12be7d22fSVladimir Kondratiev /* 2af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 3e00243faSLior David * Copyright (c) 2018, The Linux Foundation. All rights reserved. 42be7d22fSVladimir Kondratiev * 52be7d22fSVladimir Kondratiev * Permission to use, copy, modify, and/or distribute this software for any 62be7d22fSVladimir Kondratiev * purpose with or without fee is hereby granted, provided that the above 72be7d22fSVladimir Kondratiev * copyright notice and this permission notice appear in all copies. 82be7d22fSVladimir Kondratiev * 92be7d22fSVladimir Kondratiev * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 102be7d22fSVladimir Kondratiev * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 112be7d22fSVladimir Kondratiev * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 122be7d22fSVladimir Kondratiev * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 132be7d22fSVladimir Kondratiev * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 142be7d22fSVladimir Kondratiev * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 152be7d22fSVladimir Kondratiev * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 162be7d22fSVladimir Kondratiev */ 172be7d22fSVladimir Kondratiev 182be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 192be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 202be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 212be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 22504937d4SKirshenbaum Erez #include <linux/ip.h> 23504937d4SKirshenbaum Erez #include <linux/ipv6.h> 24504937d4SKirshenbaum Erez #include <net/ipv6.h> 250786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 262be7d22fSVladimir Kondratiev 272be7d22fSVladimir Kondratiev #include "wil6210.h" 282be7d22fSVladimir Kondratiev #include "wmi.h" 292be7d22fSVladimir Kondratiev #include "txrx.h" 3098658095SVladimir Kondratiev #include "trace.h" 312be7d22fSVladimir Kondratiev 322be7d22fSVladimir Kondratiev static bool rtap_include_phy_info; 3378484c44SMaya Erez module_param(rtap_include_phy_info, bool, 0444); 342be7d22fSVladimir Kondratiev MODULE_PARM_DESC(rtap_include_phy_info, 352be7d22fSVladimir Kondratiev " Include PHY info in the radiotap header, default - no"); 362be7d22fSVladimir Kondratiev 37c406ea7cSVladimir Kondratiev bool rx_align_2; 3878484c44SMaya Erez module_param(rx_align_2, bool, 0444); 39c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 40c406ea7cSVladimir Kondratiev 4152a45702SLior David bool rx_large_buf; 4252a45702SLior David module_param(rx_large_buf, bool, 0444); 4352a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 4452a45702SLior David 45c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 46c406ea7cSVladimir Kondratiev { 47c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 48c406ea7cSVladimir Kondratiev } 49c406ea7cSVladimir Kondratiev 5010590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 5110590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 522be7d22fSVladimir Kondratiev { 5310590c6aSGidon Studinski return ring->size / 8; 542be7d22fSVladimir Kondratiev } 552be7d22fSVladimir Kondratiev 5610590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 5710590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 582be7d22fSVladimir Kondratiev { 5910590c6aSGidon Studinski return ring->size / 4; 605bb6423eSVladimir Kondratiev } 615bb6423eSVladimir Kondratiev 62f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 6310590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 64f9e3033fSDedy Lansky { 6510590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 66f9e3033fSDedy Lansky } 67f9e3033fSDedy Lansky 68f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 6910590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 70f9e3033fSDedy Lansky { 7110590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 72f9e3033fSDedy Lansky } 73f9e3033fSDedy Lansky 74fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 75fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 76fe9ee51eSMaya Erez { 77fe9ee51eSMaya Erez int i; 78fe9ee51eSMaya Erez unsigned long data_comp_to; 79fe9ee51eSMaya Erez 80fe9ee51eSMaya Erez for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 8110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 8210590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 8310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 8410590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 85fe9ee51eSMaya Erez 86fe9ee51eSMaya Erez spin_lock(&txdata->lock); 87fe9ee51eSMaya Erez 88fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 89fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 90fe9ee51eSMaya Erez continue; 91fe9ee51eSMaya Erez } 92fe9ee51eSMaya Erez 93fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 94fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 95fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 9610590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 97fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 98fe9ee51eSMaya Erez wil_dbg_pm(wil, 99fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 100fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 101fe9ee51eSMaya Erez return false; 102fe9ee51eSMaya Erez } 103fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 104fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 105fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 106fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 107fe9ee51eSMaya Erez msleep(20); 108fe9ee51eSMaya Erez spin_lock(&txdata->lock); 109fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 110fe9ee51eSMaya Erez break; 111fe9ee51eSMaya Erez } 112fe9ee51eSMaya Erez } 113fe9ee51eSMaya Erez 114fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 115fe9ee51eSMaya Erez } 116fe9ee51eSMaya Erez 117fe9ee51eSMaya Erez return true; 118fe9ee51eSMaya Erez } 119fe9ee51eSMaya Erez 1200436fd9aSVladimir Shulman /* wil_val_in_range - check if value in [min,max) */ 1210436fd9aSVladimir Shulman static inline bool wil_val_in_range(int val, int min, int max) 1220436fd9aSVladimir Shulman { 1230436fd9aSVladimir Shulman return val >= min && val < max; 1240436fd9aSVladimir Shulman } 1250436fd9aSVladimir Shulman 12610590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1272be7d22fSVladimir Kondratiev { 1282be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1292be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1302be7d22fSVladimir Kondratiev uint i; 1312be7d22fSVladimir Kondratiev 132af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1339cf10d62SVladimir Kondratiev 1342be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1352be7d22fSVladimir Kondratiev 1362be7d22fSVladimir Kondratiev vring->swhead = 0; 1372be7d22fSVladimir Kondratiev vring->swtail = 0; 138f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1392be7d22fSVladimir Kondratiev if (!vring->ctx) { 1402be7d22fSVladimir Kondratiev vring->va = NULL; 1412be7d22fSVladimir Kondratiev return -ENOMEM; 1422be7d22fSVladimir Kondratiev } 143f2de576dSHamad Kadmany 1440436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 145f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 146f2de576dSHamad Kadmany * 147f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 148f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1493dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1503dc2c13bSLazar Alexei * allocation before allocating vring memory. 151f2de576dSHamad Kadmany * 152f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 153f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 154f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1552be7d22fSVladimir Kondratiev */ 1563dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 157f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 158f2de576dSHamad Kadmany 1592be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1602be7d22fSVladimir Kondratiev if (!vring->va) { 1612be7d22fSVladimir Kondratiev kfree(vring->ctx); 1622be7d22fSVladimir Kondratiev vring->ctx = NULL; 1632be7d22fSVladimir Kondratiev return -ENOMEM; 1642be7d22fSVladimir Kondratiev } 165f2de576dSHamad Kadmany 1663dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1673dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1683dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 169f2de576dSHamad Kadmany 1702be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1712be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1722be7d22fSVladimir Kondratiev * we can use any 1732be7d22fSVladimir Kondratiev */ 1742be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 17510590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 17610590c6aSGidon Studinski &vring->va[i].tx.legacy; 1778fe59627SVladimir Kondratiev 17868ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1792be7d22fSVladimir Kondratiev } 1802be7d22fSVladimir Kondratiev 18139c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 18239c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1832be7d22fSVladimir Kondratiev 1842be7d22fSVladimir Kondratiev return 0; 1852be7d22fSVladimir Kondratiev } 1862be7d22fSVladimir Kondratiev 1872232abd5SVladimir Kondratiev static void wil_txdesc_unmap(struct device *dev, struct vring_tx_desc *d, 1882232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1892232abd5SVladimir Kondratiev { 1902232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1912232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1928fe59627SVladimir Kondratiev 1932232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1942232abd5SVladimir Kondratiev case wil_mapped_as_single: 1952232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1962232abd5SVladimir Kondratiev break; 1972232abd5SVladimir Kondratiev case wil_mapped_as_page: 1982232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1992232abd5SVladimir Kondratiev break; 2002232abd5SVladimir Kondratiev default: 2012232abd5SVladimir Kondratiev break; 2022232abd5SVladimir Kondratiev } 2032232abd5SVladimir Kondratiev } 2042232abd5SVladimir Kondratiev 20510590c6aSGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring, 2062be7d22fSVladimir Kondratiev int tx) 2072be7d22fSVladimir Kondratiev { 2082be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 2092be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 2102be7d22fSVladimir Kondratiev 2119b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 212ef77285fSVladimir Kondratiev if (tx) { 21310590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 214ef77285fSVladimir Kondratiev 215ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 216ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 217ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 218ef77285fSVladimir Kondratiev } else { 219ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 220ef77285fSVladimir Kondratiev vring->size, vring->va, 221ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 222ef77285fSVladimir Kondratiev } 223ef77285fSVladimir Kondratiev 22410590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 22568ada71eSVladimir Kondratiev dma_addr_t pa; 2267e594444SVladimir Kondratiev u16 dmalen; 227f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 22868ada71eSVladimir Kondratiev 2292be7d22fSVladimir Kondratiev if (tx) { 23068ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 23168ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 23210590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 23368ada71eSVladimir Kondratiev 234f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 23534b8886eSMaya Erez if (!ctx) { 23634b8886eSMaya Erez wil_dbg_txrx(wil, 23734b8886eSMaya Erez "ctx(%d) was already completed\n", 23834b8886eSMaya Erez vring->swtail); 23910590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 24034b8886eSMaya Erez continue; 24134b8886eSMaya Erez } 24268ada71eSVladimir Kondratiev *d = *_d; 2432232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 244f88f113aSVladimir Kondratiev if (ctx->skb) 245f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 24610590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2472be7d22fSVladimir Kondratiev } else { /* rx */ 24868ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 24968ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 25010590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 25168ada71eSVladimir Kondratiev 252f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 25368ada71eSVladimir Kondratiev *d = *_d; 25468ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2557e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2567e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 257f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 25810590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2592be7d22fSVladimir Kondratiev } 2602be7d22fSVladimir Kondratiev } 2612be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2622be7d22fSVladimir Kondratiev kfree(vring->ctx); 2632be7d22fSVladimir Kondratiev vring->pa = 0; 2642be7d22fSVladimir Kondratiev vring->va = NULL; 2652be7d22fSVladimir Kondratiev vring->ctx = NULL; 2662be7d22fSVladimir Kondratiev } 2672be7d22fSVladimir Kondratiev 2682be7d22fSVladimir Kondratiev /** 2692be7d22fSVladimir Kondratiev * Allocate one skb for Rx VRING 2702be7d22fSVladimir Kondratiev * 2712be7d22fSVladimir Kondratiev * Safe to call from IRQ 2722be7d22fSVladimir Kondratiev */ 27310590c6aSGidon Studinski static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct wil_ring *vring, 2742be7d22fSVladimir Kondratiev u32 i, int headroom) 2752be7d22fSVladimir Kondratiev { 2762be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 27752a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 27868ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 27910590c6aSGidon Studinski volatile struct vring_rx_desc *_d = &vring->va[i].rx.legacy; 2802be7d22fSVladimir Kondratiev dma_addr_t pa; 2812be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2828fe59627SVladimir Kondratiev 2832be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2842be7d22fSVladimir Kondratiev return -ENOMEM; 2852be7d22fSVladimir Kondratiev 2862be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2872be7d22fSVladimir Kondratiev skb_put(skb, sz); 2882be7d22fSVladimir Kondratiev 2892be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2902be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2912be7d22fSVladimir Kondratiev kfree_skb(skb); 2922be7d22fSVladimir Kondratiev return -ENOMEM; 2932be7d22fSVladimir Kondratiev } 2942be7d22fSVladimir Kondratiev 29548c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 29668ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2972be7d22fSVladimir Kondratiev /* ip_length don't care */ 2982be7d22fSVladimir Kondratiev /* b11 don't care */ 2992be7d22fSVladimir Kondratiev /* error don't care */ 3002be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 3017e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 30268ada71eSVladimir Kondratiev *_d = *d; 303f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 3042be7d22fSVladimir Kondratiev 3052be7d22fSVladimir Kondratiev return 0; 3062be7d22fSVladimir Kondratiev } 3072be7d22fSVladimir Kondratiev 3082be7d22fSVladimir Kondratiev /** 3092be7d22fSVladimir Kondratiev * Adds radiotap header 3102be7d22fSVladimir Kondratiev * 3112be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3122be7d22fSVladimir Kondratiev * 3132be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3142be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3152be7d22fSVladimir Kondratiev * - Phy info 3162be7d22fSVladimir Kondratiev */ 3172be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 31833e61169SVladimir Kondratiev struct sk_buff *skb) 3192be7d22fSVladimir Kondratiev { 3202be7d22fSVladimir Kondratiev struct wil6210_rtap { 3212be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3222be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3232be7d22fSVladimir Kondratiev /* flags */ 3242be7d22fSVladimir Kondratiev u8 flags; 3252be7d22fSVladimir Kondratiev /* channel */ 3262be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3272be7d22fSVladimir Kondratiev __le16 chnl_flags; 3282be7d22fSVladimir Kondratiev /* MCS */ 3292be7d22fSVladimir Kondratiev u8 mcs_present; 3302be7d22fSVladimir Kondratiev u8 mcs_flags; 3312be7d22fSVladimir Kondratiev u8 mcs_index; 3322be7d22fSVladimir Kondratiev } __packed; 3332be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor { 3342be7d22fSVladimir Kondratiev struct wil6210_rtap rtap; 3352be7d22fSVladimir Kondratiev /* vendor */ 3362be7d22fSVladimir Kondratiev u8 vendor_oui[3] __aligned(2); 3372be7d22fSVladimir Kondratiev u8 vendor_ns; 3382be7d22fSVladimir Kondratiev __le16 vendor_skip; 3392be7d22fSVladimir Kondratiev u8 vendor_data[0]; 3402be7d22fSVladimir Kondratiev } __packed; 34133e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 3422be7d22fSVladimir Kondratiev struct wil6210_rtap_vendor *rtap_vendor; 3432be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3442be7d22fSVladimir Kondratiev int phy_length = 0; /* phy info header size, bytes */ 3452be7d22fSVladimir Kondratiev static char phy_data[128]; 3467d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3472be7d22fSVladimir Kondratiev 3482be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 3492be7d22fSVladimir Kondratiev rtap_len = sizeof(*rtap_vendor) + sizeof(*d); 3502be7d22fSVladimir Kondratiev /* calculate additional length */ 3512be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_PHY_INFO) { 3522be7d22fSVladimir Kondratiev /** 3532be7d22fSVladimir Kondratiev * PHY info starts from 8-byte boundary 3542be7d22fSVladimir Kondratiev * there are 8-byte lines, last line may be partially 3552be7d22fSVladimir Kondratiev * written (HW bug), thus FW configures for last line 3562be7d22fSVladimir Kondratiev * to be excessive. Driver skips this last line. 3572be7d22fSVladimir Kondratiev */ 3582be7d22fSVladimir Kondratiev int len = min_t(int, 8 + sizeof(phy_data), 3592be7d22fSVladimir Kondratiev wil_rxdesc_phy_length(d)); 3608fe59627SVladimir Kondratiev 3612be7d22fSVladimir Kondratiev if (len > 8) { 3622be7d22fSVladimir Kondratiev void *p = skb_tail_pointer(skb); 3632be7d22fSVladimir Kondratiev void *pa = PTR_ALIGN(p, 8); 3648fe59627SVladimir Kondratiev 3652be7d22fSVladimir Kondratiev if (skb_tailroom(skb) >= len + (pa - p)) { 3662be7d22fSVladimir Kondratiev phy_length = len - 8; 3672be7d22fSVladimir Kondratiev memcpy(phy_data, pa, phy_length); 3682be7d22fSVladimir Kondratiev } 3692be7d22fSVladimir Kondratiev } 3702be7d22fSVladimir Kondratiev } 3712be7d22fSVladimir Kondratiev rtap_len += phy_length; 3722be7d22fSVladimir Kondratiev } 3732be7d22fSVladimir Kondratiev 3742be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3752be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3769165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3772be7d22fSVladimir Kondratiev return; 3782be7d22fSVladimir Kondratiev } 3792be7d22fSVladimir Kondratiev 380d58ff351SJohannes Berg rtap_vendor = skb_push(skb, rtap_len); 3812be7d22fSVladimir Kondratiev memset(rtap_vendor, 0, rtap_len); 3822be7d22fSVladimir Kondratiev 3832be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 3842be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_len = cpu_to_le16(rtap_len); 3852be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present = cpu_to_le32( 3862be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_FLAGS) | 3872be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3882be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3892be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 3902be7d22fSVladimir Kondratiev rtap_vendor->rtap.flags |= IEEE80211_RADIOTAP_F_BADFCS; 3912be7d22fSVladimir Kondratiev 3922be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 3932be7d22fSVladimir Kondratiev rtap_vendor->rtap.chnl_flags = cpu_to_le16(0); 3942be7d22fSVladimir Kondratiev 3952be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 3962be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_flags = 0; 3972be7d22fSVladimir Kondratiev rtap_vendor->rtap.mcs_index = wil_rxdesc_mcs(d); 3982be7d22fSVladimir Kondratiev 3992be7d22fSVladimir Kondratiev if (rtap_include_phy_info) { 4002be7d22fSVladimir Kondratiev rtap_vendor->rtap.rthdr.it_present |= cpu_to_le32(1 << 4012be7d22fSVladimir Kondratiev IEEE80211_RADIOTAP_VENDOR_NAMESPACE); 4022be7d22fSVladimir Kondratiev /* OUI for Wilocity 04:ce:14 */ 4032be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[0] = 0x04; 4042be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[1] = 0xce; 4052be7d22fSVladimir Kondratiev rtap_vendor->vendor_oui[2] = 0x14; 4062be7d22fSVladimir Kondratiev rtap_vendor->vendor_ns = 1; 4072be7d22fSVladimir Kondratiev /* Rx descriptor + PHY data */ 4082be7d22fSVladimir Kondratiev rtap_vendor->vendor_skip = cpu_to_le16(sizeof(*d) + 4092be7d22fSVladimir Kondratiev phy_length); 4102be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data, (void *)d, sizeof(*d)); 4112be7d22fSVladimir Kondratiev memcpy(rtap_vendor->vendor_data + sizeof(*d), phy_data, 4122be7d22fSVladimir Kondratiev phy_length); 4132be7d22fSVladimir Kondratiev } 4142be7d22fSVladimir Kondratiev } 4152be7d22fSVladimir Kondratiev 416a8313341SVladimir Kondratiev /* similar to ieee80211_ version, but FC contain only 1-st byte */ 417a8313341SVladimir Kondratiev static inline int wil_is_back_req(u8 fc) 418a8313341SVladimir Kondratiev { 419a8313341SVladimir Kondratiev return (fc & (IEEE80211_FCTL_FTYPE | IEEE80211_FCTL_STYPE)) == 420a8313341SVladimir Kondratiev (IEEE80211_FTYPE_CTL | IEEE80211_STYPE_BACK_REQ); 421a8313341SVladimir Kondratiev } 422a8313341SVladimir Kondratiev 423fe9ee51eSMaya Erez bool wil_is_rx_idle(struct wil6210_priv *wil) 424fe9ee51eSMaya Erez { 425fe9ee51eSMaya Erez struct vring_rx_desc *_d; 42610590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 427fe9ee51eSMaya Erez 42810590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 429fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 430fe9ee51eSMaya Erez return false; 431fe9ee51eSMaya Erez 432fe9ee51eSMaya Erez return true; 433fe9ee51eSMaya Erez } 434fe9ee51eSMaya Erez 4352be7d22fSVladimir Kondratiev /** 4362be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4372be7d22fSVladimir Kondratiev * 43833e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 43933e61169SVladimir Kondratiev * 4402be7d22fSVladimir Kondratiev * Safe to call from IRQ 4412be7d22fSVladimir Kondratiev */ 4422be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 44310590c6aSGidon Studinski struct wil_ring *vring) 4442be7d22fSVladimir Kondratiev { 4452be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4465bd60982SLior David struct wil6210_vif *vif; 4475bd60982SLior David struct net_device *ndev; 44868ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 44968ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4502be7d22fSVladimir Kondratiev struct sk_buff *skb; 4512be7d22fSVladimir Kondratiev dma_addr_t pa; 452c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 45352a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4547e594444SVladimir Kondratiev u16 dmalen; 4552be7d22fSVladimir Kondratiev u8 ftype; 4565bd60982SLior David int cid, mid; 4573b282bc6SVladimir Kondratiev int i; 458c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 459c8b78b5fSVladimir Kondratiev 46033e61169SVladimir Kondratiev BUILD_BUG_ON(sizeof(struct vring_rx_desc) > sizeof(skb->cb)); 46133e61169SVladimir Kondratiev 4623b282bc6SVladimir Kondratiev again: 46310590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4642be7d22fSVladimir Kondratiev return NULL; 4652be7d22fSVladimir Kondratiev 4663b282bc6SVladimir Kondratiev i = (int)vring->swhead; 46710590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 46833c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4692be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4702be7d22fSVladimir Kondratiev return NULL; 4712be7d22fSVladimir Kondratiev } 4722be7d22fSVladimir Kondratiev 473148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 474148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 47510590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 476148416a9SVladimir Kondratiev if (!skb) { 477148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4783b282bc6SVladimir Kondratiev goto again; 479148416a9SVladimir Kondratiev } 48068ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 48168ada71eSVladimir Kondratiev *d = *_d; 48268ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 48368ada71eSVladimir Kondratiev 48468ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 48568ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 48668ada71eSVladimir Kondratiev 487148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 488148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 489a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 49068ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 49168ada71eSVladimir Kondratiev 4923b282bc6SVladimir Kondratiev cid = wil_rxdesc_cid(d); 4935bd60982SLior David mid = wil_rxdesc_mid(d); 4945bd60982SLior David vif = wil->vifs[mid]; 4955bd60982SLior David 4965bd60982SLior David if (unlikely(!vif)) { 4975bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4985bd60982SLior David mid); 4995bd60982SLior David kfree_skb(skb); 5005bd60982SLior David goto again; 5015bd60982SLior David } 5025bd60982SLior David ndev = vif_to_ndev(vif); 5033b282bc6SVladimir Kondratiev stats = &wil->sta[cid].stats; 5043b282bc6SVladimir Kondratiev 50533c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 506e270045bSVladimir Kondratiev wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); 5073b282bc6SVladimir Kondratiev stats->rx_large_frame++; 508110dea00SWei Yongjun kfree_skb(skb); 5093b282bc6SVladimir Kondratiev goto again; 510e270045bSVladimir Kondratiev } 5117e594444SVladimir Kondratiev skb_trim(skb, dmalen); 51233e61169SVladimir Kondratiev 5131cbbcb08SVladimir Kondratiev prefetch(skb->data); 5141cbbcb08SVladimir Kondratiev 515c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 516c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 517c0d37713SVladimir Kondratiev 518c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 519c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 520c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5212be7d22fSVladimir Kondratiev 5222be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5232be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 52433e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5252be7d22fSVladimir Kondratiev 5262be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5272be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5282be7d22fSVladimir Kondratiev return skb; 529a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5302be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5312be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5322be7d22fSVladimir Kondratiev */ 53368ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 53433c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 535a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 536a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 537a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 538a8313341SVladimir Kondratiev 539a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 540a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 541a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5423b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 543a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 544a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 545a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 546a8313341SVladimir Kondratiev mid, cid, tid, seq); 5475bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 548a8313341SVladimir Kondratiev } else { 549a8313341SVladimir Kondratiev /* print again all info. One can enable only this 550a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 551a8313341SVladimir Kondratiev */ 552a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 553a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 554a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 555a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 556a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 557a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 558a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 559a8313341SVladimir Kondratiev } 5602be7d22fSVladimir Kondratiev kfree_skb(skb); 5613b282bc6SVladimir Kondratiev goto again; 5622be7d22fSVladimir Kondratiev } 5632be7d22fSVladimir Kondratiev 564c406ea7cSVladimir Kondratiev if (unlikely(skb->len < ETH_HLEN + snaplen)) { 5652be7d22fSVladimir Kondratiev wil_err(wil, "Short frame, len = %d\n", skb->len); 5663b282bc6SVladimir Kondratiev stats->rx_short_frame++; 5672be7d22fSVladimir Kondratiev kfree_skb(skb); 5683b282bc6SVladimir Kondratiev goto again; 5692be7d22fSVladimir Kondratiev } 5702be7d22fSVladimir Kondratiev 571504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 572504937d4SKirshenbaum Erez * and in case of error drop the packet 573504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 574504937d4SKirshenbaum Erez */ 57533c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 576504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 57733c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 578504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5794a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5804a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5814a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5824a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5834a68ab10SVladimir Kondratiev */ 584504937d4SKirshenbaum Erez } 585504937d4SKirshenbaum Erez 586c406ea7cSVladimir Kondratiev if (snaplen) { 587c406ea7cSVladimir Kondratiev /* Packet layout 588c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 589c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 590c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 591c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 592c406ea7cSVladimir Kondratiev */ 593c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 594c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 595c406ea7cSVladimir Kondratiev } 596c406ea7cSVladimir Kondratiev 5972be7d22fSVladimir Kondratiev return skb; 5982be7d22fSVladimir Kondratiev } 5992be7d22fSVladimir Kondratiev 6002be7d22fSVladimir Kondratiev /** 6012be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 6022be7d22fSVladimir Kondratiev * buffers posted at @swtail 6035bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6045bd60982SLior David * allocate skbs with headroom according to main interface only. This 6055bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6065bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6075bd60982SLior David * and we will need to fix this code once we add support. 6082be7d22fSVladimir Kondratiev */ 6092be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6102be7d22fSVladimir Kondratiev { 611e00243faSLior David struct net_device *ndev = wil->main_ndev; 61210590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6132be7d22fSVladimir Kondratiev u32 next_tail; 6142be7d22fSVladimir Kondratiev int rc = 0; 6152be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6162be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6172be7d22fSVladimir Kondratiev 61810590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6192be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6202be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6212be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 62233c477fdSVladimir Kondratiev if (unlikely(rc)) { 6233d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6242be7d22fSVladimir Kondratiev rc, v->swtail); 6252be7d22fSVladimir Kondratiev break; 6262be7d22fSVladimir Kondratiev } 6272be7d22fSVladimir Kondratiev } 628ab6d7cc3SMaya Erez 629ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 630ab6d7cc3SMaya Erez * committing them to HW 631ab6d7cc3SMaya Erez */ 632ab6d7cc3SMaya Erez wmb(); 633ab6d7cc3SMaya Erez 634b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6352be7d22fSVladimir Kondratiev 6362be7d22fSVladimir Kondratiev return rc; 6372be7d22fSVladimir Kondratiev } 6382be7d22fSVladimir Kondratiev 63958527421SVladimir Kondratiev /** 64058527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 64158527421SVladimir Kondratiev * @cs: One area of memory 64258527421SVladimir Kondratiev * @ct: Another area of memory 64358527421SVladimir Kondratiev * @count: The size of the area. 64458527421SVladimir Kondratiev * 64558527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 64658527421SVladimir Kondratiev * with minimal modifications 64758527421SVladimir Kondratiev */ 64858527421SVladimir Kondratiev static int reverse_memcmp(const void *cs, const void *ct, size_t count) 64958527421SVladimir Kondratiev { 65058527421SVladimir Kondratiev const unsigned char *su1, *su2; 65158527421SVladimir Kondratiev int res = 0; 65258527421SVladimir Kondratiev 65358527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 65458527421SVladimir Kondratiev --su1, --su2, count--) { 65558527421SVladimir Kondratiev res = *su1 - *su2; 65658527421SVladimir Kondratiev if (res) 65758527421SVladimir Kondratiev break; 65858527421SVladimir Kondratiev } 65958527421SVladimir Kondratiev return res; 66058527421SVladimir Kondratiev } 66158527421SVladimir Kondratiev 66258527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 66358527421SVladimir Kondratiev { 66458527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 66558527421SVladimir Kondratiev int cid = wil_rxdesc_cid(d); 66658527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 66758527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 66858527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 66958527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 67058527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 67158527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 67258527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 67358527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 67458527421SVladimir Kondratiev 67558527421SVladimir Kondratiev if (!cc->key_set) { 67658527421SVladimir Kondratiev wil_err_ratelimited(wil, 67758527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 67858527421SVladimir Kondratiev cid, tid, mc, key_id); 67958527421SVladimir Kondratiev return -EINVAL; 68058527421SVladimir Kondratiev } 68158527421SVladimir Kondratiev 68258527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 68358527421SVladimir Kondratiev wil_err_ratelimited(wil, 68458527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 68558527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 68658527421SVladimir Kondratiev return -EINVAL; 68758527421SVladimir Kondratiev } 68858527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 68958527421SVladimir Kondratiev 69058527421SVladimir Kondratiev return 0; 69158527421SVladimir Kondratiev } 69258527421SVladimir Kondratiev 6932be7d22fSVladimir Kondratiev /* 6942be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 695e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 6962be7d22fSVladimir Kondratiev */ 697b4490f42SVladimir Kondratiev void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 6982be7d22fSVladimir Kondratiev { 699c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 700e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 701c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 702e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 7032be7d22fSVladimir Kondratiev unsigned int len = skb->len; 704c8b78b5fSVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 70541d6b093SVladimir Kondratiev int cid = wil_rxdesc_cid(d); /* always 0..7, no need to check */ 70658527421SVladimir Kondratiev int security = wil_rxdesc_security(d); 707c42da999SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 708c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 709c42da999SVladimir Kondratiev * is not suitable, need to look at data 710c42da999SVladimir Kondratiev */ 711c42da999SVladimir Kondratiev int mcast = is_multicast_ether_addr(eth->h_dest); 712c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats = &wil->sta[cid].stats; 713c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 714c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 715c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 716c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 717c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 718c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 719c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 720c42da999SVladimir Kondratiev }; 7212be7d22fSVladimir Kondratiev 7220553640dSVladimir Shulman if (ndev->features & NETIF_F_RXHASH) 7230553640dSVladimir Shulman /* fake L4 to ensure it won't be re-calculated later 7240553640dSVladimir Shulman * set hash to any non-zero value to activate rps 7250553640dSVladimir Shulman * mechanism, core will be chosen according 7260553640dSVladimir Shulman * to user-level rps configuration. 7270553640dSVladimir Shulman */ 7280553640dSVladimir Shulman skb_set_hash(skb, 1, PKT_HASH_TYPE_L4); 7290553640dSVladimir Shulman 730241804cbSVladimir Kondratiev skb_orphan(skb); 731241804cbSVladimir Kondratiev 73258527421SVladimir Kondratiev if (security && (wil_rx_crypto_check(wil, skb) != 0)) { 73358527421SVladimir Kondratiev rc = GRO_DROP; 73458527421SVladimir Kondratiev dev_kfree_skb(skb); 73558527421SVladimir Kondratiev stats->rx_replay++; 73658527421SVladimir Kondratiev goto stats; 73758527421SVladimir Kondratiev } 73858527421SVladimir Kondratiev 739e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 740c42da999SVladimir Kondratiev if (mcast) { 741c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 742c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 743c42da999SVladimir Kondratiev */ 744c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 745c42da999SVladimir Kondratiev } else { 746e00243faSLior David int xmit_cid = wil_find_cid(wil, vif->mid, 747e00243faSLior David eth->h_dest); 7482be7d22fSVladimir Kondratiev 749c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 750c42da999SVladimir Kondratiev /* The destination station is associated to 751c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 752c42da999SVladimir Kondratiev * directly to it and do not pass it to local 753c42da999SVladimir Kondratiev * net stack. 754c42da999SVladimir Kondratiev */ 755c42da999SVladimir Kondratiev xmit_skb = skb; 756c42da999SVladimir Kondratiev skb = NULL; 757c42da999SVladimir Kondratiev } 758c42da999SVladimir Kondratiev } 759c42da999SVladimir Kondratiev } 760c42da999SVladimir Kondratiev if (xmit_skb) { 761c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 762c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 763c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 764c42da999SVladimir Kondratiev */ 765c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 766c42da999SVladimir Kondratiev xmit_skb->priority += 256; 767c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 768c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 769c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 770c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 771c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 772c42da999SVladimir Kondratiev } 773c42da999SVladimir Kondratiev 774c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 775c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 7765bd60982SLior David skb->dev = ndev; 777c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 778c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 779c42da999SVladimir Kondratiev len, gro_res_str[rc]); 780c42da999SVladimir Kondratiev } 78158527421SVladimir Kondratiev stats: 782c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 783b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 784b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 785b5998e6aSVladimir Kondratiev stats->rx_dropped++; 786b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 787b5998e6aSVladimir Kondratiev } else { 7882be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 789c8b78b5fSVladimir Kondratiev stats->rx_packets++; 7902be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 791c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 792c42da999SVladimir Kondratiev if (mcast) 793c42da999SVladimir Kondratiev ndev->stats.multicast++; 794194b482bSVladimir Kondratiev } 7952be7d22fSVladimir Kondratiev } 7962be7d22fSVladimir Kondratiev 7972be7d22fSVladimir Kondratiev /** 7982be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 7992be7d22fSVladimir Kondratiev * 800e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 8012be7d22fSVladimir Kondratiev */ 802e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 8032be7d22fSVladimir Kondratiev { 804e00243faSLior David struct net_device *ndev = wil->main_ndev; 805e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 80610590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 8072be7d22fSVladimir Kondratiev struct sk_buff *skb; 8082be7d22fSVladimir Kondratiev 80933c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 8102be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 8112be7d22fSVladimir Kondratiev return; 8122be7d22fSVladimir Kondratiev } 813af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 814e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 815e0287c4aSVladimir Kondratiev (*quota)--; 8162be7d22fSVladimir Kondratiev 817e00243faSLior David /* monitor is currently supported on main interface only */ 818e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 8192be7d22fSVladimir Kondratiev skb->dev = ndev; 8202be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 8212be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 8222be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 8232be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 824b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 8252be7d22fSVladimir Kondratiev } else { 826b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 8272be7d22fSVladimir Kondratiev } 8282be7d22fSVladimir Kondratiev } 8292be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 8302be7d22fSVladimir Kondratiev } 8312be7d22fSVladimir Kondratiev 83252a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 83352a45702SLior David { 83452a45702SLior David wil->rx_buf_len = rx_large_buf ? 83552a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 83652a45702SLior David if (mtu_max > wil->rx_buf_len) { 83752a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 83852a45702SLior David * backward compatibility (mtu_max parameter was also used 83952a45702SLior David * to support receiving large packets) 84052a45702SLior David */ 84152a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 84252a45702SLior David wil->rx_buf_len = mtu_max; 84352a45702SLior David } 84452a45702SLior David } 84552a45702SLior David 846d3762b40SVladimir Kondratiev int wil_rx_init(struct wil6210_priv *wil, u16 size) 8472be7d22fSVladimir Kondratiev { 84810590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8492be7d22fSVladimir Kondratiev int rc; 8502be7d22fSVladimir Kondratiev 851af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 8529cf10d62SVladimir Kondratiev 8538bf6adb9SVladimir Kondratiev if (vring->va) { 8548bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 8558bf6adb9SVladimir Kondratiev return -EINVAL; 8568bf6adb9SVladimir Kondratiev } 8578bf6adb9SVladimir Kondratiev 85852a45702SLior David wil_rx_buf_len_init(wil); 85952a45702SLior David 860d3762b40SVladimir Kondratiev vring->size = size; 8612be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 8622be7d22fSVladimir Kondratiev if (rc) 8632be7d22fSVladimir Kondratiev return rc; 8642be7d22fSVladimir Kondratiev 86547e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 8662be7d22fSVladimir Kondratiev if (rc) 8672be7d22fSVladimir Kondratiev goto err_free; 8682be7d22fSVladimir Kondratiev 8692be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 8702be7d22fSVladimir Kondratiev if (rc) 8712be7d22fSVladimir Kondratiev goto err_free; 8722be7d22fSVladimir Kondratiev 8732be7d22fSVladimir Kondratiev return 0; 8742be7d22fSVladimir Kondratiev err_free: 8752be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8762be7d22fSVladimir Kondratiev 8772be7d22fSVladimir Kondratiev return rc; 8782be7d22fSVladimir Kondratiev } 8792be7d22fSVladimir Kondratiev 8802be7d22fSVladimir Kondratiev void wil_rx_fini(struct wil6210_priv *wil) 8812be7d22fSVladimir Kondratiev { 88210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 8832be7d22fSVladimir Kondratiev 884af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 8859cf10d62SVladimir Kondratiev 8862acb4220SVladimir Kondratiev if (vring->va) 8872be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 0); 8882be7d22fSVladimir Kondratiev } 8892be7d22fSVladimir Kondratiev 89010590c6aSGidon Studinski static inline void wil_tx_data_init(struct wil_ring_tx_data *txdata) 891875e9439SMaya Erez { 892875e9439SMaya Erez spin_lock_bh(&txdata->lock); 893875e9439SMaya Erez txdata->dot1x_open = 0; 894875e9439SMaya Erez txdata->enabled = 0; 895875e9439SMaya Erez txdata->idle = 0; 896875e9439SMaya Erez txdata->last_idle = 0; 897875e9439SMaya Erez txdata->begin = 0; 898875e9439SMaya Erez txdata->agg_wsize = 0; 899875e9439SMaya Erez txdata->agg_timeout = 0; 900875e9439SMaya Erez txdata->agg_amsdu = 0; 901875e9439SMaya Erez txdata->addba_in_progress = false; 902e00243faSLior David txdata->mid = U8_MAX; 903875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 904875e9439SMaya Erez } 905875e9439SMaya Erez 906e00243faSLior David int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 9072be7d22fSVladimir Kondratiev int cid, int tid) 9082be7d22fSVladimir Kondratiev { 909e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 9102be7d22fSVladimir Kondratiev int rc; 9112be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 9122be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 9132be7d22fSVladimir Kondratiev .vring_cfg = { 9142be7d22fSVladimir Kondratiev .tx_sw_ring = { 9159a06bec9SVladimir Kondratiev .max_mpdu_size = 916c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 917b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 9182be7d22fSVladimir Kondratiev }, 9192be7d22fSVladimir Kondratiev .ringid = id, 920a70abea5SVladimir Kondratiev .cidxtid = mk_cidxtid(cid, tid), 9212be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 9222be7d22fSVladimir Kondratiev .mac_ctrl = 0, 9232be7d22fSVladimir Kondratiev .to_resolution = 0, 9243277213fSVladimir Kondratiev .agg_max_wsize = 0, 9252be7d22fSVladimir Kondratiev .schd_params = { 9262be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 9272be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 9282be7d22fSVladimir Kondratiev }, 9292be7d22fSVladimir Kondratiev }, 9302be7d22fSVladimir Kondratiev }; 9312be7d22fSVladimir Kondratiev struct { 932b874ddecSLior David struct wmi_cmd_hdr wmi; 9332be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 934807b0860SAlexei Avshalom Lazar } __packed reply = { 935807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 936807b0860SAlexei Avshalom Lazar }; 93710590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 93810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 9392be7d22fSVladimir Kondratiev 940af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 941e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 9429b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 9439cf10d62SVladimir Kondratiev 9442be7d22fSVladimir Kondratiev if (vring->va) { 9452be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 9462be7d22fSVladimir Kondratiev rc = -EINVAL; 9472be7d22fSVladimir Kondratiev goto out; 9482be7d22fSVladimir Kondratiev } 9492be7d22fSVladimir Kondratiev 950875e9439SMaya Erez wil_tx_data_init(txdata); 9512be7d22fSVladimir Kondratiev vring->size = size; 9522be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 9532be7d22fSVladimir Kondratiev if (rc) 9542be7d22fSVladimir Kondratiev goto out; 9552be7d22fSVladimir Kondratiev 95610590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 95710590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 95893ae6d49SVladimir Kondratiev 9592be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 9602be7d22fSVladimir Kondratiev 961e00243faSLior David if (!vif->privacy) 962230d8442SVladimir Kondratiev txdata->dot1x_open = true; 963e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 9642be7d22fSVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 9652be7d22fSVladimir Kondratiev if (rc) 9662be7d22fSVladimir Kondratiev goto out_free; 9672be7d22fSVladimir Kondratiev 968b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 9692be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 9702be7d22fSVladimir Kondratiev reply.cmd.status); 971c331997bSVladimir Kondratiev rc = -EINVAL; 9722be7d22fSVladimir Kondratiev goto out_free; 9732be7d22fSVladimir Kondratiev } 9742be7d22fSVladimir Kondratiev 975dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 976dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 977e00243faSLior David txdata->mid = vif->mid; 978097638a0SVladimir Kondratiev txdata->enabled = 1; 979dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 980dc90506fSMaya Erez 981230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 9823a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 983097638a0SVladimir Kondratiev 9842be7d22fSVladimir Kondratiev return 0; 9852be7d22fSVladimir Kondratiev out_free: 986875e9439SMaya Erez spin_lock_bh(&txdata->lock); 987230d8442SVladimir Kondratiev txdata->dot1x_open = false; 988230d8442SVladimir Kondratiev txdata->enabled = 0; 989875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 9902be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 99110590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; 99210590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 9930916d9f2SMaya Erez 9942be7d22fSVladimir Kondratiev out: 9952be7d22fSVladimir Kondratiev 9962be7d22fSVladimir Kondratiev return rc; 9972be7d22fSVladimir Kondratiev } 9982be7d22fSVladimir Kondratiev 999e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 100041d6b093SVladimir Kondratiev { 1001e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 100241d6b093SVladimir Kondratiev int rc; 100341d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 100441d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 100541d6b093SVladimir Kondratiev .vring_cfg = { 100641d6b093SVladimir Kondratiev .tx_sw_ring = { 100741d6b093SVladimir Kondratiev .max_mpdu_size = 100841d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 100941d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 101041d6b093SVladimir Kondratiev }, 101141d6b093SVladimir Kondratiev .ringid = id, 101241d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 101341d6b093SVladimir Kondratiev }, 101441d6b093SVladimir Kondratiev }; 101541d6b093SVladimir Kondratiev struct { 1016b874ddecSLior David struct wmi_cmd_hdr wmi; 101741d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1018807b0860SAlexei Avshalom Lazar } __packed reply = { 1019807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1020807b0860SAlexei Avshalom Lazar }; 102110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 102210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 102341d6b093SVladimir Kondratiev 1024af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 102541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 10269b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 102741d6b093SVladimir Kondratiev 102841d6b093SVladimir Kondratiev if (vring->va) { 102941d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 103041d6b093SVladimir Kondratiev rc = -EINVAL; 103141d6b093SVladimir Kondratiev goto out; 103241d6b093SVladimir Kondratiev } 103341d6b093SVladimir Kondratiev 1034875e9439SMaya Erez wil_tx_data_init(txdata); 103541d6b093SVladimir Kondratiev vring->size = size; 103641d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 103741d6b093SVladimir Kondratiev if (rc) 103841d6b093SVladimir Kondratiev goto out; 103941d6b093SVladimir Kondratiev 104010590c6aSGidon Studinski wil->ring2cid_tid[id][0] = WIL6210_MAX_CID; /* CID */ 104110590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 104241d6b093SVladimir Kondratiev 104341d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 104441d6b093SVladimir Kondratiev 1045e00243faSLior David if (!vif->privacy) 1046230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1047e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1048e00243faSLior David &cmd, sizeof(cmd), 104941d6b093SVladimir Kondratiev WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 100); 105041d6b093SVladimir Kondratiev if (rc) 105141d6b093SVladimir Kondratiev goto out_free; 105241d6b093SVladimir Kondratiev 105341d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 105441d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 105541d6b093SVladimir Kondratiev reply.cmd.status); 105641d6b093SVladimir Kondratiev rc = -EINVAL; 105741d6b093SVladimir Kondratiev goto out_free; 105841d6b093SVladimir Kondratiev } 105941d6b093SVladimir Kondratiev 1060dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1061dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1062e00243faSLior David txdata->mid = vif->mid; 106341d6b093SVladimir Kondratiev txdata->enabled = 1; 1064dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 106541d6b093SVladimir Kondratiev 106641d6b093SVladimir Kondratiev return 0; 106741d6b093SVladimir Kondratiev out_free: 1068875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1069230d8442SVladimir Kondratiev txdata->enabled = 0; 1070230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1071875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 107241d6b093SVladimir Kondratiev wil_vring_free(wil, vring, 1); 107341d6b093SVladimir Kondratiev out: 107441d6b093SVladimir Kondratiev 107541d6b093SVladimir Kondratiev return rc; 107641d6b093SVladimir Kondratiev } 107741d6b093SVladimir Kondratiev 107810590c6aSGidon Studinski void wil_ring_fini_tx(struct wil6210_priv *wil, int id) 10792be7d22fSVladimir Kondratiev { 108010590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 108110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 10822be7d22fSVladimir Kondratiev 10839b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 1084097638a0SVladimir Kondratiev 10852be7d22fSVladimir Kondratiev if (!vring->va) 10862be7d22fSVladimir Kondratiev return; 10872be7d22fSVladimir Kondratiev 1088af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_fini_tx: id=%d\n", id); 10899cf10d62SVladimir Kondratiev 10905933a06dSVladimir Kondratiev spin_lock_bh(&txdata->lock); 1091230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1092e00243faSLior David txdata->mid = U8_MAX; 10935933a06dSVladimir Kondratiev txdata->enabled = 0; /* no Tx can be in progress or start anew */ 10945933a06dSVladimir Kondratiev spin_unlock_bh(&txdata->lock); 109534b8886eSMaya Erez /* napi_synchronize waits for completion of the current NAPI but will 109634b8886eSMaya Erez * not prevent the next NAPI run. 109734b8886eSMaya Erez * Add a memory barrier to guarantee that txdata->enabled is zeroed 109834b8886eSMaya Erez * before napi_synchronize so that the next scheduled NAPI will not 109934b8886eSMaya Erez * handle this vring 110034b8886eSMaya Erez */ 110134b8886eSMaya Erez wmb(); 1102097638a0SVladimir Kondratiev /* make sure NAPI won't touch this vring */ 11039419b6a2SVladimir Kondratiev if (test_bit(wil_status_napi_en, wil->status)) 1104097638a0SVladimir Kondratiev napi_synchronize(&wil->napi_tx); 1105097638a0SVladimir Kondratiev 11062be7d22fSVladimir Kondratiev wil_vring_free(wil, vring, 1); 11072be7d22fSVladimir Kondratiev } 11082be7d22fSVladimir Kondratiev 110910590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1110e00243faSLior David struct wil6210_vif *vif, 11112be7d22fSVladimir Kondratiev struct sk_buff *skb) 11122be7d22fSVladimir Kondratiev { 11133df2cd36SVladimir Kondratiev int i; 11143df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 1115e00243faSLior David int cid = wil_find_cid(wil, vif->mid, eth->h_dest); 11162be7d22fSVladimir Kondratiev 11173df2cd36SVladimir Kondratiev if (cid < 0) 11183df2cd36SVladimir Kondratiev return NULL; 11193df2cd36SVladimir Kondratiev 11203df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 112110590c6aSGidon Studinski for (i = 0; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 112210590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 112310590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1124230d8442SVladimir Kondratiev continue; 112510590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 112610590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 112710590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 11288fe59627SVladimir Kondratiev 1129af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 1130af3db60aSLazar Alexei eth->h_dest, i); 1131b729aaf0SMaya Erez if (v->va && txdata->enabled) { 11322be7d22fSVladimir Kondratiev return v; 11333df2cd36SVladimir Kondratiev } else { 1134af3db60aSLazar Alexei wil_dbg_txrx(wil, 1135af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1136af3db60aSLazar Alexei i); 11373df2cd36SVladimir Kondratiev return NULL; 11383df2cd36SVladimir Kondratiev } 11393df2cd36SVladimir Kondratiev } 11403df2cd36SVladimir Kondratiev } 11412be7d22fSVladimir Kondratiev 11422be7d22fSVladimir Kondratiev return NULL; 11432be7d22fSVladimir Kondratiev } 11442be7d22fSVladimir Kondratiev 1145e00243faSLior David static int wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 114610590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb); 114754ed90a8SVladimir Kondratiev 114810590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1149e00243faSLior David struct wil6210_vif *vif, 115054ed90a8SVladimir Kondratiev struct sk_buff *skb) 115154ed90a8SVladimir Kondratiev { 115210590c6aSGidon Studinski struct wil_ring *ring; 115354ed90a8SVladimir Kondratiev int i; 115454ed90a8SVladimir Kondratiev u8 cid; 115510590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 115654ed90a8SVladimir Kondratiev 115754ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 115854ed90a8SVladimir Kondratiev * for the AP we connected to. 1159230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 116054ed90a8SVladimir Kondratiev */ 116154ed90a8SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 116210590c6aSGidon Studinski ring = &wil->ring_tx[i]; 116310590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 116410590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 116554ed90a8SVladimir Kondratiev continue; 116654ed90a8SVladimir Kondratiev 116710590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 116841d6b093SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 116941d6b093SVladimir Kondratiev continue; 117041d6b093SVladimir Kondratiev 117110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 117210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1173230d8442SVladimir Kondratiev continue; 117454ed90a8SVladimir Kondratiev 117554ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 117654ed90a8SVladimir Kondratiev 117710590c6aSGidon Studinski return ring; 117854ed90a8SVladimir Kondratiev } 117954ed90a8SVladimir Kondratiev 118010590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 118154ed90a8SVladimir Kondratiev 118254ed90a8SVladimir Kondratiev return NULL; 118354ed90a8SVladimir Kondratiev } 118454ed90a8SVladimir Kondratiev 118570812421SVladimir Kondratiev /* Use one of 2 strategies: 118670812421SVladimir Kondratiev * 118770812421SVladimir Kondratiev * 1. New (real broadcast): 118870812421SVladimir Kondratiev * use dedicated broadcast vring 118970812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 119070812421SVladimir Kondratiev * Find 1-st vring and return it; 119170812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 119270812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 119370812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 119470812421SVladimir Kondratiev * - for PBSS 119570812421SVladimir Kondratiev */ 119610590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1197e00243faSLior David struct wil6210_vif *vif, 1198fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1199fb3cac57SVladimir Kondratiev { 120010590c6aSGidon Studinski struct wil_ring *v; 120110590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 120210590c6aSGidon Studinski int i = vif->bcast_ring; 1203fb3cac57SVladimir Kondratiev 120441d6b093SVladimir Kondratiev if (i < 0) 120541d6b093SVladimir Kondratiev return NULL; 120610590c6aSGidon Studinski v = &wil->ring_tx[i]; 120710590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1208b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1209fb3cac57SVladimir Kondratiev return NULL; 121010590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 121110590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1212230d8442SVladimir Kondratiev return NULL; 1213fb3cac57SVladimir Kondratiev 1214fb3cac57SVladimir Kondratiev return v; 1215fb3cac57SVladimir Kondratiev } 1216fb3cac57SVladimir Kondratiev 121770812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 121870812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 121970812421SVladimir Kondratiev { 122070812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 122110590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 122270812421SVladimir Kondratiev 122370812421SVladimir Kondratiev ether_addr_copy(eth->h_dest, wil->sta[cid].addr); 122470812421SVladimir Kondratiev } 122570812421SVladimir Kondratiev 122610590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1227e00243faSLior David struct wil6210_vif *vif, 122870812421SVladimir Kondratiev struct sk_buff *skb) 122970812421SVladimir Kondratiev { 123010590c6aSGidon Studinski struct wil_ring *v, *v2; 123170812421SVladimir Kondratiev struct sk_buff *skb2; 123270812421SVladimir Kondratiev int i; 123370812421SVladimir Kondratiev u8 cid; 123470812421SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 123570812421SVladimir Kondratiev char *src = eth->h_source; 123610590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 123770812421SVladimir Kondratiev 123870812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 123970812421SVladimir Kondratiev for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 124010590c6aSGidon Studinski v = &wil->ring_tx[i]; 124110590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1242e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 124370812421SVladimir Kondratiev continue; 124470812421SVladimir Kondratiev 124510590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 124670812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 124770812421SVladimir Kondratiev continue; 124810590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 124910590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 125070812421SVladimir Kondratiev continue; 125170812421SVladimir Kondratiev 125270812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 125370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 125470812421SVladimir Kondratiev continue; 125570812421SVladimir Kondratiev 125670812421SVladimir Kondratiev goto found; 125770812421SVladimir Kondratiev } 125870812421SVladimir Kondratiev 125970812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 126070812421SVladimir Kondratiev 126170812421SVladimir Kondratiev return NULL; 126270812421SVladimir Kondratiev 126370812421SVladimir Kondratiev found: 126470812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 126570812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 126670812421SVladimir Kondratiev 126770812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 126870812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 126910590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 127010590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1271e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 127270812421SVladimir Kondratiev continue; 127310590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 127470812421SVladimir Kondratiev if (cid >= WIL6210_MAX_CID) /* skip BCAST */ 127570812421SVladimir Kondratiev continue; 127610590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 127710590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 127870812421SVladimir Kondratiev continue; 127970812421SVladimir Kondratiev 128070812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 128170812421SVladimir Kondratiev continue; 128270812421SVladimir Kondratiev 128370812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 128470812421SVladimir Kondratiev if (skb2) { 128570812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 128670812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 1287e00243faSLior David wil_tx_vring(wil, vif, v2, skb2); 128870812421SVladimir Kondratiev } else { 128970812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 129070812421SVladimir Kondratiev } 129170812421SVladimir Kondratiev } 129270812421SVladimir Kondratiev 129370812421SVladimir Kondratiev return v; 129470812421SVladimir Kondratiev } 129570812421SVladimir Kondratiev 129699b55bd2SKirshenbaum Erez static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len, 129799b55bd2SKirshenbaum Erez int vring_index) 12982be7d22fSVladimir Kondratiev { 129968ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 13002be7d22fSVladimir Kondratiev d->dma.ip_length = 0; 13012be7d22fSVladimir Kondratiev /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 13022be7d22fSVladimir Kondratiev d->dma.b11 = 0/*14 | BIT(7)*/; 13032be7d22fSVladimir Kondratiev d->dma.error = 0; 13042be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 13057e594444SVladimir Kondratiev d->dma.length = cpu_to_le16((u16)len); 130699b55bd2SKirshenbaum Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 13072be7d22fSVladimir Kondratiev d->mac.d[0] = 0; 13082be7d22fSVladimir Kondratiev d->mac.d[1] = 0; 13092be7d22fSVladimir Kondratiev d->mac.d[2] = 0; 13102be7d22fSVladimir Kondratiev d->mac.ucode_cmd = 0; 13112be7d22fSVladimir Kondratiev /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 13122be7d22fSVladimir Kondratiev d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 13132be7d22fSVladimir Kondratiev (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 13142be7d22fSVladimir Kondratiev 13152be7d22fSVladimir Kondratiev return 0; 13162be7d22fSVladimir Kondratiev } 13172be7d22fSVladimir Kondratiev 1318c236658fSVladimir Kondratiev static inline 1319c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1320c236658fSVladimir Kondratiev { 13213d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1322c236658fSVladimir Kondratiev } 1323c236658fSVladimir Kondratiev 13243d4bde15SVladimir Kondratiev /** 13253d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 13263d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13273d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 13283d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 13293d4bde15SVladimir Kondratiev */ 13303d4bde15SVladimir Kondratiev 13313d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 13323d4bde15SVladimir Kondratiev struct sk_buff *skb, 13333d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 13343d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1335504937d4SKirshenbaum Erez { 13363d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 13373d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 13383d4bde15SVladimir Kondratiev 13393d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 13403d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 13413d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 13423d4bde15SVladimir Kondratiev 13433d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 13443d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 13453d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 13463d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 13473d4bde15SVladimir Kondratiev 13483d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 13493d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 13503d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 13513d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 13523d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 13533d4bde15SVladimir Kondratiev } 13543d4bde15SVladimir Kondratiev 13553d4bde15SVladimir Kondratiev /** 13563d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 13573d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 13583d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 13593d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 13603d4bde15SVladimir Kondratiev * 13613d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 13623d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 13633d4bde15SVladimir Kondratiev */ 13643d4bde15SVladimir Kondratiev 13653d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 13663d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1367504937d4SKirshenbaum Erez int protocol; 1368504937d4SKirshenbaum Erez 1369504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1370504937d4SKirshenbaum Erez return 0; 1371504937d4SKirshenbaum Erez 1372df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1373df2d08eeSVladimir Kondratiev 1374504937d4SKirshenbaum Erez switch (skb->protocol) { 1375504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1376504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1377df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1378504937d4SKirshenbaum Erez break; 1379504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1380504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1381504937d4SKirshenbaum Erez break; 1382504937d4SKirshenbaum Erez default: 1383504937d4SKirshenbaum Erez return -EINVAL; 1384504937d4SKirshenbaum Erez } 1385504937d4SKirshenbaum Erez 1386504937d4SKirshenbaum Erez switch (protocol) { 1387504937d4SKirshenbaum Erez case IPPROTO_TCP: 1388504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1389504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1390504937d4SKirshenbaum Erez d->dma.d0 |= 1391504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1392504937d4SKirshenbaum Erez break; 1393504937d4SKirshenbaum Erez case IPPROTO_UDP: 1394504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1395504937d4SKirshenbaum Erez d->dma.d0 |= 1396504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1397504937d4SKirshenbaum Erez break; 1398504937d4SKirshenbaum Erez default: 1399504937d4SKirshenbaum Erez return -EINVAL; 1400504937d4SKirshenbaum Erez } 1401504937d4SKirshenbaum Erez 1402504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1403504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1404504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1405504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1406504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1407504937d4SKirshenbaum Erez 1408504937d4SKirshenbaum Erez return 0; 1409504937d4SKirshenbaum Erez } 1410504937d4SKirshenbaum Erez 14113d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 14123d4bde15SVladimir Kondratiev { 14133d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 14143d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 14153d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 14163d4bde15SVladimir Kondratiev } 14173d4bde15SVladimir Kondratiev 14183d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 14193d4bde15SVladimir Kondratiev { 14203d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 14213d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 14223d4bde15SVladimir Kondratiev } 14233d4bde15SVladimir Kondratiev 1424e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 142510590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 14263d4bde15SVladimir Kondratiev { 14273d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 14283d4bde15SVladimir Kondratiev 14293d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 14303d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 14313d4bde15SVladimir Kondratiev *_first_desc = NULL; 14323d4bde15SVladimir Kondratiev 14333d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 14343d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 14353d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 14363d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 14373d4bde15SVladimir Kondratiev 14383d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 14393d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 14403d4bde15SVladimir Kondratiev 14413d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 14423d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 14433d4bde15SVladimir Kondratiev 14443d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 144510590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 14463d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 14473d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 14483d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 14493d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 145010590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 145110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 14523d4bde15SVladimir Kondratiev uint i = swhead; 14533d4bde15SVladimir Kondratiev dma_addr_t pa; 14543d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 14553d4bde15SVladimir Kondratiev int rem_data = mss; 14563d4bde15SVladimir Kondratiev int lenmss; 14573d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 14583d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 14593d4bde15SVladimir Kondratiev bool is_ipv4; 14603d4bde15SVladimir Kondratiev int tcp_hdr_len; 14613d4bde15SVladimir Kondratiev int skb_net_hdr_len; 14623d4bde15SVladimir Kondratiev int gso_type; 1463e3d2ed94SHamad Kadmany int rc = -EINVAL; 14643d4bde15SVladimir Kondratiev 1465af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1466af3db60aSLazar Alexei vring_index); 14673d4bde15SVladimir Kondratiev 14683d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 14693d4bde15SVladimir Kondratiev return -EINVAL; 14703d4bde15SVladimir Kondratiev 14713d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 14723d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 14733d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 14743d4bde15SVladimir Kondratiev * this is the initial check only. 14753d4bde15SVladimir Kondratiev */ 14763d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 14773d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 14783d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 14793d4bde15SVladimir Kondratiev vring_index, min_desc_required); 14803d4bde15SVladimir Kondratiev return -ENOMEM; 14813d4bde15SVladimir Kondratiev } 14823d4bde15SVladimir Kondratiev 14833d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 14843d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 14853d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 14863d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 14873d4bde15SVladimir Kondratiev 14883d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 14893d4bde15SVladimir Kondratiev switch (gso_type) { 14903d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 14913d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 14923d4bde15SVladimir Kondratiev * as required by the offloading doc 14933d4bde15SVladimir Kondratiev */ 14943d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 14953d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 14963d4bde15SVladimir Kondratiev is_ipv4 = true; 14973d4bde15SVladimir Kondratiev break; 14983d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 14993d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 15003d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 15013d4bde15SVladimir Kondratiev is_ipv4 = false; 15023d4bde15SVladimir Kondratiev break; 15033d4bde15SVladimir Kondratiev default: 15043d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 15053d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 15063d4bde15SVladimir Kondratiev */ 15073d4bde15SVladimir Kondratiev return -EINVAL; 15083d4bde15SVladimir Kondratiev } 15093d4bde15SVladimir Kondratiev 15103d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 15113d4bde15SVladimir Kondratiev return -EINVAL; 15123d4bde15SVladimir Kondratiev 15133d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 15143d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 15153d4bde15SVladimir Kondratiev */ 15163d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 15173d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 15183d4bde15SVladimir Kondratiev 151910590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 15203d4bde15SVladimir Kondratiev 15213d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 15223d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 15233d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 15243d4bde15SVladimir Kondratiev goto err_exit; 15253d4bde15SVladimir Kondratiev } 15263d4bde15SVladimir Kondratiev 15273d4bde15SVladimir Kondratiev wil_tx_desc_map(hdr_desc, pa, hdrlen, vring_index); 15283d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 15293d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 15303d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 15313d4bde15SVladimir Kondratiev 15323d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15333d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 15343d4bde15SVladimir Kondratiev 15353d4bde15SVladimir Kondratiev descs_used++; 15363d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 15373d4bde15SVladimir Kondratiev 15383d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 15393d4bde15SVladimir Kondratiev if (headlen) { 15403d4bde15SVladimir Kondratiev len = headlen; 15413d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 15423d4bde15SVladimir Kondratiev len); 15433d4bde15SVladimir Kondratiev } else { 15443d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 15453d4bde15SVladimir Kondratiev len = frag->size; 15463d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 15473d4bde15SVladimir Kondratiev } 15483d4bde15SVladimir Kondratiev 15493d4bde15SVladimir Kondratiev while (len) { 15503d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 15513d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 15523d4bde15SVladimir Kondratiev len, rem_data, descs_used); 15533d4bde15SVladimir Kondratiev 15543d4bde15SVladimir Kondratiev if (descs_used == avail) { 1555e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1556e3d2ed94SHamad Kadmany rc = -ENOMEM; 1557e3d2ed94SHamad Kadmany goto mem_error; 15583d4bde15SVladimir Kondratiev } 15593d4bde15SVladimir Kondratiev 15603d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 15613d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 15623d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 15633d4bde15SVladimir Kondratiev 15643d4bde15SVladimir Kondratiev if (!headlen) { 15653d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 15663d4bde15SVladimir Kondratiev frag->size - len, lenmss, 15673d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15683d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 15693d4bde15SVladimir Kondratiev } else { 15703d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 15713d4bde15SVladimir Kondratiev skb->data + 15723d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 15733d4bde15SVladimir Kondratiev lenmss, 15743d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 15753d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 15763d4bde15SVladimir Kondratiev headlen -= lenmss; 15773d4bde15SVladimir Kondratiev } 15783d4bde15SVladimir Kondratiev 1579e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1580e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1581e3d2ed94SHamad Kadmany goto mem_error; 1582e3d2ed94SHamad Kadmany } 15833d4bde15SVladimir Kondratiev 158410590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 15853d4bde15SVladimir Kondratiev 15863d4bde15SVladimir Kondratiev if (!_first_desc) { 15873d4bde15SVladimir Kondratiev _first_desc = _desc; 15883d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 15893d4bde15SVladimir Kondratiev d = first_desc; 15903d4bde15SVladimir Kondratiev } else { 15913d4bde15SVladimir Kondratiev d = &desc_mem; 15923d4bde15SVladimir Kondratiev } 15933d4bde15SVladimir Kondratiev 15943d4bde15SVladimir Kondratiev wil_tx_desc_map(d, pa, lenmss, vring_index); 15953d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 15963d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 15973d4bde15SVladimir Kondratiev skb_net_hdr_len); 15983d4bde15SVladimir Kondratiev 15993d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 16003d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 16013d4bde15SVladimir Kondratiev 16023d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 16033d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 16043d4bde15SVladimir Kondratiev len -= lenmss; 16053d4bde15SVladimir Kondratiev rem_data -= lenmss; 16063d4bde15SVladimir Kondratiev 16073d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 16083d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 16093d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 16103d4bde15SVladimir Kondratiev 16113d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 16123d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 16133d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 16143d4bde15SVladimir Kondratiev /* first segment include hdr desc for 16153d4bde15SVladimir Kondratiev * release 16163d4bde15SVladimir Kondratiev */ 16173d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 16183d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16193d4bde15SVladimir Kondratiev sg_desc_cnt + 16203d4bde15SVladimir Kondratiev 1); 16213d4bde15SVladimir Kondratiev hdr_compensation_need = false; 16223d4bde15SVladimir Kondratiev } else { 16233d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 16243d4bde15SVladimir Kondratiev sg_desc_cnt); 16253d4bde15SVladimir Kondratiev } 16263d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 16273d4bde15SVladimir Kondratiev 16283d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 16293d4bde15SVladimir Kondratiev 16303d4bde15SVladimir Kondratiev /* first descriptor may also be the last 16313d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 16323d4bde15SVladimir Kondratiev * it twice 16333d4bde15SVladimir Kondratiev */ 16343d4bde15SVladimir Kondratiev if (first_desc != d) 16353d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 16363d4bde15SVladimir Kondratiev 16373d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 16383d4bde15SVladimir Kondratiev * of this TS processing 16393d4bde15SVladimir Kondratiev */ 16403d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 16413d4bde15SVladimir Kondratiev *_desc = *d; 16423d4bde15SVladimir Kondratiev 16433d4bde15SVladimir Kondratiev rem_data = mss; 16443d4bde15SVladimir Kondratiev _first_desc = NULL; 16453d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 16463d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 16473d4bde15SVladimir Kondratiev *_desc = *d; 16483d4bde15SVladimir Kondratiev } 16493d4bde15SVladimir Kondratiev } 16503d4bde15SVladimir Kondratiev 16513d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 16523d4bde15SVladimir Kondratiev * in this case d pointer is invalid 16533d4bde15SVladimir Kondratiev */ 16543d4bde15SVladimir Kondratiev if (_first_desc == _desc) 16553d4bde15SVladimir Kondratiev d = first_desc; 16563d4bde15SVladimir Kondratiev 16573d4bde15SVladimir Kondratiev /* Last data descriptor */ 16583d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 16593d4bde15SVladimir Kondratiev *_desc = *d; 16603d4bde15SVladimir Kondratiev 16613d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 16623d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 16633d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 16643d4bde15SVladimir Kondratiev 16653d4bde15SVladimir Kondratiev /* hold reference to skb 16663d4bde15SVladimir Kondratiev * to prevent skb release before accounting 16673d4bde15SVladimir Kondratiev * in case of immediate "tx done" 16683d4bde15SVladimir Kondratiev */ 16693d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 16703d4bde15SVladimir Kondratiev 16713d4bde15SVladimir Kondratiev /* performance monitoring */ 167210590c6aSGidon Studinski used = wil_ring_used_tx(vring); 167310590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 16743d4bde15SVladimir Kondratiev used, used + descs_used)) { 16753d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 16763d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 16773d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 16783d4bde15SVladimir Kondratiev } 16793d4bde15SVladimir Kondratiev 1680eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1681eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1682eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1683eb26cff1SMaya Erez * skb before it was completed. 1684eb26cff1SMaya Erez */ 1685eb26cff1SMaya Erez wmb(); 1686eb26cff1SMaya Erez 16873d4bde15SVladimir Kondratiev /* advance swhead */ 168810590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1689e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 16903d4bde15SVladimir Kondratiev 16913d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 16923d4bde15SVladimir Kondratiev * committing them to HW 16933d4bde15SVladimir Kondratiev */ 16943d4bde15SVladimir Kondratiev wmb(); 16953d4bde15SVladimir Kondratiev 1696b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 16973d4bde15SVladimir Kondratiev return 0; 16983d4bde15SVladimir Kondratiev 1699e3d2ed94SHamad Kadmany mem_error: 17003d4bde15SVladimir Kondratiev while (descs_used > 0) { 17013d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 17023d4bde15SVladimir Kondratiev 1703a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 170410590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 170510590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 17063d4bde15SVladimir Kondratiev *d = *_desc; 17073d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 17083d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 17093d4bde15SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 17103d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 17113d4bde15SVladimir Kondratiev descs_used--; 17123d4bde15SVladimir Kondratiev } 17133d4bde15SVladimir Kondratiev err_exit: 1714e3d2ed94SHamad Kadmany return rc; 17153d4bde15SVladimir Kondratiev } 17163d4bde15SVladimir Kondratiev 1717e00243faSLior David static int __wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 171810590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 17192be7d22fSVladimir Kondratiev { 17202be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 172168ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 172268ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 17232be7d22fSVladimir Kondratiev u32 swhead = vring->swhead; 172410590c6aSGidon Studinski int avail = wil_ring_avail_tx(vring); 17252be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 1726504937d4SKirshenbaum Erez uint f = 0; 172710590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 172810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 17292be7d22fSVladimir Kondratiev uint i = swhead; 17302be7d22fSVladimir Kondratiev dma_addr_t pa; 17310436fd9aSVladimir Shulman int used; 173210590c6aSGidon Studinski bool mcast = (vring_index == vif->bcast_ring); 173341d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 17342be7d22fSVladimir Kondratiev 173510590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 173610590c6aSGidon Studinski skb->len, vring_index, nr_frags); 17372be7d22fSVladimir Kondratiev 17385933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 17395933a06dSVladimir Kondratiev return -EINVAL; 17405933a06dSVladimir Kondratiev 174133c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 174270801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 17435b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 17445b29c573SVladimir Kondratiev vring_index, 1 + nr_frags); 17452be7d22fSVladimir Kondratiev return -ENOMEM; 17462be7d22fSVladimir Kondratiev } 174710590c6aSGidon Studinski _d = &vring->va[i].tx.legacy; 17482be7d22fSVladimir Kondratiev 17498fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 17502be7d22fSVladimir Kondratiev 17515b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", vring_index, 17525b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 17537743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 17542be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 17552be7d22fSVladimir Kondratiev 17562be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 17572be7d22fSVladimir Kondratiev return -EINVAL; 17582232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 17592be7d22fSVladimir Kondratiev /* 1-st segment */ 176041d6b093SVladimir Kondratiev wil_tx_desc_map(d, pa, len, vring_index); 176141d6b093SVladimir Kondratiev if (unlikely(mcast)) { 176241d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 1763230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 176441d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 176541d6b093SVladimir Kondratiev } 1766504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 17673d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 17685b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 1769504937d4SKirshenbaum Erez vring_index); 1770504937d4SKirshenbaum Erez goto dma_error; 1771504937d4SKirshenbaum Erez } 1772504937d4SKirshenbaum Erez 1773c236658fSVladimir Kondratiev vring->ctx[i].nr_frags = nr_frags; 17743d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 177568ada71eSVladimir Kondratiev 17762be7d22fSVladimir Kondratiev /* middle segments */ 1777504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 17782be7d22fSVladimir Kondratiev const struct skb_frag_struct *frag = 17792be7d22fSVladimir Kondratiev &skb_shinfo(skb)->frags[f]; 17802be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 17818fe59627SVladimir Kondratiev 1782e59d16c0SVladimir Kondratiev *_d = *d; 17835b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 17845b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 17855b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 17862be7d22fSVladimir Kondratiev i = (swhead + f + 1) % vring->size; 178710590c6aSGidon Studinski _d = &vring->va[i].tx.legacy; 17882be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 17892be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 1790e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1791e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 1792e3d2ed94SHamad Kadmany vring_index); 17932be7d22fSVladimir Kondratiev goto dma_error; 1794e3d2ed94SHamad Kadmany } 17952232abd5SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 179699b55bd2SKirshenbaum Erez wil_tx_desc_map(d, pa, len, vring_index); 1797c236658fSVladimir Kondratiev /* no need to check return code - 1798c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 1799c236658fSVladimir Kondratiev * it will succeed here too 1800c236658fSVladimir Kondratiev */ 18013d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 18022be7d22fSVladimir Kondratiev } 18032be7d22fSVladimir Kondratiev /* for the last seg only */ 18042be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 1805668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 18062be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 180768ada71eSVladimir Kondratiev *_d = *d; 18085b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", vring_index, i); 18095b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 18105b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 18112be7d22fSVladimir Kondratiev 18126cdadd4dSVladimir Kondratiev /* hold reference to skb 18136cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 18146cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 18156cdadd4dSVladimir Kondratiev */ 18166cdadd4dSVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 18176cdadd4dSVladimir Kondratiev 18180436fd9aSVladimir Shulman /* performance monitoring */ 181910590c6aSGidon Studinski used = wil_ring_used_tx(vring); 182010590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 18210436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 18227c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 18230436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 18240436fd9aSVladimir Shulman vring_index, used, used + nr_frags + 1); 18250436fd9aSVladimir Shulman } 18267c0acf86SVladimir Kondratiev 1827eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1828eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1829eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1830eb26cff1SMaya Erez * skb before it was completed. 1831eb26cff1SMaya Erez */ 1832eb26cff1SMaya Erez wmb(); 1833eb26cff1SMaya Erez 18342be7d22fSVladimir Kondratiev /* advance swhead */ 183510590c6aSGidon Studinski wil_ring_advance_head(vring, nr_frags + 1); 18365b29c573SVladimir Kondratiev wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", vring_index, swhead, 18375b29c573SVladimir Kondratiev vring->swhead); 183898658095SVladimir Kondratiev trace_wil6210_tx(vring_index, swhead, skb->len, nr_frags); 18393d4bde15SVladimir Kondratiev 18403d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 18413d4bde15SVladimir Kondratiev * committing them to HW 18423d4bde15SVladimir Kondratiev */ 18433d4bde15SVladimir Kondratiev wmb(); 18443d4bde15SVladimir Kondratiev 1845b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 18462be7d22fSVladimir Kondratiev 18472be7d22fSVladimir Kondratiev return 0; 18482be7d22fSVladimir Kondratiev dma_error: 18492be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 1850c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 1851c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 1852c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 18537e594444SVladimir Kondratiev 18542be7d22fSVladimir Kondratiev i = (swhead + f) % vring->size; 1855c2a146f6SVladimir Kondratiev ctx = &vring->ctx[i]; 185610590c6aSGidon Studinski _d = &vring->va[i].tx.legacy; 185768ada71eSVladimir Kondratiev *d = *_d; 185868ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 18592232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 1860f88f113aSVladimir Kondratiev 1861f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 18622be7d22fSVladimir Kondratiev } 18632be7d22fSVladimir Kondratiev 18642be7d22fSVladimir Kondratiev return -EINVAL; 18652be7d22fSVladimir Kondratiev } 18662be7d22fSVladimir Kondratiev 1867e00243faSLior David static int wil_tx_vring(struct wil6210_priv *wil, struct wil6210_vif *vif, 186810590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 18695933a06dSVladimir Kondratiev { 187010590c6aSGidon Studinski int ring_index = vring - wil->ring_tx; 187110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 18725933a06dSVladimir Kondratiev int rc; 18735933a06dSVladimir Kondratiev 18745933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 18753d4bde15SVladimir Kondratiev 1876fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1877fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 1878fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 1879fe9ee51eSMaya Erez wil_dbg_txrx(wil, 1880fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 1881fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 1882fe9ee51eSMaya Erez return -EINVAL; 1883fe9ee51eSMaya Erez } 1884fe9ee51eSMaya Erez 18853d4bde15SVladimir Kondratiev rc = (skb_is_gso(skb) ? __wil_tx_vring_tso : __wil_tx_vring) 1886e00243faSLior David (wil, vif, vring, skb); 18873d4bde15SVladimir Kondratiev 18885933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 18893d4bde15SVladimir Kondratiev 18905933a06dSVladimir Kondratiev return rc; 18915933a06dSVladimir Kondratiev } 18925933a06dSVladimir Kondratiev 1893f9e3033fSDedy Lansky /** 1894f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 18955bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 1896f9e3033fSDedy Lansky * 1897f9e3033fSDedy Lansky * This function does one of two checks: 1898f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 1899f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 1900f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 1901f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 1902f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 1903f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 1904f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 1905f9e3033fSDedy Lansky * 1906f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 1907f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 1908f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 1909f9e3033fSDedy Lansky */ 1910f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 19115bd60982SLior David struct wil6210_vif *vif, 191210590c6aSGidon Studinski struct wil_ring *ring, 1913f9e3033fSDedy Lansky bool check_stop) 1914f9e3033fSDedy Lansky { 1915f9e3033fSDedy Lansky int i; 1916f9e3033fSDedy Lansky 19175bd60982SLior David if (unlikely(!vif)) 19185bd60982SLior David return; 1919f9e3033fSDedy Lansky 192010590c6aSGidon Studinski if (ring) 19215bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 192210590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 19235bd60982SLior David vif->net_queue_stopped); 19245bd60982SLior David else 19255bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 19265bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 19275bd60982SLior David 19285bd60982SLior David if (check_stop == vif->net_queue_stopped) 1929f9e3033fSDedy Lansky /* net queues already in desired state */ 1930f9e3033fSDedy Lansky return; 1931f9e3033fSDedy Lansky 1932f9e3033fSDedy Lansky if (check_stop) { 193310590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 1934f9e3033fSDedy Lansky /* not enough room in the vring */ 19355bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 19365bd60982SLior David vif->net_queue_stopped = true; 1937f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 1938f9e3033fSDedy Lansky } 1939f9e3033fSDedy Lansky return; 1940f9e3033fSDedy Lansky } 1941f9e3033fSDedy Lansky 1942fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 1943fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 1944fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 1945fe9ee51eSMaya Erez return; 1946fe9ee51eSMaya Erez 1947f9e3033fSDedy Lansky /* check wake */ 1948f9e3033fSDedy Lansky for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) { 194910590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 195010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 1951f9e3033fSDedy Lansky 195210590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 195310590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 1954f9e3033fSDedy Lansky continue; 1955f9e3033fSDedy Lansky 195610590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 195710590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 195810590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 1959f9e3033fSDedy Lansky return; 1960f9e3033fSDedy Lansky } 1961f9e3033fSDedy Lansky } 1962f9e3033fSDedy Lansky 196310590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 196410590c6aSGidon Studinski /* enough room in the ring */ 1965f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 19665bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 19675bd60982SLior David vif->net_queue_stopped = false; 1968f9e3033fSDedy Lansky } 1969f9e3033fSDedy Lansky } 1970f9e3033fSDedy Lansky 19715bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 197210590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 1973f9e3033fSDedy Lansky { 1974f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 197510590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 1976f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 1977f9e3033fSDedy Lansky } 1978f9e3033fSDedy Lansky 19795bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 198010590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 1981f9e3033fSDedy Lansky { 1982f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 198310590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 1984f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 1985f9e3033fSDedy Lansky } 1986f9e3033fSDedy Lansky 19872be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 19882be7d22fSVladimir Kondratiev { 1989e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 1990e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 19913df2cd36SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 199241d6b093SVladimir Kondratiev bool bcast = is_multicast_ether_addr(eth->h_dest); 199310590c6aSGidon Studinski struct wil_ring *vring; 1994aa27deaaSVladimir Kondratiev static bool pr_once_fw; 19952be7d22fSVladimir Kondratiev int rc; 19962be7d22fSVladimir Kondratiev 1997af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 199833c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 1999aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 20002be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2001aa27deaaSVladimir Kondratiev pr_once_fw = true; 2002aa27deaaSVladimir Kondratiev } 20032be7d22fSVladimir Kondratiev goto drop; 20042be7d22fSVladimir Kondratiev } 20055bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 20065bd60982SLior David wil_dbg_ratelimited(wil, 20075bd60982SLior David "VIF not connected, packet dropped\n"); 20082be7d22fSVladimir Kondratiev goto drop; 20092be7d22fSVladimir Kondratiev } 2010e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 20112be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 20122be7d22fSVladimir Kondratiev goto drop; 20132be7d22fSVladimir Kondratiev } 2014aa27deaaSVladimir Kondratiev pr_once_fw = false; 2015d58db4e4SVladimir Kondratiev 20162be7d22fSVladimir Kondratiev /* find vring */ 2017e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2018a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 201910590c6aSGidon Studinski vring = wil_find_tx_ring_sta(wil, vif, skb); 2020a895cb8bSLior David } else if (bcast) { 2021e00243faSLior David if (vif->pbss) 2022a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2023a895cb8bSLior David * all stations VRINGs 2024a895cb8bSLior David */ 2025e00243faSLior David vring = wil_find_tx_bcast_2(wil, vif, skb); 2026e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2027a895cb8bSLior David /* AP has a dedicated bcast VRING */ 2028e00243faSLior David vring = wil_find_tx_bcast_1(wil, vif, skb); 2029a895cb8bSLior David else 2030a895cb8bSLior David /* unexpected combination, fallback to duplicating 2031a895cb8bSLior David * the skb in all stations VRINGs 2032a895cb8bSLior David */ 2033e00243faSLior David vring = wil_find_tx_bcast_2(wil, vif, skb); 2034a895cb8bSLior David } else { 2035a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 2036e00243faSLior David vring = wil_find_tx_ucast(wil, vif, skb); 203754ed90a8SVladimir Kondratiev } 203833c477fdSVladimir Kondratiev if (unlikely(!vring)) { 203910590c6aSGidon Studinski wil_dbg_txrx(wil, "No Tx RING found for %pM\n", eth->h_dest); 20402be7d22fSVladimir Kondratiev goto drop; 20412be7d22fSVladimir Kondratiev } 20422be7d22fSVladimir Kondratiev /* set up vring entry */ 2043e00243faSLior David rc = wil_tx_vring(wil, vif, vring, skb); 2044d58db4e4SVladimir Kondratiev 20452be7d22fSVladimir Kondratiev switch (rc) { 20462be7d22fSVladimir Kondratiev case 0: 2047f9e3033fSDedy Lansky /* shall we stop net queues? */ 20485bd60982SLior David wil_update_net_queues_bh(wil, vif, vring, true); 2049795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 20502be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20512be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 20522be7d22fSVladimir Kondratiev case -ENOMEM: 20532be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 20542be7d22fSVladimir Kondratiev default: 2055afda8bb5SVladimir Kondratiev break; /* goto drop; */ 20562be7d22fSVladimir Kondratiev } 20572be7d22fSVladimir Kondratiev drop: 20582be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 20592be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 20602be7d22fSVladimir Kondratiev 20612be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 20622be7d22fSVladimir Kondratiev } 20632be7d22fSVladimir Kondratiev 2064713c8a29SVladimir Kondratiev static inline bool wil_need_txstat(struct sk_buff *skb) 2065713c8a29SVladimir Kondratiev { 2066713c8a29SVladimir Kondratiev struct ethhdr *eth = (void *)skb->data; 2067713c8a29SVladimir Kondratiev 2068713c8a29SVladimir Kondratiev return is_unicast_ether_addr(eth->h_dest) && skb->sk && 2069713c8a29SVladimir Kondratiev (skb_shinfo(skb)->tx_flags & SKBTX_WIFI_STATUS); 2070713c8a29SVladimir Kondratiev } 2071713c8a29SVladimir Kondratiev 2072713c8a29SVladimir Kondratiev static inline void wil_consume_skb(struct sk_buff *skb, bool acked) 2073713c8a29SVladimir Kondratiev { 2074713c8a29SVladimir Kondratiev if (unlikely(wil_need_txstat(skb))) 2075713c8a29SVladimir Kondratiev skb_complete_wifi_ack(skb, acked); 2076713c8a29SVladimir Kondratiev else 2077713c8a29SVladimir Kondratiev acked ? dev_consume_skb_any(skb) : dev_kfree_skb_any(skb); 2078713c8a29SVladimir Kondratiev } 2079713c8a29SVladimir Kondratiev 20802be7d22fSVladimir Kondratiev /** 20812be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 20822be7d22fSVladimir Kondratiev * 2083e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2084e0287c4aSVladimir Kondratiev * 20852be7d22fSVladimir Kondratiev * Safe to call from IRQ 20862be7d22fSVladimir Kondratiev */ 20875bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 20882be7d22fSVladimir Kondratiev { 20895bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 20905bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 20912be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 209210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 209310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2094e0287c4aSVladimir Kondratiev int done = 0; 209510590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 209641d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2097c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20980436fd9aSVladimir Shulman int used_before_complete; 20990436fd9aSVladimir Shulman int used_new; 21002be7d22fSVladimir Kondratiev 210133c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 21022be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2103e0287c4aSVladimir Kondratiev return 0; 21042be7d22fSVladimir Kondratiev } 21052be7d22fSVladimir Kondratiev 210633c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2107097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2108097638a0SVladimir Kondratiev return 0; 2109097638a0SVladimir Kondratiev } 2110097638a0SVladimir Kondratiev 2111af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 21122be7d22fSVladimir Kondratiev 211310590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 21140436fd9aSVladimir Shulman 211541d6b093SVladimir Kondratiev if (cid < WIL6210_MAX_CID) 211641d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 211741d6b093SVladimir Kondratiev 211810590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2119c236658fSVladimir Kondratiev int new_swtail; 2120c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2121c236658fSVladimir Kondratiev /** 2122c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 21233d4bde15SVladimir Kondratiev * last fragment. look for it. 21243d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2125c236658fSVladimir Kondratiev */ 2126c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2127c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2128c236658fSVladimir Kondratiev 212910590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 213033c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2131c236658fSVladimir Kondratiev break; 2132c236658fSVladimir Kondratiev 2133c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2134c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 21354de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21367e594444SVladimir Kondratiev u16 dmalen; 213776dfa4b7SVladimir Kondratiev struct sk_buff *skb; 213876dfa4b7SVladimir Kondratiev 213976dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 214076dfa4b7SVladimir Kondratiev skb = ctx->skb; 214110590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 21424de41befSVladimir Kondratiev 214368ada71eSVladimir Kondratiev *d = *_d; 21444de41befSVladimir Kondratiev 21457e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 214698658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 214798658095SVladimir Kondratiev d->dma.error); 21487743882dSVladimir Kondratiev wil_dbg_txrx(wil, 21495b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 21505b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 21515b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 21525b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 21532be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 21542be7d22fSVladimir Kondratiev 21552232abd5SVladimir Kondratiev wil_txdesc_unmap(dev, d, ctx); 2156f88f113aSVladimir Kondratiev 21572be7d22fSVladimir Kondratiev if (skb) { 215833c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2159795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2160795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 216141d6b093SVladimir Kondratiev if (stats) { 216241d6b093SVladimir Kondratiev stats->tx_packets++; 2163c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 216441d6b093SVladimir Kondratiev } 2165795ce734SVladimir Kondratiev } else { 2166795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 216741d6b093SVladimir Kondratiev if (stats) 2168c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2169795ce734SVladimir Kondratiev } 2170713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 21712be7d22fSVladimir Kondratiev } 2172f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2173eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 217410590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2175eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2176eb26cff1SMaya Erez * is completed. 2177eb26cff1SMaya Erez */ 2178eb26cff1SMaya Erez wmb(); 2179c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 218003269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 218103269c65SVladimir Kondratiev * so hardware will not try to process this desc., 218203269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 218303269c65SVladimir Kondratiev */ 218410590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2185e0287c4aSVladimir Kondratiev done++; 21862be7d22fSVladimir Kondratiev } 2187c236658fSVladimir Kondratiev } 218867c3e1b4SVladimir Kondratiev 21890436fd9aSVladimir Shulman /* performance monitoring */ 219010590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 219110590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 21920436fd9aSVladimir Shulman used_new, used_before_complete)) { 21930436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 21940436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 21957c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 21967c0acf86SVladimir Kondratiev } 219767c3e1b4SVladimir Kondratiev 2198f9e3033fSDedy Lansky /* shall we wake net queues? */ 2199f9e3033fSDedy Lansky if (done) 22005bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2201e0287c4aSVladimir Kondratiev 2202e0287c4aSVladimir Kondratiev return done; 22032be7d22fSVladimir Kondratiev } 2204