From: Paulo Zanoni <paulo.r.zanoni@intel.com>
Date: Fri, 4 May 2018 13:32:51 -0700
Subject: x86/gpu: reserve ICL's graphics stolen memory
Git-commit: db0c8d8b031d2b5960f6407f7f2ca20e97e00605
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
ICL changes the registers and addresses to 64 bits.
I also briefly looked at implementing an u64 version of the PCI config
read functions, but I concluded this wouldn't be trivial, so it's not
worth doing it for a single user that can't have any racing problems
while reading the register in two separate operations.
v2:
- Scrub the development (non-public) changelog (Joonas).
- Remove the i915.ko bits so this can be easily backported in order
to properly avoid stolen memory even on machines without i915.ko
(Joonas).
- CC stable for the reasons above.
Issue: VIZ-9250
CC: stable@vger.kernel.org
Cc: Ingo Molnar <mingo@kernel.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Fixes: 412310019a20 ("drm/i915/icl: Add initial Icelake definitions.")
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180504203252.28048-1-paulo.r.zanoni@intel.com
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
arch/x86/kernel/early-quirks.c | 18 ++++++++++++++++++
include/drm/i915_drm.h | 4 +++-
2 files changed, 21 insertions(+), 1 deletion(-)
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -339,6 +339,18 @@ static phys_addr_t __init gen3_stolen_ba
return (phys_addr_t)bsm & INTEL_BSM_MASK;
}
+static phys_addr_t __init gen11_stolen_base(int num, int slot, int func,
+ size_t stolen_size)
+{
+ u64 bsm;
+
+ bsm = read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW0);
+ bsm &= INTEL_BSM_MASK;
+ bsm |= (u64)read_pci_config(num, slot, func, INTEL_GEN11_BSM_DW1) << 32;
+
+ return bsm;
+}
+
static size_t __init i830_stolen_size(int num, int slot, int func)
{
u16 gmch_ctrl;
@@ -498,6 +510,11 @@ static const struct intel_early_ops chv_
.stolen_size = chv_stolen_size,
};
+static const struct intel_early_ops gen11_early_ops __initconst = {
+ .stolen_base = gen11_stolen_base,
+ .stolen_size = gen9_stolen_size,
+};
+
static const struct pci_device_id intel_early_ids[] __initconst = {
INTEL_I830_IDS(&i830_early_ops),
INTEL_I845G_IDS(&i845_early_ops),
@@ -529,6 +546,7 @@ static const struct pci_device_id intel_
INTEL_CFL_IDS(&gen9_early_ops),
INTEL_GLK_IDS(&gen9_early_ops),
INTEL_CNL_IDS(&gen9_early_ops),
+ INTEL_ICL_11_IDS(&gen11_early_ops),
};
struct resource intel_graphics_stolen_res __ro_after_init = DEFINE_RES_MEM(0, 0);
--- a/include/drm/i915_drm.h
+++ b/include/drm/i915_drm.h
@@ -95,7 +95,9 @@ extern struct resource intel_graphics_st
#define I845_TSEG_SIZE_512K (2 << 1)
#define I845_TSEG_SIZE_1M (3 << 1)
-#define INTEL_BSM 0x5c
+#define INTEL_BSM 0x5c
+#define INTEL_GEN11_BSM_DW0 0xc0
+#define INTEL_GEN11_BSM_DW1 0xc4
#define INTEL_BSM_MASK (-(1u << 20))
#endif /* _I915_DRM_H_ */