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ice: add bitmap to track VF MSI-X usage

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Create a bitamp to track MSI-X usage for VFs. The bitmap has the size of
total MSI-X amount on device, because at init time the amount of MSI-X
used by VFs isn't known.

The bitmap is used in follow up patchset to provide a block of
continuous block of MSI-X indexes for each created VF.

Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michal Swiatkowski 2023-10-19 10:32:21 -07:00 • committed by David S. Miller
parent fe1c5ca2fe
commit ea4af9b400
2 changed files with 11 additions and 0 deletions
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2
drivers/net/ethernet/intel/ice/ice.h
View file

@ -554,6 +554,8 @@ struct ice_pf {
* MSIX vectors allowed on this PF.
*/
u16 sriov_base_vector;
unsigned long *sriov_irq_bm; /* bitmap to track irq usage */
u16 sriov_irq_size; /* size of the irq_bm bitmap */
u16 ctrl_vsi_idx; /* control VSI index in pf->vsi array */

9
drivers/net/ethernet/intel/ice/ice_sriov.c
View file

@ -138,6 +138,8 @@ static int ice_sriov_free_msix_res(struct ice_pf *pf)
if (!pf)
return -EINVAL;
bitmap_free(pf->sriov_irq_bm);
pf->sriov_irq_size = 0;
pf->sriov_base_vector = 0;
return 0;
@ -853,10 +855,16 @@ err_free_entries:
*/
static int ice_ena_vfs(struct ice_pf *pf, u16 num_vfs)
{
int total_vectors = pf->hw.func_caps.common_cap.num_msix_vectors;
struct device *dev = ice_pf_to_dev(pf);
struct ice_hw *hw = &pf->hw;
int ret;
pf->sriov_irq_bm = bitmap_zalloc(total_vectors, GFP_KERNEL);
if (!pf->sriov_irq_bm)
return -ENOMEM;
pf->sriov_irq_size = total_vectors;
/* Disable global interrupt 0 so we don't try to handle the VFLR. */
wr32(hw, GLINT_DYN_CTL(pf->oicr_irq.index),
ICE_ITR_NONE << GLINT_DYN_CTL_ITR_INDX_S);
@ -915,6 +923,7 @@ err_unroll_intr:
/* rearm interrupts here */
ice_irq_dynamic_ena(hw, NULL, NULL);
clear_bit(ICE_OICR_INTR_DIS, pf->state);
bitmap_free(pf->sriov_irq_bm);
return ret;
}