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[PATCH-for-5.2 v2 21/25] block/nvme: Change size and alignment of prp_li
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH-for-5.2 v2 21/25] block/nvme: Change size and alignment of prp_list_pages |
Date: |
Thu, 29 Oct 2020 10:33:02 +0100 |
From: Eric Auger <eric.auger@redhat.com>
In preparation of 64kB host page support, let's change the size
and alignment of the prp_list_pages so that the VFIO DMA MAP succeeds
with 64kB host page size. We align on the host page size.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
block/nvme.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/block/nvme.c b/block/nvme.c
index 4a8589d2d29..e807dd56dfe 100644
--- a/block/nvme.c
+++ b/block/nvme.c
@@ -215,6 +215,7 @@ static NVMeQueuePair *nvme_create_queue_pair(BDRVNVMeState
*s,
int i, r;
NVMeQueuePair *q;
uint64_t prp_list_iova;
+ size_t bytes;
q = g_try_new0(NVMeQueuePair, 1);
if (!q) {
@@ -222,19 +223,19 @@ static NVMeQueuePair
*nvme_create_queue_pair(BDRVNVMeState *s,
}
trace_nvme_create_queue_pair(idx, q, size, aio_context,
event_notifier_get_fd(s->irq_notifier));
- q->prp_list_pages = qemu_try_memalign(s->page_size,
- s->page_size * NVME_NUM_REQS);
+ bytes = QEMU_ALIGN_UP(s->page_size * NVME_NUM_REQS,
+ qemu_real_host_page_size);
+ q->prp_list_pages = qemu_try_memalign(qemu_real_host_page_size, bytes);
if (!q->prp_list_pages) {
goto fail;
}
- memset(q->prp_list_pages, 0, s->page_size * NVME_NUM_REQS);
+ memset(q->prp_list_pages, 0, bytes);
qemu_mutex_init(&q->lock);
q->s = s;
q->index = idx;
qemu_co_queue_init(&q->free_req_queue);
q->completion_bh = aio_bh_new(aio_context, nvme_process_completion_bh, q);
- r = qemu_vfio_dma_map(s->vfio, q->prp_list_pages,
- s->page_size * NVME_NUM_REQS,
+ r = qemu_vfio_dma_map(s->vfio, q->prp_list_pages, bytes,
false, &prp_list_iova);
if (r) {
goto fail;
--
2.26.2
- Re: [PATCH-for-5.2 v2 12/25] block/nvme: Introduce Completion Queue definitions, (continued)
- [PATCH-for-5.2 v2 13/25] block/nvme: Use definitions instead of magic values in add_io_queue(), Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 14/25] block/nvme: Correctly initialize Admin Queue Attributes, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 15/25] block/nvme: Simplify ADMIN queue access, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 17/25] block/nvme: Set request_alignment at initialization, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 16/25] block/nvme: Simplify nvme_cmd_sync(), Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 18/25] block/nvme: Correct minimum device page size, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 19/25] block/nvme: Change size and alignment of IDENTIFY response buffer, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 20/25] block/nvme: Change size and alignment of queue, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 21/25] block/nvme: Change size and alignment of prp_list_pages,
Philippe Mathieu-Daudé <=
- [PATCH-for-5.2 v2 22/25] block/nvme: Align iov's va and size on host page size, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 23/25] block/nvme: Fix use of write-only doorbells page on Aarch64 arch, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-5.2 v2 24/25] block/nvme: Fix nvme_submit_command() on big-endian host, Philippe Mathieu-Daudé, 2020/10/29
- [PATCH-for-6.0 v2 25/25] block/nvme: Simplify Completion Queue Command Identifier field use, Philippe Mathieu-Daudé, 2020/10/29