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drm/i915: Enable resource streamer on Execlists 

GEN8 and above uses Execlists by default instead of the legacy
ringbuffer for batch execution. This patch enables the resource
streamer bits when required.

Patch is based on the initial work by Minu Mathai <minu.mathai@intel.com>
This version also adds the required bits to enable GEN8 Resource
Streamer context save and restore for Execlists.

Cc: ville.syrjala@linux.intel.com
Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com>
Reviewed-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Abdiel Janulgue 2015-06-16 13:39:42 +03:00 committed by Daniel Vetter
parent 4c436d55b2
commit 6922528a04
2 changed files with 7 additions and 2 deletions
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8
drivers/gpu/drm/i915/intel_lrc.c
View File

@ -1426,7 +1426,10 @@ static int gen8_emit_bb_start(struct drm_i915_gem_request *req,
return ret;
/* FIXME(BDW): Address space and security selectors. */
intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 | (ppgtt<<8));
intel_logical_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 |
(ppgtt<<8) |
(dispatch_flags & I915_DISPATCH_RS ?
MI_BATCH_RESOURCE_STREAMER : 0));
intel_logical_ring_emit(ringbuf, lower_32_bits(offset));
intel_logical_ring_emit(ringbuf, upper_32_bits(offset));
intel_logical_ring_emit(ringbuf, MI_NOOP);
@ -2019,7 +2022,8 @@ populate_lr_context(struct intel_context *ctx, struct drm_i915_gem_object *ctx_o
reg_state[CTX_CONTEXT_CONTROL] = RING_CONTEXT_CONTROL(ring);
reg_state[CTX_CONTEXT_CONTROL+1] =
_MASKED_BIT_ENABLE(CTX_CTRL_INHIBIT_SYN_CTX_SWITCH |
CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT);
CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT |
CTX_CTRL_RS_CTX_ENABLE);
reg_state[CTX_RING_HEAD] = RING_HEAD(ring->mmio_base);
reg_state[CTX_RING_HEAD+1] = 0;
reg_state[CTX_RING_TAIL] = RING_TAIL(ring->mmio_base);

1
drivers/gpu/drm/i915/intel_lrc.h
View File

@ -32,6 +32,7 @@
#define RING_CONTEXT_CONTROL(ring) ((ring)->mmio_base+0x244)
#define CTX_CTRL_INHIBIT_SYN_CTX_SWITCH (1 << 3)
#define CTX_CTRL_ENGINE_CTX_RESTORE_INHIBIT (1 << 0)
#define CTX_CTRL_RS_CTX_ENABLE (1 << 1)
#define RING_CONTEXT_STATUS_BUF(ring) ((ring)->mmio_base+0x370)
#define RING_CONTEXT_STATUS_PTR(ring) ((ring)->mmio_base+0x3a0)