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>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index e7d48a352beb..e82b37bbd6c3 100644
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c
@@ -328,7 +328,7 @@ static void ql_release_to_lrg_buf_free_list(struct ql3_adapter *qdev,
                                              qdev->lrg_buffer_len -
                                              QL_HEADER_SPACE,
                                              PCI_DMA_FROMDEVICE);
-                        err = pci_dma_mapping_error(map);
+                        err = pci_dma_mapping_error(qdev->pdev, map);
                         if(err) {
                                 printk(KERN_ERR "%s: PCI mapping failed with error: %d\n",
                                        qdev->ndev->name, err);
@@ -1919,7 +1919,7 @@ static int ql_populate_free_queue(struct ql3_adapter *qdev)
                                                      QL_HEADER_SPACE,
                                                      PCI_DMA_FROMDEVICE);
 
-                                err = pci_dma_mapping_error(map);
+                                err = pci_dma_mapping_error(qdev->pdev, map);
                                 if(err) {
                                         printk(KERN_ERR "%s: PCI mapping failed with error: %d\n",
                                                qdev->ndev->name, err);
@@ -2454,7 +2454,7 @@ static int ql_send_map(struct ql3_adapter *qdev,
          */
         map = pci_map_single(qdev->pdev, skb->data, len, PCI_DMA_TODEVICE);
 
-        err = pci_dma_mapping_error(map);
+        err = pci_dma_mapping_error(qdev->pdev, map);
         if(err) {
                 printk(KERN_ERR "%s: PCI mapping failed with error: %d\n",
                        qdev->ndev->name, err);
@@ -2487,7 +2487,7 @@ static int ql_send_map(struct ql3_adapter *qdev,
                                                      sizeof(struct oal),
                                                      PCI_DMA_TODEVICE);
 
-                                err = pci_dma_mapping_error(map);
+                                err = pci_dma_mapping_error(qdev->pdev, map);
                                 if(err) {
 
                                         printk(KERN_ERR "%s: PCI mapping outbound address list with error: %d\n",
@@ -2514,7 +2514,7 @@ static int ql_send_map(struct ql3_adapter *qdev,
                                          frag->page_offset, frag->size,
                                          PCI_DMA_TODEVICE);
 
-                        err = pci_dma_mapping_error(map);
+                        err = pci_dma_mapping_error(qdev->pdev, map);
                         if(err) {
                                 printk(KERN_ERR "%s: PCI mapping frags failed with error: %d\n",
                                        qdev->ndev->name, err);
@@ -2916,7 +2916,7 @@ static int ql_alloc_large_buffers(struct ql3_adapter *qdev)
                                              QL_HEADER_SPACE,
                                              PCI_DMA_FROMDEVICE);
 
-                        err = pci_dma_mapping_error(map);
+                        err = pci_dma_mapping_error(qdev->pdev, map);
                         if(err) {
                                 printk(KERN_ERR "%s: PCI mapping failed with error: %d\n",
                                        qdev->ndev->name, err);