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[PATCH] ps3: Preallocate bootmem memory for ps3fb
Preallocate bootmem memory for the PS3 frame buffer device, which needs a large block of physically-contiguous memory. The size of this memory block is configurable: - The config option CONFIG_FB_PS3_DEFAULT_SIZE_M allows to specify the default amount of memory (in MiB) allocated to the virtual frame buffer. - The early boot parameter `ps3fb=xxx' allows to override the default value. It will be rounded up to a multiple of 1 MiB, if needed. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Cc: James Simmons <jsimmons@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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2 changed files with 51 additions and 0 deletions
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@ -24,6 +24,7 @@
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#include <linux/root_dev.h>
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#include <linux/console.h>
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#include <linux/kexec.h>
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#include <linux/bootmem.h>
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#include <asm/machdep.h>
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#include <asm/firmware.h>
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@ -80,6 +81,46 @@ static void ps3_panic(char *str)
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for (;;) ;
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}
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static void prealloc(struct ps3_prealloc *p)
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{
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if (!p->size)
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return;
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p->address = __alloc_bootmem(p->size, p->align, __pa(MAX_DMA_ADDRESS));
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if (!p->address) {
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printk(KERN_ERR "%s: Cannot allocate %s\n", __FUNCTION__,
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p->name);
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return;
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}
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printk(KERN_INFO "%s: %lu bytes at %p\n", p->name, p->size,
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p->address);
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}
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#ifdef CONFIG_FB_PS3
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struct ps3_prealloc ps3fb_videomemory = {
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.name = "ps3fb videomemory",
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.size = CONFIG_FB_PS3_DEFAULT_SIZE_M*1024*1024,
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.align = 1024*1024 /* the GPU requires 1 MiB alignment */
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};
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#define prealloc_ps3fb_videomemory() prealloc(&ps3fb_videomemory)
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static int __init early_parse_ps3fb(char *p)
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{
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if (!p)
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return 1;
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ps3fb_videomemory.size = _ALIGN_UP(memparse(p, &p),
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ps3fb_videomemory.align);
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return 0;
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}
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early_param("ps3fb", early_parse_ps3fb);
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#else
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#define prealloc_ps3fb_videomemory() do { } while (0)
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#endif
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static void __init ps3_setup_arch(void)
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{
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union ps3_firmware_version v;
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@ -101,6 +142,7 @@ static void __init ps3_setup_arch(void)
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conswitchp = &dummy_con;
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#endif
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prealloc_ps3fb_videomemory();
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ppc_md.power_save = ps3_power_save;
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DBG(" <- %s:%d\n", __func__, __LINE__);
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@ -388,4 +388,13 @@ struct ps3_vuart_port_device {
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int ps3_vuart_port_device_register(struct ps3_vuart_port_device *dev);
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struct ps3_prealloc {
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const char *name;
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void *address;
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unsigned long size;
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unsigned long align;
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};
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extern struct ps3_prealloc ps3fb_videomemory;
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#endif
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