1 // SPDX-License-Identifier: GPL-2.0
11 #include <soc/tegra/bpmp-abi.h>
14 #include "bpmp-private.h"
23 	} tx, rx;  member
28 	} mbox;  member
36 	priv = container_of(client, struct tegra186_bpmp, mbox.client);  in mbox_client_to_bpmp()
38 	return priv->parent;  in mbox_client_to_bpmp()
45 	frame = tegra_ivc_read_get_next_frame(channel->ivc);  in tegra186_bpmp_is_message_ready()
47 		channel->ib = NULL;  in tegra186_bpmp_is_message_ready()
51 	channel->ib = frame;  in tegra186_bpmp_is_message_ready()
60 	frame = tegra_ivc_write_get_next_frame(channel->ivc);  in tegra186_bpmp_is_channel_free()
62 		channel->ob = NULL;  in tegra186_bpmp_is_channel_free()
66 	channel->ob = frame;  in tegra186_bpmp_is_channel_free()
73 	return tegra_ivc_read_advance(channel->ivc);  in tegra186_bpmp_ack_message()
78 	return tegra_ivc_write_advance(channel->ivc);  in tegra186_bpmp_post_message()
83 	struct tegra186_bpmp *priv = bpmp->priv;  in tegra186_bpmp_ring_doorbell()
86 	err = mbox_send_message(priv->mbox.channel, NULL);  in tegra186_bpmp_ring_doorbell()
90 	mbox_client_txdone(priv->mbox.channel, 0);  in tegra186_bpmp_ring_doorbell()
98 	struct tegra186_bpmp *priv = bpmp->priv;  in tegra186_bpmp_ivc_notify()
100 	if (WARN_ON(priv->mbox.channel == NULL))  in tegra186_bpmp_ivc_notify()
110 	struct tegra186_bpmp *priv = bpmp->priv;  in tegra186_bpmp_channel_init()
115 	channel->ivc = devm_kzalloc(bpmp->dev, sizeof(*channel->ivc),  in tegra186_bpmp_channel_init()
117 	if (!channel->ivc)  in tegra186_bpmp_channel_init()
118 		return -ENOMEM;  in tegra186_bpmp_channel_init()
124 	err = tegra_ivc_init(channel->ivc, NULL,  in tegra186_bpmp_channel_init()
125 			     priv->rx.virt + offset, priv->rx.phys + offset,  in tegra186_bpmp_channel_init()
126 			     priv->tx.virt + offset, priv->tx.phys + offset,  in tegra186_bpmp_channel_init()
130 		dev_err(bpmp->dev, "failed to setup IVC for channel %u: %d\n",  in tegra186_bpmp_channel_init()
135 	init_completion(&channel->completion);  in tegra186_bpmp_channel_init()
136 	channel->bpmp = bpmp;  in tegra186_bpmp_channel_init()
144 	tegra_ivc_reset(channel->ivc);  in tegra186_bpmp_channel_reset()
147 	while (tegra_ivc_notified(channel->ivc))  in tegra186_bpmp_channel_reset()
153 	tegra_ivc_cleanup(channel->ivc);  in tegra186_bpmp_channel_cleanup()
169 	priv = devm_kzalloc(bpmp->dev, sizeof(*priv), GFP_KERNEL);  in tegra186_bpmp_init()
171 		return -ENOMEM;  in tegra186_bpmp_init()
173 	bpmp->priv = priv;  in tegra186_bpmp_init()
174 	priv->parent = bpmp;  in tegra186_bpmp_init()
176 	priv->tx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 0);  in tegra186_bpmp_init()
177 	if (!priv->tx.pool) {  in tegra186_bpmp_init()
178 		dev_err(bpmp->dev, "TX shmem pool not found\n");  in tegra186_bpmp_init()
179 		return -EPROBE_DEFER;  in tegra186_bpmp_init()
182 	priv->tx.virt = gen_pool_dma_alloc(priv->tx.pool, 4096, &priv->tx.phys);  in tegra186_bpmp_init()
183 	if (!priv->tx.virt) {  in tegra186_bpmp_init()
184 		dev_err(bpmp->dev, "failed to allocate from TX pool\n");  in tegra186_bpmp_init()
185 		return -ENOMEM;  in tegra186_bpmp_init()
188 	priv->rx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 1);  in tegra186_bpmp_init()
189 	if (!priv->rx.pool) {  in tegra186_bpmp_init()
190 		dev_err(bpmp->dev, "RX shmem pool not found\n");  in tegra186_bpmp_init()
191 		err = -EPROBE_DEFER;  in tegra186_bpmp_init()
195 	priv->rx.virt = gen_pool_dma_alloc(priv->rx.pool, 4096, &priv->rx.phys);  in tegra186_bpmp_init()
196 	if (!priv->rx.virt) {  in tegra186_bpmp_init()
197 		dev_err(bpmp->dev, "failed to allocate from RX pool\n");  in tegra186_bpmp_init()
198 		err = -ENOMEM;  in tegra186_bpmp_init()
202 	err = tegra186_bpmp_channel_init(bpmp->tx_channel, bpmp,  in tegra186_bpmp_init()
203 					 bpmp->soc->channels.cpu_tx.offset);  in tegra186_bpmp_init()
207 	err = tegra186_bpmp_channel_init(bpmp->rx_channel, bpmp,  in tegra186_bpmp_init()
208 					 bpmp->soc->channels.cpu_rx.offset);  in tegra186_bpmp_init()
212 	for (i = 0; i < bpmp->threaded.count; i++) {  in tegra186_bpmp_init()
213 		unsigned int index = bpmp->soc->channels.thread.offset + i;  in tegra186_bpmp_init()
215 		err = tegra186_bpmp_channel_init(&bpmp->threaded_channels[i],  in tegra186_bpmp_init()
221 	/* mbox registration */  in tegra186_bpmp_init()
222 	priv->mbox.client.dev = bpmp->dev;  in tegra186_bpmp_init()
223 	priv->mbox.client.rx_callback = mbox_handle_rx;  in tegra186_bpmp_init()
224 	priv->mbox.client.tx_block = false;  in tegra186_bpmp_init()
225 	priv->mbox.client.knows_txdone = false;  in tegra186_bpmp_init()
227 	priv->mbox.channel = mbox_request_channel(&priv->mbox.client, 0);  in tegra186_bpmp_init()
228 	if (IS_ERR(priv->mbox.channel)) {  in tegra186_bpmp_init()
229 		err = PTR_ERR(priv->mbox.channel);  in tegra186_bpmp_init()
230 		dev_err(bpmp->dev, "failed to get HSP mailbox: %d\n", err);  in tegra186_bpmp_init()
234 	tegra186_bpmp_channel_reset(bpmp->tx_channel);  in tegra186_bpmp_init()
235 	tegra186_bpmp_channel_reset(bpmp->rx_channel);  in tegra186_bpmp_init()
237 	for (i = 0; i < bpmp->threaded.count; i++)  in tegra186_bpmp_init()
238 		tegra186_bpmp_channel_reset(&bpmp->threaded_channels[i]);  in tegra186_bpmp_init()
243 	for (i = 0; i < bpmp->threaded.count; i++) {  in tegra186_bpmp_init()
244 		if (!bpmp->threaded_channels[i].bpmp)  in tegra186_bpmp_init()
247 		tegra186_bpmp_channel_cleanup(&bpmp->threaded_channels[i]);  in tegra186_bpmp_init()
250 	tegra186_bpmp_channel_cleanup(bpmp->rx_channel);  in tegra186_bpmp_init()
252 	tegra186_bpmp_channel_cleanup(bpmp->tx_channel);  in tegra186_bpmp_init()
254 	gen_pool_free(priv->rx.pool, (unsigned long)priv->rx.virt, 4096);  in tegra186_bpmp_init()
256 	gen_pool_free(priv->tx.pool, (unsigned long)priv->tx.virt, 4096);  in tegra186_bpmp_init()
263 	struct tegra186_bpmp *priv = bpmp->priv;  in tegra186_bpmp_deinit()
266 	mbox_free_channel(priv->mbox.channel);  in tegra186_bpmp_deinit()
268 	for (i = 0; i < bpmp->threaded.count; i++)  in tegra186_bpmp_deinit()
269 		tegra186_bpmp_channel_cleanup(&bpmp->threaded_channels[i]);  in tegra186_bpmp_deinit()
271 	tegra186_bpmp_channel_cleanup(bpmp->rx_channel);  in tegra186_bpmp_deinit()
272 	tegra186_bpmp_channel_cleanup(bpmp->tx_channel);  in tegra186_bpmp_deinit()
274 	gen_pool_free(priv->rx.pool, (unsigned long)priv->rx.virt, 4096);  in tegra186_bpmp_deinit()
275 	gen_pool_free(priv->tx.pool, (unsigned long)priv->tx.virt, 4096);  in tegra186_bpmp_deinit()
283 	tegra186_bpmp_channel_reset(bpmp->tx_channel);  in tegra186_bpmp_resume()
284 	tegra186_bpmp_channel_reset(bpmp->rx_channel);  in tegra186_bpmp_resume()
286 	for (i = 0; i < bpmp->threaded.count; i++)  in tegra186_bpmp_resume()
287 		tegra186_bpmp_channel_reset(&bpmp->threaded_channels[i]);  in tegra186_bpmp_resume()