| Message ID | 20220328172551.43309-1-matthew.auld@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [CI,1/4] drm/i915/gt: Explicitly clear BB_OFFSET for new contexts | expand |
On 28/03/2022 18:25, Matthew Auld wrote: > From: Chris Wilson <chris@chris-wilson.co.uk> > > Even though the initial protocontext we load onto HW has the register > cleared, by the time we save it into the default image, BB_OFFSET has > had the enable bit set. Reclear BB_OFFSET for each new context. Intriguing - is there any impact to this which would require cc: stable? Regards, Tvrtko > Testcase: igt/i915_selftests/gt_lrc > > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> > Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com> > Signed-off-by: Ramalingam C <ramalingam.c@intel.com> > --- > drivers/gpu/drm/i915/gt/intel_engine_regs.h | 1 + > drivers/gpu/drm/i915/gt/intel_lrc.c | 17 +++++++++++++++++ > drivers/gpu/drm/i915/gt/selftest_lrc.c | 5 +++++ > 3 files changed, 23 insertions(+) > > diff --git a/drivers/gpu/drm/i915/gt/intel_engine_regs.h b/drivers/gpu/drm/i915/gt/intel_engine_regs.h > index 0bf8b45c9319..d6da3bbf66f8 100644 > --- a/drivers/gpu/drm/i915/gt/intel_engine_regs.h > +++ b/drivers/gpu/drm/i915/gt/intel_engine_regs.h > @@ -109,6 +109,7 @@ > #define RING_SBBSTATE(base) _MMIO((base) + 0x118) /* hsw+ */ > #define RING_SBBADDR_UDW(base) _MMIO((base) + 0x11c) /* gen8+ */ > #define RING_BBADDR(base) _MMIO((base) + 0x140) > +#define RING_BB_OFFSET(base) _MMIO((base) + 0x158) > #define RING_BBADDR_UDW(base) _MMIO((base) + 0x168) /* gen8+ */ > #define CCID(base) _MMIO((base) + 0x180) > #define CCID_EN BIT(0) > diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c > index 07bef7128fdb..f673bae97a03 100644 > --- a/drivers/gpu/drm/i915/gt/intel_lrc.c > +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c > @@ -662,6 +662,18 @@ static int lrc_ring_mi_mode(const struct intel_engine_cs *engine) > return -1; > } > > +static int lrc_ring_bb_offset(const struct intel_engine_cs *engine) > +{ > + if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) > + return 0x80; > + else if (GRAPHICS_VER(engine->i915) >= 12) > + return 0x70; > + else if (GRAPHICS_VER(engine->i915) >= 9) > + return 0x64; > + else > + return -1; > +} > + > static int lrc_ring_gpr0(const struct intel_engine_cs *engine) > { > if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) > @@ -768,6 +780,7 @@ static void init_common_regs(u32 * const regs, > bool inhibit) > { > u32 ctl; > + int loc; > > ctl = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH); > ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); > @@ -779,6 +792,10 @@ static void init_common_regs(u32 * const regs, > regs[CTX_CONTEXT_CONTROL] = ctl; > > regs[CTX_TIMESTAMP] = ce->runtime.last; > + > + loc = lrc_ring_bb_offset(engine); > + if (loc != -1) > + regs[loc + 1] = 0; > } > > static void init_wa_bb_regs(u32 * const regs, > diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c > index 21c29d315cc0..13f57c7c4224 100644 > --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c > +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c > @@ -323,6 +323,11 @@ static int live_lrc_fixed(void *arg) > lrc_ring_cmd_buf_cctl(engine), > "RING_CMD_BUF_CCTL" > }, > + { > + i915_mmio_reg_offset(RING_BB_OFFSET(engine->mmio_base)), > + lrc_ring_bb_offset(engine), > + "RING_BB_OFFSET" > + }, > { }, > }, *t; > u32 *hw;
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_regs.h b/drivers/gpu/drm/i915/gt/intel_engine_regs.h index 0bf8b45c9319..d6da3bbf66f8 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_regs.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_regs.h @@ -109,6 +109,7 @@ #define RING_SBBSTATE(base) _MMIO((base) + 0x118) /* hsw+ */ #define RING_SBBADDR_UDW(base) _MMIO((base) + 0x11c) /* gen8+ */ #define RING_BBADDR(base) _MMIO((base) + 0x140) +#define RING_BB_OFFSET(base) _MMIO((base) + 0x158) #define RING_BBADDR_UDW(base) _MMIO((base) + 0x168) /* gen8+ */ #define CCID(base) _MMIO((base) + 0x180) #define CCID_EN BIT(0) diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 07bef7128fdb..f673bae97a03 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -662,6 +662,18 @@ static int lrc_ring_mi_mode(const struct intel_engine_cs *engine) return -1; } +static int lrc_ring_bb_offset(const struct intel_engine_cs *engine) +{ + if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) + return 0x80; + else if (GRAPHICS_VER(engine->i915) >= 12) + return 0x70; + else if (GRAPHICS_VER(engine->i915) >= 9) + return 0x64; + else + return -1; +} + static int lrc_ring_gpr0(const struct intel_engine_cs *engine) { if (GRAPHICS_VER_FULL(engine->i915) >= IP_VER(12, 50)) @@ -768,6 +780,7 @@ static void init_common_regs(u32 * const regs, bool inhibit) { u32 ctl; + int loc; ctl = _MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH); ctl |= _MASKED_BIT_DISABLE(CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT); @@ -779,6 +792,10 @@ static void init_common_regs(u32 * const regs, regs[CTX_CONTEXT_CONTROL] = ctl; regs[CTX_TIMESTAMP] = ce->runtime.last; + + loc = lrc_ring_bb_offset(engine); + if (loc != -1) + regs[loc + 1] = 0; } static void init_wa_bb_regs(u32 * const regs, diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c index 21c29d315cc0..13f57c7c4224 100644 --- a/drivers/gpu/drm/i915/gt/selftest_lrc.c +++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c @@ -323,6 +323,11 @@ static int live_lrc_fixed(void *arg) lrc_ring_cmd_buf_cctl(engine), "RING_CMD_BUF_CCTL" }, + { + i915_mmio_reg_offset(RING_BB_OFFSET(engine->mmio_base)), + lrc_ring_bb_offset(engine), + "RING_BB_OFFSET" + }, { }, }, *t; u32 *hw;