@@ -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;
@@ -1775,7 +1775,8 @@ 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),
@@ -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.
*
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> --- drivers/scsi/hosts.c | 3 +++ drivers/scsi/scsi_lib.c | 3 ++- include/scsi/scsi_host.h | 3 +++ 3 files changed, 8 insertions(+), 1 deletion(-)