iwlwifi: tx: move handing sync/async host command to trans

Handling host commands in a sync way is not directly related to PCIe
transport, and can serve as common logic for any transport, so move
it to trans layer.

Signed-off-by: Mordechay Goodstein <mordechay.goodstein@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20210117164916.fde99af4e0f7.I4cab95919eb35cc5bfb26d32dcf5e15419d0e0ef@changeid
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

1 files changed, 3 insertions, 145 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
index 0de4c8239d7f..be2464fe0498 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx.c
@@ -909,8 +909,8 @@ void iwl_trans_pcie_txq_disable(struct iwl_trans *trans, int txq_id,
  * failed. On success, it returns the index (>= 0) of command in the
  * command queue.
  */
-static int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
-				 struct iwl_host_cmd *cmd)
+int iwl_pcie_enqueue_hcmd(struct iwl_trans *trans,
+			  struct iwl_host_cmd *cmd)
 {
 	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
 	struct iwl_txq *txq = trans->txqs.txq[trans->txqs.cmd.q_id];
@@ -1244,7 +1244,7 @@ void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
 		clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
 		IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n",
 			       iwl_get_cmd_string(trans, cmd_id));
-		wake_up(&trans_pcie->wait_command_queue);
+		wake_up(&trans->wait_command_queue);
 	}
 
 	meta->flags = 0;
@@ -1252,148 +1252,6 @@ void iwl_pcie_hcmd_complete(struct iwl_trans *trans,
 	spin_unlock_bh(&txq->lock);
 }
 
-#define HOST_COMPLETE_TIMEOUT	(2 * HZ)
-
-static int iwl_pcie_send_hcmd_async(struct iwl_trans *trans,
-				    struct iwl_host_cmd *cmd)
-{
-	int ret;
-
-	/* An asynchronous command can not expect an SKB to be set. */
-	if (WARN_ON(cmd->flags & CMD_WANT_SKB))
-		return -EINVAL;
-
-	ret = iwl_pcie_enqueue_hcmd(trans, cmd);
-	if (ret < 0) {
-		IWL_ERR(trans,
-			"Error sending %s: enqueue_hcmd failed: %d\n",
-			iwl_get_cmd_string(trans, cmd->id), ret);
-		return ret;
-	}
-	return 0;
-}
-
-static int iwl_pcie_send_hcmd_sync(struct iwl_trans *trans,
-				   struct iwl_host_cmd *cmd)
-{
-	struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans);
-	struct iwl_txq *txq = trans->txqs.txq[trans->txqs.cmd.q_id];
-	int cmd_idx;
-	int ret;
-
-	IWL_DEBUG_INFO(trans, "Attempting to send sync command %s\n",
-		       iwl_get_cmd_string(trans, cmd->id));
-
-	if (WARN(test_and_set_bit(STATUS_SYNC_HCMD_ACTIVE,
-				  &trans->status),
-		 "Command %s: a command is already active!\n",
-		 iwl_get_cmd_string(trans, cmd->id)))
-		return -EIO;
-
-	IWL_DEBUG_INFO(trans, "Setting HCMD_ACTIVE for command %s\n",
-		       iwl_get_cmd_string(trans, cmd->id));
-
-	cmd_idx = iwl_pcie_enqueue_hcmd(trans, cmd);
-	if (cmd_idx < 0) {
-		ret = cmd_idx;
-		clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
-		IWL_ERR(trans,
-			"Error sending %s: enqueue_hcmd failed: %d\n",
-			iwl_get_cmd_string(trans, cmd->id), ret);
-		return ret;
-	}
-
-	ret = wait_event_timeout(trans_pcie->wait_command_queue,
-				 !test_bit(STATUS_SYNC_HCMD_ACTIVE,
-					   &trans->status),
-				 HOST_COMPLETE_TIMEOUT);
-	if (!ret) {
-		IWL_ERR(trans, "Error sending %s: time out after %dms.\n",
-			iwl_get_cmd_string(trans, cmd->id),
-			jiffies_to_msecs(HOST_COMPLETE_TIMEOUT));
-
-		IWL_ERR(trans, "Current CMD queue read_ptr %d write_ptr %d\n",
-			txq->read_ptr, txq->write_ptr);
-
-		clear_bit(STATUS_SYNC_HCMD_ACTIVE, &trans->status);
-		IWL_DEBUG_INFO(trans, "Clearing HCMD_ACTIVE for command %s\n",
-			       iwl_get_cmd_string(trans, cmd->id));
-		ret = -ETIMEDOUT;
-
-		iwl_trans_sync_nmi(trans);
-		goto cancel;
-	}
-
-	if (test_bit(STATUS_FW_ERROR, &trans->status)) {
-		iwl_trans_pcie_dump_regs(trans);
-		IWL_ERR(trans, "FW error in SYNC CMD %s\n",
-			iwl_get_cmd_string(trans, cmd->id));
-		dump_stack();
-		ret = -EIO;
-		goto cancel;
-	}
-
-	if (!(cmd->flags & CMD_SEND_IN_RFKILL) &&
-	    test_bit(STATUS_RFKILL_OPMODE, &trans->status)) {
-		IWL_DEBUG_RF_KILL(trans, "RFKILL in SYNC CMD... no rsp\n");
-		ret = -ERFKILL;
-		goto cancel;
-	}
-
-	if ((cmd->flags & CMD_WANT_SKB) && !cmd->resp_pkt) {
-		IWL_ERR(trans, "Error: Response NULL in '%s'\n",
-			iwl_get_cmd_string(trans, cmd->id));
-		ret = -EIO;
-		goto cancel;
-	}
-
-	return 0;
-
-cancel:
-	if (cmd->flags & CMD_WANT_SKB) {
-		/*
-		 * Cancel the CMD_WANT_SKB flag for the cmd in the
-		 * TX cmd queue. Otherwise in case the cmd comes
-		 * in later, it will possibly set an invalid
-		 * address (cmd->meta.source).
-		 */
-		txq->entries[cmd_idx].meta.flags &= ~CMD_WANT_SKB;
-	}
-
-	if (cmd->resp_pkt) {
-		iwl_free_resp(cmd);
-		cmd->resp_pkt = NULL;
-	}
-
-	return ret;
-}
-
-int iwl_trans_pcie_send_hcmd(struct iwl_trans *trans, struct iwl_host_cmd *cmd)
-{
-	/* Make sure the NIC is still alive in the bus */
-	if (test_bit(STATUS_TRANS_DEAD, &trans->status))
-		return -ENODEV;
-
-	if (!(cmd->flags & CMD_SEND_IN_RFKILL) &&
-	    test_bit(STATUS_RFKILL_OPMODE, &trans->status)) {
-		IWL_DEBUG_RF_KILL(trans, "Dropping CMD 0x%x: RF KILL\n",
-				  cmd->id);
-		return -ERFKILL;
-	}
-
-	if (unlikely(trans->system_pm_mode == IWL_PLAT_PM_MODE_D3 &&
-		     !(cmd->flags & CMD_SEND_IN_D3))) {
-		IWL_DEBUG_WOWLAN(trans, "Dropping CMD 0x%x: D3\n", cmd->id);
-		return -EHOSTDOWN;
-	}
-
-	if (cmd->flags & CMD_ASYNC)
-		return iwl_pcie_send_hcmd_async(trans, cmd);
-
-	/* We still can fail on RFKILL that can be asserted while we wait */
-	return iwl_pcie_send_hcmd_sync(trans, cmd);
-}
-
 static int iwl_fill_data_tbs(struct iwl_trans *trans, struct sk_buff *skb,
 			     struct iwl_txq *txq, u8 hdr_len,
 			     struct iwl_cmd_meta *out_meta)