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> 13504937d4SKirshenbaum Erez #include <net/ipv6.h> 140786dc4eSVladimir Kondratiev #include <linux/prefetch.h> 152be7d22fSVladimir Kondratiev 162be7d22fSVladimir Kondratiev #include "wil6210.h" 172be7d22fSVladimir Kondratiev #include "wmi.h" 182be7d22fSVladimir Kondratiev #include "txrx.h" 1998658095SVladimir Kondratiev #include "trace.h" 207be13fc3SGidon Studinski #include "txrx_edma.h" 212be7d22fSVladimir Kondratiev 22c406ea7cSVladimir Kondratiev bool rx_align_2; 2378484c44SMaya Erez module_param(rx_align_2, bool, 0444); 24c406ea7cSVladimir Kondratiev MODULE_PARM_DESC(rx_align_2, " align Rx buffers on 4*n+2, default - no"); 25c406ea7cSVladimir Kondratiev 2652a45702SLior David bool rx_large_buf; 2752a45702SLior David module_param(rx_large_buf, bool, 0444); 2852a45702SLior David MODULE_PARM_DESC(rx_large_buf, " allocate 8KB RX buffers, default - no"); 2952a45702SLior David 300439a5e0SDedy Lansky /* Drop Tx packets in case Tx ring is full */ 310439a5e0SDedy Lansky bool drop_if_ring_full; 320439a5e0SDedy Lansky 33c406ea7cSVladimir Kondratiev static inline uint wil_rx_snaplen(void) 34c406ea7cSVladimir Kondratiev { 35c406ea7cSVladimir Kondratiev return rx_align_2 ? 6 : 0; 36c406ea7cSVladimir Kondratiev } 37c406ea7cSVladimir Kondratiev 3810590c6aSGidon Studinski /* wil_ring_wmark_low - low watermark for available descriptor space */ 3910590c6aSGidon Studinski static inline int wil_ring_wmark_low(struct wil_ring *ring) 402be7d22fSVladimir Kondratiev { 4110590c6aSGidon Studinski return ring->size / 8; 422be7d22fSVladimir Kondratiev } 432be7d22fSVladimir Kondratiev 4410590c6aSGidon Studinski /* wil_ring_wmark_high - high watermark for available descriptor space */ 4510590c6aSGidon Studinski static inline int wil_ring_wmark_high(struct wil_ring *ring) 462be7d22fSVladimir Kondratiev { 4710590c6aSGidon Studinski return ring->size / 4; 485bb6423eSVladimir Kondratiev } 495bb6423eSVladimir Kondratiev 50f9e3033fSDedy Lansky /* returns true if num avail descriptors is lower than wmark_low */ 5110590c6aSGidon Studinski static inline int wil_ring_avail_low(struct wil_ring *ring) 52f9e3033fSDedy Lansky { 5310590c6aSGidon Studinski return wil_ring_avail_tx(ring) < wil_ring_wmark_low(ring); 54f9e3033fSDedy Lansky } 55f9e3033fSDedy Lansky 56f9e3033fSDedy Lansky /* returns true if num avail descriptors is higher than wmark_high */ 5710590c6aSGidon Studinski static inline int wil_ring_avail_high(struct wil_ring *ring) 58f9e3033fSDedy Lansky { 5910590c6aSGidon Studinski return wil_ring_avail_tx(ring) > wil_ring_wmark_high(ring); 60f9e3033fSDedy Lansky } 61f9e3033fSDedy Lansky 62fe9ee51eSMaya Erez /* returns true when all tx vrings are empty */ 63fe9ee51eSMaya Erez bool wil_is_tx_idle(struct wil6210_priv *wil) 64fe9ee51eSMaya Erez { 65fe9ee51eSMaya Erez int i; 66fe9ee51eSMaya Erez unsigned long data_comp_to; 67df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 68fe9ee51eSMaya Erez 69df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 7010590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[i]; 7110590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 7210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = 7310590c6aSGidon Studinski &wil->ring_tx_data[vring_index]; 74fe9ee51eSMaya Erez 75fe9ee51eSMaya Erez spin_lock(&txdata->lock); 76fe9ee51eSMaya Erez 77fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) { 78fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 79fe9ee51eSMaya Erez continue; 80fe9ee51eSMaya Erez } 81fe9ee51eSMaya Erez 82fe9ee51eSMaya Erez data_comp_to = jiffies + msecs_to_jiffies( 83fe9ee51eSMaya Erez WIL_DATA_COMPLETION_TO_MS); 84fe9ee51eSMaya Erez if (test_bit(wil_status_napi_en, wil->status)) { 8510590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 86fe9ee51eSMaya Erez if (time_after(jiffies, data_comp_to)) { 87fe9ee51eSMaya Erez wil_dbg_pm(wil, 88fe9ee51eSMaya Erez "TO waiting for idle tx\n"); 89fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 90fe9ee51eSMaya Erez return false; 91fe9ee51eSMaya Erez } 92fe9ee51eSMaya Erez wil_dbg_ratelimited(wil, 93fe9ee51eSMaya Erez "tx vring is not empty -> NAPI\n"); 94fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 95fe9ee51eSMaya Erez napi_synchronize(&wil->napi_tx); 96fe9ee51eSMaya Erez msleep(20); 97fe9ee51eSMaya Erez spin_lock(&txdata->lock); 98fe9ee51eSMaya Erez if (!vring->va || !txdata->enabled) 99fe9ee51eSMaya Erez break; 100fe9ee51eSMaya Erez } 101fe9ee51eSMaya Erez } 102fe9ee51eSMaya Erez 103fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 104fe9ee51eSMaya Erez } 105fe9ee51eSMaya Erez 106fe9ee51eSMaya Erez return true; 107fe9ee51eSMaya Erez } 108fe9ee51eSMaya Erez 10910590c6aSGidon Studinski static int wil_vring_alloc(struct wil6210_priv *wil, struct wil_ring *vring) 1102be7d22fSVladimir Kondratiev { 1112be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1122be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1132be7d22fSVladimir Kondratiev uint i; 1142be7d22fSVladimir Kondratiev 115af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_alloc:\n"); 1169cf10d62SVladimir Kondratiev 1172be7d22fSVladimir Kondratiev BUILD_BUG_ON(sizeof(vring->va[0]) != 32); 1182be7d22fSVladimir Kondratiev 1192be7d22fSVladimir Kondratiev vring->swhead = 0; 1202be7d22fSVladimir Kondratiev vring->swtail = 0; 121f88f113aSVladimir Kondratiev vring->ctx = kcalloc(vring->size, sizeof(vring->ctx[0]), GFP_KERNEL); 1222be7d22fSVladimir Kondratiev if (!vring->ctx) { 1232be7d22fSVladimir Kondratiev vring->va = NULL; 1242be7d22fSVladimir Kondratiev return -ENOMEM; 1252be7d22fSVladimir Kondratiev } 126f2de576dSHamad Kadmany 1270436fd9aSVladimir Shulman /* vring->va should be aligned on its size rounded up to power of 2 128f2de576dSHamad Kadmany * This is granted by the dma_alloc_coherent. 129f2de576dSHamad Kadmany * 130f2de576dSHamad Kadmany * HW has limitation that all vrings addresses must share the same 131f2de576dSHamad Kadmany * upper 16 msb bits part of 48 bits address. To workaround that, 1323dc2c13bSLazar Alexei * if we are using more than 32 bit addresses switch to 32 bit 1333dc2c13bSLazar Alexei * allocation before allocating vring memory. 134f2de576dSHamad Kadmany * 135f2de576dSHamad Kadmany * There's no check for the return value of dma_set_mask_and_coherent, 136f2de576dSHamad Kadmany * since we assume if we were able to set the mask during 137f2de576dSHamad Kadmany * initialization in this system it will not fail if we set it again 1382be7d22fSVladimir Kondratiev */ 1393dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 140f2de576dSHamad Kadmany dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); 141f2de576dSHamad Kadmany 1422be7d22fSVladimir Kondratiev vring->va = dma_alloc_coherent(dev, sz, &vring->pa, GFP_KERNEL); 1432be7d22fSVladimir Kondratiev if (!vring->va) { 1442be7d22fSVladimir Kondratiev kfree(vring->ctx); 1452be7d22fSVladimir Kondratiev vring->ctx = NULL; 1462be7d22fSVladimir Kondratiev return -ENOMEM; 1472be7d22fSVladimir Kondratiev } 148f2de576dSHamad Kadmany 1493dc2c13bSLazar Alexei if (wil->dma_addr_size > 32) 1503dc2c13bSLazar Alexei dma_set_mask_and_coherent(dev, 1513dc2c13bSLazar Alexei DMA_BIT_MASK(wil->dma_addr_size)); 152f2de576dSHamad Kadmany 1532be7d22fSVladimir Kondratiev /* initially, all descriptors are SW owned 1542be7d22fSVladimir Kondratiev * For Tx and Rx, ownership bit is at the same location, thus 1552be7d22fSVladimir Kondratiev * we can use any 1562be7d22fSVladimir Kondratiev */ 1572be7d22fSVladimir Kondratiev for (i = 0; i < vring->size; i++) { 15810590c6aSGidon Studinski volatile struct vring_tx_desc *_d = 15910590c6aSGidon Studinski &vring->va[i].tx.legacy; 1608fe59627SVladimir Kondratiev 16168ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 1622be7d22fSVladimir Kondratiev } 1632be7d22fSVladimir Kondratiev 16439c52ee8SVladimir Kondratiev wil_dbg_misc(wil, "vring[%d] 0x%p:%pad 0x%p\n", vring->size, 16539c52ee8SVladimir Kondratiev vring->va, &vring->pa, vring->ctx); 1662be7d22fSVladimir Kondratiev 1672be7d22fSVladimir Kondratiev return 0; 1682be7d22fSVladimir Kondratiev } 1692be7d22fSVladimir Kondratiev 1709202d7b6SMaya Erez static void wil_txdesc_unmap(struct device *dev, union wil_tx_desc *desc, 1712232abd5SVladimir Kondratiev struct wil_ctx *ctx) 1722232abd5SVladimir Kondratiev { 1739202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 1742232abd5SVladimir Kondratiev dma_addr_t pa = wil_desc_addr(&d->dma.addr); 1752232abd5SVladimir Kondratiev u16 dmalen = le16_to_cpu(d->dma.length); 1768fe59627SVladimir Kondratiev 1772232abd5SVladimir Kondratiev switch (ctx->mapped_as) { 1782232abd5SVladimir Kondratiev case wil_mapped_as_single: 1792232abd5SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); 1802232abd5SVladimir Kondratiev break; 1812232abd5SVladimir Kondratiev case wil_mapped_as_page: 1822232abd5SVladimir Kondratiev dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); 1832232abd5SVladimir Kondratiev break; 1842232abd5SVladimir Kondratiev default: 1852232abd5SVladimir Kondratiev break; 1862232abd5SVladimir Kondratiev } 1872232abd5SVladimir Kondratiev } 1882232abd5SVladimir Kondratiev 18996c93589SGidon Studinski static void wil_vring_free(struct wil6210_priv *wil, struct wil_ring *vring) 1902be7d22fSVladimir Kondratiev { 1912be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 1922be7d22fSVladimir Kondratiev size_t sz = vring->size * sizeof(vring->va[0]); 1932be7d22fSVladimir Kondratiev 1949b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 19596c93589SGidon Studinski if (!vring->is_rx) { 19610590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 197ef77285fSVladimir Kondratiev 198ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Tx vring %d [%d] 0x%p:%pad 0x%p\n", 199ef77285fSVladimir Kondratiev vring_index, vring->size, vring->va, 200ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 201ef77285fSVladimir Kondratiev } else { 202ef77285fSVladimir Kondratiev wil_dbg_misc(wil, "free Rx vring [%d] 0x%p:%pad 0x%p\n", 203ef77285fSVladimir Kondratiev vring->size, vring->va, 204ef77285fSVladimir Kondratiev &vring->pa, vring->ctx); 205ef77285fSVladimir Kondratiev } 206ef77285fSVladimir Kondratiev 20710590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 20868ada71eSVladimir Kondratiev dma_addr_t pa; 2097e594444SVladimir Kondratiev u16 dmalen; 210f88f113aSVladimir Kondratiev struct wil_ctx *ctx; 21168ada71eSVladimir Kondratiev 21296c93589SGidon Studinski if (!vring->is_rx) { 21368ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 21468ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d = 21510590c6aSGidon Studinski &vring->va[vring->swtail].tx.legacy; 21668ada71eSVladimir Kondratiev 217f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 21834b8886eSMaya Erez if (!ctx) { 21934b8886eSMaya Erez wil_dbg_txrx(wil, 22034b8886eSMaya Erez "ctx(%d) was already completed\n", 22134b8886eSMaya Erez vring->swtail); 22210590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 22334b8886eSMaya Erez continue; 22434b8886eSMaya Erez } 22568ada71eSVladimir Kondratiev *d = *_d; 2269202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 227f88f113aSVladimir Kondratiev if (ctx->skb) 228f88f113aSVladimir Kondratiev dev_kfree_skb_any(ctx->skb); 22910590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2302be7d22fSVladimir Kondratiev } else { /* rx */ 23168ada71eSVladimir Kondratiev struct vring_rx_desc dd, *d = ⅆ 23268ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d = 23310590c6aSGidon Studinski &vring->va[vring->swhead].rx.legacy; 23468ada71eSVladimir Kondratiev 235f88f113aSVladimir Kondratiev ctx = &vring->ctx[vring->swhead]; 23668ada71eSVladimir Kondratiev *d = *_d; 23768ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 2387e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 2397e594444SVladimir Kondratiev dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); 240f88f113aSVladimir Kondratiev kfree_skb(ctx->skb); 24110590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 2422be7d22fSVladimir Kondratiev } 2432be7d22fSVladimir Kondratiev } 2442be7d22fSVladimir Kondratiev dma_free_coherent(dev, sz, (void *)vring->va, vring->pa); 2452be7d22fSVladimir Kondratiev kfree(vring->ctx); 2462be7d22fSVladimir Kondratiev vring->pa = 0; 2472be7d22fSVladimir Kondratiev vring->va = NULL; 2482be7d22fSVladimir Kondratiev vring->ctx = NULL; 2492be7d22fSVladimir Kondratiev } 2502be7d22fSVladimir Kondratiev 2512be7d22fSVladimir Kondratiev /** 2522be7d22fSVladimir Kondratiev * 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 2972be7d22fSVladimir Kondratiev /** 2982be7d22fSVladimir Kondratiev * Adds radiotap header 2992be7d22fSVladimir Kondratiev * 3002be7d22fSVladimir Kondratiev * Any error indicated as "Bad FCS" 3012be7d22fSVladimir Kondratiev * 3022be7d22fSVladimir Kondratiev * Vendor data for 04:ce:14-1 (Wilocity-1) consists of: 3032be7d22fSVladimir Kondratiev * - Rx descriptor: 32 bytes 3042be7d22fSVladimir Kondratiev * - Phy info 3052be7d22fSVladimir Kondratiev */ 3062be7d22fSVladimir Kondratiev static void wil_rx_add_radiotap_header(struct wil6210_priv *wil, 30733e61169SVladimir Kondratiev struct sk_buff *skb) 3082be7d22fSVladimir Kondratiev { 3092be7d22fSVladimir Kondratiev struct wil6210_rtap { 3102be7d22fSVladimir Kondratiev struct ieee80211_radiotap_header rthdr; 3112be7d22fSVladimir Kondratiev /* fields should be in the order of bits in rthdr.it_present */ 3122be7d22fSVladimir Kondratiev /* flags */ 3132be7d22fSVladimir Kondratiev u8 flags; 3142be7d22fSVladimir Kondratiev /* channel */ 3152be7d22fSVladimir Kondratiev __le16 chnl_freq __aligned(2); 3162be7d22fSVladimir Kondratiev __le16 chnl_flags; 3172be7d22fSVladimir Kondratiev /* MCS */ 3182be7d22fSVladimir Kondratiev u8 mcs_present; 3192be7d22fSVladimir Kondratiev u8 mcs_flags; 3202be7d22fSVladimir Kondratiev u8 mcs_index; 3212be7d22fSVladimir Kondratiev } __packed; 32233e61169SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 323387f3794SMaya Erez struct wil6210_rtap *rtap; 3242be7d22fSVladimir Kondratiev int rtap_len = sizeof(struct wil6210_rtap); 3257d3e4dbeSLior David struct ieee80211_channel *ch = wil->monitor_chandef.chan; 3262be7d22fSVladimir Kondratiev 3272be7d22fSVladimir Kondratiev if (skb_headroom(skb) < rtap_len && 3282be7d22fSVladimir Kondratiev pskb_expand_head(skb, rtap_len, 0, GFP_ATOMIC)) { 3299165dabbSMasanari Iida wil_err(wil, "Unable to expand headroom to %d\n", rtap_len); 3302be7d22fSVladimir Kondratiev return; 3312be7d22fSVladimir Kondratiev } 3322be7d22fSVladimir Kondratiev 333387f3794SMaya Erez rtap = skb_push(skb, rtap_len); 334387f3794SMaya Erez memset(rtap, 0, rtap_len); 3352be7d22fSVladimir Kondratiev 336387f3794SMaya Erez rtap->rthdr.it_version = PKTHDR_RADIOTAP_VERSION; 337387f3794SMaya Erez rtap->rthdr.it_len = cpu_to_le16(rtap_len); 338387f3794SMaya Erez rtap->rthdr.it_present = cpu_to_le32((1 << IEEE80211_RADIOTAP_FLAGS) | 3392be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_CHANNEL) | 3402be7d22fSVladimir Kondratiev (1 << IEEE80211_RADIOTAP_MCS)); 3412be7d22fSVladimir Kondratiev if (d->dma.status & RX_DMA_STATUS_ERROR) 342387f3794SMaya Erez rtap->flags |= IEEE80211_RADIOTAP_F_BADFCS; 3432be7d22fSVladimir Kondratiev 344387f3794SMaya Erez rtap->chnl_freq = cpu_to_le16(ch ? ch->center_freq : 58320); 345387f3794SMaya Erez rtap->chnl_flags = cpu_to_le16(0); 3462be7d22fSVladimir Kondratiev 347387f3794SMaya Erez rtap->mcs_present = IEEE80211_RADIOTAP_MCS_HAVE_MCS; 348387f3794SMaya Erez rtap->mcs_flags = 0; 349387f3794SMaya Erez rtap->mcs_index = wil_rxdesc_mcs(d); 3502be7d22fSVladimir Kondratiev } 3512be7d22fSVladimir Kondratiev 3527be13fc3SGidon Studinski static bool wil_is_rx_idle(struct wil6210_priv *wil) 353fe9ee51eSMaya Erez { 354fe9ee51eSMaya Erez struct vring_rx_desc *_d; 35510590c6aSGidon Studinski struct wil_ring *ring = &wil->ring_rx; 356fe9ee51eSMaya Erez 35710590c6aSGidon Studinski _d = (struct vring_rx_desc *)&ring->va[ring->swhead].rx.legacy; 358fe9ee51eSMaya Erez if (_d->dma.status & RX_DMA_STATUS_DU) 359fe9ee51eSMaya Erez return false; 360fe9ee51eSMaya Erez 361fe9ee51eSMaya Erez return true; 362fe9ee51eSMaya Erez } 363fe9ee51eSMaya Erez 364bf0353a6SAhmad Masri static int wil_rx_get_cid_by_skb(struct wil6210_priv *wil, struct sk_buff *skb) 365bf0353a6SAhmad Masri { 366bf0353a6SAhmad Masri struct vring_rx_desc *d = wil_skb_rxdesc(skb); 367bf0353a6SAhmad Masri int mid = wil_rxdesc_mid(d); 368bf0353a6SAhmad Masri struct wil6210_vif *vif = wil->vifs[mid]; 369bf0353a6SAhmad Masri /* cid from DMA descriptor is limited to 3 bits. 370bf0353a6SAhmad Masri * In case of cid>=8, the value would be cid modulo 8 and we need to 371bf0353a6SAhmad Masri * find real cid by locating the transmitter (ta) inside sta array 372bf0353a6SAhmad Masri */ 373bf0353a6SAhmad Masri int cid = wil_rxdesc_cid(d); 374bf0353a6SAhmad Masri unsigned int snaplen = wil_rx_snaplen(); 375bf0353a6SAhmad Masri struct ieee80211_hdr_3addr *hdr; 376bf0353a6SAhmad Masri int i; 377bf0353a6SAhmad Masri unsigned char *ta; 378bf0353a6SAhmad Masri u8 ftype; 379bf0353a6SAhmad Masri 380bf0353a6SAhmad Masri /* in monitor mode there are no connections */ 381bf0353a6SAhmad Masri if (vif->wdev.iftype == NL80211_IFTYPE_MONITOR) 382bf0353a6SAhmad Masri return cid; 383bf0353a6SAhmad Masri 384bf0353a6SAhmad Masri ftype = wil_rxdesc_ftype(d) << 2; 385bf0353a6SAhmad Masri if (likely(ftype == IEEE80211_FTYPE_DATA)) { 386bf0353a6SAhmad Masri if (unlikely(skb->len < ETH_HLEN + snaplen)) { 387bf0353a6SAhmad Masri wil_err_ratelimited(wil, 388bf0353a6SAhmad Masri "Short data frame, len = %d\n", 389bf0353a6SAhmad Masri skb->len); 390bf0353a6SAhmad Masri return -ENOENT; 391bf0353a6SAhmad Masri } 3926d1ba32cSAhmad Masri ta = wil_skb_get_sa(skb); 393bf0353a6SAhmad Masri } else { 394bf0353a6SAhmad Masri if (unlikely(skb->len < sizeof(struct ieee80211_hdr_3addr))) { 395bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Short frame, len = %d\n", 396bf0353a6SAhmad Masri skb->len); 397bf0353a6SAhmad Masri return -ENOENT; 398bf0353a6SAhmad Masri } 399bf0353a6SAhmad Masri hdr = (void *)skb->data; 400bf0353a6SAhmad Masri ta = hdr->addr2; 401bf0353a6SAhmad Masri } 402bf0353a6SAhmad Masri 403ddf7afddSAhmad Masri if (wil->max_assoc_sta <= WIL6210_RX_DESC_MAX_CID) 404bf0353a6SAhmad Masri return cid; 405bf0353a6SAhmad Masri 406bf0353a6SAhmad Masri /* assuming no concurrency between AP interfaces and STA interfaces. 407bf0353a6SAhmad Masri * multista is used only in P2P_GO or AP mode. In other modes return 408bf0353a6SAhmad Masri * cid from the rx descriptor 409bf0353a6SAhmad Masri */ 410bf0353a6SAhmad Masri if (vif->wdev.iftype != NL80211_IFTYPE_P2P_GO && 411bf0353a6SAhmad Masri vif->wdev.iftype != NL80211_IFTYPE_AP) 412bf0353a6SAhmad Masri return cid; 413bf0353a6SAhmad Masri 414bf0353a6SAhmad Masri /* For Rx packets cid from rx descriptor is limited to 3 bits (0..7), 415bf0353a6SAhmad Masri * to find the real cid, compare transmitter address with the stored 416bf0353a6SAhmad Masri * stations mac address in the driver sta array 417bf0353a6SAhmad Masri */ 418ddf7afddSAhmad Masri for (i = cid; i < wil->max_assoc_sta; i += WIL6210_RX_DESC_MAX_CID) { 419bf0353a6SAhmad Masri if (wil->sta[i].status != wil_sta_unused && 420bf0353a6SAhmad Masri ether_addr_equal(wil->sta[i].addr, ta)) { 421bf0353a6SAhmad Masri cid = i; 422bf0353a6SAhmad Masri break; 423bf0353a6SAhmad Masri } 424bf0353a6SAhmad Masri } 425ddf7afddSAhmad Masri if (i >= wil->max_assoc_sta) { 426bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Could not find cid for frame with transmit addr = %pM, iftype = %d, frametype = %d, len = %d\n", 427bf0353a6SAhmad Masri ta, vif->wdev.iftype, ftype, skb->len); 428bf0353a6SAhmad Masri cid = -ENOENT; 429bf0353a6SAhmad Masri } 430bf0353a6SAhmad Masri 431bf0353a6SAhmad Masri return cid; 432bf0353a6SAhmad Masri } 433bf0353a6SAhmad Masri 4342be7d22fSVladimir Kondratiev /** 4352be7d22fSVladimir Kondratiev * reap 1 frame from @swhead 4362be7d22fSVladimir Kondratiev * 43733e61169SVladimir Kondratiev * Rx descriptor copied to skb->cb 43833e61169SVladimir Kondratiev * 4392be7d22fSVladimir Kondratiev * Safe to call from IRQ 4402be7d22fSVladimir Kondratiev */ 4412be7d22fSVladimir Kondratiev static struct sk_buff *wil_vring_reap_rx(struct wil6210_priv *wil, 44210590c6aSGidon Studinski struct wil_ring *vring) 4432be7d22fSVladimir Kondratiev { 4442be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 4455bd60982SLior David struct wil6210_vif *vif; 4465bd60982SLior David struct net_device *ndev; 44768ada71eSVladimir Kondratiev volatile struct vring_rx_desc *_d; 44868ada71eSVladimir Kondratiev struct vring_rx_desc *d; 4492be7d22fSVladimir Kondratiev struct sk_buff *skb; 4502be7d22fSVladimir Kondratiev dma_addr_t pa; 451c406ea7cSVladimir Kondratiev unsigned int snaplen = wil_rx_snaplen(); 45252a45702SLior David unsigned int sz = wil->rx_buf_len + ETH_HLEN + snaplen; 4537e594444SVladimir Kondratiev u16 dmalen; 4542be7d22fSVladimir Kondratiev u8 ftype; 4555bd60982SLior David int cid, mid; 4563b282bc6SVladimir Kondratiev int i; 457c8b78b5fSVladimir Kondratiev struct wil_net_stats *stats; 458c8b78b5fSVladimir Kondratiev 459bf0353a6SAhmad Masri BUILD_BUG_ON(sizeof(struct skb_rx_info) > sizeof(skb->cb)); 46033e61169SVladimir Kondratiev 4613b282bc6SVladimir Kondratiev again: 46210590c6aSGidon Studinski if (unlikely(wil_ring_is_empty(vring))) 4632be7d22fSVladimir Kondratiev return NULL; 4642be7d22fSVladimir Kondratiev 4653b282bc6SVladimir Kondratiev i = (int)vring->swhead; 46610590c6aSGidon Studinski _d = &vring->va[i].rx.legacy; 46733c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & RX_DMA_STATUS_DU))) { 4682be7d22fSVladimir Kondratiev /* it is not error, we just reached end of Rx done area */ 4692be7d22fSVladimir Kondratiev return NULL; 4702be7d22fSVladimir Kondratiev } 4712be7d22fSVladimir Kondratiev 472148416a9SVladimir Kondratiev skb = vring->ctx[i].skb; 473148416a9SVladimir Kondratiev vring->ctx[i].skb = NULL; 47410590c6aSGidon Studinski wil_ring_advance_head(vring, 1); 475148416a9SVladimir Kondratiev if (!skb) { 476148416a9SVladimir Kondratiev wil_err(wil, "No Rx skb at [%d]\n", i); 4773b282bc6SVladimir Kondratiev goto again; 478148416a9SVladimir Kondratiev } 47968ada71eSVladimir Kondratiev d = wil_skb_rxdesc(skb); 48068ada71eSVladimir Kondratiev *d = *_d; 48168ada71eSVladimir Kondratiev pa = wil_desc_addr(&d->dma.addr); 48268ada71eSVladimir Kondratiev 48368ada71eSVladimir Kondratiev dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); 48468ada71eSVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 48568ada71eSVladimir Kondratiev 486148416a9SVladimir Kondratiev trace_wil6210_rx(i, d); 487148416a9SVladimir Kondratiev wil_dbg_txrx(wil, "Rx[%3d] : %d bytes\n", i, dmalen); 488a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 48968ada71eSVladimir Kondratiev (const void *)d, sizeof(*d), false); 49068ada71eSVladimir Kondratiev 4915bd60982SLior David mid = wil_rxdesc_mid(d); 4925bd60982SLior David vif = wil->vifs[mid]; 4935bd60982SLior David 4945bd60982SLior David if (unlikely(!vif)) { 4955bd60982SLior David wil_dbg_txrx(wil, "skipped RX descriptor with invalid mid %d", 4965bd60982SLior David mid); 4975bd60982SLior David kfree_skb(skb); 4985bd60982SLior David goto again; 4995bd60982SLior David } 5005bd60982SLior David ndev = vif_to_ndev(vif); 50133c477fdSVladimir Kondratiev if (unlikely(dmalen > sz)) { 502bf0353a6SAhmad Masri wil_err_ratelimited(wil, "Rx size too large: %d bytes!\n", 503bf0353a6SAhmad Masri dmalen); 504110dea00SWei Yongjun kfree_skb(skb); 5053b282bc6SVladimir Kondratiev goto again; 506e270045bSVladimir Kondratiev } 5077e594444SVladimir Kondratiev skb_trim(skb, dmalen); 50833e61169SVladimir Kondratiev 5091cbbcb08SVladimir Kondratiev prefetch(skb->data); 5101cbbcb08SVladimir Kondratiev 511c0d37713SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 512c0d37713SVladimir Kondratiev skb->data, skb_headlen(skb), false); 513c0d37713SVladimir Kondratiev 514bf0353a6SAhmad Masri cid = wil_rx_get_cid_by_skb(wil, skb); 515bf0353a6SAhmad Masri if (cid == -ENOENT) { 516bf0353a6SAhmad Masri kfree_skb(skb); 517bf0353a6SAhmad Masri goto again; 518bf0353a6SAhmad Masri } 519bf0353a6SAhmad Masri wil_skb_set_cid(skb, (u8)cid); 520bf0353a6SAhmad Masri stats = &wil->sta[cid].stats; 521bf0353a6SAhmad Masri 522c8b78b5fSVladimir Kondratiev stats->last_mcs_rx = wil_rxdesc_mcs(d); 523c4a110d8SVladimir Kondratiev if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) 524c4a110d8SVladimir Kondratiev stats->rx_per_mcs[stats->last_mcs_rx]++; 5252be7d22fSVladimir Kondratiev 5262be7d22fSVladimir Kondratiev /* use radiotap header only if required */ 5272be7d22fSVladimir Kondratiev if (ndev->type == ARPHRD_IEEE80211_RADIOTAP) 52833e61169SVladimir Kondratiev wil_rx_add_radiotap_header(wil, skb); 5292be7d22fSVladimir Kondratiev 5302be7d22fSVladimir Kondratiev /* no extra checks if in sniffer mode */ 5312be7d22fSVladimir Kondratiev if (ndev->type != ARPHRD_ETHER) 5322be7d22fSVladimir Kondratiev return skb; 533a8313341SVladimir Kondratiev /* Non-data frames may be delivered through Rx DMA channel (ex: BAR) 5342be7d22fSVladimir Kondratiev * Driver should recognize it by frame type, that is found 5352be7d22fSVladimir Kondratiev * in Rx descriptor. If type is not data, it is 802.11 frame as is 5362be7d22fSVladimir Kondratiev */ 53768ada71eSVladimir Kondratiev ftype = wil_rxdesc_ftype(d) << 2; 53833c477fdSVladimir Kondratiev if (unlikely(ftype != IEEE80211_FTYPE_DATA)) { 539a8313341SVladimir Kondratiev u8 fc1 = wil_rxdesc_fc1(d); 540a8313341SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 541a8313341SVladimir Kondratiev u16 seq = wil_rxdesc_seq(d); 542a8313341SVladimir Kondratiev 543a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 544a8313341SVladimir Kondratiev "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 545a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 5463b282bc6SVladimir Kondratiev stats->rx_non_data_frame++; 547a8313341SVladimir Kondratiev if (wil_is_back_req(fc1)) { 548a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 549a8313341SVladimir Kondratiev "BAR: MID %d CID %d TID %d Seq 0x%03x\n", 550a8313341SVladimir Kondratiev mid, cid, tid, seq); 5515bd60982SLior David wil_rx_bar(wil, vif, cid, tid, seq); 552a8313341SVladimir Kondratiev } else { 553a8313341SVladimir Kondratiev /* print again all info. One can enable only this 554a8313341SVladimir Kondratiev * without overhead for printing every Rx frame 555a8313341SVladimir Kondratiev */ 556a8313341SVladimir Kondratiev wil_dbg_txrx(wil, 557a8313341SVladimir Kondratiev "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", 558a8313341SVladimir Kondratiev fc1, mid, cid, tid, seq); 559a8313341SVladimir Kondratiev wil_hex_dump_txrx("RxD ", DUMP_PREFIX_NONE, 32, 4, 560a8313341SVladimir Kondratiev (const void *)d, sizeof(*d), false); 561a8313341SVladimir Kondratiev wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, 562a8313341SVladimir Kondratiev skb->data, skb_headlen(skb), false); 563a8313341SVladimir Kondratiev } 5642be7d22fSVladimir Kondratiev kfree_skb(skb); 5653b282bc6SVladimir Kondratiev goto again; 5662be7d22fSVladimir Kondratiev } 5672be7d22fSVladimir Kondratiev 568504937d4SKirshenbaum Erez /* L4 IDENT is on when HW calculated checksum, check status 569504937d4SKirshenbaum Erez * and in case of error drop the packet 570504937d4SKirshenbaum Erez * higher stack layers will handle retransmission (if required) 571504937d4SKirshenbaum Erez */ 57233c477fdSVladimir Kondratiev if (likely(d->dma.status & RX_DMA_STATUS_L4I)) { 573504937d4SKirshenbaum Erez /* L4 protocol identified, csum calculated */ 57433c477fdSVladimir Kondratiev if (likely((d->dma.error & RX_DMA_ERROR_L4_ERR) == 0)) 575504937d4SKirshenbaum Erez skb->ip_summed = CHECKSUM_UNNECESSARY; 5764a68ab10SVladimir Kondratiev /* If HW reports bad checksum, let IP stack re-check it 5774a68ab10SVladimir Kondratiev * For example, HW don't understand Microsoft IP stack that 5784a68ab10SVladimir Kondratiev * mis-calculates TCP checksum - if it should be 0x0, 5794a68ab10SVladimir Kondratiev * it writes 0xffff in violation of RFC 1624 5804a68ab10SVladimir Kondratiev */ 5810b853210SMaya Erez else 5820b853210SMaya Erez stats->rx_csum_err++; 583504937d4SKirshenbaum Erez } 584504937d4SKirshenbaum Erez 585c406ea7cSVladimir Kondratiev if (snaplen) { 586c406ea7cSVladimir Kondratiev /* Packet layout 587c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 588c406ea7cSVladimir Kondratiev * | SA(6) | DA(6) | SNAP(6) | ETHTYPE(2) | DATA | 589c406ea7cSVladimir Kondratiev * +-------+-------+---------+------------+------+ 590c406ea7cSVladimir Kondratiev * Need to remove SNAP, shifting SA and DA forward 591c406ea7cSVladimir Kondratiev */ 592c406ea7cSVladimir Kondratiev memmove(skb->data + snaplen, skb->data, 2 * ETH_ALEN); 593c406ea7cSVladimir Kondratiev skb_pull(skb, snaplen); 594c406ea7cSVladimir Kondratiev } 595c406ea7cSVladimir Kondratiev 5962be7d22fSVladimir Kondratiev return skb; 5972be7d22fSVladimir Kondratiev } 5982be7d22fSVladimir Kondratiev 5992be7d22fSVladimir Kondratiev /** 6002be7d22fSVladimir Kondratiev * allocate and fill up to @count buffers in rx ring 6012be7d22fSVladimir Kondratiev * buffers posted at @swtail 6025bd60982SLior David * Note: we have a single RX queue for servicing all VIFs, but we 6035bd60982SLior David * allocate skbs with headroom according to main interface only. This 6045bd60982SLior David * means it will not work with monitor interface together with other VIFs. 6055bd60982SLior David * Currently we only support monitor interface on its own without other VIFs, 6065bd60982SLior David * and we will need to fix this code once we add support. 6072be7d22fSVladimir Kondratiev */ 6082be7d22fSVladimir Kondratiev static int wil_rx_refill(struct wil6210_priv *wil, int count) 6092be7d22fSVladimir Kondratiev { 610e00243faSLior David struct net_device *ndev = wil->main_ndev; 61110590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 6122be7d22fSVladimir Kondratiev u32 next_tail; 6132be7d22fSVladimir Kondratiev int rc = 0; 6142be7d22fSVladimir Kondratiev int headroom = ndev->type == ARPHRD_IEEE80211_RADIOTAP ? 6152be7d22fSVladimir Kondratiev WIL6210_RTAP_SIZE : 0; 6162be7d22fSVladimir Kondratiev 61710590c6aSGidon Studinski for (; next_tail = wil_ring_next_tail(v), 6182be7d22fSVladimir Kondratiev (next_tail != v->swhead) && (count-- > 0); 6192be7d22fSVladimir Kondratiev v->swtail = next_tail) { 6202be7d22fSVladimir Kondratiev rc = wil_vring_alloc_skb(wil, v, v->swtail, headroom); 62133c477fdSVladimir Kondratiev if (unlikely(rc)) { 6223d6b7272SDedy Lansky wil_err_ratelimited(wil, "Error %d in rx refill[%d]\n", 6232be7d22fSVladimir Kondratiev rc, v->swtail); 6242be7d22fSVladimir Kondratiev break; 6252be7d22fSVladimir Kondratiev } 6262be7d22fSVladimir Kondratiev } 627ab6d7cc3SMaya Erez 628ab6d7cc3SMaya Erez /* make sure all writes to descriptors (shared memory) are done before 629ab6d7cc3SMaya Erez * committing them to HW 630ab6d7cc3SMaya Erez */ 631ab6d7cc3SMaya Erez wmb(); 632ab6d7cc3SMaya Erez 633b9eeb512SVladimir Kondratiev wil_w(wil, v->hwtail, v->swtail); 6342be7d22fSVladimir Kondratiev 6352be7d22fSVladimir Kondratiev return rc; 6362be7d22fSVladimir Kondratiev } 6372be7d22fSVladimir Kondratiev 63858527421SVladimir Kondratiev /** 63958527421SVladimir Kondratiev * reverse_memcmp - Compare two areas of memory, in reverse order 64058527421SVladimir Kondratiev * @cs: One area of memory 64158527421SVladimir Kondratiev * @ct: Another area of memory 64258527421SVladimir Kondratiev * @count: The size of the area. 64358527421SVladimir Kondratiev * 64458527421SVladimir Kondratiev * Cut'n'paste from original memcmp (see lib/string.c) 64558527421SVladimir Kondratiev * with minimal modifications 64658527421SVladimir Kondratiev */ 6477be13fc3SGidon Studinski int reverse_memcmp(const void *cs, const void *ct, size_t count) 64858527421SVladimir Kondratiev { 64958527421SVladimir Kondratiev const unsigned char *su1, *su2; 65058527421SVladimir Kondratiev int res = 0; 65158527421SVladimir Kondratiev 65258527421SVladimir Kondratiev for (su1 = cs + count - 1, su2 = ct + count - 1; count > 0; 65358527421SVladimir Kondratiev --su1, --su2, count--) { 65458527421SVladimir Kondratiev res = *su1 - *su2; 65558527421SVladimir Kondratiev if (res) 65658527421SVladimir Kondratiev break; 65758527421SVladimir Kondratiev } 65858527421SVladimir Kondratiev return res; 65958527421SVladimir Kondratiev } 66058527421SVladimir Kondratiev 66158527421SVladimir Kondratiev static int wil_rx_crypto_check(struct wil6210_priv *wil, struct sk_buff *skb) 66258527421SVladimir Kondratiev { 66358527421SVladimir Kondratiev struct vring_rx_desc *d = wil_skb_rxdesc(skb); 664bf0353a6SAhmad Masri int cid = wil_skb_get_cid(skb); 66558527421SVladimir Kondratiev int tid = wil_rxdesc_tid(d); 66658527421SVladimir Kondratiev int key_id = wil_rxdesc_key_id(d); 66758527421SVladimir Kondratiev int mc = wil_rxdesc_mcast(d); 66858527421SVladimir Kondratiev struct wil_sta_info *s = &wil->sta[cid]; 66958527421SVladimir Kondratiev struct wil_tid_crypto_rx *c = mc ? &s->group_crypto_rx : 67058527421SVladimir Kondratiev &s->tid_crypto_rx[tid]; 67158527421SVladimir Kondratiev struct wil_tid_crypto_rx_single *cc = &c->key_id[key_id]; 67258527421SVladimir Kondratiev const u8 *pn = (u8 *)&d->mac.pn_15_0; 67358527421SVladimir Kondratiev 67458527421SVladimir Kondratiev if (!cc->key_set) { 67558527421SVladimir Kondratiev wil_err_ratelimited(wil, 67658527421SVladimir Kondratiev "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", 67758527421SVladimir Kondratiev cid, tid, mc, key_id); 67858527421SVladimir Kondratiev return -EINVAL; 67958527421SVladimir Kondratiev } 68058527421SVladimir Kondratiev 68158527421SVladimir Kondratiev if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { 68258527421SVladimir Kondratiev wil_err_ratelimited(wil, 68358527421SVladimir Kondratiev "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", 68458527421SVladimir Kondratiev cid, tid, mc, key_id, pn, cc->pn); 68558527421SVladimir Kondratiev return -EINVAL; 68658527421SVladimir Kondratiev } 68758527421SVladimir Kondratiev memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); 68858527421SVladimir Kondratiev 68958527421SVladimir Kondratiev return 0; 69058527421SVladimir Kondratiev } 69158527421SVladimir Kondratiev 692e15af41cSDedy Lansky static int wil_rx_error_check(struct wil6210_priv *wil, struct sk_buff *skb, 693e15af41cSDedy Lansky struct wil_net_stats *stats) 694e15af41cSDedy Lansky { 695e15af41cSDedy Lansky struct vring_rx_desc *d = wil_skb_rxdesc(skb); 696e15af41cSDedy Lansky 697e15af41cSDedy Lansky if ((d->dma.status & RX_DMA_STATUS_ERROR) && 698e15af41cSDedy Lansky (d->dma.error & RX_DMA_ERROR_MIC)) { 699e15af41cSDedy Lansky stats->rx_mic_error++; 700e15af41cSDedy Lansky wil_dbg_txrx(wil, "MIC error, dropping packet\n"); 701e15af41cSDedy Lansky return -EFAULT; 702e15af41cSDedy Lansky } 703e15af41cSDedy Lansky 704e15af41cSDedy Lansky return 0; 705e15af41cSDedy Lansky } 706e15af41cSDedy Lansky 7077be13fc3SGidon Studinski static void wil_get_netif_rx_params(struct sk_buff *skb, int *cid, 7087be13fc3SGidon Studinski int *security) 7097be13fc3SGidon Studinski { 7107be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 7117be13fc3SGidon Studinski 712bf0353a6SAhmad Masri *cid = wil_skb_get_cid(skb); 7137be13fc3SGidon Studinski *security = wil_rxdesc_security(d); 7147be13fc3SGidon Studinski } 7157be13fc3SGidon Studinski 7162be7d22fSVladimir Kondratiev /* 71742fe1e51SAhmad Masri * Check if skb is ptk eapol key message 71842fe1e51SAhmad Masri * 71942fe1e51SAhmad Masri * returns a pointer to the start of the eapol key structure, NULL 72042fe1e51SAhmad Masri * if frame is not PTK eapol key 72142fe1e51SAhmad Masri */ 72242fe1e51SAhmad Masri static struct wil_eapol_key *wil_is_ptk_eapol_key(struct wil6210_priv *wil, 72342fe1e51SAhmad Masri struct sk_buff *skb) 72442fe1e51SAhmad Masri { 72542fe1e51SAhmad Masri u8 *buf; 72642fe1e51SAhmad Masri const struct wil_1x_hdr *hdr; 72742fe1e51SAhmad Masri struct wil_eapol_key *key; 72842fe1e51SAhmad Masri u16 key_info; 72942fe1e51SAhmad Masri int len = skb->len; 73042fe1e51SAhmad Masri 73142fe1e51SAhmad Masri if (!skb_mac_header_was_set(skb)) { 73242fe1e51SAhmad Masri wil_err(wil, "mac header was not set\n"); 73342fe1e51SAhmad Masri return NULL; 73442fe1e51SAhmad Masri } 73542fe1e51SAhmad Masri 73642fe1e51SAhmad Masri len -= skb_mac_offset(skb); 73742fe1e51SAhmad Masri 73842fe1e51SAhmad Masri if (len < sizeof(struct ethhdr) + sizeof(struct wil_1x_hdr) + 73942fe1e51SAhmad Masri sizeof(struct wil_eapol_key)) 74042fe1e51SAhmad Masri return NULL; 74142fe1e51SAhmad Masri 74242fe1e51SAhmad Masri buf = skb_mac_header(skb) + sizeof(struct ethhdr); 74342fe1e51SAhmad Masri 74442fe1e51SAhmad Masri hdr = (const struct wil_1x_hdr *)buf; 74542fe1e51SAhmad Masri if (hdr->type != WIL_1X_TYPE_EAPOL_KEY) 74642fe1e51SAhmad Masri return NULL; 74742fe1e51SAhmad Masri 74842fe1e51SAhmad Masri key = (struct wil_eapol_key *)(buf + sizeof(struct wil_1x_hdr)); 74942fe1e51SAhmad Masri if (key->type != WIL_EAPOL_KEY_TYPE_WPA && 75042fe1e51SAhmad Masri key->type != WIL_EAPOL_KEY_TYPE_RSN) 75142fe1e51SAhmad Masri return NULL; 75242fe1e51SAhmad Masri 75342fe1e51SAhmad Masri key_info = be16_to_cpu(key->key_info); 75442fe1e51SAhmad Masri if (!(key_info & WIL_KEY_INFO_KEY_TYPE)) /* check if pairwise */ 75542fe1e51SAhmad Masri return NULL; 75642fe1e51SAhmad Masri 75742fe1e51SAhmad Masri return key; 75842fe1e51SAhmad Masri } 75942fe1e51SAhmad Masri 76042fe1e51SAhmad Masri static bool wil_skb_is_eap_3(struct wil6210_priv *wil, struct sk_buff *skb) 76142fe1e51SAhmad Masri { 76242fe1e51SAhmad Masri struct wil_eapol_key *key; 76342fe1e51SAhmad Masri u16 key_info; 76442fe1e51SAhmad Masri 76542fe1e51SAhmad Masri key = wil_is_ptk_eapol_key(wil, skb); 76642fe1e51SAhmad Masri if (!key) 76742fe1e51SAhmad Masri return false; 76842fe1e51SAhmad Masri 76942fe1e51SAhmad Masri key_info = be16_to_cpu(key->key_info); 77042fe1e51SAhmad Masri if (key_info & (WIL_KEY_INFO_MIC | 77142fe1e51SAhmad Masri WIL_KEY_INFO_ENCR_KEY_DATA)) { 77242fe1e51SAhmad Masri /* 3/4 of 4-Way Handshake */ 77342fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 3\n"); 77442fe1e51SAhmad Masri return true; 77542fe1e51SAhmad Masri } 77642fe1e51SAhmad Masri /* 1/4 of 4-Way Handshake */ 77742fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 1\n"); 77842fe1e51SAhmad Masri 77942fe1e51SAhmad Masri return false; 78042fe1e51SAhmad Masri } 78142fe1e51SAhmad Masri 78242fe1e51SAhmad Masri static bool wil_skb_is_eap_4(struct wil6210_priv *wil, struct sk_buff *skb) 78342fe1e51SAhmad Masri { 78442fe1e51SAhmad Masri struct wil_eapol_key *key; 78542fe1e51SAhmad Masri u32 *nonce, i; 78642fe1e51SAhmad Masri 78742fe1e51SAhmad Masri key = wil_is_ptk_eapol_key(wil, skb); 78842fe1e51SAhmad Masri if (!key) 78942fe1e51SAhmad Masri return false; 79042fe1e51SAhmad Masri 79142fe1e51SAhmad Masri nonce = (u32 *)key->key_nonce; 79242fe1e51SAhmad Masri for (i = 0; i < WIL_EAP_NONCE_LEN / sizeof(u32); i++, nonce++) { 79342fe1e51SAhmad Masri if (*nonce != 0) { 79442fe1e51SAhmad Masri /* message 2/4 */ 79542fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 2\n"); 79642fe1e51SAhmad Masri return false; 79742fe1e51SAhmad Masri } 79842fe1e51SAhmad Masri } 79942fe1e51SAhmad Masri wil_dbg_misc(wil, "EAPOL key message 4\n"); 80042fe1e51SAhmad Masri 80142fe1e51SAhmad Masri return true; 80242fe1e51SAhmad Masri } 80342fe1e51SAhmad Masri 80442fe1e51SAhmad Masri void wil_enable_tx_key_worker(struct work_struct *work) 80542fe1e51SAhmad Masri { 80642fe1e51SAhmad Masri struct wil6210_vif *vif = container_of(work, 80742fe1e51SAhmad Masri struct wil6210_vif, enable_tx_key_worker); 80842fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 80942fe1e51SAhmad Masri int rc, cid; 81042fe1e51SAhmad Masri 81142fe1e51SAhmad Masri rtnl_lock(); 81242fe1e51SAhmad Masri if (vif->ptk_rekey_state != WIL_REKEY_WAIT_M4_SENT) { 81342fe1e51SAhmad Masri wil_dbg_misc(wil, "Invalid rekey state = %d\n", 81442fe1e51SAhmad Masri vif->ptk_rekey_state); 81542fe1e51SAhmad Masri rtnl_unlock(); 81642fe1e51SAhmad Masri return; 81742fe1e51SAhmad Masri } 81842fe1e51SAhmad Masri 81942fe1e51SAhmad Masri cid = wil_find_cid_by_idx(wil, vif->mid, 0); 82042fe1e51SAhmad Masri if (!wil_cid_valid(wil, cid)) { 82142fe1e51SAhmad Masri wil_err(wil, "Invalid cid = %d\n", cid); 82242fe1e51SAhmad Masri rtnl_unlock(); 82342fe1e51SAhmad Masri return; 82442fe1e51SAhmad Masri } 82542fe1e51SAhmad Masri 82642fe1e51SAhmad Masri wil_dbg_misc(wil, "Apply PTK key after eapol was sent out\n"); 82742fe1e51SAhmad Masri rc = wmi_add_cipher_key(vif, 0, wil->sta[cid].addr, 0, NULL, 82842fe1e51SAhmad Masri WMI_KEY_USE_APPLY_PTK); 82942fe1e51SAhmad Masri 83042fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_IDLE; 83142fe1e51SAhmad Masri rtnl_unlock(); 83242fe1e51SAhmad Masri 83342fe1e51SAhmad Masri if (rc) 83442fe1e51SAhmad Masri wil_err(wil, "Apply PTK key failed %d\n", rc); 83542fe1e51SAhmad Masri } 83642fe1e51SAhmad Masri 83742fe1e51SAhmad Masri void wil_tx_complete_handle_eapol(struct wil6210_vif *vif, struct sk_buff *skb) 83842fe1e51SAhmad Masri { 83942fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 84042fe1e51SAhmad Masri struct wireless_dev *wdev = vif_to_wdev(vif); 84142fe1e51SAhmad Masri bool q = false; 84242fe1e51SAhmad Masri 84342fe1e51SAhmad Masri if (wdev->iftype != NL80211_IFTYPE_STATION || 84442fe1e51SAhmad Masri !test_bit(WMI_FW_CAPABILITY_SPLIT_REKEY, wil->fw_capabilities)) 84542fe1e51SAhmad Masri return; 84642fe1e51SAhmad Masri 84742fe1e51SAhmad Masri /* check if skb is an EAP message 4/4 */ 84842fe1e51SAhmad Masri if (!wil_skb_is_eap_4(wil, skb)) 84942fe1e51SAhmad Masri return; 85042fe1e51SAhmad Masri 85142fe1e51SAhmad Masri spin_lock_bh(&wil->eap_lock); 85242fe1e51SAhmad Masri switch (vif->ptk_rekey_state) { 85342fe1e51SAhmad Masri case WIL_REKEY_IDLE: 85442fe1e51SAhmad Masri /* ignore idle state, can happen due to M4 retransmission */ 85542fe1e51SAhmad Masri break; 85642fe1e51SAhmad Masri case WIL_REKEY_M3_RECEIVED: 85742fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_IDLE; 85842fe1e51SAhmad Masri break; 85942fe1e51SAhmad Masri case WIL_REKEY_WAIT_M4_SENT: 86042fe1e51SAhmad Masri q = true; 86142fe1e51SAhmad Masri break; 86242fe1e51SAhmad Masri default: 86342fe1e51SAhmad Masri wil_err(wil, "Unknown rekey state = %d", 86442fe1e51SAhmad Masri vif->ptk_rekey_state); 86542fe1e51SAhmad Masri } 86642fe1e51SAhmad Masri spin_unlock_bh(&wil->eap_lock); 86742fe1e51SAhmad Masri 86842fe1e51SAhmad Masri if (q) { 86942fe1e51SAhmad Masri q = queue_work(wil->wmi_wq, &vif->enable_tx_key_worker); 87042fe1e51SAhmad Masri wil_dbg_misc(wil, "queue_work of enable_tx_key_worker -> %d\n", 87142fe1e51SAhmad Masri q); 87242fe1e51SAhmad Masri } 87342fe1e51SAhmad Masri } 87442fe1e51SAhmad Masri 87542fe1e51SAhmad Masri static void wil_rx_handle_eapol(struct wil6210_vif *vif, struct sk_buff *skb) 87642fe1e51SAhmad Masri { 87742fe1e51SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 87842fe1e51SAhmad Masri struct wireless_dev *wdev = vif_to_wdev(vif); 87942fe1e51SAhmad Masri 88042fe1e51SAhmad Masri if (wdev->iftype != NL80211_IFTYPE_STATION || 88142fe1e51SAhmad Masri !test_bit(WMI_FW_CAPABILITY_SPLIT_REKEY, wil->fw_capabilities)) 88242fe1e51SAhmad Masri return; 88342fe1e51SAhmad Masri 88442fe1e51SAhmad Masri /* check if skb is a EAP message 3/4 */ 88542fe1e51SAhmad Masri if (!wil_skb_is_eap_3(wil, skb)) 88642fe1e51SAhmad Masri return; 88742fe1e51SAhmad Masri 88842fe1e51SAhmad Masri if (vif->ptk_rekey_state == WIL_REKEY_IDLE) 88942fe1e51SAhmad Masri vif->ptk_rekey_state = WIL_REKEY_M3_RECEIVED; 89042fe1e51SAhmad Masri } 89142fe1e51SAhmad Masri 89242fe1e51SAhmad Masri /* 8932be7d22fSVladimir Kondratiev * Pass Rx packet to the netif. Update statistics. 894e0287c4aSVladimir Kondratiev * Called in softirq context (NAPI poll). 8952be7d22fSVladimir Kondratiev */ 896f99fe49fSDedy Lansky void wil_netif_rx(struct sk_buff *skb, struct net_device *ndev, int cid, 897f99fe49fSDedy Lansky struct wil_net_stats *stats, bool gro) 8982be7d22fSVladimir Kondratiev { 899c42da999SVladimir Kondratiev gro_result_t rc = GRO_NORMAL; 900e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 901c8b78b5fSVladimir Kondratiev struct wil6210_priv *wil = ndev_to_wil(ndev); 902e00243faSLior David struct wireless_dev *wdev = vif_to_wdev(vif); 9032be7d22fSVladimir Kondratiev unsigned int len = skb->len; 9046d1ba32cSAhmad Masri u8 *sa, *da = wil_skb_get_da(skb); 905c42da999SVladimir Kondratiev /* here looking for DA, not A1, thus Rxdesc's 'mcast' indication 906c42da999SVladimir Kondratiev * is not suitable, need to look at data 907c42da999SVladimir Kondratiev */ 9086d1ba32cSAhmad Masri int mcast = is_multicast_ether_addr(da); 909c42da999SVladimir Kondratiev struct sk_buff *xmit_skb = NULL; 910c42da999SVladimir Kondratiev static const char * const gro_res_str[] = { 911c42da999SVladimir Kondratiev [GRO_MERGED] = "GRO_MERGED", 912c42da999SVladimir Kondratiev [GRO_MERGED_FREE] = "GRO_MERGED_FREE", 913c42da999SVladimir Kondratiev [GRO_HELD] = "GRO_HELD", 914c42da999SVladimir Kondratiev [GRO_NORMAL] = "GRO_NORMAL", 915c42da999SVladimir Kondratiev [GRO_DROP] = "GRO_DROP", 916bfabdd69SGustavo A. R. Silva [GRO_CONSUMED] = "GRO_CONSUMED", 917c42da999SVladimir Kondratiev }; 9182be7d22fSVladimir Kondratiev 9199a65064aSDedy Lansky if (wdev->iftype == NL80211_IFTYPE_STATION) { 9206d1ba32cSAhmad Masri sa = wil_skb_get_sa(skb); 9216d1ba32cSAhmad Masri if (mcast && ether_addr_equal(sa, ndev->dev_addr)) { 9229a65064aSDedy Lansky /* mcast packet looped back to us */ 9239a65064aSDedy Lansky rc = GRO_DROP; 9249a65064aSDedy Lansky dev_kfree_skb(skb); 9259a65064aSDedy Lansky goto stats; 9269a65064aSDedy Lansky } 9279a65064aSDedy Lansky } else if (wdev->iftype == NL80211_IFTYPE_AP && !vif->ap_isolate) { 928c42da999SVladimir Kondratiev if (mcast) { 929c42da999SVladimir Kondratiev /* send multicast frames both to higher layers in 930c42da999SVladimir Kondratiev * local net stack and back to the wireless medium 931c42da999SVladimir Kondratiev */ 932c42da999SVladimir Kondratiev xmit_skb = skb_copy(skb, GFP_ATOMIC); 933c42da999SVladimir Kondratiev } else { 9346d1ba32cSAhmad Masri int xmit_cid = wil_find_cid(wil, vif->mid, da); 9352be7d22fSVladimir Kondratiev 936c42da999SVladimir Kondratiev if (xmit_cid >= 0) { 937c42da999SVladimir Kondratiev /* The destination station is associated to 938c42da999SVladimir Kondratiev * this AP (in this VLAN), so send the frame 939c42da999SVladimir Kondratiev * directly to it and do not pass it to local 940c42da999SVladimir Kondratiev * net stack. 941c42da999SVladimir Kondratiev */ 942c42da999SVladimir Kondratiev xmit_skb = skb; 943c42da999SVladimir Kondratiev skb = NULL; 944c42da999SVladimir Kondratiev } 945c42da999SVladimir Kondratiev } 946c42da999SVladimir Kondratiev } 947c42da999SVladimir Kondratiev if (xmit_skb) { 948c42da999SVladimir Kondratiev /* Send to wireless media and increase priority by 256 to 949c42da999SVladimir Kondratiev * keep the received priority instead of reclassifying 950c42da999SVladimir Kondratiev * the frame (see cfg80211_classify8021d). 951c42da999SVladimir Kondratiev */ 952c42da999SVladimir Kondratiev xmit_skb->dev = ndev; 953c42da999SVladimir Kondratiev xmit_skb->priority += 256; 954c42da999SVladimir Kondratiev xmit_skb->protocol = htons(ETH_P_802_3); 955c42da999SVladimir Kondratiev skb_reset_network_header(xmit_skb); 956c42da999SVladimir Kondratiev skb_reset_mac_header(xmit_skb); 957c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx -> Tx %d bytes\n", len); 958c42da999SVladimir Kondratiev dev_queue_xmit(xmit_skb); 959c42da999SVladimir Kondratiev } 960c42da999SVladimir Kondratiev 961c42da999SVladimir Kondratiev if (skb) { /* deliver to local stack */ 962c42da999SVladimir Kondratiev skb->protocol = eth_type_trans(skb, ndev); 9635bd60982SLior David skb->dev = ndev; 96442fe1e51SAhmad Masri 96542fe1e51SAhmad Masri if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 96642fe1e51SAhmad Masri wil_rx_handle_eapol(vif, skb); 96742fe1e51SAhmad Masri 968f99fe49fSDedy Lansky if (gro) 969c42da999SVladimir Kondratiev rc = napi_gro_receive(&wil->napi_rx, skb); 970f99fe49fSDedy Lansky else 971f99fe49fSDedy Lansky netif_rx_ni(skb); 972c42da999SVladimir Kondratiev wil_dbg_txrx(wil, "Rx complete %d bytes => %s\n", 973c42da999SVladimir Kondratiev len, gro_res_str[rc]); 974c42da999SVladimir Kondratiev } 97558527421SVladimir Kondratiev stats: 976c42da999SVladimir Kondratiev /* statistics. rc set to GRO_NORMAL for AP bridging */ 977b5998e6aSVladimir Kondratiev if (unlikely(rc == GRO_DROP)) { 978b5998e6aSVladimir Kondratiev ndev->stats.rx_dropped++; 979b5998e6aSVladimir Kondratiev stats->rx_dropped++; 980b5998e6aSVladimir Kondratiev wil_dbg_txrx(wil, "Rx drop %d bytes\n", len); 981b5998e6aSVladimir Kondratiev } else { 9822be7d22fSVladimir Kondratiev ndev->stats.rx_packets++; 983c8b78b5fSVladimir Kondratiev stats->rx_packets++; 9842be7d22fSVladimir Kondratiev ndev->stats.rx_bytes += len; 985c8b78b5fSVladimir Kondratiev stats->rx_bytes += len; 986c42da999SVladimir Kondratiev if (mcast) 987c42da999SVladimir Kondratiev ndev->stats.multicast++; 988194b482bSVladimir Kondratiev } 9892be7d22fSVladimir Kondratiev } 9902be7d22fSVladimir Kondratiev 991f99fe49fSDedy Lansky void wil_netif_rx_any(struct sk_buff *skb, struct net_device *ndev) 992f99fe49fSDedy Lansky { 993f99fe49fSDedy Lansky int cid, security; 994f99fe49fSDedy Lansky struct wil6210_priv *wil = ndev_to_wil(ndev); 995f99fe49fSDedy Lansky struct wil_net_stats *stats; 996f99fe49fSDedy Lansky 997f99fe49fSDedy Lansky wil->txrx_ops.get_netif_rx_params(skb, &cid, &security); 998f99fe49fSDedy Lansky 999f99fe49fSDedy Lansky stats = &wil->sta[cid].stats; 1000f99fe49fSDedy Lansky 1001f99fe49fSDedy Lansky skb_orphan(skb); 1002f99fe49fSDedy Lansky 1003f99fe49fSDedy Lansky if (security && (wil->txrx_ops.rx_crypto_check(wil, skb) != 0)) { 10042b481835SDan Carpenter wil_dbg_txrx(wil, "Rx drop %d bytes\n", skb->len); 1005f99fe49fSDedy Lansky dev_kfree_skb(skb); 1006f99fe49fSDedy Lansky ndev->stats.rx_dropped++; 1007f99fe49fSDedy Lansky stats->rx_replay++; 1008f99fe49fSDedy Lansky stats->rx_dropped++; 1009f99fe49fSDedy Lansky return; 1010f99fe49fSDedy Lansky } 1011f99fe49fSDedy Lansky 1012f99fe49fSDedy Lansky /* check errors reported by HW and update statistics */ 1013f99fe49fSDedy Lansky if (unlikely(wil->txrx_ops.rx_error_check(wil, skb, stats))) { 1014f99fe49fSDedy Lansky dev_kfree_skb(skb); 1015f99fe49fSDedy Lansky return; 1016f99fe49fSDedy Lansky } 1017f99fe49fSDedy Lansky 1018f99fe49fSDedy Lansky wil_netif_rx(skb, ndev, cid, stats, true); 1019f99fe49fSDedy Lansky } 1020f99fe49fSDedy Lansky 10212be7d22fSVladimir Kondratiev /** 10222be7d22fSVladimir Kondratiev * Proceed all completed skb's from Rx VRING 10232be7d22fSVladimir Kondratiev * 1024e0287c4aSVladimir Kondratiev * Safe to call from NAPI poll, i.e. softirq with interrupts enabled 10252be7d22fSVladimir Kondratiev */ 1026e0287c4aSVladimir Kondratiev void wil_rx_handle(struct wil6210_priv *wil, int *quota) 10272be7d22fSVladimir Kondratiev { 1028e00243faSLior David struct net_device *ndev = wil->main_ndev; 1029e00243faSLior David struct wireless_dev *wdev = ndev->ieee80211_ptr; 103010590c6aSGidon Studinski struct wil_ring *v = &wil->ring_rx; 10312be7d22fSVladimir Kondratiev struct sk_buff *skb; 10322be7d22fSVladimir Kondratiev 103333c477fdSVladimir Kondratiev if (unlikely(!v->va)) { 10342be7d22fSVladimir Kondratiev wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); 10352be7d22fSVladimir Kondratiev return; 10362be7d22fSVladimir Kondratiev } 1037af3db60aSLazar Alexei wil_dbg_txrx(wil, "rx_handle\n"); 1038e0287c4aSVladimir Kondratiev while ((*quota > 0) && (NULL != (skb = wil_vring_reap_rx(wil, v)))) { 1039e0287c4aSVladimir Kondratiev (*quota)--; 10402be7d22fSVladimir Kondratiev 1041e00243faSLior David /* monitor is currently supported on main interface only */ 1042e00243faSLior David if (wdev->iftype == NL80211_IFTYPE_MONITOR) { 10432be7d22fSVladimir Kondratiev skb->dev = ndev; 10442be7d22fSVladimir Kondratiev skb_reset_mac_header(skb); 10452be7d22fSVladimir Kondratiev skb->ip_summed = CHECKSUM_UNNECESSARY; 10462be7d22fSVladimir Kondratiev skb->pkt_type = PACKET_OTHERHOST; 10472be7d22fSVladimir Kondratiev skb->protocol = htons(ETH_P_802_2); 1048b4490f42SVladimir Kondratiev wil_netif_rx_any(skb, ndev); 10492be7d22fSVladimir Kondratiev } else { 1050b4490f42SVladimir Kondratiev wil_rx_reorder(wil, skb); 10512be7d22fSVladimir Kondratiev } 10522be7d22fSVladimir Kondratiev } 10532be7d22fSVladimir Kondratiev wil_rx_refill(wil, v->size); 10542be7d22fSVladimir Kondratiev } 10552be7d22fSVladimir Kondratiev 105652a45702SLior David static void wil_rx_buf_len_init(struct wil6210_priv *wil) 105752a45702SLior David { 105852a45702SLior David wil->rx_buf_len = rx_large_buf ? 105952a45702SLior David WIL_MAX_ETH_MTU : TXRX_BUF_LEN_DEFAULT - WIL_MAX_MPDU_OVERHEAD; 106052a45702SLior David if (mtu_max > wil->rx_buf_len) { 106152a45702SLior David /* do not allow RX buffers to be smaller than mtu_max, for 106252a45702SLior David * backward compatibility (mtu_max parameter was also used 106352a45702SLior David * to support receiving large packets) 106452a45702SLior David */ 106552a45702SLior David wil_info(wil, "Override RX buffer to mtu_max(%d)\n", mtu_max); 106652a45702SLior David wil->rx_buf_len = mtu_max; 106752a45702SLior David } 106852a45702SLior David } 106952a45702SLior David 107061e5ec04SDedy Lansky static int wil_rx_init(struct wil6210_priv *wil, uint order) 10712be7d22fSVladimir Kondratiev { 107210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 10732be7d22fSVladimir Kondratiev int rc; 10742be7d22fSVladimir Kondratiev 1075af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_init\n"); 10769cf10d62SVladimir Kondratiev 10778bf6adb9SVladimir Kondratiev if (vring->va) { 10788bf6adb9SVladimir Kondratiev wil_err(wil, "Rx ring already allocated\n"); 10798bf6adb9SVladimir Kondratiev return -EINVAL; 10808bf6adb9SVladimir Kondratiev } 10818bf6adb9SVladimir Kondratiev 108252a45702SLior David wil_rx_buf_len_init(wil); 108352a45702SLior David 108461e5ec04SDedy Lansky vring->size = 1 << order; 108596c93589SGidon Studinski vring->is_rx = true; 10862be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 10872be7d22fSVladimir Kondratiev if (rc) 10882be7d22fSVladimir Kondratiev return rc; 10892be7d22fSVladimir Kondratiev 109047e19af9SVladimir Kondratiev rc = wmi_rx_chain_add(wil, vring); 10912be7d22fSVladimir Kondratiev if (rc) 10922be7d22fSVladimir Kondratiev goto err_free; 10932be7d22fSVladimir Kondratiev 10942be7d22fSVladimir Kondratiev rc = wil_rx_refill(wil, vring->size); 10952be7d22fSVladimir Kondratiev if (rc) 10962be7d22fSVladimir Kondratiev goto err_free; 10972be7d22fSVladimir Kondratiev 10982be7d22fSVladimir Kondratiev return 0; 10992be7d22fSVladimir Kondratiev err_free: 110096c93589SGidon Studinski wil_vring_free(wil, vring); 11012be7d22fSVladimir Kondratiev 11022be7d22fSVladimir Kondratiev return rc; 11032be7d22fSVladimir Kondratiev } 11042be7d22fSVladimir Kondratiev 110596c93589SGidon Studinski static void wil_rx_fini(struct wil6210_priv *wil) 11062be7d22fSVladimir Kondratiev { 110710590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_rx; 11082be7d22fSVladimir Kondratiev 1109af3db60aSLazar Alexei wil_dbg_misc(wil, "rx_fini\n"); 11109cf10d62SVladimir Kondratiev 11112acb4220SVladimir Kondratiev if (vring->va) 111296c93589SGidon Studinski wil_vring_free(wil, vring); 11132be7d22fSVladimir Kondratiev } 11142be7d22fSVladimir Kondratiev 11159202d7b6SMaya Erez static int wil_tx_desc_map(union wil_tx_desc *desc, dma_addr_t pa, 11169202d7b6SMaya Erez u32 len, int vring_index) 11179202d7b6SMaya Erez { 11189202d7b6SMaya Erez struct vring_tx_desc *d = &desc->legacy; 11199202d7b6SMaya Erez 11209202d7b6SMaya Erez wil_desc_addr_set(&d->dma.addr, pa); 11219202d7b6SMaya Erez d->dma.ip_length = 0; 11229202d7b6SMaya Erez /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ 11239202d7b6SMaya Erez d->dma.b11 = 0/*14 | BIT(7)*/; 11249202d7b6SMaya Erez d->dma.error = 0; 11259202d7b6SMaya Erez d->dma.status = 0; /* BIT(0) should be 0 for HW_OWNED */ 11269202d7b6SMaya Erez d->dma.length = cpu_to_le16((u16)len); 11279202d7b6SMaya Erez d->dma.d0 = (vring_index << DMA_CFG_DESC_TX_0_QID_POS); 11289202d7b6SMaya Erez d->mac.d[0] = 0; 11299202d7b6SMaya Erez d->mac.d[1] = 0; 11309202d7b6SMaya Erez d->mac.d[2] = 0; 11319202d7b6SMaya Erez d->mac.ucode_cmd = 0; 11329202d7b6SMaya Erez /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi */ 11339202d7b6SMaya Erez d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | 11349202d7b6SMaya Erez (1 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); 11359202d7b6SMaya Erez 11369202d7b6SMaya Erez return 0; 11379202d7b6SMaya Erez } 11389202d7b6SMaya Erez 113996c93589SGidon Studinski void wil_tx_data_init(struct wil_ring_tx_data *txdata) 1140875e9439SMaya Erez { 1141875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1142875e9439SMaya Erez txdata->dot1x_open = 0; 1143875e9439SMaya Erez txdata->enabled = 0; 1144875e9439SMaya Erez txdata->idle = 0; 1145875e9439SMaya Erez txdata->last_idle = 0; 1146875e9439SMaya Erez txdata->begin = 0; 1147875e9439SMaya Erez txdata->agg_wsize = 0; 1148875e9439SMaya Erez txdata->agg_timeout = 0; 1149875e9439SMaya Erez txdata->agg_amsdu = 0; 1150875e9439SMaya Erez txdata->addba_in_progress = false; 1151e00243faSLior David txdata->mid = U8_MAX; 1152875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 1153875e9439SMaya Erez } 1154875e9439SMaya Erez 115596c93589SGidon Studinski static int wil_vring_init_tx(struct wil6210_vif *vif, int id, int size, 11562be7d22fSVladimir Kondratiev int cid, int tid) 11572be7d22fSVladimir Kondratiev { 1158e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 11592be7d22fSVladimir Kondratiev int rc; 11602be7d22fSVladimir Kondratiev struct wmi_vring_cfg_cmd cmd = { 11612be7d22fSVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 11622be7d22fSVladimir Kondratiev .vring_cfg = { 11632be7d22fSVladimir Kondratiev .tx_sw_ring = { 11649a06bec9SVladimir Kondratiev .max_mpdu_size = 1165c44690a1SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1166b5d98e9dSVladimir Kondratiev .ring_size = cpu_to_le16(size), 11672be7d22fSVladimir Kondratiev }, 11682be7d22fSVladimir Kondratiev .ringid = id, 11692be7d22fSVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 11702be7d22fSVladimir Kondratiev .mac_ctrl = 0, 11712be7d22fSVladimir Kondratiev .to_resolution = 0, 11723277213fSVladimir Kondratiev .agg_max_wsize = 0, 11732be7d22fSVladimir Kondratiev .schd_params = { 11742be7d22fSVladimir Kondratiev .priority = cpu_to_le16(0), 11752be7d22fSVladimir Kondratiev .timeslot_us = cpu_to_le16(0xfff), 11762be7d22fSVladimir Kondratiev }, 11772be7d22fSVladimir Kondratiev }, 11782be7d22fSVladimir Kondratiev }; 11792be7d22fSVladimir Kondratiev struct { 1180b874ddecSLior David struct wmi_cmd_hdr wmi; 11812be7d22fSVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1182807b0860SAlexei Avshalom Lazar } __packed reply = { 1183807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1184807b0860SAlexei Avshalom Lazar }; 118510590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 118610590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 11872be7d22fSVladimir Kondratiev 1188bf0353a6SAhmad Masri if (cid >= WIL6210_RX_DESC_MAX_CID) { 1189bf0353a6SAhmad Masri cmd.vring_cfg.cidxtid = CIDXTID_EXTENDED_CID_TID; 1190bf0353a6SAhmad Masri cmd.vring_cfg.cid = cid; 1191bf0353a6SAhmad Masri cmd.vring_cfg.tid = tid; 1192bf0353a6SAhmad Masri } else { 1193bf0353a6SAhmad Masri cmd.vring_cfg.cidxtid = mk_cidxtid(cid, tid); 1194bf0353a6SAhmad Masri } 1195bf0353a6SAhmad Masri 1196af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_tx: max_mpdu_size %d\n", 1197e0106adaSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 11989b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 11999cf10d62SVladimir Kondratiev 12002be7d22fSVladimir Kondratiev if (vring->va) { 12012be7d22fSVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 12022be7d22fSVladimir Kondratiev rc = -EINVAL; 12032be7d22fSVladimir Kondratiev goto out; 12042be7d22fSVladimir Kondratiev } 12052be7d22fSVladimir Kondratiev 1206875e9439SMaya Erez wil_tx_data_init(txdata); 120796c93589SGidon Studinski vring->is_rx = false; 12082be7d22fSVladimir Kondratiev vring->size = size; 12092be7d22fSVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 12102be7d22fSVladimir Kondratiev if (rc) 12112be7d22fSVladimir Kondratiev goto out; 12122be7d22fSVladimir Kondratiev 121310590c6aSGidon Studinski wil->ring2cid_tid[id][0] = cid; 121410590c6aSGidon Studinski wil->ring2cid_tid[id][1] = tid; 121593ae6d49SVladimir Kondratiev 12162be7d22fSVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 12172be7d22fSVladimir Kondratiev 1218e00243faSLior David if (!vif->privacy) 1219230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1220e00243faSLior David rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 12212a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 12222a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 12232be7d22fSVladimir Kondratiev if (rc) 12242be7d22fSVladimir Kondratiev goto out_free; 12252be7d22fSVladimir Kondratiev 1226b8023177SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 12272be7d22fSVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 12282be7d22fSVladimir Kondratiev reply.cmd.status); 1229c331997bSVladimir Kondratiev rc = -EINVAL; 12302be7d22fSVladimir Kondratiev goto out_free; 12312be7d22fSVladimir Kondratiev } 12322be7d22fSVladimir Kondratiev 1233dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1234dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1235e00243faSLior David txdata->mid = vif->mid; 1236097638a0SVladimir Kondratiev txdata->enabled = 1; 1237dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 1238dc90506fSMaya Erez 1239230d8442SVladimir Kondratiev if (txdata->dot1x_open && (agg_wsize >= 0)) 12403a3def8dSVladimir Kondratiev wil_addba_tx_request(wil, id, agg_wsize); 1241097638a0SVladimir Kondratiev 12422be7d22fSVladimir Kondratiev return 0; 12432be7d22fSVladimir Kondratiev out_free: 1244875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1245230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1246230d8442SVladimir Kondratiev txdata->enabled = 0; 1247875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 124896c93589SGidon Studinski wil_vring_free(wil, vring); 1249ddf7afddSAhmad Masri wil->ring2cid_tid[id][0] = wil->max_assoc_sta; 125010590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; 12510916d9f2SMaya Erez 12522be7d22fSVladimir Kondratiev out: 12532be7d22fSVladimir Kondratiev 12542be7d22fSVladimir Kondratiev return rc; 12552be7d22fSVladimir Kondratiev } 12562be7d22fSVladimir Kondratiev 1257b9010f10SAhmad Masri static int wil_tx_vring_modify(struct wil6210_vif *vif, int ring_id, int cid, 1258b9010f10SAhmad Masri int tid) 1259b9010f10SAhmad Masri { 1260b9010f10SAhmad Masri struct wil6210_priv *wil = vif_to_wil(vif); 1261b9010f10SAhmad Masri int rc; 1262b9010f10SAhmad Masri struct wmi_vring_cfg_cmd cmd = { 1263b9010f10SAhmad Masri .action = cpu_to_le32(WMI_VRING_CMD_MODIFY), 1264b9010f10SAhmad Masri .vring_cfg = { 1265b9010f10SAhmad Masri .tx_sw_ring = { 1266b9010f10SAhmad Masri .max_mpdu_size = 1267b9010f10SAhmad Masri cpu_to_le16(wil_mtu2macbuf(mtu_max)), 1268b9010f10SAhmad Masri .ring_size = 0, 1269b9010f10SAhmad Masri }, 1270b9010f10SAhmad Masri .ringid = ring_id, 1271b9010f10SAhmad Masri .cidxtid = mk_cidxtid(cid, tid), 1272b9010f10SAhmad Masri .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 1273b9010f10SAhmad Masri .mac_ctrl = 0, 1274b9010f10SAhmad Masri .to_resolution = 0, 1275b9010f10SAhmad Masri .agg_max_wsize = 0, 1276b9010f10SAhmad Masri .schd_params = { 1277b9010f10SAhmad Masri .priority = cpu_to_le16(0), 1278b9010f10SAhmad Masri .timeslot_us = cpu_to_le16(0xfff), 1279b9010f10SAhmad Masri }, 1280b9010f10SAhmad Masri }, 1281b9010f10SAhmad Masri }; 1282b9010f10SAhmad Masri struct { 1283b9010f10SAhmad Masri struct wmi_cmd_hdr wmi; 1284b9010f10SAhmad Masri struct wmi_vring_cfg_done_event cmd; 1285b9010f10SAhmad Masri } __packed reply = { 1286b9010f10SAhmad Masri .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1287b9010f10SAhmad Masri }; 1288b9010f10SAhmad Masri struct wil_ring *vring = &wil->ring_tx[ring_id]; 1289b9010f10SAhmad Masri struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; 1290b9010f10SAhmad Masri 1291b9010f10SAhmad Masri wil_dbg_misc(wil, "vring_modify: ring %d cid %d tid %d\n", ring_id, 1292b9010f10SAhmad Masri cid, tid); 1293b9010f10SAhmad Masri lockdep_assert_held(&wil->mutex); 1294b9010f10SAhmad Masri 1295b9010f10SAhmad Masri if (!vring->va) { 1296b9010f10SAhmad Masri wil_err(wil, "Tx ring [%d] not allocated\n", ring_id); 1297b9010f10SAhmad Masri return -EINVAL; 1298b9010f10SAhmad Masri } 1299b9010f10SAhmad Masri 1300b9010f10SAhmad Masri if (wil->ring2cid_tid[ring_id][0] != cid || 1301b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] != tid) { 1302b9010f10SAhmad Masri wil_err(wil, "ring info does not match cid=%u tid=%u\n", 1303b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][0], 1304b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1]); 1305b9010f10SAhmad Masri } 1306b9010f10SAhmad Masri 1307b9010f10SAhmad Masri cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 1308b9010f10SAhmad Masri 1309b9010f10SAhmad Masri rc = wmi_call(wil, WMI_VRING_CFG_CMDID, vif->mid, &cmd, sizeof(cmd), 13102a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 13112a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 1312b9010f10SAhmad Masri if (rc) 1313b9010f10SAhmad Masri goto fail; 1314b9010f10SAhmad Masri 1315b9010f10SAhmad Masri if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 1316b9010f10SAhmad Masri wil_err(wil, "Tx modify failed, status 0x%02x\n", 1317b9010f10SAhmad Masri reply.cmd.status); 1318b9010f10SAhmad Masri rc = -EINVAL; 1319b9010f10SAhmad Masri goto fail; 1320b9010f10SAhmad Masri } 1321b9010f10SAhmad Masri 1322b9010f10SAhmad Masri /* set BA aggregation window size to 0 to force a new BA with the 1323b9010f10SAhmad Masri * new AP 1324b9010f10SAhmad Masri */ 1325b9010f10SAhmad Masri txdata->agg_wsize = 0; 1326b9010f10SAhmad Masri if (txdata->dot1x_open && agg_wsize >= 0) 1327b9010f10SAhmad Masri wil_addba_tx_request(wil, ring_id, agg_wsize); 1328b9010f10SAhmad Masri 1329b9010f10SAhmad Masri return 0; 1330b9010f10SAhmad Masri fail: 1331b9010f10SAhmad Masri spin_lock_bh(&txdata->lock); 1332b9010f10SAhmad Masri txdata->dot1x_open = false; 1333b9010f10SAhmad Masri txdata->enabled = 0; 1334b9010f10SAhmad Masri spin_unlock_bh(&txdata->lock); 1335ddf7afddSAhmad Masri wil->ring2cid_tid[ring_id][0] = wil->max_assoc_sta; 1336b9010f10SAhmad Masri wil->ring2cid_tid[ring_id][1] = 0; 1337b9010f10SAhmad Masri return rc; 1338b9010f10SAhmad Masri } 1339b9010f10SAhmad Masri 1340e00243faSLior David int wil_vring_init_bcast(struct wil6210_vif *vif, int id, int size) 134141d6b093SVladimir Kondratiev { 1342e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 134341d6b093SVladimir Kondratiev int rc; 134441d6b093SVladimir Kondratiev struct wmi_bcast_vring_cfg_cmd cmd = { 134541d6b093SVladimir Kondratiev .action = cpu_to_le32(WMI_VRING_CMD_ADD), 134641d6b093SVladimir Kondratiev .vring_cfg = { 134741d6b093SVladimir Kondratiev .tx_sw_ring = { 134841d6b093SVladimir Kondratiev .max_mpdu_size = 134941d6b093SVladimir Kondratiev cpu_to_le16(wil_mtu2macbuf(mtu_max)), 135041d6b093SVladimir Kondratiev .ring_size = cpu_to_le16(size), 135141d6b093SVladimir Kondratiev }, 135241d6b093SVladimir Kondratiev .ringid = id, 135341d6b093SVladimir Kondratiev .encap_trans_type = WMI_VRING_ENC_TYPE_802_3, 135441d6b093SVladimir Kondratiev }, 135541d6b093SVladimir Kondratiev }; 135641d6b093SVladimir Kondratiev struct { 1357b874ddecSLior David struct wmi_cmd_hdr wmi; 135841d6b093SVladimir Kondratiev struct wmi_vring_cfg_done_event cmd; 1359807b0860SAlexei Avshalom Lazar } __packed reply = { 1360807b0860SAlexei Avshalom Lazar .cmd = {.status = WMI_FW_STATUS_FAILURE}, 1361807b0860SAlexei Avshalom Lazar }; 136210590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[id]; 136310590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[id]; 136441d6b093SVladimir Kondratiev 1365af3db60aSLazar Alexei wil_dbg_misc(wil, "vring_init_bcast: max_mpdu_size %d\n", 136641d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.max_mpdu_size); 13679b1ba7b2SVladimir Kondratiev lockdep_assert_held(&wil->mutex); 136841d6b093SVladimir Kondratiev 136941d6b093SVladimir Kondratiev if (vring->va) { 137041d6b093SVladimir Kondratiev wil_err(wil, "Tx ring [%d] already allocated\n", id); 137141d6b093SVladimir Kondratiev rc = -EINVAL; 137241d6b093SVladimir Kondratiev goto out; 137341d6b093SVladimir Kondratiev } 137441d6b093SVladimir Kondratiev 1375875e9439SMaya Erez wil_tx_data_init(txdata); 137696c93589SGidon Studinski vring->is_rx = false; 137741d6b093SVladimir Kondratiev vring->size = size; 137841d6b093SVladimir Kondratiev rc = wil_vring_alloc(wil, vring); 137941d6b093SVladimir Kondratiev if (rc) 138041d6b093SVladimir Kondratiev goto out; 138141d6b093SVladimir Kondratiev 1382ddf7afddSAhmad Masri wil->ring2cid_tid[id][0] = wil->max_assoc_sta; /* CID */ 138310590c6aSGidon Studinski wil->ring2cid_tid[id][1] = 0; /* TID */ 138441d6b093SVladimir Kondratiev 138541d6b093SVladimir Kondratiev cmd.vring_cfg.tx_sw_ring.ring_mem_base = cpu_to_le64(vring->pa); 138641d6b093SVladimir Kondratiev 1387e00243faSLior David if (!vif->privacy) 1388230d8442SVladimir Kondratiev txdata->dot1x_open = true; 1389e00243faSLior David rc = wmi_call(wil, WMI_BCAST_VRING_CFG_CMDID, vif->mid, 1390e00243faSLior David &cmd, sizeof(cmd), 13912a32c20bSAhmad Masri WMI_VRING_CFG_DONE_EVENTID, &reply, sizeof(reply), 13922a32c20bSAhmad Masri WIL_WMI_CALL_GENERAL_TO_MS); 139341d6b093SVladimir Kondratiev if (rc) 139441d6b093SVladimir Kondratiev goto out_free; 139541d6b093SVladimir Kondratiev 139641d6b093SVladimir Kondratiev if (reply.cmd.status != WMI_FW_STATUS_SUCCESS) { 139741d6b093SVladimir Kondratiev wil_err(wil, "Tx config failed, status 0x%02x\n", 139841d6b093SVladimir Kondratiev reply.cmd.status); 139941d6b093SVladimir Kondratiev rc = -EINVAL; 140041d6b093SVladimir Kondratiev goto out_free; 140141d6b093SVladimir Kondratiev } 140241d6b093SVladimir Kondratiev 1403dc90506fSMaya Erez spin_lock_bh(&txdata->lock); 1404dc90506fSMaya Erez vring->hwtail = le32_to_cpu(reply.cmd.tx_vring_tail_ptr); 1405e00243faSLior David txdata->mid = vif->mid; 140641d6b093SVladimir Kondratiev txdata->enabled = 1; 1407dc90506fSMaya Erez spin_unlock_bh(&txdata->lock); 140841d6b093SVladimir Kondratiev 140941d6b093SVladimir Kondratiev return 0; 141041d6b093SVladimir Kondratiev out_free: 1411875e9439SMaya Erez spin_lock_bh(&txdata->lock); 1412230d8442SVladimir Kondratiev txdata->enabled = 0; 1413230d8442SVladimir Kondratiev txdata->dot1x_open = false; 1414875e9439SMaya Erez spin_unlock_bh(&txdata->lock); 141596c93589SGidon Studinski wil_vring_free(wil, vring); 141641d6b093SVladimir Kondratiev out: 141741d6b093SVladimir Kondratiev 141841d6b093SVladimir Kondratiev return rc; 141941d6b093SVladimir Kondratiev } 142041d6b093SVladimir Kondratiev 142110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ucast(struct wil6210_priv *wil, 1422e00243faSLior David struct wil6210_vif *vif, 14232be7d22fSVladimir Kondratiev struct sk_buff *skb) 14242be7d22fSVladimir Kondratiev { 14256d1ba32cSAhmad Masri int i, cid; 14266d1ba32cSAhmad Masri const u8 *da = wil_skb_get_da(skb); 142796c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 14282be7d22fSVladimir Kondratiev 14296d1ba32cSAhmad Masri cid = wil_find_cid(wil, vif->mid, da); 14306d1ba32cSAhmad Masri 1431ddf7afddSAhmad Masri if (cid < 0 || cid >= wil->max_assoc_sta) 14323df2cd36SVladimir Kondratiev return NULL; 14333df2cd36SVladimir Kondratiev 14343df2cd36SVladimir Kondratiev /* TODO: fix for multiple TID */ 143596c93589SGidon Studinski for (i = min_ring_id; i < ARRAY_SIZE(wil->ring2cid_tid); i++) { 143610590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 143710590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1438230d8442SVladimir Kondratiev continue; 143910590c6aSGidon Studinski if (wil->ring2cid_tid[i][0] == cid) { 144010590c6aSGidon Studinski struct wil_ring *v = &wil->ring_tx[i]; 144110590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 14428fe59627SVladimir Kondratiev 1443af3db60aSLazar Alexei wil_dbg_txrx(wil, "find_tx_ucast: (%pM) -> [%d]\n", 14446d1ba32cSAhmad Masri da, i); 1445b729aaf0SMaya Erez if (v->va && txdata->enabled) { 14462be7d22fSVladimir Kondratiev return v; 14473df2cd36SVladimir Kondratiev } else { 1448af3db60aSLazar Alexei wil_dbg_txrx(wil, 1449af3db60aSLazar Alexei "find_tx_ucast: vring[%d] not valid\n", 1450af3db60aSLazar Alexei i); 14513df2cd36SVladimir Kondratiev return NULL; 14523df2cd36SVladimir Kondratiev } 14533df2cd36SVladimir Kondratiev } 14543df2cd36SVladimir Kondratiev } 14552be7d22fSVladimir Kondratiev 14562be7d22fSVladimir Kondratiev return NULL; 14572be7d22fSVladimir Kondratiev } 14582be7d22fSVladimir Kondratiev 14599202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 14609202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb); 146154ed90a8SVladimir Kondratiev 146210590c6aSGidon Studinski static struct wil_ring *wil_find_tx_ring_sta(struct wil6210_priv *wil, 1463e00243faSLior David struct wil6210_vif *vif, 146454ed90a8SVladimir Kondratiev struct sk_buff *skb) 146554ed90a8SVladimir Kondratiev { 146610590c6aSGidon Studinski struct wil_ring *ring; 146754ed90a8SVladimir Kondratiev int i; 146854ed90a8SVladimir Kondratiev u8 cid; 146910590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 147096c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 147154ed90a8SVladimir Kondratiev 147254ed90a8SVladimir Kondratiev /* In the STA mode, it is expected to have only 1 VRING 147354ed90a8SVladimir Kondratiev * for the AP we connected to. 1474230d8442SVladimir Kondratiev * find 1-st vring eligible for this skb and use it. 147554ed90a8SVladimir Kondratiev */ 147696c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 147710590c6aSGidon Studinski ring = &wil->ring_tx[i]; 147810590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 147910590c6aSGidon Studinski if (!ring->va || !txdata->enabled || txdata->mid != vif->mid) 148054ed90a8SVladimir Kondratiev continue; 148154ed90a8SVladimir Kondratiev 148210590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1483ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 148441d6b093SVladimir Kondratiev continue; 148541d6b093SVladimir Kondratiev 148610590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 148710590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1488230d8442SVladimir Kondratiev continue; 148954ed90a8SVladimir Kondratiev 149054ed90a8SVladimir Kondratiev wil_dbg_txrx(wil, "Tx -> ring %d\n", i); 149154ed90a8SVladimir Kondratiev 149210590c6aSGidon Studinski return ring; 149354ed90a8SVladimir Kondratiev } 149454ed90a8SVladimir Kondratiev 149510590c6aSGidon Studinski wil_dbg_txrx(wil, "Tx while no rings active?\n"); 149654ed90a8SVladimir Kondratiev 149754ed90a8SVladimir Kondratiev return NULL; 149854ed90a8SVladimir Kondratiev } 149954ed90a8SVladimir Kondratiev 150070812421SVladimir Kondratiev /* Use one of 2 strategies: 150170812421SVladimir Kondratiev * 150270812421SVladimir Kondratiev * 1. New (real broadcast): 150370812421SVladimir Kondratiev * use dedicated broadcast vring 150470812421SVladimir Kondratiev * 2. Old (pseudo-DMS): 150570812421SVladimir Kondratiev * Find 1-st vring and return it; 150670812421SVladimir Kondratiev * duplicate skb and send it to other active vrings; 150770812421SVladimir Kondratiev * in all cases override dest address to unicast peer's address 150870812421SVladimir Kondratiev * Use old strategy when new is not supported yet: 150970812421SVladimir Kondratiev * - for PBSS 151070812421SVladimir Kondratiev */ 151110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_1(struct wil6210_priv *wil, 1512e00243faSLior David struct wil6210_vif *vif, 1513fb3cac57SVladimir Kondratiev struct sk_buff *skb) 1514fb3cac57SVladimir Kondratiev { 151510590c6aSGidon Studinski struct wil_ring *v; 151610590c6aSGidon Studinski struct wil_ring_tx_data *txdata; 151710590c6aSGidon Studinski int i = vif->bcast_ring; 1518fb3cac57SVladimir Kondratiev 151941d6b093SVladimir Kondratiev if (i < 0) 152041d6b093SVladimir Kondratiev return NULL; 152110590c6aSGidon Studinski v = &wil->ring_tx[i]; 152210590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1523b729aaf0SMaya Erez if (!v->va || !txdata->enabled) 1524fb3cac57SVladimir Kondratiev return NULL; 152510590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 152610590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 1527230d8442SVladimir Kondratiev return NULL; 1528fb3cac57SVladimir Kondratiev 1529fb3cac57SVladimir Kondratiev return v; 1530fb3cac57SVladimir Kondratiev } 1531fb3cac57SVladimir Kondratiev 153270812421SVladimir Kondratiev static void wil_set_da_for_vring(struct wil6210_priv *wil, 153370812421SVladimir Kondratiev struct sk_buff *skb, int vring_index) 153470812421SVladimir Kondratiev { 15356d1ba32cSAhmad Masri u8 *da = wil_skb_get_da(skb); 153610590c6aSGidon Studinski int cid = wil->ring2cid_tid[vring_index][0]; 153770812421SVladimir Kondratiev 15386d1ba32cSAhmad Masri ether_addr_copy(da, wil->sta[cid].addr); 153970812421SVladimir Kondratiev } 154070812421SVladimir Kondratiev 154110590c6aSGidon Studinski static struct wil_ring *wil_find_tx_bcast_2(struct wil6210_priv *wil, 1542e00243faSLior David struct wil6210_vif *vif, 154370812421SVladimir Kondratiev struct sk_buff *skb) 154470812421SVladimir Kondratiev { 154510590c6aSGidon Studinski struct wil_ring *v, *v2; 154670812421SVladimir Kondratiev struct sk_buff *skb2; 154770812421SVladimir Kondratiev int i; 154870812421SVladimir Kondratiev u8 cid; 15496d1ba32cSAhmad Masri const u8 *src = wil_skb_get_sa(skb); 155010590c6aSGidon Studinski struct wil_ring_tx_data *txdata, *txdata2; 155196c93589SGidon Studinski int min_ring_id = wil_get_min_tx_ring_id(wil); 155270812421SVladimir Kondratiev 155370812421SVladimir Kondratiev /* find 1-st vring eligible for data */ 155496c93589SGidon Studinski for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 155510590c6aSGidon Studinski v = &wil->ring_tx[i]; 155610590c6aSGidon Studinski txdata = &wil->ring_tx_data[i]; 1557e00243faSLior David if (!v->va || !txdata->enabled || txdata->mid != vif->mid) 155870812421SVladimir Kondratiev continue; 155970812421SVladimir Kondratiev 156010590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1561ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 156270812421SVladimir Kondratiev continue; 156310590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 156410590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 156570812421SVladimir Kondratiev continue; 156670812421SVladimir Kondratiev 156770812421SVladimir Kondratiev /* don't Tx back to source when re-routing Rx->Tx at the AP */ 156870812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 156970812421SVladimir Kondratiev continue; 157070812421SVladimir Kondratiev 157170812421SVladimir Kondratiev goto found; 157270812421SVladimir Kondratiev } 157370812421SVladimir Kondratiev 157470812421SVladimir Kondratiev wil_dbg_txrx(wil, "Tx while no vrings active?\n"); 157570812421SVladimir Kondratiev 157670812421SVladimir Kondratiev return NULL; 157770812421SVladimir Kondratiev 157870812421SVladimir Kondratiev found: 157970812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST -> ring %d\n", i); 158070812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb, i); 158170812421SVladimir Kondratiev 158270812421SVladimir Kondratiev /* find other active vrings and duplicate skb for each */ 158370812421SVladimir Kondratiev for (i++; i < WIL6210_MAX_TX_RINGS; i++) { 158410590c6aSGidon Studinski v2 = &wil->ring_tx[i]; 158510590c6aSGidon Studinski txdata2 = &wil->ring_tx_data[i]; 1586e00243faSLior David if (!v2->va || txdata2->mid != vif->mid) 158770812421SVladimir Kondratiev continue; 158810590c6aSGidon Studinski cid = wil->ring2cid_tid[i][0]; 1589ddf7afddSAhmad Masri if (cid >= wil->max_assoc_sta) /* skip BCAST */ 159070812421SVladimir Kondratiev continue; 159110590c6aSGidon Studinski if (!wil->ring_tx_data[i].dot1x_open && 159210590c6aSGidon Studinski skb->protocol != cpu_to_be16(ETH_P_PAE)) 159370812421SVladimir Kondratiev continue; 159470812421SVladimir Kondratiev 159570812421SVladimir Kondratiev if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN)) 159670812421SVladimir Kondratiev continue; 159770812421SVladimir Kondratiev 159870812421SVladimir Kondratiev skb2 = skb_copy(skb, GFP_ATOMIC); 159970812421SVladimir Kondratiev if (skb2) { 160070812421SVladimir Kondratiev wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i); 160170812421SVladimir Kondratiev wil_set_da_for_vring(wil, skb2, i); 16029202d7b6SMaya Erez wil_tx_ring(wil, vif, v2, skb2); 160366449740SLior David /* successful call to wil_tx_ring takes skb2 ref */ 160466449740SLior David dev_kfree_skb_any(skb2); 160570812421SVladimir Kondratiev } else { 160670812421SVladimir Kondratiev wil_err(wil, "skb_copy failed\n"); 160770812421SVladimir Kondratiev } 160870812421SVladimir Kondratiev } 160970812421SVladimir Kondratiev 161070812421SVladimir Kondratiev return v; 161170812421SVladimir Kondratiev } 161270812421SVladimir Kondratiev 1613c236658fSVladimir Kondratiev static inline 1614c236658fSVladimir Kondratiev void wil_tx_desc_set_nr_frags(struct vring_tx_desc *d, int nr_frags) 1615c236658fSVladimir Kondratiev { 16163d4bde15SVladimir Kondratiev d->mac.d[2] |= (nr_frags << MAC_CFG_DESC_TX_2_NUM_OF_DESCRIPTORS_POS); 1617c236658fSVladimir Kondratiev } 1618c236658fSVladimir Kondratiev 16193d4bde15SVladimir Kondratiev /** 16203d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding 16213d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 16223d4bde15SVladimir Kondratiev * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, 16233d4bde15SVladimir Kondratiev * 2 - middle, 3 - last descriptor. 16243d4bde15SVladimir Kondratiev */ 16253d4bde15SVladimir Kondratiev 16263d4bde15SVladimir Kondratiev static void wil_tx_desc_offload_setup_tso(struct vring_tx_desc *d, 16273d4bde15SVladimir Kondratiev struct sk_buff *skb, 16283d4bde15SVladimir Kondratiev int tso_desc_type, bool is_ipv4, 16293d4bde15SVladimir Kondratiev int tcp_hdr_len, int skb_net_hdr_len) 1630504937d4SKirshenbaum Erez { 16313d4bde15SVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 16323d4bde15SVladimir Kondratiev d->dma.b11 |= is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; 16333d4bde15SVladimir Kondratiev 16343d4bde15SVladimir Kondratiev d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 16353d4bde15SVladimir Kondratiev /* L4 header len: TCP header length */ 16363d4bde15SVladimir Kondratiev d->dma.d0 |= (tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 16373d4bde15SVladimir Kondratiev 16383d4bde15SVladimir Kondratiev /* Setup TSO: bit and desc type */ 16393d4bde15SVladimir Kondratiev d->dma.d0 |= (BIT(DMA_CFG_DESC_TX_0_TCP_SEG_EN_POS)) | 16403d4bde15SVladimir Kondratiev (tso_desc_type << DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS); 16413d4bde15SVladimir Kondratiev d->dma.d0 |= (is_ipv4 << DMA_CFG_DESC_TX_0_IPV4_CHECKSUM_EN_POS); 16423d4bde15SVladimir Kondratiev 16433d4bde15SVladimir Kondratiev d->dma.ip_length = skb_net_hdr_len; 16443d4bde15SVladimir Kondratiev /* Enable TCP/UDP checksum */ 16453d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 16463d4bde15SVladimir Kondratiev /* Calculate pseudo-header */ 16473d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 16483d4bde15SVladimir Kondratiev } 16493d4bde15SVladimir Kondratiev 16503d4bde15SVladimir Kondratiev /** 16513d4bde15SVladimir Kondratiev * Sets the descriptor @d up for csum. The corresponding 16523d4bde15SVladimir Kondratiev * @skb is used to obtain the protocol and headers length. 16533d4bde15SVladimir Kondratiev * Returns the protocol: 0 - not TCP, 1 - TCPv4, 2 - TCPv6. 16543d4bde15SVladimir Kondratiev * Note, if d==NULL, the function only returns the protocol result. 16553d4bde15SVladimir Kondratiev * 16563d4bde15SVladimir Kondratiev * It is very similar to previous wil_tx_desc_offload_setup_tso. This 16573d4bde15SVladimir Kondratiev * is "if unrolling" to optimize the critical path. 16583d4bde15SVladimir Kondratiev */ 16593d4bde15SVladimir Kondratiev 16603d4bde15SVladimir Kondratiev static int wil_tx_desc_offload_setup(struct vring_tx_desc *d, 16613d4bde15SVladimir Kondratiev struct sk_buff *skb){ 1662504937d4SKirshenbaum Erez int protocol; 1663504937d4SKirshenbaum Erez 1664504937d4SKirshenbaum Erez if (skb->ip_summed != CHECKSUM_PARTIAL) 1665504937d4SKirshenbaum Erez return 0; 1666504937d4SKirshenbaum Erez 1667df2d08eeSVladimir Kondratiev d->dma.b11 = ETH_HLEN; /* MAC header length */ 1668df2d08eeSVladimir Kondratiev 1669504937d4SKirshenbaum Erez switch (skb->protocol) { 1670504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IP): 1671504937d4SKirshenbaum Erez protocol = ip_hdr(skb)->protocol; 1672df2d08eeSVladimir Kondratiev d->dma.b11 |= BIT(DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS); 1673504937d4SKirshenbaum Erez break; 1674504937d4SKirshenbaum Erez case cpu_to_be16(ETH_P_IPV6): 1675504937d4SKirshenbaum Erez protocol = ipv6_hdr(skb)->nexthdr; 1676504937d4SKirshenbaum Erez break; 1677504937d4SKirshenbaum Erez default: 1678504937d4SKirshenbaum Erez return -EINVAL; 1679504937d4SKirshenbaum Erez } 1680504937d4SKirshenbaum Erez 1681504937d4SKirshenbaum Erez switch (protocol) { 1682504937d4SKirshenbaum Erez case IPPROTO_TCP: 1683504937d4SKirshenbaum Erez d->dma.d0 |= (2 << DMA_CFG_DESC_TX_0_L4_TYPE_POS); 1684504937d4SKirshenbaum Erez /* L4 header len: TCP header length */ 1685504937d4SKirshenbaum Erez d->dma.d0 |= 1686504937d4SKirshenbaum Erez (tcp_hdrlen(skb) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1687504937d4SKirshenbaum Erez break; 1688504937d4SKirshenbaum Erez case IPPROTO_UDP: 1689504937d4SKirshenbaum Erez /* L4 header len: UDP header length */ 1690504937d4SKirshenbaum Erez d->dma.d0 |= 1691504937d4SKirshenbaum Erez (sizeof(struct udphdr) & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK); 1692504937d4SKirshenbaum Erez break; 1693504937d4SKirshenbaum Erez default: 1694504937d4SKirshenbaum Erez return -EINVAL; 1695504937d4SKirshenbaum Erez } 1696504937d4SKirshenbaum Erez 1697504937d4SKirshenbaum Erez d->dma.ip_length = skb_network_header_len(skb); 1698504937d4SKirshenbaum Erez /* Enable TCP/UDP checksum */ 1699504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_TCP_UDP_CHECKSUM_EN_POS); 1700504937d4SKirshenbaum Erez /* Calculate pseudo-header */ 1701504937d4SKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_PSEUDO_HEADER_CALC_EN_POS); 1702504937d4SKirshenbaum Erez 1703504937d4SKirshenbaum Erez return 0; 1704504937d4SKirshenbaum Erez } 1705504937d4SKirshenbaum Erez 17063d4bde15SVladimir Kondratiev static inline void wil_tx_last_desc(struct vring_tx_desc *d) 17073d4bde15SVladimir Kondratiev { 17083d4bde15SVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS) | 17093d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS) | 17103d4bde15SVladimir Kondratiev BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 17113d4bde15SVladimir Kondratiev } 17123d4bde15SVladimir Kondratiev 17133d4bde15SVladimir Kondratiev static inline void wil_set_tx_desc_last_tso(volatile struct vring_tx_desc *d) 17143d4bde15SVladimir Kondratiev { 17153d4bde15SVladimir Kondratiev d->dma.d0 |= wil_tso_type_lst << 17163d4bde15SVladimir Kondratiev DMA_CFG_DESC_TX_0_SEGMENT_BUF_DETAILS_POS; 17173d4bde15SVladimir Kondratiev } 17183d4bde15SVladimir Kondratiev 1719e00243faSLior David static int __wil_tx_vring_tso(struct wil6210_priv *wil, struct wil6210_vif *vif, 172010590c6aSGidon Studinski struct wil_ring *vring, struct sk_buff *skb) 17213d4bde15SVladimir Kondratiev { 17223d4bde15SVladimir Kondratiev struct device *dev = wil_to_dev(wil); 17233d4bde15SVladimir Kondratiev 17243d4bde15SVladimir Kondratiev /* point to descriptors in shared memory */ 17253d4bde15SVladimir Kondratiev volatile struct vring_tx_desc *_desc = NULL, *_hdr_desc, 17263d4bde15SVladimir Kondratiev *_first_desc = NULL; 17273d4bde15SVladimir Kondratiev 17283d4bde15SVladimir Kondratiev /* pointers to shadow descriptors */ 17293d4bde15SVladimir Kondratiev struct vring_tx_desc desc_mem, hdr_desc_mem, first_desc_mem, 17303d4bde15SVladimir Kondratiev *d = &hdr_desc_mem, *hdr_desc = &hdr_desc_mem, 17313d4bde15SVladimir Kondratiev *first_desc = &first_desc_mem; 17323d4bde15SVladimir Kondratiev 17333d4bde15SVladimir Kondratiev /* pointer to shadow descriptors' context */ 17343d4bde15SVladimir Kondratiev struct wil_ctx *hdr_ctx, *first_ctx = NULL; 17353d4bde15SVladimir Kondratiev 17363d4bde15SVladimir Kondratiev int descs_used = 0; /* total number of used descriptors */ 17373d4bde15SVladimir Kondratiev int sg_desc_cnt = 0; /* number of descriptors for current mss*/ 17383d4bde15SVladimir Kondratiev 17393d4bde15SVladimir Kondratiev u32 swhead = vring->swhead; 174010590c6aSGidon Studinski int used, avail = wil_ring_avail_tx(vring); 17413d4bde15SVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 17423d4bde15SVladimir Kondratiev int min_desc_required = nr_frags + 1; 17433d4bde15SVladimir Kondratiev int mss = skb_shinfo(skb)->gso_size; /* payload size w/o headers */ 17443d4bde15SVladimir Kondratiev int f, len, hdrlen, headlen; 174510590c6aSGidon Studinski int vring_index = vring - wil->ring_tx; 174610590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[vring_index]; 17473d4bde15SVladimir Kondratiev uint i = swhead; 17483d4bde15SVladimir Kondratiev dma_addr_t pa; 17493d4bde15SVladimir Kondratiev const skb_frag_t *frag = NULL; 17503d4bde15SVladimir Kondratiev int rem_data = mss; 17513d4bde15SVladimir Kondratiev int lenmss; 17523d4bde15SVladimir Kondratiev int hdr_compensation_need = true; 17533d4bde15SVladimir Kondratiev int desc_tso_type = wil_tso_type_first; 17543d4bde15SVladimir Kondratiev bool is_ipv4; 17553d4bde15SVladimir Kondratiev int tcp_hdr_len; 17563d4bde15SVladimir Kondratiev int skb_net_hdr_len; 17573d4bde15SVladimir Kondratiev int gso_type; 1758e3d2ed94SHamad Kadmany int rc = -EINVAL; 17593d4bde15SVladimir Kondratiev 1760af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_vring_tso: %d bytes to vring %d\n", skb->len, 1761af3db60aSLazar Alexei vring_index); 17623d4bde15SVladimir Kondratiev 17633d4bde15SVladimir Kondratiev if (unlikely(!txdata->enabled)) 17643d4bde15SVladimir Kondratiev return -EINVAL; 17653d4bde15SVladimir Kondratiev 17663d4bde15SVladimir Kondratiev /* A typical page 4K is 3-4 payloads, we assume each fragment 17673d4bde15SVladimir Kondratiev * is a full payload, that's how min_desc_required has been 17683d4bde15SVladimir Kondratiev * calculated. In real we might need more or less descriptors, 17693d4bde15SVladimir Kondratiev * this is the initial check only. 17703d4bde15SVladimir Kondratiev */ 17713d4bde15SVladimir Kondratiev if (unlikely(avail < min_desc_required)) { 17723d4bde15SVladimir Kondratiev wil_err_ratelimited(wil, 17733d4bde15SVladimir Kondratiev "TSO: Tx ring[%2d] full. No space for %d fragments\n", 17743d4bde15SVladimir Kondratiev vring_index, min_desc_required); 17753d4bde15SVladimir Kondratiev return -ENOMEM; 17763d4bde15SVladimir Kondratiev } 17773d4bde15SVladimir Kondratiev 17783d4bde15SVladimir Kondratiev /* Header Length = MAC header len + IP header len + TCP header len*/ 17793d4bde15SVladimir Kondratiev hdrlen = ETH_HLEN + 17803d4bde15SVladimir Kondratiev (int)skb_network_header_len(skb) + 17813d4bde15SVladimir Kondratiev tcp_hdrlen(skb); 17823d4bde15SVladimir Kondratiev 17833d4bde15SVladimir Kondratiev gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); 17843d4bde15SVladimir Kondratiev switch (gso_type) { 17853d4bde15SVladimir Kondratiev case SKB_GSO_TCPV4: 17863d4bde15SVladimir Kondratiev /* TCP v4, zero out the IP length and IPv4 checksum fields 17873d4bde15SVladimir Kondratiev * as required by the offloading doc 17883d4bde15SVladimir Kondratiev */ 17893d4bde15SVladimir Kondratiev ip_hdr(skb)->tot_len = 0; 17903d4bde15SVladimir Kondratiev ip_hdr(skb)->check = 0; 17913d4bde15SVladimir Kondratiev is_ipv4 = true; 17923d4bde15SVladimir Kondratiev break; 17933d4bde15SVladimir Kondratiev case SKB_GSO_TCPV6: 17943d4bde15SVladimir Kondratiev /* TCP v6, zero out the payload length */ 17953d4bde15SVladimir Kondratiev ipv6_hdr(skb)->payload_len = 0; 17963d4bde15SVladimir Kondratiev is_ipv4 = false; 17973d4bde15SVladimir Kondratiev break; 17983d4bde15SVladimir Kondratiev default: 17993d4bde15SVladimir Kondratiev /* other than TCPv4 or TCPv6 types are not supported for TSO. 18003d4bde15SVladimir Kondratiev * It is also illegal for both to be set simultaneously 18013d4bde15SVladimir Kondratiev */ 18023d4bde15SVladimir Kondratiev return -EINVAL; 18033d4bde15SVladimir Kondratiev } 18043d4bde15SVladimir Kondratiev 18053d4bde15SVladimir Kondratiev if (skb->ip_summed != CHECKSUM_PARTIAL) 18063d4bde15SVladimir Kondratiev return -EINVAL; 18073d4bde15SVladimir Kondratiev 18083d4bde15SVladimir Kondratiev /* tcp header length and skb network header length are fixed for all 18093d4bde15SVladimir Kondratiev * packet's descriptors - read then once here 18103d4bde15SVladimir Kondratiev */ 18113d4bde15SVladimir Kondratiev tcp_hdr_len = tcp_hdrlen(skb); 18123d4bde15SVladimir Kondratiev skb_net_hdr_len = skb_network_header_len(skb); 18133d4bde15SVladimir Kondratiev 181410590c6aSGidon Studinski _hdr_desc = &vring->va[i].tx.legacy; 18153d4bde15SVladimir Kondratiev 18163d4bde15SVladimir Kondratiev pa = dma_map_single(dev, skb->data, hdrlen, DMA_TO_DEVICE); 18173d4bde15SVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) { 18183d4bde15SVladimir Kondratiev wil_err(wil, "TSO: Skb head DMA map error\n"); 18193d4bde15SVladimir Kondratiev goto err_exit; 18203d4bde15SVladimir Kondratiev } 18213d4bde15SVladimir Kondratiev 18229202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)hdr_desc, pa, 18239202d7b6SMaya Erez hdrlen, vring_index); 18243d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(hdr_desc, skb, wil_tso_type_hdr, is_ipv4, 18253d4bde15SVladimir Kondratiev tcp_hdr_len, skb_net_hdr_len); 18263d4bde15SVladimir Kondratiev wil_tx_last_desc(hdr_desc); 18273d4bde15SVladimir Kondratiev 18283d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 18293d4bde15SVladimir Kondratiev hdr_ctx = &vring->ctx[i]; 18303d4bde15SVladimir Kondratiev 18313d4bde15SVladimir Kondratiev descs_used++; 18323d4bde15SVladimir Kondratiev headlen = skb_headlen(skb) - hdrlen; 18333d4bde15SVladimir Kondratiev 18343d4bde15SVladimir Kondratiev for (f = headlen ? -1 : 0; f < nr_frags; f++) { 18353d4bde15SVladimir Kondratiev if (headlen) { 18363d4bde15SVladimir Kondratiev len = headlen; 18373d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: process skb head, len %u\n", 18383d4bde15SVladimir Kondratiev len); 18393d4bde15SVladimir Kondratiev } else { 18403d4bde15SVladimir Kondratiev frag = &skb_shinfo(skb)->frags[f]; 1841d7840976SMatthew Wilcox (Oracle) len = skb_frag_size(frag); 18423d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: frag[%d]: len %u\n", f, len); 18433d4bde15SVladimir Kondratiev } 18443d4bde15SVladimir Kondratiev 18453d4bde15SVladimir Kondratiev while (len) { 18463d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 18473d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d\n", 18483d4bde15SVladimir Kondratiev len, rem_data, descs_used); 18493d4bde15SVladimir Kondratiev 18503d4bde15SVladimir Kondratiev if (descs_used == avail) { 1851e3d2ed94SHamad Kadmany wil_err_ratelimited(wil, "TSO: ring overflow\n"); 1852e3d2ed94SHamad Kadmany rc = -ENOMEM; 1853e3d2ed94SHamad Kadmany goto mem_error; 18543d4bde15SVladimir Kondratiev } 18553d4bde15SVladimir Kondratiev 18563d4bde15SVladimir Kondratiev lenmss = min_t(int, rem_data, len); 18573d4bde15SVladimir Kondratiev i = (swhead + descs_used) % vring->size; 18583d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "TSO: lenmss %d, i %d\n", lenmss, i); 18593d4bde15SVladimir Kondratiev 18603d4bde15SVladimir Kondratiev if (!headlen) { 18613d4bde15SVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 1862d7840976SMatthew Wilcox (Oracle) skb_frag_size(frag) - len, 1863d7840976SMatthew Wilcox (Oracle) lenmss, DMA_TO_DEVICE); 18643d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_page; 18653d4bde15SVladimir Kondratiev } else { 18663d4bde15SVladimir Kondratiev pa = dma_map_single(dev, 18673d4bde15SVladimir Kondratiev skb->data + 18683d4bde15SVladimir Kondratiev skb_headlen(skb) - headlen, 18693d4bde15SVladimir Kondratiev lenmss, 18703d4bde15SVladimir Kondratiev DMA_TO_DEVICE); 18713d4bde15SVladimir Kondratiev vring->ctx[i].mapped_as = wil_mapped_as_single; 18723d4bde15SVladimir Kondratiev headlen -= lenmss; 18733d4bde15SVladimir Kondratiev } 18743d4bde15SVladimir Kondratiev 1875e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 1876e3d2ed94SHamad Kadmany wil_err(wil, "TSO: DMA map page error\n"); 1877e3d2ed94SHamad Kadmany goto mem_error; 1878e3d2ed94SHamad Kadmany } 18793d4bde15SVladimir Kondratiev 188010590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 18813d4bde15SVladimir Kondratiev 18823d4bde15SVladimir Kondratiev if (!_first_desc) { 18833d4bde15SVladimir Kondratiev _first_desc = _desc; 18843d4bde15SVladimir Kondratiev first_ctx = &vring->ctx[i]; 18853d4bde15SVladimir Kondratiev d = first_desc; 18863d4bde15SVladimir Kondratiev } else { 18873d4bde15SVladimir Kondratiev d = &desc_mem; 18883d4bde15SVladimir Kondratiev } 18893d4bde15SVladimir Kondratiev 18909202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 18919202d7b6SMaya Erez pa, lenmss, vring_index); 18923d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup_tso(d, skb, desc_tso_type, 18933d4bde15SVladimir Kondratiev is_ipv4, tcp_hdr_len, 18943d4bde15SVladimir Kondratiev skb_net_hdr_len); 18953d4bde15SVladimir Kondratiev 18963d4bde15SVladimir Kondratiev /* use tso_type_first only once */ 18973d4bde15SVladimir Kondratiev desc_tso_type = wil_tso_type_mid; 18983d4bde15SVladimir Kondratiev 18993d4bde15SVladimir Kondratiev descs_used++; /* desc used so far */ 19003d4bde15SVladimir Kondratiev sg_desc_cnt++; /* desc used for this segment */ 19013d4bde15SVladimir Kondratiev len -= lenmss; 19023d4bde15SVladimir Kondratiev rem_data -= lenmss; 19033d4bde15SVladimir Kondratiev 19043d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, 19053d4bde15SVladimir Kondratiev "TSO: len %d, rem_data %d, descs_used %d, sg_desc_cnt %d,\n", 19063d4bde15SVladimir Kondratiev len, rem_data, descs_used, sg_desc_cnt); 19073d4bde15SVladimir Kondratiev 19083d4bde15SVladimir Kondratiev /* Close the segment if reached mss size or last frag*/ 19093d4bde15SVladimir Kondratiev if (rem_data == 0 || (f == nr_frags - 1 && len == 0)) { 19103d4bde15SVladimir Kondratiev if (hdr_compensation_need) { 19113d4bde15SVladimir Kondratiev /* first segment include hdr desc for 19123d4bde15SVladimir Kondratiev * release 19133d4bde15SVladimir Kondratiev */ 19143d4bde15SVladimir Kondratiev hdr_ctx->nr_frags = sg_desc_cnt; 19153d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 19163d4bde15SVladimir Kondratiev sg_desc_cnt + 19173d4bde15SVladimir Kondratiev 1); 19183d4bde15SVladimir Kondratiev hdr_compensation_need = false; 19193d4bde15SVladimir Kondratiev } else { 19203d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(first_desc, 19213d4bde15SVladimir Kondratiev sg_desc_cnt); 19223d4bde15SVladimir Kondratiev } 19233d4bde15SVladimir Kondratiev first_ctx->nr_frags = sg_desc_cnt - 1; 19243d4bde15SVladimir Kondratiev 19253d4bde15SVladimir Kondratiev wil_tx_last_desc(d); 19263d4bde15SVladimir Kondratiev 19273d4bde15SVladimir Kondratiev /* first descriptor may also be the last 19283d4bde15SVladimir Kondratiev * for this mss - make sure not to copy 19293d4bde15SVladimir Kondratiev * it twice 19303d4bde15SVladimir Kondratiev */ 19313d4bde15SVladimir Kondratiev if (first_desc != d) 19323d4bde15SVladimir Kondratiev *_first_desc = *first_desc; 19333d4bde15SVladimir Kondratiev 19343d4bde15SVladimir Kondratiev /*last descriptor will be copied at the end 19353d4bde15SVladimir Kondratiev * of this TS processing 19363d4bde15SVladimir Kondratiev */ 19373d4bde15SVladimir Kondratiev if (f < nr_frags - 1 || len > 0) 19383d4bde15SVladimir Kondratiev *_desc = *d; 19393d4bde15SVladimir Kondratiev 19403d4bde15SVladimir Kondratiev rem_data = mss; 19413d4bde15SVladimir Kondratiev _first_desc = NULL; 19423d4bde15SVladimir Kondratiev sg_desc_cnt = 0; 19433d4bde15SVladimir Kondratiev } else if (first_desc != d) /* update mid descriptor */ 19443d4bde15SVladimir Kondratiev *_desc = *d; 19453d4bde15SVladimir Kondratiev } 19463d4bde15SVladimir Kondratiev } 19473d4bde15SVladimir Kondratiev 19489c646597SAlexei Avshalom Lazar if (!_desc) 19499c646597SAlexei Avshalom Lazar goto mem_error; 19509c646597SAlexei Avshalom Lazar 19513d4bde15SVladimir Kondratiev /* first descriptor may also be the last. 19523d4bde15SVladimir Kondratiev * in this case d pointer is invalid 19533d4bde15SVladimir Kondratiev */ 19543d4bde15SVladimir Kondratiev if (_first_desc == _desc) 19553d4bde15SVladimir Kondratiev d = first_desc; 19563d4bde15SVladimir Kondratiev 19573d4bde15SVladimir Kondratiev /* Last data descriptor */ 19583d4bde15SVladimir Kondratiev wil_set_tx_desc_last_tso(d); 19593d4bde15SVladimir Kondratiev *_desc = *d; 19603d4bde15SVladimir Kondratiev 19613d4bde15SVladimir Kondratiev /* Fill the total number of descriptors in first desc (hdr)*/ 19623d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(hdr_desc, descs_used); 19633d4bde15SVladimir Kondratiev *_hdr_desc = *hdr_desc; 19643d4bde15SVladimir Kondratiev 19653d4bde15SVladimir Kondratiev /* hold reference to skb 19663d4bde15SVladimir Kondratiev * to prevent skb release before accounting 19673d4bde15SVladimir Kondratiev * in case of immediate "tx done" 19683d4bde15SVladimir Kondratiev */ 19693d4bde15SVladimir Kondratiev vring->ctx[i].skb = skb_get(skb); 19703d4bde15SVladimir Kondratiev 19713d4bde15SVladimir Kondratiev /* performance monitoring */ 197210590c6aSGidon Studinski used = wil_ring_used_tx(vring); 197310590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 19743d4bde15SVladimir Kondratiev used, used + descs_used)) { 19753d4bde15SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 19763d4bde15SVladimir Kondratiev wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 19773d4bde15SVladimir Kondratiev vring_index, used, used + descs_used); 19783d4bde15SVladimir Kondratiev } 19793d4bde15SVladimir Kondratiev 1980eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 1981eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 1982eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 1983eb26cff1SMaya Erez * skb before it was completed. 1984eb26cff1SMaya Erez */ 1985eb26cff1SMaya Erez wmb(); 1986eb26cff1SMaya Erez 19873d4bde15SVladimir Kondratiev /* advance swhead */ 198810590c6aSGidon Studinski wil_ring_advance_head(vring, descs_used); 1989e3d2ed94SHamad Kadmany wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, vring->swhead); 19903d4bde15SVladimir Kondratiev 19913d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 19923d4bde15SVladimir Kondratiev * committing them to HW 19933d4bde15SVladimir Kondratiev */ 19943d4bde15SVladimir Kondratiev wmb(); 19953d4bde15SVladimir Kondratiev 1996a24a3d6aSDedy Lansky if (wil->tx_latency) 1997a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 1998a24a3d6aSDedy Lansky else 1999a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 2000a24a3d6aSDedy Lansky 2001b9eeb512SVladimir Kondratiev wil_w(wil, vring->hwtail, vring->swhead); 20023d4bde15SVladimir Kondratiev return 0; 20033d4bde15SVladimir Kondratiev 2004e3d2ed94SHamad Kadmany mem_error: 20053d4bde15SVladimir Kondratiev while (descs_used > 0) { 20063d4bde15SVladimir Kondratiev struct wil_ctx *ctx; 20073d4bde15SVladimir Kondratiev 2008a1526f7eSMaya Erez i = (swhead + descs_used - 1) % vring->size; 200910590c6aSGidon Studinski d = (struct vring_tx_desc *)&vring->va[i].tx.legacy; 201010590c6aSGidon Studinski _desc = &vring->va[i].tx.legacy; 20113d4bde15SVladimir Kondratiev *d = *_desc; 20123d4bde15SVladimir Kondratiev _desc->dma.status = TX_DMA_STATUS_DU; 20133d4bde15SVladimir Kondratiev ctx = &vring->ctx[i]; 20149202d7b6SMaya Erez wil_txdesc_unmap(dev, (union wil_tx_desc *)d, ctx); 20153d4bde15SVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 20163d4bde15SVladimir Kondratiev descs_used--; 20173d4bde15SVladimir Kondratiev } 20183d4bde15SVladimir Kondratiev err_exit: 2019e3d2ed94SHamad Kadmany return rc; 20203d4bde15SVladimir Kondratiev } 20213d4bde15SVladimir Kondratiev 20229202d7b6SMaya Erez static int __wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 20239202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 20242be7d22fSVladimir Kondratiev { 20252be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 202668ada71eSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 202768ada71eSVladimir Kondratiev volatile struct vring_tx_desc *_d; 20289202d7b6SMaya Erez u32 swhead = ring->swhead; 20299202d7b6SMaya Erez int avail = wil_ring_avail_tx(ring); 20302be7d22fSVladimir Kondratiev int nr_frags = skb_shinfo(skb)->nr_frags; 2031504937d4SKirshenbaum Erez uint f = 0; 20329202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 20339202d7b6SMaya Erez struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 20342be7d22fSVladimir Kondratiev uint i = swhead; 20352be7d22fSVladimir Kondratiev dma_addr_t pa; 20360436fd9aSVladimir Shulman int used; 20379202d7b6SMaya Erez bool mcast = (ring_index == vif->bcast_ring); 203841d6b093SVladimir Kondratiev uint len = skb_headlen(skb); 20392be7d22fSVladimir Kondratiev 204010590c6aSGidon Studinski wil_dbg_txrx(wil, "tx_ring: %d bytes to ring %d, nr_frags %d\n", 20419202d7b6SMaya Erez skb->len, ring_index, nr_frags); 20422be7d22fSVladimir Kondratiev 20435933a06dSVladimir Kondratiev if (unlikely(!txdata->enabled)) 20445933a06dSVladimir Kondratiev return -EINVAL; 20455933a06dSVladimir Kondratiev 204633c477fdSVladimir Kondratiev if (unlikely(avail < 1 + nr_frags)) { 204770801e1bSVladimir Kondratiev wil_err_ratelimited(wil, 20485b29c573SVladimir Kondratiev "Tx ring[%2d] full. No space for %d fragments\n", 20499202d7b6SMaya Erez ring_index, 1 + nr_frags); 20502be7d22fSVladimir Kondratiev return -ENOMEM; 20512be7d22fSVladimir Kondratiev } 20529202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 20532be7d22fSVladimir Kondratiev 20548fe59627SVladimir Kondratiev pa = dma_map_single(dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE); 20552be7d22fSVladimir Kondratiev 20569202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] skb %d bytes 0x%p -> %pad\n", ring_index, 20575b29c573SVladimir Kondratiev skb_headlen(skb), skb->data, &pa); 20587743882dSVladimir Kondratiev wil_hex_dump_txrx("Tx ", DUMP_PREFIX_OFFSET, 16, 1, 20592be7d22fSVladimir Kondratiev skb->data, skb_headlen(skb), false); 20602be7d22fSVladimir Kondratiev 20612be7d22fSVladimir Kondratiev if (unlikely(dma_mapping_error(dev, pa))) 20622be7d22fSVladimir Kondratiev return -EINVAL; 20639202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_single; 20642be7d22fSVladimir Kondratiev /* 1-st segment */ 20659202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, len, 20669202d7b6SMaya Erez ring_index); 206741d6b093SVladimir Kondratiev if (unlikely(mcast)) { 206841d6b093SVladimir Kondratiev d->mac.d[0] |= BIT(MAC_CFG_DESC_TX_0_MCS_EN_POS); /* MCS 0 */ 2069230d8442SVladimir Kondratiev if (unlikely(len > WIL_BCAST_MCS0_LIMIT)) /* set MCS 1 */ 207041d6b093SVladimir Kondratiev d->mac.d[0] |= (1 << MAC_CFG_DESC_TX_0_MCS_INDEX_POS); 207141d6b093SVladimir Kondratiev } 2072504937d4SKirshenbaum Erez /* Process TCP/UDP checksum offloading */ 20733d4bde15SVladimir Kondratiev if (unlikely(wil_tx_desc_offload_setup(d, skb))) { 20745b29c573SVladimir Kondratiev wil_err(wil, "Tx[%2d] Failed to set cksum, drop packet\n", 20759202d7b6SMaya Erez ring_index); 2076504937d4SKirshenbaum Erez goto dma_error; 2077504937d4SKirshenbaum Erez } 2078504937d4SKirshenbaum Erez 20799202d7b6SMaya Erez ring->ctx[i].nr_frags = nr_frags; 20803d4bde15SVladimir Kondratiev wil_tx_desc_set_nr_frags(d, nr_frags + 1); 208168ada71eSVladimir Kondratiev 20822be7d22fSVladimir Kondratiev /* middle segments */ 2083504937d4SKirshenbaum Erez for (; f < nr_frags; f++) { 2084d7840976SMatthew Wilcox (Oracle) const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; 20852be7d22fSVladimir Kondratiev int len = skb_frag_size(frag); 20868fe59627SVladimir Kondratiev 2087e59d16c0SVladimir Kondratiev *_d = *d; 20889202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 20895b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 20905b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 20919202d7b6SMaya Erez i = (swhead + f + 1) % ring->size; 20929202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 20932be7d22fSVladimir Kondratiev pa = skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), 20942be7d22fSVladimir Kondratiev DMA_TO_DEVICE); 2095e3d2ed94SHamad Kadmany if (unlikely(dma_mapping_error(dev, pa))) { 2096e3d2ed94SHamad Kadmany wil_err(wil, "Tx[%2d] failed to map fragment\n", 20979202d7b6SMaya Erez ring_index); 20982be7d22fSVladimir Kondratiev goto dma_error; 2099e3d2ed94SHamad Kadmany } 21009202d7b6SMaya Erez ring->ctx[i].mapped_as = wil_mapped_as_page; 21019202d7b6SMaya Erez wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, 21029202d7b6SMaya Erez pa, len, ring_index); 2103c236658fSVladimir Kondratiev /* no need to check return code - 2104c236658fSVladimir Kondratiev * if it succeeded for 1-st descriptor, 2105c236658fSVladimir Kondratiev * it will succeed here too 2106c236658fSVladimir Kondratiev */ 21073d4bde15SVladimir Kondratiev wil_tx_desc_offload_setup(d, skb); 21082be7d22fSVladimir Kondratiev } 21092be7d22fSVladimir Kondratiev /* for the last seg only */ 21102be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_EOP_POS); 2111668b2bbdSKirshenbaum Erez d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_MARK_WB_POS); 21122be7d22fSVladimir Kondratiev d->dma.d0 |= BIT(DMA_CFG_DESC_TX_0_CMD_DMA_IT_POS); 211368ada71eSVladimir Kondratiev *_d = *d; 21149202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] desc[%4d]\n", ring_index, i); 21155b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, 21165b29c573SVladimir Kondratiev (const void *)d, sizeof(*d), false); 21172be7d22fSVladimir Kondratiev 21186cdadd4dSVladimir Kondratiev /* hold reference to skb 21196cdadd4dSVladimir Kondratiev * to prevent skb release before accounting 21206cdadd4dSVladimir Kondratiev * in case of immediate "tx done" 21216cdadd4dSVladimir Kondratiev */ 21229202d7b6SMaya Erez ring->ctx[i].skb = skb_get(skb); 21236cdadd4dSVladimir Kondratiev 21240436fd9aSVladimir Shulman /* performance monitoring */ 21259202d7b6SMaya Erez used = wil_ring_used_tx(ring); 212610590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 21270436fd9aSVladimir Shulman used, used + nr_frags + 1)) { 21287c0acf86SVladimir Kondratiev txdata->idle += get_cycles() - txdata->last_idle; 21290436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", 21309202d7b6SMaya Erez ring_index, used, used + nr_frags + 1); 21310436fd9aSVladimir Shulman } 21327c0acf86SVladimir Kondratiev 2133eb26cff1SMaya Erez /* Make sure to advance the head only after descriptor update is done. 2134eb26cff1SMaya Erez * This will prevent a race condition where the completion thread 2135eb26cff1SMaya Erez * will see the DU bit set from previous run and will handle the 2136eb26cff1SMaya Erez * skb before it was completed. 2137eb26cff1SMaya Erez */ 2138eb26cff1SMaya Erez wmb(); 2139eb26cff1SMaya Erez 21402be7d22fSVladimir Kondratiev /* advance swhead */ 21419202d7b6SMaya Erez wil_ring_advance_head(ring, nr_frags + 1); 21429202d7b6SMaya Erez wil_dbg_txrx(wil, "Tx[%2d] swhead %d -> %d\n", ring_index, swhead, 21439202d7b6SMaya Erez ring->swhead); 21449202d7b6SMaya Erez trace_wil6210_tx(ring_index, swhead, skb->len, nr_frags); 21453d4bde15SVladimir Kondratiev 21463d4bde15SVladimir Kondratiev /* make sure all writes to descriptors (shared memory) are done before 21473d4bde15SVladimir Kondratiev * committing them to HW 21483d4bde15SVladimir Kondratiev */ 21493d4bde15SVladimir Kondratiev wmb(); 21503d4bde15SVladimir Kondratiev 2151a24a3d6aSDedy Lansky if (wil->tx_latency) 2152a24a3d6aSDedy Lansky *(ktime_t *)&skb->cb = ktime_get(); 2153a24a3d6aSDedy Lansky else 2154a24a3d6aSDedy Lansky memset(skb->cb, 0, sizeof(ktime_t)); 2155a24a3d6aSDedy Lansky 21569202d7b6SMaya Erez wil_w(wil, ring->hwtail, ring->swhead); 21572be7d22fSVladimir Kondratiev 21582be7d22fSVladimir Kondratiev return 0; 21592be7d22fSVladimir Kondratiev dma_error: 21602be7d22fSVladimir Kondratiev /* unmap what we have mapped */ 2161c2a146f6SVladimir Kondratiev nr_frags = f + 1; /* frags mapped + one for skb head */ 2162c2a146f6SVladimir Kondratiev for (f = 0; f < nr_frags; f++) { 2163c2a146f6SVladimir Kondratiev struct wil_ctx *ctx; 21647e594444SVladimir Kondratiev 21659202d7b6SMaya Erez i = (swhead + f) % ring->size; 21669202d7b6SMaya Erez ctx = &ring->ctx[i]; 21679202d7b6SMaya Erez _d = &ring->va[i].tx.legacy; 216868ada71eSVladimir Kondratiev *d = *_d; 216968ada71eSVladimir Kondratiev _d->dma.status = TX_DMA_STATUS_DU; 21709202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 21719202d7b6SMaya Erez (union wil_tx_desc *)d, 21729202d7b6SMaya Erez ctx); 2173f88f113aSVladimir Kondratiev 2174f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 21752be7d22fSVladimir Kondratiev } 21762be7d22fSVladimir Kondratiev 21772be7d22fSVladimir Kondratiev return -EINVAL; 21782be7d22fSVladimir Kondratiev } 21792be7d22fSVladimir Kondratiev 21809202d7b6SMaya Erez static int wil_tx_ring(struct wil6210_priv *wil, struct wil6210_vif *vif, 21819202d7b6SMaya Erez struct wil_ring *ring, struct sk_buff *skb) 21825933a06dSVladimir Kondratiev { 21839202d7b6SMaya Erez int ring_index = ring - wil->ring_tx; 218410590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; 21855933a06dSVladimir Kondratiev int rc; 21865933a06dSVladimir Kondratiev 21875933a06dSVladimir Kondratiev spin_lock(&txdata->lock); 21883d4bde15SVladimir Kondratiev 2189fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2190fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status) || 2191fe9ee51eSMaya Erez test_bit(wil_status_resuming, wil->status)) { 2192fe9ee51eSMaya Erez wil_dbg_txrx(wil, 2193fe9ee51eSMaya Erez "suspend/resume in progress. drop packet\n"); 2194fe9ee51eSMaya Erez spin_unlock(&txdata->lock); 2195fe9ee51eSMaya Erez return -EINVAL; 2196fe9ee51eSMaya Erez } 2197fe9ee51eSMaya Erez 21989202d7b6SMaya Erez rc = (skb_is_gso(skb) ? wil->txrx_ops.tx_ring_tso : __wil_tx_ring) 21999202d7b6SMaya Erez (wil, vif, ring, skb); 22003d4bde15SVladimir Kondratiev 22015933a06dSVladimir Kondratiev spin_unlock(&txdata->lock); 22023d4bde15SVladimir Kondratiev 22035933a06dSVladimir Kondratiev return rc; 22045933a06dSVladimir Kondratiev } 22055933a06dSVladimir Kondratiev 2206f9e3033fSDedy Lansky /** 2207f9e3033fSDedy Lansky * Check status of tx vrings and stop/wake net queues if needed 22085bd60982SLior David * It will start/stop net queues of a specific VIF net_device. 2209f9e3033fSDedy Lansky * 2210f9e3033fSDedy Lansky * This function does one of two checks: 2211f9e3033fSDedy Lansky * In case check_stop is true, will check if net queues need to be stopped. If 2212f9e3033fSDedy Lansky * the conditions for stopping are met, netif_tx_stop_all_queues() is called. 2213f9e3033fSDedy Lansky * In case check_stop is false, will check if net queues need to be waked. If 2214f9e3033fSDedy Lansky * the conditions for waking are met, netif_tx_wake_all_queues() is called. 2215f9e3033fSDedy Lansky * vring is the vring which is currently being modified by either adding 2216f9e3033fSDedy Lansky * descriptors (tx) into it or removing descriptors (tx complete) from it. Can 2217f9e3033fSDedy Lansky * be null when irrelevant (e.g. connect/disconnect events). 2218f9e3033fSDedy Lansky * 2219f9e3033fSDedy Lansky * The implementation is to stop net queues if modified vring has low 2220f9e3033fSDedy Lansky * descriptor availability. Wake if all vrings are not in low descriptor 2221f9e3033fSDedy Lansky * availability and modified vring has high descriptor availability. 2222f9e3033fSDedy Lansky */ 2223f9e3033fSDedy Lansky static inline void __wil_update_net_queues(struct wil6210_priv *wil, 22245bd60982SLior David struct wil6210_vif *vif, 222510590c6aSGidon Studinski struct wil_ring *ring, 2226f9e3033fSDedy Lansky bool check_stop) 2227f9e3033fSDedy Lansky { 2228f9e3033fSDedy Lansky int i; 2229df2b5388SMaya Erez int min_ring_id = wil_get_min_tx_ring_id(wil); 2230f9e3033fSDedy Lansky 22315bd60982SLior David if (unlikely(!vif)) 22325bd60982SLior David return; 2233f9e3033fSDedy Lansky 223410590c6aSGidon Studinski if (ring) 22355bd60982SLior David wil_dbg_txrx(wil, "vring %d, mid %d, check_stop=%d, stopped=%d", 223610590c6aSGidon Studinski (int)(ring - wil->ring_tx), vif->mid, check_stop, 22375bd60982SLior David vif->net_queue_stopped); 22385bd60982SLior David else 22395bd60982SLior David wil_dbg_txrx(wil, "check_stop=%d, mid=%d, stopped=%d", 22405bd60982SLior David check_stop, vif->mid, vif->net_queue_stopped); 22415bd60982SLior David 22420439a5e0SDedy Lansky if (ring && drop_if_ring_full) 22430439a5e0SDedy Lansky /* no need to stop/wake net queues */ 22440439a5e0SDedy Lansky return; 22450439a5e0SDedy Lansky 22465bd60982SLior David if (check_stop == vif->net_queue_stopped) 2247f9e3033fSDedy Lansky /* net queues already in desired state */ 2248f9e3033fSDedy Lansky return; 2249f9e3033fSDedy Lansky 2250f9e3033fSDedy Lansky if (check_stop) { 225110590c6aSGidon Studinski if (!ring || unlikely(wil_ring_avail_low(ring))) { 2252f9e3033fSDedy Lansky /* not enough room in the vring */ 22535bd60982SLior David netif_tx_stop_all_queues(vif_to_ndev(vif)); 22545bd60982SLior David vif->net_queue_stopped = true; 2255f9e3033fSDedy Lansky wil_dbg_txrx(wil, "netif_tx_stop called\n"); 2256f9e3033fSDedy Lansky } 2257f9e3033fSDedy Lansky return; 2258f9e3033fSDedy Lansky } 2259f9e3033fSDedy Lansky 2260fe9ee51eSMaya Erez /* Do not wake the queues in suspend flow */ 2261fe9ee51eSMaya Erez if (test_bit(wil_status_suspending, wil->status) || 2262fe9ee51eSMaya Erez test_bit(wil_status_suspended, wil->status)) 2263fe9ee51eSMaya Erez return; 2264fe9ee51eSMaya Erez 2265f9e3033fSDedy Lansky /* check wake */ 2266df2b5388SMaya Erez for (i = min_ring_id; i < WIL6210_MAX_TX_RINGS; i++) { 226710590c6aSGidon Studinski struct wil_ring *cur_ring = &wil->ring_tx[i]; 226810590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[i]; 2269f9e3033fSDedy Lansky 227010590c6aSGidon Studinski if (txdata->mid != vif->mid || !cur_ring->va || 227110590c6aSGidon Studinski !txdata->enabled || cur_ring == ring) 2272f9e3033fSDedy Lansky continue; 2273f9e3033fSDedy Lansky 227410590c6aSGidon Studinski if (wil_ring_avail_low(cur_ring)) { 227510590c6aSGidon Studinski wil_dbg_txrx(wil, "ring %d full, can't wake\n", 227610590c6aSGidon Studinski (int)(cur_ring - wil->ring_tx)); 2277f9e3033fSDedy Lansky return; 2278f9e3033fSDedy Lansky } 2279f9e3033fSDedy Lansky } 2280f9e3033fSDedy Lansky 228110590c6aSGidon Studinski if (!ring || wil_ring_avail_high(ring)) { 228210590c6aSGidon Studinski /* enough room in the ring */ 2283f9e3033fSDedy Lansky wil_dbg_txrx(wil, "calling netif_tx_wake\n"); 22845bd60982SLior David netif_tx_wake_all_queues(vif_to_ndev(vif)); 22855bd60982SLior David vif->net_queue_stopped = false; 2286f9e3033fSDedy Lansky } 2287f9e3033fSDedy Lansky } 2288f9e3033fSDedy Lansky 22895bd60982SLior David void wil_update_net_queues(struct wil6210_priv *wil, struct wil6210_vif *vif, 229010590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2291f9e3033fSDedy Lansky { 2292f9e3033fSDedy Lansky spin_lock(&wil->net_queue_lock); 229310590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2294f9e3033fSDedy Lansky spin_unlock(&wil->net_queue_lock); 2295f9e3033fSDedy Lansky } 2296f9e3033fSDedy Lansky 22975bd60982SLior David void wil_update_net_queues_bh(struct wil6210_priv *wil, struct wil6210_vif *vif, 229810590c6aSGidon Studinski struct wil_ring *ring, bool check_stop) 2299f9e3033fSDedy Lansky { 2300f9e3033fSDedy Lansky spin_lock_bh(&wil->net_queue_lock); 230110590c6aSGidon Studinski __wil_update_net_queues(wil, vif, ring, check_stop); 2302f9e3033fSDedy Lansky spin_unlock_bh(&wil->net_queue_lock); 2303f9e3033fSDedy Lansky } 2304f9e3033fSDedy Lansky 23052be7d22fSVladimir Kondratiev netdev_tx_t wil_start_xmit(struct sk_buff *skb, struct net_device *ndev) 23062be7d22fSVladimir Kondratiev { 2307e00243faSLior David struct wil6210_vif *vif = ndev_to_vif(ndev); 2308e00243faSLior David struct wil6210_priv *wil = vif_to_wil(vif); 23096d1ba32cSAhmad Masri const u8 *da = wil_skb_get_da(skb); 23106d1ba32cSAhmad Masri bool bcast = is_multicast_ether_addr(da); 23119202d7b6SMaya Erez struct wil_ring *ring; 2312aa27deaaSVladimir Kondratiev static bool pr_once_fw; 23132be7d22fSVladimir Kondratiev int rc; 23142be7d22fSVladimir Kondratiev 2315af3db60aSLazar Alexei wil_dbg_txrx(wil, "start_xmit\n"); 231633c477fdSVladimir Kondratiev if (unlikely(!test_bit(wil_status_fwready, wil->status))) { 2317aa27deaaSVladimir Kondratiev if (!pr_once_fw) { 23182be7d22fSVladimir Kondratiev wil_err(wil, "FW not ready\n"); 2319aa27deaaSVladimir Kondratiev pr_once_fw = true; 2320aa27deaaSVladimir Kondratiev } 23212be7d22fSVladimir Kondratiev goto drop; 23222be7d22fSVladimir Kondratiev } 23235bd60982SLior David if (unlikely(!test_bit(wil_vif_fwconnected, vif->status))) { 23245bd60982SLior David wil_dbg_ratelimited(wil, 23255bd60982SLior David "VIF not connected, packet dropped\n"); 23262be7d22fSVladimir Kondratiev goto drop; 23272be7d22fSVladimir Kondratiev } 2328e00243faSLior David if (unlikely(vif->wdev.iftype == NL80211_IFTYPE_MONITOR)) { 23292be7d22fSVladimir Kondratiev wil_err(wil, "Xmit in monitor mode not supported\n"); 23302be7d22fSVladimir Kondratiev goto drop; 23312be7d22fSVladimir Kondratiev } 2332aa27deaaSVladimir Kondratiev pr_once_fw = false; 2333d58db4e4SVladimir Kondratiev 23342be7d22fSVladimir Kondratiev /* find vring */ 2335e00243faSLior David if (vif->wdev.iftype == NL80211_IFTYPE_STATION && !vif->pbss) { 2336a895cb8bSLior David /* in STA mode (ESS), all to same VRING (to AP) */ 23379202d7b6SMaya Erez ring = wil_find_tx_ring_sta(wil, vif, skb); 2338a895cb8bSLior David } else if (bcast) { 2339e00243faSLior David if (vif->pbss) 2340a895cb8bSLior David /* in pbss, no bcast VRING - duplicate skb in 2341a895cb8bSLior David * all stations VRINGs 2342a895cb8bSLior David */ 23439202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2344e00243faSLior David else if (vif->wdev.iftype == NL80211_IFTYPE_AP) 2345a895cb8bSLior David /* AP has a dedicated bcast VRING */ 23469202d7b6SMaya Erez ring = wil_find_tx_bcast_1(wil, vif, skb); 2347a895cb8bSLior David else 2348a895cb8bSLior David /* unexpected combination, fallback to duplicating 2349a895cb8bSLior David * the skb in all stations VRINGs 2350a895cb8bSLior David */ 23519202d7b6SMaya Erez ring = wil_find_tx_bcast_2(wil, vif, skb); 2352a895cb8bSLior David } else { 2353a895cb8bSLior David /* unicast, find specific VRING by dest. address */ 23549202d7b6SMaya Erez ring = wil_find_tx_ucast(wil, vif, skb); 235554ed90a8SVladimir Kondratiev } 23569202d7b6SMaya Erez if (unlikely(!ring)) { 23576d1ba32cSAhmad Masri wil_dbg_txrx(wil, "No Tx RING found for %pM\n", da); 23582be7d22fSVladimir Kondratiev goto drop; 23592be7d22fSVladimir Kondratiev } 23602be7d22fSVladimir Kondratiev /* set up vring entry */ 23619202d7b6SMaya Erez rc = wil_tx_ring(wil, vif, ring, skb); 2362d58db4e4SVladimir Kondratiev 23632be7d22fSVladimir Kondratiev switch (rc) { 23642be7d22fSVladimir Kondratiev case 0: 2365f9e3033fSDedy Lansky /* shall we stop net queues? */ 23669202d7b6SMaya Erez wil_update_net_queues_bh(wil, vif, ring, true); 2367795ce734SVladimir Kondratiev /* statistics will be updated on the tx_complete */ 23682be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 23692be7d22fSVladimir Kondratiev return NETDEV_TX_OK; 23702be7d22fSVladimir Kondratiev case -ENOMEM: 23710439a5e0SDedy Lansky if (drop_if_ring_full) 23720439a5e0SDedy Lansky goto drop; 23732be7d22fSVladimir Kondratiev return NETDEV_TX_BUSY; 23742be7d22fSVladimir Kondratiev default: 2375afda8bb5SVladimir Kondratiev break; /* goto drop; */ 23762be7d22fSVladimir Kondratiev } 23772be7d22fSVladimir Kondratiev drop: 23782be7d22fSVladimir Kondratiev ndev->stats.tx_dropped++; 23792be7d22fSVladimir Kondratiev dev_kfree_skb_any(skb); 23802be7d22fSVladimir Kondratiev 23812be7d22fSVladimir Kondratiev return NET_XMIT_DROP; 23822be7d22fSVladimir Kondratiev } 23832be7d22fSVladimir Kondratiev 2384a24a3d6aSDedy Lansky void wil_tx_latency_calc(struct wil6210_priv *wil, struct sk_buff *skb, 2385a24a3d6aSDedy Lansky struct wil_sta_info *sta) 2386a24a3d6aSDedy Lansky { 2387a24a3d6aSDedy Lansky int skb_time_us; 2388a24a3d6aSDedy Lansky int bin; 2389a24a3d6aSDedy Lansky 2390a24a3d6aSDedy Lansky if (!wil->tx_latency) 2391a24a3d6aSDedy Lansky return; 2392a24a3d6aSDedy Lansky 2393a24a3d6aSDedy Lansky if (ktime_to_ms(*(ktime_t *)&skb->cb) == 0) 2394a24a3d6aSDedy Lansky return; 2395a24a3d6aSDedy Lansky 2396a24a3d6aSDedy Lansky skb_time_us = ktime_us_delta(ktime_get(), *(ktime_t *)&skb->cb); 2397a24a3d6aSDedy Lansky bin = skb_time_us / wil->tx_latency_res; 2398a24a3d6aSDedy Lansky bin = min_t(int, bin, WIL_NUM_LATENCY_BINS - 1); 2399a24a3d6aSDedy Lansky 2400a24a3d6aSDedy Lansky wil_dbg_txrx(wil, "skb time %dus => bin %d\n", skb_time_us, bin); 2401a24a3d6aSDedy Lansky sta->tx_latency_bins[bin]++; 2402a24a3d6aSDedy Lansky sta->stats.tx_latency_total_us += skb_time_us; 2403a24a3d6aSDedy Lansky if (skb_time_us < sta->stats.tx_latency_min_us) 2404a24a3d6aSDedy Lansky sta->stats.tx_latency_min_us = skb_time_us; 2405a24a3d6aSDedy Lansky if (skb_time_us > sta->stats.tx_latency_max_us) 2406a24a3d6aSDedy Lansky sta->stats.tx_latency_max_us = skb_time_us; 2407a24a3d6aSDedy Lansky } 2408a24a3d6aSDedy Lansky 24092be7d22fSVladimir Kondratiev /** 24102be7d22fSVladimir Kondratiev * Clean up transmitted skb's from the Tx VRING 24112be7d22fSVladimir Kondratiev * 2412e0287c4aSVladimir Kondratiev * Return number of descriptors cleared 2413e0287c4aSVladimir Kondratiev * 24142be7d22fSVladimir Kondratiev * Safe to call from IRQ 24152be7d22fSVladimir Kondratiev */ 24165bd60982SLior David int wil_tx_complete(struct wil6210_vif *vif, int ringid) 24172be7d22fSVladimir Kondratiev { 24185bd60982SLior David struct wil6210_priv *wil = vif_to_wil(vif); 24195bd60982SLior David struct net_device *ndev = vif_to_ndev(vif); 24202be7d22fSVladimir Kondratiev struct device *dev = wil_to_dev(wil); 242110590c6aSGidon Studinski struct wil_ring *vring = &wil->ring_tx[ringid]; 242210590c6aSGidon Studinski struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ringid]; 2423e0287c4aSVladimir Kondratiev int done = 0; 242410590c6aSGidon Studinski int cid = wil->ring2cid_tid[ringid][0]; 242541d6b093SVladimir Kondratiev struct wil_net_stats *stats = NULL; 2426c236658fSVladimir Kondratiev volatile struct vring_tx_desc *_d; 24270436fd9aSVladimir Shulman int used_before_complete; 24280436fd9aSVladimir Shulman int used_new; 24292be7d22fSVladimir Kondratiev 243033c477fdSVladimir Kondratiev if (unlikely(!vring->va)) { 24312be7d22fSVladimir Kondratiev wil_err(wil, "Tx irq[%d]: vring not initialized\n", ringid); 2432e0287c4aSVladimir Kondratiev return 0; 24332be7d22fSVladimir Kondratiev } 24342be7d22fSVladimir Kondratiev 243533c477fdSVladimir Kondratiev if (unlikely(!txdata->enabled)) { 2436097638a0SVladimir Kondratiev wil_info(wil, "Tx irq[%d]: vring disabled\n", ringid); 2437097638a0SVladimir Kondratiev return 0; 2438097638a0SVladimir Kondratiev } 2439097638a0SVladimir Kondratiev 2440af3db60aSLazar Alexei wil_dbg_txrx(wil, "tx_complete: (%d)\n", ringid); 24412be7d22fSVladimir Kondratiev 244210590c6aSGidon Studinski used_before_complete = wil_ring_used_tx(vring); 24430436fd9aSVladimir Shulman 2444ddf7afddSAhmad Masri if (cid < wil->max_assoc_sta) 244541d6b093SVladimir Kondratiev stats = &wil->sta[cid].stats; 244641d6b093SVladimir Kondratiev 244710590c6aSGidon Studinski while (!wil_ring_is_empty(vring)) { 2448c236658fSVladimir Kondratiev int new_swtail; 2449c236658fSVladimir Kondratiev struct wil_ctx *ctx = &vring->ctx[vring->swtail]; 2450c236658fSVladimir Kondratiev /** 2451c236658fSVladimir Kondratiev * For the fragmented skb, HW will set DU bit only for the 24523d4bde15SVladimir Kondratiev * last fragment. look for it. 24533d4bde15SVladimir Kondratiev * In TSO the first DU will include hdr desc 2454c236658fSVladimir Kondratiev */ 2455c236658fSVladimir Kondratiev int lf = (vring->swtail + ctx->nr_frags) % vring->size; 2456c236658fSVladimir Kondratiev /* TODO: check we are not past head */ 2457c236658fSVladimir Kondratiev 245810590c6aSGidon Studinski _d = &vring->va[lf].tx.legacy; 245933c477fdSVladimir Kondratiev if (unlikely(!(_d->dma.status & TX_DMA_STATUS_DU))) 2460c236658fSVladimir Kondratiev break; 2461c236658fSVladimir Kondratiev 2462c236658fSVladimir Kondratiev new_swtail = (lf + 1) % vring->size; 2463c236658fSVladimir Kondratiev while (vring->swtail != new_swtail) { 24644de41befSVladimir Kondratiev struct vring_tx_desc dd, *d = ⅆ 24657e594444SVladimir Kondratiev u16 dmalen; 246676dfa4b7SVladimir Kondratiev struct sk_buff *skb; 246776dfa4b7SVladimir Kondratiev 246876dfa4b7SVladimir Kondratiev ctx = &vring->ctx[vring->swtail]; 246976dfa4b7SVladimir Kondratiev skb = ctx->skb; 247010590c6aSGidon Studinski _d = &vring->va[vring->swtail].tx.legacy; 24714de41befSVladimir Kondratiev 247268ada71eSVladimir Kondratiev *d = *_d; 24734de41befSVladimir Kondratiev 24747e594444SVladimir Kondratiev dmalen = le16_to_cpu(d->dma.length); 247598658095SVladimir Kondratiev trace_wil6210_tx_done(ringid, vring->swtail, dmalen, 247698658095SVladimir Kondratiev d->dma.error); 24777743882dSVladimir Kondratiev wil_dbg_txrx(wil, 24785b29c573SVladimir Kondratiev "TxC[%2d][%3d] : %d bytes, status 0x%02x err 0x%02x\n", 24795b29c573SVladimir Kondratiev ringid, vring->swtail, dmalen, 24805b29c573SVladimir Kondratiev d->dma.status, d->dma.error); 24815b29c573SVladimir Kondratiev wil_hex_dump_txrx("TxCD ", DUMP_PREFIX_NONE, 32, 4, 24822be7d22fSVladimir Kondratiev (const void *)d, sizeof(*d), false); 24832be7d22fSVladimir Kondratiev 24849202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap(dev, 24859202d7b6SMaya Erez (union wil_tx_desc *)d, 24869202d7b6SMaya Erez ctx); 2487f88f113aSVladimir Kondratiev 24882be7d22fSVladimir Kondratiev if (skb) { 248933c477fdSVladimir Kondratiev if (likely(d->dma.error == 0)) { 2490795ce734SVladimir Kondratiev ndev->stats.tx_packets++; 2491795ce734SVladimir Kondratiev ndev->stats.tx_bytes += skb->len; 249241d6b093SVladimir Kondratiev if (stats) { 249341d6b093SVladimir Kondratiev stats->tx_packets++; 2494c8b78b5fSVladimir Kondratiev stats->tx_bytes += skb->len; 2495a24a3d6aSDedy Lansky 2496a24a3d6aSDedy Lansky wil_tx_latency_calc(wil, skb, 2497a24a3d6aSDedy Lansky &wil->sta[cid]); 249841d6b093SVladimir Kondratiev } 2499795ce734SVladimir Kondratiev } else { 2500795ce734SVladimir Kondratiev ndev->stats.tx_errors++; 250141d6b093SVladimir Kondratiev if (stats) 2502c8b78b5fSVladimir Kondratiev stats->tx_errors++; 2503795ce734SVladimir Kondratiev } 250442fe1e51SAhmad Masri 250542fe1e51SAhmad Masri if (skb->protocol == cpu_to_be16(ETH_P_PAE)) 250642fe1e51SAhmad Masri wil_tx_complete_handle_eapol(vif, skb); 250742fe1e51SAhmad Masri 2508713c8a29SVladimir Kondratiev wil_consume_skb(skb, d->dma.error == 0); 25092be7d22fSVladimir Kondratiev } 2510f88f113aSVladimir Kondratiev memset(ctx, 0, sizeof(*ctx)); 2511eb26cff1SMaya Erez /* Make sure the ctx is zeroed before updating the tail 251210590c6aSGidon Studinski * to prevent a case where wil_tx_ring will see 2513eb26cff1SMaya Erez * this descriptor as used and handle it before ctx zero 2514eb26cff1SMaya Erez * is completed. 2515eb26cff1SMaya Erez */ 2516eb26cff1SMaya Erez wmb(); 2517c236658fSVladimir Kondratiev /* There is no need to touch HW descriptor: 251803269c65SVladimir Kondratiev * - ststus bit TX_DMA_STATUS_DU is set by design, 251903269c65SVladimir Kondratiev * so hardware will not try to process this desc., 252003269c65SVladimir Kondratiev * - rest of descriptor will be initialized on Tx. 252103269c65SVladimir Kondratiev */ 252210590c6aSGidon Studinski vring->swtail = wil_ring_next_tail(vring); 2523e0287c4aSVladimir Kondratiev done++; 25242be7d22fSVladimir Kondratiev } 2525c236658fSVladimir Kondratiev } 252667c3e1b4SVladimir Kondratiev 25270436fd9aSVladimir Shulman /* performance monitoring */ 252810590c6aSGidon Studinski used_new = wil_ring_used_tx(vring); 252910590c6aSGidon Studinski if (wil_val_in_range(wil->ring_idle_trsh, 25300436fd9aSVladimir Shulman used_new, used_before_complete)) { 25310436fd9aSVladimir Shulman wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", 25320436fd9aSVladimir Shulman ringid, used_before_complete, used_new); 25337c0acf86SVladimir Kondratiev txdata->last_idle = get_cycles(); 25347c0acf86SVladimir Kondratiev } 253567c3e1b4SVladimir Kondratiev 2536f9e3033fSDedy Lansky /* shall we wake net queues? */ 2537f9e3033fSDedy Lansky if (done) 25385bd60982SLior David wil_update_net_queues(wil, vif, vring, false); 2539e0287c4aSVladimir Kondratiev 2540e0287c4aSVladimir Kondratiev return done; 25412be7d22fSVladimir Kondratiev } 254296c93589SGidon Studinski 254396c93589SGidon Studinski static inline int wil_tx_init(struct wil6210_priv *wil) 254496c93589SGidon Studinski { 254596c93589SGidon Studinski return 0; 254696c93589SGidon Studinski } 254796c93589SGidon Studinski 254896c93589SGidon Studinski static inline void wil_tx_fini(struct wil6210_priv *wil) {} 254996c93589SGidon Studinski 25507be13fc3SGidon Studinski static void wil_get_reorder_params(struct wil6210_priv *wil, 25517be13fc3SGidon Studinski struct sk_buff *skb, int *tid, int *cid, 25521bd82ee0SDedy Lansky int *mid, u16 *seq, int *mcast, int *retry) 25537be13fc3SGidon Studinski { 25547be13fc3SGidon Studinski struct vring_rx_desc *d = wil_skb_rxdesc(skb); 25557be13fc3SGidon Studinski 25567be13fc3SGidon Studinski *tid = wil_rxdesc_tid(d); 2557bf0353a6SAhmad Masri *cid = wil_skb_get_cid(skb); 25587be13fc3SGidon Studinski *mid = wil_rxdesc_mid(d); 25597be13fc3SGidon Studinski *seq = wil_rxdesc_seq(d); 25607be13fc3SGidon Studinski *mcast = wil_rxdesc_mcast(d); 25611bd82ee0SDedy Lansky *retry = wil_rxdesc_retry(d); 25627be13fc3SGidon Studinski } 25637be13fc3SGidon Studinski 256496c93589SGidon Studinski void wil_init_txrx_ops_legacy_dma(struct wil6210_priv *wil) 256596c93589SGidon Studinski { 256696c93589SGidon Studinski wil->txrx_ops.configure_interrupt_moderation = 256796c93589SGidon Studinski wil_configure_interrupt_moderation; 256896c93589SGidon Studinski /* TX ops */ 25699202d7b6SMaya Erez wil->txrx_ops.tx_desc_map = wil_tx_desc_map; 25709202d7b6SMaya Erez wil->txrx_ops.tx_desc_unmap = wil_txdesc_unmap; 25719202d7b6SMaya Erez wil->txrx_ops.tx_ring_tso = __wil_tx_vring_tso; 257296c93589SGidon Studinski wil->txrx_ops.ring_init_tx = wil_vring_init_tx; 257396c93589SGidon Studinski wil->txrx_ops.ring_fini_tx = wil_vring_free; 257496c93589SGidon Studinski wil->txrx_ops.ring_init_bcast = wil_vring_init_bcast; 257596c93589SGidon Studinski wil->txrx_ops.tx_init = wil_tx_init; 257696c93589SGidon Studinski wil->txrx_ops.tx_fini = wil_tx_fini; 2577b9010f10SAhmad Masri wil->txrx_ops.tx_ring_modify = wil_tx_vring_modify; 257896c93589SGidon Studinski /* RX ops */ 257996c93589SGidon Studinski wil->txrx_ops.rx_init = wil_rx_init; 25807be13fc3SGidon Studinski wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp; 25817be13fc3SGidon Studinski wil->txrx_ops.get_reorder_params = wil_get_reorder_params; 25827be13fc3SGidon Studinski wil->txrx_ops.get_netif_rx_params = 25837be13fc3SGidon Studinski wil_get_netif_rx_params; 25847be13fc3SGidon Studinski wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check; 2585e15af41cSDedy Lansky wil->txrx_ops.rx_error_check = wil_rx_error_check; 25867be13fc3SGidon Studinski wil->txrx_ops.is_rx_idle = wil_is_rx_idle; 258796c93589SGidon Studinski wil->txrx_ops.rx_fini = wil_rx_fini; 258896c93589SGidon Studinski } 2589