evie/android_kernel_oneplus_msm8998
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coresight-etm4x: add code to allocate memory for dump table

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Add code to allocate and register memory dump entry for dumping etm
registers.

Change-Id: I0487e1c0d4e0fffc5df1456d53567762d7b18d51
Signed-off-by: Shashank Mittal <mittals@codeaurora.org>
This commit is contained in:
Shashank Mittal 2016-02-23 17:54:44 -08:00 • committed by Kyle Yan
parent 14bc610d32
commit ce3d488fbe
2 changed files with 42 additions and 0 deletions
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39
drivers/hwtracing/coresight/coresight-etm4x.c
View file

@ -2548,6 +2548,41 @@ static void etm4_init_default_data(struct etmv4_drvdata *drvdata)
drvdata->trcid = 0x1 + drvdata->cpu;
}
static int etm4_set_reg_dump(struct etmv4_drvdata *drvdata)
{
int ret;
void *baddr;
struct amba_device *adev;
struct resource *res;
struct device *dev = drvdata->dev;
struct msm_dump_entry dump_entry;
uint32_t size;
adev = to_amba_device(dev);
if (!adev)
return -EINVAL;
res = &adev->res;
size = resource_size(res);
baddr = devm_kzalloc(dev, size, GFP_KERNEL);
if (!baddr)
return -ENOMEM;
drvdata->reg_data.addr = virt_to_phys(baddr);
drvdata->reg_data.len = size;
dump_entry.id = MSM_DUMP_DATA_ETM_REG + drvdata->cpu;
dump_entry.addr = virt_to_phys(&drvdata->reg_data);
ret = msm_dump_data_register(MSM_DUMP_TABLE_APPS,
&dump_entry);
if (ret)
devm_kfree(dev, baddr);
return ret;
}
static int etm4_late_init(struct etmv4_drvdata *drvdata)
{
int ret;
@ -2559,6 +2594,10 @@ static int etm4_late_init(struct etmv4_drvdata *drvdata)
etm4_init_default_data(drvdata);
ret = etm4_set_reg_dump(drvdata);
if (ret)
dev_err(dev, "ETM REG dump setup failed. ret %d\n", ret);
desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
if (!desc)
return -ENOMEM;

3
drivers/hwtracing/coresight/coresight-etm4x.h
View file

@ -16,6 +16,7 @@
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include "coresight-priv.h"
#include <soc/qcom/memory_dump.h>
/*
* Device registers:
@ -283,6 +284,7 @@
* @ns_ex_level:In non-secure state, indicates whether instruction tracing is
* supported for the corresponding Exception level.
* @ext_inp: External input selection.
* @reg_data: MSM memory dump data
*/
struct etmv4_drvdata {
void __iomem *base;
@ -371,6 +373,7 @@ struct etmv4_drvdata {
u8 s_ex_level;
u8 ns_ex_level;
u32 ext_inp;
struct msm_dump_data reg_data;
};
/* Address comparator access types */