diff options
| author | Sam Protsenko <semen.protsenko@linaro.org> | 2022-07-14 19:55:50 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-07-15 11:30:45 +0300 |
| commit | 7fee5d6f41b4a3ceadf0f8ca48cc78c754d3515b (patch) | |
| tree | baf4cbfd52236c8d0b3d6860b2bcc047e92d3b07 /drivers/iommu | |
| parent | 0892c4986b6c9eae90ba56e7541bd020576abf69 (diff) | |
| download | linux-7fee5d6f41b4a3ceadf0f8ca48cc78c754d3515b.tar.xz | |
iommu/exynos: Enable default VM instance on SysMMU v7
In order to enable SysMMU v7 with VM register layout, at least the
default VM instance (n=0) must be enabled, in addition to enabling the
SysMMU itself. To do so, add corresponding write to MMU_CTRL_VM[0]
register, before writing to MMU_CTRL register.
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20220714165550.8884-7-semen.protsenko@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 0a773b6a525d..768594d107ad 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -135,6 +135,8 @@ static u32 lv2ent_offset(sysmmu_iova_t iova) #define CFG_SYSSEL (1 << 22) /* System MMU 3.2 only */ #define CFG_FLPDCACHE (1 << 20) /* System MMU 3.2+ only */ +#define CTRL_VM_ENABLE BIT(0) +#define CTRL_VM_FAULT_MODE_STALL BIT(3) #define CAPA0_CAPA1_EXIST BIT(11) #define CAPA1_VCR_ENABLED BIT(14) @@ -163,6 +165,7 @@ static u32 lv2ent_offset(sysmmu_iova_t iova) /* v7.x registers */ #define REG_V7_CAPA0 0x870 #define REG_V7_CAPA1 0x874 +#define REG_V7_CTRL_VM 0x8000 #define has_sysmmu(dev) (dev_iommu_priv_get(dev) != NULL) @@ -548,6 +551,18 @@ static void __sysmmu_init_config(struct sysmmu_drvdata *data) writel(cfg, data->sfrbase + REG_MMU_CFG); } +static void __sysmmu_enable_vid(struct sysmmu_drvdata *data) +{ + u32 ctrl; + + if (MMU_MAJ_VER(data->version) < 7 || !data->has_vcr) + return; + + ctrl = readl(data->sfrbase + REG_V7_CTRL_VM); + ctrl |= CTRL_VM_ENABLE | CTRL_VM_FAULT_MODE_STALL; + writel(ctrl, data->sfrbase + REG_V7_CTRL_VM); +} + static void __sysmmu_enable(struct sysmmu_drvdata *data) { unsigned long flags; @@ -558,6 +573,7 @@ static void __sysmmu_enable(struct sysmmu_drvdata *data) writel(CTRL_BLOCK, data->sfrbase + REG_MMU_CTRL); __sysmmu_init_config(data); __sysmmu_set_ptbase(data, data->pgtable); + __sysmmu_enable_vid(data); writel(CTRL_ENABLE, data->sfrbase + REG_MMU_CTRL); data->active = true; spin_unlock_irqrestore(&data->lock, flags); |