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From: Matthew Auld <matthew.auld@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Caz Yokoyama <Caz.Yokoyama@intel.com>, dri-devel@lists.freedesktop.org
Subject: [PATCH 09/19] drm/i915/lmem: Fail driver init if LMEM training failed
Date: Mon, 12 Apr 2021 10:05:16 +0100	[thread overview]
Message-ID: <20210412090526.30547-10-matthew.auld@intel.com> (raw)
In-Reply-To: <20210412090526.30547-1-matthew.auld@intel.com>

From: Matt Roper <matthew.d.roper@intel.com>

Boot firmware performs memory training and health assessment during
startup.  If the memory training fails, the firmware will consider the
GPU unusable and will instruct the punit to keep the GT powered down.
If this happens, our driver will be unable to communicate with the GT
(all GT registers will read back as 0, forcewake requests will timeout,
etc.) so we should abort driver initialization if this happens.  We can
confirm that LMEM was initialized successfully via sgunit register
GU_CNTL.

Bspec: 53111
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Cc: Caz Yokoyama <Caz.Yokoyama@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h     |  3 +++
 drivers/gpu/drm/i915/intel_uncore.c | 12 ++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 4108f2a7ebfa..da73dc939e58 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -487,6 +487,9 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
 #define GAB_CTL				_MMIO(0x24000)
 #define   GAB_CTL_CONT_AFTER_PAGEFAULT	(1 << 8)
 
+#define GU_CNTL				_MMIO(0x101010)
+#define   LMEM_INIT			REG_BIT(7)
+
 #define GEN6_STOLEN_RESERVED		_MMIO(0x1082C0)
 #define GEN6_STOLEN_RESERVED_ADDR_MASK	(0xFFF << 20)
 #define GEN7_STOLEN_RESERVED_ADDR_MASK	(0x3FFF << 18)
diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c
index 661b50191f2b..4d0605757428 100644
--- a/drivers/gpu/drm/i915/intel_uncore.c
+++ b/drivers/gpu/drm/i915/intel_uncore.c
@@ -1917,6 +1917,18 @@ int intel_uncore_init_mmio(struct intel_uncore *uncore)
 	if (ret)
 		return ret;
 
+	/*
+	 * The boot firmware initializes local memory and assesses its health.
+	 * If memory training fails, the punit will have been instructed to
+	 * keep the GT powered down; we won't be able to communicate with it
+	 * and we should not continue with driver initialization.
+	 */
+	if (IS_DGFX(i915) &&
+	    !(__raw_uncore_read32(uncore, GU_CNTL) & LMEM_INIT)) {
+		drm_err(&i915->drm, "LMEM not initialized by firmware\n");
+		return -ENODEV;
+	}
+
 	if (INTEL_GEN(i915) > 5 && !intel_vgpu_active(i915))
 		uncore->flags |= UNCORE_HAS_FORCEWAKE;
 
-- 
2.26.3

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  parent reply	other threads:[~2021-04-12  9:09 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12  9:05 [PATCH 00/19] More DG1 enabling Matthew Auld
2021-04-12  9:05 ` [PATCH 01/19] drm/i915/gt: Skip aperture remapping selftest where there is no aperture Matthew Auld
2021-04-12 14:48   ` [Intel-gfx] " Daniel Vetter
2021-04-12  9:05 ` [PATCH 02/19] drm/i915/selftests: Only query RAPL for integrated power measurements Matthew Auld
2021-04-12  9:05 ` [PATCH 03/19] drm/i915: Create stolen memory region from local memory Matthew Auld
2021-04-14 15:01   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-16 15:04     ` Matthew Auld
2021-04-19 14:15       ` Tvrtko Ursulin
2021-04-12  9:05 ` [PATCH 04/19] drm/i915/stolen: treat stolen local as normal " Matthew Auld
2021-04-14 15:06   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-12  9:05 ` [PATCH 05/19] drm/i915/stolen: enforce the min_page_size contract Matthew Auld
2021-04-14 15:07   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-12  9:05 ` [PATCH 06/19] drm/i915/stolen: pass the allocation flags Matthew Auld
2021-04-14 15:09   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-16 13:53     ` Matthew Auld
2021-04-12  9:05 ` [PATCH 07/19] drm/i915/fbdev: Use lmem physical addresses for fb_mmap() on discrete Matthew Auld
2021-04-12 15:00   ` Daniel Vetter
2021-04-12  9:05 ` [PATCH 08/19] drm/i915: Return error value when bo not in LMEM for discrete Matthew Auld
2021-04-14 15:16   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-12  9:05 ` Matthew Auld [this message]
2021-04-12  9:05 ` [PATCH 10/19] drm/i915/dg1: Fix mapping type for default state object Matthew Auld
2021-04-12  9:05 ` [PATCH 11/19] drm/i915: Update the helper to set correct mapping Matthew Auld
2021-04-14 15:22   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-14 16:20     ` Matthew Auld
2021-04-15  8:20       ` Tvrtko Ursulin
2021-04-15  9:23         ` Matthew Auld
2021-04-15 11:05           ` Tvrtko Ursulin
2021-04-19 11:30             ` Matthew Auld
2021-04-19 14:07               ` Tvrtko Ursulin
2021-04-19 14:37                 ` Matthew Auld
2021-04-19 15:01                   ` Tvrtko Ursulin
2021-04-21 11:42                     ` Matthew Auld
2021-04-21 15:41                       ` Tvrtko Ursulin
2021-04-21 19:13                         ` Matthew Auld
2021-04-26  8:57                           ` Matthew Auld
2021-04-26  9:21                             ` Tvrtko Ursulin
2021-04-12  9:05 ` [PATCH 12/19] drm/i915/lmem: Bypass aperture when lmem is available Matthew Auld
2021-04-14 15:33   ` [Intel-gfx] " Tvrtko Ursulin
2021-04-16 14:25     ` Matthew Auld
2021-04-19 14:16       ` Tvrtko Ursulin
2021-04-12  9:05 ` [PATCH 13/19] drm/i915/dg1: Read OPROM via SPI controller Matthew Auld
2021-09-17 23:29   ` [Intel-gfx] " Lucas De Marchi
2021-04-12  9:05 ` [PATCH 14/19] drm/i915/oprom: Basic sanitization Matthew Auld
2021-04-12 22:36   ` [Intel-gfx] " kernel test robot
2021-04-12 22:36   ` [PATCH] drm/i915/oprom: fix memdup.cocci warnings kernel test robot
2021-05-17 11:57   ` [Intel-gfx] [PATCH 14/19] drm/i915/oprom: Basic sanitization Jani Nikula
2021-09-18  4:30     ` Lucas De Marchi
2021-09-20  7:41       ` Jani Nikula
2021-09-20  8:04         ` Gupta, Anshuman
2021-09-20  8:43           ` Jani Nikula
2021-09-22 21:53           ` Lucas De Marchi
2021-04-12  9:05 ` [PATCH 15/19] drm/i915: WA for zero memory channel Matthew Auld
2021-04-12 16:57   ` Souza, Jose
2021-04-12  9:05 ` [PATCH 16/19] drm/i915/dg1: Compute MEM Bandwidth using MCHBAR Matthew Auld
2021-04-12  9:05 ` [PATCH 17/19] drm/i915/dg1: Double memory bandwidth available Matthew Auld
2021-04-12  9:05 ` [PATCH 18/19] drm/i915/gtt: map the PD up front Matthew Auld
2021-04-12 15:17   ` [Intel-gfx] " Daniel Vetter
2021-04-12 16:01     ` Jani Nikula
2021-04-12 16:36       ` Daniel Vetter
2021-04-12 16:08     ` Matthew Auld
2021-04-12 17:00       ` Daniel Vetter
2021-04-13  9:28         ` Matthew Auld
2021-04-13 10:18           ` Daniel Vetter
2021-04-12  9:05 ` [PATCH 19/19] drm/i915/gtt/dgfx: place the PD in LMEM Matthew Auld
2021-04-14 15:37   ` [Intel-gfx] " Tvrtko Ursulin

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