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gpu: nvgpu: ga10b: Support emulate mode

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Add sysfs node to enable gpu emulate_mode and
pass the value to acr through acr descriptor struct.

Bug 3279344

Change-Id: I936b1dda84d7f4f3688237308223c019798bdce3
Signed-off-by: Mayur Poojary <mpoojary@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2591377
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Mayur Poojary
2021-09-08 19:15:07 +05:30
committed by mobile promotions
parent 95c954cf9f
commit fe7368f8f4
5 changed files with 62 additions and 0 deletions
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6
drivers/gpu/nvgpu/common/acr/acr_sw_ga10b.c
View File

@@ -25,6 +25,7 @@
#include <nvgpu/bug.h>
#include <nvgpu/dma.h>
#include <nvgpu/pmu.h>
#include <nvgpu/grmgr.h>
#ifdef CONFIG_NVGPU_LS_PMU
#include <nvgpu/pmu/fw.h>
#endif
@@ -154,6 +155,11 @@ static int ga10b_acr_patch_wpr_info_to_ucode(struct gk20a *g,
* Offset from the WPR region holding the wpr header
*/
acr_sysmem_desc->wpr_offset = WPR_OFFSET;
if (g->emulate_mode < EMULATE_MODE_MAX_CONFIG) {
acr_sysmem_desc->gpu_mode &= (~EMULATE_MODE_MASK);
acr_sysmem_desc->gpu_mode |= g->emulate_mode;
}
}
load:
/*

7
drivers/gpu/nvgpu/common/acr/nvgpu_acr_interface.h
View File

@@ -775,6 +775,13 @@ struct flcn2_acr_desc {
u64 nonwpr_ucode_blob_start;
u64 ls_pmu_desc;
/**
* stores flag value to enable:
* emulate_mode 7:0 bit
* MIG mode 15:8 bit
*/
u32 gpu_mode;
};
/** @} */

3
drivers/gpu/nvgpu/include/nvgpu/gk20a.h
View File

@@ -833,6 +833,9 @@ struct gk20a {
/** Cache to store IPA to PA translations. */
struct nvgpu_ipa_pa_cache ipa_pa_cache;
#endif
/** To enable emulate mode */
u32 emulate_mode;
};
/**

9
drivers/gpu/nvgpu/include/nvgpu/grmgr.h
View File

@@ -30,6 +30,15 @@
#include <nvgpu/enabled.h>
#include <nvgpu/gk20a.h>
#define EMULATE_MODE_MASK 0X000000FFU
enum emulate_mode_config {
EMULATE_MODE_DISABLE = 0U,
EMULATE_MODE_1_GPC = 1U,
EMULATE_MODE_2_GPC = 2U,
EMULATE_MODE_MAX_CONFIG = 3U
};
struct gk20a;
int nvgpu_init_gr_manager(struct gk20a *g);

37
drivers/gpu/nvgpu/os/linux/sysfs.c
View File

@@ -1170,6 +1170,41 @@ static DEVICE_ATTR(mig_mode_config, ROOTRW,
#endif
static ssize_t emulate_mode_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct gk20a *g = get_gk20a(dev);
unsigned long val = 0;
if (kstrtoul(buf, 10, &val) < 0)
return -EINVAL;
if (nvgpu_is_powered_on(g)) {
nvgpu_err(g, "GPU is powered on already, emulate mode "
"cannot be enabled");
return -EINVAL;
}
if (val < EMULATE_MODE_MAX_CONFIG) {
g->emulate_mode = val;
nvgpu_info(g, "emulate mode is set to %d.", g->emulate_mode);
} else {
nvgpu_err(g, "Unsupported emulate_mode %lx", val);
}
return count;
}
static ssize_t emulate_mode_read(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct gk20a *g = get_gk20a(dev);
return snprintf(buf, NVGPU_CPU_PAGE_SIZE, "%d\n", g->emulate_mode);
}
static DEVICE_ATTR(emulate_mode, ROOTRW, emulate_mode_read, emulate_mode_store);
void nvgpu_remove_sysfs(struct device *dev)
{
device_remove_file(dev, &dev_attr_elcg_enable);
@@ -1215,6 +1250,7 @@ void nvgpu_remove_sysfs(struct device *dev)
device_remove_file(dev, &dev_attr_mig_mode_config_list);
device_remove_file(dev, &dev_attr_mig_mode_config);
#endif
device_remove_file(dev, &dev_attr_emulate_mode);
if (strcmp(dev_name(dev), "gpu.0")) {
struct kobject *kobj = &dev->kobj;
struct device *parent = container_of((kobj->parent),
@@ -1279,6 +1315,7 @@ int nvgpu_create_sysfs(struct device *dev)
error |= device_create_file(dev, &dev_attr_mig_mode_config_list);
error |= device_create_file(dev, &dev_attr_mig_mode_config);
#endif
error |= device_create_file(dev, &dev_attr_emulate_mode);
if (strcmp(dev_name(dev), "gpu.0")) {
struct kobject *kobj = &dev->kobj;
struct device *parent = container_of((kobj->parent),