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HID: intel-ish-hid: Hide members of struct ishtp_cl_device 

ISH clients don't need to access any field of struct ishtp_cl_device. To
avoid this create an interface functions instead where it is required.
In the case of ishtp_cl_allocate(), modify the parameters so that the
clients don't have to dereference.
Clients can also use tracing, here a new interface is added to get the
common trace function pointer, instead of direct call.
The new interface functions defined in one external header file, named
intel-ish-client-if.h. This is the only header files all ISHTP clients
must include.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Srinivas Pandruvada 2019-03-18 12:14:20 -07:00 committed by Jiri Kosina
parent 6b3f75f75f
commit 7ab2184246
7 changed files with 84 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/hid/intel-ish-hid/ishtp-hid-client.c
View File

@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/hid.h>
#include <linux/intel-ish-client-if.h>
#include <linux/sched.h>
#include "ishtp/ishtp-dev.h"
#include "ishtp/client.h"
@ -24,6 +25,8 @@
#define HID_CL_RX_RING_SIZE 32
#define HID_CL_TX_RING_SIZE 16
#define cl_data_to_dev(client_data) ishtp_device(client_data->cl_device)
/**
* report_bad_packets() - Report bad packets
* @hid_ishtp_cl: Client instance to get stats
@ -39,7 +42,7 @@ static void report_bad_packet(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
struct hostif_msg *recv_msg = recv_buf;
struct ishtp_cl_data *client_data = hid_ishtp_cl->client_data;
dev_err(&client_data->cl_device->dev, "[hid-ish]: BAD packet %02X\n"
dev_err(cl_data_to_dev(client_data), "[hid-ish]: BAD packet %02X\n"
"total_bad=%u cur_pos=%u\n"
"[%02X %02X %02X %02X]\n"
"payload_len=%u\n"
@ -85,7 +88,7 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
do {
if (cur_pos + sizeof(struct hostif_msg) > total_len) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: error, received %u which is less than data header %u\n",
(unsigned int)data_len,
(unsigned int)sizeof(struct hostif_msg_hdr));
@ -124,12 +127,12 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
client_data->hid_dev_count = (unsigned int)*payload;
if (!client_data->hid_devices)
client_data->hid_devices = devm_kcalloc(
&client_data->cl_device->dev,
cl_data_to_dev(client_data),
client_data->hid_dev_count,
sizeof(struct device_info),
GFP_KERNEL);
if (!client_data->hid_devices) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"Mem alloc failed for hid device info\n");
wake_up_interruptible(&client_data->init_wait);
break;
@ -137,7 +140,7 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
for (i = 0; i < client_data->hid_dev_count; ++i) {
if (1 + sizeof(struct device_info) * i >=
payload_len) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: [ENUM_DEVICES]: content size %zu is bigger than payload_len %zu\n",
1 + sizeof(struct device_info)
* i, payload_len);
@ -172,7 +175,7 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
}
if (!client_data->hid_descr[curr_hid_dev])
client_data->hid_descr[curr_hid_dev] =
devm_kmalloc(&client_data->cl_device->dev,
devm_kmalloc(cl_data_to_dev(client_data),
payload_len, GFP_KERNEL);
if (client_data->hid_descr[curr_hid_dev]) {
memcpy(client_data->hid_descr[curr_hid_dev],
@ -197,7 +200,7 @@ static void process_recv(struct ishtp_cl *hid_ishtp_cl, void *recv_buf,
}
if (!client_data->report_descr[curr_hid_dev])
client_data->report_descr[curr_hid_dev] =
devm_kmalloc(&client_data->cl_device->dev,
devm_kmalloc(cl_data_to_dev(client_data),
payload_len, GFP_KERNEL);
if (client_data->report_descr[curr_hid_dev]) {
memcpy(client_data->report_descr[curr_hid_dev],
@ -516,12 +519,12 @@ static int ishtp_enum_enum_devices(struct ishtp_cl *hid_ishtp_cl)
sizeof(struct hostif_msg));
}
if (!client_data->enum_devices_done) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: timed out waiting for enum_devices\n");
return -ETIMEDOUT;
}
if (!client_data->hid_devices) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: failed to allocate HID dev structures\n");
return -ENOMEM;
}
@ -564,13 +567,13 @@ static int ishtp_get_hid_descriptor(struct ishtp_cl *hid_ishtp_cl, int index)
client_data->hid_descr_done,
3 * HZ);
if (!client_data->hid_descr_done) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: timed out for hid_descr_done\n");
return -EIO;
}
if (!client_data->hid_descr[index]) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: allocation HID desc fail\n");
return -ENOMEM;
}
@ -611,12 +614,12 @@ static int ishtp_get_report_descriptor(struct ishtp_cl *hid_ishtp_cl,
client_data->report_descr_done,
3 * HZ);
if (!client_data->report_descr_done) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: timed out for report descr\n");
return -EIO;
}
if (!client_data->report_descr[index]) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: failed to alloc report descr\n");
return -ENOMEM;
}
@ -646,12 +649,12 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
int i;
int rv;
dev_dbg(&client_data->cl_device->dev, "%s\n", __func__);
dev_dbg(cl_data_to_dev(client_data), "%s\n", __func__);
hid_ishtp_trace(client_data, "%s reset flag: %d\n", __func__, reset);
rv = ishtp_cl_link(hid_ishtp_cl, ISHTP_HOST_CLIENT_ID_ANY);
if (rv) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"ishtp_cl_link failed\n");
return -ENOMEM;
}
@ -666,7 +669,7 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
fw_client = ishtp_fw_cl_get_client(dev, &hid_ishtp_guid);
if (!fw_client) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"ish client uuid not found\n");
return -ENOENT;
}
@ -676,7 +679,7 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
rv = ishtp_cl_connect(hid_ishtp_cl);
if (rv) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"client connect fail\n");
goto err_cl_unlink;
}
@ -707,7 +710,7 @@ static int hid_ishtp_cl_init(struct ishtp_cl *hid_ishtp_cl, int reset)
if (!reset) {
rv = ishtp_hid_probe(i, client_data);
if (rv) {
dev_err(&client_data->cl_device->dev,
dev_err(cl_data_to_dev(client_data),
"[hid-ish]: HID probe for #%u failed: %d\n",
i, rv);
goto err_cl_disconnect;
@ -763,7 +766,7 @@ static void hid_ishtp_cl_reset_handler(struct work_struct *work)
hid_ishtp_cl_deinit(hid_ishtp_cl);
hid_ishtp_cl = ishtp_cl_allocate(cl_device->ishtp_dev);
hid_ishtp_cl = ishtp_cl_allocate(cl_device);
if (!hid_ishtp_cl)
return;
@ -777,15 +780,17 @@ static void hid_ishtp_cl_reset_handler(struct work_struct *work)
rv = hid_ishtp_cl_init(hid_ishtp_cl, 1);
if (!rv)
break;
dev_err(&client_data->cl_device->dev, "Retry reset init\n");
dev_err(cl_data_to_dev(client_data), "Retry reset init\n");
}
if (rv) {
dev_err(&client_data->cl_device->dev, "Reset Failed\n");
dev_err(cl_data_to_dev(client_data), "Reset Failed\n");
hid_ishtp_trace(client_data, "%s Failed hid_ishtp_cl %p\n",
__func__, hid_ishtp_cl);
}
}
void (*hid_print_trace)(void *dev, const char *format, ...);
/**
* hid_ishtp_cl_probe() - ISHTP client driver probe
* @cl_device: ISHTP client device instance
@ -803,12 +808,13 @@ static int hid_ishtp_cl_probe(struct ishtp_cl_device *cl_device)
if (!cl_device)
return -ENODEV;
client_data = devm_kzalloc(&cl_device->dev, sizeof(*client_data),
client_data = devm_kzalloc(ishtp_device(cl_device),
sizeof(*client_data),
GFP_KERNEL);
if (!client_data)
return -ENOMEM;
hid_ishtp_cl = ishtp_cl_allocate(cl_device->ishtp_dev);
hid_ishtp_cl = ishtp_cl_allocate(cl_device);
if (!hid_ishtp_cl)
return -ENOMEM;
@ -822,6 +828,8 @@ 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);
rv = hid_ishtp_cl_init(hid_ishtp_cl, 0);
if (rv) {
ishtp_cl_free(hid_ishtp_cl);
@ -848,7 +856,7 @@ static int hid_ishtp_cl_remove(struct ishtp_cl_device *cl_device)
hid_ishtp_trace(client_data, "%s hid_ishtp_cl %p\n", __func__,
hid_ishtp_cl);
dev_dbg(&cl_device->dev, "%s\n", __func__);
dev_dbg(ishtp_device(cl_device), "%s\n", __func__);
hid_ishtp_cl->state = ISHTP_CL_DISCONNECTING;
ishtp_cl_disconnect(hid_ishtp_cl);
ishtp_put_device(cl_device);

4
drivers/hid/intel-ish-hid/ishtp-hid.c
View File

@ -14,6 +14,7 @@
*/
#include <linux/hid.h>
#include <linux/intel-ish-client-if.h>
#include <uapi/linux/input.h>
#include "ishtp/client.h"
#include "ishtp-hid.h"
@ -241,7 +242,8 @@ int ishtp_hid_probe(unsigned int cur_hid_dev,
hid->ll_driver = &ishtp_hid_ll_driver;
hid->bus = BUS_INTEL_ISHTP;
hid->dev.parent = &client_data->cl_device->dev;
hid->dev.parent = ishtp_device(client_data->cl_device);
hid->version = le16_to_cpu(ISH_HID_VERSION);
hid->vendor = le16_to_cpu(client_data->hid_devices[cur_hid_dev].vid);
hid->product = le16_to_cpu(client_data->hid_devices[cur_hid_dev].pid);

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

@ -24,7 +24,7 @@
#define IS_RESPONSE 0x80
/* Used to dump to Linux trace buffer, if enabled */
#define hid_ishtp_trace(client, ...) \
#define hid_ishtp_trace(client, ...) \
client->cl_device->ishtp_dev->print_log(\
client->cl_device->ishtp_dev, __VA_ARGS__)

27
drivers/hid/intel-ish-hid/ishtp/bus.c
View File

@ -827,6 +827,33 @@ int ishtp_use_dma_transfer(void)
return ishtp_use_dma;
}
/**
* ishtp_device() - Return device pointer
*
* This interface is used to return device pointer from ishtp_cl_device
* instance.
*
* Return: device *.
*/
struct device *ishtp_device(struct ishtp_cl_device *device)
{
return &device->dev;
}
EXPORT_SYMBOL(ishtp_device);
/**
* ishtp_trace_callback() - Return trace callback
*
* This interface is used to return trace callback function pointer.
*
* Return: void *.
*/
void *ishtp_trace_callback(struct ishtp_cl_device *cl_device)
{
return cl_device->ishtp_dev->print_log;
}
EXPORT_SYMBOL(ishtp_trace_callback);
/**
* ishtp_bus_register() - Function to register bus
*

4
drivers/hid/intel-ish-hid/ishtp/client.c
View File

@ -126,7 +126,7 @@ static void ishtp_cl_init(struct ishtp_cl *cl, struct ishtp_device *dev)
*
* Return: The allocated client instance or NULL on failure
*/
struct ishtp_cl *ishtp_cl_allocate(struct ishtp_device *dev)
struct ishtp_cl *ishtp_cl_allocate(struct ishtp_cl_device *cl_device)
{
struct ishtp_cl *cl;
@ -134,7 +134,7 @@ struct ishtp_cl *ishtp_cl_allocate(struct ishtp_device *dev)
if (!cl)
return NULL;
ishtp_cl_init(cl, dev);
ishtp_cl_init(cl, cl_device->ishtp_dev);
return cl;
}
EXPORT_SYMBOL(ishtp_cl_allocate);

2
drivers/hid/intel-ish-hid/ishtp/client.h
View File

@ -170,7 +170,7 @@ static inline bool ishtp_cl_cmp_id(const struct ishtp_cl *cl1,
}
/* exported functions from ISHTP under client management scope */
struct ishtp_cl *ishtp_cl_allocate(struct ishtp_device *dev);
struct ishtp_cl *ishtp_cl_allocate(struct ishtp_cl_device *cl_device);
void ishtp_cl_free(struct ishtp_cl *cl);
int ishtp_cl_link(struct ishtp_cl *cl, int id);
void ishtp_cl_unlink(struct ishtp_cl *cl);

18
include/linux/intel-ish-client-if.h Normal file
View File

@ -0,0 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Intel ISH client Interface definitions
*
* Copyright (c) 2019, Intel Corporation.
*/
#ifndef _INTEL_ISH_CLIENT_IF_H_
#define _INTEL_ISH_CLIENT_IF_H_
struct ishtp_cl_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);
#endif /* _INTEL_ISH_CLIENT_IF_H_ */