On Fri, Nov 20, 2015 at 12:43:43PM +0000, Chris Wilson wrote:
> Both perform the same actions with more or less indirection, so just
> unify the code.
> 
> Signed-off-by: Chris Wilson <[email protected]>
> ---
>  drivers/gpu/drm/i915/i915_gem.c            |   2 +-
>  drivers/gpu/drm/i915/i915_gem_context.c    |   8 +-
>  drivers/gpu/drm/i915/i915_gem_execbuffer.c |  34 ++++-----
>  drivers/gpu/drm/i915/i915_gem_gtt.c        |  26 +++----
>  drivers/gpu/drm/i915/intel_display.c       |  26 +++----
>  drivers/gpu/drm/i915/intel_lrc.c           | 118 
> ++++++++++++++---------------
>  drivers/gpu/drm/i915/intel_lrc.h           |  21 -----
>  drivers/gpu/drm/i915/intel_mocs.c          |  30 ++++----
>  drivers/gpu/drm/i915/intel_overlay.c       |  42 +++++-----
>  drivers/gpu/drm/i915/intel_ringbuffer.c    | 107 +++++++++++++-------------
>  drivers/gpu/drm/i915/intel_ringbuffer.h    |  15 +---
>  11 files changed, 195 insertions(+), 234 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
> index 5c3d11d020f0..c60105e36263 100644
> --- a/drivers/gpu/drm/i915/i915_gem.c
> +++ b/drivers/gpu/drm/i915/i915_gem.c
> @@ -4642,7 +4642,7 @@ err:
>  
>  int i915_gem_l3_remap(struct drm_i915_gem_request *req, int slice)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       struct drm_i915_private *dev_priv = req->i915;
>       u32 reg_base = GEN7_L3LOG_BASE + (slice * 0x200);
>       u32 *remap_info = dev_priv->l3_parity.remap_info[slice];
> diff --git a/drivers/gpu/drm/i915/i915_gem_context.c 
> b/drivers/gpu/drm/i915/i915_gem_context.c
> index 82a9f7197d32..c3adc121aab4 100644
> --- a/drivers/gpu/drm/i915/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/i915_gem_context.c
> @@ -479,7 +479,7 @@ i915_gem_context_get(struct drm_i915_file_private 
> *file_priv, u32 id)
>  static inline int
>  mi_set_context(struct drm_i915_gem_request *req, u32 hw_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       u32 flags = hw_flags | MI_MM_SPACE_GTT;
>       const int num_rings =
>               /* Use an extended w/a on ivb+ if signalling from other rings */
> @@ -494,7 +494,7 @@ mi_set_context(struct drm_i915_gem_request *req, u32 
> hw_flags)
>        * itlb_before_ctx_switch.
>        */
>       if (IS_GEN6(req->i915)) {
> -             ret = ring->flush(req, I915_GEM_GPU_DOMAINS, 0);
> +             ret = req->ring->flush(req, I915_GEM_GPU_DOMAINS, 0);
>               if (ret)
>                       return ret;
>       }
> @@ -522,7 +522,7 @@ mi_set_context(struct drm_i915_gem_request *req, u32 
> hw_flags)
>  
>                       intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(num_rings));
>                       for_each_ring(signaller, req->i915, i) {
> -                             if (signaller == ring)
> +                             if (signaller == req->ring)
>                                       continue;
>  
>                               intel_ring_emit(ring, 
> RING_PSMI_CTL(signaller->mmio_base));
> @@ -547,7 +547,7 @@ mi_set_context(struct drm_i915_gem_request *req, u32 
> hw_flags)
>  
>                       intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(num_rings));
>                       for_each_ring(signaller, req->i915, i) {
> -                             if (signaller == ring)
> +                             if (signaller == req->ring)
>                                       continue;

Tsk, unrelated hunks above. And maybe a cocci to s/req->ring/req->engine/.
At least mention in the commit message that your on a crusade against
superflous ring/dev/whatever pointers and arguments while in the area.

>                               intel_ring_emit(ring, 
> RING_PSMI_CTL(signaller->mmio_base));
> diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c 
> b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> index e8164b644e0e..5f1b9b7df051 100644
> --- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> +++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
> @@ -1113,14 +1113,12 @@ i915_gem_execbuffer_retire_commands(struct 
> i915_execbuffer_params *params)
>  }
>  
>  static int
> -i915_reset_gen7_sol_offsets(struct drm_device *dev,
> -                         struct drm_i915_gem_request *req)
> +i915_reset_gen7_sol_offsets(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     struct drm_i915_private *dev_priv = dev->dev_private;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret, i;
>  
> -     if (!IS_GEN7(dev) || ring != &dev_priv->ring[RCS]) {
> +     if (!IS_GEN7(req->i915) || req->ring->id != RCS) {
>               DRM_DEBUG("sol reset is gen7/rcs only\n");
>               return -EINVAL;
>       }
> @@ -1198,9 +1196,8 @@ i915_gem_ringbuffer_submission(struct 
> i915_execbuffer_params *params,
>                              struct drm_i915_gem_execbuffer2 *args,
>                              struct list_head *vmas)
>  {
> -     struct drm_device *dev = params->dev;
> -     struct intel_engine_cs *ring = params->ring;
> -     struct drm_i915_private *dev_priv = dev->dev_private;
> +     struct intel_ringbuffer *ring = params->request->ringbuf;
> +     struct drm_i915_private *dev_priv = params->request->i915;
>       u64 exec_start, exec_len;
>       int instp_mode;
>       u32 instp_mask;
> @@ -1214,34 +1211,31 @@ i915_gem_ringbuffer_submission(struct 
> i915_execbuffer_params *params,
>       if (ret)
>               return ret;
>  
> -     WARN(params->ctx->ppgtt && params->ctx->ppgtt->pd_dirty_rings & 
> (1<<ring->id),
> -          "%s didn't clear reload\n", ring->name);
> -
>       instp_mode = args->flags & I915_EXEC_CONSTANTS_MASK;
>       instp_mask = I915_EXEC_CONSTANTS_MASK;
>       switch (instp_mode) {
>       case I915_EXEC_CONSTANTS_REL_GENERAL:
>       case I915_EXEC_CONSTANTS_ABSOLUTE:
>       case I915_EXEC_CONSTANTS_REL_SURFACE:
> -             if (instp_mode != 0 && ring != &dev_priv->ring[RCS]) {
> +             if (instp_mode != 0 && params->ring->id != RCS) {
>                       DRM_DEBUG("non-0 rel constants mode on non-RCS\n");
>                       return -EINVAL;
>               }
>  
>               if (instp_mode != dev_priv->relative_constants_mode) {
> -                     if (INTEL_INFO(dev)->gen < 4) {
> +                     if (INTEL_INFO(dev_priv)->gen < 4) {
>                               DRM_DEBUG("no rel constants on pre-gen4\n");
>                               return -EINVAL;
>                       }
>  
> -                     if (INTEL_INFO(dev)->gen > 5 &&
> +                     if (INTEL_INFO(dev_priv)->gen > 5 &&
>                           instp_mode == I915_EXEC_CONSTANTS_REL_SURFACE) {
>                               DRM_DEBUG("rel surface constants mode invalid 
> on gen5+\n");
>                               return -EINVAL;
>                       }
>  
>                       /* The HW changed the meaning on this bit on gen6 */
> -                     if (INTEL_INFO(dev)->gen >= 6)
> +                     if (INTEL_INFO(dev_priv)->gen >= 6)
>                               instp_mask &= ~I915_EXEC_CONSTANTS_REL_SURFACE;
>               }
>               break;
> @@ -1250,7 +1244,7 @@ i915_gem_ringbuffer_submission(struct 
> i915_execbuffer_params *params,
>               return -EINVAL;
>       }
>  
> -     if (ring == &dev_priv->ring[RCS] &&
> +     if (params->ring->id == RCS &&
>           instp_mode != dev_priv->relative_constants_mode) {
>               ret = intel_ring_begin(params->request, 4);
>               if (ret)
> @@ -1266,7 +1260,7 @@ i915_gem_ringbuffer_submission(struct 
> i915_execbuffer_params *params,
>       }
>  
>       if (args->flags & I915_EXEC_GEN7_SOL_RESET) {
> -             ret = i915_reset_gen7_sol_offsets(dev, params->request);
> +             ret = i915_reset_gen7_sol_offsets(params->request);
>               if (ret)
>                       return ret;
>       }
> @@ -1275,9 +1269,9 @@ i915_gem_ringbuffer_submission(struct 
> i915_execbuffer_params *params,
>       exec_start = params->batch_obj_vm_offset +
>                    params->args_batch_start_offset;
>  
> -     ret = ring->dispatch_execbuffer(params->request,
> -                                     exec_start, exec_len,
> -                                     params->dispatch_flags);
> +     ret = params->ring->dispatch_execbuffer(params->request,
> +                                             exec_start, exec_len,
> +                                             params->dispatch_flags);

I guess we should just shovel all the stuff in params into request
eventually ...

>       if (ret)
>               return ret;
>  
> diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c 
> b/drivers/gpu/drm/i915/i915_gem_gtt.c
> index 7820e8983136..4608884adfc8 100644
> --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> @@ -651,7 +651,7 @@ static int gen8_write_pdp(struct drm_i915_gem_request 
> *req,
>                         unsigned entry,
>                         dma_addr_t addr)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       BUG_ON(entry >= 4);
> @@ -661,10 +661,10 @@ static int gen8_write_pdp(struct drm_i915_gem_request 
> *req,
>               return ret;
>  
>       intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
> -     intel_ring_emit(ring, GEN8_RING_PDP_UDW(ring, entry));
> +     intel_ring_emit(ring, GEN8_RING_PDP_UDW(req->ring, entry));
>       intel_ring_emit(ring, upper_32_bits(addr));
>       intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
> -     intel_ring_emit(ring, GEN8_RING_PDP_LDW(ring, entry));
> +     intel_ring_emit(ring, GEN8_RING_PDP_LDW(req->ring, entry));
>       intel_ring_emit(ring, lower_32_bits(addr));
>       intel_ring_advance(ring);
>  
> @@ -1588,11 +1588,11 @@ static uint32_t get_pd_offset(struct i915_hw_ppgtt 
> *ppgtt)
>  static int hsw_mm_switch(struct i915_hw_ppgtt *ppgtt,
>                        struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       /* NB: TLBs must be flushed and invalidated before a switch */
> -     ret = ring->flush(req, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
> +     ret = req->ring->flush(req, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
>       if (ret)
>               return ret;
>  
> @@ -1601,9 +1601,9 @@ static int hsw_mm_switch(struct i915_hw_ppgtt *ppgtt,
>               return ret;
>  
>       intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(2));
> -     intel_ring_emit(ring, RING_PP_DIR_DCLV(ring));
> +     intel_ring_emit(ring, RING_PP_DIR_DCLV(req->ring));
>       intel_ring_emit(ring, PP_DIR_DCLV_2G);
> -     intel_ring_emit(ring, RING_PP_DIR_BASE(ring));
> +     intel_ring_emit(ring, RING_PP_DIR_BASE(req->ring));
>       intel_ring_emit(ring, get_pd_offset(ppgtt));
>       intel_ring_emit(ring, MI_NOOP);
>       intel_ring_advance(ring);
> @@ -1625,11 +1625,11 @@ static int vgpu_mm_switch(struct i915_hw_ppgtt *ppgtt,
>  static int gen7_mm_switch(struct i915_hw_ppgtt *ppgtt,
>                         struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       /* NB: TLBs must be flushed and invalidated before a switch */
> -     ret = ring->flush(req, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
> +     ret = req->ring->flush(req, I915_GEM_GPU_DOMAINS, I915_GEM_GPU_DOMAINS);
>       if (ret)
>               return ret;
>  
> @@ -1638,16 +1638,16 @@ static int gen7_mm_switch(struct i915_hw_ppgtt *ppgtt,
>               return ret;
>  
>       intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(2));
> -     intel_ring_emit(ring, RING_PP_DIR_DCLV(ring));
> +     intel_ring_emit(ring, RING_PP_DIR_DCLV(req->ring));
>       intel_ring_emit(ring, PP_DIR_DCLV_2G);
> -     intel_ring_emit(ring, RING_PP_DIR_BASE(ring));
> +     intel_ring_emit(ring, RING_PP_DIR_BASE(req->ring));
>       intel_ring_emit(ring, get_pd_offset(ppgtt));
>       intel_ring_emit(ring, MI_NOOP);
>       intel_ring_advance(ring);
>  
>       /* XXX: RCS is the only one to auto invalidate the TLBs? */
> -     if (ring->id != RCS) {
> -             ret = ring->flush(req, I915_GEM_GPU_DOMAINS, 
> I915_GEM_GPU_DOMAINS);
> +     if (req->ring->id != RCS) {
> +             ret = req->ring->flush(req, I915_GEM_GPU_DOMAINS, 
> I915_GEM_GPU_DOMAINS);
>               if (ret)
>                       return ret;
>       }
> diff --git a/drivers/gpu/drm/i915/intel_display.c 
> b/drivers/gpu/drm/i915/intel_display.c
> index 6bd204980b70..f6dae2cfd9c9 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -10824,7 +10824,7 @@ static int intel_gen2_queue_flip(struct drm_device 
> *dev,
>                                struct drm_i915_gem_request *req,
>                                uint32_t flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>       u32 flip_mask;
>       int ret;
> @@ -10859,7 +10859,7 @@ static int intel_gen3_queue_flip(struct drm_device 
> *dev,
>                                struct drm_i915_gem_request *req,
>                                uint32_t flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>       u32 flip_mask;
>       int ret;
> @@ -10891,8 +10891,8 @@ static int intel_gen4_queue_flip(struct drm_device 
> *dev,
>                                struct drm_i915_gem_request *req,
>                                uint32_t flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     struct drm_i915_private *dev_priv = dev->dev_private;
> +     struct intel_ringbuffer *ring = req->ringbuf;
> +     struct drm_i915_private *dev_priv = req->i915;
>       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>       uint32_t pf, pipesrc;
>       int ret;
> @@ -10930,8 +10930,8 @@ static int intel_gen6_queue_flip(struct drm_device 
> *dev,
>                                struct drm_i915_gem_request *req,
>                                uint32_t flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     struct drm_i915_private *dev_priv = dev->dev_private;
> +     struct intel_ringbuffer *ring = req->ringbuf;
> +     struct drm_i915_private *dev_priv = req->i915;
>       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>       uint32_t pf, pipesrc;
>       int ret;
> @@ -10966,7 +10966,7 @@ static int intel_gen7_queue_flip(struct drm_device 
> *dev,
>                                struct drm_i915_gem_request *req,
>                                uint32_t flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>       uint32_t plane_bit = 0;
>       int len, ret;
> @@ -10987,14 +10987,14 @@ static int intel_gen7_queue_flip(struct drm_device 
> *dev,
>       }
>  
>       len = 4;
> -     if (ring->id == RCS) {
> +     if (req->ring->id == RCS) {
>               len += 6;
>               /*
>                * On Gen 8, SRM is now taking an extra dword to accommodate
>                * 48bits addresses, and we need a NOOP for the batch size to
>                * stay even.
>                */
> -             if (IS_GEN8(dev))
> +             if (IS_GEN8(req->i915))
>                       len += 2;
>       }
>  
> @@ -11025,21 +11025,21 @@ static int intel_gen7_queue_flip(struct drm_device 
> *dev,
>        * for the RCS also doesn't appear to drop events. Setting the DERRMR
>        * to zero does lead to lockups within MI_DISPLAY_FLIP.
>        */
> -     if (ring->id == RCS) {
> +     if (req->ring->id == RCS) {
>               intel_ring_emit(ring, MI_LOAD_REGISTER_IMM(1));
>               intel_ring_emit(ring, DERRMR);
>               intel_ring_emit(ring, ~(DERRMR_PIPEA_PRI_FLIP_DONE |
>                                       DERRMR_PIPEB_PRI_FLIP_DONE |
>                                       DERRMR_PIPEC_PRI_FLIP_DONE));
> -             if (IS_GEN8(dev))
> +             if (IS_GEN8(req->i915))
>                       intel_ring_emit(ring, MI_STORE_REGISTER_MEM_GEN8(1) |
>                                             MI_SRM_LRM_GLOBAL_GTT);
>               else
>                       intel_ring_emit(ring, MI_STORE_REGISTER_MEM(1) |
>                                             MI_SRM_LRM_GLOBAL_GTT);
>               intel_ring_emit(ring, DERRMR);
> -             intel_ring_emit(ring, ring->scratch.gtt_offset + 256);
> -             if (IS_GEN8(dev)) {
> +             intel_ring_emit(ring, req->ring->scratch.gtt_offset + 256);
> +             if (IS_GEN8(req->i915)) {
>                       intel_ring_emit(ring, 0);
>                       intel_ring_emit(ring, MI_NOOP);
>               }
> diff --git a/drivers/gpu/drm/i915/intel_lrc.c 
> b/drivers/gpu/drm/i915/intel_lrc.c
> index cfa77a59b352..0db23c474045 100644
> --- a/drivers/gpu/drm/i915/intel_lrc.c
> +++ b/drivers/gpu/drm/i915/intel_lrc.c
> @@ -700,11 +700,9 @@ static int logical_ring_wait_for_space(struct 
> drm_i915_gem_request *req,
>  static void
>  intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
>  {
> -     struct intel_engine_cs *ring = request->ring;
> -
> -     intel_logical_ring_advance(request->ringbuf);
> +     intel_ring_advance(request->ringbuf);
>  
> -     if (intel_ring_stopped(ring))
> +     if (intel_ring_stopped(request->ring))
>               return;
>  
>       execlists_context_queue(request);
> @@ -887,11 +885,11 @@ int intel_execlists_submission(struct 
> i915_execbuffer_params *params,
>               if (ret)
>                       return ret;
>  
> -             intel_logical_ring_emit(ringbuf, MI_NOOP);
> -             intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(1));
> -             intel_logical_ring_emit(ringbuf, INSTPM);
> -             intel_logical_ring_emit(ringbuf, instp_mask << 16 | instp_mode);
> -             intel_logical_ring_advance(ringbuf);
> +             intel_ring_emit(ringbuf, MI_NOOP);
> +             intel_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(1));
> +             intel_ring_emit(ringbuf, INSTPM);
> +             intel_ring_emit(ringbuf, instp_mask << 16 | instp_mode);
> +             intel_ring_advance(ringbuf);
>  
>               dev_priv->relative_constants_mode = instp_mode;
>       }
> @@ -1041,14 +1039,14 @@ static int intel_logical_ring_workarounds_emit(struct 
> drm_i915_gem_request *req)
>       if (ret)
>               return ret;
>  
> -     intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(w->count));
> +     intel_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(w->count));
>       for (i = 0; i < w->count; i++) {
> -             intel_logical_ring_emit(ringbuf, w->reg[i].addr);
> -             intel_logical_ring_emit(ringbuf, w->reg[i].value);
> +             intel_ring_emit(ringbuf, w->reg[i].addr);
> +             intel_ring_emit(ringbuf, w->reg[i].value);
>       }
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_emit(ringbuf, MI_NOOP);
>  
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_advance(ringbuf);
>  
>       ring->gpu_caches_dirty = true;
>       ret = logical_ring_flush_all_caches(req);
> @@ -1478,18 +1476,18 @@ static int intel_logical_ring_emit_pdps(struct 
> drm_i915_gem_request *req)
>       if (ret)
>               return ret;
>  
> -     intel_logical_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(num_lri_cmds));
> +     intel_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(num_lri_cmds));
>       for (i = GEN8_LEGACY_PDPES - 1; i >= 0; i--) {
>               const dma_addr_t pd_daddr = i915_page_dir_dma_addr(ppgtt, i);
>  
> -             intel_logical_ring_emit(ringbuf, GEN8_RING_PDP_UDW(ring, i));
> -             intel_logical_ring_emit(ringbuf, upper_32_bits(pd_daddr));
> -             intel_logical_ring_emit(ringbuf, GEN8_RING_PDP_LDW(ring, i));
> -             intel_logical_ring_emit(ringbuf, lower_32_bits(pd_daddr));
> +             intel_ring_emit(ringbuf, GEN8_RING_PDP_UDW(ring, i));
> +             intel_ring_emit(ringbuf, upper_32_bits(pd_daddr));
> +             intel_ring_emit(ringbuf, GEN8_RING_PDP_LDW(ring, i));
> +             intel_ring_emit(ringbuf, lower_32_bits(pd_daddr));
>       }
>  
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> @@ -1523,14 +1521,14 @@ 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) |
> -                             (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);
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, MI_BATCH_BUFFER_START_GEN8 |
> +                     (ppgtt<<8) |
> +                     (dispatch_flags & I915_DISPATCH_RS ?
> +                      MI_BATCH_RESOURCE_STREAMER : 0));
> +     intel_ring_emit(ringbuf, lower_32_bits(offset));
> +     intel_ring_emit(ringbuf, upper_32_bits(offset));
> +     intel_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> @@ -1598,13 +1596,13 @@ static int gen8_emit_flush(struct 
> drm_i915_gem_request *request,
>                       cmd |= MI_INVALIDATE_BSD;
>       }
>  
> -     intel_logical_ring_emit(ringbuf, cmd);
> -     intel_logical_ring_emit(ringbuf,
> -                             I915_GEM_HWS_SCRATCH_ADDR |
> -                             MI_FLUSH_DW_USE_GTT);
> -     intel_logical_ring_emit(ringbuf, 0); /* upper addr */
> -     intel_logical_ring_emit(ringbuf, 0); /* value */
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, cmd);
> +     intel_ring_emit(ringbuf,
> +                     I915_GEM_HWS_SCRATCH_ADDR |
> +                     MI_FLUSH_DW_USE_GTT);
> +     intel_ring_emit(ringbuf, 0); /* upper addr */
> +     intel_ring_emit(ringbuf, 0); /* value */
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> @@ -1651,21 +1649,21 @@ static int gen8_emit_flush_render(struct 
> drm_i915_gem_request *request,
>               return ret;
>  
>       if (vf_flush_wa) {
> -             intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
> -             intel_logical_ring_emit(ringbuf, 0);
> -             intel_logical_ring_emit(ringbuf, 0);
> -             intel_logical_ring_emit(ringbuf, 0);
> -             intel_logical_ring_emit(ringbuf, 0);
> -             intel_logical_ring_emit(ringbuf, 0);
> +             intel_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
> +             intel_ring_emit(ringbuf, 0);
> +             intel_ring_emit(ringbuf, 0);
> +             intel_ring_emit(ringbuf, 0);
> +             intel_ring_emit(ringbuf, 0);
> +             intel_ring_emit(ringbuf, 0);
>       }
>  
> -     intel_logical_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
> -     intel_logical_ring_emit(ringbuf, flags);
> -     intel_logical_ring_emit(ringbuf, scratch_addr);
> -     intel_logical_ring_emit(ringbuf, 0);
> -     intel_logical_ring_emit(ringbuf, 0);
> -     intel_logical_ring_emit(ringbuf, 0);
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, GFX_OP_PIPE_CONTROL(6));
> +     intel_ring_emit(ringbuf, flags);
> +     intel_ring_emit(ringbuf, scratch_addr);
> +     intel_ring_emit(ringbuf, 0);
> +     intel_ring_emit(ringbuf, 0);
> +     intel_ring_emit(ringbuf, 0);
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> @@ -1699,23 +1697,23 @@ static int gen8_emit_request(struct 
> drm_i915_gem_request *request)
>       cmd = MI_STORE_DWORD_IMM_GEN4;
>       cmd |= MI_GLOBAL_GTT;
>  
> -     intel_logical_ring_emit(ringbuf, cmd);
> -     intel_logical_ring_emit(ringbuf,
> -                             (ring->status_page.gfx_addr +
> -                             (I915_GEM_HWS_INDEX << 
> MI_STORE_DWORD_INDEX_SHIFT)));
> -     intel_logical_ring_emit(ringbuf, 0);
> -     intel_logical_ring_emit(ringbuf, i915_gem_request_get_seqno(request));
> -     intel_logical_ring_emit(ringbuf, MI_USER_INTERRUPT);
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_emit(ringbuf, cmd);
> +     intel_ring_emit(ringbuf,
> +                     (ring->status_page.gfx_addr +
> +                      (I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT)));
> +     intel_ring_emit(ringbuf, 0);
> +     intel_ring_emit(ringbuf, i915_gem_request_get_seqno(request));
> +     intel_ring_emit(ringbuf, MI_USER_INTERRUPT);
> +     intel_ring_emit(ringbuf, MI_NOOP);
>       intel_logical_ring_advance_and_submit(request);
>  
>       /*
>        * Here we add two extra NOOPs as padding to avoid
>        * lite restore of a context with HEAD==TAIL.
>        */
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> diff --git a/drivers/gpu/drm/i915/intel_lrc.h 
> b/drivers/gpu/drm/i915/intel_lrc.h
> index 8b56fb934763..861668919e5a 100644
> --- a/drivers/gpu/drm/i915/intel_lrc.h
> +++ b/drivers/gpu/drm/i915/intel_lrc.h
> @@ -45,27 +45,6 @@ int intel_logical_rings_init(struct drm_device *dev);
>  int intel_logical_ring_begin(struct drm_i915_gem_request *req, int 
> num_dwords);
>  
>  int logical_ring_flush_all_caches(struct drm_i915_gem_request *req);
> -/**
> - * intel_logical_ring_advance() - advance the ringbuffer tail
> - * @ringbuf: Ringbuffer to advance.
> - *
> - * The tail is only updated in our logical ringbuffer struct.
> - */
> -static inline void intel_logical_ring_advance(struct intel_ringbuffer 
> *ringbuf)
> -{
> -     intel_ringbuffer_advance(ringbuf);
> -}
> -
> -/**
> - * intel_logical_ring_emit() - write a DWORD to the ringbuffer.
> - * @ringbuf: Ringbuffer to write to.
> - * @data: DWORD to write.
> - */
> -static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
> -                                        u32 data)
> -{
> -     intel_ringbuffer_emit(ringbuf, data);
> -}
>  
>  /* Logical Ring Contexts */
>  void intel_lr_context_free(struct intel_context *ctx);
> diff --git a/drivers/gpu/drm/i915/intel_mocs.c 
> b/drivers/gpu/drm/i915/intel_mocs.c
> index 6d3c6c0a5c62..399a131a94b6 100644
> --- a/drivers/gpu/drm/i915/intel_mocs.c
> +++ b/drivers/gpu/drm/i915/intel_mocs.c
> @@ -187,13 +187,11 @@ static int emit_mocs_control_table(struct 
> drm_i915_gem_request *req,
>               return ret;
>       }
>  
> -     intel_logical_ring_emit(ringbuf,
> -                             MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES));
> +     intel_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES));
>  
>       for (index = 0; index < table->size; index++) {
> -             intel_logical_ring_emit(ringbuf, reg_base + index * 4);
> -             intel_logical_ring_emit(ringbuf,
> -                                     table->table[index].control_value);
> +             intel_ring_emit(ringbuf, reg_base + index * 4);
> +             intel_ring_emit(ringbuf, table->table[index].control_value);
>       }
>  
>       /*
> @@ -205,12 +203,12 @@ static int emit_mocs_control_table(struct 
> drm_i915_gem_request *req,
>        * that value to all the used entries.
>        */
>       for (; index < GEN9_NUM_MOCS_ENTRIES; index++) {
> -             intel_logical_ring_emit(ringbuf, reg_base + index * 4);
> -             intel_logical_ring_emit(ringbuf, table->table[0].control_value);
> +             intel_ring_emit(ringbuf, reg_base + index * 4);
> +             intel_ring_emit(ringbuf, table->table[0].control_value);
>       }
>  
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> @@ -246,15 +244,15 @@ static int emit_mocs_l3cc_table(struct 
> drm_i915_gem_request *req,
>               return ret;
>       }
>  
> -     intel_logical_ring_emit(ringbuf,
> +     intel_ring_emit(ringbuf,
>                       MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES / 2));
>  
>       for (i = 0, count = 0; i < table->size / 2; i++, count += 2) {
>               value = (table->table[count].l3cc_value & 0xffff) |
>                       ((table->table[count + 1].l3cc_value & 0xffff) << 16);
>  
> -             intel_logical_ring_emit(ringbuf, GEN9_LNCFCMOCS0 + i * 4);
> -             intel_logical_ring_emit(ringbuf, value);
> +             intel_ring_emit(ringbuf, GEN9_LNCFCMOCS0 + i * 4);
> +             intel_ring_emit(ringbuf, value);
>       }
>  
>       if (table->size & 0x01) {
> @@ -270,14 +268,14 @@ static int emit_mocs_l3cc_table(struct 
> drm_i915_gem_request *req,
>        * they are reserved by the hardware.
>        */
>       for (; i < GEN9_NUM_MOCS_ENTRIES / 2; i++) {
> -             intel_logical_ring_emit(ringbuf, GEN9_LNCFCMOCS0 + i * 4);
> -             intel_logical_ring_emit(ringbuf, value);
> +             intel_ring_emit(ringbuf, GEN9_LNCFCMOCS0 + i * 4);
> +             intel_ring_emit(ringbuf, value);
>  
>               value = filler;
>       }
>  
> -     intel_logical_ring_emit(ringbuf, MI_NOOP);
> -     intel_logical_ring_advance(ringbuf);
> +     intel_ring_emit(ringbuf, MI_NOOP);
> +     intel_ring_advance(ringbuf);
>  
>       return 0;
>  }
> diff --git a/drivers/gpu/drm/i915/intel_overlay.c 
> b/drivers/gpu/drm/i915/intel_overlay.c
> index 444542696a2c..5e9c7c15a84b 100644
> --- a/drivers/gpu/drm/i915/intel_overlay.c
> +++ b/drivers/gpu/drm/i915/intel_overlay.c
> @@ -252,11 +252,11 @@ static int intel_overlay_on(struct intel_overlay 
> *overlay)
>  
>       overlay->active = true;
>  
> -     intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_ON);
> -     intel_ring_emit(ring, overlay->flip_addr | OFC_UPDATE);
> -     intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
> -     intel_ring_emit(ring, MI_NOOP);
> -     intel_ring_advance(ring);
> +     intel_ring_emit(req->ringbuf, MI_OVERLAY_FLIP | MI_OVERLAY_ON);
> +     intel_ring_emit(req->ringbuf, overlay->flip_addr | OFC_UPDATE);
> +     intel_ring_emit(req->ringbuf, MI_WAIT_FOR_EVENT | 
> MI_WAIT_FOR_OVERLAY_FLIP);
> +     intel_ring_emit(req->ringbuf, MI_NOOP);
> +     intel_ring_advance(req->ringbuf);
>  
>       return intel_overlay_do_wait_request(overlay, req, NULL);
>  }
> @@ -293,9 +293,9 @@ static int intel_overlay_continue(struct intel_overlay 
> *overlay,
>               return ret;
>       }
>  
> -     intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
> -     intel_ring_emit(ring, flip_addr);
> -     intel_ring_advance(ring);
> +     intel_ring_emit(req->ringbuf, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
> +     intel_ring_emit(req->ringbuf, flip_addr);
> +     intel_ring_advance(req->ringbuf);
>  
>       WARN_ON(overlay->last_flip_req);
>       i915_gem_request_assign(&overlay->last_flip_req, req);
> @@ -360,22 +360,22 @@ static int intel_overlay_off(struct intel_overlay 
> *overlay)
>       }
>  
>       /* wait for overlay to go idle */
> -     intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
> -     intel_ring_emit(ring, flip_addr);
> -     intel_ring_emit(ring, MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
> +     intel_ring_emit(req->ringbuf, MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
> +     intel_ring_emit(req->ringbuf, flip_addr);
> +     intel_ring_emit(req->ringbuf, MI_WAIT_FOR_EVENT | 
> MI_WAIT_FOR_OVERLAY_FLIP);
>       /* turn overlay off */
>       if (IS_I830(dev)) {
>               /* Workaround: Don't disable the overlay fully, since otherwise
>                * it dies on the next OVERLAY_ON cmd. */
> -             intel_ring_emit(ring, MI_NOOP);
> -             intel_ring_emit(ring, MI_NOOP);
> -             intel_ring_emit(ring, MI_NOOP);
> +             intel_ring_emit(req->ringbuf, MI_NOOP);
> +             intel_ring_emit(req->ringbuf, MI_NOOP);
> +             intel_ring_emit(req->ringbuf, MI_NOOP);
>       } else {
> -             intel_ring_emit(ring, MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
> -             intel_ring_emit(ring, flip_addr);
> -             intel_ring_emit(ring, MI_WAIT_FOR_EVENT | 
> MI_WAIT_FOR_OVERLAY_FLIP);
> +             intel_ring_emit(req->ringbuf, MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
> +             intel_ring_emit(req->ringbuf, flip_addr);
> +             intel_ring_emit(req->ringbuf, MI_WAIT_FOR_EVENT | 
> MI_WAIT_FOR_OVERLAY_FLIP);
>       }
> -     intel_ring_advance(ring);
> +     intel_ring_advance(req->ringbuf);
>  
>       return intel_overlay_do_wait_request(overlay, req, 
> intel_overlay_off_tail);
>  }
> @@ -433,9 +433,9 @@ static int intel_overlay_release_old_vid(struct 
> intel_overlay *overlay)
>                       return ret;
>               }
>  
> -             intel_ring_emit(ring, MI_WAIT_FOR_EVENT | 
> MI_WAIT_FOR_OVERLAY_FLIP);
> -             intel_ring_emit(ring, MI_NOOP);
> -             intel_ring_advance(ring);
> +             intel_ring_emit(req->ringbuf, MI_WAIT_FOR_EVENT | 
> MI_WAIT_FOR_OVERLAY_FLIP);
> +             intel_ring_emit(req->ringbuf, MI_NOOP);
> +             intel_ring_advance(req->ringbuf);
>  
>               ret = intel_overlay_do_wait_request(overlay, req,
>                                                   
> intel_overlay_release_old_vid_tail);

Any reason for not doing your usual transform to intel_ringbuffer for the
local ring here in the overlay code? Or does that happen when
intel_ring_begin falls?

> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c 
> b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index 9fbe730aae47..b3de8b1fde2f 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -95,7 +95,7 @@ gen2_render_ring_flush(struct drm_i915_gem_request *req,
>                      u32      invalidate_domains,
>                      u32      flush_domains)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       u32 cmd;
>       int ret;
>  
> @@ -122,7 +122,7 @@ gen4_render_ring_flush(struct drm_i915_gem_request *req,
>                      u32      invalidate_domains,
>                      u32      flush_domains)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       u32 cmd;
>       int ret;
>  
> @@ -215,8 +215,8 @@ gen4_render_ring_flush(struct drm_i915_gem_request *req,
>  static int
>  intel_emit_post_sync_nonzero_flush(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
> +     struct intel_ringbuffer *ring = req->ringbuf;
> +     u32 scratch_addr = req->ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
>       int ret;
>  
>       ret = intel_ring_begin(req, 6);
> @@ -251,9 +251,9 @@ static int
>  gen6_render_ring_flush(struct drm_i915_gem_request *req,
>                      u32 invalidate_domains, u32 flush_domains)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       u32 flags = 0;
> -     u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
> +     u32 scratch_addr = req->ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
>       int ret;
>  
>       /* Force SNB workarounds for PIPE_CONTROL flushes */
> @@ -303,7 +303,7 @@ gen6_render_ring_flush(struct drm_i915_gem_request *req,
>  static int
>  gen7_render_ring_cs_stall_wa(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 4);
> @@ -324,9 +324,9 @@ static int
>  gen7_render_ring_flush(struct drm_i915_gem_request *req,
>                      u32 invalidate_domains, u32 flush_domains)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       u32 flags = 0;
> -     u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
> +     u32 scratch_addr = req->ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
>       int ret;
>  
>       /*
> @@ -387,7 +387,7 @@ static int
>  gen8_emit_pipe_control(struct drm_i915_gem_request *req,
>                      u32 flags, u32 scratch_addr)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 6);
> @@ -712,15 +712,15 @@ err:
>  
>  static int intel_ring_workarounds_emit(struct drm_i915_gem_request *req)
>  {
> -     int ret, i;
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       struct drm_i915_private *dev_priv = req->i915;
>       struct i915_workarounds *w = &dev_priv->workarounds;
> +     int ret, i;
>  
>       if (WARN_ON_ONCE(w->count == 0))
>               return 0;
>  
> -     ring->gpu_caches_dirty = true;
> +     req->ring->gpu_caches_dirty = true;
>       ret = intel_ring_flush_all_caches(req);
>       if (ret)
>               return ret;
> @@ -738,7 +738,7 @@ static int intel_ring_workarounds_emit(struct 
> drm_i915_gem_request *req)
>  
>       intel_ring_advance(ring);
>  
> -     ring->gpu_caches_dirty = true;
> +     req->ring->gpu_caches_dirty = true;
>       ret = intel_ring_flush_all_caches(req);
>       if (ret)
>               return ret;
> @@ -1184,7 +1184,7 @@ static int gen8_rcs_signal(struct drm_i915_gem_request 
> *signaller_req,
>                          unsigned int num_dwords)
>  {
>  #define MBOX_UPDATE_DWORDS 8
> -     struct intel_engine_cs *signaller = signaller_req->ring;
> +     struct intel_ringbuffer *signaller = signaller_req->ringbuf;
>       struct drm_i915_private *dev_priv = signaller_req->i915;
>       struct intel_engine_cs *waiter;
>       int i, ret, num_rings;
> @@ -1199,7 +1199,7 @@ static int gen8_rcs_signal(struct drm_i915_gem_request 
> *signaller_req,
>  
>       for_each_ring(waiter, dev_priv, i) {
>               u32 seqno;
> -             u64 gtt_offset = signaller->semaphore.signal_ggtt[i];
> +             u64 gtt_offset = signaller_req->ring->semaphore.signal_ggtt[i];
>               if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
>                       continue;
>  
> @@ -1224,7 +1224,7 @@ static int gen8_xcs_signal(struct drm_i915_gem_request 
> *signaller_req,
>                          unsigned int num_dwords)
>  {
>  #define MBOX_UPDATE_DWORDS 6
> -     struct intel_engine_cs *signaller = signaller_req->ring;
> +     struct intel_ringbuffer *signaller = signaller_req->ringbuf;
>       struct drm_i915_private *dev_priv = signaller_req->i915;
>       struct intel_engine_cs *waiter;
>       int i, ret, num_rings;
> @@ -1239,7 +1239,7 @@ static int gen8_xcs_signal(struct drm_i915_gem_request 
> *signaller_req,
>  
>       for_each_ring(waiter, dev_priv, i) {
>               u32 seqno;
> -             u64 gtt_offset = signaller->semaphore.signal_ggtt[i];
> +             u64 gtt_offset = signaller_req->ring->semaphore.signal_ggtt[i];
>               if (gtt_offset == MI_SEMAPHORE_SYNC_INVALID)
>                       continue;
>  
> @@ -1261,7 +1261,7 @@ static int gen8_xcs_signal(struct drm_i915_gem_request 
> *signaller_req,
>  static int gen6_signal(struct drm_i915_gem_request *signaller_req,
>                      unsigned int num_dwords)
>  {
> -     struct intel_engine_cs *signaller = signaller_req->ring;
> +     struct intel_ringbuffer *signaller = signaller_req->ringbuf;
>       struct drm_i915_private *dev_priv = signaller_req->i915;
>       struct intel_engine_cs *useless;
>       int i, ret, num_rings;
> @@ -1276,7 +1276,7 @@ static int gen6_signal(struct drm_i915_gem_request 
> *signaller_req,
>               return ret;
>  
>       for_each_ring(useless, dev_priv, i) {
> -             u32 mbox_reg = signaller->semaphore.mbox.signal[i];
> +             u32 mbox_reg = signaller_req->ring->semaphore.mbox.signal[i];
>               if (mbox_reg != GEN6_NOSYNC) {
>                       u32 seqno = i915_gem_request_get_seqno(signaller_req);
>                       intel_ring_emit(signaller, MI_LOAD_REGISTER_IMM(1));
> @@ -1303,11 +1303,11 @@ static int gen6_signal(struct drm_i915_gem_request 
> *signaller_req,
>  static int
>  gen6_add_request(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
> -     if (ring->semaphore.signal)
> -             ret = ring->semaphore.signal(req, 4);
> +     if (req->ring->semaphore.signal)
> +             ret = req->ring->semaphore.signal(req, 4);
>       else
>               ret = intel_ring_begin(req, 4);
>  
> @@ -1318,15 +1318,14 @@ gen6_add_request(struct drm_i915_gem_request *req)
>       intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
>       intel_ring_emit(ring, i915_gem_request_get_seqno(req));
>       intel_ring_emit(ring, MI_USER_INTERRUPT);
> -     __intel_ring_advance(ring);
> +     __intel_ring_advance(req->ring);
>  
>       return 0;
>  }
>  
> -static inline bool i915_gem_has_seqno_wrapped(struct drm_device *dev,
> +static inline bool i915_gem_has_seqno_wrapped(struct drm_i915_private 
> *dev_priv,
>                                             u32 seqno)
>  {
> -     struct drm_i915_private *dev_priv = dev->dev_private;
>       return dev_priv->last_seqno < seqno;
>  }
>  
> @@ -1343,7 +1342,7 @@ gen8_ring_sync(struct drm_i915_gem_request *waiter_req,
>              struct intel_engine_cs *signaller,
>              u32 seqno)
>  {
> -     struct intel_engine_cs *waiter = waiter_req->ring;
> +     struct intel_ringbuffer *waiter = waiter_req->ringbuf;
>       struct drm_i915_private *dev_priv = waiter_req->i915;
>       int ret;
>  
> @@ -1357,9 +1356,11 @@ gen8_ring_sync(struct drm_i915_gem_request *waiter_req,
>                               MI_SEMAPHORE_SAD_GTE_SDD);
>       intel_ring_emit(waiter, seqno);
>       intel_ring_emit(waiter,
> -                     lower_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id)));
> +                     lower_32_bits(GEN8_WAIT_OFFSET(waiter_req->ring,
> +                                                    signaller->id)));
>       intel_ring_emit(waiter,
> -                     upper_32_bits(GEN8_WAIT_OFFSET(waiter, signaller->id)));
> +                     upper_32_bits(GEN8_WAIT_OFFSET(waiter_req->ring,
> +                                                    signaller->id)));
>       intel_ring_advance(waiter);
>       return 0;
>  }
> @@ -1369,11 +1370,11 @@ gen6_ring_sync(struct drm_i915_gem_request 
> *waiter_req,
>              struct intel_engine_cs *signaller,
>              u32 seqno)
>  {
> -     struct intel_engine_cs *waiter = waiter_req->ring;
> +     struct intel_ringbuffer *waiter = waiter_req->ringbuf;
>       u32 dw1 = MI_SEMAPHORE_MBOX |
>                 MI_SEMAPHORE_COMPARE |
>                 MI_SEMAPHORE_REGISTER;
> -     u32 wait_mbox = signaller->semaphore.mbox.wait[waiter->id];
> +     u32 wait_mbox = signaller->semaphore.mbox.wait[waiter_req->ring->id];
>       int ret;
>  
>       /* Throughout all of the GEM code, seqno passed implies our current
> @@ -1389,7 +1390,7 @@ gen6_ring_sync(struct drm_i915_gem_request *waiter_req,
>               return ret;
>  
>       /* If seqno wrap happened, omit the wait with no-ops */
> -     if (likely(!i915_gem_has_seqno_wrapped(waiter->dev, seqno))) {
> +     if (likely(!i915_gem_has_seqno_wrapped(waiter_req->i915, seqno))) {
>               intel_ring_emit(waiter, dw1 | wait_mbox);
>               intel_ring_emit(waiter, seqno);
>               intel_ring_emit(waiter, 0);
> @@ -1417,8 +1418,8 @@ do {                                                    
>                 \
>  static int
>  pc_render_add_request(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     u32 scratch_addr = ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
> +     struct intel_ringbuffer *ring = req->ringbuf;
> +     u32 scratch_addr = req->ring->scratch.gtt_offset + 2 * CACHELINE_BYTES;
>       int ret;
>  
>       /* For Ironlake, MI_USER_INTERRUPT was deprecated and apparently
> @@ -1436,7 +1437,7 @@ pc_render_add_request(struct drm_i915_gem_request *req)
>       intel_ring_emit(ring, GFX_OP_PIPE_CONTROL(4) | PIPE_CONTROL_QW_WRITE |
>                       PIPE_CONTROL_WRITE_FLUSH |
>                       PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE);
> -     intel_ring_emit(ring, ring->scratch.gtt_offset | 
> PIPE_CONTROL_GLOBAL_GTT);
> +     intel_ring_emit(ring, req->ring->scratch.gtt_offset | 
> PIPE_CONTROL_GLOBAL_GTT);
>       intel_ring_emit(ring, i915_gem_request_get_seqno(req));
>       intel_ring_emit(ring, 0);
>       PIPE_CONTROL_FLUSH(ring, scratch_addr);
> @@ -1455,10 +1456,10 @@ pc_render_add_request(struct drm_i915_gem_request 
> *req)
>                       PIPE_CONTROL_WRITE_FLUSH |
>                       PIPE_CONTROL_TEXTURE_CACHE_INVALIDATE |
>                       PIPE_CONTROL_NOTIFY);
> -     intel_ring_emit(ring, ring->scratch.gtt_offset | 
> PIPE_CONTROL_GLOBAL_GTT);
> +     intel_ring_emit(ring, req->ring->scratch.gtt_offset | 
> PIPE_CONTROL_GLOBAL_GTT);
>       intel_ring_emit(ring, i915_gem_request_get_seqno(req));
>       intel_ring_emit(ring, 0);
> -     __intel_ring_advance(ring);
> +     __intel_ring_advance(req->ring);
>  
>       return 0;
>  }
> @@ -1611,7 +1612,7 @@ bsd_ring_flush(struct drm_i915_gem_request *req,
>              u32     invalidate_domains,
>              u32     flush_domains)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 2);
> @@ -1627,7 +1628,7 @@ bsd_ring_flush(struct drm_i915_gem_request *req,
>  static int
>  i9xx_add_request(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 4);
> @@ -1638,7 +1639,7 @@ i9xx_add_request(struct drm_i915_gem_request *req)
>       intel_ring_emit(ring, I915_GEM_HWS_INDEX << MI_STORE_DWORD_INDEX_SHIFT);
>       intel_ring_emit(ring, i915_gem_request_get_seqno(req));
>       intel_ring_emit(ring, MI_USER_INTERRUPT);
> -     __intel_ring_advance(ring);
> +     __intel_ring_advance(req->ring);
>  
>       return 0;
>  }
> @@ -1772,7 +1773,7 @@ i965_dispatch_execbuffer(struct drm_i915_gem_request 
> *req,
>                        u64 offset, u32 length,
>                        unsigned dispatch_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 2);
> @@ -1799,8 +1800,8 @@ i830_dispatch_execbuffer(struct drm_i915_gem_request 
> *req,
>                        u64 offset, u32 len,
>                        unsigned dispatch_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     u32 cs_offset = ring->scratch.gtt_offset;
> +     struct intel_ringbuffer *ring = req->ringbuf;
> +     u32 cs_offset = req->ring->scratch.gtt_offset;
>       int ret;
>  
>       ret = intel_ring_begin(req, 6);
> @@ -1862,7 +1863,7 @@ i915_dispatch_execbuffer(struct drm_i915_gem_request 
> *req,
>                        u64 offset, u32 len,
>                        unsigned dispatch_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 2);
> @@ -2343,8 +2344,8 @@ int intel_ring_begin(struct drm_i915_gem_request *req,
>  /* Align the ring tail to a cacheline boundary */
>  int intel_ring_cacheline_align(struct drm_i915_gem_request *req)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> -     int num_dwords = (ring->buffer->tail & (CACHELINE_BYTES - 1)) / 
> sizeof(uint32_t);
> +     struct intel_ringbuffer *ring = req->ringbuf;
> +     int num_dwords = (ring->tail & (CACHELINE_BYTES - 1)) / 
> sizeof(uint32_t);
>       int ret;
>  
>       if (num_dwords == 0)
> @@ -2415,7 +2416,7 @@ static void gen6_bsd_ring_write_tail(struct 
> intel_engine_cs *ring,
>  static int gen6_bsd_ring_flush(struct drm_i915_gem_request *req,
>                              u32 invalidate, u32 flush)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       uint32_t cmd;
>       int ret;
>  
> @@ -2424,7 +2425,7 @@ static int gen6_bsd_ring_flush(struct 
> drm_i915_gem_request *req,
>               return ret;
>  
>       cmd = MI_FLUSH_DW;
> -     if (INTEL_INFO(ring->dev)->gen >= 8)
> +     if (INTEL_INFO(req->i915)->gen >= 8)
>               cmd += 1;
>  
>       /* We always require a command barrier so that subsequent
> @@ -2445,7 +2446,7 @@ static int gen6_bsd_ring_flush(struct 
> drm_i915_gem_request *req,
>  
>       intel_ring_emit(ring, cmd);
>       intel_ring_emit(ring, I915_GEM_HWS_SCRATCH_ADDR | MI_FLUSH_DW_USE_GTT);
> -     if (INTEL_INFO(ring->dev)->gen >= 8) {
> +     if (INTEL_INFO(req->i915)->gen >= 8) {
>               intel_ring_emit(ring, 0); /* upper addr */
>               intel_ring_emit(ring, 0); /* value */
>       } else  {
> @@ -2461,7 +2462,7 @@ gen8_ring_dispatch_execbuffer(struct 
> drm_i915_gem_request *req,
>                             u64 offset, u32 len,
>                             unsigned dispatch_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       bool ppgtt = USES_PPGTT(req->i915) &&
>                       !(dispatch_flags & I915_DISPATCH_SECURE);
>       int ret;
> @@ -2487,7 +2488,7 @@ hsw_ring_dispatch_execbuffer(struct 
> drm_i915_gem_request *req,
>                            u64 offset, u32 len,
>                            unsigned dispatch_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 2);
> @@ -2512,7 +2513,7 @@ gen6_ring_dispatch_execbuffer(struct 
> drm_i915_gem_request *req,
>                             u64 offset, u32 len,
>                             unsigned dispatch_flags)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       int ret;
>  
>       ret = intel_ring_begin(req, 2);
> @@ -2535,7 +2536,7 @@ gen6_ring_dispatch_execbuffer(struct 
> drm_i915_gem_request *req,
>  static int gen6_ring_flush(struct drm_i915_gem_request *req,
>                          u32 invalidate, u32 flush)
>  {
> -     struct intel_engine_cs *ring = req->ring;
> +     struct intel_ringbuffer *ring = req->ringbuf;
>       uint32_t cmd;
>       int ret;
>  
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h 
> b/drivers/gpu/drm/i915/intel_ringbuffer.h
> index 10f80df5f121..212b402818f9 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.h
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
> @@ -427,25 +427,16 @@ int intel_ring_alloc_request_extras(struct 
> drm_i915_gem_request *request);
>  
>  int __must_check intel_ring_begin(struct drm_i915_gem_request *req, int n);
>  int __must_check intel_ring_cacheline_align(struct drm_i915_gem_request 
> *req);
> -static inline void intel_ringbuffer_emit(struct intel_ringbuffer *rb,
> -                                      u32 data)
> +static inline void intel_ring_emit(struct intel_ringbuffer *rb,
> +                                u32 data)
>  {
>       *(uint32_t *)(rb->virtual_start + rb->tail) = data;
>       rb->tail += 4;
>  }
> -static inline void intel_ringbuffer_advance(struct intel_ringbuffer *rb)
> +static inline void intel_ring_advance(struct intel_ringbuffer *rb)
>  {
>       rb->tail &= rb->size - 1;
>  }
> -static inline void intel_ring_emit(struct intel_engine_cs *ring,
> -                                u32 data)
> -{
> -     intel_ringbuffer_emit(ring->buffer, data);
> -}
> -static inline void intel_ring_advance(struct intel_engine_cs *ring)
> -{
> -     intel_ringbuffer_advance(ring->buffer);
> -}
>  int __intel_ring_space(int head, int tail, int size);
>  void intel_ring_update_space(struct intel_ringbuffer *ringbuf);
>  int intel_ring_space(struct intel_ringbuffer *ringbuf);

At the end of this crusade we should add some pretty kerneldoc for our
ringbuffer interface.

Anyway, with some notes about your dev_priv/ringbuffer/whatver crusade
added to the commit message, just to align and clarify the new naming
convention:

Reviewed-by: Daniel Vetter <[email protected]>
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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