[PATCH v3 2/2] iommu: rockchip: Allocate tables from all available memory for IOMMU v2
From: Jonas Karlman <jonas@kwiboo.se>
Date: 2023-06-17 18:26:03
Also in:
linux-iommu, linux-rockchip, lkml
Subsystem:
arm/rockchip soc support, iommu subsystem, the rest · Maintainers:
Heiko Stuebner, Joerg Roedel, Will Deacon, Linus Torvalds
IOMMU v2 found in newer Rockchip SoCs, e.g. RK356x and RK3588, support placing directory and page tables in up to 40-bit addressable physical memory. Remove the use of GFP_DMA32 flag for IOMMU v2 now that the physical address to the directory table is correctly written to DTE_ADDR. Signed-off-by: Jonas Karlman <jonas@kwiboo.se> --- v3: - rework to only affect IOMMU v2 v2: - no change drivers/iommu/rockchip-iommu.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index ae42959bc490..8ff69fbf9f65 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c@@ -99,6 +99,7 @@ struct rk_iommu_ops { u32 (*mk_dtentries)(dma_addr_t pt_dma); u32 (*mk_ptentries)(phys_addr_t page, int prot); u64 dma_bit_mask; + gfp_t gfp_flags; }; struct rk_iommu {
@@ -727,7 +728,7 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain, if (rk_dte_is_pt_valid(dte)) goto done; - page_table = (u32 *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32); + page_table = (u32 *)get_zeroed_page(GFP_ATOMIC | rk_ops->gfp_flags); if (!page_table) return ERR_PTR(-ENOMEM);
@@ -1076,7 +1077,7 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type) * Each level1 (dt) and level2 (pt) table has 1024 4-byte entries. * Allocate one 4 KiB page for each table. */ - rk_domain->dt = (u32 *)get_zeroed_page(GFP_KERNEL | GFP_DMA32); + rk_domain->dt = (u32 *)get_zeroed_page(GFP_KERNEL | rk_ops->gfp_flags); if (!rk_domain->dt) goto err_free_domain;
@@ -1377,6 +1378,7 @@ static struct rk_iommu_ops iommu_data_ops_v1 = { .mk_dtentries = &rk_mk_dte, .mk_ptentries = &rk_mk_pte, .dma_bit_mask = DMA_BIT_MASK(32), + .gfp_flags = GFP_DMA32, }; static struct rk_iommu_ops iommu_data_ops_v2 = {
@@ -1384,6 +1386,7 @@ static struct rk_iommu_ops iommu_data_ops_v2 = { .mk_dtentries = &rk_mk_dte_v2, .mk_ptentries = &rk_mk_pte_v2, .dma_bit_mask = DMA_BIT_MASK(40), + .gfp_flags = 0, }; static const struct of_device_id rk_iommu_dt_ids[] = {
--
2.40.1
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