[PATCH 02/27] drm/i915/guc: Allow flexible number of context ids

From: Matthew Brost <matthew.brost@intel.com>
To: <intel-gfx@lists.freedesktop.org>, <dri-devel@lists.freedesktop.org>
Cc: <daniel.vetter@ffwll.ch>, <tony.ye@intel.com>, <zhengguo.xu@intel.com>
Subject: [PATCH 02/27] drm/i915/guc: Allow flexible number of context ids
Date: Fri, 20 Aug 2021 15:44:21 -0700	[thread overview]
Message-ID: <20210820224446.30620-3-matthew.brost@intel.com> (raw)
In-Reply-To: <20210820224446.30620-1-matthew.brost@intel.com>

Number of available GuC contexts ids might be limited.
Stop referring in code to macro and use variable instead.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc.h            |  4 ++++
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 15 +++++++++------
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 112dd29a63fe..6fd2719d1b75 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -60,6 +60,10 @@ struct intel_guc {
 	spinlock_t contexts_lock;
 	/** @guc_ids: used to allocate new guc_ids */
 	struct ida guc_ids;
+	/** @num_guc_ids: number of guc_ids that can be used */
+	u32 num_guc_ids;
+	/** @max_guc_ids: max number of guc_ids that can be used */
+	u32 max_guc_ids;
 	/**
 	 * @guc_id_list: list of intel_context with valid guc_ids but no refs
 	 */
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 46158d996bf6..8235e49bb347 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -344,7 +344,7 @@ static struct guc_lrc_desc *__get_lrc_desc(struct intel_guc *guc, u32 index)
 {
 	struct guc_lrc_desc *base = guc->lrc_desc_pool_vaddr;
 
-	GEM_BUG_ON(index >= GUC_MAX_LRC_DESCRIPTORS);
+	GEM_BUG_ON(index >= guc->max_guc_ids);
 
 	return &base[index];
 }
@@ -353,7 +353,7 @@ static struct intel_context *__get_context(struct intel_guc *guc, u32 id)
 {
 	struct intel_context *ce = xa_load(&guc->context_lookup, id);
 
-	GEM_BUG_ON(id >= GUC_MAX_LRC_DESCRIPTORS);
+	GEM_BUG_ON(id >= guc->max_guc_ids);
 
 	return ce;
 }
@@ -363,8 +363,7 @@ static int guc_lrc_desc_pool_create(struct intel_guc *guc)
 	u32 size;
 	int ret;
 
-	size = PAGE_ALIGN(sizeof(struct guc_lrc_desc) *
-			  GUC_MAX_LRC_DESCRIPTORS);
+	size = PAGE_ALIGN(sizeof(struct guc_lrc_desc) * guc->max_guc_ids);
 	ret = intel_guc_allocate_and_map_vma(guc, size, &guc->lrc_desc_pool,
 					     (void **)&guc->lrc_desc_pool_vaddr);
 	if (ret)
@@ -1193,7 +1192,7 @@ static void guc_submit_request(struct i915_request *rq)
 static int new_guc_id(struct intel_guc *guc)
 {
 	return ida_simple_get(&guc->guc_ids, 0,
-			      GUC_MAX_LRC_DESCRIPTORS, GFP_KERNEL |
+			      guc->num_guc_ids, GFP_KERNEL |
 			      __GFP_RETRY_MAYFAIL | __GFP_NOWARN);
 }
 
@@ -2704,6 +2703,8 @@ static bool __guc_submission_selected(struct intel_guc *guc)
 
 void intel_guc_submission_init_early(struct intel_guc *guc)
 {
+	guc->max_guc_ids = GUC_MAX_LRC_DESCRIPTORS;
+	guc->num_guc_ids = GUC_MAX_LRC_DESCRIPTORS;
 	guc->submission_supported = __guc_submission_supported(guc);
 	guc->submission_selected = __guc_submission_selected(guc);
 }
@@ -2713,7 +2714,7 @@ g2h_context_lookup(struct intel_guc *guc, u32 desc_idx)
 {
 	struct intel_context *ce;
 
-	if (unlikely(desc_idx >= GUC_MAX_LRC_DESCRIPTORS)) {
+	if (unlikely(desc_idx >= guc->max_guc_ids)) {
 		drm_err(&guc_to_gt(guc)->i915->drm,
 			"Invalid desc_idx %u", desc_idx);
 		return NULL;
@@ -3063,6 +3064,8 @@ void intel_guc_submission_print_info(struct intel_guc *guc,
 
 	drm_printf(p, "GuC Number Outstanding Submission G2H: %u\n",
 		   atomic_read(&guc->outstanding_submission_g2h));
+	drm_printf(p, "GuC Number GuC IDs: %u\n", guc->num_guc_ids);
+	drm_printf(p, "GuC Max GuC IDs: %u\n", guc->max_guc_ids);
 	drm_printf(p, "GuC tasklet count: %u\n\n",
 		   atomic_read(&sched_engine->tasklet.count));
 
-- 
2.32.0

