The later Tegra SoC(>= T124) has more registers for
MC_SMMU_TRANSLATION_ENABLE_*. Now those info is provided as platfrom
data. If those varies a lot on SoCs in the future, we can consider
putting them into DT later.
Signed-off-by: Hiroshi Doyu <hdoyu@xxxxxxxxxx>
---
.../bindings/iommu/nvidia,tegra30-smmu.txt | 4 +-
drivers/iommu/tegra-smmu.c | 68 ++++++++++++++--------
2 files changed, 47 insertions(+), 25 deletions(-)
diff --git a/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt b/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt
index fd53f54..71be0d2 100644
--- a/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt
+++ b/Documentation/devicetree/bindings/iommu/nvidia,tegra30-smmu.txt
@@ -1,8 +1,8 @@
NVIDIA Tegra 30 IOMMU H/W, SMMU (System Memory Management Unit)
Required properties in the IOMMU node:
-- compatible : "nvidia,tegra30-smmu"
-- reg : Should contain 3 register banks(address and length) for each
+- compatible : "nvidia,tegra124-smmu", "nvidia,tegra30-smmu"
+- reg : Can contain multiple register banks(address and length) for each
of the SMMU register blocks.
- interrupts : Should contain MC General interrupt.
- nvidia,#asids : # of ASIDs
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index a723a1b..b5737f9 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -32,6 +32,7 @@
#include <linux/iommu.h>
#include <linux/io.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/of_iommu.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
@@ -108,8 +109,6 @@ enum {
(SMMU_STATS_CACHE_COUNT_BASE + 8 * cache + 4 * hitmiss)
#define SMMU_TRANSLATION_ENABLE_0 0x228
-#define SMMU_TRANSLATION_ENABLE_1 0x22c
-#define SMMU_TRANSLATION_ENABLE_2 0x230
#define SMMU_AFI_ASID 0x238 /* PCIE */
#define SMMU_ASID_BASE SMMU_AFI_ASID
@@ -237,12 +236,12 @@ struct smmu_device {
struct rb_root clients;
struct page *avp_vector_page; /* dummy page shared by all AS's */
+ int nr_xlats; /* number of translation_enable registers */
+
/*
* Register image savers for suspend/resume
*/
- unsigned long translation_enable_0;
- unsigned long translation_enable_1;
- unsigned long translation_enable_2;
+ u32 *xlat;
unsigned long asid_security;
struct dentry *debugfs_root;
@@ -256,6 +255,11 @@ struct smmu_device {
struct smmu_as as[0]; /* Run-time allocated array */
};
+struct smmu_platform_data {
+ int asids; /* number of asids */
+ int nr_xlats; /* number of translation_enable registers */
+};
+
static struct smmu_device *smmu_handle; /* unique for a system */
/*
@@ -506,9 +510,10 @@ static int smmu_setup_regs(struct smmu_device *smmu)
__smmu_client_set_swgroups(c, c->swgroups, 1);
}
- smmu_write(smmu, smmu->translation_enable_0, SMMU_TRANSLATION_ENABLE_0);
- smmu_write(smmu, smmu->translation_enable_1, SMMU_TRANSLATION_ENABLE_1);
- smmu_write(smmu, smmu->translation_enable_2, SMMU_TRANSLATION_ENABLE_2);
+ for (i = 0; i < smmu->nr_xlats; i++)
+ smmu_write(smmu, smmu->xlat[i],
+ SMMU_TRANSLATION_ENABLE_0 + i * sizeof(u32));
+
smmu_write(smmu, smmu->asid_security, SMMU_ASID_SECURITY);
smmu_write(smmu, SMMU_TLB_CONFIG_RESET_VAL, SMMU_CACHE_CONFIG(_TLB));
smmu_write(smmu, SMMU_PTC_CONFIG_RESET_VAL, SMMU_CACHE_CONFIG(_PTC));
@@ -1205,11 +1210,13 @@ err_out:
static int tegra_smmu_suspend(struct device *dev)
{
+ int i;
struct smmu_device *smmu = dev_get_drvdata(dev);
- smmu->translation_enable_0 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_0);
- smmu->translation_enable_1 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_1);
- smmu->translation_enable_2 = smmu_read(smmu, SMMU_TRANSLATION_ENABLE_2);
+ for (i = 0; i < smmu->nr_xlats; i++)
+ smmu->xlat[i] = smmu_read(smmu,
+ SMMU_TRANSLATION_ENABLE_0 + i * sizeof(u32));
+
smmu->asid_security = smmu_read(smmu, SMMU_ASID_SECURITY);
return 0;
}
@@ -1243,6 +1250,18 @@ static void tegra_smmu_create_default_map(struct smmu_device *smmu)
}
}
+static const struct smmu_platform_data tegra124_smmu_pdata = {
+ .asids = 128,
+ .nr_xlats = 4,
+};
+
+static struct of_device_id tegra_smmu_of_match[] = {
+ { .compatible = "nvidia,tegra124-smmu", .data = &tegra124_smmu_pdata, },
+ { .compatible = "nvidia,tegra30-smmu", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tegra_smmu_of_match);
+
static int tegra_smmu_probe(struct platform_device *pdev)
{
struct smmu_device *smmu;
@@ -1250,20 +1269,29 @@ static int tegra_smmu_probe(struct platform_device *pdev)
int i, asids, err = 0;
dma_addr_t uninitialized_var(base);
size_t bytes, uninitialized_var(size);
+ const struct of_device_id *match;
+ const struct smmu_platform_data *pdata;
+ int nr_xlats;
if (smmu_handle)
return -EIO;
BUILD_BUG_ON(PAGE_SHIFT != SMMU_PAGE_SHIFT);
- if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids))
- return -ENODEV;
+ match = of_match_device(tegra_smmu_of_match, &pdev->dev);
+ if (!match)
+ return -EINVAL;
+ pdata = match->data;
+ nr_xlats = (pdata && pdata->nr_xlats) ? pdata->nr_xlats : 3;
+ if (of_property_read_u32(dev->of_node, "nvidia,#asids", &asids))
+ asids = (pdata && pdata->asids) ? pdata->asids : 4;
if (asids < NUM_OF_STATIC_MAPS)
return -EINVAL;
bytes = sizeof(*smmu) + asids * (sizeof(*smmu->as) +
sizeof(struct dma_iommu_mapping *));
+ bytes += sizeof(u32) * nr_xlats;
smmu = devm_kzalloc(dev, bytes, GFP_KERNEL);
if (!smmu) {
dev_err(dev, "failed to allocate smmu_device\n");
@@ -1272,6 +1300,7 @@ static int tegra_smmu_probe(struct platform_device *pdev)
smmu->clients = RB_ROOT;
smmu->map = (struct dma_iommu_mapping **)(smmu->as + asids);
+ smmu->xlat = (u32 *)(smmu->map + smmu->num_as);
smmu->nregs = pdev->num_resources;
smmu->regs = devm_kzalloc(dev, 2 * smmu->nregs * sizeof(*smmu->regs),
GFP_KERNEL);
@@ -1304,13 +1333,12 @@ static int tegra_smmu_probe(struct platform_device *pdev)
smmu->ahb = of_parse_phandle(dev->of_node, "nvidia,ahb", 0);
smmu->iommu.dev = dev;
smmu->num_as = asids;
+ smmu->nr_xlats = nr_xlats;
smmu->iovmm_base = base;
smmu->page_count = size;
-
- smmu->translation_enable_0 = ~0;
- smmu->translation_enable_1 = ~0;
- smmu->translation_enable_2 = ~0;
smmu->asid_security = 0;
+ for (i = 0; i < smmu->nr_xlats; i++)
+ smmu->xlat[i] = ~0;
for (i = 0; i < smmu->num_as; i++) {
struct smmu_as *as = &smmu->as[i];
@@ -1365,12 +1393,6 @@ static const struct dev_pm_ops tegra_smmu_pm_ops = {
.resume = tegra_smmu_resume,
};
-static struct of_device_id tegra_smmu_of_match[] = {
- { .compatible = "nvidia,tegra30-smmu", },
- { },
-};
-MODULE_DEVICE_TABLE(of, tegra_smmu_of_match);
-
static struct platform_driver tegra_smmu_driver = {
.probe = tegra_smmu_probe,
.remove = tegra_smmu_remove,
--
1.8.1.5
--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
