nvkm/core/subdev.c

24 #include <core/subdev.h>
27 #include <subdev/mc.h>
39 nvkm_subdev_intr(struct nvkm_subdev *subdev)
41 	if (subdev->func->intr)
42 		subdev->func->intr(subdev);
46 nvkm_subdev_info(struct nvkm_subdev *subdev, u64 mthd, u64 *data)
48 	if (subdev->func->info)
49 		return subdev->func->info(subdev, mthd, data);
54 nvkm_subdev_fini(struct nvkm_subdev *subdev, bool suspend)
56 	struct nvkm_device *device = subdev->device;
57 	const char *action = suspend ? "suspend" : subdev->use.enabled ? "fini" : "reset";
60 	nvkm_trace(subdev, "%s running...\n", action);
63 	if (subdev->func->fini) {
64 		int ret = subdev->func->fini(subdev, suspend);
66 			nvkm_error(subdev, "%s failed, %d\n", action, ret);
71 	subdev->use.enabled = false;
73 	nvkm_mc_reset(device, subdev->type, subdev->inst);
76 	nvkm_trace(subdev, "%s completed in %lldus\n", action, time);
81 nvkm_subdev_preinit(struct nvkm_subdev *subdev)
85 	nvkm_trace(subdev, "preinit running...\n");
88 	if (subdev->func->preinit) {
89 		int ret = subdev->func->preinit(subdev);
91 			nvkm_error(subdev, "preinit failed, %d\n", ret);
97 	nvkm_trace(subdev, "preinit completed in %lldus\n", time);
102 nvkm_subdev_oneinit_(struct nvkm_subdev *subdev)
107 	if (!subdev->func->oneinit || subdev->oneinit)
110 	nvkm_trace(subdev, "one-time init running...\n");
112 	ret = subdev->func->oneinit(subdev);
114 		nvkm_error(subdev, "one-time init failed, %d\n", ret);
118 	subdev->oneinit = true;
120 	nvkm_trace(subdev, "one-time init completed in %lldus\n", time);
125 nvkm_subdev_init_(struct nvkm_subdev *subdev)
130 	if (subdev->use.enabled) {
131 		nvkm_trace(subdev, "init skipped, already running\n");
135 	nvkm_trace(subdev, "init running...\n");
138 	ret = nvkm_subdev_oneinit_(subdev);
142 	subdev->use.enabled = true;
144 	if (subdev->func->init) {
145 		ret = subdev->func->init(subdev);
147 			nvkm_error(subdev, "init failed, %d\n", ret);
153 	nvkm_trace(subdev, "init completed in %lldus\n", time);
158 nvkm_subdev_init(struct nvkm_subdev *subdev)
162 	mutex_lock(&subdev->use.mutex);
163 	if (refcount_read(&subdev->use.refcount) == 0) {
164 		nvkm_trace(subdev, "init skipped, no users\n");
165 		mutex_unlock(&subdev->use.mutex);
169 	ret = nvkm_subdev_init_(subdev);
170 	mutex_unlock(&subdev->use.mutex);
175 nvkm_subdev_oneinit(struct nvkm_subdev *subdev)
179 	mutex_lock(&subdev->use.mutex);
180 	ret = nvkm_subdev_oneinit_(subdev);
181 	mutex_unlock(&subdev->use.mutex);
186 nvkm_subdev_unref(struct nvkm_subdev *subdev)
188 	if (refcount_dec_and_mutex_lock(&subdev->use.refcount, &subdev->use.mutex)) {
189 		nvkm_subdev_fini(subdev, false);
190 		mutex_unlock(&subdev->use.mutex);
195 nvkm_subdev_ref(struct nvkm_subdev *subdev)
199 	if (subdev && !refcount_inc_not_zero(&subdev->use.refcount)) {
200 		mutex_lock(&subdev->use.mutex);
201 		if (!refcount_inc_not_zero(&subdev->use.refcount)) {
202 			if ((ret = nvkm_subdev_init_(subdev))) {
203 				mutex_unlock(&subdev->use.mutex);
207 			refcount_set(&subdev->use.refcount, 1);
209 		mutex_unlock(&subdev->use.mutex);
218 	struct nvkm_subdev *subdev = *psubdev;
221 	if (subdev && !WARN_ON(!subdev->func)) {
222 		nvkm_trace(subdev, "destroy running...\n");
224 		list_del(&subdev->head);
225 		if (subdev->func->dtor)
226 			*psubdev = subdev->func->dtor(subdev);
227 		mutex_destroy(&subdev->use.mutex);
229 		nvkm_trace(subdev, "destroy completed in %lldus\n", time);
238 	struct nvkm_subdev *subdev;
239 	list_for_each_entry(subdev, &device->subdev, head) {
240 		if (subdev->type == type && subdev->inst == inst) {
241 			*subdev->pself = NULL;
242 			nvkm_subdev_del(&subdev);
250 		   enum nvkm_subdev_type type, int inst, struct nvkm_subdev *subdev)
252 	subdev->func = func;
253 	subdev->device = device;
254 	subdev->type = type;
255 	subdev->inst = inst < 0 ? 0 : inst;
258 		snprintf(subdev->name, sizeof(subdev->name), "%s%d", nvkm_subdev_type[type], inst);
260 		strscpy(subdev->name, nvkm_subdev_type[type], sizeof(subdev->name));
261 	subdev->debug = nvkm_dbgopt(device->dbgopt, subdev->name);
263 	refcount_set(&subdev->use.refcount, 1);
264 	list_add_tail(&subdev->head, &device->subdev);