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Merge branch 'for-5.14/intel-ish' into for-linus

Browse Source 
- support for ISH DMA on EHL platform from Even Xu
- various code style fixes and cleanups from Lee Jones and Uwe Kleine-König
This commit is contained in:
Jiri Kosina 2021-06-30 09:06:53 +02:00
commit 33197bd3e8
14 changed files with 113 additions and 71 deletions
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1
drivers/hid/intel-ish-hid/Kconfig
View File

@ -5,6 +5,7 @@ menu "Intel ISH HID support"
config INTEL_ISH_HID
tristate "Intel Integrated Sensor Hub"
default n
depends on X86
select HID
help
The Integrated Sensor Hub (ISH) enables the ability to offload

28
drivers/hid/intel-ish-hid/ipc/ipc.c
View File

@ -544,7 +544,7 @@ static int ish_fw_reset_handler(struct ishtp_device *dev)
#define TIMEOUT_FOR_HW_RDY_MS 300
/**
* ish_fw_reset_work_fn() - FW reset worker function
* fw_reset_work_fn() - FW reset worker function
* @unused: not used
*
* Call ish_fw_reset_handler to complete FW reset
@ -889,6 +889,29 @@ static uint32_t ish_ipc_get_header(struct ishtp_device *dev, int length,
return drbl_val;
}
/**
* _dma_no_cache_snooping()
*
* Check on current platform, DMA supports cache snooping or not.
* This callback is used to notify uplayer driver if manully cache
* flush is needed when do DMA operation.
*
* Please pay attention to this callback implementation, if declare
* having cache snooping on a cache snooping not supported platform
* will cause uplayer driver receiving mismatched data; and if
* declare no cache snooping on a cache snooping supported platform
* will cause cache be flushed twice and performance hit.
*
* @dev: ishtp device pointer
*
* Return: false - has cache snooping capability
* true - no cache snooping, need manually cache flush
*/
static bool _dma_no_cache_snooping(struct ishtp_device *dev)
{
return dev->pdev->device == EHL_Ax_DEVICE_ID;
}
static const struct ishtp_hw_ops ish_hw_ops = {
.hw_reset = _ish_hw_reset,
.ipc_reset = _ish_ipc_reset,
@ -897,7 +920,8 @@ static const struct ishtp_hw_ops ish_hw_ops = {
.write = write_ipc_to_queue,
.get_fw_status = _ish_read_fw_sts_reg,
.sync_fw_clock = _ish_sync_fw_clock,
.ishtp_read_hdr = _ishtp_read_hdr
.ishtp_read_hdr = _ishtp_read_hdr,
.dma_no_cache_snooping = _dma_no_cache_snooping
};
/**

3
drivers/hid/intel-ish-hid/ipc/pci-ish.c
View File

@ -263,7 +263,6 @@ static void __maybe_unused ish_resume_handler(struct work_struct *work)
struct pci_dev *pdev = to_pci_dev(ish_resume_device);
struct ishtp_device *dev = pci_get_drvdata(pdev);
uint32_t fwsts = dev->ops->get_fw_status(dev);
int ret;
if (ish_should_leave_d0i3(pdev) && !dev->suspend_flag
&& IPC_IS_ISH_ILUP(fwsts)) {
@ -275,7 +274,7 @@ static void __maybe_unused ish_resume_handler(struct work_struct *work)
/* Waiting to get resume response */
if (dev->resume_flag)
ret = wait_event_interruptible_timeout(dev->resume_wait,
wait_event_interruptible_timeout(dev->resume_wait,
!dev->resume_flag,
msecs_to_jiffies(WAIT_FOR_RESUME_ACK_MS));

49
drivers/hid/intel-ish-hid/ishtp-fw-loader.c
View File

@ -31,13 +31,13 @@
/**
* enum ish_loader_commands - ISH loader host commands.
* LOADER_CMD_XFER_QUERY Query the Shim firmware loader for
* @LOADER_CMD_XFER_QUERY: Query the Shim firmware loader for
* capabilities
* LOADER_CMD_XFER_FRAGMENT Transfer one firmware image fragment at a
* @LOADER_CMD_XFER_FRAGMENT: Transfer one firmware image fragment at a
* time. The command may be executed
* multiple times until the entire firmware
* image is downloaded to SRAM.
* LOADER_CMD_START Start executing the main firmware.
* @LOADER_CMD_START: Start executing the main firmware.
*/
enum ish_loader_commands {
LOADER_CMD_XFER_QUERY = 0,
@ -95,6 +95,7 @@ static int dma_buf_size_limit = 4 * PAGE_SIZE;
/**
* struct loader_msg_hdr - Header for ISH Loader commands.
* @command: LOADER_CMD* commands. Bit 7 is the response.
* @reserved: Reserved space
* @status: Command response status. Non 0, is error
* condition.
*
@ -173,16 +174,16 @@ struct loader_start {
* struct response_info - Encapsulate firmware response related
* information for passing between function
* loader_cl_send() and process_recv() callback.
* @data Copy the data received from firmware here.
* @max_size Max size allocated for the @data buffer. If the
* @data: Copy the data received from firmware here.
* @max_size: Max size allocated for the @data buffer. If the
* received data exceeds this value, we log an
* error.
* @size Actual size of data received from firmware.
* @error Returns 0 for success, negative error code for a
* @size: Actual size of data received from firmware.
* @error: Returns 0 for success, negative error code for a
* failure in function process_recv().
* @received Set to true on receiving a valid firmware
* @received: Set to true on receiving a valid firmware
* response to host command
* @wait_queue Wait queue for Host firmware loading where the
* @wait_queue: Wait queue for Host firmware loading where the
* client sends message to ISH firmware and waits
* for response
*/
@ -195,13 +196,13 @@ struct response_info {
wait_queue_head_t wait_queue;
};
/**
/*
* struct ishtp_cl_data - Encapsulate per ISH-TP Client Data.
* @work_ishtp_reset: Work queue for reset handling.
* @work_fw_load: Work queue for host firmware loading.
* @flag_retry Flag for indicating host firmware loading should
* @flag_retry: Flag for indicating host firmware loading should
* be retried.
* @retry_count Count the number of retries.
* @retry_count: Count the number of retries.
*
* This structure is used to store data per client.
*/
@ -240,8 +241,8 @@ struct ishtp_cl_data {
/**
* get_firmware_variant() - Gets the filename of firmware image to be
* loaded based on platform variant.
* @client_data Client data instance.
* @filename Returns firmware filename.
* @client_data: Client data instance.
* @filename: Returns firmware filename.
*
* Queries the firmware-name device property string.
*
@ -266,11 +267,11 @@ static int get_firmware_variant(struct ishtp_cl_data *client_data,
/**
* loader_cl_send() Send message from host to firmware
* @client_data: Client data instance
* @out_msg Message buffer to be sent to firmware
* @out_size Size of out going message
* @in_msg Message buffer where the incoming data copied.
* @out_msg: Message buffer to be sent to firmware
* @out_size: Size of out going message
* @in_msg: Message buffer where the incoming data copied.
* This buffer is allocated by calling
* @in_size Max size of incoming message
* @in_size: Max size of incoming message
*
* Return: Number of bytes copied in the in_msg on success, negative
* error code on failure.
@ -435,7 +436,7 @@ end:
/**
* loader_cl_event_cb() - bus driver callback for incoming message
* @device: Pointer to the ishtp client device for which this
* @cl_device: Pointer to the ishtp client device for which this
* message is targeted
*
* Remove the packet from the list and process the message by calling
@ -536,7 +537,7 @@ static int ish_query_loader_prop(struct ishtp_cl_data *client_data,
}
/**
* ish_fw_xfer_ishtp() Loads ISH firmware using ishtp interface
* ish_fw_xfer_ishtp() - Loads ISH firmware using ishtp interface
* @client_data: Client data instance
* @fw: Pointer to firmware data struct in host memory
*
@ -733,7 +734,7 @@ end_err_dma_buf_release:
}
/**
* ish_fw_start() Start executing ISH main firmware
* ish_fw_start() - Start executing ISH main firmware
* @client_data: client data instance
*
* This function sends message to Shim firmware loader to start
@ -756,7 +757,7 @@ static int ish_fw_start(struct ishtp_cl_data *client_data)
}
/**
* load_fw_from_host() Loads ISH firmware from host
* load_fw_from_host() - Loads ISH firmware from host
* @client_data: Client data instance
*
* This function loads the ISH firmware to ISH SRAM and starts execution
@ -1015,7 +1016,7 @@ static int loader_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
*
* Return: 0
*/
static int loader_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
static void loader_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
{
struct ishtp_cl_data *client_data;
struct ishtp_cl *loader_ishtp_cl = ishtp_get_drvdata(cl_device);
@ -1032,8 +1033,6 @@ static int loader_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
cancel_work_sync(&client_data->work_ishtp_reset);
loader_deinit(loader_ishtp_cl);
ishtp_put_device(cl_device);
return 0;
}
/**

15
drivers/hid/intel-ish-hid/ishtp-hid-client.c
View File

@ -11,6 +11,11 @@
#include <linux/sched.h>
#include "ishtp-hid.h"
/* ISH Transport protocol (ISHTP in short) GUID */
static const guid_t hid_ishtp_guid =
GUID_INIT(0x33AECD58, 0xB679, 0x4E54,
0x9B, 0xD9, 0xA0, 0x4D, 0x34, 0xF0, 0xC2, 0x26);
/* Rx ring buffer pool size */
#define HID_CL_RX_RING_SIZE 32
#define HID_CL_TX_RING_SIZE 16
@ -18,7 +23,7 @@
#define cl_data_to_dev(client_data) ishtp_device(client_data->cl_device)
/**
* report_bad_packets() - Report bad packets
* report_bad_packet() - Report bad packets
* @hid_ishtp_cl: Client instance to get stats
* @recv_buf: Raw received host interface message
* @cur_pos: Current position index in payload
@ -779,7 +784,7 @@ static void hid_ishtp_cl_reset_handler(struct work_struct *work)
}
}
void (*hid_print_trace)(void *unused, const char *format, ...);
ishtp_print_log ishtp_hid_print_trace;
/**
* hid_ishtp_cl_probe() - ISHTP client driver probe
@ -818,7 +823,7 @@ static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
INIT_WORK(&client_data->work, hid_ishtp_cl_reset_handler);
hid_print_trace = ishtp_trace_callback(cl_device);
ishtp_hid_print_trace = ishtp_trace_callback(cl_device);
rv = hid_ishtp_cl_init(hid_ishtp_cl, 0);
if (rv) {
@ -838,7 +843,7 @@ static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
*
* Return: 0
*/
static int hid_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
static void hid_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
{
struct ishtp_cl *hid_ishtp_cl = ishtp_get_drvdata(cl_device);
struct ishtp_cl_data *client_data = ishtp_get_client_data(hid_ishtp_cl);
@ -856,8 +861,6 @@ static int hid_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
hid_ishtp_cl = NULL;
client_data->num_hid_devices = 0;
return 0;
}
/**

2
drivers/hid/intel-ish-hid/ishtp-hid.c
View File

@ -254,7 +254,7 @@ err_hid_data:
}
/**
* ishtp_hid_probe() - Remove registered hid device
* ishtp_hid_remove() - Remove registered hid device
* @client_data: client data pointer
*
* This function is used to destroy allocatd HID device.

9
drivers/hid/intel-ish-hid/ishtp-hid.h
View File

@ -16,14 +16,9 @@
#define IS_RESPONSE 0x80
/* Used to dump to Linux trace buffer, if enabled */
extern void (*hid_print_trace)(void *unused, const char *format, ...);
extern ishtp_print_log ishtp_hid_print_trace;
#define hid_ishtp_trace(client, ...) \
(hid_print_trace)(NULL, __VA_ARGS__)
/* ISH Transport protocol (ISHTP in short) GUID */
static const guid_t hid_ishtp_guid =
GUID_INIT(0x33AECD58, 0xB679, 0x4E54,
0x9B, 0xD9, 0xA0, 0x4D, 0x34, 0xF0, 0xC2, 0x26);
(ishtp_hid_print_trace)(NULL, __VA_ARGS__)
/* ISH HID message structure */
struct hostif_msg_hdr {

24
drivers/hid/intel-ish-hid/ishtp/bus.c
View File

@ -164,6 +164,7 @@ EXPORT_SYMBOL(ishtp_fw_cl_get_client);
/**
* ishtp_get_fw_client_id() - Get fw client id
* @fw_client: firmware client used to fetch the ID
*
* This interface is used to reset HW get FW client id.
*
@ -257,24 +258,17 @@ static int ishtp_cl_bus_match(struct device *dev, struct device_driver *drv)
static int ishtp_cl_device_remove(struct device *dev)
{
struct ishtp_cl_device *device = to_ishtp_cl_device(dev);
struct ishtp_cl_driver *driver;
if (!device || !dev->driver)
return 0;
struct ishtp_cl_driver *driver = to_ishtp_cl_driver(dev->driver);
if (device->event_cb) {
device->event_cb = NULL;
cancel_work_sync(&device->event_work);
}
driver = to_ishtp_cl_driver(dev->driver);
if (!driver->remove) {
dev->driver = NULL;
if (driver->remove)
driver->remove(device);
return 0;
}
return driver->remove(device);
return 0;
}
/**
@ -842,6 +836,7 @@ int ishtp_use_dma_transfer(void)
/**
* ishtp_device() - Return device pointer
* @device: ISH-TP client device instance
*
* This interface is used to return device pointer from ishtp_cl_device
* instance.
@ -858,6 +853,7 @@ EXPORT_SYMBOL(ishtp_device);
* ishtp_get_pci_device() - Return PCI device dev pointer
* This interface is used to return PCI device pointer
* from ishtp_cl_device instance.
* @device: ISH-TP client device instance
*
* Return: device *.
*/
@ -869,12 +865,13 @@ EXPORT_SYMBOL(ishtp_get_pci_device);
/**
* ishtp_trace_callback() - Return trace callback
* @cl_device: ISH-TP client device instance
*
* This interface is used to return trace callback function pointer.
*
* Return: void *.
* Return: *ishtp_print_log()
*/
void *ishtp_trace_callback(struct ishtp_cl_device *cl_device)
ishtp_print_log ishtp_trace_callback(struct ishtp_cl_device *cl_device)
{
return cl_device->ishtp_dev->print_log;
}
@ -882,6 +879,7 @@ EXPORT_SYMBOL(ishtp_trace_callback);
/**
* ish_hw_reset() - Call HW reset IPC callback
* @dev: ISHTP device instance
*
* This interface is used to reset HW in case of error.
*

23
drivers/hid/intel-ish-hid/ishtp/client.c
View File

@ -10,6 +10,7 @@
#include <linux/wait.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <asm/cacheflush.h>
#include "hbm.h"
#include "client.h"
@ -111,7 +112,7 @@ static void ishtp_cl_init(struct ishtp_cl *cl, struct ishtp_device *dev)
/**
* ishtp_cl_allocate() - allocates client structure and sets it up.
* @dev: ishtp device
* @cl_device: ishtp client device
*
* Allocate memory for new client device and call to initialize each field.
*
@ -263,7 +264,6 @@ EXPORT_SYMBOL(ishtp_cl_unlink);
int ishtp_cl_disconnect(struct ishtp_cl *cl)
{
struct ishtp_device *dev;
int err;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@ -283,7 +283,7 @@ int ishtp_cl_disconnect(struct ishtp_cl *cl)
return -ENODEV;
}
err = wait_event_interruptible_timeout(cl->wait_ctrl_res,
wait_event_interruptible_timeout(cl->wait_ctrl_res,
(dev->dev_state != ISHTP_DEV_ENABLED ||
cl->state == ISHTP_CL_DISCONNECTED),
ishtp_secs_to_jiffies(ISHTP_CL_CONNECT_TIMEOUT));
@ -773,6 +773,14 @@ static void ishtp_cl_send_msg_dma(struct ishtp_device *dev,
/* write msg to dma buf */
memcpy(msg_addr, cl_msg->send_buf.data, cl_msg->send_buf.size);
/*
* if current fw don't support cache snooping, driver have to
* flush the cache manually.
*/
if (dev->ops->dma_no_cache_snooping &&
dev->ops->dma_no_cache_snooping(dev))
clflush_cache_range(msg_addr, cl_msg->send_buf.size);
/* send dma_xfer hbm msg */
off = msg_addr - (unsigned char *)dev->ishtp_host_dma_tx_buf;
ishtp_hbm_hdr(&hdr, sizeof(struct dma_xfer_hbm));
@ -997,6 +1005,15 @@ void recv_ishtp_cl_msg_dma(struct ishtp_device *dev, void *msg,
}
buffer = rb->buffer.data;
/*
* if current fw don't support cache snooping, driver have to
* flush the cache manually.
*/
if (dev->ops->dma_no_cache_snooping &&
dev->ops->dma_no_cache_snooping(dev))
clflush_cache_range(msg, hbm->msg_length);
memcpy(buffer, msg, hbm->msg_length);
rb->buf_idx = hbm->msg_length;

10
drivers/hid/intel-ish-hid/ishtp/hbm.c
View File

@ -398,7 +398,7 @@ static void ishtp_hbm_cl_connect_res(struct ishtp_device *dev,
}
/**
* ishtp_client_disconnect_request() - Receive disconnect request
* ishtp_hbm_fw_disconnect_req() - Receive disconnect request
* @dev: ISHTP device instance
* @disconnect_req: disconnect request structure
*
@ -430,7 +430,7 @@ static void ishtp_hbm_fw_disconnect_req(struct ishtp_device *dev,
}
/**
* ishtp_hbm_dma_xfer_ack(() - Receive transfer ACK
* ishtp_hbm_dma_xfer_ack() - Receive transfer ACK
* @dev: ISHTP device instance
* @dma_xfer: HBM transfer message
*
@ -914,7 +914,7 @@ static inline void fix_cl_hdr(struct ishtp_msg_hdr *hdr, size_t length,
/*** Suspend and resume notification ***/
static uint32_t current_state;
static uint32_t supported_states = 0 | SUSPEND_STATE_BIT;
static uint32_t supported_states = SUSPEND_STATE_BIT | CONNECTED_STANDBY_STATE_BIT;
/**
* ishtp_send_suspend() - Send suspend message to FW
@ -933,7 +933,7 @@ void ishtp_send_suspend(struct ishtp_device *dev)
memset(&state_status_msg, 0, len);
state_status_msg.hdr.cmd = SYSTEM_STATE_STATUS;
state_status_msg.supported_states = supported_states;
current_state |= SUSPEND_STATE_BIT;
current_state |= (SUSPEND_STATE_BIT | CONNECTED_STANDBY_STATE_BIT);
dev->print_log(dev, "%s() sends SUSPEND notification\n", __func__);
state_status_msg.states_status = current_state;
@ -959,7 +959,7 @@ void ishtp_send_resume(struct ishtp_device *dev)
memset(&state_status_msg, 0, len);
state_status_msg.hdr.cmd = SYSTEM_STATE_STATUS;
state_status_msg.supported_states = supported_states;
current_state &= ~SUSPEND_STATE_BIT;
current_state &= ~(CONNECTED_STANDBY_STATE_BIT | SUSPEND_STATE_BIT);
dev->print_log(dev, "%s() sends RESUME notification\n", __func__);
state_status_msg.states_status = current_state;

1
drivers/hid/intel-ish-hid/ishtp/hbm.h
View File

@ -235,6 +235,7 @@ struct dma_xfer_hbm {
#define SYSTEM_STATE_QUERY_SUBSCRIBERS 0x3
#define SYSTEM_STATE_STATE_CHANGE_REQ 0x4
/*indicates suspend and resume states*/
#define CONNECTED_STANDBY_STATE_BIT (1<<0)
#define SUSPEND_STATE_BIT (1<<1)
struct ish_system_states_header {

5
drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h
View File

@ -10,6 +10,7 @@
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/intel-ish-client-if.h>
#include "bus.h"
#include "hbm.h"
@ -118,6 +119,7 @@ struct ishtp_hw_ops {
unsigned long buffer_length);
uint32_t (*get_fw_status)(struct ishtp_device *dev);
void (*sync_fw_clock)(struct ishtp_device *dev);
bool (*dma_no_cache_snooping)(struct ishtp_device *dev);
};
/**
@ -202,8 +204,7 @@ struct ishtp_device {
uint64_t ishtp_host_dma_rx_buf_phys;
/* Dump to trace buffers if enabled*/
__printf(2, 3) void (*print_log)(struct ishtp_device *dev,
const char *format, ...);
ishtp_print_log print_log;
/* Debug stats */
unsigned int ipc_rx_cnt;

4
drivers/platform/chrome/cros_ec_ishtp.c
View File

@ -703,7 +703,7 @@ end_ishtp_cl_alloc_error:
*
* Return: 0
*/
static int cros_ec_ishtp_remove(struct ishtp_cl_device *cl_device)
static void cros_ec_ishtp_remove(struct ishtp_cl_device *cl_device)
{
struct ishtp_cl *cros_ish_cl = ishtp_get_drvdata(cl_device);
struct ishtp_cl_data *client_data = ishtp_get_client_data(cros_ish_cl);
@ -712,8 +712,6 @@ static int cros_ec_ishtp_remove(struct ishtp_cl_device *cl_device)
cancel_work_sync(&client_data->work_ec_evt);
cros_ish_deinit(cros_ish_cl);
ishtp_put_device(cl_device);
return 0;
}
/**

10
include/linux/intel-ish-client-if.h
View File

@ -8,11 +8,17 @@
#ifndef _INTEL_ISH_CLIENT_IF_H_
#define _INTEL_ISH_CLIENT_IF_H_
#include <linux/device.h>
#include <linux/uuid.h>
struct ishtp_cl_device;
struct ishtp_device;
struct ishtp_cl;
struct ishtp_fw_client;
typedef __printf(2, 3) void (*ishtp_print_log)(struct ishtp_device *dev,
const char *format, ...);
/* Client state */
enum cl_state {
ISHTP_CL_INITIALIZING = 0,
@ -36,7 +42,7 @@ struct ishtp_cl_driver {
const char *name;
const guid_t *guid;
int (*probe)(struct ishtp_cl_device *dev);
int (*remove)(struct ishtp_cl_device *dev);
void (*remove)(struct ishtp_cl_device *dev);
int (*reset)(struct ishtp_cl_device *dev);
const struct dev_pm_ops *pm;
};
@ -76,7 +82,7 @@ int ishtp_register_event_cb(struct ishtp_cl_device *device,
/* Get the device * from ishtp device instance */
struct device *ishtp_device(struct ishtp_cl_device *cl_device);
/* Trace interface for clients */
void *ishtp_trace_callback(struct ishtp_cl_device *cl_device);
ishtp_print_log ishtp_trace_callback(struct ishtp_cl_device *cl_device);
/* Get device pointer of PCI device for DMA acces */
struct device *ishtp_get_pci_device(struct ishtp_cl_device *cl_device);