[RFC PATCH 02/42] drm/i915/guc: Allow flexible number of context ids

[Matthew Brost <matthew.brost@xxxxxxxxx>]

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

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc.h            |  2 ++
 drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 15 ++++++++-------
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index 5d94cf482516..8f4f44f71a39 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -53,6 +53,8 @@ struct intel_guc {
 	 */
 	spinlock_t contexts_lock;
 	struct ida guc_ids;
+	u32 num_guc_ids;
+	u32 max_guc_ids;
 	struct list_head guc_id_list;
 
 	bool submission_supported;
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 259f79dfe7bb..46a149d447e6 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -272,7 +272,7 @@ 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];
 }
@@ -281,7 +281,7 @@ static inline 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;
 }
@@ -291,8 +291,7 @@ 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)
@@ -1060,7 +1059,7 @@ 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);
 }
 
@@ -2529,6 +2528,7 @@ static bool __guc_submission_selected(struct intel_guc *guc)
 
 void intel_guc_submission_init_early(struct intel_guc *guc)
 {
+	guc->max_guc_ids = guc->num_guc_ids = GUC_MAX_LRC_DESCRIPTORS;
 	guc->submission_supported = __guc_submission_supported(guc);
 	guc->submission_selected = __guc_submission_selected(guc);
 }
@@ -2538,7 +2538,7 @@ 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;
@@ -2841,6 +2841,8 @@ 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));
 
@@ -2880,7 +2882,6 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
 {
 	struct intel_context *ce;
 	unsigned long index;
-
 	xa_for_each(&guc->context_lookup, index, ce) {
 		drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id);
 		drm_printf(p, "\tHW Context Desc: 0x%08x\n", ce->lrc.lrca);
-- 
2.28.0