/*
 * Copyright 2012 Francisco Jerez
 * Copyright 2015 Samuel Pitoiset
 *
 * 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 (including the
 * next paragraph) 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
 *
 */

#include "util/format/u_format.h"
#include "nv50/nv50_context.h"
#include "nv50/nv50_compute.xml.h"

#include "codegen/nv50_ir_driver.h"

int
nv50_screen_compute_setup(struct nv50_screen *screen,
                          struct nouveau_pushbuf *push)
{
   struct nouveau_device *dev = screen->base.device;
   struct nouveau_object *chan = screen->base.channel;
   struct nv04_fifo *fifo = (struct nv04_fifo *)chan->data;
   unsigned obj_class;
   int i, ret;

   switch (dev->chipset & 0xf0) {
   case 0x50:
   case 0x80:
   case 0x90:
      obj_class = NV50_COMPUTE_CLASS;
      break;
   case 0xa0:
      switch (dev->chipset) {
      case 0xa3:
      case 0xa5:
      case 0xa8:
         obj_class = NVA3_COMPUTE_CLASS;
         break;
      default:
         obj_class = NV50_COMPUTE_CLASS;
         break;
      }
      break;
   default:
      NOUVEAU_ERR("unsupported chipset: NV%02x\n", dev->chipset);
      return -1;
   }

   ret = nouveau_object_new(chan, 0xbeef50c0, obj_class, NULL, 0,
                            &screen->compute);
   if (ret)
      return ret;

   BEGIN_NV04(push, SUBC_CP(NV01_SUBCHAN_OBJECT), 1);
   PUSH_DATA (push, screen->compute->handle);

   BEGIN_NV04(push, NV50_CP(UNK02A0), 1);
   PUSH_DATA (push, 1);
   BEGIN_NV04(push, NV50_CP(DMA_STACK), 1);
   PUSH_DATA (push, fifo->vram);
   BEGIN_NV04(push, NV50_CP(STACK_ADDRESS_HIGH), 2);
   PUSH_DATAh(push, screen->stack_bo->offset);
   PUSH_DATA (push, screen->stack_bo->offset);
   BEGIN_NV04(push, NV50_CP(STACK_SIZE_LOG), 1);
   PUSH_DATA (push, 4);

   BEGIN_NV04(push, NV50_CP(UNK0290), 1);
   PUSH_DATA (push, 1);
   BEGIN_NV04(push, NV50_CP(LANES32_ENABLE), 1);
   PUSH_DATA (push, 1);
   BEGIN_NV04(push, NV50_CP(REG_MODE), 1);
   PUSH_DATA (push, NV50_COMPUTE_REG_MODE_STRIPED);
   BEGIN_NV04(push, NV50_CP(UNK0384), 1);
   PUSH_DATA (push, 0x100);
   BEGIN_NV04(push, NV50_CP(DMA_GLOBAL), 1);
   PUSH_DATA (push, fifo->vram);

   for (i = 0; i < 15; i++) {
      BEGIN_NV04(push, NV50_CP(GLOBAL_ADDRESS_HIGH(i)), 2);
      PUSH_DATA (push, 0);
      PUSH_DATA (push, 0);
      BEGIN_NV04(push, NV50_CP(GLOBAL_LIMIT(i)), 1);
      PUSH_DATA (push, 0);
      BEGIN_NV04(push, NV50_CP(GLOBAL_MODE(i)), 1);
      PUSH_DATA (push, NV50_COMPUTE_GLOBAL_MODE_LINEAR);
   }

   BEGIN_NV04(push, NV50_CP(GLOBAL_ADDRESS_HIGH(15)), 2);
   PUSH_DATA (push, 0);
   PUSH_DATA (push, 0);
   BEGIN_NV04(push, NV50_CP(GLOBAL_LIMIT(15)), 1);
   PUSH_DATA (push, ~0);
   BEGIN_NV04(push, NV50_CP(GLOBAL_MODE(15)), 1);
   PUSH_DATA (push, NV50_COMPUTE_GLOBAL_MODE_LINEAR);

   BEGIN_NV04(push, NV50_CP(LOCAL_WARPS_LOG_ALLOC), 1);
   PUSH_DATA (push, 7);
   BEGIN_NV04(push, NV50_CP(LOCAL_WARPS_NO_CLAMP), 1);
   PUSH_DATA (push, 1);
   BEGIN_NV04(push, NV50_CP(STACK_WARPS_LOG_ALLOC), 1);
   PUSH_DATA (push, 7);
   BEGIN_NV04(push, NV50_CP(STACK_WARPS_NO_CLAMP), 1);
   PUSH_DATA (push, 1);
   BEGIN_NV04(push, NV50_CP(USER_PARAM_COUNT), 1);
   PUSH_DATA (push, 0);

   BEGIN_NV04(push, NV50_CP(DMA_TEXTURE), 1);
   PUSH_DATA (push, fifo->vram);
   BEGIN_NV04(push, NV50_CP(TEX_LIMITS), 1);
   PUSH_DATA (push, 0x54);
   BEGIN_NV04(push, NV50_CP(LINKED_TSC), 1);
   PUSH_DATA (push, 0);

   BEGIN_NV04(push, NV50_CP(DMA_TIC), 1);
   PUSH_DATA (push, fifo->vram);
   BEGIN_NV04(push, NV50_CP(TIC_ADDRESS_HIGH), 3);
   PUSH_DATAh(push, screen->txc->offset);
   PUSH_DATA (push, screen->txc->offset);
   PUSH_DATA (push, NV50_TIC_MAX_ENTRIES - 1);

   BEGIN_NV04(push, NV50_CP(DMA_TSC), 1);
   PUSH_DATA (push, fifo->vram);
   BEGIN_NV04(push, NV50_CP(TSC_ADDRESS_HIGH), 3);
   PUSH_DATAh(push, screen->txc->offset + 65536);
   PUSH_DATA (push, screen->txc->offset + 65536);
   PUSH_DATA (push, NV50_TSC_MAX_ENTRIES - 1);

   BEGIN_NV04(push, NV50_CP(DMA_CODE_CB), 1);
   PUSH_DATA (push, fifo->vram);

   BEGIN_NV04(push, NV50_CP(DMA_LOCAL), 1);
   PUSH_DATA (push, fifo->vram);
   BEGIN_NV04(push, NV50_CP(LOCAL_ADDRESS_HIGH), 2);
   PUSH_DATAh(push, screen->tls_bo->offset + 65536);
   PUSH_DATA (push, screen->tls_bo->offset + 65536);
   BEGIN_NV04(push, NV50_CP(LOCAL_SIZE_LOG), 1);
   PUSH_DATA (push, util_logbase2((screen->max_tls_space / ONE_TEMP_SIZE) * 2));

   BEGIN_NV04(push, NV50_CP(CB_DEF_ADDRESS_HIGH), 3);
   PUSH_DATAh(push, screen->uniforms->offset + (3 << 16));
   PUSH_DATA (push, screen->uniforms->offset + (3 << 16));
   PUSH_DATA (push, (NV50_CB_PCP << 16) | 0x0000);

   BEGIN_NV04(push, NV50_CP(QUERY_ADDRESS_HIGH), 2);
   PUSH_DATAh(push, screen->fence.bo->offset + 16);
   PUSH_DATA (push, screen->fence.bo->offset + 16);

   return 0;
}

static void
nv50_compute_validate_samplers(struct nv50_context *nv50)
{
   bool need_flush = nv50_validate_tsc(nv50, NV50_SHADER_STAGE_COMPUTE);
   if (need_flush) {
      BEGIN_NV04(nv50->base.pushbuf, NV50_CP(TSC_FLUSH), 1);
      PUSH_DATA (nv50->base.pushbuf, 0);
   }

   /* Invalidate all 3D samplers because they are aliased. */
   nv50->dirty_3d |= NV50_NEW_3D_SAMPLERS;
}

static void
nv50_compute_validate_textures(struct nv50_context *nv50)
{
   bool need_flush = nv50_validate_tic(nv50, NV50_SHADER_STAGE_COMPUTE);
   if (need_flush) {
      BEGIN_NV04(nv50->base.pushbuf, NV50_CP(TIC_FLUSH), 1);
      PUSH_DATA (nv50->base.pushbuf, 0);
   }

   /* Invalidate all 3D textures because they are aliased. */
   nouveau_bufctx_reset(nv50->bufctx_3d, NV50_BIND_3D_TEXTURES);
   nv50->dirty_3d |= NV50_NEW_3D_TEXTURES;
}

static inline void
nv50_compute_invalidate_constbufs(struct nv50_context *nv50)
{
   int s;

   /* Invalidate all 3D constbufs because they are aliased with COMPUTE. */
   for (s = 0; s < NV50_MAX_3D_SHADER_STAGES; s++) {
      nv50->constbuf_dirty[s] |= nv50->constbuf_valid[s];
      nv50->state.uniform_buffer_bound[s] = false;
   }
   nv50->dirty_3d |= NV50_NEW_3D_CONSTBUF;
}

static void
nv50_compute_validate_constbufs(struct nv50_context *nv50)
{
   struct nouveau_pushbuf *push = nv50->base.pushbuf;
   const int s = NV50_SHADER_STAGE_COMPUTE;

   while (nv50->constbuf_dirty[s]) {
      int i = ffs(nv50->constbuf_dirty[s]) - 1;
      nv50->constbuf_dirty[s] &= ~(1 << i);

      if (nv50->constbuf[s][i].user) {
         const unsigned b = NV50_CB_PVP + s;
         unsigned start = 0;
         unsigned words = nv50->constbuf[s][0].size / 4;
         if (i) {
            NOUVEAU_ERR("user constbufs only supported in slot 0\n");
            continue;
         }
         if (!nv50->state.uniform_buffer_bound[s]) {
            nv50->state.uniform_buffer_bound[s] = true;
            BEGIN_NV04(push, NV50_CP(SET_PROGRAM_CB), 1);
            PUSH_DATA (push, (b << 12) | (i << 8) | 1);
         }
         while (words) {
            unsigned nr = MIN2(words, NV04_PFIFO_MAX_PACKET_LEN);

            PUSH_SPACE(push, nr + 3);
            BEGIN_NV04(push, NV50_CP(CB_ADDR), 1);
            PUSH_DATA (push, (start << 8) | b);
            BEGIN_NI04(push, NV50_CP(CB_DATA(0)), nr);
            PUSH_DATAp(push, &nv50->constbuf[s][0].u.data[start * 4], nr);

            start += nr;
            words -= nr;
         }
      } else {
         struct nv04_resource *res =
            nv04_resource(nv50->constbuf[s][i].u.buf);
         if (res) {
            /* TODO: allocate persistent bindings */
            const unsigned b = s * 16 + i;

            assert(nouveau_resource_mapped_by_gpu(&res->base));

            BEGIN_NV04(push, NV50_CP(CB_DEF_ADDRESS_HIGH), 3);
            PUSH_DATAh(push, res->address + nv50->constbuf[s][i].offset);
            PUSH_DATA (push, res->address + nv50->constbuf[s][i].offset);
            PUSH_DATA (push, (b << 16) |
                       (nv50->constbuf[s][i].size & 0xffff));
            BEGIN_NV04(push, NV50_CP(SET_PROGRAM_CB), 1);
            PUSH_DATA (push, (b << 12) | (i << 8) | 1);

            BCTX_REFN(nv50->bufctx_cp, CP_CB(i), res, RD);

            nv50->cb_dirty = 1; /* Force cache flush for UBO. */
            res->cb_bindings[s] |= 1 << i;
         } else {
            BEGIN_NV04(push, NV50_CP(SET_PROGRAM_CB), 1);
            PUSH_DATA (push, (i << 8) | 0);
         }
         if (i == 0)
            nv50->state.uniform_buffer_bound[s] = false;
      }
   }

   // TODO: Check if having orthogonal slots means the two don't trample over
   // each other.
   nv50_compute_invalidate_constbufs(nv50);
}

static void
nv50_get_surface_dims(const struct pipe_image_view *view,
                      int *width, int *height, int *depth)
{
   struct nv04_resource *res = nv04_resource(view->resource);
   int level;

   *width = *height = *depth = 1;
   if (res->base.target == PIPE_BUFFER) {
      *width = view->u.buf.size / util_format_get_blocksize(view->format);
      return;
   }

   level = view->u.tex.level;
   *width = u_minify(view->resource->width0, level);
   *height = u_minify(view->resource->height0, level);
   *depth = u_minify(view->resource->depth0, level);

   switch (res->base.target) {
   case PIPE_TEXTURE_1D_ARRAY:
   case PIPE_TEXTURE_2D_ARRAY:
   case PIPE_TEXTURE_CUBE:
   case PIPE_TEXTURE_CUBE_ARRAY:
      *depth = view->u.tex.last_layer - view->u.tex.first_layer + 1;
      break;
   case PIPE_TEXTURE_1D:
   case PIPE_TEXTURE_2D:
   case PIPE_TEXTURE_RECT:
   case PIPE_TEXTURE_3D:
      break;
   default:
      assert(!"unexpected texture target");
      break;
   }
}

static void
nv50_mark_image_range_valid(const struct pipe_image_view *view)
{
   struct nv04_resource *res = (struct nv04_resource *)view->resource;

   assert(view->resource->target == PIPE_BUFFER);

   util_range_add(&res->base, &res->valid_buffer_range,
                  view->u.buf.offset,
                  view->u.buf.offset + view->u.buf.size);
}

static inline void
nv50_set_surface_info(struct nouveau_pushbuf *push,
                      const struct pipe_image_view *view,
                      int width, int height, int depth)
{
   struct nv04_resource *res;
   uint32_t *const info = push->cur;

   push->cur += 12;

   /* Make sure to always initialize the surface information area because it's
    * used to check if the given image is bound or not. */
   memset(info, 0, 12 * sizeof(*info));

   if (!view || !view->resource)
      return;
   res = nv04_resource(view->resource);

   /* Stick the image dimensions for the imageSize() builtin. */
   info[0] = width;
   info[1] = height;
   info[2] = depth;

   /* Stick the blockwidth (ie. number of bytes per pixel) to calculate pixel
    * offset and to check if the format doesn't mismatch. */
   info[3] = util_format_get_blocksize(view->format);

   if (res->base.target != PIPE_BUFFER) {
      struct nv50_miptree *mt = nv50_miptree(&res->base);
      struct nv50_miptree_level *lvl = &mt->level[view->u.tex.level];
      unsigned nby = align(util_format_get_nblocksy(view->format, height),
                           NV50_TILE_SIZE_Y(lvl->tile_mode));

      if (mt->layout_3d) {
         info[4] = nby;
         info[11] = view->u.tex.first_layer;
      } else {
         info[4] = mt->layer_stride / lvl->pitch;
      }
      info[6] = mt->ms_x;
      info[7] = mt->ms_y;
      info[8] = NV50_TILE_SHIFT_X(lvl->tile_mode);
      info[9] = NV50_TILE_SHIFT_Y(lvl->tile_mode);
      info[10] = NV50_TILE_SHIFT_Z(lvl->tile_mode);
   }
}

static void
nv50_compute_validate_surfaces(struct nv50_context *nv50)
{
   struct nouveau_pushbuf *push = nv50->base.pushbuf;
   int i;

   for (i = 0; i < NV50_MAX_GLOBALS - 1; i++) {
      struct nv50_gmem_state *gmem = &nv50->compprog->cp.gmem[i];
      int width, height, depth;
      uint64_t address = 0;

      BEGIN_NV04(push, NV50_CP(GLOBAL(i)), 5);

      if (gmem->valid && !gmem->image && nv50->buffers[gmem->slot].buffer) {
         struct pipe_shader_buffer *buffer = &nv50->buffers[gmem->slot];
         struct nv04_resource *res = nv04_resource(buffer->buffer);
         PUSH_DATAh(push, res->address + buffer->buffer_offset);
         PUSH_DATA (push, res->address + buffer->buffer_offset);
         PUSH_DATA (push, 0); /* pitch? */
         PUSH_DATA (push, ALIGN(buffer->buffer_size, 256) - 1);
         PUSH_DATA (push, NV50_COMPUTE_GLOBAL_MODE_LINEAR);
         BCTX_REFN(nv50->bufctx_cp, CP_BUF, res, RDWR);
         util_range_add(&res->base, &res->valid_buffer_range,
                        buffer->buffer_offset,
                        buffer->buffer_offset +
                        buffer->buffer_size);

         PUSH_SPACE(push, 1 + 3);
         BEGIN_NV04(push, NV50_CP(CB_ADDR), 1);
         PUSH_DATA (push, NV50_CB_AUX_BUF_INFO(i) << (8 - 2) | NV50_CB_AUX);
         BEGIN_NI04(push, NV50_CP(CB_DATA(0)), 1);
         PUSH_DATA (push, buffer->buffer_size);
      } else if (gmem->valid && gmem->image && nv50->images[gmem->slot].resource) {
         struct pipe_image_view *view = &nv50->images[gmem->slot];
         struct nv04_resource *res = nv04_resource(view->resource);

         /* get surface dimensions based on the target. */
         nv50_get_surface_dims(view, &width, &height, &depth);

         address = res->address;
         if (res->base.target == PIPE_BUFFER) {
            address += view->u.buf.offset;
            assert(!(address & 0xff));

            if (view->access & PIPE_IMAGE_ACCESS_WRITE)
               nv50_mark_image_range_valid(view);

            PUSH_DATAh(push, address);
            PUSH_DATA (push, address);
            PUSH_DATA (push, 0); /* pitch? */
            PUSH_DATA (push, ALIGN(view->u.buf.size, 0x100) - 1);
            PUSH_DATA (push, NV50_COMPUTE_GLOBAL_MODE_LINEAR);
         } else {
            struct nv50_miptree *mt = nv50_miptree(view->resource);
            struct nv50_miptree_level *lvl = &mt->level[view->u.tex.level];
            const unsigned z = view->u.tex.first_layer;
            unsigned max_size;

            if (mt->layout_3d) {
               address += nv50_mt_zslice_offset(mt, view->u.tex.level, 0);
               max_size = mt->total_size;
            } else {
               address += mt->layer_stride * z;
               max_size = mt->layer_stride * (view->u.tex.last_layer - view->u.tex.first_layer + 1);
            }
            address += lvl->offset;

            PUSH_DATAh(push, address);
            PUSH_DATA (push, address);
            if (mt->layout_3d) {
               // We have to adjust the size of the 3d surface to be
               // accessible within 2d limits. The size of each z tile goes
               // into the x direction, while the number of z tiles goes into
               // the y direction.
               const unsigned nby = util_format_get_nblocksy(view->format, height);
               const unsigned tsy = NV50_TILE_SIZE_Y(lvl->tile_mode);
               const unsigned tsz = NV50_TILE_SIZE_Z(lvl->tile_mode);
               const unsigned pitch = lvl->pitch * tsz;
               const unsigned maxy = align(nby, tsy) * align(depth, tsz) >> NV50_TILE_SHIFT_Z(lvl->tile_mode);
               PUSH_DATA (push, pitch * tsy);
               PUSH_DATA (push, (maxy - 1) << 16 | (pitch - 1));
               PUSH_DATA (push, (lvl->tile_mode & 0xff) << 4);
            } else if (nouveau_bo_memtype(res->bo)) {
               PUSH_DATA (push, lvl->pitch * NV50_TILE_SIZE_Y(lvl->tile_mode));
               PUSH_DATA (push, (max_size / lvl->pitch - 1) << 16 | (lvl->pitch - 1));
               PUSH_DATA (push, (lvl->tile_mode & 0xff) << 4);
            } else {
               PUSH_DATA (push, lvl->pitch);
               PUSH_DATA (push, align(lvl->pitch * height, 0x100) - 1);
               PUSH_DATA (push, NV50_COMPUTE_GLOBAL_MODE_LINEAR);
            }
         }

         BCTX_REFN(nv50->bufctx_cp, CP_SUF, res, RDWR);

         PUSH_SPACE(push, 12 + 3);
         BEGIN_NV04(push, NV50_CP(CB_ADDR), 1);
         PUSH_DATA (push, NV50_CB_AUX_BUF_INFO(i) << (8 - 2) | NV50_CB_AUX);
         BEGIN_NI04(push, NV50_CP(CB_DATA(0)), 12);
         nv50_set_surface_info(push, view, width, height, depth);
      } else {
         PUSH_DATA (push, 0);
         PUSH_DATA (push, 0);
         PUSH_DATA (push, 0);
         PUSH_DATA (push, 0);
         PUSH_DATA (push, 0);
      }
   }
}

static void
nv50_compute_validate_globals(struct nv50_context *nv50)
{
   unsigned i;

   for (i = 0; i < nv50->global_residents.size / sizeof(struct pipe_resource *);
        ++i) {
      struct pipe_resource *res = *util_dynarray_element(
         &nv50->global_residents, struct pipe_resource *, i);
      if (res)
         nv50_add_bufctx_resident(nv50->bufctx_cp, NV50_BIND_CP_GLOBAL,
                                  nv04_resource(res), NOUVEAU_BO_RDWR);
   }
}

static struct nv50_state_validate
validate_list_cp[] = {
   { nv50_compprog_validate,              NV50_NEW_CP_PROGRAM     },
   { nv50_compute_validate_constbufs,     NV50_NEW_CP_CONSTBUF    },
   { nv50_compute_validate_surfaces,      NV50_NEW_CP_SURFACES |
                                          NV50_NEW_CP_BUFFERS  |
                                          NV50_NEW_CP_PROGRAM     },
   { nv50_compute_validate_textures,      NV50_NEW_CP_TEXTURES    },
   { nv50_compute_validate_samplers,      NV50_NEW_CP_SAMPLERS    },
   { nv50_compute_validate_globals,       NV50_NEW_CP_GLOBALS     },
};

static bool
nv50_state_validate_cp(struct nv50_context *nv50, uint32_t mask)
{
   bool ret;

   /* TODO: validate textures, samplers, surfaces */
   ret = nv50_state_validate(nv50, mask, validate_list_cp,
                             ARRAY_SIZE(validate_list_cp), &nv50->dirty_cp,
                             nv50->bufctx_cp);

   if (unlikely(nv50->state.flushed))
      nv50_bufctx_fence(nv50->bufctx_cp, true);
   return ret;
}

static void
nv50_compute_upload_input(struct nv50_context *nv50, const uint32_t *input)
{
   struct nv50_screen *screen = nv50->screen;
   struct nouveau_pushbuf *push = screen->base.pushbuf;
   unsigned size = align(nv50->compprog->parm_size, 0x4);

   BEGIN_NV04(push, NV50_CP(USER_PARAM_COUNT), 1);
   PUSH_DATA (push, (1 + (size / 4)) << 8);

   if (size) {
      struct nouveau_mm_allocation *mm;
      struct nouveau_bo *bo = NULL;
      unsigned offset;

      mm = nouveau_mm_allocate(screen->base.mm_GART, size, &bo, &offset);
      assert(mm);

      nouveau_bo_map(bo, 0, screen->base.client);
      memcpy(bo->map + offset, input, size);

      nouveau_bufctx_refn(nv50->bufctx, 0, bo, NOUVEAU_BO_GART | NOUVEAU_BO_RD);
      nouveau_pushbuf_bufctx(push, nv50->bufctx);
      nouveau_pushbuf_validate(push);

      nouveau_pushbuf_space(push, 0, 0, 1);

      BEGIN_NV04(push, NV50_CP(USER_PARAM(1)), size / 4);
      nouveau_pushbuf_data(push, bo, offset, size);

      nouveau_fence_work(screen->base.fence.current, nouveau_mm_free_work, mm);
      nouveau_bo_ref(NULL, &bo);
      nouveau_bufctx_reset(nv50->bufctx, 0);
   }
}

void
nv50_launch_grid(struct pipe_context *pipe, const struct pipe_grid_info *info)
{
   struct nv50_context *nv50 = nv50_context(pipe);
   struct nouveau_pushbuf *push = nv50->base.pushbuf;
   unsigned block_size = info->block[0] * info->block[1] * info->block[2];
   struct nv50_program *cp = nv50->compprog;
   bool ret;

   ret = !nv50_state_validate_cp(nv50, ~0);
   if (ret) {
      NOUVEAU_ERR("Failed to launch grid !\n");
      return;
   }

   nv50_compute_upload_input(nv50, info->input);

   BEGIN_NV04(push, NV50_CP(CP_START_ID), 1);
   PUSH_DATA (push, cp->code_base);

   BEGIN_NV04(push, NV50_CP(SHARED_SIZE), 1);
   PUSH_DATA (push, align(cp->cp.smem_size + cp->parm_size + 0x14, 0x40));
   BEGIN_NV04(push, NV50_CP(CP_REG_ALLOC_TEMP), 1);
   PUSH_DATA (push, cp->max_gpr);

   /* no indirect support - just read the parameters out */
   uint32_t grid[3];
   if (unlikely(info->indirect)) {
      pipe_buffer_read(pipe, info->indirect, info->indirect_offset,
                       sizeof(grid), grid);
   } else {
      memcpy(grid, info->grid, sizeof(grid));
   }

   /* grid/block setup */
   BEGIN_NV04(push, NV50_CP(BLOCKDIM_XY), 2);
   PUSH_DATA (push, info->block[1] << 16 | info->block[0]);
   PUSH_DATA (push, info->block[2]);
   BEGIN_NV04(push, NV50_CP(BLOCK_ALLOC), 1);
   PUSH_DATA (push, 1 << 16 | block_size);
   BEGIN_NV04(push, NV50_CP(BLOCKDIM_LATCH), 1);
   PUSH_DATA (push, 1);
   BEGIN_NV04(push, NV50_CP(GRIDDIM), 1);
   PUSH_DATA (push, grid[1] << 16 | grid[0]);
   BEGIN_NV04(push, NV50_CP(GRIDID), 1);
   PUSH_DATA (push, 1);

   for (int i = 0; i < grid[2]; i++) {
      BEGIN_NV04(push, NV50_CP(USER_PARAM(0)), 1);
      PUSH_DATA (push, grid[2] | i << 16);

      /* kernel launching */
      BEGIN_NV04(push, NV50_CP(LAUNCH), 1);
      PUSH_DATA (push, 0);
   }

   BEGIN_NV04(push, SUBC_CP(NV50_GRAPH_SERIALIZE), 1);
   PUSH_DATA (push, 0);

   /* bind a compute shader clobbers fragment shader state */
   nv50->dirty_3d |= NV50_NEW_3D_FRAGPROG;

   nv50->compute_invocations += info->block[0] * info->block[1] * info->block[2] *
      grid[0] * grid[1] * grid[2];
}