diff options
Diffstat (limited to 'drivers/net/ethernet/microsoft/mana/gdma_main.c')
| -rw-r--r-- | drivers/net/ethernet/microsoft/mana/gdma_main.c | 76 |
1 files changed, 36 insertions, 40 deletions
diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index 6367de0c2c2e..a6863011d682 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c @@ -414,8 +414,12 @@ static void mana_gd_process_eq_events(void *arg) old_bits = (eq->head / num_eqe - 1) & GDMA_EQE_OWNER_MASK; /* No more entries */ - if (owner_bits == old_bits) + if (owner_bits == old_bits) { + /* return here without ringing the doorbell */ + if (i == 0) + return; break; + } new_bits = (eq->head / num_eqe) & GDMA_EQE_OWNER_MASK; if (owner_bits != new_bits) { @@ -445,42 +449,29 @@ static int mana_gd_register_irq(struct gdma_queue *queue, struct gdma_dev *gd = queue->gdma_dev; struct gdma_irq_context *gic; struct gdma_context *gc; - struct gdma_resource *r; unsigned int msi_index; unsigned long flags; struct device *dev; int err = 0; gc = gd->gdma_context; - r = &gc->msix_resource; dev = gc->dev; + msi_index = spec->eq.msix_index; - spin_lock_irqsave(&r->lock, flags); - - msi_index = find_first_zero_bit(r->map, r->size); - if (msi_index >= r->size || msi_index >= gc->num_msix_usable) { + if (msi_index >= gc->num_msix_usable) { err = -ENOSPC; - } else { - bitmap_set(r->map, msi_index, 1); - queue->eq.msix_index = msi_index; - } - - spin_unlock_irqrestore(&r->lock, flags); - - if (err) { - dev_err(dev, "Register IRQ err:%d, msi:%u rsize:%u, nMSI:%u", - err, msi_index, r->size, gc->num_msix_usable); + dev_err(dev, "Register IRQ err:%d, msi:%u nMSI:%u", + err, msi_index, gc->num_msix_usable); return err; } + queue->eq.msix_index = msi_index; gic = &gc->irq_contexts[msi_index]; - WARN_ON(gic->handler || gic->arg); - - gic->arg = queue; - - gic->handler = mana_gd_process_eq_events; + spin_lock_irqsave(&gic->lock, flags); + list_add_rcu(&queue->entry, &gic->eq_list); + spin_unlock_irqrestore(&gic->lock, flags); return 0; } @@ -490,12 +481,11 @@ static void mana_gd_deregiser_irq(struct gdma_queue *queue) struct gdma_dev *gd = queue->gdma_dev; struct gdma_irq_context *gic; struct gdma_context *gc; - struct gdma_resource *r; unsigned int msix_index; unsigned long flags; + struct gdma_queue *eq; gc = gd->gdma_context; - r = &gc->msix_resource; /* At most num_online_cpus() + 1 interrupts are used. */ msix_index = queue->eq.msix_index; @@ -503,14 +493,17 @@ static void mana_gd_deregiser_irq(struct gdma_queue *queue) return; gic = &gc->irq_contexts[msix_index]; - gic->handler = NULL; - gic->arg = NULL; - - spin_lock_irqsave(&r->lock, flags); - bitmap_clear(r->map, msix_index, 1); - spin_unlock_irqrestore(&r->lock, flags); + spin_lock_irqsave(&gic->lock, flags); + list_for_each_entry_rcu(eq, &gic->eq_list, entry) { + if (queue == eq) { + list_del_rcu(&eq->entry); + break; + } + } + spin_unlock_irqrestore(&gic->lock, flags); queue->eq.msix_index = INVALID_PCI_MSIX_INDEX; + synchronize_rcu(); } int mana_gd_test_eq(struct gdma_context *gc, struct gdma_queue *eq) @@ -588,6 +581,7 @@ static int mana_gd_create_eq(struct gdma_dev *gd, int err; queue->eq.msix_index = INVALID_PCI_MSIX_INDEX; + queue->id = INVALID_QUEUE_ID; log2_num_entries = ilog2(queue->queue_size / GDMA_EQE_SIZE); @@ -819,6 +813,7 @@ free_q: kfree(queue); return err; } +EXPORT_SYMBOL_NS(mana_gd_create_mana_eq, NET_MANA); int mana_gd_create_mana_wq_cq(struct gdma_dev *gd, const struct gdma_queue_spec *spec, @@ -895,6 +890,7 @@ void mana_gd_destroy_queue(struct gdma_context *gc, struct gdma_queue *queue) mana_gd_free_memory(gmi); kfree(queue); } +EXPORT_SYMBOL_NS(mana_gd_destroy_queue, NET_MANA); int mana_gd_verify_vf_version(struct pci_dev *pdev) { @@ -1217,9 +1213,14 @@ int mana_gd_poll_cq(struct gdma_queue *cq, struct gdma_comp *comp, int num_cqe) static irqreturn_t mana_gd_intr(int irq, void *arg) { struct gdma_irq_context *gic = arg; + struct list_head *eq_list = &gic->eq_list; + struct gdma_queue *eq; - if (gic->handler) - gic->handler(gic->arg); + rcu_read_lock(); + list_for_each_entry_rcu(eq, eq_list, entry) { + gic->handler(eq); + } + rcu_read_unlock(); return IRQ_HANDLED; } @@ -1271,8 +1272,9 @@ static int mana_gd_setup_irqs(struct pci_dev *pdev) for (i = 0; i < nvec; i++) { gic = &gc->irq_contexts[i]; - gic->handler = NULL; - gic->arg = NULL; + gic->handler = mana_gd_process_eq_events; + INIT_LIST_HEAD(&gic->eq_list); + spin_lock_init(&gic->lock); if (!i) snprintf(gic->name, MANA_IRQ_NAME_SZ, "mana_hwc@pci:%s", @@ -1295,10 +1297,6 @@ static int mana_gd_setup_irqs(struct pci_dev *pdev) irq_set_affinity_and_hint(irq, cpumask_of(cpu)); } - err = mana_gd_alloc_res_map(nvec, &gc->msix_resource); - if (err) - goto free_irq; - gc->max_num_msix = nvec; gc->num_msix_usable = nvec; @@ -1329,8 +1327,6 @@ static void mana_gd_remove_irqs(struct pci_dev *pdev) if (gc->max_num_msix < 1) return; - mana_gd_free_res_map(&gc->msix_resource); - for (i = 0; i < gc->max_num_msix; i++) { irq = pci_irq_vector(pdev, i); if (irq < 0) |