[Intel-xe] [PATCH v3 3/3] drm/xe: Add INSTDONE registers to devcoredump
Matt Roper
matthew.d.roper at intel.com
Thu Oct 12 19:07:27 UTC 2023
On Thu, Oct 12, 2023 at 11:46:08AM -0700, Souza, Jose wrote:
> On Thu, 2023-10-12 at 10:46 -0700, Matt Roper wrote:
> > On Tue, Oct 10, 2023 at 11:41:51AM -0700, José Roberto de Souza wrote:
> > > This registers contains important information that can help with debug
> > > of GPU hangs.
> > >
> > > While at it also fixing the double line jump at the end of engine
> > > registers for CCS engines.
> > >
> > > v2:
> > > - print other INSTDONE registers
> > >
> > > v3:
> > > - add for_each_geometry/compute_dss()
> > >
> > > Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> > > Cc: Matt Roper <matthew.d.roper at intel.com>
> > > Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> > > ---
> > > drivers/gpu/drm/xe/regs/xe_engine_regs.h | 1 +
> > > drivers/gpu/drm/xe/regs/xe_gt_regs.h | 9 ++
> > > drivers/gpu/drm/xe/xe_hw_engine.c | 100 ++++++++++++++++++++++-
> > > drivers/gpu/drm/xe/xe_hw_engine_types.h | 10 +++
> > > 4 files changed, 117 insertions(+), 3 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/xe/regs/xe_engine_regs.h b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
> > > index 35dd4837dd75f..32465e384fc24 100644
> > > --- a/drivers/gpu/drm/xe/regs/xe_engine_regs.h
> > > +++ b/drivers/gpu/drm/xe/regs/xe_engine_regs.h
> > > @@ -32,6 +32,7 @@
> > > #define RING_ACTHD_UDW(base) XE_REG((base) + 0x5c)
> > > #define RING_DMA_FADD_UDW(base) XE_REG((base) + 0x60)
> > > #define RING_IPEHR(base) XE_REG((base) + 0x68)
> > > +#define RING_INSTDONE(base) XE_REG((base) + 0x6c)
> > > #define RING_ACTHD(base) XE_REG((base) + 0x74)
> > > #define RING_DMA_FADD(base) XE_REG((base) + 0x78)
> > > #define RING_HWS_PGA(base) XE_REG((base) + 0x80)
> > > diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> > > index cd1821d96a5d8..c6650124ae6a6 100644
> > > --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> > > +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h
> > > @@ -105,6 +105,8 @@
> > > #define FF_MODE2_TDS_TIMER_MASK REG_GENMASK(23, 16)
> > > #define FF_MODE2_TDS_TIMER_128 REG_FIELD_PREP(FF_MODE2_TDS_TIMER_MASK, 4)
> > >
> > > +#define XEHPG_INSTDONE_GEOM_SVG XE_REG_MCR(0x666c)
> > > +
> > > #define CACHE_MODE_1 XE_REG(0x7004, XE_REG_OPTION_MASKED)
> > > #define MSAA_OPTIMIZATION_REDUC_DISABLE REG_BIT(11)
> > >
> > > @@ -117,6 +119,10 @@
> > >
> > > #define COMMON_SLICE_CHICKEN1 XE_REG(0x7010)
> > >
> > > +#define SLICE_COMMON_INSTDONE XE_REG(0x7100)
> > > +#define SLICE_COMMON_INSTDONE_EXTRA XE_REG(0x7104)
> > > +#define SLICE_COMMON_INSTDONE_EXTRA2 XE_REG(0x7108)
> >
> > These three are MCR registers on Xe_HP and beyond (one instance per
> > gslice).
>
> Where I can look for all MCR registers? In the definition of this register there is nothing special... but makes sense.
Same bspec page as forcewake. E.g., 66534 for DG2, 67788 for MTL, 74417
for Xe2, etc. The "multicast / replicated" column tells you whether
something is multicast or not, and the "replication group type" tells
you the specific type of replication (per gslice, per DSS, per l3bank,
etc.). The rules for how to encode the target into the group/instance
fields of the steering register are given farther down near the bottom
of the page.
>
> i915 would also need to have it fixed.
Yeah, if these values are actually useful to debug then it would make
sense to fix there too. If there are any other mis-handled MCR
registers that aren't actually useful for debug, we could also just drop
those (I think we've done that in the past in some places where nobody
noticed for years that they weren't getting meaningful values).
Matt
>
> >
> >
> > Matt
> >
> > > +
> > > #define COMMON_SLICE_CHICKEN4 XE_REG(0x7300, XE_REG_OPTION_MASKED)
> > > #define DISABLE_TDC_LOAD_BALANCING_CALC REG_BIT(6)
> > >
> > > @@ -299,6 +305,9 @@
> > > #define XE_OAG_BLT_BUSY_FREE XE_REG(0xdbbc)
> > > #define XE_OAG_RENDER_BUSY_FREE XE_REG(0xdbdc)
> > >
> > > +#define SAMPLER_INSTDONE XE_REG_MCR(0xe160)
> > > +#define ROW_INSTDONE XE_REG_MCR(0xe164)
> > > +
> > > #define SAMPLER_MODE XE_REG_MCR(0xe18c, XE_REG_OPTION_MASKED)
> > > #define ENABLE_SMALLPL REG_BIT(15)
> > > #define SC_DISABLE_POWER_OPTIMIZATION_EBB REG_BIT(9)
> > > diff --git a/drivers/gpu/drm/xe/xe_hw_engine.c b/drivers/gpu/drm/xe/xe_hw_engine.c
> > > index 37b3ee1268090..6e144859abb1a 100644
> > > --- a/drivers/gpu/drm/xe/xe_hw_engine.c
> > > +++ b/drivers/gpu/drm/xe/xe_hw_engine.c
> > > @@ -16,6 +16,7 @@
> > > #include "xe_execlist.h"
> > > #include "xe_force_wake.h"
> > > #include "xe_gt.h"
> > > +#include "xe_gt_mcr.h"
> > > #include "xe_gt_topology.h"
> > > #include "xe_hw_fence.h"
> > > #include "xe_irq.h"
> > > @@ -655,6 +656,40 @@ void xe_hw_engine_handle_irq(struct xe_hw_engine *hwe, u16 intr_vec)
> > > xe_hw_fence_irq_run(hwe->fence_irq);
> > > }
> > >
> > > +static void
> > > +xe_he_engine_snapshot_instdone_capture(struct xe_hw_engine *hwe,
> > > + struct xe_hw_engine_snapshot *snapshot)
> > > +{
> > > + struct xe_gt *gt = hwe->gt;
> > > + struct xe_device *xe = gt_to_xe(gt);
> > > + unsigned int dss;
> > > + int group, instance;
> > > +
> > > + snapshot->reg.instdone.ring = hw_engine_mmio_read32(hwe, RING_INSTDONE(0));
> > > +
> > > + if (snapshot->hwe->class != XE_ENGINE_CLASS_RENDER)
> > > + return;
> > > +
> > > + snapshot->reg.instdone.slice_common =
> > > + xe_mmio_read32(gt, SLICE_COMMON_INSTDONE);
> > > + snapshot->reg.instdone.slice_common_extra =
> > > + xe_mmio_read32(gt, SLICE_COMMON_INSTDONE_EXTRA);
> > > + snapshot->reg.instdone.slice_common_extra2 =
> > > + xe_mmio_read32(gt, SLICE_COMMON_INSTDONE_EXTRA2);
> > > +
> > > + for_each_geometry_dss(gt, dss, group, instance) {
> > > + snapshot->reg.instdone.sampler[dss] =
> > > + xe_gt_mcr_unicast_read(gt, SAMPLER_INSTDONE, group, instance);
> > > + snapshot->reg.instdone.row[dss] =
> > > + xe_gt_mcr_unicast_read(gt, ROW_INSTDONE, group, instance);
> > > +
> > > + if (GRAPHICS_VERx100(xe) >= 1255)
> > > + snapshot->reg.instdone.geom_svg[dss] =
> > > + xe_gt_mcr_unicast_read(gt, XEHPG_INSTDONE_GEOM_SVG,
> > > + group, instance);
> > > + }
> > > +}
> > > +
> > > /**
> > > * xe_hw_engine_snapshot_capture - Take a quick snapshot of the HW Engine.
> > > * @hwe: Xe HW Engine.
> > > @@ -679,10 +714,30 @@ xe_hw_engine_snapshot_capture(struct xe_hw_engine *hwe)
> > > if (!snapshot)
> > > return NULL;
> > >
> > > + /* Because XE_MAX_DSS_FUSE_BITS is defined in xe_gt_types.h and it
> > > + * includes xe_hw_engine_types.h the length of this 3 registers can't be
> > > + * set in struct xe_hw_engine_snapshot, so here doing additional
> > > + * allocations.
> > > + */
> > > + len = (XE_MAX_DSS_FUSE_BITS * sizeof(u32));
> > > + snapshot->reg.instdone.sampler = kzalloc(len, GFP_ATOMIC);
> > > + snapshot->reg.instdone.row = kzalloc(len, GFP_ATOMIC);
> > > + snapshot->reg.instdone.geom_svg = kzalloc(len, GFP_ATOMIC);
> > > + if (!snapshot->reg.instdone.sampler ||
> > > + !snapshot->reg.instdone.row ||
> > > + !snapshot->reg.instdone.geom_svg) {
> > > + xe_hw_engine_snapshot_free(snapshot);
> > > + return NULL;
> > > + }
> > > +
> > > len = strlen(hwe->name) + 1;
> > > snapshot->name = kzalloc(len, GFP_ATOMIC);
> > > - if (snapshot->name)
> > > - strscpy(snapshot->name, hwe->name, len);
> > > + if (!snapshot->name) {
> > > + xe_hw_engine_snapshot_free(snapshot);
> > > + return NULL;
> > > + }
> > > +
> > > + strscpy(snapshot->name, hwe->name, len);
> > >
> > > snapshot->hwe = hwe;
> > > snapshot->logical_instance = hwe->logical_instance;
> > > @@ -730,6 +785,7 @@ xe_hw_engine_snapshot_capture(struct xe_hw_engine *hwe)
> > > snapshot->reg.ring_dma_fadd =
> > > hw_engine_mmio_read32(hwe, RING_DMA_FADD(0));
> > > snapshot->reg.ipehr = hw_engine_mmio_read32(hwe, RING_IPEHR(0));
> > > + xe_he_engine_snapshot_instdone_capture(hwe, snapshot);
> > >
> > > if (snapshot->hwe->class == XE_ENGINE_CLASS_COMPUTE)
> > > snapshot->reg.rcu_mode = xe_mmio_read32(hwe->gt, RCU_MODE);
> > > @@ -737,6 +793,38 @@ xe_hw_engine_snapshot_capture(struct xe_hw_engine *hwe)
> > > return snapshot;
> > > }
> > >
> > > +static void
> > > +xe_hw_engine_snapshot_instdone_print(struct xe_hw_engine_snapshot *snapshot, struct drm_printer *p)
> > > +{
> > > + struct xe_gt *gt = snapshot->hwe->gt;
> > > + struct xe_device *xe = gt_to_xe(gt);
> > > + unsigned int dss;
> > > + int group, instance;
> > > +
> > > + drm_printf(p, "\tRING_INSTDONE: 0x%08x\n", snapshot->reg.instdone.ring);
> > > +
> > > + if (snapshot->hwe->class != XE_ENGINE_CLASS_RENDER)
> > > + return;
> > > +
> > > + drm_printf(p, "\tSC_INSTDONE: 0x%08x\n",
> > > + snapshot->reg.instdone.slice_common);
> > > + drm_printf(p, "\tSC_EXTRA_INSTDONE: 0x%08x\n",
> > > + snapshot->reg.instdone.slice_common_extra);
> > > + drm_printf(p, "\tSC_EXTRA2_INSTDONE: 0x%08x\n",
> > > + snapshot->reg.instdone.slice_common_extra2);
> > > +
> > > + for_each_geometry_dss(gt, dss, group, instance) {
> > > + drm_printf(p, "\tSAMPLER_INSTDONE[%u]: 0x%08x\n", dss,
> > > + snapshot->reg.instdone.sampler[dss]);
> > > + drm_printf(p, "\tROW_INSTDONE[%u]: 0x%08x\n", dss,
> > > + snapshot->reg.instdone.row[dss]);
> > > +
> > > + if (GRAPHICS_VERx100(xe) >= 1255)
> > > + drm_printf(p, "\tGEOM_SVGUNIT_INSTDONE[%u]: 0x%08x\n",
> > > + dss, snapshot->reg.instdone.geom_svg[dss]);
> > > + }
> > > +}
> > > +
> > > /**
> > > * xe_hw_engine_snapshot_print - Print out a given Xe HW Engine snapshot.
> > > * @snapshot: Xe HW Engine snapshot object.
> > > @@ -785,10 +873,13 @@ void xe_hw_engine_snapshot_print(struct xe_hw_engine_snapshot *snapshot,
> > > drm_printf(p, "\tDMA_FADDR: 0x%08x_%08x\n",
> > > snapshot->reg.ring_dma_fadd_udw,
> > > snapshot->reg.ring_dma_fadd);
> > > - drm_printf(p, "\tIPEHR: 0x%08x\n\n", snapshot->reg.ipehr);
> > > + drm_printf(p, "\tIPEHR: 0x%08x\n", snapshot->reg.ipehr);
> > > + xe_hw_engine_snapshot_instdone_print(snapshot, p);
> > > +
> > > if (snapshot->hwe->class == XE_ENGINE_CLASS_COMPUTE)
> > > drm_printf(p, "\tRCU_MODE: 0x%08x\n",
> > > snapshot->reg.rcu_mode);
> > > + drm_puts(p, "\n");
> > > }
> > >
> > > /**
> > > @@ -803,6 +894,9 @@ void xe_hw_engine_snapshot_free(struct xe_hw_engine_snapshot *snapshot)
> > > if (!snapshot)
> > > return;
> > >
> > > + kfree(snapshot->reg.instdone.sampler);
> > > + kfree(snapshot->reg.instdone.row);
> > > + kfree(snapshot->reg.instdone.geom_svg);
> > > kfree(snapshot->name);
> > > kfree(snapshot);
> > > }
> > > diff --git a/drivers/gpu/drm/xe/xe_hw_engine_types.h b/drivers/gpu/drm/xe/xe_hw_engine_types.h
> > > index 71c0a0169e62a..0a10a79962c97 100644
> > > --- a/drivers/gpu/drm/xe/xe_hw_engine_types.h
> > > +++ b/drivers/gpu/drm/xe/xe_hw_engine_types.h
> > > @@ -221,6 +221,16 @@ struct xe_hw_engine_snapshot {
> > > u32 ipehr;
> > > /** @rcu_mode: RCU_MODE */
> > > u32 rcu_mode;
> > > + /** @ring_instdone: RING_INSTDONE */
> > > + struct {
> > > + u32 ring;
> > > + u32 slice_common;
> > > + u32 slice_common_extra;
> > > + u32 slice_common_extra2;
> > > + u32 *sampler;
> > > + u32 *row;
> > > + u32 *geom_svg;
> > > + } instdone;
> > > } reg;
> > > };
> > >
> > > --
> > > 2.42.0
> > >
> >
>
--
Matt Roper
Graphics Software Engineer
Linux GPU Platform Enablement
Intel Corporation
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