diff options
Diffstat (limited to 'drivers/video/omap2/vram.c')
| -rw-r--r-- | drivers/video/omap2/vram.c | 514 |
1 files changed, 0 insertions, 514 deletions
diff --git a/drivers/video/omap2/vram.c b/drivers/video/omap2/vram.c deleted file mode 100644 index f2b15c4a75bc..000000000000 --- a/drivers/video/omap2/vram.c +++ /dev/null @@ -1,514 +0,0 @@ -/* - * VRAM manager for OMAP - * - * Copyright (C) 2009 Nokia Corporation - * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - */ - -/*#define DEBUG*/ - -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/list.h> -#include <linux/slab.h> -#include <linux/seq_file.h> -#include <linux/memblock.h> -#include <linux/completion.h> -#include <linux/debugfs.h> -#include <linux/jiffies.h> -#include <linux/module.h> - -#include <asm/setup.h> - -#include <plat/vram.h> - -#ifdef DEBUG -#define DBG(format, ...) pr_debug("VRAM: " format, ## __VA_ARGS__) -#else -#define DBG(format, ...) -#endif - -/* postponed regions are used to temporarily store region information at boot - * time when we cannot yet allocate the region list */ -#define MAX_POSTPONED_REGIONS 10 - -static bool vram_initialized; -static int postponed_cnt; -static struct { - unsigned long paddr; - size_t size; -} postponed_regions[MAX_POSTPONED_REGIONS]; - -struct vram_alloc { - struct list_head list; - unsigned long paddr; - unsigned pages; -}; - -struct vram_region { - struct list_head list; - struct list_head alloc_list; - unsigned long paddr; - unsigned pages; -}; - -static DEFINE_MUTEX(region_mutex); -static LIST_HEAD(region_list); - -static struct vram_region *omap_vram_create_region(unsigned long paddr, - unsigned pages) -{ - struct vram_region *rm; - - rm = kzalloc(sizeof(*rm), GFP_KERNEL); - - if (rm) { - INIT_LIST_HEAD(&rm->alloc_list); - rm->paddr = paddr; - rm->pages = pages; - } - - return rm; -} - -#if 0 -static void omap_vram_free_region(struct vram_region *vr) -{ - list_del(&vr->list); - kfree(vr); -} -#endif - -static struct vram_alloc *omap_vram_create_allocation(struct vram_region *vr, - unsigned long paddr, unsigned pages) -{ - struct vram_alloc *va; - struct vram_alloc *new; - - new = kzalloc(sizeof(*va), GFP_KERNEL); - - if (!new) - return NULL; - - new->paddr = paddr; - new->pages = pages; - - list_for_each_entry(va, &vr->alloc_list, list) { - if (va->paddr > new->paddr) - break; - } - - list_add_tail(&new->list, &va->list); - - return new; -} - -static void omap_vram_free_allocation(struct vram_alloc *va) -{ - list_del(&va->list); - kfree(va); -} - -int omap_vram_add_region(unsigned long paddr, size_t size) -{ - struct vram_region *rm; - unsigned pages; - - if (vram_initialized) { - DBG("adding region paddr %08lx size %d\n", - paddr, size); - - size &= PAGE_MASK; - pages = size >> PAGE_SHIFT; - - rm = omap_vram_create_region(paddr, pages); - if (rm == NULL) - return -ENOMEM; - - list_add(&rm->list, ®ion_list); - } else { - if (postponed_cnt == MAX_POSTPONED_REGIONS) - return -ENOMEM; - - postponed_regions[postponed_cnt].paddr = paddr; - postponed_regions[postponed_cnt].size = size; - - ++postponed_cnt; - } - return 0; -} - -int omap_vram_free(unsigned long paddr, size_t size) -{ - struct vram_region *rm; - struct vram_alloc *alloc; - unsigned start, end; - - DBG("free mem paddr %08lx size %d\n", paddr, size); - - size = PAGE_ALIGN(size); - - mutex_lock(®ion_mutex); - - list_for_each_entry(rm, ®ion_list, list) { - list_for_each_entry(alloc, &rm->alloc_list, list) { - start = alloc->paddr; - end = alloc->paddr + (alloc->pages >> PAGE_SHIFT); - - if (start >= paddr && end < paddr + size) - goto found; - } - } - - mutex_unlock(®ion_mutex); - return -EINVAL; - -found: - omap_vram_free_allocation(alloc); - - mutex_unlock(®ion_mutex); - return 0; -} -EXPORT_SYMBOL(omap_vram_free); - -static int _omap_vram_reserve(unsigned long paddr, unsigned pages) -{ - struct vram_region *rm; - struct vram_alloc *alloc; - size_t size; - - size = pages << PAGE_SHIFT; - - list_for_each_entry(rm, ®ion_list, list) { - unsigned long start, end; - - DBG("checking region %lx %d\n", rm->paddr, rm->pages); - - start = rm->paddr; - end = start + (rm->pages << PAGE_SHIFT) - 1; - if (start > paddr || end < paddr + size - 1) - continue; - - DBG("block ok, checking allocs\n"); - - list_for_each_entry(alloc, &rm->alloc_list, list) { - end = alloc->paddr - 1; - - if (start <= paddr && end >= paddr + size - 1) - goto found; - - start = alloc->paddr + (alloc->pages << PAGE_SHIFT); - } - - end = rm->paddr + (rm->pages << PAGE_SHIFT) - 1; - - if (!(start <= paddr && end >= paddr + size - 1)) - continue; -found: - DBG("found area start %lx, end %lx\n", start, end); - - if (omap_vram_create_allocation(rm, paddr, pages) == NULL) - return -ENOMEM; - - return 0; - } - - return -ENOMEM; -} - -int omap_vram_reserve(unsigned long paddr, size_t size) -{ - unsigned pages; - int r; - - DBG("reserve mem paddr %08lx size %d\n", paddr, size); - - size = PAGE_ALIGN(size); - pages = size >> PAGE_SHIFT; - - mutex_lock(®ion_mutex); - - r = _omap_vram_reserve(paddr, pages); - - mutex_unlock(®ion_mutex); - - return r; -} -EXPORT_SYMBOL(omap_vram_reserve); - -static int _omap_vram_alloc(unsigned pages, unsigned long *paddr) -{ - struct vram_region *rm; - struct vram_alloc *alloc; - - list_for_each_entry(rm, ®ion_list, list) { - unsigned long start, end; - - DBG("checking region %lx %d\n", rm->paddr, rm->pages); - - start = rm->paddr; - - list_for_each_entry(alloc, &rm->alloc_list, list) { - end = alloc->paddr; - - if (end - start >= pages << PAGE_SHIFT) - goto found; - - start = alloc->paddr + (alloc->pages << PAGE_SHIFT); - } - - end = rm->paddr + (rm->pages << PAGE_SHIFT); -found: - if (end - start < pages << PAGE_SHIFT) - continue; - - DBG("found %lx, end %lx\n", start, end); - - alloc = omap_vram_create_allocation(rm, start, pages); - if (alloc == NULL) - return -ENOMEM; - - *paddr = start; - - return 0; - } - - return -ENOMEM; -} - -int omap_vram_alloc(size_t size, unsigned long *paddr) -{ - unsigned pages; - int r; - - BUG_ON(!size); - - DBG("alloc mem size %d\n", size); - - size = PAGE_ALIGN(size); - pages = size >> PAGE_SHIFT; - - mutex_lock(®ion_mutex); - - r = _omap_vram_alloc(pages, paddr); - - mutex_unlock(®ion_mutex); - - return r; -} -EXPORT_SYMBOL(omap_vram_alloc); - -void omap_vram_get_info(unsigned long *vram, - unsigned long *free_vram, - unsigned long *largest_free_block) -{ - struct vram_region *vr; - struct vram_alloc *va; - - *vram = 0; - *free_vram = 0; - *largest_free_block = 0; - - mutex_lock(®ion_mutex); - - list_for_each_entry(vr, ®ion_list, list) { - unsigned free; - unsigned long pa; - - pa = vr->paddr; - *vram += vr->pages << PAGE_SHIFT; - - list_for_each_entry(va, &vr->alloc_list, list) { - free = va->paddr - pa; - *free_vram += free; - if (free > *largest_free_block) - *largest_free_block = free; - pa = va->paddr + (va->pages << PAGE_SHIFT); - } - - free = vr->paddr + (vr->pages << PAGE_SHIFT) - pa; - *free_vram += free; - if (free > *largest_free_block) - *largest_free_block = free; - } - - mutex_unlock(®ion_mutex); -} -EXPORT_SYMBOL(omap_vram_get_info); - -#if defined(CONFIG_DEBUG_FS) -static int vram_debug_show(struct seq_file *s, void *unused) -{ - struct vram_region *vr; - struct vram_alloc *va; - unsigned size; - - mutex_lock(®ion_mutex); - - list_for_each_entry(vr, ®ion_list, list) { - size = vr->pages << PAGE_SHIFT; - seq_printf(s, "%08lx-%08lx (%d bytes)\n", - vr->paddr, vr->paddr + size - 1, - size); - - list_for_each_entry(va, &vr->alloc_list, list) { - size = va->pages << PAGE_SHIFT; - seq_printf(s, " %08lx-%08lx (%d bytes)\n", - va->paddr, va->paddr + size - 1, - size); - } - } - - mutex_unlock(®ion_mutex); - - return 0; -} - -static int vram_debug_open(struct inode *inode, struct file *file) -{ - return single_open(file, vram_debug_show, inode->i_private); -} - -static const struct file_operations vram_debug_fops = { - .open = vram_debug_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init omap_vram_create_debugfs(void) -{ - struct dentry *d; - - d = debugfs_create_file("vram", S_IRUGO, NULL, - NULL, &vram_debug_fops); - if (IS_ERR(d)) - return PTR_ERR(d); - - return 0; -} -#endif - -static __init int omap_vram_init(void) -{ - int i; - - vram_initialized = 1; - - for (i = 0; i < postponed_cnt; i++) - omap_vram_add_region(postponed_regions[i].paddr, - postponed_regions[i].size); - -#ifdef CONFIG_DEBUG_FS - if (omap_vram_create_debugfs()) - pr_err("VRAM: Failed to create debugfs file\n"); -#endif - - return 0; -} - -arch_initcall(omap_vram_init); - -/* boottime vram alloc stuff */ - -/* set from board file */ -static u32 omap_vram_sdram_start __initdata; -static u32 omap_vram_sdram_size __initdata; - -/* set from kernel cmdline */ -static u32 omap_vram_def_sdram_size __initdata; -static u32 omap_vram_def_sdram_start __initdata; - -static int __init omap_vram_early_vram(char *p) -{ - omap_vram_def_sdram_size = memparse(p, &p); - if (*p == ',') - omap_vram_def_sdram_start = simple_strtoul(p + 1, &p, 16); - return 0; -} -early_param("vram", omap_vram_early_vram); - -/* - * Called from map_io. We need to call to this early enough so that we - * can reserve the fixed SDRAM regions before VM could get hold of them. - */ -void __init omap_vram_reserve_sdram_memblock(void) -{ - u32 paddr; - u32 size = 0; - - /* cmdline arg overrides the board file definition */ - if (omap_vram_def_sdram_size) { - size = omap_vram_def_sdram_size; - paddr = omap_vram_def_sdram_start; - } - - if (!size) { - size = omap_vram_sdram_size; - paddr = omap_vram_sdram_start; - } - -#ifdef CONFIG_OMAP2_VRAM_SIZE - if (!size) { - size = CONFIG_OMAP2_VRAM_SIZE * 1024 * 1024; - paddr = 0; - } -#endif - - if (!size) - return; - - size = ALIGN(size, SZ_2M); - - if (paddr) { - if (paddr & ~PAGE_MASK) { - pr_err("VRAM start address 0x%08x not page aligned\n", - paddr); - return; - } - - if (!memblock_is_region_memory(paddr, size)) { - pr_err("Illegal SDRAM region 0x%08x..0x%08x for VRAM\n", - paddr, paddr + size - 1); - return; - } - - if (memblock_is_region_reserved(paddr, size)) { - pr_err("FB: failed to reserve VRAM - busy\n"); - return; - } - - if (memblock_reserve(paddr, size) < 0) { - pr_err("FB: failed to reserve VRAM - no memory\n"); - return; - } - } else { - paddr = memblock_alloc(size, SZ_2M); - } - - memblock_free(paddr, size); - memblock_remove(paddr, size); - - omap_vram_add_region(paddr, size); - - pr_info("Reserving %u bytes SDRAM for VRAM\n", size); -} - -void __init omap_vram_set_sdram_vram(u32 size, u32 start) -{ - omap_vram_sdram_start = start; - omap_vram_sdram_size = size; -} |