LXR linux/drivers/gpu/drm/amd/display/dc/core/dc_vm

   1/*
   2 * Copyright 2018 Advanced Micro Devices, Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 *
  22 * Authors: AMD
  23 *
  24 */
  25
  26#include "vm_helper.h"
  27#include "dc.h"
  28
  29void vm_helper_mark_vmid_used(struct vm_helper *vm_helper, unsigned int pos, uint8_t hubp_idx)
  30{
  31        struct vmid_usage vmids = vm_helper->hubp_vmid_usage[hubp_idx];
  32
  33        vmids.vmid_usage[0] = vmids.vmid_usage[1];
  34        vmids.vmid_usage[1] = 1 << pos;
  35}
  36
  37int dc_setup_system_context(struct dc *dc, struct dc_phy_addr_space_config *pa_config)
  38{
  39        int num_vmids = 0;
  40
  41        /* Call HWSS to setup HUBBUB for address config */
  42        if (dc->hwss.init_sys_ctx) {
  43                num_vmids = dc->hwss.init_sys_ctx(dc->hwseq, dc, pa_config);
  44
  45                /* Pre-init system aperture start/end for all HUBP instances (if not gating?)
  46                 * or cache system aperture if using power gating
  47                 */
  48                memcpy(&dc->vm_pa_config, pa_config, sizeof(struct dc_phy_addr_space_config));
  49                dc->vm_pa_config.valid = true;
  50#if defined(CONFIG_DRM_AMD_DC_DCN)
  51                dc_z10_save_init(dc);
  52#endif
  53        }
  54
  55        return num_vmids;
  56}
  57
  58void dc_setup_vm_context(struct dc *dc, struct dc_virtual_addr_space_config *va_config, int vmid)
  59{
  60        dc->hwss.init_vm_ctx(dc->hwseq, dc, va_config, vmid);
  61}
  62
  63int dc_get_vmid_use_vector(struct dc *dc)
  64{
  65        int i;
  66        int in_use = 0;
  67
  68        for (i = 0; i < MAX_HUBP; i++)
  69                in_use |= dc->vm_helper->hubp_vmid_usage[i].vmid_usage[0]
  70                        | dc->vm_helper->hubp_vmid_usage[i].vmid_usage[1];
  71        return in_use;
  72}
  73
  74void vm_helper_init(struct vm_helper *vm_helper, unsigned int num_vmid)
  75{
  76        vm_helper->num_vmid = num_vmid;
  77
  78        memset(vm_helper->hubp_vmid_usage, 0, sizeof(vm_helper->hubp_vmid_usage[0]) * MAX_HUBP);
  79}
  80