/*
 * Copyright © 2018 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

/**
 * @file iris_blorp.c
 *
 * ============================= GENXML CODE =============================
 *              [This file is compiled once per generation.]
 * =======================================================================
 *
 * GenX specific code for working with BLORP (blitting, resolves, clears
 * on the 3D engine).  This provides the driver-specific hooks needed to
 * implement the BLORP API.
 *
 * See iris_blit.c, iris_clear.c, and so on.
 */

#include <assert.h>

#include "iris_batch.h"
#include "iris_resource.h"
#include "iris_context.h"

#include "util/u_upload_mgr.h"
#include "intel/common/gen_l3_config.h"

#define BLORP_USE_SOFTPIN
#include "blorp/blorp_genX_exec.h"

#if GEN_GEN == 8
#define MOCS_WB 0x78
#else
#define MOCS_WB (2 << 1)
#endif

static uint32_t *
stream_state(struct iris_batch *batch,
             struct u_upload_mgr *uploader,
             unsigned size,
             unsigned alignment,
             uint32_t *out_offset,
             struct iris_bo **out_bo)
{
   struct pipe_resource *res = NULL;
   void *ptr = NULL;

   u_upload_alloc(uploader, 0, size, alignment, out_offset, &res, &ptr);

   struct iris_bo *bo = iris_resource_bo(res);
   iris_use_pinned_bo(batch, bo, false);

   iris_record_state_size(batch->state_sizes,
                          bo->gtt_offset + *out_offset, size);

   /* If the caller has asked for a BO, we leave them the responsibility of
    * adding bo->gtt_offset (say, by handing an address to genxml).  If not,
    * we assume they want the offset from a base address.
    */
   if (out_bo)
      *out_bo = bo;
   else
      *out_offset += iris_bo_offset_from_base_address(bo);

   pipe_resource_reference(&res, NULL);

   return ptr;
}

static void *
blorp_emit_dwords(struct blorp_batch *blorp_batch, unsigned n)
{
   struct iris_batch *batch = blorp_batch->driver_batch;
   return iris_get_command_space(batch, n * sizeof(uint32_t));
}

static uint64_t
combine_and_pin_address(struct blorp_batch *blorp_batch,
                        struct blorp_address addr)
{
   struct iris_batch *batch = blorp_batch->driver_batch;
   struct iris_bo *bo = addr.buffer;

   iris_use_pinned_bo(batch, bo, addr.reloc_flags & RELOC_WRITE);

   /* Assume this is a general address, not relative to a base. */
   return bo->gtt_offset + addr.offset;
}

static uint64_t
blorp_emit_reloc(struct blorp_batch *blorp_batch, UNUSED void *location,
                 struct blorp_address addr, uint32_t delta)
{
   return combine_and_pin_address(blorp_batch, addr) + delta;
}

static void
blorp_surface_reloc(struct blorp_batch *blorp_batch, uint32_t ss_offset,
                    struct blorp_address addr, uint32_t delta)
{
   /* Let blorp_get_surface_address do the pinning. */
}

static uint64_t
blorp_get_surface_address(struct blorp_batch *blorp_batch,
                          struct blorp_address addr)
{
   return combine_and_pin_address(blorp_batch, addr);
}

UNUSED static struct blorp_address
blorp_get_surface_base_address(UNUSED struct blorp_batch *blorp_batch)
{
   return (struct blorp_address) { .offset = IRIS_MEMZONE_BINDER_START };
}

static void *
blorp_alloc_dynamic_state(struct blorp_batch *blorp_batch,
                          uint32_t size,
                          uint32_t alignment,
                          uint32_t *offset)
{
   struct iris_context *ice = blorp_batch->blorp->driver_ctx;
   struct iris_batch *batch = blorp_batch->driver_batch;

   return stream_state(batch, ice->state.dynamic_uploader,
                       size, alignment, offset, NULL);
}

static void
blorp_alloc_binding_table(struct blorp_batch *blorp_batch,
                          unsigned num_entries,
                          unsigned state_size,
                          unsigned state_alignment,
                          uint32_t *bt_offset,
                          uint32_t *surface_offsets,
                          void **surface_maps)
{
   struct iris_context *ice = blorp_batch->blorp->driver_ctx;
   struct iris_binder *binder = &ice->state.binder;
   struct iris_batch *batch = blorp_batch->driver_batch;

   *bt_offset = iris_binder_reserve(ice, num_entries * sizeof(uint32_t));
   uint32_t *bt_map = binder->map + *bt_offset;

   for (unsigned i = 0; i < num_entries; i++) {
      surface_maps[i] = stream_state(batch, ice->state.surface_uploader,
                                     state_size, state_alignment,
                                     &surface_offsets[i], NULL);
      bt_map[i] = surface_offsets[i] - (uint32_t) binder->bo->gtt_offset;
   }

   iris_use_pinned_bo(batch, binder->bo, false);

   ice->vtbl.update_surface_base_address(batch, binder);
}

static void *
blorp_alloc_vertex_buffer(struct blorp_batch *blorp_batch,
                          uint32_t size,
                          struct blorp_address *addr)
{
   struct iris_context *ice = blorp_batch->blorp->driver_ctx;
   struct iris_batch *batch = blorp_batch->driver_batch;
   struct iris_bo *bo;
   uint32_t offset;

   void *map = stream_state(batch, ice->ctx.stream_uploader, size, 64,
                            &offset, &bo);

   *addr = (struct blorp_address) {
      .buffer = bo,
      .offset = offset,
      .mocs = MOCS_WB,
   };

   return map;
}

/**
 * See iris_upload_render_state's IRIS_DIRTY_VERTEX_BUFFERS handling for
 * a comment about why these VF invalidations are needed.
 */
static void
blorp_vf_invalidate_for_vb_48b_transitions(struct blorp_batch *blorp_batch,
                                           const struct blorp_address *addrs,
                                           unsigned num_vbs)
{
   struct iris_context *ice = blorp_batch->blorp->driver_ctx;
   struct iris_batch *batch = blorp_batch->driver_batch;
   bool need_invalidate = false;

   for (unsigned i = 0; i < num_vbs; i++) {
      struct iris_bo *bo = addrs[i].buffer;
      uint16_t high_bits = bo->gtt_offset >> 32u;

      if (high_bits != ice->state.last_vbo_high_bits[i]) {
         need_invalidate = true;
         ice->state.last_vbo_high_bits[i] = high_bits;
      }
   }

   if (need_invalidate) {
      iris_emit_pipe_control_flush(batch,
                                   "workaround: VF cache 32-bit key [blorp]",
                                   PIPE_CONTROL_VF_CACHE_INVALIDATE |
                                   PIPE_CONTROL_CS_STALL);
   }
}

static struct blorp_address
blorp_get_workaround_page(struct blorp_batch *blorp_batch)
{
   struct iris_batch *batch = blorp_batch->driver_batch;

   return (struct blorp_address) { .buffer = batch->screen->workaround_bo };
}

static void
blorp_flush_range(UNUSED struct blorp_batch *blorp_batch,
                  UNUSED void *start,
                  UNUSED size_t size)
{
   /* All allocated states come from the batch which we will flush before we
    * submit it.  There's nothing for us to do here.
    */
}

static void
blorp_emit_urb_config(struct blorp_batch *blorp_batch,
                      unsigned vs_entry_size,
                      UNUSED unsigned sf_entry_size)
{
   struct iris_context *ice = blorp_batch->blorp->driver_ctx;
   struct iris_batch *batch = blorp_batch->driver_batch;

   unsigned size[4] = { vs_entry_size, 1, 1, 1 };

   /* If last VS URB size is good enough for what the BLORP operation needed,
    * then we can skip reconfiguration
    */
   if (ice->shaders.last_vs_entry_size >= vs_entry_size)
      return;

   genX(emit_urb_setup)(ice, batch, size, false, false);
   ice->state.dirty |= IRIS_DIRTY_URB;
}

static void
iris_blorp_exec(struct blorp_batch *blorp_batch,
                const struct blorp_params *params)
{
   struct iris_context *ice = blorp_batch->blorp->driver_ctx;
   struct iris_batch *batch = blorp_batch->driver_batch;

#if GEN_GEN >= 11
   /* The PIPE_CONTROL command description says:
    *
    *    "Whenever a Binding Table Index (BTI) used by a Render Target Message
    *     points to a different RENDER_SURFACE_STATE, SW must issue a Render
    *     Target Cache Flush by enabling this bit. When render target flush
    *     is set due to new association of BTI, PS Scoreboard Stall bit must
    *     be set in this packet."
    */
   iris_emit_pipe_control_flush(batch,
                                "workaround: RT BTI change [blorp]",
                                PIPE_CONTROL_RENDER_TARGET_FLUSH |
                                PIPE_CONTROL_STALL_AT_SCOREBOARD);
#endif

   /* Flush the sampler and render caches.  We definitely need to flush the
    * sampler cache so that we get updated contents from the render cache for
    * the glBlitFramebuffer() source.  Also, we are sometimes warned in the
    * docs to flush the cache between reinterpretations of the same surface
    * data with different formats, which blorp does for stencil and depth
    * data.
    */
   if (params->src.enabled)
      iris_cache_flush_for_read(batch, params->src.addr.buffer);
   if (params->dst.enabled) {
      iris_cache_flush_for_render(batch, params->dst.addr.buffer,
                                  params->dst.view.format,
                                  params->dst.aux_usage);
   }
   if (params->depth.enabled)
      iris_cache_flush_for_depth(batch, params->depth.addr.buffer);
   if (params->stencil.enabled)
      iris_cache_flush_for_depth(batch, params->stencil.addr.buffer);

   iris_require_command_space(batch, 1400);

#if GEN_GEN == 8
   genX(update_pma_fix)(ice, batch, false);
#endif

   const unsigned scale = params->fast_clear_op ? UINT_MAX : 1;
   if (ice->state.current_hash_scale != scale) {
      genX(emit_hashing_mode)(ice, batch, params->x1 - params->x0,
                              params->y1 - params->y0, scale);
   }

#if GEN_GEN >= 12
   genX(emit_aux_map_state)(batch);
#endif

   iris_handle_always_flush_cache(batch);

   blorp_exec(blorp_batch, params);

   iris_handle_always_flush_cache(batch);

   /* We've smashed all state compared to what the normal 3D pipeline
    * rendering tracks for GL.
    */

   uint64_t skip_bits = (IRIS_DIRTY_POLYGON_STIPPLE |
                         IRIS_DIRTY_SO_BUFFERS |
                         IRIS_DIRTY_SO_DECL_LIST |
                         IRIS_DIRTY_LINE_STIPPLE |
                         IRIS_ALL_DIRTY_FOR_COMPUTE |
                         IRIS_DIRTY_SCISSOR_RECT |
                         IRIS_DIRTY_UNCOMPILED_VS |
                         IRIS_DIRTY_UNCOMPILED_TCS |
                         IRIS_DIRTY_UNCOMPILED_TES |
                         IRIS_DIRTY_UNCOMPILED_GS |
                         IRIS_DIRTY_UNCOMPILED_FS |
                         IRIS_DIRTY_VF |
                         IRIS_DIRTY_URB |
                         IRIS_DIRTY_SF_CL_VIEWPORT |
                         IRIS_DIRTY_SAMPLER_STATES_VS |
                         IRIS_DIRTY_SAMPLER_STATES_TCS |
                         IRIS_DIRTY_SAMPLER_STATES_TES |
                         IRIS_DIRTY_SAMPLER_STATES_GS);

   if (!ice->shaders.uncompiled[MESA_SHADER_TESS_EVAL]) {
      /* BLORP disabled tessellation, that's fine for the next draw */
      skip_bits |= IRIS_DIRTY_TCS |
                   IRIS_DIRTY_TES |
                   IRIS_DIRTY_CONSTANTS_TCS |
                   IRIS_DIRTY_CONSTANTS_TES |
                   IRIS_DIRTY_BINDINGS_TCS |
                   IRIS_DIRTY_BINDINGS_TES;
   }

   if (!ice->shaders.uncompiled[MESA_SHADER_GEOMETRY]) {
      /* BLORP disabled geometry shaders, that's fine for the next draw */
      skip_bits |= IRIS_DIRTY_GS |
                   IRIS_DIRTY_CONSTANTS_GS |
                   IRIS_DIRTY_BINDINGS_GS;
   }

   /* we can skip flagging IRIS_DIRTY_DEPTH_BUFFER, if
    * BLORP_BATCH_NO_EMIT_DEPTH_STENCIL is set.
    */
   if (blorp_batch->flags & BLORP_BATCH_NO_EMIT_DEPTH_STENCIL)
      skip_bits |= IRIS_DIRTY_DEPTH_BUFFER;

   if (!params->wm_prog_data)
      skip_bits |= IRIS_DIRTY_BLEND_STATE | IRIS_DIRTY_PS_BLEND;

   ice->state.dirty |= ~skip_bits;

   if (params->dst.enabled) {
      iris_render_cache_add_bo(batch, params->dst.addr.buffer,
                               params->dst.view.format,
                               params->dst.aux_usage);
   }
   if (params->depth.enabled)
      iris_depth_cache_add_bo(batch, params->depth.addr.buffer);
   if (params->stencil.enabled)
      iris_depth_cache_add_bo(batch, params->stencil.addr.buffer);
}

void
genX(init_blorp)(struct iris_context *ice)
{
   struct iris_screen *screen = (struct iris_screen *)ice->ctx.screen;

   blorp_init(&ice->blorp, ice, &screen->isl_dev);
   ice->blorp.compiler = screen->compiler;
   ice->blorp.lookup_shader = iris_blorp_lookup_shader;
   ice->blorp.upload_shader = iris_blorp_upload_shader;
   ice->blorp.exec = iris_blorp_exec;
}
