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Merge branch 'iommu/allwinner/sun50i' into iommu/next

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* iommu/allwinner/sun50i:
  iommu: sun50i: Add H616 compatible string
  dt-bindings: iommu: add new compatible strings
  iommu: sun50i: allocate page tables from below 4 GiB
  iommu: sun50i: clear bypass register
This commit is contained in:
Will Deacon 2024-07-12 16:53:20 +01:00
commit 91b3a24a22
2 changed files with 19 additions and 3 deletions
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7
Documentation/devicetree/bindings/iommu/allwinner,sun50i-h6-iommu.yaml
View File

@ -17,7 +17,12 @@ properties:
The content of the cell is the master ID.
compatible:
const: allwinner,sun50i-h6-iommu
oneOf:
- const: allwinner,sun50i-h6-iommu
- const: allwinner,sun50i-h616-iommu
- items:
- const: allwinner,sun55i-a523-iommu
- const: allwinner,sun50i-h616-iommu
reg:
maxItems: 1

15
drivers/iommu/sun50i-iommu.c
View File

@ -452,6 +452,7 @@ static int sun50i_iommu_enable(struct sun50i_iommu *iommu)
IOMMU_TLB_PREFETCH_MASTER_ENABLE(3) |
IOMMU_TLB_PREFETCH_MASTER_ENABLE(4) |
IOMMU_TLB_PREFETCH_MASTER_ENABLE(5));
iommu_write(iommu, IOMMU_BYPASS_REG, 0);
iommu_write(iommu, IOMMU_INT_ENABLE_REG, IOMMU_INT_MASK);
iommu_write(iommu, IOMMU_DM_AUT_CTRL_REG(SUN50I_IOMMU_ACI_NONE),
IOMMU_DM_AUT_CTRL_RD_UNAVAIL(SUN50I_IOMMU_ACI_NONE, 0) |
@ -601,6 +602,14 @@ static int sun50i_iommu_map(struct iommu_domain *domain, unsigned long iova,
u32 *page_table, *pte_addr;
int ret = 0;
/* the IOMMU can only handle 32-bit addresses, both input and output */
if ((uint64_t)paddr >> 32) {
ret = -EINVAL;
dev_warn_once(iommu->dev,
"attempt to map address beyond 4GB\n");
goto out;
}
page_table = sun50i_dte_get_page_table(sun50i_domain, iova, gfp);
if (IS_ERR(page_table)) {
ret = PTR_ERR(page_table);
@ -681,7 +690,8 @@ sun50i_iommu_domain_alloc_paging(struct device *dev)
if (!sun50i_domain)
return NULL;
sun50i_domain->dt = iommu_alloc_pages(GFP_KERNEL, get_order(DT_SIZE));
sun50i_domain->dt = iommu_alloc_pages(GFP_KERNEL | GFP_DMA32,
get_order(DT_SIZE));
if (!sun50i_domain->dt)
goto err_free_domain;
@ -996,7 +1006,7 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
iommu->pt_pool = kmem_cache_create(dev_name(&pdev->dev),
PT_SIZE, PT_SIZE,
SLAB_HWCACHE_ALIGN,
SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA32,
NULL);
if (!iommu->pt_pool)
return -ENOMEM;
@ -1057,6 +1067,7 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
static const struct of_device_id sun50i_iommu_dt[] = {
{ .compatible = "allwinner,sun50i-h6-iommu", },
{ .compatible = "allwinner,sun50i-h616-iommu", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, sun50i_iommu_dt);