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authorAlexey Kardashevskiy <aik@ozlabs.ru>2015-06-05 09:35:08 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2015-06-11 08:14:57 +0300
commitb348aa65297659c310943221ac1d3f4b4491ea44 (patch)
tree7431859382dcf9ad05b4078ff21cbf8ca4d50492 /drivers/vfio
parentdecbda25728ddfbb28b77749d2545028e892ca99 (diff)
downloadlinux-b348aa65297659c310943221ac1d3f4b4491ea44.tar.xz
powerpc/spapr: vfio: Replace iommu_table with iommu_table_group
Modern IBM POWERPC systems support multiple (currently two) TCE tables per IOMMU group (a.k.a. PE). This adds a iommu_table_group container for TCE tables. Right now just one table is supported. This defines iommu_table_group struct which stores pointers to iommu_group and iommu_table(s). This replaces iommu_table with iommu_table_group where iommu_table was used to identify a group: - iommu_register_group(); - iommudata of generic iommu_group; This removes @data from iommu_table as it_table_group provides same access to pnv_ioda_pe. For IODA, instead of embedding iommu_table, the new iommu_table_group keeps pointers to those. The iommu_table structs are allocated dynamically. For P5IOC2, both iommu_table_group and iommu_table are embedded into PE struct. As there is no EEH and SRIOV support for P5IOC2, iommu_free_table() should not be called on iommu_table struct pointers so we can keep it embedded in pnv_phb::p5ioc2. For pSeries, this replaces multiple calls of kzalloc_node() with a new iommu_pseries_alloc_group() helper and stores the table group struct pointer into the pci_dn struct. For release, a iommu_table_free_group() helper is added. This moves iommu_table struct allocation from SR-IOV code to the generic DMA initialization code in pnv_pci_ioda_setup_dma_pe and pnv_pci_ioda2_setup_dma_pe as this is where DMA is actually initialized. This change is here because those lines had to be changed anyway. This should cause no behavioural change. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> [aw: for the vfio related changes] Acked-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/vfio')
-rw-r--r--drivers/vfio/vfio_iommu_spapr_tce.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/vfio/vfio_iommu_spapr_tce.c b/drivers/vfio/vfio_iommu_spapr_tce.c
index e65bc73cc8a8..c4bc345d64d7 100644
--- a/drivers/vfio/vfio_iommu_spapr_tce.c
+++ b/drivers/vfio/vfio_iommu_spapr_tce.c
@@ -190,10 +190,11 @@ static void tce_iommu_release(void *iommu_data)
{
struct tce_container *container = iommu_data;
- WARN_ON(container->tbl && !container->tbl->it_group);
+ WARN_ON(container->tbl && !container->tbl->it_table_group->group);
- if (container->tbl && container->tbl->it_group)
- tce_iommu_detach_group(iommu_data, container->tbl->it_group);
+ if (container->tbl && container->tbl->it_table_group->group)
+ tce_iommu_detach_group(iommu_data,
+ container->tbl->it_table_group->group);
tce_iommu_disable(container);
mutex_destroy(&container->lock);
@@ -345,7 +346,7 @@ static long tce_iommu_ioctl(void *iommu_data,
if (!tbl)
return -ENXIO;
- BUG_ON(!tbl->it_group);
+ BUG_ON(!tbl->it_table_group->group);
minsz = offsetofend(struct vfio_iommu_type1_dma_map, size);
@@ -433,11 +434,12 @@ static long tce_iommu_ioctl(void *iommu_data,
mutex_unlock(&container->lock);
return 0;
case VFIO_EEH_PE_OP:
- if (!container->tbl || !container->tbl->it_group)
+ if (!container->tbl || !container->tbl->it_table_group->group)
return -ENODEV;
- return vfio_spapr_iommu_eeh_ioctl(container->tbl->it_group,
- cmd, arg);
+ return vfio_spapr_iommu_eeh_ioctl(
+ container->tbl->it_table_group->group,
+ cmd, arg);
}
return -ENOTTY;
@@ -457,7 +459,8 @@ static int tce_iommu_attach_group(void *iommu_data,
iommu_group_id(iommu_group), iommu_group); */
if (container->tbl) {
pr_warn("tce_vfio: Only one group per IOMMU container is allowed, existing id=%d, attaching id=%d\n",
- iommu_group_id(container->tbl->it_group),
+ iommu_group_id(container->tbl->
+ it_table_group->group),
iommu_group_id(iommu_group));
ret = -EBUSY;
goto unlock_exit;
@@ -491,13 +494,13 @@ static void tce_iommu_detach_group(void *iommu_data,
if (tbl != container->tbl) {
pr_warn("tce_vfio: detaching group #%u, expected group is #%u\n",
iommu_group_id(iommu_group),
- iommu_group_id(tbl->it_group));
+ iommu_group_id(tbl->it_table_group->group));
goto unlock_exit;
}
if (container->enabled) {
pr_warn("tce_vfio: detaching group #%u from enabled container, forcing disable\n",
- iommu_group_id(tbl->it_group));
+ iommu_group_id(tbl->it_table_group->group));
tce_iommu_disable(container);
}