/**
* i40e_clean_arq_element
* @hw: pointer to the hw struct
* @e: event info from the receive descriptor, includes any buffers
* @pending: number of events that could be left to process
*
* This function cleans one Admin Receive Queue element and returns
* the contents through e. It can also return how many events are
* left to process through 'pending'
**/
enum i40e_status_code i40e_clean_arq_element(struct i40e_hw *hw,
struct i40e_arq_event_info *e,
u16 *pending)
{
enum i40e_status_code ret_code = I40E_SUCCESS;
u16 ntc = hw->aq.arq.next_to_clean;
struct i40e_aq_desc *desc;
struct i40e_dma_mem *bi;
u16 desc_idx;
u16 datalen;
u16 flags;
u16 ntu;
/* pre-clean the event info */
i40e_memset(&e->desc, 0, sizeof(e->desc), I40E_NONDMA_MEM);
/* take the lock before we start messing with the ring */
i40e_acquire_spinlock(&hw->aq.arq_spinlock);
if (hw->aq.arq.count == 0) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQRX: Admin queue not initialized.\n");
ret_code = I40E_ERR_QUEUE_EMPTY;
goto clean_arq_element_err;
}
/* set next_to_use to head */
#ifdef INTEGRATED_VF
if (!i40e_is_vf(hw))
ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
else
ntu = rd32(hw, hw->aq.arq.head) & I40E_VF_ARQH1_ARQH_MASK;
#else
#ifdef PF_DRIVER
ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
#endif /* PF_DRIVER */
#ifdef VF_DRIVER
ntu = rd32(hw, hw->aq.arq.head) & I40E_VF_ARQH1_ARQH_MASK;
#endif /* VF_DRIVER */
#endif /* INTEGRATED_VF */
if (ntu == ntc) {
/* nothing to do - shouldn't need to update ring's values */
ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
goto clean_arq_element_out;
}
/* now clean the next descriptor */
desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
desc_idx = ntc;
hw->aq.arq_last_status =
(enum i40e_admin_queue_err)LE16_TO_CPU(desc->retval);
flags = LE16_TO_CPU(desc->flags);
if (flags & I40E_AQ_FLAG_ERR) {
ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQRX: Event received with error 0x%X.\n",
hw->aq.arq_last_status);
}
i40e_memcpy(&e->desc, desc, sizeof(struct i40e_aq_desc),
I40E_DMA_TO_NONDMA);
datalen = LE16_TO_CPU(desc->datalen);
e->msg_len = min(datalen, e->buf_len);
if (e->msg_buf != NULL && (e->msg_len != 0))
i40e_memcpy(e->msg_buf,
hw->aq.arq.r.arq_bi[desc_idx].va,
e->msg_len, I40E_DMA_TO_NONDMA);
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
hw->aq.arq_buf_size);
/* Restore the original datalen and buffer address in the desc,
* FW updates datalen to indicate the event message
* size
*/
bi = &hw->aq.arq.r.arq_bi[ntc];
i40e_memset((void *)desc, 0, sizeof(struct i40e_aq_desc), I40E_DMA_MEM);
desc->flags = CPU_TO_LE16(I40E_AQ_FLAG_BUF);
if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
desc->flags |= CPU_TO_LE16(I40E_AQ_FLAG_LB);
desc->datalen = CPU_TO_LE16((u16)bi->size);
desc->params.external.addr_high = CPU_TO_LE32(I40E_HI_DWORD(bi->pa));
desc->params.external.addr_low = CPU_TO_LE32(I40E_LO_DWORD(bi->pa));
/* set tail = the last cleaned desc index. */
wr32(hw, hw->aq.arq.tail, ntc);
/* ntc is updated to tail + 1 */
ntc++;
if (ntc == hw->aq.num_arq_entries)
ntc = 0;
hw->aq.arq.next_to_clean = ntc;
hw->aq.arq.next_to_use = ntu;
#ifdef PF_DRIVER
i40e_nvmupd_check_wait_event(hw, LE16_TO_CPU(e->desc.opcode), &e->desc);
#endif /* PF_DRIVER */
clean_arq_element_out:
/* Set pending if needed, unlock and return */
if (pending != NULL)
*pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
clean_arq_element_err:
i40e_release_spinlock(&hw->aq.arq_spinlock);
return ret_code;
}
/**
* i40e_clean_arq_element
* @hw: pointer to the hw struct
* @e: event info from the receive descriptor, includes any buffers
* @pending: number of events that could be left to process
*
* This function cleans one Admin Receive Queue element and returns
* the contents through e. It can also return how many events are
* left to process through 'pending'
**/
i40e_status i40e_clean_arq_element(struct i40e_hw *hw,
struct i40e_arq_event_info *e,
u16 *pending)
{
i40e_status ret_code = 0;
u16 ntc = hw->aq.arq.next_to_clean;
struct i40e_aq_desc *desc;
struct i40e_dma_mem *bi;
u16 desc_idx;
u16 datalen;
u16 flags;
u16 ntu;
/* pre-clean the event info */
memset(&e->desc, 0, sizeof(e->desc));
/* take the lock before we start messing with the ring */
mutex_lock(&hw->aq.arq_mutex);
if (hw->aq.arq.count == 0) {
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE,
"AQRX: Admin queue not initialized.\n");
ret_code = I40E_ERR_QUEUE_EMPTY;
goto clean_arq_element_err;
}
/* set next_to_use to head */
ntu = rd32(hw, hw->aq.arq.head) & I40E_PF_ARQH_ARQH_MASK;
if (ntu == ntc) {
/* nothing to do - shouldn't need to update ring's values */
ret_code = I40E_ERR_ADMIN_QUEUE_NO_WORK;
goto clean_arq_element_out;
}
/* now clean the next descriptor */
desc = I40E_ADMINQ_DESC(hw->aq.arq, ntc);
desc_idx = ntc;
hw->aq.arq_last_status =
(enum i40e_admin_queue_err)le16_to_cpu(desc->retval);
flags = le16_to_cpu(desc->flags);
if (flags & I40E_AQ_FLAG_ERR) {
ret_code = I40E_ERR_ADMIN_QUEUE_ERROR;
i40e_debug(hw,
I40E_DEBUG_AQ_MESSAGE,
"AQRX: Event received with error 0x%X.\n",
hw->aq.arq_last_status);
}
e->desc = *desc;
datalen = le16_to_cpu(desc->datalen);
e->msg_len = min(datalen, e->buf_len);
if (e->msg_buf != NULL && (e->msg_len != 0))
memcpy(e->msg_buf, hw->aq.arq.r.arq_bi[desc_idx].va,
e->msg_len);
i40e_debug(hw, I40E_DEBUG_AQ_MESSAGE, "AQRX: desc and buffer:\n");
i40e_debug_aq(hw, I40E_DEBUG_AQ_COMMAND, (void *)desc, e->msg_buf,
hw->aq.arq_buf_size);
/* Restore the original datalen and buffer address in the desc,
* FW updates datalen to indicate the event message
* size
*/
bi = &hw->aq.arq.r.arq_bi[ntc];
memset((void *)desc, 0, sizeof(struct i40e_aq_desc));
desc->flags = cpu_to_le16(I40E_AQ_FLAG_BUF);
if (hw->aq.arq_buf_size > I40E_AQ_LARGE_BUF)
desc->flags |= cpu_to_le16(I40E_AQ_FLAG_LB);
desc->datalen = cpu_to_le16((u16)bi->size);
desc->params.external.addr_high = cpu_to_le32(upper_32_bits(bi->pa));
desc->params.external.addr_low = cpu_to_le32(lower_32_bits(bi->pa));
/* set tail = the last cleaned desc index. */
wr32(hw, hw->aq.arq.tail, ntc);
/* ntc is updated to tail + 1 */
ntc++;
if (ntc == hw->aq.num_arq_entries)
ntc = 0;
hw->aq.arq.next_to_clean = ntc;
hw->aq.arq.next_to_use = ntu;
i40e_nvmupd_check_wait_event(hw, le16_to_cpu(e->desc.opcode), &e->desc);
clean_arq_element_out:
/* Set pending if needed, unlock and return */
if (pending)
*pending = (ntc > ntu ? hw->aq.arq.count : 0) + (ntu - ntc);
clean_arq_element_err:
mutex_unlock(&hw->aq.arq_mutex);
return ret_code;
}
