[Intel-gfx] Fwd: Re: [PATCH v9 2/8] drm/i915/guc : Removing i915_modparams.enable_guc_loading module parameter
Sujaritha
sujaritha.sundaresan at intel.com
Wed Nov 22 18:28:35 UTC 2017
-------- Forwarded Message --------
Subject: Re: [PATCH v9 2/8] drm/i915/guc : Removing
i915_modparams.enable_guc_loading module parameter
Date: Wed, 22 Nov 2017 10:07:23 -0800
From: Sujaritha <sujaritha.sundaresan at intel.com>
To: Michal Wajdeczko <michal.wajdeczko at intel.com>, Sagar Arun Kamble
<sagar.a.kamble at intel.com>
On 11/12/2017 08:21 AM, Michal Wajdeczko wrote:
> On Sat, 11 Nov 2017 01:06:32 +0100, Sujaritha Sundaresan
> <sujaritha.sundaresan at intel.com> wrote:
>
>> We currently have two module parameters that control GuC:
>> "enable_guc_loading" and "enable_guc_submission". Whenever
>> we need submission=1, we also need loading=1.We also need
>> loading=1 when we want to want to verify the HuC, which
>> is every time we have a HuC (but all platforms with HuC
>> have a GuC and viceversa).
>>
>> Also if we have HuC have firmware to be loaded, we need to
>> have GuC to actually load it. So if the user wants to avoid
>> the GuC from getting loaded, they must not have a HuC
>> firmware to be loaded, in addition to not using submission.
>>
>> v2: Clarifying the commit message (Anusha)
>>
>> v3: Unify seq_puts messages, Re-factoring code as per review (Michal)
>>
>> v4: Rebase
>>
>> v5: Separating message unification into a separate patch
>>
>> v6: Re-factoring code (Sagar, Michal)
>> Rebase
>>
>> v7: Applying review comments (Sagar)
>> Rebase
>>
>> v8: Change to NEEDS_GUC_FW (Chris)
>> Applying review comments (Michal)
>> Clarifying commit message (Joonas)
>>
>> v9: Applying review comments (Michal)
>>
>> Suggested by; Oscar Mateo <oscar.mateo at intel.com>
>> Signed-off-by: Sujaritha Sundaresan <sujaritha.sundaresan at intel.com>
>> Cc: Chris Wilson <chris at chris-wilson.co.uk>
>> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
>> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
>> Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
>> Cc: Oscar Mateo <oscar.mateo at intel.com>
>> Cc: Sagar Arun Kamble <sagar.a.kamble at intel.com>
>> ---
>> drivers/gpu/drm/i915/i915_drv.h | 9 +++--
>> drivers/gpu/drm/i915/i915_gem_context.c | 2 +-
>> drivers/gpu/drm/i915/i915_gem_gtt.c | 2 +-
>> drivers/gpu/drm/i915/i915_irq.c | 2 +-
>> drivers/gpu/drm/i915/i915_params.c | 4 ---
>> drivers/gpu/drm/i915/i915_params.h | 1 -
>> drivers/gpu/drm/i915/intel_uc.c | 59
>> ++++++++++++++++------------------
>> 7 files changed, 35 insertions(+), 44 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> b/drivers/gpu/drm/i915/i915_drv.h
>> index c94f34f..798fa8a 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -3219,10 +3219,13 @@ static inline unsigned int
>> i915_sg_segment_size(void)
>> * properties, so we have separate macros to test them.
>> */
>> #define HAS_GUC(dev_priv) ((dev_priv)->info.has_guc)
>> +#define HAS_HUC(dev_priv) (HAS_GUC(dev_priv))
>> #define HAS_GUC_CT(dev_priv) ((dev_priv)->info.has_guc_ct)
>> -#define HAS_GUC_UCODE(dev_priv) (HAS_GUC(dev_priv))
>> -#define HAS_GUC_SCHED(dev_priv) (HAS_GUC(dev_priv))
>> -#define HAS_HUC_UCODE(dev_priv) (HAS_GUC(dev_priv))
>> +#define HAS_GUC_UCODE(dev_priv) ((dev_priv)->guc.fw.path != NULL)
>> +#define HAS_HUC_UCODE(dev_priv) ((dev_priv)->huc.fw.path != NULL)
>
> Btw, can we avoid adding ucode as alias for firmware and just use fw:
>
> #define HAS_GUC_FW(dev_priv) ((dev_priv)->guc.fw.path != NULL)
> #define HAS_HUC_FW(dev_priv) ((dev_priv)->huc.fw.path != NULL)
>
> Also, maybe we should rather rely on fetch status instead of path:
>
> #define HAS_GUC_FW(dev_priv) ((dev_priv)->guc.fw.fetch_status ==
> INTEL_UC_FIRMWARE_SUCCESS)
> #define HAS_HUC_FW(dev_priv) ((dev_priv)->huc.fw.fetch_status ==
> INTEL_UC_FIRMWARE_SUCCESS)
>
>> +
>> +#define NEEDS_GUC_FW(dev_priv) \
>> + (HAS_GUC(dev_priv) && i915_modparams.enable_guc_submission)
>
> With updated earlier macro names, our new macro can be defined as:
>
> #define NEEDS_GUC_LOAD(dev_priv) \
> (HAS_GUC(dev_priv) && \
> HAS_GUC_FW(dev_priv) && \
> ( HAS_HUC_FW(dev_priv) || i915_modparams.enable_guc_submission ) )
>
I will make these macro changes.
>> #define HAS_RESOURCE_STREAMER(dev_priv)
>> ((dev_priv)->info.has_resource_streamer)
>> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c
>> b/drivers/gpu/drm/i915/i915_gem_context.c
>> index c05c3d7..6a819c0 100644
>> --- a/drivers/gpu/drm/i915/i915_gem_context.c
>> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
>> @@ -316,7 +316,7 @@ static u32 default_desc_template(const struct
>> drm_i915_private *i915,
>> * present or not in use we still need a small bias as ring
>> wraparound
>> * at offset 0 sometimes hangs. No idea why.
>> */
>> - if (HAS_GUC(dev_priv) && i915_modparams.enable_guc_loading)
>> + if (NEEDS_GUC_FW(dev_priv))
>> ctx->ggtt_offset_bias = GUC_WOPCM_TOP;
>> else
>> ctx->ggtt_offset_bias = I915_GTT_PAGE_SIZE;
>> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
>> b/drivers/gpu/drm/i915/i915_gem_gtt.c
>> index 1e40eeb..b634edf 100644
>> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
>> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
>> @@ -3476,7 +3476,7 @@ int i915_ggtt_probe_hw(struct drm_i915_private
>> *dev_priv)
>> * currently don't have any bits spare to pass in this upper
>> * restriction!
>> */
>> - if (HAS_GUC(dev_priv) && i915_modparams.enable_guc_loading) {
>> + if (NEEDS_GUC_FW(dev_priv)) {
>> ggtt->base.total = min_t(u64, ggtt->base.total, GUC_GGTT_TOP);
>> ggtt->mappable_end = min(ggtt->mappable_end, ggtt->base.total);
>> }
>> diff --git a/drivers/gpu/drm/i915/i915_irq.c
>> b/drivers/gpu/drm/i915/i915_irq.c
>> index ff00e46..a414bca 100644
>> --- a/drivers/gpu/drm/i915/i915_irq.c
>> +++ b/drivers/gpu/drm/i915/i915_irq.c
>> @@ -4032,7 +4032,7 @@ void intel_irq_init(struct drm_i915_private
>> *dev_priv)
>> for (i = 0; i < MAX_L3_SLICES; ++i)
>> dev_priv->l3_parity.remap_info[i] = NULL;
>> - if (HAS_GUC_SCHED(dev_priv))
>> + if (HAS_GUC(dev_priv))
>> dev_priv->pm_guc_events = GEN9_GUC_TO_HOST_INT_EVENT;
>> /* Let's track the enabled rps events */
>> diff --git a/drivers/gpu/drm/i915/i915_params.c
>> b/drivers/gpu/drm/i915/i915_params.c
>> index b4faeb6..1c25f45 100644
>> --- a/drivers/gpu/drm/i915/i915_params.c
>> +++ b/drivers/gpu/drm/i915/i915_params.c
>> @@ -162,10 +162,6 @@ struct i915_params i915_modparams __read_mostly = {
>> "(0=use value from vbt [default], 1=low power swing(200mV),"
>> "2=default swing(400mV))");
>> -i915_param_named_unsafe(enable_guc_loading, int, 0400,
>> - "Enable GuC firmware loading "
>> - "(-1=auto, 0=never [default], 1=if available, 2=required)");
>> -
>> i915_param_named_unsafe(enable_guc_submission, int, 0400,
>> "Enable GuC submission "
>> "(-1=auto, 0=never [default], 1=if available, 2=required)");
>> diff --git a/drivers/gpu/drm/i915/i915_params.h
>> b/drivers/gpu/drm/i915/i915_params.h
>> index c729226..9e1e231 100644
>> --- a/drivers/gpu/drm/i915/i915_params.h
>> +++ b/drivers/gpu/drm/i915/i915_params.h
>> @@ -44,7 +44,6 @@
>> param(int, disable_power_well, -1) \
>> param(int, enable_ips, 1) \
>> param(int, invert_brightness, 0) \
>> - param(int, enable_guc_loading, 0) \
>> param(int, enable_guc_submission, 0) \
>> param(int, guc_log_level, -1) \
>> param(char *, guc_firmware_path, NULL) \
>> diff --git a/drivers/gpu/drm/i915/intel_uc.c
>> b/drivers/gpu/drm/i915/intel_uc.c
>> index e85b268..648e59c 100644
>> --- a/drivers/gpu/drm/i915/intel_uc.c
>> +++ b/drivers/gpu/drm/i915/intel_uc.c
>> @@ -49,36 +49,35 @@ static int __intel_uc_reset_hw(struct
>> drm_i915_private *dev_priv)
>> void intel_uc_sanitize_options(struct drm_i915_private *dev_priv)
>> {
>> + /* Verify Hardware version */
>> if (!HAS_GUC(dev_priv)) {
>> - if (i915_modparams.enable_guc_loading > 0 ||
>> - i915_modparams.enable_guc_submission > 0)
>> + if (i915_modparams.enable_guc_submission > 0)
>> + DRM_INFO("Ignoring option %s - no hardware",
>> "enable_guc_submission");
>> -
>> - i915_modparams.enable_guc_loading = 0;
>> i915_modparams.enable_guc_submission = 0;
>> return;
>> }
>> - /* A negative value means "use platform default" */
>> - if (i915_modparams.enable_guc_loading < 0)
>> - i915_modparams.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
>> -
>> - /* Verify firmware version */
>> - if (i915_modparams.enable_guc_loading) {
>> - if (HAS_HUC_UCODE(dev_priv))
>> - intel_huc_select_fw(&dev_priv->huc);
>> -
>> - if (intel_guc_fw_select(&dev_priv->guc))
>> - i915_modparams.enable_guc_loading = 0;
>> + /* Verify Firmware version */
>> + if (!HAS_HUC_UCODE(dev_priv)) {
>
> s/HUC/GUC as we rather should check for GuC fw code here
>
>> + if (i915_modparams.enable_guc_submission > 0) {
>> + DRM_INFO("Ignoring option %s - no firmware",
>> "enable_guc_submission");
>> + i915_modparams.enable_guc_submission = 0;
>> + return;
>> + }
>> +
>> + if (i915_modparams.enable_guc_submission < 0) {
>> + i915_modparams.enable_guc_submission = 0;
>> + return;
>> + }
>
> Hmm, maybe we combine both above cases into:
>
> if (!HAS_GUC_UCODE(dev_priv)) {
> if (i915_modparams.enable_guc_submission > 0) {
> DRM_INFO("Ignoring option %s - %s\n",
> "enable_guc_submission",
> HAS_GUC(dev_priv) ?
> "no firmware" : "no hardware");
>
With the new macro definitions as suggested earlier, I should be able to
for FW with the earlier conditions.
>> }
>> - /* Can't enable guc submission without guc loaded */
>> - if (!i915_modparams.enable_guc_loading)
>> - i915_modparams.enable_guc_submission = 0;
>> + /*
>> + * A negative value means "use platform default" (enabled if we
>> have
>> + * survived to get here)
>> + */
>
> Hmm, this comment is little misleading, as we don't have any per
> platform flag
> for enabling GuC submission. For now it will be always enabled or
> disabled...
>
>> - /* A negative value means "use platform default" */
>> - if (i915_modparams.enable_guc_submission < 0)
>> - i915_modparams.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
>> + if (i915_modparams.enable_guc_submission == 1)
>> + i915_modparams.enable_guc_submission = HAS_GUC(dev_priv);
>
> Hmm, HAS_GUC is always 1 at this point, so above looks like NOP
Will do.
>
>> }
>> void intel_uc_init_early(struct drm_i915_private *dev_priv)
>> @@ -154,7 +153,7 @@ int intel_uc_init_hw(struct drm_i915_private
>> *dev_priv)
>> struct intel_guc *guc = &dev_priv->guc;
>> int ret, attempts;
>> - if (!i915_modparams.enable_guc_loading)
>> + if (!NEEDS_GUC_FW(dev_priv))
>> return 0;
>> guc_disable_communication(guc);
>> @@ -250,22 +249,16 @@ int intel_uc_init_hw(struct drm_i915_private
>> *dev_priv)
>> err_guc:
>> i915_ggtt_disable_guc(dev_priv);
>> - if (i915_modparams.enable_guc_loading > 1 ||
>> - i915_modparams.enable_guc_submission > 1) {
>> + if (i915_modparams.enable_guc_submission > 1) {
>> DRM_ERROR("GuC init failed. Firmware loading disabled.\n");
>> ret = -EIO;
>> + } else if (i915_modparams.enable_guc_submission == 1) {
>> + DRM_NOTE("Falling back from GuC submission to execlist
>> mode\n");
>> + ret = 0;
>> } else {
>> - DRM_NOTE("GuC init failed. Firmware loading disabled.\n");
>> ret = 0;
>> }
>> - if (i915_modparams.enable_guc_submission) {
>> - i915_modparams.enable_guc_submission = 0;
>> - DRM_NOTE("Falling back from GuC submission to execlist
>> mode\n");
>> - }
>> -
>> - i915_modparams.enable_guc_loading = 0;
>> -
>> return ret;
>> }
>> @@ -273,7 +266,7 @@ void intel_uc_fini_hw(struct drm_i915_private
>> *dev_priv)
>> {
>> guc_free_load_err_log(&dev_priv->guc);
>> - if (!i915_modparams.enable_guc_loading)
>> + if (!NEEDS_GUC_FW(dev_priv))
>> return;
>> if (i915_modparams.enable_guc_submission)
Thanks for the review,
Regards,
Sujaritha
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