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author | Joerg Roedel <joerg.roedel@amd.com> | 2011-11-21 18:19:25 +0100 |
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committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-12-12 15:19:05 +0100 |
commit | c99afa25b67339b5fa7ef3767398878be9f60e1f (patch) | |
tree | 6743ac16764459cbdf519f0c83ca4d0c2d923dfb /drivers/iommu/amd_iommu.c | |
parent | b16137b11b4b4d4bb27b61bba7e05f5fda5968f4 (diff) | |
download | op-kernel-dev-c99afa25b67339b5fa7ef3767398878be9f60e1f.zip op-kernel-dev-c99afa25b67339b5fa7ef3767398878be9f60e1f.tar.gz |
iommu/amd: Implement function to send PPR completions
To send completions for PPR requests this patch adds a
function which can be used by the IOMMUv2 driver.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
-rw-r--r-- | drivers/iommu/amd_iommu.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 65a118c..9a7e64b 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -736,6 +736,22 @@ static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid, CMD_SET_TYPE(cmd, CMD_INV_IOTLB_PAGES); } +static void build_complete_ppr(struct iommu_cmd *cmd, u16 devid, int pasid, + int status, int tag, bool gn) +{ + memset(cmd, 0, sizeof(*cmd)); + + cmd->data[0] = devid; + if (gn) { + cmd->data[1] = pasid & PASID_MASK; + cmd->data[2] = CMD_INV_IOMMU_PAGES_GN_MASK; + } + cmd->data[3] = tag & 0x1ff; + cmd->data[3] |= (status & PPR_STATUS_MASK) << PPR_STATUS_SHIFT; + + CMD_SET_TYPE(cmd, CMD_COMPLETE_PPR); +} + static void build_inv_all(struct iommu_cmd *cmd) { memset(cmd, 0, sizeof(*cmd)); @@ -1950,6 +1966,23 @@ out_err: return ret; } +/* FIXME: Move this to PCI code */ +#define PCI_PRI_TLP_OFF (1 << 2) + +bool pci_pri_tlp_required(struct pci_dev *pdev) +{ + u16 control; + int pos; + + pos = pci_find_ext_capability(pdev, PCI_PRI_CAP); + if (!pos) + return false; + + pci_read_config_word(pdev, pos + PCI_PRI_CONTROL_OFF, &control); + + return (control & PCI_PRI_TLP_OFF) ? true : false; +} + /* * If a device is not yet associated with a domain, this function does * assigns it visible for the hardware @@ -1973,6 +2006,7 @@ static int attach_device(struct device *dev, dev_data->ats.enabled = true; dev_data->ats.qdep = pci_ats_queue_depth(pdev); + dev_data->pri_tlp = pci_pri_tlp_required(pdev); } else if (amd_iommu_iotlb_sup && pci_enable_ats(pdev, PAGE_SHIFT) == 0) { dev_data->ats.enabled = true; @@ -3412,3 +3446,20 @@ int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid) return ret; } EXPORT_SYMBOL(amd_iommu_domain_clear_gcr3); + +int amd_iommu_complete_ppr(struct pci_dev *pdev, int pasid, + int status, int tag) +{ + struct iommu_dev_data *dev_data; + struct amd_iommu *iommu; + struct iommu_cmd cmd; + + dev_data = get_dev_data(&pdev->dev); + iommu = amd_iommu_rlookup_table[dev_data->devid]; + + build_complete_ppr(&cmd, dev_data->devid, pasid, status, + tag, dev_data->pri_tlp); + + return iommu_queue_command(iommu, &cmd); +} +EXPORT_SYMBOL(amd_iommu_complete_ppr); |