From 0f07d945f490d1ba8ace3b943b2a2d13daf4c49a Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Thu, 17 Feb 2011 23:29:13 +0200 Subject: [PATCH] staging: xgifb: copy PCI ROM properly Use proper helper functions to copy the PCI ROM. Also use dynamic memory allocation. The original code mapped incorrect amount of memory and will crash on some platforms. Signed-off-by: Aaro Koskinen Signed-off-by: Greg Kroah-Hartman --- drivers/staging/xgifb/XGI_main_26.c | 61 +++++++++-------------------- 1 file changed, 19 insertions(+), 42 deletions(-) diff --git a/drivers/staging/xgifb/XGI_main_26.c b/drivers/staging/xgifb/XGI_main_26.c index 2328926162f2..90dca40c4494 100644 --- a/drivers/staging/xgifb/XGI_main_26.c +++ b/drivers/staging/xgifb/XGI_main_26.c @@ -54,6 +54,8 @@ int XGIfb_accel = 0; #define GPIOG_READ (1<<1) int XGIfb_GetXG21DefaultLVDSModeIdx(void); +#define XGIFB_ROM_SIZE 65536 + /* -------------------- Macro definitions ---------------------------- */ #undef XGIFBDEBUG @@ -2881,52 +2883,26 @@ XGIINITSTATIC int __init XGIfb_setup(char *options) return 0; } -static unsigned char VBIOS_BUF[65535]; - -static unsigned char *attempt_map_rom(struct pci_dev *dev, void *copy_address) +static unsigned char *xgifb_copy_rom(struct pci_dev *dev) { - u32 rom_size = 0; - u32 rom_address = 0; - int j; - - /* Get the size of the expansion rom */ - pci_write_config_dword(dev, PCI_ROM_ADDRESS, 0xFFFFFFFF); - pci_read_config_dword(dev, PCI_ROM_ADDRESS, &rom_size); - if ((rom_size & 0x01) == 0) { - printk("No ROM\n"); - return NULL; - } + void __iomem *rom_address; + unsigned char *rom_copy; + size_t rom_size; - rom_size &= 0xFFFFF800; - rom_size = (~rom_size) + 1; - - rom_address = pci_resource_start(dev, 0); - if (rom_address == 0 || rom_address == 0xFFFFFFF0) { - printk("No suitable rom address found\n"); + rom_address = pci_map_rom(dev, &rom_size); + if (rom_address == NULL) return NULL; - } - printk("ROM Size is %dK, Address is %x\n", rom_size / 1024, rom_address); + rom_copy = vzalloc(XGIFB_ROM_SIZE); + if (rom_copy == NULL) + goto done; - /* Map ROM */ - pci_write_config_dword(dev, PCI_ROM_ADDRESS, rom_address - | PCI_ROM_ADDRESS_ENABLE); + rom_size = min_t(size_t, rom_size, XGIFB_ROM_SIZE); + memcpy_fromio(rom_copy, rom_address, rom_size); - /* memcpy(copy_address, rom_address, rom_size); */ - { - unsigned char *virt_addr = ioremap(rom_address, 0x8000000); - - unsigned char *from = (unsigned char *) virt_addr; - unsigned char *to = (unsigned char *) copy_address; - for (j = 0; j < 65536 /*rom_size*/; j++) - *to++ = *from++; - } - - pci_write_config_dword(dev, PCI_ROM_ADDRESS, 0); - - printk("Copy is done\n"); - - return copy_address; +done: + pci_unmap_rom(dev, rom_address); + return rom_copy; } static int __devinit xgifb_probe(struct pci_dev *pdev, @@ -3039,8 +3015,7 @@ static int __devinit xgifb_probe(struct pci_dev *pdev, XGIhw_ext.pDevice = NULL; if ((xgi_video_info.chip == XG21) || (XGIfb_userom)) { - XGIhw_ext.pjVirtualRomBase = attempt_map_rom(pdev, VBIOS_BUF); - + XGIhw_ext.pjVirtualRomBase = xgifb_copy_rom(pdev); if (XGIhw_ext.pjVirtualRomBase) printk(KERN_INFO "XGIfb: Video ROM found and mapped to %p\n", XGIhw_ext.pjVirtualRomBase); else @@ -3434,6 +3409,7 @@ static int __devinit xgifb_probe(struct pci_dev *pdev, return 0; error: + vfree(XGIhw_ext.pjVirtualRomBase); vfree(XGIhw_ext.pSR); vfree(XGIhw_ext.pCR); framebuffer_release(fb_info); @@ -3449,6 +3425,7 @@ static void __devexit xgifb_remove(struct pci_dev *pdev) /* Unregister the framebuffer */ /* if (xgi_video_info.registered) { */ unregister_framebuffer(fb_info); + vfree(XGIhw_ext.pjVirtualRomBase); framebuffer_release(fb_info); /* } */ -- 2.20.1