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Commit 7ad388d8 authored Jun 17, 2019 by Christoph Hellwig Committed by Martin K. Petersen Jul 16, 2019

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 &lt; <kashyap.desai@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

parent f9b0530f

drivers/scsi/hosts.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;

drivers/scsi/scsi_lib.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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),

include/scsi/scsi_host.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -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.
		*