[PATCH 03/50] wifi: ath12k: add ce.c

Kalle Valo
2022-08-12T16:09:16Z

From: Kalle Valo <quic_kvalo@quicinc.com>

(Patches split into one patch per file for easier review, but the final
commit will be one big patch. See the cover letter for more info.)

Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
---
drivers/net/wireless/ath/ath12k/ce.c | 971 +++++++++++++++++++++++++++++++++++
1 file changed, 971 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/ce.c b/drivers/net/wireless/ath/ath12k/ce.c
new file mode 100644
index 000000000000..5694eef37232
--- /dev/null
+++ b/drivers/net/wireless/ath/ath12k/ce.c
@@ -0,0 +1,971 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/*
+ * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include "dp_rx.h"
+#include "debug.h"
+#include "hif.h"
+
+const struct ce_attr ath12k_host_ce_config_qcn9274[] = {
+ /* 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 = ath12k_htc_rx_completion_handler,
+ },
+
+ /* CE2: target->host WMI */
+ {
+ .flags = CE_ATTR_FLAGS,
+ .src_nentries = 0,
+ .src_sz_max = 2048,
+ .dest_nentries = 128,
+ .recv_cb = ath12k_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 = ath12k_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 | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+ /* CE9: MHI */
+ {
+ .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+ /* CE10: MHI */
+ {
+ .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+ /* CE11: MHI */
+ {
+ .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+ /* CE12: CV Prefetch */
+ {
+ .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+ /* CE13: CV Prefetch */
+ {
+ .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+ /* CE14: target->host dbg log */
+ {
+ .flags = CE_ATTR_FLAGS,
+ .src_nentries = 0,
+ .src_sz_max = 2048,
+ .dest_nentries = 512,
+ .recv_cb = ath12k_htc_rx_completion_handler,
+ },
+
+ /* CE15: reserved for future use */
+ {
+ .flags = (CE_ATTR_FLAGS | CE_ATTR_DIS_INTR),
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+};
+
+const struct ce_attr ath12k_host_ce_config_wcn7850[] = {
+ /* 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 = ath12k_htc_rx_completion_handler,
+ },
+
+ /* CE2: target->host WMI */
+ {
+ .flags = CE_ATTR_FLAGS,
+ .src_nentries = 0,
+ .src_sz_max = 2048,
+ .dest_nentries = 64,
+ .recv_cb = ath12k_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 = 0,
+ .dest_nentries = 0,
+ },
+
+ /* 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 | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 2048,
+ .dest_nentries = 0,
+ },
+
+ /* CE8: target autonomous hif_memcpy */
+ {
+ .flags = CE_ATTR_FLAGS | CE_ATTR_DIS_INTR,
+ .src_nentries = 0,
+ .src_sz_max = 0,
+ .dest_nentries = 0,
+ },
+
+};
+
+static int ath12k_ce_rx_buf_enqueue_pipe(struct ath12k_ce_pipe *pipe,
+ struct sk_buff *skb, dma_addr_t paddr)
+{
+ struct ath12k_base *ab = pipe->ab;
+ struct ath12k_ce_ring *ring = pipe->dest_ring;
+ struct hal_srng *srng;
+ unsigned int write_index;
+ unsigned int nentries_mask = ring->nentries_mask;
+ struct hal_ce_srng_dest_desc *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);
+
+ ath12k_hal_srng_access_begin(ab, srng);
+
+ if (unlikely(ath12k_hal_srng_src_num_free(ab, srng, false) < 1)) {
+ ret = -ENOSPC;
+ goto exit;
+ }
+
+ desc = ath12k_hal_srng_src_get_next_entry(ab, srng);
+ if (!desc) {
+ ret = -ENOSPC;
+ goto exit;
+ }
+
+ ath12k_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:
+ ath12k_hal_srng_access_end(ab, srng);
+
+ spin_unlock_bh(&srng->lock);
+
+ return ret;
+}
+
+static int ath12k_ce_rx_post_pipe(struct ath12k_ce_pipe *pipe)
+{
+ struct ath12k_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))) {
+ ath12k_warn(ab, "failed to dma map ce rx buf\n");
+ dev_kfree_skb_any(skb);
+ ret = -EIO;
+ goto exit;
+ }
+
+ ATH12K_SKB_RXCB(skb)->paddr = paddr;
+
+ ret = ath12k_ce_rx_buf_enqueue_pipe(pipe, skb, paddr);
+
+ if (ret) {
+ ath12k_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 ath12k_ce_completed_recv_next(struct ath12k_ce_pipe *pipe,
+ struct sk_buff **skb, int *nbytes)
+{
+ struct ath12k_base *ab = pipe->ab;
+ struct hal_ce_srng_dst_status_desc *desc;
+ struct hal_srng *srng;
+ unsigned int sw_index;
+ unsigned int nentries_mask;
+ 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);
+
+ ath12k_hal_srng_access_begin(ab, srng);
+
+ desc = ath12k_hal_srng_dst_get_next_entry(ab, srng);
+ if (!desc) {
+ ret = -EIO;
+ goto err;
+ }
+
+ *nbytes = ath12k_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:
+ ath12k_hal_srng_access_end(ab, srng);
+
+ spin_unlock_bh(&srng->lock);
+
+ spin_unlock_bh(&ab->ce.ce_lock);
+
+ return ret;
+}
+
+static void ath12k_ce_recv_process_cb(struct ath12k_ce_pipe *pipe)
+{
+ struct ath12k_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 (ath12k_ce_completed_recv_next(pipe, &skb, &nbytes) == 0) {
+ max_nbytes = skb->len + skb_tailroom(skb);
+ dma_unmap_single(ab->dev, ATH12K_SKB_RXCB(skb)->paddr,
+ max_nbytes, DMA_FROM_DEVICE);
+
+ if (unlikely(max_nbytes < nbytes)) {
+ ath12k_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))) {
+ ath12k_dbg(ab, ATH12K_DBG_AHB, "rx ce pipe %d len %d\n",
+ pipe->pipe_num, skb->len);
+ pipe->recv_cb(ab, skb);
+ }
+
+ ret = ath12k_ce_rx_post_pipe(pipe);
+ if (ret && ret != -ENOSPC) {
+ ath12k_warn(ab, "failed to post rx buf to pipe: %d err: %d\n",
+ pipe->pipe_num, ret);
+ mod_timer(&ab->rx_replenish_retry,
+ jiffies + ATH12K_CE_RX_POST_RETRY_JIFFIES);
+ }
+}
+
+static struct sk_buff *ath12k_ce_completed_send_next(struct ath12k_ce_pipe *pipe)
+{
+ struct ath12k_base *ab = pipe->ab;
+ struct hal_ce_srng_src_desc *desc;
+ struct hal_srng *srng;
+ unsigned int sw_index;
+ unsigned int nentries_mask;
+ struct sk_buff *skb;
+
+ 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);
+
+ ath12k_hal_srng_access_begin(ab, srng);
+
+ desc = ath12k_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 ath12k_ce_send_done_cb(struct ath12k_ce_pipe *pipe)
+{
+ struct ath12k_base *ab = pipe->ab;
+ struct sk_buff *skb;
+
+ while (!IS_ERR(skb = ath12k_ce_completed_send_next(pipe))) {
+ if (!skb)
+ continue;
+
+ dma_unmap_single(ab->dev, ATH12K_SKB_CB(skb)->paddr, skb->len,
+ DMA_TO_DEVICE);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+static void ath12k_ce_srng_msi_ring_params_setup(struct ath12k_base *ab, u32 ce_id,
+ struct hal_srng_params *ring_params)
+{
+ u32 msi_data_start;
+ u32 msi_data_count, msi_data_idx;
+ u32 msi_irq_start;
+ u32 addr_lo;
+ u32 addr_hi;
+ int ret;
+
+ ret = ath12k_hif_get_user_msi_vector(ab, "CE",
+ &msi_data_count, &msi_data_start,
+ &msi_irq_start);
+
+ if (ret)
+ return;
+
+ ath12k_hif_get_msi_address(ab, &addr_lo, &addr_hi);
+ ath12k_hif_get_ce_msi_idx(ab, ce_id, &msi_data_idx);
+
+ ring_params->msi_addr = addr_lo;
+ ring_params->msi_addr |= (dma_addr_t)(((uint64_t)addr_hi) << 32);
+ ring_params->msi_data = (msi_data_idx % msi_data_count) + msi_data_start;
+ ring_params->flags |= HAL_SRNG_FLAGS_MSI_INTR;
+}
+
+static int ath12k_ce_init_ring(struct ath12k_base *ab,
+ struct ath12k_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;
+
+ if (!(CE_ATTR_DIS_INTR & ab->hw_params->host_ce_config[ce_id].flags))
+ ath12k_ce_srng_msi_ring_params_setup(ab, ce_id, &params);
+
+ switch (type) {
+ case HAL_CE_SRC:
+ if (!(CE_ATTR_DIS_INTR & ab->hw_params->host_ce_config[ce_id].flags))
+ params.intr_batch_cntr_thres_entries = 1;
+ break;
+ case HAL_CE_DST:
+ params.max_buffer_len = ab->hw_params->host_ce_config[ce_id].src_sz_max;
+ if (!(ab->hw_params->host_ce_config[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 (!(ab->hw_params->host_ce_config[ce_id].flags & CE_ATTR_DIS_INTR)) {
+ params.intr_batch_cntr_thres_entries = 1;
+ params.intr_timer_thres_us = 0x1000;
+ }
+ break;
+ default:
+ ath12k_warn(ab, "Invalid CE ring type %d\n", type);
+ return -EINVAL;
+ }
+
+ /* TODO: Init other params needed by HAL to init the ring */
+
+ ret = ath12k_hal_srng_setup(ab, type, ce_id, 0, &params);
+ if (ret < 0) {
+ ath12k_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 ath12k_ce_ring *
+ath12k_ce_alloc_ring(struct ath12k_base *ab, int nentries, int desc_sz)
+{
+ struct ath12k_ce_ring *ce_ring;
+ dma_addr_t base_addr;
+
+ ce_ring = kzalloc(struct_size(ce_ring, skb, nentries), GFP_KERNEL);
+ if (!ce_ring)
+ 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 ath12k_ce_alloc_pipe(struct ath12k_base *ab, int ce_id)
+{
+ struct ath12k_ce_pipe *pipe = &ab->ce.ce_pipe[ce_id];
+ const struct ce_attr *attr = &ab->hw_params->host_ce_config[ce_id];
+ struct ath12k_ce_ring *ring;
+ int nentries;
+ int desc_sz;
+
+ pipe->attr_flags = attr->flags;
+
+ if (attr->src_nentries) {
+ pipe->send_cb = ath12k_ce_send_done_cb;
+ nentries = roundup_pow_of_two(attr->src_nentries);
+ desc_sz = ath12k_hal_ce_get_desc_size(HAL_CE_DESC_SRC);
+ ring = ath12k_ce_alloc_ring(ab, nentries, desc_sz);
+ if (IS_ERR(ring))
+ return PTR_ERR(ring);
+ pipe->src_ring = ring;
+ }
+
+ if (attr->dest_nentries) {
+ pipe->recv_cb = attr->recv_cb;
+ nentries = roundup_pow_of_two(attr->dest_nentries);
+ desc_sz = ath12k_hal_ce_get_desc_size(HAL_CE_DESC_DST);
+ ring = ath12k_ce_alloc_ring(ab, nentries, desc_sz);
+ if (IS_ERR(ring))
+ return PTR_ERR(ring);
+ pipe->dest_ring = ring;
+
+ desc_sz = ath12k_hal_ce_get_desc_size(HAL_CE_DESC_DST_STATUS);
+ ring = ath12k_ce_alloc_ring(ab, nentries, desc_sz);
+ if (IS_ERR(ring))
+ return PTR_ERR(ring);
+ pipe->status_ring = ring;
+ }
+
+ return 0;
+}
+
+void ath12k_ce_per_engine_service(struct ath12k_base *ab, u16 ce_id)
+{
+ struct ath12k_ce_pipe *pipe = &ab->ce.ce_pipe[ce_id];
+
+ if (pipe->send_cb)
+ pipe->send_cb(pipe);
+
+ if (pipe->recv_cb)
+ ath12k_ce_recv_process_cb(pipe);
+}
+
+void ath12k_ce_poll_send_completed(struct ath12k_base *ab, u8 pipe_id)
+{
+ struct ath12k_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 ath12k_ce_send(struct ath12k_base *ab, struct sk_buff *skb, u8 pipe_id,
+ u16 transfer_id)
+{
+ struct ath12k_ce_pipe *pipe = &ab->ce.ce_pipe[pipe_id];
+ struct hal_ce_srng_src_desc *desc;
+ struct hal_srng *srng;
+ 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 > ATH12K_CE_USAGE_THRESHOLD)
+ ath12k_ce_poll_send_completed(ab, pipe->pipe_num);
+ }
+
+ if (test_bit(ATH12K_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);
+
+ ath12k_hal_srng_access_begin(ab, srng);
+
+ if (unlikely(ath12k_hal_srng_src_num_free(ab, srng, false) < 1)) {
+ ath12k_hal_srng_access_end(ab, srng);
+ ret = -ENOBUFS;
+ goto err_unlock;
+ }
+
+ desc = ath12k_hal_srng_src_get_next_reaped(ab, srng);
+ if (!desc) {
+ ath12k_hal_srng_access_end(ab, srng);
+ ret = -ENOBUFS;
+ goto err_unlock;
+ }
+
+ if (pipe->attr_flags & CE_ATTR_BYTE_SWAP_DATA)
+ byte_swap_data = 1;
+
+ ath12k_hal_ce_src_set_desc(desc, ATH12K_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);
+
+ ath12k_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 ath12k_ce_rx_pipe_cleanup(struct ath12k_ce_pipe *pipe)
+{
+ struct ath12k_base *ab = pipe->ab;
+ struct ath12k_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, ATH12K_SKB_RXCB(skb)->paddr,
+ skb->len + skb_tailroom(skb), DMA_FROM_DEVICE);
+ dev_kfree_skb_any(skb);
+ }
+}
+
+void ath12k_ce_cleanup_pipes(struct ath12k_base *ab)
+{
+ struct ath12k_ce_pipe *pipe;
+ int pipe_num;
+
+ for (pipe_num = 0; pipe_num < ab->hw_params->ce_count; pipe_num++) {
+ pipe = &ab->ce.ce_pipe[pipe_num];
+ ath12k_ce_rx_pipe_cleanup(pipe);
+
+ /* Cleanup any src CE's which have interrupts disabled */
+ ath12k_ce_poll_send_completed(ab, pipe_num);
+
+ /* NOTE: Should we also clean up tx buffer in all pipes? */
+ }
+}
+
+void ath12k_ce_rx_post_buf(struct ath12k_base *ab)
+{
+ struct ath12k_ce_pipe *pipe;
+ int i;
+ int ret;
+
+ for (i = 0; i < ab->hw_params->ce_count; i++) {
+ pipe = &ab->ce.ce_pipe[i];
+ ret = ath12k_ce_rx_post_pipe(pipe);
+ if (ret) {
+ if (ret == -ENOSPC)
+ continue;
+
+ ath12k_warn(ab, "failed to post rx buf to pipe: %d err: %d\n",
+ i, ret);
+ mod_timer(&ab->rx_replenish_retry,
+ jiffies + ATH12K_CE_RX_POST_RETRY_JIFFIES);
+
+ return;
+ }
+ }
+}
+
+void ath12k_ce_rx_replenish_retry(struct timer_list *t)
+{
+ struct ath12k_base *ab = from_timer(ab, t, rx_replenish_retry);
+
+ ath12k_ce_rx_post_buf(ab);
+}
+
+static void ath12k_ce_shadow_config(struct ath12k_base *ab)
+{
+ int i;
+
+ for (i = 0; i < ab->hw_params->ce_count; i++) {
+ if (ab->hw_params->host_ce_config[i].src_nentries)
+ ath12k_hal_srng_update_shadow_config(ab, HAL_CE_SRC, i);
+
+ if (ab->hw_params->host_ce_config[i].dest_nentries) {
+ ath12k_hal_srng_update_shadow_config(ab, HAL_CE_DST, i);
+ ath12k_hal_srng_update_shadow_config(ab, HAL_CE_DST_STATUS, i);
+ }
+ }
+}
+
+void ath12k_ce_get_shadow_config(struct ath12k_base *ab,
+ u32 **shadow_cfg, u32 *shadow_cfg_len)
+{
+ if (!ab->hw_params->supports_shadow_regs)
+ return;
+
+ ath12k_hal_srng_get_shadow_config(ab, shadow_cfg, shadow_cfg_len);
+
+ /* shadow is already configured */
+ if (*shadow_cfg_len)
+ return;
+
+ /* shadow isn't configured yet, configure now.
+ * non-CE srngs are configured firstly, then
+ * all CE srngs.
+ */
+ ath12k_hal_srng_shadow_config(ab);
+ ath12k_ce_shadow_config(ab);
+
+ /* get the shadow configuration */
+ ath12k_hal_srng_get_shadow_config(ab, shadow_cfg, shadow_cfg_len);
+}
+
+int ath12k_ce_init_pipes(struct ath12k_base *ab)
+{
+ struct ath12k_ce_pipe *pipe;
+ int i;
+ int ret;
+
+ ath12k_ce_get_shadow_config(ab, &ab->qmi.ce_cfg.shadow_reg_v2,
+ &ab->qmi.ce_cfg.shadow_reg_v2_len);
+
+ for (i = 0; i < ab->hw_params->ce_count; i++) {
+ pipe = &ab->ce.ce_pipe[i];
+
+ if (pipe->src_ring) {
+ ret = ath12k_ce_init_ring(ab, pipe->src_ring, i,
+ HAL_CE_SRC);
+ if (ret) {
+ ath12k_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 = ath12k_ce_init_ring(ab, pipe->dest_ring, i,
+ HAL_CE_DST);
+ if (ret) {
+ ath12k_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 = ath12k_ce_init_ring(ab, pipe->status_ring, i,
+ HAL_CE_DST_STATUS);
+ if (ret) {
+ ath12k_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 ath12k_ce_free_pipes(struct ath12k_base *ab)
+{
+ struct ath12k_ce_pipe *pipe;
+ int desc_sz;
+ int i;
+
+ for (i = 0; i < ab->hw_params->ce_count; i++) {
+ pipe = &ab->ce.ce_pipe[i];
+
+ if (pipe->src_ring) {
+ desc_sz = ath12k_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 = ath12k_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 =
+ ath12k_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 ath12k_ce_alloc_pipes(struct ath12k_base *ab)
+{
+ struct ath12k_ce_pipe *pipe;
+ int i;
+ int ret;
+ const struct ce_attr *attr;
+
+ spin_lock_init(&ab->ce.ce_lock);
+
+ for (i = 0; i < ab->hw_params->ce_count; i++) {
+ attr = &ab->hw_params->host_ce_config[i];
+ pipe = &ab->ce.ce_pipe[i];
+ pipe->pipe_num = i;
+ pipe->ab = ab;
+ pipe->buf_sz = attr->src_sz_max;
+
+ ret = ath12k_ce_alloc_pipe(ab, i);
+ if (ret) {
+ /* Free any parial successful allocation */
+ ath12k_ce_free_pipes(ab);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+int ath12k_ce_get_attr_flags(struct ath12k_base *ab, int ce_id)
+{
+ if (ce_id >= ab->hw_params->ce_count)
+ return -EINVAL;
+
+ return ab->hw_params->host_ce_config[ce_id].flags;
+}