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