From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: [PATCH 1/8] scsi: add a host / host template field for the virt boundary Date: Mon, 17 Jun 2019 14:19:53 +0200 Message-ID: <20190617122000.22181-2-hch@lst.de> References: <20190617122000.22181-1-hch@lst.de> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20190617122000.22181-1-hch@lst.de> Sender: linux-kernel-owner@vger.kernel.org To: "Martin K . Petersen" Cc: Sagi Grimberg , Max Gurtovoy , Bart Van Assche , linux-rdma@vger.kernel.org, linux-scsi@vger.kernel.org, megaraidlinux.pdl@broadcom.com, MPT-FusionLinux.pdl@broadcom.com, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-rdma@vger.kernel.org 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 --- drivers/scsi/hosts.c | 3 +++ drivers/scsi/scsi_lib.c | 3 ++- include/scsi/scsi_host.h | 3 +++ 3 files changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c index ff0d8c6a8d0c..55522b7162d3 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 65d0a10c76ad..d333bb6b1c59 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -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), 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. * -- 2.20.1