drivers/net/ethernet/intel/ice/virt/queues.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/intel/ice/virt/queues.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/intel/ice/virt/queues.c
Extension
.c
Size
27347 bytes
Lines
976
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (n_used < per_pf) {
			*quanta_prof_idx = begin_id + 1 + n_used;
			pf->num_quanta_prof_used++;
		} else {
			return -EINVAL;
		}
	}

	reg = FIELD_PREP(GLCOMM_QUANTA_PROF_QUANTA_SIZE_M, quanta_size) |
	      FIELD_PREP(GLCOMM_QUANTA_PROF_MAX_CMD_M, n_cmd) |
	      FIELD_PREP(GLCOMM_QUANTA_PROF_MAX_DESC_M, n_desc);
	wr32(hw, GLCOMM_QUANTA_PROF(*quanta_prof_idx), reg);

	return 0;
}

/**
 * ice_vc_validate_vqs_bitmaps - validate Rx/Tx queue bitmaps from VIRTCHNL
 * @vqs: virtchnl_queue_select structure containing bitmaps to validate
 *
 * Return true on successful validation, else false
 */
static bool ice_vc_validate_vqs_bitmaps(struct virtchnl_queue_select *vqs)
{
	if ((!vqs->rx_queues && !vqs->tx_queues) ||
	    vqs->rx_queues >= BIT(ICE_MAX_RSS_QS_PER_VF) ||
	    vqs->tx_queues >= BIT(ICE_MAX_RSS_QS_PER_VF))
		return false;

	return true;
}

/**
 * ice_vf_ena_txq_interrupt - enable Tx queue interrupt via QINT_TQCTL
 * @vsi: VSI of the VF to configure
 * @q_idx: VF queue index used to determine the queue in the PF's space
 */
void ice_vf_ena_txq_interrupt(struct ice_vsi *vsi, u32 q_idx)
{
	struct ice_hw *hw = &vsi->back->hw;
	u32 pfq = vsi->txq_map[q_idx];
	u32 reg;

	reg = rd32(hw, QINT_TQCTL(pfq));

	/* MSI-X index 0 in the VF's space is always for the OICR, which means
	 * this is most likely a poll mode VF driver, so don't enable an
	 * interrupt that was never configured via VIRTCHNL_OP_CONFIG_IRQ_MAP
	 */
	if (!(reg & QINT_TQCTL_MSIX_INDX_M))
		return;

	wr32(hw, QINT_TQCTL(pfq), reg | QINT_TQCTL_CAUSE_ENA_M);
}

/**
 * ice_vf_ena_rxq_interrupt - enable Tx queue interrupt via QINT_RQCTL
 * @vsi: VSI of the VF to configure
 * @q_idx: VF queue index used to determine the queue in the PF's space
 */
void ice_vf_ena_rxq_interrupt(struct ice_vsi *vsi, u32 q_idx)
{
	struct ice_hw *hw = &vsi->back->hw;
	u32 pfq = vsi->rxq_map[q_idx];
	u32 reg;

	reg = rd32(hw, QINT_RQCTL(pfq));

	/* MSI-X index 0 in the VF's space is always for the OICR, which means
	 * this is most likely a poll mode VF driver, so don't enable an
	 * interrupt that was never configured via VIRTCHNL_OP_CONFIG_IRQ_MAP
	 */
	if (!(reg & QINT_RQCTL_MSIX_INDX_M))
		return;

	wr32(hw, QINT_RQCTL(pfq), reg | QINT_RQCTL_CAUSE_ENA_M);
}

/**
 * ice_vc_ena_qs_msg
 * @vf: pointer to the VF info
 * @msg: pointer to the msg buffer
 *
 * called from the VF to enable all or specific queue(s)
 */
int ice_vc_ena_qs_msg(struct ice_vf *vf, u8 *msg)
{
	enum virtchnl_status_code v_ret = VIRTCHNL_STATUS_SUCCESS;
	struct virtchnl_queue_select *vqs =
	    (struct virtchnl_queue_select *)msg;

Annotation

Implementation Notes