[PATCH v2 4/4] iommu: rockchip: Add support iommu v2
Benjamin Gaignard
benjamin.gaignard at collabora.com
Thu Apr 22 15:16:02 BST 2021
From: Simon Xue <xxm at rock-chips.com>
RK356x SoC got new IOMMU hardware block (version 2).
Add a compatible to distinguish it from the first version.
Signed-off-by: Simon Xue <xxm at rock-chips.com>
[Benjamin]
- port driver from kernel 4.19 to 5.12
- change functions prototype.
- squash all fixes in this commit.
Signed-off-by: Benjamin Gaignard <benjamin.gaignard at collabora.com>
---
drivers/iommu/rockchip-iommu.c | 422 +++++++++++++++++++++++++++++++--
1 file changed, 406 insertions(+), 16 deletions(-)
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index e5d86b7177de..0d345d0f44fc 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -19,6 +19,7 @@
#include <linux/iopoll.h>
#include <linux/list.h>
#include <linux/mm.h>
+#include <linux/module.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_iommu.h>
@@ -81,6 +82,30 @@
*/
#define RK_IOMMU_PGSIZE_BITMAP 0x007ff000
+#define DT_LO_MASK 0xfffff000
+#define DT_HI_MASK GENMASK_ULL(39, 32)
+#define DT_SHIFT 28
+
+#define DTE_BASE_HI_MASK GENMASK(11, 4)
+
+#define PAGE_DESC_LO_MASK 0xfffff000
+#define PAGE_DESC_HI1_LOWER 32
+#define PAGE_DESC_HI1_UPPER 35
+#define PAGE_DESC_HI2_LOWER 36
+#define PAGE_DESC_HI2_UPPER 39
+#define PAGE_DESC_HI_MASK1 GENMASK_ULL(PAGE_DESC_HI1_UPPER, PAGE_DESC_HI1_LOWER)
+#define PAGE_DESC_HI_MASK2 GENMASK_ULL(PAGE_DESC_HI2_UPPER, PAGE_DESC_HI2_LOWER)
+
+#define DTE_HI1_LOWER 8
+#define DTE_HI1_UPPER 11
+#define DTE_HI2_LOWER 4
+#define DTE_HI2_UPPER 7
+#define DTE_HI_MASK1 GENMASK(DTE_HI1_UPPER, DTE_HI1_LOWER)
+#define DTE_HI_MASK2 GENMASK(DTE_HI2_UPPER, DTE_HI2_LOWER)
+
+#define PAGE_DESC_HI_SHIFT1 (PAGE_DESC_HI1_LOWER - DTE_HI1_LOWER)
+#define PAGE_DESC_HI_SHIFT2 (PAGE_DESC_HI2_LOWER - DTE_HI2_LOWER)
+
struct rk_iommu_domain {
struct list_head iommus;
u32 *dt; /* page directory table */
@@ -91,6 +116,10 @@ struct rk_iommu_domain {
struct iommu_domain domain;
};
+struct rockchip_iommu_data {
+ u32 version;
+};
+
/* list of clocks required by IOMMU */
static const char * const rk_iommu_clocks[] = {
"aclk", "iface",
@@ -108,6 +137,7 @@ struct rk_iommu {
struct list_head node; /* entry in rk_iommu_domain.iommus */
struct iommu_domain *domain; /* domain to which iommu is attached */
struct iommu_group *group;
+ u32 version;
};
struct rk_iommudata {
@@ -174,11 +204,32 @@ static struct rk_iommu_domain *to_rk_domain(struct iommu_domain *dom)
#define RK_DTE_PT_ADDRESS_MASK 0xfffff000
#define RK_DTE_PT_VALID BIT(0)
+/*
+ * 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 0xfffffff0
+
static inline phys_addr_t rk_dte_pt_address(u32 dte)
{
return (phys_addr_t)dte & RK_DTE_PT_ADDRESS_MASK;
}
+static inline phys_addr_t rk_dte_pt_address_v2(u32 dte)
+{
+ u64 dte_v2 = dte;
+
+ dte_v2 = ((dte_v2 & DTE_HI_MASK2) << PAGE_DESC_HI_SHIFT2) |
+ ((dte_v2 & DTE_HI_MASK1) << PAGE_DESC_HI_SHIFT1) |
+ (dte_v2 & PAGE_DESC_LO_MASK);
+
+ return (phys_addr_t)dte_v2;
+}
+
static inline bool rk_dte_is_pt_valid(u32 dte)
{
return dte & RK_DTE_PT_VALID;
@@ -189,6 +240,15 @@ 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 & PAGE_DESC_LO_MASK) |
+ ((pt_dma & PAGE_DESC_HI_MASK1) >> PAGE_DESC_HI_SHIFT1) |
+ (pt_dma & PAGE_DESC_HI_MASK2) >> PAGE_DESC_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:
* +---------------------+---+-------+-+
@@ -215,11 +275,37 @@ static inline u32 rk_mk_dte(dma_addr_t pt_dma)
#define RK_PTE_PAGE_READABLE BIT(1)
#define RK_PTE_PAGE_VALID BIT(0)
+/*
+ * 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_ADDRESS_MASK_V2 0xfffffff0
+#define RK_PTE_PAGE_FLAGS_MASK_V2 0x0000000e
+#define RK_PTE_PAGE_READABLE_V2 BIT(2)
+#define RK_PTE_PAGE_WRITABLE_V2 BIT(1)
+
static inline phys_addr_t rk_pte_page_address(u32 pte)
{
return (phys_addr_t)pte & RK_PTE_PAGE_ADDRESS_MASK;
}
+static inline phys_addr_t rk_pte_page_address_v2(u32 pte)
+{
+ u64 pte_v2 = pte;
+
+ pte_v2 = ((pte_v2 & DTE_HI_MASK2) << PAGE_DESC_HI_SHIFT2) |
+ ((pte_v2 & DTE_HI_MASK1) << PAGE_DESC_HI_SHIFT1) |
+ (pte_v2 & PAGE_DESC_LO_MASK);
+
+ return (phys_addr_t)pte_v2;
+}
+
static inline bool rk_pte_is_page_valid(u32 pte)
{
return pte & RK_PTE_PAGE_VALID;
@@ -229,12 +315,26 @@ static inline bool rk_pte_is_page_valid(u32 pte)
static u32 rk_mk_pte(phys_addr_t page, int prot)
{
u32 flags = 0;
+
flags |= (prot & IOMMU_READ) ? RK_PTE_PAGE_READABLE : 0;
flags |= (prot & IOMMU_WRITE) ? RK_PTE_PAGE_WRITABLE : 0;
page &= RK_PTE_PAGE_ADDRESS_MASK;
return page | flags | RK_PTE_PAGE_VALID;
}
+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;
+ page = (page & PAGE_DESC_LO_MASK) |
+ ((page & PAGE_DESC_HI_MASK1) >> PAGE_DESC_HI_SHIFT1) |
+ (page & PAGE_DESC_HI_MASK2) >> PAGE_DESC_HI_SHIFT2;
+ page &= RK_PTE_PAGE_ADDRESS_MASK_V2;
+ return page | flags | RK_PTE_PAGE_VALID;
+}
+
static u32 rk_mk_pte_invalid(u32 pte)
{
return pte & ~RK_PTE_PAGE_VALID;
@@ -439,6 +539,7 @@ static int rk_iommu_force_reset(struct rk_iommu *iommu)
int ret, i;
u32 dte_addr;
bool val;
+ u32 address_mask;
if (iommu->reset_disabled)
return 0;
@@ -447,11 +548,19 @@ static int rk_iommu_force_reset(struct rk_iommu *iommu)
* Check if register DTE_ADDR is working by writing DTE_ADDR_DUMMY
* and verifying that upper 5 nybbles are read back.
*/
+
+ /*
+ * In v2: upper 7 nybbles are read back.
+ */
for (i = 0; i < iommu->num_mmu; i++) {
rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, DTE_ADDR_DUMMY);
+ if (iommu->version >= 0x2)
+ address_mask = RK_DTE_PT_ADDRESS_MASK_V2;
+ else
+ address_mask = RK_DTE_PT_ADDRESS_MASK;
dte_addr = rk_iommu_read(iommu->bases[i], RK_MMU_DTE_ADDR);
- if (dte_addr != (DTE_ADDR_DUMMY & RK_DTE_PT_ADDRESS_MASK)) {
+ if (dte_addr != (DTE_ADDR_DUMMY & address_mask)) {
dev_err(iommu->dev, "Error during raw reset. MMU_DTE_ADDR is not functioning\n");
return -EFAULT;
}
@@ -490,6 +599,10 @@ static void log_iova(struct rk_iommu *iommu, int index, dma_addr_t iova)
mmu_dte_addr = rk_iommu_read(base, RK_MMU_DTE_ADDR);
mmu_dte_addr_phys = (phys_addr_t)mmu_dte_addr;
+ if (iommu->version >= 0x2) {
+ mmu_dte_addr_phys = (mmu_dte_addr_phys & DT_LO_MASK) |
+ ((mmu_dte_addr_phys & DTE_BASE_HI_MASK) << DT_SHIFT);
+ }
dte_addr_phys = mmu_dte_addr_phys + (4 * dte_index);
dte_addr = phys_to_virt(dte_addr_phys);
@@ -498,14 +611,20 @@ static void log_iova(struct rk_iommu *iommu, int index, dma_addr_t iova)
if (!rk_dte_is_pt_valid(dte))
goto print_it;
- pte_addr_phys = rk_dte_pt_address(dte) + (pte_index * 4);
+ if (iommu->version >= 0x2)
+ pte_addr_phys = rk_dte_pt_address_v2(dte) + (pte_index * 4);
+ else
+ pte_addr_phys = rk_dte_pt_address(dte) + (pte_index * 4);
pte_addr = phys_to_virt(pte_addr_phys);
pte = *pte_addr;
if (!rk_pte_is_page_valid(pte))
goto print_it;
- page_addr_phys = rk_pte_page_address(pte) + page_offset;
+ if (iommu->version >= 0x2)
+ page_addr_phys = rk_pte_page_address_v2(pte) + page_offset;
+ else
+ page_addr_phys = rk_pte_page_address(pte) + page_offset;
page_flags = pte & RK_PTE_PAGE_FLAGS_MASK;
print_it:
@@ -522,6 +641,7 @@ static irqreturn_t rk_iommu_irq(int irq, void *dev_id)
struct rk_iommu *iommu = dev_id;
u32 status;
u32 int_status;
+ u32 int_mask;
dma_addr_t iova;
irqreturn_t ret = IRQ_NONE;
int i, err;
@@ -566,7 +686,15 @@ static irqreturn_t rk_iommu_irq(int irq, void *dev_id)
dev_err(iommu->dev, "Page fault while iommu not attached to domain?\n");
rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE);
- rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_PAGE_FAULT_DONE);
+
+ /*
+ * Master may clear the int_mask to prevent iommu
+ * re-enter interrupt when mapping. So we postpone
+ * sending PAGE_FAULT_DONE command to mapping finished.
+ */
+ int_mask = rk_iommu_read(iommu->bases[i], RK_MMU_INT_MASK);
+ if (int_mask != 0x0)
+ rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_PAGE_FAULT_DONE);
}
if (int_status & RK_MMU_IRQ_BUS_ERROR)
@@ -614,6 +742,34 @@ static phys_addr_t rk_iommu_iova_to_phys(struct iommu_domain *domain,
return phys;
}
+static phys_addr_t rk_iommu_iova_to_phys_v2(struct iommu_domain *domain,
+ dma_addr_t iova)
+{
+ struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
+ unsigned long flags;
+ phys_addr_t pt_phys, phys = 0;
+ u32 dte, pte;
+ u32 *page_table;
+
+ spin_lock_irqsave(&rk_domain->dt_lock, flags);
+
+ dte = rk_domain->dt[rk_iova_dte_index(iova)];
+ if (!rk_dte_is_pt_valid(dte))
+ goto out;
+
+ pt_phys = rk_dte_pt_address_v2(dte);
+ page_table = (u32 *)phys_to_virt(pt_phys);
+ pte = page_table[rk_iova_pte_index(iova)];
+ if (!rk_pte_is_page_valid(pte))
+ goto out;
+
+ phys = rk_pte_page_address_v2(pte) + rk_iova_page_offset(iova);
+out:
+ spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
+
+ return phys;
+}
+
static void rk_iommu_zap_iova(struct rk_iommu_domain *rk_domain,
dma_addr_t iova, size_t size)
{
@@ -690,6 +846,44 @@ static u32 *rk_dte_get_page_table(struct rk_iommu_domain *rk_domain,
return (u32 *)phys_to_virt(pt_phys);
}
+static u32 *rk_dte_get_page_table_v2(struct rk_iommu_domain *rk_domain,
+ dma_addr_t iova)
+{
+ u32 *page_table, *dte_addr;
+ u32 dte_index, dte;
+ phys_addr_t pt_phys;
+ dma_addr_t pt_dma;
+
+ assert_spin_locked(&rk_domain->dt_lock);
+
+ dte_index = rk_iova_dte_index(iova);
+ dte_addr = &rk_domain->dt[dte_index];
+ dte = *dte_addr;
+ if (rk_dte_is_pt_valid(dte))
+ goto done;
+
+ page_table = (u32 *)get_zeroed_page(GFP_ATOMIC | GFP_DMA32);
+ if (!page_table)
+ return ERR_PTR(-ENOMEM);
+
+ pt_dma = dma_map_single(dma_dev, page_table, SPAGE_SIZE, DMA_TO_DEVICE);
+ if (dma_mapping_error(dma_dev, pt_dma)) {
+ dev_err(dma_dev, "DMA mapping error while allocating page table\n");
+ free_page((unsigned long)page_table);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ dte = rk_mk_dte_v2(pt_dma);
+ *dte_addr = dte;
+
+ rk_table_flush(rk_domain, pt_dma, NUM_PT_ENTRIES);
+ rk_table_flush(rk_domain,
+ rk_domain->dt_dma + dte_index * sizeof(u32), 1);
+done:
+ pt_phys = rk_dte_pt_address_v2(dte);
+ return (u32 *)phys_to_virt(pt_phys);
+}
+
static size_t rk_iommu_unmap_iova(struct rk_iommu_domain *rk_domain,
u32 *pte_addr, dma_addr_t pte_dma,
size_t size)
@@ -757,6 +951,45 @@ static int rk_iommu_map_iova(struct rk_iommu_domain *rk_domain, u32 *pte_addr,
return -EADDRINUSE;
}
+static int rk_iommu_map_iova_v2(struct rk_iommu_domain *rk_domain, u32 *pte_addr,
+ dma_addr_t pte_dma, dma_addr_t iova,
+ phys_addr_t paddr, size_t size, int prot)
+{
+ unsigned int pte_count;
+ unsigned int pte_total = size / SPAGE_SIZE;
+ phys_addr_t page_phys;
+
+ assert_spin_locked(&rk_domain->dt_lock);
+
+ for (pte_count = 0; pte_count < pte_total; pte_count++) {
+ u32 pte = pte_addr[pte_count];
+
+ if (rk_pte_is_page_valid(pte))
+ goto unwind;
+
+ pte_addr[pte_count] = rk_mk_pte_v2(paddr, prot);
+
+ paddr += SPAGE_SIZE;
+ }
+
+ rk_table_flush(rk_domain, pte_dma, pte_total);
+
+ rk_iommu_zap_iova_first_last(rk_domain, iova, size);
+
+ return 0;
+unwind:
+ /* Unmap the range of iovas that we just mapped */
+ rk_iommu_unmap_iova(rk_domain, pte_addr, pte_dma,
+ pte_count * SPAGE_SIZE);
+
+ iova += pte_count * SPAGE_SIZE;
+ page_phys = rk_pte_page_address_v2(pte_addr[pte_count]);
+ pr_err("iova: %pad already mapped to %pa cannot remap to phys: %pa prot: %#x\n",
+ &iova, &page_phys, &paddr, prot);
+
+ return -EADDRINUSE;
+}
+
static int rk_iommu_map(struct iommu_domain *domain, unsigned long _iova,
phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
{
@@ -764,7 +997,7 @@ static int rk_iommu_map(struct iommu_domain *domain, unsigned long _iova,
unsigned long flags;
dma_addr_t pte_dma, iova = (dma_addr_t)_iova;
u32 *page_table, *pte_addr;
- u32 dte_index, pte_index;
+ u32 dte, pte_index;
int ret;
spin_lock_irqsave(&rk_domain->dt_lock, flags);
@@ -782,10 +1015,10 @@ static int rk_iommu_map(struct iommu_domain *domain, unsigned long _iova,
return PTR_ERR(page_table);
}
- dte_index = rk_domain->dt[rk_iova_dte_index(iova)];
+ dte = rk_domain->dt[rk_iova_dte_index(iova)];
pte_index = rk_iova_pte_index(iova);
pte_addr = &page_table[pte_index];
- pte_dma = rk_dte_pt_address(dte_index) + pte_index * sizeof(u32);
+ pte_dma = rk_dte_pt_address(dte) + pte_index * sizeof(u32);
ret = rk_iommu_map_iova(rk_domain, pte_addr, pte_dma, iova,
paddr, size, prot);
@@ -794,6 +1027,43 @@ static int rk_iommu_map(struct iommu_domain *domain, unsigned long _iova,
return ret;
}
+static int rk_iommu_map_v2(struct iommu_domain *domain, unsigned long _iova,
+ phys_addr_t paddr, size_t size, int prot, gfp_t gfp)
+{
+ struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
+ unsigned long flags;
+ dma_addr_t pte_dma, iova = (dma_addr_t)_iova;
+ u32 *page_table, *pte_addr;
+ u32 dte, pte_index;
+ int ret;
+
+ spin_lock_irqsave(&rk_domain->dt_lock, flags);
+
+ /*
+ * pgsize_bitmap specifies iova sizes that fit in one page table
+ * (1024 4-KiB pages = 4 MiB).
+ * So, size will always be 4096 <= size <= 4194304.
+ * Since iommu_map() guarantees that both iova and size will be
+ * aligned, we will always only be mapping from a single dte here.
+ */
+ page_table = rk_dte_get_page_table_v2(rk_domain, iova);
+ if (IS_ERR(page_table)) {
+ spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
+ return PTR_ERR(page_table);
+ }
+
+ dte = rk_domain->dt[rk_iova_dte_index(iova)];
+ pte_index = rk_iova_pte_index(iova);
+ pte_addr = &page_table[pte_index];
+ pte_dma = rk_dte_pt_address_v2(dte) + pte_index * sizeof(u32);
+ ret = rk_iommu_map_iova_v2(rk_domain, pte_addr, pte_dma, iova,
+ paddr, size, prot);
+
+ spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
+
+ return ret;
+}
+
static size_t rk_iommu_unmap(struct iommu_domain *domain, unsigned long _iova,
size_t size, struct iommu_iotlb_gather *gather)
{
@@ -834,6 +1104,46 @@ static size_t rk_iommu_unmap(struct iommu_domain *domain, unsigned long _iova,
return unmap_size;
}
+static size_t rk_iommu_unmap_v2(struct iommu_domain *domain, unsigned long _iova,
+ size_t size, struct iommu_iotlb_gather *gather)
+{
+ struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
+ unsigned long flags;
+ dma_addr_t pte_dma, iova = (dma_addr_t)_iova;
+ phys_addr_t pt_phys;
+ u32 dte;
+ u32 *pte_addr;
+ size_t unmap_size;
+
+ spin_lock_irqsave(&rk_domain->dt_lock, flags);
+
+ /*
+ * pgsize_bitmap specifies iova sizes that fit in one page table
+ * (1024 4-KiB pages = 4 MiB).
+ * So, size will always be 4096 <= size <= 4194304.
+ * Since iommu_unmap() guarantees that both iova and size will be
+ * aligned, we will always only be unmapping from a single dte here.
+ */
+ dte = rk_domain->dt[rk_iova_dte_index(iova)];
+ /* Just return 0 if iova is unmapped */
+ if (!rk_dte_is_pt_valid(dte)) {
+ spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
+ return 0;
+ }
+
+ pt_phys = rk_dte_pt_address_v2(dte);
+ pte_addr = (u32 *)phys_to_virt(pt_phys) + rk_iova_pte_index(iova);
+ pte_dma = pt_phys + rk_iova_pte_index(iova) * sizeof(u32);
+ unmap_size = rk_iommu_unmap_iova(rk_domain, pte_addr, pte_dma, size);
+
+ spin_unlock_irqrestore(&rk_domain->dt_lock, flags);
+
+ /* Shootdown iotlb entries for iova range that was just unmapped */
+ rk_iommu_zap_iova(rk_domain, iova, unmap_size);
+
+ return unmap_size;
+}
+
static struct rk_iommu *rk_iommu_from_dev(struct device *dev)
{
struct rk_iommudata *data = dev_iommu_priv_get(dev);
@@ -864,6 +1174,7 @@ static int rk_iommu_enable(struct rk_iommu *iommu)
struct iommu_domain *domain = iommu->domain;
struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
int ret, i;
+ u32 dt_v2;
ret = clk_bulk_enable(iommu->num_clocks, iommu->clocks);
if (ret)
@@ -878,8 +1189,14 @@ static int rk_iommu_enable(struct rk_iommu *iommu)
goto out_disable_stall;
for (i = 0; i < iommu->num_mmu; i++) {
- rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
- rk_domain->dt_dma);
+ if (iommu->version >= 0x2) {
+ dt_v2 = (rk_domain->dt_dma & DT_LO_MASK) |
+ ((rk_domain->dt_dma & DT_HI_MASK) >> DT_SHIFT);
+ rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR, dt_v2);
+ } else {
+ rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
+ rk_domain->dt_dma);
+ }
rk_iommu_base_command(iommu->bases[i], RK_MMU_CMD_ZAP_CACHE);
rk_iommu_write(iommu->bases[i], RK_MMU_INT_MASK, RK_MMU_IRQ_MASK);
}
@@ -1054,6 +1371,34 @@ static void rk_iommu_domain_free(struct iommu_domain *domain)
kfree(rk_domain);
}
+static void rk_iommu_domain_free_v2(struct iommu_domain *domain)
+{
+ struct rk_iommu_domain *rk_domain = to_rk_domain(domain);
+ int i;
+
+ WARN_ON(!list_empty(&rk_domain->iommus));
+
+ for (i = 0; i < NUM_DT_ENTRIES; i++) {
+ u32 dte = rk_domain->dt[i];
+
+ if (rk_dte_is_pt_valid(dte)) {
+ phys_addr_t pt_phys = rk_dte_pt_address_v2(dte);
+ u32 *page_table = phys_to_virt(pt_phys);
+
+ dma_unmap_single(dma_dev, pt_phys,
+ SPAGE_SIZE, DMA_TO_DEVICE);
+ free_page((unsigned long)page_table);
+ }
+ }
+ dma_unmap_single(dma_dev, rk_domain->dt_dma,
+ SPAGE_SIZE, DMA_TO_DEVICE);
+ free_page((unsigned long)rk_domain->dt);
+
+ if (domain->type == IOMMU_DOMAIN_DMA)
+ iommu_put_dma_cookie(&rk_domain->domain);
+ kfree(rk_domain);
+}
+
static struct iommu_device *rk_iommu_probe_device(struct device *dev)
{
struct rk_iommudata *data;
@@ -1122,6 +1467,40 @@ static const struct iommu_ops rk_iommu_ops = {
.of_xlate = rk_iommu_of_xlate,
};
+static const struct iommu_ops rk_iommu_ops_v2 = {
+ .domain_alloc = rk_iommu_domain_alloc,
+ .domain_free = rk_iommu_domain_free_v2,
+ .attach_dev = rk_iommu_attach_device,
+ .detach_dev = rk_iommu_detach_device,
+ .map = rk_iommu_map_v2,
+ .unmap = rk_iommu_unmap_v2,
+ .probe_device = rk_iommu_probe_device,
+ .release_device = rk_iommu_release_device,
+ .iova_to_phys = rk_iommu_iova_to_phys_v2,
+ .device_group = rk_iommu_device_group,
+ .pgsize_bitmap = RK_IOMMU_PGSIZE_BITMAP,
+ .of_xlate = rk_iommu_of_xlate,
+};
+
+static const struct rockchip_iommu_data iommu_data_v1 = {
+ .version = 0x1,
+};
+
+static const struct rockchip_iommu_data iommu_data_v2 = {
+ .version = 0x2,
+};
+
+static const struct of_device_id rk_iommu_dt_ids[] = {
+ { .compatible = "rockchip,iommu",
+ .data = &iommu_data_v1,
+ }, {
+ .compatible = "rockchip,iommu-v2",
+ .data = &iommu_data_v2,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rk_iommu_dt_ids);
+
static int rk_iommu_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1129,11 +1508,21 @@ static int rk_iommu_probe(struct platform_device *pdev)
struct resource *res;
int num_res = pdev->num_resources;
int err, i;
+ const struct of_device_id *match;
+ struct rockchip_iommu_data *data;
iommu = devm_kzalloc(dev, sizeof(*iommu), GFP_KERNEL);
if (!iommu)
return -ENOMEM;
+ match = of_match_device(rk_iommu_dt_ids, dev);
+ if (!match)
+ return -EINVAL;
+
+ data = (struct rockchip_iommu_data *)match->data;
+ iommu->version = data->version;
+ dev_info(dev, "version = %x\n", iommu->version);
+
platform_set_drvdata(pdev, iommu);
iommu->dev = dev;
iommu->num_mmu = 0;
@@ -1196,7 +1585,10 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (err)
goto err_put_group;
- iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
+ if (iommu->version >= 0x2)
+ iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops_v2);
+ else
+ iommu_device_set_ops(&iommu->iommu, &rk_iommu_ops);
iommu_device_set_fwnode(&iommu->iommu, &dev->of_node->fwnode);
err = iommu_device_register(&iommu->iommu);
@@ -1211,7 +1603,10 @@ static int rk_iommu_probe(struct platform_device *pdev)
if (!dma_dev)
dma_dev = &pdev->dev;
- bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
+ if (iommu->version >= 0x2)
+ bus_set_iommu(&platform_bus_type, &rk_iommu_ops_v2);
+ else
+ bus_set_iommu(&platform_bus_type, &rk_iommu_ops);
pm_runtime_enable(dev);
@@ -1280,11 +1675,6 @@ static const struct dev_pm_ops rk_iommu_pm_ops = {
pm_runtime_force_resume)
};
-static const struct of_device_id rk_iommu_dt_ids[] = {
- { .compatible = "rockchip,iommu" },
- { /* sentinel */ }
-};
-
static struct platform_driver rk_iommu_driver = {
.probe = rk_iommu_probe,
.shutdown = rk_iommu_shutdown,
--
2.25.1
More information about the linux-arm-kernel
mailing list