185630469SLior David // SPDX-License-Identifier: ISC 22be7d22fSVladimir Kondratiev /* 3af3db60aSLazar Alexei * Copyright (c) 2012-2017 Qualcomm Atheros, Inc. 4387f3794SMaya Erez * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved. 52be7d22fSVladimir Kondratiev */ 62be7d22fSVladimir Kondratiev 72be7d22fSVladimir Kondratiev #include <linux/etherdevice.h> 82be7d22fSVladimir Kondratiev #include <net/ieee80211_radiotap.h> 92be7d22fSVladimir Kondratiev #include <linux/if_arp.h> 102be7d22fSVladimir Kondratiev #include <linux/moduleparam.h> 11504937d4SKirshenbaum Erez #include <linux/ip.h> 12504937d4SKirshenbaum Erez #include <linux/ipv6.h> 135e5f069cSAhmad Masri #include <linux/if_vlan.h> 14504937d4SKirshenbaum Erez #include <net/ipv6.h> 150786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 162be7d22fSVladimir Kondratiev 172be7d22fSVladimir Kondratiev #include "wil6210.h" 182be7d22fSVladimir Kondratiev #include "wmi.h" 192be7d22fSVladimir Kondratiev #include "txrx.h" 2098658095SVladimir Kondratiev #include "trace.h" 217be13fc3SGidon Studinski #include "txrx_edma.h" 222be7d22fSVladimir Kondratiev 23c406ea7cSVladimir Kondratiev bool rx_align_2; 2478484c44SMaya Erez module_param(rx_align_2, bool, 0444); 25c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 26c406ea7cSVladimir Kondratiev 2752a45702SLior David bool rx_large_buf; 2852a45702SLior David module_param(rx_large_buf, bool, 0444); 2952a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 3052a45702SLior David 310439a5e0SDedy Lansky /* Drop Tx packets in case Tx ring is full */ 320439a5e0SDedy Lansky bool drop_if_ring_full; 330439a5e0SDedy Lansky 34c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 35c406ea7cSVladimir Kondratiev { 36c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 37c406ea7cSVladimir Kondratiev } 38c406ea7cSVladimir Kondratiev 3910590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 4010590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 412be7d22fSVladimir Kondratiev { 4210590c6aSGidon Studinski return ring->size / 8; 432be7d22fSVladimir Kondratiev } 442be7d22fSVladimir Kondratiev 4510590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 4610590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 472be7d22fSVladimir Kondratiev { 4810590c6aSGidon Studinski return ring->size / 4; 495bb6423eSVladimir Kondratiev } 505bb6423eSVladimir Kondratiev 51f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 5210590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 53f9e3033fSDedy Lansky { 5410590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 55f9e3033fSDedy Lansky } 56f9e3033fSDedy Lansky 57f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 5810590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 59f9e3033fSDedy Lansky { 6010590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 61f9e3033fSDedy Lansky } 62f9e3033fSDedy Lansky 63fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 64fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 65fe9ee51eSMaya Erez { 66fe9ee51eSMaya Erez int i; 67fe9ee51eSMaya Erez unsigned long data_comp_to; 68df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 69fe9ee51eSMaya Erez 70df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 7110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 7210590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 7310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 7410590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 75fe9ee51eSMaya Erez 76fe9ee51eSMaya Erez spin_lock(&txdata->lock); 77fe9ee51eSMaya Erez 78fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 79fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 80fe9ee51eSMaya Erez continue; 81fe9ee51eSMaya Erez } 82fe9ee51eSMaya Erez 83fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 84fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 85fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 8610590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 87fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 88fe9ee51eSMaya Erez wil_dbg_pm(wil, 89fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 90fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 91fe9ee51eSMaya Erez return false; 92fe9ee51eSMaya Erez } 93fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 94fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 95fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 96fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 97fe9ee51eSMaya Erez msleep(20); 98fe9ee51eSMaya Erez spin_lock(&txdata->lock); 99fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 100fe9ee51eSMaya Erez break; 101fe9ee51eSMaya Erez } 102fe9ee51eSMaya Erez } 103fe9ee51eSMaya Erez 104fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 105fe9ee51eSMaya Erez } 106fe9ee51eSMaya Erez 107fe9ee51eSMaya Erez return true; 108fe9ee51eSMaya Erez } 109fe9ee51eSMaya Erez 11010590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1112be7d22fSVladimir Kondratiev { 1122be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1132be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1142be7d22fSVladimir Kondratiev uint i; 1152be7d22fSVladimir Kondratiev 116af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1179cf10d62SVladimir Kondratiev 1182be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1192be7d22fSVladimir Kondratiev 1202be7d22fSVladimir Kondratiev vring->swhead = 0; 1212be7d22fSVladimir Kondratiev vring->swtail = 0; 122f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1232be7d22fSVladimir Kondratiev if (!vring->ctx) { 1242be7d22fSVladimir Kondratiev vring->va = NULL; 1252be7d22fSVladimir Kondratiev return -ENOMEM; 1262be7d22fSVladimir Kondratiev } 127f2de576dSHamad Kadmany 1280436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 129f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 130f2de576dSHamad Kadmany * 131f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 132f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1333dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1343dc2c13bSLazar Alexei * allocation before allocating vring memory. 135f2de576dSHamad Kadmany * 136f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 137f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 138f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1392be7d22fSVladimir Kondratiev */ 1403dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 141f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 142f2de576dSHamad Kadmany 1432be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1442be7d22fSVladimir Kondratiev if (!vring->va) { 1452be7d22fSVladimir Kondratiev kfree(vring->ctx); 1462be7d22fSVladimir Kondratiev vring->ctx = NULL; 1472be7d22fSVladimir Kondratiev return -ENOMEM; 1482be7d22fSVladimir Kondratiev } 149f2de576dSHamad Kadmany 1503dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1513dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1523dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 153f2de576dSHamad Kadmany 1542be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1552be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1562be7d22fSVladimir Kondratiev * we can use any 1572be7d22fSVladimir Kondratiev */ 1582be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 15910590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 16010590c6aSGidon Studinski &vring->va[i].tx.legacy; 1618fe59627SVladimir Kondratiev 16268ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1632be7d22fSVladimir Kondratiev } 1642be7d22fSVladimir Kondratiev 16539c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 16639c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1672be7d22fSVladimir Kondratiev 1682be7d22fSVladimir Kondratiev return 0; 1692be7d22fSVladimir Kondratiev } 1702be7d22fSVladimir Kondratiev 1719202d7b6SMaya Erez static void wil_txdesc_unmap(struct device *dev, union wil_tx_desc *desc, 1722232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1732232abd5SVladimir Kondratiev { 1749202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 1752232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1762232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1778fe59627SVladimir Kondratiev 1782232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1792232abd5SVladimir Kondratiev case wil_mapped_as_single: 1802232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1812232abd5SVladimir Kondratiev break; 1822232abd5SVladimir Kondratiev case wil_mapped_as_page: 1832232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1842232abd5SVladimir Kondratiev break; 1852232abd5SVladimir Kondratiev default: 1862232abd5SVladimir Kondratiev break; 1872232abd5SVladimir Kondratiev } 1882232abd5SVladimir Kondratiev } 1892232abd5SVladimir Kondratiev 19096c93589SGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring) 1912be7d22fSVladimir Kondratiev { 1922be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1932be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1942be7d22fSVladimir Kondratiev 1959b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 19696c93589SGidon Studinski if (!vring->is_rx) { 19710590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 198ef77285fSVladimir Kondratiev 199ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 200ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 201ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 202ef77285fSVladimir Kondratiev } else { 203ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 204ef77285fSVladimir Kondratiev vring->size, vring->va, 205ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 206ef77285fSVladimir Kondratiev } 207ef77285fSVladimir Kondratiev 20810590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 20968ada71eSVladimir Kondratiev dma_addr_t pa; 2107e594444SVladimir Kondratiev u16 dmalen; 211f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 21268ada71eSVladimir Kondratiev 21396c93589SGidon Studinski if (!vring->is_rx) { 21468ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21568ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 21610590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 21768ada71eSVladimir Kondratiev 218f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 21934b8886eSMaya Erez if (!ctx) { 22034b8886eSMaya Erez wil_dbg_txrx(wil, 22134b8886eSMaya Erez "ctx(%d) was already completed\n", 22234b8886eSMaya Erez vring->swtail); 22310590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 22434b8886eSMaya Erez continue; 22534b8886eSMaya Erez } 22668ada71eSVladimir Kondratiev *d = *_d; 2279202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 228f88f113aSVladimir Kondratiev if (ctx->skb) 229f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 23010590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2312be7d22fSVladimir Kondratiev } else { /* rx */ 23268ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 23368ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 23410590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 23568ada71eSVladimir Kondratiev 236f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 23768ada71eSVladimir Kondratiev *d = *_d; 23868ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2397e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2407e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 241f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 24210590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2432be7d22fSVladimir Kondratiev } 2442be7d22fSVladimir Kondratiev } 2452be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2462be7d22fSVladimir Kondratiev kfree(vring->ctx); 2472be7d22fSVladimir Kondratiev vring->pa = 0; 2482be7d22fSVladimir Kondratiev vring->va = NULL; 2492be7d22fSVladimir Kondratiev vring->ctx = NULL; 2502be7d22fSVladimir Kondratiev } 2512be7d22fSVladimir Kondratiev 252e6636d64SLee Jones /* Allocate one skb for Rx VRING 2532be7d22fSVladimir Kondratiev * 2542be7d22fSVladimir Kondratiev * Safe to call from IRQ 2552be7d22fSVladimir Kondratiev */ 25610590c6aSGidon Studinski static int wil_vring_alloc_skb(struct wil6210_priv *wil, struct wil_ring *vring, 2572be7d22fSVladimir Kondratiev u32 i, int headroom) 2582be7d22fSVladimir Kondratiev { 2592be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 26052a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + wil_rx_snaplen(); 26168ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 26210590c6aSGidon Studinski volatile struct vring_rx_desc *_d = &vring->va[i].rx.legacy; 2632be7d22fSVladimir Kondratiev dma_addr_t pa; 2642be7d22fSVladimir Kondratiev struct sk_buff *skb = dev_alloc_skb(sz + headroom); 2658fe59627SVladimir Kondratiev 2662be7d22fSVladimir Kondratiev if (unlikely(!skb)) 2672be7d22fSVladimir Kondratiev return -ENOMEM; 2682be7d22fSVladimir Kondratiev 2692be7d22fSVladimir Kondratiev skb_reserve(skb, headroom); 2702be7d22fSVladimir Kondratiev skb_put(skb, sz); 2712be7d22fSVladimir Kondratiev 2720b853210SMaya Erez /** 2730b853210SMaya Erez * Make sure that the network stack calculates checksum for packets 2740b853210SMaya Erez * which failed the HW checksum calculation 2750b853210SMaya Erez */ 2760b853210SMaya Erez skb->ip_summed = CHECKSUM_NONE; 2770b853210SMaya Erez 2782be7d22fSVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); 2792be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 2802be7d22fSVladimir Kondratiev kfree_skb(skb); 2812be7d22fSVladimir Kondratiev return -ENOMEM; 2822be7d22fSVladimir Kondratiev } 2832be7d22fSVladimir Kondratiev 28448c963afSVladimir Kondratiev d->dma.d0 = RX_DMA_D0_CMD_DMA_RT | RX_DMA_D0_CMD_DMA_IT; 28568ada71eSVladimir Kondratiev wil_desc_addr_set(&d->dma.addr, pa); 2862be7d22fSVladimir Kondratiev /* ip_length don't care */ 2872be7d22fSVladimir Kondratiev /* b11 don't care */ 2882be7d22fSVladimir Kondratiev /* error don't care */ 2892be7d22fSVladimir Kondratiev d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 2907e594444SVladimir Kondratiev d->dma.length = cpu_to_le16(sz); 29168ada71eSVladimir Kondratiev *_d = *d; 292f88f113aSVladimir Kondratiev vring->ctx[i].skb = skb; 2932be7d22fSVladimir Kondratiev 2942be7d22fSVladimir Kondratiev return 0; 2952be7d22fSVladimir Kondratiev } 2962be7d22fSVladimir Kondratiev 297e6636d64SLee Jones /* Adds radiotap header 2982be7d22fSVladimir Kondratiev * 2992be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3002be7d22fSVladimir Kondratiev * 3012be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3022be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3032be7d22fSVladimir Kondratiev * - Phy info 3042be7d22fSVladimir Kondratiev */ 3052be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 30633e61169SVladimir Kondratiev struct sk_buff *skb) 3072be7d22fSVladimir Kondratiev { 3082be7d22fSVladimir Kondratiev struct wil6210_rtap { 3092be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3102be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3112be7d22fSVladimir Kondratiev /* flags */ 3122be7d22fSVladimir Kondratiev u8 flags; 3132be7d22fSVladimir Kondratiev /* channel */ 3142be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3152be7d22fSVladimir Kondratiev __le16 chnl_flags; 3162be7d22fSVladimir Kondratiev /* MCS */ 3172be7d22fSVladimir Kondratiev u8 mcs_present; 3182be7d22fSVladimir Kondratiev u8 mcs_flags; 3192be7d22fSVladimir Kondratiev u8 mcs_index; 3202be7d22fSVladimir Kondratiev } __packed; 32133e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 322387f3794SMaya Erez struct wil6210_rtap *rtap; 3232be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3247d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3252be7d22fSVladimir Kondratiev 3262be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3272be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3289165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3292be7d22fSVladimir Kondratiev return; 3302be7d22fSVladimir Kondratiev } 3312be7d22fSVladimir Kondratiev 332387f3794SMaya Erez rtap = skb_push(skb, rtap_len); 333387f3794SMaya Erez memset(rtap, 0, rtap_len); 3342be7d22fSVladimir Kondratiev 335387f3794SMaya Erez rtap->rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 336387f3794SMaya Erez rtap->rthdr.it_len = cpu_to_le16(rtap_len); 337387f3794SMaya Erez rtap->rthdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | 3382be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3392be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3402be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 341387f3794SMaya Erez rtap->flags |= IEEE80211_RADIOTAP_F_BADFCS; 3422be7d22fSVladimir Kondratiev 343387f3794SMaya Erez rtap->chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 344387f3794SMaya Erez rtap->chnl_flags = cpu_to_le16(0); 3452be7d22fSVladimir Kondratiev 346387f3794SMaya Erez rtap->mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 347387f3794SMaya Erez rtap->mcs_flags = 0; 348387f3794SMaya Erez rtap->mcs_index = wil_rxdesc_mcs(d); 3492be7d22fSVladimir Kondratiev } 3502be7d22fSVladimir Kondratiev 3517be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 352fe9ee51eSMaya Erez { 353fe9ee51eSMaya Erez struct vring_rx_desc *_d; 35410590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 355fe9ee51eSMaya Erez 35610590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 357fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 358fe9ee51eSMaya Erez return false; 359fe9ee51eSMaya Erez 360fe9ee51eSMaya Erez return true; 361fe9ee51eSMaya Erez } 362fe9ee51eSMaya Erez 363bf0353a6SAhmad Masri static int wil_rx_get_cid_by_skb(struct wil6210_priv *wil, struct sk_buff *skb) 364bf0353a6SAhmad Masri { 365bf0353a6SAhmad Masri struct vring_rx_desc *d = wil_skb_rxdesc(skb); 366bf0353a6SAhmad Masri int mid = wil_rxdesc_mid(d); 367bf0353a6SAhmad Masri struct wil6210_vif *vif = wil->vifs[mid]; 368bf0353a6SAhmad Masri /* cid from DMA descriptor is limited to 3 bits. 369bf0353a6SAhmad Masri * In case of cid>=8, the value would be cid modulo 8 and we need to 370bf0353a6SAhmad Masri * find real cid by locating the transmitter (ta) inside sta array 371bf0353a6SAhmad Masri */ 372bf0353a6SAhmad Masri int cid = wil_rxdesc_cid(d); 373bf0353a6SAhmad Masri unsigned int snaplen = wil_rx_snaplen(); 374bf0353a6SAhmad Masri struct ieee80211_hdr_3addr *hdr; 375bf0353a6SAhmad Masri int i; 376bf0353a6SAhmad Masri unsigned char *ta; 377bf0353a6SAhmad Masri u8 ftype; 378bf0353a6SAhmad Masri 379bf0353a6SAhmad Masri /* in monitor mode there are no connections */ 380bf0353a6SAhmad Masri if (vif->wdev.iftype == NL80211_IFTYPE_MONITOR) 381bf0353a6SAhmad Masri return cid; 382bf0353a6SAhmad Masri 383bf0353a6SAhmad Masri ftype = wil_rxdesc_ftype(d) << 2; 384bf0353a6SAhmad Masri if (likely(ftype == IEEE80211_FTYPE_DATA)) { 385bf0353a6SAhmad Masri if (unlikely(skb->len < ETH_HLEN + snaplen)) { 386bf0353a6SAhmad Masri wil_err_ratelimited(wil, 387bf0353a6SAhmad Masri "Short data frame, len = %d\n", 388bf0353a6SAhmad Masri skb->len); 389bf0353a6SAhmad Masri return -ENOENT; 390bf0353a6SAhmad Masri } 3916d1ba32cSAhmad Masri ta = wil_skb_get_sa(skb); 392bf0353a6SAhmad Masri } else { 393bf0353a6SAhmad Masri if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) { 394bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Short frame, len = %d\n", 395bf0353a6SAhmad Masri skb->len); 396bf0353a6SAhmad Masri return -ENOENT; 397bf0353a6SAhmad Masri } 398bf0353a6SAhmad Masri hdr = (void *)skb->data; 399bf0353a6SAhmad Masri ta = hdr->addr2; 400bf0353a6SAhmad Masri } 401bf0353a6SAhmad Masri 402ddf7afddSAhmad Masri if (wil->max_assoc_sta <= WIL6210_RX_DESC_MAX_CID) 403bf0353a6SAhmad Masri return cid; 404bf0353a6SAhmad Masri 405bf0353a6SAhmad Masri /* assuming no concurrency between AP interfaces and STA interfaces. 406bf0353a6SAhmad Masri * multista is used only in P2P_GO or AP mode. In other modes return 407bf0353a6SAhmad Masri * cid from the rx descriptor 408bf0353a6SAhmad Masri */ 409bf0353a6SAhmad Masri if (vif->wdev.iftype != NL80211_IFTYPE_P2P_GO && 410bf0353a6SAhmad Masri vif->wdev.iftype != NL80211_IFTYPE_AP) 411bf0353a6SAhmad Masri return cid; 412bf0353a6SAhmad Masri 413bf0353a6SAhmad Masri /* For Rx packets cid from rx descriptor is limited to 3 bits (0..7), 414bf0353a6SAhmad Masri * to find the real cid, compare transmitter address with the stored 415bf0353a6SAhmad Masri * stations mac address in the driver sta array 416bf0353a6SAhmad Masri */ 417ddf7afddSAhmad Masri for (i = cid; i < wil->max_assoc_sta; i += WIL6210_RX_DESC_MAX_CID) { 418bf0353a6SAhmad Masri if (wil->sta[i].status != wil_sta_unused && 419bf0353a6SAhmad Masri ether_addr_equal(wil->sta[i].addr, ta)) { 420bf0353a6SAhmad Masri cid = i; 421bf0353a6SAhmad Masri break; 422bf0353a6SAhmad Masri } 423bf0353a6SAhmad Masri } 424ddf7afddSAhmad Masri if (i >= wil->max_assoc_sta) { 425bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Could not find cid for frame with transmit addr = %pM, iftype = %d, frametype = %d, len = %d\n", 426bf0353a6SAhmad Masri ta, vif->wdev.iftype, ftype, skb->len); 427bf0353a6SAhmad Masri cid = -ENOENT; 428bf0353a6SAhmad Masri } 429bf0353a6SAhmad Masri 430bf0353a6SAhmad Masri return cid; 431bf0353a6SAhmad Masri } 432bf0353a6SAhmad Masri 433e6636d64SLee Jones /* reap 1 frame from @swhead 4342be7d22fSVladimir Kondratiev * 43533e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 43633e61169SVladimir Kondratiev * 4372be7d22fSVladimir Kondratiev * Safe to call from IRQ 4382be7d22fSVladimir Kondratiev */ 4392be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 44010590c6aSGidon Studinski struct wil_ring *vring) 4412be7d22fSVladimir Kondratiev { 4422be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4435bd60982SLior David struct wil6210_vif *vif; 4445bd60982SLior David struct net_device *ndev; 44568ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 44668ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4472be7d22fSVladimir Kondratiev struct sk_buff *skb; 4482be7d22fSVladimir Kondratiev dma_addr_t pa; 449c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 45052a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4517e594444SVladimir Kondratiev u16 dmalen; 4522be7d22fSVladimir Kondratiev u8 ftype; 4535bd60982SLior David int cid, mid; 4543b282bc6SVladimir Kondratiev int i; 455c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 456c8b78b5fSVladimir Kondratiev 457bf0353a6SAhmad Masri BUILD_BUG_ON(sizeof(struct skb_rx_info) > sizeof(skb->cb)); 45833e61169SVladimir Kondratiev 4593b282bc6SVladimir Kondratiev again: 46010590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4612be7d22fSVladimir Kondratiev return NULL; 4622be7d22fSVladimir Kondratiev 4633b282bc6SVladimir Kondratiev i = (int)vring->swhead; 46410590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 46533c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4662be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4672be7d22fSVladimir Kondratiev return NULL; 4682be7d22fSVladimir Kondratiev } 4692be7d22fSVladimir Kondratiev 470148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 471148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 47210590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 473148416a9SVladimir Kondratiev if (!skb) { 474148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4753b282bc6SVladimir Kondratiev goto again; 476148416a9SVladimir Kondratiev } 47768ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 47868ada71eSVladimir Kondratiev *d = *_d; 47968ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 48068ada71eSVladimir Kondratiev 48168ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 48268ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 48368ada71eSVladimir Kondratiev 484148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 485148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 486a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 48768ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 48868ada71eSVladimir Kondratiev 4895bd60982SLior David mid = wil_rxdesc_mid(d); 4905bd60982SLior David vif = wil->vifs[mid]; 4915bd60982SLior David 4925bd60982SLior David if (unlikely(!vif)) { 4935bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4945bd60982SLior David mid); 4955bd60982SLior David kfree_skb(skb); 4965bd60982SLior David goto again; 4975bd60982SLior David } 4985bd60982SLior David ndev = vif_to_ndev(vif); 49933c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 500bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Rx size too large: %d bytes!\n", 501bf0353a6SAhmad Masri dmalen); 502110dea00SWei Yongjun kfree_skb(skb); 5033b282bc6SVladimir Kondratiev goto again; 504e270045bSVladimir Kondratiev } 5057e594444SVladimir Kondratiev skb_trim(skb, dmalen); 50633e61169SVladimir Kondratiev 5071cbbcb08SVladimir Kondratiev prefetch(skb->data); 5081cbbcb08SVladimir Kondratiev 509c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 510c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 511c0d37713SVladimir Kondratiev 512bf0353a6SAhmad Masri cid = wil_rx_get_cid_by_skb(wil, skb); 513bf0353a6SAhmad Masri if (cid == -ENOENT) { 514bf0353a6SAhmad Masri kfree_skb(skb); 515bf0353a6SAhmad Masri goto again; 516bf0353a6SAhmad Masri } 517bf0353a6SAhmad Masri wil_skb_set_cid(skb, (u8)cid); 518bf0353a6SAhmad Masri stats = &wil->sta[cid].stats; 519bf0353a6SAhmad Masri 520c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 521c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 522c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5232be7d22fSVladimir Kondratiev 5242be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5252be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 52633e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5272be7d22fSVladimir Kondratiev 5282be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5292be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5302be7d22fSVladimir Kondratiev return skb; 531a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5322be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5332be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5342be7d22fSVladimir Kondratiev */ 53568ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 53633c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 537a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 538a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 539a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 540a8313341SVladimir Kondratiev 541a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 542a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 543a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5443b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 545a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 546a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 547a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 548a8313341SVladimir Kondratiev mid, cid, tid, seq); 5495bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 550a8313341SVladimir Kondratiev } else { 551a8313341SVladimir Kondratiev /* print again all info. One can enable only this 552a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 553a8313341SVladimir Kondratiev */ 554a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 555a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 556a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 557a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 558a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 559a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 560a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 561a8313341SVladimir Kondratiev } 5622be7d22fSVladimir Kondratiev kfree_skb(skb); 5633b282bc6SVladimir Kondratiev goto again; 5642be7d22fSVladimir Kondratiev } 5652be7d22fSVladimir Kondratiev 566504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 567504937d4SKirshenbaum Erez * and in case of error drop the packet 568504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 569504937d4SKirshenbaum Erez */ 57033c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 571504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 57233c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 573504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5744a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5754a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5764a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5774a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5784a68ab10SVladimir Kondratiev */ 5790b853210SMaya Erez else 5800b853210SMaya Erez stats->rx_csum_err++; 581504937d4SKirshenbaum Erez } 582504937d4SKirshenbaum Erez 583c406ea7cSVladimir Kondratiev if (snaplen) { 584c406ea7cSVladimir Kondratiev /* Packet layout 585c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 586c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 587c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 588c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 589c406ea7cSVladimir Kondratiev */ 590c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 591c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 592c406ea7cSVladimir Kondratiev } 593c406ea7cSVladimir Kondratiev 5942be7d22fSVladimir Kondratiev return skb; 5952be7d22fSVladimir Kondratiev } 5962be7d22fSVladimir Kondratiev 597e6636d64SLee Jones /* allocate and fill up to @count buffers in rx ring 5982be7d22fSVladimir Kondratiev * buffers posted at @swtail 5995bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6005bd60982SLior David * allocate skbs with headroom according to main interface only. This 6015bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6025bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6035bd60982SLior David * and we will need to fix this code once we add support. 6042be7d22fSVladimir Kondratiev */ 6052be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6062be7d22fSVladimir Kondratiev { 607e00243faSLior David struct net_device *ndev = wil->main_ndev; 60810590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6092be7d22fSVladimir Kondratiev u32 next_tail; 6102be7d22fSVladimir Kondratiev int rc = 0; 6112be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6122be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6132be7d22fSVladimir Kondratiev 61410590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6152be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6162be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6172be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 61833c477fdSVladimir Kondratiev if (unlikely(rc)) { 6193d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6202be7d22fSVladimir Kondratiev rc, v->swtail); 6212be7d22fSVladimir Kondratiev break; 6222be7d22fSVladimir Kondratiev } 6232be7d22fSVladimir Kondratiev } 624ab6d7cc3SMaya Erez 625ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 626ab6d7cc3SMaya Erez * committing them to HW 627ab6d7cc3SMaya Erez */ 628ab6d7cc3SMaya Erez wmb(); 629ab6d7cc3SMaya Erez 630b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6312be7d22fSVladimir Kondratiev 6322be7d22fSVladimir Kondratiev return rc; 6332be7d22fSVladimir Kondratiev } 6342be7d22fSVladimir Kondratiev 63558527421SVladimir Kondratiev /** 63658527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 63758527421SVladimir Kondratiev * @cs: One area of memory 63858527421SVladimir Kondratiev * @ct: Another area of memory 63958527421SVladimir Kondratiev * @count: The size of the area. 64058527421SVladimir Kondratiev * 64158527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 64258527421SVladimir Kondratiev * with minimal modifications 64358527421SVladimir Kondratiev */ 6447be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 64558527421SVladimir Kondratiev { 64658527421SVladimir Kondratiev const unsigned char *su1, *su2; 64758527421SVladimir Kondratiev int res = 0; 64858527421SVladimir Kondratiev 64958527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 65058527421SVladimir Kondratiev --su1, --su2, count--) { 65158527421SVladimir Kondratiev res = *su1 - *su2; 65258527421SVladimir Kondratiev if (res) 65358527421SVladimir Kondratiev break; 65458527421SVladimir Kondratiev } 65558527421SVladimir Kondratiev return res; 65658527421SVladimir Kondratiev } 65758527421SVladimir Kondratiev 65858527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 65958527421SVladimir Kondratiev { 66058527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 661bf0353a6SAhmad Masri int cid = wil_skb_get_cid(skb); 66258527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 66358527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 66458527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 66558527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 66658527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 66758527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 66858527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 66958527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 67058527421SVladimir Kondratiev 67158527421SVladimir Kondratiev if (!cc->key_set) { 67258527421SVladimir Kondratiev wil_err_ratelimited(wil, 67358527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 67458527421SVladimir Kondratiev cid, tid, mc, key_id); 67558527421SVladimir Kondratiev return -EINVAL; 67658527421SVladimir Kondratiev } 67758527421SVladimir Kondratiev 67858527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 67958527421SVladimir Kondratiev wil_err_ratelimited(wil, 68058527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 68158527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 68258527421SVladimir Kondratiev return -EINVAL; 68358527421SVladimir Kondratiev } 68458527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 68558527421SVladimir Kondratiev 68658527421SVladimir Kondratiev return 0; 68758527421SVladimir Kondratiev } 68858527421SVladimir Kondratiev 689e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 690e15af41cSDedy Lansky struct wil_net_stats *stats) 691e15af41cSDedy Lansky { 692e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 693e15af41cSDedy Lansky 694e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 695e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 696e15af41cSDedy Lansky stats->rx_mic_error++; 697e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 698e15af41cSDedy Lansky return -EFAULT; 699e15af41cSDedy Lansky } 700e15af41cSDedy Lansky 701e15af41cSDedy Lansky return 0; 702e15af41cSDedy Lansky } 703e15af41cSDedy Lansky 7047be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 7057be13fc3SGidon Studinski int *security) 7067be13fc3SGidon Studinski { 7077be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 7087be13fc3SGidon Studinski 709bf0353a6SAhmad Masri *cid = wil_skb_get_cid(skb); 7107be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 7117be13fc3SGidon Studinski } 7127be13fc3SGidon Studinski 7132be7d22fSVladimir Kondratiev /* 71442fe1e51SAhmad Masri * Check if skb is ptk eapol key message 71542fe1e51SAhmad Masri * 71642fe1e51SAhmad Masri * returns a pointer to the start of the eapol key structure, NULL 71742fe1e51SAhmad Masri * if frame is not PTK eapol key 71842fe1e51SAhmad Masri */ 71942fe1e51SAhmad Masri static struct wil_eapol_key *wil_is_ptk_eapol_key(struct wil6210_priv *wil, 72042fe1e51SAhmad Masri struct sk_buff *skb) 72142fe1e51SAhmad Masri { 72242fe1e51SAhmad Masri u8 *buf; 72342fe1e51SAhmad Masri const struct wil_1x_hdr *hdr; 72442fe1e51SAhmad Masri struct wil_eapol_key *key; 72542fe1e51SAhmad Masri u16 key_info; 72642fe1e51SAhmad Masri int len = skb->len; 72742fe1e51SAhmad Masri 72842fe1e51SAhmad Masri if (!skb_mac_header_was_set(skb)) { 72942fe1e51SAhmad Masri wil_err(wil, "mac header was not set\n"); 73042fe1e51SAhmad Masri return NULL; 73142fe1e51SAhmad Masri } 73242fe1e51SAhmad Masri 73342fe1e51SAhmad Masri len -= skb_mac_offset(skb); 73442fe1e51SAhmad Masri 73542fe1e51SAhmad Masri if (len < sizeof(struct ethhdr) + sizeof(struct wil_1x_hdr) + 73642fe1e51SAhmad Masri sizeof(struct wil_eapol_key)) 73742fe1e51SAhmad Masri return NULL; 73842fe1e51SAhmad Masri 73942fe1e51SAhmad Masri buf = skb_mac_header(skb) + sizeof(struct ethhdr); 74042fe1e51SAhmad Masri 74142fe1e51SAhmad Masri hdr = (const struct wil_1x_hdr *)buf; 74242fe1e51SAhmad Masri if (hdr->type != WIL_1X_TYPE_EAPOL_KEY) 74342fe1e51SAhmad Masri return NULL; 74442fe1e51SAhmad Masri 74542fe1e51SAhmad Masri key = (struct wil_eapol_key *)(buf + sizeof(struct wil_1x_hdr)); 74642fe1e51SAhmad Masri if (key->type != WIL_EAPOL_KEY_TYPE_WPA && 74742fe1e51SAhmad Masri key->type != WIL_EAPOL_KEY_TYPE_RSN) 74842fe1e51SAhmad Masri return NULL; 74942fe1e51SAhmad Masri 75042fe1e51SAhmad Masri key_info = be16_to_cpu(key->key_info); 75142fe1e51SAhmad Masri if (!(key_info & WIL_KEY_INFO_KEY_TYPE)) /* check if pairwise */ 75242fe1e51SAhmad Masri return NULL; 75342fe1e51SAhmad Masri 75442fe1e51SAhmad Masri return key; 75542fe1e51SAhmad Masri } 75642fe1e51SAhmad Masri 75742fe1e51SAhmad Masri static bool wil_skb_is_eap_3(struct wil6210_priv *wil, struct sk_buff *skb) 75842fe1e51SAhmad Masri { 75942fe1e51SAhmad Masri struct wil_eapol_key *key; 76042fe1e51SAhmad Masri u16 key_info; 76142fe1e51SAhmad Masri 76242fe1e51SAhmad Masri key = wil_is_ptk_eapol_key(wil, skb); 76342fe1e51SAhmad Masri if (!key) 76442fe1e51SAhmad Masri return false; 76542fe1e51SAhmad Masri 76642fe1e51SAhmad Masri key_info = be16_to_cpu(key->key_info); 76742fe1e51SAhmad Masri if (key_info & (WIL_KEY_INFO_MIC | 76842fe1e51SAhmad Masri WIL_KEY_INFO_ENCR_KEY_DATA)) { 76942fe1e51SAhmad Masri /* 3/4 of 4-Way Handshake */ 77042fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 3\n"); 77142fe1e51SAhmad Masri return true; 77242fe1e51SAhmad Masri } 77342fe1e51SAhmad Masri /* 1/4 of 4-Way Handshake */ 77442fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 1\n"); 77542fe1e51SAhmad Masri 77642fe1e51SAhmad Masri return false; 77742fe1e51SAhmad Masri } 77842fe1e51SAhmad Masri 77942fe1e51SAhmad Masri static bool wil_skb_is_eap_4(struct wil6210_priv *wil, struct sk_buff *skb) 78042fe1e51SAhmad Masri { 78142fe1e51SAhmad Masri struct wil_eapol_key *key; 78242fe1e51SAhmad Masri u32 *nonce, i; 78342fe1e51SAhmad Masri 78442fe1e51SAhmad Masri key = wil_is_ptk_eapol_key(wil, skb); 78542fe1e51SAhmad Masri if (!key) 78642fe1e51SAhmad Masri return false; 78742fe1e51SAhmad Masri 78842fe1e51SAhmad Masri nonce = (u32 *)key->key_nonce; 78942fe1e51SAhmad Masri for (i = 0; i < WIL_EAP_NONCE_LEN / sizeof(u32); i++, nonce++) { 79042fe1e51SAhmad Masri if (*nonce != 0) { 79142fe1e51SAhmad Masri /* message 2/4 */ 79242fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 2\n"); 79342fe1e51SAhmad Masri return false; 79442fe1e51SAhmad Masri } 79542fe1e51SAhmad Masri } 79642fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 4\n"); 79742fe1e51SAhmad Masri 79842fe1e51SAhmad Masri return true; 79942fe1e51SAhmad Masri } 80042fe1e51SAhmad Masri 80142fe1e51SAhmad Masri void wil_enable_tx_key_worker(struct work_struct *work) 80242fe1e51SAhmad Masri { 80342fe1e51SAhmad Masri struct wil6210_vif *vif = container_of(work, 80442fe1e51SAhmad Masri struct wil6210_vif, enable_tx_key_worker); 80542fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 80642fe1e51SAhmad Masri int rc, cid; 80742fe1e51SAhmad Masri 80842fe1e51SAhmad Masri rtnl_lock(); 80942fe1e51SAhmad Masri if (vif->ptk_rekey_state != WIL_REKEY_WAIT_M4_SENT) { 81042fe1e51SAhmad Masri wil_dbg_misc(wil, "Invalid rekey state = %d\n", 81142fe1e51SAhmad Masri vif->ptk_rekey_state); 81242fe1e51SAhmad Masri rtnl_unlock(); 81342fe1e51SAhmad Masri return; 81442fe1e51SAhmad Masri } 81542fe1e51SAhmad Masri 81642fe1e51SAhmad Masri cid = wil_find_cid_by_idx(wil, vif->mid, 0); 81742fe1e51SAhmad Masri if (!wil_cid_valid(wil, cid)) { 81842fe1e51SAhmad Masri wil_err(wil, "Invalid cid = %d\n", cid); 81942fe1e51SAhmad Masri rtnl_unlock(); 82042fe1e51SAhmad Masri return; 82142fe1e51SAhmad Masri } 82242fe1e51SAhmad Masri 82342fe1e51SAhmad Masri wil_dbg_misc(wil, "Apply PTK key after eapol was sent out\n"); 82442fe1e51SAhmad Masri rc = wmi_add_cipher_key(vif, 0, wil->sta[cid].addr, 0, NULL, 82542fe1e51SAhmad Masri WMI_KEY_USE_APPLY_PTK); 82642fe1e51SAhmad Masri 82742fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_IDLE; 82842fe1e51SAhmad Masri rtnl_unlock(); 82942fe1e51SAhmad Masri 83042fe1e51SAhmad Masri if (rc) 83142fe1e51SAhmad Masri wil_err(wil, "Apply PTK key failed %d\n", rc); 83242fe1e51SAhmad Masri } 83342fe1e51SAhmad Masri 83442fe1e51SAhmad Masri void wil_tx_complete_handle_eapol(struct wil6210_vif *vif, struct sk_buff *skb) 83542fe1e51SAhmad Masri { 83642fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 83742fe1e51SAhmad Masri struct wireless_dev *wdev = vif_to_wdev(vif); 83842fe1e51SAhmad Masri bool q = false; 83942fe1e51SAhmad Masri 84042fe1e51SAhmad Masri if (wdev->iftype != NL80211_IFTYPE_STATION || 84142fe1e51SAhmad Masri !test_bit(WMI_FW_CAPABILITY_SPLIT_REKEY, wil->fw_capabilities)) 84242fe1e51SAhmad Masri return; 84342fe1e51SAhmad Masri 84442fe1e51SAhmad Masri /* check if skb is an EAP message 4/4 */ 84542fe1e51SAhmad Masri if (!wil_skb_is_eap_4(wil, skb)) 84642fe1e51SAhmad Masri return; 84742fe1e51SAhmad Masri 84842fe1e51SAhmad Masri spin_lock_bh(&wil->eap_lock); 84942fe1e51SAhmad Masri switch (vif->ptk_rekey_state) { 85042fe1e51SAhmad Masri case WIL_REKEY_IDLE: 85142fe1e51SAhmad Masri /* ignore idle state, can happen due to M4 retransmission */ 85242fe1e51SAhmad Masri break; 85342fe1e51SAhmad Masri case WIL_REKEY_M3_RECEIVED: 85442fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_IDLE; 85542fe1e51SAhmad Masri break; 85642fe1e51SAhmad Masri case WIL_REKEY_WAIT_M4_SENT: 85742fe1e51SAhmad Masri q = true; 85842fe1e51SAhmad Masri break; 85942fe1e51SAhmad Masri default: 86042fe1e51SAhmad Masri wil_err(wil, "Unknown rekey state = %d", 86142fe1e51SAhmad Masri vif->ptk_rekey_state); 86242fe1e51SAhmad Masri } 86342fe1e51SAhmad Masri spin_unlock_bh(&wil->eap_lock); 86442fe1e51SAhmad Masri 86542fe1e51SAhmad Masri if (q) { 86642fe1e51SAhmad Masri q = queue_work(wil->wmi_wq, &vif->enable_tx_key_worker); 86742fe1e51SAhmad Masri wil_dbg_misc(wil, "queue_work of enable_tx_key_worker -> %d\n", 86842fe1e51SAhmad Masri q); 86942fe1e51SAhmad Masri } 87042fe1e51SAhmad Masri } 87142fe1e51SAhmad Masri 87242fe1e51SAhmad Masri static void wil_rx_handle_eapol(struct wil6210_vif *vif, struct sk_buff *skb) 87342fe1e51SAhmad Masri { 87442fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 87542fe1e51SAhmad Masri struct wireless_dev *wdev = vif_to_wdev(vif); 87642fe1e51SAhmad Masri 87742fe1e51SAhmad Masri if (wdev->iftype != NL80211_IFTYPE_STATION || 87842fe1e51SAhmad Masri !test_bit(WMI_FW_CAPABILITY_SPLIT_REKEY, wil->fw_capabilities)) 87942fe1e51SAhmad Masri return; 88042fe1e51SAhmad Masri 88142fe1e51SAhmad Masri /* check if skb is a EAP message 3/4 */ 88242fe1e51SAhmad Masri if (!wil_skb_is_eap_3(wil, skb)) 88342fe1e51SAhmad Masri return; 88442fe1e51SAhmad Masri 88542fe1e51SAhmad Masri if (vif->ptk_rekey_state == WIL_REKEY_IDLE) 88642fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_M3_RECEIVED; 88742fe1e51SAhmad Masri } 88842fe1e51SAhmad Masri 88942fe1e51SAhmad Masri /* 8902be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 891e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 8922be7d22fSVladimir Kondratiev */ 893f99fe49fSDedy Lansky void wil_netif_rx(struct sk_buff *skb, struct net_device *ndev, int cid, 894f99fe49fSDedy Lansky struct wil_net_stats *stats, bool gro) 8952be7d22fSVladimir Kondratiev { 896e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 897c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 898e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 8992be7d22fSVladimir Kondratiev unsigned int len = skb->len; 9006d1ba32cSAhmad Masri u8 *sa, *da = wil_skb_get_da(skb); 901c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 902c42da999SVladimir Kondratiev * is not suitable, need to look at data 903c42da999SVladimir Kondratiev */ 9046d1ba32cSAhmad Masri int mcast = is_multicast_ether_addr(da); 905c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 9062be7d22fSVladimir Kondratiev 9079a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 9086d1ba32cSAhmad Masri sa = wil_skb_get_sa(skb); 9096d1ba32cSAhmad Masri if (mcast && ether_addr_equal(sa, ndev->dev_addr)) { 9109a65064aSDedy Lansky /* mcast packet looped back to us */ 9119a65064aSDedy Lansky dev_kfree_skb(skb); 912045790b7SJason A. Donenfeld ndev->stats.rx_dropped++; 913045790b7SJason A. Donenfeld stats->rx_dropped++; 914045790b7SJason A. Donenfeld wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 915045790b7SJason A. Donenfeld return; 9169a65064aSDedy Lansky } 9179a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 918c42da999SVladimir Kondratiev if (mcast) { 919c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 920c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 921c42da999SVladimir Kondratiev */ 922c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 923c42da999SVladimir Kondratiev } else { 9246d1ba32cSAhmad Masri int xmit_cid = wil_find_cid(wil, vif->mid, da); 9252be7d22fSVladimir Kondratiev 926c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 927c42da999SVladimir Kondratiev /* The destination station is associated to 928c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 929c42da999SVladimir Kondratiev * directly to it and do not pass it to local 930c42da999SVladimir Kondratiev * net stack. 931c42da999SVladimir Kondratiev */ 932c42da999SVladimir Kondratiev xmit_skb = skb; 933c42da999SVladimir Kondratiev skb = NULL; 934c42da999SVladimir Kondratiev } 935c42da999SVladimir Kondratiev } 936c42da999SVladimir Kondratiev } 937c42da999SVladimir Kondratiev if (xmit_skb) { 938c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 939c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 940c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 941c42da999SVladimir Kondratiev */ 942c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 943c42da999SVladimir Kondratiev xmit_skb->priority += 256; 944c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 945c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 946c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 947c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 948c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 949c42da999SVladimir Kondratiev } 950c42da999SVladimir Kondratiev 951c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 952c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 9535bd60982SLior David skb->dev = ndev; 95442fe1e51SAhmad Masri 95542fe1e51SAhmad Masri if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 95642fe1e51SAhmad Masri wil_rx_handle_eapol(vif, skb); 95742fe1e51SAhmad Masri 958f99fe49fSDedy Lansky if (gro) 959045790b7SJason A. Donenfeld napi_gro_receive(&wil->napi_rx, skb); 960f99fe49fSDedy Lansky else 961f99fe49fSDedy Lansky netif_rx_ni(skb); 962c42da999SVladimir Kondratiev } 9632be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 964c8b78b5fSVladimir Kondratiev stats->rx_packets++; 9652be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 966c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 967c42da999SVladimir Kondratiev if (mcast) 968c42da999SVladimir Kondratiev ndev->stats.multicast++; 969194b482bSVladimir Kondratiev } 9702be7d22fSVladimir Kondratiev 971f99fe49fSDedy Lansky void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 972f99fe49fSDedy Lansky { 973f99fe49fSDedy Lansky int cid, security; 974f99fe49fSDedy Lansky struct wil6210_priv *wil = ndev_to_wil(ndev); 975f99fe49fSDedy Lansky struct wil_net_stats *stats; 976f99fe49fSDedy Lansky 977f99fe49fSDedy Lansky wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 978f99fe49fSDedy Lansky 979f99fe49fSDedy Lansky stats = &wil->sta[cid].stats; 980f99fe49fSDedy Lansky 981f99fe49fSDedy Lansky skb_orphan(skb); 982f99fe49fSDedy Lansky 983f99fe49fSDedy Lansky if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 9842b481835SDan Carpenter wil_dbg_txrx(wil, "Rx drop %d bytes\n", skb->len); 985f99fe49fSDedy Lansky dev_kfree_skb(skb); 986f99fe49fSDedy Lansky ndev->stats.rx_dropped++; 987f99fe49fSDedy Lansky stats->rx_replay++; 988f99fe49fSDedy Lansky stats->rx_dropped++; 989f99fe49fSDedy Lansky return; 990f99fe49fSDedy Lansky } 991f99fe49fSDedy Lansky 992f99fe49fSDedy Lansky /* check errors reported by HW and update statistics */ 993f99fe49fSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 994f99fe49fSDedy Lansky dev_kfree_skb(skb); 995f99fe49fSDedy Lansky return; 996f99fe49fSDedy Lansky } 997f99fe49fSDedy Lansky 998f99fe49fSDedy Lansky wil_netif_rx(skb, ndev, cid, stats, true); 999f99fe49fSDedy Lansky } 1000f99fe49fSDedy Lansky 1001e6636d64SLee Jones /* Proceed all completed skb's from Rx VRING 10022be7d22fSVladimir Kondratiev * 1003e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 10042be7d22fSVladimir Kondratiev */ 1005e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 10062be7d22fSVladimir Kondratiev { 1007e00243faSLior David struct net_device *ndev = wil->main_ndev; 1008e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 100910590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 10102be7d22fSVladimir Kondratiev struct sk_buff *skb; 10112be7d22fSVladimir Kondratiev 101233c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 10132be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 10142be7d22fSVladimir Kondratiev return; 10152be7d22fSVladimir Kondratiev } 1016af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 1017e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 1018e0287c4aSVladimir Kondratiev (*quota)--; 10192be7d22fSVladimir Kondratiev 1020e00243faSLior David /* monitor is currently supported on main interface only */ 1021e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 10222be7d22fSVladimir Kondratiev skb->dev = ndev; 10232be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 10242be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 10252be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 10262be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 1027b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 10282be7d22fSVladimir Kondratiev } else { 1029b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 10302be7d22fSVladimir Kondratiev } 10312be7d22fSVladimir Kondratiev } 10322be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 10332be7d22fSVladimir Kondratiev } 10342be7d22fSVladimir Kondratiev 103552a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 103652a45702SLior David { 103752a45702SLior David wil->rx_buf_len = rx_large_buf ? 103852a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 103952a45702SLior David if (mtu_max > wil->rx_buf_len) { 104052a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 104152a45702SLior David * backward compatibility (mtu_max parameter was also used 104252a45702SLior David * to support receiving large packets) 104352a45702SLior David */ 104452a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 104552a45702SLior David wil->rx_buf_len = mtu_max; 104652a45702SLior David } 104752a45702SLior David } 104852a45702SLior David 104961e5ec04SDedy Lansky static int wil_rx_init(struct wil6210_priv *wil, uint order) 10502be7d22fSVladimir Kondratiev { 105110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 10522be7d22fSVladimir Kondratiev int rc; 10532be7d22fSVladimir Kondratiev 1054af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 10559cf10d62SVladimir Kondratiev 10568bf6adb9SVladimir Kondratiev if (vring->va) { 10578bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 10588bf6adb9SVladimir Kondratiev return -EINVAL; 10598bf6adb9SVladimir Kondratiev } 10608bf6adb9SVladimir Kondratiev 106152a45702SLior David wil_rx_buf_len_init(wil); 106252a45702SLior David 106361e5ec04SDedy Lansky vring->size = 1 << order; 106496c93589SGidon Studinski vring->is_rx = true; 10652be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 10662be7d22fSVladimir Kondratiev if (rc) 10672be7d22fSVladimir Kondratiev return rc; 10682be7d22fSVladimir Kondratiev 106947e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 10702be7d22fSVladimir Kondratiev if (rc) 10712be7d22fSVladimir Kondratiev goto err_free; 10722be7d22fSVladimir Kondratiev 10732be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 10742be7d22fSVladimir Kondratiev if (rc) 10752be7d22fSVladimir Kondratiev goto err_free; 10762be7d22fSVladimir Kondratiev 10772be7d22fSVladimir Kondratiev return 0; 10782be7d22fSVladimir Kondratiev err_free: 107996c93589SGidon Studinski wil_vring_free(wil, vring); 10802be7d22fSVladimir Kondratiev 10812be7d22fSVladimir Kondratiev return rc; 10822be7d22fSVladimir Kondratiev } 10832be7d22fSVladimir Kondratiev 108496c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 10852be7d22fSVladimir Kondratiev { 108610590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 10872be7d22fSVladimir Kondratiev 1088af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 10899cf10d62SVladimir Kondratiev 10902acb4220SVladimir Kondratiev if (vring->va) 109196c93589SGidon Studinski wil_vring_free(wil, vring); 10922be7d22fSVladimir Kondratiev } 10932be7d22fSVladimir Kondratiev 10949202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 10959202d7b6SMaya Erez u32 len, int vring_index) 10969202d7b6SMaya Erez { 10979202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 10989202d7b6SMaya Erez 10999202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 11009202d7b6SMaya Erez d->dma.ip_length = 0; 11019202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 11029202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 11039202d7b6SMaya Erez d->dma.error = 0; 11049202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11059202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 11069202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 11079202d7b6SMaya Erez d->mac.d[0] = 0; 11089202d7b6SMaya Erez d->mac.d[1] = 0; 11099202d7b6SMaya Erez d->mac.d[2] = 0; 11109202d7b6SMaya Erez d->mac.ucode_cmd = 0; 11119202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 11129202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 11139202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 11149202d7b6SMaya Erez 11159202d7b6SMaya Erez return 0; 11169202d7b6SMaya Erez } 11179202d7b6SMaya Erez 111896c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 1119875e9439SMaya Erez { 1120875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1121f89ee992Szhengbin txdata->dot1x_open = false; 1122875e9439SMaya Erez txdata->enabled = 0; 1123875e9439SMaya Erez txdata->idle = 0; 1124875e9439SMaya Erez txdata->last_idle = 0; 1125875e9439SMaya Erez txdata->begin = 0; 1126875e9439SMaya Erez txdata->agg_wsize = 0; 1127875e9439SMaya Erez txdata->agg_timeout = 0; 1128875e9439SMaya Erez txdata->agg_amsdu = 0; 1129875e9439SMaya Erez txdata->addba_in_progress = false; 1130e00243faSLior David txdata->mid = U8_MAX; 1131875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 1132875e9439SMaya Erez } 1133875e9439SMaya Erez 113496c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 11352be7d22fSVladimir Kondratiev int cid, int tid) 11362be7d22fSVladimir Kondratiev { 1137e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 11382be7d22fSVladimir Kondratiev int rc; 11392be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 11402be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 11412be7d22fSVladimir Kondratiev .vring_cfg = { 11422be7d22fSVladimir Kondratiev .tx_sw_ring = { 11439a06bec9SVladimir Kondratiev .max_mpdu_size = 1144c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1145b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 11462be7d22fSVladimir Kondratiev }, 11472be7d22fSVladimir Kondratiev .ringid = id, 11482be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 11492be7d22fSVladimir Kondratiev .mac_ctrl = 0, 11502be7d22fSVladimir Kondratiev .to_resolution = 0, 11513277213fSVladimir Kondratiev .agg_max_wsize = 0, 11522be7d22fSVladimir Kondratiev .schd_params = { 11532be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 11542be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 11552be7d22fSVladimir Kondratiev }, 11562be7d22fSVladimir Kondratiev }, 11572be7d22fSVladimir Kondratiev }; 11582be7d22fSVladimir Kondratiev struct { 1159b874ddecSLior David struct wmi_cmd_hdr wmi; 11602be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1161807b0860SAlexei Avshalom Lazar } __packed reply = { 1162807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1163807b0860SAlexei Avshalom Lazar }; 116410590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 116510590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 11662be7d22fSVladimir Kondratiev 1167bf0353a6SAhmad Masri if (cid >= WIL6210_RX_DESC_MAX_CID) { 1168bf0353a6SAhmad Masri cmd.vring_cfg.cidxtid = CIDXTID_EXTENDED_CID_TID; 1169bf0353a6SAhmad Masri cmd.vring_cfg.cid = cid; 1170bf0353a6SAhmad Masri cmd.vring_cfg.tid = tid; 1171bf0353a6SAhmad Masri } else { 1172bf0353a6SAhmad Masri cmd.vring_cfg.cidxtid = mk_cidxtid(cid, tid); 1173bf0353a6SAhmad Masri } 1174bf0353a6SAhmad Masri 1175af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 1176e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 11779b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 11789cf10d62SVladimir Kondratiev 11792be7d22fSVladimir Kondratiev if (vring->va) { 11802be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 11812be7d22fSVladimir Kondratiev rc = -EINVAL; 11822be7d22fSVladimir Kondratiev goto out; 11832be7d22fSVladimir Kondratiev } 11842be7d22fSVladimir Kondratiev 1185875e9439SMaya Erez wil_tx_data_init(txdata); 118696c93589SGidon Studinski vring->is_rx = false; 11872be7d22fSVladimir Kondratiev vring->size = size; 11882be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 11892be7d22fSVladimir Kondratiev if (rc) 11902be7d22fSVladimir Kondratiev goto out; 11912be7d22fSVladimir Kondratiev 119210590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 119310590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 119493ae6d49SVladimir Kondratiev 11952be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 11962be7d22fSVladimir Kondratiev 1197e00243faSLior David if (!vif->privacy) 1198230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1199e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 12002a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 12012a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 12022be7d22fSVladimir Kondratiev if (rc) 12032be7d22fSVladimir Kondratiev goto out_free; 12042be7d22fSVladimir Kondratiev 1205b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 12062be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 12072be7d22fSVladimir Kondratiev reply.cmd.status); 1208c331997bSVladimir Kondratiev rc = -EINVAL; 12092be7d22fSVladimir Kondratiev goto out_free; 12102be7d22fSVladimir Kondratiev } 12112be7d22fSVladimir Kondratiev 1212dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1213dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1214e00243faSLior David txdata->mid = vif->mid; 1215097638a0SVladimir Kondratiev txdata->enabled = 1; 1216dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1217dc90506fSMaya Erez 1218230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 12193a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1220097638a0SVladimir Kondratiev 12212be7d22fSVladimir Kondratiev return 0; 12222be7d22fSVladimir Kondratiev out_free: 1223875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1224230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1225230d8442SVladimir Kondratiev txdata->enabled = 0; 1226875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 122796c93589SGidon Studinski wil_vring_free(wil, vring); 1228ddf7afddSAhmad Masri wil->ring2cid_tid[id][0] = wil->max_assoc_sta; 122910590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 12300916d9f2SMaya Erez 12312be7d22fSVladimir Kondratiev out: 12322be7d22fSVladimir Kondratiev 12332be7d22fSVladimir Kondratiev return rc; 12342be7d22fSVladimir Kondratiev } 12352be7d22fSVladimir Kondratiev 1236b9010f10SAhmad Masri static int wil_tx_vring_modify(struct wil6210_vif *vif, int ring_id, int cid, 1237b9010f10SAhmad Masri int tid) 1238b9010f10SAhmad Masri { 1239b9010f10SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 1240b9010f10SAhmad Masri int rc; 1241b9010f10SAhmad Masri struct wmi_vring_cfg_cmd cmd = { 1242b9010f10SAhmad Masri .action = cpu_to_le32(WMI_VRING_CMD_MODIFY), 1243b9010f10SAhmad Masri .vring_cfg = { 1244b9010f10SAhmad Masri .tx_sw_ring = { 1245b9010f10SAhmad Masri .max_mpdu_size = 1246b9010f10SAhmad Masri cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1247b9010f10SAhmad Masri .ring_size = 0, 1248b9010f10SAhmad Masri }, 1249b9010f10SAhmad Masri .ringid = ring_id, 1250b9010f10SAhmad Masri .cidxtid = mk_cidxtid(cid, tid), 1251b9010f10SAhmad Masri .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 1252b9010f10SAhmad Masri .mac_ctrl = 0, 1253b9010f10SAhmad Masri .to_resolution = 0, 1254b9010f10SAhmad Masri .agg_max_wsize = 0, 1255b9010f10SAhmad Masri .schd_params = { 1256b9010f10SAhmad Masri .priority = cpu_to_le16(0), 1257b9010f10SAhmad Masri .timeslot_us = cpu_to_le16(0xfff), 1258b9010f10SAhmad Masri }, 1259b9010f10SAhmad Masri }, 1260b9010f10SAhmad Masri }; 1261b9010f10SAhmad Masri struct { 1262b9010f10SAhmad Masri struct wmi_cmd_hdr wmi; 1263b9010f10SAhmad Masri struct wmi_vring_cfg_done_event cmd; 1264b9010f10SAhmad Masri } __packed reply = { 1265b9010f10SAhmad Masri .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1266b9010f10SAhmad Masri }; 1267b9010f10SAhmad Masri struct wil_ring *vring = &wil->ring_tx[ring_id]; 1268b9010f10SAhmad Masri struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; 1269b9010f10SAhmad Masri 1270b9010f10SAhmad Masri wil_dbg_misc(wil, "vring_modify: ring %d cid %d tid %d\n", ring_id, 1271b9010f10SAhmad Masri cid, tid); 1272b9010f10SAhmad Masri lockdep_assert_held(&wil->mutex); 1273b9010f10SAhmad Masri 1274b9010f10SAhmad Masri if (!vring->va) { 1275b9010f10SAhmad Masri wil_err(wil, "Tx ring [%d] not allocated\n", ring_id); 1276b9010f10SAhmad Masri return -EINVAL; 1277b9010f10SAhmad Masri } 1278b9010f10SAhmad Masri 1279b9010f10SAhmad Masri if (wil->ring2cid_tid[ring_id][0] != cid || 1280b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] != tid) { 1281b9010f10SAhmad Masri wil_err(wil, "ring info does not match cid=%u tid=%u\n", 1282b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0], 1283b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1]); 1284b9010f10SAhmad Masri } 1285b9010f10SAhmad Masri 1286b9010f10SAhmad Masri cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 1287b9010f10SAhmad Masri 1288b9010f10SAhmad Masri rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 12892a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 12902a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 1291b9010f10SAhmad Masri if (rc) 1292b9010f10SAhmad Masri goto fail; 1293b9010f10SAhmad Masri 1294b9010f10SAhmad Masri if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 1295b9010f10SAhmad Masri wil_err(wil, "Tx modify failed, status 0x%02x\n", 1296b9010f10SAhmad Masri reply.cmd.status); 1297b9010f10SAhmad Masri rc = -EINVAL; 1298b9010f10SAhmad Masri goto fail; 1299b9010f10SAhmad Masri } 1300b9010f10SAhmad Masri 1301b9010f10SAhmad Masri /* set BA aggregation window size to 0 to force a new BA with the 1302b9010f10SAhmad Masri * new AP 1303b9010f10SAhmad Masri */ 1304b9010f10SAhmad Masri txdata->agg_wsize = 0; 1305b9010f10SAhmad Masri if (txdata->dot1x_open && agg_wsize >= 0) 1306b9010f10SAhmad Masri wil_addba_tx_request(wil, ring_id, agg_wsize); 1307b9010f10SAhmad Masri 1308b9010f10SAhmad Masri return 0; 1309b9010f10SAhmad Masri fail: 1310b9010f10SAhmad Masri spin_lock_bh(&txdata->lock); 1311b9010f10SAhmad Masri txdata->dot1x_open = false; 1312b9010f10SAhmad Masri txdata->enabled = 0; 1313b9010f10SAhmad Masri spin_unlock_bh(&txdata->lock); 1314ddf7afddSAhmad Masri wil->ring2cid_tid[ring_id][0] = wil->max_assoc_sta; 1315b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] = 0; 1316b9010f10SAhmad Masri return rc; 1317b9010f10SAhmad Masri } 1318b9010f10SAhmad Masri 1319e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 132041d6b093SVladimir Kondratiev { 1321e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 132241d6b093SVladimir Kondratiev int rc; 132341d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 132441d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 132541d6b093SVladimir Kondratiev .vring_cfg = { 132641d6b093SVladimir Kondratiev .tx_sw_ring = { 132741d6b093SVladimir Kondratiev .max_mpdu_size = 132841d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 132941d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 133041d6b093SVladimir Kondratiev }, 133141d6b093SVladimir Kondratiev .ringid = id, 133241d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 133341d6b093SVladimir Kondratiev }, 133441d6b093SVladimir Kondratiev }; 133541d6b093SVladimir Kondratiev struct { 1336b874ddecSLior David struct wmi_cmd_hdr wmi; 133741d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1338807b0860SAlexei Avshalom Lazar } __packed reply = { 1339807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1340807b0860SAlexei Avshalom Lazar }; 134110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 134210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 134341d6b093SVladimir Kondratiev 1344af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 134541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 13469b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 134741d6b093SVladimir Kondratiev 134841d6b093SVladimir Kondratiev if (vring->va) { 134941d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 135041d6b093SVladimir Kondratiev rc = -EINVAL; 135141d6b093SVladimir Kondratiev goto out; 135241d6b093SVladimir Kondratiev } 135341d6b093SVladimir Kondratiev 1354875e9439SMaya Erez wil_tx_data_init(txdata); 135596c93589SGidon Studinski vring->is_rx = false; 135641d6b093SVladimir Kondratiev vring->size = size; 135741d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 135841d6b093SVladimir Kondratiev if (rc) 135941d6b093SVladimir Kondratiev goto out; 136041d6b093SVladimir Kondratiev 1361ddf7afddSAhmad Masri wil->ring2cid_tid[id][0] = wil->max_assoc_sta; /* CID */ 136210590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 136341d6b093SVladimir Kondratiev 136441d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 136541d6b093SVladimir Kondratiev 1366e00243faSLior David if (!vif->privacy) 1367230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1368e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1369e00243faSLior David &cmd, sizeof(cmd), 13702a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 13712a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 137241d6b093SVladimir Kondratiev if (rc) 137341d6b093SVladimir Kondratiev goto out_free; 137441d6b093SVladimir Kondratiev 137541d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 137641d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 137741d6b093SVladimir Kondratiev reply.cmd.status); 137841d6b093SVladimir Kondratiev rc = -EINVAL; 137941d6b093SVladimir Kondratiev goto out_free; 138041d6b093SVladimir Kondratiev } 138141d6b093SVladimir Kondratiev 1382dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1383dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1384e00243faSLior David txdata->mid = vif->mid; 138541d6b093SVladimir Kondratiev txdata->enabled = 1; 1386dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 138741d6b093SVladimir Kondratiev 138841d6b093SVladimir Kondratiev return 0; 138941d6b093SVladimir Kondratiev out_free: 1390875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1391230d8442SVladimir Kondratiev txdata->enabled = 0; 1392230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1393875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 139496c93589SGidon Studinski wil_vring_free(wil, vring); 139541d6b093SVladimir Kondratiev out: 139641d6b093SVladimir Kondratiev 139741d6b093SVladimir Kondratiev return rc; 139841d6b093SVladimir Kondratiev } 139941d6b093SVladimir Kondratiev 140010590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1401e00243faSLior David struct wil6210_vif *vif, 14022be7d22fSVladimir Kondratiev struct sk_buff *skb) 14032be7d22fSVladimir Kondratiev { 14046d1ba32cSAhmad Masri int i, cid; 14056d1ba32cSAhmad Masri const u8 *da = wil_skb_get_da(skb); 140696c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 14072be7d22fSVladimir Kondratiev 14086d1ba32cSAhmad Masri cid = wil_find_cid(wil, vif->mid, da); 14096d1ba32cSAhmad Masri 1410ddf7afddSAhmad Masri if (cid < 0 || cid >= wil->max_assoc_sta) 14113df2cd36SVladimir Kondratiev return NULL; 14123df2cd36SVladimir Kondratiev 14133df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 141496c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 141510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 141610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1417230d8442SVladimir Kondratiev continue; 141810590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 141910590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 142010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 14218fe59627SVladimir Kondratiev 1422af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 14236d1ba32cSAhmad Masri da, i); 1424b729aaf0SMaya Erez if (v->va && txdata->enabled) { 14252be7d22fSVladimir Kondratiev return v; 14263df2cd36SVladimir Kondratiev } else { 1427af3db60aSLazar Alexei wil_dbg_txrx(wil, 1428af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1429af3db60aSLazar Alexei i); 14303df2cd36SVladimir Kondratiev return NULL; 14313df2cd36SVladimir Kondratiev } 14323df2cd36SVladimir Kondratiev } 14333df2cd36SVladimir Kondratiev } 14342be7d22fSVladimir Kondratiev 14352be7d22fSVladimir Kondratiev return NULL; 14362be7d22fSVladimir Kondratiev } 14372be7d22fSVladimir Kondratiev 14389202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 14399202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 144054ed90a8SVladimir Kondratiev 144110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1442e00243faSLior David struct wil6210_vif *vif, 144354ed90a8SVladimir Kondratiev struct sk_buff *skb) 144454ed90a8SVladimir Kondratiev { 144510590c6aSGidon Studinski struct wil_ring *ring; 144654ed90a8SVladimir Kondratiev int i; 144754ed90a8SVladimir Kondratiev u8 cid; 144810590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 144996c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 145054ed90a8SVladimir Kondratiev 145154ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 145254ed90a8SVladimir Kondratiev * for the AP we connected to. 1453230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 145454ed90a8SVladimir Kondratiev */ 145596c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 145610590c6aSGidon Studinski ring = &wil->ring_tx[i]; 145710590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 145810590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 145954ed90a8SVladimir Kondratiev continue; 146054ed90a8SVladimir Kondratiev 146110590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1462ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 146341d6b093SVladimir Kondratiev continue; 146441d6b093SVladimir Kondratiev 146510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 146610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1467230d8442SVladimir Kondratiev continue; 146854ed90a8SVladimir Kondratiev 146954ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 147054ed90a8SVladimir Kondratiev 147110590c6aSGidon Studinski return ring; 147254ed90a8SVladimir Kondratiev } 147354ed90a8SVladimir Kondratiev 147410590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 147554ed90a8SVladimir Kondratiev 147654ed90a8SVladimir Kondratiev return NULL; 147754ed90a8SVladimir Kondratiev } 147854ed90a8SVladimir Kondratiev 147970812421SVladimir Kondratiev /* Use one of 2 strategies: 148070812421SVladimir Kondratiev * 148170812421SVladimir Kondratiev * 1. New (real broadcast): 148270812421SVladimir Kondratiev * use dedicated broadcast vring 148370812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 148470812421SVladimir Kondratiev * Find 1-st vring and return it; 148570812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 148670812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 148770812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 148870812421SVladimir Kondratiev * - for PBSS 148970812421SVladimir Kondratiev */ 149010590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1491e00243faSLior David struct wil6210_vif *vif, 1492fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1493fb3cac57SVladimir Kondratiev { 149410590c6aSGidon Studinski struct wil_ring *v; 149510590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 149610590c6aSGidon Studinski int i = vif->bcast_ring; 1497fb3cac57SVladimir Kondratiev 149841d6b093SVladimir Kondratiev if (i < 0) 149941d6b093SVladimir Kondratiev return NULL; 150010590c6aSGidon Studinski v = &wil->ring_tx[i]; 150110590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1502b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1503fb3cac57SVladimir Kondratiev return NULL; 150410590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 150510590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1506230d8442SVladimir Kondratiev return NULL; 1507fb3cac57SVladimir Kondratiev 1508fb3cac57SVladimir Kondratiev return v; 1509fb3cac57SVladimir Kondratiev } 1510fb3cac57SVladimir Kondratiev 15115e5f069cSAhmad Masri /* apply multicast to unicast only for ARP and IP packets 15125e5f069cSAhmad Masri * (see NL80211_CMD_SET_MULTICAST_TO_UNICAST for more info) 15135e5f069cSAhmad Masri */ 15145e5f069cSAhmad Masri static bool wil_check_multicast_to_unicast(struct wil6210_priv *wil, 15155e5f069cSAhmad Masri struct sk_buff *skb) 15165e5f069cSAhmad Masri { 15175e5f069cSAhmad Masri const struct ethhdr *eth = (void *)skb->data; 15185e5f069cSAhmad Masri const struct vlan_ethhdr *ethvlan = (void *)skb->data; 15195e5f069cSAhmad Masri __be16 ethertype; 15205e5f069cSAhmad Masri 15215e5f069cSAhmad Masri if (!wil->multicast_to_unicast) 15225e5f069cSAhmad Masri return false; 15235e5f069cSAhmad Masri 15245e5f069cSAhmad Masri /* multicast to unicast conversion only for some payload */ 15255e5f069cSAhmad Masri ethertype = eth->h_proto; 15265e5f069cSAhmad Masri if (ethertype == htons(ETH_P_8021Q) && skb->len >= VLAN_ETH_HLEN) 15275e5f069cSAhmad Masri ethertype = ethvlan->h_vlan_encapsulated_proto; 15285e5f069cSAhmad Masri switch (ethertype) { 15295e5f069cSAhmad Masri case htons(ETH_P_ARP): 15305e5f069cSAhmad Masri case htons(ETH_P_IP): 15315e5f069cSAhmad Masri case htons(ETH_P_IPV6): 15325e5f069cSAhmad Masri break; 15335e5f069cSAhmad Masri default: 15345e5f069cSAhmad Masri return false; 15355e5f069cSAhmad Masri } 15365e5f069cSAhmad Masri 15375e5f069cSAhmad Masri return true; 15385e5f069cSAhmad Masri } 15395e5f069cSAhmad Masri 154070812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 154170812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 154270812421SVladimir Kondratiev { 15436d1ba32cSAhmad Masri u8 *da = wil_skb_get_da(skb); 154410590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 154570812421SVladimir Kondratiev 15466d1ba32cSAhmad Masri ether_addr_copy(da, wil->sta[cid].addr); 154770812421SVladimir Kondratiev } 154870812421SVladimir Kondratiev 154910590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1550e00243faSLior David struct wil6210_vif *vif, 155170812421SVladimir Kondratiev struct sk_buff *skb) 155270812421SVladimir Kondratiev { 155310590c6aSGidon Studinski struct wil_ring *v, *v2; 155470812421SVladimir Kondratiev struct sk_buff *skb2; 155570812421SVladimir Kondratiev int i; 155670812421SVladimir Kondratiev u8 cid; 15576d1ba32cSAhmad Masri const u8 *src = wil_skb_get_sa(skb); 155810590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 155996c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 156070812421SVladimir Kondratiev 156170812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 156296c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 156310590c6aSGidon Studinski v = &wil->ring_tx[i]; 156410590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1565e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 156670812421SVladimir Kondratiev continue; 156770812421SVladimir Kondratiev 156810590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1569ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 157070812421SVladimir Kondratiev continue; 157110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 157210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 157370812421SVladimir Kondratiev continue; 157470812421SVladimir Kondratiev 157570812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 157670812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 157770812421SVladimir Kondratiev continue; 157870812421SVladimir Kondratiev 157970812421SVladimir Kondratiev goto found; 158070812421SVladimir Kondratiev } 158170812421SVladimir Kondratiev 158270812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 158370812421SVladimir Kondratiev 158470812421SVladimir Kondratiev return NULL; 158570812421SVladimir Kondratiev 158670812421SVladimir Kondratiev found: 158770812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 158870812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 158970812421SVladimir Kondratiev 159070812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 159170812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 159210590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 159310590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1594e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 159570812421SVladimir Kondratiev continue; 159610590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1597ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 159870812421SVladimir Kondratiev continue; 159910590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 160010590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 160170812421SVladimir Kondratiev continue; 160270812421SVladimir Kondratiev 160370812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 160470812421SVladimir Kondratiev continue; 160570812421SVladimir Kondratiev 160670812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 160770812421SVladimir Kondratiev if (skb2) { 160870812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 160970812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 16109202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 161166449740SLior David /* successful call to wil_tx_ring takes skb2 ref */ 161266449740SLior David dev_kfree_skb_any(skb2); 161370812421SVladimir Kondratiev } else { 161470812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 161570812421SVladimir Kondratiev } 161670812421SVladimir Kondratiev } 161770812421SVladimir Kondratiev 161870812421SVladimir Kondratiev return v; 161970812421SVladimir Kondratiev } 162070812421SVladimir Kondratiev 1621c236658fSVladimir Kondratiev static inline 1622c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1623c236658fSVladimir Kondratiev { 16243d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1625c236658fSVladimir Kondratiev } 1626c236658fSVladimir Kondratiev 1627e6636d64SLee Jones /* Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 16283d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 16293d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 16303d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 16313d4bde15SVladimir Kondratiev */ 16323d4bde15SVladimir Kondratiev 16333d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 16343d4bde15SVladimir Kondratiev struct sk_buff *skb, 16353d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 16363d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1637504937d4SKirshenbaum Erez { 16383d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 16393d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 16403d4bde15SVladimir Kondratiev 16413d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 16423d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 16433d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 16443d4bde15SVladimir Kondratiev 16453d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 16463d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 16473d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 16483d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 16493d4bde15SVladimir Kondratiev 16503d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 16513d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 16523d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 16533d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 16543d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 16553d4bde15SVladimir Kondratiev } 16563d4bde15SVladimir Kondratiev 1657e6636d64SLee Jones /* Sets the descriptor @d up for csum. The corresponding 16583d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 16593d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 16603d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 16613d4bde15SVladimir Kondratiev * 16623d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 16633d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 16643d4bde15SVladimir Kondratiev */ 16653d4bde15SVladimir Kondratiev 16663d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 16673d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1668504937d4SKirshenbaum Erez int protocol; 1669504937d4SKirshenbaum Erez 1670504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1671504937d4SKirshenbaum Erez return 0; 1672504937d4SKirshenbaum Erez 1673df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1674df2d08eeSVladimir Kondratiev 1675504937d4SKirshenbaum Erez switch (skb->protocol) { 1676504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1677504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1678df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1679504937d4SKirshenbaum Erez break; 1680504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1681504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1682504937d4SKirshenbaum Erez break; 1683504937d4SKirshenbaum Erez default: 1684504937d4SKirshenbaum Erez return -EINVAL; 1685504937d4SKirshenbaum Erez } 1686504937d4SKirshenbaum Erez 1687504937d4SKirshenbaum Erez switch (protocol) { 1688504937d4SKirshenbaum Erez case IPPROTO_TCP: 1689504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1690504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1691504937d4SKirshenbaum Erez d->dma.d0 |= 1692504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1693504937d4SKirshenbaum Erez break; 1694504937d4SKirshenbaum Erez case IPPROTO_UDP: 1695504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1696504937d4SKirshenbaum Erez d->dma.d0 |= 1697504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1698504937d4SKirshenbaum Erez break; 1699504937d4SKirshenbaum Erez default: 1700504937d4SKirshenbaum Erez return -EINVAL; 1701504937d4SKirshenbaum Erez } 1702504937d4SKirshenbaum Erez 1703504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1704504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1705504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1706504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1707504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1708504937d4SKirshenbaum Erez 1709504937d4SKirshenbaum Erez return 0; 1710504937d4SKirshenbaum Erez } 1711504937d4SKirshenbaum Erez 17123d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 17133d4bde15SVladimir Kondratiev { 17143d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 17153d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 17163d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 17173d4bde15SVladimir Kondratiev } 17183d4bde15SVladimir Kondratiev 17193d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 17203d4bde15SVladimir Kondratiev { 17213d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 17223d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 17233d4bde15SVladimir Kondratiev } 17243d4bde15SVladimir Kondratiev 1725e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 172610590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 17273d4bde15SVladimir Kondratiev { 17283d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17293d4bde15SVladimir Kondratiev 17303d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 17313d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 17323d4bde15SVladimir Kondratiev *_first_desc = NULL; 17333d4bde15SVladimir Kondratiev 17343d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 17353d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 17363d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 17373d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 17383d4bde15SVladimir Kondratiev 17393d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 17403d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 17413d4bde15SVladimir Kondratiev 17423d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 17433d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 17443d4bde15SVladimir Kondratiev 17453d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 174610590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 17473d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 17483d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 17493d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 17503d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 175110590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 175210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 17533d4bde15SVladimir Kondratiev uint i = swhead; 17543d4bde15SVladimir Kondratiev dma_addr_t pa; 17553d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 17563d4bde15SVladimir Kondratiev int rem_data = mss; 17573d4bde15SVladimir Kondratiev int lenmss; 17583d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 17593d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 17603d4bde15SVladimir Kondratiev bool is_ipv4; 17613d4bde15SVladimir Kondratiev int tcp_hdr_len; 17623d4bde15SVladimir Kondratiev int skb_net_hdr_len; 17633d4bde15SVladimir Kondratiev int gso_type; 1764e3d2ed94SHamad Kadmany int rc = -EINVAL; 17653d4bde15SVladimir Kondratiev 1766af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1767af3db60aSLazar Alexei vring_index); 17683d4bde15SVladimir Kondratiev 17693d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 17703d4bde15SVladimir Kondratiev return -EINVAL; 17713d4bde15SVladimir Kondratiev 17723d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 17733d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 17743d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 17753d4bde15SVladimir Kondratiev * this is the initial check only. 17763d4bde15SVladimir Kondratiev */ 17773d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 17783d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 17793d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 17803d4bde15SVladimir Kondratiev vring_index, min_desc_required); 17813d4bde15SVladimir Kondratiev return -ENOMEM; 17823d4bde15SVladimir Kondratiev } 17833d4bde15SVladimir Kondratiev 17843d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 17853d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 17863d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 17873d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 17883d4bde15SVladimir Kondratiev 17893d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 17903d4bde15SVladimir Kondratiev switch (gso_type) { 17913d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 17923d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 17933d4bde15SVladimir Kondratiev * as required by the offloading doc 17943d4bde15SVladimir Kondratiev */ 17953d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 17963d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 17973d4bde15SVladimir Kondratiev is_ipv4 = true; 17983d4bde15SVladimir Kondratiev break; 17993d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 18003d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 18013d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 18023d4bde15SVladimir Kondratiev is_ipv4 = false; 18033d4bde15SVladimir Kondratiev break; 18043d4bde15SVladimir Kondratiev default: 18053d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 18063d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 18073d4bde15SVladimir Kondratiev */ 18083d4bde15SVladimir Kondratiev return -EINVAL; 18093d4bde15SVladimir Kondratiev } 18103d4bde15SVladimir Kondratiev 18113d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 18123d4bde15SVladimir Kondratiev return -EINVAL; 18133d4bde15SVladimir Kondratiev 18143d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 18153d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 18163d4bde15SVladimir Kondratiev */ 18173d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 18183d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 18193d4bde15SVladimir Kondratiev 182010590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 18213d4bde15SVladimir Kondratiev 18223d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 18233d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 18243d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 18253d4bde15SVladimir Kondratiev goto err_exit; 18263d4bde15SVladimir Kondratiev } 18273d4bde15SVladimir Kondratiev 18289202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 18299202d7b6SMaya Erez hdrlen, vring_index); 18303d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 18313d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 18323d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 18333d4bde15SVladimir Kondratiev 18343d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 18353d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 18363d4bde15SVladimir Kondratiev 18373d4bde15SVladimir Kondratiev descs_used++; 18383d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 18393d4bde15SVladimir Kondratiev 18403d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 18413d4bde15SVladimir Kondratiev if (headlen) { 18423d4bde15SVladimir Kondratiev len = headlen; 18433d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 18443d4bde15SVladimir Kondratiev len); 18453d4bde15SVladimir Kondratiev } else { 18463d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 1847d7840976SMatthew Wilcox (Oracle) len = skb_frag_size(frag); 18483d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 18493d4bde15SVladimir Kondratiev } 18503d4bde15SVladimir Kondratiev 18513d4bde15SVladimir Kondratiev while (len) { 18523d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 18533d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 18543d4bde15SVladimir Kondratiev len, rem_data, descs_used); 18553d4bde15SVladimir Kondratiev 18563d4bde15SVladimir Kondratiev if (descs_used == avail) { 1857e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1858e3d2ed94SHamad Kadmany rc = -ENOMEM; 1859e3d2ed94SHamad Kadmany goto mem_error; 18603d4bde15SVladimir Kondratiev } 18613d4bde15SVladimir Kondratiev 18623d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 18633d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 18643d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 18653d4bde15SVladimir Kondratiev 18663d4bde15SVladimir Kondratiev if (!headlen) { 18673d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 1868d7840976SMatthew Wilcox (Oracle) skb_frag_size(frag) - len, 1869d7840976SMatthew Wilcox (Oracle) lenmss, DMA_TO_DEVICE); 18703d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 18713d4bde15SVladimir Kondratiev } else { 18723d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 18733d4bde15SVladimir Kondratiev skb->data + 18743d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 18753d4bde15SVladimir Kondratiev lenmss, 18763d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 18773d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 18783d4bde15SVladimir Kondratiev headlen -= lenmss; 18793d4bde15SVladimir Kondratiev } 18803d4bde15SVladimir Kondratiev 1881e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1882e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1883e3d2ed94SHamad Kadmany goto mem_error; 1884e3d2ed94SHamad Kadmany } 18853d4bde15SVladimir Kondratiev 188610590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 18873d4bde15SVladimir Kondratiev 18883d4bde15SVladimir Kondratiev if (!_first_desc) { 18893d4bde15SVladimir Kondratiev _first_desc = _desc; 18903d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 18913d4bde15SVladimir Kondratiev d = first_desc; 18923d4bde15SVladimir Kondratiev } else { 18933d4bde15SVladimir Kondratiev d = &desc_mem; 18943d4bde15SVladimir Kondratiev } 18953d4bde15SVladimir Kondratiev 18969202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 18979202d7b6SMaya Erez pa, lenmss, vring_index); 18983d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 18993d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 19003d4bde15SVladimir Kondratiev skb_net_hdr_len); 19013d4bde15SVladimir Kondratiev 19023d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 19033d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 19043d4bde15SVladimir Kondratiev 19053d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 19063d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 19073d4bde15SVladimir Kondratiev len -= lenmss; 19083d4bde15SVladimir Kondratiev rem_data -= lenmss; 19093d4bde15SVladimir Kondratiev 19103d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 19113d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 19123d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 19133d4bde15SVladimir Kondratiev 19143d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 19153d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 19163d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 19173d4bde15SVladimir Kondratiev /* first segment include hdr desc for 19183d4bde15SVladimir Kondratiev * release 19193d4bde15SVladimir Kondratiev */ 19203d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 19213d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 19223d4bde15SVladimir Kondratiev sg_desc_cnt + 19233d4bde15SVladimir Kondratiev 1); 19243d4bde15SVladimir Kondratiev hdr_compensation_need = false; 19253d4bde15SVladimir Kondratiev } else { 19263d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 19273d4bde15SVladimir Kondratiev sg_desc_cnt); 19283d4bde15SVladimir Kondratiev } 19293d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 19303d4bde15SVladimir Kondratiev 19313d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 19323d4bde15SVladimir Kondratiev 19333d4bde15SVladimir Kondratiev /* first descriptor may also be the last 19343d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 19353d4bde15SVladimir Kondratiev * it twice 19363d4bde15SVladimir Kondratiev */ 19373d4bde15SVladimir Kondratiev if (first_desc != d) 19383d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 19393d4bde15SVladimir Kondratiev 19403d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 19413d4bde15SVladimir Kondratiev * of this TS processing 19423d4bde15SVladimir Kondratiev */ 19433d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 19443d4bde15SVladimir Kondratiev *_desc = *d; 19453d4bde15SVladimir Kondratiev 19463d4bde15SVladimir Kondratiev rem_data = mss; 19473d4bde15SVladimir Kondratiev _first_desc = NULL; 19483d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 19493d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 19503d4bde15SVladimir Kondratiev *_desc = *d; 19513d4bde15SVladimir Kondratiev } 19523d4bde15SVladimir Kondratiev } 19533d4bde15SVladimir Kondratiev 19549c646597SAlexei Avshalom Lazar if (!_desc) 19559c646597SAlexei Avshalom Lazar goto mem_error; 19569c646597SAlexei Avshalom Lazar 19573d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 19583d4bde15SVladimir Kondratiev * in this case d pointer is invalid 19593d4bde15SVladimir Kondratiev */ 19603d4bde15SVladimir Kondratiev if (_first_desc == _desc) 19613d4bde15SVladimir Kondratiev d = first_desc; 19623d4bde15SVladimir Kondratiev 19633d4bde15SVladimir Kondratiev /* Last data descriptor */ 19643d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 19653d4bde15SVladimir Kondratiev *_desc = *d; 19663d4bde15SVladimir Kondratiev 19673d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 19683d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 19693d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 19703d4bde15SVladimir Kondratiev 19713d4bde15SVladimir Kondratiev /* hold reference to skb 19723d4bde15SVladimir Kondratiev * to prevent skb release before accounting 19733d4bde15SVladimir Kondratiev * in case of immediate "tx done" 19743d4bde15SVladimir Kondratiev */ 19753d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 19763d4bde15SVladimir Kondratiev 19773d4bde15SVladimir Kondratiev /* performance monitoring */ 197810590c6aSGidon Studinski used = wil_ring_used_tx(vring); 197910590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 19803d4bde15SVladimir Kondratiev used, used + descs_used)) { 19813d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 19823d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 19833d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 19843d4bde15SVladimir Kondratiev } 19853d4bde15SVladimir Kondratiev 1986eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1987eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1988eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1989eb26cff1SMaya Erez * skb before it was completed. 1990eb26cff1SMaya Erez */ 1991eb26cff1SMaya Erez wmb(); 1992eb26cff1SMaya Erez 19933d4bde15SVladimir Kondratiev /* advance swhead */ 199410590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1995e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 19963d4bde15SVladimir Kondratiev 19973d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 19983d4bde15SVladimir Kondratiev * committing them to HW 19993d4bde15SVladimir Kondratiev */ 20003d4bde15SVladimir Kondratiev wmb(); 20013d4bde15SVladimir Kondratiev 2002a24a3d6aSDedy Lansky if (wil->tx_latency) 2003a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 2004a24a3d6aSDedy Lansky else 2005a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 2006a24a3d6aSDedy Lansky 2007b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 20083d4bde15SVladimir Kondratiev return 0; 20093d4bde15SVladimir Kondratiev 2010e3d2ed94SHamad Kadmany mem_error: 20113d4bde15SVladimir Kondratiev while (descs_used > 0) { 20123d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 20133d4bde15SVladimir Kondratiev 2014a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 201510590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 201610590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 20173d4bde15SVladimir Kondratiev *d = *_desc; 20183d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 20193d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 20209202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 20213d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 20223d4bde15SVladimir Kondratiev descs_used--; 20233d4bde15SVladimir Kondratiev } 20243d4bde15SVladimir Kondratiev err_exit: 2025e3d2ed94SHamad Kadmany return rc; 20263d4bde15SVladimir Kondratiev } 20273d4bde15SVladimir Kondratiev 20289202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 20299202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 20302be7d22fSVladimir Kondratiev { 20312be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 203268ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 203368ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20349202d7b6SMaya Erez u32 swhead = ring->swhead; 20359202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 20362be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 2037504937d4SKirshenbaum Erez uint f = 0; 20389202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 20399202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 20402be7d22fSVladimir Kondratiev uint i = swhead; 20412be7d22fSVladimir Kondratiev dma_addr_t pa; 20420436fd9aSVladimir Shulman int used; 20439202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 204441d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 20452be7d22fSVladimir Kondratiev 204610590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 20479202d7b6SMaya Erez skb->len, ring_index, nr_frags); 20482be7d22fSVladimir Kondratiev 20495933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 20505933a06dSVladimir Kondratiev return -EINVAL; 20515933a06dSVladimir Kondratiev 205233c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 205370801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 20545b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 20559202d7b6SMaya Erez ring_index, 1 + nr_frags); 20562be7d22fSVladimir Kondratiev return -ENOMEM; 20572be7d22fSVladimir Kondratiev } 20589202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 20592be7d22fSVladimir Kondratiev 20608fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 20612be7d22fSVladimir Kondratiev 20629202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 20635b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 20647743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 20652be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 20662be7d22fSVladimir Kondratiev 20672be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 20682be7d22fSVladimir Kondratiev return -EINVAL; 20699202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 20702be7d22fSVladimir Kondratiev /* 1-st segment */ 20719202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 20729202d7b6SMaya Erez ring_index); 207341d6b093SVladimir Kondratiev if (unlikely(mcast)) { 207441d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 2075230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 207641d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 207741d6b093SVladimir Kondratiev } 2078504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 20793d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 20805b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 20819202d7b6SMaya Erez ring_index); 2082504937d4SKirshenbaum Erez goto dma_error; 2083504937d4SKirshenbaum Erez } 2084504937d4SKirshenbaum Erez 20859202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 20863d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 208768ada71eSVladimir Kondratiev 20882be7d22fSVladimir Kondratiev /* middle segments */ 2089504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 2090d7840976SMatthew Wilcox (Oracle) const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 20912be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 20928fe59627SVladimir Kondratiev 2093e59d16c0SVladimir Kondratiev *_d = *d; 20949202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 20955b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 20965b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 20979202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 20989202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 20992be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 21002be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 2101e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 2102e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 21039202d7b6SMaya Erez ring_index); 21042be7d22fSVladimir Kondratiev goto dma_error; 2105e3d2ed94SHamad Kadmany } 21069202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 21079202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 21089202d7b6SMaya Erez pa, len, ring_index); 2109c236658fSVladimir Kondratiev /* no need to check return code - 2110c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 2111c236658fSVladimir Kondratiev * it will succeed here too 2112c236658fSVladimir Kondratiev */ 21133d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 21142be7d22fSVladimir Kondratiev } 21152be7d22fSVladimir Kondratiev /* for the last seg only */ 21162be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 2117668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 21182be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 211968ada71eSVladimir Kondratiev *_d = *d; 21209202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 21215b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 21225b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 21232be7d22fSVladimir Kondratiev 21246cdadd4dSVladimir Kondratiev /* hold reference to skb 21256cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 21266cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 21276cdadd4dSVladimir Kondratiev */ 21289202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 21296cdadd4dSVladimir Kondratiev 21300436fd9aSVladimir Shulman /* performance monitoring */ 21319202d7b6SMaya Erez used = wil_ring_used_tx(ring); 213210590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 21330436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 21347c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 21350436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 21369202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 21370436fd9aSVladimir Shulman } 21387c0acf86SVladimir Kondratiev 2139eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 2140eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 2141eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 2142eb26cff1SMaya Erez * skb before it was completed. 2143eb26cff1SMaya Erez */ 2144eb26cff1SMaya Erez wmb(); 2145eb26cff1SMaya Erez 21462be7d22fSVladimir Kondratiev /* advance swhead */ 21479202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 21489202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 21499202d7b6SMaya Erez ring->swhead); 21509202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 21513d4bde15SVladimir Kondratiev 21523d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 21533d4bde15SVladimir Kondratiev * committing them to HW 21543d4bde15SVladimir Kondratiev */ 21553d4bde15SVladimir Kondratiev wmb(); 21563d4bde15SVladimir Kondratiev 2157a24a3d6aSDedy Lansky if (wil->tx_latency) 2158a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 2159a24a3d6aSDedy Lansky else 2160a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 2161a24a3d6aSDedy Lansky 21629202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 21632be7d22fSVladimir Kondratiev 21642be7d22fSVladimir Kondratiev return 0; 21652be7d22fSVladimir Kondratiev dma_error: 21662be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 2167c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 2168c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 2169c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 21707e594444SVladimir Kondratiev 21719202d7b6SMaya Erez i = (swhead + f) % ring->size; 21729202d7b6SMaya Erez ctx = &ring->ctx[i]; 21739202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 217468ada71eSVladimir Kondratiev *d = *_d; 217568ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 21769202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21779202d7b6SMaya Erez (union wil_tx_desc *)d, 21789202d7b6SMaya Erez ctx); 2179f88f113aSVladimir Kondratiev 2180f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 21812be7d22fSVladimir Kondratiev } 21822be7d22fSVladimir Kondratiev 21832be7d22fSVladimir Kondratiev return -EINVAL; 21842be7d22fSVladimir Kondratiev } 21852be7d22fSVladimir Kondratiev 21869202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 21879202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 21885933a06dSVladimir Kondratiev { 21899202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 219010590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 21915933a06dSVladimir Kondratiev int rc; 21925933a06dSVladimir Kondratiev 21935933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 21943d4bde15SVladimir Kondratiev 2195fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2196fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 2197fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 2198fe9ee51eSMaya Erez wil_dbg_txrx(wil, 2199fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 2200fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 2201fe9ee51eSMaya Erez return -EINVAL; 2202fe9ee51eSMaya Erez } 2203fe9ee51eSMaya Erez 22049202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 22059202d7b6SMaya Erez (wil, vif, ring, skb); 22063d4bde15SVladimir Kondratiev 22075933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 22083d4bde15SVladimir Kondratiev 22095933a06dSVladimir Kondratiev return rc; 22105933a06dSVladimir Kondratiev } 22115933a06dSVladimir Kondratiev 2212e6636d64SLee Jones /* Check status of tx vrings and stop/wake net queues if needed 22135bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 2214f9e3033fSDedy Lansky * 2215f9e3033fSDedy Lansky * This function does one of two checks: 2216f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 2217f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 2218f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 2219f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 2220f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 2221f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 2222f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 2223f9e3033fSDedy Lansky * 2224f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 2225f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 2226f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 2227f9e3033fSDedy Lansky */ 2228f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 22295bd60982SLior David struct wil6210_vif *vif, 223010590c6aSGidon Studinski struct wil_ring *ring, 2231f9e3033fSDedy Lansky bool check_stop) 2232f9e3033fSDedy Lansky { 2233f9e3033fSDedy Lansky int i; 2234df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 2235f9e3033fSDedy Lansky 22365bd60982SLior David if (unlikely(!vif)) 22375bd60982SLior David return; 2238f9e3033fSDedy Lansky 223910590c6aSGidon Studinski if (ring) 22405bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 224110590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 22425bd60982SLior David vif->net_queue_stopped); 22435bd60982SLior David else 22445bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 22455bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 22465bd60982SLior David 22470439a5e0SDedy Lansky if (ring && drop_if_ring_full) 22480439a5e0SDedy Lansky /* no need to stop/wake net queues */ 22490439a5e0SDedy Lansky return; 22500439a5e0SDedy Lansky 22515bd60982SLior David if (check_stop == vif->net_queue_stopped) 2252f9e3033fSDedy Lansky /* net queues already in desired state */ 2253f9e3033fSDedy Lansky return; 2254f9e3033fSDedy Lansky 2255f9e3033fSDedy Lansky if (check_stop) { 225610590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 2257f9e3033fSDedy Lansky /* not enough room in the vring */ 22585bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 22595bd60982SLior David vif->net_queue_stopped = true; 2260f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 2261f9e3033fSDedy Lansky } 2262f9e3033fSDedy Lansky return; 2263f9e3033fSDedy Lansky } 2264f9e3033fSDedy Lansky 2265fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 2266fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2267fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 2268fe9ee51eSMaya Erez return; 2269fe9ee51eSMaya Erez 2270f9e3033fSDedy Lansky /* check wake */ 2271df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 227210590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 227310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 2274f9e3033fSDedy Lansky 227510590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 227610590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 2277f9e3033fSDedy Lansky continue; 2278f9e3033fSDedy Lansky 227910590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 228010590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 228110590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 2282f9e3033fSDedy Lansky return; 2283f9e3033fSDedy Lansky } 2284f9e3033fSDedy Lansky } 2285f9e3033fSDedy Lansky 228610590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 228710590c6aSGidon Studinski /* enough room in the ring */ 2288f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 22895bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 22905bd60982SLior David vif->net_queue_stopped = false; 2291f9e3033fSDedy Lansky } 2292f9e3033fSDedy Lansky } 2293f9e3033fSDedy Lansky 22945bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 229510590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2296f9e3033fSDedy Lansky { 2297f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 229810590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2299f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2300f9e3033fSDedy Lansky } 2301f9e3033fSDedy Lansky 23025bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 230310590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2304f9e3033fSDedy Lansky { 2305f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 230610590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2307f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2308f9e3033fSDedy Lansky } 2309f9e3033fSDedy Lansky 23102be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 23112be7d22fSVladimir Kondratiev { 2312e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2313e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 23146d1ba32cSAhmad Masri const u8 *da = wil_skb_get_da(skb); 23156d1ba32cSAhmad Masri bool bcast = is_multicast_ether_addr(da); 23169202d7b6SMaya Erez struct wil_ring *ring; 2317aa27deaaSVladimir Kondratiev static bool pr_once_fw; 23182be7d22fSVladimir Kondratiev int rc; 23192be7d22fSVladimir Kondratiev 2320af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 232133c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2322aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 23232be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2324aa27deaaSVladimir Kondratiev pr_once_fw = true; 2325aa27deaaSVladimir Kondratiev } 23262be7d22fSVladimir Kondratiev goto drop; 23272be7d22fSVladimir Kondratiev } 23285bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 23295bd60982SLior David wil_dbg_ratelimited(wil, 23305bd60982SLior David "VIF not connected, packet dropped\n"); 23312be7d22fSVladimir Kondratiev goto drop; 23322be7d22fSVladimir Kondratiev } 2333e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 23342be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 23352be7d22fSVladimir Kondratiev goto drop; 23362be7d22fSVladimir Kondratiev } 2337aa27deaaSVladimir Kondratiev pr_once_fw = false; 2338d58db4e4SVladimir Kondratiev 23392be7d22fSVladimir Kondratiev /* find vring */ 2340e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2341a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 23429202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2343a895cb8bSLior David } else if (bcast) { 23445e5f069cSAhmad Masri if (vif->pbss || wil_check_multicast_to_unicast(wil, skb)) 2345a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2346a895cb8bSLior David * all stations VRINGs 2347a895cb8bSLior David */ 23489202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2349e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2350a895cb8bSLior David /* AP has a dedicated bcast VRING */ 23519202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2352a895cb8bSLior David else 2353a895cb8bSLior David /* unexpected combination, fallback to duplicating 2354a895cb8bSLior David * the skb in all stations VRINGs 2355a895cb8bSLior David */ 23569202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2357a895cb8bSLior David } else { 2358a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 23599202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 236054ed90a8SVladimir Kondratiev } 23619202d7b6SMaya Erez if (unlikely(!ring)) { 23626d1ba32cSAhmad Masri wil_dbg_txrx(wil, "No Tx RING found for %pM\n", da); 23632be7d22fSVladimir Kondratiev goto drop; 23642be7d22fSVladimir Kondratiev } 23652be7d22fSVladimir Kondratiev /* set up vring entry */ 23669202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2367d58db4e4SVladimir Kondratiev 23682be7d22fSVladimir Kondratiev switch (rc) { 23692be7d22fSVladimir Kondratiev case 0: 2370f9e3033fSDedy Lansky /* shall we stop net queues? */ 23719202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2372795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 23732be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 23742be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 23752be7d22fSVladimir Kondratiev case -ENOMEM: 23760439a5e0SDedy Lansky if (drop_if_ring_full) 23770439a5e0SDedy Lansky goto drop; 23782be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 23792be7d22fSVladimir Kondratiev default: 2380afda8bb5SVladimir Kondratiev break; /* goto drop; */ 23812be7d22fSVladimir Kondratiev } 23822be7d22fSVladimir Kondratiev drop: 23832be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 23842be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 23852be7d22fSVladimir Kondratiev 23862be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 23872be7d22fSVladimir Kondratiev } 23882be7d22fSVladimir Kondratiev 2389a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2390a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2391a24a3d6aSDedy Lansky { 2392a24a3d6aSDedy Lansky int skb_time_us; 2393a24a3d6aSDedy Lansky int bin; 2394a24a3d6aSDedy Lansky 2395a24a3d6aSDedy Lansky if (!wil->tx_latency) 2396a24a3d6aSDedy Lansky return; 2397a24a3d6aSDedy Lansky 2398a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2399a24a3d6aSDedy Lansky return; 2400a24a3d6aSDedy Lansky 2401a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2402a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2403a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2404a24a3d6aSDedy Lansky 2405a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2406a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2407a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2408a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2409a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2410a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2411a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2412a24a3d6aSDedy Lansky } 2413a24a3d6aSDedy Lansky 2414e6636d64SLee Jones /* Clean up transmitted skb's from the Tx VRING 24152be7d22fSVladimir Kondratiev * 2416e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2417e0287c4aSVladimir Kondratiev * 24182be7d22fSVladimir Kondratiev * Safe to call from IRQ 24192be7d22fSVladimir Kondratiev */ 24205bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 24212be7d22fSVladimir Kondratiev { 24225bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 24235bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 24242be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 242510590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 242610590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2427e0287c4aSVladimir Kondratiev int done = 0; 242810590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 242941d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2430c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 24310436fd9aSVladimir Shulman int used_before_complete; 24320436fd9aSVladimir Shulman int used_new; 24332be7d22fSVladimir Kondratiev 243433c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 24352be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2436e0287c4aSVladimir Kondratiev return 0; 24372be7d22fSVladimir Kondratiev } 24382be7d22fSVladimir Kondratiev 243933c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2440097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2441097638a0SVladimir Kondratiev return 0; 2442097638a0SVladimir Kondratiev } 2443097638a0SVladimir Kondratiev 2444af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 24452be7d22fSVladimir Kondratiev 244610590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 24470436fd9aSVladimir Shulman 2448ddf7afddSAhmad Masri if (cid < wil->max_assoc_sta) 244941d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 245041d6b093SVladimir Kondratiev 245110590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2452c236658fSVladimir Kondratiev int new_swtail; 2453c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2454e6636d64SLee Jones /* For the fragmented skb, HW will set DU bit only for the 24553d4bde15SVladimir Kondratiev * last fragment. look for it. 24563d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2457c236658fSVladimir Kondratiev */ 2458c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2459c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2460c236658fSVladimir Kondratiev 246110590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 246233c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2463c236658fSVladimir Kondratiev break; 2464c236658fSVladimir Kondratiev 2465c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2466c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 24674de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 24687e594444SVladimir Kondratiev u16 dmalen; 246976dfa4b7SVladimir Kondratiev struct sk_buff *skb; 247076dfa4b7SVladimir Kondratiev 247176dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 247276dfa4b7SVladimir Kondratiev skb = ctx->skb; 247310590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 24744de41befSVladimir Kondratiev 247568ada71eSVladimir Kondratiev *d = *_d; 24764de41befSVladimir Kondratiev 24777e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 247898658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 247998658095SVladimir Kondratiev d->dma.error); 24807743882dSVladimir Kondratiev wil_dbg_txrx(wil, 24815b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 24825b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 24835b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 24845b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 24852be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 24862be7d22fSVladimir Kondratiev 24879202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 24889202d7b6SMaya Erez (union wil_tx_desc *)d, 24899202d7b6SMaya Erez ctx); 2490f88f113aSVladimir Kondratiev 24912be7d22fSVladimir Kondratiev if (skb) { 249233c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2493795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2494795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 249541d6b093SVladimir Kondratiev if (stats) { 249641d6b093SVladimir Kondratiev stats->tx_packets++; 2497c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2498a24a3d6aSDedy Lansky 2499a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2500a24a3d6aSDedy Lansky &wil->sta[cid]); 250141d6b093SVladimir Kondratiev } 2502795ce734SVladimir Kondratiev } else { 2503795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 250441d6b093SVladimir Kondratiev if (stats) 2505c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2506795ce734SVladimir Kondratiev } 250742fe1e51SAhmad Masri 250842fe1e51SAhmad Masri if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 250942fe1e51SAhmad Masri wil_tx_complete_handle_eapol(vif, skb); 251042fe1e51SAhmad Masri 2511713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 25122be7d22fSVladimir Kondratiev } 2513f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2514eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 251510590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2516eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2517eb26cff1SMaya Erez * is completed. 2518eb26cff1SMaya Erez */ 2519eb26cff1SMaya Erez wmb(); 2520c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 252103269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 252203269c65SVladimir Kondratiev * so hardware will not try to process this desc., 252303269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 252403269c65SVladimir Kondratiev */ 252510590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2526e0287c4aSVladimir Kondratiev done++; 25272be7d22fSVladimir Kondratiev } 2528c236658fSVladimir Kondratiev } 252967c3e1b4SVladimir Kondratiev 25300436fd9aSVladimir Shulman /* performance monitoring */ 253110590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 253210590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 25330436fd9aSVladimir Shulman used_new, used_before_complete)) { 25340436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 25350436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 25367c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 25377c0acf86SVladimir Kondratiev } 253867c3e1b4SVladimir Kondratiev 2539f9e3033fSDedy Lansky /* shall we wake net queues? */ 2540f9e3033fSDedy Lansky if (done) 25415bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2542e0287c4aSVladimir Kondratiev 2543e0287c4aSVladimir Kondratiev return done; 25442be7d22fSVladimir Kondratiev } 254596c93589SGidon Studinski 254696c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 254796c93589SGidon Studinski { 254896c93589SGidon Studinski return 0; 254996c93589SGidon Studinski } 255096c93589SGidon Studinski 255196c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 255296c93589SGidon Studinski 25537be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 25547be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 25551bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 25567be13fc3SGidon Studinski { 25577be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 25587be13fc3SGidon Studinski 25597be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 2560bf0353a6SAhmad Masri *cid = wil_skb_get_cid(skb); 25617be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 25627be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 25637be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 25641bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 25657be13fc3SGidon Studinski } 25667be13fc3SGidon Studinski 256796c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 256896c93589SGidon Studinski { 256996c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 257096c93589SGidon Studinski wil_configure_interrupt_moderation; 257196c93589SGidon Studinski /* TX ops */ 25729202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 25739202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 25749202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 257596c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 257696c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 257796c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 257896c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 257996c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 2580b9010f10SAhmad Masri wil->txrx_ops.tx_ring_modify = wil_tx_vring_modify; 258196c93589SGidon Studinski /* RX ops */ 258296c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 25837be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 25847be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 25857be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 25867be13fc3SGidon Studinski wil_get_netif_rx_params; 25877be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2588e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 25897be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 259096c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 259196c93589SGidon Studinski } 2592