diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath11k/ce.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath11k/ce.c | 805 |
1 files changed, 805 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath11k/ce.c b/drivers/net/wireless/ath/ath11k/ce.c new file mode 100644 index 000000000000..a6572b414303 --- /dev/null +++ b/drivers/net/wireless/ath/ath11k/ce.c @@ -0,0 +1,805 @@ +// SPDX-License-Identifier: BSD-3-Clause-Clear +/* + * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. + */ + +#include "dp_rx.h" +#include "debug.h" + +static const struct ce_attr host_ce_config_wlan[] = { + /* CE0: host->target HTC control and raw streams */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 16, + .src_sz_max = 2048, + .dest_nentries = 0, + }, + + /* CE1: target->host HTT + HTC control */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 0, + .src_sz_max = 2048, + .dest_nentries = 512, + .recv_cb = ath11k_htc_rx_completion_handler, + }, + + /* CE2: target->host WMI */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 0, + .src_sz_max = 2048, + .dest_nentries = 512, + .recv_cb = ath11k_htc_rx_completion_handler, + }, + + /* CE3: host->target WMI (mac0) */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 32, + .src_sz_max = 2048, + .dest_nentries = 0, + }, + + /* CE4: host->target HTT */ + { + .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR, + .src_nentries = 2048, + .src_sz_max = 256, + .dest_nentries = 0, + }, + + /* CE5: target->host pktlog */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 0, + .src_sz_max = 2048, + .dest_nentries = 512, + .recv_cb = ath11k_dp_htt_htc_t2h_msg_handler, + }, + + /* CE6: target autonomous hif_memcpy */ + { + .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR, + .src_nentries = 0, + .src_sz_max = 0, + .dest_nentries = 0, + }, + + /* CE7: host->target WMI (mac1) */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 32, + .src_sz_max = 2048, + .dest_nentries = 0, + }, + + /* CE8: target autonomous hif_memcpy */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 0, + .src_sz_max = 0, + .dest_nentries = 0, + }, + + /* CE9: host->target WMI (mac2) */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 32, + .src_sz_max = 2048, + .dest_nentries = 0, + }, + + /* CE10: target->host HTT */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 0, + .src_sz_max = 2048, + .dest_nentries = 512, + .recv_cb = ath11k_htc_rx_completion_handler, + }, + + /* CE11: Not used */ + { + .flags = CE_ATTR_FLAGS, + .src_nentries = 0, + .src_sz_max = 0, + .dest_nentries = 0, + }, +}; + +static int ath11k_ce_rx_buf_enqueue_pipe(struct ath11k_ce_pipe *pipe, + struct sk_buff *skb, dma_addr_t paddr) +{ + struct ath11k_base *ab = pipe->ab; + struct ath11k_ce_ring *ring = pipe->dest_ring; + struct hal_srng *srng; + unsigned int write_index; + unsigned int nentries_mask = ring->nentries_mask; + u32 *desc; + int ret; + + lockdep_assert_held(&ab->ce.ce_lock); + + write_index = ring->write_index; + + srng = &ab->hal.srng_list[ring->hal_ring_id]; + + spin_lock_bh(&srng->lock); + + ath11k_hal_srng_access_begin(ab, srng); + + if (unlikely(ath11k_hal_srng_src_num_free(ab, srng, false) < 1)) { + ret = -ENOSPC; + goto exit; + } + + desc = ath11k_hal_srng_src_get_next_entry(ab, srng); + if (!desc) { + ret = -ENOSPC; + goto exit; + } + + ath11k_hal_ce_dst_set_desc(desc, paddr); + + ring->skb[write_index] = skb; + write_index = CE_RING_IDX_INCR(nentries_mask, write_index); + ring->write_index = write_index; + + pipe->rx_buf_needed--; + + ret = 0; +exit: + ath11k_hal_srng_access_end(ab, srng); + + spin_unlock_bh(&srng->lock); + + return ret; +} + +static int ath11k_ce_rx_post_pipe(struct ath11k_ce_pipe *pipe) +{ + struct ath11k_base *ab = pipe->ab; + struct sk_buff *skb; + dma_addr_t paddr; + int ret = 0; + + if (!(pipe->dest_ring || pipe->status_ring)) + return 0; + + spin_lock_bh(&ab->ce.ce_lock); + while (pipe->rx_buf_needed) { + skb = dev_alloc_skb(pipe->buf_sz); + if (!skb) { + ret = -ENOMEM; + goto exit; + } + + WARN_ON_ONCE(!IS_ALIGNED((unsigned long)skb->data, 4)); + + paddr = dma_map_single(ab->dev, skb->data, + skb->len + skb_tailroom(skb), + DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(ab->dev, paddr))) { + ath11k_warn(ab, "failed to dma map ce rx buf\n"); + dev_kfree_skb_any(skb); + ret = -EIO; + goto exit; + } + + ATH11K_SKB_RXCB(skb)->paddr = paddr; + + ret = ath11k_ce_rx_buf_enqueue_pipe(pipe, skb, paddr); + + if (ret) { + ath11k_warn(ab, "failed to enqueue rx buf: %d\n", ret); + dma_unmap_single(ab->dev, paddr, + skb->len + skb_tailroom(skb), + DMA_FROM_DEVICE); + dev_kfree_skb_any(skb); + goto exit; + } + } + +exit: + spin_unlock_bh(&ab->ce.ce_lock); + return ret; +} + +static int ath11k_ce_completed_recv_next(struct ath11k_ce_pipe *pipe, + struct sk_buff **skb, int *nbytes) +{ + struct ath11k_base *ab = pipe->ab; + struct hal_srng *srng; + unsigned int sw_index; + unsigned int nentries_mask; + u32 *desc; + int ret = 0; + + spin_lock_bh(&ab->ce.ce_lock); + + sw_index = pipe->dest_ring->sw_index; + nentries_mask = pipe->dest_ring->nentries_mask; + + srng = &ab->hal.srng_list[pipe->status_ring->hal_ring_id]; + + spin_lock_bh(&srng->lock); + + ath11k_hal_srng_access_begin(ab, srng); + + desc = ath11k_hal_srng_dst_get_next_entry(ab, srng); + if (!desc) { + ret = -EIO; + goto err; + } + + *nbytes = ath11k_hal_ce_dst_status_get_length(desc); + if (*nbytes == 0) { + ret = -EIO; + goto err; + } + + *skb = pipe->dest_ring->skb[sw_index]; + pipe->dest_ring->skb[sw_index] = NULL; + + sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index); + pipe->dest_ring->sw_index = sw_index; + + pipe->rx_buf_needed++; +err: + ath11k_hal_srng_access_end(ab, srng); + + spin_unlock_bh(&srng->lock); + + spin_unlock_bh(&ab->ce.ce_lock); + + return ret; +} + +static void ath11k_ce_recv_process_cb(struct ath11k_ce_pipe *pipe) +{ + struct ath11k_base *ab = pipe->ab; + struct sk_buff *skb; + struct sk_buff_head list; + unsigned int nbytes, max_nbytes; + int ret; + + __skb_queue_head_init(&list); + while (ath11k_ce_completed_recv_next(pipe, &skb, &nbytes) == 0) { + max_nbytes = skb->len + skb_tailroom(skb); + dma_unmap_single(ab->dev, ATH11K_SKB_RXCB(skb)->paddr, + max_nbytes, DMA_FROM_DEVICE); + + if (unlikely(max_nbytes < nbytes)) { + ath11k_warn(ab, "rxed more than expected (nbytes %d, max %d)", + nbytes, max_nbytes); + dev_kfree_skb_any(skb); + continue; + } + + skb_put(skb, nbytes); + __skb_queue_tail(&list, skb); + } + + while ((skb = __skb_dequeue(&list))) { + ath11k_dbg(ab, ATH11K_DBG_AHB, "rx ce pipe %d len %d\n", + pipe->pipe_num, skb->len); + pipe->recv_cb(ab, skb); + } + + ret = ath11k_ce_rx_post_pipe(pipe); + if (ret && ret != -ENOSPC) { + ath11k_warn(ab, "failed to post rx buf to pipe: %d err: %d\n", + pipe->pipe_num, ret); + mod_timer(&ab->rx_replenish_retry, + jiffies + ATH11K_CE_RX_POST_RETRY_JIFFIES); + } +} + +static struct sk_buff *ath11k_ce_completed_send_next(struct ath11k_ce_pipe *pipe) +{ + struct ath11k_base *ab = pipe->ab; + struct hal_srng *srng; + unsigned int sw_index; + unsigned int nentries_mask; + struct sk_buff *skb; + u32 *desc; + + spin_lock_bh(&ab->ce.ce_lock); + + sw_index = pipe->src_ring->sw_index; + nentries_mask = pipe->src_ring->nentries_mask; + + srng = &ab->hal.srng_list[pipe->src_ring->hal_ring_id]; + + spin_lock_bh(&srng->lock); + + ath11k_hal_srng_access_begin(ab, srng); + + desc = ath11k_hal_srng_src_reap_next(ab, srng); + if (!desc) { + skb = ERR_PTR(-EIO); + goto err_unlock; + } + + skb = pipe->src_ring->skb[sw_index]; + + pipe->src_ring->skb[sw_index] = NULL; + + sw_index = CE_RING_IDX_INCR(nentries_mask, sw_index); + pipe->src_ring->sw_index = sw_index; + +err_unlock: + spin_unlock_bh(&srng->lock); + + spin_unlock_bh(&ab->ce.ce_lock); + + return skb; +} + +static void ath11k_ce_send_done_cb(struct ath11k_ce_pipe *pipe) +{ + struct ath11k_base *ab = pipe->ab; + struct sk_buff *skb; + + while (!IS_ERR(skb = ath11k_ce_completed_send_next(pipe))) { + if (!skb) + continue; + + dma_unmap_single(ab->dev, ATH11K_SKB_CB(skb)->paddr, skb->len, + DMA_TO_DEVICE); + dev_kfree_skb_any(skb); + } +} + +static int ath11k_ce_init_ring(struct ath11k_base *ab, + struct ath11k_ce_ring *ce_ring, + int ce_id, enum hal_ring_type type) +{ + struct hal_srng_params params = { 0 }; + int ret; + + params.ring_base_paddr = ce_ring->base_addr_ce_space; + params.ring_base_vaddr = ce_ring->base_addr_owner_space; + params.num_entries = ce_ring->nentries; + + switch (type) { + case HAL_CE_SRC: + if (!(CE_ATTR_DIS_INTR & host_ce_config_wlan[ce_id].flags)) + params.intr_batch_cntr_thres_entries = 1; + break; + case HAL_CE_DST: + params.max_buffer_len = host_ce_config_wlan[ce_id].src_sz_max; + if (!(host_ce_config_wlan[ce_id].flags & CE_ATTR_DIS_INTR)) { + params.intr_timer_thres_us = 1024; + params.flags |= HAL_SRNG_FLAGS_LOW_THRESH_INTR_EN; + params.low_threshold = ce_ring->nentries - 3; + } + break; + case HAL_CE_DST_STATUS: + if (!(host_ce_config_wlan[ce_id].flags & CE_ATTR_DIS_INTR)) { + params.intr_batch_cntr_thres_entries = 1; + params.intr_timer_thres_us = 0x1000; + } + break; + default: + ath11k_warn(ab, "Invalid CE ring type %d\n", type); + return -EINVAL; + } + + /* TODO: Init other params needed by HAL to init the ring */ + + ret = ath11k_hal_srng_setup(ab, type, ce_id, 0, ¶ms); + if (ret < 0) { + ath11k_warn(ab, "failed to setup srng: %d ring_id %d\n", + ret, ce_id); + return ret; + } + ce_ring->hal_ring_id = ret; + + return 0; +} + +static struct ath11k_ce_ring * +ath11k_ce_alloc_ring(struct ath11k_base *ab, int nentries, int desc_sz) +{ + struct ath11k_ce_ring *ce_ring; + dma_addr_t base_addr; + + ce_ring = kzalloc(struct_size(ce_ring, skb, nentries), GFP_KERNEL); + if (ce_ring == NULL) + return ERR_PTR(-ENOMEM); + + ce_ring->nentries = nentries; + ce_ring->nentries_mask = nentries - 1; + + /* Legacy platforms that do not support cache + * coherent DMA are unsupported + */ + ce_ring->base_addr_owner_space_unaligned = + dma_alloc_coherent(ab->dev, + nentries * desc_sz + CE_DESC_RING_ALIGN, + &base_addr, GFP_KERNEL); + if (!ce_ring->base_addr_owner_space_unaligned) { + kfree(ce_ring); + return ERR_PTR(-ENOMEM); + } + + ce_ring->base_addr_ce_space_unaligned = base_addr; + + ce_ring->base_addr_owner_space = PTR_ALIGN( + ce_ring->base_addr_owner_space_unaligned, + CE_DESC_RING_ALIGN); + ce_ring->base_addr_ce_space = ALIGN( + ce_ring->base_addr_ce_space_unaligned, + CE_DESC_RING_ALIGN); + + return ce_ring; +} + +static int ath11k_ce_alloc_pipe(struct ath11k_base *ab, int ce_id) +{ + struct ath11k_ce_pipe *pipe = &ab->ce.ce_pipe[ce_id]; + const struct ce_attr *attr = &host_ce_config_wlan[ce_id]; + int nentries; + int desc_sz; + + pipe->attr_flags = attr->flags; + + if (attr->src_nentries) { + pipe->send_cb = ath11k_ce_send_done_cb; + nentries = roundup_pow_of_two(attr->src_nentries); + desc_sz = ath11k_hal_ce_get_desc_size(HAL_CE_DESC_SRC); + pipe->src_ring = ath11k_ce_alloc_ring(ab, nentries, desc_sz); + if (!pipe->src_ring) + return -ENOMEM; + } + + if (attr->dest_nentries) { + pipe->recv_cb = attr->recv_cb; + nentries = roundup_pow_of_two(attr->dest_nentries); + desc_sz = ath11k_hal_ce_get_desc_size(HAL_CE_DESC_DST); + pipe->dest_ring = ath11k_ce_alloc_ring(ab, nentries, desc_sz); + + if (!pipe->dest_ring) + return -ENOMEM; + + desc_sz = ath11k_hal_ce_get_desc_size(HAL_CE_DESC_DST_STATUS); + pipe->status_ring = ath11k_ce_alloc_ring(ab, nentries, desc_sz); + if (!pipe->status_ring) + return -ENOMEM; + } + + return 0; +} + +void ath11k_ce_per_engine_service(struct ath11k_base *ab, u16 ce_id) +{ + struct ath11k_ce_pipe *pipe = &ab->ce.ce_pipe[ce_id]; + + if (pipe->send_cb) + pipe->send_cb(pipe); + + if (pipe->recv_cb) + ath11k_ce_recv_process_cb(pipe); +} + +void ath11k_ce_poll_send_completed(struct ath11k_base *ab, u8 pipe_id) +{ + struct ath11k_ce_pipe *pipe = &ab->ce.ce_pipe[pipe_id]; + + if ((pipe->attr_flags & CE_ATTR_DIS_INTR) && pipe->send_cb) + pipe->send_cb(pipe); +} + +int ath11k_ce_send(struct ath11k_base *ab, struct sk_buff *skb, u8 pipe_id, + u16 transfer_id) +{ + struct ath11k_ce_pipe *pipe = &ab->ce.ce_pipe[pipe_id]; + struct hal_srng *srng; + u32 *desc; + unsigned int write_index, sw_index; + unsigned int nentries_mask; + int ret = 0; + u8 byte_swap_data = 0; + int num_used; + + /* Check if some entries could be regained by handling tx completion if + * the CE has interrupts disabled and the used entries is more than the + * defined usage threshold. + */ + if (pipe->attr_flags & CE_ATTR_DIS_INTR) { + spin_lock_bh(&ab->ce.ce_lock); + write_index = pipe->src_ring->write_index; + + sw_index = pipe->src_ring->sw_index; + + if (write_index >= sw_index) + num_used = write_index - sw_index; + else + num_used = pipe->src_ring->nentries - sw_index + + write_index; + + spin_unlock_bh(&ab->ce.ce_lock); + + if (num_used > ATH11K_CE_USAGE_THRESHOLD) + ath11k_ce_poll_send_completed(ab, pipe->pipe_num); + } + + if (test_bit(ATH11K_FLAG_CRASH_FLUSH, &ab->dev_flags)) + return -ESHUTDOWN; + + spin_lock_bh(&ab->ce.ce_lock); + + write_index = pipe->src_ring->write_index; + nentries_mask = pipe->src_ring->nentries_mask; + + srng = &ab->hal.srng_list[pipe->src_ring->hal_ring_id]; + + spin_lock_bh(&srng->lock); + + ath11k_hal_srng_access_begin(ab, srng); + + if (unlikely(ath11k_hal_srng_src_num_free(ab, srng, false) < 1)) { + ath11k_hal_srng_access_end(ab, srng); + ret = -ENOBUFS; + goto err_unlock; + } + + desc = ath11k_hal_srng_src_get_next_reaped(ab, srng); + if (!desc) { + ath11k_hal_srng_access_end(ab, srng); + ret = -ENOBUFS; + goto err_unlock; + } + + if (pipe->attr_flags & CE_ATTR_BYTE_SWAP_DATA) + byte_swap_data = 1; + + ath11k_hal_ce_src_set_desc(desc, ATH11K_SKB_CB(skb)->paddr, + skb->len, transfer_id, byte_swap_data); + + pipe->src_ring->skb[write_index] = skb; + pipe->src_ring->write_index = CE_RING_IDX_INCR(nentries_mask, + write_index); + + ath11k_hal_srng_access_end(ab, srng); + + spin_unlock_bh(&srng->lock); + + spin_unlock_bh(&ab->ce.ce_lock); + + return 0; + +err_unlock: + spin_unlock_bh(&srng->lock); + + spin_unlock_bh(&ab->ce.ce_lock); + + return ret; +} + +static void ath11k_ce_rx_pipe_cleanup(struct ath11k_ce_pipe *pipe) +{ + struct ath11k_base *ab = pipe->ab; + struct ath11k_ce_ring *ring = pipe->dest_ring; + struct sk_buff *skb; + int i; + + if (!(ring && pipe->buf_sz)) + return; + + for (i = 0; i < ring->nentries; i++) { + skb = ring->skb[i]; + if (!skb) + continue; + + ring->skb[i] = NULL; + dma_unmap_single(ab->dev, ATH11K_SKB_RXCB(skb)->paddr, + skb->len + skb_tailroom(skb), DMA_FROM_DEVICE); + dev_kfree_skb_any(skb); + } +} + +void ath11k_ce_cleanup_pipes(struct ath11k_base *ab) +{ + struct ath11k_ce_pipe *pipe; + int pipe_num; + + for (pipe_num = 0; pipe_num < CE_COUNT; pipe_num++) { + pipe = &ab->ce.ce_pipe[pipe_num]; + ath11k_ce_rx_pipe_cleanup(pipe); + + /* Cleanup any src CE's which have interrupts disabled */ + ath11k_ce_poll_send_completed(ab, pipe_num); + + /* NOTE: Should we also clean up tx buffer in all pipes? */ + } +} + +void ath11k_ce_rx_post_buf(struct ath11k_base *ab) +{ + struct ath11k_ce_pipe *pipe; + int i; + int ret; + + for (i = 0; i < CE_COUNT; i++) { + pipe = &ab->ce.ce_pipe[i]; + ret = ath11k_ce_rx_post_pipe(pipe); + if (ret) { + if (ret == -ENOSPC) + continue; + + ath11k_warn(ab, "failed to post rx buf to pipe: %d err: %d\n", + i, ret); + mod_timer(&ab->rx_replenish_retry, + jiffies + ATH11K_CE_RX_POST_RETRY_JIFFIES); + + return; + } + } +} + +void ath11k_ce_rx_replenish_retry(struct timer_list *t) +{ + struct ath11k_base *ab = from_timer(ab, t, rx_replenish_retry); + + ath11k_ce_rx_post_buf(ab); +} + +int ath11k_ce_init_pipes(struct ath11k_base *ab) +{ + struct ath11k_ce_pipe *pipe; + int i; + int ret; + + for (i = 0; i < CE_COUNT; i++) { + pipe = &ab->ce.ce_pipe[i]; + + if (pipe->src_ring) { + ret = ath11k_ce_init_ring(ab, pipe->src_ring, i, + HAL_CE_SRC); + if (ret) { + ath11k_warn(ab, "failed to init src ring: %d\n", + ret); + /* Should we clear any partial init */ + return ret; + } + + pipe->src_ring->write_index = 0; + pipe->src_ring->sw_index = 0; + } + + if (pipe->dest_ring) { + ret = ath11k_ce_init_ring(ab, pipe->dest_ring, i, + HAL_CE_DST); + if (ret) { + ath11k_warn(ab, "failed to init dest ring: %d\n", + ret); + /* Should we clear any partial init */ + return ret; + } + + pipe->rx_buf_needed = pipe->dest_ring->nentries ? + pipe->dest_ring->nentries - 2 : 0; + + pipe->dest_ring->write_index = 0; + pipe->dest_ring->sw_index = 0; + } + + if (pipe->status_ring) { + ret = ath11k_ce_init_ring(ab, pipe->status_ring, i, + HAL_CE_DST_STATUS); + if (ret) { + ath11k_warn(ab, "failed to init dest status ing: %d\n", + ret); + /* Should we clear any partial init */ + return ret; + } + + pipe->status_ring->write_index = 0; + pipe->status_ring->sw_index = 0; + } + } + + return 0; +} + +void ath11k_ce_free_pipes(struct ath11k_base *ab) +{ + struct ath11k_ce_pipe *pipe; + int desc_sz; + int i; + + for (i = 0; i < CE_COUNT; i++) { + pipe = &ab->ce.ce_pipe[i]; + + if (pipe->src_ring) { + desc_sz = ath11k_hal_ce_get_desc_size(HAL_CE_DESC_SRC); + dma_free_coherent(ab->dev, + pipe->src_ring->nentries * desc_sz + + CE_DESC_RING_ALIGN, + pipe->src_ring->base_addr_owner_space, + pipe->src_ring->base_addr_ce_space); + kfree(pipe->src_ring); + pipe->src_ring = NULL; + } + + if (pipe->dest_ring) { + desc_sz = ath11k_hal_ce_get_desc_size(HAL_CE_DESC_DST); + dma_free_coherent(ab->dev, + pipe->dest_ring->nentries * desc_sz + + CE_DESC_RING_ALIGN, + pipe->dest_ring->base_addr_owner_space, + pipe->dest_ring->base_addr_ce_space); + kfree(pipe->dest_ring); + pipe->dest_ring = NULL; + } + + if (pipe->status_ring) { + desc_sz = + ath11k_hal_ce_get_desc_size(HAL_CE_DESC_DST_STATUS); + dma_free_coherent(ab->dev, + pipe->status_ring->nentries * desc_sz + + CE_DESC_RING_ALIGN, + pipe->status_ring->base_addr_owner_space, + pipe->status_ring->base_addr_ce_space); + kfree(pipe->status_ring); + pipe->status_ring = NULL; + } + } +} + +int ath11k_ce_alloc_pipes(struct ath11k_base *ab) +{ + struct ath11k_ce_pipe *pipe; + int i; + int ret; + const struct ce_attr *attr; + + spin_lock_init(&ab->ce.ce_lock); + + for (i = 0; i < CE_COUNT; i++) { + attr = &host_ce_config_wlan[i]; + pipe = &ab->ce.ce_pipe[i]; + pipe->pipe_num = i; + pipe->ab = ab; + pipe->buf_sz = attr->src_sz_max; + + ret = ath11k_ce_alloc_pipe(ab, i); + if (ret) { + /* Free any parial successful allocation */ + ath11k_ce_free_pipes(ab); + return ret; + } + } + + return 0; +} + +/* For Big Endian Host, Copy Engine byte_swap is enabled + * When Copy Engine does byte_swap, need to byte swap again for the + * Host to get/put buffer content in the correct byte order + */ +void ath11k_ce_byte_swap(void *mem, u32 len) +{ + int i; + + if (IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)) { + if (!mem) + return; + + for (i = 0; i < (len / 4); i++) { + *(u32 *)mem = swab32(*(u32 *)mem); + mem += 4; + } + } +} + +int ath11k_ce_get_attr_flags(int ce_id) +{ + if (ce_id >= CE_COUNT) + return -EINVAL; + + return host_ce_config_wlan[ce_id].flags; +} |