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path: root/drivers/memory/tegra/mc.c
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Diffstat (limited to 'drivers/memory/tegra/mc.c')
-rw-r--r--drivers/memory/tegra/mc.c118
1 files changed, 82 insertions, 36 deletions
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index 24afc36833bf..0a53598d982f 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -12,6 +12,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sort.h>
@@ -38,6 +39,7 @@
#define MC_ERR_ADR 0x0c
+#define MC_GART_ERROR_REQ 0x30
#define MC_DECERR_EMEM_OTHERS_STATUS 0x58
#define MC_SECURITY_VIOLATION_STATUS 0x74
@@ -51,7 +53,7 @@
static const struct of_device_id tegra_mc_of_match[] = {
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
- { .compatible = "nvidia,tegra20-mc", .data = &tegra20_mc_soc },
+ { .compatible = "nvidia,tegra20-mc-gart", .data = &tegra20_mc_soc },
#endif
#ifdef CONFIG_ARCH_TEGRA_3x_SOC
{ .compatible = "nvidia,tegra30-mc", .data = &tegra30_mc_soc },
@@ -161,7 +163,7 @@ static int tegra_mc_hotreset_assert(struct reset_controller_dev *rcdev,
/* block clients DMA requests */
err = rst_ops->block_dma(mc, rst);
if (err) {
- dev_err(mc->dev, "Failed to block %s DMA: %d\n",
+ dev_err(mc->dev, "failed to block %s DMA: %d\n",
rst->name, err);
return err;
}
@@ -171,7 +173,7 @@ static int tegra_mc_hotreset_assert(struct reset_controller_dev *rcdev,
/* wait for completion of the outstanding DMA requests */
while (!rst_ops->dma_idling(mc, rst)) {
if (!retries--) {
- dev_err(mc->dev, "Failed to flush %s DMA\n",
+ dev_err(mc->dev, "failed to flush %s DMA\n",
rst->name);
return -EBUSY;
}
@@ -184,7 +186,7 @@ static int tegra_mc_hotreset_assert(struct reset_controller_dev *rcdev,
/* clear clients DMA requests sitting before arbitration */
err = rst_ops->hotreset_assert(mc, rst);
if (err) {
- dev_err(mc->dev, "Failed to hot reset %s: %d\n",
+ dev_err(mc->dev, "failed to hot reset %s: %d\n",
rst->name, err);
return err;
}
@@ -213,7 +215,7 @@ static int tegra_mc_hotreset_deassert(struct reset_controller_dev *rcdev,
/* take out client from hot reset */
err = rst_ops->hotreset_deassert(mc, rst);
if (err) {
- dev_err(mc->dev, "Failed to deassert hot reset %s: %d\n",
+ dev_err(mc->dev, "failed to deassert hot reset %s: %d\n",
rst->name, err);
return err;
}
@@ -223,7 +225,7 @@ static int tegra_mc_hotreset_deassert(struct reset_controller_dev *rcdev,
/* allow new DMA requests to proceed to arbitration */
err = rst_ops->unblock_dma(mc, rst);
if (err) {
- dev_err(mc->dev, "Failed to unblock %s DMA : %d\n",
+ dev_err(mc->dev, "failed to unblock %s DMA : %d\n",
rst->name, err);
return err;
}
@@ -575,8 +577,15 @@ static __maybe_unused irqreturn_t tegra20_mc_irq(int irq, void *data)
break;
case MC_INT_INVALID_GART_PAGE:
- dev_err_ratelimited(mc->dev, "%s\n", error);
- continue;
+ reg = MC_GART_ERROR_REQ;
+ value = mc_readl(mc, reg);
+
+ id = (value >> 1) & mc->soc->client_id_mask;
+ desc = error_names[2];
+
+ if (value & BIT(0))
+ direction = "write";
+ break;
case MC_INT_SECURITY_VIOLATION:
reg = MC_SECURITY_VIOLATION_STATUS;
@@ -611,23 +620,18 @@ static __maybe_unused irqreturn_t tegra20_mc_irq(int irq, void *data)
static int tegra_mc_probe(struct platform_device *pdev)
{
- const struct of_device_id *match;
struct resource *res;
struct tegra_mc *mc;
void *isr;
int err;
- match = of_match_node(tegra_mc_of_match, pdev->dev.of_node);
- if (!match)
- return -ENODEV;
-
mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
if (!mc)
return -ENOMEM;
platform_set_drvdata(pdev, mc);
spin_lock_init(&mc->lock);
- mc->soc = match->data;
+ mc->soc = of_device_get_match_data(&pdev->dev);
mc->dev = &pdev->dev;
/* length of MC tick in nanoseconds */
@@ -638,38 +642,35 @@ static int tegra_mc_probe(struct platform_device *pdev)
if (IS_ERR(mc->regs))
return PTR_ERR(mc->regs);
+ mc->clk = devm_clk_get(&pdev->dev, "mc");
+ if (IS_ERR(mc->clk)) {
+ dev_err(&pdev->dev, "failed to get MC clock: %ld\n",
+ PTR_ERR(mc->clk));
+ return PTR_ERR(mc->clk);
+ }
+
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
if (mc->soc == &tegra20_mc_soc) {
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- mc->regs2 = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(mc->regs2))
- return PTR_ERR(mc->regs2);
-
isr = tegra20_mc_irq;
} else
#endif
{
- mc->clk = devm_clk_get(&pdev->dev, "mc");
- if (IS_ERR(mc->clk)) {
- dev_err(&pdev->dev, "failed to get MC clock: %ld\n",
- PTR_ERR(mc->clk));
- return PTR_ERR(mc->clk);
- }
-
err = tegra_mc_setup_latency_allowance(mc);
if (err < 0) {
- dev_err(&pdev->dev, "failed to setup latency allowance: %d\n",
+ dev_err(&pdev->dev,
+ "failed to setup latency allowance: %d\n",
err);
return err;
}
isr = tegra_mc_irq;
- }
- err = tegra_mc_setup_timings(mc);
- if (err < 0) {
- dev_err(&pdev->dev, "failed to setup timings: %d\n", err);
- return err;
+ err = tegra_mc_setup_timings(mc);
+ if (err < 0) {
+ dev_err(&pdev->dev, "failed to setup timings: %d\n",
+ err);
+ return err;
+ }
}
mc->irq = platform_get_irq(pdev, 0);
@@ -678,11 +679,11 @@ static int tegra_mc_probe(struct platform_device *pdev)
return mc->irq;
}
- WARN(!mc->soc->client_id_mask, "Missing client ID mask for this SoC\n");
+ WARN(!mc->soc->client_id_mask, "missing client ID mask for this SoC\n");
mc_writel(mc, mc->soc->intmask, MC_INTMASK);
- err = devm_request_irq(&pdev->dev, mc->irq, isr, IRQF_SHARED,
+ err = devm_request_irq(&pdev->dev, mc->irq, isr, 0,
dev_name(&pdev->dev), mc);
if (err < 0) {
dev_err(&pdev->dev, "failed to request IRQ#%u: %d\n", mc->irq,
@@ -695,20 +696,65 @@ static int tegra_mc_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "failed to register reset controller: %d\n",
err);
- if (IS_ENABLED(CONFIG_TEGRA_IOMMU_SMMU)) {
+ if (IS_ENABLED(CONFIG_TEGRA_IOMMU_SMMU) && mc->soc->smmu) {
mc->smmu = tegra_smmu_probe(&pdev->dev, mc->soc->smmu, mc);
- if (IS_ERR(mc->smmu))
+ if (IS_ERR(mc->smmu)) {
dev_err(&pdev->dev, "failed to probe SMMU: %ld\n",
PTR_ERR(mc->smmu));
+ mc->smmu = NULL;
+ }
+ }
+
+ if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && !mc->soc->smmu) {
+ mc->gart = tegra_gart_probe(&pdev->dev, mc);
+ if (IS_ERR(mc->gart)) {
+ dev_err(&pdev->dev, "failed to probe GART: %ld\n",
+ PTR_ERR(mc->gart));
+ mc->gart = NULL;
+ }
+ }
+
+ return 0;
+}
+
+static int tegra_mc_suspend(struct device *dev)
+{
+ struct tegra_mc *mc = dev_get_drvdata(dev);
+ int err;
+
+ if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && mc->gart) {
+ err = tegra_gart_suspend(mc->gart);
+ if (err)
+ return err;
}
return 0;
}
+static int tegra_mc_resume(struct device *dev)
+{
+ struct tegra_mc *mc = dev_get_drvdata(dev);
+ int err;
+
+ if (IS_ENABLED(CONFIG_TEGRA_IOMMU_GART) && mc->gart) {
+ err = tegra_gart_resume(mc->gart);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops tegra_mc_pm_ops = {
+ .suspend = tegra_mc_suspend,
+ .resume = tegra_mc_resume,
+};
+
static struct platform_driver tegra_mc_driver = {
.driver = {
.name = "tegra-mc",
.of_match_table = tegra_mc_of_match,
+ .pm = &tegra_mc_pm_ops,
.suppress_bind_attrs = true,
},
.prevent_deferred_probe = true,
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