PD#137165: codec_mm: add cache limited for less memory system.

Change-Id: I12fd55472718bf564e652cdcb29a1af370c1d9ca Signed-off-by: Zhi Zhou <zhi.zhou@amlogic.com>
khadas · Jan 6, 2017 · ca80538 · ca80538
1 parent 8378377
commit ca80538
Showing 1 changed file with 30 additions and 2 deletions.
diff --git a/drivers/amlogic/codec_mm/codec_mm_scatter.c b/drivers/amlogic/codec_mm/codec_mm_scatter.c
@@ -36,6 +36,7 @@
 #include <linux/amlogic/codec_mm/codec_mm_scatter.h>
 #include <linux/workqueue.h>
 #include <linux/delay.h>
+#include <linux/mm.h>
 
 #include "codec_mm_priv.h"
 #include "codec_mm_scatter_priv.h"
@@ -123,6 +124,7 @@ struct codec_mm_scatter_mgt {
 	int try_alloc_in_sys_page_cnt_min;
 	int alloc_from_cma_first;
 	int enable_slot_from_sys;
+	int no_cache_size_M;
 	int support_from_slot_sys;
 	int one_page_cnt;
 	int scatters_cnt;
@@ -1559,7 +1561,7 @@ int codec_mm_scatter_info_dump(void *buf, int size)
 			 (smgt->total_page_num << PAGE_SHIFT) / SZ_1M,
 			 smgt->total_page_num << PAGE_SHIFT,
 			 smgt->total_page_num);
-	n = smgt->alloced_page_num - smgt->cached_pages;
+	n = smgt->alloced_page_num;
 	BUFPRINT("\talloced size:%dM, %d Bypes,pages:%d\n",
 			 (n << PAGE_SHIFT) / SZ_1M,
 			 n << PAGE_SHIFT,
@@ -1570,6 +1572,11 @@ int codec_mm_scatter_info_dump(void *buf, int size)
 	BUFPRINT("\tscatter cached:%d M |%d pages\n",
 		(smgt->cached_pages << PAGE_SHIFT) / SZ_1M,
 		smgt->cached_pages);
+
+	BUFPRINT("\talloc from sys size:%d\n",
+		(smgt->alloc_from_sys_sc_cnt +
+		smgt->one_page_cnt) << PAGE_SHIFT);
+
 	BUFPRINT("\talloc from sys sc cnt:%d\n",
 		smgt->alloc_from_sys_sc_cnt);
 	BUFPRINT("\talloc from sys pages cnt:%d pages\n",
@@ -1862,6 +1869,7 @@ enum config_id {
 	ID3_MAX_SYS_PAGES,
 	ID4_MIN_SYS_PAGES,
 	ID5_SLOT_FROM_SYS,
+	ID6_NO_CACHE_SIZE,
 	IDX_MAX,
 };
 struct sc_configs sc_global_config[] = {
@@ -1871,6 +1879,7 @@ struct sc_configs sc_global_config[] = {
 	{ID3_MAX_SYS_PAGES, "max_sys_pages"},
 	{ID4_MIN_SYS_PAGES, "min_sys_pages"},
 	{ID5_SLOT_FROM_SYS, "enable_slot_from_sys"},
+	{ID6_NO_CACHE_SIZE, "no_cache_size_M"},
 };
 
 static int codec_mm_scatter_mgt_get_config_in(int id)
@@ -1890,6 +1899,8 @@ static int codec_mm_scatter_mgt_get_config_in(int id)
 		return smgt->try_alloc_in_sys_page_cnt_min;
 	case ID5_SLOT_FROM_SYS:
 		return smgt->enable_slot_from_sys;
+	case ID6_NO_CACHE_SIZE:
+		return smgt->no_cache_size_M;
 	default:
 		return 0;
 	}
@@ -1920,6 +1931,9 @@ static int codec_mm_scatter_mgt_set_config_in(int id, int newset)
 		smgt->enable_slot_from_sys = newset;
 		smgt->support_from_slot_sys = newset;
 		break;
+	case ID6_NO_CACHE_SIZE:
+		smgt->no_cache_size_M = newset;
+		break;
 	default:
 		return -1;
 	}
@@ -2021,7 +2035,15 @@ static void codec_mm_scatter_cache_manage(struct codec_mm_scatter_mgt *smgt)
 	int total_free_page = smgt->total_page_num -
 		smgt->alloced_page_num + smgt->cached_pages;
 	if (smgt->delay_free_on > 0 && smgt->keep_size_PAGE > 0) {
-		if ((smgt->cached_pages < smgt->keep_size_PAGE) ||
+		/*if alloc too much ,don't cache any more.*/
+		if (smgt->no_cache_size_M > 0 &&
+			(smgt->cached_pages <= smgt->keep_size_PAGE) &&
+			(smgt->total_page_num >=
+			 (smgt->no_cache_size_M * (SZ_1M >> PAGE_SHIFT)))) {
+			/*have enough pages for most movies.
+			  don't cache more.
+			*/
+		} else if ((smgt->cached_pages < smgt->keep_size_PAGE) ||
 			(smgt->force_cache_on &&/*on star cache*/
 			(smgt->cached_pages < smgt->force_cache_page_cnt))
 		) {/*first 500ms ,alloc double.*/
@@ -2288,6 +2310,12 @@ int codec_mm_scatter_mgt_init(void)
 	scatter_mgt->enable_slot_from_sys = 1;
 	scatter_mgt->support_from_slot_sys =
 		scatter_mgt->enable_slot_from_sys;
+	if ((totalram_pages << PAGE_SHIFT) < 800 * SZ_1M) {
+		/*less memory boards don't cache more,
+		after alloced many pages.*/
+		scatter_mgt->no_cache_size_M = 100;
+	} else
+		scatter_mgt->no_cache_size_M = 0;
 	INIT_LIST_HEAD(&scatter_mgt->free_list);
 	INIT_LIST_HEAD(&scatter_mgt->scatter_list);
 	mutex_init(&scatter_mgt->monitor_lock);