From b111b3fcdecc7ce441fa6760e116c3c45b4b8133 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Fri, 21 Aug 2020 21:53:59 +0200 Subject: [PATCH] block/nvme: Use an array of EventNotifier MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit In preparation of using multiple IRQ (thus multiple eventfds) make BDRVNVMeState::irq_notifier an array (for now of a single element, the admin queue notifier). Reviewed-by: Stefan Hajnoczi Reviewed-by: Stefano Garzarella Signed-off-by: Philippe Mathieu-Daudé Message-Id: <20200821195359.1285345-16-philmd@redhat.com> Signed-off-by: Kevin Wolf --- block/nvme.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) diff --git a/block/nvme.c b/block/nvme.c index e3719d3bd1..24e6e7f086 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -106,6 +106,12 @@ QEMU_BUILD_BUG_ON(offsetof(NVMeRegs, doorbells) != 0x1000); #define INDEX_ADMIN 0 #define INDEX_IO(n) (1 + n) +/* This driver shares a single MSIX IRQ for the admin and I/O queues */ +enum { + MSIX_SHARED_IRQ_IDX = 0, + MSIX_IRQ_COUNT = 1 +}; + struct BDRVNVMeState { AioContext *aio_context; QEMUVFIOState *vfio; @@ -120,7 +126,7 @@ struct BDRVNVMeState { /* How many uint32_t elements does each doorbell entry take. */ size_t doorbell_scale; bool write_cache_supported; - EventNotifier irq_notifier; + EventNotifier irq_notifier[MSIX_IRQ_COUNT]; uint64_t nsze; /* Namespace size reported by identify command */ int nsid; /* The namespace id to read/write data. */ @@ -631,7 +637,8 @@ static bool nvme_poll_queues(BDRVNVMeState *s) static void nvme_handle_event(EventNotifier *n) { - BDRVNVMeState *s = container_of(n, BDRVNVMeState, irq_notifier); + BDRVNVMeState *s = container_of(n, BDRVNVMeState, + irq_notifier[MSIX_SHARED_IRQ_IDX]); trace_nvme_handle_event(s); event_notifier_test_and_clear(n); @@ -683,7 +690,8 @@ out_error: static bool nvme_poll_cb(void *opaque) { EventNotifier *e = opaque; - BDRVNVMeState *s = container_of(e, BDRVNVMeState, irq_notifier); + BDRVNVMeState *s = container_of(e, BDRVNVMeState, + irq_notifier[MSIX_SHARED_IRQ_IDX]); trace_nvme_poll_cb(s); return nvme_poll_queues(s); @@ -705,7 +713,7 @@ static int nvme_init(BlockDriverState *bs, const char *device, int namespace, s->device = g_strdup(device); s->nsid = namespace; s->aio_context = bdrv_get_aio_context(bs); - ret = event_notifier_init(&s->irq_notifier, 0); + ret = event_notifier_init(&s->irq_notifier[MSIX_SHARED_IRQ_IDX], 0); if (ret) { error_setg(errp, "Failed to init event notifier"); return ret; @@ -784,12 +792,13 @@ static int nvme_init(BlockDriverState *bs, const char *device, int namespace, } } - ret = qemu_vfio_pci_init_irq(s->vfio, &s->irq_notifier, + ret = qemu_vfio_pci_init_irq(s->vfio, s->irq_notifier, VFIO_PCI_MSIX_IRQ_INDEX, errp); if (ret) { goto out; } - aio_set_event_notifier(bdrv_get_aio_context(bs), &s->irq_notifier, + aio_set_event_notifier(bdrv_get_aio_context(bs), + &s->irq_notifier[MSIX_SHARED_IRQ_IDX], false, nvme_handle_event, nvme_poll_cb); nvme_identify(bs, namespace, &local_err); @@ -872,9 +881,10 @@ static void nvme_close(BlockDriverState *bs) nvme_free_queue_pair(s->queues[i]); } g_free(s->queues); - aio_set_event_notifier(bdrv_get_aio_context(bs), &s->irq_notifier, + aio_set_event_notifier(bdrv_get_aio_context(bs), + &s->irq_notifier[MSIX_SHARED_IRQ_IDX], false, NULL, NULL); - event_notifier_cleanup(&s->irq_notifier); + event_notifier_cleanup(&s->irq_notifier[MSIX_SHARED_IRQ_IDX]); qemu_vfio_pci_unmap_bar(s->vfio, 0, (void *)s->regs, 0, NVME_BAR_SIZE); qemu_vfio_close(s->vfio); @@ -1381,7 +1391,8 @@ static void nvme_detach_aio_context(BlockDriverState *bs) q->completion_bh = NULL; } - aio_set_event_notifier(bdrv_get_aio_context(bs), &s->irq_notifier, + aio_set_event_notifier(bdrv_get_aio_context(bs), + &s->irq_notifier[MSIX_SHARED_IRQ_IDX], false, NULL, NULL); } @@ -1391,7 +1402,7 @@ static void nvme_attach_aio_context(BlockDriverState *bs, BDRVNVMeState *s = bs->opaque; s->aio_context = new_context; - aio_set_event_notifier(new_context, &s->irq_notifier, + aio_set_event_notifier(new_context, &s->irq_notifier[MSIX_SHARED_IRQ_IDX], false, nvme_handle_event, nvme_poll_cb); for (int i = 0; i < s->nr_queues; i++) { -- 2.11.0