Merge tag 'tegra-for-5.1-firmware' of...

Merge tag 'tegra-for-5.1-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

firmware: tegra: Changes for v5.1-rc1

These changes add support for BPMP on Tegra210.

* tag 'tegra-for-5.1-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  firmware/tegra: Enable Tegra186 BPMP support on Tegra194
  firmware: tegra: Conditionally support SoC generations
  firmware: tegra: bpmp-tegra186: Remove unused includes
  firmware: tegra: add bpmp driver for Tegra210
  firmware: tegra: Refactor BPMP driver
  firmware: tegra: Reword messaging terminology
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/firmware/tegra/Makefile

 tegra-bpmp-y			= bpmp.o
+tegra-bpmp-$(CONFIG_ARCH_TEGRA_210_SOC)	+= bpmp-tegra210.o
+tegra-bpmp-$(CONFIG_ARCH_TEGRA_186_SOC)	+= bpmp-tegra186.o
+tegra-bpmp-$(CONFIG_ARCH_TEGRA_194_SOC)	+= bpmp-tegra186.o
 tegra-bpmp-$(CONFIG_DEBUG_FS)	+= bpmp-debugfs.o
 obj-$(CONFIG_TEGRA_BPMP)	+= tegra-bpmp.o
 obj-$(CONFIG_TEGRA_IVC)		+= ivc.o

drivers/firmware/tegra/bpmp-private.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.
+ */
+
+#ifndef __FIRMWARE_TEGRA_BPMP_PRIVATE_H
+#define __FIRMWARE_TEGRA_BPMP_PRIVATE_H
+
+#include <soc/tegra/bpmp.h>
+
+struct tegra_bpmp_ops {
+	int (*init)(struct tegra_bpmp *bpmp);
+	void (*deinit)(struct tegra_bpmp *bpmp);
+	bool (*is_response_ready)(struct tegra_bpmp_channel *channel);
+	bool (*is_request_ready)(struct tegra_bpmp_channel *channel);
+	int (*ack_response)(struct tegra_bpmp_channel *channel);
+	int (*ack_request)(struct tegra_bpmp_channel *channel);
+	bool (*is_response_channel_free)(struct tegra_bpmp_channel *channel);
+	bool (*is_request_channel_free)(struct tegra_bpmp_channel *channel);
+	int (*post_response)(struct tegra_bpmp_channel *channel);
+	int (*post_request)(struct tegra_bpmp_channel *channel);
+	int (*ring_doorbell)(struct tegra_bpmp *bpmp);
+	int (*resume)(struct tegra_bpmp *bpmp);
+};
+
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_186_SOC) || \
+    IS_ENABLED(CONFIG_ARCH_TEGRA_194_SOC)
+extern const struct tegra_bpmp_ops tegra186_bpmp_ops;
+#endif
+#if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC)
+extern const struct tegra_bpmp_ops tegra210_bpmp_ops;
+#endif
+
+#endif

drivers/firmware/tegra/bpmp-tegra186.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.
+ */
+
+#include <linux/genalloc.h>
+#include <linux/mailbox_client.h>
+#include <linux/platform_device.h>
+
+#include <soc/tegra/bpmp.h>
+#include <soc/tegra/bpmp-abi.h>
+#include <soc/tegra/ivc.h>
+
+#include "bpmp-private.h"
+
+struct tegra186_bpmp {
+	struct tegra_bpmp *parent;
+
+	struct {
+		struct gen_pool *pool;
+		dma_addr_t phys;
+		void *virt;
+	} tx, rx;
+
+	struct {
+		struct mbox_client client;
+		struct mbox_chan *channel;
+	} mbox;
+};
+
+static inline struct tegra_bpmp *
+mbox_client_to_bpmp(struct mbox_client *client)
+{
+	struct tegra186_bpmp *priv;
+
+	priv = container_of(client, struct tegra186_bpmp, mbox.client);
+
+	return priv->parent;
+}
+
+static bool tegra186_bpmp_is_message_ready(struct tegra_bpmp_channel *channel)
+{
+	void *frame;
+
+	frame = tegra_ivc_read_get_next_frame(channel->ivc);
+	if (IS_ERR(frame)) {
+		channel->ib = NULL;
+		return false;
+	}
+
+	channel->ib = frame;
+
+	return true;
+}
+
+static bool tegra186_bpmp_is_channel_free(struct tegra_bpmp_channel *channel)
+{
+	void *frame;
+
+	frame = tegra_ivc_write_get_next_frame(channel->ivc);
+	if (IS_ERR(frame)) {
+		channel->ob = NULL;
+		return false;
+	}
+
+	channel->ob = frame;
+
+	return true;
+}
+
+static int tegra186_bpmp_ack_message(struct tegra_bpmp_channel *channel)
+{
+	return tegra_ivc_read_advance(channel->ivc);
+}
+
+static int tegra186_bpmp_post_message(struct tegra_bpmp_channel *channel)
+{
+	return tegra_ivc_write_advance(channel->ivc);
+}
+
+static int tegra186_bpmp_ring_doorbell(struct tegra_bpmp *bpmp)
+{
+	struct tegra186_bpmp *priv = bpmp->priv;
+	int err;
+
+	err = mbox_send_message(priv->mbox.channel, NULL);
+	if (err < 0)
+		return err;
+
+	mbox_client_txdone(priv->mbox.channel, 0);
+
+	return 0;
+}
+
+static void tegra186_bpmp_ivc_notify(struct tegra_ivc *ivc, void *data)
+{
+	struct tegra_bpmp *bpmp = data;
+	struct tegra186_bpmp *priv = bpmp->priv;
+
+	if (WARN_ON(priv->mbox.channel == NULL))
+		return;
+
+	tegra186_bpmp_ring_doorbell(bpmp);
+}
+
+static int tegra186_bpmp_channel_init(struct tegra_bpmp_channel *channel,
+				      struct tegra_bpmp *bpmp,
+				      unsigned int index)
+{
+	struct tegra186_bpmp *priv = bpmp->priv;
+	size_t message_size, queue_size;
+	unsigned int offset;
+	int err;
+
+	channel->ivc = devm_kzalloc(bpmp->dev, sizeof(*channel->ivc),
+				    GFP_KERNEL);
+	if (!channel->ivc)
+		return -ENOMEM;
+
+	message_size = tegra_ivc_align(MSG_MIN_SZ);
+	queue_size = tegra_ivc_total_queue_size(message_size);
+	offset = queue_size * index;
+
+	err = tegra_ivc_init(channel->ivc, NULL,
+			     priv->rx.virt + offset, priv->rx.phys + offset,
+			     priv->tx.virt + offset, priv->tx.phys + offset,
+			     1, message_size, tegra186_bpmp_ivc_notify,
+			     bpmp);
+	if (err < 0) {
+		dev_err(bpmp->dev, "failed to setup IVC for channel %u: %d\n",
+			index, err);
+		return err;
+	}
+
+	init_completion(&channel->completion);
+	channel->bpmp = bpmp;
+
+	return 0;
+}
+
+static void tegra186_bpmp_channel_reset(struct tegra_bpmp_channel *channel)
+{
+	/* reset the channel state */
+	tegra_ivc_reset(channel->ivc);
+
+	/* sync the channel state with BPMP */
+	while (tegra_ivc_notified(channel->ivc))
+		;
+}
+
+static void tegra186_bpmp_channel_cleanup(struct tegra_bpmp_channel *channel)
+{
+	tegra_ivc_cleanup(channel->ivc);
+}
+
+static void mbox_handle_rx(struct mbox_client *client, void *data)
+{
+	struct tegra_bpmp *bpmp = mbox_client_to_bpmp(client);
+
+	tegra_bpmp_handle_rx(bpmp);
+}
+
+static int tegra186_bpmp_init(struct tegra_bpmp *bpmp)
+{
+	struct tegra186_bpmp *priv;
+	unsigned int i;
+	int err;
+
+	priv = devm_kzalloc(bpmp->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	bpmp->priv = priv;
+	priv->parent = bpmp;
+
+	priv->tx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 0);
+	if (!priv->tx.pool) {
+		dev_err(bpmp->dev, "TX shmem pool not found\n");
+		return -ENOMEM;
+	}
+
+	priv->tx.virt = gen_pool_dma_alloc(priv->tx.pool, 4096, &priv->tx.phys);
+	if (!priv->tx.virt) {
+		dev_err(bpmp->dev, "failed to allocate from TX pool\n");
+		return -ENOMEM;
+	}
+
+	priv->rx.pool = of_gen_pool_get(bpmp->dev->of_node, "shmem", 1);
+	if (!priv->rx.pool) {
+		dev_err(bpmp->dev, "RX shmem pool not found\n");
+		err = -ENOMEM;
+		goto free_tx;
+	}
+
+	priv->rx.virt = gen_pool_dma_alloc(priv->rx.pool, 4096, &priv->rx.phys);
+	if (!priv->rx.virt) {
+		dev_err(bpmp->dev, "failed to allocate from RX pool\n");
+		err = -ENOMEM;
+		goto free_tx;
+	}
+
+	err = tegra186_bpmp_channel_init(bpmp->tx_channel, bpmp,
+					 bpmp->soc->channels.cpu_tx.offset);
+	if (err < 0)
+		goto free_rx;
+
+	err = tegra186_bpmp_channel_init(bpmp->rx_channel, bpmp,
+					 bpmp->soc->channels.cpu_rx.offset);
+	if (err < 0)
+		goto cleanup_tx_channel;
+
+	for (i = 0; i < bpmp->threaded.count; i++) {
+		unsigned int index = bpmp->soc->channels.thread.offset + i;
+
+		err = tegra186_bpmp_channel_init(&bpmp->threaded_channels[i],
+						 bpmp, index);
+		if (err < 0)
+			goto cleanup_channels;
+	}
+
+	/* mbox registration */
+	priv->mbox.client.dev = bpmp->dev;
+	priv->mbox.client.rx_callback = mbox_handle_rx;
+	priv->mbox.client.tx_block = false;
+	priv->mbox.client.knows_txdone = false;
+
+	priv->mbox.channel = mbox_request_channel(&priv->mbox.client, 0);
+	if (IS_ERR(priv->mbox.channel)) {
+		err = PTR_ERR(priv->mbox.channel);
+		dev_err(bpmp->dev, "failed to get HSP mailbox: %d\n", err);
+		goto cleanup_channels;
+	}
+
+	tegra186_bpmp_channel_reset(bpmp->tx_channel);
+	tegra186_bpmp_channel_reset(bpmp->rx_channel);
+
+	for (i = 0; i < bpmp->threaded.count; i++)
+		tegra186_bpmp_channel_reset(&bpmp->threaded_channels[i]);
+
+	return 0;
+
+cleanup_channels:
+	for (i = 0; i < bpmp->threaded.count; i++) {
+		if (!bpmp->threaded_channels[i].bpmp)
+			continue;
+
+		tegra186_bpmp_channel_cleanup(&bpmp->threaded_channels[i]);
+	}
+
+	tegra186_bpmp_channel_cleanup(bpmp->rx_channel);
+cleanup_tx_channel:
+	tegra186_bpmp_channel_cleanup(bpmp->tx_channel);
+free_rx:
+	gen_pool_free(priv->rx.pool, (unsigned long)priv->rx.virt, 4096);
+free_tx:
+	gen_pool_free(priv->tx.pool, (unsigned long)priv->tx.virt, 4096);
+
+	return err;
+}
+
+static void tegra186_bpmp_deinit(struct tegra_bpmp *bpmp)
+{
+	struct tegra186_bpmp *priv = bpmp->priv;
+	unsigned int i;
+
+	mbox_free_channel(priv->mbox.channel);
+
+	for (i = 0; i < bpmp->threaded.count; i++)
+		tegra186_bpmp_channel_cleanup(&bpmp->threaded_channels[i]);
+
+	tegra186_bpmp_channel_cleanup(bpmp->rx_channel);
+	tegra186_bpmp_channel_cleanup(bpmp->tx_channel);
+
+	gen_pool_free(priv->rx.pool, (unsigned long)priv->rx.virt, 4096);
+	gen_pool_free(priv->tx.pool, (unsigned long)priv->tx.virt, 4096);
+}
+
+static int tegra186_bpmp_resume(struct tegra_bpmp *bpmp)
+{
+	unsigned int i;
+
+	/* reset message channels */
+	tegra186_bpmp_channel_reset(bpmp->tx_channel);
+	tegra186_bpmp_channel_reset(bpmp->rx_channel);
+
+	for (i = 0; i < bpmp->threaded.count; i++)
+		tegra186_bpmp_channel_reset(&bpmp->threaded_channels[i]);
+
+	return 0;
+}
+
+const struct tegra_bpmp_ops tegra186_bpmp_ops = {
+	.init = tegra186_bpmp_init,
+	.deinit = tegra186_bpmp_deinit,
+	.is_response_ready = tegra186_bpmp_is_message_ready,
+	.is_request_ready = tegra186_bpmp_is_message_ready,
+	.ack_response = tegra186_bpmp_ack_message,
+	.ack_request = tegra186_bpmp_ack_message,
+	.is_response_channel_free = tegra186_bpmp_is_channel_free,
+	.is_request_channel_free = tegra186_bpmp_is_channel_free,
+	.post_response = tegra186_bpmp_post_message,
+	.post_request = tegra186_bpmp_post_message,
+	.ring_doorbell = tegra186_bpmp_ring_doorbell,
+	.resume = tegra186_bpmp_resume,
+};

drivers/firmware/tegra/bpmp-tegra210.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include <soc/tegra/bpmp.h>
+
+#include "bpmp-private.h"
+
+#define TRIGGER_OFFSET		0x000
+#define RESULT_OFFSET(id)	(0xc00 + id * 4)
+#define TRIGGER_ID_SHIFT	16
+#define TRIGGER_CMD_GET		4
+
+#define STA_OFFSET		0
+#define SET_OFFSET		4
+#define CLR_OFFSET		8
+
+#define CH_MASK(ch)	(0x3 << ((ch) * 2))
+#define SL_SIGL(ch)	(0x0 << ((ch) * 2))
+#define SL_QUED(ch)	(0x1 << ((ch) * 2))
+#define MA_FREE(ch)	(0x2 << ((ch) * 2))
+#define MA_ACKD(ch)	(0x3 << ((ch) * 2))
+
+struct tegra210_bpmp {
+	void __iomem *atomics;
+	void __iomem *arb_sema;
+	struct irq_data *tx_irq_data;
+};
+
+static u32 bpmp_channel_status(struct tegra_bpmp *bpmp, unsigned int index)
+{
+	struct tegra210_bpmp *priv = bpmp->priv;
+
+	return __raw_readl(priv->arb_sema + STA_OFFSET) & CH_MASK(index);
+}
+
+static bool tegra210_bpmp_is_response_ready(struct tegra_bpmp_channel *channel)
+{
+	unsigned int index = channel->index;
+
+	return bpmp_channel_status(channel->bpmp, index) == MA_ACKD(index);
+}
+
+static bool tegra210_bpmp_is_request_ready(struct tegra_bpmp_channel *channel)
+{
+	unsigned int index = channel->index;
+
+	return bpmp_channel_status(channel->bpmp, index) == SL_SIGL(index);
+}
+
+static bool
+tegra210_bpmp_is_request_channel_free(struct tegra_bpmp_channel *channel)
+{
+	unsigned int index = channel->index;
+
+	return bpmp_channel_status(channel->bpmp, index) == MA_FREE(index);
+}
+
+static bool
+tegra210_bpmp_is_response_channel_free(struct tegra_bpmp_channel *channel)
+{
+	unsigned int index = channel->index;
+
+	return bpmp_channel_status(channel->bpmp, index) == SL_QUED(index);
+}
+
+static int tegra210_bpmp_post_request(struct tegra_bpmp_channel *channel)
+{
+	struct tegra210_bpmp *priv = channel->bpmp->priv;
+
+	__raw_writel(CH_MASK(channel->index), priv->arb_sema + CLR_OFFSET);
+
+	return 0;
+}
+
+static int tegra210_bpmp_post_response(struct tegra_bpmp_channel *channel)
+{
+	struct tegra210_bpmp *priv = channel->bpmp->priv;
+
+	__raw_writel(MA_ACKD(channel->index), priv->arb_sema + SET_OFFSET);
+
+	return 0;
+}
+
+static int tegra210_bpmp_ack_response(struct tegra_bpmp_channel *channel)
+{
+	struct tegra210_bpmp *priv = channel->bpmp->priv;
+
+	__raw_writel(MA_ACKD(channel->index) ^ MA_FREE(channel->index),
+		     priv->arb_sema + CLR_OFFSET);
+
+	return 0;
+}
+
+static int tegra210_bpmp_ack_request(struct tegra_bpmp_channel *channel)
+{
+	struct tegra210_bpmp *priv = channel->bpmp->priv;
+
+	__raw_writel(SL_QUED(channel->index), priv->arb_sema + SET_OFFSET);
+
+	return 0;
+}
+
+static int tegra210_bpmp_ring_doorbell(struct tegra_bpmp *bpmp)
+{
+	struct tegra210_bpmp *priv = bpmp->priv;
+	struct irq_data *irq_data = priv->tx_irq_data;
+
+	/*
+	 * Tegra Legacy Interrupt Controller (LIC) is used to notify BPMP of
+	 * available messages
+	 */
+	if (irq_data->chip->irq_retrigger)
+		return irq_data->chip->irq_retrigger(irq_data);
+
+	return -EINVAL;
+}
+
+static irqreturn_t rx_irq(int irq, void *data)
+{
+	struct tegra_bpmp *bpmp = data;
+
+	tegra_bpmp_handle_rx(bpmp);
+
+	return IRQ_HANDLED;
+}
+
+static int tegra210_bpmp_channel_init(struct tegra_bpmp_channel *channel,
+				      struct tegra_bpmp *bpmp,
+				      unsigned int index)
+{
+	struct tegra210_bpmp *priv = bpmp->priv;
+	u32 address;
+	void *p;
+
+	/* Retrieve channel base address from BPMP */
+	writel(index << TRIGGER_ID_SHIFT | TRIGGER_CMD_GET,
+	       priv->atomics + TRIGGER_OFFSET);
+	address = readl(priv->atomics + RESULT_OFFSET(index));
+
+	p = devm_ioremap(bpmp->dev, address, 0x80);
+	if (!p)
+		return -ENOMEM;
+
+	channel->ib = p;
+	channel->ob = p;
+	channel->index = index;
+	init_completion(&channel->completion);
+	channel->bpmp = bpmp;
+
+	return 0;
+}
+
+static int tegra210_bpmp_init(struct tegra_bpmp *bpmp)
+{
+	struct platform_device *pdev = to_platform_device(bpmp->dev);
+	struct tegra210_bpmp *priv;
+	struct resource *res;
+	unsigned int i;
+	int err;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	bpmp->priv = priv;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->atomics = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->atomics))
+		return PTR_ERR(priv->atomics);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	priv->arb_sema = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(priv->arb_sema))
+		return PTR_ERR(priv->arb_sema);
+
+	err = tegra210_bpmp_channel_init(bpmp->tx_channel, bpmp,
+					 bpmp->soc->channels.cpu_tx.offset);
+	if (err < 0)
+		return err;
+
+	err = tegra210_bpmp_channel_init(bpmp->rx_channel, bpmp,
+					 bpmp->soc->channels.cpu_rx.offset);
+	if (err < 0)
+		return err;
+
+	for (i = 0; i < bpmp->threaded.count; i++) {
+		unsigned int index = bpmp->soc->channels.thread.offset + i;
+
+		err = tegra210_bpmp_channel_init(&bpmp->threaded_channels[i],
+						 bpmp, index);
+		if (err < 0)
+			return err;
+	}
+
+	err = platform_get_irq_byname(pdev, "tx");
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to get TX IRQ: %d\n", err);
+		return err;
+	}
+
+	priv->tx_irq_data = irq_get_irq_data(err);
+	if (!priv->tx_irq_data) {
+		dev_err(&pdev->dev, "failed to get IRQ data for TX IRQ\n");
+		return err;
+	}
+
+	err = platform_get_irq_byname(pdev, "rx");
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to get rx IRQ: %d\n", err);
+		return err;
+	}
+
+	err = devm_request_irq(&pdev->dev, err, rx_irq,
+			       IRQF_NO_SUSPEND, dev_name(&pdev->dev), bpmp);
+	if (err < 0) {
+		dev_err(&pdev->dev, "failed to request IRQ: %d\n", err);
+		return err;
+	}
+
+	return 0;
+}
+
+const struct tegra_bpmp_ops tegra210_bpmp_ops = {
+	.init = tegra210_bpmp_init,
+	.is_response_ready = tegra210_bpmp_is_response_ready,
+	.is_request_ready = tegra210_bpmp_is_request_ready,
+	.ack_response = tegra210_bpmp_ack_response,
+	.ack_request = tegra210_bpmp_ack_request,
+	.is_response_channel_free = tegra210_bpmp_is_response_channel_free,
+	.is_request_channel_free = tegra210_bpmp_is_request_channel_free,
+	.post_response = tegra210_bpmp_post_response,
+	.post_request = tegra210_bpmp_post_request,
+	.ring_doorbell = tegra210_bpmp_ring_doorbell,
+};

include/soc/tegra/bpmp.h

@@ -23,6 +23,7 @@
 #include <soc/tegra/bpmp-abi.h>
 
 struct tegra_bpmp_clk;
+struct tegra_bpmp_ops;
 
 struct tegra_bpmp_soc {
 	struct {
@@ -32,6 +33,8 @@ struct tegra_bpmp_soc {
 			unsigned int timeout;
 		} cpu_tx, thread, cpu_rx;
 	} channels;
+
+	const struct tegra_bpmp_ops *ops;
 	unsigned int num_resets;
 };
 
@@ -47,6 +50,7 @@ struct tegra_bpmp_channel {
 	struct tegra_bpmp_mb_data *ob;
 	struct completion completion;
 	struct tegra_ivc *ivc;
+	unsigned int index;
 };
 
 typedef void (*tegra_bpmp_mrq_handler_t)(unsigned int mrq,
@@ -63,12 +67,7 @@ struct tegra_bpmp_mrq {
 struct tegra_bpmp {
 	const struct tegra_bpmp_soc *soc;
 	struct device *dev;
-
-	struct {
-		struct gen_pool *pool;
-		dma_addr_t phys;
-		void *virt;
-	} tx, rx;
+	void *priv;
 
 	struct {
 		struct mbox_client client;
@@ -173,6 +172,8 @@ static inline bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp,
 }
 #endif
 
+void tegra_bpmp_handle_rx(struct tegra_bpmp *bpmp);
+
 #if IS_ENABLED(CONFIG_CLK_TEGRA_BPMP)
 int tegra_bpmp_init_clocks(struct tegra_bpmp *bpmp);
 #else