[Intel-gfx] [PATCH 1/2] drm/i915/guc: Get rid of the enable_guc_loading module parameter
Michal Wajdeczko
michal.wajdeczko at intel.com
Thu May 18 17:41:16 UTC 2017
On Fri, May 05, 2017 at 01:23:17PM +0000, Oscar Mateo wrote:
> The decission to enable GuC loading shouldn't be left to the user.
> Provided the HW supports the GuC, there are only two reasons to load it:
>
> - The user has requested GuC submission.
> - We have a HuC firmware available (so we need the GuC to validate it).
>
> We leave the enable_guc_submission parameter untouched ("auto", "never",
> "if supported", "required") but make its behavior a little bit more
> consistent. Also, if not really required, we do not try to fetch any
> firmware.
>
> Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
> ---
> drivers/gpu/drm/i915/i915_debugfs.c | 10 ++++--
> drivers/gpu/drm/i915/i915_drv.c | 2 +-
> drivers/gpu/drm/i915/i915_drv.h | 16 +++++----
> 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 | 6 ----
> drivers/gpu/drm/i915/i915_params.h | 2 --
> drivers/gpu/drm/i915/intel_guc_loader.c | 48 +++++++++++++++++++++++----
> drivers/gpu/drm/i915/intel_huc.c | 5 +--
> drivers/gpu/drm/i915/intel_uc.c | 58 +++++++++------------------------
> drivers/gpu/drm/i915/intel_uc.h | 4 +--
> drivers/gpu/drm/i915/intel_uncore.c | 3 +-
> 13 files changed, 82 insertions(+), 78 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
> index 870c470..e030b41 100644
> --- a/drivers/gpu/drm/i915/i915_debugfs.c
> +++ b/drivers/gpu/drm/i915/i915_debugfs.c
> @@ -2366,8 +2366,10 @@ static int i915_huc_load_status_info(struct seq_file *m, void *data)
> struct drm_i915_private *dev_priv = node_to_i915(m->private);
> struct intel_uc_fw *huc_fw = &dev_priv->huc.fw;
>
> - if (!HAS_HUC_UCODE(dev_priv))
> + if (!HAS_GUC(dev_priv)) {
> + seq_puts(m, "No HuC support in HW\n");
> return 0;
> + }
>
> seq_puts(m, "HuC firmware status:\n");
> seq_printf(m, "\tpath: %s\n", huc_fw->path);
> @@ -2399,8 +2401,10 @@ static int i915_guc_load_status_info(struct seq_file *m, void *data)
> struct intel_uc_fw *guc_fw = &dev_priv->guc.fw;
> u32 tmp, i;
>
> - if (!HAS_GUC_UCODE(dev_priv))
> + if (!HAS_GUC(dev_priv)) {
> + seq_puts(m, "No GuC support in HW\n");
> return 0;
> + }
>
> seq_printf(m, "GuC firmware status:\n");
> seq_printf(m, "\tpath: %s\n",
> @@ -2504,7 +2508,7 @@ static int i915_guc_info(struct seq_file *m, void *data)
>
> if (!guc->execbuf_client) {
> seq_printf(m, "GuC submission %s\n",
> - HAS_GUC_SCHED(dev_priv) ?
> + HAS_GUC(dev_priv) ?
> "disabled" :
> "not supported");
> return 0;
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 72fb47a..006ed91 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -996,7 +996,7 @@ static void intel_sanitize_options(struct drm_i915_private *dev_priv)
> i915.semaphores = intel_sanitize_semaphores(dev_priv, i915.semaphores);
> DRM_DEBUG_DRIVER("use GPU semaphores? %s\n", yesno(i915.semaphores));
>
> - intel_uc_sanitize_options(dev_priv);
> + intel_guc_sanitize_submission(dev_priv);
> }
>
> /**
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index b20ed16..5d00120 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2921,15 +2921,17 @@ static inline struct scatterlist *__sg_next(struct scatterlist *sg)
> #define HAS_RUNTIME_PM(dev_priv) ((dev_priv)->info.has_runtime_pm)
> #define HAS_64BIT_RELOC(dev_priv) ((dev_priv)->info.has_64bit_reloc)
>
> +#define HAS_GUC(dev_priv) ((dev_priv)->info.has_guc)
> +#define HAS_GUC_UCODE(dev_priv) ((dev_priv)->guc.fw.path != NULL)
> +#define HAS_HUC_UCODE(dev_priv) ((dev_priv)->huc.fw.path != NULL)
> +
> /*
> - * For now, anything with a GuC requires uCode loading, and then supports
> - * command submission once loaded. But these are logically independent
> - * properties, so we have separate macros to test them.
> + * Only two things require us to load the GuC firmware: either we want
> + * to enable GuC submission or we need it to to validate a HuC firmware
> */
> -#define HAS_GUC(dev_priv) ((dev_priv)->info.has_guc)
> -#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 NEEDS_GUC_LOADING(dev_priv) \
> + (HAS_GUC(dev_priv) && \
> + (i915.enable_guc_submission || HAS_HUC_UCODE(dev_priv)))
>
> #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 31a73c3..a9f825b 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -237,7 +237,7 @@ 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.enable_guc_loading)
> + if (NEEDS_GUC_LOADING(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 8bab4ae..283d7e5 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -2897,7 +2897,7 @@ 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.enable_guc_loading) {
> + if (NEEDS_GUC_LOADING(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 c99f51c..75cd0a9 100644
> --- a/drivers/gpu/drm/i915/i915_irq.c
> +++ b/drivers/gpu/drm/i915/i915_irq.c
> @@ -4240,7 +4240,7 @@ 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 (NEEDS_GUC_LOADING(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 b6a7e36..f90b7c1 100644
> --- a/drivers/gpu/drm/i915/i915_params.c
> +++ b/drivers/gpu/drm/i915/i915_params.c
> @@ -56,7 +56,6 @@ struct i915_params i915 __read_mostly = {
> .verbose_state_checks = 1,
> .nuclear_pageflip = 0,
> .edp_vswing = 0,
> - .enable_guc_loading = 0,
> .enable_guc_submission = 0,
> .guc_log_level = -1,
> .guc_firmware_path = NULL,
> @@ -218,11 +217,6 @@ struct i915_params i915 __read_mostly = {
> "(0=use value from vbt [default], 1=low power swing(200mV),"
> "2=default swing(400mV))");
>
> -module_param_named_unsafe(enable_guc_loading, i915.enable_guc_loading, int, 0400);
> -MODULE_PARM_DESC(enable_guc_loading,
> - "Enable GuC firmware loading "
> - "(-1=auto, 0=never [default], 1=if available, 2=required)");
> -
> module_param_named_unsafe(enable_guc_submission, i915.enable_guc_submission, int, 0400);
> MODULE_PARM_DESC(enable_guc_submission,
> "Enable GuC submission "
> diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
> index 34148cc..33e12f6 100644
> --- a/drivers/gpu/drm/i915/i915_params.h
> +++ b/drivers/gpu/drm/i915/i915_params.h
> @@ -43,7 +43,6 @@
> func(int, disable_power_well); \
> func(int, enable_ips); \
> func(int, invert_brightness); \
> - func(int, enable_guc_loading); \
> func(int, enable_guc_submission); \
> func(int, guc_log_level); \
> func(char *, guc_firmware_path); \
> @@ -78,4 +77,3 @@ struct i915_params {
> extern struct i915_params i915 __read_mostly;
>
> #endif
> -
> diff --git a/drivers/gpu/drm/i915/intel_guc_loader.c b/drivers/gpu/drm/i915/intel_guc_loader.c
> index d9045b6..762f0f2 100644
> --- a/drivers/gpu/drm/i915/intel_guc_loader.c
> +++ b/drivers/gpu/drm/i915/intel_guc_loader.c
> @@ -375,13 +375,48 @@ int intel_guc_init_hw(struct intel_guc *guc)
> return 0;
> }
>
> +void intel_guc_sanitize_submission(struct drm_i915_private *dev_priv)
> +{
> + /* Verify hardware support */
> + if (!HAS_GUC(dev_priv)) {
> + if (i915.enable_guc_submission > 0)
> + DRM_INFO("Ignoring GuC submission enable, no HW\n");
> + i915.enable_guc_submission = 0;
> + return;
> + }
> +
> + /* Verify firmware support */
> + if (!HAS_GUC_UCODE(dev_priv)) {
> + if (i915.enable_guc_submission == 1) {
Shouldn't we check here against > 0 ?
> + DRM_INFO("Ignoring GuC submission enable, no FW\n");
> + i915.enable_guc_submission = 0;
> + return;
> + }
> +
> + if (i915.enable_guc_submission < 0) {
> + i915.enable_guc_submission = 0;
> + return;
> + }
> +
> + /*
> + * If "required" (> 1), let it continue and we will fail later
> + * due to the lack of firmware
> + */
> + }
> +
> + /*
> + * A negative value means "use platform default" (enabled if we have
> + * survived to get here)
> + */
> + if (i915.enable_guc_submission < 0)
> + i915.enable_guc_submission = 1;
> +}
> +
> /**
> * intel_guc_select_fw() - selects GuC firmware for loading
> * @guc: intel_guc struct
> - *
> - * Return: zero when we know firmware, non-zero in other case
> */
> -int intel_guc_select_fw(struct intel_guc *guc)
> +void intel_guc_select_fw(struct intel_guc *guc)
> {
> struct drm_i915_private *dev_priv = guc_to_i915(guc);
>
> @@ -411,9 +446,8 @@ int intel_guc_select_fw(struct intel_guc *guc)
> guc->fw.major_ver_wanted = GLK_FW_MAJOR;
> guc->fw.minor_ver_wanted = GLK_FW_MINOR;
> } else {
> - DRM_ERROR("No GuC firmware known for platform with GuC!\n");
> - return -ENOENT;
> + if (HAS_GUC(dev_priv))
This check can be done at the very top of this function, or by the caller
> + DRM_ERROR("No GuC FW known for a platform with GuC!\n");
If we use %s then we can share message with the HuC function below:
DRM_ERROR("No FW know for a platform with %s!\n",
intel_uc_fw_type_repr(INTEL_UC_FW_TYPE_GUC));
> + return;
> }
> -
> - return 0;
> }
> diff --git a/drivers/gpu/drm/i915/intel_huc.c b/drivers/gpu/drm/i915/intel_huc.c
> index 88b4cf3..49a6d88 100644
> --- a/drivers/gpu/drm/i915/intel_huc.c
> +++ b/drivers/gpu/drm/i915/intel_huc.c
> @@ -176,7 +176,9 @@ void intel_huc_select_fw(struct intel_huc *huc)
> huc->fw.major_ver_wanted = GLK_HUC_FW_MAJOR;
> huc->fw.minor_ver_wanted = GLK_HUC_FW_MINOR;
> } else {
> - DRM_ERROR("No HuC firmware known for platform with HuC!\n");
> + /* For now, everything with a GuC also has a HuC */
> + if (HAS_GUC(dev_priv))
> + DRM_ERROR("No HuC FW known for a platform with HuC!\n");
> return;
> }
> }
> @@ -275,4 +277,3 @@ void intel_guc_auth_huc(struct drm_i915_private *dev_priv)
> out:
> i915_vma_unpin(vma);
> }
> -
> diff --git a/drivers/gpu/drm/i915/intel_uc.c b/drivers/gpu/drm/i915/intel_uc.c
> index 7fd75ca..2f1f79b 100644
> --- a/drivers/gpu/drm/i915/intel_uc.c
> +++ b/drivers/gpu/drm/i915/intel_uc.c
> @@ -60,44 +60,13 @@ static int __intel_uc_reset_hw(struct drm_i915_private *dev_priv)
> return ret;
> }
>
> -void intel_uc_sanitize_options(struct drm_i915_private *dev_priv)
> -{
> - if (!HAS_GUC(dev_priv)) {
> - if (i915.enable_guc_loading > 0 ||
> - i915.enable_guc_submission > 0)
> - DRM_INFO("Ignoring GuC options, no hardware\n");
> -
> - i915.enable_guc_loading = 0;
> - i915.enable_guc_submission = 0;
> - return;
> - }
> -
> - /* A negative value means "use platform default" */
> - if (i915.enable_guc_loading < 0)
> - i915.enable_guc_loading = HAS_GUC_UCODE(dev_priv);
> -
> - /* Verify firmware version */
> - if (i915.enable_guc_loading) {
> - if (HAS_HUC_UCODE(dev_priv))
> - intel_huc_select_fw(&dev_priv->huc);
> -
> - if (intel_guc_select_fw(&dev_priv->guc))
> - i915.enable_guc_loading = 0;
> - }
> -
> - /* Can't enable guc submission without guc loaded */
> - if (!i915.enable_guc_loading)
> - i915.enable_guc_submission = 0;
> -
> - /* A negative value means "use platform default" */
> - if (i915.enable_guc_submission < 0)
> - i915.enable_guc_submission = HAS_GUC_SCHED(dev_priv);
> -}
> -
> void intel_uc_init_early(struct drm_i915_private *dev_priv)
> {
> struct intel_guc *guc = &dev_priv->guc;
>
> + intel_guc_select_fw(&dev_priv->guc);
> + intel_huc_select_fw(&dev_priv->huc);
> +
Wrap above inside "if (HAS_GUC(dev_priv))" ?
> mutex_init(&guc->send_mutex);
> guc->send = intel_guc_send_nop;
> }
> @@ -242,6 +211,9 @@ static void fetch_uc_fw(struct drm_i915_private *dev_priv,
>
> void intel_uc_init_fw(struct drm_i915_private *dev_priv)
> {
> + if (!HAS_GUC(dev_priv))
> + return;
> +
> fetch_uc_fw(dev_priv, &dev_priv->huc.fw);
> fetch_uc_fw(dev_priv, &dev_priv->guc.fw);
> }
> @@ -269,7 +241,7 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
> struct intel_guc *guc = &dev_priv->guc;
> int ret, attempts;
>
> - if (!i915.enable_guc_loading)
> + if (!NEEDS_GUC_LOADING(dev_priv))
> return 0;
>
> guc_disable_communication(guc);
> @@ -357,22 +329,22 @@ int intel_uc_init_hw(struct drm_i915_private *dev_priv)
> i915_ggtt_disable_guc(dev_priv);
>
> DRM_ERROR("GuC init failed\n");
> - if (i915.enable_guc_loading > 1 || i915.enable_guc_submission > 1)
> + if (i915.enable_guc_submission > 1) {
> + DRM_NOTE("GuC is required, so marking the GPU as wedged\n");
> ret = -EIO;
> - else
> - ret = 0;
> -
> - if (i915.enable_guc_submission) {
> - i915.enable_guc_submission = 0;
> + } else if (i915.enable_guc_submission == 1) {
> DRM_NOTE("Falling back from GuC submission to execlist mode\n");
> - }
> + i915.enable_guc_submission = 0;
Btw, I'm not sure that it is ok to change params outside of the sanitize function
> + ret = 0;
> + } else
> + ret = 0;
>
> return ret;
> }
>
> void intel_uc_fini_hw(struct drm_i915_private *dev_priv)
> {
> - if (!i915.enable_guc_loading)
> + if (!NEEDS_GUC_LOADING(dev_priv))
> return;
>
> if (i915.enable_guc_submission) {
> diff --git a/drivers/gpu/drm/i915/intel_uc.h b/drivers/gpu/drm/i915/intel_uc.h
> index 1e0eecd..2da4845 100644
> --- a/drivers/gpu/drm/i915/intel_uc.h
> +++ b/drivers/gpu/drm/i915/intel_uc.h
> @@ -220,7 +220,6 @@ struct intel_huc {
> };
>
> /* intel_uc.c */
> -void intel_uc_sanitize_options(struct drm_i915_private *dev_priv);
> void intel_uc_init_early(struct drm_i915_private *dev_priv);
> void intel_uc_init_fw(struct drm_i915_private *dev_priv);
> void intel_uc_fini_fw(struct drm_i915_private *dev_priv);
> @@ -235,13 +234,14 @@ static inline int intel_guc_send(struct intel_guc *guc, const u32 *action, u32 l
> }
>
> /* intel_guc_loader.c */
> -int intel_guc_select_fw(struct intel_guc *guc);
> +void intel_guc_select_fw(struct intel_guc *guc);
> int intel_guc_init_hw(struct intel_guc *guc);
> int intel_guc_suspend(struct drm_i915_private *dev_priv);
> int intel_guc_resume(struct drm_i915_private *dev_priv);
> u32 intel_guc_wopcm_size(struct drm_i915_private *dev_priv);
>
> /* i915_guc_submission.c */
> +void intel_guc_sanitize_submission(struct drm_i915_private *dev_priv);
For functions with "intel_guc" we are passing guc instead of dev_priv
Regards,
Michal
> int i915_guc_submission_init(struct drm_i915_private *dev_priv);
> int i915_guc_submission_enable(struct drm_i915_private *dev_priv);
> int i915_guc_wq_reserve(struct drm_i915_gem_request *rq);
> diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
> index aa9d306..7084088 100644
> --- a/drivers/gpu/drm/i915/intel_uncore.c
> +++ b/drivers/gpu/drm/i915/intel_uncore.c
> @@ -1762,8 +1762,7 @@ int intel_guc_reset(struct drm_i915_private *dev_priv)
> {
> int ret;
>
> - if (!HAS_GUC(dev_priv))
> - return -EINVAL;
> + GEM_BUG_ON(!HAS_UC(dev_priv));
>
> intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
> ret = gen6_hw_domain_reset(dev_priv, GEN9_GRDOM_GUC);
> --
> 1.9.1
>
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