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 "iceland_smumgr.h"
 28
 29MODULE_FIRMWARE("amdgpu/topaz_smc.bin");
 30
 31static void iceland_dpm_set_funcs(struct amdgpu_device *adev);
 32
 33static int iceland_dpm_early_init(void *handle)
 34{
 35	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 36
 37	iceland_dpm_set_funcs(adev);
 38
 39	return 0;
 40}
 41
 42static int iceland_dpm_init_microcode(struct amdgpu_device *adev)
 43{
 44	char fw_name[30] = "amdgpu/topaz_smc.bin";
 45	int err;
 46
 47	err = request_firmware(&adev->pm.fw, fw_name, adev->dev);
 48	if (err)
 49		goto out;
 50	err = amdgpu_ucode_validate(adev->pm.fw);
 51
 52out:
 53	if (err) {
 54		DRM_ERROR("Failed to load firmware \"%s\"", fw_name);
 55		release_firmware(adev->pm.fw);
 56		adev->pm.fw = NULL;
 57	}
 58	return err;
 59}
 60
 61static int iceland_dpm_sw_init(void *handle)
 62{
 63	int ret;
 64	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 65
 66	ret = iceland_dpm_init_microcode(adev);
 67	if (ret)
 68		return ret;
 69
 70	return 0;
 71}
 72
 73static int iceland_dpm_sw_fini(void *handle)
 74{
 75	return 0;
 76}
 77
 78static int iceland_dpm_hw_init(void *handle)
 79{
 80	int ret;
 81	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 82
 83	mutex_lock(&adev->pm.mutex);
 84
 85	/* smu init only needs to be called at startup, not resume.
 86	 * It should be in sw_init, but requires the fw info gathered
 87	 * in sw_init from other IP modules.
 88	 */
 89	ret = iceland_smu_init(adev);
 90	if (ret) {
 91		DRM_ERROR("SMU initialization failed\n");
 92		goto fail;
 93	}
 94
 95	ret = iceland_smu_start(adev);
 96	if (ret) {
 97		DRM_ERROR("SMU start failed\n");
 98		goto fail;
 99	}
100
101	mutex_unlock(&adev->pm.mutex);
102	return 0;
103
104fail:
105	adev->firmware.smu_load = false;
106	mutex_unlock(&adev->pm.mutex);
107	return -EINVAL;
108}
109
110static int iceland_dpm_hw_fini(void *handle)
111{
112	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
113
114	mutex_lock(&adev->pm.mutex);
115	/* smu fini only needs to be called at teardown, not suspend.
116	 * It should be in sw_fini, but we put it here for symmetry
117	 * with smu init.
118	 */
119	iceland_smu_fini(adev);
120	mutex_unlock(&adev->pm.mutex);
121	return 0;
122}
123
124static int iceland_dpm_suspend(void *handle)
125{
126	return 0;
127}
128
129static int iceland_dpm_resume(void *handle)
130{
131	int ret;
132	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
133
134	mutex_lock(&adev->pm.mutex);
135
136	ret = iceland_smu_start(adev);
137	if (ret) {
138		DRM_ERROR("SMU start failed\n");
139		goto fail;
140	}
141
142fail:
143	mutex_unlock(&adev->pm.mutex);
144	return ret;
145}
146
147static int iceland_dpm_set_clockgating_state(void *handle,
148			enum amd_clockgating_state state)
149{
150	return 0;
151}
152
153static int iceland_dpm_set_powergating_state(void *handle,
154			enum amd_powergating_state state)
155{
156	return 0;
157}
158
159const struct amd_ip_funcs iceland_dpm_ip_funcs = {
160	.early_init = iceland_dpm_early_init,
161	.late_init = NULL,
162	.sw_init = iceland_dpm_sw_init,
163	.sw_fini = iceland_dpm_sw_fini,
164	.hw_init = iceland_dpm_hw_init,
165	.hw_fini = iceland_dpm_hw_fini,
166	.suspend = iceland_dpm_suspend,
167	.resume = iceland_dpm_resume,
168	.is_idle = NULL,
169	.wait_for_idle = NULL,
170	.soft_reset = NULL,
171	.print_status = NULL,
172	.set_clockgating_state = iceland_dpm_set_clockgating_state,
173	.set_powergating_state = iceland_dpm_set_powergating_state,
174};
175
176static const struct amdgpu_dpm_funcs iceland_dpm_funcs = {
177	.get_temperature = NULL,
178	.pre_set_power_state = NULL,
179	.set_power_state = NULL,
180	.post_set_power_state = NULL,
181	.display_configuration_changed = NULL,
182	.get_sclk = NULL,
183	.get_mclk = NULL,
184	.print_power_state = NULL,
185	.debugfs_print_current_performance_level = NULL,
186	.force_performance_level = NULL,
187	.vblank_too_short = NULL,
188	.powergate_uvd = NULL,
189};
190
191static void iceland_dpm_set_funcs(struct amdgpu_device *adev)
192{
193	if (NULL == adev->pm.funcs)
194		adev->pm.funcs = &iceland_dpm_funcs;
195}