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-rw-r--r--drivers/misc/mei/Makefile2
-rw-r--r--drivers/misc/mei/bus-fixup.c306
-rw-r--r--drivers/misc/mei/bus.c1008
-rw-r--r--drivers/misc/mei/client.c333
-rw-r--r--drivers/misc/mei/client.h8
-rw-r--r--drivers/misc/mei/debugfs.c9
-rw-r--r--drivers/misc/mei/hbm.c330
-rw-r--r--drivers/misc/mei/hbm.h3
-rw-r--r--drivers/misc/mei/hw-me-regs.h27
-rw-r--r--drivers/misc/mei/hw-me.c499
-rw-r--r--drivers/misc/mei/hw-me.h8
-rw-r--r--drivers/misc/mei/hw.h134
-rw-r--r--drivers/misc/mei/init.c3
-rw-r--r--drivers/misc/mei/interrupt.c27
-rw-r--r--drivers/misc/mei/main.c96
-rw-r--r--drivers/misc/mei/mei_dev.h47
-rw-r--r--drivers/misc/mei/nfc.c415
-rw-r--r--drivers/misc/mei/pci-me.c32
-rw-r--r--drivers/misc/mei/wd.c1
19 files changed, 2361 insertions, 927 deletions
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index 518914a82..01447ca21 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -11,7 +11,7 @@ mei-objs += main.o
mei-objs += amthif.o
mei-objs += wd.o
mei-objs += bus.o
-mei-objs += nfc.o
+mei-objs += bus-fixup.o
mei-$(CONFIG_DEBUG_FS) += debugfs.o
obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o
diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c
new file mode 100644
index 000000000..3e536ca85
--- /dev/null
+++ b/drivers/misc/mei/bus-fixup.c
@@ -0,0 +1,306 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2013, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/uuid.h>
+
+#include <linux/mei_cl_bus.h>
+
+#include "mei_dev.h"
+#include "client.h"
+
+#define MEI_UUID_NFC_INFO UUID_LE(0xd2de1625, 0x382d, 0x417d, \
+ 0x48, 0xa4, 0xef, 0xab, 0xba, 0x8a, 0x12, 0x06)
+
+static const uuid_le mei_nfc_info_guid = MEI_UUID_NFC_INFO;
+
+#define MEI_UUID_NFC_HCI UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50, \
+ 0x94, 0xd4, 0x50, 0x26, 0x67, 0x23, 0x77, 0x5c)
+
+#define MEI_UUID_ANY NULL_UUID_LE
+
+/**
+ * number_of_connections - determine whether an client be on the bus
+ * according number of connections
+ * We support only clients:
+ * 1. with single connection
+ * 2. and fixed clients (max_number_of_connections == 0)
+ *
+ * @cldev: me clients device
+ */
+static void number_of_connections(struct mei_cl_device *cldev)
+{
+ dev_dbg(&cldev->dev, "running hook %s on %pUl\n",
+ __func__, mei_me_cl_uuid(cldev->me_cl));
+
+ if (cldev->me_cl->props.max_number_of_connections > 1)
+ cldev->do_match = 0;
+}
+
+/**
+ * blacklist - blacklist a client from the bus
+ *
+ * @cldev: me clients device
+ */
+static void blacklist(struct mei_cl_device *cldev)
+{
+ dev_dbg(&cldev->dev, "running hook %s on %pUl\n",
+ __func__, mei_me_cl_uuid(cldev->me_cl));
+ cldev->do_match = 0;
+}
+
+struct mei_nfc_cmd {
+ u8 command;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+ u8 sub_command;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_reply {
+ u8 command;
+ u8 status;
+ u16 req_id;
+ u32 reserved;
+ u16 data_size;
+ u8 sub_command;
+ u8 reply_status;
+ u8 data[];
+} __packed;
+
+struct mei_nfc_if_version {
+ u8 radio_version_sw[3];
+ u8 reserved[3];
+ u8 radio_version_hw[3];
+ u8 i2c_addr;
+ u8 fw_ivn;
+ u8 vendor_id;
+ u8 radio_type;
+} __packed;
+
+
+#define MEI_NFC_CMD_MAINTENANCE 0x00
+#define MEI_NFC_SUBCMD_IF_VERSION 0x01
+
+/* Vendors */
+#define MEI_NFC_VENDOR_INSIDE 0x00
+#define MEI_NFC_VENDOR_NXP 0x01
+
+/* Radio types */
+#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
+#define MEI_NFC_VENDOR_NXP_PN544 0x01
+
+/**
+ * mei_nfc_if_version - get NFC interface version
+ *
+ * @cl: host client (nfc info)
+ * @ver: NFC interface version to be filled in
+ *
+ * Return: 0 on success; < 0 otherwise
+ */
+static int mei_nfc_if_version(struct mei_cl *cl,
+ struct mei_nfc_if_version *ver)
+{
+ struct mei_device *bus;
+ struct mei_nfc_cmd cmd = {
+ .command = MEI_NFC_CMD_MAINTENANCE,
+ .data_size = 1,
+ .sub_command = MEI_NFC_SUBCMD_IF_VERSION,
+ };
+ struct mei_nfc_reply *reply = NULL;
+ size_t if_version_length;
+ int bytes_recv, ret;
+
+ bus = cl->dev;
+
+ WARN_ON(mutex_is_locked(&bus->device_lock));
+
+ ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd), 1);
+ if (ret < 0) {
+ dev_err(bus->dev, "Could not send IF version cmd\n");
+ return ret;
+ }
+
+ /* to be sure on the stack we alloc memory */
+ if_version_length = sizeof(struct mei_nfc_reply) +
+ sizeof(struct mei_nfc_if_version);
+
+ reply = kzalloc(if_version_length, GFP_KERNEL);
+ if (!reply)
+ return -ENOMEM;
+
+ ret = 0;
+ bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length);
+ if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
+ dev_err(bus->dev, "Could not read IF version\n");
+ ret = -EIO;
+ goto err;
+ }
+
+ memcpy(ver, reply->data, sizeof(struct mei_nfc_if_version));
+
+ dev_info(bus->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
+ ver->fw_ivn, ver->vendor_id, ver->radio_type);
+
+err:
+ kfree(reply);
+ return ret;
+}
+
+/**
+ * mei_nfc_radio_name - derive nfc radio name from the interface version
+ *
+ * @ver: NFC radio version
+ *
+ * Return: radio name string
+ */
+static const char *mei_nfc_radio_name(struct mei_nfc_if_version *ver)
+{
+
+ if (ver->vendor_id == MEI_NFC_VENDOR_INSIDE) {
+ if (ver->radio_type == MEI_NFC_VENDOR_INSIDE_UREAD)
+ return "microread";
+ }
+
+ if (ver->vendor_id == MEI_NFC_VENDOR_NXP) {
+ if (ver->radio_type == MEI_NFC_VENDOR_NXP_PN544)
+ return "pn544";
+ }
+
+ return NULL;
+}
+
+/**
+ * mei_nfc - The nfc fixup function. The function retrieves nfc radio
+ * name and set is as device attribute so we can load
+ * the proper device driver for it
+ *
+ * @cldev: me client device (nfc)
+ */
+static void mei_nfc(struct mei_cl_device *cldev)
+{
+ struct mei_device *bus;
+ struct mei_cl *cl;
+ struct mei_me_client *me_cl = NULL;
+ struct mei_nfc_if_version ver;
+ const char *radio_name = NULL;
+ int ret;
+
+ bus = cldev->bus;
+
+ dev_dbg(bus->dev, "running hook %s: %pUl match=%d\n",
+ __func__, mei_me_cl_uuid(cldev->me_cl), cldev->do_match);
+
+ mutex_lock(&bus->device_lock);
+ /* we need to connect to INFO GUID */
+ cl = mei_cl_alloc_linked(bus, MEI_HOST_CLIENT_ID_ANY);
+ if (IS_ERR(cl)) {
+ ret = PTR_ERR(cl);
+ cl = NULL;
+ dev_err(bus->dev, "nfc hook alloc failed %d\n", ret);
+ goto out;
+ }
+
+ me_cl = mei_me_cl_by_uuid(bus, &mei_nfc_info_guid);
+ if (!me_cl) {
+ ret = -ENOTTY;
+ dev_err(bus->dev, "Cannot find nfc info %d\n", ret);
+ goto out;
+ }
+
+ ret = mei_cl_connect(cl, me_cl, NULL);
+ if (ret < 0) {
+ dev_err(&cldev->dev, "Can't connect to the NFC INFO ME ret = %d\n",
+ ret);
+ goto out;
+ }
+
+ mutex_unlock(&bus->device_lock);
+
+ ret = mei_nfc_if_version(cl, &ver);
+ if (ret)
+ goto disconnect;
+
+ radio_name = mei_nfc_radio_name(&ver);
+
+ if (!radio_name) {
+ ret = -ENOENT;
+ dev_err(&cldev->dev, "Can't get the NFC interface version ret = %d\n",
+ ret);
+ goto disconnect;
+ }
+
+ dev_dbg(bus->dev, "nfc radio %s\n", radio_name);
+ strlcpy(cldev->name, radio_name, sizeof(cldev->name));
+
+disconnect:
+ mutex_lock(&bus->device_lock);
+ if (mei_cl_disconnect(cl) < 0)
+ dev_err(bus->dev, "Can't disconnect the NFC INFO ME\n");
+
+ mei_cl_flush_queues(cl, NULL);
+
+out:
+ mei_cl_unlink(cl);
+ mutex_unlock(&bus->device_lock);
+ mei_me_cl_put(me_cl);
+ kfree(cl);
+
+ if (ret)
+ cldev->do_match = 0;
+
+ dev_dbg(bus->dev, "end of fixup match = %d\n", cldev->do_match);
+}
+
+#define MEI_FIXUP(_uuid, _hook) { _uuid, _hook }
+
+static struct mei_fixup {
+
+ const uuid_le uuid;
+ void (*hook)(struct mei_cl_device *cldev);
+} mei_fixups[] = {
+ MEI_FIXUP(MEI_UUID_ANY, number_of_connections),
+ MEI_FIXUP(MEI_UUID_NFC_INFO, blacklist),
+ MEI_FIXUP(MEI_UUID_NFC_HCI, mei_nfc),
+};
+
+/**
+ * mei_cl_dev_fixup - run fixup handlers
+ *
+ * @cldev: me client device
+ */
+void mei_cl_dev_fixup(struct mei_cl_device *cldev)
+{
+ struct mei_fixup *f;
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mei_fixups); i++) {
+
+ f = &mei_fixups[i];
+ if (uuid_le_cmp(f->uuid, MEI_UUID_ANY) == 0 ||
+ uuid_le_cmp(f->uuid, *uuid) == 0)
+ f->hook(cldev);
+ }
+}
+
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 458aa5a09..eef1c6b46 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -30,276 +30,29 @@
#define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver)
#define to_mei_cl_device(d) container_of(d, struct mei_cl_device, dev)
-static int mei_cl_device_match(struct device *dev, struct device_driver *drv)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- struct mei_cl_driver *driver = to_mei_cl_driver(drv);
- const struct mei_cl_device_id *id;
- const uuid_le *uuid;
- const char *name;
-
- if (!device)
- return 0;
-
- uuid = mei_me_cl_uuid(device->me_cl);
- name = device->name;
-
- if (!driver || !driver->id_table)
- return 0;
-
- id = driver->id_table;
-
- while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) {
-
- if (!uuid_le_cmp(*uuid, id->uuid)) {
- if (id->name[0]) {
- if (!strncmp(name, id->name, sizeof(id->name)))
- return 1;
- } else {
- return 1;
- }
- }
-
- id++;
- }
-
- return 0;
-}
-
-static int mei_cl_device_probe(struct device *dev)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- struct mei_cl_driver *driver;
- struct mei_cl_device_id id;
-
- if (!device)
- return 0;
-
- driver = to_mei_cl_driver(dev->driver);
- if (!driver || !driver->probe)
- return -ENODEV;
-
- dev_dbg(dev, "Device probe\n");
-
- strlcpy(id.name, device->name, sizeof(id.name));
-
- return driver->probe(device, &id);
-}
-
-static int mei_cl_device_remove(struct device *dev)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- struct mei_cl_driver *driver;
-
- if (!device || !dev->driver)
- return 0;
-
- if (device->event_cb) {
- device->event_cb = NULL;
- cancel_work_sync(&device->event_work);
- }
-
- driver = to_mei_cl_driver(dev->driver);
- if (!driver->remove) {
- dev->driver = NULL;
-
- return 0;
- }
-
- return driver->remove(device);
-}
-
-static ssize_t name_show(struct device *dev, struct device_attribute *a,
- char *buf)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- size_t len;
-
- len = snprintf(buf, PAGE_SIZE, "%s", device->name);
-
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
-}
-static DEVICE_ATTR_RO(name);
-
-static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
- char *buf)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- const uuid_le *uuid = mei_me_cl_uuid(device->me_cl);
- size_t len;
-
- len = snprintf(buf, PAGE_SIZE, "%pUl", uuid);
-
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
-}
-static DEVICE_ATTR_RO(uuid);
-
-static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
- char *buf)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- const uuid_le *uuid = mei_me_cl_uuid(device->me_cl);
- size_t len;
-
- len = snprintf(buf, PAGE_SIZE, "mei:%s:" MEI_CL_UUID_FMT ":",
- device->name, MEI_CL_UUID_ARGS(uuid->b));
-
- return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
-}
-static DEVICE_ATTR_RO(modalias);
-
-static struct attribute *mei_cl_dev_attrs[] = {
- &dev_attr_name.attr,
- &dev_attr_uuid.attr,
- &dev_attr_modalias.attr,
- NULL,
-};
-ATTRIBUTE_GROUPS(mei_cl_dev);
-
-static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
- const uuid_le *uuid = mei_me_cl_uuid(device->me_cl);
-
- if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
- return -ENOMEM;
-
- if (add_uevent_var(env, "MEI_CL_NAME=%s", device->name))
- return -ENOMEM;
-
- if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":",
- device->name, MEI_CL_UUID_ARGS(uuid->b)))
- return -ENOMEM;
-
- return 0;
-}
-
-static struct bus_type mei_cl_bus_type = {
- .name = "mei",
- .dev_groups = mei_cl_dev_groups,
- .match = mei_cl_device_match,
- .probe = mei_cl_device_probe,
- .remove = mei_cl_device_remove,
- .uevent = mei_cl_uevent,
-};
-
-static void mei_cl_dev_release(struct device *dev)
-{
- struct mei_cl_device *device = to_mei_cl_device(dev);
-
- if (!device)
- return;
-
- mei_me_cl_put(device->me_cl);
- kfree(device);
-}
-
-static struct device_type mei_cl_device_type = {
- .release = mei_cl_dev_release,
-};
-
-struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev,
- uuid_le uuid)
-{
- struct mei_cl *cl;
-
- list_for_each_entry(cl, &dev->device_list, device_link) {
- if (cl->device && cl->device->me_cl &&
- !uuid_le_cmp(uuid, *mei_me_cl_uuid(cl->device->me_cl)))
- return cl;
- }
-
- return NULL;
-}
-
-struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
- struct mei_me_client *me_cl,
- struct mei_cl *cl,
- char *name)
-{
- struct mei_cl_device *device;
- int status;
-
- device = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
- if (!device)
- return NULL;
-
- device->me_cl = mei_me_cl_get(me_cl);
- if (!device->me_cl) {
- kfree(device);
- return NULL;
- }
-
- device->cl = cl;
- device->dev.parent = dev->dev;
- device->dev.bus = &mei_cl_bus_type;
- device->dev.type = &mei_cl_device_type;
-
- strlcpy(device->name, name, sizeof(device->name));
-
- dev_set_name(&device->dev, "mei:%s:%pUl", name, mei_me_cl_uuid(me_cl));
-
- status = device_register(&device->dev);
- if (status) {
- dev_err(dev->dev, "Failed to register MEI device\n");
- mei_me_cl_put(device->me_cl);
- kfree(device);
- return NULL;
- }
-
- cl->device = device;
-
- dev_dbg(&device->dev, "client %s registered\n", name);
-
- return device;
-}
-EXPORT_SYMBOL_GPL(mei_cl_add_device);
-
-void mei_cl_remove_device(struct mei_cl_device *device)
-{
- device_unregister(&device->dev);
-}
-EXPORT_SYMBOL_GPL(mei_cl_remove_device);
-
-int __mei_cl_driver_register(struct mei_cl_driver *driver, struct module *owner)
-{
- int err;
-
- driver->driver.name = driver->name;
- driver->driver.owner = owner;
- driver->driver.bus = &mei_cl_bus_type;
-
- err = driver_register(&driver->driver);
- if (err)
- return err;
-
- pr_debug("mei: driver [%s] registered\n", driver->driver.name);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(__mei_cl_driver_register);
-
-void mei_cl_driver_unregister(struct mei_cl_driver *driver)
-{
- driver_unregister(&driver->driver);
-
- pr_debug("mei: driver [%s] unregistered\n", driver->driver.name);
-}
-EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
-
+/**
+ * __mei_cl_send - internal client send (write)
+ *
+ * @cl: host client
+ * @buf: buffer to send
+ * @length: buffer length
+ * @blocking: wait for write completion
+ *
+ * Return: written size bytes or < 0 on error
+ */
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
bool blocking)
{
- struct mei_device *dev;
+ struct mei_device *bus;
struct mei_cl_cb *cb = NULL;
ssize_t rets;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
- dev = cl->dev;
+ bus = cl->dev;
- mutex_lock(&dev->device_lock);
+ mutex_lock(&bus->device_lock);
if (!mei_cl_is_connected(cl)) {
rets = -ENODEV;
goto out;
@@ -327,16 +80,25 @@ ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
rets = mei_cl_write(cl, cb, blocking);
out:
- mutex_unlock(&dev->device_lock);
+ mutex_unlock(&bus->device_lock);
if (rets < 0)
mei_io_cb_free(cb);
return rets;
}
+/**
+ * __mei_cl_recv - internal client receive (read)
+ *
+ * @cl: host client
+ * @buf: buffer to send
+ * @length: buffer length
+ *
+ * Return: read size in bytes of < 0 on error
+ */
ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
{
- struct mei_device *dev;
+ struct mei_device *bus;
struct mei_cl_cb *cb;
size_t r_length;
ssize_t rets;
@@ -344,9 +106,9 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
- dev = cl->dev;
+ bus = cl->dev;
- mutex_lock(&dev->device_lock);
+ mutex_lock(&bus->device_lock);
cb = mei_cl_read_cb(cl, NULL);
if (cb)
@@ -356,9 +118,10 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
if (rets && rets != -EBUSY)
goto out;
+ /* wait on event only if there is no other waiter */
if (list_empty(&cl->rd_completed) && !waitqueue_active(&cl->rx_wait)) {
- mutex_unlock(&dev->device_lock);
+ mutex_unlock(&bus->device_lock);
if (wait_event_interruptible(cl->rx_wait,
(!list_empty(&cl->rd_completed)) ||
@@ -369,7 +132,7 @@ ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
return -ERESTARTSYS;
}
- mutex_lock(&dev->device_lock);
+ mutex_lock(&bus->device_lock);
if (!mei_cl_is_connected(cl)) {
rets = -EBUSY;
@@ -396,14 +159,23 @@ copy:
free:
mei_io_cb_free(cb);
out:
- mutex_unlock(&dev->device_lock);
+ mutex_unlock(&bus->device_lock);
return rets;
}
-ssize_t mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
+/**
+ * mei_cl_send - me device send (write)
+ *
+ * @cldev: me client device
+ * @buf: buffer to send
+ * @length: buffer length
+ *
+ * Return: written size in bytes or < 0 on error
+ */
+ssize_t mei_cl_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
{
- struct mei_cl *cl = device->cl;
+ struct mei_cl *cl = cldev->cl;
if (cl == NULL)
return -ENODEV;
@@ -412,9 +184,18 @@ ssize_t mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
}
EXPORT_SYMBOL_GPL(mei_cl_send);
-ssize_t mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length)
+/**
+ * mei_cl_recv - client receive (read)
+ *
+ * @cldev: me client device
+ * @buf: buffer to send
+ * @length: buffer length
+ *
+ * Return: read size in bytes of < 0 on error
+ */
+ssize_t mei_cl_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
{
- struct mei_cl *cl = device->cl;
+ struct mei_cl *cl = cldev->cl;
if (cl == NULL)
return -ENODEV;
@@ -423,134 +204,697 @@ ssize_t mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length)
}
EXPORT_SYMBOL_GPL(mei_cl_recv);
+/**
+ * mei_bus_event_work - dispatch rx event for a bus device
+ * and schedule new work
+ *
+ * @work: work
+ */
static void mei_bus_event_work(struct work_struct *work)
{
- struct mei_cl_device *device;
+ struct mei_cl_device *cldev;
- device = container_of(work, struct mei_cl_device, event_work);
+ cldev = container_of(work, struct mei_cl_device, event_work);
- if (device->event_cb)
- device->event_cb(device, device->events, device->event_context);
+ if (cldev->event_cb)
+ cldev->event_cb(cldev, cldev->events, cldev->event_context);
- device->events = 0;
+ cldev->events = 0;
/* Prepare for the next read */
- mei_cl_read_start(device->cl, 0, NULL);
+ if (cldev->events_mask & BIT(MEI_CL_EVENT_RX))
+ mei_cl_read_start(cldev->cl, 0, NULL);
}
-int mei_cl_register_event_cb(struct mei_cl_device *device,
+/**
+ * mei_cl_bus_notify_event - schedule notify cb on bus client
+ *
+ * @cl: host client
+ */
+void mei_cl_bus_notify_event(struct mei_cl *cl)
+{
+ struct mei_cl_device *cldev = cl->cldev;
+
+ if (!cldev || !cldev->event_cb)
+ return;
+
+ if (!(cldev->events_mask & BIT(MEI_CL_EVENT_NOTIF)))
+ return;
+
+ if (!cl->notify_ev)
+ return;
+
+ set_bit(MEI_CL_EVENT_NOTIF, &cldev->events);
+
+ schedule_work(&cldev->event_work);
+
+ cl->notify_ev = false;
+}
+
+/**
+ * mei_cl_bus_rx_event - schedule rx evenet
+ *
+ * @cl: host client
+ */
+void mei_cl_bus_rx_event(struct mei_cl *cl)
+{
+ struct mei_cl_device *cldev = cl->cldev;
+
+ if (!cldev || !cldev->event_cb)
+ return;
+
+ if (!(cldev->events_mask & BIT(MEI_CL_EVENT_RX)))
+ return;
+
+ set_bit(MEI_CL_EVENT_RX, &cldev->events);
+
+ schedule_work(&cldev->event_work);
+}
+
+/**
+ * mei_cl_register_event_cb - register event callback
+ *
+ * @cldev: me client devices
+ * @event_cb: callback function
+ * @events_mask: requested events bitmask
+ * @context: driver context data
+ *
+ * Return: 0 on success
+ * -EALREADY if an callback is already registered
+ * <0 on other errors
+ */
+int mei_cl_register_event_cb(struct mei_cl_device *cldev,
+ unsigned long events_mask,
mei_cl_event_cb_t event_cb, void *context)
{
- if (device->event_cb)
+ int ret;
+
+ if (cldev->event_cb)
return -EALREADY;
- device->events = 0;
- device->event_cb = event_cb;
- device->event_context = context;
- INIT_WORK(&device->event_work, mei_bus_event_work);
+ cldev->events = 0;
+ cldev->events_mask = events_mask;
+ cldev->event_cb = event_cb;
+ cldev->event_context = context;
+ INIT_WORK(&cldev->event_work, mei_bus_event_work);
- mei_cl_read_start(device->cl, 0, NULL);
+ if (cldev->events_mask & BIT(MEI_CL_EVENT_RX)) {
+ ret = mei_cl_read_start(cldev->cl, 0, NULL);
+ if (ret && ret != -EBUSY)
+ return ret;
+ }
+
+ if (cldev->events_mask & BIT(MEI_CL_EVENT_NOTIF)) {
+ mutex_lock(&cldev->cl->dev->device_lock);
+ ret = mei_cl_notify_request(cldev->cl, NULL, event_cb ? 1 : 0);
+ mutex_unlock(&cldev->cl->dev->device_lock);
+ if (ret)
+ return ret;
+ }
return 0;
}
EXPORT_SYMBOL_GPL(mei_cl_register_event_cb);
-void *mei_cl_get_drvdata(const struct mei_cl_device *device)
+/**
+ * mei_cl_get_drvdata - driver data getter
+ *
+ * @cldev: mei client device
+ *
+ * Return: driver private data
+ */
+void *mei_cl_get_drvdata(const struct mei_cl_device *cldev)
{
- return dev_get_drvdata(&device->dev);
+ return dev_get_drvdata(&cldev->dev);
}
EXPORT_SYMBOL_GPL(mei_cl_get_drvdata);
-void mei_cl_set_drvdata(struct mei_cl_device *device, void *data)
+/**
+ * mei_cl_set_drvdata - driver data setter
+ *
+ * @cldev: mei client device
+ * @data: data to store
+ */
+void mei_cl_set_drvdata(struct mei_cl_device *cldev, void *data)
{
- dev_set_drvdata(&device->dev, data);
+ dev_set_drvdata(&cldev->dev, data);
}
EXPORT_SYMBOL_GPL(mei_cl_set_drvdata);
-int mei_cl_enable_device(struct mei_cl_device *device)
+/**
+ * mei_cl_enable_device - enable me client device
+ * create connection with me client
+ *
+ * @cldev: me client device
+ *
+ * Return: 0 on success and < 0 on error
+ */
+int mei_cl_enable_device(struct mei_cl_device *cldev)
{
- int err;
- struct mei_device *dev;
- struct mei_cl *cl = device->cl;
-
- if (cl == NULL)
- return -ENODEV;
-
- dev = cl->dev;
-
- mutex_lock(&dev->device_lock);
+ struct mei_device *bus = cldev->bus;
+ struct mei_cl *cl;
+ int ret;
+
+ cl = cldev->cl;
+
+ if (!cl) {
+ mutex_lock(&bus->device_lock);
+ cl = mei_cl_alloc_linked(bus, MEI_HOST_CLIENT_ID_ANY);
+ mutex_unlock(&bus->device_lock);
+ if (IS_ERR(cl))
+ return PTR_ERR(cl);
+ /* update pointers */
+ cldev->cl = cl;
+ cl->cldev = cldev;
+ }
+ mutex_lock(&bus->device_lock);
if (mei_cl_is_connected(cl)) {
- mutex_unlock(&dev->device_lock);
- dev_warn(dev->dev, "Already connected");
- return -EBUSY;
+ ret = 0;
+ goto out;
}
- err = mei_cl_connect(cl, device->me_cl, NULL);
- if (err < 0) {
- mutex_unlock(&dev->device_lock);
- dev_err(dev->dev, "Could not connect to the ME client");
-
- return err;
+ if (!mei_me_cl_is_active(cldev->me_cl)) {
+ dev_err(&cldev->dev, "me client is not active\n");
+ ret = -ENOTTY;
+ goto out;
}
- mutex_unlock(&dev->device_lock);
+ ret = mei_cl_connect(cl, cldev->me_cl, NULL);
+ if (ret < 0)
+ dev_err(&cldev->dev, "cannot connect\n");
- if (device->event_cb)
- mei_cl_read_start(device->cl, 0, NULL);
+out:
+ mutex_unlock(&bus->device_lock);
- return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(mei_cl_enable_device);
-int mei_cl_disable_device(struct mei_cl_device *device)
+/**
+ * mei_cl_disable_device - disable me client device
+ * disconnect form the me client
+ *
+ * @cldev: me client device
+ *
+ * Return: 0 on success and < 0 on error
+ */
+int mei_cl_disable_device(struct mei_cl_device *cldev)
{
+ struct mei_device *bus;
+ struct mei_cl *cl;
int err;
- struct mei_device *dev;
- struct mei_cl *cl = device->cl;
- if (cl == NULL)
+ if (!cldev || !cldev->cl)
return -ENODEV;
- dev = cl->dev;
+ cl = cldev->cl;
- device->event_cb = NULL;
+ bus = cldev->bus;
- mutex_lock(&dev->device_lock);
+ cldev->event_cb = NULL;
+
+ mutex_lock(&bus->device_lock);
if (!mei_cl_is_connected(cl)) {
- dev_err(dev->dev, "Already disconnected");
+ dev_err(bus->dev, "Already disconnected");
err = 0;
goto out;
}
err = mei_cl_disconnect(cl);
- if (err < 0) {
- dev_err(dev->dev, "Could not disconnect from the ME client");
- goto out;
- }
+ if (err < 0)
+ dev_err(bus->dev, "Could not disconnect from the ME client");
+out:
/* Flush queues and remove any pending read */
mei_cl_flush_queues(cl, NULL);
+ mei_cl_unlink(cl);
-out:
- mutex_unlock(&dev->device_lock);
- return err;
+ kfree(cl);
+ cldev->cl = NULL;
+ mutex_unlock(&bus->device_lock);
+ return err;
}
EXPORT_SYMBOL_GPL(mei_cl_disable_device);
-void mei_cl_bus_rx_event(struct mei_cl *cl)
+/**
+ * mei_cl_device_find - find matching entry in the driver id table
+ *
+ * @cldev: me client device
+ * @cldrv: me client driver
+ *
+ * Return: id on success; NULL if no id is matching
+ */
+static const
+struct mei_cl_device_id *mei_cl_device_find(struct mei_cl_device *cldev,
+ struct mei_cl_driver *cldrv)
{
- struct mei_cl_device *device = cl->device;
+ const struct mei_cl_device_id *id;
+ const uuid_le *uuid;
+
+ uuid = mei_me_cl_uuid(cldev->me_cl);
+
+ id = cldrv->id_table;
+ while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) {
+ if (!uuid_le_cmp(*uuid, id->uuid)) {
+
+ if (!cldev->name[0])
+ return id;
+
+ if (!strncmp(cldev->name, id->name, sizeof(id->name)))
+ return id;
+ }
+
+ id++;
+ }
+
+ return NULL;
+}
+
+/**
+ * mei_cl_device_match - device match function
+ *
+ * @dev: device
+ * @drv: driver
+ *
+ * Return: 1 if matching device was found 0 otherwise
+ */
+static int mei_cl_device_match(struct device *dev, struct device_driver *drv)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct mei_cl_driver *cldrv = to_mei_cl_driver(drv);
+ const struct mei_cl_device_id *found_id;
+
+ if (!cldev)
+ return 0;
+
+ if (!cldev->do_match)
+ return 0;
+
+ if (!cldrv || !cldrv->id_table)
+ return 0;
+
+ found_id = mei_cl_device_find(cldev, cldrv);
+ if (found_id)
+ return 1;
+
+ return 0;
+}
+
+/**
+ * mei_cl_device_probe - bus probe function
+ *
+ * @dev: device
+ *
+ * Return: 0 on success; < 0 otherwise
+ */
+static int mei_cl_device_probe(struct device *dev)
+{
+ struct mei_cl_device *cldev;
+ struct mei_cl_driver *cldrv;
+ const struct mei_cl_device_id *id;
+
+ cldev = to_mei_cl_device(dev);
+ cldrv = to_mei_cl_driver(dev->driver);
+
+ if (!cldev)
+ return 0;
+
+ if (!cldrv || !cldrv->probe)
+ return -ENODEV;
+
+ id = mei_cl_device_find(cldev, cldrv);
+ if (!id)
+ return -ENODEV;
+
+ __module_get(THIS_MODULE);
+
+ return cldrv->probe(cldev, id);
+}
+
+/**
+ * mei_cl_device_remove - remove device from the bus
+ *
+ * @dev: device
+ *
+ * Return: 0 on success; < 0 otherwise
+ */
+static int mei_cl_device_remove(struct device *dev)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ struct mei_cl_driver *cldrv;
+ int ret = 0;
+
+ if (!cldev || !dev->driver)
+ return 0;
+
+ if (cldev->event_cb) {
+ cldev->event_cb = NULL;
+ cancel_work_sync(&cldev->event_work);
+ }
+
+ cldrv = to_mei_cl_driver(dev->driver);
+ if (cldrv->remove)
+ ret = cldrv->remove(cldev);
+
+ module_put(THIS_MODULE);
+ dev->driver = NULL;
+ return ret;
+
+}
+
+static ssize_t name_show(struct device *dev, struct device_attribute *a,
+ char *buf)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ size_t len;
+
+ len = snprintf(buf, PAGE_SIZE, "%s", cldev->name);
+
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
+ char *buf)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+ size_t len;
+
+ len = snprintf(buf, PAGE_SIZE, "%pUl", uuid);
+
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+static DEVICE_ATTR_RO(uuid);
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
+ char *buf)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+ size_t len;
+
+ len = snprintf(buf, PAGE_SIZE, "mei:%s:" MEI_CL_UUID_FMT ":",
+ cldev->name, MEI_CL_UUID_ARGS(uuid->b));
+
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *mei_cl_dev_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_uuid.attr,
+ &dev_attr_modalias.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(mei_cl_dev);
+
+/**
+ * mei_cl_device_uevent - me client bus uevent handler
+ *
+ * @dev: device
+ * @env: uevent kobject
+ *
+ * Return: 0 on success -ENOMEM on when add_uevent_var fails
+ */
+static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+ const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+
+ if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "MEI_CL_NAME=%s", cldev->name))
+ return -ENOMEM;
+
+ if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":",
+ cldev->name, MEI_CL_UUID_ARGS(uuid->b)))
+ return -ENOMEM;
- if (!device || !device->event_cb)
+ return 0;
+}
+
+static struct bus_type mei_cl_bus_type = {
+ .name = "mei",
+ .dev_groups = mei_cl_dev_groups,
+ .match = mei_cl_device_match,
+ .probe = mei_cl_device_probe,
+ .remove = mei_cl_device_remove,
+ .uevent = mei_cl_device_uevent,
+};
+
+static struct mei_device *mei_dev_bus_get(struct mei_device *bus)
+{
+ if (bus)
+ get_device(bus->dev);
+
+ return bus;
+}
+
+static void mei_dev_bus_put(struct mei_device *bus)
+{
+ if (bus)
+ put_device(bus->dev);
+}
+
+static void mei_cl_dev_release(struct device *dev)
+{
+ struct mei_cl_device *cldev = to_mei_cl_device(dev);
+
+ if (!cldev)
+ return;
+
+ mei_me_cl_put(cldev->me_cl);
+ mei_dev_bus_put(cldev->bus);
+ kfree(cldev);
+}
+
+static struct device_type mei_cl_device_type = {
+ .release = mei_cl_dev_release,
+};
+
+/**
+ * mei_cl_dev_alloc - initialize and allocate mei client device
+ *
+ * @bus: mei device
+ * @me_cl: me client
+ *
+ * Return: allocated device structur or NULL on allocation failure
+ */
+static struct mei_cl_device *mei_cl_dev_alloc(struct mei_device *bus,
+ struct mei_me_client *me_cl)
+{
+ struct mei_cl_device *cldev;
+
+ cldev = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
+ if (!cldev)
+ return NULL;
+
+ device_initialize(&cldev->dev);
+ cldev->dev.parent = bus->dev;
+ cldev->dev.bus = &mei_cl_bus_type;
+ cldev->dev.type = &mei_cl_device_type;
+ cldev->bus = mei_dev_bus_get(bus);
+ cldev->me_cl = mei_me_cl_get(me_cl);
+ cldev->is_added = 0;
+ INIT_LIST_HEAD(&cldev->bus_list);
+
+ return cldev;
+}
+
+/**
+ * mei_cl_dev_setup - setup me client device
+ * run fix up routines and set the device name
+ *
+ * @bus: mei device
+ * @cldev: me client device
+ *
+ * Return: true if the device is eligible for enumeration
+ */
+static bool mei_cl_dev_setup(struct mei_device *bus,
+ struct mei_cl_device *cldev)
+{
+ cldev->do_match = 1;
+ mei_cl_dev_fixup(cldev);
+
+ if (cldev->do_match)
+ dev_set_name(&cldev->dev, "mei:%s:%pUl",
+ cldev->name, mei_me_cl_uuid(cldev->me_cl));
+
+ return cldev->do_match == 1;
+}
+
+/**
+ * mei_cl_bus_dev_add - add me client devices
+ *
+ * @cldev: me client device
+ *
+ * Return: 0 on success; < 0 on failre
+ */
+static int mei_cl_bus_dev_add(struct mei_cl_device *cldev)
+{
+ int ret;
+
+ dev_dbg(cldev->bus->dev, "adding %pUL\n", mei_me_cl_uuid(cldev->me_cl));
+ ret = device_add(&cldev->dev);
+ if (!ret)
+ cldev->is_added = 1;
+
+ return ret;
+}
+
+/**
+ * mei_cl_bus_dev_stop - stop the driver
+ *
+ * @cldev: me client device
+ */
+static void mei_cl_bus_dev_stop(struct mei_cl_device *cldev)
+{
+ if (cldev->is_added)
+ device_release_driver(&cldev->dev);
+}
+
+/**
+ * mei_cl_bus_dev_destroy - destroy me client devices object
+ *
+ * @cldev: me client device
+ */
+static void mei_cl_bus_dev_destroy(struct mei_cl_device *cldev)
+{
+ if (!cldev->is_added)
+ return;
+
+ device_del(&cldev->dev);
+
+ mutex_lock(&cldev->bus->cl_bus_lock);
+ list_del_init(&cldev->bus_list);
+ mutex_unlock(&cldev->bus->cl_bus_lock);
+
+ cldev->is_added = 0;
+ put_device(&cldev->dev);
+}
+
+/**
+ * mei_cl_bus_remove_device - remove a devices form the bus
+ *
+ * @cldev: me client device
+ */
+static void mei_cl_bus_remove_device(struct mei_cl_device *cldev)
+{
+ mei_cl_bus_dev_stop(cldev);
+ mei_cl_bus_dev_destroy(cldev);
+}
+
+/**
+ * mei_cl_bus_remove_devices - remove all devices form the bus
+ *
+ * @bus: mei device
+ */
+void mei_cl_bus_remove_devices(struct mei_device *bus)
+{
+ struct mei_cl_device *cldev, *next;
+
+ list_for_each_entry_safe(cldev, next, &bus->device_list, bus_list)
+ mei_cl_bus_remove_device(cldev);
+}
+
+
+/**
+ * mei_cl_dev_init - allocate and initializes an mei client devices
+ * based on me client
+ *
+ * @bus: mei device
+ * @me_cl: me client
+ */
+static void mei_cl_dev_init(struct mei_device *bus, struct mei_me_client *me_cl)
+{
+ struct mei_cl_device *cldev;
+
+ dev_dbg(bus->dev, "initializing %pUl", mei_me_cl_uuid(me_cl));
+
+ if (me_cl->bus_added)
return;
- set_bit(MEI_CL_EVENT_RX, &device->events);
+ cldev = mei_cl_dev_alloc(bus, me_cl);
+ if (!cldev)
+ return;
+
+ mutex_lock(&cldev->bus->cl_bus_lock);
+ me_cl->bus_added = true;
+ list_add_tail(&cldev->bus_list, &bus->device_list);
+ mutex_unlock(&cldev->bus->cl_bus_lock);
+
+}
+
+/**
+ * mei_cl_bus_rescan - scan me clients list and add create
+ * devices for eligible clients
+ *
+ * @bus: mei device
+ */
+void mei_cl_bus_rescan(struct mei_device *bus)
+{
+ struct mei_cl_device *cldev, *n;
+ struct mei_me_client *me_cl;
+
+ down_read(&bus->me_clients_rwsem);
+ list_for_each_entry(me_cl, &bus->me_clients, list)
+ mei_cl_dev_init(bus, me_cl);
+ up_read(&bus->me_clients_rwsem);
+
+ mutex_lock(&bus->cl_bus_lock);
+ list_for_each_entry_safe(cldev, n, &bus->device_list, bus_list) {
+
+ if (!mei_me_cl_is_active(cldev->me_cl)) {
+ mei_cl_bus_remove_device(cldev);
+ continue;
+ }
+
+ if (cldev->is_added)
+ continue;
+
+ if (mei_cl_dev_setup(bus, cldev))
+ mei_cl_bus_dev_add(cldev);
+ else {
+ list_del_init(&cldev->bus_list);
+ put_device(&cldev->dev);
+ }
+ }
+ mutex_unlock(&bus->cl_bus_lock);
+
+ dev_dbg(bus->dev, "rescan end");
+}
+
+int __mei_cl_driver_register(struct mei_cl_driver *cldrv, struct module *owner)
+{
+ int err;
+
+ cldrv->driver.name = cldrv->name;
+ cldrv->driver.owner = owner;
+ cldrv->driver.bus = &mei_cl_bus_type;
+
+ err = driver_register(&cldrv->driver);
+ if (err)
+ return err;
- schedule_work(&device->event_work);
+ pr_debug("mei: driver [%s] registered\n", cldrv->driver.name);
+
+ return 0;
}
+EXPORT_SYMBOL_GPL(__mei_cl_driver_register);
+
+void mei_cl_driver_unregister(struct mei_cl_driver *cldrv)
+{
+ driver_unregister(&cldrv->driver);
+
+ pr_debug("mei: driver [%s] unregistered\n", cldrv->driver.name);
+}
+EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
+
int __init mei_cl_bus_init(void)
{
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 6decbe136..a6c87c713 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -555,10 +555,10 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
init_waitqueue_head(&cl->wait);
init_waitqueue_head(&cl->rx_wait);
init_waitqueue_head(&cl->tx_wait);
+ init_waitqueue_head(&cl->ev_wait);
INIT_LIST_HEAD(&cl->rd_completed);
INIT_LIST_HEAD(&cl->rd_pending);
INIT_LIST_HEAD(&cl->link);
- INIT_LIST_HEAD(&cl->device_link);
cl->writing_state = MEI_IDLE;
cl->state = MEI_FILE_INITIALIZING;
cl->dev = dev;
@@ -690,16 +690,12 @@ void mei_host_client_init(struct work_struct *work)
mei_wd_host_init(dev, me_cl);
mei_me_cl_put(me_cl);
- me_cl = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
- if (me_cl)
- mei_nfc_host_init(dev, me_cl);
- mei_me_cl_put(me_cl);
-
-
dev->dev_state = MEI_DEV_ENABLED;
dev->reset_count = 0;
mutex_unlock(&dev->device_lock);
+ mei_cl_bus_rescan(dev);
+
pm_runtime_mark_last_busy(dev->dev);
dev_dbg(dev->dev, "rpm: autosuspend\n");
pm_runtime_autosuspend(dev->dev);
@@ -841,45 +837,22 @@ int mei_cl_irq_disconnect(struct mei_cl *cl, struct mei_cl_cb *cb,
return ret;
}
-
-
/**
- * mei_cl_disconnect - disconnect host client from the me one
+ * __mei_cl_disconnect - disconnect host client from the me one
+ * internal function runtime pm has to be already acquired
*
* @cl: host client
*
- * Locking: called under "dev->device_lock" lock
- *
* Return: 0 on success, <0 on failure.
*/
-int mei_cl_disconnect(struct mei_cl *cl)
+static int __mei_cl_disconnect(struct mei_cl *cl)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
int rets;
- if (WARN_ON(!cl || !cl->dev))
- return -ENODEV;
-
dev = cl->dev;
- cl_dbg(dev, cl, "disconnecting");
-
- if (!mei_cl_is_connected(cl))
- return 0;
-
- if (mei_cl_is_fixed_address(cl)) {
- mei_cl_set_disconnected(cl);
- return 0;
- }
-
- rets = pm_runtime_get(dev->dev);
- if (rets < 0 && rets != -EINPROGRESS) {
- pm_runtime_put_noidle(dev->dev);
- cl_err(dev, cl, "rpm: get failed %d\n", rets);
- return rets;
- }
-
cl->state = MEI_FILE_DISCONNECTING;
cb = mei_io_cb_init(cl, MEI_FOP_DISCONNECT, NULL);
@@ -915,11 +888,52 @@ out:
if (!rets)
cl_dbg(dev, cl, "successfully disconnected from FW client.\n");
+ mei_io_cb_free(cb);
+ return rets;
+}
+
+/**
+ * mei_cl_disconnect - disconnect host client from the me one
+ *
+ * @cl: host client
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * Return: 0 on success, <0 on failure.
+ */
+int mei_cl_disconnect(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+ int rets;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ cl_dbg(dev, cl, "disconnecting");
+
+ if (!mei_cl_is_connected(cl))
+ return 0;
+
+ if (mei_cl_is_fixed_address(cl)) {
+ mei_cl_set_disconnected(cl);
+ return 0;
+ }
+
+ rets = pm_runtime_get(dev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(dev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
+ rets = __mei_cl_disconnect(cl);
+
cl_dbg(dev, cl, "rpm: autosuspend\n");
pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);
- mei_io_cb_free(cb);
return rets;
}
@@ -1064,11 +1078,23 @@ int mei_cl_connect(struct mei_cl *cl, struct mei_me_client *me_cl,
mutex_unlock(&dev->device_lock);
wait_event_timeout(cl->wait,
(cl->state == MEI_FILE_CONNECTED ||
+ cl->state == MEI_FILE_DISCONNECT_REQUIRED ||
cl->state == MEI_FILE_DISCONNECT_REPLY),
mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
mutex_lock(&dev->device_lock);
if (!mei_cl_is_connected(cl)) {
+ if (cl->state == MEI_FILE_DISCONNECT_REQUIRED) {
+ mei_io_list_flush(&dev->ctrl_rd_list, cl);
+ mei_io_list_flush(&dev->ctrl_wr_list, cl);
+ /* ignore disconnect return valuue;
+ * in case of failure reset will be invoked
+ */
+ __mei_cl_disconnect(cl);
+ rets = -EFAULT;
+ goto out;
+ }
+
/* timeout or something went really wrong */
if (!cl->status)
cl->status = -EFAULT;
@@ -1181,6 +1207,221 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
}
/**
+ * mei_cl_notify_fop2req - convert fop to proper request
+ *
+ * @fop: client notification start response command
+ *
+ * Return: MEI_HBM_NOTIFICATION_START/STOP
+ */
+u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop)
+{
+ if (fop == MEI_FOP_NOTIFY_START)
+ return MEI_HBM_NOTIFICATION_START;
+ else
+ return MEI_HBM_NOTIFICATION_STOP;
+}
+
+/**
+ * mei_cl_notify_req2fop - convert notification request top file operation type
+ *
+ * @req: hbm notification request type
+ *
+ * Return: MEI_FOP_NOTIFY_START/STOP
+ */
+enum mei_cb_file_ops mei_cl_notify_req2fop(u8 req)
+{
+ if (req == MEI_HBM_NOTIFICATION_START)
+ return MEI_FOP_NOTIFY_START;
+ else
+ return MEI_FOP_NOTIFY_STOP;
+}
+
+/**
+ * mei_cl_irq_notify - send notification request in irq_thread context
+ *
+ * @cl: client
+ * @cb: callback block.
+ * @cmpl_list: complete list.
+ *
+ * Return: 0 on such and error otherwise.
+ */
+int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list)
+{
+ struct mei_device *dev = cl->dev;
+ u32 msg_slots;
+ int slots;
+ int ret;
+ bool request;
+
+ msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request));
+ slots = mei_hbuf_empty_slots(dev);
+
+ if (slots < msg_slots)
+ return -EMSGSIZE;
+
+ request = mei_cl_notify_fop2req(cb->fop_type);
+ ret = mei_hbm_cl_notify_req(dev, cl, request);
+ if (ret) {
+ cl->status = ret;
+ list_move_tail(&cb->list, &cmpl_list->list);
+ return ret;
+ }
+
+ list_move_tail(&cb->list, &dev->ctrl_rd_list.list);
+ return 0;
+}
+
+/**
+ * mei_cl_notify_request - send notification stop/start request
+ *
+ * @cl: host client
+ * @file: associate request with file
+ * @request: 1 for start or 0 for stop
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * Return: 0 on such and error otherwise.
+ */
+int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request)
+{
+ struct mei_device *dev;
+ struct mei_cl_cb *cb;
+ enum mei_cb_file_ops fop_type;
+ int rets;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ if (!dev->hbm_f_ev_supported) {
+ cl_dbg(dev, cl, "notifications not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ rets = pm_runtime_get(dev->dev);
+ if (rets < 0 && rets != -EINPROGRESS) {
+ pm_runtime_put_noidle(dev->dev);
+ cl_err(dev, cl, "rpm: get failed %d\n", rets);
+ return rets;
+ }
+
+ fop_type = mei_cl_notify_req2fop(request);
+ cb = mei_io_cb_init(cl, fop_type, file);
+ if (!cb) {
+ rets = -ENOMEM;
+ goto out;
+ }
+
+ if (mei_hbuf_acquire(dev)) {
+ if (mei_hbm_cl_notify_req(dev, cl, request)) {
+ rets = -ENODEV;
+ goto out;
+ }
+ list_add_tail(&cb->list, &dev->ctrl_rd_list.list);
+ } else {
+ list_add_tail(&cb->list, &dev->ctrl_wr_list.list);
+ }
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(cl->wait, cl->notify_en == request,
+ mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT));
+ mutex_lock(&dev->device_lock);
+
+ if (cl->notify_en != request) {
+ mei_io_list_flush(&dev->ctrl_rd_list, cl);
+ mei_io_list_flush(&dev->ctrl_wr_list, cl);
+ if (!cl->status)
+ cl->status = -EFAULT;
+ }
+
+ rets = cl->status;
+
+out:
+ cl_dbg(dev, cl, "rpm: autosuspend\n");
+ pm_runtime_mark_last_busy(dev->dev);
+ pm_runtime_put_autosuspend(dev->dev);
+
+ mei_io_cb_free(cb);
+ return rets;
+}
+
+/**
+ * mei_cl_notify - raise notification
+ *
+ * @cl: host client
+ *
+ * Locking: called under "dev->device_lock" lock
+ */
+void mei_cl_notify(struct mei_cl *cl)
+{
+ struct mei_device *dev;
+
+ if (!cl || !cl->dev)
+ return;
+
+ dev = cl->dev;
+
+ if (!cl->notify_en)
+ return;
+
+ cl_dbg(dev, cl, "notify event");
+ cl->notify_ev = true;
+ wake_up_interruptible_all(&cl->ev_wait);
+
+ if (cl->ev_async)
+ kill_fasync(&cl->ev_async, SIGIO, POLL_PRI);
+
+ mei_cl_bus_notify_event(cl);
+}
+
+/**
+ * mei_cl_notify_get - get or wait for notification event
+ *
+ * @cl: host client
+ * @block: this request is blocking
+ * @notify_ev: true if notification event was received
+ *
+ * Locking: called under "dev->device_lock" lock
+ *
+ * Return: 0 on such and error otherwise.
+ */
+int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev)
+{
+ struct mei_device *dev;
+ int rets;
+
+ *notify_ev = false;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ if (!mei_cl_is_connected(cl))
+ return -ENODEV;
+
+ if (cl->notify_ev)
+ goto out;
+
+ if (!block)
+ return -EAGAIN;
+
+ mutex_unlock(&dev->device_lock);
+ rets = wait_event_interruptible(cl->ev_wait, cl->notify_ev);
+ mutex_lock(&dev->device_lock);
+
+ if (rets < 0)
+ return rets;
+
+out:
+ *notify_ev = cl->notify_ev;
+ cl->notify_ev = false;
+ return 0;
+}
+
+/**
* mei_cl_read_start - the start read client message function.
*
* @cl: host client
@@ -1356,6 +1597,7 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
struct mei_device *dev;
struct mei_msg_data *buf;
struct mei_msg_hdr mei_hdr;
+ int size;
int rets;
@@ -1367,10 +1609,10 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
dev = cl->dev;
-
buf = &cb->buf;
+ size = buf->size;
- cl_dbg(dev, cl, "size=%d\n", buf->size);
+ cl_dbg(dev, cl, "size=%d\n", size);
rets = pm_runtime_get(dev->dev);
if (rets < 0 && rets != -EINPROGRESS) {
@@ -1394,21 +1636,21 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking)
if (rets == 0) {
cl_dbg(dev, cl, "No flow control credentials: not sending.\n");
- rets = buf->size;
+ rets = size;
goto out;
}
if (!mei_hbuf_acquire(dev)) {
cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n");
- rets = buf->size;
+ rets = size;
goto out;
}
/* Check for a maximum length */
- if (buf->size > mei_hbuf_max_len(dev)) {
+ if (size > mei_hbuf_max_len(dev)) {
mei_hdr.length = mei_hbuf_max_len(dev);
mei_hdr.msg_complete = 0;
} else {
- mei_hdr.length = buf->size;
+ mei_hdr.length = size;
mei_hdr.msg_complete = 1;
}
@@ -1430,6 +1672,7 @@ out:
else
list_add_tail(&cb->list, &dev->write_list.list);
+ cb = NULL;
if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) {
mutex_unlock(&dev->device_lock);
@@ -1444,7 +1687,7 @@ out:
}
}
- rets = buf->size;
+ rets = size;
err:
cl_dbg(dev, cl, "rpm: autosuspend\n");
pm_runtime_mark_last_busy(dev->dev);
@@ -1486,6 +1729,8 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb)
case MEI_FOP_CONNECT:
case MEI_FOP_DISCONNECT:
+ case MEI_FOP_NOTIFY_STOP:
+ case MEI_FOP_NOTIFY_START:
if (waitqueue_active(&cl->wait))
wake_up(&cl->wait);
@@ -1528,6 +1773,12 @@ void mei_cl_all_wakeup(struct mei_device *dev)
cl_dbg(dev, cl, "Waking up writing client!\n");
wake_up_interruptible(&cl->tx_wait);
}
+
+ /* synchronized under device mutex */
+ if (waitqueue_active(&cl->ev_wait)) {
+ cl_dbg(dev, cl, "Waking up waiting for event clients!\n");
+ wake_up_interruptible(&cl->ev_wait);
+ }
}
}
diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
index 8d7f057f1..1c7cad07d 100644
--- a/drivers/misc/mei/client.h
+++ b/drivers/misc/mei/client.h
@@ -219,6 +219,14 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
void mei_host_client_init(struct work_struct *work);
+u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop);
+enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request);
+int mei_cl_notify_request(struct mei_cl *cl, struct file *file, u8 request);
+int mei_cl_irq_notify(struct mei_cl *cl, struct mei_cl_cb *cb,
+ struct mei_cl_cb *cmpl_list);
+int mei_cl_notify_get(struct mei_cl *cl, bool block, bool *notify_ev);
+void mei_cl_notify(struct mei_cl *cl);
+
void mei_cl_all_disconnect(struct mei_device *dev);
void mei_cl_all_wakeup(struct mei_device *dev);
void mei_cl_all_write_clear(struct mei_device *dev);
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
index eb8683412..8504dbeac 100644
--- a/drivers/misc/mei/debugfs.c
+++ b/drivers/misc/mei/debugfs.c
@@ -154,6 +154,12 @@ static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
pos += scnprintf(buf + pos, bufsz - pos, "hbm features:\n");
pos += scnprintf(buf + pos, bufsz - pos, "\tPG: %01d\n",
dev->hbm_f_pg_supported);
+ pos += scnprintf(buf + pos, bufsz - pos, "\tDC: %01d\n",
+ dev->hbm_f_dc_supported);
+ pos += scnprintf(buf + pos, bufsz - pos, "\tDOT: %01d\n",
+ dev->hbm_f_dot_supported);
+ pos += scnprintf(buf + pos, bufsz - pos, "\tEV: %01d\n",
+ dev->hbm_f_ev_supported);
}
pos += scnprintf(buf + pos, bufsz - pos, "pg: %s, %s\n",
@@ -198,6 +204,8 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name)
if (!dir)
return -ENOMEM;
+ dev->dbgfs_dir = dir;
+
f = debugfs_create_file("meclients", S_IRUSR, dir,
dev, &mei_dbgfs_fops_meclients);
if (!f) {
@@ -222,7 +230,6 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name)
dev_err(dev->dev, "allow_fixed_address: registration failed\n");
goto err;
}
- dev->dbgfs_dir = dir;
return 0;
err:
mei_dbgfs_deregister(dev);
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index a4f283165..6d7c188fb 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -52,6 +52,7 @@ static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status)
MEI_CL_CS(ALREADY_STARTED);
MEI_CL_CS(OUT_OF_RESOURCES);
MEI_CL_CS(MESSAGE_SMALL);
+ MEI_CL_CS(NOT_ALLOWED);
default: return "unknown";
}
#undef MEI_CL_CCS
@@ -89,6 +90,7 @@ static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status)
case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY;
case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY;
case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL;
+ case MEI_CL_CONN_NOT_ALLOWED: return -EBUSY;
default: return -EINVAL;
}
}
@@ -299,6 +301,7 @@ static int mei_hbm_enum_clients_req(struct mei_device *dev)
enum_req = (struct hbm_host_enum_request *)dev->wr_msg.data;
memset(enum_req, 0, len);
enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
+ enum_req->allow_add = dev->hbm_f_dc_supported;
ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
if (ret) {
@@ -344,6 +347,180 @@ static int mei_hbm_me_cl_add(struct mei_device *dev,
}
/**
+ * mei_hbm_add_cl_resp - send response to fw on client add request
+ *
+ * @dev: the device structure
+ * @addr: me address
+ * @status: response status
+ *
+ * Return: 0 on success and < 0 on failure
+ */
+static int mei_hbm_add_cl_resp(struct mei_device *dev, u8 addr, u8 status)
+{
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_add_client_response *resp;
+ const size_t len = sizeof(struct hbm_add_client_response);
+ int ret;
+
+ dev_dbg(dev->dev, "adding client response\n");
+
+ resp = (struct hbm_add_client_response *)dev->wr_msg.data;
+
+ mei_hbm_hdr(mei_hdr, len);
+ memset(resp, 0, sizeof(struct hbm_add_client_response));
+
+ resp->hbm_cmd = MEI_HBM_ADD_CLIENT_RES_CMD;
+ resp->me_addr = addr;
+ resp->status = status;
+
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret)
+ dev_err(dev->dev, "add client response write failed: ret = %d\n",
+ ret);
+ return ret;
+}
+
+/**
+ * mei_hbm_fw_add_cl_req - request from the fw to add a client
+ *
+ * @dev: the device structure
+ * @req: add client request
+ *
+ * Return: 0 on success and < 0 on failure
+ */
+static int mei_hbm_fw_add_cl_req(struct mei_device *dev,
+ struct hbm_add_client_request *req)
+{
+ int ret;
+ u8 status = MEI_HBMS_SUCCESS;
+
+ BUILD_BUG_ON(sizeof(struct hbm_add_client_request) !=
+ sizeof(struct hbm_props_response));
+
+ ret = mei_hbm_me_cl_add(dev, (struct hbm_props_response *)req);
+ if (ret)
+ status = !MEI_HBMS_SUCCESS;
+
+ return mei_hbm_add_cl_resp(dev, req->me_addr, status);
+}
+
+/**
+ * mei_hbm_cl_notify_req - send notification request
+ *
+ * @dev: the device structure
+ * @cl: a client to disconnect from
+ * @start: true for start false for stop
+ *
+ * Return: 0 on success and -EIO on write failure
+ */
+int mei_hbm_cl_notify_req(struct mei_device *dev,
+ struct mei_cl *cl, u8 start)
+{
+
+ struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
+ struct hbm_notification_request *req;
+ const size_t len = sizeof(struct hbm_notification_request);
+ int ret;
+
+ mei_hbm_hdr(mei_hdr, len);
+ mei_hbm_cl_hdr(cl, MEI_HBM_NOTIFY_REQ_CMD, dev->wr_msg.data, len);
+
+ req = (struct hbm_notification_request *)dev->wr_msg.data;
+ req->start = start;
+
+ ret = mei_write_message(dev, mei_hdr, dev->wr_msg.data);
+ if (ret)
+ dev_err(dev->dev, "notify request failed: ret = %d\n", ret);
+
+ return ret;
+}
+
+/**
+ * notify_res_to_fop - convert notification response to the proper
+ * notification FOP
+ *
+ * @cmd: client notification start response command
+ *
+ * Return: MEI_FOP_NOTIFY_START or MEI_FOP_NOTIFY_STOP;
+ */
+static inline enum mei_cb_file_ops notify_res_to_fop(struct mei_hbm_cl_cmd *cmd)
+{
+ struct hbm_notification_response *rs =
+ (struct hbm_notification_response *)cmd;
+
+ return mei_cl_notify_req2fop(rs->start);
+}
+
+/**
+ * mei_hbm_cl_notify_start_res - update the client state according
+ * notify start response
+ *
+ * @dev: the device structure
+ * @cl: mei host client
+ * @cmd: client notification start response command
+ */
+static void mei_hbm_cl_notify_start_res(struct mei_device *dev,
+ struct mei_cl *cl,
+ struct mei_hbm_cl_cmd *cmd)
+{
+ struct hbm_notification_response *rs =
+ (struct hbm_notification_response *)cmd;
+
+ cl_dbg(dev, cl, "hbm: notify start response status=%d\n", rs->status);
+
+ if (rs->status == MEI_HBMS_SUCCESS ||
+ rs->status == MEI_HBMS_ALREADY_STARTED) {
+ cl->notify_en = true;
+ cl->status = 0;
+ } else {
+ cl->status = -EINVAL;
+ }
+}
+
+/**
+ * mei_hbm_cl_notify_stop_res - update the client state according
+ * notify stop response
+ *
+ * @dev: the device structure
+ * @cl: mei host client
+ * @cmd: client notification stop response command
+ */
+static void mei_hbm_cl_notify_stop_res(struct mei_device *dev,
+ struct mei_cl *cl,
+ struct mei_hbm_cl_cmd *cmd)
+{
+ struct hbm_notification_response *rs =
+ (struct hbm_notification_response *)cmd;
+
+ cl_dbg(dev, cl, "hbm: notify stop response status=%d\n", rs->status);
+
+ if (rs->status == MEI_HBMS_SUCCESS ||
+ rs->status == MEI_HBMS_NOT_STARTED) {
+ cl->notify_en = false;
+ cl->status = 0;
+ } else {
+ /* TODO: spec is not clear yet about other possible issues */
+ cl->status = -EINVAL;
+ }
+}
+
+/**
+ * mei_hbm_cl_notify - signal notification event
+ *
+ * @dev: the device structure
+ * @cmd: notification client message
+ */
+static void mei_hbm_cl_notify(struct mei_device *dev,
+ struct mei_hbm_cl_cmd *cmd)
+{
+ struct mei_cl *cl;
+
+ cl = mei_hbm_cl_find_by_cmd(dev, cmd);
+ if (cl)
+ mei_cl_notify(cl);
+}
+
+/**
* mei_hbm_prop_req - request property for a single client
*
* @dev: the device structure
@@ -610,8 +787,11 @@ static void mei_hbm_cl_connect_res(struct mei_device *dev, struct mei_cl *cl,
if (rs->status == MEI_CL_CONN_SUCCESS)
cl->state = MEI_FILE_CONNECTED;
- else
+ else {
cl->state = MEI_FILE_DISCONNECT_REPLY;
+ if (rs->status == MEI_CL_CONN_NOT_FOUND)
+ mei_me_cl_del(dev, cl->me_cl);
+ }
cl->status = mei_cl_conn_status_to_errno(rs->status);
}
@@ -654,6 +834,12 @@ static void mei_hbm_cl_res(struct mei_device *dev,
case MEI_FOP_DISCONNECT:
mei_hbm_cl_disconnect_res(dev, cl, rs);
break;
+ case MEI_FOP_NOTIFY_START:
+ mei_hbm_cl_notify_start_res(dev, cl, rs);
+ break;
+ case MEI_FOP_NOTIFY_STOP:
+ mei_hbm_cl_notify_stop_res(dev, cl, rs);
+ break;
default:
return;
}
@@ -694,6 +880,79 @@ static int mei_hbm_fw_disconnect_req(struct mei_device *dev,
}
/**
+ * mei_hbm_pg_enter_res - PG enter response received
+ *
+ * @dev: the device structure.
+ *
+ * Return: 0 on success, -EPROTO on state mismatch
+ */
+static int mei_hbm_pg_enter_res(struct mei_device *dev)
+{
+ if (mei_pg_state(dev) != MEI_PG_OFF ||
+ dev->pg_event != MEI_PG_EVENT_WAIT) {
+ dev_err(dev->dev, "hbm: pg entry response: state mismatch [%s, %d]\n",
+ mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
+ return -EPROTO;
+ }
+
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ wake_up(&dev->wait_pg);
+
+ return 0;
+}
+
+/**
+ * mei_hbm_pg_resume - process with PG resume
+ *
+ * @dev: the device structure.
+ */
+void mei_hbm_pg_resume(struct mei_device *dev)
+{
+ pm_request_resume(dev->dev);
+}
+EXPORT_SYMBOL_GPL(mei_hbm_pg_resume);
+
+/**
+ * mei_hbm_pg_exit_res - PG exit response received
+ *
+ * @dev: the device structure.
+ *
+ * Return: 0 on success, -EPROTO on state mismatch
+ */
+static int mei_hbm_pg_exit_res(struct mei_device *dev)
+{
+ if (mei_pg_state(dev) != MEI_PG_ON ||
+ (dev->pg_event != MEI_PG_EVENT_WAIT &&
+ dev->pg_event != MEI_PG_EVENT_IDLE)) {
+ dev_err(dev->dev, "hbm: pg exit response: state mismatch [%s, %d]\n",
+ mei_pg_state_str(mei_pg_state(dev)), dev->pg_event);
+ return -EPROTO;
+ }
+
+ switch (dev->pg_event) {
+ case MEI_PG_EVENT_WAIT:
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ wake_up(&dev->wait_pg);
+ break;
+ case MEI_PG_EVENT_IDLE:
+ /*
+ * If the driver is not waiting on this then
+ * this is HW initiated exit from PG.
+ * Start runtime pm resume sequence to exit from PG.
+ */
+ dev->pg_event = MEI_PG_EVENT_RECEIVED;
+ mei_hbm_pg_resume(dev);
+ break;
+ default:
+ WARN(1, "hbm: pg exit response: unexpected pg event = %d\n",
+ dev->pg_event);
+ return -EPROTO;
+ }
+
+ return 0;
+}
+
+/**
* mei_hbm_config_features - check what hbm features and commands
* are supported by the fw
*
@@ -709,6 +968,17 @@ static void mei_hbm_config_features(struct mei_device *dev)
if (dev->version.major_version == HBM_MAJOR_VERSION_PGI &&
dev->version.minor_version >= HBM_MINOR_VERSION_PGI)
dev->hbm_f_pg_supported = 1;
+
+ if (dev->version.major_version >= HBM_MAJOR_VERSION_DC)
+ dev->hbm_f_dc_supported = 1;
+
+ /* disconnect on connect timeout instead of link reset */
+ if (dev->version.major_version >= HBM_MAJOR_VERSION_DOT)
+ dev->hbm_f_dot_supported = 1;
+
+ /* Notification Event Support */
+ if (dev->version.major_version >= HBM_MAJOR_VERSION_EV)
+ dev->hbm_f_ev_supported = 1;
}
/**
@@ -740,6 +1010,8 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
struct hbm_host_version_response *version_res;
struct hbm_props_response *props_res;
struct hbm_host_enum_response *enum_res;
+ struct hbm_add_client_request *add_cl_req;
+ int ret;
struct mei_hbm_cl_cmd *cl_cmd;
struct hbm_client_connect_request *disconnect_req;
@@ -828,24 +1100,17 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
break;
case MEI_PG_ISOLATION_ENTRY_RES_CMD:
- dev_dbg(dev->dev, "power gate isolation entry response received\n");
- dev->pg_event = MEI_PG_EVENT_RECEIVED;
- if (waitqueue_active(&dev->wait_pg))
- wake_up(&dev->wait_pg);
+ dev_dbg(dev->dev, "hbm: power gate isolation entry response received\n");
+ ret = mei_hbm_pg_enter_res(dev);
+ if (ret)
+ return ret;
break;
case MEI_PG_ISOLATION_EXIT_REQ_CMD:
- dev_dbg(dev->dev, "power gate isolation exit request received\n");
- dev->pg_event = MEI_PG_EVENT_RECEIVED;
- if (waitqueue_active(&dev->wait_pg))
- wake_up(&dev->wait_pg);
- else
- /*
- * If the driver is not waiting on this then
- * this is HW initiated exit from PG.
- * Start runtime pm resume sequence to exit from PG.
- */
- pm_request_resume(dev->dev);
+ dev_dbg(dev->dev, "hbm: power gate isolation exit request received\n");
+ ret = mei_hbm_pg_exit_res(dev);
+ if (ret)
+ return ret;
break;
case HOST_CLIENT_PROPERTIES_RES_CMD:
@@ -937,6 +1202,39 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
return -EIO;
}
break;
+
+ case MEI_HBM_ADD_CLIENT_REQ_CMD:
+ dev_dbg(dev->dev, "hbm: add client request received\n");
+ /*
+ * after the host receives the enum_resp
+ * message clients may be added or removed
+ */
+ if (dev->hbm_state <= MEI_HBM_ENUM_CLIENTS ||
+ dev->hbm_state >= MEI_HBM_STOPPED) {
+ dev_err(dev->dev, "hbm: add client: state mismatch, [%d, %d]\n",
+ dev->dev_state, dev->hbm_state);
+ return -EPROTO;
+ }
+ add_cl_req = (struct hbm_add_client_request *)mei_msg;
+ ret = mei_hbm_fw_add_cl_req(dev, add_cl_req);
+ if (ret) {
+ dev_err(dev->dev, "hbm: add client: failed to send response %d\n",
+ ret);
+ return -EIO;
+ }
+ dev_dbg(dev->dev, "hbm: add client request processed\n");
+ break;
+
+ case MEI_HBM_NOTIFY_RES_CMD:
+ dev_dbg(dev->dev, "hbm: notify response received\n");
+ mei_hbm_cl_res(dev, cl_cmd, notify_res_to_fop(cl_cmd));
+ break;
+
+ case MEI_HBM_NOTIFICATION_CMD:
+ dev_dbg(dev->dev, "hbm: notification\n");
+ mei_hbm_cl_notify(dev, cl_cmd);
+ break;
+
default:
BUG();
break;
diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h
index 2544db7d1..a2025a508 100644
--- a/drivers/misc/mei/hbm.h
+++ b/drivers/misc/mei/hbm.h
@@ -54,6 +54,9 @@ int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
bool mei_hbm_version_is_supported(struct mei_device *dev);
int mei_hbm_pg(struct mei_device *dev, u8 pg_cmd);
+void mei_hbm_pg_resume(struct mei_device *dev);
+int mei_hbm_cl_notify_req(struct mei_device *dev,
+ struct mei_cl *cl, u8 request);
#endif /* _MEI_HBM_H_ */
diff --git a/drivers/misc/mei/hw-me-regs.h b/drivers/misc/mei/hw-me-regs.h
index 9eb7ed70a..a8a68acd3 100644
--- a/drivers/misc/mei/hw-me-regs.h
+++ b/drivers/misc/mei/hw-me-regs.h
@@ -117,12 +117,17 @@
#define MEI_DEV_ID_WPT_LP 0x9CBA /* Wildcat Point LP */
#define MEI_DEV_ID_WPT_LP_2 0x9CBB /* Wildcat Point LP 2 */
+#define MEI_DEV_ID_SPT 0x9D3A /* Sunrise Point */
+#define MEI_DEV_ID_SPT_2 0x9D3B /* Sunrise Point 2 */
+#define MEI_DEV_ID_SPT_H 0xA13A /* Sunrise Point H */
+#define MEI_DEV_ID_SPT_H_2 0xA13B /* Sunrise Point H 2 */
/*
* MEI HW Section
*/
/* Host Firmware Status Registers in PCI Config Space */
#define PCI_CFG_HFS_1 0x40
+# define PCI_CFG_HFS_1_D0I3_MSK 0x80000000
#define PCI_CFG_HFS_2 0x48
#define PCI_CFG_HFS_3 0x60
#define PCI_CFG_HFS_4 0x64
@@ -140,7 +145,8 @@
#define ME_CSR_HA 0xC
/* H_HGC_CSR - PGI register */
#define H_HPG_CSR 0x10
-
+/* H_D0I3C - D0I3 Control */
+#define H_D0I3C 0x800
/* register bits of H_CSR (Host Control Status register) */
/* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
@@ -159,7 +165,14 @@
#define H_IS 0x00000002
/* Host Interrupt Enable */
#define H_IE 0x00000001
+/* Host D0I3 Interrupt Enable */
+#define H_D0I3C_IE 0x00000020
+/* Host D0I3 Interrupt Status */
+#define H_D0I3C_IS 0x00000040
+/* H_CSR masks */
+#define H_CSR_IE_MASK (H_IE | H_D0I3C_IE)
+#define H_CSR_IS_MASK (H_IS | H_D0I3C_IS)
/* register bits of ME_CSR_HA (ME Control Status Host Access register) */
/* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only
@@ -183,8 +196,14 @@ access to ME_CBD */
#define ME_IE_HRA 0x00000001
-/* register bits - H_HPG_CSR */
-#define H_HPG_CSR_PGIHEXR 0x00000001
-#define H_HPG_CSR_PGI 0x00000002
+/* H_HPG_CSR register bits */
+#define H_HPG_CSR_PGIHEXR 0x00000001
+#define H_HPG_CSR_PGI 0x00000002
+
+/* H_D0I3C register bits */
+#define H_D0I3C_CIP 0x00000001
+#define H_D0I3C_IR 0x00000002
+#define H_D0I3C_I3 0x00000004
+#define H_D0I3C_RR 0x00000008
#endif /* _MEI_HW_MEI_REGS_H_ */
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 43d7101ff..65511d39d 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -134,11 +134,40 @@ static inline void mei_hcsr_write(struct mei_device *dev, u32 reg)
*/
static inline void mei_hcsr_set(struct mei_device *dev, u32 reg)
{
- reg &= ~H_IS;
+ reg &= ~H_CSR_IS_MASK;
mei_hcsr_write(dev, reg);
}
/**
+ * mei_me_d0i3c_read - Reads 32bit data from the D0I3C register
+ *
+ * @dev: the device structure
+ *
+ * Return: H_D0I3C register value (u32)
+ */
+static inline u32 mei_me_d0i3c_read(const struct mei_device *dev)
+{
+ u32 reg;
+
+ reg = mei_me_reg_read(to_me_hw(dev), H_D0I3C);
+ trace_mei_reg_read(dev->dev, "H_D0I3C", H_CSR, reg);
+
+ return reg;
+}
+
+/**
+ * mei_me_d0i3c_write - writes H_D0I3C register to device
+ *
+ * @dev: the device structure
+ * @reg: new register value
+ */
+static inline void mei_me_d0i3c_write(struct mei_device *dev, u32 reg)
+{
+ trace_mei_reg_write(dev->dev, "H_D0I3C", H_CSR, reg);
+ mei_me_reg_write(to_me_hw(dev), H_D0I3C, reg);
+}
+
+/**
* mei_me_fw_status - read fw status register from pci config space
*
* @dev: mei device
@@ -176,12 +205,25 @@ static int mei_me_fw_status(struct mei_device *dev,
*/
static void mei_me_hw_config(struct mei_device *dev)
{
+ struct pci_dev *pdev = to_pci_dev(dev->dev);
struct mei_me_hw *hw = to_me_hw(dev);
- u32 hcsr = mei_hcsr_read(dev);
+ u32 hcsr, reg;
+
/* Doesn't change in runtime */
+ hcsr = mei_hcsr_read(dev);
dev->hbuf_depth = (hcsr & H_CBD) >> 24;
+ reg = 0;
+ pci_read_config_dword(pdev, PCI_CFG_HFS_1, &reg);
+ hw->d0i3_supported =
+ ((reg & PCI_CFG_HFS_1_D0I3_MSK) == PCI_CFG_HFS_1_D0I3_MSK);
+
hw->pg_state = MEI_PG_OFF;
+ if (hw->d0i3_supported) {
+ reg = mei_me_d0i3c_read(dev);
+ if (reg & H_D0I3C_I3)
+ hw->pg_state = MEI_PG_ON;
+ }
}
/**
@@ -208,7 +250,7 @@ static void mei_me_intr_clear(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
- if ((hcsr & H_IS) == H_IS)
+ if (hcsr & H_CSR_IS_MASK)
mei_hcsr_write(dev, hcsr);
}
/**
@@ -220,7 +262,7 @@ static void mei_me_intr_enable(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
- hcsr |= H_IE;
+ hcsr |= H_CSR_IE_MASK;
mei_hcsr_set(dev, hcsr);
}
@@ -233,7 +275,7 @@ static void mei_me_intr_disable(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
- hcsr &= ~H_IE;
+ hcsr &= ~H_CSR_IE_MASK;
mei_hcsr_set(dev, hcsr);
}
@@ -253,57 +295,6 @@ static void mei_me_hw_reset_release(struct mei_device *dev)
/* complete this write before we set host ready on another CPU */
mmiowb();
}
-/**
- * mei_me_hw_reset - resets fw via mei csr register.
- *
- * @dev: the device structure
- * @intr_enable: if interrupt should be enabled after reset.
- *
- * Return: always 0
- */
-static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
-{
- u32 hcsr = mei_hcsr_read(dev);
-
- /* H_RST may be found lit before reset is started,
- * for example if preceding reset flow hasn't completed.
- * In that case asserting H_RST will be ignored, therefore
- * we need to clean H_RST bit to start a successful reset sequence.
- */
- if ((hcsr & H_RST) == H_RST) {
- dev_warn(dev->dev, "H_RST is set = 0x%08X", hcsr);
- hcsr &= ~H_RST;
- mei_hcsr_set(dev, hcsr);
- hcsr = mei_hcsr_read(dev);
- }
-
- hcsr |= H_RST | H_IG | H_IS;
-
- if (intr_enable)
- hcsr |= H_IE;
- else
- hcsr &= ~H_IE;
-
- dev->recvd_hw_ready = false;
- mei_hcsr_write(dev, hcsr);
-
- /*
- * Host reads the H_CSR once to ensure that the
- * posted write to H_CSR completes.
- */
- hcsr = mei_hcsr_read(dev);
-
- if ((hcsr & H_RST) == 0)
- dev_warn(dev->dev, "H_RST is not set = 0x%08X", hcsr);
-
- if ((hcsr & H_RDY) == H_RDY)
- dev_warn(dev->dev, "H_RDY is not cleared 0x%08X", hcsr);
-
- if (intr_enable == false)
- mei_me_hw_reset_release(dev);
-
- return 0;
-}
/**
* mei_me_host_set_ready - enable device
@@ -314,7 +305,7 @@ static void mei_me_host_set_ready(struct mei_device *dev)
{
u32 hcsr = mei_hcsr_read(dev);
- hcsr |= H_IE | H_IG | H_RDY;
+ hcsr |= H_CSR_IE_MASK | H_IG | H_RDY;
mei_hcsr_set(dev, hcsr);
}
@@ -601,13 +592,13 @@ static void mei_me_pg_unset(struct mei_device *dev)
}
/**
- * mei_me_pg_enter_sync - perform pg entry procedure
+ * mei_me_pg_legacy_enter_sync - perform legacy pg entry procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
-int mei_me_pg_enter_sync(struct mei_device *dev)
+static int mei_me_pg_legacy_enter_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
@@ -638,13 +629,13 @@ int mei_me_pg_enter_sync(struct mei_device *dev)
}
/**
- * mei_me_pg_exit_sync - perform pg exit procedure
+ * mei_me_pg_legacy_exit_sync - perform legacy pg exit procedure
*
* @dev: the device structure
*
* Return: 0 on success an error code otherwise
*/
-int mei_me_pg_exit_sync(struct mei_device *dev)
+static int mei_me_pg_legacy_exit_sync(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
unsigned long timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
@@ -712,8 +703,12 @@ static bool mei_me_pg_in_transition(struct mei_device *dev)
*/
static bool mei_me_pg_is_enabled(struct mei_device *dev)
{
+ struct mei_me_hw *hw = to_me_hw(dev);
u32 reg = mei_me_mecsr_read(dev);
+ if (hw->d0i3_supported)
+ return true;
+
if ((reg & ME_PGIC_HRA) == 0)
goto notsupported;
@@ -723,7 +718,8 @@ static bool mei_me_pg_is_enabled(struct mei_device *dev)
return true;
notsupported:
- dev_dbg(dev->dev, "pg: not supported: HGP = %d hbm version %d.%d ?= %d.%d\n",
+ dev_dbg(dev->dev, "pg: not supported: d0i3 = %d HGP = %d hbm version %d.%d ?= %d.%d\n",
+ hw->d0i3_supported,
!!(reg & ME_PGIC_HRA),
dev->version.major_version,
dev->version.minor_version,
@@ -734,11 +730,211 @@ notsupported:
}
/**
- * mei_me_pg_intr - perform pg processing in interrupt thread handler
+ * mei_me_d0i3_set - write d0i3 register bit on mei device.
*
* @dev: the device structure
+ * @intr: ask for interrupt
+ *
+ * Return: D0I3C register value
*/
-static void mei_me_pg_intr(struct mei_device *dev)
+static u32 mei_me_d0i3_set(struct mei_device *dev, bool intr)
+{
+ u32 reg = mei_me_d0i3c_read(dev);
+
+ reg |= H_D0I3C_I3;
+ if (intr)
+ reg |= H_D0I3C_IR;
+ else
+ reg &= ~H_D0I3C_IR;
+ mei_me_d0i3c_write(dev, reg);
+ /* read it to ensure HW consistency */
+ reg = mei_me_d0i3c_read(dev);
+ return reg;
+}
+
+/**
+ * mei_me_d0i3_unset - clean d0i3 register bit on mei device.
+ *
+ * @dev: the device structure
+ *
+ * Return: D0I3C register value
+ */
+static u32 mei_me_d0i3_unset(struct mei_device *dev)
+{
+ u32 reg = mei_me_d0i3c_read(dev);
+
+ reg &= ~H_D0I3C_I3;
+ reg |= H_D0I3C_IR;
+ mei_me_d0i3c_write(dev, reg);
+ /* read it to ensure HW consistency */
+ reg = mei_me_d0i3c_read(dev);
+ return reg;
+}
+
+/**
+ * mei_me_d0i3_enter_sync - perform d0i3 entry procedure
+ *
+ * @dev: the device structure
+ *
+ * Return: 0 on success an error code otherwise
+ */
+static int mei_me_d0i3_enter_sync(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ unsigned long d0i3_timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
+ unsigned long pgi_timeout = mei_secs_to_jiffies(MEI_PGI_TIMEOUT);
+ int ret;
+ u32 reg;
+
+ reg = mei_me_d0i3c_read(dev);
+ if (reg & H_D0I3C_I3) {
+ /* we are in d0i3, nothing to do */
+ dev_dbg(dev->dev, "d0i3 set not needed\n");
+ ret = 0;
+ goto on;
+ }
+
+ /* PGI entry procedure */
+ dev->pg_event = MEI_PG_EVENT_WAIT;
+
+ ret = mei_hbm_pg(dev, MEI_PG_ISOLATION_ENTRY_REQ_CMD);
+ if (ret)
+ /* FIXME: should we reset here? */
+ goto out;
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(dev->wait_pg,
+ dev->pg_event == MEI_PG_EVENT_RECEIVED, pgi_timeout);
+ mutex_lock(&dev->device_lock);
+
+ if (dev->pg_event != MEI_PG_EVENT_RECEIVED) {
+ ret = -ETIME;
+ goto out;
+ }
+ /* end PGI entry procedure */
+
+ dev->pg_event = MEI_PG_EVENT_INTR_WAIT;
+
+ reg = mei_me_d0i3_set(dev, true);
+ if (!(reg & H_D0I3C_CIP)) {
+ dev_dbg(dev->dev, "d0i3 enter wait not needed\n");
+ ret = 0;
+ goto on;
+ }
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(dev->wait_pg,
+ dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, d0i3_timeout);
+ mutex_lock(&dev->device_lock);
+
+ if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
+ reg = mei_me_d0i3c_read(dev);
+ if (!(reg & H_D0I3C_I3)) {
+ ret = -ETIME;
+ goto out;
+ }
+ }
+
+ ret = 0;
+on:
+ hw->pg_state = MEI_PG_ON;
+out:
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ dev_dbg(dev->dev, "d0i3 enter ret = %d\n", ret);
+ return ret;
+}
+
+/**
+ * mei_me_d0i3_enter - perform d0i3 entry procedure
+ * no hbm PG handshake
+ * no waiting for confirmation; runs with interrupts
+ * disabled
+ *
+ * @dev: the device structure
+ *
+ * Return: 0 on success an error code otherwise
+ */
+static int mei_me_d0i3_enter(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 reg;
+
+ reg = mei_me_d0i3c_read(dev);
+ if (reg & H_D0I3C_I3) {
+ /* we are in d0i3, nothing to do */
+ dev_dbg(dev->dev, "already d0i3 : set not needed\n");
+ goto on;
+ }
+
+ mei_me_d0i3_set(dev, false);
+on:
+ hw->pg_state = MEI_PG_ON;
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+ dev_dbg(dev->dev, "d0i3 enter\n");
+ return 0;
+}
+
+/**
+ * mei_me_d0i3_exit_sync - perform d0i3 exit procedure
+ *
+ * @dev: the device structure
+ *
+ * Return: 0 on success an error code otherwise
+ */
+static int mei_me_d0i3_exit_sync(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ unsigned long timeout = mei_secs_to_jiffies(MEI_D0I3_TIMEOUT);
+ int ret;
+ u32 reg;
+
+ dev->pg_event = MEI_PG_EVENT_INTR_WAIT;
+
+ reg = mei_me_d0i3c_read(dev);
+ if (!(reg & H_D0I3C_I3)) {
+ /* we are not in d0i3, nothing to do */
+ dev_dbg(dev->dev, "d0i3 exit not needed\n");
+ ret = 0;
+ goto off;
+ }
+
+ reg = mei_me_d0i3_unset(dev);
+ if (!(reg & H_D0I3C_CIP)) {
+ dev_dbg(dev->dev, "d0i3 exit wait not needed\n");
+ ret = 0;
+ goto off;
+ }
+
+ mutex_unlock(&dev->device_lock);
+ wait_event_timeout(dev->wait_pg,
+ dev->pg_event == MEI_PG_EVENT_INTR_RECEIVED, timeout);
+ mutex_lock(&dev->device_lock);
+
+ if (dev->pg_event != MEI_PG_EVENT_INTR_RECEIVED) {
+ reg = mei_me_d0i3c_read(dev);
+ if (reg & H_D0I3C_I3) {
+ ret = -ETIME;
+ goto out;
+ }
+ }
+
+ ret = 0;
+off:
+ hw->pg_state = MEI_PG_OFF;
+out:
+ dev->pg_event = MEI_PG_EVENT_IDLE;
+
+ dev_dbg(dev->dev, "d0i3 exit ret = %d\n", ret);
+ return ret;
+}
+
+/**
+ * mei_me_pg_legacy_intr - perform legacy pg processing
+ * in interrupt thread handler
+ *
+ * @dev: the device structure
+ */
+static void mei_me_pg_legacy_intr(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
@@ -752,6 +948,162 @@ static void mei_me_pg_intr(struct mei_device *dev)
}
/**
+ * mei_me_d0i3_intr - perform d0i3 processing in interrupt thread handler
+ *
+ * @dev: the device structure
+ */
+static void mei_me_d0i3_intr(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+
+ if (dev->pg_event == MEI_PG_EVENT_INTR_WAIT &&
+ (hw->intr_source & H_D0I3C_IS)) {
+ dev->pg_event = MEI_PG_EVENT_INTR_RECEIVED;
+ if (hw->pg_state == MEI_PG_ON) {
+ hw->pg_state = MEI_PG_OFF;
+ if (dev->hbm_state != MEI_HBM_IDLE) {
+ /*
+ * force H_RDY because it could be
+ * wiped off during PG
+ */
+ dev_dbg(dev->dev, "d0i3 set host ready\n");
+ mei_me_host_set_ready(dev);
+ }
+ } else {
+ hw->pg_state = MEI_PG_ON;
+ }
+
+ wake_up(&dev->wait_pg);
+ }
+
+ if (hw->pg_state == MEI_PG_ON && (hw->intr_source & H_IS)) {
+ /*
+ * HW sent some data and we are in D0i3, so
+ * we got here because of HW initiated exit from D0i3.
+ * Start runtime pm resume sequence to exit low power state.
+ */
+ dev_dbg(dev->dev, "d0i3 want resume\n");
+ mei_hbm_pg_resume(dev);
+ }
+}
+
+/**
+ * mei_me_pg_intr - perform pg processing in interrupt thread handler
+ *
+ * @dev: the device structure
+ */
+static void mei_me_pg_intr(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+
+ if (hw->d0i3_supported)
+ mei_me_d0i3_intr(dev);
+ else
+ mei_me_pg_legacy_intr(dev);
+}
+
+/**
+ * mei_me_pg_enter_sync - perform runtime pm entry procedure
+ *
+ * @dev: the device structure
+ *
+ * Return: 0 on success an error code otherwise
+ */
+int mei_me_pg_enter_sync(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+
+ if (hw->d0i3_supported)
+ return mei_me_d0i3_enter_sync(dev);
+ else
+ return mei_me_pg_legacy_enter_sync(dev);
+}
+
+/**
+ * mei_me_pg_exit_sync - perform runtime pm exit procedure
+ *
+ * @dev: the device structure
+ *
+ * Return: 0 on success an error code otherwise
+ */
+int mei_me_pg_exit_sync(struct mei_device *dev)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+
+ if (hw->d0i3_supported)
+ return mei_me_d0i3_exit_sync(dev);
+ else
+ return mei_me_pg_legacy_exit_sync(dev);
+}
+
+/**
+ * mei_me_hw_reset - resets fw via mei csr register.
+ *
+ * @dev: the device structure
+ * @intr_enable: if interrupt should be enabled after reset.
+ *
+ * Return: 0 on success an error code otherwise
+ */
+static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)
+{
+ struct mei_me_hw *hw = to_me_hw(dev);
+ int ret;
+ u32 hcsr;
+
+ if (intr_enable) {
+ mei_me_intr_enable(dev);
+ if (hw->d0i3_supported) {
+ ret = mei_me_d0i3_exit_sync(dev);
+ if (ret)
+ return ret;
+ }
+ }
+
+ hcsr = mei_hcsr_read(dev);
+ /* H_RST may be found lit before reset is started,
+ * for example if preceding reset flow hasn't completed.
+ * In that case asserting H_RST will be ignored, therefore
+ * we need to clean H_RST bit to start a successful reset sequence.
+ */
+ if ((hcsr & H_RST) == H_RST) {
+ dev_warn(dev->dev, "H_RST is set = 0x%08X", hcsr);
+ hcsr &= ~H_RST;
+ mei_hcsr_set(dev, hcsr);
+ hcsr = mei_hcsr_read(dev);
+ }
+
+ hcsr |= H_RST | H_IG | H_CSR_IS_MASK;
+
+ if (!intr_enable)
+ hcsr &= ~H_CSR_IE_MASK;
+
+ dev->recvd_hw_ready = false;
+ mei_hcsr_write(dev, hcsr);
+
+ /*
+ * Host reads the H_CSR once to ensure that the
+ * posted write to H_CSR completes.
+ */
+ hcsr = mei_hcsr_read(dev);
+
+ if ((hcsr & H_RST) == 0)
+ dev_warn(dev->dev, "H_RST is not set = 0x%08X", hcsr);
+
+ if ((hcsr & H_RDY) == H_RDY)
+ dev_warn(dev->dev, "H_RDY is not cleared 0x%08X", hcsr);
+
+ if (!intr_enable) {
+ mei_me_hw_reset_release(dev);
+ if (hw->d0i3_supported) {
+ ret = mei_me_d0i3_enter(dev);
+ if (ret)
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/**
* mei_me_irq_quick_handler - The ISR of the MEI device
*
* @irq: The irq number
@@ -759,16 +1111,20 @@ static void mei_me_pg_intr(struct mei_device *dev)
*
* Return: irqreturn_t
*/
-
irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
{
- struct mei_device *dev = (struct mei_device *) dev_id;
- u32 hcsr = mei_hcsr_read(dev);
+ struct mei_device *dev = (struct mei_device *)dev_id;
+ struct mei_me_hw *hw = to_me_hw(dev);
+ u32 hcsr;
- if ((hcsr & H_IS) != H_IS)
+ hcsr = mei_hcsr_read(dev);
+ if (!(hcsr & H_CSR_IS_MASK))
return IRQ_NONE;
- /* clear H_IS bit in H_CSR */
+ hw->intr_source = hcsr & H_CSR_IS_MASK;
+ dev_dbg(dev->dev, "interrupt source 0x%08X.\n", hw->intr_source);
+
+ /* clear H_IS and H_D0I3C_IS bits in H_CSR to clear the interrupts */
mei_hcsr_write(dev, hcsr);
return IRQ_WAKE_THREAD;
@@ -796,11 +1152,6 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
mutex_lock(&dev->device_lock);
mei_io_list_init(&complete_list);
- /* Ack the interrupt here
- * In case of MSI we don't go through the quick handler */
- if (pci_dev_msi_enabled(to_pci_dev(dev->dev)))
- mei_clear_interrupts(dev);
-
/* check if ME wants a reset */
if (!mei_hw_is_ready(dev) && dev->dev_state != MEI_DEV_RESETTING) {
dev_warn(dev->dev, "FW not ready: resetting.\n");
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index 6022d52af..2ee14dc1b 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -50,13 +50,17 @@ struct mei_cfg {
* struct mei_me_hw - me hw specific data
*
* @cfg: per device generation config and ops
- * @mem_addr: io memory address
- * @pg_state: power gating state
+ * @mem_addr: io memory address
+ * @intr_source: interrupt source
+ * @pg_state: power gating state
+ * @d0i3_supported: di03 support
*/
struct mei_me_hw {
const struct mei_cfg *cfg;
void __iomem *mem_addr;
+ u32 intr_source;
enum mei_pg_state pg_state;
+ bool d0i3_supported;
};
#define to_me_hw(dev) (struct mei_me_hw *)((dev)->hw)
diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h
index 16fef6dc4..4cebde859 100644
--- a/drivers/misc/mei/hw.h
+++ b/drivers/misc/mei/hw.h
@@ -31,14 +31,15 @@
#define MEI_IAMTHIF_STALL_TIMER 12 /* HPS */
#define MEI_IAMTHIF_READ_TIMER 10 /* HPS */
-#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
-#define MEI_HBM_TIMEOUT 1 /* 1 second */
+#define MEI_PGI_TIMEOUT 1 /* PG Isolation time response 1 sec */
+#define MEI_D0I3_TIMEOUT 5 /* D0i3 set/unset max response time */
+#define MEI_HBM_TIMEOUT 1 /* 1 second */
/*
* MEI Version
*/
-#define HBM_MINOR_VERSION 1
-#define HBM_MAJOR_VERSION 1
+#define HBM_MINOR_VERSION 0
+#define HBM_MAJOR_VERSION 2
/*
* MEI version with PGI support
@@ -46,6 +47,24 @@
#define HBM_MINOR_VERSION_PGI 1
#define HBM_MAJOR_VERSION_PGI 1
+/*
+ * MEI version with Dynamic clients support
+ */
+#define HBM_MINOR_VERSION_DC 0
+#define HBM_MAJOR_VERSION_DC 2
+
+/*
+ * MEI version with disconnect on connection timeout support
+ */
+#define HBM_MINOR_VERSION_DOT 0
+#define HBM_MAJOR_VERSION_DOT 2
+
+/*
+ * MEI version with notifcation support
+ */
+#define HBM_MINOR_VERSION_EV 0
+#define HBM_MAJOR_VERSION_EV 2
+
/* Host bus message command opcode */
#define MEI_HBM_CMD_OP_MSK 0x7f
/* Host bus message command RESPONSE */
@@ -81,6 +100,13 @@
#define MEI_PG_ISOLATION_EXIT_REQ_CMD 0x0b
#define MEI_PG_ISOLATION_EXIT_RES_CMD 0x8b
+#define MEI_HBM_ADD_CLIENT_REQ_CMD 0x0f
+#define MEI_HBM_ADD_CLIENT_RES_CMD 0x8f
+
+#define MEI_HBM_NOTIFY_REQ_CMD 0x10
+#define MEI_HBM_NOTIFY_RES_CMD 0x90
+#define MEI_HBM_NOTIFICATION_CMD 0x11
+
/*
* MEI Stop Reason
* used by hbm_host_stop_request.reason
@@ -136,6 +162,7 @@ enum mei_cl_connect_status {
MEI_CL_CONN_ALREADY_STARTED = MEI_HBMS_ALREADY_EXISTS,
MEI_CL_CONN_OUT_OF_RESOURCES = MEI_HBMS_REJECTED,
MEI_CL_CONN_MESSAGE_SMALL = MEI_HBMS_INVALID_PARAMETER,
+ MEI_CL_CONN_NOT_ALLOWED = MEI_HBMS_NOT_ALLOWED,
};
/*
@@ -213,9 +240,17 @@ struct hbm_me_stop_request {
u8 reserved[2];
} __packed;
+/**
+ * struct hbm_host_enum_request - enumeration request from host to fw
+ *
+ * @hbm_cmd: bus message command header
+ * @allow_add: allow dynamic clients add HBM version >= 2.0
+ * @reserved: reserved
+ */
struct hbm_host_enum_request {
u8 hbm_cmd;
- u8 reserved[3];
+ u8 allow_add;
+ u8 reserved[2];
} __packed;
struct hbm_host_enum_response {
@@ -248,6 +283,38 @@ struct hbm_props_response {
} __packed;
/**
+ * struct hbm_add_client_request - request to add a client
+ * might be sent by fw after enumeration has already completed
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @reserved: reserved
+ * @client_properties: client properties
+ */
+struct hbm_add_client_request {
+ u8 hbm_cmd;
+ u8 me_addr;
+ u8 reserved[2];
+ struct mei_client_properties client_properties;
+} __packed;
+
+/**
+ * struct hbm_add_client_response - response to add a client
+ * sent by the host to report client addition status to fw
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @status: if HBMS_SUCCESS then the client can now accept connections.
+ * @reserved: reserved
+ */
+struct hbm_add_client_response {
+ u8 hbm_cmd;
+ u8 me_addr;
+ u8 status;
+ u8 reserved[1];
+} __packed;
+
+/**
* struct hbm_power_gate - power gate request/response
*
* @hbm_cmd: bus message command header
@@ -298,5 +365,62 @@ struct hbm_flow_control {
u8 reserved[MEI_FC_MESSAGE_RESERVED_LENGTH];
} __packed;
+#define MEI_HBM_NOTIFICATION_START 1
+#define MEI_HBM_NOTIFICATION_STOP 0
+/**
+ * struct hbm_notification_request - start/stop notification request
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: address of the client in the driver
+ * @start: start = 1 or stop = 0 asynchronous notifications
+ */
+struct hbm_notification_request {
+ u8 hbm_cmd;
+ u8 me_addr;
+ u8 host_addr;
+ u8 start;
+} __packed;
+
+/**
+ * struct hbm_notification_response - start/stop notification response
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: - address of the client in the driver
+ * @status: (mei_hbm_status) response status for the request
+ * - MEI_HBMS_SUCCESS: successful stop/start
+ * - MEI_HBMS_CLIENT_NOT_FOUND: if the connection could not be found.
+ * - MEI_HBMS_ALREADY_STARTED: for start requests for a previously
+ * started notification.
+ * - MEI_HBMS_NOT_STARTED: for stop request for a connected client for whom
+ * asynchronous notifications are currently disabled.
+ *
+ * @start: start = 1 or stop = 0 asynchronous notifications
+ * @reserved: reserved
+ */
+struct hbm_notification_response {
+ u8 hbm_cmd;
+ u8 me_addr;
+ u8 host_addr;
+ u8 status;
+ u8 start;
+ u8 reserved[3];
+} __packed;
+
+/**
+ * struct hbm_notification - notification event
+ *
+ * @hbm_cmd: bus message command header
+ * @me_addr: address of the client in ME
+ * @host_addr: address of the client in the driver
+ * @reserved: reserved for alignment
+ */
+struct hbm_notification {
+ u8 hbm_cmd;
+ u8 me_addr;
+ u8 host_addr;
+ u8 reserved[1];
+} __packed;
#endif
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 00c3865ca..e37466165 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -331,7 +331,7 @@ void mei_stop(struct mei_device *dev)
mei_cancel_work(dev);
- mei_nfc_host_exit(dev);
+ mei_cl_bus_remove_devices(dev);
mutex_lock(&dev->device_lock);
@@ -390,6 +390,7 @@ void mei_device_init(struct mei_device *dev,
INIT_LIST_HEAD(&dev->me_clients);
mutex_init(&dev->device_lock);
init_rwsem(&dev->me_clients_rwsem);
+ mutex_init(&dev->cl_bus_lock);
init_waitqueue_head(&dev->wait_hw_ready);
init_waitqueue_head(&dev->wait_pg);
init_waitqueue_head(&dev->wait_hbm_start);
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 3f3405269..c418d7888 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -403,6 +403,13 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
if (ret)
return ret;
break;
+
+ case MEI_FOP_NOTIFY_START:
+ case MEI_FOP_NOTIFY_STOP:
+ ret = mei_cl_irq_notify(cl, cb, cmpl_list);
+ if (ret)
+ return ret;
+ break;
default:
BUG();
}
@@ -424,6 +431,24 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
EXPORT_SYMBOL_GPL(mei_irq_write_handler);
+/**
+ * mei_connect_timeout - connect/disconnect timeouts
+ *
+ * @cl: host client
+ */
+static void mei_connect_timeout(struct mei_cl *cl)
+{
+ struct mei_device *dev = cl->dev;
+
+ if (cl->state == MEI_FILE_CONNECTING) {
+ if (dev->hbm_f_dot_supported) {
+ cl->state = MEI_FILE_DISCONNECT_REQUIRED;
+ wake_up(&cl->wait);
+ return;
+ }
+ }
+ mei_reset(dev);
+}
/**
* mei_timer - timer function.
@@ -464,7 +489,7 @@ void mei_timer(struct work_struct *work)
if (cl->timer_count) {
if (--cl->timer_count == 0) {
dev_err(dev->dev, "timer: connect/disconnect timeout.\n");
- mei_reset(dev);
+ mei_connect_timeout(cl);
goto out;
}
}
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index e9513d651..b2f2486b3 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -446,6 +446,45 @@ end:
}
/**
+ * mei_ioctl_client_notify_request -
+ * propagate event notification request to client
+ *
+ * @file: pointer to file structure
+ * @request: 0 - disable, 1 - enable
+ *
+ * Return: 0 on success , <0 on error
+ */
+static int mei_ioctl_client_notify_request(struct file *file, u32 request)
+{
+ struct mei_cl *cl = file->private_data;
+
+ return mei_cl_notify_request(cl, file, request);
+}
+
+/**
+ * mei_ioctl_client_notify_get - wait for notification request
+ *
+ * @file: pointer to file structure
+ * @notify_get: 0 - disable, 1 - enable
+ *
+ * Return: 0 on success , <0 on error
+ */
+static int mei_ioctl_client_notify_get(struct file *file, u32 *notify_get)
+{
+ struct mei_cl *cl = file->private_data;
+ bool notify_ev;
+ bool block = (file->f_flags & O_NONBLOCK) == 0;
+ int rets;
+
+ rets = mei_cl_notify_get(cl, block, &notify_ev);
+ if (rets)
+ return rets;
+
+ *notify_get = notify_ev ? 1 : 0;
+ return 0;
+}
+
+/**
* mei_ioctl - the IOCTL function
*
* @file: pointer to file structure
@@ -459,6 +498,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
struct mei_device *dev;
struct mei_cl *cl = file->private_data;
struct mei_connect_client_data connect_data;
+ u32 notify_get, notify_req;
int rets;
@@ -499,6 +539,33 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data)
break;
+ case IOCTL_MEI_NOTIFY_SET:
+ dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_SET.\n");
+ if (copy_from_user(&notify_req,
+ (char __user *)data, sizeof(notify_req))) {
+ dev_dbg(dev->dev, "failed to copy data from userland\n");
+ rets = -EFAULT;
+ goto out;
+ }
+ rets = mei_ioctl_client_notify_request(file, notify_req);
+ break;
+
+ case IOCTL_MEI_NOTIFY_GET:
+ dev_dbg(dev->dev, ": IOCTL_MEI_NOTIFY_GET.\n");
+ rets = mei_ioctl_client_notify_get(file, &notify_get);
+ if (rets)
+ goto out;
+
+ dev_dbg(dev->dev, "copy connect data to user\n");
+ if (copy_to_user((char __user *)data,
+ &notify_get, sizeof(notify_get))) {
+ dev_dbg(dev->dev, "failed to copy data to userland\n");
+ rets = -EFAULT;
+ goto out;
+
+ }
+ break;
+
default:
dev_err(dev->dev, ": unsupported ioctl %d.\n", cmd);
rets = -ENOIOCTLCMD;
@@ -541,6 +608,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
struct mei_cl *cl = file->private_data;
struct mei_device *dev;
unsigned int mask = 0;
+ bool notify_en;
if (WARN_ON(!cl || !cl->dev))
return POLLERR;
@@ -549,6 +617,7 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
mutex_lock(&dev->device_lock);
+ notify_en = cl->notify_en && (req_events & POLLPRI);
if (dev->dev_state != MEI_DEV_ENABLED ||
!mei_cl_is_connected(cl)) {
@@ -561,6 +630,12 @@ static unsigned int mei_poll(struct file *file, poll_table *wait)
goto out;
}
+ if (notify_en) {
+ poll_wait(file, &cl->ev_wait, wait);
+ if (cl->notify_ev)
+ mask |= POLLPRI;
+ }
+
if (req_events & (POLLIN | POLLRDNORM)) {
poll_wait(file, &cl->rx_wait, wait);
@@ -576,6 +651,26 @@ out:
}
/**
+ * mei_fasync - asynchronous io support
+ *
+ * @fd: file descriptor
+ * @file: pointer to file structure
+ * @band: band bitmap
+ *
+ * Return: poll mask
+ */
+static int mei_fasync(int fd, struct file *file, int band)
+{
+
+ struct mei_cl *cl = file->private_data;
+
+ if (!mei_cl_is_connected(cl))
+ return POLLERR;
+
+ return fasync_helper(fd, file, band, &cl->ev_async);
+}
+
+/**
* fw_status_show - mei device attribute show method
*
* @device: device pointer
@@ -627,6 +722,7 @@ static const struct file_operations mei_fops = {
.release = mei_release,
.write = mei_write,
.poll = mei_poll,
+ .fasync = mei_fasync,
.llseek = no_llseek
};
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 453f6a333..e25ee16c6 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -89,6 +89,7 @@ enum file_state {
MEI_FILE_CONNECTED,
MEI_FILE_DISCONNECTING,
MEI_FILE_DISCONNECT_REPLY,
+ MEI_FILE_DISCONNECT_REQUIRED,
MEI_FILE_DISCONNECTED,
};
@@ -135,6 +136,8 @@ enum mei_wd_states {
* @MEI_FOP_CONNECT: connect
* @MEI_FOP_DISCONNECT: disconnect
* @MEI_FOP_DISCONNECT_RSP: disconnect response
+ * @MEI_FOP_NOTIFY_START: start notification
+ * @MEI_FOP_NOTIFY_STOP: stop notification
*/
enum mei_cb_file_ops {
MEI_FOP_READ = 0,
@@ -142,6 +145,8 @@ enum mei_cb_file_ops {
MEI_FOP_CONNECT,
MEI_FOP_DISCONNECT,
MEI_FOP_DISCONNECT_RSP,
+ MEI_FOP_NOTIFY_START,
+ MEI_FOP_NOTIFY_STOP,
};
/*
@@ -178,7 +183,7 @@ struct mei_fw_status {
* @client_id: me client id
* @mei_flow_ctrl_creds: flow control credits
* @connect_count: number connections to this client
- * @reserved: reserved
+ * @bus_added: added to bus
*/
struct mei_me_client {
struct list_head list;
@@ -187,7 +192,7 @@ struct mei_me_client {
u8 client_id;
u8 mei_flow_ctrl_creds;
u8 connect_count;
- u8 reserved;
+ u8 bus_added;
};
@@ -230,18 +235,21 @@ struct mei_cl_cb {
* @tx_wait: wait queue for tx completion
* @rx_wait: wait queue for rx completion
* @wait: wait queue for management operation
+ * @ev_wait: notification wait queue
+ * @ev_async: event async notification
* @status: connection status
* @me_cl: fw client connected
* @host_client_id: host id
* @mei_flow_ctrl_creds: transmit flow credentials
* @timer_count: watchdog timer for operation completion
* @reserved: reserved for alignment
+ * @notify_en: notification - enabled/disabled
+ * @notify_ev: pending notification event
* @writing_state: state of the tx
* @rd_pending: pending read credits
* @rd_completed: completed read
*
- * @device: device on the mei client bus
- * @device_link: link to bus clients
+ * @cldev: device on the mei client bus
*/
struct mei_cl {
struct list_head link;
@@ -250,19 +258,21 @@ struct mei_cl {
wait_queue_head_t tx_wait;
wait_queue_head_t rx_wait;
wait_queue_head_t wait;
+ wait_queue_head_t ev_wait;
+ struct fasync_struct *ev_async;
int status;
struct mei_me_client *me_cl;
u8 host_client_id;
u8 mei_flow_ctrl_creds;
u8 timer_count;
u8 reserved;
+ u8 notify_en;
+ u8 notify_ev;
enum mei_file_transaction_states writing_state;
struct list_head rd_pending;
struct list_head rd_completed;
- /* MEI CL bus data */
- struct mei_cl_device *device;
- struct list_head device_link;
+ struct mei_cl_device *cldev;
};
/** struct mei_hw_ops
@@ -329,21 +339,16 @@ struct mei_hw_ops {
};
/* MEI bus API*/
-
-struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
- struct mei_me_client *me_cl,
- struct mei_cl *cl,
- char *name);
-void mei_cl_remove_device(struct mei_cl_device *device);
-
+void mei_cl_bus_rescan(struct mei_device *bus);
+void mei_cl_dev_fixup(struct mei_cl_device *dev);
ssize_t __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
bool blocking);
ssize_t __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
void mei_cl_bus_rx_event(struct mei_cl *cl);
-void mei_cl_bus_remove_devices(struct mei_device *dev);
+void mei_cl_bus_notify_event(struct mei_cl *cl);
+void mei_cl_bus_remove_devices(struct mei_device *bus);
int mei_cl_bus_init(void);
void mei_cl_bus_exit(void);
-struct mei_cl *mei_cl_bus_find_cl_by_uuid(struct mei_device *dev, uuid_le uuid);
/**
* enum mei_pg_event - power gating transition events
@@ -416,7 +421,10 @@ const char *mei_pg_state_str(enum mei_pg_state state);
* @wr_msg : the buffer for hbm control messages
*
* @version : HBM protocol version in use
- * @hbm_f_pg_supported : hbm feature pgi protocol
+ * @hbm_f_pg_supported : hbm feature pgi protocol
+ * @hbm_f_dc_supported : hbm feature dynamic clients
+ * @hbm_f_dot_supported : hbm feature disconnect on timeout
+ * @hbm_f_ev_supported : hbm feature event notification
*
* @me_clients_rwsem: rw lock over me_clients list
* @me_clients : list of FW clients
@@ -447,6 +455,7 @@ const char *mei_pg_state_str(enum mei_pg_state state);
* @reset_work : work item for the device reset
*
* @device_list : mei client bus list
+ * @cl_bus_lock : client bus list lock
*
* @dbgfs_dir : debugfs mei root directory
*
@@ -509,6 +518,9 @@ struct mei_device {
struct hbm_version version;
unsigned int hbm_f_pg_supported:1;
+ unsigned int hbm_f_dc_supported:1;
+ unsigned int hbm_f_dot_supported:1;
+ unsigned int hbm_f_ev_supported:1;
struct rw_semaphore me_clients_rwsem;
struct list_head me_clients;
@@ -543,6 +555,7 @@ struct mei_device {
/* List of bus devices */
struct list_head device_list;
+ struct mutex cl_bus_lock;
#if IS_ENABLED(CONFIG_DEBUG_FS)
struct dentry *dbgfs_dir;
diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c
deleted file mode 100644
index 290ef3037..000000000
--- a/drivers/misc/mei/nfc.c
+++ /dev/null
@@ -1,415 +0,0 @@
-/*
- *
- * Intel Management Engine Interface (Intel MEI) Linux driver
- * Copyright (c) 2003-2013, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/device.h>
-#include <linux/slab.h>
-
-#include <linux/mei_cl_bus.h>
-
-#include "mei_dev.h"
-#include "client.h"
-
-struct mei_nfc_cmd {
- u8 command;
- u8 status;
- u16 req_id;
- u32 reserved;
- u16 data_size;
- u8 sub_command;
- u8 data[];
-} __packed;
-
-struct mei_nfc_reply {
- u8 command;
- u8 status;
- u16 req_id;
- u32 reserved;
- u16 data_size;
- u8 sub_command;
- u8 reply_status;
- u8 data[];
-} __packed;
-
-struct mei_nfc_if_version {
- u8 radio_version_sw[3];
- u8 reserved[3];
- u8 radio_version_hw[3];
- u8 i2c_addr;
- u8 fw_ivn;
- u8 vendor_id;
- u8 radio_type;
-} __packed;
-
-struct mei_nfc_connect {
- u8 fw_ivn;
- u8 vendor_id;
-} __packed;
-
-struct mei_nfc_connect_resp {
- u8 fw_ivn;
- u8 vendor_id;
- u16 me_major;
- u16 me_minor;
- u16 me_hotfix;
- u16 me_build;
-} __packed;
-
-struct mei_nfc_hci_hdr {
- u8 cmd;
- u8 status;
- u16 req_id;
- u32 reserved;
- u16 data_size;
-} __packed;
-
-#define MEI_NFC_CMD_MAINTENANCE 0x00
-#define MEI_NFC_CMD_HCI_SEND 0x01
-#define MEI_NFC_CMD_HCI_RECV 0x02
-
-#define MEI_NFC_SUBCMD_CONNECT 0x00
-#define MEI_NFC_SUBCMD_IF_VERSION 0x01
-
-#define MEI_NFC_HEADER_SIZE 10
-
-/**
- * struct mei_nfc_dev - NFC mei device
- *
- * @me_cl: NFC me client
- * @cl: NFC host client
- * @cl_info: NFC info host client
- * @init_work: perform connection to the info client
- * @fw_ivn: NFC Interface Version Number
- * @vendor_id: NFC manufacturer ID
- * @radio_type: NFC radio type
- * @bus_name: bus name
- *
- */
-struct mei_nfc_dev {
- struct mei_me_client *me_cl;
- struct mei_cl *cl;
- struct mei_cl *cl_info;
- struct work_struct init_work;
- u8 fw_ivn;
- u8 vendor_id;
- u8 radio_type;
- char *bus_name;
-};
-
-/* UUIDs for NFC F/W clients */
-const uuid_le mei_nfc_guid = UUID_LE(0x0bb17a78, 0x2a8e, 0x4c50,
- 0x94, 0xd4, 0x50, 0x26,
- 0x67, 0x23, 0x77, 0x5c);
-
-static const uuid_le mei_nfc_info_guid = UUID_LE(0xd2de1625, 0x382d, 0x417d,
- 0x48, 0xa4, 0xef, 0xab,
- 0xba, 0x8a, 0x12, 0x06);
-
-/* Vendors */
-#define MEI_NFC_VENDOR_INSIDE 0x00
-#define MEI_NFC_VENDOR_NXP 0x01
-
-/* Radio types */
-#define MEI_NFC_VENDOR_INSIDE_UREAD 0x00
-#define MEI_NFC_VENDOR_NXP_PN544 0x01
-
-static void mei_nfc_free(struct mei_nfc_dev *ndev)
-{
- if (!ndev)
- return;
-
- if (ndev->cl) {
- list_del(&ndev->cl->device_link);
- mei_cl_unlink(ndev->cl);
- kfree(ndev->cl);
- }
-
- if (ndev->cl_info) {
- list_del(&ndev->cl_info->device_link);
- mei_cl_unlink(ndev->cl_info);
- kfree(ndev->cl_info);
- }
-
- mei_me_cl_put(ndev->me_cl);
- kfree(ndev);
-}
-
-static int mei_nfc_build_bus_name(struct mei_nfc_dev *ndev)
-{
- struct mei_device *dev;
-
- if (!ndev->cl)
- return -ENODEV;
-
- dev = ndev->cl->dev;
-
- switch (ndev->vendor_id) {
- case MEI_NFC_VENDOR_INSIDE:
- switch (ndev->radio_type) {
- case MEI_NFC_VENDOR_INSIDE_UREAD:
- ndev->bus_name = "microread";
- return 0;
-
- default:
- dev_err(dev->dev, "Unknown radio type 0x%x\n",
- ndev->radio_type);
-
- return -EINVAL;
- }
-
- case MEI_NFC_VENDOR_NXP:
- switch (ndev->radio_type) {
- case MEI_NFC_VENDOR_NXP_PN544:
- ndev->bus_name = "pn544";
- return 0;
- default:
- dev_err(dev->dev, "Unknown radio type 0x%x\n",
- ndev->radio_type);
-
- return -EINVAL;
- }
-
- default:
- dev_err(dev->dev, "Unknown vendor ID 0x%x\n",
- ndev->vendor_id);
-
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int mei_nfc_if_version(struct mei_nfc_dev *ndev)
-{
- struct mei_device *dev;
- struct mei_cl *cl;
-
- struct mei_nfc_cmd cmd;
- struct mei_nfc_reply *reply = NULL;
- struct mei_nfc_if_version *version;
- size_t if_version_length;
- int bytes_recv, ret;
-
- cl = ndev->cl_info;
- dev = cl->dev;
-
- memset(&cmd, 0, sizeof(struct mei_nfc_cmd));
- cmd.command = MEI_NFC_CMD_MAINTENANCE;
- cmd.data_size = 1;
- cmd.sub_command = MEI_NFC_SUBCMD_IF_VERSION;
-
- ret = __mei_cl_send(cl, (u8 *)&cmd, sizeof(struct mei_nfc_cmd), 1);
- if (ret < 0) {
- dev_err(dev->dev, "Could not send IF version cmd\n");
- return ret;
- }
-
- /* to be sure on the stack we alloc memory */
- if_version_length = sizeof(struct mei_nfc_reply) +
- sizeof(struct mei_nfc_if_version);
-
- reply = kzalloc(if_version_length, GFP_KERNEL);
- if (!reply)
- return -ENOMEM;
-
- bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length);
- if (bytes_recv < 0 || bytes_recv < sizeof(struct mei_nfc_reply)) {
- dev_err(dev->dev, "Could not read IF version\n");
- ret = -EIO;
- goto err;
- }
-
- version = (struct mei_nfc_if_version *)reply->data;
-
- ndev->fw_ivn = version->fw_ivn;
- ndev->vendor_id = version->vendor_id;
- ndev->radio_type = version->radio_type;
-
-err:
- kfree(reply);
- return ret;
-}
-
-static void mei_nfc_init(struct work_struct *work)
-{
- struct mei_device *dev;
- struct mei_cl_device *cldev;
- struct mei_nfc_dev *ndev;
- struct mei_cl *cl_info;
- struct mei_me_client *me_cl_info;
-
- ndev = container_of(work, struct mei_nfc_dev, init_work);
-
- cl_info = ndev->cl_info;
- dev = cl_info->dev;
-
- mutex_lock(&dev->device_lock);
-
- /* check for valid client id */
- me_cl_info = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
- if (!me_cl_info) {
- mutex_unlock(&dev->device_lock);
- dev_info(dev->dev, "nfc: failed to find the info client\n");
- goto err;
- }
-
- if (mei_cl_connect(cl_info, me_cl_info, NULL) < 0) {
- mei_me_cl_put(me_cl_info);
- mutex_unlock(&dev->device_lock);
- dev_err(dev->dev, "Could not connect to the NFC INFO ME client");
-
- goto err;
- }
- mei_me_cl_put(me_cl_info);
- mutex_unlock(&dev->device_lock);
-
- if (mei_nfc_if_version(ndev) < 0) {
- dev_err(dev->dev, "Could not get the NFC interface version");
-
- goto err;
- }
-
- dev_info(dev->dev, "NFC MEI VERSION: IVN 0x%x Vendor ID 0x%x Type 0x%x\n",
- ndev->fw_ivn, ndev->vendor_id, ndev->radio_type);
-
- mutex_lock(&dev->device_lock);
-
- if (mei_cl_disconnect(cl_info) < 0) {
- mutex_unlock(&dev->device_lock);
- dev_err(dev->dev, "Could not disconnect the NFC INFO ME client");
-
- goto err;
- }
-
- mutex_unlock(&dev->device_lock);
-
- if (mei_nfc_build_bus_name(ndev) < 0) {
- dev_err(dev->dev, "Could not build the bus ID name\n");
- return;
- }
-
- cldev = mei_cl_add_device(dev, ndev->me_cl, ndev->cl,
- ndev->bus_name);
- if (!cldev) {
- dev_err(dev->dev, "Could not add the NFC device to the MEI bus\n");
-
- goto err;
- }
-
- cldev->priv_data = ndev;
-
-
- return;
-
-err:
- mutex_lock(&dev->device_lock);
- mei_nfc_free(ndev);
- mutex_unlock(&dev->device_lock);
-
-}
-
-
-int mei_nfc_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
-{
- struct mei_nfc_dev *ndev;
- struct mei_cl *cl_info, *cl;
- int ret;
-
-
- /* in case of internal reset bail out
- * as the device is already setup
- */
- cl = mei_cl_bus_find_cl_by_uuid(dev, mei_nfc_guid);
- if (cl)
- return 0;
-
- ndev = kzalloc(sizeof(struct mei_nfc_dev), GFP_KERNEL);
- if (!ndev) {
- ret = -ENOMEM;
- goto err;
- }
-
- ndev->me_cl = mei_me_cl_get(me_cl);
- if (!ndev->me_cl) {
- ret = -ENODEV;
- goto err;
- }
-
- cl_info = mei_cl_alloc_linked(dev, MEI_HOST_CLIENT_ID_ANY);
- if (IS_ERR(cl_info)) {
- ret = PTR_ERR(cl_info);
- goto err;
- }
-
- list_add_tail(&cl_info->device_link, &dev->device_list);
-
- ndev->cl_info = cl_info;
-
- cl = mei_cl_alloc_linked(dev, MEI_HOST_CLIENT_ID_ANY);
- if (IS_ERR(cl)) {
- ret = PTR_ERR(cl);
- goto err;
- }
-
- list_add_tail(&cl->device_link, &dev->device_list);
-
- ndev->cl = cl;
-
- INIT_WORK(&ndev->init_work, mei_nfc_init);
- schedule_work(&ndev->init_work);
-
- return 0;
-
-err:
- mei_nfc_free(ndev);
-
- return ret;
-}
-
-void mei_nfc_host_exit(struct mei_device *dev)
-{
- struct mei_nfc_dev *ndev;
- struct mei_cl *cl;
- struct mei_cl_device *cldev;
-
- cl = mei_cl_bus_find_cl_by_uuid(dev, mei_nfc_guid);
- if (!cl)
- return;
-
- cldev = cl->device;
- if (!cldev)
- return;
-
- ndev = (struct mei_nfc_dev *)cldev->priv_data;
- if (ndev)
- cancel_work_sync(&ndev->init_work);
-
- cldev->priv_data = NULL;
-
- /* Need to remove the device here
- * since mei_nfc_free will unlink the clients
- */
- mei_cl_remove_device(cldev);
-
- mutex_lock(&dev->device_lock);
- mei_nfc_free(ndev);
- mutex_unlock(&dev->device_lock);
-}
-
-
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index 23f71f5ce..27678d815 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -82,6 +82,11 @@ static const struct pci_device_id mei_me_pci_tbl[] = {
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP, mei_me_pch8_cfg)},
{MEI_PCI_DEVICE(MEI_DEV_ID_WPT_LP_2, mei_me_pch8_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_SPT, mei_me_pch8_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_2, mei_me_pch8_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H, mei_me_pch8_cfg)},
+ {MEI_PCI_DEVICE(MEI_DEV_ID_SPT_H_2, mei_me_pch8_cfg)},
+
/* required last entry */
{0, }
};
@@ -128,6 +133,7 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
const struct mei_cfg *cfg = (struct mei_cfg *)(ent->driver_data);
struct mei_device *dev;
struct mei_me_hw *hw;
+ unsigned int irqflags;
int err;
@@ -180,17 +186,12 @@ static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
pci_enable_msi(pdev);
/* request and enable interrupt */
- if (pci_dev_msi_enabled(pdev))
- err = request_threaded_irq(pdev->irq,
- NULL,
- mei_me_irq_thread_handler,
- IRQF_ONESHOT, KBUILD_MODNAME, dev);
- else
- err = request_threaded_irq(pdev->irq,
+ irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
+
+ err = request_threaded_irq(pdev->irq,
mei_me_irq_quick_handler,
mei_me_irq_thread_handler,
- IRQF_SHARED, KBUILD_MODNAME, dev);
-
+ irqflags, KBUILD_MODNAME, dev);
if (err) {
dev_err(&pdev->dev, "request_threaded_irq failure. irq = %d\n",
pdev->irq);
@@ -319,6 +320,7 @@ static int mei_me_pci_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct mei_device *dev;
+ unsigned int irqflags;
int err;
dev = pci_get_drvdata(pdev);
@@ -327,17 +329,13 @@ static int mei_me_pci_resume(struct device *device)
pci_enable_msi(pdev);
+ irqflags = pci_dev_msi_enabled(pdev) ? IRQF_ONESHOT : IRQF_SHARED;
+
/* request and enable interrupt */
- if (pci_dev_msi_enabled(pdev))
- err = request_threaded_irq(pdev->irq,
- NULL,
- mei_me_irq_thread_handler,
- IRQF_ONESHOT, KBUILD_MODNAME, dev);
- else
- err = request_threaded_irq(pdev->irq,
+ err = request_threaded_irq(pdev->irq,
mei_me_irq_quick_handler,
mei_me_irq_thread_handler,
- IRQF_SHARED, KBUILD_MODNAME, dev);
+ irqflags, KBUILD_MODNAME, dev);
if (err) {
dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n",
diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c
index 2bc0f5089..b34663883 100644
--- a/drivers/misc/mei/wd.c
+++ b/drivers/misc/mei/wd.c
@@ -364,6 +364,7 @@ int mei_watchdog_register(struct mei_device *dev)
int ret;
+ amt_wd_dev.parent = dev->dev;
/* unlock to perserve correct locking order */
mutex_unlock(&dev->device_lock);
ret = watchdog_register_device(&amt_wd_dev);