1/*
  2 * Copyright 2014 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 */
 23
 24#include <linux/firmware.h>
 25#include "drmP.h"
 26#include "amdgpu.h"
 27#include "tonga_smum.h"
 28
 29MODULE_FIRMWARE("amdgpu/tonga_smc.bin");
 30
 31static void tonga_dpm_set_funcs(struct amdgpu_device *adev);
 32
 33static int tonga_dpm_early_init(void *handle)
 34{
 35	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 36
 37	tonga_dpm_set_funcs(adev);
 38
 39	return 0;
 40}
 41
 42static int tonga_dpm_init_microcode(struct amdgpu_device *adev)
 43{
 44	char fw_name[30] = "amdgpu/tonga_smc.bin";
 45	int err;
 46	err = request_firmware(&adev->pm.fw, fw_name, adev->dev);
 47	if (err)
 48		goto out;
 49	err = amdgpu_ucode_validate(adev->pm.fw);
 50
 51out:
 52	if (err) {
 53		DRM_ERROR("Failed to load firmware \"%s\"", fw_name);
 54		release_firmware(adev->pm.fw);
 55		adev->pm.fw = NULL;
 56	}
 57	return err;
 58}
 59
 60static int tonga_dpm_sw_init(void *handle)
 61{
 62	int ret;
 63	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 64
 65	ret = tonga_dpm_init_microcode(adev);
 66	if (ret)
 67		return ret;
 68
 69	return 0;
 70}
 71
 72static int tonga_dpm_sw_fini(void *handle)
 73{
 74	return 0;
 75}
 76
 77static int tonga_dpm_hw_init(void *handle)
 78{
 79	int ret;
 80	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 81
 82	mutex_lock(&adev->pm.mutex);
 83
 84	/* smu init only needs to be called at startup, not resume.
 85	 * It should be in sw_init, but requires the fw info gathered
 86	 * in sw_init from other IP modules.
 87	 */
 88	ret = tonga_smu_init(adev);
 89	if (ret) {
 90		DRM_ERROR("SMU initialization failed\n");
 91		goto fail;
 92	}
 93
 94	ret = tonga_smu_start(adev);
 95	if (ret) {
 96		DRM_ERROR("SMU start failed\n");
 97		goto fail;
 98	}
 99
100	mutex_unlock(&adev->pm.mutex);
101	return 0;
102
103fail:
104	adev->firmware.smu_load = false;
105	mutex_unlock(&adev->pm.mutex);
106	return -EINVAL;
107}
108
109static int tonga_dpm_hw_fini(void *handle)
110{
111	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
112
113	mutex_lock(&adev->pm.mutex);
114	/* smu fini only needs to be called at teardown, not suspend.
115	 * It should be in sw_fini, but we put it here for symmetry
116	 * with smu init.
117	 */
118	tonga_smu_fini(adev);
119	mutex_unlock(&adev->pm.mutex);
120	return 0;
121}
122
123static int tonga_dpm_suspend(void *handle)
124{
125	return tonga_dpm_hw_fini(handle);
126}
127
128static int tonga_dpm_resume(void *handle)
129{
130	return tonga_dpm_hw_init(handle);
131}
132
133static int tonga_dpm_set_clockgating_state(void *handle,
134			enum amd_clockgating_state state)
135{
136	return 0;
137}
138
139static int tonga_dpm_set_powergating_state(void *handle,
140			enum amd_powergating_state state)
141{
142	return 0;
143}
144
145const struct amd_ip_funcs tonga_dpm_ip_funcs = {
146	.early_init = tonga_dpm_early_init,
147	.late_init = NULL,
148	.sw_init = tonga_dpm_sw_init,
149	.sw_fini = tonga_dpm_sw_fini,
150	.hw_init = tonga_dpm_hw_init,
151	.hw_fini = tonga_dpm_hw_fini,
152	.suspend = tonga_dpm_suspend,
153	.resume = tonga_dpm_resume,
154	.is_idle = NULL,
155	.wait_for_idle = NULL,
156	.soft_reset = NULL,
157	.print_status = NULL,
158	.set_clockgating_state = tonga_dpm_set_clockgating_state,
159	.set_powergating_state = tonga_dpm_set_powergating_state,
160};
161
162static const struct amdgpu_dpm_funcs tonga_dpm_funcs = {
163	.get_temperature = NULL,
164	.pre_set_power_state = NULL,
165	.set_power_state = NULL,
166	.post_set_power_state = NULL,
167	.display_configuration_changed = NULL,
168	.get_sclk = NULL,
169	.get_mclk = NULL,
170	.print_power_state = NULL,
171	.debugfs_print_current_performance_level = NULL,
172	.force_performance_level = NULL,
173	.vblank_too_short = NULL,
174	.powergate_uvd = NULL,
175};
176
177static void tonga_dpm_set_funcs(struct amdgpu_device *adev)
178{
179	if (NULL == adev->pm.funcs)
180		adev->pm.funcs = &tonga_dpm_funcs;
181}