i40e: let firmware catch the NVM busy error

The NVM update operations take time finish asynchronously, and follow-on
update requests need to wait for the current one to finish.  Early
firmware didn't handle this well, so the code had to track the busy state.
The released firmware handles the busy state correctly, returning
I40E_AQ_RC_EBUSY if an update is still in progress, so the code no longer
needs to track this.

Change-ID: I6e6b4adc26d6dcc5fd7adfee5763423858a7d921
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Jim Young <jamesx.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_adminq.c

@@ -617,7 +617,6 @@ i40e_status i40e_init_adminq(struct i40e_hw *hw)
 
 	/* pre-emptive resource lock release */
 	i40e_aq_release_resource(hw, I40E_NVM_RESOURCE_ID, 0, NULL);
-	hw->aq.nvm_busy = false;
 
 	ret_code = i40e_aq_set_hmc_resource_profile(hw,
 						    I40E_HMC_PROFILE_DEFAULT,
@@ -754,12 +753,6 @@ i40e_status i40e_asq_send_command(struct i40e_hw *hw,
 		goto asq_send_command_exit;
 	}
 
-	if (i40e_is_nvm_update_op(desc) && hw->aq.nvm_busy) {
-		i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQTX: NVM busy.\n");
-		status = I40E_ERR_NVM;
-		goto asq_send_command_exit;
-	}
-
 	details = I40E_ADMINQ_DETAILS(hw->aq.asq, hw->aq.asq.next_to_use);
 	if (cmd_details) {
 		*details = *cmd_details;
@@ -901,9 +894,6 @@ i40e_status i40e_asq_send_command(struct i40e_hw *hw,
 		status = I40E_ERR_ADMIN_QUEUE_TIMEOUT;
 	}
 
-	if (!status && i40e_is_nvm_update_op(desc))
-		hw->aq.nvm_busy = true;
-
 asq_send_command_error:
 	mutex_unlock(&hw->aq.asq_mutex);
 asq_send_command_exit:
@@ -1016,7 +1006,6 @@ i40e_status i40e_clean_arq_element(struct i40e_hw *hw,
 	mutex_unlock(&hw->aq.arq_mutex);
 
 	if (i40e_is_nvm_update_op(&e->desc)) {
-		hw->aq.nvm_busy = false;
 		if (hw->aq.nvm_release_on_done) {
 			i40e_release_nvm(hw);
 			hw->aq.nvm_release_on_done = false;

drivers/net/ethernet/intel/i40e/i40e_adminq.h

@@ -94,7 +94,6 @@ struct i40e_adminq_info {
 	u16 fw_min_ver;                 /* firmware minor version */
 	u16 api_maj_ver;                /* api major version */
 	u16 api_min_ver;                /* api minor version */
-	bool nvm_busy;
 	bool nvm_release_on_done;
 
 	struct mutex asq_mutex; /* Send queue lock */

drivers/net/ethernet/intel/i40evf/i40e_adminq.c

@@ -836,9 +836,6 @@ i40e_status i40evf_asq_send_command(struct i40e_hw *hw,
 		hw->aq.asq_last_status = (enum i40e_admin_queue_err)retval;
 	}
 
-	if (i40e_is_nvm_update_op(desc))
-		hw->aq.nvm_busy = true;
-
 	i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
 		   "AQTX: desc and buffer writeback:\n");
 	i40evf_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, buff,
@@ -931,9 +928,6 @@ i40e_status i40evf_clean_arq_element(struct i40e_hw *hw,
 		memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
 		       e->msg_len);
 
-	if (i40e_is_nvm_update_op(&e->desc))
-		hw->aq.nvm_busy = false;
-
 	i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
 	i40evf_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
 			hw->aq.arq_buf_size);

drivers/net/ethernet/intel/i40evf/i40e_adminq.h

@@ -94,7 +94,6 @@ struct i40e_adminq_info {
 	u16 fw_min_ver;                 /* firmware minor version */
 	u16 api_maj_ver;                /* api major version */
 	u16 api_min_ver;                /* api minor version */
-	bool nvm_busy;
 	bool nvm_release_on_done;
 
 	struct mutex asq_mutex; /* Send queue lock */