[PATCH v7 3/5] remoteproc: k3: Move out functions common with M4 driver

[Hari Nagalla <hnagalla@ti.com>]

From: Martyn Welch <martyn.welch@collabora.com>

In the next commit we will be adding the M4F driver which shares a lot of
commonality with the DSP driver. Move this shared functionality out so
that it can be used by both drivers.

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Signed-off-by: Hari Nagalla <hnagalla@ti.com>
---
Changes since v2:
 - New patch (reordered refactored from v2)

Changes since v3:
 - Removed "ipc_only" element from k3_rproc structure
 - Refactored to bring 3 more common functions

Changes since v4:
 - None

Changes since v5:
 - Rearranged the functions order to match with the functions in
   ti_k3_dsp_remoteproc.c to ease review.

Changes since v6:
 - Generated patch with -M/-B/-C options

link to v6:
https://lore.kernel.org/all/20230913111644.29889-4-hnagalla@ti.com/

 drivers/remoteproc/Makefile               |    2 +-
 drivers/remoteproc/ti_k3_common.c         |  583 ++++++++++
 drivers/remoteproc/ti_k3_dsp_remoteproc.c | 1277 ++++++---------------
 3 files changed, 952 insertions(+), 910 deletions(-)
 create mode 100644 drivers/remoteproc/ti_k3_common.c
 rewrite drivers/remoteproc/ti_k3_dsp_remoteproc.c (67%)

diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
index 91314a9b43ce..55c552e27a45 100644
--- a/drivers/remoteproc/Makefile
+++ b/drivers/remoteproc/Makefile
@@ -36,6 +36,6 @@ obj-$(CONFIG_RCAR_REMOTEPROC)		+= rcar_rproc.o
 obj-$(CONFIG_ST_REMOTEPROC)		+= st_remoteproc.o
 obj-$(CONFIG_ST_SLIM_REMOTEPROC)	+= st_slim_rproc.o
 obj-$(CONFIG_STM32_RPROC)		+= stm32_rproc.o
-obj-$(CONFIG_TI_K3_DSP_REMOTEPROC)	+= ti_k3_dsp_remoteproc.o
+obj-$(CONFIG_TI_K3_DSP_REMOTEPROC)	+= ti_k3_dsp_remoteproc.o ti_k3_common.o
 obj-$(CONFIG_TI_K3_R5_REMOTEPROC)	+= ti_k3_r5_remoteproc.o
 obj-$(CONFIG_XLNX_R5_REMOTEPROC)	+= xlnx_r5_remoteproc.o
diff --git a/drivers/remoteproc/ti_k3_common.c b/drivers/remoteproc/ti_k3_common.c
new file mode 100644
index 000000000000..62c7c5dba78a
--- /dev/null
+++ b/drivers/remoteproc/ti_k3_common.c
@@ -0,0 +1,583 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI K3 Remote Processor(s) driver common code
+ *
+ * Refactored from ti_k3_dsp_remoteproc.c.
+ *
+ * ti_k3_dsp_remoteproc.c:
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *	Suman Anna <s-anna@ti.com>
+ */
+
+#include <linux/io.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/omap-mailbox.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "omap_remoteproc.h"
+#include "remoteproc_internal.h"
+#include "ti_sci_proc.h"
+#include "ti_k3_common.h"
+
+/**
+ * k3_rproc_mbox_callback() - inbound mailbox message handler
+ * @client: mailbox client pointer used for requesting the mailbox channel
+ * @data: mailbox payload
+ *
+ * This handler is invoked by the K3 mailbox driver whenever a mailbox
+ * message is received. Usually, the mailbox payload simply contains
+ * the index of the virtqueue that is kicked by the remote processor,
+ * and we let remoteproc core handle it.
+ *
+ * In addition to virtqueue indices, we also have some out-of-band values
+ * that indicate different events. Those values are deliberately very
+ * large so they don't coincide with virtqueue indices.
+ */
+static void k3_rproc_mbox_callback(struct mbox_client *client, void *data)
+{
+	struct k3_rproc *kproc = container_of(client, struct k3_rproc,
+						  client);
+	struct device *dev = kproc->rproc->dev.parent;
+	const char *name = kproc->rproc->name;
+	u32 msg = omap_mbox_message(data);
+
+	dev_dbg(dev, "mbox msg: 0x%x\n", msg);
+
+	switch (msg) {
+	case RP_MBOX_CRASH:
+		/*
+		 * remoteproc detected an exception, but error recovery is not
+		 * supported. So, just log this for now
+		 */
+		dev_err(dev, "K3 rproc %s crashed\n", name);
+		break;
+	case RP_MBOX_ECHO_REPLY:
+		dev_info(dev, "received echo reply from %s\n", name);
+		break;
+	default:
+		/* silently handle all other valid messages */
+		if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
+			return;
+		if (msg > kproc->rproc->max_notifyid) {
+			dev_dbg(dev, "dropping unknown message 0x%x", msg);
+			return;
+		}
+		/* msg contains the index of the triggered vring */
+		if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE)
+			dev_dbg(dev, "no message was found in vqid %d\n", msg);
+	}
+}
+
+/*
+ * Kick the remote processor to notify about pending unprocessed messages.
+ * The vqid usage is not used and is inconsequential, as the kick is performed
+ * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
+ * the remote processor is expected to process both its Tx and Rx virtqueues.
+ */
+void k3_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	mbox_msg_t msg = (mbox_msg_t)vqid;
+	int ret;
+
+	/* send the index of the triggered virtqueue in the mailbox payload */
+	ret = mbox_send_message(kproc->mbox, (void *)msg);
+	if (ret < 0)
+		dev_err(dev, "failed to send mailbox message, status = %d\n",
+			ret);
+}
+EXPORT_SYMBOL_GPL(k3_rproc_kick);
+
+/* Put the remote processor into reset */
+int k3_rproc_reset(struct k3_rproc *kproc)
+{
+	struct device *dev = kproc->dev;
+	int ret;
+
+	ret = reset_control_assert(kproc->reset);
+	if (ret) {
+		dev_err(dev, "local-reset assert failed, ret = %d\n", ret);
+		return ret;
+	}
+
+	if (kproc->data->uses_lreset)
+		return ret;
+
+	ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+						    kproc->ti_sci_id);
+	if (ret) {
+		dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
+		if (reset_control_deassert(kproc->reset))
+			dev_warn(dev, "local-reset deassert back failed\n");
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_reset);
+
+/* Release the remote processor from reset */
+int k3_rproc_release(struct k3_rproc *kproc)
+{
+	struct device *dev = kproc->dev;
+	int ret;
+
+	if (kproc->data->uses_lreset)
+		goto lreset;
+
+	ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
+						    kproc->ti_sci_id);
+	if (ret) {
+		dev_err(dev, "module-reset deassert failed, ret = %d\n", ret);
+		return ret;
+	}
+
+lreset:
+	ret = reset_control_deassert(kproc->reset);
+	if (ret) {
+		dev_err(dev, "local-reset deassert failed, ret = %d\n", ret);
+		if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+							  kproc->ti_sci_id))
+			dev_warn(dev, "module-reset assert back failed\n");
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_release);
+
+int k3_rproc_request_mbox(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct mbox_client *client = &kproc->client;
+	struct device *dev = kproc->dev;
+	int ret;
+
+	client->dev = dev;
+	client->tx_done = NULL;
+	client->rx_callback = k3_rproc_mbox_callback;
+	client->tx_block = false;
+	client->knows_txdone = false;
+
+	kproc->mbox = mbox_request_channel(client, 0);
+	if (IS_ERR(kproc->mbox)) {
+		ret = -EBUSY;
+		dev_err(dev, "mbox_request_channel failed: %ld\n",
+			PTR_ERR(kproc->mbox));
+		return ret;
+	}
+
+	/*
+	 * Ping the remote processor, this is only for sanity-sake for now;
+	 * there is no functional effect whatsoever.
+	 *
+	 * Note that the reply will _not_ arrive immediately: this message
+	 * will wait in the mailbox fifo until the remote processor is booted.
+	 */
+	ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
+	if (ret < 0) {
+		dev_err(dev, "mbox_send_message failed: %d\n", ret);
+		mbox_free_channel(kproc->mbox);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_request_mbox);
+
+/*
+ * The DSP and MCU cores have a local reset that affects only the CPU, and a
+ * generic module reset that powers on the device and allows the internal
+ * memories to be accessed while the local reset is asserted. This function is
+ * used to release the global reset on remote cores to allow loading into the
+ * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
+ * firmware loading, and is followed by the .start() ops after loading to
+ * actually let the remote cores to run. This callback is invoked only in
+ * remoteproc mode.
+ */
+int k3_rproc_prepare(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+	int ret;
+
+	ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
+						    kproc->ti_sci_id);
+	if (ret)
+		dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading, ret = %d\n",
+			ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_prepare);
+
+/*
+ * This function implements the .unprepare() ops and performs the complimentary
+ * operations to that of the .prepare() ops. The function is used to assert the
+ * global reset on applicable DSP, MCU cores. This completes the second portion of
+ * powering down the remote core. The cores themselves are only halted in the
+ * .stop() callback through the local reset, and the .unprepare() ops is invoked
+ * by the remoteproc core after the remoteproc is stopped to balance the global
+ * reset. This callback is invoked only in remoteproc mode.
+ */
+int k3_rproc_unprepare(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+	int ret;
+
+	ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
+						    kproc->ti_sci_id);
+	if (ret)
+		dev_err(dev, "module-reset assert failed, ret = %d\n", ret);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_unprepare);
+
+/*
+ * This function implements the .get_loaded_rsc_table() callback and is used
+ * to provide the resource table for a booted remote processor in IPC-only
+ * mode. The remote processor firmwares follow a design-by-contract approach
+ * and are expected to have the resource table at the base of the DDR region
+ * reserved for firmware usage. This provides flexibility for the remote
+ * processor to be booted by different bootloaders that may or may not have the
+ * ability to publish the resource table address and size through a DT
+ * property.
+ */
+struct resource_table *k3_get_loaded_rsc_table(struct rproc *rproc,
+					       size_t *rsc_table_sz)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+
+	if (!kproc->rmem[0].cpu_addr) {
+		dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	/*
+	 * NOTE: The resource table size is currently hard-coded to a maximum
+	 * of 256 bytes. The most common resource table usage for K3 firmwares
+	 * is to only have the vdev resource entry and an optional trace entry.
+	 * The exact size could be computed based on resource table address, but
+	 * the hard-coded value suffices to support the IPC-only mode.
+	 */
+	*rsc_table_sz = 256;
+	return (struct resource_table *)kproc->rmem[0].cpu_addr;
+}
+EXPORT_SYMBOL_GPL(k3_get_loaded_rsc_table);
+
+/*
+ * Custom function to translate a remote processor device address (internal
+ * RAMs only) to a kernel virtual address.  The remote processors can access
+ * their RAMs at either an internal address visible only from a remote
+ * processor, or at the SoC-level bus address. Both these addresses need to be
+ * looked through for translation. The translated addresses can be used either
+ * by the remoteproc core for loading (when using kernel remoteproc loader), or
+ * by any rpmsg bus drivers.
+ */
+void *k3_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	void __iomem *va = NULL;
+	phys_addr_t bus_addr;
+	u32 dev_addr, offset;
+	size_t size;
+	int i;
+
+	if (len == 0)
+		return NULL;
+
+	for (i = 0; i < kproc->num_mems; i++) {
+		bus_addr = kproc->mem[i].bus_addr;
+		dev_addr = kproc->mem[i].dev_addr;
+		size = kproc->mem[i].size;
+
+		if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
+			/* handle remote-view addresses */
+			if (da >= dev_addr &&
+			    ((da + len) <= (dev_addr + size))) {
+				offset = da - dev_addr;
+				va = kproc->mem[i].cpu_addr + offset;
+				return (__force void *)va;
+			}
+		} else {
+			/* handle SoC-view addresses */
+			if (da >= bus_addr &&
+			    (da + len) <= (bus_addr + size)) {
+				offset = da - bus_addr;
+				va = kproc->mem[i].cpu_addr + offset;
+				return (__force void *)va;
+			}
+		}
+	}
+
+	/* handle any SRAM regions using SoC-view addresses */
+	for (i = 0; i < kproc->num_sram; i++) {
+		dev_addr = kproc->sram[i].dev_addr;
+		size = kproc->sram[i].size;
+
+		if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
+			offset = da - dev_addr;
+			va = kproc->sram[i].cpu_addr + offset;
+			return (__force void *)va;
+		}
+	}
+
+	/* handle static DDR reserved memory regions */
+	for (i = 0; i < kproc->num_rmems; i++) {
+		dev_addr = kproc->rmem[i].dev_addr;
+		size = kproc->rmem[i].size;
+
+		if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
+			offset = da - dev_addr;
+			va = kproc->rmem[i].cpu_addr + offset;
+			return (__force void *)va;
+		}
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_da_to_va);
+
+int k3_rproc_of_get_memories(struct platform_device *pdev,
+			     struct k3_rproc *kproc)
+{
+	const struct k3_rproc_dev_data *data = kproc->data;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	int num_mems = 0;
+	int i;
+
+	num_mems = kproc->data->num_mems;
+	kproc->mem = devm_kcalloc(kproc->dev, num_mems,
+				  sizeof(*kproc->mem), GFP_KERNEL);
+	if (!kproc->mem)
+		return -ENOMEM;
+
+	for (i = 0; i < num_mems; i++) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   data->mems[i].name);
+		if (!res) {
+			dev_err(dev, "found no memory resource for %s\n",
+				data->mems[i].name);
+			return -EINVAL;
+		}
+		if (!devm_request_mem_region(dev, res->start,
+					     resource_size(res),
+					     dev_name(dev))) {
+			dev_err(dev, "could not request %s region for resource\n",
+				data->mems[i].name);
+			return -EBUSY;
+		}
+
+		kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
+							 resource_size(res));
+		if (!kproc->mem[i].cpu_addr) {
+			dev_err(dev, "failed to map %s memory\n",
+				data->mems[i].name);
+			return -ENOMEM;
+		}
+		kproc->mem[i].bus_addr = res->start;
+		kproc->mem[i].dev_addr = data->mems[i].dev_addr;
+		kproc->mem[i].size = resource_size(res);
+
+		dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+			data->mems[i].name, &kproc->mem[i].bus_addr,
+			kproc->mem[i].size, kproc->mem[i].cpu_addr,
+			kproc->mem[i].dev_addr);
+	}
+	kproc->num_mems = num_mems;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_memories);
+
+int k3_rproc_of_get_sram_memories(struct platform_device *pdev,
+					   struct k3_rproc *kproc)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct device_node *sram_np;
+	struct resource res;
+	int num_sram;
+	int i, ret;
+
+	num_sram = of_property_count_elems_of_size(np, "sram", sizeof(phandle));
+	if (num_sram <= 0) {
+		dev_dbg(dev, "device does not use reserved on-chip memories, num_sram = %d\n",
+			num_sram);
+		return 0;
+	}
+
+	kproc->sram = devm_kcalloc(dev, num_sram, sizeof(*kproc->sram), GFP_KERNEL);
+	if (!kproc->sram)
+		return -ENOMEM;
+
+	for (i = 0; i < num_sram; i++) {
+		sram_np = of_parse_phandle(np, "sram", i);
+		if (!sram_np)
+			return -EINVAL;
+
+		if (!of_device_is_available(sram_np)) {
+			of_node_put(sram_np);
+			return -EINVAL;
+		}
+
+		ret = of_address_to_resource(sram_np, 0, &res);
+		of_node_put(sram_np);
+		if (ret)
+			return -EINVAL;
+
+		kproc->sram[i].bus_addr = res.start;
+		kproc->sram[i].dev_addr = res.start;
+		kproc->sram[i].size = resource_size(&res);
+		kproc->sram[i].cpu_addr = devm_ioremap_wc(dev, res.start,
+							 resource_size(&res));
+		if (!kproc->sram[i].cpu_addr) {
+			dev_err(dev, "failed to parse and map sram%d memory at %pad\n",
+				i, &res.start);
+			return -ENOMEM;
+		}
+
+		dev_dbg(dev, "memory sram%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+			i, &kproc->sram[i].bus_addr,
+			kproc->sram[i].size, kproc->sram[i].cpu_addr,
+			kproc->sram[i].dev_addr);
+	}
+	kproc->num_sram = num_sram;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_sram_memories);
+int k3_reserved_mem_init(struct k3_rproc *kproc)
+{
+	struct device *dev = kproc->dev;
+	struct device_node *np = dev->of_node;
+	struct device_node *rmem_np;
+	struct reserved_mem *rmem;
+	int num_rmems;
+	int ret, i;
+
+	num_rmems = of_property_count_elems_of_size(np, "memory-region",
+						    sizeof(phandle));
+	if (num_rmems <= 0) {
+		dev_err(dev, "device does not reserved memory regions, ret = %d\n",
+			num_rmems);
+		return -EINVAL;
+	}
+	if (num_rmems < 2) {
+		dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
+			num_rmems);
+		return -EINVAL;
+	}
+
+	/* use reserved memory region 0 for vring DMA allocations */
+	ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
+	if (ret) {
+		dev_err(dev, "device cannot initialize DMA pool, ret = %d\n",
+			ret);
+		return ret;
+	}
+
+	num_rmems--;
+	kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
+	if (!kproc->rmem) {
+		ret = -ENOMEM;
+		goto release_rmem;
+	}
+
+	/* use remaining reserved memory regions for static carveouts */
+	for (i = 0; i < num_rmems; i++) {
+		rmem_np = of_parse_phandle(np, "memory-region", i + 1);
+		if (!rmem_np) {
+			ret = -EINVAL;
+			goto unmap_rmem;
+		}
+
+		rmem = of_reserved_mem_lookup(rmem_np);
+		if (!rmem) {
+			of_node_put(rmem_np);
+			ret = -EINVAL;
+			goto unmap_rmem;
+		}
+		of_node_put(rmem_np);
+
+		kproc->rmem[i].bus_addr = rmem->base;
+		/* 64-bit address regions currently not supported */
+		kproc->rmem[i].dev_addr = (u32)rmem->base;
+		kproc->rmem[i].size = rmem->size;
+		kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
+		if (!kproc->rmem[i].cpu_addr) {
+			dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
+				i + 1, &rmem->base, &rmem->size);
+			ret = -ENOMEM;
+			goto unmap_rmem;
+		}
+
+		dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
+			i + 1, &kproc->rmem[i].bus_addr,
+			kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
+			kproc->rmem[i].dev_addr);
+	}
+	kproc->num_rmems = num_rmems;
+
+	return 0;
+
+unmap_rmem:
+	for (i--; i >= 0; i--)
+		iounmap(kproc->rmem[i].cpu_addr);
+	kfree(kproc->rmem);
+release_rmem:
+	of_reserved_mem_device_release(kproc->dev);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(k3_reserved_mem_init);
+
+void k3_reserved_mem_exit(struct k3_rproc *kproc)
+{
+	int i;
+
+	for (i = 0; i < kproc->num_rmems; i++)
+		iounmap(kproc->rmem[i].cpu_addr);
+	kfree(kproc->rmem);
+
+	of_reserved_mem_device_release(kproc->dev);
+}
+EXPORT_SYMBOL_GPL(k3_reserved_mem_exit);
+
+struct ti_sci_proc *k3_rproc_of_get_tsp(struct device *dev,
+					const struct ti_sci_handle *sci)
+{
+	struct ti_sci_proc *tsp;
+	u32 temp[2];
+	int ret;
+
+	ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
+					 temp, 2);
+	if (ret < 0)
+		return ERR_PTR(ret);
+
+	tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
+	if (!tsp)
+		return ERR_PTR(-ENOMEM);
+
+	tsp->dev = dev;
+	tsp->sci = sci;
+	tsp->ops = &sci->ops.proc_ops;
+	tsp->proc_id = temp[0];
+	tsp->host_id = temp[1];
+
+	return tsp;
+}
+EXPORT_SYMBOL_GPL(k3_rproc_of_get_tsp);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI K3 common Remoteproc support");
diff --git a/drivers/remoteproc/ti_k3_dsp_remoteproc.c b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
dissimilarity index 67%
index ab882e3b7130..ebe23fc5ca44 100644
--- a/drivers/remoteproc/ti_k3_dsp_remoteproc.c
+++ b/drivers/remoteproc/ti_k3_dsp_remoteproc.c
@@ -1,909 +1,368 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * TI K3 DSP Remote Processor(s) driver
- *
- * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
- *	Suman Anna <s-anna@ti.com>
- */
-
-#include <linux/io.h>
-#include <linux/mailbox_client.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_reserved_mem.h>
-#include <linux/omap-mailbox.h>
-#include <linux/platform_device.h>
-#include <linux/remoteproc.h>
-#include <linux/reset.h>
-#include <linux/slab.h>
-
-#include "omap_remoteproc.h"
-#include "remoteproc_internal.h"
-#include "ti_sci_proc.h"
-
-#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK	(SZ_16M - 1)
-
-/**
- * struct k3_dsp_mem - internal memory structure
- * @cpu_addr: MPU virtual address of the memory region
- * @bus_addr: Bus address used to access the memory region
- * @dev_addr: Device address of the memory region from DSP view
- * @size: Size of the memory region
- */
-struct k3_dsp_mem {
-	void __iomem *cpu_addr;
-	phys_addr_t bus_addr;
-	u32 dev_addr;
-	size_t size;
-};
-
-/**
- * struct k3_dsp_mem_data - memory definitions for a DSP
- * @name: name for this memory entry
- * @dev_addr: device address for the memory entry
- */
-struct k3_dsp_mem_data {
-	const char *name;
-	const u32 dev_addr;
-};
-
-/**
- * struct k3_dsp_dev_data - device data structure for a DSP
- * @mems: pointer to memory definitions for a DSP
- * @num_mems: number of memory regions in @mems
- * @boot_align_addr: boot vector address alignment granularity
- * @uses_lreset: flag to denote the need for local reset management
- */
-struct k3_dsp_dev_data {
-	const struct k3_dsp_mem_data *mems;
-	u32 num_mems;
-	u32 boot_align_addr;
-	bool uses_lreset;
-};
-
-/**
- * struct k3_dsp_rproc - k3 DSP remote processor driver structure
- * @dev: cached device pointer
- * @rproc: remoteproc device handle
- * @mem: internal memory regions data
- * @num_mems: number of internal memory regions
- * @rmem: reserved memory regions data
- * @num_rmems: number of reserved memory regions
- * @reset: reset control handle
- * @data: pointer to DSP-specific device data
- * @tsp: TI-SCI processor control handle
- * @ti_sci: TI-SCI handle
- * @ti_sci_id: TI-SCI device identifier
- * @mbox: mailbox channel handle
- * @client: mailbox client to request the mailbox channel
- */
-struct k3_dsp_rproc {
-	struct device *dev;
-	struct rproc *rproc;
-	struct k3_dsp_mem *mem;
-	int num_mems;
-	struct k3_dsp_mem *rmem;
-	int num_rmems;
-	struct reset_control *reset;
-	const struct k3_dsp_dev_data *data;
-	struct ti_sci_proc *tsp;
-	const struct ti_sci_handle *ti_sci;
-	u32 ti_sci_id;
-	struct mbox_chan *mbox;
-	struct mbox_client client;
-};
-
-/**
- * k3_dsp_rproc_mbox_callback() - inbound mailbox message handler
- * @client: mailbox client pointer used for requesting the mailbox channel
- * @data: mailbox payload
- *
- * This handler is invoked by the OMAP mailbox driver whenever a mailbox
- * message is received. Usually, the mailbox payload simply contains
- * the index of the virtqueue that is kicked by the remote processor,
- * and we let remoteproc core handle it.
- *
- * In addition to virtqueue indices, we also have some out-of-band values
- * that indicate different events. Those values are deliberately very
- * large so they don't coincide with virtqueue indices.
- */
-static void k3_dsp_rproc_mbox_callback(struct mbox_client *client, void *data)
-{
-	struct k3_dsp_rproc *kproc = container_of(client, struct k3_dsp_rproc,
-						  client);
-	struct device *dev = kproc->rproc->dev.parent;
-	const char *name = kproc->rproc->name;
-	u32 msg = omap_mbox_message(data);
-
-	dev_dbg(dev, "mbox msg: 0x%x\n", msg);
-
-	switch (msg) {
-	case RP_MBOX_CRASH:
-		/*
-		 * remoteproc detected an exception, but error recovery is not
-		 * supported. So, just log this for now
-		 */
-		dev_err(dev, "K3 DSP rproc %s crashed\n", name);
-		break;
-	case RP_MBOX_ECHO_REPLY:
-		dev_info(dev, "received echo reply from %s\n", name);
-		break;
-	default:
-		/* silently handle all other valid messages */
-		if (msg >= RP_MBOX_READY && msg < RP_MBOX_END_MSG)
-			return;
-		if (msg > kproc->rproc->max_notifyid) {
-			dev_dbg(dev, "dropping unknown message 0x%x", msg);
-			return;
-		}
-		/* msg contains the index of the triggered vring */
-		if (rproc_vq_interrupt(kproc->rproc, msg) == IRQ_NONE)
-			dev_dbg(dev, "no message was found in vqid %d\n", msg);
-	}
-}
-
-/*
- * Kick the remote processor to notify about pending unprocessed messages.
- * The vqid usage is not used and is inconsequential, as the kick is performed
- * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
- * the remote processor is expected to process both its Tx and Rx virtqueues.
- */
-static void k3_dsp_rproc_kick(struct rproc *rproc, int vqid)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = rproc->dev.parent;
-	mbox_msg_t msg = (mbox_msg_t)vqid;
-	int ret;
-
-	/* send the index of the triggered virtqueue in the mailbox payload */
-	ret = mbox_send_message(kproc->mbox, (void *)msg);
-	if (ret < 0)
-		dev_err(dev, "failed to send mailbox message (%pe)\n",
-			ERR_PTR(ret));
-}
-
-/* Put the DSP processor into reset */
-static int k3_dsp_rproc_reset(struct k3_dsp_rproc *kproc)
-{
-	struct device *dev = kproc->dev;
-	int ret;
-
-	ret = reset_control_assert(kproc->reset);
-	if (ret) {
-		dev_err(dev, "local-reset assert failed (%pe)\n", ERR_PTR(ret));
-		return ret;
-	}
-
-	if (kproc->data->uses_lreset)
-		return ret;
-
-	ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
-						    kproc->ti_sci_id);
-	if (ret) {
-		dev_err(dev, "module-reset assert failed (%pe)\n", ERR_PTR(ret));
-		if (reset_control_deassert(kproc->reset))
-			dev_warn(dev, "local-reset deassert back failed\n");
-	}
-
-	return ret;
-}
-
-/* Release the DSP processor from reset */
-static int k3_dsp_rproc_release(struct k3_dsp_rproc *kproc)
-{
-	struct device *dev = kproc->dev;
-	int ret;
-
-	if (kproc->data->uses_lreset)
-		goto lreset;
-
-	ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
-						    kproc->ti_sci_id);
-	if (ret) {
-		dev_err(dev, "module-reset deassert failed (%pe)\n", ERR_PTR(ret));
-		return ret;
-	}
-
-lreset:
-	ret = reset_control_deassert(kproc->reset);
-	if (ret) {
-		dev_err(dev, "local-reset deassert failed, (%pe)\n", ERR_PTR(ret));
-		if (kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
-							  kproc->ti_sci_id))
-			dev_warn(dev, "module-reset assert back failed\n");
-	}
-
-	return ret;
-}
-
-static int k3_dsp_rproc_request_mbox(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct mbox_client *client = &kproc->client;
-	struct device *dev = kproc->dev;
-	int ret;
-
-	client->dev = dev;
-	client->tx_done = NULL;
-	client->rx_callback = k3_dsp_rproc_mbox_callback;
-	client->tx_block = false;
-	client->knows_txdone = false;
-
-	kproc->mbox = mbox_request_channel(client, 0);
-	if (IS_ERR(kproc->mbox)) {
-		ret = -EBUSY;
-		dev_err(dev, "mbox_request_channel failed: %ld\n",
-			PTR_ERR(kproc->mbox));
-		return ret;
-	}
-
-	/*
-	 * Ping the remote processor, this is only for sanity-sake for now;
-	 * there is no functional effect whatsoever.
-	 *
-	 * Note that the reply will _not_ arrive immediately: this message
-	 * will wait in the mailbox fifo until the remote processor is booted.
-	 */
-	ret = mbox_send_message(kproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
-	if (ret < 0) {
-		dev_err(dev, "mbox_send_message failed (%pe)\n", ERR_PTR(ret));
-		mbox_free_channel(kproc->mbox);
-		return ret;
-	}
-
-	return 0;
-}
-/*
- * The C66x DSP cores have a local reset that affects only the CPU, and a
- * generic module reset that powers on the device and allows the DSP internal
- * memories to be accessed while the local reset is asserted. This function is
- * used to release the global reset on C66x DSPs to allow loading into the DSP
- * internal RAMs. The .prepare() ops is invoked by remoteproc core before any
- * firmware loading, and is followed by the .start() ops after loading to
- * actually let the C66x DSP cores run. This callback is invoked only in
- * remoteproc mode.
- */
-static int k3_dsp_rproc_prepare(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-	int ret;
-
-	ret = kproc->ti_sci->ops.dev_ops.get_device(kproc->ti_sci,
-						    kproc->ti_sci_id);
-	if (ret)
-		dev_err(dev, "module-reset deassert failed, cannot enable internal RAM loading (%pe)\n",
-			ERR_PTR(ret));
-
-	return ret;
-}
-
-/*
- * This function implements the .unprepare() ops and performs the complimentary
- * operations to that of the .prepare() ops. The function is used to assert the
- * global reset on applicable C66x cores. This completes the second portion of
- * powering down the C66x DSP cores. The cores themselves are only halted in the
- * .stop() callback through the local reset, and the .unprepare() ops is invoked
- * by the remoteproc core after the remoteproc is stopped to balance the global
- * reset. This callback is invoked only in remoteproc mode.
- */
-static int k3_dsp_rproc_unprepare(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-	int ret;
-
-	ret = kproc->ti_sci->ops.dev_ops.put_device(kproc->ti_sci,
-						    kproc->ti_sci_id);
-	if (ret)
-		dev_err(dev, "module-reset assert failed (%pe)\n", ERR_PTR(ret));
-
-	return ret;
-}
-
-/*
- * Power up the DSP remote processor.
- *
- * This function will be invoked only after the firmware for this rproc
- * was loaded, parsed successfully, and all of its resource requirements
- * were met. This callback is invoked only in remoteproc mode.
- */
-static int k3_dsp_rproc_start(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-	u32 boot_addr;
-	int ret;
-
-	ret = k3_dsp_rproc_request_mbox(rproc);
-	if (ret)
-		return ret;
-
-	boot_addr = rproc->bootaddr;
-	if (boot_addr & (kproc->data->boot_align_addr - 1)) {
-		dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n",
-			boot_addr, kproc->data->boot_align_addr);
-		ret = -EINVAL;
-		goto put_mbox;
-	}
-
-	dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr);
-	ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0);
-	if (ret)
-		goto put_mbox;
-
-	ret = k3_dsp_rproc_release(kproc);
-	if (ret)
-		goto put_mbox;
-
-	return 0;
-
-put_mbox:
-	mbox_free_channel(kproc->mbox);
-	return ret;
-}
-
-/*
- * Stop the DSP remote processor.
- *
- * This function puts the DSP processor into reset, and finishes processing
- * of any pending messages. This callback is invoked only in remoteproc mode.
- */
-static int k3_dsp_rproc_stop(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-
-	mbox_free_channel(kproc->mbox);
-
-	k3_dsp_rproc_reset(kproc);
-
-	return 0;
-}
-
-/*
- * Attach to a running DSP remote processor (IPC-only mode)
- *
- * This rproc attach callback only needs to request the mailbox, the remote
- * processor is already booted, so there is no need to issue any TI-SCI
- * commands to boot the DSP core. This callback is invoked only in IPC-only
- * mode.
- */
-static int k3_dsp_rproc_attach(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-	int ret;
-
-	ret = k3_dsp_rproc_request_mbox(rproc);
-	if (ret)
-		return ret;
-
-	dev_info(dev, "DSP initialized in IPC-only mode\n");
-	return 0;
-}
-
-/*
- * Detach from a running DSP remote processor (IPC-only mode)
- *
- * This rproc detach callback performs the opposite operation to attach callback
- * and only needs to release the mailbox, the DSP core is not stopped and will
- * be left to continue to run its booted firmware. This callback is invoked only
- * in IPC-only mode.
- */
-static int k3_dsp_rproc_detach(struct rproc *rproc)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-
-	mbox_free_channel(kproc->mbox);
-	dev_info(dev, "DSP deinitialized in IPC-only mode\n");
-	return 0;
-}
-
-/*
- * This function implements the .get_loaded_rsc_table() callback and is used
- * to provide the resource table for a booted DSP in IPC-only mode. The K3 DSP
- * firmwares follow a design-by-contract approach and are expected to have the
- * resource table at the base of the DDR region reserved for firmware usage.
- * This provides flexibility for the remote processor to be booted by different
- * bootloaders that may or may not have the ability to publish the resource table
- * address and size through a DT property. This callback is invoked only in
- * IPC-only mode.
- */
-static struct resource_table *k3_dsp_get_loaded_rsc_table(struct rproc *rproc,
-							  size_t *rsc_table_sz)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	struct device *dev = kproc->dev;
-
-	if (!kproc->rmem[0].cpu_addr) {
-		dev_err(dev, "memory-region #1 does not exist, loaded rsc table can't be found");
-		return ERR_PTR(-ENOMEM);
-	}
-
-	/*
-	 * NOTE: The resource table size is currently hard-coded to a maximum
-	 * of 256 bytes. The most common resource table usage for K3 firmwares
-	 * is to only have the vdev resource entry and an optional trace entry.
-	 * The exact size could be computed based on resource table address, but
-	 * the hard-coded value suffices to support the IPC-only mode.
-	 */
-	*rsc_table_sz = 256;
-	return (struct resource_table *)kproc->rmem[0].cpu_addr;
-}
-
-/*
- * Custom function to translate a DSP device address (internal RAMs only) to a
- * kernel virtual address.  The DSPs can access their RAMs at either an internal
- * address visible only from a DSP, or at the SoC-level bus address. Both these
- * addresses need to be looked through for translation. The translated addresses
- * can be used either by the remoteproc core for loading (when using kernel
- * remoteproc loader), or by any rpmsg bus drivers.
- */
-static void *k3_dsp_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
-{
-	struct k3_dsp_rproc *kproc = rproc->priv;
-	void __iomem *va = NULL;
-	phys_addr_t bus_addr;
-	u32 dev_addr, offset;
-	size_t size;
-	int i;
-
-	if (len == 0)
-		return NULL;
-
-	for (i = 0; i < kproc->num_mems; i++) {
-		bus_addr = kproc->mem[i].bus_addr;
-		dev_addr = kproc->mem[i].dev_addr;
-		size = kproc->mem[i].size;
-
-		if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
-			/* handle DSP-view addresses */
-			if (da >= dev_addr &&
-			    ((da + len) <= (dev_addr + size))) {
-				offset = da - dev_addr;
-				va = kproc->mem[i].cpu_addr + offset;
-				return (__force void *)va;
-			}
-		} else {
-			/* handle SoC-view addresses */
-			if (da >= bus_addr &&
-			    (da + len) <= (bus_addr + size)) {
-				offset = da - bus_addr;
-				va = kproc->mem[i].cpu_addr + offset;
-				return (__force void *)va;
-			}
-		}
-	}
-
-	/* handle static DDR reserved memory regions */
-	for (i = 0; i < kproc->num_rmems; i++) {
-		dev_addr = kproc->rmem[i].dev_addr;
-		size = kproc->rmem[i].size;
-
-		if (da >= dev_addr && ((da + len) <= (dev_addr + size))) {
-			offset = da - dev_addr;
-			va = kproc->rmem[i].cpu_addr + offset;
-			return (__force void *)va;
-		}
-	}
-
-	return NULL;
-}
-
-static const struct rproc_ops k3_dsp_rproc_ops = {
-	.start		= k3_dsp_rproc_start,
-	.stop		= k3_dsp_rproc_stop,
-	.kick		= k3_dsp_rproc_kick,
-	.da_to_va	= k3_dsp_rproc_da_to_va,
-};
-
-static int k3_dsp_rproc_of_get_memories(struct platform_device *pdev,
-					struct k3_dsp_rproc *kproc)
-{
-	const struct k3_dsp_dev_data *data = kproc->data;
-	struct device *dev = &pdev->dev;
-	struct resource *res;
-	int num_mems = 0;
-	int i;
-
-	num_mems = kproc->data->num_mems;
-	kproc->mem = devm_kcalloc(kproc->dev, num_mems,
-				  sizeof(*kproc->mem), GFP_KERNEL);
-	if (!kproc->mem)
-		return -ENOMEM;
-
-	for (i = 0; i < num_mems; i++) {
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-						   data->mems[i].name);
-		if (!res) {
-			dev_err(dev, "found no memory resource for %s\n",
-				data->mems[i].name);
-			return -EINVAL;
-		}
-		if (!devm_request_mem_region(dev, res->start,
-					     resource_size(res),
-					     dev_name(dev))) {
-			dev_err(dev, "could not request %s region for resource\n",
-				data->mems[i].name);
-			return -EBUSY;
-		}
-
-		kproc->mem[i].cpu_addr = devm_ioremap_wc(dev, res->start,
-							 resource_size(res));
-		if (!kproc->mem[i].cpu_addr) {
-			dev_err(dev, "failed to map %s memory\n",
-				data->mems[i].name);
-			return -ENOMEM;
-		}
-		kproc->mem[i].bus_addr = res->start;
-		kproc->mem[i].dev_addr = data->mems[i].dev_addr;
-		kproc->mem[i].size = resource_size(res);
-
-		dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %pK da 0x%x\n",
-			data->mems[i].name, &kproc->mem[i].bus_addr,
-			kproc->mem[i].size, kproc->mem[i].cpu_addr,
-			kproc->mem[i].dev_addr);
-	}
-	kproc->num_mems = num_mems;
-
-	return 0;
-}
-
-static int k3_dsp_reserved_mem_init(struct k3_dsp_rproc *kproc)
-{
-	struct device *dev = kproc->dev;
-	struct device_node *np = dev->of_node;
-	struct device_node *rmem_np;
-	struct reserved_mem *rmem;
-	int num_rmems;
-	int ret, i;
-
-	num_rmems = of_property_count_elems_of_size(np, "memory-region",
-						    sizeof(phandle));
-	if (num_rmems < 0) {
-		dev_err(dev, "device does not reserved memory regions (%pe)\n",
-			ERR_PTR(num_rmems));
-		return -EINVAL;
-	}
-	if (num_rmems < 2) {
-		dev_err(dev, "device needs at least two memory regions to be defined, num = %d\n",
-			num_rmems);
-		return -EINVAL;
-	}
-
-	/* use reserved memory region 0 for vring DMA allocations */
-	ret = of_reserved_mem_device_init_by_idx(dev, np, 0);
-	if (ret) {
-		dev_err(dev, "device cannot initialize DMA pool (%pe)\n",
-			ERR_PTR(ret));
-		return ret;
-	}
-
-	num_rmems--;
-	kproc->rmem = kcalloc(num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
-	if (!kproc->rmem) {
-		ret = -ENOMEM;
-		goto release_rmem;
-	}
-
-	/* use remaining reserved memory regions for static carveouts */
-	for (i = 0; i < num_rmems; i++) {
-		rmem_np = of_parse_phandle(np, "memory-region", i + 1);
-		if (!rmem_np) {
-			ret = -EINVAL;
-			goto unmap_rmem;
-		}
-
-		rmem = of_reserved_mem_lookup(rmem_np);
-		if (!rmem) {
-			of_node_put(rmem_np);
-			ret = -EINVAL;
-			goto unmap_rmem;
-		}
-		of_node_put(rmem_np);
-
-		kproc->rmem[i].bus_addr = rmem->base;
-		/* 64-bit address regions currently not supported */
-		kproc->rmem[i].dev_addr = (u32)rmem->base;
-		kproc->rmem[i].size = rmem->size;
-		kproc->rmem[i].cpu_addr = ioremap_wc(rmem->base, rmem->size);
-		if (!kproc->rmem[i].cpu_addr) {
-			dev_err(dev, "failed to map reserved memory#%d at %pa of size %pa\n",
-				i + 1, &rmem->base, &rmem->size);
-			ret = -ENOMEM;
-			goto unmap_rmem;
-		}
-
-		dev_dbg(dev, "reserved memory%d: bus addr %pa size 0x%zx va %pK da 0x%x\n",
-			i + 1, &kproc->rmem[i].bus_addr,
-			kproc->rmem[i].size, kproc->rmem[i].cpu_addr,
-			kproc->rmem[i].dev_addr);
-	}
-	kproc->num_rmems = num_rmems;
-
-	return 0;
-
-unmap_rmem:
-	for (i--; i >= 0; i--)
-		iounmap(kproc->rmem[i].cpu_addr);
-	kfree(kproc->rmem);
-release_rmem:
-	of_reserved_mem_device_release(kproc->dev);
-	return ret;
-}
-
-static void k3_dsp_reserved_mem_exit(struct k3_dsp_rproc *kproc)
-{
-	int i;
-
-	for (i = 0; i < kproc->num_rmems; i++)
-		iounmap(kproc->rmem[i].cpu_addr);
-	kfree(kproc->rmem);
-
-	of_reserved_mem_device_release(kproc->dev);
-}
-
-static
-struct ti_sci_proc *k3_dsp_rproc_of_get_tsp(struct device *dev,
-					    const struct ti_sci_handle *sci)
-{
-	struct ti_sci_proc *tsp;
-	u32 temp[2];
-	int ret;
-
-	ret = of_property_read_u32_array(dev->of_node, "ti,sci-proc-ids",
-					 temp, 2);
-	if (ret < 0)
-		return ERR_PTR(ret);
-
-	tsp = kzalloc(sizeof(*tsp), GFP_KERNEL);
-	if (!tsp)
-		return ERR_PTR(-ENOMEM);
-
-	tsp->dev = dev;
-	tsp->sci = sci;
-	tsp->ops = &sci->ops.proc_ops;
-	tsp->proc_id = temp[0];
-	tsp->host_id = temp[1];
-
-	return tsp;
-}
-
-static int k3_dsp_rproc_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct device_node *np = dev->of_node;
-	const struct k3_dsp_dev_data *data;
-	struct k3_dsp_rproc *kproc;
-	struct rproc *rproc;
-	const char *fw_name;
-	bool p_state = false;
-	int ret = 0;
-	int ret1;
-
-	data = of_device_get_match_data(dev);
-	if (!data)
-		return -ENODEV;
-
-	ret = rproc_of_parse_firmware(dev, 0, &fw_name);
-	if (ret)
-		return dev_err_probe(dev, ret, "failed to parse firmware-name property\n");
-
-	rproc = rproc_alloc(dev, dev_name(dev), &k3_dsp_rproc_ops, fw_name,
-			    sizeof(*kproc));
-	if (!rproc)
-		return -ENOMEM;
-
-	rproc->has_iommu = false;
-	rproc->recovery_disabled = true;
-	if (data->uses_lreset) {
-		rproc->ops->prepare = k3_dsp_rproc_prepare;
-		rproc->ops->unprepare = k3_dsp_rproc_unprepare;
-	}
-	kproc = rproc->priv;
-	kproc->rproc = rproc;
-	kproc->dev = dev;
-	kproc->data = data;
-
-	kproc->ti_sci = ti_sci_get_by_phandle(np, "ti,sci");
-	if (IS_ERR(kproc->ti_sci)) {
-		ret = dev_err_probe(dev, PTR_ERR(kproc->ti_sci),
-				    "failed to get ti-sci handle\n");
-		kproc->ti_sci = NULL;
-		goto free_rproc;
-	}
-
-	ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
-	if (ret) {
-		dev_err_probe(dev, ret, "missing 'ti,sci-dev-id' property\n");
-		goto put_sci;
-	}
-
-	kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
-	if (IS_ERR(kproc->reset)) {
-		ret = dev_err_probe(dev, PTR_ERR(kproc->reset),
-				    "failed to get reset\n");
-		goto put_sci;
-	}
-
-	kproc->tsp = k3_dsp_rproc_of_get_tsp(dev, kproc->ti_sci);
-	if (IS_ERR(kproc->tsp)) {
-		ret = dev_err_probe(dev, PTR_ERR(kproc->tsp),
-				    "failed to construct ti-sci proc control\n");
-		goto put_sci;
-	}
-
-	ret = ti_sci_proc_request(kproc->tsp);
-	if (ret < 0) {
-		dev_err_probe(dev, ret, "ti_sci_proc_request failed\n");
-		goto free_tsp;
-	}
-
-	ret = k3_dsp_rproc_of_get_memories(pdev, kproc);
-	if (ret)
-		goto release_tsp;
-
-	ret = k3_dsp_reserved_mem_init(kproc);
-	if (ret) {
-		dev_err_probe(dev, ret, "reserved memory init failed\n");
-		goto release_tsp;
-	}
-
-	ret = kproc->ti_sci->ops.dev_ops.is_on(kproc->ti_sci, kproc->ti_sci_id,
-					       NULL, &p_state);
-	if (ret) {
-		dev_err_probe(dev, ret, "failed to get initial state, mode cannot be determined\n");
-		goto release_mem;
-	}
-
-	/* configure J721E devices for either remoteproc or IPC-only mode */
-	if (p_state) {
-		dev_info(dev, "configured DSP for IPC-only mode\n");
-		rproc->state = RPROC_DETACHED;
-		/* override rproc ops with only required IPC-only mode ops */
-		rproc->ops->prepare = NULL;
-		rproc->ops->unprepare = NULL;
-		rproc->ops->start = NULL;
-		rproc->ops->stop = NULL;
-		rproc->ops->attach = k3_dsp_rproc_attach;
-		rproc->ops->detach = k3_dsp_rproc_detach;
-		rproc->ops->get_loaded_rsc_table = k3_dsp_get_loaded_rsc_table;
-	} else {
-		dev_info(dev, "configured DSP for remoteproc mode\n");
-		/*
-		 * ensure the DSP local reset is asserted to ensure the DSP
-		 * doesn't execute bogus code in .prepare() when the module
-		 * reset is released.
-		 */
-		if (data->uses_lreset) {
-			ret = reset_control_status(kproc->reset);
-			if (ret < 0) {
-				dev_err_probe(dev, ret, "failed to get reset status\n");
-				goto release_mem;
-			} else if (ret == 0) {
-				dev_warn(dev, "local reset is deasserted for device\n");
-				k3_dsp_rproc_reset(kproc);
-			}
-		}
-	}
-
-	ret = rproc_add(rproc);
-	if (ret) {
-		dev_err_probe(dev, ret, "failed to add register device with remoteproc core\n");
-		goto release_mem;
-	}
-
-	platform_set_drvdata(pdev, kproc);
-
-	return 0;
-
-release_mem:
-	k3_dsp_reserved_mem_exit(kproc);
-release_tsp:
-	ret1 = ti_sci_proc_release(kproc->tsp);
-	if (ret1)
-		dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret1));
-free_tsp:
-	kfree(kproc->tsp);
-put_sci:
-	ret1 = ti_sci_put_handle(kproc->ti_sci);
-	if (ret1)
-		dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret1));
-free_rproc:
-	rproc_free(rproc);
-	return ret;
-}
-
-static void k3_dsp_rproc_remove(struct platform_device *pdev)
-{
-	struct k3_dsp_rproc *kproc = platform_get_drvdata(pdev);
-	struct rproc *rproc = kproc->rproc;
-	struct device *dev = &pdev->dev;
-	int ret;
-
-	if (rproc->state == RPROC_ATTACHED) {
-		ret = rproc_detach(rproc);
-		if (ret) {
-			/* Note this error path leaks resources */
-			dev_err(dev, "failed to detach proc (%pe)\n", ERR_PTR(ret));
-			return;
-		}
-	}
-
-	rproc_del(kproc->rproc);
-
-	ret = ti_sci_proc_release(kproc->tsp);
-	if (ret)
-		dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret));
-
-	kfree(kproc->tsp);
-
-	ret = ti_sci_put_handle(kproc->ti_sci);
-	if (ret)
-		dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret));
-
-	k3_dsp_reserved_mem_exit(kproc);
-	rproc_free(kproc->rproc);
-}
-
-static const struct k3_dsp_mem_data c66_mems[] = {
-	{ .name = "l2sram", .dev_addr = 0x800000 },
-	{ .name = "l1pram", .dev_addr = 0xe00000 },
-	{ .name = "l1dram", .dev_addr = 0xf00000 },
-};
-
-/* C71x cores only have a L1P Cache, there are no L1P SRAMs */
-static const struct k3_dsp_mem_data c71_mems[] = {
-	{ .name = "l2sram", .dev_addr = 0x800000 },
-	{ .name = "l1dram", .dev_addr = 0xe00000 },
-};
-
-static const struct k3_dsp_mem_data c7xv_mems[] = {
-	{ .name = "l2sram", .dev_addr = 0x800000 },
-};
-
-static const struct k3_dsp_dev_data c66_data = {
-	.mems = c66_mems,
-	.num_mems = ARRAY_SIZE(c66_mems),
-	.boot_align_addr = SZ_1K,
-	.uses_lreset = true,
-};
-
-static const struct k3_dsp_dev_data c71_data = {
-	.mems = c71_mems,
-	.num_mems = ARRAY_SIZE(c71_mems),
-	.boot_align_addr = SZ_2M,
-	.uses_lreset = false,
-};
-
-static const struct k3_dsp_dev_data c7xv_data = {
-	.mems = c7xv_mems,
-	.num_mems = ARRAY_SIZE(c7xv_mems),
-	.boot_align_addr = SZ_2M,
-	.uses_lreset = false,
-};
-
-static const struct of_device_id k3_dsp_of_match[] = {
-	{ .compatible = "ti,j721e-c66-dsp", .data = &c66_data, },
-	{ .compatible = "ti,j721e-c71-dsp", .data = &c71_data, },
-	{ .compatible = "ti,j721s2-c71-dsp", .data = &c71_data, },
-	{ .compatible = "ti,am62a-c7xv-dsp", .data = &c7xv_data, },
-	{ /* sentinel */ },
-};
-MODULE_DEVICE_TABLE(of, k3_dsp_of_match);
-
-static struct platform_driver k3_dsp_rproc_driver = {
-	.probe	= k3_dsp_rproc_probe,
-	.remove_new = k3_dsp_rproc_remove,
-	.driver	= {
-		.name = "k3-dsp-rproc",
-		.of_match_table = k3_dsp_of_match,
-	},
-};
-
-module_platform_driver(k3_dsp_rproc_driver);
-
-MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * TI K3 DSP Remote Processor(s) driver
+ *
+ * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/
+ *	Suman Anna <s-anna@ti.com>
+ */
+
+#include <linux/io.h>
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/omap-mailbox.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "omap_remoteproc.h"
+#include "remoteproc_internal.h"
+#include "ti_sci_proc.h"
+#include "ti_k3_common.h"
+
+/*
+ * Power up the DSP remote processor.
+ *
+ * This function will be invoked only after the firmware for this rproc
+ * was loaded, parsed successfully, and all of its resource requirements
+ * were met. This callback is invoked only in remoteproc mode.
+ */
+static int k3_dsp_rproc_start(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+	u32 boot_addr;
+	int ret;
+
+	ret = k3_rproc_request_mbox(rproc);
+	if (ret)
+		return ret;
+
+	boot_addr = rproc->bootaddr;
+	if (boot_addr & (kproc->data->boot_align_addr - 1)) {
+		dev_err(dev, "invalid boot address 0x%x, must be aligned on a 0x%x boundary\n",
+			boot_addr, kproc->data->boot_align_addr);
+		ret = -EINVAL;
+		goto put_mbox;
+	}
+
+	dev_err(dev, "booting DSP core using boot addr = 0x%x\n", boot_addr);
+	ret = ti_sci_proc_set_config(kproc->tsp, boot_addr, 0, 0);
+	if (ret)
+		goto put_mbox;
+
+	ret = k3_rproc_release(kproc);
+	if (ret)
+		goto put_mbox;
+
+	return 0;
+
+put_mbox:
+	mbox_free_channel(kproc->mbox);
+	return ret;
+}
+
+/*
+ * Stop the DSP remote processor.
+ *
+ * This function puts the DSP processor into reset, and finishes processing
+ * of any pending messages. This callback is invoked only in remoteproc mode.
+ */
+static int k3_dsp_rproc_stop(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+
+	mbox_free_channel(kproc->mbox);
+
+	k3_rproc_reset(kproc);
+
+	return 0;
+}
+
+/*
+ * Attach to a running DSP remote processor (IPC-only mode)
+ *
+ * This rproc attach callback only needs to request the mailbox, the remote
+ * processor is already booted, so there is no need to issue any TI-SCI
+ * commands to boot the DSP core. This callback is invoked only in IPC-only
+ * mode.
+ */
+static int k3_dsp_rproc_attach(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+	int ret;
+
+	ret = k3_rproc_request_mbox(rproc);
+	if (ret)
+		return ret;
+
+	dev_info(dev, "DSP initialized in IPC-only mode\n");
+	return 0;
+}
+
+/*
+ * Detach from a running DSP remote processor (IPC-only mode)
+ *
+ * This rproc detach callback performs the opposite operation to attach callback
+ * and only needs to release the mailbox, the DSP core is not stopped and will
+ * be left to continue to run its booted firmware. This callback is invoked only
+ * in IPC-only mode.
+ */
+static int k3_dsp_rproc_detach(struct rproc *rproc)
+{
+	struct k3_rproc *kproc = rproc->priv;
+	struct device *dev = kproc->dev;
+
+	mbox_free_channel(kproc->mbox);
+	dev_info(dev, "DSP deinitialized in IPC-only mode\n");
+	return 0;
+}
+
+
+static const struct rproc_ops k3_dsp_rproc_ops = {
+	.start		= k3_dsp_rproc_start,
+	.stop		= k3_dsp_rproc_stop,
+	.kick		= k3_rproc_kick,
+	.da_to_va	= k3_rproc_da_to_va,
+};
+
+static int k3_dsp_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	const struct k3_rproc_dev_data *data;
+	struct k3_rproc *kproc;
+	struct rproc *rproc;
+	const char *fw_name;
+	bool p_state = false;
+	int ret = 0;
+	int ret1;
+
+	data = of_device_get_match_data(dev);
+	if (!data)
+		return -ENODEV;
+
+	ret = rproc_of_parse_firmware(dev, 0, &fw_name);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to parse firmware-name property\n");
+
+	rproc = rproc_alloc(dev, dev_name(dev), &k3_dsp_rproc_ops, fw_name,
+			    sizeof(*kproc));
+	if (!rproc)
+		return -ENOMEM;
+
+	rproc->has_iommu = false;
+	rproc->recovery_disabled = true;
+	if (data->uses_lreset) {
+		rproc->ops->prepare = k3_rproc_prepare;
+		rproc->ops->unprepare = k3_rproc_unprepare;
+	}
+	kproc = rproc->priv;
+	kproc->rproc = rproc;
+	kproc->dev = dev;
+	kproc->data = data;
+
+	kproc->ti_sci = ti_sci_get_by_phandle(np, "ti,sci");
+	if (IS_ERR(kproc->ti_sci)) {
+		ret = dev_err_probe(dev, PTR_ERR(kproc->ti_sci),
+				    "failed to get ti-sci handle\n");
+		kproc->ti_sci = NULL;
+		goto free_rproc;
+	}
+
+	ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
+	if (ret) {
+		dev_err_probe(dev, ret, "missing 'ti,sci-dev-id' property\n");
+		goto put_sci;
+	}
+
+	kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(kproc->reset)) {
+		ret = dev_err_probe(dev, PTR_ERR(kproc->reset),
+				    "failed to get reset\n");
+		goto put_sci;
+	}
+
+	kproc->tsp = k3_rproc_of_get_tsp(dev, kproc->ti_sci);
+	if (IS_ERR(kproc->tsp)) {
+		ret = dev_err_probe(dev, PTR_ERR(kproc->tsp),
+				    "failed to construct ti-sci proc control\n");
+		goto put_sci;
+	}
+
+	ret = ti_sci_proc_request(kproc->tsp);
+	if (ret < 0) {
+		dev_err_probe(dev, ret, "ti_sci_proc_request failed\n");
+		goto free_tsp;
+	}
+
+	ret = k3_rproc_of_get_memories(pdev, kproc);
+	if (ret)
+		goto release_tsp;
+
+	ret = k3_reserved_mem_init(kproc);
+	if (ret) {
+		dev_err_probe(dev, ret, "reserved memory init failed\n");
+		goto release_tsp;
+	}
+
+	ret = kproc->ti_sci->ops.dev_ops.is_on(kproc->ti_sci, kproc->ti_sci_id,
+					       NULL, &p_state);
+	if (ret) {
+		dev_err_probe(dev, ret, "failed to get initial state, mode cannot be determined\n");
+		goto release_mem;
+	}
+
+	/* configure J721E devices for either remoteproc or IPC-only mode */
+	if (p_state) {
+		dev_info(dev, "configured DSP for IPC-only mode\n");
+		rproc->state = RPROC_DETACHED;
+		/* override rproc ops with only required IPC-only mode ops */
+		rproc->ops->prepare = NULL;
+		rproc->ops->unprepare = NULL;
+		rproc->ops->start = NULL;
+		rproc->ops->stop = NULL;
+		rproc->ops->attach = k3_dsp_rproc_attach;
+		rproc->ops->detach = k3_dsp_rproc_detach;
+		rproc->ops->get_loaded_rsc_table = k3_get_loaded_rsc_table;
+	} else {
+		dev_info(dev, "configured DSP for remoteproc mode\n");
+		/*
+		 * ensure the DSP local reset is asserted to ensure the DSP
+		 * doesn't execute bogus code in .prepare() when the module
+		 * reset is released.
+		 */
+		if (data->uses_lreset) {
+			ret = reset_control_status(kproc->reset);
+			if (ret < 0) {
+				dev_err_probe(dev, ret, "failed to get reset status\n");
+				goto release_mem;
+			} else if (ret == 0) {
+				dev_warn(dev, "local reset is deasserted for device\n");
+				k3_rproc_reset(kproc);
+			}
+		}
+	}
+
+	ret = rproc_add(rproc);
+	if (ret) {
+		dev_err_probe(dev, ret, "failed to add register device with remoteproc core\n");
+		goto release_mem;
+	}
+
+	platform_set_drvdata(pdev, kproc);
+
+	return 0;
+
+release_mem:
+	k3_reserved_mem_exit(kproc);
+release_tsp:
+	ret1 = ti_sci_proc_release(kproc->tsp);
+	if (ret1)
+		dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret1));
+free_tsp:
+	kfree(kproc->tsp);
+put_sci:
+	ret1 = ti_sci_put_handle(kproc->ti_sci);
+	if (ret1)
+		dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret1));
+free_rproc:
+	rproc_free(rproc);
+	return ret;
+}
+
+static void k3_dsp_rproc_remove(struct platform_device *pdev)
+{
+	struct k3_rproc *kproc = platform_get_drvdata(pdev);
+	struct rproc *rproc = kproc->rproc;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	if (rproc->state == RPROC_ATTACHED) {
+		ret = rproc_detach(rproc);
+		if (ret) {
+			/* Note this error path leaks resources */
+			dev_err(dev, "failed to detach proc (%pe)\n", ERR_PTR(ret));
+			return;
+		}
+	}
+
+	rproc_del(kproc->rproc);
+
+	ret = ti_sci_proc_release(kproc->tsp);
+	if (ret)
+		dev_err(dev, "failed to release proc (%pe)\n", ERR_PTR(ret));
+
+	kfree(kproc->tsp);
+
+	ret = ti_sci_put_handle(kproc->ti_sci);
+	if (ret)
+		dev_err(dev, "failed to put ti_sci handle (%pe)\n", ERR_PTR(ret));
+
+	k3_reserved_mem_exit(kproc);
+	rproc_free(kproc->rproc);
+}
+
+static const struct k3_rproc_mem_data c66_mems[] = {
+	{ .name = "l2sram", .dev_addr = 0x800000 },
+	{ .name = "l1pram", .dev_addr = 0xe00000 },
+	{ .name = "l1dram", .dev_addr = 0xf00000 },
+};
+
+/* C71x cores only have a L1P Cache, there are no L1P SRAMs */
+static const struct k3_rproc_mem_data c71_mems[] = {
+	{ .name = "l2sram", .dev_addr = 0x800000 },
+	{ .name = "l1dram", .dev_addr = 0xe00000 },
+};
+
+static const struct k3_rproc_mem_data c7xv_mems[] = {
+	{ .name = "l2sram", .dev_addr = 0x800000 },
+};
+
+static const struct k3_rproc_dev_data c66_data = {
+	.mems = c66_mems,
+	.num_mems = ARRAY_SIZE(c66_mems),
+	.boot_align_addr = SZ_1K,
+	.uses_lreset = true,
+};
+
+static const struct k3_rproc_dev_data c71_data = {
+	.mems = c71_mems,
+	.num_mems = ARRAY_SIZE(c71_mems),
+	.boot_align_addr = SZ_2M,
+	.uses_lreset = false,
+};
+
+static const struct k3_rproc_dev_data c7xv_data = {
+	.mems = c7xv_mems,
+	.num_mems = ARRAY_SIZE(c7xv_mems),
+	.boot_align_addr = SZ_2M,
+	.uses_lreset = false,
+};
+
+static const struct of_device_id k3_dsp_of_match[] = {
+	{ .compatible = "ti,j721e-c66-dsp", .data = &c66_data, },
+	{ .compatible = "ti,j721e-c71-dsp", .data = &c71_data, },
+	{ .compatible = "ti,j721s2-c71-dsp", .data = &c71_data, },
+	{ .compatible = "ti,am62a-c7xv-dsp", .data = &c7xv_data, },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, k3_dsp_of_match);
+
+static struct platform_driver k3_dsp_rproc_driver = {
+	.probe	= k3_dsp_rproc_probe,
+	.remove_new = k3_dsp_rproc_remove,
+	.driver	= {
+		.name = "k3-dsp-rproc",
+		.of_match_table = k3_dsp_of_match,
+	},
+};
+
+module_platform_driver(k3_dsp_rproc_driver);
+
+MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI K3 DSP Remoteproc driver");
-- 
2.34.1