drm/mm: Convert to drm_printer

Including all drivers. I thought about keeping small compat functions
to avoid having to change all drivers. But I really like the
drm_printer idea, so figured spreading it more widely is a good thing.

v2: Review from Chris:
- Natural argument order and better name for drm_mm_print.
- show_mm() macro in the selftest.

Cc: Rob Clark <robdclark@gmail.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jyri Sarha <jsarha@ti.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483009764-8281-1-git-send-email-daniel.vetter@ffwll.ch

drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c

@@ -235,9 +235,10 @@ static void amdgpu_gtt_mgr_debug(struct ttm_mem_type_manager *man,
 				  const char *prefix)
 {
 	struct amdgpu_gtt_mgr *mgr = man->priv;
+	struct drm_printer p = drm_debug_printer(prefix);
 
 	spin_lock(&mgr->lock);
-	drm_mm_debug_table(&mgr->mm, prefix);
+	drm_mm_print(&mgr->mm, &p);
 	spin_unlock(&mgr->lock);
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -1482,18 +1482,18 @@ static int amdgpu_mm_dump_table(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	struct amdgpu_device *adev = dev->dev_private;
 	struct drm_mm *mm = (struct drm_mm *)adev->mman.bdev.man[ttm_pl].priv;
-	int ret;
 	struct ttm_bo_global *glob = adev->mman.bdev.glob;
+	struct drm_printer p = drm_seq_file_printer(m);
 
 	spin_lock(&glob->lru_lock);
-	ret = drm_mm_dump_table(m, mm);
+	drm_mm_print(mm, &p);
 	spin_unlock(&glob->lru_lock);
 	if (ttm_pl == TTM_PL_VRAM)
 		seq_printf(m, "man size:%llu pages, ram usage:%lluMB, vis usage:%lluMB\n",
 			   adev->mman.bdev.man[ttm_pl].size,
 			   (u64)atomic64_read(&adev->vram_usage) >> 20,
 			   (u64)atomic64_read(&adev->vram_vis_usage) >> 20);
-	return ret;
+	return 0;
 }
 
 static int ttm_pl_vram = TTM_PL_VRAM;

drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c

@@ -207,9 +207,10 @@ static void amdgpu_vram_mgr_debug(struct ttm_mem_type_manager *man,
 				  const char *prefix)
 {
 	struct amdgpu_vram_mgr *mgr = man->priv;
+	struct drm_printer p = drm_debug_printer(prefix);
 
 	spin_lock(&mgr->lock);
-	drm_mm_debug_table(&mgr->mm, prefix);
+	drm_mm_print(&mgr->mm, &p);
 	spin_unlock(&mgr->lock);
 }
 

drivers/gpu/drm/armada/armada_debugfs.c

@@ -19,13 +19,13 @@ static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
 	struct drm_info_node *node = m->private;
 	struct drm_device *dev = node->minor->dev;
 	struct armada_private *priv = dev->dev_private;
-	int ret;
+	struct drm_printer p = drm_seq_file_printer(m);
 
 	mutex_lock(&priv->linear_lock);
-	ret = drm_mm_dump_table(m, &priv->linear);
+	drm_mm_dump_table(&p, &priv->linear);
 	mutex_unlock(&priv->linear_lock);
 
-	return ret;
+	return 0;
 }
 
 static int armada_debugfs_reg_show(struct seq_file *m, void *data)

drivers/gpu/drm/drm_mm.c

@@ -832,8 +832,7 @@ void drm_mm_takedown(struct drm_mm *mm)
 }
 EXPORT_SYMBOL(drm_mm_takedown);
 
-static u64 drm_mm_debug_hole(const struct drm_mm_node *entry,
-			     const char *prefix)
+static u64 drm_mm_dump_hole(struct drm_printer *p, const struct drm_mm_node *entry)
 {
 	u64 hole_start, hole_end, hole_size;
 
@@ -841,7 +840,7 @@ static u64 drm_mm_debug_hole(const struct drm_mm_node *entry,
 		hole_start = drm_mm_hole_node_start(entry);
 		hole_end = drm_mm_hole_node_end(entry);
 		hole_size = hole_end - hole_start;
-		pr_debug("%s %#llx-%#llx: %llu: free\n", prefix, hole_start,
+		drm_printf(p, "%#018llx-%#018llx: %llu: free\n", hole_start,
 			   hole_end, hole_size);
 		return hole_size;
 	}
@@ -850,70 +849,26 @@ static u64 drm_mm_debug_hole(const struct drm_mm_node *entry,
 }
 
 /**
- * drm_mm_debug_table - dump allocator state to dmesg
- * @mm: drm_mm allocator to dump
- * @prefix: prefix to use for dumping to dmesg
+ * drm_mm_print - print allocator state
+ * @mm: drm_mm allocator to print
+ * @p: DRM printer to use
  */
-void drm_mm_debug_table(const struct drm_mm *mm, const char *prefix)
+void drm_mm_print(const struct drm_mm *mm, struct drm_printer *p)
 {
 	const struct drm_mm_node *entry;
 	u64 total_used = 0, total_free = 0, total = 0;
 
-	total_free += drm_mm_debug_hole(&mm->head_node, prefix);
+	total_free += drm_mm_dump_hole(p, &mm->head_node);
 
 	drm_mm_for_each_node(entry, mm) {
-		pr_debug("%s %#llx-%#llx: %llu: used\n", prefix, entry->start,
+		drm_printf(p, "%#018llx-%#018llx: %llu: used\n", entry->start,
 			   entry->start + entry->size, entry->size);
 		total_used += entry->size;
-		total_free += drm_mm_debug_hole(entry, prefix);
+		total_free += drm_mm_dump_hole(p, entry);
 	}
 	total = total_free + total_used;
 
-	pr_debug("%s total: %llu, used %llu free %llu\n", prefix, total,
+	drm_printf(p, "total: %llu, used %llu free %llu\n", total,
 		   total_used, total_free);
 }
-EXPORT_SYMBOL(drm_mm_debug_table);
-
-#if defined(CONFIG_DEBUG_FS)
-static u64 drm_mm_dump_hole(struct seq_file *m, const struct drm_mm_node *entry)
-{
-	u64 hole_start, hole_end, hole_size;
-
-	if (entry->hole_follows) {
-		hole_start = drm_mm_hole_node_start(entry);
-		hole_end = drm_mm_hole_node_end(entry);
-		hole_size = hole_end - hole_start;
-		seq_printf(m, "%#018llx-%#018llx: %llu: free\n", hole_start,
-			   hole_end, hole_size);
-		return hole_size;
-	}
-
-	return 0;
-}
-
-/**
- * drm_mm_dump_table - dump allocator state to a seq_file
- * @m: seq_file to dump to
- * @mm: drm_mm allocator to dump
- */
-int drm_mm_dump_table(struct seq_file *m, const struct drm_mm *mm)
-{
-	const struct drm_mm_node *entry;
-	u64 total_used = 0, total_free = 0, total = 0;
-
-	total_free += drm_mm_dump_hole(m, &mm->head_node);
-
-	drm_mm_for_each_node(entry, mm) {
-		seq_printf(m, "%#018llx-%#018llx: %llu: used\n", entry->start,
-			   entry->start + entry->size, entry->size);
-		total_used += entry->size;
-		total_free += drm_mm_dump_hole(m, entry);
-	}
-	total = total_free + total_used;
-
-	seq_printf(m, "total: %llu, used %llu free %llu\n", total,
-		   total_used, total_free);
-	return 0;
-}
-EXPORT_SYMBOL(drm_mm_dump_table);
-#endif
+EXPORT_SYMBOL(drm_mm_print);

drivers/gpu/drm/etnaviv/etnaviv_drv.c

@@ -147,21 +147,23 @@ static int etnaviv_gem_show(struct drm_device *dev, struct seq_file *m)
 
 static int etnaviv_mm_show(struct drm_device *dev, struct seq_file *m)
 {
-	int ret;
+	struct drm_printer p = drm_seq_file_printer(m);
 
 	read_lock(&dev->vma_offset_manager->vm_lock);
-	ret = drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
+	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
 	read_unlock(&dev->vma_offset_manager->vm_lock);
 
-	return ret;
+	return 0;
 }
 
 static int etnaviv_mmu_show(struct etnaviv_gpu *gpu, struct seq_file *m)
 {
+	struct drm_printer p = drm_seq_file_printer(m);
+
 	seq_printf(m, "Active Objects (%s):\n", dev_name(gpu->dev));
 
 	mutex_lock(&gpu->mmu->lock);
-	drm_mm_dump_table(m, &gpu->mmu->mm);
+	drm_mm_print(&gpu->mmu->mm, &p);
 	mutex_unlock(&gpu->mmu->lock);
 
 	return 0;

drivers/gpu/drm/msm/msm_debugfs.c

@@ -52,7 +52,11 @@ static int msm_gem_show(struct drm_device *dev, struct seq_file *m)
 
 static int msm_mm_show(struct drm_device *dev, struct seq_file *m)
 {
-	return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
+
+	return 0;
 }
 
 static int msm_fb_show(struct drm_device *dev, struct seq_file *m)

drivers/gpu/drm/omapdrm/omap_debugfs.c

@@ -50,7 +50,11 @@ static int mm_show(struct seq_file *m, void *arg)
 {
 	struct drm_info_node *node = (struct drm_info_node *) m->private;
 	struct drm_device *dev = node->minor->dev;
-	return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
+	struct drm_printer p = drm_seq_file_printer(m);
+
+	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
+
+	return 0;
 }
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION

drivers/gpu/drm/qxl/qxl_ttm.c

@@ -463,13 +463,13 @@ static int qxl_mm_dump_table(struct seq_file *m, void *data)
 	struct drm_mm *mm = (struct drm_mm *)node->info_ent->data;
 	struct drm_device *dev = node->minor->dev;
 	struct qxl_device *rdev = dev->dev_private;
-	int ret;
 	struct ttm_bo_global *glob = rdev->mman.bdev.glob;
+	struct drm_printer p = drm_seq_file_printer(m);
 
 	spin_lock(&glob->lru_lock);
-	ret = drm_mm_dump_table(m, mm);
+	drm_mm_print(mm, &p);
 	spin_unlock(&glob->lru_lock);
-	return ret;
+	return 0;
 }
 #endif
 

drivers/gpu/drm/radeon/radeon_ttm.c

@@ -1033,13 +1033,13 @@ static int radeon_mm_dump_table(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_mm *mm = (struct drm_mm *)rdev->mman.bdev.man[ttm_pl].priv;
-	int ret;
 	struct ttm_bo_global *glob = rdev->mman.bdev.glob;
+	struct drm_printer p = drm_seq_file_printer(m);
 
 	spin_lock(&glob->lru_lock);
-	ret = drm_mm_dump_table(m, mm);
+	drm_mm_print(mm, &p);
 	spin_unlock(&glob->lru_lock);
-	return ret;
+	return 0;
 }
 
 static int ttm_pl_vram = TTM_PL_VRAM;

drivers/gpu/drm/selftests/test-drm_mm.c

@@ -194,6 +194,10 @@ static bool assert_node(struct drm_mm_node *node, struct drm_mm *mm,
 	return ok;
 }
 
+#define show_mm(mm) do { \
+	struct drm_printer __p = drm_debug_printer(__func__); \
+	drm_mm_print((mm), &__p); } while (0)
+
 static int igt_init(void *ignored)
 {
 	const unsigned int size = 4096;
@@ -250,7 +254,7 @@ static int igt_init(void *ignored)
 
 out:
 	if (ret)
-		drm_mm_debug_table(&mm, __func__);
+		show_mm(&mm);
 	drm_mm_takedown(&mm);
 	return ret;
 }
@@ -286,7 +290,7 @@ static int igt_debug(void *ignored)
 		return ret;
 	}
 
-	drm_mm_debug_table(&mm, __func__);
+	show_mm(&mm);
 	return 0;
 }
 
@@ -2031,7 +2035,7 @@ static int igt_color_evict(void *ignored)
 	ret = 0;
 out:
 	if (ret)
-		drm_mm_debug_table(&mm, __func__);
+		show_mm(&mm);
 	drm_mm_for_each_node_safe(node, next, &mm)
 		drm_mm_remove_node(node);
 	drm_mm_takedown(&mm);
@@ -2130,7 +2134,7 @@ static int igt_color_evict_range(void *ignored)
 	ret = 0;
 out:
 	if (ret)
-		drm_mm_debug_table(&mm, __func__);
+		show_mm(&mm);
 	drm_mm_for_each_node_safe(node, next, &mm)
 		drm_mm_remove_node(node);
 	drm_mm_takedown(&mm);

drivers/gpu/drm/tegra/drm.c

@@ -891,8 +891,11 @@ static int tegra_debugfs_iova(struct seq_file *s, void *data)
 	struct drm_info_node *node = (struct drm_info_node *)s->private;
 	struct drm_device *drm = node->minor->dev;
 	struct tegra_drm *tegra = drm->dev_private;
+	struct drm_printer p = drm_seq_file_printer(s);
 
-	return drm_mm_dump_table(s, &tegra->mm);
+	drm_mm_print(&tegra->mm, &p);
+
+	return 0;
 }
 
 static struct drm_info_list tegra_debugfs_list[] = {

drivers/gpu/drm/tilcdc/tilcdc_drv.c

@@ -507,7 +507,9 @@ static int tilcdc_mm_show(struct seq_file *m, void *arg)
 {
 	struct drm_info_node *node = (struct drm_info_node *) m->private;
 	struct drm_device *dev = node->minor->dev;
-	return drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
+	struct drm_printer p = drm_seq_file_printer(m);
+	drm_mm_print(&dev->vma_offset_manager->vm_addr_space_mm, &p);
+	return 0;
 }
 
 static struct drm_info_list tilcdc_debugfs_list[] = {

drivers/gpu/drm/ttm/ttm_bo_manager.c

@@ -141,9 +141,10 @@ static void ttm_bo_man_debug(struct ttm_mem_type_manager *man,
 			     const char *prefix)
 {
 	struct ttm_range_manager *rman = (struct ttm_range_manager *) man->priv;
+	struct drm_printer p = drm_debug_printer(prefix);
 
 	spin_lock(&rman->lock);
-	drm_mm_debug_table(&rman->mm, prefix);
+	drm_mm_print(&rman->mm, &p);
 	spin_unlock(&rman->lock);
 }
 

include/drm/drm_mm.h

@@ -42,12 +42,10 @@
 #include <linux/kernel.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
-#ifdef CONFIG_DEBUG_FS
-#include <linux/seq_file.h>
-#endif
 #ifdef CONFIG_DRM_DEBUG_MM
 #include <linux/stackdepot.h>
 #endif
+#include <drm/drm_print.h>
 
 #ifdef CONFIG_DRM_DEBUG_MM
 #define DRM_MM_BUG_ON(expr) BUG_ON(expr)
@@ -462,9 +460,6 @@ bool drm_mm_scan_remove_block(struct drm_mm_scan *scan,
 			      struct drm_mm_node *node);
 struct drm_mm_node *drm_mm_scan_color_evict(struct drm_mm_scan *scan);
 
-void drm_mm_debug_table(const struct drm_mm *mm, const char *prefix);
-#ifdef CONFIG_DEBUG_FS
-int drm_mm_dump_table(struct seq_file *m, const struct drm_mm *mm);
-#endif
+void drm_mm_print(const struct drm_mm *mm, struct drm_printer *p);
 
 #endif