git: b87f6330013f - main - nvme(4): Increase HMB alignment.

From: Ruslan Bukin <br_at_FreeBSD.org>
Date: Tue, 25 Nov 2025 08:46:09 UTC
The branch main has been updated by br:

URL: https://cgit.FreeBSD.org/src/commit/?id=b87f6330013f2d04ef83c453f95db5cd3247e6e1

commit b87f6330013f2d04ef83c453f95db5cd3247e6e1
Author:     Ruslan Bukin <br@FreeBSD.org>
AuthorDate: 2025-11-25 08:38:37 +0000
Commit:     Ruslan Bukin <br@FreeBSD.org>
CommitDate: 2025-11-25 08:38:37 +0000

    nvme(4): Increase HMB alignment.
    
    The NVME controller in Crucial P310 disk does not accept 16-byte aligned
    host memory buffer on Codasip Prime platform, but works fine on PAGE_SIZE
    aligned memory.
    
    Instead of adding a quirk, just increase alignment for everyone.
    
    Reviewed by:    jhb
    Discussed with: imp
    Sponsored by:   CHERI Research Centre
    Differential Revision:  https://reviews.freebsd.org/D53296
---
 sys/dev/nvme/nvme_ctrlr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/dev/nvme/nvme_ctrlr.c b/sys/dev/nvme/nvme_ctrlr.c
index 41542d24c107..1ad4735cbef8 100644
--- a/sys/dev/nvme/nvme_ctrlr.c
+++ b/sys/dev/nvme/nvme_ctrlr.c
@@ -907,7 +907,7 @@ again:
 
 	size = sizeof(struct nvme_hmb_desc) * ctrlr->hmb_nchunks;
 	err = bus_dma_tag_create(bus_get_dma_tag(ctrlr->dev),
-	    16, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
+	    PAGE_SIZE, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
 	    size, 1, size, 0, NULL, NULL, &ctrlr->hmb_desc_tag);
 	if (err != 0) {
 		nvme_printf(ctrlr, "HMB desc tag create failed %d\n", err);