linux-kernel - [PATCH 4.9 090/191] drm/i915: Whitelist context-local timestamp in the gen9 cmdparser

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Message-Id: <20200629154007.2495120-91-sashal@kernel.org>
Date:   Mon, 29 Jun 2020 11:38:26 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Chris Wilson <chris@...is-wilson.co.uk>,
        Mika Kuoppala <mika.kuoppala@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH 4.9 090/191] drm/i915: Whitelist context-local timestamp in the gen9 cmdparser

From: Chris Wilson <chris@...is-wilson.co.uk>

commit 273500ae71711c040d258a7b3f4b6f44c368fff2 upstream.

Allow batch buffers to read their own _local_ cumulative HW runtime of
their logical context.

Fixes: 0f2f39758341 ("drm/i915: Add gen9 BCS cmdparsing")
Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@...ux.intel.com>
Cc: <stable@...r.kernel.org> # v5.4+
Reviewed-by: Mika Kuoppala <mika.kuoppala@...ux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200601161942.30854-1-chris@chris-wilson.co.uk
(cherry picked from commit f9496520df11de00fbafc3cbd693b9570d600ab3)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/i915/i915_cmd_parser.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 1e104518192da..8a98442d494b4 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -570,6 +570,9 @@ struct drm_i915_reg_descriptor {
 #define REG32(_reg, ...) \
 	{ .addr = (_reg), __VA_ARGS__ }
 
+#define REG32_IDX(_reg, idx) \
+	{ .addr = _reg(idx) }
+
 /*
  * Convenience macro for adding 64-bit registers.
  *
@@ -667,6 +670,7 @@ static const struct drm_i915_reg_descriptor gen9_blt_regs[] = {
 	REG64_IDX(RING_TIMESTAMP, BSD_RING_BASE),
 	REG32(BCS_SWCTRL),
 	REG64_IDX(RING_TIMESTAMP, BLT_RING_BASE),
+	REG32_IDX(RING_CTX_TIMESTAMP, BLT_RING_BASE),
 	REG64_IDX(BCS_GPR, 0),
 	REG64_IDX(BCS_GPR, 1),
 	REG64_IDX(BCS_GPR, 2),
-- 
2.25.1