diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-04-02 16:33:09 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2021-04-07 11:14:43 +0200 |
| commit | d151c85c52a314c6ecb91ab35b3f696a6778b509 (patch) | |
| tree | c2795d16587b3bba918b6d1eebd8dfc92fc6312a /drivers/iommu/amd | |
| parent | 3e84f878b56b075b9a81de6e73da7b3dc88387d8 (diff) | |
iommu/amd: Remove the unused device errata code
The device errata mechism is entirely unused, so remove it.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210402143312.372386-2-hch@lst.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd')
| -rw-r--r-- | drivers/iommu/amd/amd_iommu_types.h | 1 | ||||
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 56 |
2 files changed, 3 insertions, 54 deletions
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index 6937e3674a16..94c1a7a9876d 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -693,7 +693,6 @@ struct iommu_dev_data { } ats; /* ATS state */ bool pri_tlp; /* PASID TLB required for PPR completions */ - u32 errata; /* Bitmap for errata to apply */ bool use_vapic; /* Enable device to use vapic mode */ bool defer_attach; diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 70814ab0b374..9b1a01602bb3 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -290,15 +290,6 @@ static bool pci_iommuv2_capable(struct pci_dev *pdev) return true; } -static bool pdev_pri_erratum(struct pci_dev *pdev, u32 erratum) -{ - struct iommu_dev_data *dev_data; - - dev_data = dev_iommu_priv_get(&pdev->dev); - - return dev_data->errata & (1 << erratum) ? true : false; -} - /* * This function checks if the driver got a valid device from the caller to * avoid dereferencing invalid pointers. @@ -1531,33 +1522,9 @@ static void pdev_iommuv2_disable(struct pci_dev *pdev) pci_disable_pasid(pdev); } -/* FIXME: Change generic reset-function to do the same */ -static int pri_reset_while_enabled(struct pci_dev *pdev) -{ - u16 control; - int pos; - - pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI); - if (!pos) - return -EINVAL; - - pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control); - control |= PCI_PRI_CTRL_RESET; - pci_write_config_word(pdev, pos + PCI_PRI_CTRL, control); - - return 0; -} - static int pdev_iommuv2_enable(struct pci_dev *pdev) { - bool reset_enable; - int reqs, ret; - - /* FIXME: Hardcode number of outstanding requests for now */ - reqs = 32; - if (pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_LIMIT_REQ_ONE)) - reqs = 1; - reset_enable = pdev_pri_erratum(pdev, AMD_PRI_DEV_ERRATUM_ENABLE_RESET); + int ret; /* Only allow access to user-accessible pages */ ret = pci_enable_pasid(pdev, 0); @@ -1570,16 +1537,11 @@ static int pdev_iommuv2_enable(struct pci_dev *pdev) goto out_err; /* Enable PRI */ - ret = pci_enable_pri(pdev, reqs); + /* FIXME: Hardcode number of outstanding requests for now */ + ret = pci_enable_pri(pdev, 32); if (ret) goto out_err; - if (reset_enable) { - ret = pri_reset_while_enabled(pdev); - if (ret) - goto out_err; - } - ret = pci_enable_ats(pdev, PAGE_SHIFT); if (ret) goto out_err; @@ -2594,18 +2556,6 @@ struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev) } EXPORT_SYMBOL(amd_iommu_get_v2_domain); -void amd_iommu_enable_device_erratum(struct pci_dev *pdev, u32 erratum) -{ - struct iommu_dev_data *dev_data; - - if (!amd_iommu_v2_supported()) - return; - - dev_data = dev_iommu_priv_get(&pdev->dev); - dev_data->errata |= (1 << erratum); -} -EXPORT_SYMBOL(amd_iommu_enable_device_erratum); - int amd_iommu_device_info(struct pci_dev *pdev, struct amd_iommu_device_info *info) { |