diff options
| author | Dave Jiang <dave.jiang@intel.com> | 2021-04-20 11:46:46 -0700 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2021-04-23 23:08:45 +0530 |
| commit | cf5f86a7d47df149857ba2fb72f9c6c9da46af2e (patch) | |
| tree | 5133b565ed10cab0cad8e8577f284b5fd08a4f9d /drivers/dma | |
| parent | 8241571fac9eeb7f3424ad343369eaa411919da3 (diff) | |
| download | linux-cf5f86a7d47df149857ba2fb72f9c6c9da46af2e.tar.gz linux-cf5f86a7d47df149857ba2fb72f9c6c9da46af2e.tar.xz | |
dmaengine: idxd: enable SVA feature for IOMMU
Enable IOMMU_DEV_FEAT_SVA before attempt to bind pasid. This is needed
according to iommu_sva_bind_device() comment. Currently Intel IOMMU code
does this before bind call. It really needs to be controlled by the driver.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/161894440621.3202472.17644507396206848134.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/idxd/init.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index ef58750c24cc..eb0b3a00a2d7 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -501,11 +501,18 @@ static int idxd_probe(struct idxd_device *idxd) dev_dbg(dev, "IDXD reset complete\n"); if (IS_ENABLED(CONFIG_INTEL_IDXD_SVM) && sva) { - rc = idxd_enable_system_pasid(idxd); - if (rc < 0) - dev_warn(dev, "Failed to enable PASID. No SVA support: %d\n", rc); - else - set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags); + rc = iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA); + if (rc == 0) { + rc = idxd_enable_system_pasid(idxd); + if (rc < 0) { + iommu_dev_disable_feature(dev, IOMMU_DEV_FEAT_SVA); + dev_warn(dev, "Failed to enable PASID. No SVA support: %d\n", rc); + } else { + set_bit(IDXD_FLAG_PASID_ENABLED, &idxd->flags); + } + } else { + dev_warn(dev, "Unable to turn on SVA feature.\n"); + } } else if (!sva) { dev_warn(dev, "User forced SVA off via module param.\n"); } @@ -539,6 +546,7 @@ static int idxd_probe(struct idxd_device *idxd) err: if (device_pasid_enabled(idxd)) idxd_disable_system_pasid(idxd); + iommu_dev_disable_feature(dev, IOMMU_DEV_FEAT_SVA); return rc; } @@ -699,6 +707,7 @@ static void idxd_remove(struct pci_dev *pdev) if (device_pasid_enabled(idxd)) idxd_disable_system_pasid(idxd); idxd_unregister_devices(idxd); + iommu_dev_disable_feature(&pdev->dev, IOMMU_DEV_FEAT_SVA); } static struct pci_driver idxd_pci_driver = { |