In order to report clients name and access direction on GART's page fault,
MC driver need to access GART registers. Add facility that provides access
to the GART.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/memory/tegra/mc.c | 26 +++++++++++++++++++++++---
include/soc/tegra/mc.h | 13 +++++++++++++
2 files changed, 36 insertions(+), 3 deletions(-)
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index e56862495f36..4940d72b5263 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -72,6 +72,8 @@ static const struct of_device_id tegra_mc_of_match[] = {
};
MODULE_DEVICE_TABLE(of, tegra_mc_of_match);
+static struct tegra_mc_gart_handle *gart_handle;
+
static int terga_mc_block_dma_common(struct tegra_mc *mc,
const struct tegra_mc_reset *rst)
{
@@ -543,6 +545,11 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
return IRQ_HANDLED;
}
+void tegra_mc_register_gart(struct tegra_mc_gart_handle *handle)
+{
+ WRITE_ONCE(gart_handle, handle);
+}
+
static __maybe_unused irqreturn_t tegra20_mc_irq(int irq, void *data)
{
struct tegra_mc *mc = data;
@@ -565,6 +572,7 @@ static __maybe_unused irqreturn_t tegra20_mc_irq(int irq, void *data)
switch (BIT(bit)) {
case MC_INT_DECERR_EMEM:
reg = MC_DECERR_EMEM_OTHERS_STATUS;
+ addr = mc_readl(mc, reg + sizeof(u32));
value = mc_readl(mc, reg);
id = value & mc->soc->client_id_mask;
@@ -575,11 +583,24 @@ 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;
+ if (gart_handle == NULL) {
+ dev_err_ratelimited(mc->dev, "%s\n", error);
+ continue;
+ }
+
+ addr = gart_handle->error_addr(gart_handle);
+ value = gart_handle->error_req(gart_handle);
+
+ 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;
+ addr = mc_readl(mc, reg + sizeof(u32));
value = mc_readl(mc, reg);
id = value & mc->soc->client_id_mask;
@@ -596,7 +617,6 @@ static __maybe_unused irqreturn_t tegra20_mc_irq(int irq, void *data)
}
client = mc->soc->clients[id].name;
- addr = mc_readl(mc, reg + sizeof(u32));
dev_err_ratelimited(mc->dev, "%s: %s%s @%pa: %s (%s)\n",
client, secure, direction, &addr, error,
diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h
index b43f37fea096..5bf72eb4dd51 100644
--- a/include/soc/tegra/mc.h
+++ b/include/soc/tegra/mc.h
@@ -162,4 +162,17 @@ struct tegra_mc {
void tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate);
unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc);
+struct tegra_mc_gart_handle {
+ u32 (*error_addr)(struct tegra_mc_gart_handle *handle);
+ u32 (*error_req)(struct tegra_mc_gart_handle *handle);
+};
+
+#ifdef CONFIG_TEGRA_MC
+void tegra_mc_register_gart(struct tegra_mc_gart_handle *handle);
+#else
+static inline void tegra_mc_register_gart(struct tegra_mc_gart_handle *handle)
+{
+}
+#endif
+
#endif /* __SOC_TEGRA_MC_H__ */
--
2.18.0
--
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