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nvgpu: gv11b: implement railgate/unrailgate

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Implement gv11b platform specific rail gating functions
by calling relevant powergate and unpowergate functions
and linux clock frmework functions:

gv11b_tegra_is_railgated
gv11b_tegra_railgate
gv11b_tegra_unrailgate

These calls will take care of hot reset sequence
required for gpu powergate and gpu unpowergate.

Bug 200269361
Bug 200273571

Change-Id: Ib1825e4324d51fc508b3b5dc9e5e2fdb252eeff4
Signed-off-by: seshendra Gadagottu <sgadagottu@nvidia.com>
Signed-off-by: Seema Khowala <seemaj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1589509
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Seema Khowala
2017-10-31 20:56:29 -07:00
committed by mobile promotions
parent d73e89f984
commit bcd78a0be6
1 changed files with 59 additions and 0 deletions
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59
drivers/gpu/nvgpu/gv11b/platform_gv11b_tegra.c
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@@ -28,11 +28,15 @@
#include <linux/nvmap.h>
#include <linux/reset.h>
#include <linux/hashtable.h>
#include <linux/clk.h>
#include <nvgpu/nvhost.h>
#include <nvgpu/nvhost_t19x.h>
#include <uapi/linux/nvgpu.h>
#include <soc/tegra/tegra_bpmp.h>
#include <soc/tegra/tegra_powergate.h>
#include "gk20a/gk20a.h"
#include "common/linux/platform_gk20a.h"
#include "common/linux/clk.h"
@@ -103,18 +107,73 @@ static int gv11b_tegra_remove(struct device *dev)
static bool gv11b_tegra_is_railgated(struct device *dev)
{
bool ret = false;
#ifdef TEGRA194_POWER_DOMAIN_GPU
struct gk20a *g = get_gk20a(dev);
if (tegra_bpmp_running()) {
nvgpu_log(g, gpu_dbg_info, "bpmp running");
ret = !tegra_powergate_is_powered(TEGRA194_POWER_DOMAIN_GPU);
nvgpu_log(g, gpu_dbg_info, "railgated? %s", ret ? "yes" : "no");
} else {
nvgpu_log(g, gpu_dbg_info, "bpmp not running");
}
#endif
return ret;
}
static int gv11b_tegra_railgate(struct device *dev)
{
#ifdef TEGRA194_POWER_DOMAIN_GPU
struct gk20a_platform *platform = gk20a_get_platform(dev);
struct gk20a *g = get_gk20a(dev);
int i;
if (tegra_bpmp_running()) {
nvgpu_log(g, gpu_dbg_info, "bpmp running");
if (!tegra_powergate_is_powered(TEGRA194_POWER_DOMAIN_GPU)) {
nvgpu_log(g, gpu_dbg_info, "powergate is not powered");
return 0;
}
nvgpu_log(g, gpu_dbg_info, "clk_disable_unprepare");
for (i = 0; i < platform->num_clks; i++) {
if (platform->clk[i])
clk_disable_unprepare(platform->clk[i]);
}
nvgpu_log(g, gpu_dbg_info, "powergate_partition");
tegra_powergate_partition(TEGRA194_POWER_DOMAIN_GPU);
} else {
nvgpu_log(g, gpu_dbg_info, "bpmp not running");
}
#endif
return 0;
}
static int gv11b_tegra_unrailgate(struct device *dev)
{
int ret = 0;
#ifdef TEGRA194_POWER_DOMAIN_GPU
struct gk20a_platform *platform = gk20a_get_platform(dev);
struct gk20a *g = get_gk20a(dev);
int i;
if (tegra_bpmp_running()) {
nvgpu_log(g, gpu_dbg_info, "bpmp running");
ret = tegra_unpowergate_partition(TEGRA194_POWER_DOMAIN_GPU);
if (ret) {
nvgpu_log(g, gpu_dbg_info,
"unpowergate partition failed");
return ret;
}
nvgpu_log(g, gpu_dbg_info, "clk_prepare_enable");
for (i = 0; i < platform->num_clks; i++) {
if (platform->clk[i])
clk_prepare_enable(platform->clk[i]);
}
} else {
nvgpu_log(g, gpu_dbg_info, "bpmp not running");
}
#endif
return ret;
}