I like the approach.
BR,
Anusha
>-----Original Message-----
>From: Mateo Lozano, Oscar
>Sent: Friday, May 5, 2017 6:23 AM
>To: intel-gfx@lists.freedesktop.org
>Cc: Mateo Lozano, Oscar <oscar.ma...@intel.com>; Srivatsa, Anusha
><anusha.sriva...@intel.com>; Ceraolo Spurio, Daniele
><daniele.ceraolospu...@intel.com>; Chris Wilson <ch...@chris-wilson.co.uk>
>Subject: [PATCH 1/2] drm/i915/guc: Get rid of the enable_guc_loading module
>parameter
>
>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.sriva...@intel.com>
>Cc: Daniele Ceraolo Spurio <daniele.ceraolospu...@intel.com>
>Cc: Chris Wilson <ch...@chris-wilson.co.uk>
>Signed-off-by: Oscar Mateo <oscar.ma...@intel.com>
Acked-by: Anusha Srivatsa <anusha.sriva...@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) {
>+ 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))
>+ DRM_ERROR("No GuC FW known for a platform with
>GuC!\n");
>+ 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);
>+
> 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;
>+ 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);
> 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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