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Subject[PATCH 4.9 090/191] drm/i915: Whitelist context-local timestamp in the gen9 cmdparser
Date
From: Chris Wilson <chris@chris-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@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: <stable@vger.kernel.org> # v5.4+
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.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@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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
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