wmi_cmd_hdr wmi; 109641d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1097807b0860SAlexei Avshalom Lazar } __packed reply = { 1098807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1099807b0860SAlexei Avshalom Lazar }; 110010590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 110110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 110241d6b093SVladimir Kondratiev 1103af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 110441d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 11059b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 110641d6b093SVladimir Kondratiev 110741d6b093SVladimir Kondratiev if (vring->va) { 110841d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 110941d6b093SVladimir Kondratiev rc = -EINVAL; 111041d6b093SVladimir Kondratiev goto out; 111141d6b093SVladimir Kondratiev } 111241d6b093SVladimir Kondratiev 1113875e9439SMaya Erez wil_tx_data_init(txdata); 111496c93589SGidon Studinski vring->is_rx = false; 111541d6b093SVladimir Kondratiev vring->size = size; 111641d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 111741d6b093SVladimir Kondratiev if (rc) 111841d6b093SVladimir Kondratiev goto out; 111941d6b093SVladimir Kondratiev 112010590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 112110590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 112241d6b093SVladimir Kondratiev 112341d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 112441d6b093SVladimir Kondratiev 1125e00243faSLior David if (!vif->privacy) 1126230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1127e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1128e00243faSLior David &cmd, sizeof(cmd), 112941d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 113041d6b093SVladimir Kondratiev if (rc) 113141d6b093SVladimir Kondratiev goto out_free; 113241d6b093SVladimir Kondratiev 113341d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 113441d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 113541d6b093SVladimir Kondratiev reply.cmd.status); 113641d6b093SVladimir Kondratiev rc = -EINVAL; 113741d6b093SVladimir Kondratiev goto out_free; 113841d6b093SVladimir Kondratiev } 113941d6b093SVladimir Kondratiev 1140dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1141dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1142e00243faSLior David txdata->mid = vif->mid; 114341d6b093SVladimir Kondratiev txdata->enabled = 1; 1144dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 114541d6b093SVladimir Kondratiev 114641d6b093SVladimir Kondratiev return 0; 114741d6b093SVladimir Kondratiev out_free: 1148875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1149230d8442SVladimir Kondratiev txdata->enabled = 0; 1150230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1151875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 115296c93589SGidon Studinski wil_vring_free(wil, vring); 115341d6b093SVladimir Kondratiev out: 115441d6b093SVladimir Kondratiev 115541d6b093SVladimir Kondratiev return rc; 115641d6b093SVladimir Kondratiev } 115741d6b093SVladimir Kondratiev 115810590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1159e00243faSLior David struct wil6210_vif *vif, 11602be7d22fSVladimir Kondratiev struct sk_buff *skb) 11612be7d22fSVladimir Kondratiev { 11623df2cd36SVladimir Kondratiev int i; 11633df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1164e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 116596c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 11662be7d22fSVladimir Kondratiev 11673df2cd36SVladimir Kondratiev if (cid < 0) 11683df2cd36SVladimir Kondratiev return NULL; 11693df2cd36SVladimir Kondratiev 11703df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 117196c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 117210590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 117310590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1174230d8442SVladimir Kondratiev continue; 117510590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 117610590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 117710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11788fe59627SVladimir Kondratiev 1179af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1180af3db60aSLazar Alexei eth->h_dest, i); 1181b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11822be7d22fSVladimir Kondratiev return v; 11833df2cd36SVladimir Kondratiev } else { 1184af3db60aSLazar Alexei wil_dbg_txrx(wil, 1185af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1186af3db60aSLazar Alexei i); 11873df2cd36SVladimir Kondratiev return NULL; 11883df2cd36SVladimir Kondratiev } 11893df2cd36SVladimir Kondratiev } 11903df2cd36SVladimir Kondratiev } 11912be7d22fSVladimir Kondratiev 11922be7d22fSVladimir Kondratiev return NULL; 11932be7d22fSVladimir Kondratiev } 11942be7d22fSVladimir Kondratiev 11959202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 11969202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 119754ed90a8SVladimir Kondratiev 119810590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1199e00243faSLior David struct wil6210_vif *vif, 120054ed90a8SVladimir Kondratiev struct sk_buff *skb) 120154ed90a8SVladimir Kondratiev { 120210590c6aSGidon Studinski struct wil_ring *ring; 120354ed90a8SVladimir Kondratiev int i; 120454ed90a8SVladimir Kondratiev u8 cid; 120510590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 120696c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 120754ed90a8SVladimir Kondratiev 120854ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 120954ed90a8SVladimir Kondratiev * for the AP we connected to. 1210230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 121154ed90a8SVladimir Kondratiev */ 121296c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 121310590c6aSGidon Studinski ring = &wil->ring_tx[i]; 121410590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 121510590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 121654ed90a8SVladimir Kondratiev continue; 121754ed90a8SVladimir Kondratiev 121810590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 121941d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 122041d6b093SVladimir Kondratiev continue; 122141d6b093SVladimir Kondratiev 122210590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 122310590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1224230d8442SVladimir Kondratiev continue; 122554ed90a8SVladimir Kondratiev 122654ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 122754ed90a8SVladimir Kondratiev 122810590c6aSGidon Studinski return ring; 122954ed90a8SVladimir Kondratiev } 123054ed90a8SVladimir Kondratiev 123110590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 123254ed90a8SVladimir Kondratiev 123354ed90a8SVladimir Kondratiev return NULL; 123454ed90a8SVladimir Kondratiev } 123554ed90a8SVladimir Kondratiev 123670812421SVladimir Kondratiev /* Use one of 2 strategies: 123770812421SVladimir Kondratiev * 123870812421SVladimir Kondratiev * 1. New (real broadcast): 123970812421SVladimir Kondratiev * use dedicated broadcast vring 124070812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 124170812421SVladimir Kondratiev * Find 1-st vring and return it; 124270812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 124370812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 124470812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 124570812421SVladimir Kondratiev * - for PBSS 124670812421SVladimir Kondratiev */ 124710590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1248e00243faSLior David struct wil6210_vif *vif, 1249fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1250fb3cac57SVladimir Kondratiev { 125110590c6aSGidon Studinski struct wil_ring *v; 125210590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 125310590c6aSGidon Studinski int i = vif->bcast_ring; 1254fb3cac57SVladimir Kondratiev 125541d6b093SVladimir Kondratiev if (i < 0) 125641d6b093SVladimir Kondratiev return NULL; 125710590c6aSGidon Studinski v = &wil->ring_tx[i]; 125810590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1259b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1260fb3cac57SVladimir Kondratiev return NULL; 126110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 126210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1263230d8442SVladimir Kondratiev return NULL; 1264fb3cac57SVladimir Kondratiev 1265fb3cac57SVladimir Kondratiev return v; 1266fb3cac57SVladimir Kondratiev } 1267fb3cac57SVladimir Kondratiev 126870812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 126970812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 127070812421SVladimir Kondratiev { 127170812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 127210590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 127370812421SVladimir Kondratiev 127470812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 127570812421SVladimir Kondratiev } 127670812421SVladimir Kondratiev 127710590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1278e00243faSLior David struct wil6210_vif *vif, 127970812421SVladimir Kondratiev struct sk_buff *skb) 128070812421SVladimir Kondratiev { 128110590c6aSGidon Studinski struct wil_ring *v, *v2; 128270812421SVladimir Kondratiev struct sk_buff *skb2; 128370812421SVladimir Kondratiev int i; 128470812421SVladimir Kondratiev u8 cid; 128570812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 128670812421SVladimir Kondratiev char *src = eth->h_source; 128710590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 128896c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 128970812421SVladimir Kondratiev 129070812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 129196c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 129210590c6aSGidon Studinski v = &wil->ring_tx[i]; 129310590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1294e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 129570812421SVladimir Kondratiev continue; 129670812421SVladimir Kondratiev 129710590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 129870812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 129970812421SVladimir Kondratiev continue; 130010590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 130110590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 130270812421SVladimir Kondratiev continue; 130370812421SVladimir Kondratiev 130470812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 130570812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 130670812421SVladimir Kondratiev continue; 130770812421SVladimir Kondratiev 130870812421SVladimir Kondratiev goto found; 130970812421SVladimir Kondratiev } 131070812421SVladimir Kondratiev 131170812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 131270812421SVladimir Kondratiev 131370812421SVladimir Kondratiev return NULL; 131470812421SVladimir Kondratiev 131570812421SVladimir Kondratiev found: 131670812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 131770812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 131870812421SVladimir Kondratiev 131970812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 132070812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 132110590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 132210590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1323e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 132470812421SVladimir Kondratiev continue; 132510590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 132670812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 132770812421SVladimir Kondratiev continue; 132810590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 132910590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 133070812421SVladimir Kondratiev continue; 133170812421SVladimir Kondratiev 133270812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 133370812421SVladimir Kondratiev continue; 133470812421SVladimir Kondratiev 133570812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 133670812421SVladimir Kondratiev if (skb2) { 133770812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 133870812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 13399202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 134066449740SLior David /* successful call to wil_tx_ring takes skb2 ref */ 134166449740SLior David dev_kfree_skb_any(skb2); 134270812421SVladimir Kondratiev } else { 134370812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 134470812421SVladimir Kondratiev } 134570812421SVladimir Kondratiev } 134670812421SVladimir Kondratiev 134770812421SVladimir Kondratiev return v; 134870812421SVladimir Kondratiev } 134970812421SVladimir Kondratiev 1350c236658fSVladimir Kondratiev static inline 1351c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1352c236658fSVladimir Kondratiev { 13533d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1354c236658fSVladimir Kondratiev } 1355c236658fSVladimir Kondratiev 13563d4bde15SVladimir Kondratiev /** 13573d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13583d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13593d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13603d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13613d4bde15SVladimir Kondratiev */ 13623d4bde15SVladimir Kondratiev 13633d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13643d4bde15SVladimir Kondratiev struct sk_buff *skb, 13653d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13663d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1367504937d4SKirshenbaum Erez { 13683d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13693d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13703d4bde15SVladimir Kondratiev 13713d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13723d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13733d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13743d4bde15SVladimir Kondratiev 13753d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13763d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13773d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13783d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13793d4bde15SVladimir Kondratiev 13803d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13813d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13823d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13833d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13843d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13853d4bde15SVladimir Kondratiev } 13863d4bde15SVladimir Kondratiev 13873d4bde15SVladimir Kondratiev /** 13883d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13893d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13903d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13913d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13923d4bde15SVladimir Kondratiev * 13933d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13943d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13953d4bde15SVladimir Kondratiev */ 13963d4bde15SVladimir Kondratiev 13973d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13983d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1399504937d4SKirshenbaum Erez int protocol; 1400504937d4SKirshenbaum Erez 1401504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1402504937d4SKirshenbaum Erez return 0; 1403504937d4SKirshenbaum Erez 1404df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1405df2d08eeSVladimir Kondratiev 1406504937d4SKirshenbaum Erez switch (skb->protocol) { 1407504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1408504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1409df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1410504937d4SKirshenbaum Erez break; 1411504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1412504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1413504937d4SKirshenbaum Erez break; 1414504937d4SKirshenbaum Erez default: 1415504937d4SKirshenbaum Erez return -EINVAL; 1416504937d4SKirshenbaum Erez } 1417504937d4SKirshenbaum Erez 1418504937d4SKirshenbaum Erez switch (protocol) { 1419504937d4SKirshenbaum Erez case IPPROTO_TCP: 1420504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1421504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1422504937d4SKirshenbaum Erez d->dma.d0 |= 1423504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1424504937d4SKirshenbaum Erez break; 1425504937d4SKirshenbaum Erez case IPPROTO_UDP: 1426504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1427504937d4SKirshenbaum Erez d->dma.d0 |= 1428504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1429504937d4SKirshenbaum Erez break; 1430504937d4SKirshenbaum Erez default: 1431504937d4SKirshenbaum Erez return -EINVAL; 1432504937d4SKirshenbaum Erez } 1433504937d4SKirshenbaum Erez 1434504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1435504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1436504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1437504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1438504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1439504937d4SKirshenbaum Erez 1440504937d4SKirshenbaum Erez return 0; 1441504937d4SKirshenbaum Erez } 1442504937d4SKirshenbaum Erez 14433d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14443d4bde15SVladimir Kondratiev { 14453d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14463d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14473d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14483d4bde15SVladimir Kondratiev } 14493d4bde15SVladimir Kondratiev 14503d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14513d4bde15SVladimir Kondratiev { 14523d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14533d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14543d4bde15SVladimir Kondratiev } 14553d4bde15SVladimir Kondratiev 1456e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 145710590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 14583d4bde15SVladimir Kondratiev { 14593d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14603d4bde15SVladimir Kondratiev 14613d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14623d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14633d4bde15SVladimir Kondratiev *_first_desc = NULL; 14643d4bde15SVladimir Kondratiev 14653d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14663d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14673d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14683d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14693d4bde15SVladimir Kondratiev 14703d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14713d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14723d4bde15SVladimir Kondratiev 14733d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14743d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14753d4bde15SVladimir Kondratiev 14763d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 147710590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14783d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14793d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14803d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14813d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 148210590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 148310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14843d4bde15SVladimir Kondratiev uint i = swhead; 14853d4bde15SVladimir Kondratiev dma_addr_t pa; 14863d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14873d4bde15SVladimir Kondratiev int rem_data = mss; 14883d4bde15SVladimir Kondratiev int lenmss; 14893d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14903d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14913d4bde15SVladimir Kondratiev bool is_ipv4; 14923d4bde15SVladimir Kondratiev int tcp_hdr_len; 14933d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14943d4bde15SVladimir Kondratiev int gso_type; 1495e3d2ed94SHamad Kadmany int rc = -EINVAL; 14963d4bde15SVladimir Kondratiev 1497af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1498af3db60aSLazar Alexei vring_index); 14993d4bde15SVladimir Kondratiev 15003d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 15013d4bde15SVladimir Kondratiev return -EINVAL; 15023d4bde15SVladimir Kondratiev 15033d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 15043d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 15053d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 15063d4bde15SVladimir Kondratiev * this is the initial check only. 15073d4bde15SVladimir Kondratiev */ 15083d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 15093d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 15103d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 15113d4bde15SVladimir Kondratiev vring_index, min_desc_required); 15123d4bde15SVladimir Kondratiev return -ENOMEM; 15133d4bde15SVladimir Kondratiev } 15143d4bde15SVladimir Kondratiev 15153d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 15163d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 15173d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 15183d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 15193d4bde15SVladimir Kondratiev 15203d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 15213d4bde15SVladimir Kondratiev switch (gso_type) { 15223d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 15233d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 15243d4bde15SVladimir Kondratiev * as required by the offloading doc 15253d4bde15SVladimir Kondratiev */ 15263d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 15273d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 15283d4bde15SVladimir Kondratiev is_ipv4 = true; 15293d4bde15SVladimir Kondratiev break; 15303d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 15313d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15323d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15333d4bde15SVladimir Kondratiev is_ipv4 = false; 15343d4bde15SVladimir Kondratiev break; 15353d4bde15SVladimir Kondratiev default: 15363d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15373d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15383d4bde15SVladimir Kondratiev */ 15393d4bde15SVladimir Kondratiev return -EINVAL; 15403d4bde15SVladimir Kondratiev } 15413d4bde15SVladimir Kondratiev 15423d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15433d4bde15SVladimir Kondratiev return -EINVAL; 15443d4bde15SVladimir Kondratiev 15453d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15463d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15473d4bde15SVladimir Kondratiev */ 15483d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15493d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15503d4bde15SVladimir Kondratiev 155110590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 15523d4bde15SVladimir Kondratiev 15533d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15543d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15553d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15563d4bde15SVladimir Kondratiev goto err_exit; 15573d4bde15SVladimir Kondratiev } 15583d4bde15SVladimir Kondratiev 15599202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 15609202d7b6SMaya Erez hdrlen, vring_index); 15613d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15623d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15633d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15643d4bde15SVladimir Kondratiev 15653d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15663d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15673d4bde15SVladimir Kondratiev 15683d4bde15SVladimir Kondratiev descs_used++; 15693d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15703d4bde15SVladimir Kondratiev 15713d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15723d4bde15SVladimir Kondratiev if (headlen) { 15733d4bde15SVladimir Kondratiev len = headlen; 15743d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15753d4bde15SVladimir Kondratiev len); 15763d4bde15SVladimir Kondratiev } else { 15773d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15783d4bde15SVladimir Kondratiev len = frag->size; 15793d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15803d4bde15SVladimir Kondratiev } 15813d4bde15SVladimir Kondratiev 15823d4bde15SVladimir Kondratiev while (len) { 15833d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15843d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15853d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15863d4bde15SVladimir Kondratiev 15873d4bde15SVladimir Kondratiev if (descs_used == avail) { 1588e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1589e3d2ed94SHamad Kadmany rc = -ENOMEM; 1590e3d2ed94SHamad Kadmany goto mem_error; 15913d4bde15SVladimir Kondratiev } 15923d4bde15SVladimir Kondratiev 15933d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15943d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15953d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15963d4bde15SVladimir Kondratiev 15973d4bde15SVladimir Kondratiev if (!headlen) { 15983d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15993d4bde15SVladimir Kondratiev frag->size - len, lenmss, 16003d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 16013d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 16023d4bde15SVladimir Kondratiev } else { 16033d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 16043d4bde15SVladimir Kondratiev skb->data + 16053d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 16063d4bde15SVladimir Kondratiev lenmss, 16073d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 16083d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 16093d4bde15SVladimir Kondratiev headlen -= lenmss; 16103d4bde15SVladimir Kondratiev } 16113d4bde15SVladimir Kondratiev 1612e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1613e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1614e3d2ed94SHamad Kadmany goto mem_error; 1615e3d2ed94SHamad Kadmany } 16163d4bde15SVladimir Kondratiev 161710590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 16183d4bde15SVladimir Kondratiev 16193d4bde15SVladimir Kondratiev if (!_first_desc) { 16203d4bde15SVladimir Kondratiev _first_desc = _desc; 16213d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 16223d4bde15SVladimir Kondratiev d = first_desc; 16233d4bde15SVladimir Kondratiev } else { 16243d4bde15SVladimir Kondratiev d = &desc_mem; 16253d4bde15SVladimir Kondratiev } 16263d4bde15SVladimir Kondratiev 16279202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 16289202d7b6SMaya Erez pa, lenmss, vring_index); 16293d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 16303d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 16313d4bde15SVladimir Kondratiev skb_net_hdr_len); 16323d4bde15SVladimir Kondratiev 16333d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16343d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16353d4bde15SVladimir Kondratiev 16363d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16373d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16383d4bde15SVladimir Kondratiev len -= lenmss; 16393d4bde15SVladimir Kondratiev rem_data -= lenmss; 16403d4bde15SVladimir Kondratiev 16413d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16423d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16433d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16443d4bde15SVladimir Kondratiev 16453d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16463d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16473d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16483d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16493d4bde15SVladimir Kondratiev * release 16503d4bde15SVladimir Kondratiev */ 16513d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16523d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16533d4bde15SVladimir Kondratiev sg_desc_cnt + 16543d4bde15SVladimir Kondratiev 1); 16553d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16563d4bde15SVladimir Kondratiev } else { 16573d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16583d4bde15SVladimir Kondratiev sg_desc_cnt); 16593d4bde15SVladimir Kondratiev } 16603d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16613d4bde15SVladimir Kondratiev 16623d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16633d4bde15SVladimir Kondratiev 16643d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16653d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16663d4bde15SVladimir Kondratiev * it twice 16673d4bde15SVladimir Kondratiev */ 16683d4bde15SVladimir Kondratiev if (first_desc != d) 16693d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16703d4bde15SVladimir Kondratiev 16713d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16723d4bde15SVladimir Kondratiev * of this TS processing 16733d4bde15SVladimir Kondratiev */ 16743d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16753d4bde15SVladimir Kondratiev *_desc = *d; 16763d4bde15SVladimir Kondratiev 16773d4bde15SVladimir Kondratiev rem_data = mss; 16783d4bde15SVladimir Kondratiev _first_desc = NULL; 16793d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16803d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16813d4bde15SVladimir Kondratiev *_desc = *d; 16823d4bde15SVladimir Kondratiev } 16833d4bde15SVladimir Kondratiev } 16843d4bde15SVladimir Kondratiev 16853d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16863d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16873d4bde15SVladimir Kondratiev */ 16883d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16893d4bde15SVladimir Kondratiev d = first_desc; 16903d4bde15SVladimir Kondratiev 16913d4bde15SVladimir Kondratiev /* Last data descriptor */ 16923d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16933d4bde15SVladimir Kondratiev *_desc = *d; 16943d4bde15SVladimir Kondratiev 16953d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16963d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16973d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16983d4bde15SVladimir Kondratiev 16993d4bde15SVladimir Kondratiev /* hold reference to skb 17003d4bde15SVladimir Kondratiev * to prevent skb release before accounting 17013d4bde15SVladimir Kondratiev * in case of immediate "tx done" 17023d4bde15SVladimir Kondratiev */ 17033d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 17043d4bde15SVladimir Kondratiev 17053d4bde15SVladimir Kondratiev /* performance monitoring */ 170610590c6aSGidon Studinski used = wil_ring_used_tx(vring); 170710590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 17083d4bde15SVladimir Kondratiev used, used + descs_used)) { 17093d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 17103d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 17113d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 17123d4bde15SVladimir Kondratiev } 17133d4bde15SVladimir Kondratiev 1714eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1715eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1716eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1717eb26cff1SMaya Erez * skb before it was completed. 1718eb26cff1SMaya Erez */ 1719eb26cff1SMaya Erez wmb(); 1720eb26cff1SMaya Erez 17213d4bde15SVladimir Kondratiev /* advance swhead */ 172210590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1723e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 17243d4bde15SVladimir Kondratiev 17253d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 17263d4bde15SVladimir Kondratiev * committing them to HW 17273d4bde15SVladimir Kondratiev */ 17283d4bde15SVladimir Kondratiev wmb(); 17293d4bde15SVladimir Kondratiev 1730a24a3d6aSDedy Lansky if (wil->tx_latency) 1731a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1732a24a3d6aSDedy Lansky else 1733a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1734a24a3d6aSDedy Lansky 1735b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 17363d4bde15SVladimir Kondratiev return 0; 17373d4bde15SVladimir Kondratiev 1738e3d2ed94SHamad Kadmany mem_error: 17393d4bde15SVladimir Kondratiev while (descs_used > 0) { 17403d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17413d4bde15SVladimir Kondratiev 1742a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 174310590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 174410590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 17453d4bde15SVladimir Kondratiev *d = *_desc; 17463d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17473d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17489202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 17493d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17503d4bde15SVladimir Kondratiev descs_used--; 17513d4bde15SVladimir Kondratiev } 17523d4bde15SVladimir Kondratiev err_exit: 1753e3d2ed94SHamad Kadmany return rc; 17543d4bde15SVladimir Kondratiev } 17553d4bde15SVladimir Kondratiev 17569202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 17579202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 17582be7d22fSVladimir Kondratiev { 17592be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 176068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 176168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17629202d7b6SMaya Erez u32 swhead = ring->swhead; 17639202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 17642be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1765504937d4SKirshenbaum Erez uint f = 0; 17669202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 17679202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 17682be7d22fSVladimir Kondratiev uint i = swhead; 17692be7d22fSVladimir Kondratiev dma_addr_t pa; 17700436fd9aSVladimir Shulman int used; 17719202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 177241d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17732be7d22fSVladimir Kondratiev 177410590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 17759202d7b6SMaya Erez skb->len, ring_index, nr_frags); 17762be7d22fSVladimir Kondratiev 17775933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17785933a06dSVladimir Kondratiev return -EINVAL; 17795933a06dSVladimir Kondratiev 178033c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 178170801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17825b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17839202d7b6SMaya Erez ring_index, 1 + nr_frags); 17842be7d22fSVladimir Kondratiev return -ENOMEM; 17852be7d22fSVladimir Kondratiev } 17869202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 17872be7d22fSVladimir Kondratiev 17888fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17892be7d22fSVladimir Kondratiev 17909202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 17915b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17927743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17932be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17942be7d22fSVladimir Kondratiev 17952be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17962be7d22fSVladimir Kondratiev return -EINVAL; 17979202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 17982be7d22fSVladimir Kondratiev /* 1-st segment */ 17999202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 18009202d7b6SMaya Erez ring_index); 180141d6b093SVladimir Kondratiev if (unlikely(mcast)) { 180241d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1803230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 180441d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 180541d6b093SVladimir Kondratiev } 1806504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 18073d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 18085b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 18099202d7b6SMaya Erez ring_index); 1810504937d4SKirshenbaum Erez goto dma_error; 1811504937d4SKirshenbaum Erez } 1812504937d4SKirshenbaum Erez 18139202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 18143d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 181568ada71eSVladimir Kondratiev 18162be7d22fSVladimir Kondratiev /* middle segments */ 1817504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 18182be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 18192be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 18202be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 18218fe59627SVladimir Kondratiev 1822e59d16c0SVladimir Kondratiev *_d = *d; 18239202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18245b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18255b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18269202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 18279202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 18282be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 18292be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1830e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1831e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 18329202d7b6SMaya Erez ring_index); 18332be7d22fSVladimir Kondratiev goto dma_error; 1834e3d2ed94SHamad Kadmany } 18359202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 18369202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 18379202d7b6SMaya Erez pa, len, ring_index); 1838c236658fSVladimir Kondratiev /* no need to check return code - 1839c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1840c236658fSVladimir Kondratiev * it will succeed here too 1841c236658fSVladimir Kondratiev */ 18423d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18432be7d22fSVladimir Kondratiev } 18442be7d22fSVladimir Kondratiev /* for the last seg only */ 18452be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1846668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18472be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 184868ada71eSVladimir Kondratiev *_d = *d; 18499202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 18505b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18515b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18522be7d22fSVladimir Kondratiev 18536cdadd4dSVladimir Kondratiev /* hold reference to skb 18546cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18556cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18566cdadd4dSVladimir Kondratiev */ 18579202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 18586cdadd4dSVladimir Kondratiev 18590436fd9aSVladimir Shulman /* performance monitoring */ 18609202d7b6SMaya Erez used = wil_ring_used_tx(ring); 186110590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 18620436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18637c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18640436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18659202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 18660436fd9aSVladimir Shulman } 18677c0acf86SVladimir Kondratiev 1868eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1869eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1870eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1871eb26cff1SMaya Erez * skb before it was completed. 1872eb26cff1SMaya Erez */ 1873eb26cff1SMaya Erez wmb(); 1874eb26cff1SMaya Erez 18752be7d22fSVladimir Kondratiev /* advance swhead */ 18769202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 18779202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 18789202d7b6SMaya Erez ring->swhead); 18799202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 18803d4bde15SVladimir Kondratiev 18813d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18823d4bde15SVladimir Kondratiev * committing them to HW 18833d4bde15SVladimir Kondratiev */ 18843d4bde15SVladimir Kondratiev wmb(); 18853d4bde15SVladimir Kondratiev 1886a24a3d6aSDedy Lansky if (wil->tx_latency) 1887a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1888a24a3d6aSDedy Lansky else 1889a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 1890a24a3d6aSDedy Lansky 18919202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 18922be7d22fSVladimir Kondratiev 18932be7d22fSVladimir Kondratiev return 0; 18942be7d22fSVladimir Kondratiev dma_error: 18952be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1896c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1897c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1898c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18997e594444SVladimir Kondratiev 19009202d7b6SMaya Erez i = (swhead + f) % ring->size; 19019202d7b6SMaya Erez ctx = &ring->ctx[i]; 19029202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 190368ada71eSVladimir Kondratiev *d = *_d; 190468ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 19059202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 19069202d7b6SMaya Erez (union wil_tx_desc *)d, 19079202d7b6SMaya Erez ctx); 1908f88f113aSVladimir Kondratiev 1909f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 19102be7d22fSVladimir Kondratiev } 19112be7d22fSVladimir Kondratiev 19122be7d22fSVladimir Kondratiev return -EINVAL; 19132be7d22fSVladimir Kondratiev } 19142be7d22fSVladimir Kondratiev 19159202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 19169202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 19175933a06dSVladimir Kondratiev { 19189202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 191910590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 19205933a06dSVladimir Kondratiev int rc; 19215933a06dSVladimir Kondratiev 19225933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 19233d4bde15SVladimir Kondratiev 1924fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1925fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1926fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1927fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1928fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1929fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1930fe9ee51eSMaya Erez return -EINVAL; 1931fe9ee51eSMaya Erez } 1932fe9ee51eSMaya Erez 19339202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 19349202d7b6SMaya Erez (wil, vif, ring, skb); 19353d4bde15SVladimir Kondratiev 19365933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 19373d4bde15SVladimir Kondratiev 19385933a06dSVladimir Kondratiev return rc; 19395933a06dSVladimir Kondratiev } 19405933a06dSVladimir Kondratiev 1941f9e3033fSDedy Lansky /** 1942f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 19435bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1944f9e3033fSDedy Lansky * 1945f9e3033fSDedy Lansky * This function does one of two checks: 1946f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1947f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1948f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1949f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1950f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1951f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1952f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1953f9e3033fSDedy Lansky * 1954f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1955f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1956f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1957f9e3033fSDedy Lansky */ 1958f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 19595bd60982SLior David struct wil6210_vif *vif, 196010590c6aSGidon Studinski struct wil_ring *ring, 1961f9e3033fSDedy Lansky bool check_stop) 1962f9e3033fSDedy Lansky { 1963f9e3033fSDedy Lansky int i; 1964df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 1965f9e3033fSDedy Lansky 19665bd60982SLior David if (unlikely(!vif)) 19675bd60982SLior David return; 1968f9e3033fSDedy Lansky 196910590c6aSGidon Studinski if (ring) 19705bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 197110590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19725bd60982SLior David vif->net_queue_stopped); 19735bd60982SLior David else 19745bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19755bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19765bd60982SLior David 19775bd60982SLior David if (check_stop == vif->net_queue_stopped) 1978f9e3033fSDedy Lansky /* net queues already in desired state */ 1979f9e3033fSDedy Lansky return; 1980f9e3033fSDedy Lansky 1981f9e3033fSDedy Lansky if (check_stop) { 198210590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1983f9e3033fSDedy Lansky /* not enough room in the vring */ 19845bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19855bd60982SLior David vif->net_queue_stopped = true; 1986f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1987f9e3033fSDedy Lansky } 1988f9e3033fSDedy Lansky return; 1989f9e3033fSDedy Lansky } 1990f9e3033fSDedy Lansky 1991fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1992fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1993fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1994fe9ee51eSMaya Erez return; 1995fe9ee51eSMaya Erez 1996f9e3033fSDedy Lansky /* check wake */ 1997df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 199810590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 199910590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 2000f9e3033fSDedy Lansky 200110590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 200210590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 2003f9e3033fSDedy Lansky continue; 2004f9e3033fSDedy Lansky 200510590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 200610590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 200710590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 2008f9e3033fSDedy Lansky return; 2009f9e3033fSDedy Lansky } 2010f9e3033fSDedy Lansky } 2011f9e3033fSDedy Lansky 201210590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 201310590c6aSGidon Studinski /* enough room in the ring */ 2014f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 20155bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 20165bd60982SLior David vif->net_queue_stopped = false; 2017f9e3033fSDedy Lansky } 2018f9e3033fSDedy Lansky } 2019f9e3033fSDedy Lansky 20205bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 202110590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2022f9e3033fSDedy Lansky { 2023f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 202410590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2025f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2026f9e3033fSDedy Lansky } 2027f9e3033fSDedy Lansky 20285bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 202910590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2030f9e3033fSDedy Lansky { 2031f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 203210590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2033f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2034f9e3033fSDedy Lansky } 2035f9e3033fSDedy Lansky 20362be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 20372be7d22fSVladimir Kondratiev { 2038e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2039e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 20403df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 204141d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 20429202d7b6SMaya Erez struct wil_ring *ring; 2043aa27deaaSVladimir Kondratiev static bool pr_once_fw; 20442be7d22fSVladimir Kondratiev int rc; 20452be7d22fSVladimir Kondratiev 2046af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 204733c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2048aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20492be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2050aa27deaaSVladimir Kondratiev pr_once_fw = true; 2051aa27deaaSVladimir Kondratiev } 20522be7d22fSVladimir Kondratiev goto drop; 20532be7d22fSVladimir Kondratiev } 20545bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 20555bd60982SLior David wil_dbg_ratelimited(wil, 20565bd60982SLior David "VIF not connected, packet dropped\n"); 20572be7d22fSVladimir Kondratiev goto drop; 20582be7d22fSVladimir Kondratiev } 2059e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20602be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20612be7d22fSVladimir Kondratiev goto drop; 20622be7d22fSVladimir Kondratiev } 2063aa27deaaSVladimir Kondratiev pr_once_fw = false; 2064d58db4e4SVladimir Kondratiev 20652be7d22fSVladimir Kondratiev /* find vring */ 2066e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2067a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 20689202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2069a895cb8bSLior David } else if (bcast) { 2070e00243faSLior David if (vif->pbss) 2071a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2072a895cb8bSLior David * all stations VRINGs 2073a895cb8bSLior David */ 20749202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2075e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2076a895cb8bSLior David /* AP has a dedicated bcast VRING */ 20779202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2078a895cb8bSLior David else 2079a895cb8bSLior David /* unexpected combination, fallback to duplicating 2080a895cb8bSLior David * the skb in all stations VRINGs 2081a895cb8bSLior David */ 20829202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2083a895cb8bSLior David } else { 2084a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 20859202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 208654ed90a8SVladimir Kondratiev } 20879202d7b6SMaya Erez if (unlikely(!ring)) { 208810590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20892be7d22fSVladimir Kondratiev goto drop; 20902be7d22fSVladimir Kondratiev } 20912be7d22fSVladimir Kondratiev /* set up vring entry */ 20929202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2093d58db4e4SVladimir Kondratiev 20942be7d22fSVladimir Kondratiev switch (rc) { 20952be7d22fSVladimir Kondratiev case 0: 2096f9e3033fSDedy Lansky /* shall we stop net queues? */ 20979202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2098795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20992be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 21002be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 21012be7d22fSVladimir Kondratiev case -ENOMEM: 21022be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 21032be7d22fSVladimir Kondratiev default: 2104afda8bb5SVladimir Kondratiev break; /* goto drop; */ 21052be7d22fSVladimir Kondratiev } 21062be7d22fSVladimir Kondratiev drop: 21072be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 21082be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 21092be7d22fSVladimir Kondratiev 21102be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 21112be7d22fSVladimir Kondratiev } 21122be7d22fSVladimir Kondratiev 2113a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2114a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2115a24a3d6aSDedy Lansky { 2116a24a3d6aSDedy Lansky int skb_time_us; 2117a24a3d6aSDedy Lansky int bin; 2118a24a3d6aSDedy Lansky 2119a24a3d6aSDedy Lansky if (!wil->tx_latency) 2120a24a3d6aSDedy Lansky return; 2121a24a3d6aSDedy Lansky 2122a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2123a24a3d6aSDedy Lansky return; 2124a24a3d6aSDedy Lansky 2125a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2126a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2127a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2128a24a3d6aSDedy Lansky 2129a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2130a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2131a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2132a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2133a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2134a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2135a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2136a24a3d6aSDedy Lansky } 2137a24a3d6aSDedy Lansky 21382be7d22fSVladimir Kondratiev /** 21392be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 21402be7d22fSVladimir Kondratiev * 2141e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2142e0287c4aSVladimir Kondratiev * 21432be7d22fSVladimir Kondratiev * Safe to call from IRQ 21442be7d22fSVladimir Kondratiev */ 21455bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 21462be7d22fSVladimir Kondratiev { 21475bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 21485bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 21492be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 215010590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 215110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2152e0287c4aSVladimir Kondratiev int done = 0; 215310590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 215441d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2155c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 21560436fd9aSVladimir Shulman int used_before_complete; 21570436fd9aSVladimir Shulman int used_new; 21582be7d22fSVladimir Kondratiev 215933c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21602be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2161e0287c4aSVladimir Kondratiev return 0; 21622be7d22fSVladimir Kondratiev } 21632be7d22fSVladimir Kondratiev 216433c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2165097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2166097638a0SVladimir Kondratiev return 0; 2167097638a0SVladimir Kondratiev } 2168097638a0SVladimir Kondratiev 2169af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21702be7d22fSVladimir Kondratiev 217110590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 21720436fd9aSVladimir Shulman 217341d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 217441d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 217541d6b093SVladimir Kondratiev 217610590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2177c236658fSVladimir Kondratiev int new_swtail; 2178c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2179c236658fSVladimir Kondratiev /** 2180c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21813d4bde15SVladimir Kondratiev * last fragment. look for it. 21823d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2183c236658fSVladimir Kondratiev */ 2184c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2185c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2186c236658fSVladimir Kondratiev 218710590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 218833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2189c236658fSVladimir Kondratiev break; 2190c236658fSVladimir Kondratiev 2191c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2192c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21934de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21947e594444SVladimir Kondratiev u16 dmalen; 219576dfa4b7SVladimir Kondratiev struct sk_buff *skb; 219676dfa4b7SVladimir Kondratiev 219776dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 219876dfa4b7SVladimir Kondratiev skb = ctx->skb; 219910590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 22004de41befSVladimir Kondratiev 220168ada71eSVladimir Kondratiev *d = *_d; 22024de41befSVladimir Kondratiev 22037e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 220498658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 220598658095SVladimir Kondratiev d->dma.error); 22067743882dSVladimir Kondratiev wil_dbg_txrx(wil, 22075b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 22085b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 22095b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 22105b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 22112be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 22122be7d22fSVladimir Kondratiev 22139202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 22149202d7b6SMaya Erez (union wil_tx_desc *)d, 22159202d7b6SMaya Erez ctx); 2216f88f113aSVladimir Kondratiev 22172be7d22fSVladimir Kondratiev if (skb) { 221833c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2219795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2220795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 222141d6b093SVladimir Kondratiev if (stats) { 222241d6b093SVladimir Kondratiev stats->tx_packets++; 2223c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2224a24a3d6aSDedy Lansky 2225a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2226a24a3d6aSDedy Lansky &wil->sta[cid]); 222741d6b093SVladimir Kondratiev } 2228795ce734SVladimir Kondratiev } else { 2229795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 223041d6b093SVladimir Kondratiev if (stats) 2231c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2232795ce734SVladimir Kondratiev } 2233713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 22342be7d22fSVladimir Kondratiev } 2235f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2236eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 223710590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2238eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2239eb26cff1SMaya Erez * is completed. 2240eb26cff1SMaya Erez */ 2241eb26cff1SMaya Erez wmb(); 2242c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 224303269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 224403269c65SVladimir Kondratiev * so hardware will not try to process this desc., 224503269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 224603269c65SVladimir Kondratiev */ 224710590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2248e0287c4aSVladimir Kondratiev done++; 22492be7d22fSVladimir Kondratiev } 2250c236658fSVladimir Kondratiev } 225167c3e1b4SVladimir Kondratiev 22520436fd9aSVladimir Shulman /* performance monitoring */ 225310590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 225410590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 22550436fd9aSVladimir Shulman used_new, used_before_complete)) { 22560436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 22570436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 22587c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 22597c0acf86SVladimir Kondratiev } 226067c3e1b4SVladimir Kondratiev 2261f9e3033fSDedy Lansky /* shall we wake net queues? */ 2262f9e3033fSDedy Lansky if (done) 22635bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2264e0287c4aSVladimir Kondratiev 2265e0287c4aSVladimir Kondratiev return done; 22662be7d22fSVladimir Kondratiev } 226796c93589SGidon Studinski 226896c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 226996c93589SGidon Studinski { 227096c93589SGidon Studinski return 0; 227196c93589SGidon Studinski } 227296c93589SGidon Studinski 227396c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 227496c93589SGidon Studinski 22757be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 22767be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 22771bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 22787be13fc3SGidon Studinski { 22797be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 22807be13fc3SGidon Studinski 22817be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 22827be13fc3SGidon Studinski *cid = wil_rxdesc_cid(d); 22837be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 22847be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 22857be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 22861bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 22877be13fc3SGidon Studinski } 22887be13fc3SGidon Studinski 228996c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 229096c93589SGidon Studinski { 229196c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 229296c93589SGidon Studinski wil_configure_interrupt_moderation; 229396c93589SGidon Studinski /* TX ops */ 22949202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 22959202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 22969202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 229796c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 229896c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 229996c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 230096c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 230196c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 2302b9010f10SAhmad Masri wil->txrx_ops.tx_ring_modify = wil_tx_vring_modify; 230396c93589SGidon Studinski /* RX ops */ 230496c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 23057be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 23067be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 23077be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 23087be13fc3SGidon Studinski wil_get_netif_rx_params; 23097be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2310e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 23117be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 231296c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 231396c93589SGidon Studinski } 2314