/**
* i40e_shutdown_asq - shutdown the ASQ
* @hw: pointer to the hardware structure
*
* The main shutdown routine for the Admin Send Queue
**/
enum i40e_status_code i40e_shutdown_asq(struct i40e_hw *hw)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
i40e_acquire_spinlock(&hw->aq.asq_spinlock);
if (hw->aq.asq.count == 0) {
ret_code = I40E_ERR_NOT_READY;
goto shutdown_asq_out;
}
/* Stop firmware AdminQ processing */
wr32(hw, hw->aq.asq.head, 0);
wr32(hw, hw->aq.asq.tail, 0);
wr32(hw, hw->aq.asq.len, 0);
wr32(hw, hw->aq.asq.bal, 0);
wr32(hw, hw->aq.asq.bah, 0);
hw->aq.asq.count = 0; /* to indicate uninitialized queue */
/* free ring buffers */
i40e_free_asq_bufs(hw);
shutdown_asq_out:
i40e_release_spinlock(&hw->aq.asq_spinlock);
return ret_code;
}
/**
* i40e_shutdown_asq - shutdown the ASQ
* @hw: pointer to the hardware structure
*
* The main shutdown routine for the Admin Send Queue
**/
static i40e_status i40e_shutdown_asq(struct i40e_hw *hw)
{
i40e_status ret_code = 0;
mutex_lock(&hw->aq.asq_mutex);
if (hw->aq.asq.count == 0) {
ret_code = I40E_ERR_NOT_READY;
goto shutdown_asq_out;
}
/* Stop firmware AdminQ processing */
wr32(hw, hw->aq.asq.head, 0);
wr32(hw, hw->aq.asq.tail, 0);
wr32(hw, hw->aq.asq.len, 0);
wr32(hw, hw->aq.asq.bal, 0);
wr32(hw, hw->aq.asq.bah, 0);
hw->aq.asq.count = 0; /* to indicate uninitialized queue */
/* free ring buffers */
i40e_free_asq_bufs(hw);
shutdown_asq_out:
mutex_unlock(&hw->aq.asq_mutex);
return ret_code;
}
/**
* i40e_init_asq - main initialization routine for ASQ
* @hw: pointer to the hardware structure
*
* This is the main initialization routine for the Admin Send Queue
* Prior to calling this function, drivers *MUST* set the following fields
* in the hw->aq structure:
* - hw->aq.num_asq_entries
* - hw->aq.arq_buf_size
*
* Do *NOT* hold the lock when calling this as the memory allocation routines
* called are not going to be atomic context safe
**/
enum i40e_status_code i40e_init_asq(struct i40e_hw *hw)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
if (hw->aq.asq.count > 0) {
/* queue already initialized */
ret_code = I40E_ERR_NOT_READY;
goto init_adminq_exit;
}
/* verify input for valid configuration */
if ((hw->aq.num_asq_entries == 0) ||
(hw->aq.asq_buf_size == 0)) {
ret_code = I40E_ERR_CONFIG;
goto init_adminq_exit;
}
hw->aq.asq.next_to_use = 0;
hw->aq.asq.next_to_clean = 0;
/* allocate the ring memory */
ret_code = i40e_alloc_adminq_asq_ring(hw);
if (ret_code != I40E_SUCCESS)
goto init_adminq_exit;
/* allocate buffers in the rings */
ret_code = i40e_alloc_asq_bufs(hw);
if (ret_code != I40E_SUCCESS)
goto init_adminq_free_rings;
/* initialize base registers */
ret_code = i40e_config_asq_regs(hw);
if (ret_code != I40E_SUCCESS)
goto init_config_regs;
/* success! */
hw->aq.asq.count = hw->aq.num_asq_entries;
goto init_adminq_exit;
init_adminq_free_rings:
i40e_free_adminq_asq(hw);
return ret_code;
init_config_regs:
i40e_free_asq_bufs(hw);
init_adminq_exit:
return ret_code;
}
/**
* i40e_shutdown_asq - shutdown the ASQ
* @hw: pointer to the hardware structure
*
* The main shutdown routine for the Admin Send Queue
**/
enum i40e_status_code i40e_shutdown_asq(struct i40e_hw *hw)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
if (hw->aq.asq.count == 0)
return I40E_ERR_NOT_READY;
/* Stop firmware AdminQ processing */
#ifdef I40E_QV
/* Do not reset registers, as Tools AQ is shared resource for QV */
if (!hw->aq_dbg_ena) {
wr32(hw, hw->aq.asq.head, 0);
wr32(hw, hw->aq.asq.tail, 0);
wr32(hw, hw->aq.asq.len, 0);
wr32(hw, hw->aq.asq.bal, 0);
wr32(hw, hw->aq.asq.bah, 0);
}
#else
wr32(hw, hw->aq.asq.head, 0);
wr32(hw, hw->aq.asq.tail, 0);
wr32(hw, hw->aq.asq.len, 0);
wr32(hw, hw->aq.asq.bal, 0);
wr32(hw, hw->aq.asq.bah, 0);
#endif
/* make sure spinlock is available */
i40e_acquire_spinlock(&hw->aq.asq_spinlock);
hw->aq.asq.count = 0; /* to indicate uninitialized queue */
/* free ring buffers */
i40e_free_asq_bufs(hw);
i40e_release_spinlock(&hw->aq.asq_spinlock);
return ret_code;
}
