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drm/i915/guc: Introduce buffer based cmd transport

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Buffer based command transport can replace MMIO based mechanism.
It may be used to perform host-2-guc and guc-to-host communication.

Portions of this patch are based on work by:
 Michel Thierry <michel.thierry@intel.com>
 Robert Beckett <robert.beckett@intel.com>
 Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>

v2: use gem_object_pin_map (Chris)
    don't use DEBUG_RATELIMITED (Chris)
    don't track action stats (Chris)
    simplify next fence (Chris)
    use READ_ONCE (Chris)
    move blob allocation to new function (Chris)

v3: use static owner id (Daniele)
v4: but keep channel initialization generic (Daniele)
    and introduce owner_sub_id (Daniele)

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170526111326.87280-3-michal.wajdeczko@intel.com
This commit is contained in:
Michal Wajdeczko
2017-05-26 11:13:25 +00:00
committed by Chris Wilson
parent 2f64085a75
commit f8a58d639d
7 changed files with 613 additions and 2 deletions
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3
drivers/gpu/drm/i915/intel_uc.h
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@@ -27,7 +27,7 @@
#include "intel_guc_fwif.h"
#include "i915_guc_reg.h"
#include "intel_ringbuffer.h"
#include "intel_guc_ct.h"
#include "i915_vma.h"
struct drm_i915_gem_request;
@@ -173,6 +173,7 @@ struct intel_guc_log {
struct intel_guc {
struct intel_uc_fw fw;
struct intel_guc_log log;
struct intel_guc_ct ct;
/* intel_guc_recv interrupt related state */
bool interrupts_enabled;