* @wd_timeout: queue watchdog timeout (jiffies) - per queue
* @frozen: tx stuck queue timer is frozen
* @frozen_expiry_remainder: remember how long until the timer fires
+ * @bc_tbl: byte count table of the queue (relevant only for gen2 transport)
* @write_ptr: 1-st empty entry (index) host_w
* @read_ptr: last used entry (index) host_r
* @dma_addr: physical addr for BD's
int block;
unsigned long wd_timeout;
struct sk_buff_head overflow_q;
+ struct iwl_dma_ptr bc_tbl;
int write_ptr;
int read_ptr;
int iwl_queue_space(const struct iwl_txq *q);
int iwl_pcie_apm_stop_master(struct iwl_trans *trans);
void iwl_pcie_conf_msix_hw(struct iwl_trans_pcie *trans_pcie);
+int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq,
+ int slots_num, u32 txq_id);
+int iwl_pcie_txq_alloc(struct iwl_trans *trans,
+ struct iwl_txq *txq, int slots_num, u32 txq_id);
+int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans,
+ struct iwl_dma_ptr *ptr, size_t size);
+void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr);
/* transport gen 2 exported functions */
int iwl_trans_pcie_gen2_start_fw(struct iwl_trans *trans,
void iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans,
bool low_power);
void _iwl_trans_pcie_gen2_stop_device(struct iwl_trans *trans, bool low_power);
-
+void iwl_pcie_gen2_txq_unmap(struct iwl_trans *trans, int txq_id);
+void iwl_pcie_gen2_tx_free(struct iwl_trans *trans);
+void iwl_pcie_gen2_tx_stop(struct iwl_trans *trans);
#endif /* __iwl_trans_int_pcie_h__ */
#include "internal.h"
#include "mvm/fw-api.h"
+ /*
+ * iwl_pcie_gen2_tx_stop - Stop all Tx DMA channels
+ */
+void iwl_pcie_gen2_tx_stop(struct iwl_trans *trans)
+{
+ struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+ int txq_id;
+
+ /*
+ * This function can be called before the op_mode disabled the
+ * queues. This happens when we have an rfkill interrupt.
+ * Since we stop Tx altogether - mark the queues as stopped.
+ */
+ memset(trans_pcie->queue_stopped, 0, sizeof(trans_pcie->queue_stopped));
+ memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used));
+
+ /* Unmap DMA from host system and free skb's */
+ for (txq_id = 0; txq_id < ARRAY_SIZE(trans_pcie->txq); txq_id++) {
+ if (!trans_pcie->txq[txq_id])
+ continue;
+ iwl_pcie_gen2_txq_unmap(trans, txq_id);
+ }
+}
+
/*
* iwl_pcie_txq_update_byte_tbl - Set up entry in Tx byte-count array
*/
-static void iwl_pcie_gen2_update_byte_tbl(struct iwl_trans *trans,
- struct iwl_txq *txq, u16 byte_cnt,
- int num_tbs)
+static void iwl_pcie_gen2_update_byte_tbl(struct iwl_txq *txq, u16 byte_cnt,
+ int num_tbs)
{
- struct iwlagn_scd_bc_tbl *scd_bc_tbl;
- struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+ struct iwlagn_scd_bc_tbl *scd_bc_tbl = txq->bc_tbl.addr;
int write_ptr = txq->write_ptr;
u8 filled_tfd_size, num_fetch_chunks;
u16 len = byte_cnt;
__le16 bc_ent;
- scd_bc_tbl = trans_pcie->scd_bc_tbls.addr;
-
len = DIV_ROUND_UP(len, 4);
if (WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX))
num_fetch_chunks = DIV_ROUND_UP(filled_tfd_size, 64) - 1;
bc_ent = cpu_to_le16(len | (num_fetch_chunks << 12));
- scd_bc_tbl[txq->id].tfd_offset[write_ptr] = bc_ent;
+ scd_bc_tbl->tfd_offset[write_ptr] = bc_ent;
}
/*
struct iwl_tfh_tb *tb = &tfd->tbs[idx];
/* Each TFD can point to a maximum max_tbs Tx buffers */
- if (tfd->num_tbs >= trans_pcie->max_tbs) {
+ if (le16_to_cpu(tfd->num_tbs) >= trans_pcie->max_tbs) {
IWL_ERR(trans, "Error can not send more than %d chunks\n",
trans_pcie->max_tbs);
return -EINVAL;
}
/* Set up entry for this TFD in Tx byte-count array */
- iwl_pcie_gen2_update_byte_tbl(trans, txq, le16_to_cpu(tx_cmd->len),
+ iwl_pcie_gen2_update_byte_tbl(txq, le16_to_cpu(tx_cmd->len),
iwl_pcie_gen2_get_num_tbs(trans, tfd));
/* start timer if queue currently empty */
iwl_wake_queue(trans, txq);
}
+/*
+ * iwl_pcie_txq_free - Deallocate DMA queue.
+ * @txq: Transmit queue to deallocate.
+ *
+ * Empty queue by removing and destroying all BD's.
+ * Free all buffers.
+ * 0-fill, but do not free "txq" descriptor structure.
+ */
+static void iwl_pcie_gen2_txq_free(struct iwl_trans *trans, int txq_id)
+{
+ struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+ struct iwl_txq *txq = trans_pcie->txq[txq_id];
+ struct device *dev = trans->dev;
+ int i;
+
+ if (WARN_ON(!txq))
+ return;
+
+ iwl_pcie_gen2_txq_unmap(trans, txq_id);
+
+ /* De-alloc array of command/tx buffers */
+ if (txq_id == trans_pcie->cmd_queue)
+ for (i = 0; i < txq->n_window; i++) {
+ kzfree(txq->entries[i].cmd);
+ kzfree(txq->entries[i].free_buf);
+ }
+
+ /* De-alloc circular buffer of TFDs */
+ if (txq->tfds) {
+ dma_free_coherent(dev,
+ trans_pcie->tfd_size * TFD_QUEUE_SIZE_MAX,
+ txq->tfds, txq->dma_addr);
+ dma_free_coherent(dev,
+ sizeof(*txq->first_tb_bufs) * txq->n_window,
+ txq->first_tb_bufs, txq->first_tb_dma);
+ }
+
+ kfree(txq->entries);
+
+ del_timer_sync(&txq->stuck_timer);
+
+ iwl_pcie_free_dma_ptr(trans, &txq->bc_tbl);
+ kfree(txq);
+ trans_pcie->txq[txq_id] = NULL;
+
+ clear_bit(txq_id, trans_pcie->queue_used);
+}
+
int iwl_trans_pcie_dyn_txq_alloc(struct iwl_trans *trans,
struct iwl_tx_queue_cfg_cmd *cmd,
int cmd_id,
unsigned int timeout)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
- struct iwl_txq *txq = trans_pcie->txq[cmd->scd_queue];
+ struct iwl_txq *txq;
struct iwl_host_cmd hcmd = {
.id = cmd_id,
.len = { sizeof(*cmd) },
.data = { cmd, },
.flags = 0,
};
+ int ret, qid = cmd->scd_queue;
u16 ssn = le16_to_cpu(cmd->ssn);
+ txq = kzalloc(sizeof(*txq), GFP_KERNEL);
+ if (!txq)
+ return -ENOMEM;
+ ret = iwl_pcie_alloc_dma_ptr(trans, &txq->bc_tbl,
+ sizeof(struct iwlagn_scd_bc_tbl));
+ if (ret) {
+ IWL_ERR(trans, "Scheduler BC Table allocation failed\n");
+ kfree(txq);
+ return -ENOMEM;
+ }
+
if (test_and_set_bit(cmd->scd_queue, trans_pcie->queue_used)) {
WARN_ONCE(1, "queue %d already used", cmd->scd_queue);
return -EINVAL;
}
+ trans_pcie->txq[qid] = txq;
+
+ ret = iwl_pcie_txq_alloc(trans, txq, TFD_TX_CMD_SLOTS, qid);
+ if (ret) {
+ IWL_ERR(trans, "Tx %d queue init failed\n", qid);
+ goto error;
+ }
+ ret = iwl_pcie_txq_init(trans, txq, TFD_TX_CMD_SLOTS, qid);
+ if (ret) {
+ IWL_ERR(trans, "Tx %d queue alloc failed\n", qid);
+ goto error;
+ }
+
txq->wd_timeout = msecs_to_jiffies(timeout);
/*
cmd->scd_queue, ssn & 0xff);
cmd->tfdq_addr = cpu_to_le64(txq->dma_addr);
- cmd->byte_cnt_addr = cpu_to_le64(trans_pcie->scd_bc_tbls.dma +
- cmd->scd_queue *
- sizeof(struct iwlagn_scd_bc_tbl));
- cmd->cb_size = cpu_to_le64(TFD_QUEUE_CB_SIZE(TFD_QUEUE_SIZE_MAX));
+ cmd->byte_cnt_addr = cpu_to_le64(txq->bc_tbl.dma);
+ cmd->cb_size = cpu_to_le32(TFD_QUEUE_CB_SIZE(TFD_QUEUE_SIZE_MAX));
return iwl_trans_send_cmd(trans, &hcmd);
+
+error:
+ iwl_pcie_gen2_txq_free(trans, cmd->scd_queue);
+ return -ENOMEM;
}
void iwl_trans_pcie_dyn_txq_free(struct iwl_trans *trans, int queue)
IWL_DEBUG_TX_QUEUES(trans, "Deactivate queue %d\n", queue);
}
+void iwl_pcie_gen2_tx_free(struct iwl_trans *trans)
+{
+ struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+ int i;
+
+ memset(trans_pcie->queue_used, 0, sizeof(trans_pcie->queue_used));
+
+ /* Free all TX queues */
+ for (i = 0; i < ARRAY_SIZE(trans_pcie->txq); i++) {
+ if (!trans_pcie->txq[i])
+ continue;
+
+ iwl_pcie_gen2_txq_free(trans, i);
+ }
+}
+
+int iwl_pcie_gen2_tx_init(struct iwl_trans *trans)
+{
+ struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
+ struct iwl_txq *cmd_queue;
+ int txq_id = trans_pcie->cmd_queue, ret;
+
+ /* alloc and init the command queue */
+ if (!trans_pcie->txq[txq_id]) {
+ cmd_queue = kzalloc(sizeof(*cmd_queue), GFP_KERNEL);
+ if (!cmd_queue) {
+ IWL_ERR(trans, "Not enough memory for command queue\n");
+ return -ENOMEM;
+ }
+ trans_pcie->txq[txq_id] = cmd_queue;
+ ret = iwl_pcie_txq_alloc(trans, cmd_queue, TFD_CMD_SLOTS,
+ txq_id);
+ if (ret) {
+ IWL_ERR(trans, "Tx %d queue init failed\n", txq_id);
+ goto error;
+ }
+ } else {
+ cmd_queue = trans_pcie->txq[txq_id];
+ }
+
+ ret = iwl_pcie_txq_init(trans, cmd_queue, TFD_CMD_SLOTS, txq_id);
+ if (ret) {
+ IWL_ERR(trans, "Tx %d queue alloc failed\n", txq_id);
+ goto error;
+ }
+ set_bit(txq_id, trans_pcie->queue_used);
+
+ return 0;
+
+error:
+ iwl_pcie_gen2_tx_free(trans);
+ return ret;
+}
+
return 0;
}
-static int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans,
- struct iwl_dma_ptr *ptr, size_t size)
+int iwl_pcie_alloc_dma_ptr(struct iwl_trans *trans,
+ struct iwl_dma_ptr *ptr, size_t size)
{
if (WARN_ON(ptr->addr))
return -EINVAL;
return 0;
}
-static void iwl_pcie_free_dma_ptr(struct iwl_trans *trans,
- struct iwl_dma_ptr *ptr)
+void iwl_pcie_free_dma_ptr(struct iwl_trans *trans, struct iwl_dma_ptr *ptr)
{
if (unlikely(!ptr->addr))
return;
return num_tbs;
}
-static int iwl_pcie_txq_alloc(struct iwl_trans *trans,
- struct iwl_txq *txq, int slots_num,
- u32 txq_id)
+int iwl_pcie_txq_alloc(struct iwl_trans *trans, struct iwl_txq *txq,
+ int slots_num, u32 txq_id)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
size_t tfd_sz = trans_pcie->tfd_size * TFD_QUEUE_SIZE_MAX;
}
-static int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq,
- int slots_num, u32 txq_id)
+int iwl_pcie_txq_init(struct iwl_trans *trans, struct iwl_txq *txq,
+ int slots_num, u32 txq_id)
{
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int ret;
struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
int txq_id;
+ /*
+ * we should never get here in gen2 trans mode return early to avoid
+ * having invalid accesses
+ */
+ if (WARN_ON_ONCE(trans->cfg->gen2))
+ return;
+
for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues;
txq_id++) {
struct iwl_txq *txq = trans_pcie->txq[txq_id];
return ret;
}
-int iwl_pcie_gen2_tx_init(struct iwl_trans *trans)
-{
- struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
- int ret;
- int txq_id, slots_num;
- bool alloc = false;
-
- if (!trans_pcie->txq_memory) {
- /* TODO: change this when moving to new TX alloc model */
- ret = iwl_pcie_tx_alloc(trans);
- if (ret)
- goto error;
- alloc = true;
- }
-
- spin_lock(&trans_pcie->irq_lock);
-
- /* Tell NIC where to find the "keep warm" buffer */
- iwl_write_direct32(trans, FH_KW_MEM_ADDR_REG,
- trans_pcie->kw.dma >> 4);
-
- spin_unlock(&trans_pcie->irq_lock);
-
- /* TODO: remove this when moving to new TX alloc model */
- for (txq_id = 0; txq_id < trans->cfg->base_params->num_of_queues;
- txq_id++) {
- slots_num = (txq_id == trans_pcie->cmd_queue) ?
- TFD_CMD_SLOTS : TFD_TX_CMD_SLOTS;
- ret = iwl_pcie_txq_init(trans, trans_pcie->txq[txq_id],
- slots_num, txq_id);
- if (ret) {
- IWL_ERR(trans, "Tx %d queue init failed\n", txq_id);
- goto error;
- }
- }
-
- return 0;
-
-error:
- /* Upon error, free only if we allocated something */
- if (alloc)
- iwl_pcie_tx_free(trans);
- return ret;
-}
-
static inline void iwl_pcie_txq_progress(struct iwl_txq *txq)
{
lockdep_assert_held(&txq->lock);
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