From ea4af9b4005dceb3165ece6ba21091bc6362efc4 Mon Sep 17 00:00:00 2001 From: Michal Swiatkowski Date: Thu, 19 Oct 2023 10:32:21 -0700 Subject: [PATCH] ice: add bitmap to track VF MSI-X usage 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 Reviewed-by: Przemek Kitszel Tested-by: Rafal Romanowski Signed-off-by: Jacob Keller Signed-off-by: David S. Miller --- drivers/net/ethernet/intel/ice/ice.h | 2 ++ drivers/net/ethernet/intel/ice/ice_sriov.c | 9 +++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h index 988b177d9388..351e0d36df44 100644 --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -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 */ diff --git a/drivers/net/ethernet/intel/ice/ice_sriov.c b/drivers/net/ethernet/intel/ice/ice_sriov.c index d345f5d8635b..49adb0b05817 100644 --- a/drivers/net/ethernet/intel/ice/ice_sriov.c +++ b/drivers/net/ethernet/intel/ice/ice_sriov.c @@ -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; } -- 2.49.0