[Intel-gfx] [PATCH] drm/i915:bxt: Enable Pooled EU support
Daniel Vetter
daniel at ffwll.ch
Wed Apr 20 12:49:58 UTC 2016
On Fri, Apr 15, 2016 at 09:47:21AM +0100, tim.gore at intel.com wrote:
> From: Tim Gore <tim.gore at intel.com>
>
> This is a re-send of patch 3/3 from Arun Siluvery's patch
> series "Add Pooled EU support to BXT", originally submitted
> 20 July 2015. Patches 1 and 2 are already merged in preparation.
> This final patch actually enables the feature. The rest of this
> commit message is taken from the original patch but edited slightly.
>
> This mode allows the assignment of EUs to pools which can
> process work collectively. The command to enable this mode
> should be issued as part of context initialization.
>
> The pooled mode is global, once enabled it has to stay the same across
> all contexts until HW reset hence this is sent in auxiliary golden context batch.
> Thanks to Mika for the preliminary review and comments.
>
> v2: explain why this is enabled in golden context, use feature flag
> while enabling the support (Chris)
>
> v3: Pooled EU support announced in userspace before enabling in
> kernel, to simplify include all changes in the same patch.
> User space clients need to know when the pooled EU feature is present
> and enabled on the hardware so that they can adapt work submissions to
> take advantage of the extra threads available.
> Create a new device info flag for this purpose, and create a new
> GETPARAM entry to allow user space to query its setting.
> Set has_pooled_eu to true in the Broxton static device info - Broxton
> supports the feature in hardware and the driver will enable it by
> default.
>
> Signed-off-by: Tim Gore <tim.gore at intel.com>
Please include link to the open source userspace patches (including
reviews and all that).
-Daniel
> ---
> drivers/gpu/drm/i915/i915_dma.c | 3 +++
> drivers/gpu/drm/i915/i915_drv.c | 1 +
> drivers/gpu/drm/i915/i915_drv.h | 5 ++++-
> drivers/gpu/drm/i915/i915_gem_render_state.c | 13 +++++++++++++
> drivers/gpu/drm/i915/i915_reg.h | 2 ++
> include/uapi/drm/i915_drm.h | 1 +
> 6 files changed, 24 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index b377753..22b7729 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -232,6 +232,9 @@ static int i915_getparam(struct drm_device *dev, void *data,
> case I915_PARAM_HAS_EXEC_SOFTPIN:
> value = 1;
> break;
> + case I915_PARAM_HAS_POOLED_EU:
> + value = HAS_POOLED_EU(dev);
> + break;
> default:
> DRM_DEBUG("Unknown parameter %d\n", param->param);
> return -EINVAL;
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 18eb3e6..ae3423d 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -353,6 +353,7 @@ static const struct intel_device_info intel_broxton_info = {
> .has_ddi = 1,
> .has_fpga_dbg = 1,
> .has_fbc = 1,
> + .has_pooled_eu = 1,
> GEN_DEFAULT_PIPEOFFSETS,
> IVB_CURSOR_OFFSETS,
> BDW_COLORS,
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index b9ed1b3..401c885 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -749,7 +749,8 @@ struct intel_csr {
> func(has_llc) sep \
> func(has_snoop) sep \
> func(has_ddi) sep \
> - func(has_fpga_dbg)
> + func(has_fpga_dbg) sep \
> + func(has_pooled_eu)
>
> #define DEFINE_FLAG(name) u8 name:1
> #define SEP_SEMICOLON ;
> @@ -2699,6 +2700,8 @@ struct drm_i915_cmd_table {
> !IS_VALLEYVIEW(dev) && !IS_CHERRYVIEW(dev) && \
> !IS_BROXTON(dev))
>
> +#define HAS_POOLED_EU(dev) (INTEL_INFO(dev)->has_pooled_eu)
> +
> #define INTEL_PCH_DEVICE_ID_MASK 0xff00
> #define INTEL_PCH_IBX_DEVICE_ID_TYPE 0x3b00
> #define INTEL_PCH_CPT_DEVICE_ID_TYPE 0x1c00
> diff --git a/drivers/gpu/drm/i915/i915_gem_render_state.c b/drivers/gpu/drm/i915/i915_gem_render_state.c
> index 71611bf..da0b796 100644
> --- a/drivers/gpu/drm/i915/i915_gem_render_state.c
> +++ b/drivers/gpu/drm/i915/i915_gem_render_state.c
> @@ -93,6 +93,7 @@ free_gem:
>
> static int render_state_setup(struct render_state *so)
> {
> + struct drm_device *dev = so->obj->base.dev;
> const struct intel_renderstate_rodata *rodata = so->rodata;
> unsigned int i = 0, reloc_index = 0;
> struct page *page;
> @@ -134,6 +135,18 @@ static int render_state_setup(struct render_state *so)
>
> so->aux_batch_offset = i * sizeof(u32);
>
> + if (HAS_POOLED_EU(dev)) {
> + u32 pool_config = (INTEL_INFO(dev)->subslice_total == 3 ?
> + 0x00777000 : 0);
> +
> + OUT_BATCH(d, i, GEN9_MEDIA_POOL_STATE);
> + OUT_BATCH(d, i, GEN9_MEDIA_POOL_ENABLE);
> + OUT_BATCH(d, i, pool_config);
> + OUT_BATCH(d, i, 0);
> + OUT_BATCH(d, i, 0);
> + OUT_BATCH(d, i, 0);
> + }
> +
> OUT_BATCH(d, i, MI_BATCH_BUFFER_END);
> so->aux_batch_size = (i * sizeof(u32)) - so->aux_batch_offset;
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index d0a1928..d3f859d 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -424,6 +424,8 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
> */
> #define GFX_INSTR(opcode, flags) ((0x3 << 29) | ((opcode) << 24) | (flags))
>
> +#define GEN9_MEDIA_POOL_STATE ((0x3 << 29) | (0x2 << 27) | (0x5 << 16) | 4)
> +#define GEN9_MEDIA_POOL_ENABLE (1 << 31)
> #define GFX_OP_RASTER_RULES ((0x3<<29)|(0x7<<24))
> #define GFX_OP_SCISSOR ((0x3<<29)|(0x1c<<24)|(0x10<<19))
> #define SC_UPDATE_SCISSOR (0x1<<1)
> diff --git a/include/uapi/drm/i915_drm.h b/include/uapi/drm/i915_drm.h
> index a5524cc..65175fd 100644
> --- a/include/uapi/drm/i915_drm.h
> +++ b/include/uapi/drm/i915_drm.h
> @@ -357,6 +357,7 @@ typedef struct drm_i915_irq_wait {
> #define I915_PARAM_HAS_GPU_RESET 35
> #define I915_PARAM_HAS_RESOURCE_STREAMER 36
> #define I915_PARAM_HAS_EXEC_SOFTPIN 37
> +#define I915_PARAM_HAS_POOLED_EU 38
>
> typedef struct drm_i915_getparam {
> __s32 param;
> --
> 1.9.1
>
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--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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