TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iommu/amd: Define per-IOMMU iopf_queue

Browse Source 
AMD IOMMU hardware supports PCI Peripheral Paging Request (PPR) using
a PPR log, which is a circular buffer containing requests from downstream
end-point devices.

There is one PPR log per IOMMU instance. Therefore, allocate an iopf_queue
per IOMMU instance during driver initialization, and free the queue during
driver deinitialization.

Also rename enable_iommus_v2() -> enable_iommus_ppr() to reflect its
usage. And add amd_iommu_gt_ppr_supported() check before enabling PPR
log.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Co-developed-by: Vasant Hegde <vasant.hegde@amd.com>
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20240418103400.6229-10-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Suravee Suthikulpanit
2024-04-18 10:33:54 +00:00
committed by Joerg Roedel
parent 25efbb0558
commit 61928bab9d
4 changed files with 55 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/iommu/amd/init.c
+16 -2
View File
@@ -1639,6 +1639,7 @@ static void __init free_iommu_one(struct amd_iommu *iommu)
amd_iommu_free_ppr_log(iommu);
free_ga_log(iommu);
iommu_unmap_mmio_space(iommu);
amd_iommu_iopf_uninit(iommu);
}
static void __init free_iommu_all(void)
@@ -2108,6 +2109,16 @@ static int __init iommu_init_pci(struct amd_iommu *iommu)
if (ret)
return ret;
/*
* Allocate per IOMMU IOPF queue here so that in attach device path,
* PRI capable device can be added to IOPF queue
*/
if (amd_iommu_gt_ppr_supported()) {
ret = amd_iommu_iopf_init(iommu);
if (ret)
return ret;
}
iommu_device_register(&iommu->iommu, &amd_iommu_ops, NULL);
return pci_enable_device(iommu->dev);
@@ -2793,10 +2804,13 @@ static void early_enable_iommus(void)
}
}
static void enable_iommus_v2(void)
static void enable_iommus_ppr(void)
{
struct amd_iommu *iommu;
if (!amd_iommu_gt_ppr_supported())
return;
for_each_iommu(iommu)
amd_iommu_enable_ppr_log(iommu);
}
@@ -3134,7 +3148,7 @@ static int amd_iommu_enable_interrupts(void)
* PPR and GA log interrupt for all IOMMUs.
*/
enable_iommus_vapic();
enable_iommus_v2();
enable_iommus_ppr();
out:
return ret;