summaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/fonts/fonts.c103
-rw-r--r--lib/scatterlist.c36
-rw-r--r--lib/sg_pool.c39
3 files changed, 98 insertions, 80 deletions
diff --git a/lib/fonts/fonts.c b/lib/fonts/fonts.c
index 9969358a7af5..e7258d8c252b 100644
--- a/lib/fonts/fonts.c
+++ b/lib/fonts/fonts.c
@@ -20,56 +20,42 @@
#endif
#include <linux/font.h>
-#define NO_FONTS
-
static const struct font_desc *fonts[] = {
#ifdef CONFIG_FONT_8x8
-#undef NO_FONTS
- &font_vga_8x8,
+ &font_vga_8x8,
#endif
#ifdef CONFIG_FONT_8x16
-#undef NO_FONTS
- &font_vga_8x16,
+ &font_vga_8x16,
#endif
#ifdef CONFIG_FONT_6x11
-#undef NO_FONTS
- &font_vga_6x11,
+ &font_vga_6x11,
#endif
#ifdef CONFIG_FONT_7x14
-#undef NO_FONTS
- &font_7x14,
+ &font_7x14,
#endif
#ifdef CONFIG_FONT_SUN8x16
-#undef NO_FONTS
- &font_sun_8x16,
+ &font_sun_8x16,
#endif
#ifdef CONFIG_FONT_SUN12x22
-#undef NO_FONTS
- &font_sun_12x22,
+ &font_sun_12x22,
#endif
#ifdef CONFIG_FONT_10x18
-#undef NO_FONTS
- &font_10x18,
+ &font_10x18,
#endif
#ifdef CONFIG_FONT_ACORN_8x8
-#undef NO_FONTS
- &font_acorn_8x8,
+ &font_acorn_8x8,
#endif
#ifdef CONFIG_FONT_PEARL_8x8
-#undef NO_FONTS
- &font_pearl_8x8,
+ &font_pearl_8x8,
#endif
#ifdef CONFIG_FONT_MINI_4x6
-#undef NO_FONTS
- &font_mini_4x6,
+ &font_mini_4x6,
#endif
#ifdef CONFIG_FONT_6x10
-#undef NO_FONTS
- &font_6x10,
+ &font_6x10,
#endif
#ifdef CONFIG_FONT_TER16x32
-#undef NO_FONTS
- &font_ter_16x32,
+ &font_ter_16x32,
#endif
};
@@ -90,16 +76,17 @@ static const struct font_desc *fonts[] = {
* specified font.
*
*/
-
const struct font_desc *find_font(const char *name)
{
- unsigned int i;
+ unsigned int i;
- for (i = 0; i < num_fonts; i++)
- if (!strcmp(fonts[i]->name, name))
- return fonts[i];
- return NULL;
+ BUILD_BUG_ON(!num_fonts);
+ for (i = 0; i < num_fonts; i++)
+ if (!strcmp(fonts[i]->name, name))
+ return fonts[i];
+ return NULL;
}
+EXPORT_SYMBOL(find_font);
/**
@@ -116,44 +103,46 @@ const struct font_desc *find_font(const char *name)
* chosen font.
*
*/
-
const struct font_desc *get_default_font(int xres, int yres, u32 font_w,
u32 font_h)
{
- int i, c, cc;
- const struct font_desc *f, *g;
-
- g = NULL;
- cc = -10000;
- for(i=0; i<num_fonts; i++) {
- f = fonts[i];
- c = f->pref;
+ int i, c, cc, res;
+ const struct font_desc *f, *g;
+
+ g = NULL;
+ cc = -10000;
+ for (i = 0; i < num_fonts; i++) {
+ f = fonts[i];
+ c = f->pref;
#if defined(__mc68000__)
#ifdef CONFIG_FONT_PEARL_8x8
- if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
- c = 100;
+ if (MACH_IS_AMIGA && f->idx == PEARL8x8_IDX)
+ c = 100;
#endif
#ifdef CONFIG_FONT_6x11
- if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
- c = 100;
+ if (MACH_IS_MAC && xres < 640 && f->idx == VGA6x11_IDX)
+ c = 100;
#endif
#endif
- if ((yres < 400) == (f->height <= 8))
- c += 1000;
+ if ((yres < 400) == (f->height <= 8))
+ c += 1000;
+
+ /* prefer a bigger font for high resolution */
+ res = (xres / f->width) * (yres / f->height) / 1000;
+ if (res > 20)
+ c += 20 - res;
- if ((font_w & (1 << (f->width - 1))) &&
- (font_h & (1 << (f->height - 1))))
- c += 1000;
+ if ((font_w & (1 << (f->width - 1))) &&
+ (font_h & (1 << (f->height - 1))))
+ c += 1000;
- if (c > cc) {
- cc = c;
- g = f;
+ if (c > cc) {
+ cc = c;
+ g = f;
+ }
}
- }
- return g;
+ return g;
}
-
-EXPORT_SYMBOL(find_font);
EXPORT_SYMBOL(get_default_font);
MODULE_AUTHOR("James Simmons <jsimmons@users.sf.net>");
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index eacb82468437..c2cf2c311b7d 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -179,7 +179,8 @@ static void sg_kfree(struct scatterlist *sg, unsigned int nents)
* __sg_free_table - Free a previously mapped sg table
* @table: The sg table header to use
* @max_ents: The maximum number of entries per single scatterlist
- * @skip_first_chunk: don't free the (preallocated) first scatterlist chunk
+ * @nents_first_chunk: Number of entries int the (preallocated) first
+ * scatterlist chunk, 0 means no such preallocated first chunk
* @free_fn: Free function
*
* Description:
@@ -189,9 +190,10 @@ static void sg_kfree(struct scatterlist *sg, unsigned int nents)
*
**/
void __sg_free_table(struct sg_table *table, unsigned int max_ents,
- bool skip_first_chunk, sg_free_fn *free_fn)
+ unsigned int nents_first_chunk, sg_free_fn *free_fn)
{
struct scatterlist *sgl, *next;
+ unsigned curr_max_ents = nents_first_chunk ?: max_ents;
if (unlikely(!table->sgl))
return;
@@ -207,9 +209,9 @@ void __sg_free_table(struct sg_table *table, unsigned int max_ents,
* sg_size is then one less than alloc size, since the last
* element is the chain pointer.
*/
- if (alloc_size > max_ents) {
- next = sg_chain_ptr(&sgl[max_ents - 1]);
- alloc_size = max_ents;
+ if (alloc_size > curr_max_ents) {
+ next = sg_chain_ptr(&sgl[curr_max_ents - 1]);
+ alloc_size = curr_max_ents;
sg_size = alloc_size - 1;
} else {
sg_size = alloc_size;
@@ -217,11 +219,12 @@ void __sg_free_table(struct sg_table *table, unsigned int max_ents,
}
table->orig_nents -= sg_size;
- if (skip_first_chunk)
- skip_first_chunk = false;
+ if (nents_first_chunk)
+ nents_first_chunk = 0;
else
free_fn(sgl, alloc_size);
sgl = next;
+ curr_max_ents = max_ents;
}
table->sgl = NULL;
@@ -244,6 +247,8 @@ EXPORT_SYMBOL(sg_free_table);
* @table: The sg table header to use
* @nents: Number of entries in sg list
* @max_ents: The maximum number of entries the allocator returns per call
+ * @nents_first_chunk: Number of entries int the (preallocated) first
+ * scatterlist chunk, 0 means no such preallocated chunk provided by user
* @gfp_mask: GFP allocation mask
* @alloc_fn: Allocator to use
*
@@ -260,10 +265,13 @@ EXPORT_SYMBOL(sg_free_table);
**/
int __sg_alloc_table(struct sg_table *table, unsigned int nents,
unsigned int max_ents, struct scatterlist *first_chunk,
- gfp_t gfp_mask, sg_alloc_fn *alloc_fn)
+ unsigned int nents_first_chunk, gfp_t gfp_mask,
+ sg_alloc_fn *alloc_fn)
{
struct scatterlist *sg, *prv;
unsigned int left;
+ unsigned curr_max_ents = nents_first_chunk ?: max_ents;
+ unsigned prv_max_ents;
memset(table, 0, sizeof(*table));
@@ -279,8 +287,8 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
do {
unsigned int sg_size, alloc_size = left;
- if (alloc_size > max_ents) {
- alloc_size = max_ents;
+ if (alloc_size > curr_max_ents) {
+ alloc_size = curr_max_ents;
sg_size = alloc_size - 1;
} else
sg_size = alloc_size;
@@ -314,7 +322,7 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
* If this is not the first mapping, chain previous part.
*/
if (prv)
- sg_chain(prv, max_ents, sg);
+ sg_chain(prv, prv_max_ents, sg);
else
table->sgl = sg;
@@ -325,6 +333,8 @@ int __sg_alloc_table(struct sg_table *table, unsigned int nents,
sg_mark_end(&sg[sg_size - 1]);
prv = sg;
+ prv_max_ents = curr_max_ents;
+ curr_max_ents = max_ents;
} while (left);
return 0;
@@ -347,9 +357,9 @@ int sg_alloc_table(struct sg_table *table, unsigned int nents, gfp_t gfp_mask)
int ret;
ret = __sg_alloc_table(table, nents, SG_MAX_SINGLE_ALLOC,
- NULL, gfp_mask, sg_kmalloc);
+ NULL, 0, gfp_mask, sg_kmalloc);
if (unlikely(ret))
- __sg_free_table(table, SG_MAX_SINGLE_ALLOC, false, sg_kfree);
+ __sg_free_table(table, SG_MAX_SINGLE_ALLOC, 0, sg_kfree);
return ret;
}
diff --git a/lib/sg_pool.c b/lib/sg_pool.c
index cff20df2695e..db29e5c1f790 100644
--- a/lib/sg_pool.c
+++ b/lib/sg_pool.c
@@ -70,18 +70,27 @@ static struct scatterlist *sg_pool_alloc(unsigned int nents, gfp_t gfp_mask)
/**
* sg_free_table_chained - Free a previously mapped sg table
* @table: The sg table header to use
- * @first_chunk: was first_chunk not NULL in sg_alloc_table_chained?
+ * @nents_first_chunk: size of the first_chunk SGL passed to
+ * sg_alloc_table_chained
*
* Description:
* Free an sg table previously allocated and setup with
* sg_alloc_table_chained().
*
+ * @nents_first_chunk has to be same with that same parameter passed
+ * to sg_alloc_table_chained().
+ *
**/
-void sg_free_table_chained(struct sg_table *table, bool first_chunk)
+void sg_free_table_chained(struct sg_table *table,
+ unsigned nents_first_chunk)
{
- if (first_chunk && table->orig_nents <= SG_CHUNK_SIZE)
+ if (table->orig_nents <= nents_first_chunk)
return;
- __sg_free_table(table, SG_CHUNK_SIZE, first_chunk, sg_pool_free);
+
+ if (nents_first_chunk == 1)
+ nents_first_chunk = 0;
+
+ __sg_free_table(table, SG_CHUNK_SIZE, nents_first_chunk, sg_pool_free);
}
EXPORT_SYMBOL_GPL(sg_free_table_chained);
@@ -90,31 +99,41 @@ EXPORT_SYMBOL_GPL(sg_free_table_chained);
* @table: The sg table header to use
* @nents: Number of entries in sg list
* @first_chunk: first SGL
+ * @nents_first_chunk: number of the SGL of @first_chunk
*
* Description:
* Allocate and chain SGLs in an sg table. If @nents@ is larger than
- * SG_CHUNK_SIZE a chained sg table will be setup.
+ * @nents_first_chunk a chained sg table will be setup. @first_chunk is
+ * ignored if nents_first_chunk <= 1 because user expects the SGL points
+ * non-chain SGL.
*
**/
int sg_alloc_table_chained(struct sg_table *table, int nents,
- struct scatterlist *first_chunk)
+ struct scatterlist *first_chunk, unsigned nents_first_chunk)
{
int ret;
BUG_ON(!nents);
- if (first_chunk) {
- if (nents <= SG_CHUNK_SIZE) {
+ if (first_chunk && nents_first_chunk) {
+ if (nents <= nents_first_chunk) {
table->nents = table->orig_nents = nents;
sg_init_table(table->sgl, nents);
return 0;
}
}
+ /* User supposes that the 1st SGL includes real entry */
+ if (nents_first_chunk <= 1) {
+ first_chunk = NULL;
+ nents_first_chunk = 0;
+ }
+
ret = __sg_alloc_table(table, nents, SG_CHUNK_SIZE,
- first_chunk, GFP_ATOMIC, sg_pool_alloc);
+ first_chunk, nents_first_chunk,
+ GFP_ATOMIC, sg_pool_alloc);
if (unlikely(ret))
- sg_free_table_chained(table, (bool)first_chunk);
+ sg_free_table_chained(table, nents_first_chunk);
return ret;
}
EXPORT_SYMBOL_GPL(sg_alloc_table_chained);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 18:43:01 +0100