Commit ba051901 authored by Christian König's avatar Christian König
Browse files

drm/ttm: add a debugfs file for the global page pools 



Instead of printing this on the per device pool.

Signed-off-by: default avatarChristian König <christian.koenig@amd.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/414956/
parent 3763d635

drivers/gpu/drm/ttm/ttm_pool.c

+50 −20
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ 
#include <drm/ttm/ttm_bo_driver.h>

#include <drm/ttm/ttm_tt.h>



#include "ttm_module.h"



/**

 * struct ttm_pool_dma - Helper object for coherent DMA mappings

 *
@@ -543,6 +545,17 @@ static unsigned int ttm_pool_type_count(struct ttm_pool_type *pt) 
	return count;

}



/* Print a nice header for the order */

static void ttm_pool_debugfs_header(struct seq_file *m)

{

	unsigned int i;



	seq_puts(m, "\t ");

	for (i = 0; i < MAX_ORDER; ++i)

		seq_printf(m, " ---%2u---", i);

	seq_puts(m, "\n");

}



/* Dump information about the different pool types */

static void ttm_pool_debugfs_orders(struct ttm_pool_type *pt,

				    struct seq_file *m)
@@ -554,6 +567,35 @@ static void ttm_pool_debugfs_orders(struct ttm_pool_type *pt, 
	seq_puts(m, "\n");

}



/* Dump the total amount of allocated pages */

static void ttm_pool_debugfs_footer(struct seq_file *m)

{

	seq_printf(m, "\ntotal\t: %8lu of %8lu\n",

		   atomic_long_read(&allocated_pages), page_pool_size);

}



/* Dump the information for the global pools */

static int ttm_pool_debugfs_globals_show(struct seq_file *m, void *data)

{

	ttm_pool_debugfs_header(m);



	spin_lock(&shrinker_lock);

	seq_puts(m, "wc\t:");

	ttm_pool_debugfs_orders(global_write_combined, m);

	seq_puts(m, "uc\t:");

	ttm_pool_debugfs_orders(global_uncached, m);

	seq_puts(m, "wc 32\t:");

	ttm_pool_debugfs_orders(global_dma32_write_combined, m);

	seq_puts(m, "uc 32\t:");

	ttm_pool_debugfs_orders(global_dma32_uncached, m);

	spin_unlock(&shrinker_lock);



	ttm_pool_debugfs_footer(m);



	return 0;

}

DEFINE_SHOW_ATTRIBUTE(ttm_pool_debugfs_globals);



/**

 * ttm_pool_debugfs - Debugfs dump function for a pool

 *
@@ -566,23 +608,9 @@ int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m) 
{

	unsigned int i;



	spin_lock(&shrinker_lock);



	seq_puts(m, "\t ");

	for (i = 0; i < MAX_ORDER; ++i)

		seq_printf(m, " ---%2u---", i);

	seq_puts(m, "\n");



	seq_puts(m, "wc\t:");

	ttm_pool_debugfs_orders(global_write_combined, m);

	seq_puts(m, "uc\t:");

	ttm_pool_debugfs_orders(global_uncached, m);



	seq_puts(m, "wc 32\t:");

	ttm_pool_debugfs_orders(global_dma32_write_combined, m);

	seq_puts(m, "uc 32\t:");

	ttm_pool_debugfs_orders(global_dma32_uncached, m);

	ttm_pool_debugfs_header(m);



	spin_lock(&shrinker_lock);

	for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i) {

		seq_puts(m, "DMA ");

		switch (i) {
@@ -598,12 +626,9 @@ int ttm_pool_debugfs(struct ttm_pool *pool, struct seq_file *m) 
		}

		ttm_pool_debugfs_orders(pool->caching[i].orders, m);

	}



	seq_printf(m, "\ntotal\t: %8lu of %8lu\n",

		   atomic_long_read(&allocated_pages), page_pool_size);



	spin_unlock(&shrinker_lock);



	ttm_pool_debugfs_footer(m);

	return 0;

}

EXPORT_SYMBOL(ttm_pool_debugfs);
@@ -660,6 +685,11 @@ int ttm_pool_mgr_init(unsigned long num_pages) 
				   ttm_uncached, i);

	}



#ifdef CONFIG_DEBUG_FS

	debugfs_create_file("page_pool", 0444, ttm_debugfs_root, NULL,

			    &ttm_pool_debugfs_globals_fops);

#endif



	mm_shrinker.count_objects = ttm_pool_shrinker_count;

	mm_shrinker.scan_objects = ttm_pool_shrinker_scan;

	mm_shrinker.seeks = 1;