/*
 * Copyright © 2009 Corbin Simpson
 * Copyright © 2011 Marek Olšák <maraeo@gmail.com>
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, 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 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 COPYRIGHT HOLDERS, AUTHORS
 * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 */

#include "radeon_drm_bo.h"
#include "radeon_drm_cs.h"
#include "radeon_drm_public.h"

#include "util/u_cpu_detect.h"
#include "util/u_memory.h"
#include "util/u_hash_table.h"
#include "util/u_pointer.h"

#include <xf86drm.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <radeon_surface.h>

static struct hash_table *fd_tab = NULL;
static mtx_t fd_tab_mutex = _MTX_INITIALIZER_NP;

/* Enable/disable feature access for one command stream.
 * If enable == true, return true on success.
 * Otherwise, return false.
 *
 * We basically do the same thing kernel does, because we have to deal
 * with multiple contexts (here command streams) backed by one winsys. */
static bool radeon_set_fd_access(struct radeon_drm_cs *applier,
                                 struct radeon_drm_cs **owner,
                                 mtx_t *mutex,
                                 unsigned request, const char *request_name,
                                 bool enable)
{
   struct drm_radeon_info info;
   unsigned value = enable ? 1 : 0;

   memset(&info, 0, sizeof(info));

   mtx_lock(&*mutex);

   /* Early exit if we are sure the request will fail. */
   if (enable) {
      if (*owner) {
         mtx_unlock(&*mutex);
         return false;
      }
   } else {
      if (*owner != applier) {
         mtx_unlock(&*mutex);
         return false;
      }
   }

   /* Pass through the request to the kernel. */
   info.value = (unsigned long)&value;
   info.request = request;
   if (drmCommandWriteRead(applier->ws->fd, DRM_RADEON_INFO,
                           &info, sizeof(info)) != 0) {
      mtx_unlock(&*mutex);
      return false;
   }

   /* Update the rights in the winsys. */
   if (enable) {
      if (value) {
         *owner = applier;
         mtx_unlock(&*mutex);
         return true;
      }
   } else {
      *owner = NULL;
   }

   mtx_unlock(&*mutex);
   return false;
}

static bool radeon_get_drm_value(int fd, unsigned request,
                                 const char *errname, uint32_t *out)
{
   struct drm_radeon_info info;
   int retval;

   memset(&info, 0, sizeof(info));

   info.value = (unsigned long)out;
   info.request = request;

   retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
   if (retval) {
      if (errname) {
         fprintf(stderr, "radeon: Failed to get %s, error number %d\n",
                 errname, retval);
      }
      return false;
   }
   return true;
}

/* Helper function to do the ioctls needed for setup and init. */
static bool do_winsys_init(struct radeon_drm_winsys *ws)
{
   struct drm_radeon_gem_info gem_info;
   int retval;
   drmVersionPtr version;

   memset(&gem_info, 0, sizeof(gem_info));

   /* We do things in a specific order here.
    *
    * DRM version first. We need to be sure we're running on a KMS chipset.
    * This is also for some features.
    *
    * Then, the PCI ID. This is essential and should return usable numbers
    * for all Radeons. If this fails, we probably got handed an FD for some
    * non-Radeon card.
    *
    * The GEM info is actually bogus on the kernel side, as well as our side
    * (see radeon_gem_info_ioctl in radeon_gem.c) but that's alright because
    * we don't actually use the info for anything yet.
    *
    * The GB and Z pipe requests should always succeed, but they might not
    * return sensical values for all chipsets, but that's alright because
    * the pipe drivers already know that.
    */

   /* Get DRM version. */
   version = drmGetVersion(ws->fd);
   if (version->version_major != 2 ||
       version->version_minor < 12) {
      fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
                      "only compatible with 2.12.0 (kernel 3.2) or later.\n",
              __FUNCTION__,
              version->version_major,
              version->version_minor,
              version->version_patchlevel);
      drmFreeVersion(version);
      return false;
   }

   ws->info.drm_major = version->version_major;
   ws->info.drm_minor = version->version_minor;
   ws->info.drm_patchlevel = version->version_patchlevel;
   ws->info.is_amdgpu = false;
   drmFreeVersion(version);

   /* Get PCI ID. */
   if (!radeon_get_drm_value(ws->fd, RADEON_INFO_DEVICE_ID, "PCI ID",
                             &ws->info.pci_id))
      return false;

   /* Check PCI ID. */
   switch (ws->info.pci_id) {
#define CHIPSET(pci_id, name, cfamily) case pci_id: ws->info.family = CHIP_##cfamily; ws->gen = DRV_R300; break;
#include "pci_ids/r300_pci_ids.h"
#undef CHIPSET

#define CHIPSET(pci_id, name, cfamily) case pci_id: ws->info.family = CHIP_##cfamily; ws->gen = DRV_R600; break;
#include "pci_ids/r600_pci_ids.h"
#undef CHIPSET

#define CHIPSET(pci_id, cfamily) \
   case pci_id: \
   ws->info.family = CHIP_##cfamily; \
   ws->info.name = #cfamily; \
   ws->gen = DRV_SI; \
   break;
#include "pci_ids/radeonsi_pci_ids.h"
#undef CHIPSET

   default:
      fprintf(stderr, "radeon: Invalid PCI ID.\n");
      return false;
   }

   switch (ws->info.family) {
   default:
   case CHIP_UNKNOWN:
      fprintf(stderr, "radeon: Unknown family.\n");
      return false;
   case CHIP_R300:
   case CHIP_R350:
   case CHIP_RV350:
   case CHIP_RV370:
   case CHIP_RV380:
   case CHIP_RS400:
   case CHIP_RC410:
   case CHIP_RS480:
      ws->info.chip_class = R300;
      break;
   case CHIP_R420:     /* R4xx-based cores. */
   case CHIP_R423:
   case CHIP_R430:
   case CHIP_R480:
   case CHIP_R481:
   case CHIP_RV410:
   case CHIP_RS600:
   case CHIP_RS690:
   case CHIP_RS740:
      ws->info.chip_class = R400;
      break;
   case CHIP_RV515:    /* R5xx-based cores. */
   case CHIP_R520:
   case CHIP_RV530:
   case CHIP_R580:
   case CHIP_RV560:
   case CHIP_RV570:
      ws->info.chip_class = R500;
      break;
   case CHIP_R600:
   case CHIP_RV610:
   case CHIP_RV630:
   case CHIP_RV670:
   case CHIP_RV620:
   case CHIP_RV635:
   case CHIP_RS780:
   case CHIP_RS880:
      ws->info.chip_class = R600;
      break;
   case CHIP_RV770:
   case CHIP_RV730:
   case CHIP_RV710:
   case CHIP_RV740:
      ws->info.chip_class = R700;
      break;
   case CHIP_CEDAR:
   case CHIP_REDWOOD:
   case CHIP_JUNIPER:
   case CHIP_CYPRESS:
   case CHIP_HEMLOCK:
   case CHIP_PALM:
   case CHIP_SUMO:
   case CHIP_SUMO2:
   case CHIP_BARTS:
   case CHIP_TURKS:
   case CHIP_CAICOS:
      ws->info.chip_class = EVERGREEN;
      break;
   case CHIP_CAYMAN:
   case CHIP_ARUBA:
      ws->info.chip_class = CAYMAN;
      break;
   case CHIP_TAHITI:
   case CHIP_PITCAIRN:
   case CHIP_VERDE:
   case CHIP_OLAND:
   case CHIP_HAINAN:
      ws->info.chip_class = GFX6;
      break;
   case CHIP_BONAIRE:
   case CHIP_KAVERI:
   case CHIP_KABINI:
   case CHIP_HAWAII:
      ws->info.chip_class = GFX7;
      break;
   }

   /* Set which chips don't have dedicated VRAM. */
   switch (ws->info.family) {
   case CHIP_RS400:
   case CHIP_RC410:
   case CHIP_RS480:
   case CHIP_RS600:
   case CHIP_RS690:
   case CHIP_RS740:
   case CHIP_RS780:
   case CHIP_RS880:
   case CHIP_PALM:
   case CHIP_SUMO:
   case CHIP_SUMO2:
   case CHIP_ARUBA:
   case CHIP_KAVERI:
   case CHIP_KABINI:
      ws->info.has_dedicated_vram = false;
      break;

   default:
      ws->info.has_dedicated_vram = true;
   }

   ws->info.num_rings[RING_GFX] = 1;
   /* Check for dma */
   ws->info.num_rings[RING_DMA] = 0;
   /* DMA is disabled on R700. There is IB corruption and hangs. */
   if (ws->info.chip_class >= EVERGREEN && ws->info.drm_minor >= 27) {
      ws->info.num_rings[RING_DMA] = 1;
   }

   /* Check for UVD and VCE */
   ws->info.has_hw_decode = false;
   ws->info.vce_fw_version = 0x00000000;
   if (ws->info.drm_minor >= 32) {
      uint32_t value = RADEON_CS_RING_UVD;
      if (radeon_get_drm_value(ws->fd, RADEON_INFO_RING_WORKING,
                               "UVD Ring working", &value)) {
         ws->info.has_hw_decode = value;
         ws->info.num_rings[RING_UVD] = 1;
      }

      value = RADEON_CS_RING_VCE;
      if (radeon_get_drm_value(ws->fd, RADEON_INFO_RING_WORKING,
                               NULL, &value) && value) {

         if (radeon_get_drm_value(ws->fd, RADEON_INFO_VCE_FW_VERSION,
                                  "VCE FW version", &value)) {
            ws->info.vce_fw_version = value;
            ws->info.num_rings[RING_VCE] = 1;
         }
      }
   }

   /* Check for userptr support. */
   {
      struct drm_radeon_gem_userptr args = {0};

      /* If the ioctl doesn't exist, -EINVAL is returned.
       *
       * If the ioctl exists, it should return -EACCES
       * if RADEON_GEM_USERPTR_READONLY or RADEON_GEM_USERPTR_REGISTER
       * aren't set.
       */
      ws->info.has_userptr =
            drmCommandWriteRead(ws->fd, DRM_RADEON_GEM_USERPTR,
                                &args, sizeof(args)) == -EACCES;
   }

   /* Get GEM info. */
   retval = drmCommandWriteRead(ws->fd, DRM_RADEON_GEM_INFO,
                                &gem_info, sizeof(gem_info));
   if (retval) {
      fprintf(stderr, "radeon: Failed to get MM info, error number %d\n",
              retval);
      return false;
   }
   ws->info.gart_size = gem_info.gart_size;
   ws->info.vram_size = gem_info.vram_size;
   ws->info.vram_vis_size = gem_info.vram_visible;
   /* Older versions of the kernel driver reported incorrect values, and
    * didn't support more than 256MB of visible VRAM anyway
    */
   if (ws->info.drm_minor < 49)
      ws->info.vram_vis_size = MIN2(ws->info.vram_vis_size, 256*1024*1024);

   /* Radeon allocates all buffers contiguously, which makes large allocations
    * unlikely to succeed. */
   if (ws->info.has_dedicated_vram)
      ws->info.max_alloc_size = ws->info.vram_size * 0.7;
   else
      ws->info.max_alloc_size = ws->info.gart_size * 0.7;

   if (ws->info.drm_minor < 40)
      ws->info.max_alloc_size = MIN2(ws->info.max_alloc_size, 256*1024*1024);
   /* Both 32-bit and 64-bit address spaces only have 4GB. */
   ws->info.max_alloc_size = MIN2(ws->info.max_alloc_size, 3ull*1024*1024*1024);

   /* Get max clock frequency info and convert it to MHz */
   radeon_get_drm_value(ws->fd, RADEON_INFO_MAX_SCLK, NULL,
                        &ws->info.max_shader_clock);
   ws->info.max_shader_clock /= 1000;

   ws->num_cpus = sysconf(_SC_NPROCESSORS_ONLN);

   /* Generation-specific queries. */
   if (ws->gen == DRV_R300) {
      if (!radeon_get_drm_value(ws->fd, RADEON_INFO_NUM_GB_PIPES,
                                "GB pipe count",
                                &ws->info.r300_num_gb_pipes))
         return false;

      if (!radeon_get_drm_value(ws->fd, RADEON_INFO_NUM_Z_PIPES,
                                "Z pipe count",
                                &ws->info.r300_num_z_pipes))
         return false;
   }
   else if (ws->gen >= DRV_R600) {
      uint32_t tiling_config = 0;

      if (!radeon_get_drm_value(ws->fd, RADEON_INFO_NUM_BACKENDS,
                                "num backends",
                                &ws->info.num_render_backends))
         return false;

      /* get the GPU counter frequency, failure is not fatal */
      radeon_get_drm_value(ws->fd, RADEON_INFO_CLOCK_CRYSTAL_FREQ, NULL,
                           &ws->info.clock_crystal_freq);

      radeon_get_drm_value(ws->fd, RADEON_INFO_TILING_CONFIG, NULL,
                           &tiling_config);

      ws->info.r600_num_banks =
            ws->info.chip_class >= EVERGREEN ?
               4 << ((tiling_config & 0xf0) >> 4) :
                    4 << ((tiling_config & 0x30) >> 4);

      ws->info.pipe_interleave_bytes =
            ws->info.chip_class >= EVERGREEN ?
               256 << ((tiling_config & 0xf00) >> 8) :
                      256 << ((tiling_config & 0xc0) >> 6);

      if (!ws->info.pipe_interleave_bytes)
         ws->info.pipe_interleave_bytes =
               ws->info.chip_class >= EVERGREEN ? 512 : 256;

      radeon_get_drm_value(ws->fd, RADEON_INFO_NUM_TILE_PIPES, NULL,
                           &ws->info.num_tile_pipes);

      /* "num_tiles_pipes" must be equal to the number of pipes (Px) in the
       * pipe config field of the GB_TILE_MODE array. Only one card (Tahiti)
       * reports a different value (12). Fix it by setting what's in the
       * GB_TILE_MODE array (8).
       */
      if (ws->gen == DRV_SI && ws->info.num_tile_pipes == 12)
         ws->info.num_tile_pipes = 8;

      if (radeon_get_drm_value(ws->fd, RADEON_INFO_BACKEND_MAP, NULL,
                               &ws->info.r600_gb_backend_map))
         ws->info.r600_gb_backend_map_valid = true;

      /* Default value. */
      ws->info.enabled_rb_mask = u_bit_consecutive(0, ws->info.num_render_backends);
      /*
       * This fails (silently) on non-GCN or older kernels, overwriting the
       * default enabled_rb_mask with the result of the last query.
       */
      if (ws->gen >= DRV_SI)
         radeon_get_drm_value(ws->fd, RADEON_INFO_SI_BACKEND_ENABLED_MASK, NULL,
                              &ws->info.enabled_rb_mask);

      ws->info.r600_has_virtual_memory = false;
      if (ws->info.drm_minor >= 13) {
         uint32_t ib_vm_max_size;

         ws->info.r600_has_virtual_memory = true;
         if (!radeon_get_drm_value(ws->fd, RADEON_INFO_VA_START, NULL,
                                   &ws->va_start))
            ws->info.r600_has_virtual_memory = false;
         if (!radeon_get_drm_value(ws->fd, RADEON_INFO_IB_VM_MAX_SIZE, NULL,
                                   &ib_vm_max_size))
            ws->info.r600_has_virtual_memory = false;
         radeon_get_drm_value(ws->fd, RADEON_INFO_VA_UNMAP_WORKING, NULL,
                              &ws->va_unmap_working);
      }
      if (ws->gen == DRV_R600 && !debug_get_bool_option("RADEON_VA", false))
         ws->info.r600_has_virtual_memory = false;
   }

   /* Get max pipes, this is only needed for compute shaders.  All evergreen+
    * chips have at least 2 pipes, so we use 2 as a default. */
   ws->info.r600_max_quad_pipes = 2;
   radeon_get_drm_value(ws->fd, RADEON_INFO_MAX_PIPES, NULL,
                        &ws->info.r600_max_quad_pipes);

   /* All GPUs have at least one compute unit */
   ws->info.num_good_compute_units = 1;
   radeon_get_drm_value(ws->fd, RADEON_INFO_ACTIVE_CU_COUNT, NULL,
                        &ws->info.num_good_compute_units);

   radeon_get_drm_value(ws->fd, RADEON_INFO_MAX_SE, NULL,
                        &ws->info.max_se);

   switch (ws->info.family) {
   case CHIP_HAINAN:
   case CHIP_KABINI:
      ws->info.num_tcc_blocks = 2;
      break;
   case CHIP_VERDE:
   case CHIP_OLAND:
   case CHIP_BONAIRE:
   case CHIP_KAVERI:
      ws->info.num_tcc_blocks = 4;
      break;
   case CHIP_PITCAIRN:
      ws->info.num_tcc_blocks = 8;
      break;
   case CHIP_TAHITI:
      ws->info.num_tcc_blocks = 12;
      break;
   case CHIP_HAWAII:
      ws->info.num_tcc_blocks = 16;
      break;
   default:
      ws->info.num_tcc_blocks = 0;
      break;
   }

   if (!ws->info.max_se) {
      switch (ws->info.family) {
      default:
         ws->info.max_se = 1;
         break;
      case CHIP_CYPRESS:
      case CHIP_HEMLOCK:
      case CHIP_BARTS:
      case CHIP_CAYMAN:
      case CHIP_TAHITI:
      case CHIP_PITCAIRN:
      case CHIP_BONAIRE:
         ws->info.max_se = 2;
         break;
      case CHIP_HAWAII:
         ws->info.max_se = 4;
         break;
      }
   }

   radeon_get_drm_value(ws->fd, RADEON_INFO_MAX_SH_PER_SE, NULL,
                        &ws->info.max_sh_per_se);
   if (ws->gen == DRV_SI) {
      ws->info.num_good_cu_per_sh = ws->info.num_good_compute_units /
                                    (ws->info.max_se * ws->info.max_sh_per_se);
   }

   radeon_get_drm_value(ws->fd, RADEON_INFO_ACCEL_WORKING2, NULL,
                        &ws->accel_working2);
   if (ws->info.family == CHIP_HAWAII && ws->accel_working2 < 2) {
      fprintf(stderr, "radeon: GPU acceleration for Hawaii disabled, "
                      "returned accel_working2 value %u is smaller than 2. "
                      "Please install a newer kernel.\n",
              ws->accel_working2);
      return false;
   }

   if (ws->info.chip_class == GFX7) {
      if (!radeon_get_drm_value(ws->fd, RADEON_INFO_CIK_MACROTILE_MODE_ARRAY, NULL,
                                ws->info.cik_macrotile_mode_array)) {
         fprintf(stderr, "radeon: Kernel 3.13 is required for Sea Islands support.\n");
         return false;
      }
   }

   if (ws->info.chip_class >= GFX6) {
      if (!radeon_get_drm_value(ws->fd, RADEON_INFO_SI_TILE_MODE_ARRAY, NULL,
                                ws->info.si_tile_mode_array)) {
         fprintf(stderr, "radeon: Kernel 3.10 is required for Southern Islands support.\n");
         return false;
      }
   }

   /* Hawaii with old firmware needs type2 nop packet.
    * accel_working2 with value 3 indicates the new firmware.
    */
   ws->info.gfx_ib_pad_with_type2 = ws->info.chip_class <= GFX6 ||
                                    (ws->info.family == CHIP_HAWAII &&
                                     ws->accel_working2 < 3);
   ws->info.tcc_cache_line_size = 64; /* TC L2 line size on GCN */
   ws->info.ib_start_alignment = 4096;
   ws->info.kernel_flushes_hdp_before_ib = ws->info.drm_minor >= 40;
   /* HTILE is broken with 1D tiling on old kernels and GFX7. */
   ws->info.htile_cmask_support_1d_tiling = ws->info.chip_class != GFX7 ||
                                                                   ws->info.drm_minor >= 38;
   ws->info.si_TA_CS_BC_BASE_ADDR_allowed = ws->info.drm_minor >= 48;
   ws->info.has_bo_metadata = false;
   ws->info.has_gpu_reset_status_query = ws->info.drm_minor >= 43;
   ws->info.has_eqaa_surface_allocator = false;
   ws->info.has_format_bc1_through_bc7 = ws->info.drm_minor >= 31;
   ws->info.kernel_flushes_tc_l2_after_ib = true;
   /* Old kernels disallowed register writes via COPY_DATA
    * that are used for indirect compute dispatches. */
   ws->info.has_indirect_compute_dispatch = ws->info.chip_class == GFX7 ||
                                            (ws->info.chip_class == GFX6 &&
                                             ws->info.drm_minor >= 45);
   /* GFX6 doesn't support unaligned loads. */
   ws->info.has_unaligned_shader_loads = ws->info.chip_class == GFX7 &&
                                         ws->info.drm_minor >= 50;
   ws->info.has_sparse_vm_mappings = false;
   /* 2D tiling on GFX7 is supported since DRM 2.35.0 */
   ws->info.has_2d_tiling = ws->info.chip_class <= GFX6 || ws->info.drm_minor >= 35;
   ws->info.has_read_registers_query = ws->info.drm_minor >= 42;
   ws->info.max_alignment = 1024*1024;
   ws->info.has_graphics = true;
   ws->info.cpdma_prefetch_writes_memory = true;
   ws->info.max_wave64_per_simd = 10;
   ws->info.num_physical_sgprs_per_simd = 512;
   ws->info.num_physical_wave64_vgprs_per_simd = 256;
   /* Potential hang on Kabini: */
   ws->info.use_late_alloc = ws->info.family != CHIP_KABINI;

   ws->check_vm = strstr(debug_get_option("R600_DEBUG", ""), "check_vm") != NULL ||
                                                                            strstr(debug_get_option("AMD_DEBUG", ""), "check_vm") != NULL;

   return true;
}

static void radeon_winsys_destroy(struct radeon_winsys *rws)
{
   struct radeon_drm_winsys *ws = (struct radeon_drm_winsys*)rws;

   if (util_queue_is_initialized(&ws->cs_queue))
      util_queue_destroy(&ws->cs_queue);

   mtx_destroy(&ws->hyperz_owner_mutex);
   mtx_destroy(&ws->cmask_owner_mutex);

   if (ws->info.r600_has_virtual_memory)
      pb_slabs_deinit(&ws->bo_slabs);
   pb_cache_deinit(&ws->bo_cache);

   if (ws->gen >= DRV_R600) {
      radeon_surface_manager_free(ws->surf_man);
   }

   _mesa_hash_table_destroy(ws->bo_names, NULL);
   _mesa_hash_table_destroy(ws->bo_handles, NULL);
   _mesa_hash_table_u64_destroy(ws->bo_vas, NULL);
   mtx_destroy(&ws->bo_handles_mutex);
   mtx_destroy(&ws->vm32.mutex);
   mtx_destroy(&ws->vm64.mutex);
   mtx_destroy(&ws->bo_fence_lock);

   if (ws->fd >= 0)
      close(ws->fd);

   FREE(rws);
}

static void radeon_query_info(struct radeon_winsys *rws,
                              struct radeon_info *info)
{
   *info = ((struct radeon_drm_winsys *)rws)->info;
}

static bool radeon_cs_request_feature(struct radeon_cmdbuf *rcs,
                                      enum radeon_feature_id fid,
                                      bool enable)
{
   struct radeon_drm_cs *cs = radeon_drm_cs(rcs);

   switch (fid) {
   case RADEON_FID_R300_HYPERZ_ACCESS:
      return radeon_set_fd_access(cs, &cs->ws->hyperz_owner,
                                  &cs->ws->hyperz_owner_mutex,
                                  RADEON_INFO_WANT_HYPERZ, "Hyper-Z",
                                  enable);

   case RADEON_FID_R300_CMASK_ACCESS:
      return radeon_set_fd_access(cs, &cs->ws->cmask_owner,
                                  &cs->ws->cmask_owner_mutex,
                                  RADEON_INFO_WANT_CMASK, "AA optimizations",
                                  enable);
   }
   return false;
}

uint32_t radeon_drm_get_gpu_reset_counter(struct radeon_drm_winsys *ws)
{
   uint64_t retval = 0;

   if (!ws->info.has_gpu_reset_status_query)
      return 0;

   radeon_get_drm_value(ws->fd, RADEON_INFO_GPU_RESET_COUNTER,
                        "gpu-reset-counter", (uint32_t*)&retval);
   return retval;
}

static uint64_t radeon_query_value(struct radeon_winsys *rws,
                                   enum radeon_value_id value)
{
   struct radeon_drm_winsys *ws = (struct radeon_drm_winsys*)rws;
   uint64_t retval = 0;

   switch (value) {
   case RADEON_REQUESTED_VRAM_MEMORY:
      return ws->allocated_vram;
   case RADEON_REQUESTED_GTT_MEMORY:
      return ws->allocated_gtt;
   case RADEON_MAPPED_VRAM:
      return ws->mapped_vram;
   case RADEON_MAPPED_GTT:
      return ws->mapped_gtt;
   case RADEON_BUFFER_WAIT_TIME_NS:
      return ws->buffer_wait_time;
   case RADEON_NUM_MAPPED_BUFFERS:
      return ws->num_mapped_buffers;
   case RADEON_TIMESTAMP:
      if (ws->info.drm_minor < 20 || ws->gen < DRV_R600) {
         assert(0);
         return 0;
      }

      radeon_get_drm_value(ws->fd, RADEON_INFO_TIMESTAMP, "timestamp",
                           (uint32_t*)&retval);
      return retval;
   case RADEON_NUM_GFX_IBS:
      return ws->num_gfx_IBs;
   case RADEON_NUM_SDMA_IBS:
      return ws->num_sdma_IBs;
   case RADEON_NUM_BYTES_MOVED:
      radeon_get_drm_value(ws->fd, RADEON_INFO_NUM_BYTES_MOVED,
                           "num-bytes-moved", (uint32_t*)&retval);
      return retval;
   case RADEON_NUM_EVICTIONS:
   case RADEON_NUM_VRAM_CPU_PAGE_FAULTS:
   case RADEON_VRAM_VIS_USAGE:
   case RADEON_GFX_BO_LIST_COUNTER:
   case RADEON_GFX_IB_SIZE_COUNTER:
      return 0; /* unimplemented */
   case RADEON_VRAM_USAGE:
      radeon_get_drm_value(ws->fd, RADEON_INFO_VRAM_USAGE,
                           "vram-usage", (uint32_t*)&retval);
      return retval;
   case RADEON_GTT_USAGE:
      radeon_get_drm_value(ws->fd, RADEON_INFO_GTT_USAGE,
                           "gtt-usage", (uint32_t*)&retval);
      return retval;
   case RADEON_GPU_TEMPERATURE:
      radeon_get_drm_value(ws->fd, RADEON_INFO_CURRENT_GPU_TEMP,
                           "gpu-temp", (uint32_t*)&retval);
      return retval;
   case RADEON_CURRENT_SCLK:
      radeon_get_drm_value(ws->fd, RADEON_INFO_CURRENT_GPU_SCLK,
                           "current-gpu-sclk", (uint32_t*)&retval);
      return retval;
   case RADEON_CURRENT_MCLK:
      radeon_get_drm_value(ws->fd, RADEON_INFO_CURRENT_GPU_MCLK,
                           "current-gpu-mclk", (uint32_t*)&retval);
      return retval;
   case RADEON_CS_THREAD_TIME:
      return util_queue_get_thread_time_nano(&ws->cs_queue, 0);
   }
   return 0;
}

static bool radeon_read_registers(struct radeon_winsys *rws,
                                  unsigned reg_offset,
                                  unsigned num_registers, uint32_t *out)
{
   struct radeon_drm_winsys *ws = (struct radeon_drm_winsys*)rws;
   unsigned i;

   for (i = 0; i < num_registers; i++) {
      uint32_t reg = reg_offset + i*4;

      if (!radeon_get_drm_value(ws->fd, RADEON_INFO_READ_REG, NULL, &reg))
         return false;
      out[i] = reg;
   }
   return true;
}

DEBUG_GET_ONCE_BOOL_OPTION(thread, "RADEON_THREAD", true)

static bool radeon_winsys_unref(struct radeon_winsys *ws)
{
   struct radeon_drm_winsys *rws = (struct radeon_drm_winsys*)ws;
   bool destroy;

   /* When the reference counter drops to zero, remove the fd from the table.
    * This must happen while the mutex is locked, so that
    * radeon_drm_winsys_create in another thread doesn't get the winsys
    * from the table when the counter drops to 0. */
   mtx_lock(&fd_tab_mutex);

   destroy = pipe_reference(&rws->reference, NULL);
   if (destroy && fd_tab) {
      _mesa_hash_table_remove_key(fd_tab, intptr_to_pointer(rws->fd));
      if (_mesa_hash_table_num_entries(fd_tab) == 0) {
         _mesa_hash_table_destroy(fd_tab, NULL);
         fd_tab = NULL;
      }
   }

   mtx_unlock(&fd_tab_mutex);
   return destroy;
}

static void radeon_pin_threads_to_L3_cache(struct radeon_winsys *ws,
                                           unsigned cache)
{
   struct radeon_drm_winsys *rws = (struct radeon_drm_winsys*)ws;

   if (util_queue_is_initialized(&rws->cs_queue)) {
      util_pin_thread_to_L3(rws->cs_queue.threads[0], cache,
            util_cpu_caps.cores_per_L3);
   }
}

PUBLIC struct radeon_winsys *
radeon_drm_winsys_create(int fd, const struct pipe_screen_config *config,
                         radeon_screen_create_t screen_create)
{
   struct radeon_drm_winsys *ws;

   mtx_lock(&fd_tab_mutex);
   if (!fd_tab) {
      fd_tab = util_hash_table_create_fd_keys();
   }

   ws = util_hash_table_get(fd_tab, intptr_to_pointer(fd));
   if (ws) {
      pipe_reference(NULL, &ws->reference);
      mtx_unlock(&fd_tab_mutex);
      return &ws->base;
   }

   ws = CALLOC_STRUCT(radeon_drm_winsys);
   if (!ws) {
      mtx_unlock(&fd_tab_mutex);
      return NULL;
   }

   ws->fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);

   if (!do_winsys_init(ws))
      goto fail1;

   pb_cache_init(&ws->bo_cache, RADEON_MAX_CACHED_HEAPS,
                 500000, ws->check_vm ? 1.0f : 2.0f, 0,
                 MIN2(ws->info.vram_size, ws->info.gart_size),
                 radeon_bo_destroy,
                 radeon_bo_can_reclaim);

   if (ws->info.r600_has_virtual_memory) {
      /* There is no fundamental obstacle to using slab buffer allocation
       * without GPUVM, but enabling it requires making sure that the drivers
       * honor the address offset.
       */
      if (!pb_slabs_init(&ws->bo_slabs,
                         RADEON_SLAB_MIN_SIZE_LOG2, RADEON_SLAB_MAX_SIZE_LOG2,
                         RADEON_MAX_SLAB_HEAPS,
                         ws,
                         radeon_bo_can_reclaim_slab,
                         radeon_bo_slab_alloc,
                         radeon_bo_slab_free))
         goto fail_cache;

      ws->info.min_alloc_size = 1 << RADEON_SLAB_MIN_SIZE_LOG2;
   } else {
      ws->info.min_alloc_size = ws->info.gart_page_size;
   }

   if (ws->gen >= DRV_R600) {
      ws->surf_man = radeon_surface_manager_new(ws->fd);
      if (!ws->surf_man)
         goto fail_slab;
   }

   /* init reference */
   pipe_reference_init(&ws->reference, 1);

   /* Set functions. */
   ws->base.unref = radeon_winsys_unref;
   ws->base.destroy = radeon_winsys_destroy;
   ws->base.query_info = radeon_query_info;
   ws->base.pin_threads_to_L3_cache = radeon_pin_threads_to_L3_cache;
   ws->base.cs_request_feature = radeon_cs_request_feature;
   ws->base.query_value = radeon_query_value;
   ws->base.read_registers = radeon_read_registers;

   radeon_drm_bo_init_functions(ws);
   radeon_drm_cs_init_functions(ws);
   radeon_surface_init_functions(ws);

   (void) mtx_init(&ws->hyperz_owner_mutex, mtx_plain);
   (void) mtx_init(&ws->cmask_owner_mutex, mtx_plain);

   ws->bo_names = util_hash_table_create_ptr_keys();
   ws->bo_handles = util_hash_table_create_ptr_keys();
   ws->bo_vas = _mesa_hash_table_u64_create(NULL);
   (void) mtx_init(&ws->bo_handles_mutex, mtx_plain);
   (void) mtx_init(&ws->vm32.mutex, mtx_plain);
   (void) mtx_init(&ws->vm64.mutex, mtx_plain);
   (void) mtx_init(&ws->bo_fence_lock, mtx_plain);
   list_inithead(&ws->vm32.holes);
   list_inithead(&ws->vm64.holes);

   /* The kernel currently returns 8MB. Make sure this doesn't change. */
   if (ws->va_start > 8 * 1024 * 1024) {
      /* Not enough 32-bit address space. */
      radeon_winsys_destroy(&ws->base);
      mtx_unlock(&fd_tab_mutex);
      return NULL;
   }

   ws->vm32.start = ws->va_start;
   ws->vm32.end = 1ull << 32;

   /* The maximum is 8GB of virtual address space limited by the kernel.
    * It's obviously not enough for bigger cards, like Hawaiis with 4GB
    * and 8GB of physical memory and 4GB of GART.
    *
    * Older kernels set the limit to 4GB, which is even worse, so they only
    * have 32-bit address space.
    */
   if (ws->info.drm_minor >= 41) {
      ws->vm64.start = 1ull << 32;
      ws->vm64.end = 1ull << 33;
   }

   /* TTM aligns the BO size to the CPU page size */
   ws->info.gart_page_size = sysconf(_SC_PAGESIZE);
   ws->info.pte_fragment_size = 64 * 1024; /* GPUVM page size */

   if (ws->num_cpus > 1 && debug_get_option_thread())
      util_queue_init(&ws->cs_queue, "rcs", 8, 1, 0);

   /* Create the screen at the end. The winsys must be initialized
    * completely.
    *
    * Alternatively, we could create the screen based on "ws->gen"
    * and link all drivers into one binary blob. */
   ws->base.screen = screen_create(&ws->base, config);
   if (!ws->base.screen) {
      radeon_winsys_destroy(&ws->base);
      mtx_unlock(&fd_tab_mutex);
      return NULL;
   }

   _mesa_hash_table_insert(fd_tab, intptr_to_pointer(ws->fd), ws);

   /* We must unlock the mutex once the winsys is fully initialized, so that
    * other threads attempting to create the winsys from the same fd will
    * get a fully initialized winsys and not just half-way initialized. */
   mtx_unlock(&fd_tab_mutex);

   return &ws->base;

fail_slab:
   if (ws->info.r600_has_virtual_memory)
      pb_slabs_deinit(&ws->bo_slabs);
fail_cache:
   pb_cache_deinit(&ws->bo_cache);
fail1:
   mtx_unlock(&fd_tab_mutex);
   if (ws->surf_man)
      radeon_surface_manager_free(ws->surf_man);
   if (ws->fd >= 0)
      close(ws->fd);

   FREE(ws);
   return NULL;
}
