From: Tomi Valkeinen <tomi.valkeinen@nokia.com> To: linux-kernel@vger.kernel.org Cc: linux-omap@vger.kernel.org, linux-fbdev-devel@lists.sourceforge.net, Tomi Valkeinen <tomi.valkeinen@nokia.com> Subject: [PATCH 04/19] OMAP: Add VRAM manager Date: Mon, 9 Nov 2009 13:45:11 +0200 [thread overview] Message-ID: <1257767126-12059-5-git-send-email-tomi.valkeinen@nokia.com> (raw) In-Reply-To: <1257767126-12059-4-git-send-email-tomi.valkeinen@nokia.com> Add a Video RAM manager for OMAP 2 and 3 platforms. VRAM manager is used to allocate large continuous blocks of SDRAM or SRAM. The features VRAM manager has that are missing from dma_alloc_* functions are: - Support for OMAP2's SRAM - Allocate without ioremapping - Allocate at defined physical addresses - Allows larger VRAM area and larger allocations The upcoming DSS2 uses VRAM manager. VRAM area size can be defined in kernel config, board file or with kernel boot parameters. Board file definition overrides kernel config, and boot parameter overrides kernel config and board file. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com> --- arch/arm/mach-omap2/io.c | 2 + arch/arm/plat-omap/include/plat/vram.h | 62 +++ arch/arm/plat-omap/sram.c | 8 + drivers/video/Kconfig | 1 + drivers/video/Makefile | 1 + drivers/video/omap2/Kconfig | 2 + drivers/video/omap2/Makefile | 1 + drivers/video/omap2/vram.c | 655 ++++++++++++++++++++++++++++++++ 8 files changed, 732 insertions(+), 0 deletions(-) create mode 100644 arch/arm/plat-omap/include/plat/vram.h create mode 100644 drivers/video/omap2/Kconfig create mode 100644 drivers/video/omap2/Makefile create mode 100644 drivers/video/omap2/vram.c diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index 9f22c20..6a4d8e4 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -33,6 +33,7 @@ #include <plat/sdrc.h> #include <plat/gpmc.h> #include <plat/serial.h> +#include <plat/vram.h> #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once clkdev is ready */ #include "clock.h" @@ -264,6 +265,7 @@ void __init omap2_map_common_io(void) omap2_check_revision(); omap_sram_init(); omapfb_reserve_sdram(); + omap_vram_reserve_sdram(); } /* diff --git a/arch/arm/plat-omap/include/plat/vram.h b/arch/arm/plat-omap/include/plat/vram.h new file mode 100644 index 0000000..edd4987 --- /dev/null +++ b/arch/arm/plat-omap/include/plat/vram.h @@ -0,0 +1,62 @@ +/* + * 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. + */ + +#ifndef __OMAP_VRAM_H__ +#define __OMAP_VRAM_H__ + +#include <linux/types.h> + +#define OMAP_VRAM_MEMTYPE_SDRAM 0 +#define OMAP_VRAM_MEMTYPE_SRAM 1 +#define OMAP_VRAM_MEMTYPE_MAX 1 + +extern int omap_vram_add_region(unsigned long paddr, size_t size); +extern int omap_vram_free(unsigned long paddr, size_t size); +extern int omap_vram_alloc(int mtype, size_t size, unsigned long *paddr); +extern int omap_vram_reserve(unsigned long paddr, size_t size); +extern void omap_vram_get_info(unsigned long *vram, unsigned long *free_vram, + unsigned long *largest_free_block); + +#ifdef CONFIG_OMAP2_VRAM +extern void omap_vram_set_sdram_vram(u32 size, u32 start); +extern void omap_vram_set_sram_vram(u32 size, u32 start); + +extern void omap_vram_reserve_sdram(void); +extern unsigned long omap_vram_reserve_sram(unsigned long sram_pstart, + unsigned long sram_vstart, + unsigned long sram_size, + unsigned long pstart_avail, + unsigned long size_avail); +#else +static inline void omap_vram_set_sdram_vram(u32 size, u32 start) { } +static inline void omap_vram_set_sram_vram(u32 size, u32 start) { } + +static inline void omap_vram_reserve_sdram(void) { } +static inline unsigned long omap_vram_reserve_sram(unsigned long sram_pstart, + unsigned long sram_vstart, + unsigned long sram_size, + unsigned long pstart_avail, + unsigned long size_avail) +{ + return 0; +} +#endif + +#endif diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c index a53aa85..2f05c78 100644 --- a/arch/arm/plat-omap/sram.c +++ b/arch/arm/plat-omap/sram.c @@ -28,6 +28,7 @@ #include <plat/sram.h> #include <plat/board.h> #include <plat/cpu.h> +#include <plat/vram.h> #include <plat/control.h> @@ -185,6 +186,13 @@ void __init omap_detect_sram(void) omap_sram_start + SRAM_BOOTLOADER_SZ, omap_sram_size - SRAM_BOOTLOADER_SZ); omap_sram_size -= reserved; + + reserved = omap_vram_reserve_sram(omap_sram_start, omap_sram_base, + omap_sram_size, + omap_sram_start + SRAM_BOOTLOADER_SZ, + omap_sram_size - SRAM_BOOTLOADER_SZ); + omap_sram_size -= reserved; + omap_sram_ceil = omap_sram_base + omap_sram_size; } diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 9bbb285..af0448f 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2161,6 +2161,7 @@ config FB_BROADSHEET a bridge adapter. source "drivers/video/omap/Kconfig" +source "drivers/video/omap2/Kconfig" source "drivers/video/backlight/Kconfig" source "drivers/video/display/Kconfig" diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 80232e1..0f8da33 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -124,6 +124,7 @@ obj-$(CONFIG_FB_SM501) += sm501fb.o obj-$(CONFIG_FB_XILINX) += xilinxfb.o obj-$(CONFIG_FB_SH_MOBILE_LCDC) += sh_mobile_lcdcfb.o obj-$(CONFIG_FB_OMAP) += omap/ +obj-y += omap2/ obj-$(CONFIG_XEN_FBDEV_FRONTEND) += xen-fbfront.o obj-$(CONFIG_FB_CARMINE) += carminefb.o obj-$(CONFIG_FB_MB862XX) += mb862xx/ diff --git a/drivers/video/omap2/Kconfig b/drivers/video/omap2/Kconfig new file mode 100644 index 0000000..7a6c4c9 --- /dev/null +++ b/drivers/video/omap2/Kconfig @@ -0,0 +1,2 @@ +config OMAP2_VRAM + bool diff --git a/drivers/video/omap2/Makefile b/drivers/video/omap2/Makefile new file mode 100644 index 0000000..7fdf7bd --- /dev/null +++ b/drivers/video/omap2/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_OMAP2_VRAM) += vram.o diff --git a/drivers/video/omap2/vram.c b/drivers/video/omap2/vram.c new file mode 100644 index 0000000..55a4de5 --- /dev/null +++ b/drivers/video/omap2/vram.c @@ -0,0 +1,655 @@ +/* + * 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/seq_file.h> +#include <linux/bootmem.h> +#include <linux/completion.h> +#include <linux/debugfs.h> +#include <linux/jiffies.h> +#include <linux/module.h> + +#include <asm/setup.h> + +#include <plat/sram.h> +#include <plat/vram.h> +#include <plat/dma.h> + +#ifdef DEBUG +#define DBG(format, ...) pr_debug("VRAM: " format, ## __VA_ARGS__) +#else +#define DBG(format, ...) +#endif + +#define OMAP2_SRAM_START 0x40200000 +/* Maximum size, in reality this is smaller if SRAM is partially locked. */ +#define OMAP2_SRAM_SIZE 0xa0000 /* 640k */ + +/* 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 inline int region_mem_type(unsigned long paddr) +{ + if (paddr >= OMAP2_SRAM_START && + paddr < OMAP2_SRAM_START + OMAP2_SRAM_SIZE) + return OMAP_VRAM_MEMTYPE_SRAM; + else + return OMAP_VRAM_MEMTYPE_SDRAM; +} + +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); + + if (region_mem_type(rm->paddr) != region_mem_type(paddr)) + continue; + + 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 void _omap_vram_dma_cb(int lch, u16 ch_status, void *data) +{ + struct completion *compl = data; + complete(compl); +} + +static int _omap_vram_clear(u32 paddr, unsigned pages) +{ + struct completion compl; + unsigned elem_count; + unsigned frame_count; + int r; + int lch; + + init_completion(&compl); + + r = omap_request_dma(OMAP_DMA_NO_DEVICE, "VRAM DMA", + _omap_vram_dma_cb, + &compl, &lch); + if (r) { + pr_err("VRAM: request_dma failed for memory clear\n"); + return -EBUSY; + } + + elem_count = pages * PAGE_SIZE / 4; + frame_count = 1; + + omap_set_dma_transfer_params(lch, OMAP_DMA_DATA_TYPE_S32, + elem_count, frame_count, + OMAP_DMA_SYNC_ELEMENT, + 0, 0); + + omap_set_dma_dest_params(lch, 0, OMAP_DMA_AMODE_POST_INC, + paddr, 0, 0); + + omap_set_dma_color_mode(lch, OMAP_DMA_CONSTANT_FILL, 0x000000); + + omap_start_dma(lch); + + if (wait_for_completion_timeout(&compl, msecs_to_jiffies(1000)) == 0) { + omap_stop_dma(lch); + pr_err("VRAM: dma timeout while clearing memory\n"); + r = -EIO; + goto err; + } + + r = 0; +err: + omap_free_dma(lch); + + return r; +} + +static int _omap_vram_alloc(int mtype, 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); + + if (region_mem_type(rm->paddr) != mtype) + continue; + + 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; + + _omap_vram_clear(start, pages); + + return 0; + } + + return -ENOMEM; +} + +int omap_vram_alloc(int mtype, size_t size, unsigned long *paddr) +{ + unsigned pages; + int r; + + BUG_ON(mtype > OMAP_VRAM_MEMTYPE_MAX || !size); + + DBG("alloc mem type %d size %d\n", mtype, size); + + size = PAGE_ALIGN(size); + pages = size >> PAGE_SHIFT; + + mutex_lock(®ion_mutex); + + r = _omap_vram_alloc(mtype, 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_sram_start __initdata; +static u32 omap_vram_sram_size __initdata; + +/* 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 void __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); +} +__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(void) +{ + struct bootmem_data *bdata; + unsigned long sdram_start, sdram_size; + 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 = PAGE_ALIGN(size); + + bdata = NODE_DATA(0)->bdata; + sdram_start = bdata->node_min_pfn << PAGE_SHIFT; + sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start; + + if (paddr) { + if ((paddr & ~PAGE_MASK) || paddr < sdram_start || + paddr + size > sdram_start + sdram_size) { + pr_err("Illegal SDRAM region for VRAM\n"); + return; + } + + if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE) < 0) { + pr_err("FB: failed to reserve VRAM\n"); + return; + } + } else { + if (size > sdram_size) { + pr_err("Illegal SDRAM size for VRAM\n"); + return; + } + + paddr = virt_to_phys(alloc_bootmem_pages(size)); + BUG_ON(paddr & ~PAGE_MASK); + } + + omap_vram_add_region(paddr, size); + + pr_info("Reserving %u bytes SDRAM for VRAM\n", size); +} + +/* + * Called at sram init time, before anything is pushed to the SRAM stack. + * Because of the stack scheme, we will allocate everything from the + * start of the lowest address region to the end of SRAM. This will also + * include padding for page alignment and possible holes between regions. + * + * As opposed to the SDRAM case, we'll also do any dynamic allocations at + * this point, since the driver built as a module would have problem with + * freeing / reallocating the regions. + */ +unsigned long __init omap_vram_reserve_sram(unsigned long sram_pstart, + unsigned long sram_vstart, + unsigned long sram_size, + unsigned long pstart_avail, + unsigned long size_avail) +{ + unsigned long pend_avail; + unsigned long reserved; + u32 paddr; + u32 size; + + paddr = omap_vram_sram_start; + size = omap_vram_sram_size; + + if (!size) + return 0; + + reserved = 0; + pend_avail = pstart_avail + size_avail; + + if (!paddr) { + /* Dynamic allocation */ + if ((size_avail & PAGE_MASK) < size) { + pr_err("Not enough SRAM for VRAM\n"); + return 0; + } + size_avail = (size_avail - size) & PAGE_MASK; + paddr = pstart_avail + size_avail; + } + + if (paddr < sram_pstart || + paddr + size > sram_pstart + sram_size) { + pr_err("Illegal SRAM region for VRAM\n"); + return 0; + } + + /* Reserve everything above the start of the region. */ + if (pend_avail - paddr > reserved) + reserved = pend_avail - paddr; + size_avail = pend_avail - reserved - pstart_avail; + + omap_vram_add_region(paddr, size); + + if (reserved) + pr_info("Reserving %lu bytes SRAM for VRAM\n", reserved); + + return reserved; +} + +void __init omap_vram_set_sdram_vram(u32 size, u32 start) +{ + omap_vram_sdram_start = start; + omap_vram_sdram_size = size; +} + +void __init omap_vram_set_sram_vram(u32 size, u32 start) +{ + omap_vram_sram_start = start; + omap_vram_sram_size = size; +} -- 1.6.5.1
WARNING: multiple messages have this Message-ID (diff)
From: Tomi Valkeinen <tomi.valkeinen@nokia.com> To: linux-kernel@vger.kernel.org Cc: linux-omap@vger.kernel.org, linux-fbdev-devel@lists.sourceforge.net Subject: [PATCH 04/19] OMAP: Add VRAM manager Date: Mon, 9 Nov 2009 13:45:11 +0200 [thread overview] Message-ID: <1257767126-12059-5-git-send-email-tomi.valkeinen@nokia.com> (raw) In-Reply-To: <1257767126-12059-4-git-send-email-tomi.valkeinen@nokia.com> Add a Video RAM manager for OMAP 2 and 3 platforms. VRAM manager is used to allocate large continuous blocks of SDRAM or SRAM. The features VRAM manager has that are missing from dma_alloc_* functions are: - Support for OMAP2's SRAM - Allocate without ioremapping - Allocate at defined physical addresses - Allows larger VRAM area and larger allocations The upcoming DSS2 uses VRAM manager. VRAM area size can be defined in kernel config, board file or with kernel boot parameters. Board file definition overrides kernel config, and boot parameter overrides kernel config and board file. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com> --- arch/arm/mach-omap2/io.c | 2 + arch/arm/plat-omap/include/plat/vram.h | 62 +++ arch/arm/plat-omap/sram.c | 8 + drivers/video/Kconfig | 1 + drivers/video/Makefile | 1 + drivers/video/omap2/Kconfig | 2 + drivers/video/omap2/Makefile | 1 + drivers/video/omap2/vram.c | 655 ++++++++++++++++++++++++++++++++ 8 files changed, 732 insertions(+), 0 deletions(-) create mode 100644 arch/arm/plat-omap/include/plat/vram.h create mode 100644 drivers/video/omap2/Kconfig create mode 100644 drivers/video/omap2/Makefile create mode 100644 drivers/video/omap2/vram.c diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index 9f22c20..6a4d8e4 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -33,6 +33,7 @@ #include <plat/sdrc.h> #include <plat/gpmc.h> #include <plat/serial.h> +#include <plat/vram.h> #ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once clkdev is ready */ #include "clock.h" @@ -264,6 +265,7 @@ void __init omap2_map_common_io(void) omap2_check_revision(); omap_sram_init(); omapfb_reserve_sdram(); + omap_vram_reserve_sdram(); } /* diff --git a/arch/arm/plat-omap/include/plat/vram.h b/arch/arm/plat-omap/include/plat/vram.h new file mode 100644 index 0000000..edd4987 --- /dev/null +++ b/arch/arm/plat-omap/include/plat/vram.h @@ -0,0 +1,62 @@ +/* + * 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. + */ + +#ifndef __OMAP_VRAM_H__ +#define __OMAP_VRAM_H__ + +#include <linux/types.h> + +#define OMAP_VRAM_MEMTYPE_SDRAM 0 +#define OMAP_VRAM_MEMTYPE_SRAM 1 +#define OMAP_VRAM_MEMTYPE_MAX 1 + +extern int omap_vram_add_region(unsigned long paddr, size_t size); +extern int omap_vram_free(unsigned long paddr, size_t size); +extern int omap_vram_alloc(int mtype, size_t size, unsigned long *paddr); +extern int omap_vram_reserve(unsigned long paddr, size_t size); +extern void omap_vram_get_info(unsigned long *vram, unsigned long *free_vram, + unsigned long *largest_free_block); + +#ifdef CONFIG_OMAP2_VRAM +extern void omap_vram_set_sdram_vram(u32 size, u32 start); +extern void omap_vram_set_sram_vram(u32 size, u32 start); + +extern void omap_vram_reserve_sdram(void); +extern unsigned long omap_vram_reserve_sram(unsigned long sram_pstart, + unsigned long sram_vstart, + unsigned long sram_size, + unsigned long pstart_avail, + unsigned long size_avail); +#else +static inline void omap_vram_set_sdram_vram(u32 size, u32 start) { } +static inline void omap_vram_set_sram_vram(u32 size, u32 start) { } + +static inline void omap_vram_reserve_sdram(void) { } +static inline unsigned long omap_vram_reserve_sram(unsigned long sram_pstart, + unsigned long sram_vstart, + unsigned long sram_size, + unsigned long pstart_avail, + unsigned long size_avail) +{ + return 0; +} +#endif + +#endif diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c index a53aa85..2f05c78 100644 --- a/arch/arm/plat-omap/sram.c +++ b/arch/arm/plat-omap/sram.c @@ -28,6 +28,7 @@ #include <plat/sram.h> #include <plat/board.h> #include <plat/cpu.h> +#include <plat/vram.h> #include <plat/control.h> @@ -185,6 +186,13 @@ void __init omap_detect_sram(void) omap_sram_start + SRAM_BOOTLOADER_SZ, omap_sram_size - SRAM_BOOTLOADER_SZ); omap_sram_size -= reserved; + + reserved = omap_vram_reserve_sram(omap_sram_start, omap_sram_base, + omap_sram_size, + omap_sram_start + SRAM_BOOTLOADER_SZ, + omap_sram_size - SRAM_BOOTLOADER_SZ); + omap_sram_size -= reserved; + omap_sram_ceil = omap_sram_base + omap_sram_size; } diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 9bbb285..af0448f 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2161,6 +2161,7 @@ config FB_BROADSHEET a bridge adapter. source "drivers/video/omap/Kconfig" +source "drivers/video/omap2/Kconfig" source "drivers/video/backlight/Kconfig" source "drivers/video/display/Kconfig" diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 80232e1..0f8da33 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -124,6 +124,7 @@ obj-$(CONFIG_FB_SM501) += sm501fb.o obj-$(CONFIG_FB_XILINX) += xilinxfb.o obj-$(CONFIG_FB_SH_MOBILE_LCDC) += sh_mobile_lcdcfb.o obj-$(CONFIG_FB_OMAP) += omap/ +obj-y += omap2/ obj-$(CONFIG_XEN_FBDEV_FRONTEND) += xen-fbfront.o obj-$(CONFIG_FB_CARMINE) += carminefb.o obj-$(CONFIG_FB_MB862XX) += mb862xx/ diff --git a/drivers/video/omap2/Kconfig b/drivers/video/omap2/Kconfig new file mode 100644 index 0000000..7a6c4c9 --- /dev/null +++ b/drivers/video/omap2/Kconfig @@ -0,0 +1,2 @@ +config OMAP2_VRAM + bool diff --git a/drivers/video/omap2/Makefile b/drivers/video/omap2/Makefile new file mode 100644 index 0000000..7fdf7bd --- /dev/null +++ b/drivers/video/omap2/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_OMAP2_VRAM) += vram.o diff --git a/drivers/video/omap2/vram.c b/drivers/video/omap2/vram.c new file mode 100644 index 0000000..55a4de5 --- /dev/null +++ b/drivers/video/omap2/vram.c @@ -0,0 +1,655 @@ +/* + * 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/seq_file.h> +#include <linux/bootmem.h> +#include <linux/completion.h> +#include <linux/debugfs.h> +#include <linux/jiffies.h> +#include <linux/module.h> + +#include <asm/setup.h> + +#include <plat/sram.h> +#include <plat/vram.h> +#include <plat/dma.h> + +#ifdef DEBUG +#define DBG(format, ...) pr_debug("VRAM: " format, ## __VA_ARGS__) +#else +#define DBG(format, ...) +#endif + +#define OMAP2_SRAM_START 0x40200000 +/* Maximum size, in reality this is smaller if SRAM is partially locked. */ +#define OMAP2_SRAM_SIZE 0xa0000 /* 640k */ + +/* 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 inline int region_mem_type(unsigned long paddr) +{ + if (paddr >= OMAP2_SRAM_START && + paddr < OMAP2_SRAM_START + OMAP2_SRAM_SIZE) + return OMAP_VRAM_MEMTYPE_SRAM; + else + return OMAP_VRAM_MEMTYPE_SDRAM; +} + +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); + + if (region_mem_type(rm->paddr) != region_mem_type(paddr)) + continue; + + 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 void _omap_vram_dma_cb(int lch, u16 ch_status, void *data) +{ + struct completion *compl = data; + complete(compl); +} + +static int _omap_vram_clear(u32 paddr, unsigned pages) +{ + struct completion compl; + unsigned elem_count; + unsigned frame_count; + int r; + int lch; + + init_completion(&compl); + + r = omap_request_dma(OMAP_DMA_NO_DEVICE, "VRAM DMA", + _omap_vram_dma_cb, + &compl, &lch); + if (r) { + pr_err("VRAM: request_dma failed for memory clear\n"); + return -EBUSY; + } + + elem_count = pages * PAGE_SIZE / 4; + frame_count = 1; + + omap_set_dma_transfer_params(lch, OMAP_DMA_DATA_TYPE_S32, + elem_count, frame_count, + OMAP_DMA_SYNC_ELEMENT, + 0, 0); + + omap_set_dma_dest_params(lch, 0, OMAP_DMA_AMODE_POST_INC, + paddr, 0, 0); + + omap_set_dma_color_mode(lch, OMAP_DMA_CONSTANT_FILL, 0x000000); + + omap_start_dma(lch); + + if (wait_for_completion_timeout(&compl, msecs_to_jiffies(1000)) == 0) { + omap_stop_dma(lch); + pr_err("VRAM: dma timeout while clearing memory\n"); + r = -EIO; + goto err; + } + + r = 0; +err: + omap_free_dma(lch); + + return r; +} + +static int _omap_vram_alloc(int mtype, 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); + + if (region_mem_type(rm->paddr) != mtype) + continue; + + 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; + + _omap_vram_clear(start, pages); + + return 0; + } + + return -ENOMEM; +} + +int omap_vram_alloc(int mtype, size_t size, unsigned long *paddr) +{ + unsigned pages; + int r; + + BUG_ON(mtype > OMAP_VRAM_MEMTYPE_MAX || !size); + + DBG("alloc mem type %d size %d\n", mtype, size); + + size = PAGE_ALIGN(size); + pages = size >> PAGE_SHIFT; + + mutex_lock(®ion_mutex); + + r = _omap_vram_alloc(mtype, 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_sram_start __initdata; +static u32 omap_vram_sram_size __initdata; + +/* 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 void __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); +} +__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(void) +{ + struct bootmem_data *bdata; + unsigned long sdram_start, sdram_size; + 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 = PAGE_ALIGN(size); + + bdata = NODE_DATA(0)->bdata; + sdram_start = bdata->node_min_pfn << PAGE_SHIFT; + sdram_size = (bdata->node_low_pfn << PAGE_SHIFT) - sdram_start; + + if (paddr) { + if ((paddr & ~PAGE_MASK) || paddr < sdram_start || + paddr + size > sdram_start + sdram_size) { + pr_err("Illegal SDRAM region for VRAM\n"); + return; + } + + if (reserve_bootmem(paddr, size, BOOTMEM_EXCLUSIVE) < 0) { + pr_err("FB: failed to reserve VRAM\n"); + return; + } + } else { + if (size > sdram_size) { + pr_err("Illegal SDRAM size for VRAM\n"); + return; + } + + paddr = virt_to_phys(alloc_bootmem_pages(size)); + BUG_ON(paddr & ~PAGE_MASK); + } + + omap_vram_add_region(paddr, size); + + pr_info("Reserving %u bytes SDRAM for VRAM\n", size); +} + +/* + * Called at sram init time, before anything is pushed to the SRAM stack. + * Because of the stack scheme, we will allocate everything from the + * start of the lowest address region to the end of SRAM. This will also + * include padding for page alignment and possible holes between regions. + * + * As opposed to the SDRAM case, we'll also do any dynamic allocations at + * this point, since the driver built as a module would have problem with + * freeing / reallocating the regions. + */ +unsigned long __init omap_vram_reserve_sram(unsigned long sram_pstart, + unsigned long sram_vstart, + unsigned long sram_size, + unsigned long pstart_avail, + unsigned long size_avail) +{ + unsigned long pend_avail; + unsigned long reserved; + u32 paddr; + u32 size; + + paddr = omap_vram_sram_start; + size = omap_vram_sram_size; + + if (!size) + return 0; + + reserved = 0; + pend_avail = pstart_avail + size_avail; + + if (!paddr) { + /* Dynamic allocation */ + if ((size_avail & PAGE_MASK) < size) { + pr_err("Not enough SRAM for VRAM\n"); + return 0; + } + size_avail = (size_avail - size) & PAGE_MASK; + paddr = pstart_avail + size_avail; + } + + if (paddr < sram_pstart || + paddr + size > sram_pstart + sram_size) { + pr_err("Illegal SRAM region for VRAM\n"); + return 0; + } + + /* Reserve everything above the start of the region. */ + if (pend_avail - paddr > reserved) + reserved = pend_avail - paddr; + size_avail = pend_avail - reserved - pstart_avail; + + omap_vram_add_region(paddr, size); + + if (reserved) + pr_info("Reserving %lu bytes SRAM for VRAM\n", reserved); + + return reserved; +} + +void __init omap_vram_set_sdram_vram(u32 size, u32 start) +{ + omap_vram_sdram_start = start; + omap_vram_sdram_size = size; +} + +void __init omap_vram_set_sram_vram(u32 size, u32 start) +{ + omap_vram_sram_start = start; + omap_vram_sram_size = size; +} -- 1.6.5.1 ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. 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next prev parent reply other threads:[~2009-11-09 11:46 UTC|newest] Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-11-09 11:45 [PATCH 00/19] OMAP: DSS2 v5 intro Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 01/19] OMAP2: Add funcs for writing SMS_ROT_* registers Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 02/19] OMAP: OMAPFB: split omapfb.h Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 03/19] OMAP: OMAPFB: add omapdss device Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen [this message] 2009-11-09 11:45 ` [PATCH 04/19] OMAP: Add VRAM manager Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 05/19] OMAP: Add support for VRFB rotation engine Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 06/19] OMAP: DSS2: Documentation for DSS2 Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 07/19] OMAP: DSS2: Display Subsystem Driver core Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 08/19] OMAP: DSS2: Add more core files Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 09/19] OMAP: DSS2: DISPC Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 10/19] OMAP: DSS2: DPI driver Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 11/19] OMAP: DSS2: Video encoder driver Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 12/19] OMAP: DSS2: RFBI driver Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 13/19] OMAP: DSS2: SDI driver Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 14/19] OMAP: DSS2: DSI driver Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 15/19] OMAP: DSS2: omapfb driver Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 16/19] OMAP: DSS2: Add DPI panel drivers Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 17/19] OMAP: DSS2: Taal DSI command mode panel driver Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 18/19] OMAP: SDP: Enable DSS2 for OMAP3 SDP board Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-09 11:45 ` [PATCH 19/19] MAINTAINERS: Add OMAP2/3 DSS and OMAPFB maintainer Tomi Valkeinen 2009-11-09 11:45 ` Tomi Valkeinen 2009-11-10 12:40 ` [PATCH 00/19] OMAP: DSS2 v5 intro Artem Bityutskiy 2009-11-10 12:40 ` Artem Bityutskiy 2009-11-11 8:45 ` Tomi Valkeinen 2009-11-11 8:45 ` Tomi Valkeinen 2009-11-11 9:44 ` Tomi Valkeinen 2009-11-11 9:44 ` Tomi Valkeinen 2009-11-11 18:42 ` Tony Lindgren 2009-11-11 18:42 ` Tony Lindgren 2009-11-12 5:03 ` Artem Bityutskiy 2009-11-12 5:03 ` Artem Bityutskiy 2009-11-12 18:08 ` Tony Lindgren 2009-11-12 18:08 ` Tony Lindgren 2009-11-12 5:10 ` Stephen Rothwell 2009-11-12 5:10 ` Stephen Rothwell 2009-11-12 18:14 ` Tony Lindgren 2009-11-12 18:14 ` Tony Lindgren 2009-11-12 20:48 ` Stephen Rothwell 2009-11-12 20:48 ` Stephen Rothwell 2009-11-13 9:56 ` Tomi Valkeinen 2009-11-13 9:56 ` Tomi Valkeinen 2009-11-13 17:59 ` Tony Lindgren 2009-11-13 17:59 ` Tony Lindgren 2009-11-15 22:38 ` Stephen Rothwell 2009-11-15 22:38 ` Stephen Rothwell -- strict thread matches above, loose matches on Subject: below -- 2009-09-24 11:56 [PATCH 00/19] OMAP: DSS2: Intro Tomi Valkeinen 2009-09-24 11:56 ` [PATCH 01/19] OMAP2: Add funcs for writing SMS_ROT_* registers Tomi Valkeinen 2009-09-24 11:56 ` [PATCH 02/19] OMAP: OMAPFB: split omapfb.h Tomi Valkeinen 2009-09-24 11:56 ` [PATCH 03/19] OMAP: OMAPFB: add omapdss device Tomi Valkeinen 2009-09-24 11:56 ` [PATCH 04/19] OMAP: Add VRAM manager Tomi Valkeinen
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