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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-15 13:54:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-15 13:54:11 +0200 |
| commit | c1aa01c96e590714d99c5f17cfae1b14dec8bdee (patch) | |
| tree | 5811422f65efdff3fd89fdaf9a8c6d7d1cc4d06b /greybus_svc.patch | |
| parent | 4758ee8bc89a86c2110b9e85878538ced8045ef5 (diff) | |
| download | patches-c1aa01c96e590714d99c5f17cfae1b14dec8bdee.tar.gz | |
greybus patches
Diffstat (limited to 'greybus_svc.patch')
| -rw-r--r-- | greybus_svc.patch | 1808 |
1 files changed, 1808 insertions, 0 deletions
diff --git a/greybus_svc.patch b/greybus_svc.patch new file mode 100644 index 00000000000000..388adcc6737733 --- /dev/null +++ b/greybus_svc.patch @@ -0,0 +1,1808 @@ +--- + drivers/greybus/svc.c | 1486 +++++++++++++++++++++++++++++++++++++++++ + drivers/greybus/svc.h | 109 +++ + drivers/greybus/svc_watchdog.c | 198 +++++ + 3 files changed, 1793 insertions(+) + +--- /dev/null ++++ b/drivers/greybus/svc.c +@@ -0,0 +1,1486 @@ ++/* ++ * SVC Greybus driver. ++ * ++ * Copyright 2015 Google Inc. ++ * Copyright 2015 Linaro Ltd. ++ * ++ * Released under the GPLv2 only. ++ */ ++ ++#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); ++ } ++} ++ ++int gb_svc_timesync_enable(struct gb_svc *svc, u8 count, u64 frame_time, ++ u32 strobe_delay, u32 refclk) ++{ ++ struct gb_connection *connection = svc->connection; ++ struct gb_svc_timesync_enable_request request; ++ ++ request.count = count; ++ request.frame_time = cpu_to_le64(frame_time); ++ request.strobe_delay = cpu_to_le32(strobe_delay); ++ request.refclk = cpu_to_le32(refclk); ++ return gb_operation_sync(connection, ++ GB_SVC_TYPE_TIMESYNC_ENABLE, ++ &request, sizeof(request), NULL, 0); ++} ++ ++int gb_svc_timesync_disable(struct gb_svc *svc) ++{ ++ struct gb_connection *connection = svc->connection; ++ ++ return gb_operation_sync(connection, ++ GB_SVC_TYPE_TIMESYNC_DISABLE, ++ NULL, 0, NULL, 0); ++} ++ ++int gb_svc_timesync_authoritative(struct gb_svc *svc, u64 *frame_time) ++{ ++ struct gb_connection *connection = svc->connection; ++ struct gb_svc_timesync_authoritative_response response; ++ int ret, i; ++ ++ ret = gb_operation_sync(connection, ++ GB_SVC_TYPE_TIMESYNC_AUTHORITATIVE, NULL, 0, ++ &response, sizeof(response)); ++ if (ret < 0) ++ return ret; ++ ++ for (i = 0; i < GB_TIMESYNC_MAX_STROBES; i++) ++ frame_time[i] = le64_to_cpu(response.frame_time[i]); ++ return 0; ++} ++ ++int gb_svc_timesync_ping(struct gb_svc *svc, u64 *frame_time) ++{ ++ struct gb_connection *connection = svc->connection; ++ struct gb_svc_timesync_ping_response response; ++ int ret; ++ ++ ret = gb_operation_sync(connection, ++ GB_SVC_TYPE_TIMESYNC_PING, ++ NULL, 0, ++ &response, sizeof(response)); ++ if (ret < 0) ++ return ret; ++ ++ *frame_time = le64_to_cpu(response.frame_time); ++ return 0; ++} ++ ++int gb_svc_timesync_wake_pins_acquire(struct gb_svc *svc, u32 strobe_mask) ++{ ++ struct gb_connection *connection = svc->connection; ++ struct gb_svc_timesync_wake_pins_acquire_request request; ++ ++ request.strobe_mask = cpu_to_le32(strobe_mask); ++ return gb_operation_sync(connection, ++ GB_SVC_TYPE_TIMESYNC_WAKE_PINS_ACQUIRE, ++ &request, sizeof(request), ++ NULL, 0); ++} ++ ++int gb_svc_timesync_wake_pins_release(struct gb_svc *svc) ++{ ++ struct gb_connection *connection = svc->connection; ++ ++ return gb_operation_sync(connection, ++ GB_SVC_TYPE_TIMESYNC_WAKE_PINS_RELEASE, ++ NULL, 0, NULL, 0); ++} ++ ++/* 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->f_inode->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->f_inode->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->f_inode->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", S_IRUGO, dir, rail, ++ &pwrmon_debugfs_voltage_fops); ++ debugfs_create_file("current_now", S_IRUGO, dir, rail, ++ &pwrmon_debugfs_current_fops); ++ debugfs_create_file("power_now", S_IRUGO, 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); ++ ++ ret = gb_timesync_svc_add(svc); ++ if (ret) { ++ dev_err(&svc->dev, "failed to add SVC to timesync: %d\n", ret); ++ gb_svc_debugfs_exit(svc); ++ goto err_unregister_device; ++ } ++ ++ 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; ++ u8 intf_id; ++ ++ 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; ++ ++ intf_id = reset->intf_id; ++ ++ /* 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_timesync_svc_remove(svc); ++ 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); ++} +--- /dev/null ++++ b/drivers/greybus/svc.h +@@ -0,0 +1,109 @@ ++/* ++ * Greybus SVC code ++ * ++ * Copyright 2015 Google Inc. ++ * Copyright 2015 Linaro Ltd. ++ * ++ * Released under the GPLv2 only. ++ */ ++ ++#ifndef __SVC_H ++#define __SVC_H ++ ++#define GB_SVC_CPORT_FLAG_E2EFC BIT(0) ++#define GB_SVC_CPORT_FLAG_CSD_N BIT(1) ++#define GB_SVC_CPORT_FLAG_CSV_N BIT(2) ++ ++enum gb_svc_state { ++ GB_SVC_STATE_RESET, ++ GB_SVC_STATE_PROTOCOL_VERSION, ++ GB_SVC_STATE_SVC_HELLO, ++}; ++ ++enum gb_svc_watchdog_bite { ++ GB_SVC_WATCHDOG_BITE_RESET_UNIPRO = 0, ++ GB_SVC_WATCHDOG_BITE_PANIC_KERNEL, ++}; ++ ++struct gb_svc_watchdog; ++ ++struct svc_debugfs_pwrmon_rail { ++ u8 id; ++ struct gb_svc *svc; ++}; ++ ++struct gb_svc { ++ struct device dev; ++ ++ struct gb_host_device *hd; ++ struct gb_connection *connection; ++ enum gb_svc_state state; ++ struct ida device_id_map; ++ struct workqueue_struct *wq; ++ ++ u16 endo_id; ++ u8 ap_intf_id; ++ ++ u8 protocol_major; ++ u8 protocol_minor; ++ ++ struct gb_svc_watchdog *watchdog; ++ enum gb_svc_watchdog_bite action; ++ ++ struct dentry *debugfs_dentry; ++ struct svc_debugfs_pwrmon_rail *pwrmon_rails; ++}; ++#define to_gb_svc(d) container_of(d, struct gb_svc, dev) ++ ++struct gb_svc *gb_svc_create(struct gb_host_device *hd); ++int gb_svc_add(struct gb_svc *svc); ++void gb_svc_del(struct gb_svc *svc); ++void gb_svc_put(struct gb_svc *svc); ++ ++int gb_svc_pwrmon_intf_sample_get(struct gb_svc *svc, u8 intf_id, ++ u8 measurement_type, u32 *value); ++int gb_svc_intf_device_id(struct gb_svc *svc, u8 intf_id, u8 device_id); ++int gb_svc_route_create(struct gb_svc *svc, u8 intf1_id, u8 dev1_id, ++ u8 intf2_id, u8 dev2_id); ++void gb_svc_route_destroy(struct gb_svc *svc, u8 intf1_id, u8 intf2_id); ++int gb_svc_connection_create(struct gb_svc *svc, u8 intf1_id, u16 cport1_id, ++ u8 intf2_id, u16 cport2_id, u8 cport_flags); ++void gb_svc_connection_destroy(struct gb_svc *svc, u8 intf1_id, u16 cport1_id, ++ u8 intf2_id, u16 cport2_id); ++int gb_svc_intf_eject(struct gb_svc *svc, u8 intf_id); ++int gb_svc_intf_vsys_set(struct gb_svc *svc, u8 intf_id, bool enable); ++int gb_svc_intf_refclk_set(struct gb_svc *svc, u8 intf_id, bool enable); ++int gb_svc_intf_unipro_set(struct gb_svc *svc, u8 intf_id, bool enable); ++int gb_svc_intf_activate(struct gb_svc *svc, u8 intf_id, u8 *intf_type); ++int gb_svc_intf_resume(struct gb_svc *svc, u8 intf_id); ++ ++int gb_svc_dme_peer_get(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector, ++ u32 *value); ++int gb_svc_dme_peer_set(struct gb_svc *svc, u8 intf_id, u16 attr, u16 selector, ++ u32 value); ++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); ++int gb_svc_intf_set_power_mode_hibernate(struct gb_svc *svc, u8 intf_id); ++int gb_svc_ping(struct gb_svc *svc); ++int gb_svc_watchdog_create(struct gb_svc *svc); ++void gb_svc_watchdog_destroy(struct gb_svc *svc); ++bool gb_svc_watchdog_enabled(struct gb_svc *svc); ++int gb_svc_watchdog_enable(struct gb_svc *svc); ++int gb_svc_watchdog_disable(struct gb_svc *svc); ++int gb_svc_timesync_enable(struct gb_svc *svc, u8 count, u64 frame_time, ++ u32 strobe_delay, u32 refclk); ++int gb_svc_timesync_disable(struct gb_svc *svc); ++int gb_svc_timesync_authoritative(struct gb_svc *svc, u64 *frame_time); ++int gb_svc_timesync_ping(struct gb_svc *svc, u64 *frame_time); ++int gb_svc_timesync_wake_pins_acquire(struct gb_svc *svc, u32 strobe_mask); ++int gb_svc_timesync_wake_pins_release(struct gb_svc *svc); ++ ++int gb_svc_protocol_init(void); ++void gb_svc_protocol_exit(void); ++ ++#endif /* __SVC_H */ +--- /dev/null ++++ b/drivers/greybus/svc_watchdog.c +@@ -0,0 +1,198 @@ ++/* ++ * SVC Greybus "watchdog" driver. ++ * ++ * Copyright 2016 Google Inc. ++ * ++ * Released under the GPLv2 only. ++ */ ++ ++#include <linux/delay.h> ++#include <linux/suspend.h> ++#include <linux/workqueue.h> ++#include "greybus.h" ++ ++#define SVC_WATCHDOG_PERIOD (2*HZ) ++ ++struct gb_svc_watchdog { ++ struct delayed_work work; ++ struct gb_svc *svc; ++ bool enabled; ++ struct notifier_block pm_notifier; ++}; ++ ++static struct delayed_work reset_work; ++ ++static int svc_watchdog_pm_notifier(struct notifier_block *notifier, ++ unsigned long pm_event, void *unused) ++{ ++ struct gb_svc_watchdog *watchdog = ++ container_of(notifier, struct gb_svc_watchdog, pm_notifier); ++ ++ switch (pm_event) { ++ case PM_SUSPEND_PREPARE: ++ gb_svc_watchdog_disable(watchdog->svc); ++ break; ++ case PM_POST_SUSPEND: ++ gb_svc_watchdog_enable(watchdog->svc); ++ break; ++ default: ++ break; ++ } ++ ++ return NOTIFY_DONE; ++} ++ ++static void greybus_reset(struct work_struct *work) ++{ ++ static char start_path[256] = "/system/bin/start"; ++ static char *envp[] = { ++ "HOME=/", ++ "PATH=/sbin:/vendor/bin:/system/sbin:/system/bin:/system/xbin", ++ NULL, ++ }; ++ static char *argv[] = { ++ start_path, ++ "unipro_reset", ++ NULL, ++ }; ++ ++ printk(KERN_ERR "svc_watchdog: calling \"%s %s\" to reset greybus network!\n", ++ argv[0], argv[1]); ++ call_usermodehelper(start_path, argv, envp, UMH_WAIT_EXEC); ++} ++ ++static void do_work(struct work_struct *work) ++{ ++ struct gb_svc_watchdog *watchdog; ++ struct gb_svc *svc; ++ int retval; ++ ++ watchdog = container_of(work, struct gb_svc_watchdog, work.work); ++ svc = watchdog->svc; ++ ++ dev_dbg(&svc->dev, "%s: ping.\n", __func__); ++ retval = gb_svc_ping(svc); ++ if (retval) { ++ /* ++ * Something went really wrong, let's warn userspace and then ++ * pull the plug and reset the whole greybus network. ++ * We need to do this outside of this workqueue as we will be ++ * tearing down the svc device itself. So queue up ++ * yet-another-callback to do that. ++ */ ++ dev_err(&svc->dev, ++ "SVC ping has returned %d, something is wrong!!!\n", ++ retval); ++ ++ if (svc->action == GB_SVC_WATCHDOG_BITE_PANIC_KERNEL) { ++ panic("SVC is not responding\n"); ++ } else if (svc->action == GB_SVC_WATCHDOG_BITE_RESET_UNIPRO) { ++ dev_err(&svc->dev, "Resetting the greybus network, watch out!!!\n"); ++ ++ INIT_DELAYED_WORK(&reset_work, greybus_reset); ++ schedule_delayed_work(&reset_work, HZ / 2); ++ ++ /* ++ * Disable ourselves, we don't want to trip again unless ++ * userspace wants us to. ++ */ ++ watchdog->enabled = false; ++ } ++ } ++ ++ /* resubmit our work to happen again, if we are still "alive" */ ++ if (watchdog->enabled) ++ schedule_delayed_work(&watchdog->work, SVC_WATCHDOG_PERIOD); ++} ++ ++int gb_svc_watchdog_create(struct gb_svc *svc) ++{ ++ struct gb_svc_watchdog *watchdog; ++ int retval; ++ ++ if (svc->watchdog) ++ return 0; ++ ++ watchdog = kmalloc(sizeof(*watchdog), GFP_KERNEL); ++ if (!watchdog) ++ return -ENOMEM; ++ ++ watchdog->enabled = false; ++ watchdog->svc = svc; ++ INIT_DELAYED_WORK(&watchdog->work, do_work); ++ svc->watchdog = watchdog; ++ ++ watchdog->pm_notifier.notifier_call = svc_watchdog_pm_notifier; ++ retval = register_pm_notifier(&watchdog->pm_notifier); ++ if (retval) { ++ dev_err(&svc->dev, "error registering pm notifier(%d)\n", ++ retval); ++ goto svc_watchdog_create_err; ++ } ++ ++ retval = gb_svc_watchdog_enable(svc); ++ if (retval) { ++ dev_err(&svc->dev, "error enabling watchdog (%d)\n", retval); ++ unregister_pm_notifier(&watchdog->pm_notifier); ++ goto svc_watchdog_create_err; ++ } ++ return retval; ++ ++svc_watchdog_create_err: ++ svc->watchdog = NULL; ++ kfree(watchdog); ++ ++ return retval; ++} ++ ++void gb_svc_watchdog_destroy(struct gb_svc *svc) ++{ ++ struct gb_svc_watchdog *watchdog = svc->watchdog; ++ ++ if (!watchdog) ++ return; ++ ++ unregister_pm_notifier(&watchdog->pm_notifier); ++ gb_svc_watchdog_disable(svc); ++ svc->watchdog = NULL; ++ kfree(watchdog); ++} ++ ++bool gb_svc_watchdog_enabled(struct gb_svc *svc) ++{ ++ if (!svc || !svc->watchdog) ++ return false; ++ return svc->watchdog->enabled; ++} ++ ++int gb_svc_watchdog_enable(struct gb_svc *svc) ++{ ++ struct gb_svc_watchdog *watchdog; ++ ++ if (!svc->watchdog) ++ return -ENODEV; ++ ++ watchdog = svc->watchdog; ++ if (watchdog->enabled) ++ return 0; ++ ++ watchdog->enabled = true; ++ schedule_delayed_work(&watchdog->work, SVC_WATCHDOG_PERIOD); ++ return 0; ++} ++ ++int gb_svc_watchdog_disable(struct gb_svc *svc) ++{ ++ struct gb_svc_watchdog *watchdog; ++ ++ if (!svc->watchdog) ++ return -ENODEV; ++ ++ watchdog = svc->watchdog; ++ if (!watchdog->enabled) ++ return 0; ++ ++ watchdog->enabled = false; ++ cancel_delayed_work_sync(&watchdog->work); ++ return 0; ++} |