![Cristian Sicilia](/assets/img/avatar_default.png)
Some parameters are aligned with parentheses. Some parentheses was opened at end of line. Signed-off-by: Cristian Sicilia <sicilia.cristian@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1399 lines
35 KiB
C
1399 lines
35 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* SVC Greybus driver.
|
|
*
|
|
* Copyright 2015 Google Inc.
|
|
* Copyright 2015 Linaro Ltd.
|
|
*/
|
|
|
|
#include <linux/debugfs.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include "greybus.h"
|
|
|
|
#define SVC_INTF_EJECT_TIMEOUT 9000
|
|
#define SVC_INTF_ACTIVATE_TIMEOUT 6000
|
|
#define SVC_INTF_RESUME_TIMEOUT 3000
|
|
|
|
struct gb_svc_deferred_request {
|
|
struct work_struct work;
|
|
struct gb_operation *operation;
|
|
};
|
|
|
|
static int gb_svc_queue_deferred_request(struct gb_operation *operation);
|
|
|
|
static ssize_t endo_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
|
|
return sprintf(buf, "0x%04x\n", svc->endo_id);
|
|
}
|
|
static DEVICE_ATTR_RO(endo_id);
|
|
|
|
static ssize_t ap_intf_id_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
|
|
return sprintf(buf, "%u\n", svc->ap_intf_id);
|
|
}
|
|
static DEVICE_ATTR_RO(ap_intf_id);
|
|
|
|
// FIXME
|
|
// This is a hack, we need to do this "right" and clean the interface up
|
|
// properly, not just forcibly yank the thing out of the system and hope for the
|
|
// best. But for now, people want their modules to come out without having to
|
|
// throw the thing to the ground or get out a screwdriver.
|
|
static ssize_t intf_eject_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
unsigned short intf_id;
|
|
int ret;
|
|
|
|
ret = kstrtou16(buf, 10, &intf_id);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dev_warn(dev, "Forcibly trying to eject interface %d\n", intf_id);
|
|
|
|
ret = gb_svc_intf_eject(svc, intf_id);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return len;
|
|
}
|
|
static DEVICE_ATTR_WO(intf_eject);
|
|
|
|
static ssize_t watchdog_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
|
|
return sprintf(buf, "%s\n",
|
|
gb_svc_watchdog_enabled(svc) ? "enabled" : "disabled");
|
|
}
|
|
|
|
static ssize_t watchdog_store(struct device *dev,
|
|
struct device_attribute *attr, const char *buf,
|
|
size_t len)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
int retval;
|
|
bool user_request;
|
|
|
|
retval = strtobool(buf, &user_request);
|
|
if (retval)
|
|
return retval;
|
|
|
|
if (user_request)
|
|
retval = gb_svc_watchdog_enable(svc);
|
|
else
|
|
retval = gb_svc_watchdog_disable(svc);
|
|
if (retval)
|
|
return retval;
|
|
return len;
|
|
}
|
|
static DEVICE_ATTR_RW(watchdog);
|
|
|
|
static ssize_t watchdog_action_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
|
|
if (svc->action == GB_SVC_WATCHDOG_BITE_PANIC_KERNEL)
|
|
return sprintf(buf, "panic\n");
|
|
else if (svc->action == GB_SVC_WATCHDOG_BITE_RESET_UNIPRO)
|
|
return sprintf(buf, "reset\n");
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static ssize_t watchdog_action_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
|
|
if (sysfs_streq(buf, "panic"))
|
|
svc->action = GB_SVC_WATCHDOG_BITE_PANIC_KERNEL;
|
|
else if (sysfs_streq(buf, "reset"))
|
|
svc->action = GB_SVC_WATCHDOG_BITE_RESET_UNIPRO;
|
|
else
|
|
return -EINVAL;
|
|
|
|
return len;
|
|
}
|
|
static DEVICE_ATTR_RW(watchdog_action);
|
|
|
|
static int gb_svc_pwrmon_rail_count_get(struct gb_svc *svc, u8 *value)
|
|
{
|
|
struct gb_svc_pwrmon_rail_count_get_response response;
|
|
int ret;
|
|
|
|
ret = gb_operation_sync(svc->connection,
|
|
GB_SVC_TYPE_PWRMON_RAIL_COUNT_GET, NULL, 0,
|
|
&response, sizeof(response));
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to get rail count: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
*value = response.rail_count;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gb_svc_pwrmon_rail_names_get(struct gb_svc *svc,
|
|
struct gb_svc_pwrmon_rail_names_get_response *response,
|
|
size_t bufsize)
|
|
{
|
|
int ret;
|
|
|
|
ret = gb_operation_sync(svc->connection,
|
|
GB_SVC_TYPE_PWRMON_RAIL_NAMES_GET, NULL, 0,
|
|
response, bufsize);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to get rail names: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (response->status != GB_SVC_OP_SUCCESS) {
|
|
dev_err(&svc->dev,
|
|
"SVC error while getting rail names: %u\n",
|
|
response->status);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gb_svc_pwrmon_sample_get(struct gb_svc *svc, u8 rail_id,
|
|
u8 measurement_type, u32 *value)
|
|
{
|
|
struct gb_svc_pwrmon_sample_get_request request;
|
|
struct gb_svc_pwrmon_sample_get_response response;
|
|
int ret;
|
|
|
|
request.rail_id = rail_id;
|
|
request.measurement_type = measurement_type;
|
|
|
|
ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_PWRMON_SAMPLE_GET,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to get rail sample: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (response.result) {
|
|
dev_err(&svc->dev,
|
|
"UniPro error while getting rail power sample (%d %d): %d\n",
|
|
rail_id, measurement_type, response.result);
|
|
switch (response.result) {
|
|
case GB_SVC_PWRMON_GET_SAMPLE_INVAL:
|
|
return -EINVAL;
|
|
case GB_SVC_PWRMON_GET_SAMPLE_NOSUPP:
|
|
return -ENOMSG;
|
|
default:
|
|
return -EREMOTEIO;
|
|
}
|
|
}
|
|
|
|
*value = le32_to_cpu(response.measurement);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_pwrmon_intf_sample_get(struct gb_svc *svc, u8 intf_id,
|
|
u8 measurement_type, u32 *value)
|
|
{
|
|
struct gb_svc_pwrmon_intf_sample_get_request request;
|
|
struct gb_svc_pwrmon_intf_sample_get_response response;
|
|
int ret;
|
|
|
|
request.intf_id = intf_id;
|
|
request.measurement_type = measurement_type;
|
|
|
|
ret = gb_operation_sync(svc->connection,
|
|
GB_SVC_TYPE_PWRMON_INTF_SAMPLE_GET,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to get intf sample: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
if (response.result) {
|
|
dev_err(&svc->dev,
|
|
"UniPro error while getting intf power sample (%d %d): %d\n",
|
|
intf_id, measurement_type, response.result);
|
|
switch (response.result) {
|
|
case GB_SVC_PWRMON_GET_SAMPLE_INVAL:
|
|
return -EINVAL;
|
|
case GB_SVC_PWRMON_GET_SAMPLE_NOSUPP:
|
|
return -ENOMSG;
|
|
default:
|
|
return -EREMOTEIO;
|
|
}
|
|
}
|
|
|
|
*value = le32_to_cpu(response.measurement);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct attribute *svc_attrs[] = {
|
|
&dev_attr_endo_id.attr,
|
|
&dev_attr_ap_intf_id.attr,
|
|
&dev_attr_intf_eject.attr,
|
|
&dev_attr_watchdog.attr,
|
|
&dev_attr_watchdog_action.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(svc);
|
|
|
|
int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id)
|
|
{
|
|
struct gb_svc_intf_device_id_request request;
|
|
|
|
request.intf_id = intf_id;
|
|
request.device_id = device_id;
|
|
|
|
return gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_DEVICE_ID,
|
|
&request, sizeof(request), NULL, 0);
|
|
}
|
|
|
|
int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id)
|
|
{
|
|
struct gb_svc_intf_eject_request request;
|
|
int ret;
|
|
|
|
request.intf_id = intf_id;
|
|
|
|
/*
|
|
* The pulse width for module release in svc is long so we need to
|
|
* increase the timeout so the operation will not return to soon.
|
|
*/
|
|
ret = gb_operation_sync_timeout(svc->connection,
|
|
GB_SVC_TYPE_INTF_EJECT, &request,
|
|
sizeof(request), NULL, 0,
|
|
SVC_INTF_EJECT_TIMEOUT);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to eject interface %u\n", intf_id);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_intf_vsys_set(struct gb_svc *svc, u8 intf_id, bool enable)
|
|
{
|
|
struct gb_svc_intf_vsys_request request;
|
|
struct gb_svc_intf_vsys_response response;
|
|
int type, ret;
|
|
|
|
request.intf_id = intf_id;
|
|
|
|
if (enable)
|
|
type = GB_SVC_TYPE_INTF_VSYS_ENABLE;
|
|
else
|
|
type = GB_SVC_TYPE_INTF_VSYS_DISABLE;
|
|
|
|
ret = gb_operation_sync(svc->connection, type,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret < 0)
|
|
return ret;
|
|
if (response.result_code != GB_SVC_INTF_VSYS_OK)
|
|
return -EREMOTEIO;
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_intf_refclk_set(struct gb_svc *svc, u8 intf_id, bool enable)
|
|
{
|
|
struct gb_svc_intf_refclk_request request;
|
|
struct gb_svc_intf_refclk_response response;
|
|
int type, ret;
|
|
|
|
request.intf_id = intf_id;
|
|
|
|
if (enable)
|
|
type = GB_SVC_TYPE_INTF_REFCLK_ENABLE;
|
|
else
|
|
type = GB_SVC_TYPE_INTF_REFCLK_DISABLE;
|
|
|
|
ret = gb_operation_sync(svc->connection, type,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret < 0)
|
|
return ret;
|
|
if (response.result_code != GB_SVC_INTF_REFCLK_OK)
|
|
return -EREMOTEIO;
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_intf_unipro_set(struct gb_svc *svc, u8 intf_id, bool enable)
|
|
{
|
|
struct gb_svc_intf_unipro_request request;
|
|
struct gb_svc_intf_unipro_response response;
|
|
int type, ret;
|
|
|
|
request.intf_id = intf_id;
|
|
|
|
if (enable)
|
|
type = GB_SVC_TYPE_INTF_UNIPRO_ENABLE;
|
|
else
|
|
type = GB_SVC_TYPE_INTF_UNIPRO_DISABLE;
|
|
|
|
ret = gb_operation_sync(svc->connection, type,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret < 0)
|
|
return ret;
|
|
if (response.result_code != GB_SVC_INTF_UNIPRO_OK)
|
|
return -EREMOTEIO;
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_intf_activate(struct gb_svc *svc, u8 intf_id, u8 *intf_type)
|
|
{
|
|
struct gb_svc_intf_activate_request request;
|
|
struct gb_svc_intf_activate_response response;
|
|
int ret;
|
|
|
|
request.intf_id = intf_id;
|
|
|
|
ret = gb_operation_sync_timeout(svc->connection,
|
|
GB_SVC_TYPE_INTF_ACTIVATE,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response),
|
|
SVC_INTF_ACTIVATE_TIMEOUT);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (response.status != GB_SVC_OP_SUCCESS) {
|
|
dev_err(&svc->dev, "failed to activate interface %u: %u\n",
|
|
intf_id, response.status);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
*intf_type = response.intf_type;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_intf_resume(struct gb_svc *svc, u8 intf_id)
|
|
{
|
|
struct gb_svc_intf_resume_request request;
|
|
struct gb_svc_intf_resume_response response;
|
|
int ret;
|
|
|
|
request.intf_id = intf_id;
|
|
|
|
ret = gb_operation_sync_timeout(svc->connection,
|
|
GB_SVC_TYPE_INTF_RESUME,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response),
|
|
SVC_INTF_RESUME_TIMEOUT);
|
|
if (ret < 0) {
|
|
dev_err(&svc->dev, "failed to send interface resume %u: %d\n",
|
|
intf_id, ret);
|
|
return ret;
|
|
}
|
|
|
|
if (response.status != GB_SVC_OP_SUCCESS) {
|
|
dev_err(&svc->dev, "failed to resume interface %u: %u\n",
|
|
intf_id, response.status);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
|
|
u32 *value)
|
|
{
|
|
struct gb_svc_dme_peer_get_request request;
|
|
struct gb_svc_dme_peer_get_response response;
|
|
u16 result;
|
|
int ret;
|
|
|
|
request.intf_id = intf_id;
|
|
request.attr = cpu_to_le16(attr);
|
|
request.selector = cpu_to_le16(selector);
|
|
|
|
ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_GET,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to get DME attribute (%u 0x%04x %u): %d\n",
|
|
intf_id, attr, selector, ret);
|
|
return ret;
|
|
}
|
|
|
|
result = le16_to_cpu(response.result_code);
|
|
if (result) {
|
|
dev_err(&svc->dev, "UniPro error while getting DME attribute (%u 0x%04x %u): %u\n",
|
|
intf_id, attr, selector, result);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
if (value)
|
|
*value = le32_to_cpu(response.attr_value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector,
|
|
u32 value)
|
|
{
|
|
struct gb_svc_dme_peer_set_request request;
|
|
struct gb_svc_dme_peer_set_response response;
|
|
u16 result;
|
|
int ret;
|
|
|
|
request.intf_id = intf_id;
|
|
request.attr = cpu_to_le16(attr);
|
|
request.selector = cpu_to_le16(selector);
|
|
request.value = cpu_to_le32(value);
|
|
|
|
ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_DME_PEER_SET,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to set DME attribute (%u 0x%04x %u %u): %d\n",
|
|
intf_id, attr, selector, value, ret);
|
|
return ret;
|
|
}
|
|
|
|
result = le16_to_cpu(response.result_code);
|
|
if (result) {
|
|
dev_err(&svc->dev, "UniPro error while setting DME attribute (%u 0x%04x %u %u): %u\n",
|
|
intf_id, attr, selector, value, result);
|
|
return -EREMOTEIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_connection_create(struct gb_svc *svc,
|
|
u8 intf1_id, u16 cport1_id,
|
|
u8 intf2_id, u16 cport2_id,
|
|
u8 cport_flags)
|
|
{
|
|
struct gb_svc_conn_create_request request;
|
|
|
|
request.intf1_id = intf1_id;
|
|
request.cport1_id = cpu_to_le16(cport1_id);
|
|
request.intf2_id = intf2_id;
|
|
request.cport2_id = cpu_to_le16(cport2_id);
|
|
request.tc = 0; /* TC0 */
|
|
request.flags = cport_flags;
|
|
|
|
return gb_operation_sync(svc->connection, GB_SVC_TYPE_CONN_CREATE,
|
|
&request, sizeof(request), NULL, 0);
|
|
}
|
|
|
|
void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id,
|
|
u8 intf2_id, u16 cport2_id)
|
|
{
|
|
struct gb_svc_conn_destroy_request request;
|
|
struct gb_connection *connection = svc->connection;
|
|
int ret;
|
|
|
|
request.intf1_id = intf1_id;
|
|
request.cport1_id = cpu_to_le16(cport1_id);
|
|
request.intf2_id = intf2_id;
|
|
request.cport2_id = cpu_to_le16(cport2_id);
|
|
|
|
ret = gb_operation_sync(connection, GB_SVC_TYPE_CONN_DESTROY,
|
|
&request, sizeof(request), NULL, 0);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to destroy connection (%u:%u %u:%u): %d\n",
|
|
intf1_id, cport1_id, intf2_id, cport2_id, ret);
|
|
}
|
|
}
|
|
|
|
/* Creates bi-directional routes between the devices */
|
|
int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id,
|
|
u8 intf2_id, u8 dev2_id)
|
|
{
|
|
struct gb_svc_route_create_request request;
|
|
|
|
request.intf1_id = intf1_id;
|
|
request.dev1_id = dev1_id;
|
|
request.intf2_id = intf2_id;
|
|
request.dev2_id = dev2_id;
|
|
|
|
return gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_CREATE,
|
|
&request, sizeof(request), NULL, 0);
|
|
}
|
|
|
|
/* Destroys bi-directional routes between the devices */
|
|
void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id)
|
|
{
|
|
struct gb_svc_route_destroy_request request;
|
|
int ret;
|
|
|
|
request.intf1_id = intf1_id;
|
|
request.intf2_id = intf2_id;
|
|
|
|
ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_ROUTE_DESTROY,
|
|
&request, sizeof(request), NULL, 0);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to destroy route (%u %u): %d\n",
|
|
intf1_id, intf2_id, ret);
|
|
}
|
|
}
|
|
|
|
int gb_svc_intf_set_power_mode(struct gb_svc *svc, u8 intf_id, u8 hs_series,
|
|
u8 tx_mode, u8 tx_gear, u8 tx_nlanes,
|
|
u8 tx_amplitude, u8 tx_hs_equalizer,
|
|
u8 rx_mode, u8 rx_gear, u8 rx_nlanes,
|
|
u8 flags, u32 quirks,
|
|
struct gb_svc_l2_timer_cfg *local,
|
|
struct gb_svc_l2_timer_cfg *remote)
|
|
{
|
|
struct gb_svc_intf_set_pwrm_request request;
|
|
struct gb_svc_intf_set_pwrm_response response;
|
|
int ret;
|
|
u16 result_code;
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
request.intf_id = intf_id;
|
|
request.hs_series = hs_series;
|
|
request.tx_mode = tx_mode;
|
|
request.tx_gear = tx_gear;
|
|
request.tx_nlanes = tx_nlanes;
|
|
request.tx_amplitude = tx_amplitude;
|
|
request.tx_hs_equalizer = tx_hs_equalizer;
|
|
request.rx_mode = rx_mode;
|
|
request.rx_gear = rx_gear;
|
|
request.rx_nlanes = rx_nlanes;
|
|
request.flags = flags;
|
|
request.quirks = cpu_to_le32(quirks);
|
|
if (local)
|
|
request.local_l2timerdata = *local;
|
|
if (remote)
|
|
request.remote_l2timerdata = *remote;
|
|
|
|
ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_SET_PWRM,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
result_code = response.result_code;
|
|
if (result_code != GB_SVC_SETPWRM_PWR_LOCAL) {
|
|
dev_err(&svc->dev, "set power mode = %d\n", result_code);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gb_svc_intf_set_power_mode);
|
|
|
|
int gb_svc_intf_set_power_mode_hibernate(struct gb_svc *svc, u8 intf_id)
|
|
{
|
|
struct gb_svc_intf_set_pwrm_request request;
|
|
struct gb_svc_intf_set_pwrm_response response;
|
|
int ret;
|
|
u16 result_code;
|
|
|
|
memset(&request, 0, sizeof(request));
|
|
|
|
request.intf_id = intf_id;
|
|
request.hs_series = GB_SVC_UNIPRO_HS_SERIES_A;
|
|
request.tx_mode = GB_SVC_UNIPRO_HIBERNATE_MODE;
|
|
request.rx_mode = GB_SVC_UNIPRO_HIBERNATE_MODE;
|
|
|
|
ret = gb_operation_sync(svc->connection, GB_SVC_TYPE_INTF_SET_PWRM,
|
|
&request, sizeof(request),
|
|
&response, sizeof(response));
|
|
if (ret < 0) {
|
|
dev_err(&svc->dev,
|
|
"failed to send set power mode operation to interface %u: %d\n",
|
|
intf_id, ret);
|
|
return ret;
|
|
}
|
|
|
|
result_code = response.result_code;
|
|
if (result_code != GB_SVC_SETPWRM_PWR_OK) {
|
|
dev_err(&svc->dev,
|
|
"failed to hibernate the link for interface %u: %u\n",
|
|
intf_id, result_code);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gb_svc_ping(struct gb_svc *svc)
|
|
{
|
|
return gb_operation_sync_timeout(svc->connection, GB_SVC_TYPE_PING,
|
|
NULL, 0, NULL, 0,
|
|
GB_OPERATION_TIMEOUT_DEFAULT * 2);
|
|
}
|
|
|
|
static int gb_svc_version_request(struct gb_operation *op)
|
|
{
|
|
struct gb_connection *connection = op->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
struct gb_svc_version_request *request;
|
|
struct gb_svc_version_response *response;
|
|
|
|
if (op->request->payload_size < sizeof(*request)) {
|
|
dev_err(&svc->dev, "short version request (%zu < %zu)\n",
|
|
op->request->payload_size,
|
|
sizeof(*request));
|
|
return -EINVAL;
|
|
}
|
|
|
|
request = op->request->payload;
|
|
|
|
if (request->major > GB_SVC_VERSION_MAJOR) {
|
|
dev_warn(&svc->dev, "unsupported major version (%u > %u)\n",
|
|
request->major, GB_SVC_VERSION_MAJOR);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
svc->protocol_major = request->major;
|
|
svc->protocol_minor = request->minor;
|
|
|
|
if (!gb_operation_response_alloc(op, sizeof(*response), GFP_KERNEL))
|
|
return -ENOMEM;
|
|
|
|
response = op->response->payload;
|
|
response->major = svc->protocol_major;
|
|
response->minor = svc->protocol_minor;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t pwr_debugfs_voltage_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *offset)
|
|
{
|
|
struct svc_debugfs_pwrmon_rail *pwrmon_rails =
|
|
file_inode(file)->i_private;
|
|
struct gb_svc *svc = pwrmon_rails->svc;
|
|
int ret, desc;
|
|
u32 value;
|
|
char buff[16];
|
|
|
|
ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
|
|
GB_SVC_PWRMON_TYPE_VOL, &value);
|
|
if (ret) {
|
|
dev_err(&svc->dev,
|
|
"failed to get voltage sample %u: %d\n",
|
|
pwrmon_rails->id, ret);
|
|
return ret;
|
|
}
|
|
|
|
desc = scnprintf(buff, sizeof(buff), "%u\n", value);
|
|
|
|
return simple_read_from_buffer(buf, len, offset, buff, desc);
|
|
}
|
|
|
|
static ssize_t pwr_debugfs_current_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *offset)
|
|
{
|
|
struct svc_debugfs_pwrmon_rail *pwrmon_rails =
|
|
file_inode(file)->i_private;
|
|
struct gb_svc *svc = pwrmon_rails->svc;
|
|
int ret, desc;
|
|
u32 value;
|
|
char buff[16];
|
|
|
|
ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
|
|
GB_SVC_PWRMON_TYPE_CURR, &value);
|
|
if (ret) {
|
|
dev_err(&svc->dev,
|
|
"failed to get current sample %u: %d\n",
|
|
pwrmon_rails->id, ret);
|
|
return ret;
|
|
}
|
|
|
|
desc = scnprintf(buff, sizeof(buff), "%u\n", value);
|
|
|
|
return simple_read_from_buffer(buf, len, offset, buff, desc);
|
|
}
|
|
|
|
static ssize_t pwr_debugfs_power_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *offset)
|
|
{
|
|
struct svc_debugfs_pwrmon_rail *pwrmon_rails =
|
|
file_inode(file)->i_private;
|
|
struct gb_svc *svc = pwrmon_rails->svc;
|
|
int ret, desc;
|
|
u32 value;
|
|
char buff[16];
|
|
|
|
ret = gb_svc_pwrmon_sample_get(svc, pwrmon_rails->id,
|
|
GB_SVC_PWRMON_TYPE_PWR, &value);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to get power sample %u: %d\n",
|
|
pwrmon_rails->id, ret);
|
|
return ret;
|
|
}
|
|
|
|
desc = scnprintf(buff, sizeof(buff), "%u\n", value);
|
|
|
|
return simple_read_from_buffer(buf, len, offset, buff, desc);
|
|
}
|
|
|
|
static const struct file_operations pwrmon_debugfs_voltage_fops = {
|
|
.read = pwr_debugfs_voltage_read,
|
|
};
|
|
|
|
static const struct file_operations pwrmon_debugfs_current_fops = {
|
|
.read = pwr_debugfs_current_read,
|
|
};
|
|
|
|
static const struct file_operations pwrmon_debugfs_power_fops = {
|
|
.read = pwr_debugfs_power_read,
|
|
};
|
|
|
|
static void gb_svc_pwrmon_debugfs_init(struct gb_svc *svc)
|
|
{
|
|
int i;
|
|
size_t bufsize;
|
|
struct dentry *dent;
|
|
struct gb_svc_pwrmon_rail_names_get_response *rail_names;
|
|
u8 rail_count;
|
|
|
|
dent = debugfs_create_dir("pwrmon", svc->debugfs_dentry);
|
|
if (IS_ERR_OR_NULL(dent))
|
|
return;
|
|
|
|
if (gb_svc_pwrmon_rail_count_get(svc, &rail_count))
|
|
goto err_pwrmon_debugfs;
|
|
|
|
if (!rail_count || rail_count > GB_SVC_PWRMON_MAX_RAIL_COUNT)
|
|
goto err_pwrmon_debugfs;
|
|
|
|
bufsize = sizeof(*rail_names) +
|
|
GB_SVC_PWRMON_RAIL_NAME_BUFSIZE * rail_count;
|
|
|
|
rail_names = kzalloc(bufsize, GFP_KERNEL);
|
|
if (!rail_names)
|
|
goto err_pwrmon_debugfs;
|
|
|
|
svc->pwrmon_rails = kcalloc(rail_count, sizeof(*svc->pwrmon_rails),
|
|
GFP_KERNEL);
|
|
if (!svc->pwrmon_rails)
|
|
goto err_pwrmon_debugfs_free;
|
|
|
|
if (gb_svc_pwrmon_rail_names_get(svc, rail_names, bufsize))
|
|
goto err_pwrmon_debugfs_free;
|
|
|
|
for (i = 0; i < rail_count; i++) {
|
|
struct dentry *dir;
|
|
struct svc_debugfs_pwrmon_rail *rail = &svc->pwrmon_rails[i];
|
|
char fname[GB_SVC_PWRMON_RAIL_NAME_BUFSIZE];
|
|
|
|
snprintf(fname, sizeof(fname), "%s",
|
|
(char *)&rail_names->name[i]);
|
|
|
|
rail->id = i;
|
|
rail->svc = svc;
|
|
|
|
dir = debugfs_create_dir(fname, dent);
|
|
debugfs_create_file("voltage_now", 0444, dir, rail,
|
|
&pwrmon_debugfs_voltage_fops);
|
|
debugfs_create_file("current_now", 0444, dir, rail,
|
|
&pwrmon_debugfs_current_fops);
|
|
debugfs_create_file("power_now", 0444, dir, rail,
|
|
&pwrmon_debugfs_power_fops);
|
|
}
|
|
|
|
kfree(rail_names);
|
|
return;
|
|
|
|
err_pwrmon_debugfs_free:
|
|
kfree(rail_names);
|
|
kfree(svc->pwrmon_rails);
|
|
svc->pwrmon_rails = NULL;
|
|
|
|
err_pwrmon_debugfs:
|
|
debugfs_remove(dent);
|
|
}
|
|
|
|
static void gb_svc_debugfs_init(struct gb_svc *svc)
|
|
{
|
|
svc->debugfs_dentry = debugfs_create_dir(dev_name(&svc->dev),
|
|
gb_debugfs_get());
|
|
gb_svc_pwrmon_debugfs_init(svc);
|
|
}
|
|
|
|
static void gb_svc_debugfs_exit(struct gb_svc *svc)
|
|
{
|
|
debugfs_remove_recursive(svc->debugfs_dentry);
|
|
kfree(svc->pwrmon_rails);
|
|
svc->pwrmon_rails = NULL;
|
|
}
|
|
|
|
static int gb_svc_hello(struct gb_operation *op)
|
|
{
|
|
struct gb_connection *connection = op->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
struct gb_svc_hello_request *hello_request;
|
|
int ret;
|
|
|
|
if (op->request->payload_size < sizeof(*hello_request)) {
|
|
dev_warn(&svc->dev, "short hello request (%zu < %zu)\n",
|
|
op->request->payload_size,
|
|
sizeof(*hello_request));
|
|
return -EINVAL;
|
|
}
|
|
|
|
hello_request = op->request->payload;
|
|
svc->endo_id = le16_to_cpu(hello_request->endo_id);
|
|
svc->ap_intf_id = hello_request->interface_id;
|
|
|
|
ret = device_add(&svc->dev);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to register svc device: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = gb_svc_watchdog_create(svc);
|
|
if (ret) {
|
|
dev_err(&svc->dev, "failed to create watchdog: %d\n", ret);
|
|
goto err_unregister_device;
|
|
}
|
|
|
|
gb_svc_debugfs_init(svc);
|
|
|
|
return gb_svc_queue_deferred_request(op);
|
|
|
|
err_unregister_device:
|
|
gb_svc_watchdog_destroy(svc);
|
|
device_del(&svc->dev);
|
|
return ret;
|
|
}
|
|
|
|
static struct gb_interface *gb_svc_interface_lookup(struct gb_svc *svc,
|
|
u8 intf_id)
|
|
{
|
|
struct gb_host_device *hd = svc->hd;
|
|
struct gb_module *module;
|
|
size_t num_interfaces;
|
|
u8 module_id;
|
|
|
|
list_for_each_entry(module, &hd->modules, hd_node) {
|
|
module_id = module->module_id;
|
|
num_interfaces = module->num_interfaces;
|
|
|
|
if (intf_id >= module_id &&
|
|
intf_id < module_id + num_interfaces) {
|
|
return module->interfaces[intf_id - module_id];
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct gb_module *gb_svc_module_lookup(struct gb_svc *svc, u8 module_id)
|
|
{
|
|
struct gb_host_device *hd = svc->hd;
|
|
struct gb_module *module;
|
|
|
|
list_for_each_entry(module, &hd->modules, hd_node) {
|
|
if (module->module_id == module_id)
|
|
return module;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void gb_svc_process_hello_deferred(struct gb_operation *operation)
|
|
{
|
|
struct gb_connection *connection = operation->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
int ret;
|
|
|
|
/*
|
|
* XXX This is a hack/work-around to reconfigure the APBridgeA-Switch
|
|
* link to PWM G2, 1 Lane, Slow Auto, so that it has sufficient
|
|
* bandwidth for 3 audio streams plus boot-over-UniPro of a hot-plugged
|
|
* module.
|
|
*
|
|
* The code should be removed once SW-2217, Heuristic for UniPro
|
|
* Power Mode Changes is resolved.
|
|
*/
|
|
ret = gb_svc_intf_set_power_mode(svc, svc->ap_intf_id,
|
|
GB_SVC_UNIPRO_HS_SERIES_A,
|
|
GB_SVC_UNIPRO_SLOW_AUTO_MODE,
|
|
2, 1,
|
|
GB_SVC_SMALL_AMPLITUDE,
|
|
GB_SVC_NO_DE_EMPHASIS,
|
|
GB_SVC_UNIPRO_SLOW_AUTO_MODE,
|
|
2, 1,
|
|
0, 0,
|
|
NULL, NULL);
|
|
|
|
if (ret)
|
|
dev_warn(&svc->dev,
|
|
"power mode change failed on AP to switch link: %d\n",
|
|
ret);
|
|
}
|
|
|
|
static void gb_svc_process_module_inserted(struct gb_operation *operation)
|
|
{
|
|
struct gb_svc_module_inserted_request *request;
|
|
struct gb_connection *connection = operation->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
struct gb_host_device *hd = svc->hd;
|
|
struct gb_module *module;
|
|
size_t num_interfaces;
|
|
u8 module_id;
|
|
u16 flags;
|
|
int ret;
|
|
|
|
/* The request message size has already been verified. */
|
|
request = operation->request->payload;
|
|
module_id = request->primary_intf_id;
|
|
num_interfaces = request->intf_count;
|
|
flags = le16_to_cpu(request->flags);
|
|
|
|
dev_dbg(&svc->dev, "%s - id = %u, num_interfaces = %zu, flags = 0x%04x\n",
|
|
__func__, module_id, num_interfaces, flags);
|
|
|
|
if (flags & GB_SVC_MODULE_INSERTED_FLAG_NO_PRIMARY) {
|
|
dev_warn(&svc->dev, "no primary interface detected on module %u\n",
|
|
module_id);
|
|
}
|
|
|
|
module = gb_svc_module_lookup(svc, module_id);
|
|
if (module) {
|
|
dev_warn(&svc->dev, "unexpected module-inserted event %u\n",
|
|
module_id);
|
|
return;
|
|
}
|
|
|
|
module = gb_module_create(hd, module_id, num_interfaces);
|
|
if (!module) {
|
|
dev_err(&svc->dev, "failed to create module\n");
|
|
return;
|
|
}
|
|
|
|
ret = gb_module_add(module);
|
|
if (ret) {
|
|
gb_module_put(module);
|
|
return;
|
|
}
|
|
|
|
list_add(&module->hd_node, &hd->modules);
|
|
}
|
|
|
|
static void gb_svc_process_module_removed(struct gb_operation *operation)
|
|
{
|
|
struct gb_svc_module_removed_request *request;
|
|
struct gb_connection *connection = operation->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
struct gb_module *module;
|
|
u8 module_id;
|
|
|
|
/* The request message size has already been verified. */
|
|
request = operation->request->payload;
|
|
module_id = request->primary_intf_id;
|
|
|
|
dev_dbg(&svc->dev, "%s - id = %u\n", __func__, module_id);
|
|
|
|
module = gb_svc_module_lookup(svc, module_id);
|
|
if (!module) {
|
|
dev_warn(&svc->dev, "unexpected module-removed event %u\n",
|
|
module_id);
|
|
return;
|
|
}
|
|
|
|
module->disconnected = true;
|
|
|
|
gb_module_del(module);
|
|
list_del(&module->hd_node);
|
|
gb_module_put(module);
|
|
}
|
|
|
|
static void gb_svc_process_intf_oops(struct gb_operation *operation)
|
|
{
|
|
struct gb_svc_intf_oops_request *request;
|
|
struct gb_connection *connection = operation->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
struct gb_interface *intf;
|
|
u8 intf_id;
|
|
u8 reason;
|
|
|
|
/* The request message size has already been verified. */
|
|
request = operation->request->payload;
|
|
intf_id = request->intf_id;
|
|
reason = request->reason;
|
|
|
|
intf = gb_svc_interface_lookup(svc, intf_id);
|
|
if (!intf) {
|
|
dev_warn(&svc->dev, "unexpected interface-oops event %u\n",
|
|
intf_id);
|
|
return;
|
|
}
|
|
|
|
dev_info(&svc->dev, "Deactivating interface %u, interface oops reason = %u\n",
|
|
intf_id, reason);
|
|
|
|
mutex_lock(&intf->mutex);
|
|
intf->disconnected = true;
|
|
gb_interface_disable(intf);
|
|
gb_interface_deactivate(intf);
|
|
mutex_unlock(&intf->mutex);
|
|
}
|
|
|
|
static void gb_svc_process_intf_mailbox_event(struct gb_operation *operation)
|
|
{
|
|
struct gb_svc_intf_mailbox_event_request *request;
|
|
struct gb_connection *connection = operation->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
struct gb_interface *intf;
|
|
u8 intf_id;
|
|
u16 result_code;
|
|
u32 mailbox;
|
|
|
|
/* The request message size has already been verified. */
|
|
request = operation->request->payload;
|
|
intf_id = request->intf_id;
|
|
result_code = le16_to_cpu(request->result_code);
|
|
mailbox = le32_to_cpu(request->mailbox);
|
|
|
|
dev_dbg(&svc->dev, "%s - id = %u, result = 0x%04x, mailbox = 0x%08x\n",
|
|
__func__, intf_id, result_code, mailbox);
|
|
|
|
intf = gb_svc_interface_lookup(svc, intf_id);
|
|
if (!intf) {
|
|
dev_warn(&svc->dev, "unexpected mailbox event %u\n", intf_id);
|
|
return;
|
|
}
|
|
|
|
gb_interface_mailbox_event(intf, result_code, mailbox);
|
|
}
|
|
|
|
static void gb_svc_process_deferred_request(struct work_struct *work)
|
|
{
|
|
struct gb_svc_deferred_request *dr;
|
|
struct gb_operation *operation;
|
|
struct gb_svc *svc;
|
|
u8 type;
|
|
|
|
dr = container_of(work, struct gb_svc_deferred_request, work);
|
|
operation = dr->operation;
|
|
svc = gb_connection_get_data(operation->connection);
|
|
type = operation->request->header->type;
|
|
|
|
switch (type) {
|
|
case GB_SVC_TYPE_SVC_HELLO:
|
|
gb_svc_process_hello_deferred(operation);
|
|
break;
|
|
case GB_SVC_TYPE_MODULE_INSERTED:
|
|
gb_svc_process_module_inserted(operation);
|
|
break;
|
|
case GB_SVC_TYPE_MODULE_REMOVED:
|
|
gb_svc_process_module_removed(operation);
|
|
break;
|
|
case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
|
|
gb_svc_process_intf_mailbox_event(operation);
|
|
break;
|
|
case GB_SVC_TYPE_INTF_OOPS:
|
|
gb_svc_process_intf_oops(operation);
|
|
break;
|
|
default:
|
|
dev_err(&svc->dev, "bad deferred request type: 0x%02x\n", type);
|
|
}
|
|
|
|
gb_operation_put(operation);
|
|
kfree(dr);
|
|
}
|
|
|
|
static int gb_svc_queue_deferred_request(struct gb_operation *operation)
|
|
{
|
|
struct gb_svc *svc = gb_connection_get_data(operation->connection);
|
|
struct gb_svc_deferred_request *dr;
|
|
|
|
dr = kmalloc(sizeof(*dr), GFP_KERNEL);
|
|
if (!dr)
|
|
return -ENOMEM;
|
|
|
|
gb_operation_get(operation);
|
|
|
|
dr->operation = operation;
|
|
INIT_WORK(&dr->work, gb_svc_process_deferred_request);
|
|
|
|
queue_work(svc->wq, &dr->work);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gb_svc_intf_reset_recv(struct gb_operation *op)
|
|
{
|
|
struct gb_svc *svc = gb_connection_get_data(op->connection);
|
|
struct gb_message *request = op->request;
|
|
struct gb_svc_intf_reset_request *reset;
|
|
|
|
if (request->payload_size < sizeof(*reset)) {
|
|
dev_warn(&svc->dev, "short reset request received (%zu < %zu)\n",
|
|
request->payload_size, sizeof(*reset));
|
|
return -EINVAL;
|
|
}
|
|
reset = request->payload;
|
|
|
|
/* FIXME Reset the interface here */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gb_svc_module_inserted_recv(struct gb_operation *op)
|
|
{
|
|
struct gb_svc *svc = gb_connection_get_data(op->connection);
|
|
struct gb_svc_module_inserted_request *request;
|
|
|
|
if (op->request->payload_size < sizeof(*request)) {
|
|
dev_warn(&svc->dev, "short module-inserted request received (%zu < %zu)\n",
|
|
op->request->payload_size, sizeof(*request));
|
|
return -EINVAL;
|
|
}
|
|
|
|
request = op->request->payload;
|
|
|
|
dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
|
|
request->primary_intf_id);
|
|
|
|
return gb_svc_queue_deferred_request(op);
|
|
}
|
|
|
|
static int gb_svc_module_removed_recv(struct gb_operation *op)
|
|
{
|
|
struct gb_svc *svc = gb_connection_get_data(op->connection);
|
|
struct gb_svc_module_removed_request *request;
|
|
|
|
if (op->request->payload_size < sizeof(*request)) {
|
|
dev_warn(&svc->dev, "short module-removed request received (%zu < %zu)\n",
|
|
op->request->payload_size, sizeof(*request));
|
|
return -EINVAL;
|
|
}
|
|
|
|
request = op->request->payload;
|
|
|
|
dev_dbg(&svc->dev, "%s - id = %u\n", __func__,
|
|
request->primary_intf_id);
|
|
|
|
return gb_svc_queue_deferred_request(op);
|
|
}
|
|
|
|
static int gb_svc_intf_oops_recv(struct gb_operation *op)
|
|
{
|
|
struct gb_svc *svc = gb_connection_get_data(op->connection);
|
|
struct gb_svc_intf_oops_request *request;
|
|
|
|
if (op->request->payload_size < sizeof(*request)) {
|
|
dev_warn(&svc->dev, "short intf-oops request received (%zu < %zu)\n",
|
|
op->request->payload_size, sizeof(*request));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return gb_svc_queue_deferred_request(op);
|
|
}
|
|
|
|
static int gb_svc_intf_mailbox_event_recv(struct gb_operation *op)
|
|
{
|
|
struct gb_svc *svc = gb_connection_get_data(op->connection);
|
|
struct gb_svc_intf_mailbox_event_request *request;
|
|
|
|
if (op->request->payload_size < sizeof(*request)) {
|
|
dev_warn(&svc->dev, "short mailbox request received (%zu < %zu)\n",
|
|
op->request->payload_size, sizeof(*request));
|
|
return -EINVAL;
|
|
}
|
|
|
|
request = op->request->payload;
|
|
|
|
dev_dbg(&svc->dev, "%s - id = %u\n", __func__, request->intf_id);
|
|
|
|
return gb_svc_queue_deferred_request(op);
|
|
}
|
|
|
|
static int gb_svc_request_handler(struct gb_operation *op)
|
|
{
|
|
struct gb_connection *connection = op->connection;
|
|
struct gb_svc *svc = gb_connection_get_data(connection);
|
|
u8 type = op->type;
|
|
int ret = 0;
|
|
|
|
/*
|
|
* SVC requests need to follow a specific order (at least initially) and
|
|
* below code takes care of enforcing that. The expected order is:
|
|
* - PROTOCOL_VERSION
|
|
* - SVC_HELLO
|
|
* - Any other request, but the earlier two.
|
|
*
|
|
* Incoming requests are guaranteed to be serialized and so we don't
|
|
* need to protect 'state' for any races.
|
|
*/
|
|
switch (type) {
|
|
case GB_SVC_TYPE_PROTOCOL_VERSION:
|
|
if (svc->state != GB_SVC_STATE_RESET)
|
|
ret = -EINVAL;
|
|
break;
|
|
case GB_SVC_TYPE_SVC_HELLO:
|
|
if (svc->state != GB_SVC_STATE_PROTOCOL_VERSION)
|
|
ret = -EINVAL;
|
|
break;
|
|
default:
|
|
if (svc->state != GB_SVC_STATE_SVC_HELLO)
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (ret) {
|
|
dev_warn(&svc->dev, "unexpected request 0x%02x received (state %u)\n",
|
|
type, svc->state);
|
|
return ret;
|
|
}
|
|
|
|
switch (type) {
|
|
case GB_SVC_TYPE_PROTOCOL_VERSION:
|
|
ret = gb_svc_version_request(op);
|
|
if (!ret)
|
|
svc->state = GB_SVC_STATE_PROTOCOL_VERSION;
|
|
return ret;
|
|
case GB_SVC_TYPE_SVC_HELLO:
|
|
ret = gb_svc_hello(op);
|
|
if (!ret)
|
|
svc->state = GB_SVC_STATE_SVC_HELLO;
|
|
return ret;
|
|
case GB_SVC_TYPE_INTF_RESET:
|
|
return gb_svc_intf_reset_recv(op);
|
|
case GB_SVC_TYPE_MODULE_INSERTED:
|
|
return gb_svc_module_inserted_recv(op);
|
|
case GB_SVC_TYPE_MODULE_REMOVED:
|
|
return gb_svc_module_removed_recv(op);
|
|
case GB_SVC_TYPE_INTF_MAILBOX_EVENT:
|
|
return gb_svc_intf_mailbox_event_recv(op);
|
|
case GB_SVC_TYPE_INTF_OOPS:
|
|
return gb_svc_intf_oops_recv(op);
|
|
default:
|
|
dev_warn(&svc->dev, "unsupported request 0x%02x\n", type);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static void gb_svc_release(struct device *dev)
|
|
{
|
|
struct gb_svc *svc = to_gb_svc(dev);
|
|
|
|
if (svc->connection)
|
|
gb_connection_destroy(svc->connection);
|
|
ida_destroy(&svc->device_id_map);
|
|
destroy_workqueue(svc->wq);
|
|
kfree(svc);
|
|
}
|
|
|
|
struct device_type greybus_svc_type = {
|
|
.name = "greybus_svc",
|
|
.release = gb_svc_release,
|
|
};
|
|
|
|
struct gb_svc *gb_svc_create(struct gb_host_device *hd)
|
|
{
|
|
struct gb_svc *svc;
|
|
|
|
svc = kzalloc(sizeof(*svc), GFP_KERNEL);
|
|
if (!svc)
|
|
return NULL;
|
|
|
|
svc->wq = alloc_workqueue("%s:svc", WQ_UNBOUND, 1, dev_name(&hd->dev));
|
|
if (!svc->wq) {
|
|
kfree(svc);
|
|
return NULL;
|
|
}
|
|
|
|
svc->dev.parent = &hd->dev;
|
|
svc->dev.bus = &greybus_bus_type;
|
|
svc->dev.type = &greybus_svc_type;
|
|
svc->dev.groups = svc_groups;
|
|
svc->dev.dma_mask = svc->dev.parent->dma_mask;
|
|
device_initialize(&svc->dev);
|
|
|
|
dev_set_name(&svc->dev, "%d-svc", hd->bus_id);
|
|
|
|
ida_init(&svc->device_id_map);
|
|
svc->state = GB_SVC_STATE_RESET;
|
|
svc->hd = hd;
|
|
|
|
svc->connection = gb_connection_create_static(hd, GB_SVC_CPORT_ID,
|
|
gb_svc_request_handler);
|
|
if (IS_ERR(svc->connection)) {
|
|
dev_err(&svc->dev, "failed to create connection: %ld\n",
|
|
PTR_ERR(svc->connection));
|
|
goto err_put_device;
|
|
}
|
|
|
|
gb_connection_set_data(svc->connection, svc);
|
|
|
|
return svc;
|
|
|
|
err_put_device:
|
|
put_device(&svc->dev);
|
|
return NULL;
|
|
}
|
|
|
|
int gb_svc_add(struct gb_svc *svc)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* The SVC protocol is currently driven by the SVC, so the SVC device
|
|
* is added from the connection request handler when enough
|
|
* information has been received.
|
|
*/
|
|
ret = gb_connection_enable(svc->connection);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void gb_svc_remove_modules(struct gb_svc *svc)
|
|
{
|
|
struct gb_host_device *hd = svc->hd;
|
|
struct gb_module *module, *tmp;
|
|
|
|
list_for_each_entry_safe(module, tmp, &hd->modules, hd_node) {
|
|
gb_module_del(module);
|
|
list_del(&module->hd_node);
|
|
gb_module_put(module);
|
|
}
|
|
}
|
|
|
|
void gb_svc_del(struct gb_svc *svc)
|
|
{
|
|
gb_connection_disable_rx(svc->connection);
|
|
|
|
/*
|
|
* The SVC device may have been registered from the request handler.
|
|
*/
|
|
if (device_is_registered(&svc->dev)) {
|
|
gb_svc_debugfs_exit(svc);
|
|
gb_svc_watchdog_destroy(svc);
|
|
device_del(&svc->dev);
|
|
}
|
|
|
|
flush_workqueue(svc->wq);
|
|
|
|
gb_svc_remove_modules(svc);
|
|
|
|
gb_connection_disable(svc->connection);
|
|
}
|
|
|
|
void gb_svc_put(struct gb_svc *svc)
|
|
{
|
|
put_device(&svc->dev);
|
|
}
|