[PATCH 2/2] drm/i915/mtl: Add C6 residency support for MTL SAMedia
Jani Nikula
jani.nikula at linux.intel.com
Mon Sep 19 12:13:18 UTC 2022
On Mon, 19 Sep 2022, Badal Nilawar <badal.nilawar at intel.com> wrote:
> For MTL SAMedia updated relevant functions and places in the code to get
> Media C6 residency.
>
> v2: Fixed review comments (Ashutosh)
>
> Cc: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
> Cc: Ashutosh Dixit <ashutosh.dixit at intel.com>
> Cc: Chris Wilson <chris.p.wilson at intel.com>
> Signed-off-by: Badal Nilawar <badal.nilawar at intel.com>
> ---
> drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c | 60 +++++++++++++++++++
> drivers/gpu/drm/i915/gt/intel_gt_regs.h | 10 ++++
> drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c | 9 ++-
> drivers/gpu/drm/i915/gt/intel_rc6.c | 5 +-
> drivers/gpu/drm/i915/gt/selftest_rc6.c | 9 ++-
> drivers/gpu/drm/i915/i915_pmu.c | 8 ++-
> 6 files changed, 97 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c b/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c
> index 68310881a793..053167b506a9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_pm_debugfs.c
> @@ -269,6 +269,64 @@ static int ilk_drpc(struct seq_file *m)
> return 0;
> }
>
> +static int mtl_drpc(struct seq_file *m)
> +{
> + struct intel_gt *gt = m->private;
> + struct intel_uncore *uncore = gt->uncore;
> + u32 gt_core_status, rcctl1, global_forcewake;
> + u32 mtl_powergate_enable = 0, mtl_powergate_status = 0;
> + i915_reg_t reg;
> +
> + gt_core_status = intel_uncore_read(uncore, MTL_MIRROR_TARGET_WP1);
> +
> + global_forcewake = intel_uncore_read(uncore, FORCEWAKE_GT_GEN9);
> +
> + rcctl1 = intel_uncore_read(uncore, GEN6_RC_CONTROL);
> + mtl_powergate_enable = intel_uncore_read(uncore, GEN9_PG_ENABLE);
> + mtl_powergate_status = intel_uncore_read(uncore,
> + GEN9_PWRGT_DOMAIN_STATUS);
> +
> + seq_printf(m, "RC6 Enabled: %s\n",
> + str_yes_no(rcctl1 & GEN6_RC_CTL_RC6_ENABLE));
> + if (gt->type == GT_MEDIA) {
> + seq_printf(m, "Media Well Gating Enabled: %s\n",
> + str_yes_no(mtl_powergate_enable & GEN9_MEDIA_PG_ENABLE));
> + } else {
> + seq_printf(m, "Render Well Gating Enabled: %s\n",
> + str_yes_no(mtl_powergate_enable & GEN9_RENDER_PG_ENABLE));
> + }
> +
> + seq_puts(m, "Current RC state: ");
> +
> + switch ((gt_core_status & MTL_CC_MASK) >> MTL_CC_SHIFT) {
> + case MTL_CC0:
> + seq_puts(m, "on\n");
> + break;
> + case MTL_CC6:
> + seq_puts(m, "RC6\n");
> + break;
> + default:
> + seq_puts(m, "Unknown\n");
> + break;
> + }
> +
> + if (gt->type == GT_MEDIA)
> + seq_printf(m, "Media Power Well: %s\n",
> + (mtl_powergate_status &
> + GEN9_PWRGT_MEDIA_STATUS_MASK) ? "Up" : "Down");
> + else
> + seq_printf(m, "Render Power Well: %s\n",
> + (mtl_powergate_status &
> + GEN9_PWRGT_RENDER_STATUS_MASK) ? "Up" : "Down");
> +
> + reg = (gt->type == GT_MEDIA) ? MTL_MEDIA_MC6 : GEN6_GT_GFX_RC6;
> + print_rc6_res(m, "RC6 residency since boot:", reg);
Cc: Tvrtko, Joonas, Rodrigo
IMO the register is not a good abstraction to build interfaces on. I see
that this is not where the idea is introduced, but it'll probably get
you in trouble later on.
BR,
Jani.
> +
> + seq_printf(m, "Global Forcewake Requests: 0x%x\n", global_forcewake);
> +
> + return fw_domains_show(m, NULL);
> +}
> +
> static int drpc_show(struct seq_file *m, void *unused)
> {
> struct intel_gt *gt = m->private;
> @@ -279,6 +337,8 @@ static int drpc_show(struct seq_file *m, void *unused)
> with_intel_runtime_pm(gt->uncore->rpm, wakeref) {
> if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
> err = vlv_drpc(m);
> + else if (GRAPHICS_VER_FULL(i915) >= IP_VER(12, 70))
> + err = mtl_drpc(m);
> else if (GRAPHICS_VER(i915) >= 6)
> err = gen6_drpc(m);
> else
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_regs.h b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> index 7819d32db956..8a56fd873228 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_regs.h
> @@ -1517,6 +1517,16 @@
> */
> #define MTL_MIRROR_TARGET_WP1 _MMIO(0x0C60)
> #define MTL_CAGF_MASK REG_GENMASK(8, 0)
> +#define MTL_CC0 0x0
> +#define MTL_CC6 0x3
> +#define MTL_CC_SHIFT 9
> +#define MTL_CC_MASK (0xf << MTL_CC_SHIFT)
> +
> +/*
> + * MTL: This register contains the total MC6 residency time that SAMedia was
> + * since boot
> + */
> +#define MTL_MEDIA_MC6 _MMIO(0x138048)
>
> #define GEN11_GT_INTR_DW(x) _MMIO(0x190018 + ((x) * 4))
> #define GEN11_CSME (31)
> diff --git a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> index 54deae45d81f..7ab1d776673a 100644
> --- a/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_gt_sysfs_pm.c
> @@ -123,7 +123,14 @@ static ssize_t rc6_enable_show(struct device *dev,
>
> static u32 __rc6_residency_ms_show(struct intel_gt *gt)
> {
> - return get_residency(gt, GEN6_GT_GFX_RC6);
> + i915_reg_t reg;
> +
> + if (gt->type == GT_MEDIA)
> + reg = MTL_MEDIA_MC6;
> + else
> + reg = GEN6_GT_GFX_RC6;
> +
> + return get_residency(gt, reg);
> }
>
> static ssize_t rc6_residency_ms_show(struct device *dev,
> diff --git a/drivers/gpu/drm/i915/gt/intel_rc6.c b/drivers/gpu/drm/i915/gt/intel_rc6.c
> index f8d0523f4c18..26f71f7f07c6 100644
> --- a/drivers/gpu/drm/i915/gt/intel_rc6.c
> +++ b/drivers/gpu/drm/i915/gt/intel_rc6.c
> @@ -745,6 +745,7 @@ u64 intel_rc6_residency_ns(struct intel_rc6 *rc6, const i915_reg_t reg)
> unsigned long flags;
> unsigned int i;
> u32 mul, div;
> + i915_reg_t base;
>
> if (!rc6->supported)
> return 0;
> @@ -756,8 +757,10 @@ u64 intel_rc6_residency_ns(struct intel_rc6 *rc6, const i915_reg_t reg)
> * other so we can use the relative address, compared to the smallest
> * one as the index into driver storage.
> */
> + base = (rc6_to_gt(rc6)->type == GT_MEDIA) ?
> + MTL_MEDIA_MC6 : GEN6_GT_GFX_RC6_LOCKED;
> i = (i915_mmio_reg_offset(reg) -
> - i915_mmio_reg_offset(GEN6_GT_GFX_RC6_LOCKED)) / sizeof(u32);
> + i915_mmio_reg_offset(base)) / sizeof(u32);
> if (drm_WARN_ON_ONCE(&i915->drm, i >= ARRAY_SIZE(rc6->cur_residency)))
> return 0;
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_rc6.c b/drivers/gpu/drm/i915/gt/selftest_rc6.c
> index 8c70b7e12074..28c6a4b6b8d1 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_rc6.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_rc6.c
> @@ -15,11 +15,18 @@
>
> static u64 rc6_residency(struct intel_rc6 *rc6)
> {
> + struct intel_gt *gt = rc6_to_gt(rc6);
> + i915_reg_t reg;
> u64 result;
>
> /* XXX VLV_GT_MEDIA_RC6? */
>
> - result = intel_rc6_residency_ns(rc6, GEN6_GT_GFX_RC6);
> + if (gt->type == GT_MEDIA)
> + reg = MTL_MEDIA_MC6;
> + else
> + reg = GEN6_GT_GFX_RC6;
> +
> + result = intel_rc6_residency_ns(rc6, reg);
> if (HAS_RC6p(rc6_to_i915(rc6)))
> result += intel_rc6_residency_ns(rc6, GEN6_GT_GFX_RC6p);
> if (HAS_RC6pp(rc6_to_i915(rc6)))
> diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
> index 958b37123bf1..6ec139668641 100644
> --- a/drivers/gpu/drm/i915/i915_pmu.c
> +++ b/drivers/gpu/drm/i915/i915_pmu.c
> @@ -146,9 +146,15 @@ static bool pmu_needs_timer(struct i915_pmu *pmu, bool gpu_active)
> static u64 __get_rc6(struct intel_gt *gt)
> {
> struct drm_i915_private *i915 = gt->i915;
> + i915_reg_t reg;
> u64 val;
>
> - val = intel_rc6_residency_ns(>->rc6, GEN6_GT_GFX_RC6);
> + if (gt->type == GT_MEDIA)
> + reg = MTL_MEDIA_MC6;
> + else
> + reg = GEN6_GT_GFX_RC6;
> +
> + val = intel_rc6_residency_ns(>->rc6, reg);
>
> if (HAS_RC6p(i915))
> val += intel_rc6_residency_ns(>->rc6, GEN6_GT_GFX_RC6p);
--
Jani Nikula, Intel Open Source Graphics Center
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