[Intel-gfx] [PATCH 10/16] drm/i915/guc/slpc: Add debugfs for slpc info
Belgaumkar, Vinay
vinay.belgaumkar at intel.com
Tue Jul 20 23:00:22 UTC 2021
On 7/10/2021 11:08 AM, Michal Wajdeczko wrote:
>
>
> On 10.07.2021 03:20, Vinay Belgaumkar wrote:
>> This prints out relevant SLPC info from the SLPC shared structure.
>>
>> We will send a h2g message which forces SLPC to update the
>> shared data structure with latest information before reading it.
>>
>> Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
>> Signed-off-by: Sundaresan Sujaritha <sujaritha.sundaresan at intel.com>
>> ---
>> .../gpu/drm/i915/gt/uc/intel_guc_debugfs.c | 16 ++++++
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c | 53 +++++++++++++++++++
>> drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h | 3 ++
>> 3 files changed, 72 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c
>> index 9a03ff56e654..bef749e54601 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_debugfs.c
>> @@ -12,6 +12,7 @@
>> #include "gt/uc/intel_guc_ct.h"
>> #include "gt/uc/intel_guc_ads.h"
>> #include "gt/uc/intel_guc_submission.h"
>> +#include "gt/uc/intel_guc_slpc.h"
>>
>> static int guc_info_show(struct seq_file *m, void *data)
>> {
>> @@ -50,11 +51,26 @@ static int guc_registered_contexts_show(struct seq_file *m, void *data)
>> }
>> DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_registered_contexts);
>>
>> +static int guc_slpc_info_show(struct seq_file *m, void *unused)
>> +{
>> + struct intel_guc *guc = m->private;
>> + struct intel_guc_slpc *slpc = &guc->slpc;
>> + struct drm_printer p = drm_seq_file_printer(m);
>> +
>> + if (!intel_guc_slpc_is_used(guc))
>> + return -ENODEV;
>> +
>> + return intel_guc_slpc_info(slpc, &p);
>> +}
>> +
>
> other entries don't have empty line here
Removed.
>
>> +DEFINE_GT_DEBUGFS_ATTRIBUTE(guc_slpc_info);
>> +
>> void intel_guc_debugfs_register(struct intel_guc *guc, struct dentry *root)
>> {
>> static const struct debugfs_gt_file files[] = {
>> { "guc_info", &guc_info_fops, NULL },
>> { "guc_registered_contexts", &guc_registered_contexts_fops, NULL },
>> + { "guc_slpc_info", &guc_slpc_info_fops, NULL},
>
> IIRC last field is "eval" where maybe you could add your own to check if
> intel_guc_slpc_is_used() to avoid exposing this info if N/A
ok, added.
>
>> };
>>
>> if (!intel_guc_is_supported(guc))
>> 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 98a283d31734..d179ba14ece6 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.c
>> @@ -432,6 +432,59 @@ int intel_guc_slpc_enable(struct intel_guc_slpc *slpc)
>> return 0;
>> }
>>
>> +int intel_guc_slpc_info(struct intel_guc_slpc *slpc, struct drm_printer *p)
>> +{
>> + struct drm_i915_private *i915 = guc_to_gt(slpc_to_guc(slpc))->i915;
>> + struct slpc_shared_data *data;
>> + struct slpc_platform_info *platform_info;
>> + struct slpc_task_state_data *task_state_data;
>> + intel_wakeref_t wakeref;
>> + int ret = 0;
>> +
>> + wakeref = intel_runtime_pm_get(&i915->runtime_pm);
>> +
>> + if (slpc_read_task_state(slpc)) {
>> + ret = -EIO;
>> + goto done;
>> + }
>> +
>> + GEM_BUG_ON(!slpc->vma);
>> +
>> + drm_clflush_virt_range(slpc->vaddr, sizeof(struct slpc_shared_data));
>
> likely will go away if integrated into slpc_read_task_state
yup.
>
>> + data = slpc->vaddr;
>> +
>> + platform_info = &data->platform_info;
>
> is this used ?
no, removed.
>
>> + task_state_data = &data->task_state_data;
>
> as it looks that you treat these sections separately, then maybe it
> would be cleaner to have:
>
> static void print_global_data(*global_data, *p) {}
> static void print_platform_info(*platform_info, *p) {}
> static void print_task_state_data(*task_state_data, *p) {}
If we make these indivudal functions, we'll need to duplicate a lot
of code - like getting wakeref and reading task state. Better to keep
it all in one function instead. There is no other use case to print them
except for debugfs.
>
>> +
>> + drm_printf(p, "SLPC state: %s\n", slpc_state_stringify(data->global_state));
>> + drm_printf(p, "\tgtperf task active: %d\n",
>> + task_state_data->gtperf_task_active);
>> + drm_printf(p, "\tdcc task active: %d\n",
>> + task_state_data->dcc_task_active);
>> + drm_printf(p, "\tin dcc: %d\n",
>> + task_state_data->in_dcc);
>> + drm_printf(p, "\tfreq switch active: %d\n",
>> + task_state_data->freq_switch_active);
>> + drm_printf(p, "\tibc enabled: %d\n",
>> + task_state_data->ibc_enabled);
>> + drm_printf(p, "\tibc active: %d\n",
>> + task_state_data->ibc_active);
>> + drm_printf(p, "\tpg1 enabled: %s\n",
>> + yesno(task_state_data->pg1_enabled));
>> + drm_printf(p, "\tpg1 active: %s\n",
>> + yesno(task_state_data->pg1_active));
>> + drm_printf(p, "\tmax freq: %dMHz\n",
>> + DIV_ROUND_CLOSEST(data->task_state_data.max_unslice_freq *
>> + GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER));
>> + drm_printf(p, "\tmin freq: %dMHz\n",
>> + DIV_ROUND_CLOSEST(data->task_state_data.min_unslice_freq *
>> + GT_FREQUENCY_MULTIPLIER, GEN9_FREQ_SCALER));
>
> you defined task_state_data but in above 2 you're accessing it from data
Fixed.
Thanks,
Vinay.
>
> Michal
>
>> +
>> +done:
>> + intel_runtime_pm_put(&i915->runtime_pm, wakeref);
>> + return ret;
>> +}
>> +
>> void intel_guc_slpc_fini(struct intel_guc_slpc *slpc)
>> {
>> if (!slpc->vma)
>> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>> index 2cb830cdacb5..cd12c5f19f4b 100644
>> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_slpc.h
>> @@ -10,6 +10,8 @@
>> #include <linux/mutex.h>
>> #include "intel_guc_slpc_fwif.h"
>>
>> +struct drm_printer;
>> +
>> struct intel_guc_slpc {
>> /*Protects access to vma and SLPC actions */
>> struct i915_vma *vma;
>> @@ -38,5 +40,6 @@ int intel_guc_slpc_set_max_freq(struct intel_guc_slpc *slpc, u32 val);
>> int intel_guc_slpc_set_min_freq(struct intel_guc_slpc *slpc, u32 val);
>> int intel_guc_slpc_get_max_freq(struct intel_guc_slpc *slpc, u32 *val);
>> int intel_guc_slpc_get_min_freq(struct intel_guc_slpc *slpc, u32 *val);
>> +int intel_guc_slpc_info(struct intel_guc_slpc *slpc, struct drm_printer *p);
>>
>> #endif
>>
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