Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...

[drm/drm-misc.git] / drivers / remoteproc / ti_k3_dsp_remoteproc.c

// 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);

        /* Do not forward messages from a detached core */
        if (kproc->rproc->state == RPROC_DETACHED)
                return;

        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;

        /* Do not forward messages to a detached core */
        if (kproc->rproc->state == RPROC_DETACHED)
                return;

        /* 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))
                return dev_err_probe(dev, PTR_ERR(kproc->mbox),
                                     "mbox_request_channel failed\n");

        /*
         * 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;

        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);
                return -EINVAL;
        }

        dev_dbg(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)
                return ret;

        ret = k3_dsp_rproc_release(kproc);
        if (ret)
                return ret;

        return 0;
}

/*
 * 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;

        k3_dsp_rproc_reset(kproc);

        return 0;
}

/*
 * Attach to a running DSP remote processor (IPC-only mode)
 *
 * This rproc attach callback is a NOP. The remote processor is already booted,
 * and all required resources have been acquired during probe routine, 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 and exists because rproc_validate() checks
 * for its existence.
 */
static int k3_dsp_rproc_attach(struct rproc *rproc) { return 0; }

/*
 * Detach from a running DSP remote processor (IPC-only mode)
 *
 * This rproc detach callback is a NOP. 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 and exists for sanity sake.
 */
static int k3_dsp_rproc_detach(struct rproc *rproc) { 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 (__force 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 void k3_dsp_mem_release(void *data)
{
        struct device *dev = data;

        of_reserved_mem_device_release(dev);
}

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;
        }
        ret = devm_add_action_or_reset(dev, k3_dsp_mem_release, dev);
        if (ret)
                return ret;

        num_rmems--;
        kproc->rmem = devm_kcalloc(dev, num_rmems, sizeof(*kproc->rmem), GFP_KERNEL);
        if (!kproc->rmem)
                return -ENOMEM;

        /* 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)
                        return -EINVAL;

                rmem = of_reserved_mem_lookup(rmem_np);
                of_node_put(rmem_np);
                if (!rmem)
                        return -EINVAL;

                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 = devm_ioremap_wc(dev, 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);
                        return -ENOMEM;
                }

                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;
}

static void k3_dsp_release_tsp(void *data)
{
        struct ti_sci_proc *tsp = data;

        ti_sci_proc_release(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;

        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 = devm_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;

        ret = k3_dsp_rproc_request_mbox(rproc);
        if (ret)
                return ret;

        kproc->ti_sci = devm_ti_sci_get_by_phandle(dev, "ti,sci");
        if (IS_ERR(kproc->ti_sci))
                return dev_err_probe(dev, PTR_ERR(kproc->ti_sci),
                                     "failed to get ti-sci handle\n");

        ret = of_property_read_u32(np, "ti,sci-dev-id", &kproc->ti_sci_id);
        if (ret)
                return dev_err_probe(dev, ret, "missing 'ti,sci-dev-id' property\n");

        kproc->reset = devm_reset_control_get_exclusive(dev, NULL);
        if (IS_ERR(kproc->reset))
                return dev_err_probe(dev, PTR_ERR(kproc->reset),
                                     "failed to get reset\n");

        kproc->tsp = ti_sci_proc_of_get_tsp(dev, kproc->ti_sci);
        if (IS_ERR(kproc->tsp))
                return dev_err_probe(dev, PTR_ERR(kproc->tsp),
                                     "failed to construct ti-sci proc control\n");

        ret = ti_sci_proc_request(kproc->tsp);
        if (ret < 0) {
                dev_err_probe(dev, ret, "ti_sci_proc_request failed\n");
                return ret;
        }
        ret = devm_add_action_or_reset(dev, k3_dsp_release_tsp, kproc->tsp);
        if (ret)
                return ret;

        ret = k3_dsp_rproc_of_get_memories(pdev, kproc);
        if (ret)
                return ret;

        ret = k3_dsp_reserved_mem_init(kproc);
        if (ret)
                return dev_err_probe(dev, ret, "reserved memory init failed\n");

        ret = kproc->ti_sci->ops.dev_ops.is_on(kproc->ti_sci, kproc->ti_sci_id,
                                               NULL, &p_state);
        if (ret)
                return dev_err_probe(dev, ret, "failed to get initial state, mode cannot be determined\n");

        /* 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) {
                                return dev_err_probe(dev, ret, "failed to get reset status\n");
                        } else if (ret == 0) {
                                dev_warn(dev, "local reset is deasserted for device\n");
                                k3_dsp_rproc_reset(kproc);
                        }
                }
        }

        ret = devm_rproc_add(dev, rproc);
        if (ret)
                return dev_err_probe(dev, ret, "failed to add register device with remoteproc core\n");

        platform_set_drvdata(pdev, kproc);

        return 0;
}

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)
                        dev_err(dev, "failed to detach proc (%pe)\n", ERR_PTR(ret));
        }

        mbox_free_channel(kproc->mbox);
}

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 = 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");