This second version of the hardware block has a different bits
mapping for page table entries.
Add the ops matching to this new mapping.
Define a new compatible to distinguish it from the first version.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
---
version 5:
- Use internal ops to support v2 hardware block
- Use GENMASK macro.
- Keep rk_dte_pt_address() and rk_dte_pt_address_v2() separated
because I believe that is more readable like this.
- Do not duplicate code.
drivers/iommu/rockchip-iommu.c | 78 ++++++++++++++++++++++++++++++++++
1 file changed, 78 insertions(+)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index e7b9bcf174b1..23253a2f269e 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -189,6 +189,33 @@ static inline phys_addr_t rk_dte_pt_address(u32 dte)
return (phys_addr_t)dte & RK_DTE_PT_ADDRESS_MASK;
}
+/*
+ * In v2:
+ * 31:12 - PT address bit 31:0
+ * 11: 8 - PT address bit 35:32
+ * 7: 4 - PT address bit 39:36
+ * 3: 1 - Reserved
+ * 0 - 1 if PT @ PT address is valid
+ */
+#define RK_DTE_PT_ADDRESS_MASK_V2 GENMASK_ULL(31, 4)
+#define DTE_HI_MASK1 GENMASK(11, 8)
+#define DTE_HI_MASK2 GENMASK(7, 4)
+#define DTE_HI_SHIFT1 24 /* shift bit 8 to bit 32 */
+#define DTE_HI_SHIFT2 32 /* shift bit 4 to bit 36 */
+#define PAGE_DESC_HI_MASK1 GENMASK_ULL(39, 36)
+#define PAGE_DESC_HI_MASK2 GENMASK_ULL(35, 32)
+
+static inline phys_addr_t rk_dte_pt_address_v2(u32 dte)
+{
+ u64 dte_v2 = dte;
+
+ dte_v2 = ((dte_v2 & DTE_HI_MASK2) << DTE_HI_SHIFT2) |
+ ((dte_v2 & DTE_HI_MASK1) << DTE_HI_SHIFT1) |
+ (dte_v2 & RK_DTE_PT_ADDRESS_MASK);
+
+ return (phys_addr_t)dte_v2;
+}
+
static inline bool rk_dte_is_pt_valid(u32 dte)
{
return dte & RK_DTE_PT_VALID;
@@ -199,6 +226,15 @@ static inline u32 rk_mk_dte(dma_addr_t pt_dma)
return (pt_dma & RK_DTE_PT_ADDRESS_MASK) | RK_DTE_PT_VALID;
}
+static inline u32 rk_mk_dte_v2(dma_addr_t pt_dma)
+{
+ pt_dma = (pt_dma & RK_DTE_PT_ADDRESS_MASK) |
+ ((pt_dma & PAGE_DESC_HI_MASK1) >> DTE_HI_SHIFT1) |
+ (pt_dma & PAGE_DESC_HI_MASK2) >> DTE_HI_SHIFT2;
+
+ return (pt_dma & RK_DTE_PT_ADDRESS_MASK_V2) | RK_DTE_PT_VALID;
+}
+
/*
* Each PTE has a Page address, some flags and a valid bit:
* +---------------------+---+-------+-+
@@ -240,6 +276,29 @@ static u32 rk_mk_pte(phys_addr_t page, int prot)
return page | flags | RK_PTE_PAGE_VALID;
}
+/*
+ * In v2:
+ * 31:12 - Page address bit 31:0
+ * 11:9 - Page address bit 34:32
+ * 8:4 - Page address bit 39:35
+ * 3 - Security
+ * 2 - Readable
+ * 1 - Writable
+ * 0 - 1 if Page @ Page address is valid
+ */
+#define RK_PTE_PAGE_READABLE_V2 BIT(2)
+#define RK_PTE_PAGE_WRITABLE_V2 BIT(1)
+
+static u32 rk_mk_pte_v2(phys_addr_t page, int prot)
+{
+ u32 flags = 0;
+
+ flags |= (prot & IOMMU_READ) ? RK_PTE_PAGE_READABLE_V2 : 0;
+ flags |= (prot & IOMMU_WRITE) ? RK_PTE_PAGE_WRITABLE_V2 : 0;
+
+ return rk_mk_dte_v2(page) | flags ;
+}
+
static u32 rk_mk_pte_invalid(u32 pte)
{
return pte & ~RK_PTE_PAGE_VALID;
@@ -480,6 +539,14 @@ static inline phys_addr_t rk_dte_addr_phys(phys_addr_t addr)
return addr;
}
+#define DT_HI_MASK GENMASK_ULL(39, 32)
+#define DT_SHIFT 28
+
+static inline phys_addr_t rk_dte_addr_phys_v2(phys_addr_t addr)
+{
+ return (addr & RK_DTE_PT_ADDRESS_MASK) | ((addr & DT_HI_MASK) << DT_SHIFT);
+}
+
static void log_iova(struct rk_iommu *iommu, int index, dma_addr_t iova)
{
void __iomem *base = iommu->bases[index];
@@ -1305,10 +1372,21 @@ static struct rk_iommu_ops iommu_data_ops_v1 = {
.pt_address_mask = RK_DTE_PT_ADDRESS_MASK,
};
+static struct rk_iommu_ops iommu_data_ops_v2 = {
+ .pt_address = &rk_dte_pt_address_v2,
+ .mk_dtentries = &rk_mk_dte_v2,
+ .mk_ptentries = &rk_mk_pte_v2,
+ .dte_addr_phys = &rk_dte_addr_phys_v2,
+ .pt_address_mask = RK_DTE_PT_ADDRESS_MASK_V2,
+};
+
static const struct of_device_id rk_iommu_dt_ids[] = {
{ .compatible = "rockchip,iommu",
.data = &iommu_data_ops_v1,
},
+ { .compatible = "rockchip,rk3568-iommu",
+ .data = &iommu_data_ops_v2,
+ },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rk_iommu_dt_ids);
--
2.25.1
