[PATCH 00/10] make stolen resource centric

[PATCH 00/10] make stolen resource centric

[Matthew Auld]

Continuation of Paulo' stolen series[1], addressing the feedback from Joonas and
Chris.

[1] https://patchwork.freedesktop.org/series/30923/

Joonas Lahtinen (1):
  x86/early-quirks: Extend Intel graphics stolen memory placement to
    64bit

Matthew Auld (9):
  x86/early-quirks: replace the magical increment start values
  x86/early-quirks: reverse the if ladders
  drm/i915: nuke the duplicated stolen discovery
  drm/i915: make dsm struct resource centric
  drm/i915: make reserved struct resource centric
  drm/i915: make mappable struct resource centric
  drm/i915: give stolen_usable_size a more suitable home
  drm/i915: prefer resource_size_t for everything stolen
  drm/i915: prefer stolen_usable_size for the range sanity check

 arch/x86/kernel/early-quirks.c                |  92 +++++----
 drivers/char/agp/intel-gtt.c                  |  14 +-
 drivers/gpu/drm/i915/gvt/gvt.h                |   2 +-
 drivers/gpu/drm/i915/i915_debugfs.c           |   4 +-
 drivers/gpu/drm/i915/i915_drv.c               |   2 +-
 drivers/gpu/drm/i915/i915_drv.h               |  35 +++-
 drivers/gpu/drm/i915/i915_gem.c               |   8 +-
 drivers/gpu/drm/i915/i915_gem_execbuffer.c    |   2 +-
 drivers/gpu/drm/i915/i915_gem_gtt.c           |  92 +++------
 drivers/gpu/drm/i915/i915_gem_gtt.h           |  19 +-
 drivers/gpu/drm/i915/i915_gem_stolen.c        | 264 ++++++++------------------
 drivers/gpu/drm/i915/i915_gpu_error.c         |   2 +-
 drivers/gpu/drm/i915/i915_vma.c               |   2 +-
 drivers/gpu/drm/i915/intel_display.c          |   5 +-
 drivers/gpu/drm/i915/intel_fbc.c              |  13 +-
 drivers/gpu/drm/i915/intel_fbdev.c            |   3 +-
 drivers/gpu/drm/i915/intel_overlay.c          |   4 +-
 drivers/gpu/drm/i915/intel_pm.c               |  31 +--
 drivers/gpu/drm/i915/selftests/i915_gem_gtt.c |   4 +-
 drivers/gpu/drm/i915/selftests/mock_gtt.c     |   4 +-
 include/drm/i915_drm.h                        |   3 +
 include/drm/intel-gtt.h                       |   3 +-
 22 files changed, 236 insertions(+), 372 deletions(-)

-- 
2.14.3

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

[PATCH 01/10] x86/early-quirks: Extend Intel graphics stolen memory placement to 64bit

[Matthew Auld]

From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

To give upcoming SKU BIOSes more flexibility in placing the Intel
graphics stolen memory, make all variables storing the placement or size
compatible with full 64 bit range. Also by exporting the stolen region
as a resource, we can then nuke the duplicated stolen discovery in i915.

v2: export the stolen region as a resource
    fix u16 << 16 (Chris)
v3: actually fix u16 << 16

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
---
 arch/x86/kernel/early-quirks.c | 86 +++++++++++++++++++++++-------------------
 include/drm/i915_drm.h         |  3 ++
 2 files changed, 50 insertions(+), 39 deletions(-)

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 1e82f787c160..d7236e2f5eed 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -243,7 +243,7 @@ static void __init intel_remapping_check(int num, int slot, int func)
 #define KB(x)	((x) * 1024UL)
 #define MB(x)	(KB (KB (x)))
 
-static size_t __init i830_tseg_size(void)
+static resource_size_t __init i830_tseg_size(void)
 {
 	u8 esmramc = read_pci_config_byte(0, 0, 0, I830_ESMRAMC);
 
@@ -256,7 +256,7 @@ static size_t __init i830_tseg_size(void)
 		return KB(512);
 }
 
-static size_t __init i845_tseg_size(void)
+static resource_size_t __init i845_tseg_size(void)
 {
 	u8 esmramc = read_pci_config_byte(0, 0, 0, I845_ESMRAMC);
 	u8 tseg_size = esmramc & I845_TSEG_SIZE_MASK;
@@ -273,7 +273,7 @@ static size_t __init i845_tseg_size(void)
 	return 0;
 }
 
-static size_t __init i85x_tseg_size(void)
+static resource_size_t __init i85x_tseg_size(void)
 {
 	u8 esmramc = read_pci_config_byte(0, 0, 0, I85X_ESMRAMC);
 
@@ -283,12 +283,12 @@ static size_t __init i85x_tseg_size(void)
 	return MB(1);
 }
 
-static size_t __init i830_mem_size(void)
+static resource_size_t __init i830_mem_size(void)
 {
 	return read_pci_config_byte(0, 0, 0, I830_DRB3) * MB(32);
 }
 
-static size_t __init i85x_mem_size(void)
+static resource_size_t __init i85x_mem_size(void)
 {
 	return read_pci_config_byte(0, 0, 1, I85X_DRB3) * MB(32);
 }
@@ -297,36 +297,36 @@ static size_t __init i85x_mem_size(void)
  * On 830/845/85x the stolen memory base isn't available in any
  * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
  */
-static phys_addr_t __init i830_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i830_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
-	return (phys_addr_t)i830_mem_size() - i830_tseg_size() - stolen_size;
+	return i830_mem_size() - i830_tseg_size() - stolen_size;
 }
 
-static phys_addr_t __init i845_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i845_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
-	return (phys_addr_t)i830_mem_size() - i845_tseg_size() - stolen_size;
+	return i830_mem_size() - i845_tseg_size() - stolen_size;
 }
 
-static phys_addr_t __init i85x_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i85x_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
-	return (phys_addr_t)i85x_mem_size() - i85x_tseg_size() - stolen_size;
+	return i85x_mem_size() - i85x_tseg_size() - stolen_size;
 }
 
-static phys_addr_t __init i865_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i865_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
 	u16 toud = 0;
 
 	toud = read_pci_config_16(0, 0, 0, I865_TOUD);
 
-	return (phys_addr_t)(toud << 16) + i845_tseg_size();
+	return (toud * KB(64)) + i845_tseg_size();
 }
 
-static phys_addr_t __init gen3_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init gen3_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
 	u32 bsm;
 
@@ -337,10 +337,10 @@ static phys_addr_t __init gen3_stolen_base(int num, int slot, int func,
 	 */
 	bsm = read_pci_config(num, slot, func, INTEL_BSM);
 
-	return (phys_addr_t)bsm & INTEL_BSM_MASK;
+	return bsm & INTEL_BSM_MASK;
 }
 
-static size_t __init i830_stolen_size(int num, int slot, int func)
+static resource_size_t __init i830_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -361,7 +361,7 @@ static size_t __init i830_stolen_size(int num, int slot, int func)
 	return 0;
 }
 
-static size_t __init gen3_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen3_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -390,7 +390,7 @@ static size_t __init gen3_stolen_size(int num, int slot, int func)
 	return 0;
 }
 
-static size_t __init gen6_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen6_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -398,10 +398,10 @@ static size_t __init gen6_stolen_size(int num, int slot, int func)
 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
 	gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK;
 
-	return (size_t)gms * MB(32);
+	return gms * MB(32);
 }
 
-static size_t __init gen8_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen8_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -409,10 +409,10 @@ static size_t __init gen8_stolen_size(int num, int slot, int func)
 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
 	gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK;
 
-	return (size_t)gms * MB(32);
+	return gms * MB(32);
 }
 
-static size_t __init chv_stolen_size(int num, int slot, int func)
+static resource_size_t __init chv_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -426,14 +426,14 @@ static size_t __init chv_stolen_size(int num, int slot, int func)
 	 * 0x17 to 0x1d: 4MB increments start at 36MB
 	 */
 	if (gms < 0x11)
-		return (size_t)gms * MB(32);
+		return gms * MB(32);
 	else if (gms < 0x17)
-		return (size_t)(gms - 0x11 + 2) * MB(4);
+		return (gms - 0x11 + 2) * MB(4);
 	else
-		return (size_t)(gms - 0x17 + 9) * MB(4);
+		return (gms - 0x17 + 9) * MB(4);
 }
 
-static size_t __init gen9_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -444,14 +444,15 @@ static size_t __init gen9_stolen_size(int num, int slot, int func)
 	/* 0x0  to 0xef: 32MB increments starting at 0MB */
 	/* 0xf0 to 0xfe: 4MB increments starting at 4MB */
 	if (gms < 0xf0)
-		return (size_t)gms * MB(32);
+		return gms * MB(32);
 	else
-		return (size_t)(gms - 0xf0 + 1) * MB(4);
+		return (gms - 0xf0 + 1) * MB(4);
 }
 
 struct intel_early_ops {
-	size_t (*stolen_size)(int num, int slot, int func);
-	phys_addr_t (*stolen_base)(int num, int slot, int func, size_t size);
+	resource_size_t (*stolen_size)(int num, int slot, int func);
+	resource_size_t (*stolen_base)(int num, int slot, int func,
+				       resource_size_t size);
 };
 
 static const struct intel_early_ops i830_early_ops __initconst = {
@@ -531,12 +532,15 @@ static const struct pci_device_id intel_early_ids[] __initconst = {
 	INTEL_CNL_IDS(&gen9_early_ops),
 };
 
+struct resource intel_graphics_stolen_res = DEFINE_RES_MEM(0, 0);
+EXPORT_SYMBOL(intel_graphics_stolen_res);
+
 static void __init
 intel_graphics_stolen(int num, int slot, int func,
 		      const struct intel_early_ops *early_ops)
 {
-	phys_addr_t base, end;
-	size_t size;
+	resource_size_t base, size;
+	resource_size_t end;
 
 	size = early_ops->stolen_size(num, slot, func);
 	base = early_ops->stolen_base(num, slot, func, size);
@@ -545,8 +549,12 @@ intel_graphics_stolen(int num, int slot, int func,
 		return;
 
 	end = base + size - 1;
-	printk(KERN_INFO "Reserving Intel graphics memory at %pa-%pa\n",
-	       &base, &end);
+
+	intel_graphics_stolen_res.start = base;
+	intel_graphics_stolen_res.end = end;
+
+	printk(KERN_INFO "Reserving Intel graphics memory at %pR\n",
+	       &intel_graphics_stolen_res);
 
 	/* Mark this space as reserved */
 	e820__range_add(base, size, E820_TYPE_RESERVED);
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 4e1b274e1164..c9e5a6621b95 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -36,6 +36,9 @@ extern bool i915_gpu_lower(void);
 extern bool i915_gpu_busy(void);
 extern bool i915_gpu_turbo_disable(void);
 
+/* Exported from arch/x86/kernel/early-quirks.c */
+extern struct resource intel_graphics_stolen_res;
+
 /*
  * The Bridge device's PCI config space has information about the
  * fb aperture size and the amount of pre-reserved memory.
-- 
2.14.3

[PATCH 01/10] x86/early-quirks: Extend Intel graphics stolen memory placement to 64bit

[Matthew Auld]

From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

To give upcoming SKU BIOSes more flexibility in placing the Intel
graphics stolen memory, make all variables storing the placement or size
compatible with full 64 bit range. Also by exporting the stolen region
as a resource, we can then nuke the duplicated stolen discovery in i915.

v2: export the stolen region as a resource
    fix u16 << 16 (Chris)
v3: actually fix u16 << 16

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
---
 arch/x86/kernel/early-quirks.c | 86 +++++++++++++++++++++++-------------------
 include/drm/i915_drm.h         |  3 ++
 2 files changed, 50 insertions(+), 39 deletions(-)

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 1e82f787c160..d7236e2f5eed 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -243,7 +243,7 @@ static void __init intel_remapping_check(int num, int slot, int func)
 #define KB(x)	((x) * 1024UL)
 #define MB(x)	(KB (KB (x)))
 
-static size_t __init i830_tseg_size(void)
+static resource_size_t __init i830_tseg_size(void)
 {
 	u8 esmramc = read_pci_config_byte(0, 0, 0, I830_ESMRAMC);
 
@@ -256,7 +256,7 @@ static size_t __init i830_tseg_size(void)
 		return KB(512);
 }
 
-static size_t __init i845_tseg_size(void)
+static resource_size_t __init i845_tseg_size(void)
 {
 	u8 esmramc = read_pci_config_byte(0, 0, 0, I845_ESMRAMC);
 	u8 tseg_size = esmramc & I845_TSEG_SIZE_MASK;
@@ -273,7 +273,7 @@ static size_t __init i845_tseg_size(void)
 	return 0;
 }
 
-static size_t __init i85x_tseg_size(void)
+static resource_size_t __init i85x_tseg_size(void)
 {
 	u8 esmramc = read_pci_config_byte(0, 0, 0, I85X_ESMRAMC);
 
@@ -283,12 +283,12 @@ static size_t __init i85x_tseg_size(void)
 	return MB(1);
 }
 
-static size_t __init i830_mem_size(void)
+static resource_size_t __init i830_mem_size(void)
 {
 	return read_pci_config_byte(0, 0, 0, I830_DRB3) * MB(32);
 }
 
-static size_t __init i85x_mem_size(void)
+static resource_size_t __init i85x_mem_size(void)
 {
 	return read_pci_config_byte(0, 0, 1, I85X_DRB3) * MB(32);
 }
@@ -297,36 +297,36 @@ static size_t __init i85x_mem_size(void)
  * On 830/845/85x the stolen memory base isn't available in any
  * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
  */
-static phys_addr_t __init i830_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i830_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
-	return (phys_addr_t)i830_mem_size() - i830_tseg_size() - stolen_size;
+	return i830_mem_size() - i830_tseg_size() - stolen_size;
 }
 
-static phys_addr_t __init i845_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i845_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
-	return (phys_addr_t)i830_mem_size() - i845_tseg_size() - stolen_size;
+	return i830_mem_size() - i845_tseg_size() - stolen_size;
 }
 
-static phys_addr_t __init i85x_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i85x_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
-	return (phys_addr_t)i85x_mem_size() - i85x_tseg_size() - stolen_size;
+	return i85x_mem_size() - i85x_tseg_size() - stolen_size;
 }
 
-static phys_addr_t __init i865_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init i865_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
 	u16 toud = 0;
 
 	toud = read_pci_config_16(0, 0, 0, I865_TOUD);
 
-	return (phys_addr_t)(toud << 16) + i845_tseg_size();
+	return (toud * KB(64)) + i845_tseg_size();
 }
 
-static phys_addr_t __init gen3_stolen_base(int num, int slot, int func,
-					   size_t stolen_size)
+static resource_size_t __init gen3_stolen_base(int num, int slot, int func,
+					       resource_size_t stolen_size)
 {
 	u32 bsm;
 
@@ -337,10 +337,10 @@ static phys_addr_t __init gen3_stolen_base(int num, int slot, int func,
 	 */
 	bsm = read_pci_config(num, slot, func, INTEL_BSM);
 
-	return (phys_addr_t)bsm & INTEL_BSM_MASK;
+	return bsm & INTEL_BSM_MASK;
 }
 
-static size_t __init i830_stolen_size(int num, int slot, int func)
+static resource_size_t __init i830_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -361,7 +361,7 @@ static size_t __init i830_stolen_size(int num, int slot, int func)
 	return 0;
 }
 
-static size_t __init gen3_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen3_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -390,7 +390,7 @@ static size_t __init gen3_stolen_size(int num, int slot, int func)
 	return 0;
 }
 
-static size_t __init gen6_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen6_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -398,10 +398,10 @@ static size_t __init gen6_stolen_size(int num, int slot, int func)
 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
 	gms = (gmch_ctrl >> SNB_GMCH_GMS_SHIFT) & SNB_GMCH_GMS_MASK;
 
-	return (size_t)gms * MB(32);
+	return gms * MB(32);
 }
 
-static size_t __init gen8_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen8_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -409,10 +409,10 @@ static size_t __init gen8_stolen_size(int num, int slot, int func)
 	gmch_ctrl = read_pci_config_16(num, slot, func, SNB_GMCH_CTRL);
 	gms = (gmch_ctrl >> BDW_GMCH_GMS_SHIFT) & BDW_GMCH_GMS_MASK;
 
-	return (size_t)gms * MB(32);
+	return gms * MB(32);
 }
 
-static size_t __init chv_stolen_size(int num, int slot, int func)
+static resource_size_t __init chv_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -426,14 +426,14 @@ static size_t __init chv_stolen_size(int num, int slot, int func)
 	 * 0x17 to 0x1d: 4MB increments start at 36MB
 	 */
 	if (gms < 0x11)
-		return (size_t)gms * MB(32);
+		return gms * MB(32);
 	else if (gms < 0x17)
-		return (size_t)(gms - 0x11 + 2) * MB(4);
+		return (gms - 0x11 + 2) * MB(4);
 	else
-		return (size_t)(gms - 0x17 + 9) * MB(4);
+		return (gms - 0x17 + 9) * MB(4);
 }
 
-static size_t __init gen9_stolen_size(int num, int slot, int func)
+static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
 {
 	u16 gmch_ctrl;
 	u16 gms;
@@ -444,14 +444,15 @@ static size_t __init gen9_stolen_size(int num, int slot, int func)
 	/* 0x0  to 0xef: 32MB increments starting at 0MB */
 	/* 0xf0 to 0xfe: 4MB increments starting at 4MB */
 	if (gms < 0xf0)
-		return (size_t)gms * MB(32);
+		return gms * MB(32);
 	else
-		return (size_t)(gms - 0xf0 + 1) * MB(4);
+		return (gms - 0xf0 + 1) * MB(4);
 }
 
 struct intel_early_ops {
-	size_t (*stolen_size)(int num, int slot, int func);
-	phys_addr_t (*stolen_base)(int num, int slot, int func, size_t size);
+	resource_size_t (*stolen_size)(int num, int slot, int func);
+	resource_size_t (*stolen_base)(int num, int slot, int func,
+				       resource_size_t size);
 };
 
 static const struct intel_early_ops i830_early_ops __initconst = {
@@ -531,12 +532,15 @@ static const struct pci_device_id intel_early_ids[] __initconst = {
 	INTEL_CNL_IDS(&gen9_early_ops),
 };
 
+struct resource intel_graphics_stolen_res = DEFINE_RES_MEM(0, 0);
+EXPORT_SYMBOL(intel_graphics_stolen_res);
+
 static void __init
 intel_graphics_stolen(int num, int slot, int func,
 		      const struct intel_early_ops *early_ops)
 {
-	phys_addr_t base, end;
-	size_t size;
+	resource_size_t base, size;
+	resource_size_t end;
 
 	size = early_ops->stolen_size(num, slot, func);
 	base = early_ops->stolen_base(num, slot, func, size);
@@ -545,8 +549,12 @@ intel_graphics_stolen(int num, int slot, int func,
 		return;
 
 	end = base + size - 1;
-	printk(KERN_INFO "Reserving Intel graphics memory at %pa-%pa\n",
-	       &base, &end);
+
+	intel_graphics_stolen_res.start = base;
+	intel_graphics_stolen_res.end = end;
+
+	printk(KERN_INFO "Reserving Intel graphics memory at %pR\n",
+	       &intel_graphics_stolen_res);
 
 	/* Mark this space as reserved */
 	e820__range_add(base, size, E820_TYPE_RESERVED);
diff --git a/include/drm/i915_drm.h b/include/drm/i915_drm.h
index 4e1b274e1164..c9e5a6621b95 100644
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -36,6 +36,9 @@ extern bool i915_gpu_lower(void);
 extern bool i915_gpu_busy(void);
 extern bool i915_gpu_turbo_disable(void);
 
+/* Exported from arch/x86/kernel/early-quirks.c */
+extern struct resource intel_graphics_stolen_res;
+
 /*
  * The Bridge device's PCI config space has information about the
  * fb aperture size and the amount of pre-reserved memory.
-- 
2.14.3

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Re: [PATCH 01/10] x86/early-quirks: Extend Intel graphics stolen memory placement to 64bit

[Chris Wilson]

Quoting Matthew Auld (2017-12-06 18:17:21)
> From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> 
> To give upcoming SKU BIOSes more flexibility in placing the Intel
> graphics stolen memory, make all variables storing the placement or size
> compatible with full 64 bit range. Also by exporting the stolen region
> as a resource, we can then nuke the duplicated stolen discovery in i915.
> 
> v2: export the stolen region as a resource
>     fix u16 << 16 (Chris)
> v3: actually fix u16 << 16
> 
> Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: H. Peter Anvin <hpa@zytor.com>
> Cc: x86@kernel.org
> Cc: linux-kernel@vger.kernel.org
> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
> ---
> +static resource_size_t __init i865_stolen_base(int num, int slot, int func,
> +                                              resource_size_t stolen_size)
>  {
>         u16 toud = 0;
>  
>         toud = read_pci_config_16(0, 0, 0, I865_TOUD);
>  
> -       return (phys_addr_t)(toud << 16) + i845_tseg_size();
> +       return (toud * KB(64)) + i845_tseg_size();

Overkill on the brackets.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
-Chris
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[PATCH 02/10] x86/early-quirks: replace the magical increment start values

Replace the magical +2, +9 etc. with +MB, which is far easier to read.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 arch/x86/kernel/early-quirks.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index d7236e2f5eed..b5b912f3dce8 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -428,9 +428,9 @@ static resource_size_t __init chv_stolen_size(int num, int slot, int func)
 	if (gms < 0x11)
 		return gms * MB(32);
 	else if (gms < 0x17)
-		return (gms - 0x11 + 2) * MB(4);
+		return (gms - 0x11) * MB(4) + MB(8);
 	else
-		return (gms - 0x17 + 9) * MB(4);
+		return (gms - 0x17) * MB(4) + MB(36);
 }
 
 static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
@@ -446,7 +446,7 @@ static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
 	if (gms < 0xf0)
 		return gms * MB(32);
 	else
-		return (gms - 0xf0 + 1) * MB(4);
+		return (gms - 0xf0) * MB(4) + MB(4);
 }
 
 struct intel_early_ops {
-- 
2.14.3

[PATCH 02/10] x86/early-quirks: replace the magical increment start values

[Matthew Auld]

Replace the magical +2, +9 etc. with +MB, which is far easier to read.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 arch/x86/kernel/early-quirks.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index d7236e2f5eed..b5b912f3dce8 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -428,9 +428,9 @@ static resource_size_t __init chv_stolen_size(int num, int slot, int func)
 	if (gms < 0x11)
 		return gms * MB(32);
 	else if (gms < 0x17)
-		return (gms - 0x11 + 2) * MB(4);
+		return (gms - 0x11) * MB(4) + MB(8);
 	else
-		return (gms - 0x17 + 9) * MB(4);
+		return (gms - 0x17) * MB(4) + MB(36);
 }
 
 static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
@@ -446,7 +446,7 @@ static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
 	if (gms < 0xf0)
 		return gms * MB(32);
 	else
-		return (gms - 0xf0 + 1) * MB(4);
+		return (gms - 0xf0) * MB(4) + MB(4);
 }
 
 struct intel_early_ops {
-- 
2.14.3

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[PATCH 03/10] x86/early-quirks: reverse the if ladders

[Matthew Auld]

Makes things a little easier to follow.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 arch/x86/kernel/early-quirks.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index b5b912f3dce8..ba6e96381bfc 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -425,12 +425,12 @@ static resource_size_t __init chv_stolen_size(int num, int slot, int func)
 	 * 0x11 to 0x16: 4MB increments starting at 8MB
 	 * 0x17 to 0x1d: 4MB increments start at 36MB
 	 */
-	if (gms < 0x11)
-		return gms * MB(32);
-	else if (gms < 0x17)
+	if (gms >= 0x17)
+		return (gms - 0x17) * MB(4) + MB(36);
+	else if (gms >= 0x11)
 		return (gms - 0x11) * MB(4) + MB(8);
 	else
-		return (gms - 0x17) * MB(4) + MB(36);
+		return gms * MB(32);
 }
 
 static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
@@ -443,10 +443,10 @@ static resource_size_t __init gen9_stolen_size(int num, int slot, int func)
 
 	/* 0x0  to 0xef: 32MB increments starting at 0MB */
 	/* 0xf0 to 0xfe: 4MB increments starting at 4MB */
-	if (gms < 0xf0)
-		return gms * MB(32);
-	else
+	if (gms >= 0xf0)
 		return (gms - 0xf0) * MB(4) + MB(4);
+	else
+		return gms * MB(32);
 }
 
 struct intel_early_ops {
-- 
2.14.3

[PATCH 04/10] drm/i915: nuke the duplicated stolen discovery

[Matthew Auld]

We duplicate the stolen discovery code in early-quirks and in i915,
however now that the stolen region is exported as a resource from
early-quirks we can nuke the duplication.

v2: check overflows_type

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_gem_gtt.c    |  51 +--------------
 drivers/gpu/drm/i915/i915_gem_stolen.c | 109 +--------------------------------
 2 files changed, 5 insertions(+), 155 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 209bb111f652..036a79fe252d 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2949,50 +2949,6 @@ static unsigned int chv_get_total_gtt_size(u16 gmch_ctrl)
 	return 0;
 }
 
-static size_t gen6_get_stolen_size(u16 snb_gmch_ctl)
-{
-	snb_gmch_ctl >>= SNB_GMCH_GMS_SHIFT;
-	snb_gmch_ctl &= SNB_GMCH_GMS_MASK;
-	return (size_t)snb_gmch_ctl << 25; /* 32 MB units */
-}
-
-static size_t gen8_get_stolen_size(u16 bdw_gmch_ctl)
-{
-	bdw_gmch_ctl >>= BDW_GMCH_GMS_SHIFT;
-	bdw_gmch_ctl &= BDW_GMCH_GMS_MASK;
-	return (size_t)bdw_gmch_ctl << 25; /* 32 MB units */
-}
-
-static size_t chv_get_stolen_size(u16 gmch_ctrl)
-{
-	gmch_ctrl >>= SNB_GMCH_GMS_SHIFT;
-	gmch_ctrl &= SNB_GMCH_GMS_MASK;
-
-	/*
-	 * 0x0  to 0x10: 32MB increments starting at 0MB
-	 * 0x11 to 0x16: 4MB increments starting at 8MB
-	 * 0x17 to 0x1d: 4MB increments start at 36MB
-	 */
-	if (gmch_ctrl < 0x11)
-		return (size_t)gmch_ctrl << 25;
-	else if (gmch_ctrl < 0x17)
-		return (size_t)(gmch_ctrl - 0x11 + 2) << 22;
-	else
-		return (size_t)(gmch_ctrl - 0x17 + 9) << 22;
-}
-
-static size_t gen9_get_stolen_size(u16 gen9_gmch_ctl)
-{
-	gen9_gmch_ctl >>= BDW_GMCH_GMS_SHIFT;
-	gen9_gmch_ctl &= BDW_GMCH_GMS_MASK;
-
-	if (gen9_gmch_ctl < 0xf0)
-		return (size_t)gen9_gmch_ctl << 25; /* 32 MB units */
-	else
-		/* 4MB increments starting at 0xf0 for 4MB */
-		return (size_t)(gen9_gmch_ctl - 0xf0 + 1) << 22;
-}
-
 static int ggtt_probe_common(struct i915_ggtt *ggtt, u64 size)
 {
 	struct drm_i915_private *dev_priv = ggtt->base.i915;
@@ -3343,14 +3299,13 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
 
 	pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
 
+	ggtt->stolen_size = resource_size(&intel_graphics_stolen_res);
+
 	if (INTEL_GEN(dev_priv) >= 9) {
-		ggtt->stolen_size = gen9_get_stolen_size(snb_gmch_ctl);
 		size = gen8_get_total_gtt_size(snb_gmch_ctl);
 	} else if (IS_CHERRYVIEW(dev_priv)) {
-		ggtt->stolen_size = chv_get_stolen_size(snb_gmch_ctl);
 		size = chv_get_total_gtt_size(snb_gmch_ctl);
 	} else {
-		ggtt->stolen_size = gen8_get_stolen_size(snb_gmch_ctl);
 		size = gen8_get_total_gtt_size(snb_gmch_ctl);
 	}
 
@@ -3408,7 +3363,7 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt)
 		DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err);
 	pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
 
-	ggtt->stolen_size = gen6_get_stolen_size(snb_gmch_ctl);
+	ggtt->stolen_size = resource_size(&intel_graphics_stolen_res);
 
 	size = gen6_get_total_gtt_size(snb_gmch_ctl);
 	ggtt->base.total = (size / sizeof(gen6_pte_t)) << PAGE_SHIFT;
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 1877ae9a1d9b..f8ac1438c35d 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -30,9 +30,6 @@
 #include <drm/i915_drm.h>
 #include "i915_drv.h"
 
-#define KB(x) ((x) * 1024)
-#define MB(x) (KB(x) * 1024)
-
 /*
  * The BIOS typically reserves some of the system's memory for the exclusive
  * use of the integrated graphics. This memory is no longer available for
@@ -81,113 +78,11 @@ void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
 
 static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
 {
-	struct pci_dev *pdev = dev_priv->drm.pdev;
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
+	dma_addr_t base = intel_graphics_stolen_res.start;
 	struct resource *r;
-	dma_addr_t base;
-
-	/* Almost universally we can find the Graphics Base of Stolen Memory
-	 * at register BSM (0x5c) in the igfx configuration space. On a few
-	 * (desktop) machines this is also mirrored in the bridge device at
-	 * different locations, or in the MCHBAR.
-	 *
-	 * On 865 we just check the TOUD register.
-	 *
-	 * On 830/845/85x the stolen memory base isn't available in any
-	 * register. We need to calculate it as TOM-TSEG_SIZE-stolen_size.
-	 *
-	 */
-	base = 0;
-	if (INTEL_GEN(dev_priv) >= 3) {
-		u32 bsm;
-
-		pci_read_config_dword(pdev, INTEL_BSM, &bsm);
-
-		base = bsm & INTEL_BSM_MASK;
-	} else if (IS_I865G(dev_priv)) {
-		u32 tseg_size = 0;
-		u16 toud = 0;
-		u8 tmp;
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0),
-					 I845_ESMRAMC, &tmp);
-
-		if (tmp & TSEG_ENABLE) {
-			switch (tmp & I845_TSEG_SIZE_MASK) {
-			case I845_TSEG_SIZE_512K:
-				tseg_size = KB(512);
-				break;
-			case I845_TSEG_SIZE_1M:
-				tseg_size = MB(1);
-				break;
-			}
-		}
-
-		pci_bus_read_config_word(pdev->bus, PCI_DEVFN(0, 0),
-					 I865_TOUD, &toud);
-
-		base = (toud << 16) + tseg_size;
-	} else if (IS_I85X(dev_priv)) {
-		u32 tseg_size = 0;
-		u32 tom;
-		u8 tmp;
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0),
-					 I85X_ESMRAMC, &tmp);
-
-		if (tmp & TSEG_ENABLE)
-			tseg_size = MB(1);
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 1),
-					 I85X_DRB3, &tmp);
-		tom = tmp * MB(32);
-
-		base = tom - tseg_size - ggtt->stolen_size;
-	} else if (IS_I845G(dev_priv)) {
-		u32 tseg_size = 0;
-		u32 tom;
-		u8 tmp;
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0),
-					 I845_ESMRAMC, &tmp);
-
-		if (tmp & TSEG_ENABLE) {
-			switch (tmp & I845_TSEG_SIZE_MASK) {
-			case I845_TSEG_SIZE_512K:
-				tseg_size = KB(512);
-				break;
-			case I845_TSEG_SIZE_1M:
-				tseg_size = MB(1);
-				break;
-			}
-		}
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0),
-					 I830_DRB3, &tmp);
-		tom = tmp * MB(32);
 
-		base = tom - tseg_size - ggtt->stolen_size;
-	} else if (IS_I830(dev_priv)) {
-		u32 tseg_size = 0;
-		u32 tom;
-		u8 tmp;
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0),
-					 I830_ESMRAMC, &tmp);
-
-		if (tmp & TSEG_ENABLE) {
-			if (tmp & I830_TSEG_SIZE_1M)
-				tseg_size = MB(1);
-			else
-				tseg_size = KB(512);
-		}
-
-		pci_bus_read_config_byte(pdev->bus, PCI_DEVFN(0, 0),
-					 I830_DRB3, &tmp);
-		tom = tmp * MB(32);
-
-		base = tom - tseg_size - ggtt->stolen_size;
-	}
+	GEM_BUG_ON(overflows_type(intel_graphics_stolen_res.start, base));
 
 	if (base == 0 || add_overflows(base, ggtt->stolen_size))
 		return 0;
-- 
2.14.3

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[PATCH 05/10] drm/i915: make dsm struct resource centric

[Matthew Auld]

Now that we are using struct resource to track the stolen region, it is
more convenient if we track dsm in a resource as well.

v2: check range_overflow when writing to 32b registers (Chris)
    pepper in some comments (Chris)
v3: refit i915_stolen_to_dma()
v4: kill ggtt->stolen_size

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/char/agp/intel-gtt.c           |   2 -
 drivers/gpu/drm/i915/i915_drv.h        |  12 +++-
 drivers/gpu/drm/i915/i915_gem_gtt.c    |   8 +--
 drivers/gpu/drm/i915/i915_gem_gtt.h    |   1 -
 drivers/gpu/drm/i915/i915_gem_stolen.c | 111 +++++++++++++++------------------
 drivers/gpu/drm/i915/intel_fbc.c       |  13 ++--
 drivers/gpu/drm/i915/intel_pm.c        |  15 +++--
 include/drm/intel-gtt.h                |   1 -
 8 files changed, 81 insertions(+), 82 deletions(-)

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 9b6b6023193b..050708e4562e 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1422,12 +1422,10 @@ int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,
 EXPORT_SYMBOL(intel_gmch_probe);
 
 void intel_gtt_get(u64 *gtt_total,
-		   u32 *stolen_size,
 		   phys_addr_t *mappable_base,
 		   u64 *mappable_end)
 {
 	*gtt_total = intel_private.gtt_total_entries << PAGE_SHIFT;
-	*stolen_size = intel_private.stolen_size;
 	*mappable_base = intel_private.gma_bus_addr;
 	*mappable_end = intel_private.gtt_mappable_entries << PAGE_SHIFT;
 }
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 02551c781f0a..e88fab552278 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1537,9 +1537,6 @@ struct i915_gem_mm {
 	 */
 	struct pagevec wc_stash;
 
-	/** Usable portion of the GTT for GEM */
-	dma_addr_t stolen_base; /* limited to low memory (32-bit) */
-
 	/**
 	 * tmpfs instance used for shmem backed objects
 	 */
@@ -2253,6 +2250,15 @@ struct drm_i915_private {
 
 	const struct intel_device_info info;
 
+	/**
+	 * Data Stolen Memory - aka "i915 stolen memory" gives us the start and
+	 * end of stolen which we can optionally use to create GEM objects
+	 * backed by stolen memory. Note that ggtt->stolen_usable_size tells us
+	 * exactly how much of this we are actually allowed to use, given that
+	 * some portion of it is in fact reserved for use by hardware functions.
+	 */
+	struct resource dsm;
+
 	void __iomem *regs;
 
 	struct intel_uncore uncore;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 036a79fe252d..62dd90e00c3a 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3299,8 +3299,6 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
 
 	pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
 
-	ggtt->stolen_size = resource_size(&intel_graphics_stolen_res);
-
 	if (INTEL_GEN(dev_priv) >= 9) {
 		size = gen8_get_total_gtt_size(snb_gmch_ctl);
 	} else if (IS_CHERRYVIEW(dev_priv)) {
@@ -3363,8 +3361,6 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt)
 		DRM_ERROR("Can't set DMA mask/consistent mask (%d)\n", err);
 	pci_read_config_word(pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
 
-	ggtt->stolen_size = resource_size(&intel_graphics_stolen_res);
-
 	size = gen6_get_total_gtt_size(snb_gmch_ctl);
 	ggtt->base.total = (size / sizeof(gen6_pte_t)) << PAGE_SHIFT;
 
@@ -3410,7 +3406,6 @@ static int i915_gmch_probe(struct i915_ggtt *ggtt)
 	}
 
 	intel_gtt_get(&ggtt->base.total,
-		      &ggtt->stolen_size,
 		      &ggtt->mappable_base,
 		      &ggtt->mappable_end);
 
@@ -3482,7 +3477,8 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
 	DRM_INFO("Memory usable by graphics device = %lluM\n",
 		 ggtt->base.total >> 20);
 	DRM_DEBUG_DRIVER("GMADR size = %lldM\n", ggtt->mappable_end >> 20);
-	DRM_DEBUG_DRIVER("GTT stolen size = %uM\n", ggtt->stolen_size >> 20);
+	DRM_DEBUG_DRIVER("GTT stolen size = %lluM\n",
+			 (u64)resource_size(&intel_graphics_stolen_res) >> 20);
 	if (intel_vtd_active())
 		DRM_INFO("VT-d active for gfx access\n");
 
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 93211a96fdad..30a2920b1291 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -381,7 +381,6 @@ struct i915_ggtt {
 	 * avoid the first page! The upper end of stolen memory is reserved for
 	 * hardware functions and similarly removed from the accessible range.
 	 */
-	u32 stolen_size;		/* Total size of stolen memory */
 	u32 stolen_usable_size;	/* Total size minus reserved ranges */
 	u32 stolen_reserved_base;
 	u32 stolen_reserved_size;
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index f8ac1438c35d..f2ef5c3788b9 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -76,27 +76,24 @@ void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
 	mutex_unlock(&dev_priv->mm.stolen_lock);
 }
 
-static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
+static int i915_adjust_stolen(struct drm_i915_private *dev_priv,
+			      struct resource *dsm)
 {
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
-	dma_addr_t base = intel_graphics_stolen_res.start;
 	struct resource *r;
 
-	GEM_BUG_ON(overflows_type(intel_graphics_stolen_res.start, base));
+	if (dsm->start == 0 || add_overflows(dsm->start, resource_size(dsm)))
+		return -EINVAL;
 
-	if (base == 0 || add_overflows(base, ggtt->stolen_size))
-		return 0;
-
-	/* make sure we don't clobber the GTT if it's within stolen memory */
+	/* Make sure we don't clobber the GTT if it's within stolen memory */
 	if (INTEL_GEN(dev_priv) <= 4 &&
 	    !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
-		struct {
-			dma_addr_t start, end;
-		} stolen[2] = {
-			{ .start = base, .end = base + ggtt->stolen_size, },
-			{ .start = base, .end = base + ggtt->stolen_size, },
+		struct resource stolen[2] = {
+			DEFINE_RES_MEM(dsm->start, resource_size(dsm)),
+			DEFINE_RES_MEM(dsm->start, resource_size(dsm)),
 		};
-		u64 ggtt_start, ggtt_end;
+		struct resource ggtt_res;
+		u64 ggtt_start;
 
 		ggtt_start = I915_READ(PGTBL_CTL);
 		if (IS_GEN4(dev_priv))
@@ -104,70 +101,63 @@ static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
 				     (ggtt_start & PGTBL_ADDRESS_HI_MASK) << 28;
 		else
 			ggtt_start &= PGTBL_ADDRESS_LO_MASK;
-		ggtt_end = ggtt_start + ggtt_total_entries(ggtt) * 4;
 
-		if (ggtt_start >= stolen[0].start && ggtt_start < stolen[0].end)
-			stolen[0].end = ggtt_start;
-		if (ggtt_end > stolen[1].start && ggtt_end <= stolen[1].end)
-			stolen[1].start = ggtt_end;
+		ggtt_res =
+			(struct resource) DEFINE_RES_MEM(ggtt_start,
+							 ggtt_total_entries(ggtt) * 4);
+
+		if (ggtt_res.start >= stolen[0].start && ggtt_res.start < stolen[0].end)
+			stolen[0].end = ggtt_res.start;
+		if (ggtt_res.end > stolen[1].start && ggtt_res.end <= stolen[1].end)
+			stolen[1].start = ggtt_res.end;
 
 		/* pick the larger of the two chunks */
-		if (stolen[0].end - stolen[0].start >
-		    stolen[1].end - stolen[1].start) {
-			base = stolen[0].start;
-			ggtt->stolen_size = stolen[0].end - stolen[0].start;
-		} else {
-			base = stolen[1].start;
-			ggtt->stolen_size = stolen[1].end - stolen[1].start;
-		}
+		if (resource_size(&stolen[0]) > resource_size(&stolen[1]))
+			*dsm = stolen[0];
+		else
+			*dsm = stolen[1];
 
 		if (stolen[0].start != stolen[1].start ||
 		    stolen[0].end != stolen[1].end) {
-			dma_addr_t end = base + ggtt->stolen_size - 1;
-
-			DRM_DEBUG_KMS("GTT within stolen memory at 0x%llx-0x%llx\n",
-				      (unsigned long long)ggtt_start,
-				      (unsigned long long)ggtt_end - 1);
-			DRM_DEBUG_KMS("Stolen memory adjusted to %pad - %pad\n",
-				      &base, &end);
+			DRM_DEBUG_KMS("GTT within stolen memory at %pR\n", &ggtt_res);
+			DRM_DEBUG_KMS("Stolen memory adjusted to %pR\n", dsm);
 		}
 	}
 
-
 	/* Verify that nothing else uses this physical address. Stolen
 	 * memory should be reserved by the BIOS and hidden from the
 	 * kernel. So if the region is already marked as busy, something
 	 * is seriously wrong.
 	 */
-	r = devm_request_mem_region(dev_priv->drm.dev, base, ggtt->stolen_size,
+	r = devm_request_mem_region(dev_priv->drm.dev, dsm->start,
+				    resource_size(dsm),
 				    "Graphics Stolen Memory");
 	if (r == NULL) {
 		/*
 		 * One more attempt but this time requesting region from
-		 * base + 1, as we have seen that this resolves the region
+		 * start + 1, as we have seen that this resolves the region
 		 * conflict with the PCI Bus.
 		 * This is a BIOS w/a: Some BIOS wrap stolen in the root
 		 * PCI bus, but have an off-by-one error. Hence retry the
 		 * reservation starting from 1 instead of 0.
 		 * There's also BIOS with off-by-one on the other end.
 		 */
-		r = devm_request_mem_region(dev_priv->drm.dev, base + 1,
-					    ggtt->stolen_size - 2,
+		r = devm_request_mem_region(dev_priv->drm.dev, dsm->start + 1,
+					    resource_size(dsm) - 2,
 					    "Graphics Stolen Memory");
 		/*
 		 * GEN3 firmware likes to smash pci bridges into the stolen
 		 * range. Apparently this works.
 		 */
 		if (r == NULL && !IS_GEN3(dev_priv)) {
-			dma_addr_t end = base + ggtt->stolen_size;
+			DRM_ERROR("conflict detected with stolen region: %pR\n",
+				  dsm);
 
-			DRM_ERROR("conflict detected with stolen region: [%pad - %pad]\n",
-				  &base, &end);
-			base = 0;
+			return -EBUSY;
 		}
 	}
 
-	return base;
+	return 0;
 }
 
 void i915_gem_cleanup_stolen(struct drm_device *dev)
@@ -183,11 +173,10 @@ void i915_gem_cleanup_stolen(struct drm_device *dev)
 static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
 				    dma_addr_t *base, u32 *size)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
 				     CTG_STOLEN_RESERVED :
 				     ELK_STOLEN_RESERVED);
-	dma_addr_t stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
+	dma_addr_t stolen_top = dev_priv->dsm.end + 1;
 
 	if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0) {
 		*base = 0;
@@ -308,7 +297,6 @@ static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv,
 static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
 				    dma_addr_t *base, u32 *size)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
 	dma_addr_t stolen_top;
 
@@ -318,7 +306,7 @@ static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
 		return;
 	}
 
-	stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
+	stolen_top = dev_priv->dsm.end + 1;
 
 	*base = reg_val & GEN6_STOLEN_RESERVED_ADDR_MASK;
 
@@ -351,14 +339,18 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 		return 0;
 	}
 
-	if (ggtt->stolen_size == 0)
+	if (resource_size(&intel_graphics_stolen_res) == 0)
 		return 0;
 
-	dev_priv->mm.stolen_base = i915_stolen_to_dma(dev_priv);
-	if (dev_priv->mm.stolen_base == 0)
+	dev_priv->dsm = intel_graphics_stolen_res;
+
+	if (i915_adjust_stolen(dev_priv, &dev_priv->dsm))
 		return 0;
 
-	stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
+	GEM_BUG_ON(dev_priv->dsm.start == 0);
+	GEM_BUG_ON(resource_size(&dev_priv->dsm) == 0);
+
+	stolen_top = dev_priv->dsm.end + 1;
 	reserved_base = 0;
 	reserved_size = 0;
 
@@ -399,12 +391,12 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 		reserved_base = stolen_top;
 	}
 
-	if (reserved_base < dev_priv->mm.stolen_base ||
+	if (reserved_base < dev_priv->dsm.start ||
 	    reserved_base + reserved_size > stolen_top) {
 		dma_addr_t reserved_top = reserved_base + reserved_size;
 		DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
 			  &reserved_base, &reserved_top,
-			  &dev_priv->mm.stolen_base, &stolen_top);
+			  &dev_priv->dsm.start, &stolen_top);
 		return 0;
 	}
 
@@ -415,9 +407,9 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 	 * memory, so just consider the start. */
 	reserved_total = stolen_top - reserved_base;
 
-	DRM_DEBUG_KMS("Memory reserved for graphics device: %uK, usable: %uK\n",
-		      ggtt->stolen_size >> 10,
-		      (ggtt->stolen_size - reserved_total) >> 10);
+	DRM_DEBUG_KMS("Memory reserved for graphics device: %lluK, usable: %lluK\n",
+		      (u64)resource_size(&dev_priv->dsm) >> 10,
+		      ((u64)resource_size(&dev_priv->dsm) - reserved_total) >> 10);
 
 	stolen_usable_start = 0;
 	/* WaSkipStolenMemoryFirstPage:bdw+ */
@@ -425,7 +417,7 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 		stolen_usable_start = 4096;
 
 	ggtt->stolen_usable_size =
-		ggtt->stolen_size - reserved_total - stolen_usable_start;
+		resource_size(&dev_priv->dsm) - reserved_total - stolen_usable_start;
 
 	/* Basic memrange allocator for stolen space. */
 	drm_mm_init(&dev_priv->mm.stolen, stolen_usable_start,
@@ -442,7 +434,8 @@ i915_pages_create_for_stolen(struct drm_device *dev,
 	struct sg_table *st;
 	struct scatterlist *sg;
 
-	GEM_BUG_ON(range_overflows(offset, size, dev_priv->ggtt.stolen_size));
+	GEM_BUG_ON(range_overflows_t(resource_size_t, offset, size,
+				     resource_size(&dev_priv->dsm)));
 
 	/* We hide that we have no struct page backing our stolen object
 	 * by wrapping the contiguous physical allocation with a fake
@@ -462,7 +455,7 @@ i915_pages_create_for_stolen(struct drm_device *dev,
 	sg->offset = 0;
 	sg->length = size;
 
-	sg_dma_address(sg) = (dma_addr_t)dev_priv->mm.stolen_base + offset;
+	sg_dma_address(sg) = (dma_addr_t)dev_priv->dsm.start + offset;
 	sg_dma_len(sg) = size;
 
 	return st;
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 4aefc658a5cf..f88c1b5dae4c 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -531,7 +531,6 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 				      int size,
 				      int fb_cpp)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	int compression_threshold = 1;
 	int ret;
 	u64 end;
@@ -541,7 +540,7 @@ static int find_compression_threshold(struct drm_i915_private *dev_priv,
 	 * If we enable FBC using a CFB on that memory range we'll get FIFO
 	 * underruns, even if that range is not reserved by the BIOS. */
 	if (IS_BROADWELL(dev_priv) || IS_GEN9_BC(dev_priv))
-		end = ggtt->stolen_size - 8 * 1024 * 1024;
+		end = resource_size(&dev_priv->dsm) - 8 * 1024 * 1024;
 	else
 		end = U64_MAX;
 
@@ -615,10 +614,16 @@ static int intel_fbc_alloc_cfb(struct intel_crtc *crtc)
 
 		fbc->compressed_llb = compressed_llb;
 
+		GEM_BUG_ON(range_overflows_t(u64, dev_priv->dsm.start,
+					     fbc->compressed_fb.start,
+					     U32_MAX));
+		GEM_BUG_ON(range_overflows_t(u64, dev_priv->dsm.start,
+					     fbc->compressed_llb->start,
+					     U32_MAX));
 		I915_WRITE(FBC_CFB_BASE,
-			   dev_priv->mm.stolen_base + fbc->compressed_fb.start);
+			   dev_priv->dsm.start + fbc->compressed_fb.start);
 		I915_WRITE(FBC_LL_BASE,
-			   dev_priv->mm.stolen_base + compressed_llb->start);
+			   dev_priv->dsm.start + compressed_llb->start);
 	}
 
 	DRM_DEBUG_KMS("reserved %llu bytes of contiguous stolen space for FBC, threshold: %d\n",
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5836181d6f8a..79b3fd617de0 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7020,7 +7020,7 @@ static void valleyview_check_pctx(struct drm_i915_private *dev_priv)
 {
 	unsigned long pctx_addr = I915_READ(VLV_PCBR) & ~4095;
 
-	WARN_ON(pctx_addr != dev_priv->mm.stolen_base +
+	WARN_ON(pctx_addr != dev_priv->dsm.start +
 			     dev_priv->vlv_pctx->stolen->start);
 }
 
@@ -7035,7 +7035,6 @@ static void cherryview_check_pctx(struct drm_i915_private *dev_priv)
 
 static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	unsigned long pctx_paddr, paddr;
 	u32 pcbr;
 	int pctx_size = 32*1024;
@@ -7043,8 +7042,8 @@ static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
 	pcbr = I915_READ(VLV_PCBR);
 	if ((pcbr >> VLV_PCBR_ADDR_SHIFT) == 0) {
 		DRM_DEBUG_DRIVER("BIOS didn't set up PCBR, fixing up\n");
-		paddr = (dev_priv->mm.stolen_base +
-			 (ggtt->stolen_size - pctx_size));
+		paddr = dev_priv->dsm.end + 1 - pctx_size;
+		GEM_BUG_ON(paddr > U32_MAX);
 
 		pctx_paddr = (paddr & (~4095));
 		I915_WRITE(VLV_PCBR, pctx_paddr);
@@ -7065,7 +7064,7 @@ static void valleyview_setup_pctx(struct drm_i915_private *dev_priv)
 		/* BIOS set it up already, grab the pre-alloc'd space */
 		int pcbr_offset;
 
-		pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
+		pcbr_offset = (pcbr & (~4095)) - dev_priv->dsm.start;
 		pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv,
 								      pcbr_offset,
 								      I915_GTT_OFFSET_NONE,
@@ -7089,7 +7088,11 @@ static void valleyview_setup_pctx(struct drm_i915_private *dev_priv)
 		goto out;
 	}
 
-	pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
+	GEM_BUG_ON(range_overflows_t(u64,
+				     dev_priv->dsm.start,
+				     pctx->stolen->start,
+				     U32_MAX));
+	pctx_paddr = dev_priv->dsm.start + pctx->stolen->start;
 	I915_WRITE(VLV_PCBR, pctx_paddr);
 
 out:
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index c5db7975c640..8c577ca38e2e 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -5,7 +5,6 @@
 #define	_DRM_INTEL_GTT_H
 
 void intel_gtt_get(u64 *gtt_total,
-		   u32 *stolen_size,
 		   phys_addr_t *mappable_base,
 		   u64 *mappable_end);
 
-- 
2.14.3

_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [PATCH 05/10] drm/i915: make dsm struct resource centric

[Chris Wilson]

Quoting Matthew Auld (2017-12-06 18:17:25)
> Now that we are using struct resource to track the stolen region, it is
> more convenient if we track dsm in a resource as well.
> 
> v2: check range_overflow when writing to 32b registers (Chris)
>     pepper in some comments (Chris)
> v3: refit i915_stolen_to_dma()
> v4: kill ggtt->stolen_size
> 
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
> -static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
> +static int i915_adjust_stolen(struct drm_i915_private *dev_priv,
> +                             struct resource *dsm)
>  {
>         struct i915_ggtt *ggtt = &dev_priv->ggtt;
> -       dma_addr_t base = intel_graphics_stolen_res.start;
>         struct resource *r;
>  
> -       GEM_BUG_ON(overflows_type(intel_graphics_stolen_res.start, base));
> +       if (dsm->start == 0 || add_overflows(dsm->start, resource_size(dsm)))

Now s/add_overflows/dsm->end <= dsm->start/

> +               return -EINVAL;
>  
> -       if (base == 0 || add_overflows(base, ggtt->stolen_size))
> -               return 0;
> -
> -       /* make sure we don't clobber the GTT if it's within stolen memory */
> +       /* Make sure we don't clobber the GTT if it's within stolen memory */
>         if (INTEL_GEN(dev_priv) <= 4 &&
>             !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
> -               struct {
> -                       dma_addr_t start, end;
> -               } stolen[2] = {
> -                       { .start = base, .end = base + ggtt->stolen_size, },
> -                       { .start = base, .end = base + ggtt->stolen_size, },
> +               struct resource stolen[2] = {
> +                       DEFINE_RES_MEM(dsm->start, resource_size(dsm)),
> +                       DEFINE_RES_MEM(dsm->start, resource_size(dsm)),

struct resource stolen[2] = { *dsm, *dsm } ?

>                 };
> -               u64 ggtt_start, ggtt_end;
> +               struct resource ggtt_res;
> +               u64 ggtt_start;

>         /* Verify that nothing else uses this physical address. Stolen
>          * memory should be reserved by the BIOS and hidden from the
>          * kernel. So if the region is already marked as busy, something
>          * is seriously wrong.
>          */
> -       r = devm_request_mem_region(dev_priv->drm.dev, base, ggtt->stolen_size,
> +       r = devm_request_mem_region(dev_priv->drm.dev, dsm->start,
> +                                   resource_size(dsm),
>                                     "Graphics Stolen Memory");

A future task is that we really don't need the allocation here anymore,
and should be able to reserve the resource directly.

> @@ -351,14 +339,18 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
>                 return 0;
>         }
>  
> -       if (ggtt->stolen_size == 0)
> +       if (resource_size(&intel_graphics_stolen_res) == 0)
>                 return 0;
>  
> -       dev_priv->mm.stolen_base = i915_stolen_to_dma(dev_priv);
> -       if (dev_priv->mm.stolen_base == 0)
> +       dev_priv->dsm = intel_graphics_stolen_res;
> +
> +       if (i915_adjust_stolen(dev_priv, &dev_priv->dsm))
>                 return 0;
>  
> -       stolen_top = dev_priv->mm.stolen_base + ggtt->stolen_size;
> +       GEM_BUG_ON(dev_priv->dsm.start == 0);
> +       GEM_BUG_ON(resource_size(&dev_priv->dsm) == 0);

GEM_BUG_ON(dsm.end <= dsm.start); instead of size == 0

> +
> +       stolen_top = dev_priv->dsm.end + 1;
>         reserved_base = 0;
>         reserved_size = 0;
>  
> @@ -399,12 +391,12 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
>                 reserved_base = stolen_top;
>         }
>  
> -       if (reserved_base < dev_priv->mm.stolen_base ||
> +       if (reserved_base < dev_priv->dsm.start ||
>             reserved_base + reserved_size > stolen_top) {
>                 dma_addr_t reserved_top = reserved_base + reserved_size;
>                 DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
>                           &reserved_base, &reserved_top,
> -                         &dev_priv->mm.stolen_base, &stolen_top);
> +                         &dev_priv->dsm.start, &stolen_top);

%pR here?

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
-Chris
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Re: [PATCH 05/10] drm/i915: make dsm struct resource centric

[Ville Syrjälä]

On Wed, Dec 06, 2017 at 06:30:33PM +0000, Chris Wilson wrote:
> Quoting Matthew Auld (2017-12-06 18:17:25)
> > Now that we are using struct resource to track the stolen region, it is
> > more convenient if we track dsm in a resource as well.
> > 
> > v2: check range_overflow when writing to 32b registers (Chris)
> >     pepper in some comments (Chris)
> > v3: refit i915_stolen_to_dma()
> > v4: kill ggtt->stolen_size
> > 
> > Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> > Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> > Cc: Chris Wilson <chris@chris-wilson.co.uk>
> > Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> > ---
> > -static dma_addr_t i915_stolen_to_dma(struct drm_i915_private *dev_priv)
> > +static int i915_adjust_stolen(struct drm_i915_private *dev_priv,
> > +                             struct resource *dsm)
> >  {
> >         struct i915_ggtt *ggtt = &dev_priv->ggtt;
> > -       dma_addr_t base = intel_graphics_stolen_res.start;
> >         struct resource *r;
> >  
> > -       GEM_BUG_ON(overflows_type(intel_graphics_stolen_res.start, base));
> > +       if (dsm->start == 0 || add_overflows(dsm->start, resource_size(dsm)))
> 
> Now s/add_overflows/dsm->end <= dsm->start/
> 
> > +               return -EINVAL;
> >  
> > -       if (base == 0 || add_overflows(base, ggtt->stolen_size))
> > -               return 0;
> > -
> > -       /* make sure we don't clobber the GTT if it's within stolen memory */
> > +       /* Make sure we don't clobber the GTT if it's within stolen memory */
> >         if (INTEL_GEN(dev_priv) <= 4 &&
> >             !IS_G33(dev_priv) && !IS_PINEVIEW(dev_priv) && !IS_G4X(dev_priv)) {
> > -               struct {
> > -                       dma_addr_t start, end;
> > -               } stolen[2] = {
> > -                       { .start = base, .end = base + ggtt->stolen_size, },
> > -                       { .start = base, .end = base + ggtt->stolen_size, },
> > +               struct resource stolen[2] = {
> > +                       DEFINE_RES_MEM(dsm->start, resource_size(dsm)),
> > +                       DEFINE_RES_MEM(dsm->start, resource_size(dsm)),
> 
> struct resource stolen[2] = { *dsm, *dsm } ?

BTW I don't think I've ever seen a case where the GTT wasn't at the end
of stolen. So we could simplify this code by making that assumption.

-- 
Ville Syrjälä
Intel OTC
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[PATCH 06/10] drm/i915: make reserved struct resource centric

[Matthew Auld]

Now that we are using struct resource to track the stolen region, it is
more convenient if we track the reserved portion of that region in a
resource as well.

v2: s/<= end + 1/< end/ (Chris)
v3: prefer DEFINE_RES_MEM

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_drv.h        |  4 ++++
 drivers/gpu/drm/i915/i915_gem_gtt.h    |  2 --
 drivers/gpu/drm/i915/i915_gem_stolen.c | 15 ++++++---------
 drivers/gpu/drm/i915/intel_pm.c        |  6 ++----
 4 files changed, 12 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index e88fab552278..40171a7da9d9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2258,6 +2258,10 @@ struct drm_i915_private {
 	 * some portion of it is in fact reserved for use by hardware functions.
 	 */
 	struct resource dsm;
+	/**
+	 * Reseved portion of Data Stolen Memory
+	 */
+	struct resource dsm_reserved;
 
 	void __iomem *regs;
 
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 30a2920b1291..db20c72ecfc8 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -382,8 +382,6 @@ struct i915_ggtt {
 	 * hardware functions and similarly removed from the accessible range.
 	 */
 	u32 stolen_usable_size;	/* Total size minus reserved ranges */
-	u32 stolen_reserved_base;
-	u32 stolen_reserved_size;
 
 	/** "Graphics Stolen Memory" holds the global PTEs */
 	void __iomem *gsm;
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index f2ef5c3788b9..18d8e4556b11 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -391,18 +391,15 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 		reserved_base = stolen_top;
 	}
 
-	if (reserved_base < dev_priv->dsm.start ||
-	    reserved_base + reserved_size > stolen_top) {
-		dma_addr_t reserved_top = reserved_base + reserved_size;
-		DRM_ERROR("Stolen reserved area [%pad - %pad] outside stolen memory [%pad - %pad]\n",
-			  &reserved_base, &reserved_top,
-			  &dev_priv->dsm.start, &stolen_top);
+	dev_priv->dsm_reserved =
+		(struct resource) DEFINE_RES_MEM(reserved_base, reserved_size);
+
+	if (!resource_contains(&dev_priv->dsm, &dev_priv->dsm_reserved)) {
+		DRM_ERROR("Stolen reserved area %pR outside stolen memory %pR\n",
+			  &dev_priv->dsm_reserved, &dev_priv->dsm);
 		return 0;
 	}
 
-	ggtt->stolen_reserved_base = reserved_base;
-	ggtt->stolen_reserved_size = reserved_size;
-
 	/* It is possible for the reserved area to end before the end of stolen
 	 * memory, so just consider the start. */
 	reserved_total = stolen_top - reserved_base;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 79b3fd617de0..57dcf8e1ff30 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6416,7 +6416,6 @@ static void valleyview_disable_rps(struct drm_i915_private *dev_priv)
 
 static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	bool enable_rc6 = true;
 	unsigned long rc6_ctx_base;
 	u32 rc_ctl;
@@ -6441,9 +6440,8 @@ static bool bxt_check_bios_rc6_setup(struct drm_i915_private *dev_priv)
 	 * for this check.
 	 */
 	rc6_ctx_base = I915_READ(RC6_CTX_BASE) & RC6_CTX_BASE_MASK;
-	if (!((rc6_ctx_base >= ggtt->stolen_reserved_base) &&
-	      (rc6_ctx_base + PAGE_SIZE <= ggtt->stolen_reserved_base +
-					ggtt->stolen_reserved_size))) {
+	if (!((rc6_ctx_base >= dev_priv->dsm_reserved.start) &&
+	      (rc6_ctx_base + PAGE_SIZE < dev_priv->dsm_reserved.end))) {
 		DRM_DEBUG_DRIVER("RC6 Base address not as expected.\n");
 		enable_rc6 = false;
 	}
-- 
2.14.3

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[PATCH 07/10] drm/i915: make mappable struct resource centric

[Matthew Auld]

Now that we are using struct resource to track the stolen region, it is
more convenient if we track the mappable region in a resource as well.

v2: prefer iomap and gmadr naming scheme
    prefer DEFINE_RES_MEM

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gvt/gvt.h                |  2 +-
 drivers/gpu/drm/i915/i915_drv.c               |  2 +-
 drivers/gpu/drm/i915/i915_gem.c               |  8 ++++----
 drivers/gpu/drm/i915/i915_gem_execbuffer.c    |  2 +-
 drivers/gpu/drm/i915/i915_gem_gtt.c           | 29 ++++++++++++++++++---------
 drivers/gpu/drm/i915/i915_gem_gtt.h           |  4 ++--
 drivers/gpu/drm/i915/i915_gpu_error.c         |  2 +-
 drivers/gpu/drm/i915/i915_vma.c               |  2 +-
 drivers/gpu/drm/i915/intel_display.c          |  2 +-
 drivers/gpu/drm/i915/intel_overlay.c          |  4 ++--
 drivers/gpu/drm/i915/selftests/i915_gem_gtt.c |  4 ++--
 drivers/gpu/drm/i915/selftests/mock_gtt.c     |  4 ++--
 12 files changed, 37 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 77df9bad5dea..103910a24e4b 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -348,7 +348,7 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt);
 
 /* Aperture/GM space definitions for GVT device */
 #define gvt_aperture_sz(gvt)	  (gvt->dev_priv->ggtt.mappable_end)
-#define gvt_aperture_pa_base(gvt) (gvt->dev_priv->ggtt.mappable_base)
+#define gvt_aperture_pa_base(gvt) (gvt->dev_priv->ggtt.gmadr.start)
 
 #define gvt_ggtt_gm_sz(gvt)	  (gvt->dev_priv->ggtt.base.total)
 #define gvt_ggtt_sz(gvt) \
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 5b1fd5f1defb..54a8fca7e7b2 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -726,7 +726,7 @@ static int i915_kick_out_firmware_fb(struct drm_i915_private *dev_priv)
 	if (!ap)
 		return -ENOMEM;
 
-	ap->ranges[0].base = ggtt->mappable_base;
+	ap->ranges[0].base = ggtt->gmadr.start;
 	ap->ranges[0].size = ggtt->mappable_end;
 
 	primary =
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 80b78fb5daac..ff62e2458dfe 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1099,7 +1099,7 @@ i915_gem_gtt_pread(struct drm_i915_gem_object *obj,
 			page_base += offset & PAGE_MASK;
 		}
 
-		if (gtt_user_read(&ggtt->mappable, page_base, page_offset,
+		if (gtt_user_read(&ggtt->iomap, page_base, page_offset,
 				  user_data, page_length)) {
 			ret = -EFAULT;
 			break;
@@ -1307,7 +1307,7 @@ i915_gem_gtt_pwrite_fast(struct drm_i915_gem_object *obj,
 		 * If the object is non-shmem backed, we retry again with the
 		 * path that handles page fault.
 		 */
-		if (ggtt_write(&ggtt->mappable, page_base, page_offset,
+		if (ggtt_write(&ggtt->iomap, page_base, page_offset,
 			       user_data, page_length)) {
 			ret = -EFAULT;
 			break;
@@ -1953,9 +1953,9 @@ int i915_gem_fault(struct vm_fault *vmf)
 	/* Finally, remap it using the new GTT offset */
 	ret = remap_io_mapping(area,
 			       area->vm_start + (vma->ggtt_view.partial.offset << PAGE_SHIFT),
-			       (ggtt->mappable_base + vma->node.start) >> PAGE_SHIFT,
+			       (ggtt->gmadr.start + vma->node.start) >> PAGE_SHIFT,
 			       min_t(u64, vma->size, area->vm_end - area->vm_start),
-			       &ggtt->mappable);
+			       &ggtt->iomap);
 	if (ret)
 		goto err_fence;
 
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 70ccd63cbf8e..4401068ff468 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1012,7 +1012,7 @@ static void *reloc_iomap(struct drm_i915_gem_object *obj,
 		offset += page << PAGE_SHIFT;
 	}
 
-	vaddr = (void __force *)io_mapping_map_atomic_wc(&ggtt->mappable,
+	vaddr = (void __force *)io_mapping_map_atomic_wc(&ggtt->iomap,
 							 offset);
 	cache->page = page;
 	cache->vaddr = (unsigned long)vaddr;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 62dd90e00c3a..09c425e35b56 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -2912,7 +2912,7 @@ void i915_ggtt_cleanup_hw(struct drm_i915_private *dev_priv)
 	mutex_unlock(&dev_priv->drm.struct_mutex);
 
 	arch_phys_wc_del(ggtt->mtrr);
-	io_mapping_fini(&ggtt->mappable);
+	io_mapping_fini(&ggtt->iomap);
 }
 
 static unsigned int gen6_get_total_gtt_size(u16 snb_gmch_ctl)
@@ -3288,8 +3288,10 @@ static int gen8_gmch_probe(struct i915_ggtt *ggtt)
 	int err;
 
 	/* TODO: We're not aware of mappable constraints on gen8 yet */
-	ggtt->mappable_base = pci_resource_start(pdev, 2);
-	ggtt->mappable_end = pci_resource_len(pdev, 2);
+	ggtt->gmadr =
+		(struct resource) DEFINE_RES_MEM(pci_resource_start(pdev, 2),
+						 pci_resource_len(pdev, 2));
+	ggtt->mappable_end = resource_size(&ggtt->gmadr);
 
 	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(39));
 	if (!err)
@@ -3343,8 +3345,10 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt)
 	u16 snb_gmch_ctl;
 	int err;
 
-	ggtt->mappable_base = pci_resource_start(pdev, 2);
-	ggtt->mappable_end = pci_resource_len(pdev, 2);
+	ggtt->gmadr =
+		(struct resource) DEFINE_RES_MEM(pci_resource_start(pdev, 2),
+						 pci_resource_len(pdev, 2));
+	ggtt->mappable_end = resource_size(&ggtt->gmadr);
 
 	/* 64/512MB is the current min/max we actually know of, but this is just
 	 * a coarse sanity check.
@@ -3397,6 +3401,7 @@ static void i915_gmch_remove(struct i915_address_space *vm)
 static int i915_gmch_probe(struct i915_ggtt *ggtt)
 {
 	struct drm_i915_private *dev_priv = ggtt->base.i915;
+	phys_addr_t gmadr_base;
 	int ret;
 
 	ret = intel_gmch_probe(dev_priv->bridge_dev, dev_priv->drm.pdev, NULL);
@@ -3406,9 +3411,13 @@ static int i915_gmch_probe(struct i915_ggtt *ggtt)
 	}
 
 	intel_gtt_get(&ggtt->base.total,
-		      &ggtt->mappable_base,
+		      &gmadr_base,
 		      &ggtt->mappable_end);
 
+	ggtt->gmadr =
+		(struct resource) DEFINE_RES_MEM(gmadr_base,
+						 ggtt->mappable_end);
+
 	ggtt->do_idle_maps = needs_idle_maps(dev_priv);
 	ggtt->base.insert_page = i915_ggtt_insert_page;
 	ggtt->base.insert_entries = i915_ggtt_insert_entries;
@@ -3476,7 +3485,7 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
 	/* GMADR is the PCI mmio aperture into the global GTT. */
 	DRM_INFO("Memory usable by graphics device = %lluM\n",
 		 ggtt->base.total >> 20);
-	DRM_DEBUG_DRIVER("GMADR size = %lldM\n", ggtt->mappable_end >> 20);
+	DRM_DEBUG_DRIVER("GMADR size = %lluM\n", (u64)ggtt->mappable_end >> 20);
 	DRM_DEBUG_DRIVER("GTT stolen size = %lluM\n",
 			 (u64)resource_size(&intel_graphics_stolen_res) >> 20);
 	if (intel_vtd_active())
@@ -3507,14 +3516,14 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv)
 		ggtt->base.mm.color_adjust = i915_gtt_color_adjust;
 	mutex_unlock(&dev_priv->drm.struct_mutex);
 
-	if (!io_mapping_init_wc(&dev_priv->ggtt.mappable,
-				dev_priv->ggtt.mappable_base,
+	if (!io_mapping_init_wc(&dev_priv->ggtt.iomap,
+				dev_priv->ggtt.gmadr.start,
 				dev_priv->ggtt.mappable_end)) {
 		ret = -EIO;
 		goto out_gtt_cleanup;
 	}
 
-	ggtt->mtrr = arch_phys_wc_add(ggtt->mappable_base, ggtt->mappable_end);
+	ggtt->mtrr = arch_phys_wc_add(ggtt->gmadr.start, ggtt->mappable_end);
 
 	/*
 	 * Initialise stolen early so that we may reserve preallocated
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index db20c72ecfc8..4a17ce36281a 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -368,9 +368,9 @@ i915_vm_has_scratch_64K(struct i915_address_space *vm)
  */
 struct i915_ggtt {
 	struct i915_address_space base;
-	struct io_mapping mappable;	/* Mapping to our CPU mappable region */
 
-	phys_addr_t mappable_base;	/* PA of our GMADR */
+	struct io_mapping iomap;	/* Mapping to our CPU mappable region */
+	struct resource gmadr;          /* GMADR resource */
 	u64 mappable_end;		/* End offset that we can CPU map */
 
 	/* Stolen memory is segmented in hardware with different portions
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 48418fb81066..aba50aa613f1 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -956,7 +956,7 @@ i915_error_object_create(struct drm_i915_private *i915,
 		ggtt->base.insert_page(&ggtt->base, dma, slot,
 				       I915_CACHE_NONE, 0);
 
-		s = io_mapping_map_atomic_wc(&ggtt->mappable, slot);
+		s = io_mapping_map_atomic_wc(&ggtt->iomap, slot);
 		ret = compress_page(&compress, (void  __force *)s, dst);
 		io_mapping_unmap_atomic(s);
 
diff --git a/drivers/gpu/drm/i915/i915_vma.c b/drivers/gpu/drm/i915/i915_vma.c
index bf6d8d1eaabe..7419623ff144 100644
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -305,7 +305,7 @@ void __iomem *i915_vma_pin_iomap(struct i915_vma *vma)
 
 	ptr = vma->iomap;
 	if (ptr == NULL) {
-		ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->mappable,
+		ptr = io_mapping_map_wc(&i915_vm_to_ggtt(vma->vm)->iomap,
 					vma->node.start,
 					vma->node.size);
 		if (ptr == NULL) {
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 1f7e312d0d0d..0098738d3740 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -14621,7 +14621,7 @@ int intel_modeset_init(struct drm_device *dev)
 		dev->mode_config.cursor_height = MAX_CURSOR_HEIGHT;
 	}
 
-	dev->mode_config.fb_base = ggtt->mappable_base;
+	dev->mode_config.fb_base = ggtt->gmadr.start;
 
 	DRM_DEBUG_KMS("%d display pipe%s available.\n",
 		      INTEL_INFO(dev_priv)->num_pipes,
diff --git a/drivers/gpu/drm/i915/intel_overlay.c b/drivers/gpu/drm/i915/intel_overlay.c
index 1b397b41cb4f..41e9465d44a8 100644
--- a/drivers/gpu/drm/i915/intel_overlay.c
+++ b/drivers/gpu/drm/i915/intel_overlay.c
@@ -219,7 +219,7 @@ intel_overlay_map_regs(struct intel_overlay *overlay)
 	if (OVERLAY_NEEDS_PHYSICAL(dev_priv))
 		regs = (struct overlay_registers __iomem *)overlay->reg_bo->phys_handle->vaddr;
 	else
-		regs = io_mapping_map_wc(&dev_priv->ggtt.mappable,
+		regs = io_mapping_map_wc(&dev_priv->ggtt.iomap,
 					 overlay->flip_addr,
 					 PAGE_SIZE);
 
@@ -1508,7 +1508,7 @@ intel_overlay_map_regs_atomic(struct intel_overlay *overlay)
 		regs = (struct overlay_registers __iomem *)
 			overlay->reg_bo->phys_handle->vaddr;
 	else
-		regs = io_mapping_map_atomic_wc(&dev_priv->ggtt.mappable,
+		regs = io_mapping_map_atomic_wc(&dev_priv->ggtt.iomap,
 						overlay->flip_addr);
 
 	return regs;
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
index 6491cf0a4f46..4a28d713a7d8 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c
@@ -1074,7 +1074,7 @@ static int igt_ggtt_page(void *arg)
 				       i915_gem_object_get_dma_address(obj, 0),
 				       offset, I915_CACHE_NONE, 0);
 
-		vaddr = io_mapping_map_atomic_wc(&ggtt->mappable, offset);
+		vaddr = io_mapping_map_atomic_wc(&ggtt->iomap, offset);
 		iowrite32(n, vaddr + n);
 		io_mapping_unmap_atomic(vaddr);
 
@@ -1092,7 +1092,7 @@ static int igt_ggtt_page(void *arg)
 				       i915_gem_object_get_dma_address(obj, 0),
 				       offset, I915_CACHE_NONE, 0);
 
-		vaddr = io_mapping_map_atomic_wc(&ggtt->mappable, offset);
+		vaddr = io_mapping_map_atomic_wc(&ggtt->iomap, offset);
 		val = ioread32(vaddr + n);
 		io_mapping_unmap_atomic(vaddr);
 
diff --git a/drivers/gpu/drm/i915/selftests/mock_gtt.c b/drivers/gpu/drm/i915/selftests/mock_gtt.c
index 336e1afb250f..e96873f96116 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gtt.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gtt.c
@@ -110,8 +110,8 @@ void mock_init_ggtt(struct drm_i915_private *i915)
 
 	ggtt->base.i915 = i915;
 
-	ggtt->mappable_base = 0;
-	ggtt->mappable_end = 2048 * PAGE_SIZE;
+	ggtt->gmadr = (struct resource) DEFINE_RES_MEM(0, 2048 * PAGE_SIZE);
+	ggtt->mappable_end = resource_size(&ggtt->gmadr);
 	ggtt->base.total = 4096 * PAGE_SIZE;
 
 	ggtt->base.clear_range = nop_clear_range;
-- 
2.14.3

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[PATCH 08/10] drm/i915: give stolen_usable_size a more suitable home

[Matthew Auld]

Kick it out of i915_ggtt and keep it grouped with dsm and dsm_reserved,
where it makes the most sense.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.h        | 12 +++++++++++-
 drivers/gpu/drm/i915/i915_gem_gtt.h    | 10 ----------
 drivers/gpu/drm/i915/i915_gem_stolen.c |  5 ++---
 drivers/gpu/drm/i915/intel_display.c   |  3 +--
 drivers/gpu/drm/i915/intel_fbdev.c     |  3 +--
 5 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 40171a7da9d9..2c3e1d715c11 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2253,7 +2253,7 @@ struct drm_i915_private {
 	/**
 	 * Data Stolen Memory - aka "i915 stolen memory" gives us the start and
 	 * end of stolen which we can optionally use to create GEM objects
-	 * backed by stolen memory. Note that ggtt->stolen_usable_size tells us
+	 * backed by stolen memory. Note that stolen_usable_size tells us
 	 * exactly how much of this we are actually allowed to use, given that
 	 * some portion of it is in fact reserved for use by hardware functions.
 	 */
@@ -2263,6 +2263,16 @@ struct drm_i915_private {
 	 */
 	struct resource dsm_reserved;
 
+	/* Stolen memory is segmented in hardware with different portions
+	 * offlimits to certain functions.
+	 *
+	 * The drm_mm is initialised to the total accessible range, as found
+	 * from the PCI config. On Broadwell+, this is further restricted to
+	 * avoid the first page! The upper end of stolen memory is reserved for
+	 * hardware functions and similarly removed from the accessible range.
+	 */
+	u32 stolen_usable_size;	/* Total size minus reserved ranges */
+
 	void __iomem *regs;
 
 	struct intel_uncore uncore;
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 4a17ce36281a..e5aa07ceb627 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -373,16 +373,6 @@ struct i915_ggtt {
 	struct resource gmadr;          /* GMADR resource */
 	u64 mappable_end;		/* End offset that we can CPU map */
 
-	/* Stolen memory is segmented in hardware with different portions
-	 * offlimits to certain functions.
-	 *
-	 * The drm_mm is initialised to the total accessible range, as found
-	 * from the PCI config. On Broadwell+, this is further restricted to
-	 * avoid the first page! The upper end of stolen memory is reserved for
-	 * hardware functions and similarly removed from the accessible range.
-	 */
-	u32 stolen_usable_size;	/* Total size minus reserved ranges */
-
 	/** "Graphics Stolen Memory" holds the global PTEs */
 	void __iomem *gsm;
 	void (*invalidate)(struct drm_i915_private *dev_priv);
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 18d8e4556b11..c3a09d665047 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -322,7 +322,6 @@ static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
 
 int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 {
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	dma_addr_t reserved_base, stolen_top;
 	u32 reserved_total, reserved_size;
 	u32 stolen_usable_start;
@@ -413,12 +412,12 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 	if (INTEL_GEN(dev_priv) >= 8)
 		stolen_usable_start = 4096;
 
-	ggtt->stolen_usable_size =
+	dev_priv->stolen_usable_size =
 		resource_size(&dev_priv->dsm) - reserved_total - stolen_usable_start;
 
 	/* Basic memrange allocator for stolen space. */
 	drm_mm_init(&dev_priv->mm.stolen, stolen_usable_start,
-		    ggtt->stolen_usable_size);
+		    dev_priv->stolen_usable_size);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0098738d3740..f1e0e838b2a7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2639,7 +2639,6 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
 {
 	struct drm_device *dev = crtc->base.dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	struct drm_i915_gem_object *obj = NULL;
 	struct drm_mode_fb_cmd2 mode_cmd = { 0 };
 	struct drm_framebuffer *fb = &plane_config->fb->base;
@@ -2655,7 +2654,7 @@ intel_alloc_initial_plane_obj(struct intel_crtc *crtc,
 	/* If the FB is too big, just don't use it since fbdev is not very
 	 * important and we should probably use that space with FBC or other
 	 * features. */
-	if (size_aligned * 2 > ggtt->stolen_usable_size)
+	if (size_aligned * 2 > dev_priv->stolen_usable_size)
 		return false;
 
 	mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index ea96682568e8..da48af11eb6b 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -115,7 +115,6 @@ static int intelfb_alloc(struct drm_fb_helper *helper,
 	struct drm_framebuffer *fb;
 	struct drm_device *dev = helper->dev;
 	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	struct drm_mode_fb_cmd2 mode_cmd = {};
 	struct drm_i915_gem_object *obj;
 	int size, ret;
@@ -139,7 +138,7 @@ static int intelfb_alloc(struct drm_fb_helper *helper,
 	 * important and we should probably use that space with FBC or other
 	 * features. */
 	obj = NULL;
-	if (size * 2 < ggtt->stolen_usable_size)
+	if (size * 2 < dev_priv->stolen_usable_size)
 		obj = i915_gem_object_create_stolen(dev_priv, size);
 	if (obj == NULL)
 		obj = i915_gem_object_create(dev_priv, size);
-- 
2.14.3

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Re: [PATCH 08/10] drm/i915: give stolen_usable_size a more suitable home

[Chris Wilson]

Quoting Matthew Auld (2017-12-06 18:17:28)
> Kick it out of i915_ggtt and keep it grouped with dsm and dsm_reserved,
> where it makes the most sense.
> 
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h        | 12 +++++++++++-
>  drivers/gpu/drm/i915/i915_gem_gtt.h    | 10 ----------
>  drivers/gpu/drm/i915/i915_gem_stolen.c |  5 ++---
>  drivers/gpu/drm/i915/intel_display.c   |  3 +--
>  drivers/gpu/drm/i915/intel_fbdev.c     |  3 +--
>  5 files changed, 15 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 40171a7da9d9..2c3e1d715c11 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2253,7 +2253,7 @@ struct drm_i915_private {
>         /**
>          * Data Stolen Memory - aka "i915 stolen memory" gives us the start and
>          * end of stolen which we can optionally use to create GEM objects
> -        * backed by stolen memory. Note that ggtt->stolen_usable_size tells us
> +        * backed by stolen memory. Note that stolen_usable_size tells us
>          * exactly how much of this we are actually allowed to use, given that
>          * some portion of it is in fact reserved for use by hardware functions.
>          */
> @@ -2263,6 +2263,16 @@ struct drm_i915_private {
>          */
>         struct resource dsm_reserved;
>  
> +       /* Stolen memory is segmented in hardware with different portions

/*
 * Stolen...
 */

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
-Chris
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[PATCH 09/10] drm/i915: prefer resource_size_t for everything stolen

[Matthew Auld]

Keeps things consistent now that we make use of struct resource. This
should keep us covered in case we ever get huge amounts of stolen
memory.

v2: bunch of missing conversions (Chris)

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/char/agp/intel-gtt.c           | 12 +++++-----
 drivers/gpu/drm/i915/i915_debugfs.c    |  4 ++--
 drivers/gpu/drm/i915/i915_drv.h        | 11 +++++-----
 drivers/gpu/drm/i915/i915_gem_gtt.c    | 10 ++++-----
 drivers/gpu/drm/i915/i915_gem_gtt.h    |  2 +-
 drivers/gpu/drm/i915/i915_gem_stolen.c | 40 +++++++++++++++++-----------------
 drivers/gpu/drm/i915/intel_pm.c        | 10 ++++-----
 include/drm/intel-gtt.h                |  2 +-
 8 files changed, 46 insertions(+), 45 deletions(-)

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 050708e4562e..b1c0859ed68b 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -80,7 +80,7 @@ static struct _intel_private {
 	unsigned int needs_dmar : 1;
 	phys_addr_t gma_bus_addr;
 	/*  Size of memory reserved for graphics by the BIOS */
-	unsigned int stolen_size;
+	resource_size_t stolen_size;
 	/* Total number of gtt entries. */
 	unsigned int gtt_total_entries;
 	/* Part of the gtt that is mappable by the cpu, for those chips where
@@ -333,13 +333,13 @@ static void i810_write_entry(dma_addr_t addr, unsigned int entry,
 	writel_relaxed(addr | pte_flags, intel_private.gtt + entry);
 }
 
-static unsigned int intel_gtt_stolen_size(void)
+static resource_size_t intel_gtt_stolen_size(void)
 {
 	u16 gmch_ctrl;
 	u8 rdct;
 	int local = 0;
 	static const int ddt[4] = { 0, 16, 32, 64 };
-	unsigned int stolen_size = 0;
+	resource_size_t stolen_size = 0;
 
 	if (INTEL_GTT_GEN == 1)
 		return 0; /* no stolen mem on i81x */
@@ -417,8 +417,8 @@ static unsigned int intel_gtt_stolen_size(void)
 	}
 
 	if (stolen_size > 0) {
-		dev_info(&intel_private.bridge_dev->dev, "detected %dK %s memory\n",
-		       stolen_size / KB(1), local ? "local" : "stolen");
+		dev_info(&intel_private.bridge_dev->dev, "detected %lluK %s memory\n",
+		       (u64)stolen_size / KB(1), local ? "local" : "stolen");
 	} else {
 		dev_info(&intel_private.bridge_dev->dev,
 		       "no pre-allocated video memory detected\n");
@@ -1423,7 +1423,7 @@ EXPORT_SYMBOL(intel_gmch_probe);
 
 void intel_gtt_get(u64 *gtt_total,
 		   phys_addr_t *mappable_base,
-		   u64 *mappable_end)
+		   resource_size_t *mappable_end)
 {
 	*gtt_total = intel_private.gtt_total_entries << PAGE_SHIFT;
 	*mappable_base = intel_private.gma_bus_addr;
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 28294470ae31..fad4116f61c5 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -522,8 +522,8 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
 	seq_printf(m, "%u display objects (globally pinned), %llu bytes\n",
 		   dpy_count, dpy_size);
 
-	seq_printf(m, "%llu [%llu] gtt total\n",
-		   ggtt->base.total, ggtt->mappable_end);
+	seq_printf(m, "%llu [%pa] gtt total\n",
+		   ggtt->base.total, &ggtt->mappable_end);
 	seq_printf(m, "Supported page sizes: %s\n",
 		   stringify_page_sizes(INTEL_INFO(dev_priv)->page_sizes,
 					buf, sizeof(buf)));
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 2c3e1d715c11..66bde0210b80 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2271,7 +2271,7 @@ struct drm_i915_private {
 	 * avoid the first page! The upper end of stolen memory is reserved for
 	 * hardware functions and similarly removed from the accessible range.
 	 */
-	u32 stolen_usable_size;	/* Total size minus reserved ranges */
+	resource_size_t stolen_usable_size;	/* Total size minus reserved ranges */
 
 	void __iomem *regs;
 
@@ -3928,12 +3928,13 @@ void i915_gem_stolen_remove_node(struct drm_i915_private *dev_priv,
 int i915_gem_init_stolen(struct drm_i915_private *dev_priv);
 void i915_gem_cleanup_stolen(struct drm_device *dev);
 struct drm_i915_gem_object *
-i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, u32 size);
+i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
+			      resource_size_t size);
 struct drm_i915_gem_object *
 i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv,
-					       u32 stolen_offset,
-					       u32 gtt_offset,
-					       u32 size);
+					       resource_size_t stolen_offset,
+					       resource_size_t gtt_offset,
+					       resource_size_t size);
 
 /* i915_gem_internal.c */
 struct drm_i915_gem_object *
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 09c425e35b56..5a7bc7917d9b 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3354,7 +3354,7 @@ static int gen6_gmch_probe(struct i915_ggtt *ggtt)
 	 * a coarse sanity check.
 	 */
 	if (ggtt->mappable_end < (64<<20) || ggtt->mappable_end > (512<<20)) {
-		DRM_ERROR("Unknown GMADR size (%llx)\n", ggtt->mappable_end);
+		DRM_ERROR("Unknown GMADR size (%pa)\n", &ggtt->mappable_end);
 		return -ENXIO;
 	}
 
@@ -3464,7 +3464,7 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
 	 */
 	if (USES_GUC(dev_priv)) {
 		ggtt->base.total = min_t(u64, ggtt->base.total, GUC_GGTT_TOP);
-		ggtt->mappable_end = min(ggtt->mappable_end, ggtt->base.total);
+		ggtt->mappable_end = min_t(u64, ggtt->mappable_end, ggtt->base.total);
 	}
 
 	if ((ggtt->base.total - 1) >> 32) {
@@ -3472,13 +3472,13 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
 			  " of address space! Found %lldM!\n",
 			  ggtt->base.total >> 20);
 		ggtt->base.total = 1ULL << 32;
-		ggtt->mappable_end = min(ggtt->mappable_end, ggtt->base.total);
+		ggtt->mappable_end = min_t(u64, ggtt->mappable_end, ggtt->base.total);
 	}
 
 	if (ggtt->mappable_end > ggtt->base.total) {
 		DRM_ERROR("mappable aperture extends past end of GGTT,"
-			  " aperture=%llx, total=%llx\n",
-			  ggtt->mappable_end, ggtt->base.total);
+			  " aperture=%pa, total=%llx\n",
+			  &ggtt->mappable_end, ggtt->base.total);
 		ggtt->mappable_end = ggtt->base.total;
 	}
 
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index e5aa07ceb627..a42890d9af38 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -371,7 +371,7 @@ struct i915_ggtt {
 
 	struct io_mapping iomap;	/* Mapping to our CPU mappable region */
 	struct resource gmadr;          /* GMADR resource */
-	u64 mappable_end;		/* End offset that we can CPU map */
+	resource_size_t mappable_end;	/* End offset that we can CPU map */
 
 	/** "Graphics Stolen Memory" holds the global PTEs */
 	void __iomem *gsm;
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index c3a09d665047..2267af68c3e1 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -93,7 +93,7 @@ static int i915_adjust_stolen(struct drm_i915_private *dev_priv,
 			DEFINE_RES_MEM(dsm->start, resource_size(dsm)),
 		};
 		struct resource ggtt_res;
-		u64 ggtt_start;
+		resource_size_t ggtt_start;
 
 		ggtt_start = I915_READ(PGTBL_CTL);
 		if (IS_GEN4(dev_priv))
@@ -171,12 +171,12 @@ void i915_gem_cleanup_stolen(struct drm_device *dev)
 }
 
 static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
-				    dma_addr_t *base, u32 *size)
+				    resource_size_t *base, resource_size_t *size)
 {
 	uint32_t reg_val = I915_READ(IS_GM45(dev_priv) ?
 				     CTG_STOLEN_RESERVED :
 				     ELK_STOLEN_RESERVED);
-	dma_addr_t stolen_top = dev_priv->dsm.end + 1;
+	resource_size_t stolen_top = dev_priv->dsm.end + 1;
 
 	if ((reg_val & G4X_STOLEN_RESERVED_ENABLE) == 0) {
 		*base = 0;
@@ -205,7 +205,7 @@ static void g4x_get_stolen_reserved(struct drm_i915_private *dev_priv,
 }
 
 static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,
-				     dma_addr_t *base, u32 *size)
+				     resource_size_t *base, resource_size_t *size)
 {
 	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
 
@@ -237,7 +237,7 @@ static void gen6_get_stolen_reserved(struct drm_i915_private *dev_priv,
 }
 
 static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
-				     dma_addr_t *base, u32 *size)
+				     resource_size_t *base, resource_size_t *size)
 {
 	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
 
@@ -263,7 +263,7 @@ static void gen7_get_stolen_reserved(struct drm_i915_private *dev_priv,
 }
 
 static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv,
-				    dma_addr_t *base, u32 *size)
+				    resource_size_t *base, resource_size_t *size)
 {
 	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
 
@@ -295,10 +295,10 @@ static void chv_get_stolen_reserved(struct drm_i915_private *dev_priv,
 }
 
 static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
-				    dma_addr_t *base, u32 *size)
+				    resource_size_t *base, resource_size_t *size)
 {
 	uint32_t reg_val = I915_READ(GEN6_STOLEN_RESERVED);
-	dma_addr_t stolen_top;
+	resource_size_t stolen_top;
 
 	if ((reg_val & GEN6_STOLEN_RESERVED_ENABLE) == 0) {
 		*base = 0;
@@ -322,9 +322,9 @@ static void bdw_get_stolen_reserved(struct drm_i915_private *dev_priv,
 
 int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 {
-	dma_addr_t reserved_base, stolen_top;
-	u32 reserved_total, reserved_size;
-	u32 stolen_usable_start;
+	resource_size_t reserved_base, stolen_top;
+	resource_size_t reserved_total, reserved_size;
+	resource_size_t stolen_usable_start;
 
 	mutex_init(&dev_priv->mm.stolen_lock);
 
@@ -424,14 +424,13 @@ int i915_gem_init_stolen(struct drm_i915_private *dev_priv)
 
 static struct sg_table *
 i915_pages_create_for_stolen(struct drm_device *dev,
-			     u32 offset, u32 size)
+			     resource_size_t offset, resource_size_t size)
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct sg_table *st;
 	struct scatterlist *sg;
 
-	GEM_BUG_ON(range_overflows_t(resource_size_t, offset, size,
-				     resource_size(&dev_priv->dsm)));
+	GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm)));
 
 	/* We hide that we have no struct page backing our stolen object
 	 * by wrapping the contiguous physical allocation with a fake
@@ -529,7 +528,8 @@ _i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
 }
 
 struct drm_i915_gem_object *
-i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, u32 size)
+i915_gem_object_create_stolen(struct drm_i915_private *dev_priv,
+			      resource_size_t size)
 {
 	struct drm_i915_gem_object *obj;
 	struct drm_mm_node *stolen;
@@ -562,9 +562,9 @@ i915_gem_object_create_stolen(struct drm_i915_private *dev_priv, u32 size)
 
 struct drm_i915_gem_object *
 i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv,
-					       u32 stolen_offset,
-					       u32 gtt_offset,
-					       u32 size)
+					       resource_size_t stolen_offset,
+					       resource_size_t gtt_offset,
+					       resource_size_t size)
 {
 	struct i915_ggtt *ggtt = &dev_priv->ggtt;
 	struct drm_i915_gem_object *obj;
@@ -577,8 +577,8 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_i915_private *dev_priv
 
 	lockdep_assert_held(&dev_priv->drm.struct_mutex);
 
-	DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%x, gtt_offset=%x, size=%x\n",
-			stolen_offset, gtt_offset, size);
+	DRM_DEBUG_KMS("creating preallocated stolen object: stolen_offset=%pa, gtt_offset=%pa, size=%pa\n",
+			&stolen_offset, &gtt_offset, &size);
 
 	/* KISS and expect everything to be page-aligned */
 	if (WARN_ON(size == 0) ||
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 57dcf8e1ff30..18779c6eb4bf 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -7033,9 +7033,9 @@ static void cherryview_check_pctx(struct drm_i915_private *dev_priv)
 
 static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
 {
-	unsigned long pctx_paddr, paddr;
+	resource_size_t pctx_paddr, paddr;
+	resource_size_t pctx_size = 32*1024;
 	u32 pcbr;
-	int pctx_size = 32*1024;
 
 	pcbr = I915_READ(VLV_PCBR);
 	if ((pcbr >> VLV_PCBR_ADDR_SHIFT) == 0) {
@@ -7053,14 +7053,14 @@ static void cherryview_setup_pctx(struct drm_i915_private *dev_priv)
 static void valleyview_setup_pctx(struct drm_i915_private *dev_priv)
 {
 	struct drm_i915_gem_object *pctx;
-	unsigned long pctx_paddr;
+	resource_size_t pctx_paddr;
+	resource_size_t pctx_size = 24*1024;
 	u32 pcbr;
-	int pctx_size = 24*1024;
 
 	pcbr = I915_READ(VLV_PCBR);
 	if (pcbr) {
 		/* BIOS set it up already, grab the pre-alloc'd space */
-		int pcbr_offset;
+		resource_size_t pcbr_offset;
 
 		pcbr_offset = (pcbr & (~4095)) - dev_priv->dsm.start;
 		pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv,
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 8c577ca38e2e..2324c84a25c0 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -6,7 +6,7 @@
 
 void intel_gtt_get(u64 *gtt_total,
 		   phys_addr_t *mappable_base,
-		   u64 *mappable_end);
+		   resource_size_t *mappable_end);
 
 int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev,
 		     struct agp_bridge_data *bridge);
-- 
2.14.3

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Re: [PATCH 09/10] drm/i915: prefer resource_size_t for everything stolen

[Chris Wilson]

Quoting Matthew Auld (2017-12-06 18:17:29)
> Keeps things consistent now that we make use of struct resource. This
> should keep us covered in case we ever get huge amounts of stolen
> memory.
> 
> v2: bunch of missing conversions (Chris)
> 
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
> @@ -3464,7 +3464,7 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
>          */
>         if (USES_GUC(dev_priv)) {
>                 ggtt->base.total = min_t(u64, ggtt->base.total, GUC_GGTT_TOP);
> -               ggtt->mappable_end = min(ggtt->mappable_end, ggtt->base.total);
> +               ggtt->mappable_end = min_t(u64, ggtt->mappable_end, ggtt->base.total);
>         }
>  
>         if ((ggtt->base.total - 1) >> 32) {
> @@ -3472,13 +3472,13 @@ int i915_ggtt_probe_hw(struct drm_i915_private *dev_priv)
>                           " of address space! Found %lldM!\n",
>                           ggtt->base.total >> 20);
>                 ggtt->base.total = 1ULL << 32;
> -               ggtt->mappable_end = min(ggtt->mappable_end, ggtt->base.total);
> +               ggtt->mappable_end = min_t(u64, ggtt->mappable_end, ggtt->base.total);
>         }

Hmm. Not pretty, but I have no better alternative (other than plain old
if()).

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
-Chris
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[PATCH 10/10] drm/i915: prefer stolen_usable_size for the range sanity check

[Matthew Auld]

In i915_pages_create_for_stolen it probably makes more sense to check if
the range overflows the stolen_usable_size, since the size of dsm will also
include the reserved portion which we can't touch.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 2267af68c3e1..f8c9f0446712 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -430,7 +430,7 @@ i915_pages_create_for_stolen(struct drm_device *dev,
 	struct sg_table *st;
 	struct scatterlist *sg;
 
-	GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm)));
+	GEM_BUG_ON(range_overflows(offset, size, dev_priv->stolen_usable_size));
 
 	/* We hide that we have no struct page backing our stolen object
 	 * by wrapping the contiguous physical allocation with a fake
-- 
2.14.3

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Re: [PATCH 10/10] drm/i915: prefer stolen_usable_size for the range sanity check

[Chris Wilson]

Quoting Matthew Auld (2017-12-06 18:17:30)
> In i915_pages_create_for_stolen it probably makes more sense to check if
> the range overflows the stolen_usable_size, since the size of dsm will also
> include the reserved portion which we can't touch.
> 
> Signed-off-by: Matthew Auld <matthew.auld@intel.com>
> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
> Cc: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
> ---
>  drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
> index 2267af68c3e1..f8c9f0446712 100644
> --- a/drivers/gpu/drm/i915/i915_gem_stolen.c
> +++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
> @@ -430,7 +430,7 @@ i915_pages_create_for_stolen(struct drm_device *dev,
>         struct sg_table *st;
>         struct scatterlist *sg;
>  
> -       GEM_BUG_ON(range_overflows(offset, size, resource_size(&dev_priv->dsm)));
> +       GEM_BUG_ON(range_overflows(offset, size, dev_priv->stolen_usable_size));

I'm not sold. The usable size is a restriction placed on the drm_mm
range manager that not everyone may be privy to; certainly when coming
from HW that knows only about the stolen region.
-Chris
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✓ Fi.CI.BAT: success for make stolen resource centric (rev5)

[Patchwork]

== Series Details ==

Series: make stolen resource centric (rev5)
URL   : https://patchwork.freedesktop.org/series/34256/
State : success

== Summary ==

Series 34256v5 make stolen resource centric
https://patchwork.freedesktop.org/api/1.0/series/34256/revisions/5/mbox/

Test gem_mmap_gtt:
        Subgroup basic-small-bo-tiledx:
                pass       -> FAIL       (fi-gdg-551) fdo#102575

fdo#102575 https://bugs.freedesktop.org/show_bug.cgi?id=102575

fi-bdw-5557u     total:288  pass:267  dwarn:0   dfail:0   fail:0   skip:21  time:445s
fi-blb-e6850     total:288  pass:223  dwarn:1   dfail:0   fail:0   skip:64  time:385s
fi-bsw-n3050     total:288  pass:242  dwarn:0   dfail:0   fail:0   skip:46  time:515s
fi-bwr-2160      total:288  pass:183  dwarn:0   dfail:0   fail:0   skip:105 time:282s
fi-bxt-dsi       total:288  pass:258  dwarn:0   dfail:0   fail:0   skip:30  time:500s
fi-bxt-j4205     total:288  pass:259  dwarn:0   dfail:0   fail:0   skip:29  time:508s
fi-byt-j1900     total:288  pass:253  dwarn:0   dfail:0   fail:0   skip:35  time:489s
fi-byt-n2820     total:288  pass:249  dwarn:0   dfail:0   fail:0   skip:39  time:471s
fi-elk-e7500     total:224  pass:163  dwarn:15  dfail:0   fail:0   skip:45 
fi-gdg-551       total:288  pass:178  dwarn:1   dfail:0   fail:1   skip:108 time:270s
fi-glk-1         total:288  pass:260  dwarn:0   dfail:0   fail:0   skip:28  time:538s
fi-hsw-4770      total:288  pass:261  dwarn:0   dfail:0   fail:0   skip:27  time:373s
fi-hsw-4770r     total:288  pass:224  dwarn:0   dfail:0   fail:0   skip:64  time:257s
fi-ivb-3520m     total:288  pass:259  dwarn:0   dfail:0   fail:0   skip:29  time:474s
fi-ivb-3770      total:288  pass:259  dwarn:0   dfail:0   fail:0   skip:29  time:446s
fi-kbl-7560u     total:288  pass:269  dwarn:0   dfail:0   fail:0   skip:19  time:531s
fi-kbl-7567u     total:288  pass:268  dwarn:0   dfail:0   fail:0   skip:20  time:477s
fi-kbl-r         total:288  pass:261  dwarn:0   dfail:0   fail:0   skip:27  time:535s
fi-pnv-d510      total:288  pass:222  dwarn:1   dfail:0   fail:0   skip:65  time:597s
fi-skl-6260u     total:288  pass:268  dwarn:0   dfail:0   fail:0   skip:20  time:453s
fi-skl-6600u     total:288  pass:261  dwarn:0   dfail:0   fail:0   skip:27  time:546s
fi-skl-6700hq    total:288  pass:262  dwarn:0   dfail:0   fail:0   skip:26  time:568s
fi-skl-6700k     total:288  pass:264  dwarn:0   dfail:0   fail:0   skip:24  time:518s
fi-skl-6770hq    total:288  pass:268  dwarn:0   dfail:0   fail:0   skip:20  time:497s
fi-snb-2520m     total:288  pass:249  dwarn:0   dfail:0   fail:0   skip:39  time:547s
fi-snb-2600      total:288  pass:248  dwarn:0   dfail:0   fail:0   skip:40  time:413s
Blacklisted hosts:
fi-cfl-s2        total:288  pass:262  dwarn:0   dfail:0   fail:0   skip:26  time:614s
fi-cnl-y         total:288  pass:262  dwarn:0   dfail:0   fail:0   skip:26  time:615s
fi-glk-dsi       total:196  pass:182  dwarn:0   dfail:0   fail:0   skip:13 

66be57731a40b46c8588811fbf4ca4d817122c20 drm-tip: 2017y-12m-06d-16h-12m-57s UTC integration manifest
9bb33f1c99b6 drm/i915: prefer stolen_usable_size for the range sanity check
0afe9f77b0b0 drm/i915: prefer resource_size_t for everything stolen
6a28f842f3b0 drm/i915: give stolen_usable_size a more suitable home
7d77e9211779 drm/i915: make mappable struct resource centric
8b10a2867a4e drm/i915: make reserved struct resource centric
6dd6ac3525eb drm/i915: make dsm struct resource centric
87069582c4f4 drm/i915: nuke the duplicated stolen discovery
78fce6ff81d4 x86/early-quirks: reverse the if ladders
ba05ce7b8e5b x86/early-quirks: replace the magical increment start values
289f2f0e9ae0 x86/early-quirks: Extend Intel graphics stolen memory placement to 64bit

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_7430/
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✓ Fi.CI.IGT: success for make stolen resource centric (rev5)

[Patchwork]

== Series Details ==

Series: make stolen resource centric (rev5)
URL   : https://patchwork.freedesktop.org/series/34256/
State : success

== Summary ==

Warning: bzip CI_DRM_3466/shard-snb2/results25.json.bz2 wasn't in correct JSON format
Test perf:
        Subgroup oa-exponents:
                pass       -> FAIL       (shard-hsw) fdo#102254
Test kms_pipe_crc_basic:
        Subgroup read-crc-pipe-b-frame-sequence:
                pass       -> INCOMPLETE (shard-hsw) fdo#102332
Test kms_setmode:
        Subgroup basic:
                fail       -> PASS       (shard-hsw) fdo#99912
Test kms_frontbuffer_tracking:
        Subgroup fbc-1p-offscren-pri-shrfb-draw-blt:
                pass       -> FAIL       (shard-snb) fdo#101623
Test drv_selftest:
        Subgroup live_hangcheck:
                pass       -> INCOMPLETE (shard-snb) fdo#103880

fdo#102254 https://bugs.freedesktop.org/show_bug.cgi?id=102254
fdo#102332 https://bugs.freedesktop.org/show_bug.cgi?id=102332
fdo#99912 https://bugs.freedesktop.org/show_bug.cgi?id=99912
fdo#101623 https://bugs.freedesktop.org/show_bug.cgi?id=101623
fdo#103880 https://bugs.freedesktop.org/show_bug.cgi?id=103880

shard-hsw        total:2623 pass:1505 dwarn:1   dfail:0   fail:10  skip:1106 time:9243s
shard-snb        total:2661 pass:1289 dwarn:1   dfail:0   fail:12  skip:1358 time:7965s
Blacklisted hosts:
shard-kbl        total:2614 pass:1747 dwarn:6   dfail:0   fail:24  skip:835 time:10178s

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_7430/shards.html
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