summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/ibmvscsi
diff options
context:
space:
mode:
authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2008-07-25 19:44:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:03 -0700
commit8d8bb39b9eba32dd70e87fd5ad5c5dd4ba118e06 (patch)
tree64090a84f4c4466f9f30ff46c993e0cede379052 /drivers/scsi/ibmvscsi
parentc485b465a031b6f9b9a51300e0ee1f86efc6db87 (diff)
downloadop-kernel-dev-8d8bb39b9eba32dd70e87fd5ad5c5dd4ba118e06.zip
op-kernel-dev-8d8bb39b9eba32dd70e87fd5ad5c5dd4ba118e06.tar.gz
dma-mapping: add the device argument to dma_mapping_error()
Add per-device dma_mapping_ops support for CONFIG_X86_64 as POWER architecture does: This enables us to cleanly fix the Calgary IOMMU issue that some devices are not behind the IOMMU (http://lkml.org/lkml/2008/5/8/423). I think that per-device dma_mapping_ops support would be also helpful for KVM people to support PCI passthrough but Andi thinks that this makes it difficult to support the PCI passthrough (see the above thread). So I CC'ed this to KVM camp. Comments are appreciated. A pointer to dma_mapping_ops to struct dev_archdata is added. If the pointer is non NULL, DMA operations in asm/dma-mapping.h use it. If it's NULL, the system-wide dma_ops pointer is used as before. If it's useful for KVM people, I plan to implement a mechanism to register a hook called when a new pci (or dma capable) device is created (it works with hot plugging). It enables IOMMUs to set up an appropriate dma_mapping_ops per device. The major obstacle is that dma_mapping_error doesn't take a pointer to the device unlike other DMA operations. So x86 can't have dma_mapping_ops per device. Note all the POWER IOMMUs use the same dma_mapping_error function so this is not a problem for POWER but x86 IOMMUs use different dma_mapping_error functions. The first patch adds the device argument to dma_mapping_error. The patch is trivial but large since it touches lots of drivers and dma-mapping.h in all the architecture. This patch: dma_mapping_error() doesn't take a pointer to the device unlike other DMA operations. So we can't have dma_mapping_ops per device. Note that POWER already has dma_mapping_ops per device but all the POWER IOMMUs use the same dma_mapping_error function. x86 IOMMUs use device argument. [akpm@linux-foundation.org: fix sge] [akpm@linux-foundation.org: fix svc_rdma] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix bnx2x] [akpm@linux-foundation.org: fix s2io] [akpm@linux-foundation.org: fix pasemi_mac] [akpm@linux-foundation.org: fix sdhci] [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix sparc] [akpm@linux-foundation.org: fix ibmvscsi] Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Cc: Muli Ben-Yehuda <muli@il.ibm.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Avi Kivity <avi@qumranet.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/scsi/ibmvscsi')
-rw-r--r--drivers/scsi/ibmvscsi/ibmvfc.c4
-rw-r--r--drivers/scsi/ibmvscsi/ibmvscsi.c4
-rw-r--r--drivers/scsi/ibmvscsi/ibmvstgt.c2
-rw-r--r--drivers/scsi/ibmvscsi/rpa_vscsi.c2
4 files changed, 6 insertions, 6 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index c4a7c06..61f8fde 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -3525,7 +3525,7 @@ static int ibmvfc_init_crq(struct ibmvfc_host *vhost)
crq->msg_token = dma_map_single(dev, crq->msgs,
PAGE_SIZE, DMA_BIDIRECTIONAL);
- if (dma_mapping_error(crq->msg_token))
+ if (dma_mapping_error(dev, crq->msg_token))
goto map_failed;
retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
@@ -3618,7 +3618,7 @@ static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
async_q->size * sizeof(*async_q->msgs),
DMA_BIDIRECTIONAL);
- if (dma_mapping_error(async_q->msg_token)) {
+ if (dma_mapping_error(dev, async_q->msg_token)) {
dev_err(dev, "Failed to map async queue\n");
goto free_async_crq;
}
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c
index 20000ec..6b24b9c 100644
--- a/drivers/scsi/ibmvscsi/ibmvscsi.c
+++ b/drivers/scsi/ibmvscsi/ibmvscsi.c
@@ -859,7 +859,7 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata)
sizeof(hostdata->madapter_info),
DMA_BIDIRECTIONAL);
- if (dma_mapping_error(req->buffer)) {
+ if (dma_mapping_error(hostdata->dev, req->buffer)) {
if (!firmware_has_feature(FW_FEATURE_CMO))
dev_err(hostdata->dev,
"Unable to map request_buffer for "
@@ -1407,7 +1407,7 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata,
length,
DMA_BIDIRECTIONAL);
- if (dma_mapping_error(host_config->buffer)) {
+ if (dma_mapping_error(hostdata->dev, host_config->buffer)) {
if (!firmware_has_feature(FW_FEATURE_CMO))
dev_err(hostdata->dev,
"dma_mapping error getting host config\n");
diff --git a/drivers/scsi/ibmvscsi/ibmvstgt.c b/drivers/scsi/ibmvscsi/ibmvstgt.c
index 3b9514c..2e13ec0 100644
--- a/drivers/scsi/ibmvscsi/ibmvstgt.c
+++ b/drivers/scsi/ibmvscsi/ibmvstgt.c
@@ -564,7 +564,7 @@ static int crq_queue_create(struct crq_queue *queue, struct srp_target *target)
queue->size * sizeof(*queue->msgs),
DMA_BIDIRECTIONAL);
- if (dma_mapping_error(queue->msg_token))
+ if (dma_mapping_error(target->dev, queue->msg_token))
goto map_failed;
err = h_reg_crq(vport->dma_dev->unit_address, queue->msg_token,
diff --git a/drivers/scsi/ibmvscsi/rpa_vscsi.c b/drivers/scsi/ibmvscsi/rpa_vscsi.c
index 1821461..462a857 100644
--- a/drivers/scsi/ibmvscsi/rpa_vscsi.c
+++ b/drivers/scsi/ibmvscsi/rpa_vscsi.c
@@ -253,7 +253,7 @@ static int rpavscsi_init_crq_queue(struct crq_queue *queue,
queue->size * sizeof(*queue->msgs),
DMA_BIDIRECTIONAL);
- if (dma_mapping_error(queue->msg_token))
+ if (dma_mapping_error(hostdata->dev, queue->msg_token))
goto map_failed;
gather_partition_info();
OpenPOWER on IntegriCloud