ice: simplify VF MSI-X managing

After implementing pf->msix.max field, base vector for other use cases
(like VFs) can be fixed. This simplify code when changing MSI-X amount
on particular VF, because there is no need to move a base vector.

A fixed base vector allows to reserve vectors from the beginning
instead of from the end, which is also simpler in code.

Store total and rest value in the same struct as max and min for PF.
Move tracking vectors from ice_sriov.c to ice_irq.c as it can be also
use for other none PF use cases (SIOV).

Tested-by: Rafal Romanowski <[email protected]>
Signed-off-by: Michal Swiatkowski <[email protected]>
Signed-off-by: Tony Nguyen <[email protected]>

1 files changed, 12 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_irq.h b/drivers/net/ethernet/intel/ice/ice_irq.h
index f35efc08575e..b2f9dbafd57e 100644
--- a/drivers/net/ethernet/intel/ice/ice_irq.h
+++ b/drivers/net/ethernet/intel/ice/ice_irq.h
@@ -15,11 +15,22 @@ struct ice_irq_tracker {
 	u16 num_static;	/* preallocated entries */
 };
 
+struct ice_virt_irq_tracker {
+	unsigned long *bm;	/* bitmap to track irq usage */
+	u32 num_entries;
+	/* First MSIX vector used by SR-IOV VFs. Calculated by subtracting the
+	 * number of MSIX vectors needed for all SR-IOV VFs from the number of
+	 * MSIX vectors allowed on this PF.
+	 */
+	u32 base;
+};
+
 int ice_init_interrupt_scheme(struct ice_pf *pf);
 void ice_clear_interrupt_scheme(struct ice_pf *pf);
 
 struct msi_map ice_alloc_irq(struct ice_pf *pf, bool dyn_only);
 void ice_free_irq(struct ice_pf *pf, struct msi_map map);
-int ice_get_max_used_msix_vector(struct ice_pf *pf);
 
+int ice_virt_get_irqs(struct ice_pf *pf, u32 needed);
+void ice_virt_free_irqs(struct ice_pf *pf, u32 index, u32 irqs);
 #endif