[PATCH v6 22/34] xlink-core: Enable VPU IP management and runtime control

From: mgross
Date: Fri Feb 12 2021 - 17:32:12 EST

From: Seamus Kelly <seamus.kelly@xxxxxxxxx>

Enable VPU management including, enumeration, boot and runtime control.

Add APIs:
write control data:
used to transmit small, local data
start vpu:
calls boot_device API ( soon to be deprecated )
stop vpu
calls reset_device API ( soon to be deprecated )
reset vpu
calls reset_device API ( soon to be deprecated )
get device name:
Returns the device name for the input device id
This could be a char device path, for example "/dev/ttyUSB0"
for a serial device; or it could be a device string
description, for example, for PCIE "00:00.0 Host bridge: Intel
Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 01)"
get device list:
Returns the list of software device IDs for all connected
physical devices
get device status:
returns the current state of the input device
OFF - The device is off (D3cold/Slot power removed).
BUSY - device is busy and not available (device is booting)
READY - device is available for use
ERROR - device HW failure is detected
RECOVERY - device is in recovery mode, waiting for recovery operations
boot device:
When used on the remote host - starts the SOC device by calling
corresponding function from VPU Driver.
Takes firmware's 'binary_name' as input.
For Linux, the firmware image is expected to be located in
'/lib/firmware' folder or its subfolders.
For Linux, 'binary_name' is not a path but an image name that
will be searched in the default Linux search paths ('/lib/firmware').
When used on the local host - triggers the booting of VPUIP device.
reset device:
When used on the remote host - resets the device by calling
corresponding VPU Driver function.
When used on the local host - resets the VPUIP device
get device mode:
query and returns the current device power mode
set device mode:
used for device throttling or entering various power modes


Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Reviewed-by: Mark Gross <mgross@xxxxxxxxxxxxxxx>
Signed-off-by: Mark Gross <mgross@xxxxxxxxxxxxxxx>
Signed-off-by: Seamus Kelly <seamus.kelly@xxxxxxxxx>
---
drivers/misc/xlink-core/xlink-core.c | 235 ++++++++++++++++++++
drivers/misc/xlink-core/xlink-defs.h | 2 +
drivers/misc/xlink-core/xlink-ioctl.c | 214 ++++++++++++++++++
drivers/misc/xlink-core/xlink-ioctl.h | 9 +
drivers/misc/xlink-core/xlink-multiplexer.c | 56 +++++
drivers/misc/xlink-core/xlink-platform.c | 86 +++++++
include/linux/xlink.h | 27 +++
7 files changed, 629 insertions(+)

diff --git a/drivers/misc/xlink-core/xlink-core.c b/drivers/misc/xlink-core/xlink-core.c
index bdbf8c6a99ca..d0a3f98d16af 100644
--- a/drivers/misc/xlink-core/xlink-core.c
+++ b/drivers/misc/xlink-core/xlink-core.c
@@ -73,6 +73,8 @@ struct keembay_xlink_dev {
struct mutex lock; // protect access to xlink_dev
};

+static u8 volbuf[XLINK_MAX_BUF_SIZE]; // buffer for volatile transactions
+
/*
* global variable pointing to our xlink device.
*
@@ -264,6 +266,9 @@ static long xlink_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case XL_READ_DATA:
rc = ioctl_read_data(arg);
break;
+ case XL_READ_TO_BUFFER:
+ rc = ioctl_read_to_buffer(arg);
+ break;
case XL_WRITE_DATA:
rc = ioctl_write_data(arg);
break;
@@ -276,9 +281,39 @@ static long xlink_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case XL_CLOSE_CHANNEL:
rc = ioctl_close_channel(arg);
break;
+ case XL_START_VPU:
+ rc = ioctl_start_vpu(arg);
+ break;
+ case XL_STOP_VPU:
+ rc = xlink_stop_vpu();
+ break;
+ case XL_RESET_VPU:
+ rc = xlink_stop_vpu();
+ break;
case XL_DISCONNECT:
rc = ioctl_disconnect(arg);
break;
+ case XL_GET_DEVICE_NAME:
+ rc = ioctl_get_device_name(arg);
+ break;
+ case XL_GET_DEVICE_LIST:
+ rc = ioctl_get_device_list(arg);
+ break;
+ case XL_GET_DEVICE_STATUS:
+ rc = ioctl_get_device_status(arg);
+ break;
+ case XL_BOOT_DEVICE:
+ rc = ioctl_boot_device(arg);
+ break;
+ case XL_RESET_DEVICE:
+ rc = ioctl_reset_device(arg);
+ break;
+ case XL_GET_DEVICE_MODE:
+ rc = ioctl_get_device_mode(arg);
+ break;
+ case XL_SET_DEVICE_MODE:
+ rc = ioctl_set_device_mode(arg);
+ break;
}
if (rc)
return -EIO;
@@ -289,6 +324,30 @@ static long xlink_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
/*
* xlink Kernel API.
*/
+enum xlink_error xlink_stop_vpu(void)
+{
+#ifdef CONFIG_XLINK_LOCAL_HOST
+ int rc;
+
+ rc = xlink_ipc_reset_device(0x0); // stop vpu slice 0
+ if (rc)
+ return X_LINK_ERROR;
+#endif
+ return X_LINK_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(xlink_stop_vpu);
+enum xlink_error xlink_start_vpu(char *filename)
+{
+#ifdef CONFIG_XLINK_LOCAL_HOST
+ int rc;
+
+ rc = xlink_ipc_boot_device(0x0, filename); // start vpu slice 0
+ if (rc)
+ return X_LINK_ERROR;
+#endif
+ return X_LINK_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(xlink_start_vpu);

enum xlink_error xlink_initialize(void)
{
@@ -527,6 +586,34 @@ enum xlink_error xlink_write_data_user(struct xlink_handle *handle,
return rc;
}

+enum xlink_error xlink_write_control_data(struct xlink_handle *handle,
+ u16 chan, u8 const *pmessage,
+ u32 size)
+{
+ struct xlink_event *event;
+ struct xlink_link *link;
+ int event_queued = 0;
+ enum xlink_error rc;
+
+ if (!xlink || !handle)
+ return X_LINK_ERROR;
+ if (size > XLINK_MAX_CONTROL_DATA_SIZE)
+ return X_LINK_ERROR; // TODO: XLink Parameter Error
+ link = get_link_by_sw_device_id(handle->sw_device_id);
+ if (!link)
+ return X_LINK_ERROR;
+ event = xlink_create_event(link->id, XLINK_WRITE_CONTROL_REQ,
+ &link->handle, chan, size, 0);
+ if (!event)
+ return X_LINK_ERROR;
+ memcpy(event->header.control_data, pmessage, size);
+ rc = xlink_multiplexer_tx(event, &event_queued);
+ if (!event_queued)
+ xlink_destroy_event(event);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_write_control_data);
+
enum xlink_error xlink_write_volatile(struct xlink_handle *handle,
u16 chan, u8 const *message, u32 size)
{
@@ -711,6 +798,154 @@ enum xlink_error xlink_disconnect(struct xlink_handle *handle)
}
EXPORT_SYMBOL_GPL(xlink_disconnect);

+enum xlink_error xlink_get_device_list(u32 *sw_device_id_list,
+ u32 *num_devices)
+{
+ u32 interface_nmb_devices = 0;
+ enum xlink_error rc;
+ int i;
+
+ if (!xlink)
+ return X_LINK_ERROR;
+ if (!sw_device_id_list || !num_devices)
+ return X_LINK_ERROR;
+ /* loop through each interface and combine the lists */
+ for (i = 0; i < NMB_OF_INTERFACES; i++) {
+ rc = xlink_platform_get_device_list(i, sw_device_id_list,
+ &interface_nmb_devices);
+ if (!rc) {
+ *num_devices += interface_nmb_devices;
+ sw_device_id_list += interface_nmb_devices;
+ }
+ interface_nmb_devices = 0;
+ }
+ return X_LINK_SUCCESS;
+}
+EXPORT_SYMBOL_GPL(xlink_get_device_list);
+enum xlink_error xlink_get_device_name(struct xlink_handle *handle, char *name,
+ size_t name_size)
+{
+ enum xlink_error rc;
+ int interface;
+
+ if (!xlink || !handle)
+ return X_LINK_ERROR;
+ if (!name || !name_size)
+ return X_LINK_ERROR;
+ interface = get_interface_from_sw_device_id(handle->sw_device_id);
+ if (interface == NULL_INTERFACE)
+ return X_LINK_ERROR;
+ rc = xlink_platform_get_device_name(interface, handle->sw_device_id,
+ name, name_size);
+ if (rc)
+ rc = X_LINK_ERROR;
+ else
+ rc = X_LINK_SUCCESS;
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_get_device_name);
+enum xlink_error xlink_get_device_status(struct xlink_handle *handle,
+ u32 *device_status)
+{
+ enum xlink_error rc;
+ u32 interface;
+
+ if (!xlink)
+ return X_LINK_ERROR;
+ if (!device_status)
+ return X_LINK_ERROR;
+ interface = get_interface_from_sw_device_id(handle->sw_device_id);
+ if (interface == NULL_INTERFACE)
+ return X_LINK_ERROR;
+ rc = xlink_platform_get_device_status(interface, handle->sw_device_id,
+ device_status);
+ if (rc)
+ rc = X_LINK_ERROR;
+ else
+ rc = X_LINK_SUCCESS;
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_get_device_status);
+enum xlink_error xlink_boot_device(struct xlink_handle *handle,
+ const char *binary_name)
+{
+ enum xlink_error rc;
+ u32 interface;
+
+ if (!xlink || !handle)
+ return X_LINK_ERROR;
+ if (!binary_name)
+ return X_LINK_ERROR;
+ interface = get_interface_from_sw_device_id(handle->sw_device_id);
+ if (interface == NULL_INTERFACE)
+ return X_LINK_ERROR;
+ rc = xlink_platform_boot_device(interface, handle->sw_device_id,
+ binary_name);
+ if (rc)
+ rc = X_LINK_ERROR;
+ else
+ rc = X_LINK_SUCCESS;
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_boot_device);
+enum xlink_error xlink_reset_device(struct xlink_handle *handle)
+{
+ enum xlink_error rc;
+ u32 interface;
+
+ if (!xlink || !handle)
+ return X_LINK_ERROR;
+ interface = get_interface_from_sw_device_id(handle->sw_device_id);
+ if (interface == NULL_INTERFACE)
+ return X_LINK_ERROR;
+ rc = xlink_platform_reset_device(interface, handle->sw_device_id);
+ if (rc)
+ rc = X_LINK_ERROR;
+ else
+ rc = X_LINK_SUCCESS;
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_reset_device);
+enum xlink_error xlink_set_device_mode(struct xlink_handle *handle,
+ enum xlink_device_power_mode power_mode)
+{
+ enum xlink_error rc;
+ u32 interface;
+
+ if (!xlink || !handle)
+ return X_LINK_ERROR;
+ interface = get_interface_from_sw_device_id(handle->sw_device_id);
+ if (interface == NULL_INTERFACE)
+ return X_LINK_ERROR;
+ rc = xlink_platform_set_device_mode(interface, handle->sw_device_id,
+ power_mode);
+ if (rc)
+ rc = X_LINK_ERROR;
+ else
+ rc = X_LINK_SUCCESS;
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_set_device_mode);
+enum xlink_error xlink_get_device_mode(struct xlink_handle *handle,
+ enum xlink_device_power_mode *power_mode)
+{
+ enum xlink_error rc;
+ u32 interface;
+
+ if (!xlink || !handle)
+ return X_LINK_ERROR;
+ interface = get_interface_from_sw_device_id(handle->sw_device_id);
+ if (interface == NULL_INTERFACE)
+ return X_LINK_ERROR;
+ rc = xlink_platform_get_device_mode(interface, handle->sw_device_id,
+ power_mode);
+ if (rc)
+ rc = X_LINK_ERROR;
+ else
+ rc = X_LINK_SUCCESS;
+ return rc;
+}
+EXPORT_SYMBOL_GPL(xlink_get_device_mode);
/* Device tree driver match. */
static const struct of_device_id kmb_xlink_of_match[] = {
{
diff --git a/drivers/misc/xlink-core/xlink-defs.h b/drivers/misc/xlink-core/xlink-defs.h
index 09aee36d5542..8985f6631175 100644
--- a/drivers/misc/xlink-core/xlink-defs.h
+++ b/drivers/misc/xlink-core/xlink-defs.h
@@ -101,6 +101,7 @@ enum xlink_event_type {
XLINK_OPEN_CHANNEL_REQ,
XLINK_CLOSE_CHANNEL_REQ,
XLINK_PING_REQ,
+ XLINK_WRITE_CONTROL_REQ,
XLINK_REQ_LAST,
// response events
XLINK_WRITE_RESP = 0x10,
@@ -111,6 +112,7 @@ enum xlink_event_type {
XLINK_OPEN_CHANNEL_RESP,
XLINK_CLOSE_CHANNEL_RESP,
XLINK_PING_RESP,
+ XLINK_WRITE_CONTROL_RESP,
XLINK_RESP_LAST,
};

diff --git a/drivers/misc/xlink-core/xlink-ioctl.c b/drivers/misc/xlink-core/xlink-ioctl.c
index 1f75ad38137b..90947bbccfed 100644
--- a/drivers/misc/xlink-core/xlink-ioctl.c
+++ b/drivers/misc/xlink-core/xlink-ioctl.c
@@ -111,6 +111,34 @@ int ioctl_read_data(unsigned long arg)
return copy_result_to_user(rd.return_code, rc);
}

+int ioctl_read_to_buffer(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkreadtobuffer rdtobuf = {};
+ int rc = 0;
+ u32 size;
+ u8 volbuf[XLINK_MAX_BUF_SIZE]; // buffer for volatile transactions
+
+ if (copy_from_user(&rdtobuf, (void __user *)arg,
+ sizeof(struct xlinkreadtobuffer)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)rdtobuf.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ rc = xlink_read_data_to_buffer(&devh, rdtobuf.chan,
+ (u8 *)volbuf, &size);
+ if (!rc) {
+ if (copy_to_user((void __user *)rdtobuf.pmessage, (void *)volbuf,
+ size))
+ return -EFAULT;
+ if (copy_to_user((void __user *)rdtobuf.size, (void *)&size,
+ sizeof(size)))
+ return -EFAULT;
+ }
+
+ return copy_result_to_user(rdtobuf.return_code, rc);
+}
+
int ioctl_write_data(unsigned long arg)
{
struct xlink_handle devh = {};
@@ -194,6 +222,26 @@ int ioctl_close_channel(unsigned long arg)
return copy_result_to_user(op.return_code, rc);
}

+int ioctl_start_vpu(unsigned long arg)
+{
+ struct xlinkstartvpu startvpu = {};
+ char filename[64];
+ int rc = 0;
+
+ if (copy_from_user(&startvpu, (void __user *)arg,
+ sizeof(struct xlinkstartvpu)))
+ return -EFAULT;
+ if (startvpu.namesize > sizeof(filename))
+ return -EINVAL;
+ memset(filename, 0, sizeof(filename));
+ if (copy_from_user(filename, (void __user *)startvpu.filename,
+ startvpu.namesize))
+ return -EFAULT;
+ rc = xlink_start_vpu(filename);
+
+ return copy_result_to_user(startvpu.return_code, rc);
+}
+
int ioctl_disconnect(unsigned long arg)
{
struct xlink_handle devh = {};
@@ -210,3 +258,169 @@ int ioctl_disconnect(unsigned long arg)

return copy_result_to_user(con.return_code, rc);
}
+
+int ioctl_get_device_name(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkgetdevicename devn = {};
+ char name[XLINK_MAX_DEVICE_NAME_SIZE];
+ int rc = 0;
+
+ if (copy_from_user(&devn, (void __user *)arg,
+ sizeof(struct xlinkgetdevicename)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)devn.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ if (devn.name_size <= XLINK_MAX_DEVICE_NAME_SIZE) {
+ rc = xlink_get_device_name(&devh, name, devn.name_size);
+ if (!rc) {
+ if (copy_to_user((void __user *)devn.name, (void *)name,
+ devn.name_size))
+ return -EFAULT;
+ }
+ } else {
+ rc = X_LINK_ERROR;
+ }
+
+ return copy_result_to_user(devn.return_code, rc);
+}
+
+int ioctl_get_device_list(unsigned long arg)
+{
+ struct xlinkgetdevicelist devl = {};
+ u32 sw_device_id_list[XLINK_MAX_DEVICE_LIST_SIZE];
+ u32 num_devices = 0;
+ int rc = 0;
+
+ if (copy_from_user(&devl, (void __user *)arg,
+ sizeof(struct xlinkgetdevicelist)))
+ return -EFAULT;
+ rc = xlink_get_device_list(sw_device_id_list, &num_devices);
+ if (!rc && num_devices <= XLINK_MAX_DEVICE_LIST_SIZE) {
+ /* TODO: this next copy is dangerous! we have no idea
+ * how large the devl.sw_device_id_list buffer is
+ * provided by the user. if num_devices is too large,
+ * the copy will overflow the buffer.
+ */
+ if (copy_to_user((void __user *)devl.sw_device_id_list,
+ (void *)sw_device_id_list,
+ (sizeof(*sw_device_id_list)
+ * num_devices)))
+ return -EFAULT;
+ if (copy_to_user((void __user *)devl.num_devices, (void *)&num_devices,
+ (sizeof(num_devices))))
+ return -EFAULT;
+ }
+
+ return copy_result_to_user(devl.return_code, rc);
+}
+
+int ioctl_get_device_status(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkgetdevicestatus devs = {};
+ u32 device_status = 0;
+ int rc = 0;
+
+ if (copy_from_user(&devs, (void __user *)arg,
+ sizeof(struct xlinkgetdevicestatus)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)devs.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ rc = xlink_get_device_status(&devh, &device_status);
+ if (!rc) {
+ if (copy_to_user((void __user *)devs.device_status,
+ (void *)&device_status,
+ sizeof(device_status)))
+ return -EFAULT;
+ }
+
+ return copy_result_to_user(devs.return_code, rc);
+}
+
+int ioctl_boot_device(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkbootdevice boot = {};
+ char filename[64];
+ int rc = 0;
+
+ if (copy_from_user(&boot, (void __user *)arg,
+ sizeof(struct xlinkbootdevice)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)boot.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ if (boot.binary_name_size > sizeof(filename))
+ return -EINVAL;
+ memset(filename, 0, sizeof(filename));
+ if (copy_from_user(filename, (void __user *)boot.binary_name,
+ boot.binary_name_size))
+ return -EFAULT;
+ rc = xlink_boot_device(&devh, filename);
+
+ return copy_result_to_user(boot.return_code, rc);
+}
+
+int ioctl_reset_device(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkresetdevice res = {};
+ int rc = 0;
+
+ if (copy_from_user(&res, (void __user *)arg,
+ sizeof(struct xlinkresetdevice)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)res.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ rc = xlink_reset_device(&devh);
+
+ return copy_result_to_user(res.return_code, rc);
+}
+
+int ioctl_get_device_mode(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkdevmode devm = {};
+ u32 device_mode = 0;
+ int rc = 0;
+
+ if (copy_from_user(&devm, (void __user *)arg,
+ sizeof(struct xlinkdevmode)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)devm.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ rc = xlink_get_device_mode(&devh, &device_mode);
+ if (!rc) {
+ if (copy_to_user((void __user *)devm.device_mode, (void *)&device_mode,
+ sizeof(device_mode)))
+ return -EFAULT;
+ }
+
+ return copy_result_to_user(devm.return_code, rc);
+}
+
+int ioctl_set_device_mode(unsigned long arg)
+{
+ struct xlink_handle devh = {};
+ struct xlinkdevmode devm = {};
+ u32 device_mode = 0;
+ int rc = 0;
+
+ if (copy_from_user(&devm, (void __user *)arg,
+ sizeof(struct xlinkdevmode)))
+ return -EFAULT;
+ if (copy_from_user(&devh, (void __user *)devm.handle,
+ sizeof(struct xlink_handle)))
+ return -EFAULT;
+ if (copy_from_user(&device_mode, (void __user *)devm.device_mode,
+ sizeof(device_mode)))
+ return -EFAULT;
+ rc = xlink_set_device_mode(&devh, device_mode);
+
+ return copy_result_to_user(devm.return_code, rc);
+}
diff --git a/drivers/misc/xlink-core/xlink-ioctl.h b/drivers/misc/xlink-core/xlink-ioctl.h
index 0f317c6c2b94..d016d8418f30 100644
--- a/drivers/misc/xlink-core/xlink-ioctl.h
+++ b/drivers/misc/xlink-core/xlink-ioctl.h
@@ -12,10 +12,19 @@
int ioctl_connect(unsigned long arg);
int ioctl_open_channel(unsigned long arg);
int ioctl_read_data(unsigned long arg);
+int ioctl_read_to_buffer(unsigned long arg);
int ioctl_write_data(unsigned long arg);
int ioctl_write_volatile_data(unsigned long arg);
int ioctl_release_data(unsigned long arg);
int ioctl_close_channel(unsigned long arg);
+int ioctl_start_vpu(unsigned long arg);
int ioctl_disconnect(unsigned long arg);
+int ioctl_get_device_name(unsigned long arg);
+int ioctl_get_device_list(unsigned long arg);
+int ioctl_get_device_status(unsigned long arg);
+int ioctl_boot_device(unsigned long arg);
+int ioctl_reset_device(unsigned long arg);
+int ioctl_get_device_mode(unsigned long arg);
+int ioctl_set_device_mode(unsigned long arg);

#endif /* XLINK_IOCTL_H_ */
diff --git a/drivers/misc/xlink-core/xlink-multiplexer.c b/drivers/misc/xlink-core/xlink-multiplexer.c
index 339734826f3e..48451dc30712 100644
--- a/drivers/misc/xlink-core/xlink-multiplexer.c
+++ b/drivers/misc/xlink-core/xlink-multiplexer.c
@@ -491,6 +491,7 @@ enum xlink_error xlink_multiplexer_tx(struct xlink_event *event,
switch (event->header.type) {
case XLINK_WRITE_REQ:
case XLINK_WRITE_VOLATILE_REQ:
+ case XLINK_WRITE_CONTROL_REQ:
opchan = get_channel(link_id, chan);
if (!opchan || opchan->chan->status != CHAN_OPEN) {
rc = X_LINK_COMMUNICATION_FAIL;
@@ -657,6 +658,7 @@ enum xlink_error xlink_multiplexer_tx(struct xlink_event *event,
break;
case XLINK_WRITE_RESP:
case XLINK_WRITE_VOLATILE_RESP:
+ case XLINK_WRITE_CONTROL_RESP:
case XLINK_READ_RESP:
case XLINK_READ_TO_BUFFER_RESP:
case XLINK_RELEASE_RESP:
@@ -759,6 +761,46 @@ enum xlink_error xlink_multiplexer_rx(struct xlink_event *event)
}
release_channel(opchan);
break;
+ case XLINK_WRITE_CONTROL_REQ:
+ opchan = get_channel(link_id, chan);
+ if (!opchan) {
+ rc = X_LINK_COMMUNICATION_FAIL;
+ } else {
+ event->header.timeout = opchan->chan->timeout;
+ buffer = xlink_platform_allocate(xmux->dev, &paddr,
+ event->header.size,
+ XLINK_PACKET_ALIGNMENT,
+ XLINK_NORMAL_MEMORY);
+ if (buffer) {
+ size = event->header.size;
+ memcpy(buffer, event->header.control_data, size);
+ event->paddr = paddr;
+ event->data = buffer;
+ if (add_packet_to_channel(opchan,
+ &opchan->rx_queue,
+ event->data,
+ event->header.size,
+ paddr)) {
+ xlink_platform_deallocate(xmux->dev,
+ buffer, paddr,
+ event->header.size,
+ XLINK_PACKET_ALIGNMENT,
+ XLINK_NORMAL_MEMORY);
+ rc = X_LINK_ERROR;
+ release_channel(opchan);
+ break;
+ }
+ event->header.type = XLINK_WRITE_CONTROL_RESP;
+ xlink_dispatcher_event_add(EVENT_RX, event);
+ // channel blocking, notify waiting threads of available packet
+ complete(&opchan->pkt_available);
+ } else {
+ // failed to allocate buffer
+ rc = X_LINK_ERROR;
+ }
+ }
+ release_channel(opchan);
+ break;
case XLINK_READ_REQ:
case XLINK_READ_TO_BUFFER_REQ:
opchan = get_channel(link_id, chan);
@@ -848,6 +890,7 @@ enum xlink_error xlink_multiplexer_rx(struct xlink_event *event)
break;
case XLINK_WRITE_RESP:
case XLINK_WRITE_VOLATILE_RESP:
+ case XLINK_WRITE_CONTROL_RESP:
opchan = get_channel(link_id, chan);
if (!opchan)
rc = X_LINK_COMMUNICATION_FAIL;
@@ -929,6 +972,18 @@ enum xlink_error xlink_passthrough(struct xlink_event *event)
rc = X_LINK_ERROR;
}
break;
+ case XLINK_WRITE_CONTROL_REQ:
+ if (xmux->channels[link_id][chan].ipc_status == CHAN_OPEN) {
+ ipc.is_volatile = 1;
+ rc = xlink_platform_write(IPC_INTERFACE,
+ event->handle->sw_device_id,
+ event->header.control_data,
+ &event->header.size, 0, &ipc);
+ } else {
+ /* channel not open */
+ rc = X_LINK_ERROR;
+ }
+ break;
case XLINK_READ_REQ:
if (xmux->channels[link_id][chan].ipc_status == CHAN_OPEN) {
/* if channel has receive blocking set,
@@ -1013,6 +1068,7 @@ enum xlink_error xlink_passthrough(struct xlink_event *event)
case XLINK_PING_REQ:
case XLINK_WRITE_RESP:
case XLINK_WRITE_VOLATILE_RESP:
+ case XLINK_WRITE_CONTROL_RESP:
case XLINK_READ_RESP:
case XLINK_READ_TO_BUFFER_RESP:
case XLINK_RELEASE_RESP:
diff --git a/drivers/misc/xlink-core/xlink-platform.c b/drivers/misc/xlink-core/xlink-platform.c
index c34b69ee206b..56eb8da28a5f 100644
--- a/drivers/misc/xlink-core/xlink-platform.c
+++ b/drivers/misc/xlink-core/xlink-platform.c
@@ -34,6 +34,20 @@ static inline int xlink_ipc_read(u32 sw_device_id, void *data,
size_t * const size, u32 timeout, void *context)
{ return -1; }

+static inline int xlink_ipc_get_device_list(u32 *sw_device_id_list,
+ u32 *num_devices)
+{ return -1; }
+static inline int xlink_ipc_get_device_name(u32 sw_device_id,
+ char *device_name, size_t name_size)
+{ return -1; }
+static inline int xlink_ipc_get_device_status(u32 sw_device_id,
+ u32 *device_status)
+{ return -1; }
+static inline int xlink_ipc_boot_device(u32 sw_device_id,
+ const char *binary_path)
+{ return -1; }
+static inline int xlink_ipc_reset_device(u32 sw_device_id)
+{ return -1; }
static inline int xlink_ipc_open_channel(u32 sw_device_id,
u32 channel)
{ return -1; }
@@ -59,6 +73,23 @@ static int (*write_fcts[NMB_OF_INTERFACES])(u32, void *, size_t * const, u32) =
static int (*read_fcts[NMB_OF_INTERFACES])(u32, void *, size_t * const, u32) = {
NULL, xlink_pcie_read, NULL, NULL};

+static int (*reset_fcts[NMB_OF_INTERFACES])(u32) = {
+ xlink_ipc_reset_device, xlink_pcie_reset_device, NULL, NULL};
+static int (*boot_fcts[NMB_OF_INTERFACES])(u32, const char *) = {
+ xlink_ipc_boot_device, xlink_pcie_boot_device, NULL, NULL};
+static int (*dev_name_fcts[NMB_OF_INTERFACES])(u32, char *, size_t) = {
+ xlink_ipc_get_device_name, xlink_pcie_get_device_name,
+ NULL, NULL};
+static int (*dev_list_fcts[NMB_OF_INTERFACES])(u32 *, u32 *) = {
+ xlink_ipc_get_device_list, xlink_pcie_get_device_list,
+ NULL, NULL};
+static int (*dev_status_fcts[NMB_OF_INTERFACES])(u32, u32 *) = {
+ xlink_ipc_get_device_status, xlink_pcie_get_device_status,
+ NULL, NULL};
+static int (*dev_set_mode_fcts[NMB_OF_INTERFACES])(u32, u32) = {
+ NULL, NULL, NULL, NULL};
+static int (*dev_get_mode_fcts[NMB_OF_INTERFACES])(u32, u32 *) = {
+ NULL, NULL, NULL, NULL};
static int (*open_chan_fcts[NMB_OF_INTERFACES])(u32, u32) = {
xlink_ipc_open_channel, NULL, NULL, NULL};

@@ -103,6 +134,61 @@ int xlink_platform_read(u32 interface, u32 sw_device_id, void *data,
return read_fcts[interface](sw_device_id, data, size, timeout);
}

+int xlink_platform_reset_device(u32 interface, u32 sw_device_id)
+{
+ if (interface >= NMB_OF_INTERFACES || !reset_fcts[interface])
+ return -1;
+ return reset_fcts[interface](sw_device_id);
+}
+
+int xlink_platform_boot_device(u32 interface, u32 sw_device_id,
+ const char *binary_name)
+{
+ if (interface >= NMB_OF_INTERFACES || !boot_fcts[interface])
+ return -1;
+ return boot_fcts[interface](sw_device_id, binary_name);
+}
+
+int xlink_platform_get_device_name(u32 interface, u32 sw_device_id,
+ char *device_name, size_t name_size)
+{
+ if (interface >= NMB_OF_INTERFACES || !dev_name_fcts[interface])
+ return -1;
+ return dev_name_fcts[interface](sw_device_id, device_name, name_size);
+}
+
+int xlink_platform_get_device_list(u32 interface,
+ u32 *sw_device_id_list, u32 *num_devices)
+{
+ if (interface >= NMB_OF_INTERFACES || !dev_list_fcts[interface])
+ return -1;
+ return dev_list_fcts[interface](sw_device_id_list, num_devices);
+}
+
+int xlink_platform_get_device_status(u32 interface, u32 sw_device_id,
+ u32 *device_status)
+{
+ if (interface >= NMB_OF_INTERFACES || !dev_status_fcts[interface])
+ return -1;
+ return dev_status_fcts[interface](sw_device_id, device_status);
+}
+
+int xlink_platform_set_device_mode(u32 interface, u32 sw_device_id,
+ u32 power_mode)
+{
+ if (interface >= NMB_OF_INTERFACES || !dev_set_mode_fcts[interface])
+ return -1;
+ return dev_set_mode_fcts[interface](sw_device_id, power_mode);
+}
+
+int xlink_platform_get_device_mode(u32 interface, u32 sw_device_id,
+ u32 *power_mode)
+{
+ if (interface >= NMB_OF_INTERFACES || !dev_get_mode_fcts[interface])
+ return -1;
+ return dev_get_mode_fcts[interface](sw_device_id, power_mode);
+}
+
int xlink_platform_open_channel(u32 interface, u32 sw_device_id,
u32 channel)
{
diff --git a/include/linux/xlink.h b/include/linux/xlink.h
index c22439d5aade..b00dbc719530 100644
--- a/include/linux/xlink.h
+++ b/include/linux/xlink.h
@@ -78,6 +78,10 @@ enum xlink_error xlink_write_data(struct xlink_handle *handle,
enum xlink_error xlink_write_volatile(struct xlink_handle *handle,
u16 chan, u8 const *message, u32 size);

+enum xlink_error xlink_write_control_data(struct xlink_handle *handle,
+ u16 chan, u8 const *message,
+ u32 size);
+
enum xlink_error xlink_read_data(struct xlink_handle *handle,
u16 chan, u8 **message, u32 *size);

@@ -90,6 +94,29 @@ enum xlink_error xlink_release_data(struct xlink_handle *handle,

enum xlink_error xlink_disconnect(struct xlink_handle *handle);

+enum xlink_error xlink_get_device_list(u32 *sw_device_id_list, u32 *num_devices);
+
+enum xlink_error xlink_get_device_name(struct xlink_handle *handle, char *name,
+ size_t name_size);
+
+enum xlink_error xlink_get_device_status(struct xlink_handle *handle,
+ u32 *device_status);
+
+enum xlink_error xlink_boot_device(struct xlink_handle *handle,
+ const char *binary_name);
+
+enum xlink_error xlink_reset_device(struct xlink_handle *handle);
+
+enum xlink_error xlink_set_device_mode(struct xlink_handle *handle,
+ enum xlink_device_power_mode power_mode);
+
+enum xlink_error xlink_get_device_mode(struct xlink_handle *handle,
+ enum xlink_device_power_mode *power_mode);
+
+enum xlink_error xlink_start_vpu(char *filename); /* depreciated */
+
+enum xlink_error xlink_stop_vpu(void); /* depreciated */
+
/* API functions to be implemented
*
* enum xlink_error xlink_write_crc_data(struct xlink_handle *handle,
--
2.17.1