diff options
Diffstat (limited to 'drivers/net/wireless/ath/wil6210/txrx_edma.c')
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/txrx_edma.c | 1613 |
1 files changed, 1613 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wil6210/txrx_edma.c b/drivers/net/wireless/ath/wil6210/txrx_edma.c new file mode 100644 index 0000000..3e7fc29 --- /dev/null +++ b/drivers/net/wireless/ath/wil6210/txrx_edma.c @@ -0,0 +1,1613 @@ +/* + * Copyright (c) 2012-2018 The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/etherdevice.h> +#include <linux/moduleparam.h> +#include <linux/prefetch.h> +#include <linux/types.h> +#include <linux/list.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include "wil6210.h" +#include "txrx_edma.h" +#include "txrx.h" +#include "trace.h" + +#define WIL_EDMA_MAX_DATA_OFFSET (2) +/* RX buffer size must be aligned to 4 bytes */ +#define WIL_EDMA_RX_BUF_LEN_DEFAULT (2048) + +static void wil_tx_desc_unmap_edma(struct device *dev, + union wil_tx_desc *desc, + struct wil_ctx *ctx) +{ + struct wil_tx_enhanced_desc *d = (struct wil_tx_enhanced_desc *)desc; + dma_addr_t pa = wil_tx_desc_get_addr_edma(&d->dma); + u16 dmalen = le16_to_cpu(d->dma.length); + + switch (ctx->mapped_as) { + case wil_mapped_as_single: + dma_unmap_single(dev, pa, dmalen, DMA_TO_DEVICE); + break; + case wil_mapped_as_page: + dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE); + break; + default: + break; + } +} + +static int wil_find_free_sring(struct wil6210_priv *wil) +{ + int i; + + for (i = 0; i < WIL6210_MAX_STATUS_RINGS; i++) { + if (!wil->srings[i].va) + return i; + } + + return -EINVAL; +} + +static void wil_sring_free(struct wil6210_priv *wil, + struct wil_status_ring *sring) +{ + struct device *dev = wil_to_dev(wil); + size_t sz; + + if (!sring || !sring->va) + return; + + sz = sring->elem_size * sring->size; + + wil_dbg_misc(wil, "status_ring_free, size(bytes)=%zu, 0x%p:%pad\n", + sz, sring->va, &sring->pa); + + dma_free_coherent(dev, sz, (void *)sring->va, sring->pa); + sring->pa = 0; + sring->va = NULL; +} + +static int wil_sring_alloc(struct wil6210_priv *wil, + struct wil_status_ring *sring) +{ + struct device *dev = wil_to_dev(wil); + size_t sz = sring->elem_size * sring->size; + + wil_dbg_misc(wil, "status_ring_alloc: size=%zu\n", sz); + + if (sz == 0) { + wil_err(wil, "Cannot allocate a zero size status ring\n"); + return -EINVAL; + } + + sring->swhead = 0; + + /* Status messages are allocated and initialized to 0. This is necessary + * since DR bit should be initialized to 0. + */ + sring->va = dma_zalloc_coherent(dev, sz, &sring->pa, GFP_KERNEL); + if (!sring->va) + return -ENOMEM; + + wil_dbg_misc(wil, "status_ring[%d] 0x%p:%pad\n", sring->size, sring->va, + &sring->pa); + + return 0; +} + +static int wil_tx_init_edma(struct wil6210_priv *wil) +{ + int ring_id = wil_find_free_sring(wil); + struct wil_status_ring *sring; + int rc; + u16 status_ring_size; + + if (wil->tx_status_ring_order < WIL_SRING_SIZE_ORDER_MIN || + wil->tx_status_ring_order > WIL_SRING_SIZE_ORDER_MAX) + wil->tx_status_ring_order = WIL_TX_SRING_SIZE_ORDER_DEFAULT; + + status_ring_size = 1 << wil->tx_status_ring_order; + + wil_dbg_misc(wil, "init TX sring: size=%u, ring_id=%u\n", + status_ring_size, ring_id); + + if (ring_id < 0) + return ring_id; + + /* Allocate Tx status ring. Tx descriptor rings will be + * allocated on WMI connect event + */ + sring = &wil->srings[ring_id]; + + sring->is_rx = false; + sring->size = status_ring_size; + sring->elem_size = sizeof(struct wil_ring_tx_status); + rc = wil_sring_alloc(wil, sring); + if (rc) + return rc; + + rc = wil_wmi_tx_sring_cfg(wil, ring_id); + if (rc) + goto out_free; + + sring->desc_rdy_pol = 1; + wil->tx_sring_idx = ring_id; + + return 0; +out_free: + wil_sring_free(wil, sring); + return rc; +} + +/** + * Allocate one skb for Rx descriptor RING + */ +static int wil_ring_alloc_skb_edma(struct wil6210_priv *wil, + struct wil_ring *ring, u32 i) +{ + struct device *dev = wil_to_dev(wil); + unsigned int sz = ALIGN(wil->rx_buf_len, 4); + dma_addr_t pa; + u16 buff_id; + struct list_head *active = &wil->rx_buff_mgmt.active; + struct list_head *free = &wil->rx_buff_mgmt.free; + struct wil_rx_buff *rx_buff; + struct wil_rx_buff *buff_arr = wil->rx_buff_mgmt.buff_arr; + struct sk_buff *skb; + struct wil_rx_enhanced_desc dd, *d = ⅆ + struct wil_rx_enhanced_desc *_d = (struct wil_rx_enhanced_desc *) + &ring->va[i].rx.enhanced; + + if (unlikely(list_empty(free))) { + wil->rx_buff_mgmt.free_list_empty_cnt++; + return -EAGAIN; + } + + skb = dev_alloc_skb(sz); + if (unlikely(!skb)) + return -ENOMEM; + + skb_put(skb, sz); + + /** + * Make sure that the network stack calculates checksum for packets + * which failed the HW checksum calculation + */ + skb->ip_summed = CHECKSUM_NONE; + + pa = dma_map_single(dev, skb->data, skb->len, DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(dev, pa))) { + kfree_skb(skb); + return -ENOMEM; + } + + /* Get the buffer ID - the index of the rx buffer in the buff_arr */ + rx_buff = list_first_entry(free, struct wil_rx_buff, list); + buff_id = rx_buff->id; + + /* Move a buffer from the free list to the active list */ + list_move(&rx_buff->list, active); + + buff_arr[buff_id].skb = skb; + + wil_desc_set_addr_edma(&d->dma.addr, &d->dma.addr_high_high, pa); + d->dma.length = cpu_to_le16(sz); + d->mac.buff_id = cpu_to_le16(buff_id); + *_d = *d; + + /* Save the physical address in skb->cb for later use in dma_unmap */ + memcpy(skb->cb, &pa, sizeof(pa)); + + return 0; +} + +static inline +void wil_get_next_rx_status_msg(struct wil_status_ring *sring, void *msg) +{ + memcpy(msg, (void *)(sring->va + (sring->elem_size * sring->swhead)), + sring->elem_size); +} + +static inline void wil_sring_advance_swhead(struct wil_status_ring *sring) +{ + sring->swhead = (sring->swhead + 1) % sring->size; + if (sring->swhead == 0) + sring->desc_rdy_pol = 1 - sring->desc_rdy_pol; +} + +static int wil_rx_refill_edma(struct wil6210_priv *wil) +{ + struct wil_ring *ring = &wil->ring_rx; + u32 next_head; + int rc = 0; + u32 swtail = *ring->edma_rx_swtail.va; + + for (; next_head = wil_ring_next_head(ring), (next_head != swtail); + ring->swhead = next_head) { + rc = wil_ring_alloc_skb_edma(wil, ring, ring->swhead); + if (unlikely(rc)) { + if (rc == -EAGAIN) + wil_dbg_txrx(wil, "No free buffer ID found\n"); + else + wil_err_ratelimited(wil, + "Error %d in refill desc[%d]\n", + rc, ring->swhead); + break; + } + } + + /* make sure all writes to descriptors (shared memory) are done before + * committing them to HW + */ + wmb(); + + wil_w(wil, ring->hwtail, ring->swhead); + + return rc; +} + +static void wil_move_all_rx_buff_to_free_list(struct wil6210_priv *wil, + struct wil_ring *ring) +{ + struct device *dev = wil_to_dev(wil); + u32 next_tail; + u32 swhead = (ring->swhead + 1) % ring->size; + dma_addr_t pa; + u16 dmalen; + + for (; next_tail = wil_ring_next_tail(ring), (next_tail != swhead); + ring->swtail = next_tail) { + struct wil_rx_enhanced_desc dd, *d = ⅆ + struct wil_rx_enhanced_desc *_d = + (struct wil_rx_enhanced_desc *) + &ring->va[ring->swtail].rx.enhanced; + struct sk_buff *skb; + u16 buff_id; + + *d = *_d; + + /* Extract the SKB from the rx_buff management array */ + buff_id = __le16_to_cpu(d->mac.buff_id); + if (buff_id >= wil->rx_buff_mgmt.size) { + wil_err(wil, "invalid buff_id %d\n", buff_id); + continue; + } + skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb; + wil->rx_buff_mgmt.buff_arr[buff_id].skb = NULL; + if (unlikely(!skb)) { + wil_err(wil, "No Rx skb at buff_id %d\n", buff_id); + } else { + pa = wil_rx_desc_get_addr_edma(&d->dma); + dmalen = le16_to_cpu(d->dma.length); + dma_unmap_single(dev, pa, dmalen, DMA_FROM_DEVICE); + + kfree_skb(skb); + } + + /* Move the buffer from the active to the free list */ + list_move(&wil->rx_buff_mgmt.buff_arr[buff_id].list, + &wil->rx_buff_mgmt.free); + } +} + +static void wil_free_rx_buff_arr(struct wil6210_priv *wil) +{ + struct wil_ring *ring = &wil->ring_rx; + + if (!wil->rx_buff_mgmt.buff_arr) + return; + + /* Move all the buffers to the free list in case active list is + * not empty in order to release all SKBs before deleting the array + */ + wil_move_all_rx_buff_to_free_list(wil, ring); + + kfree(wil->rx_buff_mgmt.buff_arr); + wil->rx_buff_mgmt.buff_arr = NULL; +} + +static int wil_init_rx_buff_arr(struct wil6210_priv *wil, + size_t size) +{ + struct wil_rx_buff *buff_arr; + struct list_head *active = &wil->rx_buff_mgmt.active; + struct list_head *free = &wil->rx_buff_mgmt.free; + int i; + + wil->rx_buff_mgmt.buff_arr = kcalloc(size, sizeof(struct wil_rx_buff), + GFP_KERNEL); + if (!wil->rx_buff_mgmt.buff_arr) + return -ENOMEM; + + /* Set list heads */ + INIT_LIST_HEAD(active); + INIT_LIST_HEAD(free); + + /* Linkify the list */ + buff_arr = wil->rx_buff_mgmt.buff_arr; + for (i = 0; i < size; i++) { + list_add(&buff_arr[i].list, free); + buff_arr[i].id = i; + } + + wil->rx_buff_mgmt.size = size; + + return 0; +} + +static int wil_init_rx_sring(struct wil6210_priv *wil, + u16 status_ring_size, + size_t elem_size, + u16 ring_id) +{ + struct wil_status_ring *sring = &wil->srings[ring_id]; + int rc; + + wil_dbg_misc(wil, "init RX sring: size=%u, ring_id=%u\n", sring->size, + ring_id); + + memset(&sring->rx_data, 0, sizeof(sring->rx_data)); + + sring->is_rx = true; + sring->size = status_ring_size; + sring->elem_size = elem_size; + rc = wil_sring_alloc(wil, sring); + if (rc) + return rc; + + rc = wil_wmi_rx_sring_add(wil, ring_id); + if (rc) + goto out_free; + + sring->desc_rdy_pol = 1; + + return 0; +out_free: + wil_sring_free(wil, sring); + return rc; +} + +static int wil_ring_alloc_desc_ring(struct wil6210_priv *wil, + struct wil_ring *ring) +{ + struct device *dev = wil_to_dev(wil); + size_t sz = ring->size * sizeof(ring->va[0]); + + wil_dbg_misc(wil, "alloc_desc_ring:\n"); + + BUILD_BUG_ON(sizeof(ring->va[0]) != 32); + + ring->swhead = 0; + ring->swtail = 0; + ring->ctx = kcalloc(ring->size, sizeof(ring->ctx[0]), GFP_KERNEL); + if (!ring->ctx) + goto err; + + ring->va = dma_zalloc_coherent(dev, sz, &ring->pa, GFP_KERNEL); + if (!ring->va) + goto err_free_ctx; + + if (ring->is_rx) { + sz = sizeof(*ring->edma_rx_swtail.va); + ring->edma_rx_swtail.va = + dma_zalloc_coherent(dev, sz, &ring->edma_rx_swtail.pa, + GFP_KERNEL); + if (!ring->edma_rx_swtail.va) + goto err_free_va; + } + + wil_dbg_misc(wil, "%s ring[%d] 0x%p:%pad 0x%p\n", + ring->is_rx ? "RX" : "TX", + ring->size, ring->va, &ring->pa, ring->ctx); + + return 0; +err_free_va: + dma_free_coherent(dev, ring->size * sizeof(ring->va[0]), + (void *)ring->va, ring->pa); + ring->va = NULL; +err_free_ctx: + kfree(ring->ctx); + ring->ctx = NULL; +err: + return -ENOMEM; +} + +static void wil_ring_free_edma(struct wil6210_priv *wil, struct wil_ring *ring) +{ + struct device *dev = wil_to_dev(wil); + size_t sz; + int ring_index = 0; + + if (!ring->va) + return; + + sz = ring->size * sizeof(ring->va[0]); + + lockdep_assert_held(&wil->mutex); + if (ring->is_rx) { + wil_dbg_misc(wil, "free Rx ring [%d] 0x%p:%pad 0x%p\n", + ring->size, ring->va, + &ring->pa, ring->ctx); + + wil_move_all_rx_buff_to_free_list(wil, ring); + goto out; + } + + /* TX ring */ + ring_index = ring - wil->ring_tx; + + wil_dbg_misc(wil, "free Tx ring %d [%d] 0x%p:%pad 0x%p\n", + ring_index, ring->size, ring->va, + &ring->pa, ring->ctx); + + while (!wil_ring_is_empty(ring)) { + struct wil_ctx *ctx; + + struct wil_tx_enhanced_desc dd, *d = ⅆ + struct wil_tx_enhanced_desc *_d = + (struct wil_tx_enhanced_desc *) + &ring->va[ring->swtail].tx.enhanced; + + ctx = &ring->ctx[ring->swtail]; + if (!ctx) { + wil_dbg_txrx(wil, + "ctx(%d) was already completed\n", + ring->swtail); + ring->swtail = wil_ring_next_tail(ring); + continue; + } + *d = *_d; + wil_tx_desc_unmap_edma(dev, (union wil_tx_desc *)d, ctx); + if (ctx->skb) + dev_kfree_skb_any(ctx->skb); + ring->swtail = wil_ring_next_tail(ring); + } + +out: + dma_free_coherent(dev, sz, (void *)ring->va, ring->pa); + kfree(ring->ctx); + ring->pa = 0; + ring->va = NULL; + ring->ctx = NULL; +} + +static int wil_init_rx_desc_ring(struct wil6210_priv *wil, u16 desc_ring_size, + int status_ring_id) +{ + struct wil_ring *ring = &wil->ring_rx; + int rc; + + wil_dbg_misc(wil, "init RX desc ring\n"); + + ring->size = desc_ring_size; + ring->is_rx = true; + rc = wil_ring_alloc_desc_ring(wil, ring); + if (rc) + return rc; + + rc = wil_wmi_rx_desc_ring_add(wil, status_ring_id); + if (rc) + goto out_free; + + return 0; +out_free: + wil_ring_free_edma(wil, ring); + return rc; +} + +static void wil_get_reorder_params_edma(struct wil6210_priv *wil, + struct sk_buff *skb, int *tid, + int *cid, int *mid, u16 *seq, + int *mcast, int *retry) +{ + struct wil_rx_status_extended *s = wil_skb_rxstatus(skb); + + *tid = wil_rx_status_get_tid(s); + *cid = wil_rx_status_get_cid(s); + *mid = wil_rx_status_get_mid(s); + *seq = le16_to_cpu(wil_rx_status_get_seq(wil, s)); + *mcast = wil_rx_status_get_mcast(s); + *retry = wil_rx_status_get_retry(s); +} + +static void wil_get_netif_rx_params_edma(struct sk_buff *skb, int *cid, + int *security) +{ + struct wil_rx_status_extended *s = wil_skb_rxstatus(skb); + + *cid = wil_rx_status_get_cid(s); + *security = wil_rx_status_get_security(s); +} + +static int wil_rx_crypto_check_edma(struct wil6210_priv *wil, + struct sk_buff *skb) +{ + struct wil_rx_status_extended *st; + int cid, tid, key_id, mc; + struct wil_sta_info *s; + struct wil_tid_crypto_rx *c; + struct wil_tid_crypto_rx_single *cc; + const u8 *pn; + + /* In HW reorder, HW is responsible for crypto check */ + if (wil->use_rx_hw_reordering) + return 0; + + st = wil_skb_rxstatus(skb); + + cid = wil_rx_status_get_cid(st); + tid = wil_rx_status_get_tid(st); + key_id = wil_rx_status_get_key_id(st); + mc = wil_rx_status_get_mcast(st); + s = &wil->sta[cid]; + c = mc ? &s->group_crypto_rx : &s->tid_crypto_rx[tid]; + cc = &c->key_id[key_id]; + pn = (u8 *)&st->ext.pn_15_0; + + if (!cc->key_set) { + wil_err_ratelimited(wil, + "Key missing. CID %d TID %d MCast %d KEY_ID %d\n", + cid, tid, mc, key_id); + return -EINVAL; + } + + if (reverse_memcmp(pn, cc->pn, IEEE80211_GCMP_PN_LEN) <= 0) { + wil_err_ratelimited(wil, + "Replay attack. CID %d TID %d MCast %d KEY_ID %d PN %6phN last %6phN\n", + cid, tid, mc, key_id, pn, cc->pn); + return -EINVAL; + } + memcpy(cc->pn, pn, IEEE80211_GCMP_PN_LEN); + + return 0; +} + +static bool wil_is_rx_idle_edma(struct wil6210_priv *wil) +{ + struct wil_status_ring *sring; + struct wil_rx_status_extended msg1; + void *msg = &msg1; + u8 dr_bit; + int i; + + for (i = 0; i < wil->num_rx_status_rings; i++) { + sring = &wil->srings[i]; + if (!sring->va) + continue; + + wil_get_next_rx_status_msg(sring, msg); + dr_bit = wil_rx_status_get_desc_rdy_bit(msg); + + /* Check if there are unhandled RX status messages */ + if (dr_bit == sring->desc_rdy_pol) + return false; + } + + return true; +} + +static void wil_rx_buf_len_init_edma(struct wil6210_priv *wil) +{ + wil->rx_buf_len = rx_large_buf ? + WIL_MAX_ETH_MTU : WIL_EDMA_RX_BUF_LEN_DEFAULT; +} + +static int wil_rx_init_edma(struct wil6210_priv *wil, u16 desc_ring_size) +{ + u16 status_ring_size; + struct wil_ring *ring = &wil->ring_rx; + int rc; + size_t elem_size = wil->use_compressed_rx_status ? + sizeof(struct wil_rx_status_compressed) : + sizeof(struct wil_rx_status_extended); + int i; + u16 max_rx_pl_per_desc; + + /* In SW reorder one must use extended status messages */ + if (wil->use_compressed_rx_status && !wil->use_rx_hw_reordering) { + wil_err(wil, + "compressed RX status cannot be used with SW reorder\n"); + return -EINVAL; + } + + if (wil->rx_status_ring_order < WIL_SRING_SIZE_ORDER_MIN || + wil->rx_status_ring_order > WIL_SRING_SIZE_ORDER_MAX) + wil->rx_status_ring_order = WIL_RX_SRING_SIZE_ORDER_DEFAULT; + + status_ring_size = 1 << wil->rx_status_ring_order; + + wil_dbg_misc(wil, + "rx_init, desc_ring_size=%u, status_ring_size=%u, elem_size=%zu\n", + desc_ring_size, status_ring_size, elem_size); + + wil_rx_buf_len_init_edma(wil); + + max_rx_pl_per_desc = ALIGN(wil->rx_buf_len, 4); + + /* Use debugfs dbg_num_rx_srings if set, reserve one sring for TX */ + if (wil->num_rx_status_rings > WIL6210_MAX_STATUS_RINGS - 1) + wil->num_rx_status_rings = WIL6210_MAX_STATUS_RINGS - 1; + + wil_dbg_misc(wil, "rx_init: allocate %d status rings\n", + wil->num_rx_status_rings); + + rc = wil_wmi_cfg_def_rx_offload(wil, max_rx_pl_per_desc); + if (rc) + return rc; + + /* Allocate status ring */ + for (i = 0; i < wil->num_rx_status_rings; i++) { + int sring_id = wil_find_free_sring(wil); + + if (sring_id < 0) { + rc = -EFAULT; + goto err_free_status; + } + rc = wil_init_rx_sring(wil, status_ring_size, elem_size, + sring_id); + if (rc) + goto err_free_status; + } + + /* Allocate descriptor ring */ + rc = wil_init_rx_desc_ring(wil, desc_ring_size, + WIL_DEFAULT_RX_STATUS_RING_ID); + if (rc) + goto err_free_status; + + if (wil->rx_buff_id_count >= status_ring_size) { + wil_info(wil, + "rx_buff_id_count %d exceeds sring_size %d. set it to %d\n", + wil->rx_buff_id_count, status_ring_size, + status_ring_size - 1); + wil->rx_buff_id_count = status_ring_size - 1; + } + + /* Allocate Rx buffer array */ + rc = wil_init_rx_buff_arr(wil, wil->rx_buff_id_count); + if (rc) + goto err_free_desc; + + /* Fill descriptor ring with credits */ + rc = wil_rx_refill_edma(wil); + if (rc) + goto err_free_rx_buff_arr; + + return 0; +err_free_rx_buff_arr: + wil_free_rx_buff_arr(wil); +err_free_desc: + wil_ring_free_edma(wil, ring); +err_free_status: + for (i = 0; i < wil->num_rx_status_rings; i++) + wil_sring_free(wil, &wil->srings[i]); + + return rc; +} + +static int wil_ring_init_tx_edma(struct wil6210_vif *vif, int ring_id, + int size, int cid, int tid) +{ + struct wil6210_priv *wil = vif_to_wil(vif); + int rc; + struct wil_ring *ring = &wil->ring_tx[ring_id]; + struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; + + lockdep_assert_held(&wil->mutex); + + wil_dbg_misc(wil, + "init TX ring: ring_id=%u, cid=%u, tid=%u, sring_id=%u\n", + ring_id, cid, tid, wil->tx_sring_idx); + + wil_tx_data_init(txdata); + ring->size = size; + rc = wil_ring_alloc_desc_ring(wil, ring); + if (rc) + goto out; + + wil->ring2cid_tid[ring_id][0] = cid; + wil->ring2cid_tid[ring_id][1] = tid; + if (!vif->privacy) + txdata->dot1x_open = true; + + rc = wil_wmi_tx_desc_ring_add(vif, ring_id, cid, tid); + if (rc) { + wil_err(wil, "WMI_TX_DESC_RING_ADD_CMD failed\n"); + goto out_free; + } + + if (txdata->dot1x_open && agg_wsize >= 0) + wil_addba_tx_request(wil, ring_id, agg_wsize); + + return 0; + out_free: + spin_lock_bh(&txdata->lock); + txdata->dot1x_open = false; + txdata->enabled = 0; + spin_unlock_bh(&txdata->lock); + wil_ring_free_edma(wil, ring); + wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID; + wil->ring2cid_tid[ring_id][1] = 0; + + out: + return rc; +} + +/* This function is used only for RX SW reorder */ +static int wil_check_bar(struct wil6210_priv *wil, void *msg, int cid, + struct sk_buff *skb, struct wil_net_stats *stats) +{ + u8 ftype; + u8 fc1; + int mid; + int tid; + u16 seq; + struct wil6210_vif *vif; + + ftype = wil_rx_status_get_frame_type(wil, msg); + if (ftype == IEEE80211_FTYPE_DATA) + return 0; + + fc1 = wil_rx_status_get_fc1(wil, msg); + mid = wil_rx_status_get_mid(msg); + tid = wil_rx_status_get_tid(msg); + seq = le16_to_cpu(wil_rx_status_get_seq(wil, msg)); + vif = wil->vifs[mid]; + + if (unlikely(!vif)) { + wil_dbg_txrx(wil, "RX descriptor with invalid mid %d", mid); + return -EAGAIN; + } + + wil_dbg_txrx(wil, + "Non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", + fc1, mid, cid, tid, seq); + if (stats) + stats->rx_non_data_frame++; + if (wil_is_back_req(fc1)) { + wil_dbg_txrx(wil, + "BAR: MID %d CID %d TID %d Seq 0x%03x\n", + mid, cid, tid, seq); + wil_rx_bar(wil, vif, cid, tid, seq); + } else { + u32 sz = wil->use_compressed_rx_status ? + sizeof(struct wil_rx_status_compressed) : + sizeof(struct wil_rx_status_extended); + + /* print again all info. One can enable only this + * without overhead for printing every Rx frame + */ + wil_dbg_txrx(wil, + "Unhandled non-data frame FC[7:0] 0x%02x MID %d CID %d TID %d Seq 0x%03x\n", + fc1, mid, cid, tid, seq); + wil_hex_dump_txrx("RxS ", DUMP_PREFIX_NONE, 32, 4, + (const void *)msg, sz, false); + wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, + skb->data, skb_headlen(skb), false); + } + + return -EAGAIN; +} + +static int wil_rx_error_check_edma(struct wil6210_priv *wil, + struct sk_buff *skb, + struct wil_net_stats *stats) +{ + int error; + int l2_rx_status; + int l3_rx_status; + int l4_rx_status; + void *msg = wil_skb_rxstatus(skb); + + error = wil_rx_status_get_error(msg); + if (!error) { + skb->ip_summed = CHECKSUM_UNNECESSARY; + return 0; + } + + l2_rx_status = wil_rx_status_get_l2_rx_status(msg); + if (l2_rx_status != 0) { + wil_dbg_txrx(wil, "L2 RX error, l2_rx_status=0x%x\n", + l2_rx_status); + /* Due to HW issue, KEY error will trigger a MIC error */ + if (l2_rx_status & WIL_RX_EDMA_ERROR_MIC) { + wil_dbg_txrx(wil, + "L2 MIC/KEY error, dropping packet\n"); + stats->rx_mic_error++; + } + if (l2_rx_status & WIL_RX_EDMA_ERROR_KEY) { + wil_dbg_txrx(wil, "L2 KEY error, dropping packet\n"); + stats->rx_key_error++; + } + if (l2_rx_status & WIL_RX_EDMA_ERROR_REPLAY) { + wil_dbg_txrx(wil, + "L2 REPLAY error, dropping packet\n"); + stats->rx_replay++; + } + if (l2_rx_status & WIL_RX_EDMA_ERROR_AMSDU) { + wil_dbg_txrx(wil, + "L2 AMSDU error, dropping packet\n"); + stats->rx_amsdu_error++; + } + return -EFAULT; + } + + l3_rx_status = wil_rx_status_get_l3_rx_status(msg); + l4_rx_status = wil_rx_status_get_l4_rx_status(msg); + if (!l3_rx_status && !l4_rx_status) + skb->ip_summed = CHECKSUM_UNNECESSARY; + /* If HW reports bad checksum, let IP stack re-check it + * For example, HW don't understand Microsoft IP stack that + * mis-calculates TCP checksum - if it should be 0x0, + * it writes 0xffff in violation of RFC 1624 + */ + else + stats->rx_csum_err++; + + return 0; +} + +static struct sk_buff *wil_sring_reap_rx_edma(struct wil6210_priv *wil, + struct wil_status_ring *sring) +{ + struct device *dev = wil_to_dev(wil); + struct wil_rx_status_extended msg1; + void *msg = &msg1; + u16 buff_id; + struct sk_buff *skb; + dma_addr_t pa; + struct wil_ring_rx_data *rxdata = &sring->rx_data; + unsigned int sz = ALIGN(wil->rx_buf_len, 4); + struct wil_net_stats *stats = NULL; + u16 dmalen; + int cid; + bool eop, headstolen; + int delta; + u8 dr_bit; + u8 data_offset; + struct wil_rx_status_extended *s; + u16 sring_idx = sring - wil->srings; + + BUILD_BUG_ON(sizeof(struct wil_rx_status_extended) > sizeof(skb->cb)); + +again: + wil_get_next_rx_status_msg(sring, msg); + dr_bit = wil_rx_status_get_desc_rdy_bit(msg); + + /* Completed handling all the ready status messages */ + if (dr_bit != sring->desc_rdy_pol) + return NULL; + + /* Extract the buffer ID from the status message */ + buff_id = le16_to_cpu(wil_rx_status_get_buff_id(msg)); + if (unlikely(!wil_val_in_range(buff_id, 0, wil->rx_buff_mgmt.size))) { + wil_err(wil, "Corrupt buff_id=%d, sring->swhead=%d\n", + buff_id, sring->swhead); + wil_sring_advance_swhead(sring); + goto again; + } + + wil_sring_advance_swhead(sring); + + /* Extract the SKB from the rx_buff management array */ + skb = wil->rx_buff_mgmt.buff_arr[buff_id].skb; + wil->rx_buff_mgmt.buff_arr[buff_id].skb = NULL; + if (!skb) { + wil_err(wil, "No Rx skb at buff_id %d\n", buff_id); + /* Move the buffer from the active list to the free list */ + list_move(&wil->rx_buff_mgmt.buff_arr[buff_id].list, + &wil->rx_buff_mgmt.free); + goto again; + } + + memcpy(&pa, skb->cb, sizeof(pa)); + dma_unmap_single(dev, pa, sz, DMA_FROM_DEVICE); + dmalen = le16_to_cpu(wil_rx_status_get_length(msg)); + + trace_wil6210_rx_status(wil, wil->use_compressed_rx_status, buff_id, + msg); + wil_dbg_txrx(wil, "Rx, buff_id=%u, sring_idx=%u, dmalen=%u bytes\n", + buff_id, sring_idx, dmalen); + wil_hex_dump_txrx("RxS ", DUMP_PREFIX_NONE, 32, 4, + (const void *)msg, wil->use_compressed_rx_status ? + sizeof(struct wil_rx_status_compressed) : + sizeof(struct wil_rx_status_extended), false); + + /* Move the buffer from the active list to the free list */ + list_move(&wil->rx_buff_mgmt.buff_arr[buff_id].list, + &wil->rx_buff_mgmt.free); + + eop = wil_rx_status_get_eop(msg); + + cid = wil_rx_status_get_cid(msg); + if (unlikely(!wil_val_in_range(cid, 0, WIL6210_MAX_CID))) { + wil_err(wil, "Corrupt cid=%d, sring->swhead=%d\n", + cid, sring->swhead); + rxdata->skipping = true; + goto skipping; + } + stats = &wil->sta[cid].stats; + + if (unlikely(skb->len < ETH_HLEN)) { + wil_dbg_txrx(wil, "Short frame, len = %d\n", skb->len); + stats->rx_short_frame++; + rxdata->skipping = true; + goto skipping; + } + + if (unlikely(dmalen > sz)) { + wil_err(wil, "Rx size too large: %d bytes!\n", dmalen); + stats->rx_large_frame++; + rxdata->skipping = true; + } + +skipping: + /* skipping indicates if a certain SKB should be dropped. + * It is set in case there is an error on the current SKB or in case + * of RX chaining: as long as we manage to merge the SKBs it will + * be false. once we have a bad SKB or we don't manage to merge SKBs + * it will be set to the !EOP value of the current SKB. + * This guarantees that all the following SKBs until EOP will also + * get dropped. + */ + if (unlikely(rxdata->skipping)) { + kfree_skb(skb); + if (rxdata->skb) { + kfree_skb(rxdata->skb); + rxdata->skb = NULL; + } + rxdata->skipping = !eop; + goto again; + } + + skb_trim(skb, dmalen); + + prefetch(skb->data); + + if (!rxdata->skb) { + rxdata->skb = skb; + } else { + if (likely(skb_try_coalesce(rxdata->skb, skb, &headstolen, + &delta))) { + kfree_skb_partial(skb, headstolen); + } else { + wil_err(wil, "failed to merge skbs!\n"); + kfree_skb(skb); + kfree_skb(rxdata->skb); + rxdata->skb = NULL; + rxdata->skipping = !eop; + goto again; + } + } + + if (!eop) + goto again; + + /* reaching here rxdata->skb always contains a full packet */ + skb = rxdata->skb; + rxdata->skb = NULL; + rxdata->skipping = false; + + if (stats) { + stats->last_mcs_rx = wil_rx_status_get_mcs(msg); + if (stats->last_mcs_rx < ARRAY_SIZE(stats->rx_per_mcs)) + stats->rx_per_mcs[stats->last_mcs_rx]++; + } + + if (!wil->use_rx_hw_reordering && !wil->use_compressed_rx_status && + wil_check_bar(wil, msg, cid, skb, stats) == -EAGAIN) { + kfree_skb(skb); + goto again; + } + + /* Compensate for the HW data alignment according to the status + * message + */ + data_offset = wil_rx_status_get_data_offset(msg); + if (data_offset == 0xFF || + data_offset > WIL_EDMA_MAX_DATA_OFFSET) { + wil_err(wil, "Unexpected data offset %d\n", data_offset); + kfree_skb(skb); + goto again; + } + + skb_pull(skb, data_offset); + + wil_hex_dump_txrx("Rx ", DUMP_PREFIX_OFFSET, 16, 1, + skb->data, skb_headlen(skb), false); + + /* Has to be done after dma_unmap_single as skb->cb is also + * used for holding the pa + */ + s = wil_skb_rxstatus(skb); + memcpy(s, msg, sring->elem_size); + + return skb; +} + +void wil_rx_handle_edma(struct wil6210_priv *wil, int *quota) +{ + struct net_device *ndev; + struct wil_ring *ring = &wil->ring_rx; + struct wil_status_ring *sring; + struct sk_buff *skb; + int i; + + if (unlikely(!ring->va)) { + wil_err(wil, "Rx IRQ while Rx not yet initialized\n"); + return; + } + wil_dbg_txrx(wil, "rx_handle\n"); + + for (i = 0; i < wil->num_rx_status_rings; i++) { + sring = &wil->srings[i]; + if (unlikely(!sring->va)) { + wil_err(wil, + "Rx IRQ while Rx status ring %d not yet initialized\n", + i); + continue; + } + + while ((*quota > 0) && + (NULL != (skb = + wil_sring_reap_rx_edma(wil, sring)))) { + (*quota)--; + if (wil->use_rx_hw_reordering) { + void *msg = wil_skb_rxstatus(skb); + int mid = wil_rx_status_get_mid(msg); + struct wil6210_vif *vif = wil->vifs[mid]; + + if (unlikely(!vif)) { + wil_dbg_txrx(wil, + "RX desc invalid mid %d", + mid); + kfree_skb(skb); + continue; + } + ndev = vif_to_ndev(vif); + wil_netif_rx_any(skb, ndev); + } else { + wil_rx_reorder(wil, skb); + } + } + + wil_w(wil, sring->hwtail, (sring->swhead - 1) % sring->size); + } + + wil_rx_refill_edma(wil); +} + +static int wil_tx_desc_map_edma(union wil_tx_desc *desc, + dma_addr_t pa, + u32 len, + int ring_index) +{ + struct wil_tx_enhanced_desc *d = + (struct wil_tx_enhanced_desc *)&desc->enhanced; + + memset(d, 0, sizeof(struct wil_tx_enhanced_desc)); + + wil_desc_set_addr_edma(&d->dma.addr, &d->dma.addr_high_high, pa); + + /* 0..6: mac_length; 7:ip_version 0-IP6 1-IP4*/ + d->dma.length = cpu_to_le16((u16)len); + d->mac.d[0] = (ring_index << WIL_EDMA_DESC_TX_MAC_CFG_0_QID_POS); + /* translation type: 0 - bypass; 1 - 802.3; 2 - native wifi; + * 3 - eth mode + */ + d->mac.d[2] = BIT(MAC_CFG_DESC_TX_2_SNAP_HDR_INSERTION_EN_POS) | + (0x3 << MAC_CFG_DESC_TX_2_L2_TRANSLATION_TYPE_POS); + + return 0; +} + +static inline void +wil_get_next_tx_status_msg(struct wil_status_ring *sring, + struct wil_ring_tx_status *msg) +{ + struct wil_ring_tx_status *_msg = (struct wil_ring_tx_status *) + (sring->va + (sring->elem_size * sring->swhead)); + + *msg = *_msg; +} + +/** + * Clean up transmitted skb's from the Tx descriptor RING. + * Return number of descriptors cleared. + */ +int wil_tx_sring_handler(struct wil6210_priv *wil, + struct wil_status_ring *sring) +{ + struct net_device *ndev; + struct device *dev = wil_to_dev(wil); + struct wil_ring *ring = NULL; + struct wil_ring_tx_data *txdata; + /* Total number of completed descriptors in all descriptor rings */ + int desc_cnt = 0; + int cid; + struct wil_net_stats *stats = NULL; + struct wil_tx_enhanced_desc *_d; + unsigned int ring_id; + unsigned int num_descs; + int i; + u8 dr_bit; /* Descriptor Ready bit */ + struct wil_ring_tx_status msg; + struct wil6210_vif *vif; + int used_before_complete; + int used_new; + + wil_get_next_tx_status_msg(sring, &msg); + dr_bit = msg.desc_ready >> TX_STATUS_DESC_READY_POS; + + /* Process completion messages while DR bit has the expected polarity */ + while (dr_bit == sring->desc_rdy_pol) { + num_descs = msg.num_descriptors; + if (!num_descs) { + wil_err(wil, "invalid num_descs 0\n"); + goto again; + } + + /* Find the corresponding descriptor ring */ + ring_id = msg.ring_id; + + if (unlikely(ring_id >= WIL6210_MAX_TX_RINGS)) { + wil_err(wil, "invalid ring id %d\n", ring_id); + goto again; + } + ring = &wil->ring_tx[ring_id]; + if (unlikely(!ring->va)) { + wil_err(wil, "Tx irq[%d]: ring not initialized\n", + ring_id); + goto again; + } + txdata = &wil->ring_tx_data[ring_id]; + if (unlikely(!txdata->enabled)) { + wil_info(wil, "Tx irq[%d]: ring disabled\n", ring_id); + goto again; + } + vif = wil->vifs[txdata->mid]; + if (unlikely(!vif)) { + wil_dbg_txrx(wil, "invalid MID %d for ring %d\n", + txdata->mid, ring_id); + goto again; + } + + ndev = vif_to_ndev(vif); + + cid = wil->ring2cid_tid[ring_id][0]; + if (cid < WIL6210_MAX_CID) + stats = &wil->sta[cid].stats; + + wil_dbg_txrx(wil, + "tx_status: completed desc_ring (%d), num_descs (%d)\n", + ring_id, num_descs); + + used_before_complete = wil_ring_used_tx(ring); + + for (i = 0 ; i < num_descs; ++i) { + struct wil_ctx *ctx = &ring->ctx[ring->swtail]; + struct wil_tx_enhanced_desc dd, *d = ⅆ + u16 dmalen; + struct sk_buff *skb = ctx->skb; + + _d = (struct wil_tx_enhanced_desc *) + &ring->va[ring->swtail].tx.enhanced; + *d = *_d; + + dmalen = le16_to_cpu(d->dma.length); + trace_wil6210_tx_status(&msg, ring->swtail, dmalen); + wil_dbg_txrx(wil, + "TxC[%2d][%3d] : %d bytes, status 0x%02x\n", + ring_id, ring->swtail, dmalen, + msg.status); + wil_hex_dump_txrx("TxS ", DUMP_PREFIX_NONE, 32, 4, + (const void *)&msg, sizeof(msg), + false); + + wil_tx_desc_unmap_edma(dev, + (union wil_tx_desc *)d, + ctx); + + if (skb) { + if (likely(msg.status == 0)) { + ndev->stats.tx_packets++; + ndev->stats.tx_bytes += skb->len; + if (stats) { + stats->tx_packets++; + stats->tx_bytes += skb->len; + + wil_tx_latency_calc(wil, skb, + &wil->sta[cid]); + } + } else { + ndev->stats.tx_errors++; + if (stats) + stats->tx_errors++; + } + wil_consume_skb(skb, msg.status == 0); + } + memset(ctx, 0, sizeof(*ctx)); + /* Make sure the ctx is zeroed before updating the tail + * to prevent a case where wil_tx_ring will see + * this descriptor as used and handle it before ctx zero + * is completed. + */ + wmb(); + + ring->swtail = wil_ring_next_tail(ring); + + desc_cnt++; + } + + /* performance monitoring */ + used_new = wil_ring_used_tx(ring); + if (wil_val_in_range(wil->ring_idle_trsh, + used_new, used_before_complete)) { + wil_dbg_txrx(wil, "Ring[%2d] idle %d -> %d\n", + ring_id, used_before_complete, used_new); + txdata->last_idle = get_cycles(); + } + +again: + wil_sring_advance_swhead(sring); + + wil_get_next_tx_status_msg(sring, &msg); + dr_bit = msg.desc_ready >> TX_STATUS_DESC_READY_POS; + } + + /* shall we wake net queues? */ + if (desc_cnt) + wil_update_net_queues(wil, vif, NULL, false); + + /* Update the HW tail ptr (RD ptr) */ + wil_w(wil, sring->hwtail, (sring->swhead - 1) % sring->size); + + return desc_cnt; +} + +/** + * Sets the descriptor @d up for csum and/or TSO offloading. The corresponding + * @skb is used to obtain the protocol and headers length. + * @tso_desc_type is a descriptor type for TSO: 0 - a header, 1 - first data, + * 2 - middle, 3 - last descriptor. + */ +static void wil_tx_desc_offload_setup_tso_edma(struct wil_tx_enhanced_desc *d, + int tso_desc_type, bool is_ipv4, + int tcp_hdr_len, + int skb_net_hdr_len, + int mss) +{ + /* Number of descriptors */ + d->mac.d[2] |= 1; + /* Maximum Segment Size */ + d->mac.tso_mss |= cpu_to_le16(mss >> 2); + /* L4 header len: TCP header length */ + d->dma.l4_hdr_len |= tcp_hdr_len & DMA_CFG_DESC_TX_0_L4_LENGTH_MSK; + /* EOP, TSO desc type, Segmentation enable, + * Insert IPv4 and TCP / UDP Checksum + */ + d->dma.cmd |= BIT(WIL_EDMA_DESC_TX_CFG_EOP_POS) | + tso_desc_type << WIL_EDMA_DESC_TX_CFG_TSO_DESC_TYPE_POS | + BIT(WIL_EDMA_DESC_TX_CFG_SEG_EN_POS) | + BIT(WIL_EDMA_DESC_TX_CFG_INSERT_IP_CHKSUM_POS) | + BIT(WIL_EDMA_DESC_TX_CFG_INSERT_TCP_CHKSUM_POS); + /* Calculate pseudo-header */ + d->dma.w1 |= BIT(WIL_EDMA_DESC_TX_CFG_PSEUDO_HEADER_CALC_EN_POS) | + BIT(WIL_EDMA_DESC_TX_CFG_L4_TYPE_POS); + /* IP Header Length */ + d->dma.ip_length |= skb_net_hdr_len; + /* MAC header length and IP address family*/ + d->dma.b11 |= ETH_HLEN | + is_ipv4 << DMA_CFG_DESC_TX_OFFLOAD_CFG_L3T_IPV4_POS; +} + +static int wil_tx_tso_gen_desc(struct wil6210_priv *wil, void *buff_addr, + int len, uint i, int tso_desc_type, + skb_frag_t *frag, struct wil_ring *ring, + struct sk_buff *skb, bool is_ipv4, + int tcp_hdr_len, int skb_net_hdr_len, + int mss, int *descs_used) +{ + struct device *dev = wil_to_dev(wil); + struct wil_tx_enhanced_desc *_desc = (struct wil_tx_enhanced_desc *) + &ring->va[i].tx.enhanced; + struct wil_tx_enhanced_desc desc_mem, *d = &desc_mem; + int ring_index = ring - wil->ring_tx; + dma_addr_t pa; + + if (len == 0) + return 0; + + if (!frag) { + pa = dma_map_single(dev, buff_addr, len, DMA_TO_DEVICE); + ring->ctx[i].mapped_as = wil_mapped_as_single; + } else { + pa = skb_frag_dma_map(dev, frag, 0, len, DMA_TO_DEVICE); + ring->ctx[i].mapped_as = wil_mapped_as_page; + } + if (unlikely(dma_mapping_error(dev, pa))) { + wil_err(wil, "TSO: Skb DMA map error\n"); + return -EINVAL; + } + + wil->txrx_ops.tx_desc_map((union wil_tx_desc *)d, pa, + len, ring_index); + wil_tx_desc_offload_setup_tso_edma(d, tso_desc_type, is_ipv4, + tcp_hdr_len, + skb_net_hdr_len, mss); + + /* hold reference to skb + * to prevent skb release before accounting + * in case of immediate "tx done" + */ + if (tso_desc_type == wil_tso_type_lst) + ring->ctx[i].skb = skb_get(skb); + + wil_hex_dump_txrx("TxD ", DUMP_PREFIX_NONE, 32, 4, + (const void *)d, sizeof(*d), false); + + *_desc = *d; + (*descs_used)++; + + return 0; +} + +static int __wil_tx_ring_tso_edma(struct wil6210_priv *wil, + struct wil6210_vif *vif, + struct wil_ring *ring, + struct sk_buff *skb) +{ + int ring_index = ring - wil->ring_tx; + struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_index]; + int nr_frags = skb_shinfo(skb)->nr_frags; + int min_desc_required = nr_frags + 2; /* Headers, Head, Fragments */ + int used, avail = wil_ring_avail_tx(ring); + int f, hdrlen, headlen; + int gso_type; + bool is_ipv4; + u32 swhead = ring->swhead; + int descs_used = 0; /* total number of used descriptors */ + int rc = -EINVAL; + int tcp_hdr_len; + int skb_net_hdr_len; + int mss = skb_shinfo(skb)->gso_size; + + wil_dbg_txrx(wil, "tx_ring_tso: %d bytes to ring %d\n", skb->len, + ring_index); + + if (unlikely(!txdata->enabled)) + return -EINVAL; + + if (unlikely(avail < min_desc_required)) { + wil_err_ratelimited(wil, + "TSO: Tx ring[%2d] full. No space for %d fragments\n", + ring_index, min_desc_required); + return -ENOMEM; + } + + gso_type = skb_shinfo(skb)->gso_type & (SKB_GSO_TCPV6 | SKB_GSO_TCPV4); + switch (gso_type) { + case SKB_GSO_TCPV4: + is_ipv4 = true; + break; + case SKB_GSO_TCPV6: + is_ipv4 = false; + break; + default: + return -EINVAL; + } + + if (skb->ip_summed != CHECKSUM_PARTIAL) + return -EINVAL; + + /* tcp header length and skb network header length are fixed for all + * packet's descriptors - read them once here + */ + tcp_hdr_len = tcp_hdrlen(skb); + skb_net_hdr_len = skb_network_header_len(skb); + + /* First descriptor must contain the header only + * Header Length = MAC header len + IP header len + TCP header len + */ + hdrlen = ETH_HLEN + tcp_hdr_len + skb_net_hdr_len; + wil_dbg_txrx(wil, "TSO: process header descriptor, hdrlen %u\n", + hdrlen); + rc = wil_tx_tso_gen_desc(wil, skb->data, hdrlen, swhead, + wil_tso_type_hdr, NULL, ring, skb, + is_ipv4, tcp_hdr_len, skb_net_hdr_len, + mss, &descs_used); + if (rc) + return -EINVAL; + + /* Second descriptor contains the head */ + headlen = skb_headlen(skb) - hdrlen; + wil_dbg_txrx(wil, "TSO: process skb head, headlen %u\n", headlen); + rc = wil_tx_tso_gen_desc(wil, skb->data + hdrlen, headlen, + (swhead + descs_used) % ring->size, + (nr_frags != 0) ? wil_tso_type_first : + wil_tso_type_lst, NULL, ring, skb, + is_ipv4, tcp_hdr_len, skb_net_hdr_len, + mss, &descs_used); + if (rc) + goto mem_error; + + /* Rest of the descriptors are from the SKB fragments */ + for (f = 0; f < nr_frags; f++) { + skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; + int len = frag->size; + + wil_dbg_txrx(wil, "TSO: frag[%d]: len %u, descs_used %d\n", f, + len, descs_used); + + rc = wil_tx_tso_gen_desc(wil, NULL, len, + (swhead + descs_used) % ring->size, + (f != nr_frags - 1) ? + wil_tso_type_mid : wil_tso_type_lst, + frag, ring, skb, is_ipv4, + tcp_hdr_len, skb_net_hdr_len, + mss, &descs_used); + if (rc) + goto mem_error; + } + + /* performance monitoring */ + used = wil_ring_used_tx(ring); + if (wil_val_in_range(wil->ring_idle_trsh, + used, used + descs_used)) { + txdata->idle += get_cycles() - txdata->last_idle; + wil_dbg_txrx(wil, "Ring[%2d] not idle %d -> %d\n", + ring_index, used, used + descs_used); + } + + /* advance swhead */ + wil_ring_advance_head(ring, descs_used); + wil_dbg_txrx(wil, "TSO: Tx swhead %d -> %d\n", swhead, ring->swhead); + + /* make sure all writes to descriptors (shared memory) are done before + * committing them to HW + */ + wmb(); + + if (wil->tx_latency) + *(ktime_t *)&skb->cb = ktime_get(); + else + memset(skb->cb, 0, sizeof(ktime_t)); + + wil_w(wil, ring->hwtail, ring->swhead); + + return 0; + +mem_error: + while (descs_used > 0) { + struct device *dev = wil_to_dev(wil); + struct wil_ctx *ctx; + int i = (swhead + descs_used - 1) % ring->size; + struct wil_tx_enhanced_desc dd, *d = ⅆ + struct wil_tx_enhanced_desc *_desc = + (struct wil_tx_enhanced_desc *) + &ring->va[i].tx.enhanced; + + *d = *_desc; + ctx = &ring->ctx[i]; + wil_tx_desc_unmap_edma(dev, (union wil_tx_desc *)d, ctx); + memset(ctx, 0, sizeof(*ctx)); + descs_used--; + } + return rc; +} + +static int wil_ring_init_bcast_edma(struct wil6210_vif *vif, int ring_id, + int size) +{ + struct wil6210_priv *wil = vif_to_wil(vif); + struct wil_ring *ring = &wil->ring_tx[ring_id]; + int rc; + struct wil_ring_tx_data *txdata = &wil->ring_tx_data[ring_id]; + + wil_dbg_misc(wil, "init bcast: ring_id=%d, sring_id=%d\n", + ring_id, wil->tx_sring_idx); + + lockdep_assert_held(&wil->mutex); + + wil_tx_data_init(txdata); + ring->size = size; + ring->is_rx = false; + rc = wil_ring_alloc_desc_ring(wil, ring); + if (rc) + goto out; + + wil->ring2cid_tid[ring_id][0] = WIL6210_MAX_CID; /* CID */ + wil->ring2cid_tid[ring_id][1] = 0; /* TID */ + if (!vif->privacy) + txdata->dot1x_open = true; + + rc = wil_wmi_bcast_desc_ring_add(vif, ring_id); + if (rc) + goto out_free; + + return 0; + + out_free: + spin_lock_bh(&txdata->lock); + txdata->enabled = 0; + txdata->dot1x_open = false; + spin_unlock_bh(&txdata->lock); + wil_ring_free_edma(wil, ring); + +out: + return rc; +} + +static void wil_tx_fini_edma(struct wil6210_priv *wil) +{ + struct wil_status_ring *sring = &wil->srings[wil->tx_sring_idx]; + + wil_dbg_misc(wil, "free TX sring\n"); + + wil_sring_free(wil, sring); +} + +static void wil_rx_data_free(struct wil_status_ring *sring) +{ + if (!sring) + return; + + kfree_skb(sring->rx_data.skb); + sring->rx_data.skb = NULL; +} + +static void wil_rx_fini_edma(struct wil6210_priv *wil) +{ + struct wil_ring *ring = &wil->ring_rx; + int i; + + wil_dbg_misc(wil, "rx_fini_edma\n"); + + wil_ring_free_edma(wil, ring); + + for (i = 0; i < wil->num_rx_status_rings; i++) { + wil_rx_data_free(&wil->srings[i]); + wil_sring_free(wil, &wil->srings[i]); + } + + wil_free_rx_buff_arr(wil); +} + +void wil_init_txrx_ops_edma(struct wil6210_priv *wil) +{ + wil->txrx_ops.configure_interrupt_moderation = + wil_configure_interrupt_moderation_edma; + /* TX ops */ + wil->txrx_ops.ring_init_tx = wil_ring_init_tx_edma; + wil->txrx_ops.ring_fini_tx = wil_ring_free_edma; + wil->txrx_ops.ring_init_bcast = wil_ring_init_bcast_edma; + wil->txrx_ops.tx_init = wil_tx_init_edma; + wil->txrx_ops.tx_fini = wil_tx_fini_edma; + wil->txrx_ops.tx_desc_map = wil_tx_desc_map_edma; + wil->txrx_ops.tx_desc_unmap = wil_tx_desc_unmap_edma; + wil->txrx_ops.tx_ring_tso = __wil_tx_ring_tso_edma; + /* RX ops */ + wil->txrx_ops.rx_init = wil_rx_init_edma; + wil->txrx_ops.wmi_addba_rx_resp = wmi_addba_rx_resp_edma; + wil->txrx_ops.get_reorder_params = wil_get_reorder_params_edma; + wil->txrx_ops.get_netif_rx_params = wil_get_netif_rx_params_edma; + wil->txrx_ops.rx_crypto_check = wil_rx_crypto_check_edma; + wil->txrx_ops.rx_error_check = wil_rx_error_check_edma; + wil->txrx_ops.is_rx_idle = wil_is_rx_idle_edma; + wil->txrx_ops.rx_fini = wil_rx_fini_edma; +} + |