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memory: tegra: Parameterize interrupt handler 

Tegra20 requires a slightly different interrupt handler than Tegra30 and
later, so parameterize the handler, so that each SoC implementation can
provide its own.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20210602163302.120041-8-thierry.reding@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
This commit is contained in:
Thierry Reding 2021-06-02 18:32:57 +02:00 committed by Krzysztof Kozlowski
parent ddeceab0a9
commit 1079a66bc3
4 changed files with 106 additions and 109 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

136
drivers/memory/tegra/mc.c
View File

@ -492,32 +492,7 @@ int tegra30_mc_probe(struct tegra_mc *mc)
return 0;
}
const struct tegra_mc_ops tegra30_mc_ops = {
.probe = tegra30_mc_probe,
};
#endif
static const char *const status_names[32] = {
[ 1] = "External interrupt",
[ 6] = "EMEM address decode error",
[ 7] = "GART page fault",
[ 8] = "Security violation",
[ 9] = "EMEM arbitration error",
[10] = "Page fault",
[11] = "Invalid APB ASID update",
[12] = "VPR violation",
[13] = "Secure carveout violation",
[16] = "MTS carveout violation",
};
static const char *const error_names[8] = {
[2] = "EMEM decode error",
[3] = "TrustZone violation",
[4] = "Carveout violation",
[6] = "SMMU translation error",
};
static irqreturn_t tegra_mc_irq(int irq, void *data)
static irqreturn_t tegra30_mc_handle_irq(int irq, void *data)
{
struct tegra_mc *mc = data;
unsigned long status;
@ -529,7 +504,7 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
return IRQ_NONE;
for_each_set_bit(bit, &status, 32) {
const char *error = status_names[bit] ?: "unknown";
const char *error = tegra_mc_status_names[bit] ?: "unknown";
const char *client = "unknown", *desc;
const char *direction, *secure;
phys_addr_t addr = 0;
@ -569,7 +544,7 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
type = (value & MC_ERR_STATUS_TYPE_MASK) >>
MC_ERR_STATUS_TYPE_SHIFT;
desc = error_names[type];
desc = tegra_mc_error_names[type];
switch (value & MC_ERR_STATUS_TYPE_MASK) {
case MC_ERR_STATUS_TYPE_INVALID_SMMU_PAGE:
@ -614,78 +589,31 @@ static irqreturn_t tegra_mc_irq(int irq, void *data)
return IRQ_HANDLED;
}
static __maybe_unused irqreturn_t tegra20_mc_irq(int irq, void *data)
{
struct tegra_mc *mc = data;
unsigned long status;
unsigned int bit;
const struct tegra_mc_ops tegra30_mc_ops = {
.probe = tegra30_mc_probe,
.handle_irq = tegra30_mc_handle_irq,
};
#endif
/* mask all interrupts to avoid flooding */
status = mc_readl(mc, MC_INTSTATUS) & mc->soc->intmask;
if (!status)
return IRQ_NONE;
const char *const tegra_mc_status_names[32] = {
[ 1] = "External interrupt",
[ 6] = "EMEM address decode error",
[ 7] = "GART page fault",
[ 8] = "Security violation",
[ 9] = "EMEM arbitration error",
[10] = "Page fault",
[11] = "Invalid APB ASID update",
[12] = "VPR violation",
[13] = "Secure carveout violation",
[16] = "MTS carveout violation",
};
for_each_set_bit(bit, &status, 32) {
const char *direction = "read", *secure = "";
const char *error = status_names[bit];
const char *client, *desc;
phys_addr_t addr;
u32 value, reg;
u8 id, type;
switch (BIT(bit)) {
case MC_INT_DECERR_EMEM:
reg = MC_DECERR_EMEM_OTHERS_STATUS;
value = mc_readl(mc, reg);
id = value & mc->soc->client_id_mask;
desc = error_names[2];
if (value & BIT(31))
direction = "write";
break;
case MC_INT_INVALID_GART_PAGE:
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;
value = mc_readl(mc, reg);
id = value & mc->soc->client_id_mask;
type = (value & BIT(30)) ? 4 : 3;
desc = error_names[type];
secure = "secure ";
if (value & BIT(31))
direction = "write";
break;
default:
continue;
}
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,
desc);
}
/* clear interrupts */
mc_writel(mc, status, MC_INTSTATUS);
return IRQ_HANDLED;
}
const char *const tegra_mc_error_names[8] = {
[2] = "EMEM decode error",
[3] = "TrustZone violation",
[4] = "Carveout violation",
[6] = "SMMU translation error",
};
/*
* Memory Controller (MC) has few Memory Clients that are issuing memory
@ -786,7 +714,6 @@ static int tegra_mc_probe(struct platform_device *pdev)
{
struct resource *res;
struct tegra_mc *mc;
void *isr;
u64 mask;
int err;
@ -823,15 +750,6 @@ static int tegra_mc_probe(struct platform_device *pdev)
return err;
}
#ifdef CONFIG_ARCH_TEGRA_2x_SOC
if (mc->soc == &tegra20_mc_soc) {
isr = tegra20_mc_irq;
} else
#endif
{
isr = tegra_mc_irq;
}
mc->irq = platform_get_irq(pdev, 0);
if (mc->irq < 0)
return mc->irq;
@ -840,7 +758,7 @@ static int tegra_mc_probe(struct platform_device *pdev)
mc_writel(mc, mc->soc->intmask, MC_INTMASK);
err = devm_request_irq(&pdev->dev, mc->irq, isr, 0,
err = devm_request_irq(&pdev->dev, mc->irq, mc->soc->ops->handle_irq, 0,
dev_name(&pdev->dev), mc);
if (err < 0) {
dev_err(&pdev->dev, "failed to request IRQ#%u: %d\n", mc->irq,

3
drivers/memory/tegra/mc.h
View File

@ -138,6 +138,9 @@ int tegra30_mc_probe(struct tegra_mc *mc);
extern const struct tegra_mc_ops tegra30_mc_ops;
#endif
extern const char * const tegra_mc_status_names[32];
extern const char * const tegra_mc_error_names[8];
/*
* These IDs are for internal use of Tegra ICC drivers. The ID numbers are
* chosen such that they don't conflict with the device-tree ICC node IDs.

74
drivers/memory/tegra/tegra20.c
View File

@ -713,10 +713,84 @@ static int tegra20_mc_resume(struct tegra_mc *mc)
return 0;
}
static irqreturn_t tegra20_mc_handle_irq(int irq, void *data)
{
struct tegra_mc *mc = data;
unsigned long status;
unsigned int bit;
/* mask all interrupts to avoid flooding */
status = mc_readl(mc, MC_INTSTATUS) & mc->soc->intmask;
if (!status)
return IRQ_NONE;
for_each_set_bit(bit, &status, 32) {
const char *error = tegra_mc_status_names[bit];
const char *direction = "read", *secure = "";
const char *client, *desc;
phys_addr_t addr;
u32 value, reg;
u8 id, type;
switch (BIT(bit)) {
case MC_INT_DECERR_EMEM:
reg = MC_DECERR_EMEM_OTHERS_STATUS;
value = mc_readl(mc, reg);
id = value & mc->soc->client_id_mask;
desc = tegra_mc_error_names[2];
if (value & BIT(31))
direction = "write";
break;
case MC_INT_INVALID_GART_PAGE:
reg = MC_GART_ERROR_REQ;
value = mc_readl(mc, reg);
id = (value >> 1) & mc->soc->client_id_mask;
desc = tegra_mc_error_names[2];
if (value & BIT(0))
direction = "write";
break;
case MC_INT_SECURITY_VIOLATION:
reg = MC_SECURITY_VIOLATION_STATUS;
value = mc_readl(mc, reg);
id = value & mc->soc->client_id_mask;
type = (value & BIT(30)) ? 4 : 3;
desc = tegra_mc_error_names[type];
secure = "secure ";
if (value & BIT(31))
direction = "write";
break;
default:
continue;
}
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,
desc);
}
/* clear interrupts */
mc_writel(mc, status, MC_INTSTATUS);
return IRQ_HANDLED;
}
static const struct tegra_mc_ops tegra20_mc_ops = {
.probe = tegra20_mc_probe,
.suspend = tegra20_mc_suspend,
.resume = tegra20_mc_resume,
.handle_irq = tegra20_mc_handle_irq,
};
const struct tegra_mc_soc tegra20_mc_soc = {

2
include/soc/tegra/mc.h
View File

@ -10,6 +10,7 @@
#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/interconnect-provider.h>
#include <linux/irq.h>
#include <linux/reset-controller.h>
#include <linux/types.h>
@ -177,6 +178,7 @@ struct tegra_mc_ops {
int (*probe)(struct tegra_mc *mc);
int (*suspend)(struct tegra_mc *mc);
int (*resume)(struct tegra_mc *mc);
irqreturn_t (*handle_irq)(int irq, void *data);
};
struct tegra_mc_soc {