lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Wed, 6 Jul 2011 19:57:13 -0400 From: Jay Estabrook <jay.estabrook@...il.com> To: airlied@...ux.ie, linux-kernel <linux-kernel@...r.kernel.org>, linux-alpha <linux-alpha@...r.kernel.org>, dri-devel <dri-devel@...ts.freedesktop.org> Cc: Matt Turner <mattst88@...il.com>, Richard Henderson <rth@...ddle.net>, Ivan Kokshaysky <ink@...assic.park.msu.ru>, Jay Estabrook <jay.estabrook@...il.com> Subject: [PATCH 3/3 REPOST #2] alpha, drm: Add Alpha support to Radeon DRM code Alpha needs to have available the system bus address for the Radeon's local memory, so that it can be used in ttm_bo_vm_fault(), when building the PTEs for accessing that VRAM. So, we make bus.addr hold the ioremap() return, and then we can modify bus.base appropriately for use during page fault processing. Signed-off-by: Jay Estabrook <jay.estabrook@...il.com> --- drivers/gpu/drm/radeon/radeon_ttm.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff -Naurp a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c --- a/drivers/gpu/drm/radeon/radeon_ttm.c 2011-04-26 23:48:50.000000000 -0400 +++ b/drivers/gpu/drm/radeon/radeon_ttm.c 2011-05-03 18:24:27.000000000 -0400 @@ -450,6 +450,29 @@ static int radeon_ttm_io_mem_reserve(str return -EINVAL; mem->bus.base = rdev->mc.aper_base; mem->bus.is_iomem = true; +#ifdef __alpha__ + /* + * Alpha: use bus.addr to hold the ioremap() return, + * so we can modify bus.base below. + */ + if (mem->placement & TTM_PL_FLAG_WC) + mem->bus.addr = + ioremap_wc(mem->bus.base + mem->bus.offset, + mem->bus.size); + else + mem->bus.addr = + ioremap_nocache(mem->bus.base + mem->bus.offset, + mem->bus.size); + + /* + * Alpha: Use just the bus offset plus + * the hose/domain memory base for bus.base. + * It then can be used to build PTEs for VRAM + * access, as done in ttm_bo_vm_fault(). + */ + mem->bus.base = (mem->bus.base & 0x0ffffffffUL) + + rdev->ddev->hose->dense_mem_base; +#endif break; default: return -EINVAL; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists