[PATCH v9 1/2] lib/xe/xe_query: Get runtime xe device graphics version from GMD_ID

[Xin Wang <x.wang@intel.com>]

This allows IGT to query the exact IP version for xe platforms.

Key changes:
- Add xe_device_ipver field to xe_device structure
- set the graphics versions based on the GMD_ID
- Cache device ipver in global map indexed by devid for efficient lookup
- Implement xe_ipver_cache_lookup() to retrieve cached ipver by devid
- Clean up cached device ipver when xe_device is released

V2:
- add new struct xe_device_ipver to hold the ipver info
- separate cache map to eliminate collision (Roper, Matthew D)
- changed function name to xe_ipver_cache_lookup() to avoid
  confusion (Roper, Matthew D)

V3:
- optimize the coding style. (Summers, Stuart)

Signed-off-by: Xin Wang <x.wang@intel.com>
---
 lib/intel_chipset.h |  6 +++++
 lib/xe/xe_query.c   | 54 ++++++++++++++++++++++++++++++++++++++++++++-
 lib/xe/xe_query.h   |  4 ++++
 3 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/lib/intel_chipset.h b/lib/intel_chipset.h
index cc2225110..424811f7c 100644
--- a/lib/intel_chipset.h
+++ b/lib/intel_chipset.h
@@ -100,6 +100,12 @@ struct intel_device_info {
 	const char *codename;
 };
 
+struct xe_device_ipver {
+	uint32_t devid;
+	uint16_t graphics_ver;
+	uint16_t graphics_rel;
+};
+
 const struct intel_device_info *intel_get_device_info(uint16_t devid) __attribute__((pure));
 
 const struct intel_cmds_info *intel_get_cmds_info(uint16_t devid) __attribute__((pure));
diff --git a/lib/xe/xe_query.c b/lib/xe/xe_query.c
index 981d76948..823a29f2d 100644
--- a/lib/xe/xe_query.c
+++ b/lib/xe/xe_query.c
@@ -210,6 +210,22 @@ static struct xe_device_cache {
 	struct igt_map *map;
 } cache;
 
+static struct xe_ipver_cache {
+	pthread_mutex_t mutex;
+	struct igt_map *map;
+} xe_ipver;
+
+struct xe_device_ipver *xe_ipver_cache_lookup(uint32_t devid)
+{
+	struct xe_device_ipver *ipver;
+
+	pthread_mutex_lock(&xe_ipver.mutex);
+	ipver = igt_map_search(xe_ipver.map, &devid);
+	pthread_mutex_unlock(&xe_ipver.mutex);
+
+	return ipver;
+}
+
 static struct xe_device *find_in_cache_unlocked(int fd)
 {
 	return igt_map_search(cache.map, &fd);
@@ -270,6 +286,24 @@ struct xe_device *xe_device_get(int fd)
 	for (int gt = 0; gt < xe_dev->gt_list->num_gt; gt++)
 		xe_dev->gt_mask |= (1ull << xe_dev->gt_list->gt_list[gt].gt_id);
 
+	/*
+	 * Set graphics_ver and graphics_rel based on the main GT's GMD_ID.
+	 * We should use the hardcoded value for the non-GMD_ID platforms (ip_ver_major == 0)
+	 */
+	xe_dev->ipver.devid = 0;
+	for (int gt = 0; gt < xe_dev->gt_list->num_gt; gt++) {
+		if (xe_dev->gt_list->gt_list[gt].type == DRM_XE_QUERY_GT_TYPE_MAIN &&
+		    xe_dev->gt_list->gt_list[gt].ip_ver_major) {
+			igt_debug("Setting graphics_ver to %u and graphics_rel to %u\n",
+				  xe_dev->gt_list->gt_list[gt].ip_ver_major,
+				  xe_dev->gt_list->gt_list[gt].ip_ver_minor);
+			xe_dev->ipver.graphics_ver = xe_dev->gt_list->gt_list[gt].ip_ver_major;
+			xe_dev->ipver.graphics_rel = xe_dev->gt_list->gt_list[gt].ip_ver_minor;
+			xe_dev->ipver.devid = xe_dev->dev_id;
+			break;
+		}
+	}
+
 	/* Tile IDs may be non-consecutive; keep a mask of valid IDs */
 	for (int gt = 0; gt < xe_dev->gt_list->num_gt; gt++)
 		xe_dev->tile_mask |= (1ull << xe_dev->gt_list->gt_list[gt].tile_id);
@@ -304,6 +338,11 @@ struct xe_device *xe_device_get(int fd)
 	prev = find_in_cache_unlocked(fd);
 	if (!prev) {
 		igt_map_insert(cache.map, &xe_dev->fd, xe_dev);
+		if (xe_dev->ipver.devid) {
+			pthread_mutex_lock(&xe_ipver.mutex);
+			igt_map_insert(xe_ipver.map, &xe_dev->ipver.devid, &xe_dev->ipver);
+			pthread_mutex_unlock(&xe_ipver.mutex);
+		}
 	} else {
 		xe_device_free(xe_dev);
 		xe_dev = prev;
@@ -315,7 +354,15 @@ struct xe_device *xe_device_get(int fd)
 
 static void delete_in_cache(struct igt_map_entry *entry)
 {
-	xe_device_free((struct xe_device *)entry->data);
+	struct xe_device *xe_dev = (struct xe_device *)entry->data;
+
+	if (xe_dev->ipver.devid) {
+		pthread_mutex_lock(&xe_ipver.mutex);
+		igt_map_remove(xe_ipver.map, &xe_dev->ipver.devid, NULL);
+		pthread_mutex_unlock(&xe_ipver.mutex);
+	}
+
+	xe_device_free(xe_dev);
 }
 
 /**
@@ -365,13 +412,18 @@ static void xe_device_destroy_cache(void)
 	pthread_mutex_lock(&cache.cache_mutex);
 	igt_map_destroy(cache.map, delete_in_cache);
 	pthread_mutex_unlock(&cache.cache_mutex);
+	pthread_mutex_lock(&xe_ipver.mutex);
+	igt_map_destroy(xe_ipver.map, NULL);
+	pthread_mutex_unlock(&xe_ipver.mutex);
 }
 
 static void xe_device_cache_init(void)
 {
 	pthread_mutex_init(&cache.cache_mutex, NULL);
+	pthread_mutex_init(&xe_ipver.mutex, NULL);
 	xe_device_destroy_cache();
 	cache.map = igt_map_create(igt_map_hash_32, igt_map_equal_32);
+	xe_ipver.map = igt_map_create(igt_map_hash_32, igt_map_equal_32);
 }
 
 #define xe_dev_FN(_NAME, _FIELD, _TYPE) \
diff --git a/lib/xe/xe_query.h b/lib/xe/xe_query.h
index d7a9f95f9..19690cff3 100644
--- a/lib/xe/xe_query.h
+++ b/lib/xe/xe_query.h
@@ -74,6 +74,9 @@ struct xe_device {
 
 	/** @dev_id: Device id of xe device */
 	uint16_t dev_id;
+
+	/** @ipver: Device ip version */
+	struct xe_device_ipver ipver;
 };
 
 #define xe_for_each_engine(__fd, __hwe) \
@@ -181,6 +184,7 @@ static inline void *xe_query_device(int fd, uint32_t type, uint32_t *size)
 }
 
 struct xe_device *xe_device_get(int fd);
+struct xe_device_ipver *xe_ipver_cache_lookup(uint32_t devid);
 void xe_device_put(int fd);
 
 int xe_query_eu_count(int fd, int gt);
-- 
2.43.0