diff mbox series

[06/14] drm/i915/guc/slpc: Enable SLPC and add related H2G events

Message ID 20210721161120.24610-7-vinay.belgaumkar@intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915/guc: Enable GuC based power management features | expand

Commit Message

Vinay Belgaumkar July 21, 2021, 4:11 p.m. UTC 
Add methods for interacting with GuC for enabling SLPC. Enable
SLPC after GuC submission has been established. GuC load will
fail if SLPC cannot be successfully initialized. Add various
helper methods to set/unset the parameters for SLPC. They can
be set using H2G calls or directly setting bits in the shared
data structure.

This patch also removes the GEM_BUG_ON from guc_submission_disable().
The assumption when that was added was there would be no wakerefs
when it would be called. However, if we fail to enable slpc, we will
still be holding a wakeref.

v2: Address several review comments, add new helpers for
decoding the slpc min/max frequencies. Use masks instead of hardcoded
constants. (Michal W)

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c   | 206 ++++++++++++++++++
 .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h |   2 +
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c |   4 -
 drivers/gpu/drm/i915/gt/uc/intel_uc.c         |  10 +
 4 files changed, 218 insertions(+), 4 deletions(-)

Comments

Michal Wajdeczko July 21, 2021, 5:38 p.m. UTC | #1 
On 21.07.2021 18:11, Vinay Belgaumkar wrote:
> Add methods for interacting with GuC for enabling SLPC. Enable
> SLPC after GuC submission has been established. GuC load will
> fail if SLPC cannot be successfully initialized. Add various
> helper methods to set/unset the parameters for SLPC. They can
> be set using H2G calls or directly setting bits in the shared
> data structure.
> 
> This patch also removes the GEM_BUG_ON from guc_submission_disable().
> The assumption when that was added was there would be no wakerefs
> when it would be called. However, if we fail to enable slpc, we will

s/slpc/SLPC

> still be holding a wakeref.
> 
> v2: Address several review comments, add new helpers for
> decoding the slpc min/max frequencies. Use masks instead of hardcoded
> constants. (Michal W)
> 
> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
> Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
> ---
>  drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c   | 206 ++++++++++++++++++
>  .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h |   2 +
>  .../gpu/drm/i915/gt/uc/intel_guc_submission.c |   4 -
>  drivers/gpu/drm/i915/gt/uc/intel_uc.c         |  10 +
>  4 files changed, 218 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
> index a99d727b5bf0..48db2a8f67d1 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
> @@ -45,6 +45,40 @@ void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc)
>  	guc->slpc_selected = __guc_slpc_selected(guc);
>  }
>  
> +static void slpc_mem_set_param(struct slpc_shared_data *data,
> +				u32 id, u32 value)
> +{
> +	GEM_BUG_ON(id >= SLPC_MAX_OVERRIDE_PARAMETERS);
> +	/*
> +	 * When the flag bit is set, corresponding value will be read
> +	 * and applied by slpc.
> +	 */
> +	data->override_params.bits[id >> 5] |= (1 << (id % 32));
> +	data->override_params.values[id] = value;
> +}
> +
> +static void slpc_mem_set_enabled(struct slpc_shared_data *data,
> +				u8 enable_id, u8 disable_id)
> +{
> +	/*
> +	 * Enabling a param involves setting the enable_id
> +	 * to 1 and disable_id to 0.
> +	 */
> +	slpc_mem_set_param(data, enable_id, 1);
> +	slpc_mem_set_param(data, disable_id, 0);
> +}
> +
> +static void slpc_mem_set_disabled(struct slpc_shared_data *data,
> +				u8 enable_id, u8 disable_id)
> +{
> +	/*
> +	 * Disabling a param involves setting the enable_id
> +	 * to 0 and disable_id to 1.
> +	 */
> +	slpc_mem_set_param(data, disable_id, 1);
> +	slpc_mem_set_param(data, enable_id, 0);
> +}
> +
>  static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
>  {
>  	struct intel_guc *guc = slpc_to_guc(slpc);
> @@ -63,6 +97,116 @@ static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
>  	return err;
>  }
>  
> +static u32 slpc_get_state(struct intel_guc_slpc *slpc)
> +{
> +	struct slpc_shared_data *data;
> +
> +	GEM_BUG_ON(!slpc->vma);
> +
> +	drm_clflush_virt_range(slpc->vaddr, sizeof(u32));
> +	data = slpc->vaddr;
> +
> +	return data->header.global_state;
> +}
> +
> +static bool slpc_is_running(struct intel_guc_slpc *slpc)
> +{
> +	return (slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING);
> +}
> +
> +static int guc_action_slpc_query(struct intel_guc *guc, u32 offset)
> +{
> +	u32 request[] = {
> +		INTEL_GUC_ACTION_SLPC_REQUEST,
> + 		SLPC_EVENT(SLPC_EVENT_QUERY_TASK_STATE, 2),
> +		offset,
> +		0,
> +	};
> +
> + 	return intel_guc_send(guc, request, ARRAY_SIZE(request));
> +}
> +
> +static int slpc_query_task_state(struct intel_guc_slpc *slpc)
> +{
> +	struct intel_guc *guc = slpc_to_guc(slpc);
> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
> +	u32 shared_data_gtt_offset = intel_guc_ggtt_offset(guc, slpc->vma);
> +	int ret;
> +
> +	ret = guc_action_slpc_query(guc, shared_data_gtt_offset);
> +	if (ret)
> +		drm_err(&i915->drm, "Query task state data returned (%pe)\n",
> +				ERR_PTR(ret));
> +
> +	drm_clflush_virt_range(slpc->vaddr, SLPC_PAGE_SIZE_BYTES);
> +
> +	return ret;
> +}
> +
> +static const char *slpc_state_string(struct intel_guc_slpc *slpc)
> +{
> +	const char *str = NULL;
> +	u32 state = slpc_get_state(slpc);
> +
> +	switch (state) {
> +	case SLPC_GLOBAL_STATE_NOT_RUNNING:
> +		str = "not running";
> +		break;
> +	case SLPC_GLOBAL_STATE_INITIALIZING:
> +		str = "initializing";
> +		break;
> +	case SLPC_GLOBAL_STATE_RESETTING:
> +		str = "resetting";
> +		break;
> +	case SLPC_GLOBAL_STATE_RUNNING:
> +		str = "running";
> +		break;
> +	case SLPC_GLOBAL_STATE_SHUTTING_DOWN:
> +		str = "shutting down";
> +		break;
> +	case SLPC_GLOBAL_STATE_ERROR:
> +		str = "error";
> +		break;
> +	default:
> +		str = "unknown";
> +		break;
> +	}

nit: you can split as:

static const char *
slpc_global_state_to_string(enum slpc_global_state state)
{
	switch (state) {
	case SLPC_GLOBAL_STATE_NOT_RUNNING:
		return "not running";
	case SLPC_GLOBAL_STATE_INITIALIZING:
		return "initializing";
	...

and

static const char *slpc_get_state_string(struct intel_guc_slpc *slpc)
{
	return slpc_global_state_to_string(slpc_get_state(slpc));
}


> +
> +	return str;
> +}
> +
> +static int guc_action_slpc_reset(struct intel_guc *guc, u32 offset)
> +{
> +	u32 request[] = {
> +		INTEL_GUC_ACTION_SLPC_REQUEST,
> +		SLPC_EVENT(SLPC_EVENT_RESET, 2),
> +		offset,
> +		0,
> +	};
> +
> + 	return intel_guc_send(guc, request, ARRAY_SIZE(request));

don't know details of H2G request/response message (btw, maybe you can
include something in ABI.h) but be aware that guc_send() might return
non-zero DATA0 so if you don't expect it, return -EPROTO

> +}
> +
> +static int slpc_reset(struct intel_guc_slpc *slpc)
> +{
> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
> +	struct intel_guc *guc = slpc_to_guc(slpc);
> +	u32 shared_data_gtt_offset = intel_guc_ggtt_offset(guc, slpc->vma);

just "offset" ?

> +	int ret;
> +
> +	ret = guc_action_slpc_reset(guc, shared_data_gtt_offset);
> +
> +	if (!ret) {

if (unlikely(ret < 0))
	return ret;

> +		if (wait_for(slpc_is_running(slpc), SLPC_RESET_TIMEOUT_MS)) {
> +			drm_err(&i915->drm, "SLPC not enabled! State = %s\n",
> +				  slpc_state_string(slpc));
> +			return -EIO;
> +		}
> +	}
> +
> +	return ret;
> +}
> +
>  int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>  {
>  	GEM_BUG_ON(slpc->vma);
> @@ -70,6 +214,30 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>  	return slpc_shared_data_init(slpc);
>  }
>  
> +u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
> +{
> +	struct slpc_shared_data *data = slpc->vaddr;
> +
> +	GEM_BUG_ON(!slpc->vma);
> +
> +	return	DIV_ROUND_CLOSEST(
> +		REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
> +			data->task_state_data.freq) *
> +		GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
> +}
> +
> +u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
> +{
> +	struct slpc_shared_data *data = slpc->vaddr;
> +
> +	GEM_BUG_ON(!slpc->vma);
> +
> +	return	DIV_ROUND_CLOSEST(
> +		REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
> +			data->task_state_data.freq) *
> +		GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
> +}
> +
>  /*
>   * intel_guc_slpc_enable() - Start SLPC
>   * @slpc: pointer to intel_guc_slpc.
> @@ -85,6 +253,44 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>   */
>  int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)
>  {
> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
> +	struct slpc_shared_data *data;
> +	int ret;
> +
> +	GEM_BUG_ON(!slpc->vma);
> +
> +	memset(slpc->vaddr, 0, sizeof(struct slpc_shared_data));
> +
> +	data = slpc->vaddr;
> +	data->header.size = sizeof(struct slpc_shared_data);
> +
> +	/* Enable only GTPERF task, disable others */
> +	slpc_mem_set_enabled(data, SLPC_PARAM_TASK_ENABLE_GTPERF,
> +				SLPC_PARAM_TASK_DISABLE_GTPERF);
> +
> +	slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_BALANCER,
> +				SLPC_PARAM_TASK_DISABLE_BALANCER);
> +
> +	slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_DCC,
> +				SLPC_PARAM_TASK_DISABLE_DCC);
> +
> +	ret = slpc_reset(slpc);
> +	if (ret) {

if (unlikely(ret < 0)) ?

> +		drm_err(&i915->drm, "SLPC Reset event returned (%pe)\n",
> +				ERR_PTR(ret));
> +		return ret;
> +	}
> +
> +	drm_info(&i915->drm, "SLPC state: %s\n", slpc_state_string(slpc));

do we expect here something else than "running" ?

> +
> +	slpc_query_task_state(slpc);
> +
> +	/* min and max frequency limits being used by SLPC */
> +	drm_info(&i915->drm, "SLPC min freq: %u Mhz, max is %u Mhz\n",
> +			slpc_decode_min_freq(slpc),
> +			slpc_decode_max_freq(slpc));
> +
> +
>  	return 0;
>  }
>  
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
> index 214a449e78f2..c417992b1346 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
> @@ -9,6 +9,8 @@
>  #include <linux/types.h>
>  #include "abi/guc_actions_slpc_abi.h"
>  
> +#define SLPC_RESET_TIMEOUT_MS 5
> +
>  struct intel_guc_slpc {
>  
>  	struct i915_vma *vma;
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> index 9083bd4adb22..142e44dc5bf1 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
> @@ -2506,10 +2506,6 @@ void intel_guc_submission_enable(struct intel_guc *guc)
>  
>  void intel_guc_submission_disable(struct intel_guc *guc)
>  {
> -	struct intel_gt *gt = guc_to_gt(guc);
> -
> -	GEM_BUG_ON(gt->awake); /* GT should be parked first */
> ->  	/* Note: By the time we're here, GuC may have already been reset */
>  }
>  
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> index e6bd9406c7b2..3f2aa83c5c45 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
> @@ -506,6 +506,14 @@ static int __uc_init_hw(struct intel_uc *uc)
>  		 "submission",
>  		 enableddisabled(intel_uc_uses_guc_submission(uc)));
>  
> +	if (intel_uc_uses_guc_slpc(uc)) {
> +		ret = intel_guc_slpc_enable(&guc->slpc);
> +		if (ret)
> +			goto err_submission;
> +		drm_info(&i915->drm, "GuC SLPC %s\n",
> +			 enableddisabled(intel_uc_uses_guc_slpc(uc)));

there will be (in this order):

	"GuC submission enabled\n"
	"SLPC state: running\n"
	"SLPC min freq: %u Mhz, max is %u Mhz\n"
	"GuC SLPC enabled\n"

is this what you wanted ?

Michal

> +	}
> +
>  	if (intel_uc_uses_huc(uc)) {
>  		drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
>  			 intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
> @@ -520,6 +528,8 @@ static int __uc_init_hw(struct intel_uc *uc)
>  	/*
>  	 * We've failed to load the firmware :(
>  	 */
> +err_submission:
> +	intel_guc_submission_disable(guc);
>  err_log_capture:
>  	__uc_capture_load_err_log(uc);
>  err_out:
>
kernel test robot July 21, 2021, 11:44 p.m. UTC | #2 
Hi Vinay,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210721]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-randconfig-a016-20210720 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project c781eb153bfbd1b52b03efe34f56bbeccbb8aba6)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/14352081e4f18759e70413f3be4151d623c97b8c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
        git checkout 14352081e4f18759e70413f3be4151d623c97b8c
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:217:5: warning: no previous prototype for function 'slpc_decode_min_freq' [-Wmissing-prototypes]
   u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
       ^
   drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:217:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
   ^
   static 
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:229:5: warning: no previous prototype for function 'slpc_decode_max_freq' [-Wmissing-prototypes]
   u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
       ^
   drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:229:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
   ^
   static 
   2 warnings generated.


vim +/slpc_decode_min_freq +217 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c

   216	
 > 217	u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
   218	{
   219		struct slpc_shared_data *data = slpc->vaddr;
   220	
   221		GEM_BUG_ON(!slpc->vma);
   222	
   223		return	DIV_ROUND_CLOSEST(
   224			REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
   225				data->task_state_data.freq) *
   226			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   227	}
   228	
 > 229	u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
   230	{
   231		struct slpc_shared_data *data = slpc->vaddr;
   232	
   233		GEM_BUG_ON(!slpc->vma);
   234	
   235		return	DIV_ROUND_CLOSEST(
   236			REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
   237				data->task_state_data.freq) *
   238			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   239	}
   240	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
kernel test robot July 22, 2021, 2:36 a.m. UTC | #3 
Hi Vinay,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210721]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://github.com/0day-ci/linux/commit/14352081e4f18759e70413f3be4151d623c97b8c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
        git checkout 14352081e4f18759e70413f3be4151d623c97b8c
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:217:5: warning: no previous prototype for 'slpc_decode_min_freq' [-Wmissing-prototypes]
     217 | u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
         |     ^~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:229:5: warning: no previous prototype for 'slpc_decode_max_freq' [-Wmissing-prototypes]
     229 | u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
         |     ^~~~~~~~~~~~~~~~~~~~


vim +/slpc_decode_min_freq +217 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c

   216	
 > 217	u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
   218	{
   219		struct slpc_shared_data *data = slpc->vaddr;
   220	
   221		GEM_BUG_ON(!slpc->vma);
   222	
   223		return	DIV_ROUND_CLOSEST(
   224			REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
   225				data->task_state_data.freq) *
   226			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   227	}
   228	
 > 229	u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
   230	{
   231		struct slpc_shared_data *data = slpc->vaddr;
   232	
   233		GEM_BUG_ON(!slpc->vma);
   234	
   235		return	DIV_ROUND_CLOSEST(
   236			REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
   237				data->task_state_data.freq) *
   238			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   239	}
   240	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
kernel test robot July 22, 2021, 6:07 p.m. UTC | #4 
Hi Vinay,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210722]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/14352081e4f18759e70413f3be4151d623c97b8c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
        git checkout 14352081e4f18759e70413f3be4151d623c97b8c
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/i915/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:217:5: sparse: sparse: symbol 'slpc_decode_min_freq' was not declared. Should it be static?
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:229:5: sparse: sparse: symbol 'slpc_decode_max_freq' was not declared. Should it be static?

Please review and possibly fold the followup patch.

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
kernel test robot July 23, 2021, 1:04 p.m. UTC | #5 
Hi Vinay,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210723]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/14352081e4f18759e70413f3be4151d623c97b8c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
        git checkout 14352081e4f18759e70413f3be4151d623c97b8c
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/i915/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:217:5: sparse: sparse: symbol 'slpc_decode_min_freq' was not declared. Should it be static?
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:229:5: sparse: sparse: symbol 'slpc_decode_max_freq' was not declared. Should it be static?

vim +/slpc_decode_min_freq +217 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c

   216	
 > 217	u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
   218	{
   219		struct slpc_shared_data *data = slpc->vaddr;
   220	
   221		GEM_BUG_ON(!slpc->vma);
   222	
   223		return	DIV_ROUND_CLOSEST(
   224			REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
   225				data->task_state_data.freq) *
   226			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   227	}
   228	
 > 229	u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
   230	{
   231		struct slpc_shared_data *data = slpc->vaddr;
   232	
   233		GEM_BUG_ON(!slpc->vma);
   234	
   235		return	DIV_ROUND_CLOSEST(
   236			REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
   237				data->task_state_data.freq) *
   238			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   239	}
   240	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
Vinay Belgaumkar July 23, 2021, 7:28 p.m. UTC | #6 
On 7/21/2021 10:38 AM, Michal Wajdeczko wrote:
> 
> 
> On 21.07.2021 18:11, Vinay Belgaumkar wrote:
>> Add methods for interacting with GuC for enabling SLPC. Enable
>> SLPC after GuC submission has been established. GuC load will
>> fail if SLPC cannot be successfully initialized. Add various
>> helper methods to set/unset the parameters for SLPC. They can
>> be set using H2G calls or directly setting bits in the shared
>> data structure.
>>
>> This patch also removes the GEM_BUG_ON from guc_submission_disable().
>> The assumption when that was added was there would be no wakerefs
>> when it would be called. However, if we fail to enable slpc, we will
> 
> s/slpc/SLPC

done.
> 
>> still be holding a wakeref.
>>
>> v2: Address several review comments, add new helpers for
>> decoding the slpc min/max frequencies. Use masks instead of hardcoded
>> constants. (Michal W)
>>
>> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
>> Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan@intel.com>
>> ---
>>   drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c   | 206 ++++++++++++++++++
>>   .../gpu/drm/i915/gt/uc/intel_guc_slpc_types.h |   2 +
>>   .../gpu/drm/i915/gt/uc/intel_guc_submission.c |   4 -
>>   drivers/gpu/drm/i915/gt/uc/intel_uc.c         |  10 +
>>   4 files changed, 218 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> index a99d727b5bf0..48db2a8f67d1 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> @@ -45,6 +45,40 @@ void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc)
>>   	guc->slpc_selected = __guc_slpc_selected(guc);
>>   }
>>   
>> +static void slpc_mem_set_param(struct slpc_shared_data *data,
>> +				u32 id, u32 value)
>> +{
>> +	GEM_BUG_ON(id >= SLPC_MAX_OVERRIDE_PARAMETERS);
>> +	/*
>> +	 * When the flag bit is set, corresponding value will be read
>> +	 * and applied by slpc.
>> +	 */
>> +	data->override_params.bits[id >> 5] |= (1 << (id % 32));
>> +	data->override_params.values[id] = value;
>> +}
>> +
>> +static void slpc_mem_set_enabled(struct slpc_shared_data *data,
>> +				u8 enable_id, u8 disable_id)
>> +{
>> +	/*
>> +	 * Enabling a param involves setting the enable_id
>> +	 * to 1 and disable_id to 0.
>> +	 */
>> +	slpc_mem_set_param(data, enable_id, 1);
>> +	slpc_mem_set_param(data, disable_id, 0);
>> +}
>> +
>> +static void slpc_mem_set_disabled(struct slpc_shared_data *data,
>> +				u8 enable_id, u8 disable_id)
>> +{
>> +	/*
>> +	 * Disabling a param involves setting the enable_id
>> +	 * to 0 and disable_id to 1.
>> +	 */
>> +	slpc_mem_set_param(data, disable_id, 1);
>> +	slpc_mem_set_param(data, enable_id, 0);
>> +}
>> +
>>   static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
>>   {
>>   	struct intel_guc *guc = slpc_to_guc(slpc);
>> @@ -63,6 +97,116 @@ static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
>>   	return err;
>>   }
>>   
>> +static u32 slpc_get_state(struct intel_guc_slpc *slpc)
>> +{
>> +	struct slpc_shared_data *data;
>> +
>> +	GEM_BUG_ON(!slpc->vma);
>> +
>> +	drm_clflush_virt_range(slpc->vaddr, sizeof(u32));
>> +	data = slpc->vaddr;
>> +
>> +	return data->header.global_state;
>> +}
>> +
>> +static bool slpc_is_running(struct intel_guc_slpc *slpc)
>> +{
>> +	return (slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING);
>> +}
>> +
>> +static int guc_action_slpc_query(struct intel_guc *guc, u32 offset)
>> +{
>> +	u32 request[] = {
>> +		INTEL_GUC_ACTION_SLPC_REQUEST,
>> + 		SLPC_EVENT(SLPC_EVENT_QUERY_TASK_STATE, 2),
>> +		offset,
>> +		0,
>> +	};
>> +
>> + 	return intel_guc_send(guc, request, ARRAY_SIZE(request));
>> +}
>> +
>> +static int slpc_query_task_state(struct intel_guc_slpc *slpc)
>> +{
>> +	struct intel_guc *guc = slpc_to_guc(slpc);
>> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
>> +	u32 shared_data_gtt_offset = intel_guc_ggtt_offset(guc, slpc->vma);
>> +	int ret;
>> +
>> +	ret = guc_action_slpc_query(guc, shared_data_gtt_offset);
>> +	if (ret)
>> +		drm_err(&i915->drm, "Query task state data returned (%pe)\n",
>> +				ERR_PTR(ret));
>> +
>> +	drm_clflush_virt_range(slpc->vaddr, SLPC_PAGE_SIZE_BYTES);
>> +
>> +	return ret;
>> +}
>> +
>> +static const char *slpc_state_string(struct intel_guc_slpc *slpc)
>> +{
>> +	const char *str = NULL;
>> +	u32 state = slpc_get_state(slpc);
>> +
>> +	switch (state) {
>> +	case SLPC_GLOBAL_STATE_NOT_RUNNING:
>> +		str = "not running";
>> +		break;
>> +	case SLPC_GLOBAL_STATE_INITIALIZING:
>> +		str = "initializing";
>> +		break;
>> +	case SLPC_GLOBAL_STATE_RESETTING:
>> +		str = "resetting";
>> +		break;
>> +	case SLPC_GLOBAL_STATE_RUNNING:
>> +		str = "running";
>> +		break;
>> +	case SLPC_GLOBAL_STATE_SHUTTING_DOWN:
>> +		str = "shutting down";
>> +		break;
>> +	case SLPC_GLOBAL_STATE_ERROR:
>> +		str = "error";
>> +		break;
>> +	default:
>> +		str = "unknown";
>> +		break;
>> +	}
> 
> nit: you can split as:
> 
> static const char *
> slpc_global_state_to_string(enum slpc_global_state state)
> {
> 	switch (state) {
> 	case SLPC_GLOBAL_STATE_NOT_RUNNING:
> 		return "not running";
> 	case SLPC_GLOBAL_STATE_INITIALIZING:
> 		return "initializing";
> 	...
> 
> and
> 
> static const char *slpc_get_state_string(struct intel_guc_slpc *slpc)
> {
> 	return slpc_global_state_to_string(slpc_get_state(slpc));
> }

Ok, done.

> 
> 
>> +
>> +	return str;
>> +}
>> +
>> +static int guc_action_slpc_reset(struct intel_guc *guc, u32 offset)
>> +{
>> +	u32 request[] = {
>> +		INTEL_GUC_ACTION_SLPC_REQUEST,
>> +		SLPC_EVENT(SLPC_EVENT_RESET, 2),
>> +		offset,
>> +		0,
>> +	};
>> +
>> + 	return intel_guc_send(guc, request, ARRAY_SIZE(request));
> 
> don't know details of H2G request/response message (btw, maybe you can
> include something in ABI.h) but be aware that guc_send() might return
> non-zero DATA0 so if you don't expect it, return -EPROTO
> 
>> +}
>> +
>> +static int slpc_reset(struct intel_guc_slpc *slpc)
>> +{
>> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
>> +	struct intel_guc *guc = slpc_to_guc(slpc);
>> +	u32 shared_data_gtt_offset = intel_guc_ggtt_offset(guc, slpc->vma);
> 
> just "offset" ?

yup.

> 
>> +	int ret;
>> +
>> +	ret = guc_action_slpc_reset(guc, shared_data_gtt_offset);
>> +
>> +	if (!ret) {
> 
> if (unlikely(ret < 0))
> 	return ret;
> 
>> +		if (wait_for(slpc_is_running(slpc), SLPC_RESET_TIMEOUT_MS)) {
>> +			drm_err(&i915->drm, "SLPC not enabled! State = %s\n",
>> +				  slpc_state_string(slpc));
>> +			return -EIO;
>> +		}
>> +	}
>> +
>> +	return ret;
>> +}
>> +
>>   int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>>   {
>>   	GEM_BUG_ON(slpc->vma);
>> @@ -70,6 +214,30 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>>   	return slpc_shared_data_init(slpc);
>>   }
>>   
>> +u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
>> +{
>> +	struct slpc_shared_data *data = slpc->vaddr;
>> +
>> +	GEM_BUG_ON(!slpc->vma);
>> +
>> +	return	DIV_ROUND_CLOSEST(
>> +		REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
>> +			data->task_state_data.freq) *
>> +		GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
>> +}
>> +
>> +u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
>> +{
>> +	struct slpc_shared_data *data = slpc->vaddr;
>> +
>> +	GEM_BUG_ON(!slpc->vma);
>> +
>> +	return	DIV_ROUND_CLOSEST(
>> +		REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
>> +			data->task_state_data.freq) *
>> +		GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
>> +}
>> +
>>   /*
>>    * intel_guc_slpc_enable() - Start SLPC
>>    * @slpc: pointer to intel_guc_slpc.
>> @@ -85,6 +253,44 @@ int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
>>    */
>>   int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)
>>   {
>> +	struct drm_i915_private *i915 = slpc_to_i915(slpc);
>> +	struct slpc_shared_data *data;
>> +	int ret;
>> +
>> +	GEM_BUG_ON(!slpc->vma);
>> +
>> +	memset(slpc->vaddr, 0, sizeof(struct slpc_shared_data));
>> +
>> +	data = slpc->vaddr;
>> +	data->header.size = sizeof(struct slpc_shared_data);
>> +
>> +	/* Enable only GTPERF task, disable others */
>> +	slpc_mem_set_enabled(data, SLPC_PARAM_TASK_ENABLE_GTPERF,
>> +				SLPC_PARAM_TASK_DISABLE_GTPERF);
>> +
>> +	slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_BALANCER,
>> +				SLPC_PARAM_TASK_DISABLE_BALANCER);
>> +
>> +	slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_DCC,
>> +				SLPC_PARAM_TASK_DISABLE_DCC);
>> +
>> +	ret = slpc_reset(slpc);
>> +	if (ret) {
> 
> if (unlikely(ret < 0)) ?

ok.

> 
>> +		drm_err(&i915->drm, "SLPC Reset event returned (%pe)\n",
>> +				ERR_PTR(ret));
>> +		return ret;
>> +	}
>> +
>> +	drm_info(&i915->drm, "SLPC state: %s\n", slpc_state_string(slpc));
> 
> do we expect here something else than "running" ?
No, changed this to enabled instead, fixes the ordering below as well.

> 
>> +
>> +	slpc_query_task_state(slpc);
>> +
>> +	/* min and max frequency limits being used by SLPC */
>> +	drm_info(&i915->drm, "SLPC min freq: %u Mhz, max is %u Mhz\n",
>> +			slpc_decode_min_freq(slpc),
>> +			slpc_decode_max_freq(slpc));
>> +
>> +
>>   	return 0;
>>   }
>>   
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
>> index 214a449e78f2..c417992b1346 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
>> @@ -9,6 +9,8 @@
>>   #include <linux/types.h>
>>   #include "abi/guc_actions_slpc_abi.h"
>>   
>> +#define SLPC_RESET_TIMEOUT_MS 5
>> +
>>   struct intel_guc_slpc {
>>   
>>   	struct i915_vma *vma;
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
>> index 9083bd4adb22..142e44dc5bf1 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
>> @@ -2506,10 +2506,6 @@ void intel_guc_submission_enable(struct intel_guc *guc)
>>   
>>   void intel_guc_submission_disable(struct intel_guc *guc)
>>   {
>> -	struct intel_gt *gt = guc_to_gt(guc);
>> -
>> -	GEM_BUG_ON(gt->awake); /* GT should be parked first */
>> ->  	/* Note: By the time we're here, GuC may have already been reset */
>>   }
>>   
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
>> index e6bd9406c7b2..3f2aa83c5c45 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
>> @@ -506,6 +506,14 @@ static int __uc_init_hw(struct intel_uc *uc)
>>   		 "submission",
>>   		 enableddisabled(intel_uc_uses_guc_submission(uc)));
>>   
>> +	if (intel_uc_uses_guc_slpc(uc)) {
>> +		ret = intel_guc_slpc_enable(&guc->slpc);
>> +		if (ret)
>> +			goto err_submission;
>> +		drm_info(&i915->drm, "GuC SLPC %s\n",
>> +			 enableddisabled(intel_uc_uses_guc_slpc(uc)));
> 
> there will be (in this order):
> 
> 	"GuC submission enabled\n"
> 	"SLPC state: running\n"
> 	"SLPC min freq: %u Mhz, max is %u Mhz\n"
> 	"GuC SLPC enabled\n"
> 
> is this what you wanted ?

Fixed now.
Thanks,
Vinay.
> 
> Michal
> 
>> +	}
>> +
>>   	if (intel_uc_uses_huc(uc)) {
>>   		drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
>>   			 intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
>> @@ -520,6 +528,8 @@ static int __uc_init_hw(struct intel_uc *uc)
>>   	/*
>>   	 * We've failed to load the firmware :(
>>   	 */
>> +err_submission:
>> +	intel_guc_submission_disable(guc);
>>   err_log_capture:
>>   	__uc_capture_load_err_log(uc);
>>   err_out:
>>
kernel test robot July 24, 2021, 4:30 p.m. UTC | #7 
Hi Vinay,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210723]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: x86_64-rhel-8.3-kselftests (attached as .config)
compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://github.com/0day-ci/linux/commit/14352081e4f18759e70413f3be4151d623c97b8c
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vinay-Belgaumkar/drm-i915-guc-Enable-GuC-based-power-management-features/20210722-001528
        git checkout 14352081e4f18759e70413f3be4151d623c97b8c
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/i915/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:217:5: sparse: sparse: symbol 'slpc_decode_min_freq' was not declared. Should it be static?
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c:229:5: sparse: sparse: symbol 'slpc_decode_max_freq' was not declared. Should it be static?

vim +/slpc_decode_min_freq +217 drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c

   216	
 > 217	u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
   218	{
   219		struct slpc_shared_data *data = slpc->vaddr;
   220	
   221		GEM_BUG_ON(!slpc->vma);
   222	
   223		return	DIV_ROUND_CLOSEST(
   224			REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
   225				data->task_state_data.freq) *
   226			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   227	}
   228	
 > 229	u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
   230	{
   231		struct slpc_shared_data *data = slpc->vaddr;
   232	
   233		GEM_BUG_ON(!slpc->vma);
   234	
   235		return	DIV_ROUND_CLOSEST(
   236			REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
   237				data->task_state_data.freq) *
   238			GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
   239	}
   240	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
index a99d727b5bf0..48db2a8f67d1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
@@ -45,6 +45,40 @@  void intel_guc_slpc_init_early(struct intel_guc_slpc *slpc)
 	guc->slpc_selected = __guc_slpc_selected(guc);
 }
 
+static void slpc_mem_set_param(struct slpc_shared_data *data,
+				u32 id, u32 value)
+{
+	GEM_BUG_ON(id >= SLPC_MAX_OVERRIDE_PARAMETERS);
+	/*
+	 * When the flag bit is set, corresponding value will be read
+	 * and applied by slpc.
+	 */
+	data->override_params.bits[id >> 5] |= (1 << (id % 32));
+	data->override_params.values[id] = value;
+}
+
+static void slpc_mem_set_enabled(struct slpc_shared_data *data,
+				u8 enable_id, u8 disable_id)
+{
+	/*
+	 * Enabling a param involves setting the enable_id
+	 * to 1 and disable_id to 0.
+	 */
+	slpc_mem_set_param(data, enable_id, 1);
+	slpc_mem_set_param(data, disable_id, 0);
+}
+
+static void slpc_mem_set_disabled(struct slpc_shared_data *data,
+				u8 enable_id, u8 disable_id)
+{
+	/*
+	 * Disabling a param involves setting the enable_id
+	 * to 0 and disable_id to 1.
+	 */
+	slpc_mem_set_param(data, disable_id, 1);
+	slpc_mem_set_param(data, enable_id, 0);
+}
+
 static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
 {
 	struct intel_guc *guc = slpc_to_guc(slpc);
@@ -63,6 +97,116 @@  static int slpc_shared_data_init(struct intel_guc_slpc *slpc)
 	return err;
 }
 
+static u32 slpc_get_state(struct intel_guc_slpc *slpc)
+{
+	struct slpc_shared_data *data;
+
+	GEM_BUG_ON(!slpc->vma);
+
+	drm_clflush_virt_range(slpc->vaddr, sizeof(u32));
+	data = slpc->vaddr;
+
+	return data->header.global_state;
+}
+
+static bool slpc_is_running(struct intel_guc_slpc *slpc)
+{
+	return (slpc_get_state(slpc) == SLPC_GLOBAL_STATE_RUNNING);
+}
+
+static int guc_action_slpc_query(struct intel_guc *guc, u32 offset)
+{
+	u32 request[] = {
+		INTEL_GUC_ACTION_SLPC_REQUEST,
+ 		SLPC_EVENT(SLPC_EVENT_QUERY_TASK_STATE, 2),
+		offset,
+		0,
+	};
+
+ 	return intel_guc_send(guc, request, ARRAY_SIZE(request));
+}
+
+static int slpc_query_task_state(struct intel_guc_slpc *slpc)
+{
+	struct intel_guc *guc = slpc_to_guc(slpc);
+	struct drm_i915_private *i915 = slpc_to_i915(slpc);
+	u32 shared_data_gtt_offset = intel_guc_ggtt_offset(guc, slpc->vma);
+	int ret;
+
+	ret = guc_action_slpc_query(guc, shared_data_gtt_offset);
+	if (ret)
+		drm_err(&i915->drm, "Query task state data returned (%pe)\n",
+				ERR_PTR(ret));
+
+	drm_clflush_virt_range(slpc->vaddr, SLPC_PAGE_SIZE_BYTES);
+
+	return ret;
+}
+
+static const char *slpc_state_string(struct intel_guc_slpc *slpc)
+{
+	const char *str = NULL;
+	u32 state = slpc_get_state(slpc);
+
+	switch (state) {
+	case SLPC_GLOBAL_STATE_NOT_RUNNING:
+		str = "not running";
+		break;
+	case SLPC_GLOBAL_STATE_INITIALIZING:
+		str = "initializing";
+		break;
+	case SLPC_GLOBAL_STATE_RESETTING:
+		str = "resetting";
+		break;
+	case SLPC_GLOBAL_STATE_RUNNING:
+		str = "running";
+		break;
+	case SLPC_GLOBAL_STATE_SHUTTING_DOWN:
+		str = "shutting down";
+		break;
+	case SLPC_GLOBAL_STATE_ERROR:
+		str = "error";
+		break;
+	default:
+		str = "unknown";
+		break;
+	}
+
+	return str;
+}
+
+static int guc_action_slpc_reset(struct intel_guc *guc, u32 offset)
+{
+	u32 request[] = {
+		INTEL_GUC_ACTION_SLPC_REQUEST,
+		SLPC_EVENT(SLPC_EVENT_RESET, 2),
+		offset,
+		0,
+	};
+
+ 	return intel_guc_send(guc, request, ARRAY_SIZE(request));
+}
+
+static int slpc_reset(struct intel_guc_slpc *slpc)
+{
+	struct drm_i915_private *i915 = slpc_to_i915(slpc);
+	struct intel_guc *guc = slpc_to_guc(slpc);
+	u32 shared_data_gtt_offset = intel_guc_ggtt_offset(guc, slpc->vma);
+	int ret;
+
+	ret = guc_action_slpc_reset(guc, shared_data_gtt_offset);
+
+	if (!ret) {
+		if (wait_for(slpc_is_running(slpc), SLPC_RESET_TIMEOUT_MS)) {
+			drm_err(&i915->drm, "SLPC not enabled! State = %s\n",
+				  slpc_state_string(slpc));
+			return -EIO;
+		}
+	}
+
+	return ret;
+}
+
 int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
 {
 	GEM_BUG_ON(slpc->vma);
@@ -70,6 +214,30 @@  int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
 	return slpc_shared_data_init(slpc);
 }
 
+u32 slpc_decode_min_freq(struct intel_guc_slpc *slpc)
+{
+	struct slpc_shared_data *data = slpc->vaddr;
+
+	GEM_BUG_ON(!slpc->vma);
+
+	return	DIV_ROUND_CLOSEST(
+		REG_FIELD_GET(SLPC_MIN_UNSLICE_FREQ_MASK,
+			data->task_state_data.freq) *
+		GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
+}
+
+u32 slpc_decode_max_freq(struct intel_guc_slpc *slpc)
+{
+	struct slpc_shared_data *data = slpc->vaddr;
+
+	GEM_BUG_ON(!slpc->vma);
+
+	return	DIV_ROUND_CLOSEST(
+		REG_FIELD_GET(SLPC_MAX_UNSLICE_FREQ_MASK,
+			data->task_state_data.freq) *
+		GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER);
+}
+
 /*
  * intel_guc_slpc_enable() - Start SLPC
  * @slpc: pointer to intel_guc_slpc.
@@ -85,6 +253,44 @@  int intel_guc_slpc_init(struct intel_guc_slpc *slpc)
  */
 int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)
 {
+	struct drm_i915_private *i915 = slpc_to_i915(slpc);
+	struct slpc_shared_data *data;
+	int ret;
+
+	GEM_BUG_ON(!slpc->vma);
+
+	memset(slpc->vaddr, 0, sizeof(struct slpc_shared_data));
+
+	data = slpc->vaddr;
+	data->header.size = sizeof(struct slpc_shared_data);
+
+	/* Enable only GTPERF task, disable others */
+	slpc_mem_set_enabled(data, SLPC_PARAM_TASK_ENABLE_GTPERF,
+				SLPC_PARAM_TASK_DISABLE_GTPERF);
+
+	slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_BALANCER,
+				SLPC_PARAM_TASK_DISABLE_BALANCER);
+
+	slpc_mem_set_disabled(data, SLPC_PARAM_TASK_ENABLE_DCC,
+				SLPC_PARAM_TASK_DISABLE_DCC);
+
+	ret = slpc_reset(slpc);
+	if (ret) {
+		drm_err(&i915->drm, "SLPC Reset event returned (%pe)\n",
+				ERR_PTR(ret));
+		return ret;
+	}
+
+	drm_info(&i915->drm, "SLPC state: %s\n", slpc_state_string(slpc));
+
+	slpc_query_task_state(slpc);
+
+	/* min and max frequency limits being used by SLPC */
+	drm_info(&i915->drm, "SLPC min freq: %u Mhz, max is %u Mhz\n",
+			slpc_decode_min_freq(slpc),
+			slpc_decode_max_freq(slpc));
+
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
index 214a449e78f2..c417992b1346 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc_types.h
@@ -9,6 +9,8 @@ 
 #include <linux/types.h>
 #include "abi/guc_actions_slpc_abi.h"
 
+#define SLPC_RESET_TIMEOUT_MS 5
+
 struct intel_guc_slpc {
 
 	struct i915_vma *vma;
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index 9083bd4adb22..142e44dc5bf1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -2506,10 +2506,6 @@  void intel_guc_submission_enable(struct intel_guc *guc)
 
 void intel_guc_submission_disable(struct intel_guc *guc)
 {
-	struct intel_gt *gt = guc_to_gt(guc);
-
-	GEM_BUG_ON(gt->awake); /* GT should be parked first */
-
 	/* Note: By the time we're here, GuC may have already been reset */
 }
 
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc.c b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
index e6bd9406c7b2..3f2aa83c5c45 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc.c
@@ -506,6 +506,14 @@  static int __uc_init_hw(struct intel_uc *uc)
 		 "submission",
 		 enableddisabled(intel_uc_uses_guc_submission(uc)));
 
+	if (intel_uc_uses_guc_slpc(uc)) {
+		ret = intel_guc_slpc_enable(&guc->slpc);
+		if (ret)
+			goto err_submission;
+		drm_info(&i915->drm, "GuC SLPC %s\n",
+			 enableddisabled(intel_uc_uses_guc_slpc(uc)));
+	}
+
 	if (intel_uc_uses_huc(uc)) {
 		drm_info(&i915->drm, "%s firmware %s version %u.%u %s:%s\n",
 			 intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_HUC),
@@ -520,6 +528,8 @@  static int __uc_init_hw(struct intel_uc *uc)
 	/*
 	 * We've failed to load the firmware :(
 	 */
+err_submission:
+	intel_guc_submission_disable(guc);
 err_log_capture:
 	__uc_capture_load_err_log(uc);
 err_out: