[Intel-gfx] [PATCH v3] drm/i915/lmem: debugfs for LMEM details

[Ramalingam C]

From: Lukasz Fiedorowicz <lukasz.fiedorow...@intel.com>

Debugfs i915_gem_object is extended to enable the IGTs to
detect the LMEM's availability and the total size of LMEM.

v2: READ_ONCE is used [Chris]
v3: %pa is used for printing the resource [Chris]

Signed-off-by: Lukasz Fiedorowicz <lukasz.fiedorow...@intel.com>
Signed-off-by: Matthew Auld <matthew.a...@intel.com>
Signed-off-by: Stuart Summers <stuart.summ...@intel.com>
Signed-off-by: Ramalingam C <ramalinga...@intel.com>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Reviewed-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_debugfs.c        | 6 +++++-
 drivers/gpu/drm/i915/intel_memory_region.c | 5 ++++-
 drivers/gpu/drm/i915/intel_memory_region.h | 2 ++
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c 
b/drivers/gpu/drm/i915/i915_debugfs.c
index d28468eaed57..af11023b4c8d 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -373,7 +373,11 @@ static int i915_gem_object_info(struct seq_file *m, void 
*data)
                   atomic_read(&i915->mm.free_count),
                   i915->mm.shrink_memory);
 
-       seq_putc(m, '\n');
+       if (HAS_LMEM(i915)) {
+               seq_printf(m, "LMEM total: %pa bytes, available %pa bytes\n",
+                          &i915->mm.regions[INTEL_REGION_LMEM]->total,
+                          &i915->mm.regions[INTEL_REGION_LMEM]->avail);
+       }
 
        print_context_stats(m, i915);
 
diff --git a/drivers/gpu/drm/i915/intel_memory_region.c 
b/drivers/gpu/drm/i915/intel_memory_region.c
index e24c280e5930..15e539de0a82 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/intel_memory_region.c
@@ -37,7 +37,7 @@ __intel_memory_region_put_pages_buddy(struct 
intel_memory_region *mem,
                                      struct list_head *blocks)
 {
        mutex_lock(&mem->mm_lock);
-       intel_memory_region_free_pages(mem, blocks);
+       mem->avail += intel_memory_region_free_pages(mem, blocks);
        mutex_unlock(&mem->mm_lock);
 }
 
@@ -106,6 +106,7 @@ __intel_memory_region_get_pages_buddy(struct 
intel_memory_region *mem,
                        break;
        } while (1);
 
+       mem->avail -= size;
        mutex_unlock(&mem->mm_lock);
        return 0;
 
@@ -164,6 +165,8 @@ intel_memory_region_create(struct drm_i915_private *i915,
        mem->io_start = io_start;
        mem->min_page_size = min_page_size;
        mem->ops = ops;
+       mem->total = size;
+       mem->avail = mem->total;
 
        mutex_init(&mem->objects.lock);
        INIT_LIST_HEAD(&mem->objects.list);
diff --git a/drivers/gpu/drm/i915/intel_memory_region.h 
b/drivers/gpu/drm/i915/intel_memory_region.h
index 238722009677..644ca73d7905 100644
--- a/drivers/gpu/drm/i915/intel_memory_region.h
+++ b/drivers/gpu/drm/i915/intel_memory_region.h
@@ -82,6 +82,8 @@ struct intel_memory_region {
 
        resource_size_t io_start;
        resource_size_t min_page_size;
+       resource_size_t total;
+       resource_size_t avail;
 
        unsigned int type;
        unsigned int instance;
-- 
2.20.1

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