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authorChristoph Hellwig <hch@lst.de>2019-06-17 15:19:53 +0300
committerMartin K. Petersen <martin.petersen@oracle.com>2019-07-17 06:01:49 +0300
commit7ad388d8e4c703980b7018b938cdeec58832d78d (patch)
tree26c50ab746ca4a8139179ee043beaa413ffe0558
parentf9b0530fa02e0c73f31a49ef743e8f44eb8e32cc (diff)
downloadlinux-7ad388d8e4c703980b7018b938cdeec58832d78d.tar.xz
scsi: core: add a host / host template field for the virt boundary
This allows drivers setting it up easily instead of branching out to block layer calls in slave_alloc, and ensures the upgraded max_segment_size setting gets picked up by the DMA layer. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Kashyap Desai < kashyap.desai@broadcom.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r--drivers/scsi/hosts.c3
-rw-r--r--drivers/scsi/scsi_lib.c3
-rw-r--r--include/scsi/scsi_host.h3
3 files changed, 8 insertions, 1 deletions
diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 96ed24841c33..f98509d717a0 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -462,6 +462,9 @@ struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *sht, int privsize)
else
shost->dma_boundary = 0xffffffff;
+ if (sht->virt_boundary_mask)
+ shost->virt_boundary_mask = sht->virt_boundary_mask;
+
device_initialize(&shost->shost_gendev);
dev_set_name(&shost->shost_gendev, "host%d", shost->host_no);
shost->shost_gendev.bus = &scsi_bus_type;
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 420e2354b36b..404e5e28ef62 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1791,7 +1791,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
dma_set_seg_boundary(dev, shost->dma_boundary);
blk_queue_max_segment_size(q, shost->max_segment_size);
- dma_set_max_seg_size(dev, shost->max_segment_size);
+ blk_queue_virt_boundary(q, shost->virt_boundary_mask);
+ dma_set_max_seg_size(dev, queue_max_segment_size(q));
/*
* Set a reasonable default alignment: The larger of 32-byte (dword),
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index a5fcdad4a03e..cc139dbd71e5 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -369,6 +369,8 @@ struct scsi_host_template {
*/
unsigned long dma_boundary;
+ unsigned long virt_boundary_mask;
+
/*
* This specifies "machine infinity" for host templates which don't
* limit the transfer size. Note this limit represents an absolute
@@ -587,6 +589,7 @@ struct Scsi_Host {
unsigned int max_sectors;
unsigned int max_segment_size;
unsigned long dma_boundary;
+ unsigned long virt_boundary_mask;
/*
* In scsi-mq mode, the number of hardware queues supported by the LLD.
*