linux/drivers/remoteproc/ti_k3_dsp_remoteproc.c
Suman Anna b843192039 remoteproc: k3-dsp: Add support for IPC-only mode for all K3 DSPs
Add support to the K3 DSP remoteproc driver to configure all the C66x
and C71x cores on J721E SoCs to be either in IPC-only mode or the
traditional remoteproc mode. The IPC-only mode expects that the remote
processors are already booted by the bootloader, and only perform the
minimum steps required to initialize and deinitialize the virtio IPC
transports. The remoteproc mode allows the kernel remoteproc driver to
do the regular load and boot and other device management operations for
a DSP.

The IPC-only mode for a DSP is detected and configured at driver probe
time by querying the System Firmware for the DSP power and reset state
and/or status and making sure that the DSP is indeed started by the
bootloaders, otherwise the device is configured for remoteproc mode.

Support for IPC-only mode is achieved through .attach(), .detach() and
.get_loaded_rsc_table() callback ops and zeroing out the regular rproc
ops .prepare(), .unprepare(), .start() and .stop(). The resource table
follows a design-by-contract approach and is expected to be at the base
of the DDR firmware region reserved for each remoteproc, it is mostly
expected to contain only the virtio device and trace resource entries.

NOTE:
The driver cannot configure a DSP core for remoteproc mode by any
means without rebooting the kernel if that DSP core has been started
by a bootloader.  This is the current desired behavior and can be
enhanced in the future if the feature is needed.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220213201246.25952-6-s-anna@ti.com
2022-03-11 14:31:56 -06:00

909 lines
25 KiB
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_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"
#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, status = %d\n",
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, 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;
}
/* 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, 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;
}
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: %d\n", 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, ret = %d\n",
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, ret = %d\n", 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, 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;
}
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) {
dev_err(dev, "failed to parse firmware-name property, ret = %d\n",
ret);
return ret;
}
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 = PTR_ERR(kproc->ti_sci);
if (ret != -EPROBE_DEFER) {
dev_err(dev, "failed to get ti-sci handle, ret = %d\n",
ret);
}
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(dev, "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 = PTR_ERR(kproc->reset);
dev_err(dev, "failed to get reset, status = %d\n", ret);
goto put_sci;
}
kproc->tsp = k3_dsp_rproc_of_get_tsp(dev, kproc->ti_sci);
if (IS_ERR(kproc->tsp)) {
dev_err(dev, "failed to construct ti-sci proc control, ret = %d\n",
ret);
ret = PTR_ERR(kproc->tsp);
goto put_sci;
}
ret = ti_sci_proc_request(kproc->tsp);
if (ret < 0) {
dev_err(dev, "ti_sci_proc_request failed, ret = %d\n", ret);
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(dev, "reserved memory init failed, ret = %d\n", ret);
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(dev, "failed to get initial state, mode cannot be determined, ret = %d\n",
ret);
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(dev, "failed to get reset status, status = %d\n",
ret);
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(dev, "failed to add register device with remoteproc core, status = %d\n",
ret);
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, ret = %d\n", 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, ret = %d\n", ret1);
free_rproc:
rproc_free(rproc);
return ret;
}
static int 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, ret = %d\n", ret);
return ret;
}
}
rproc_del(kproc->rproc);
ret = ti_sci_proc_release(kproc->tsp);
if (ret)
dev_err(dev, "failed to release proc, ret = %d\n", ret);
kfree(kproc->tsp);
ret = ti_sci_put_handle(kproc->ti_sci);
if (ret)
dev_err(dev, "failed to put ti_sci handle, ret = %d\n", ret);
k3_dsp_reserved_mem_exit(kproc);
rproc_free(kproc->rproc);
return 0;
}
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_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 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, },
{ /* 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");