#define ICE_Q_WAIT_RETRY_LIMIT 10
#define ICE_Q_WAIT_MAX_RETRY (5 * ICE_Q_WAIT_RETRY_LIMIT)
#define ICE_MAX_LG_RSS_QS 256
-#define ICE_RES_VALID_BIT 0x8000
#define ICE_INVAL_Q_INDEX 0xffff
#define ICE_MAX_RXQS_PER_TC 256 /* Used when setting VSI context per TC Rx queues */
struct ice_tc_info tc_info[ICE_MAX_TRAFFIC_CLASS];
};
-struct ice_res_tracker {
- u16 num_entries;
- u16 end;
- u16 list[];
-};
-
struct ice_qs_cfg {
struct mutex *qs_mutex; /* will be assigned to &pf->avail_q_mutex */
unsigned long *pf_map;
/* OS reserved IRQ details */
struct msix_entry *msix_entries;
- struct ice_res_tracker *irq_tracker;
+ struct ice_irq_tracker irq_tracker;
/* 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.
#include "ice_irq.h"
/**
+ * ice_init_irq_tracker - initialize interrupt tracker
+ * @pf: board private structure
+ * @max_vectors: maximum number of vectors that tracker can hold
+ */
+static void
+ice_init_irq_tracker(struct ice_pf *pf, unsigned int max_vectors)
+{
+ pf->irq_tracker.num_entries = max_vectors;
+ xa_init_flags(&pf->irq_tracker.entries, XA_FLAGS_ALLOC);
+}
+
+/**
+ * ice_deinit_irq_tracker - free xarray tracker
+ * @pf: board private structure
+ */
+static void ice_deinit_irq_tracker(struct ice_pf *pf)
+{
+ xa_destroy(&pf->irq_tracker.entries);
+}
+
+/**
+ * ice_free_irq_res - free a block of resources
+ * @pf: board private structure
+ * @index: starting index previously returned by ice_get_res
+ */
+static void ice_free_irq_res(struct ice_pf *pf, u16 index)
+{
+ struct ice_irq_entry *entry;
+
+ entry = xa_erase(&pf->irq_tracker.entries, index);
+ kfree(entry);
+}
+
+/**
+ * ice_get_irq_res - get an interrupt resource
+ * @pf: board private structure
+ *
+ * Allocate new irq entry in the free slot of the tracker. Since xarray
+ * is used, always allocate new entry at the lowest possible index. Set
+ * proper allocation limit for maximum tracker entries.
+ *
+ * Returns allocated irq entry or NULL on failure.
+ */
+static struct ice_irq_entry *ice_get_irq_res(struct ice_pf *pf)
+{
+ struct xa_limit limit = { .max = pf->irq_tracker.num_entries,
+ .min = 0 };
+ struct ice_irq_entry *entry;
+ unsigned int index;
+ int ret;
+
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry)
+ return NULL;
+
+ ret = xa_alloc(&pf->irq_tracker.entries, &index, entry, limit,
+ GFP_KERNEL);
+
+ if (ret) {
+ kfree(entry);
+ entry = NULL;
+ } else {
+ entry->index = index;
+ }
+
+ return entry;
+}
+
+/**
* ice_reduce_msix_usage - Reduce usage of MSI-X vectors
* @pf: board private structure
* @v_remain: number of remaining MSI-X vectors to be distributed
void ice_clear_interrupt_scheme(struct ice_pf *pf)
{
pci_free_irq_vectors(pf->pdev);
-
- if (pf->irq_tracker) {
- devm_kfree(ice_pf_to_dev(pf), pf->irq_tracker);
- pf->irq_tracker = NULL;
- }
+ ice_deinit_irq_tracker(pf);
}
/**
if (vectors < 0)
return vectors;
- /* set up vector assignment tracking */
- pf->irq_tracker = devm_kzalloc(ice_pf_to_dev(pf),
- struct_size(pf->irq_tracker, list,
- vectors),
- GFP_KERNEL);
- if (!pf->irq_tracker) {
- pci_free_irq_vectors(pf->pdev);
- return -ENOMEM;
- }
-
- /* populate SW interrupts pool with number of OS granted IRQs. */
- pf->irq_tracker->num_entries = (u16)vectors;
- pf->irq_tracker->end = pf->irq_tracker->num_entries;
+ ice_init_irq_tracker(pf, vectors);
return 0;
}
struct msi_map ice_alloc_irq(struct ice_pf *pf)
{
struct msi_map map = { .index = -ENOENT };
- int entry;
+ struct ice_irq_entry *entry;
- entry = ice_get_res(pf, pf->irq_tracker);
- if (entry < 0)
+ entry = ice_get_irq_res(pf);
+ if (!entry)
return map;
- map.index = entry;
+ map.index = entry->index;
map.virq = pci_irq_vector(pf->pdev, map.index);
return map;
* @pf: board private structure
* @map: map with interrupt details
*
- * Remove allocated interrupt from the interrupt tracker
+ * Remove allocated interrupt from the interrupt tracker.
*/
void ice_free_irq(struct ice_pf *pf, struct msi_map map)
{
- ice_free_res(pf->irq_tracker, map.index);
+ ice_free_irq_res(pf, map.index);
}
}
/**
- * ice_free_res - free a block of resources
- * @res: pointer to the resource
- * @index: starting index previously returned by ice_get_res
- *
- * Returns number of resources freed
- */
-int ice_free_res(struct ice_res_tracker *res, u16 index)
-{
- if (!res || index >= res->end)
- return -EINVAL;
-
- res->list[index] = 0;
-
- return 0;
-}
-
-/**
- * ice_get_res - get a resource from the tracker
- * @pf: board private structure
- * @res: pointer to the resource
- *
- * Returns the item index, or negative for error
- */
-int
-ice_get_res(struct ice_pf *pf, struct ice_res_tracker *res)
-{
- u16 i;
-
- if (!res || !pf)
- return -EINVAL;
-
- /* skip already allocated entries */
- for (i = 0; i < res->end; i++)
- if (!(res->list[i] & ICE_RES_VALID_BIT))
- break;
-
- if (i < res->end) {
- res->list[i] = ICE_RES_VALID_BIT;
- return i;
- } else {
- return -ENOMEM;
- }
-}
-
-/**
* ice_vsi_clear_rings - Deallocates the Tx and Rx rings for VSI
* @vsi: the VSI having rings deallocated
*/
projects / platform / kernel / linux-starfive.git / commitdiff