Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (c) 2018, NVIDIA CORPORATION.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/genalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/mailbox_client.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <soc/tegra/bpmp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <soc/tegra/bpmp-abi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <soc/tegra/ivc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "bpmp-private.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) struct tegra186_bpmp {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	struct tegra_bpmp *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 		struct gen_pool *pool;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 		dma_addr_t phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 		void *virt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	} tx, rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 		struct mbox_client client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		struct mbox_chan *channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	} mbox;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) static inline struct tegra_bpmp *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) mbox_client_to_bpmp(struct mbox_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	struct tegra186_bpmp *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	priv = container_of(client, struct tegra186_bpmp, mbox.client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	return priv->parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) static bool tegra186_bpmp_is_message_ready(struct tegra_bpmp_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	void *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	frame = tegra_ivc_read_get_next_frame(channel->ivc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	if (IS_ERR(frame)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		channel->ib = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	channel->ib = frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) static bool tegra186_bpmp_is_channel_free(struct tegra_bpmp_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	void *frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	frame = tegra_ivc_write_get_next_frame(channel->ivc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	if (IS_ERR(frame)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		channel->ob = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	channel->ob = frame;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static int tegra186_bpmp_ack_message(struct tegra_bpmp_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	return tegra_ivc_read_advance(channel->ivc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) static int tegra186_bpmp_post_message(struct tegra_bpmp_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	return tegra_ivc_write_advance(channel->ivc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static int tegra186_bpmp_ring_doorbell(struct tegra_bpmp *bpmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct tegra186_bpmp *priv = bpmp->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	err = mbox_send_message(priv->mbox.channel, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	mbox_client_txdone(priv->mbox.channel, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) static void tegra186_bpmp_ivc_notify(struct tegra_ivc *ivc, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct tegra_bpmp *bpmp = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	struct tegra186_bpmp *priv = bpmp->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	if (WARN_ON(priv->mbox.channel == NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	tegra186_bpmp_ring_doorbell(bpmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int tegra186_bpmp_channel_init(struct tegra_bpmp_channel *channel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 				      struct tegra_bpmp *bpmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 				      unsigned int index)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	struct tegra186_bpmp *priv = bpmp->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	size_t message_size, queue_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	unsigned int offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	channel->ivc = devm_kzalloc(bpmp->dev, sizeof(*channel->ivc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 				    GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (!channel->ivc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	message_size = tegra_ivc_align(MSG_MIN_SZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	queue_size = tegra_ivc_total_queue_size(message_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	offset = queue_size * index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	err = tegra_ivc_init(channel->ivc, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 			     priv->rx.virt + offset, priv->rx.phys + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 			     priv->tx.virt + offset, priv->tx.phys + offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			     1, message_size, tegra186_bpmp_ivc_notify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 			     bpmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	if (err < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		dev_err(bpmp->dev, "failed to setup IVC for channel %u: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			index, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	init_completion(&channel->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	channel->bpmp = bpmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static void tegra186_bpmp_channel_reset(struct tegra_bpmp_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	/* reset the channel state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	tegra_ivc_reset(channel->ivc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	/* sync the channel state with BPMP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	while (tegra_ivc_notified(channel->ivc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static void tegra186_bpmp_channel_cleanup(struct tegra_bpmp_channel *channel)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	tegra_ivc_cleanup(channel->ivc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) static void mbox_handle_rx(struct mbox_client *client, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	struct tegra_bpmp *bpmp = mbox_client_to_bpmp(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	tegra_bpmp_handle_rx(bpmp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static int tegra186_bpmp_init(struct tegra_bpmp *bpmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	struct tegra186_bpmp *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	priv = devm_kzalloc(bpmp->dev, sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	bpmp->priv = priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	priv->parent = bpmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	priv->tx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	if (!priv->tx.pool) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		dev_err(bpmp->dev, "TX shmem pool not found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	priv->tx.virt = gen_pool_dma_alloc(priv->tx.pool, 4096, &priv->tx.phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	if (!priv->tx.virt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		dev_err(bpmp->dev, "failed to allocate from TX pool\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	priv->rx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	if (!priv->rx.pool) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		dev_err(bpmp->dev, "RX shmem pool not found\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		err = -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		goto free_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	priv->rx.virt = gen_pool_dma_alloc(priv->rx.pool, 4096, &priv->rx.phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	if (!priv->rx.virt) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 		dev_err(bpmp->dev, "failed to allocate from RX pool\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		goto free_tx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	err = tegra186_bpmp_channel_init(bpmp->tx_channel, bpmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 					 bpmp->soc->channels.cpu_tx.offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		goto free_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	err = tegra186_bpmp_channel_init(bpmp->rx_channel, bpmp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 					 bpmp->soc->channels.cpu_rx.offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		goto cleanup_tx_channel;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	for (i = 0; i < bpmp->threaded.count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		unsigned int index = bpmp->soc->channels.thread.offset + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		err = tegra186_bpmp_channel_init(&bpmp->threaded_channels[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 						 bpmp, index);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			goto cleanup_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	/* mbox registration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	priv->mbox.client.dev = bpmp->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	priv->mbox.client.rx_callback = mbox_handle_rx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	priv->mbox.client.tx_block = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	priv->mbox.client.knows_txdone = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	priv->mbox.channel = mbox_request_channel(&priv->mbox.client, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	if (IS_ERR(priv->mbox.channel)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		err = PTR_ERR(priv->mbox.channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		dev_err(bpmp->dev, "failed to get HSP mailbox: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		goto cleanup_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	tegra186_bpmp_channel_reset(bpmp->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	tegra186_bpmp_channel_reset(bpmp->rx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	for (i = 0; i < bpmp->threaded.count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		tegra186_bpmp_channel_reset(&bpmp->threaded_channels[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) cleanup_channels:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	for (i = 0; i < bpmp->threaded.count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 		if (!bpmp->threaded_channels[i].bpmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		tegra186_bpmp_channel_cleanup(&bpmp->threaded_channels[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	tegra186_bpmp_channel_cleanup(bpmp->rx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) cleanup_tx_channel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	tegra186_bpmp_channel_cleanup(bpmp->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) free_rx:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	gen_pool_free(priv->rx.pool, (unsigned long)priv->rx.virt, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) free_tx:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	gen_pool_free(priv->tx.pool, (unsigned long)priv->tx.virt, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static void tegra186_bpmp_deinit(struct tegra_bpmp *bpmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	struct tegra186_bpmp *priv = bpmp->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	mbox_free_channel(priv->mbox.channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	for (i = 0; i < bpmp->threaded.count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		tegra186_bpmp_channel_cleanup(&bpmp->threaded_channels[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	tegra186_bpmp_channel_cleanup(bpmp->rx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	tegra186_bpmp_channel_cleanup(bpmp->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	gen_pool_free(priv->rx.pool, (unsigned long)priv->rx.virt, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	gen_pool_free(priv->tx.pool, (unsigned long)priv->tx.virt, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) static int tegra186_bpmp_resume(struct tegra_bpmp *bpmp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	/* reset message channels */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	tegra186_bpmp_channel_reset(bpmp->tx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	tegra186_bpmp_channel_reset(bpmp->rx_channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	for (i = 0; i < bpmp->threaded.count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		tegra186_bpmp_channel_reset(&bpmp->threaded_channels[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) const struct tegra_bpmp_ops tegra186_bpmp_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	.init = tegra186_bpmp_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	.deinit = tegra186_bpmp_deinit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	.is_response_ready = tegra186_bpmp_is_message_ready,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	.is_request_ready = tegra186_bpmp_is_message_ready,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	.ack_response = tegra186_bpmp_ack_message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	.ack_request = tegra186_bpmp_ack_message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	.is_response_channel_free = tegra186_bpmp_is_channel_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	.is_request_channel_free = tegra186_bpmp_is_channel_free,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	.post_response = tegra186_bpmp_post_message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	.post_request = tegra186_bpmp_post_message,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	.ring_doorbell = tegra186_bpmp_ring_doorbell,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	.resume = tegra186_bpmp_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) };