radeonsi: clear PIPE_IMAGE_ACCESS_WRITE when it's invalid to be on the safe side

[mesa.git] / src / gallium / drivers / radeonsi / si_descriptors.c

/*
 * Copyright 2013 Advanced Micro Devices, Inc.
 *
 * 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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR 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.
 */

/* Resource binding slots and sampler states (each described with 8 or
 * 4 dwords) are stored in lists in memory which is accessed by shaders
 * using scalar load instructions.
 *
 * This file is responsible for managing such lists. It keeps a copy of all
 * descriptors in CPU memory and re-uploads a whole list if some slots have
 * been changed.
 *
 * This code is also reponsible for updating shader pointers to those lists.
 *
 * Note that CP DMA can't be used for updating the lists, because a GPU hang
 * could leave the list in a mid-IB state and the next IB would get wrong
 * descriptors and the whole context would be unusable at that point.
 * (Note: The register shadowing can't be used due to the same reason)
 *
 * Also, uploading descriptors to newly allocated memory doesn't require
 * a KCACHE flush.
 *
 *
 * Possible scenarios for one 16 dword image+sampler slot:
 *
 *       | Image        | w/ FMASK   | Buffer       | NULL
 * [ 0: 3] Image[0:3]   | Image[0:3] | Null[0:3]    | Null[0:3]
 * [ 4: 7] Image[4:7]   | Image[4:7] | Buffer[0:3]  | 0
 * [ 8:11] Null[0:3]    | Fmask[0:3] | Null[0:3]    | Null[0:3]
 * [12:15] Sampler[0:3] | Fmask[4:7] | Sampler[0:3] | Sampler[0:3]
 *
 * FMASK implies MSAA, therefore no sampler state.
 * Sampler states are never unbound except when FMASK is bound.
 */

#include "radeon/r600_cs.h"
#include "si_pipe.h"
#include "sid.h"
#include "gfx9d.h"

#include "util/hash_table.h"
#include "util/u_idalloc.h"
#include "util/u_format.h"
#include "util/u_memory.h"
#include "util/u_upload_mgr.h"


/* NULL image and buffer descriptor for textures (alpha = 1) and images
 * (alpha = 0).
 *
 * For images, all fields must be zero except for the swizzle, which
 * supports arbitrary combinations of 0s and 1s. The texture type must be
 * any valid type (e.g. 1D). If the texture type isn't set, the hw hangs.
 *
 * For buffers, all fields must be zero. If they are not, the hw hangs.
 *
 * This is the only reason why the buffer descriptor must be in words [4:7].
 */
static uint32_t null_texture_descriptor[8] = {
        0,
        0,
        0,
        S_008F1C_DST_SEL_W(V_008F1C_SQ_SEL_1) |
        S_008F1C_TYPE(V_008F1C_SQ_RSRC_IMG_1D)
        /* the rest must contain zeros, which is also used by the buffer
         * descriptor */
};

static uint32_t null_image_descriptor[8] = {
        0,
        0,
        0,
        S_008F1C_TYPE(V_008F1C_SQ_RSRC_IMG_1D)
        /* the rest must contain zeros, which is also used by the buffer
         * descriptor */
};

static uint64_t si_desc_extract_buffer_address(uint32_t *desc)
{
        return desc[0] | ((uint64_t)G_008F04_BASE_ADDRESS_HI(desc[1]) << 32);
}

static void si_init_descriptor_list(uint32_t *desc_list,
                                    unsigned element_dw_size,
                                    unsigned num_elements,
                                    const uint32_t *null_descriptor)
{
        int i;

        /* Initialize the array to NULL descriptors if the element size is 8. */
        if (null_descriptor) {
                assert(element_dw_size % 8 == 0);
                for (i = 0; i < num_elements * element_dw_size / 8; i++)
                        memcpy(desc_list + i * 8, null_descriptor, 8 * 4);
        }
}

static void si_init_descriptors(struct si_descriptors *desc,
                                unsigned shader_userdata_index,
                                unsigned element_dw_size,
                                unsigned num_elements)
{
        desc->list = CALLOC(num_elements, element_dw_size * 4);
        desc->element_dw_size = element_dw_size;
        desc->num_elements = num_elements;
        desc->shader_userdata_offset = shader_userdata_index * 4;
        desc->slot_index_to_bind_directly = -1;
}

static void si_release_descriptors(struct si_descriptors *desc)
{
        r600_resource_reference(&desc->buffer, NULL);
        FREE(desc->list);
}

static bool si_upload_descriptors(struct si_context *sctx,
                                  struct si_descriptors *desc)
{
        unsigned slot_size = desc->element_dw_size * 4;
        unsigned first_slot_offset = desc->first_active_slot * slot_size;
        unsigned upload_size = desc->num_active_slots * slot_size;

        /* Skip the upload if no shader is using the descriptors. dirty_mask
         * will stay dirty and the descriptors will be uploaded when there is
         * a shader using them.
         */
        if (!upload_size)
                return true;

        /* If there is just one active descriptor, bind it directly. */
        if ((int)desc->first_active_slot == desc->slot_index_to_bind_directly &&
            desc->num_active_slots == 1) {
                uint32_t *descriptor = &desc->list[desc->slot_index_to_bind_directly *
                                                   desc->element_dw_size];

                /* The buffer is already in the buffer list. */
                r600_resource_reference(&desc->buffer, NULL);
                desc->gpu_list = NULL;
                desc->gpu_address = si_desc_extract_buffer_address(descriptor);
                si_mark_atom_dirty(sctx, &sctx->shader_pointers.atom);
                return true;
        }

        uint32_t *ptr;
        int buffer_offset;
        u_upload_alloc(sctx->b.b.const_uploader, 0, upload_size,
                       si_optimal_tcc_alignment(sctx, upload_size),
                       (unsigned*)&buffer_offset,
                       (struct pipe_resource**)&desc->buffer,
                       (void**)&ptr);
        if (!desc->buffer) {
                desc->gpu_address = 0;
                return false; /* skip the draw call */
        }

        util_memcpy_cpu_to_le32(ptr, (char*)desc->list + first_slot_offset,
                                upload_size);
        desc->gpu_list = ptr - first_slot_offset / 4;

        radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx, desc->buffer,
                            RADEON_USAGE_READ, RADEON_PRIO_DESCRIPTORS);

        /* The shader pointer should point to slot 0. */
        buffer_offset -= first_slot_offset;
        desc->gpu_address = desc->buffer->gpu_address + buffer_offset;

        si_mark_atom_dirty(sctx, &sctx->shader_pointers.atom);
        return true;
}

static void
si_descriptors_begin_new_cs(struct si_context *sctx, struct si_descriptors *desc)
{
        if (!desc->buffer)
                return;

        radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx, desc->buffer,
                                  RADEON_USAGE_READ, RADEON_PRIO_DESCRIPTORS);
}

/* SAMPLER VIEWS */

static unsigned
si_sampler_and_image_descriptors_idx(unsigned shader)
{
        return SI_DESCS_FIRST_SHADER + shader * SI_NUM_SHADER_DESCS +
               SI_SHADER_DESCS_SAMPLERS_AND_IMAGES;
}

static struct si_descriptors *
si_sampler_and_image_descriptors(struct si_context *sctx, unsigned shader)
{
        return &sctx->descriptors[si_sampler_and_image_descriptors_idx(shader)];
}

static void si_release_sampler_views(struct si_samplers *samplers)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(samplers->views); i++) {
                pipe_sampler_view_reference(&samplers->views[i], NULL);
        }
}

static void si_sampler_view_add_buffer(struct si_context *sctx,
                                       struct pipe_resource *resource,
                                       enum radeon_bo_usage usage,
                                       bool is_stencil_sampler,
                                       bool check_mem)
{
        struct r600_resource *rres;
        struct r600_texture *rtex;
        enum radeon_bo_priority priority;

        if (!resource)
                return;

        if (resource->target != PIPE_BUFFER) {
                struct r600_texture *tex = (struct r600_texture*)resource;

                if (tex->is_depth && !r600_can_sample_zs(tex, is_stencil_sampler))
                        resource = &tex->flushed_depth_texture->resource.b.b;
        }

        rres = (struct r600_resource*)resource;
        priority = r600_get_sampler_view_priority(rres);

        radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx,
                                            rres, usage, priority,
                                            check_mem);

        if (resource->target == PIPE_BUFFER)
                return;

        /* Now add separate DCC or HTILE. */
        rtex = (struct r600_texture*)resource;
        if (rtex->dcc_separate_buffer) {
                radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx,
                                                    rtex->dcc_separate_buffer, usage,
                                                    RADEON_PRIO_DCC, check_mem);
        }
}

static void si_sampler_views_begin_new_cs(struct si_context *sctx,
                                          struct si_samplers *samplers)
{
        unsigned mask = samplers->enabled_mask;

        /* Add buffers to the CS. */
        while (mask) {
                int i = u_bit_scan(&mask);
                struct si_sampler_view *sview = (struct si_sampler_view *)samplers->views[i];

                si_sampler_view_add_buffer(sctx, sview->base.texture,
                                           RADEON_USAGE_READ,
                                           sview->is_stencil_sampler, false);
        }
}

/* Set buffer descriptor fields that can be changed by reallocations. */
static void si_set_buf_desc_address(struct r600_resource *buf,
                                    uint64_t offset, uint32_t *state)
{
        uint64_t va = buf->gpu_address + offset;

        state[0] = va;
        state[1] &= C_008F04_BASE_ADDRESS_HI;
        state[1] |= S_008F04_BASE_ADDRESS_HI(va >> 32);
}

/* Set texture descriptor fields that can be changed by reallocations.
 *
 * \param tex                   texture
 * \param base_level_info       information of the level of BASE_ADDRESS
 * \param base_level            the level of BASE_ADDRESS
 * \param first_level           pipe_sampler_view.u.tex.first_level
 * \param block_width           util_format_get_blockwidth()
 * \param is_stencil            select between separate Z & Stencil
 * \param state                 descriptor to update
 */
void si_set_mutable_tex_desc_fields(struct si_screen *sscreen,
                                    struct r600_texture *tex,
                                    const struct legacy_surf_level *base_level_info,
                                    unsigned base_level, unsigned first_level,
                                    unsigned block_width, bool is_stencil,
                                    uint32_t *state)
{
        uint64_t va, meta_va = 0;

        if (tex->is_depth && !r600_can_sample_zs(tex, is_stencil)) {
                tex = tex->flushed_depth_texture;
                is_stencil = false;
        }

        va = tex->resource.gpu_address;

        if (sscreen->b.chip_class >= GFX9) {
                /* Only stencil_offset needs to be added here. */
                if (is_stencil)
                        va += tex->surface.u.gfx9.stencil_offset;
                else
                        va += tex->surface.u.gfx9.surf_offset;
        } else {
                va += base_level_info->offset;
        }

        state[0] = va >> 8;
        state[1] &= C_008F14_BASE_ADDRESS_HI;
        state[1] |= S_008F14_BASE_ADDRESS_HI(va >> 40);

        /* Only macrotiled modes can set tile swizzle.
         * GFX9 doesn't use (legacy) base_level_info.
         */
        if (sscreen->b.chip_class >= GFX9 ||
            base_level_info->mode == RADEON_SURF_MODE_2D)
                state[0] |= tex->surface.tile_swizzle;

        if (sscreen->b.chip_class >= VI) {
                state[6] &= C_008F28_COMPRESSION_EN;
                state[7] = 0;

                if (vi_dcc_enabled(tex, first_level)) {
                        meta_va = (!tex->dcc_separate_buffer ? tex->resource.gpu_address : 0) +
                                  tex->dcc_offset;

                        if (sscreen->b.chip_class == VI) {
                                meta_va += base_level_info->dcc_offset;
                                assert(base_level_info->mode == RADEON_SURF_MODE_2D);
                        }

                        meta_va |= (uint32_t)tex->surface.tile_swizzle << 8;
                } else if (vi_tc_compat_htile_enabled(tex, first_level)) {
                        meta_va = tex->resource.gpu_address + tex->htile_offset;
                }

                if (meta_va) {
                        state[6] |= S_008F28_COMPRESSION_EN(1);
                        state[7] = meta_va >> 8;
                }
        }

        if (sscreen->b.chip_class >= GFX9) {
                state[3] &= C_008F1C_SW_MODE;
                state[4] &= C_008F20_PITCH_GFX9;

                if (is_stencil) {
                        state[3] |= S_008F1C_SW_MODE(tex->surface.u.gfx9.stencil.swizzle_mode);
                        state[4] |= S_008F20_PITCH_GFX9(tex->surface.u.gfx9.stencil.epitch);
                } else {
                        state[3] |= S_008F1C_SW_MODE(tex->surface.u.gfx9.surf.swizzle_mode);
                        state[4] |= S_008F20_PITCH_GFX9(tex->surface.u.gfx9.surf.epitch);
                }

                state[5] &= C_008F24_META_DATA_ADDRESS &
                            C_008F24_META_PIPE_ALIGNED &
                            C_008F24_META_RB_ALIGNED;
                if (meta_va) {
                        struct gfx9_surf_meta_flags meta;

                        if (tex->dcc_offset)
                                meta = tex->surface.u.gfx9.dcc;
                        else
                                meta = tex->surface.u.gfx9.htile;

                        state[5] |= S_008F24_META_DATA_ADDRESS(meta_va >> 40) |
                                    S_008F24_META_PIPE_ALIGNED(meta.pipe_aligned) |
                                    S_008F24_META_RB_ALIGNED(meta.rb_aligned);
                }
        } else {
                /* SI-CI-VI */
                unsigned pitch = base_level_info->nblk_x * block_width;
                unsigned index = si_tile_mode_index(tex, base_level, is_stencil);

                state[3] &= C_008F1C_TILING_INDEX;
                state[3] |= S_008F1C_TILING_INDEX(index);
                state[4] &= C_008F20_PITCH_GFX6;
                state[4] |= S_008F20_PITCH_GFX6(pitch - 1);
        }
}

static void si_set_sampler_state_desc(struct si_sampler_state *sstate,
                                      struct si_sampler_view *sview,
                                      struct r600_texture *tex,
                                      uint32_t *desc)
{
        if (sview && sview->is_integer)
                memcpy(desc, sstate->integer_val, 4*4);
        else if (tex && tex->upgraded_depth &&
                 (!sview || !sview->is_stencil_sampler))
                memcpy(desc, sstate->upgraded_depth_val, 4*4);
        else
                memcpy(desc, sstate->val, 4*4);
}

static void si_set_sampler_view_desc(struct si_context *sctx,
                                     struct si_sampler_view *sview,
                                     struct si_sampler_state *sstate,
                                     uint32_t *desc)
{
        struct pipe_sampler_view *view = &sview->base;
        struct r600_texture *rtex = (struct r600_texture *)view->texture;
        bool is_buffer = rtex->resource.b.b.target == PIPE_BUFFER;

        if (unlikely(!is_buffer && sview->dcc_incompatible)) {
                if (vi_dcc_enabled(rtex, view->u.tex.first_level))
                        if (!si_texture_disable_dcc(&sctx->b, rtex))
                                sctx->b.decompress_dcc(&sctx->b.b, rtex);

                sview->dcc_incompatible = false;
        }

        assert(rtex); /* views with texture == NULL aren't supported */
        memcpy(desc, sview->state, 8*4);

        if (is_buffer) {
                si_set_buf_desc_address(&rtex->resource,
                                        sview->base.u.buf.offset,
                                        desc + 4);
        } else {
                bool is_separate_stencil = rtex->db_compatible &&
                                           sview->is_stencil_sampler;

                si_set_mutable_tex_desc_fields(sctx->screen, rtex,
                                               sview->base_level_info,
                                               sview->base_level,
                                               sview->base.u.tex.first_level,
                                               sview->block_width,
                                               is_separate_stencil,
                                               desc);
        }

        if (!is_buffer && rtex->fmask.size) {
                memcpy(desc + 8, sview->fmask_state, 8*4);
        } else {
                /* Disable FMASK and bind sampler state in [12:15]. */
                memcpy(desc + 8, null_texture_descriptor, 4*4);

                if (sstate)
                        si_set_sampler_state_desc(sstate, sview,
                                                  is_buffer ? NULL : rtex,
                                                  desc + 12);
        }
}

static bool color_needs_decompression(struct r600_texture *rtex)
{
        return rtex->fmask.size ||
               (rtex->dirty_level_mask &&
                (rtex->cmask.size || rtex->dcc_offset));
}

static bool depth_needs_decompression(struct r600_texture *rtex)
{
        /* If the depth/stencil texture is TC-compatible, no decompression
         * will be done. The decompression function will only flush DB caches
         * to make it coherent with shaders. That's necessary because the driver
         * doesn't flush DB caches in any other case.
         */
        return rtex->db_compatible;
}

static void si_set_sampler_view(struct si_context *sctx,
                                unsigned shader,
                                unsigned slot, struct pipe_sampler_view *view,
                                bool disallow_early_out)
{
        struct si_samplers *samplers = &sctx->samplers[shader];
        struct si_sampler_view *rview = (struct si_sampler_view*)view;
        struct si_descriptors *descs = si_sampler_and_image_descriptors(sctx, shader);
        unsigned desc_slot = si_get_sampler_slot(slot);
        uint32_t *desc = descs->list + desc_slot * 16;

        if (samplers->views[slot] == view && !disallow_early_out)
                return;

        if (view) {
                struct r600_texture *rtex = (struct r600_texture *)view->texture;

                si_set_sampler_view_desc(sctx, rview,
                                         samplers->sampler_states[slot], desc);

                if (rtex->resource.b.b.target == PIPE_BUFFER) {
                        rtex->resource.bind_history |= PIPE_BIND_SAMPLER_VIEW;
                        samplers->needs_depth_decompress_mask &= ~(1u << slot);
                        samplers->needs_color_decompress_mask &= ~(1u << slot);
                } else {
                        if (depth_needs_decompression(rtex)) {
                                samplers->needs_depth_decompress_mask |= 1u << slot;
                        } else {
                                samplers->needs_depth_decompress_mask &= ~(1u << slot);
                        }
                        if (color_needs_decompression(rtex)) {
                                samplers->needs_color_decompress_mask |= 1u << slot;
                        } else {
                                samplers->needs_color_decompress_mask &= ~(1u << slot);
                        }

                        if (rtex->dcc_offset &&
                            p_atomic_read(&rtex->framebuffers_bound))
                                sctx->need_check_render_feedback = true;
                }

                pipe_sampler_view_reference(&samplers->views[slot], view);
                samplers->enabled_mask |= 1u << slot;

                /* Since this can flush, it must be done after enabled_mask is
                 * updated. */
                si_sampler_view_add_buffer(sctx, view->texture,
                                           RADEON_USAGE_READ,
                                           rview->is_stencil_sampler, true);
        } else {
                pipe_sampler_view_reference(&samplers->views[slot], NULL);
                memcpy(desc, null_texture_descriptor, 8*4);
                /* Only clear the lower dwords of FMASK. */
                memcpy(desc + 8, null_texture_descriptor, 4*4);
                /* Re-set the sampler state if we are transitioning from FMASK. */
                if (samplers->sampler_states[slot])
                        si_set_sampler_state_desc(samplers->sampler_states[slot], NULL, NULL,
                                                  desc + 12);

                samplers->enabled_mask &= ~(1u << slot);
                samplers->needs_depth_decompress_mask &= ~(1u << slot);
                samplers->needs_color_decompress_mask &= ~(1u << slot);
        }

        sctx->descriptors_dirty |= 1u << si_sampler_and_image_descriptors_idx(shader);
}

static void si_update_shader_needs_decompress_mask(struct si_context *sctx,
                                                   unsigned shader)
{
        struct si_samplers *samplers = &sctx->samplers[shader];
        unsigned shader_bit = 1 << shader;

        if (samplers->needs_depth_decompress_mask ||
            samplers->needs_color_decompress_mask ||
            sctx->images[shader].needs_color_decompress_mask)
                sctx->shader_needs_decompress_mask |= shader_bit;
        else
                sctx->shader_needs_decompress_mask &= ~shader_bit;
}

static void si_set_sampler_views(struct pipe_context *ctx,
                                 enum pipe_shader_type shader, unsigned start,
                                 unsigned count,
                                 struct pipe_sampler_view **views)
{
        struct si_context *sctx = (struct si_context *)ctx;
        int i;

        if (!count || shader >= SI_NUM_SHADERS)
                return;

        if (views) {
                for (i = 0; i < count; i++)
                        si_set_sampler_view(sctx, shader, start + i, views[i], false);
        } else {
                for (i = 0; i < count; i++)
                        si_set_sampler_view(sctx, shader, start + i, NULL, false);
        }

        si_update_shader_needs_decompress_mask(sctx, shader);
}

static void
si_samplers_update_needs_color_decompress_mask(struct si_samplers *samplers)
{
        unsigned mask = samplers->enabled_mask;

        while (mask) {
                int i = u_bit_scan(&mask);
                struct pipe_resource *res = samplers->views[i]->texture;

                if (res && res->target != PIPE_BUFFER) {
                        struct r600_texture *rtex = (struct r600_texture *)res;

                        if (color_needs_decompression(rtex)) {
                                samplers->needs_color_decompress_mask |= 1u << i;
                        } else {
                                samplers->needs_color_decompress_mask &= ~(1u << i);
                        }
                }
        }
}

/* IMAGE VIEWS */

static void
si_release_image_views(struct si_images *images)
{
        unsigned i;

        for (i = 0; i < SI_NUM_IMAGES; ++i) {
                struct pipe_image_view *view = &images->views[i];

                pipe_resource_reference(&view->resource, NULL);
        }
}

static void
si_image_views_begin_new_cs(struct si_context *sctx, struct si_images *images)
{
        uint mask = images->enabled_mask;

        /* Add buffers to the CS. */
        while (mask) {
                int i = u_bit_scan(&mask);
                struct pipe_image_view *view = &images->views[i];

                assert(view->resource);

                si_sampler_view_add_buffer(sctx, view->resource,
                                           RADEON_USAGE_READWRITE, false, false);
        }
}

static void
si_disable_shader_image(struct si_context *ctx, unsigned shader, unsigned slot)
{
        struct si_images *images = &ctx->images[shader];

        if (images->enabled_mask & (1u << slot)) {
                struct si_descriptors *descs = si_sampler_and_image_descriptors(ctx, shader);
                unsigned desc_slot = si_get_image_slot(slot);

                pipe_resource_reference(&images->views[slot].resource, NULL);
                images->needs_color_decompress_mask &= ~(1 << slot);

                memcpy(descs->list + desc_slot*8, null_image_descriptor, 8*4);
                images->enabled_mask &= ~(1u << slot);
                ctx->descriptors_dirty |= 1u << si_sampler_and_image_descriptors_idx(shader);
        }
}

static void
si_mark_image_range_valid(const struct pipe_image_view *view)
{
        struct r600_resource *res = (struct r600_resource *)view->resource;

        assert(res && res->b.b.target == PIPE_BUFFER);

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

static void si_set_shader_image_desc(struct si_context *ctx,
                                     const struct pipe_image_view *view,
                                     bool skip_decompress,
                                     uint32_t *desc)
{
        struct si_screen *screen = ctx->screen;
        struct r600_resource *res;

        res = (struct r600_resource *)view->resource;

        if (res->b.b.target == PIPE_BUFFER) {
                if (view->access & PIPE_IMAGE_ACCESS_WRITE)
                        si_mark_image_range_valid(view);

                si_make_buffer_descriptor(screen, res,
                                          view->format,
                                          view->u.buf.offset,
                                          view->u.buf.size, desc);
                si_set_buf_desc_address(res, view->u.buf.offset, desc + 4);
        } else {
                static const unsigned char swizzle[4] = { 0, 1, 2, 3 };
                struct r600_texture *tex = (struct r600_texture *)res;
                unsigned level = view->u.tex.level;
                unsigned width, height, depth, hw_level;
                bool uses_dcc = vi_dcc_enabled(tex, level);
                unsigned access = view->access;

                /* Clear the write flag when writes can't occur.
                 * Note that DCC_DECOMPRESS for MSAA doesn't work in some cases,
                 * so we don't wanna trigger it.
                 */
                if (tex->is_depth || tex->resource.b.b.nr_samples >= 2) {
                        assert(!"Z/S and MSAA image stores are not supported");
                        access &= ~PIPE_IMAGE_ACCESS_WRITE;
                }

                assert(!tex->is_depth);
                assert(tex->fmask.size == 0);

                if (uses_dcc && !skip_decompress &&
                    (view->access & PIPE_IMAGE_ACCESS_WRITE ||
                     !vi_dcc_formats_compatible(res->b.b.format, view->format))) {
                        /* If DCC can't be disabled, at least decompress it.
                         * The decompression is relatively cheap if the surface
                         * has been decompressed already.
                         */
                        if (!si_texture_disable_dcc(&ctx->b, tex))
                                ctx->b.decompress_dcc(&ctx->b.b, tex);
                }

                if (ctx->b.chip_class >= GFX9) {
                        /* Always set the base address. The swizzle modes don't
                         * allow setting mipmap level offsets as the base.
                         */
                        width = res->b.b.width0;
                        height = res->b.b.height0;
                        depth = res->b.b.depth0;
                        hw_level = level;
                } else {
                        /* Always force the base level to the selected level.
                         *
                         * This is required for 3D textures, where otherwise
                         * selecting a single slice for non-layered bindings
                         * fails. It doesn't hurt the other targets.
                         */
                        width = u_minify(res->b.b.width0, level);
                        height = u_minify(res->b.b.height0, level);
                        depth = u_minify(res->b.b.depth0, level);
                        hw_level = 0;
                }

                si_make_texture_descriptor(screen, tex,
                                           false, res->b.b.target,
                                           view->format, swizzle,
                                           hw_level, hw_level,
                                           view->u.tex.first_layer,
                                           view->u.tex.last_layer,
                                           width, height, depth,
                                           desc, NULL);
                si_set_mutable_tex_desc_fields(screen, tex,
                                               &tex->surface.u.legacy.level[level],
                                               level, level,
                                               util_format_get_blockwidth(view->format),
                                               false, desc);
        }
}

static void si_set_shader_image(struct si_context *ctx,
                                unsigned shader,
                                unsigned slot, const struct pipe_image_view *view,
                                bool skip_decompress)
{
        struct si_images *images = &ctx->images[shader];
        struct si_descriptors *descs = si_sampler_and_image_descriptors(ctx, shader);
        struct r600_resource *res;
        unsigned desc_slot = si_get_image_slot(slot);
        uint32_t *desc = descs->list + desc_slot * 8;

        if (!view || !view->resource) {
                si_disable_shader_image(ctx, shader, slot);
                return;
        }

        res = (struct r600_resource *)view->resource;

        if (&images->views[slot] != view)
                util_copy_image_view(&images->views[slot], view);

        si_set_shader_image_desc(ctx, view, skip_decompress, desc);

        if (res->b.b.target == PIPE_BUFFER) {
                images->needs_color_decompress_mask &= ~(1 << slot);
                res->bind_history |= PIPE_BIND_SHADER_IMAGE;
        } else {
                struct r600_texture *tex = (struct r600_texture *)res;
                unsigned level = view->u.tex.level;

                if (color_needs_decompression(tex)) {
                        images->needs_color_decompress_mask |= 1 << slot;
                } else {
                        images->needs_color_decompress_mask &= ~(1 << slot);
                }

                if (vi_dcc_enabled(tex, level) &&
                    p_atomic_read(&tex->framebuffers_bound))
                        ctx->need_check_render_feedback = true;
        }

        images->enabled_mask |= 1u << slot;
        ctx->descriptors_dirty |= 1u << si_sampler_and_image_descriptors_idx(shader);

        /* Since this can flush, it must be done after enabled_mask is updated. */
        si_sampler_view_add_buffer(ctx, &res->b.b,
                                   (view->access & PIPE_IMAGE_ACCESS_WRITE) ?
                                   RADEON_USAGE_READWRITE : RADEON_USAGE_READ,
                                   false, true);
}

static void
si_set_shader_images(struct pipe_context *pipe,
                     enum pipe_shader_type shader,
                     unsigned start_slot, unsigned count,
                     const struct pipe_image_view *views)
{
        struct si_context *ctx = (struct si_context *)pipe;
        unsigned i, slot;

        assert(shader < SI_NUM_SHADERS);

        if (!count)
                return;

        assert(start_slot + count <= SI_NUM_IMAGES);

        if (views) {
                for (i = 0, slot = start_slot; i < count; ++i, ++slot)
                        si_set_shader_image(ctx, shader, slot, &views[i], false);
        } else {
                for (i = 0, slot = start_slot; i < count; ++i, ++slot)
                        si_set_shader_image(ctx, shader, slot, NULL, false);
        }

        si_update_shader_needs_decompress_mask(ctx, shader);
}

static void
si_images_update_needs_color_decompress_mask(struct si_images *images)
{
        unsigned mask = images->enabled_mask;

        while (mask) {
                int i = u_bit_scan(&mask);
                struct pipe_resource *res = images->views[i].resource;

                if (res && res->target != PIPE_BUFFER) {
                        struct r600_texture *rtex = (struct r600_texture *)res;

                        if (color_needs_decompression(rtex)) {
                                images->needs_color_decompress_mask |= 1 << i;
                        } else {
                                images->needs_color_decompress_mask &= ~(1 << i);
                        }
                }
        }
}

/* SAMPLER STATES */

static void si_bind_sampler_states(struct pipe_context *ctx,
                                   enum pipe_shader_type shader,
                                   unsigned start, unsigned count, void **states)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_samplers *samplers = &sctx->samplers[shader];
        struct si_descriptors *desc = si_sampler_and_image_descriptors(sctx, shader);
        struct si_sampler_state **sstates = (struct si_sampler_state**)states;
        int i;

        if (!count || shader >= SI_NUM_SHADERS)
                return;

        for (i = 0; i < count; i++) {
                unsigned slot = start + i;
                unsigned desc_slot = si_get_sampler_slot(slot);

                if (!sstates[i] ||
                    sstates[i] == samplers->sampler_states[slot])
                        continue;

#ifdef DEBUG
                assert(sstates[i]->magic == SI_SAMPLER_STATE_MAGIC);
#endif
                samplers->sampler_states[slot] = sstates[i];

                /* If FMASK is bound, don't overwrite it.
                 * The sampler state will be set after FMASK is unbound.
                 */
                struct si_sampler_view *sview =
                        (struct si_sampler_view *)samplers->views[slot];

                struct r600_texture *tex = NULL;

                if (sview && sview->base.texture &&
                    sview->base.texture->target != PIPE_BUFFER)
                        tex = (struct r600_texture *)sview->base.texture;

                if (tex && tex->fmask.size)
                        continue;

                si_set_sampler_state_desc(sstates[i], sview, tex,
                                          desc->list + desc_slot * 16 + 12);

                sctx->descriptors_dirty |= 1u << si_sampler_and_image_descriptors_idx(shader);
        }
}

/* BUFFER RESOURCES */

static void si_init_buffer_resources(struct si_buffer_resources *buffers,
                                     struct si_descriptors *descs,
                                     unsigned num_buffers,
                                     unsigned shader_userdata_index,
                                     enum radeon_bo_usage shader_usage,
                                     enum radeon_bo_usage shader_usage_constbuf,
                                     enum radeon_bo_priority priority,
                                     enum radeon_bo_priority priority_constbuf)
{
        buffers->shader_usage = shader_usage;
        buffers->shader_usage_constbuf = shader_usage_constbuf;
        buffers->priority = priority;
        buffers->priority_constbuf = priority_constbuf;
        buffers->buffers = CALLOC(num_buffers, sizeof(struct pipe_resource*));

        si_init_descriptors(descs, shader_userdata_index, 4, num_buffers);
}

static void si_release_buffer_resources(struct si_buffer_resources *buffers,
                                        struct si_descriptors *descs)
{
        int i;

        for (i = 0; i < descs->num_elements; i++) {
                pipe_resource_reference(&buffers->buffers[i], NULL);
        }

        FREE(buffers->buffers);
}

static void si_buffer_resources_begin_new_cs(struct si_context *sctx,
                                             struct si_buffer_resources *buffers)
{
        unsigned mask = buffers->enabled_mask;

        /* Add buffers to the CS. */
        while (mask) {
                int i = u_bit_scan(&mask);

                radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
                        r600_resource(buffers->buffers[i]),
                        i < SI_NUM_SHADER_BUFFERS ? buffers->shader_usage :
                                                    buffers->shader_usage_constbuf,
                        i < SI_NUM_SHADER_BUFFERS ? buffers->priority :
                                                    buffers->priority_constbuf);
        }
}

static void si_get_buffer_from_descriptors(struct si_buffer_resources *buffers,
                                           struct si_descriptors *descs,
                                           unsigned idx, struct pipe_resource **buf,
                                           unsigned *offset, unsigned *size)
{
        pipe_resource_reference(buf, buffers->buffers[idx]);
        if (*buf) {
                struct r600_resource *res = r600_resource(*buf);
                const uint32_t *desc = descs->list + idx * 4;
                uint64_t va;

                *size = desc[2];

                assert(G_008F04_STRIDE(desc[1]) == 0);
                va = ((uint64_t)desc[1] << 32) | desc[0];

                assert(va >= res->gpu_address && va + *size <= res->gpu_address + res->bo_size);
                *offset = va - res->gpu_address;
        }
}

/* VERTEX BUFFERS */

static void si_vertex_buffers_begin_new_cs(struct si_context *sctx)
{
        struct si_descriptors *desc = &sctx->vertex_buffers;
        int count = sctx->vertex_elements ? sctx->vertex_elements->count : 0;
        int i;

        for (i = 0; i < count; i++) {
                int vb = sctx->vertex_elements->vertex_buffer_index[i];

                if (vb >= ARRAY_SIZE(sctx->vertex_buffer))
                        continue;
                if (!sctx->vertex_buffer[vb].buffer.resource)
                        continue;

                radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
                                      (struct r600_resource*)sctx->vertex_buffer[vb].buffer.resource,
                                      RADEON_USAGE_READ, RADEON_PRIO_VERTEX_BUFFER);
        }

        if (!desc->buffer)
                return;
        radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
                              desc->buffer, RADEON_USAGE_READ,
                              RADEON_PRIO_DESCRIPTORS);
}

bool si_upload_vertex_buffer_descriptors(struct si_context *sctx)
{
        struct si_vertex_elements *velems = sctx->vertex_elements;
        struct si_descriptors *desc = &sctx->vertex_buffers;
        unsigned i, count;
        unsigned desc_list_byte_size;
        unsigned first_vb_use_mask;
        uint32_t *ptr;

        if (!sctx->vertex_buffers_dirty || !velems)
                return true;

        count = velems->count;

        if (!count)
                return true;

        desc_list_byte_size = velems->desc_list_byte_size;
        first_vb_use_mask = velems->first_vb_use_mask;

        /* Vertex buffer descriptors are the only ones which are uploaded
         * directly through a staging buffer and don't go through
         * the fine-grained upload path.
         */
        unsigned buffer_offset = 0;
        u_upload_alloc(sctx->b.b.const_uploader, 0,
                       desc_list_byte_size,
                       si_optimal_tcc_alignment(sctx, desc_list_byte_size),
                       &buffer_offset,
                       (struct pipe_resource**)&desc->buffer, (void**)&ptr);
        if (!desc->buffer) {
                desc->gpu_address = 0;
                return false;
        }

        desc->gpu_address = desc->buffer->gpu_address + buffer_offset;
        desc->list = ptr;
        radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
                              desc->buffer, RADEON_USAGE_READ,
                              RADEON_PRIO_DESCRIPTORS);

        assert(count <= SI_MAX_ATTRIBS);

        for (i = 0; i < count; i++) {
                struct pipe_vertex_buffer *vb;
                struct r600_resource *rbuffer;
                unsigned vbo_index = velems->vertex_buffer_index[i];
                uint32_t *desc = &ptr[i*4];

                vb = &sctx->vertex_buffer[vbo_index];
                rbuffer = (struct r600_resource*)vb->buffer.resource;
                if (!rbuffer) {
                        memset(desc, 0, 16);
                        continue;
                }

                int offset = (int)vb->buffer_offset + (int)velems->src_offset[i];
                int64_t va = (int64_t)rbuffer->gpu_address + offset;
                assert(va > 0);

                int64_t num_records = (int64_t)rbuffer->b.b.width0 - offset;
                if (sctx->b.chip_class != VI && vb->stride) {
                        /* Round up by rounding down and adding 1 */
                        num_records = (num_records - velems->format_size[i]) /
                                      vb->stride + 1;
                }
                assert(num_records >= 0 && num_records <= UINT_MAX);

                desc[0] = va;
                desc[1] = S_008F04_BASE_ADDRESS_HI(va >> 32) |
                          S_008F04_STRIDE(vb->stride);
                desc[2] = num_records;
                desc[3] = velems->rsrc_word3[i];

                if (first_vb_use_mask & (1 << i)) {
                        radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
                                              (struct r600_resource*)vb->buffer.resource,
                                              RADEON_USAGE_READ, RADEON_PRIO_VERTEX_BUFFER);
                }
        }

        /* Don't flush the const cache. It would have a very negative effect
         * on performance (confirmed by testing). New descriptors are always
         * uploaded to a fresh new buffer, so I don't think flushing the const
         * cache is needed. */
        si_mark_atom_dirty(sctx, &sctx->shader_pointers.atom);
        sctx->vertex_buffers_dirty = false;
        sctx->vertex_buffer_pointer_dirty = true;
        sctx->prefetch_L2_mask |= SI_PREFETCH_VBO_DESCRIPTORS;
        return true;
}


/* CONSTANT BUFFERS */

static unsigned
si_const_and_shader_buffer_descriptors_idx(unsigned shader)
{
        return SI_DESCS_FIRST_SHADER + shader * SI_NUM_SHADER_DESCS +
               SI_SHADER_DESCS_CONST_AND_SHADER_BUFFERS;
}

static struct si_descriptors *
si_const_and_shader_buffer_descriptors(struct si_context *sctx, unsigned shader)
{
        return &sctx->descriptors[si_const_and_shader_buffer_descriptors_idx(shader)];
}

void si_upload_const_buffer(struct si_context *sctx, struct r600_resource **rbuffer,
                            const uint8_t *ptr, unsigned size, uint32_t *const_offset)
{
        void *tmp;

        u_upload_alloc(sctx->b.b.const_uploader, 0, size,
                       si_optimal_tcc_alignment(sctx, size),
                       const_offset,
                       (struct pipe_resource**)rbuffer, &tmp);
        if (*rbuffer)
                util_memcpy_cpu_to_le32(tmp, ptr, size);
}

static void si_set_constant_buffer(struct si_context *sctx,
                                   struct si_buffer_resources *buffers,
                                   unsigned descriptors_idx,
                                   uint slot, const struct pipe_constant_buffer *input)
{
        struct si_descriptors *descs = &sctx->descriptors[descriptors_idx];
        assert(slot < descs->num_elements);
        pipe_resource_reference(&buffers->buffers[slot], NULL);

        /* CIK cannot unbind a constant buffer (S_BUFFER_LOAD is buggy
         * with a NULL buffer). We need to use a dummy buffer instead. */
        if (sctx->b.chip_class == CIK &&
            (!input || (!input->buffer && !input->user_buffer)))
                input = &sctx->null_const_buf;

        if (input && (input->buffer || input->user_buffer)) {
                struct pipe_resource *buffer = NULL;
                uint64_t va;

                /* Upload the user buffer if needed. */
                if (input->user_buffer) {
                        unsigned buffer_offset;

                        si_upload_const_buffer(sctx,
                                               (struct r600_resource**)&buffer, input->user_buffer,
                                               input->buffer_size, &buffer_offset);
                        if (!buffer) {
                                /* Just unbind on failure. */
                                si_set_constant_buffer(sctx, buffers, descriptors_idx, slot, NULL);
                                return;
                        }
                        va = r600_resource(buffer)->gpu_address + buffer_offset;
                } else {
                        pipe_resource_reference(&buffer, input->buffer);
                        va = r600_resource(buffer)->gpu_address + input->buffer_offset;
                        /* Only track usage for non-user buffers. */
                        r600_resource(buffer)->bind_history |= PIPE_BIND_CONSTANT_BUFFER;
                }

                /* Set the descriptor. */
                uint32_t *desc = descs->list + slot*4;
                desc[0] = va;
                desc[1] = S_008F04_BASE_ADDRESS_HI(va >> 32) |
                          S_008F04_STRIDE(0);
                desc[2] = input->buffer_size;
                desc[3] = S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
                          S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
                          S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
                          S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
                          S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
                          S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32);

                buffers->buffers[slot] = buffer;
                radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx,
                                                    (struct r600_resource*)buffer,
                                                    buffers->shader_usage_constbuf,
                                                    buffers->priority_constbuf, true);
                buffers->enabled_mask |= 1u << slot;
        } else {
                /* Clear the descriptor. */
                memset(descs->list + slot*4, 0, sizeof(uint32_t) * 4);
                buffers->enabled_mask &= ~(1u << slot);
        }

        sctx->descriptors_dirty |= 1u << descriptors_idx;
}

void si_set_rw_buffer(struct si_context *sctx,
                      uint slot, const struct pipe_constant_buffer *input)
{
        si_set_constant_buffer(sctx, &sctx->rw_buffers,
                                                SI_DESCS_RW_BUFFERS, slot, input);
}

static void si_pipe_set_constant_buffer(struct pipe_context *ctx,
                                        enum pipe_shader_type shader, uint slot,
                                        const struct pipe_constant_buffer *input)
{
        struct si_context *sctx = (struct si_context *)ctx;

        if (shader >= SI_NUM_SHADERS)
                return;

        slot = si_get_constbuf_slot(slot);
        si_set_constant_buffer(sctx, &sctx->const_and_shader_buffers[shader],
                               si_const_and_shader_buffer_descriptors_idx(shader),
                               slot, input);
}

void si_get_pipe_constant_buffer(struct si_context *sctx, uint shader,
                                 uint slot, struct pipe_constant_buffer *cbuf)
{
        cbuf->user_buffer = NULL;
        si_get_buffer_from_descriptors(
                &sctx->const_and_shader_buffers[shader],
                si_const_and_shader_buffer_descriptors(sctx, shader),
                si_get_constbuf_slot(slot),
                &cbuf->buffer, &cbuf->buffer_offset, &cbuf->buffer_size);
}

/* SHADER BUFFERS */

static void si_set_shader_buffers(struct pipe_context *ctx,
                                  enum pipe_shader_type shader,
                                  unsigned start_slot, unsigned count,
                                  const struct pipe_shader_buffer *sbuffers)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_buffer_resources *buffers = &sctx->const_and_shader_buffers[shader];
        struct si_descriptors *descs = si_const_and_shader_buffer_descriptors(sctx, shader);
        unsigned i;

        assert(start_slot + count <= SI_NUM_SHADER_BUFFERS);

        for (i = 0; i < count; ++i) {
                const struct pipe_shader_buffer *sbuffer = sbuffers ? &sbuffers[i] : NULL;
                struct r600_resource *buf;
                unsigned slot = si_get_shaderbuf_slot(start_slot + i);
                uint32_t *desc = descs->list + slot * 4;
                uint64_t va;

                if (!sbuffer || !sbuffer->buffer) {
                        pipe_resource_reference(&buffers->buffers[slot], NULL);
                        memset(desc, 0, sizeof(uint32_t) * 4);
                        buffers->enabled_mask &= ~(1u << slot);
                        sctx->descriptors_dirty |=
                                1u << si_const_and_shader_buffer_descriptors_idx(shader);
                        continue;
                }

                buf = (struct r600_resource *)sbuffer->buffer;
                va = buf->gpu_address + sbuffer->buffer_offset;

                desc[0] = va;
                desc[1] = S_008F04_BASE_ADDRESS_HI(va >> 32) |
                          S_008F04_STRIDE(0);
                desc[2] = sbuffer->buffer_size;
                desc[3] = S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
                          S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
                          S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
                          S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
                          S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
                          S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32);

                pipe_resource_reference(&buffers->buffers[slot], &buf->b.b);
                radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx, buf,
                                                    buffers->shader_usage,
                                                    buffers->priority, true);
                buf->bind_history |= PIPE_BIND_SHADER_BUFFER;

                buffers->enabled_mask |= 1u << slot;
                sctx->descriptors_dirty |=
                        1u << si_const_and_shader_buffer_descriptors_idx(shader);

                util_range_add(&buf->valid_buffer_range, sbuffer->buffer_offset,
                               sbuffer->buffer_offset + sbuffer->buffer_size);
        }
}

void si_get_shader_buffers(struct si_context *sctx,
                           enum pipe_shader_type shader,
                           uint start_slot, uint count,
                           struct pipe_shader_buffer *sbuf)
{
        struct si_buffer_resources *buffers = &sctx->const_and_shader_buffers[shader];
        struct si_descriptors *descs = si_const_and_shader_buffer_descriptors(sctx, shader);

        for (unsigned i = 0; i < count; ++i) {
                si_get_buffer_from_descriptors(
                        buffers, descs,
                        si_get_shaderbuf_slot(start_slot + i),
                        &sbuf[i].buffer, &sbuf[i].buffer_offset,
                        &sbuf[i].buffer_size);
        }
}

/* RING BUFFERS */

void si_set_ring_buffer(struct pipe_context *ctx, uint slot,
                        struct pipe_resource *buffer,
                        unsigned stride, unsigned num_records,
                        bool add_tid, bool swizzle,
                        unsigned element_size, unsigned index_stride, uint64_t offset)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_buffer_resources *buffers = &sctx->rw_buffers;
        struct si_descriptors *descs = &sctx->descriptors[SI_DESCS_RW_BUFFERS];

        /* The stride field in the resource descriptor has 14 bits */
        assert(stride < (1 << 14));

        assert(slot < descs->num_elements);
        pipe_resource_reference(&buffers->buffers[slot], NULL);

        if (buffer) {
                uint64_t va;

                va = r600_resource(buffer)->gpu_address + offset;

                switch (element_size) {
                default:
                        assert(!"Unsupported ring buffer element size");
                case 0:
                case 2:
                        element_size = 0;
                        break;
                case 4:
                        element_size = 1;
                        break;
                case 8:
                        element_size = 2;
                        break;
                case 16:
                        element_size = 3;
                        break;
                }

                switch (index_stride) {
                default:
                        assert(!"Unsupported ring buffer index stride");
                case 0:
                case 8:
                        index_stride = 0;
                        break;
                case 16:
                        index_stride = 1;
                        break;
                case 32:
                        index_stride = 2;
                        break;
                case 64:
                        index_stride = 3;
                        break;
                }

                if (sctx->b.chip_class >= VI && stride)
                        num_records *= stride;

                /* Set the descriptor. */
                uint32_t *desc = descs->list + slot*4;
                desc[0] = va;
                desc[1] = S_008F04_BASE_ADDRESS_HI(va >> 32) |
                          S_008F04_STRIDE(stride) |
                          S_008F04_SWIZZLE_ENABLE(swizzle);
                desc[2] = num_records;
                desc[3] = S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
                          S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
                          S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
                          S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
                          S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
                          S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32) |
                          S_008F0C_INDEX_STRIDE(index_stride) |
                          S_008F0C_ADD_TID_ENABLE(add_tid);

                if (sctx->b.chip_class >= GFX9)
                        assert(!swizzle || element_size == 1); /* always 4 bytes on GFX9 */
                else
                        desc[3] |= S_008F0C_ELEMENT_SIZE(element_size);

                pipe_resource_reference(&buffers->buffers[slot], buffer);
                radeon_add_to_buffer_list(&sctx->b, &sctx->b.gfx,
                                      (struct r600_resource*)buffer,
                                      buffers->shader_usage, buffers->priority);
                buffers->enabled_mask |= 1u << slot;
        } else {
                /* Clear the descriptor. */
                memset(descs->list + slot*4, 0, sizeof(uint32_t) * 4);
                buffers->enabled_mask &= ~(1u << slot);
        }

        sctx->descriptors_dirty |= 1u << SI_DESCS_RW_BUFFERS;
}

static void si_desc_reset_buffer_offset(struct pipe_context *ctx,
                                        uint32_t *desc, uint64_t old_buf_va,
                                        struct pipe_resource *new_buf)
{
        /* Retrieve the buffer offset from the descriptor. */
        uint64_t old_desc_va = si_desc_extract_buffer_address(desc);

        assert(old_buf_va <= old_desc_va);
        uint64_t offset_within_buffer = old_desc_va - old_buf_va;

        /* Update the descriptor. */
        si_set_buf_desc_address(r600_resource(new_buf), offset_within_buffer,
                                desc);
}

/* INTERNAL CONST BUFFERS */

static void si_set_polygon_stipple(struct pipe_context *ctx,
                                   const struct pipe_poly_stipple *state)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct pipe_constant_buffer cb = {};
        unsigned stipple[32];
        int i;

        for (i = 0; i < 32; i++)
                stipple[i] = util_bitreverse(state->stipple[i]);

        cb.user_buffer = stipple;
        cb.buffer_size = sizeof(stipple);

        si_set_rw_buffer(sctx, SI_PS_CONST_POLY_STIPPLE, &cb);
}

/* TEXTURE METADATA ENABLE/DISABLE */

static void
si_resident_handles_update_needs_color_decompress(struct si_context *sctx)
{
        util_dynarray_clear(&sctx->resident_tex_needs_color_decompress);
        util_dynarray_clear(&sctx->resident_img_needs_color_decompress);

        util_dynarray_foreach(&sctx->resident_tex_handles,
                              struct si_texture_handle *, tex_handle) {
                struct pipe_resource *res = (*tex_handle)->view->texture;
                struct r600_texture *rtex;

                if (!res || res->target == PIPE_BUFFER)
                        continue;

                rtex = (struct r600_texture *)res;
                if (!color_needs_decompression(rtex))
                        continue;

                util_dynarray_append(&sctx->resident_tex_needs_color_decompress,
                                     struct si_texture_handle *, *tex_handle);
        }

        util_dynarray_foreach(&sctx->resident_img_handles,
                              struct si_image_handle *, img_handle) {
                struct pipe_image_view *view = &(*img_handle)->view;
                struct pipe_resource *res = view->resource;
                struct r600_texture *rtex;

                if (!res || res->target == PIPE_BUFFER)
                        continue;

                rtex = (struct r600_texture *)res;
                if (!color_needs_decompression(rtex))
                        continue;

                util_dynarray_append(&sctx->resident_img_needs_color_decompress,
                                     struct si_image_handle *, *img_handle);
        }
}

/* CMASK can be enabled (for fast clear) and disabled (for texture export)
 * while the texture is bound, possibly by a different context. In that case,
 * call this function to update needs_*_decompress_masks.
 */
void si_update_needs_color_decompress_masks(struct si_context *sctx)
{
        for (int i = 0; i < SI_NUM_SHADERS; ++i) {
                si_samplers_update_needs_color_decompress_mask(&sctx->samplers[i]);
                si_images_update_needs_color_decompress_mask(&sctx->images[i]);
                si_update_shader_needs_decompress_mask(sctx, i);
        }

        si_resident_handles_update_needs_color_decompress(sctx);
}

/* BUFFER DISCARD/INVALIDATION */

/** Reset descriptors of buffer resources after \p buf has been invalidated. */
static void si_reset_buffer_resources(struct si_context *sctx,
                                      struct si_buffer_resources *buffers,
                                      unsigned descriptors_idx,
                                      unsigned slot_mask,
                                      struct pipe_resource *buf,
                                      uint64_t old_va,
                                      enum radeon_bo_usage usage,
                                      enum radeon_bo_priority priority)
{
        struct si_descriptors *descs = &sctx->descriptors[descriptors_idx];
        unsigned mask = buffers->enabled_mask & slot_mask;

        while (mask) {
                unsigned i = u_bit_scan(&mask);
                if (buffers->buffers[i] == buf) {
                        si_desc_reset_buffer_offset(&sctx->b.b,
                                                    descs->list + i*4,
                                                    old_va, buf);
                        sctx->descriptors_dirty |= 1u << descriptors_idx;

                        radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx,
                                                            (struct r600_resource *)buf,
                                                            usage, priority, true);
                }
        }
}

static void si_rebind_buffer(struct pipe_context *ctx, struct pipe_resource *buf,
                             uint64_t old_va)
{
        struct si_context *sctx = (struct si_context*)ctx;
        struct r600_resource *rbuffer = r600_resource(buf);
        unsigned i, shader;
        unsigned num_elems = sctx->vertex_elements ?
                                       sctx->vertex_elements->count : 0;

        /* We changed the buffer, now we need to bind it where the old one
         * was bound. This consists of 2 things:
         *   1) Updating the resource descriptor and dirtying it.
         *   2) Adding a relocation to the CS, so that it's usable.
         */

        /* Vertex buffers. */
        if (rbuffer->bind_history & PIPE_BIND_VERTEX_BUFFER) {
                for (i = 0; i < num_elems; i++) {
                        int vb = sctx->vertex_elements->vertex_buffer_index[i];

                        if (vb >= ARRAY_SIZE(sctx->vertex_buffer))
                                continue;
                        if (!sctx->vertex_buffer[vb].buffer.resource)
                                continue;

                        if (sctx->vertex_buffer[vb].buffer.resource == buf) {
                                sctx->vertex_buffers_dirty = true;
                                break;
                        }
                }
        }

        /* Streamout buffers. (other internal buffers can't be invalidated) */
        if (rbuffer->bind_history & PIPE_BIND_STREAM_OUTPUT) {
                for (i = SI_VS_STREAMOUT_BUF0; i <= SI_VS_STREAMOUT_BUF3; i++) {
                        struct si_buffer_resources *buffers = &sctx->rw_buffers;
                        struct si_descriptors *descs =
                                &sctx->descriptors[SI_DESCS_RW_BUFFERS];

                        if (buffers->buffers[i] != buf)
                                continue;

                        si_desc_reset_buffer_offset(ctx, descs->list + i*4,
                                                    old_va, buf);
                        sctx->descriptors_dirty |= 1u << SI_DESCS_RW_BUFFERS;

                        radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx,
                                                            rbuffer, buffers->shader_usage,
                                                            RADEON_PRIO_SHADER_RW_BUFFER,
                                                            true);

                        /* Update the streamout state. */
                        if (sctx->streamout.begin_emitted)
                                si_emit_streamout_end(sctx);
                        sctx->streamout.append_bitmask =
                                        sctx->streamout.enabled_mask;
                        si_streamout_buffers_dirty(sctx);
                }
        }

        /* Constant and shader buffers. */
        if (rbuffer->bind_history & PIPE_BIND_CONSTANT_BUFFER) {
                for (shader = 0; shader < SI_NUM_SHADERS; shader++)
                        si_reset_buffer_resources(sctx, &sctx->const_and_shader_buffers[shader],
                                                  si_const_and_shader_buffer_descriptors_idx(shader),
                                                  u_bit_consecutive(SI_NUM_SHADER_BUFFERS, SI_NUM_CONST_BUFFERS),
                                                  buf, old_va,
                                                  sctx->const_and_shader_buffers[shader].shader_usage_constbuf,
                                                  sctx->const_and_shader_buffers[shader].priority_constbuf);
        }

        if (rbuffer->bind_history & PIPE_BIND_SHADER_BUFFER) {
                for (shader = 0; shader < SI_NUM_SHADERS; shader++)
                        si_reset_buffer_resources(sctx, &sctx->const_and_shader_buffers[shader],
                                                  si_const_and_shader_buffer_descriptors_idx(shader),
                                                  u_bit_consecutive(0, SI_NUM_SHADER_BUFFERS),
                                                  buf, old_va,
                                                  sctx->const_and_shader_buffers[shader].shader_usage,
                                                  sctx->const_and_shader_buffers[shader].priority);
        }

        if (rbuffer->bind_history & PIPE_BIND_SAMPLER_VIEW) {
                /* Texture buffers - update bindings. */
                for (shader = 0; shader < SI_NUM_SHADERS; shader++) {
                        struct si_samplers *samplers = &sctx->samplers[shader];
                        struct si_descriptors *descs =
                                si_sampler_and_image_descriptors(sctx, shader);
                        unsigned mask = samplers->enabled_mask;

                        while (mask) {
                                unsigned i = u_bit_scan(&mask);
                                if (samplers->views[i]->texture == buf) {
                                        unsigned desc_slot = si_get_sampler_slot(i);

                                        si_desc_reset_buffer_offset(ctx,
                                                                    descs->list +
                                                                    desc_slot * 16 + 4,
                                                                    old_va, buf);
                                        sctx->descriptors_dirty |=
                                                1u << si_sampler_and_image_descriptors_idx(shader);

                                        radeon_add_to_buffer_list_check_mem(&sctx->b, &sctx->b.gfx,
                                                                            rbuffer, RADEON_USAGE_READ,
                                                                            RADEON_PRIO_SAMPLER_BUFFER,
                                                                            true);
                                }
                        }
                }
        }

        /* Shader images */
        if (rbuffer->bind_history & PIPE_BIND_SHADER_IMAGE) {
                for (shader = 0; shader < SI_NUM_SHADERS; ++shader) {
                        struct si_images *images = &sctx->images[shader];
                        struct si_descriptors *descs =
                                si_sampler_and_image_descriptors(sctx, shader);
                        unsigned mask = images->enabled_mask;

                        while (mask) {
                                unsigned i = u_bit_scan(&mask);

                                if (images->views[i].resource == buf) {
                                        unsigned desc_slot = si_get_image_slot(i);

                                        if (images->views[i].access & PIPE_IMAGE_ACCESS_WRITE)
                                                si_mark_image_range_valid(&images->views[i]);

                                        si_desc_reset_buffer_offset(
                                                ctx, descs->list + desc_slot * 8 + 4,
                                                old_va, buf);
                                        sctx->descriptors_dirty |=
                                                1u << si_sampler_and_image_descriptors_idx(shader);

                                        radeon_add_to_buffer_list_check_mem(
                                                &sctx->b, &sctx->b.gfx, rbuffer,
                                                RADEON_USAGE_READWRITE,
                                                RADEON_PRIO_SAMPLER_BUFFER, true);
                                }
                        }
                }
        }

        /* Bindless texture handles */
        if (rbuffer->texture_handle_allocated) {
                struct si_descriptors *descs = &sctx->bindless_descriptors;

                util_dynarray_foreach(&sctx->resident_tex_handles,
                                      struct si_texture_handle *, tex_handle) {
                        struct pipe_sampler_view *view = (*tex_handle)->view;
                        unsigned desc_slot = (*tex_handle)->desc_slot;

                        if (view->texture == buf) {
                                si_set_buf_desc_address(rbuffer,
                                                        view->u.buf.offset,
                                                        descs->list +
                                                        desc_slot * 16 + 4);

                                (*tex_handle)->desc_dirty = true;
                                sctx->bindless_descriptors_dirty = true;

                                radeon_add_to_buffer_list_check_mem(
                                        &sctx->b, &sctx->b.gfx, rbuffer,
                                        RADEON_USAGE_READ,
                                        RADEON_PRIO_SAMPLER_BUFFER, true);
                        }
                }
        }

        /* Bindless image handles */
        if (rbuffer->image_handle_allocated) {
                struct si_descriptors *descs = &sctx->bindless_descriptors;

                util_dynarray_foreach(&sctx->resident_img_handles,
                                      struct si_image_handle *, img_handle) {
                        struct pipe_image_view *view = &(*img_handle)->view;
                        unsigned desc_slot = (*img_handle)->desc_slot;

                        if (view->resource == buf) {
                                if (view->access & PIPE_IMAGE_ACCESS_WRITE)
                                        si_mark_image_range_valid(view);

                                si_set_buf_desc_address(rbuffer,
                                                        view->u.buf.offset,
                                                        descs->list +
                                                        desc_slot * 16 + 4);

                                (*img_handle)->desc_dirty = true;
                                sctx->bindless_descriptors_dirty = true;

                                radeon_add_to_buffer_list_check_mem(
                                        &sctx->b, &sctx->b.gfx, rbuffer,
                                        RADEON_USAGE_READWRITE,
                                        RADEON_PRIO_SAMPLER_BUFFER, true);
                        }
                }
        }
}

/* Reallocate a buffer a update all resource bindings where the buffer is
 * bound.
 *
 * This is used to avoid CPU-GPU synchronizations, because it makes the buffer
 * idle by discarding its contents. Apps usually tell us when to do this using
 * map_buffer flags, for example.
 */
static void si_invalidate_buffer(struct pipe_context *ctx, struct pipe_resource *buf)
{
        struct si_context *sctx = (struct si_context*)ctx;
        struct r600_resource *rbuffer = r600_resource(buf);
        uint64_t old_va = rbuffer->gpu_address;

        /* Reallocate the buffer in the same pipe_resource. */
        si_alloc_resource(&sctx->screen->b, rbuffer);

        si_rebind_buffer(ctx, buf, old_va);
}

static void si_upload_bindless_descriptor(struct si_context *sctx,
                                          unsigned desc_slot,
                                          unsigned num_dwords)
{
        struct si_descriptors *desc = &sctx->bindless_descriptors;
        struct radeon_winsys_cs *cs = sctx->b.gfx.cs;
        unsigned desc_slot_offset = desc_slot * 16;
        uint32_t *data;
        uint64_t va;

        data = desc->list + desc_slot_offset;
        va = desc->gpu_address + desc_slot_offset * 4;

        radeon_emit(cs, PKT3(PKT3_WRITE_DATA, 2 + num_dwords, 0));
        radeon_emit(cs, S_370_DST_SEL(V_370_TC_L2) |
                    S_370_WR_CONFIRM(1) |
                    S_370_ENGINE_SEL(V_370_ME));
        radeon_emit(cs, va);
        radeon_emit(cs, va >> 32);
        radeon_emit_array(cs, data, num_dwords);
}

static void si_upload_bindless_descriptors(struct si_context *sctx)
{
        if (!sctx->bindless_descriptors_dirty)
                return;

        /* Wait for graphics/compute to be idle before updating the resident
         * descriptors directly in memory, in case the GPU is using them.
         */
        sctx->b.flags |= SI_CONTEXT_PS_PARTIAL_FLUSH |
                         SI_CONTEXT_CS_PARTIAL_FLUSH;
        si_emit_cache_flush(sctx);

        util_dynarray_foreach(&sctx->resident_tex_handles,
                              struct si_texture_handle *, tex_handle) {
                unsigned desc_slot = (*tex_handle)->desc_slot;

                if (!(*tex_handle)->desc_dirty)
                        continue;

                si_upload_bindless_descriptor(sctx, desc_slot, 16);
                (*tex_handle)->desc_dirty = false;
        }

        util_dynarray_foreach(&sctx->resident_img_handles,
                              struct si_image_handle *, img_handle) {
                unsigned desc_slot = (*img_handle)->desc_slot;

                if (!(*img_handle)->desc_dirty)
                        continue;

                si_upload_bindless_descriptor(sctx, desc_slot, 8);
                (*img_handle)->desc_dirty = false;
        }

        /* Invalidate L1 because it doesn't know that L2 changed. */
        sctx->b.flags |= SI_CONTEXT_INV_SMEM_L1;
        si_emit_cache_flush(sctx);

        sctx->bindless_descriptors_dirty = false;
}

/* Update mutable image descriptor fields of all resident textures. */
static void si_update_bindless_texture_descriptor(struct si_context *sctx,
                                                  struct si_texture_handle *tex_handle)
{
        struct si_sampler_view *sview = (struct si_sampler_view *)tex_handle->view;
        struct si_descriptors *desc = &sctx->bindless_descriptors;
        unsigned desc_slot_offset = tex_handle->desc_slot * 16;
        uint32_t desc_list[16];

        if (sview->base.texture->target == PIPE_BUFFER)
                return;

        memcpy(desc_list, desc->list + desc_slot_offset, sizeof(desc_list));
        si_set_sampler_view_desc(sctx, sview, &tex_handle->sstate,
                                 desc->list + desc_slot_offset);

        if (memcmp(desc_list, desc->list + desc_slot_offset,
                   sizeof(desc_list))) {
                tex_handle->desc_dirty = true;
                sctx->bindless_descriptors_dirty = true;
        }
}

static void si_update_bindless_image_descriptor(struct si_context *sctx,
                                                struct si_image_handle *img_handle)
{
        struct si_descriptors *desc = &sctx->bindless_descriptors;
        unsigned desc_slot_offset = img_handle->desc_slot * 16;
        struct pipe_image_view *view = &img_handle->view;
        uint32_t desc_list[8];

        if (view->resource->target == PIPE_BUFFER)
                return;

        memcpy(desc_list, desc->list + desc_slot_offset,
               sizeof(desc_list));
        si_set_shader_image_desc(sctx, view, true,
                                 desc->list + desc_slot_offset);

        if (memcmp(desc_list, desc->list + desc_slot_offset,
                   sizeof(desc_list))) {
                img_handle->desc_dirty = true;
                sctx->bindless_descriptors_dirty = true;
        }
}

static void si_update_all_resident_texture_descriptors(struct si_context *sctx)
{
        util_dynarray_foreach(&sctx->resident_tex_handles,
                              struct si_texture_handle *, tex_handle) {
                si_update_bindless_texture_descriptor(sctx, *tex_handle);
        }

        util_dynarray_foreach(&sctx->resident_img_handles,
                              struct si_image_handle *, img_handle) {
                si_update_bindless_image_descriptor(sctx, *img_handle);
        }

        si_upload_bindless_descriptors(sctx);
}

/* Update mutable image descriptor fields of all bound textures. */
void si_update_all_texture_descriptors(struct si_context *sctx)
{
        unsigned shader;

        for (shader = 0; shader < SI_NUM_SHADERS; shader++) {
                struct si_samplers *samplers = &sctx->samplers[shader];
                struct si_images *images = &sctx->images[shader];
                unsigned mask;

                /* Images. */
                mask = images->enabled_mask;
                while (mask) {
                        unsigned i = u_bit_scan(&mask);
                        struct pipe_image_view *view = &images->views[i];

                        if (!view->resource ||
                            view->resource->target == PIPE_BUFFER)
                                continue;

                        si_set_shader_image(sctx, shader, i, view, true);
                }

                /* Sampler views. */
                mask = samplers->enabled_mask;
                while (mask) {
                        unsigned i = u_bit_scan(&mask);
                        struct pipe_sampler_view *view = samplers->views[i];

                        if (!view ||
                            !view->texture ||
                            view->texture->target == PIPE_BUFFER)
                                continue;

                        si_set_sampler_view(sctx, shader, i,
                                            samplers->views[i], true);
                }

                si_update_shader_needs_decompress_mask(sctx, shader);
        }

        si_update_all_resident_texture_descriptors(sctx);
}

/* SHADER USER DATA */

static void si_mark_shader_pointers_dirty(struct si_context *sctx,
                                          unsigned shader)
{
        sctx->shader_pointers_dirty |=
                u_bit_consecutive(SI_DESCS_FIRST_SHADER + shader * SI_NUM_SHADER_DESCS,
                                  SI_NUM_SHADER_DESCS);

        if (shader == PIPE_SHADER_VERTEX)
                sctx->vertex_buffer_pointer_dirty = sctx->vertex_buffers.buffer != NULL;

        si_mark_atom_dirty(sctx, &sctx->shader_pointers.atom);
}

static void si_shader_pointers_begin_new_cs(struct si_context *sctx)
{
        sctx->shader_pointers_dirty = u_bit_consecutive(0, SI_NUM_DESCS);
        sctx->vertex_buffer_pointer_dirty = sctx->vertex_buffers.buffer != NULL;
        si_mark_atom_dirty(sctx, &sctx->shader_pointers.atom);
        sctx->graphics_bindless_pointer_dirty = sctx->bindless_descriptors.buffer != NULL;
        sctx->compute_bindless_pointer_dirty = sctx->bindless_descriptors.buffer != NULL;
}

/* Set a base register address for user data constants in the given shader.
 * This assigns a mapping from PIPE_SHADER_* to SPI_SHADER_USER_DATA_*.
 */
static void si_set_user_data_base(struct si_context *sctx,
                                  unsigned shader, uint32_t new_base)
{
        uint32_t *base = &sctx->shader_pointers.sh_base[shader];

        if (*base != new_base) {
                *base = new_base;

                if (new_base) {
                        si_mark_shader_pointers_dirty(sctx, shader);

                        if (shader == PIPE_SHADER_VERTEX)
                                sctx->last_vs_state = ~0;
                }
        }
}

/* This must be called when these shaders are changed from non-NULL to NULL
 * and vice versa:
 * - geometry shader
 * - tessellation control shader
 * - tessellation evaluation shader
 */
void si_shader_change_notify(struct si_context *sctx)
{
        /* VS can be bound as VS, ES, or LS. */
        if (sctx->tes_shader.cso) {
                if (sctx->b.chip_class >= GFX9) {
                        si_set_user_data_base(sctx, PIPE_SHADER_VERTEX,
                                              R_00B430_SPI_SHADER_USER_DATA_LS_0);
                } else {
                        si_set_user_data_base(sctx, PIPE_SHADER_VERTEX,
                                              R_00B530_SPI_SHADER_USER_DATA_LS_0);
                }
        } else if (sctx->gs_shader.cso) {
                si_set_user_data_base(sctx, PIPE_SHADER_VERTEX,
                                      R_00B330_SPI_SHADER_USER_DATA_ES_0);
        } else {
                si_set_user_data_base(sctx, PIPE_SHADER_VERTEX,
                                      R_00B130_SPI_SHADER_USER_DATA_VS_0);
        }

        /* TES can be bound as ES, VS, or not bound. */
        if (sctx->tes_shader.cso) {
                if (sctx->gs_shader.cso)
                        si_set_user_data_base(sctx, PIPE_SHADER_TESS_EVAL,
                                              R_00B330_SPI_SHADER_USER_DATA_ES_0);
                else
                        si_set_user_data_base(sctx, PIPE_SHADER_TESS_EVAL,
                                              R_00B130_SPI_SHADER_USER_DATA_VS_0);
        } else {
                si_set_user_data_base(sctx, PIPE_SHADER_TESS_EVAL, 0);
        }
}

static void si_emit_shader_pointer_head(struct radeon_winsys_cs *cs,
                                        struct si_descriptors *desc,
                                        unsigned sh_base,
                                        unsigned pointer_count)
{
        radeon_emit(cs, PKT3(PKT3_SET_SH_REG, pointer_count * 2, 0));
        radeon_emit(cs, (sh_base + desc->shader_userdata_offset - SI_SH_REG_OFFSET) >> 2);
}

static void si_emit_shader_pointer_body(struct radeon_winsys_cs *cs,
                                        struct si_descriptors *desc)
{
        uint64_t va = desc->gpu_address;

        radeon_emit(cs, va);
        radeon_emit(cs, va >> 32);
}

static void si_emit_shader_pointer(struct si_context *sctx,
                                   struct si_descriptors *desc,
                                   unsigned sh_base)
{
        struct radeon_winsys_cs *cs = sctx->b.gfx.cs;

        si_emit_shader_pointer_head(cs, desc, sh_base, 1);
        si_emit_shader_pointer_body(cs, desc);
}

static void si_emit_consecutive_shader_pointers(struct si_context *sctx,
                                                unsigned pointer_mask,
                                                unsigned sh_base)
{
        if (!sh_base)
                return;

        struct radeon_winsys_cs *cs = sctx->b.gfx.cs;
        unsigned mask = sctx->shader_pointers_dirty & pointer_mask;

        while (mask) {
                int start, count;
                u_bit_scan_consecutive_range(&mask, &start, &count);

                struct si_descriptors *descs = &sctx->descriptors[start];

                si_emit_shader_pointer_head(cs, descs, sh_base, count);
                for (int i = 0; i < count; i++)
                        si_emit_shader_pointer_body(cs, descs + i);
        }
}

static void si_emit_global_shader_pointers(struct si_context *sctx,
                                           struct si_descriptors *descs)
{
        if (sctx->b.chip_class == GFX9) {
                /* Broadcast it to all shader stages. */
                si_emit_shader_pointer(sctx, descs,
                                       R_00B530_SPI_SHADER_USER_DATA_COMMON_0);
                return;
        }

        si_emit_shader_pointer(sctx, descs,
                               R_00B030_SPI_SHADER_USER_DATA_PS_0);
        si_emit_shader_pointer(sctx, descs,
                               R_00B130_SPI_SHADER_USER_DATA_VS_0);
        si_emit_shader_pointer(sctx, descs,
                               R_00B330_SPI_SHADER_USER_DATA_ES_0);
        si_emit_shader_pointer(sctx, descs,
                               R_00B230_SPI_SHADER_USER_DATA_GS_0);
        si_emit_shader_pointer(sctx, descs,
                               R_00B430_SPI_SHADER_USER_DATA_HS_0);
        si_emit_shader_pointer(sctx, descs,
                               R_00B530_SPI_SHADER_USER_DATA_LS_0);
}

void si_emit_graphics_shader_pointers(struct si_context *sctx,
                                      struct r600_atom *atom)
{
        uint32_t *sh_base = sctx->shader_pointers.sh_base;

        if (sctx->shader_pointers_dirty & (1 << SI_DESCS_RW_BUFFERS)) {
                si_emit_global_shader_pointers(sctx,
                                               &sctx->descriptors[SI_DESCS_RW_BUFFERS]);
        }

        si_emit_consecutive_shader_pointers(sctx, SI_DESCS_SHADER_MASK(VERTEX),
                                            sh_base[PIPE_SHADER_VERTEX]);
        si_emit_consecutive_shader_pointers(sctx, SI_DESCS_SHADER_MASK(TESS_CTRL),
                                            sh_base[PIPE_SHADER_TESS_CTRL]);
        si_emit_consecutive_shader_pointers(sctx, SI_DESCS_SHADER_MASK(TESS_EVAL),
                                            sh_base[PIPE_SHADER_TESS_EVAL]);
        si_emit_consecutive_shader_pointers(sctx, SI_DESCS_SHADER_MASK(GEOMETRY),
                                            sh_base[PIPE_SHADER_GEOMETRY]);
        si_emit_consecutive_shader_pointers(sctx, SI_DESCS_SHADER_MASK(FRAGMENT),
                                            sh_base[PIPE_SHADER_FRAGMENT]);

        sctx->shader_pointers_dirty &=
                ~u_bit_consecutive(SI_DESCS_RW_BUFFERS, SI_DESCS_FIRST_COMPUTE);

        if (sctx->vertex_buffer_pointer_dirty) {
                si_emit_shader_pointer(sctx, &sctx->vertex_buffers,
                                       sh_base[PIPE_SHADER_VERTEX]);
                sctx->vertex_buffer_pointer_dirty = false;
        }

        if (sctx->graphics_bindless_pointer_dirty) {
                si_emit_global_shader_pointers(sctx,
                                               &sctx->bindless_descriptors);
                sctx->graphics_bindless_pointer_dirty = false;
        }
}

void si_emit_compute_shader_pointers(struct si_context *sctx)
{
        unsigned base = R_00B900_COMPUTE_USER_DATA_0;

        si_emit_consecutive_shader_pointers(sctx, SI_DESCS_SHADER_MASK(COMPUTE),
                                            R_00B900_COMPUTE_USER_DATA_0);
        sctx->shader_pointers_dirty &= ~SI_DESCS_SHADER_MASK(COMPUTE);

        if (sctx->compute_bindless_pointer_dirty) {
                si_emit_shader_pointer(sctx, &sctx->bindless_descriptors, base);
                sctx->compute_bindless_pointer_dirty = false;
        }
}

/* BINDLESS */

static void si_init_bindless_descriptors(struct si_context *sctx,
                                         struct si_descriptors *desc,
                                         unsigned shader_userdata_index,
                                         unsigned num_elements)
{
        MAYBE_UNUSED unsigned desc_slot;

        si_init_descriptors(desc, shader_userdata_index, 16, num_elements);
        sctx->bindless_descriptors.num_active_slots = num_elements;

        /* The first bindless descriptor is stored at slot 1, because 0 is not
         * considered to be a valid handle.
         */
        sctx->num_bindless_descriptors = 1;

        /* Track which bindless slots are used (or not). */
        util_idalloc_init(&sctx->bindless_used_slots);
        util_idalloc_resize(&sctx->bindless_used_slots, num_elements);

        /* Reserve slot 0 because it's an invalid handle for bindless. */
        desc_slot = util_idalloc_alloc(&sctx->bindless_used_slots);
        assert(desc_slot == 0);
}

static void si_release_bindless_descriptors(struct si_context *sctx)
{
        si_release_descriptors(&sctx->bindless_descriptors);
        util_idalloc_fini(&sctx->bindless_used_slots);
}

static unsigned si_get_first_free_bindless_slot(struct si_context *sctx)
{
        struct si_descriptors *desc = &sctx->bindless_descriptors;
        unsigned desc_slot;

        desc_slot = util_idalloc_alloc(&sctx->bindless_used_slots);
        if (desc_slot >= desc->num_elements) {
                /* The array of bindless descriptors is full, resize it. */
                unsigned slot_size = desc->element_dw_size * 4;
                unsigned new_num_elements = desc->num_elements * 2;

                desc->list = REALLOC(desc->list, desc->num_elements * slot_size,
                                     new_num_elements * slot_size);
                desc->num_elements = new_num_elements;
                desc->num_active_slots = new_num_elements;
        }

        assert(desc_slot);
        return desc_slot;
}

static unsigned
si_create_bindless_descriptor(struct si_context *sctx, uint32_t *desc_list,
                              unsigned size)
{
        struct si_descriptors *desc = &sctx->bindless_descriptors;
        unsigned desc_slot, desc_slot_offset;

        /* Find a free slot. */
        desc_slot = si_get_first_free_bindless_slot(sctx);

        /* For simplicity, sampler and image bindless descriptors use fixed
         * 16-dword slots for now. Image descriptors only need 8-dword but this
         * doesn't really matter because no real apps use image handles.
         */
        desc_slot_offset = desc_slot * 16;

        /* Copy the descriptor into the array. */
        memcpy(desc->list + desc_slot_offset, desc_list, size);

        /* Re-upload the whole array of bindless descriptors into a new buffer.
         */
        if (!si_upload_descriptors(sctx, desc))
                return 0;

        /* Make sure to re-emit the shader pointers for all stages. */
        sctx->graphics_bindless_pointer_dirty = true;
        sctx->compute_bindless_pointer_dirty = true;

        return desc_slot;
}

static void si_update_bindless_buffer_descriptor(struct si_context *sctx,
                                                 unsigned desc_slot,
                                                 struct pipe_resource *resource,
                                                 uint64_t offset,
                                                 bool *desc_dirty)
{
        struct si_descriptors *desc = &sctx->bindless_descriptors;
        struct r600_resource *buf = r600_resource(resource);
        unsigned desc_slot_offset = desc_slot * 16;
        uint32_t *desc_list = desc->list + desc_slot_offset + 4;
        uint64_t old_desc_va;

        assert(resource->target == PIPE_BUFFER);

        /* Retrieve the old buffer addr from the descriptor. */
        old_desc_va = si_desc_extract_buffer_address(desc_list);

        if (old_desc_va != buf->gpu_address + offset) {
                /* The buffer has been invalidated when the handle wasn't
                 * resident, update the descriptor and the dirty flag.
                 */
                si_set_buf_desc_address(buf, offset, &desc_list[0]);

                *desc_dirty = true;
        }
}

static uint64_t si_create_texture_handle(struct pipe_context *ctx,
                                         struct pipe_sampler_view *view,
                                         const struct pipe_sampler_state *state)
{
        struct si_sampler_view *sview = (struct si_sampler_view *)view;
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_texture_handle *tex_handle;
        struct si_sampler_state *sstate;
        uint32_t desc_list[16];
        uint64_t handle;

        tex_handle = CALLOC_STRUCT(si_texture_handle);
        if (!tex_handle)
                return 0;

        memset(desc_list, 0, sizeof(desc_list));
        si_init_descriptor_list(&desc_list[0], 16, 1, null_texture_descriptor);

        sstate = ctx->create_sampler_state(ctx, state);
        if (!sstate) {
                FREE(tex_handle);
                return 0;
        }

        si_set_sampler_view_desc(sctx, sview, sstate, &desc_list[0]);
        memcpy(&tex_handle->sstate, sstate, sizeof(*sstate));
        ctx->delete_sampler_state(ctx, sstate);

        tex_handle->desc_slot = si_create_bindless_descriptor(sctx, desc_list,
                                                              sizeof(desc_list));
        if (!tex_handle->desc_slot) {
                FREE(tex_handle);
                return 0;
        }

        handle = tex_handle->desc_slot;

        if (!_mesa_hash_table_insert(sctx->tex_handles, (void *)handle,
                                     tex_handle)) {
                FREE(tex_handle);
                return 0;
        }

        pipe_sampler_view_reference(&tex_handle->view, view);

        r600_resource(sview->base.texture)->texture_handle_allocated = true;

        return handle;
}

static void si_delete_texture_handle(struct pipe_context *ctx, uint64_t handle)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_texture_handle *tex_handle;
        struct hash_entry *entry;

        entry = _mesa_hash_table_search(sctx->tex_handles, (void *)handle);
        if (!entry)
                return;

        tex_handle = (struct si_texture_handle *)entry->data;

        /* Allow this descriptor slot to be re-used. */
        util_idalloc_free(&sctx->bindless_used_slots, tex_handle->desc_slot);

        pipe_sampler_view_reference(&tex_handle->view, NULL);
        _mesa_hash_table_remove(sctx->tex_handles, entry);
        FREE(tex_handle);
}

static void si_make_texture_handle_resident(struct pipe_context *ctx,
                                            uint64_t handle, bool resident)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_texture_handle *tex_handle;
        struct si_sampler_view *sview;
        struct hash_entry *entry;

        entry = _mesa_hash_table_search(sctx->tex_handles, (void *)handle);
        if (!entry)
                return;

        tex_handle = (struct si_texture_handle *)entry->data;
        sview = (struct si_sampler_view *)tex_handle->view;

        if (resident) {
                if (sview->base.texture->target != PIPE_BUFFER) {
                        struct r600_texture *rtex =
                                (struct r600_texture *)sview->base.texture;

                        if (depth_needs_decompression(rtex)) {
                                util_dynarray_append(
                                        &sctx->resident_tex_needs_depth_decompress,
                                        struct si_texture_handle *,
                                        tex_handle);
                        }

                        if (color_needs_decompression(rtex)) {
                                util_dynarray_append(
                                        &sctx->resident_tex_needs_color_decompress,
                                        struct si_texture_handle *,
                                        tex_handle);
                        }

                        if (rtex->dcc_offset &&
                            p_atomic_read(&rtex->framebuffers_bound))
                                sctx->need_check_render_feedback = true;

                        si_update_bindless_texture_descriptor(sctx, tex_handle);
                } else {
                        si_update_bindless_buffer_descriptor(sctx,
                                                             tex_handle->desc_slot,
                                                             sview->base.texture,
                                                             sview->base.u.buf.offset,
                                                             &tex_handle->desc_dirty);
                }

                /* Re-upload the descriptor if it has been updated while it
                 * wasn't resident.
                 */
                if (tex_handle->desc_dirty)
                        sctx->bindless_descriptors_dirty = true;

                /* Add the texture handle to the per-context list. */
                util_dynarray_append(&sctx->resident_tex_handles,
                                     struct si_texture_handle *, tex_handle);

                /* Add the buffers to the current CS in case si_begin_new_cs()
                 * is not going to be called.
                 */
                si_sampler_view_add_buffer(sctx, sview->base.texture,
                                           RADEON_USAGE_READ,
                                           sview->is_stencil_sampler, false);
        } else {
                /* Remove the texture handle from the per-context list. */
                util_dynarray_delete_unordered(&sctx->resident_tex_handles,
                                               struct si_texture_handle *,
                                               tex_handle);

                if (sview->base.texture->target != PIPE_BUFFER) {
                        util_dynarray_delete_unordered(
                                &sctx->resident_tex_needs_depth_decompress,
                                struct si_texture_handle *, tex_handle);

                        util_dynarray_delete_unordered(
                                &sctx->resident_tex_needs_color_decompress,
                                struct si_texture_handle *, tex_handle);
                }
        }
}

static uint64_t si_create_image_handle(struct pipe_context *ctx,
                                       const struct pipe_image_view *view)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_image_handle *img_handle;
        uint32_t desc_list[8];
        uint64_t handle;

        if (!view || !view->resource)
                return 0;

        img_handle = CALLOC_STRUCT(si_image_handle);
        if (!img_handle)
                return 0;

        memset(desc_list, 0, sizeof(desc_list));
        si_init_descriptor_list(&desc_list[0], 8, 1, null_image_descriptor);

        si_set_shader_image_desc(sctx, view, false, &desc_list[0]);

        img_handle->desc_slot = si_create_bindless_descriptor(sctx, desc_list,
                                                              sizeof(desc_list));
        if (!img_handle->desc_slot) {
                FREE(img_handle);
                return 0;
        }

        handle = img_handle->desc_slot;

        if (!_mesa_hash_table_insert(sctx->img_handles, (void *)handle,
                                     img_handle)) {
                FREE(img_handle);
                return 0;
        }

        util_copy_image_view(&img_handle->view, view);

        r600_resource(view->resource)->image_handle_allocated = true;

        return handle;
}

static void si_delete_image_handle(struct pipe_context *ctx, uint64_t handle)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_image_handle *img_handle;
        struct hash_entry *entry;

        entry = _mesa_hash_table_search(sctx->img_handles, (void *)handle);
        if (!entry)
                return;

        img_handle = (struct si_image_handle *)entry->data;

        util_copy_image_view(&img_handle->view, NULL);
        _mesa_hash_table_remove(sctx->img_handles, entry);
        FREE(img_handle);
}

static void si_make_image_handle_resident(struct pipe_context *ctx,
                                          uint64_t handle, unsigned access,
                                          bool resident)
{
        struct si_context *sctx = (struct si_context *)ctx;
        struct si_image_handle *img_handle;
        struct pipe_image_view *view;
        struct r600_resource *res;
        struct hash_entry *entry;

        entry = _mesa_hash_table_search(sctx->img_handles, (void *)handle);
        if (!entry)
                return;

        img_handle = (struct si_image_handle *)entry->data;
        view = &img_handle->view;
        res = (struct r600_resource *)view->resource;

        if (resident) {
                if (res->b.b.target != PIPE_BUFFER) {
                        struct r600_texture *rtex = (struct r600_texture *)res;
                        unsigned level = view->u.tex.level;

                        if (color_needs_decompression(rtex)) {
                                util_dynarray_append(
                                        &sctx->resident_img_needs_color_decompress,
                                        struct si_image_handle *,
                                        img_handle);
                        }

                        if (vi_dcc_enabled(rtex, level) &&
                            p_atomic_read(&rtex->framebuffers_bound))
                                sctx->need_check_render_feedback = true;

                        si_update_bindless_image_descriptor(sctx, img_handle);
                } else {
                        si_update_bindless_buffer_descriptor(sctx,
                                                             img_handle->desc_slot,
                                                             view->resource,
                                                             view->u.buf.offset,
                                                             &img_handle->desc_dirty);
                }

                /* Re-upload the descriptor if it has been updated while it
                 * wasn't resident.
                 */
                if (img_handle->desc_dirty)
                        sctx->bindless_descriptors_dirty = true;

                /* Add the image handle to the per-context list. */
                util_dynarray_append(&sctx->resident_img_handles,
                                     struct si_image_handle *, img_handle);

                /* Add the buffers to the current CS in case si_begin_new_cs()
                 * is not going to be called.
                 */
                si_sampler_view_add_buffer(sctx, view->resource,
                                           (access & PIPE_IMAGE_ACCESS_WRITE) ?
                                           RADEON_USAGE_READWRITE :
                                           RADEON_USAGE_READ, false, false);
        } else {
                /* Remove the image handle from the per-context list. */
                util_dynarray_delete_unordered(&sctx->resident_img_handles,
                                               struct si_image_handle *,
                                               img_handle);

                if (res->b.b.target != PIPE_BUFFER) {
                        util_dynarray_delete_unordered(
                                &sctx->resident_img_needs_color_decompress,
                                struct si_image_handle *,
                                img_handle);
                }
        }
}


void si_all_resident_buffers_begin_new_cs(struct si_context *sctx)
{
        unsigned num_resident_tex_handles, num_resident_img_handles;

        num_resident_tex_handles = sctx->resident_tex_handles.size /
                                   sizeof(struct si_texture_handle *);
        num_resident_img_handles = sctx->resident_img_handles.size /
                                   sizeof(struct si_image_handle *);

        /* Add all resident texture handles. */
        util_dynarray_foreach(&sctx->resident_tex_handles,
                              struct si_texture_handle *, tex_handle) {
                struct si_sampler_view *sview =
                        (struct si_sampler_view *)(*tex_handle)->view;

                si_sampler_view_add_buffer(sctx, sview->base.texture,
                                           RADEON_USAGE_READ,
                                           sview->is_stencil_sampler, false);
        }

        /* Add all resident image handles. */
        util_dynarray_foreach(&sctx->resident_img_handles,
                              struct si_image_handle *, img_handle) {
                struct pipe_image_view *view = &(*img_handle)->view;

                si_sampler_view_add_buffer(sctx, view->resource,
                                           RADEON_USAGE_READWRITE,
                                           false, false);
        }

        sctx->b.num_resident_handles += num_resident_tex_handles +
                                        num_resident_img_handles;
}

/* INIT/DEINIT/UPLOAD */

void si_init_all_descriptors(struct si_context *sctx)
{
        int i;

        STATIC_ASSERT(GFX9_SGPR_TCS_CONST_AND_SHADER_BUFFERS % 2 == 0);
        STATIC_ASSERT(GFX9_SGPR_GS_CONST_AND_SHADER_BUFFERS % 2 == 0);

        for (i = 0; i < SI_NUM_SHADERS; i++) {
                bool gfx9_tcs = false;
                bool gfx9_gs = false;
                unsigned num_sampler_slots = SI_NUM_IMAGES / 2 + SI_NUM_SAMPLERS;
                unsigned num_buffer_slots = SI_NUM_SHADER_BUFFERS + SI_NUM_CONST_BUFFERS;
                struct si_descriptors *desc;

                if (sctx->b.chip_class >= GFX9) {
                        gfx9_tcs = i == PIPE_SHADER_TESS_CTRL;
                        gfx9_gs = i == PIPE_SHADER_GEOMETRY;
                }

                desc = si_const_and_shader_buffer_descriptors(sctx, i);
                si_init_buffer_resources(&sctx->const_and_shader_buffers[i], desc,
                                         num_buffer_slots,
                                         gfx9_tcs ? GFX9_SGPR_TCS_CONST_AND_SHADER_BUFFERS :
                                         gfx9_gs ? GFX9_SGPR_GS_CONST_AND_SHADER_BUFFERS :
                                                   SI_SGPR_CONST_AND_SHADER_BUFFERS,
                                         RADEON_USAGE_READWRITE,
                                         RADEON_USAGE_READ,
                                         RADEON_PRIO_SHADER_RW_BUFFER,
                                         RADEON_PRIO_CONST_BUFFER);
                desc->slot_index_to_bind_directly = si_get_constbuf_slot(0);

                desc = si_sampler_and_image_descriptors(sctx, i);
                si_init_descriptors(desc,
                                    gfx9_tcs ? GFX9_SGPR_TCS_SAMPLERS_AND_IMAGES :
                                    gfx9_gs ? GFX9_SGPR_GS_SAMPLERS_AND_IMAGES :
                                              SI_SGPR_SAMPLERS_AND_IMAGES,
                                    16, num_sampler_slots);

                int j;
                for (j = 0; j < SI_NUM_IMAGES; j++)
                        memcpy(desc->list + j * 8, null_image_descriptor, 8 * 4);
                for (; j < SI_NUM_IMAGES + SI_NUM_SAMPLERS * 2; j++)
                        memcpy(desc->list + j * 8, null_texture_descriptor, 8 * 4);
        }

        si_init_buffer_resources(&sctx->rw_buffers,
                                 &sctx->descriptors[SI_DESCS_RW_BUFFERS],
                                 SI_NUM_RW_BUFFERS, SI_SGPR_RW_BUFFERS,
                                 /* The second set of usage/priority is used by
                                  * const buffers in RW buffer slots. */
                                 RADEON_USAGE_READWRITE, RADEON_USAGE_READ,
                                 RADEON_PRIO_SHADER_RINGS, RADEON_PRIO_CONST_BUFFER);
        sctx->descriptors[SI_DESCS_RW_BUFFERS].num_active_slots = SI_NUM_RW_BUFFERS;

        si_init_descriptors(&sctx->vertex_buffers, SI_SGPR_VERTEX_BUFFERS,
                            4, SI_NUM_VERTEX_BUFFERS);
        FREE(sctx->vertex_buffers.list); /* not used */
        sctx->vertex_buffers.list = NULL;

        /* Initialize an array of 1024 bindless descriptors, when the limit is
         * reached, just make it larger and re-upload the whole array.
         */
        si_init_bindless_descriptors(sctx, &sctx->bindless_descriptors,
                                     SI_SGPR_BINDLESS_SAMPLERS_AND_IMAGES,
                                     1024);

        sctx->descriptors_dirty = u_bit_consecutive(0, SI_NUM_DESCS);

        /* Set pipe_context functions. */
        sctx->b.b.bind_sampler_states = si_bind_sampler_states;
        sctx->b.b.set_shader_images = si_set_shader_images;
        sctx->b.b.set_constant_buffer = si_pipe_set_constant_buffer;
        sctx->b.b.set_polygon_stipple = si_set_polygon_stipple;
        sctx->b.b.set_shader_buffers = si_set_shader_buffers;
        sctx->b.b.set_sampler_views = si_set_sampler_views;
        sctx->b.b.create_texture_handle = si_create_texture_handle;
        sctx->b.b.delete_texture_handle = si_delete_texture_handle;
        sctx->b.b.make_texture_handle_resident = si_make_texture_handle_resident;
        sctx->b.b.create_image_handle = si_create_image_handle;
        sctx->b.b.delete_image_handle = si_delete_image_handle;
        sctx->b.b.make_image_handle_resident = si_make_image_handle_resident;
        sctx->b.invalidate_buffer = si_invalidate_buffer;
        sctx->b.rebind_buffer = si_rebind_buffer;

        /* Shader user data. */
        si_init_atom(sctx, &sctx->shader_pointers.atom, &sctx->atoms.s.shader_pointers,
                     si_emit_graphics_shader_pointers);

        /* Set default and immutable mappings. */
        si_set_user_data_base(sctx, PIPE_SHADER_VERTEX, R_00B130_SPI_SHADER_USER_DATA_VS_0);

        if (sctx->b.chip_class >= GFX9) {
                si_set_user_data_base(sctx, PIPE_SHADER_TESS_CTRL,
                                      R_00B430_SPI_SHADER_USER_DATA_LS_0);
                si_set_user_data_base(sctx, PIPE_SHADER_GEOMETRY,
                                      R_00B330_SPI_SHADER_USER_DATA_ES_0);
        } else {
                si_set_user_data_base(sctx, PIPE_SHADER_TESS_CTRL,
                                      R_00B430_SPI_SHADER_USER_DATA_HS_0);
                si_set_user_data_base(sctx, PIPE_SHADER_GEOMETRY,
                                      R_00B230_SPI_SHADER_USER_DATA_GS_0);
        }
        si_set_user_data_base(sctx, PIPE_SHADER_FRAGMENT, R_00B030_SPI_SHADER_USER_DATA_PS_0);
}

static bool si_upload_shader_descriptors(struct si_context *sctx, unsigned mask)
{
        unsigned dirty = sctx->descriptors_dirty & mask;

        /* Assume nothing will go wrong: */
        sctx->shader_pointers_dirty |= dirty;

        while (dirty) {
                unsigned i = u_bit_scan(&dirty);

                if (!si_upload_descriptors(sctx, &sctx->descriptors[i]))
                        return false;
        }

        sctx->descriptors_dirty &= ~mask;

        si_upload_bindless_descriptors(sctx);

        return true;
}

bool si_upload_graphics_shader_descriptors(struct si_context *sctx)
{
        const unsigned mask = u_bit_consecutive(0, SI_DESCS_FIRST_COMPUTE);
        return si_upload_shader_descriptors(sctx, mask);
}

bool si_upload_compute_shader_descriptors(struct si_context *sctx)
{
        /* Does not update rw_buffers as that is not needed for compute shaders
         * and the input buffer is using the same SGPR's anyway.
         */
        const unsigned mask = u_bit_consecutive(SI_DESCS_FIRST_COMPUTE,
                                                SI_NUM_DESCS - SI_DESCS_FIRST_COMPUTE);
        return si_upload_shader_descriptors(sctx, mask);
}

void si_release_all_descriptors(struct si_context *sctx)
{
        int i;

        for (i = 0; i < SI_NUM_SHADERS; i++) {
                si_release_buffer_resources(&sctx->const_and_shader_buffers[i],
                                            si_const_and_shader_buffer_descriptors(sctx, i));
                si_release_sampler_views(&sctx->samplers[i]);
                si_release_image_views(&sctx->images[i]);
        }
        si_release_buffer_resources(&sctx->rw_buffers,
                                    &sctx->descriptors[SI_DESCS_RW_BUFFERS]);
        for (i = 0; i < SI_NUM_VERTEX_BUFFERS; i++)
                pipe_vertex_buffer_unreference(&sctx->vertex_buffer[i]);

        for (i = 0; i < SI_NUM_DESCS; ++i)
                si_release_descriptors(&sctx->descriptors[i]);

        sctx->vertex_buffers.list = NULL; /* points into a mapped buffer */
        si_release_descriptors(&sctx->vertex_buffers);
        si_release_bindless_descriptors(sctx);
}

void si_all_descriptors_begin_new_cs(struct si_context *sctx)
{
        int i;

        for (i = 0; i < SI_NUM_SHADERS; i++) {
                si_buffer_resources_begin_new_cs(sctx, &sctx->const_and_shader_buffers[i]);
                si_sampler_views_begin_new_cs(sctx, &sctx->samplers[i]);
                si_image_views_begin_new_cs(sctx, &sctx->images[i]);
        }
        si_buffer_resources_begin_new_cs(sctx, &sctx->rw_buffers);
        si_vertex_buffers_begin_new_cs(sctx);

        for (i = 0; i < SI_NUM_DESCS; ++i)
                si_descriptors_begin_new_cs(sctx, &sctx->descriptors[i]);
        si_descriptors_begin_new_cs(sctx, &sctx->bindless_descriptors);

        si_shader_pointers_begin_new_cs(sctx);
}

void si_set_active_descriptors(struct si_context *sctx, unsigned desc_idx,
                               uint64_t new_active_mask)
{
        struct si_descriptors *desc = &sctx->descriptors[desc_idx];

        /* Ignore no-op updates and updates that disable all slots. */
        if (!new_active_mask ||
            new_active_mask == u_bit_consecutive64(desc->first_active_slot,
                                                   desc->num_active_slots))
                return;

        int first, count;
        u_bit_scan_consecutive_range64(&new_active_mask, &first, &count);
        assert(new_active_mask == 0);

        /* Upload/dump descriptors if slots are being enabled. */
        if (first < desc->first_active_slot ||
            first + count > desc->first_active_slot + desc->num_active_slots)
                sctx->descriptors_dirty |= 1u << desc_idx;

        desc->first_active_slot = first;
        desc->num_active_slots = count;
}

void si_set_active_descriptors_for_shader(struct si_context *sctx,
                                          struct si_shader_selector *sel)
{
        if (!sel)
                return;

        si_set_active_descriptors(sctx,
                si_const_and_shader_buffer_descriptors_idx(sel->type),
                sel->active_const_and_shader_buffers);
        si_set_active_descriptors(sctx,
                si_sampler_and_image_descriptors_idx(sel->type),
                sel->active_samplers_and_images);
}