Attachment 77331 Details for Bug 62976 – Possible fix

[patch] Possible fix

0001-drm-radeon-avoid-moving-the-MC-vram-location.patch (text/plain), 9.66 KB, created by Alex Deucher on 2013-04-02 17:28:39 UTC

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Creator: Alex Deucher

Created: 2013-04-02 17:28:39 UTC

Size: 9.66 KB

patch

obsolete

>From d99896ad3452ee019dae71b0fc7056da62673273 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Tue, 2 Apr 2013 13:22:17 -0400
>Subject: [PATCH] drm/radeon: avoid moving the MC vram location
>
>When setting up the memory controller, avoid moving
>the vram location if possible. This should avoid
>problems with hangs and corruption at boot especially
>on UEFI systems due to invalid reads from the display
>hardware when try and move the location of vram.
>
>May fix:
>https://bugs.freedesktop.org/show_bug.cgi?id=43655
>https://bugs.freedesktop.org/show_bug.cgi?id=62976
>et al.
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/radeon/evergreen.c     |    4 ++-
> drivers/gpu/drm/radeon/r600.c          |   11 +++----
> drivers/gpu/drm/radeon/radeon.h        |    1 +
> drivers/gpu/drm/radeon/radeon_device.c |   15 ++++++++-
> drivers/gpu/drm/radeon/rv770.c         |    8 ++++-
> drivers/gpu/drm/radeon/si.c            |   50 ++++---------------------------
> 6 files changed, 35 insertions(+), 54 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
>index 305a657..88f76e9 100644
>--- a/drivers/gpu/drm/radeon/evergreen.c
>+++ b/drivers/gpu/drm/radeon/evergreen.c
>@@ -1425,6 +1425,7 @@ void evergreen_mc_resume(struct radeon_device *rdev, struct evergreen_mc_save *s
> void evergreen_mc_program(struct radeon_device *rdev)
> {
> 	struct evergreen_mc_save save;
>+	u32 mc_vm_fb_location = RREG32(MC_VM_FB_LOCATION);
> 	u32 tmp;
> 	int i, j;
> 
>@@ -1477,7 +1478,8 @@ void evergreen_mc_program(struct radeon_device *rdev)
> 	}
> 	tmp = ((rdev->mc.vram_end >> 24) & 0xFFFF) << 16;
> 	tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
>-	WREG32(MC_VM_FB_LOCATION, tmp);
>+	if (tmp != mc_vm_fb_location)
>+		WREG32(MC_VM_FB_LOCATION, tmp);
> 	WREG32(HDP_NONSURFACE_BASE, (rdev->mc.vram_start >> 8));
> 	WREG32(HDP_NONSURFACE_INFO, (2 << 7) | (1 << 30));
> 	WREG32(HDP_NONSURFACE_SIZE, 0x3FFFFFFF);
>diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
>index 0740db3..1edf65f 100644
>--- a/drivers/gpu/drm/radeon/r600.c
>+++ b/drivers/gpu/drm/radeon/r600.c
>@@ -1049,6 +1049,7 @@ int r600_mc_wait_for_idle(struct radeon_device *rdev)
> static void r600_mc_program(struct radeon_device *rdev)
> {
> 	struct rv515_mc_save save;
>+	u32 mc_vm_fb_location = RREG32(MC_VM_FB_LOCATION);
> 	u32 tmp;
> 	int i, j;
> 
>@@ -1090,7 +1091,8 @@ static void r600_mc_program(struct radeon_device *rdev)
> 	WREG32(MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR, rdev->vram_scratch.gpu_addr >> 12);
> 	tmp = ((rdev->mc.vram_end >> 24) & 0xFFFF) << 16;
> 	tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
>-	WREG32(MC_VM_FB_LOCATION, tmp);
>+	if (tmp != mc_vm_fb_location)
>+		WREG32(MC_VM_FB_LOCATION, tmp);
> 	WREG32(HDP_NONSURFACE_BASE, (rdev->mc.vram_start >> 8));
> 	WREG32(HDP_NONSURFACE_INFO, (2 << 7));
> 	WREG32(HDP_NONSURFACE_SIZE, 0x3FFFFFFF);
>@@ -1166,11 +1168,8 @@ static void r600_vram_gtt_location(struct radeon_device *rdev, struct radeon_mc
> 				mc->mc_vram_size >> 20, mc->vram_start,
> 				mc->vram_end, mc->real_vram_size >> 20);
> 	} else {
>-		u64 base = 0;
>-		if (rdev->flags & RADEON_IS_IGP) {
>-			base = RREG32(MC_VM_FB_LOCATION) & 0xFFFF;
>-			base <<= 24;
>-		}
>+		u64 base = RREG32(MC_VM_FB_LOCATION) & 0xFFFF;
>+		base <<= 24;
> 		radeon_vram_location(rdev, &rdev->mc, base);
> 		rdev->mc.gtt_base_align = 0;
> 		radeon_gtt_location(rdev, mc);
>diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
>index 8263af3..8bd8753 100644
>--- a/drivers/gpu/drm/radeon/radeon.h
>+++ b/drivers/gpu/drm/radeon/radeon.h
>@@ -517,6 +517,7 @@ struct radeon_mc {
> 	bool			vram_is_ddr;
> 	bool			igp_sideport_enabled;
> 	u64                     gtt_base_align;
>+	u64                     mc_mask;
> };
> 
> bool radeon_combios_sideport_present(struct radeon_device *rdev);
>diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
>index 44b8034..62d0ba3 100644
>--- a/drivers/gpu/drm/radeon/radeon_device.c
>+++ b/drivers/gpu/drm/radeon/radeon_device.c
>@@ -359,7 +359,7 @@ void radeon_vram_location(struct radeon_device *rdev, struct radeon_mc *mc, u64
> 	uint64_t limit = (uint64_t)radeon_vram_limit << 20;
> 
> 	mc->vram_start = base;
>-	if (mc->mc_vram_size > (0xFFFFFFFF - base + 1)) {
>+	if (mc->mc_vram_size > (rdev->mc.mc_mask - base + 1)) {
> 		dev_warn(rdev->dev, "limiting VRAM to PCI aperture size\n");
> 		mc->real_vram_size = mc->aper_size;
> 		mc->mc_vram_size = mc->aper_size;
>@@ -394,7 +394,7 @@ void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
> {
> 	u64 size_af, size_bf;
> 
>-	size_af = ((0xFFFFFFFF - mc->vram_end) + mc->gtt_base_align) & ~mc->gtt_base_align;
>+	size_af = ((rdev->mc.mc_mask - mc->vram_end) + mc->gtt_base_align) & ~mc->gtt_base_align;
> 	size_bf = mc->vram_start & ~mc->gtt_base_align;
> 	if (size_bf > size_af) {
> 		if (mc->gtt_size > size_bf) {
>@@ -1068,6 +1068,17 @@ int radeon_device_init(struct radeon_device *rdev,
> 		radeon_agp_disable(rdev);
> 	}
> 
>+	/* Set the internal MC address mask
>+	 * This is the max address of the GPU's
>+	 * internal address space.
>+	 */
>+	if (rdev->family >= CHIP_CAYMAN)
>+		rdev->mc.mc_mask = 0xffffffffffULL; /* 40 bit MC */
>+	else if (rdev->family >= CHIP_CEDAR)
>+		rdev->mc.mc_mask = 0xfffffffffULL; /* 36 bit MC */
>+	else
>+		rdev->mc.mc_mask = 0xffffffffULL; /* 32 bit MC */
>+
> 	/* set DMA mask + need_dma32 flags.
> 	 * PCIE - can handle 40-bits.
> 	 * IGP - can handle 40-bits
>diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
>index d63fe1d..4b3dc2e 100644
>--- a/drivers/gpu/drm/radeon/rv770.c
>+++ b/drivers/gpu/drm/radeon/rv770.c
>@@ -264,6 +264,7 @@ static void rv770_agp_enable(struct radeon_device *rdev)
> static void rv770_mc_program(struct radeon_device *rdev)
> {
> 	struct rv515_mc_save save;
>+	u32 mc_vm_fb_location = RREG32(MC_VM_FB_LOCATION);
> 	u32 tmp;
> 	int i, j;
> 
>@@ -310,7 +311,8 @@ static void rv770_mc_program(struct radeon_device *rdev)
> 	WREG32(MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR, rdev->vram_scratch.gpu_addr >> 12);
> 	tmp = ((rdev->mc.vram_end >> 24) & 0xFFFF) << 16;
> 	tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
>-	WREG32(MC_VM_FB_LOCATION, tmp);
>+	if (tmp != mc_vm_fb_location)
>+		WREG32(MC_VM_FB_LOCATION, tmp);
> 	WREG32(HDP_NONSURFACE_BASE, (rdev->mc.vram_start >> 8));
> 	WREG32(HDP_NONSURFACE_INFO, (2 << 7));
> 	WREG32(HDP_NONSURFACE_SIZE, 0x3FFFFFFF);
>@@ -861,7 +863,9 @@ void r700_vram_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
> 				mc->mc_vram_size >> 20, mc->vram_start,
> 				mc->vram_end, mc->real_vram_size >> 20);
> 	} else {
>-		radeon_vram_location(rdev, &rdev->mc, 0);
>+		u64 base = RREG32(MC_VM_FB_LOCATION) & 0xFFFF;
>+		base <<= 24;
>+		radeon_vram_location(rdev, &rdev->mc, base);
> 		rdev->mc.gtt_base_align = 0;
> 		radeon_gtt_location(rdev, mc);
> 	}
>diff --git a/drivers/gpu/drm/radeon/si.c b/drivers/gpu/drm/radeon/si.c
>index bafbe32..a6e0506 100644
>--- a/drivers/gpu/drm/radeon/si.c
>+++ b/drivers/gpu/drm/radeon/si.c
>@@ -2493,6 +2493,7 @@ bool si_dma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
> static void si_mc_program(struct radeon_device *rdev)
> {
> 	struct evergreen_mc_save save;
>+	u32 mc_vm_fb_location = RREG32(MC_VM_FB_LOCATION);
> 	u32 tmp;
> 	int i, j;
> 
>@@ -2521,7 +2522,8 @@ static void si_mc_program(struct radeon_device *rdev)
> 	       rdev->vram_scratch.gpu_addr >> 12);
> 	tmp = ((rdev->mc.vram_end >> 24) & 0xFFFF) << 16;
> 	tmp |= ((rdev->mc.vram_start >> 24) & 0xFFFF);
>-	WREG32(MC_VM_FB_LOCATION, tmp);
>+	if (tmp != mc_vm_fb_location)
>+		WREG32(MC_VM_FB_LOCATION, tmp);
> 	/* XXX double check these! */
> 	WREG32(HDP_NONSURFACE_BASE, (rdev->mc.vram_start >> 8));
> 	WREG32(HDP_NONSURFACE_INFO, (2 << 7) | (1 << 30));
>@@ -2538,58 +2540,20 @@ static void si_mc_program(struct radeon_device *rdev)
> 	rv515_vga_render_disable(rdev);
> }
> 
>-/* SI MC address space is 40 bits */
>-static void si_vram_location(struct radeon_device *rdev,
>-			     struct radeon_mc *mc, u64 base)
>-{
>-	mc->vram_start = base;
>-	if (mc->mc_vram_size > (0xFFFFFFFFFFULL - base + 1)) {
>-		dev_warn(rdev->dev, "limiting VRAM to PCI aperture size\n");
>-		mc->real_vram_size = mc->aper_size;
>-		mc->mc_vram_size = mc->aper_size;
>-	}
>-	mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
>-	dev_info(rdev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
>-			mc->mc_vram_size >> 20, mc->vram_start,
>-			mc->vram_end, mc->real_vram_size >> 20);
>-}
>-
>-static void si_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
>-{
>-	u64 size_af, size_bf;
>-
>-	size_af = ((0xFFFFFFFFFFULL - mc->vram_end) + mc->gtt_base_align) & ~mc->gtt_base_align;
>-	size_bf = mc->vram_start & ~mc->gtt_base_align;
>-	if (size_bf > size_af) {
>-		if (mc->gtt_size > size_bf) {
>-			dev_warn(rdev->dev, "limiting GTT\n");
>-			mc->gtt_size = size_bf;
>-		}
>-		mc->gtt_start = (mc->vram_start & ~mc->gtt_base_align) - mc->gtt_size;
>-	} else {
>-		if (mc->gtt_size > size_af) {
>-			dev_warn(rdev->dev, "limiting GTT\n");
>-			mc->gtt_size = size_af;
>-		}
>-		mc->gtt_start = (mc->vram_end + 1 + mc->gtt_base_align) & ~mc->gtt_base_align;
>-	}
>-	mc->gtt_end = mc->gtt_start + mc->gtt_size - 1;
>-	dev_info(rdev->dev, "GTT: %lluM 0x%016llX - 0x%016llX\n",
>-			mc->gtt_size >> 20, mc->gtt_start, mc->gtt_end);
>-}
>-
> static void si_vram_gtt_location(struct radeon_device *rdev,
> 				 struct radeon_mc *mc)
> {
>+	u64 base = RREG32(MC_VM_FB_LOCATION) & 0xFFFF;
>+	base <<= 24;
> 	if (mc->mc_vram_size > 0xFFC0000000ULL) {
> 		/* leave room for at least 1024M GTT */
> 		dev_warn(rdev->dev, "limiting VRAM\n");
> 		mc->real_vram_size = 0xFFC0000000ULL;
> 		mc->mc_vram_size = 0xFFC0000000ULL;
> 	}
>-	si_vram_location(rdev, &rdev->mc, 0);
>+	radeon_vram_location(rdev, &rdev->mc, base);
> 	rdev->mc.gtt_base_align = 0;
>-	si_gtt_location(rdev, mc);
>+	radeon_gtt_location(rdev, mc);
> }
> 
> static int si_mc_init(struct radeon_device *rdev)
>-- 
>1.7.7.5
>

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