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path: root/drivers/misc/mei
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-rw-r--r--drivers/misc/mei/Kconfig5
-rw-r--r--drivers/misc/mei/Makefile9
-rw-r--r--drivers/misc/mei/amthif.c21
-rw-r--r--drivers/misc/mei/bus.c528
-rw-r--r--drivers/misc/mei/client.c116
-rw-r--r--drivers/misc/mei/client.h7
-rw-r--r--drivers/misc/mei/debugfs.c143
-rw-r--r--drivers/misc/mei/hbm.c82
-rw-r--r--drivers/misc/mei/hbm.h25
-rw-r--r--drivers/misc/mei/hw-me.c124
-rw-r--r--drivers/misc/mei/hw-me.h6
-rw-r--r--drivers/misc/mei/init.c70
-rw-r--r--drivers/misc/mei/interrupt.c242
-rw-r--r--drivers/misc/mei/main.c127
-rw-r--r--drivers/misc/mei/mei_dev.h166
-rw-r--r--drivers/misc/mei/nfc.c554
-rw-r--r--drivers/misc/mei/pci-me.c46
-rw-r--r--drivers/misc/mei/wd.c3
18 files changed, 1903 insertions, 371 deletions
diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig
index d21b4d006a5..c76fa31e9bf 100644
--- a/drivers/misc/mei/Kconfig
+++ b/drivers/misc/mei/Kconfig
@@ -10,10 +10,9 @@ config INTEL_MEI
<http://software.intel.com/en-us/manageability/>
config INTEL_MEI_ME
- bool "ME Enabled Intel Chipsets"
- depends on INTEL_MEI
+ tristate "ME Enabled Intel Chipsets"
+ select INTEL_MEI
depends on X86 && PCI && WATCHDOG_CORE
- default y
help
MEI support for ME Enabled Intel chipsets.
diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile
index 040af6c7b14..08698a46626 100644
--- a/drivers/misc/mei/Makefile
+++ b/drivers/misc/mei/Makefile
@@ -10,5 +10,10 @@ mei-objs += client.o
mei-objs += main.o
mei-objs += amthif.o
mei-objs += wd.o
-mei-$(CONFIG_INTEL_MEI_ME) += pci-me.o
-mei-$(CONFIG_INTEL_MEI_ME) += hw-me.o
+mei-objs += bus.o
+mei-objs += nfc.o
+mei-$(CONFIG_DEBUG_FS) += debugfs.o
+
+obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o
+mei-me-objs := pci-me.o
+mei-me-objs += hw-me.o
diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index c86d7e3839a..31a6212cb8b 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -449,7 +449,7 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
struct mei_msg_hdr mei_hdr;
struct mei_cl *cl = cb->cl;
size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index;
- size_t msg_slots = mei_data2slots(len);
+ u32 msg_slots = mei_data2slots(len);
mei_hdr.host_addr = cl->host_client_id;
mei_hdr.me_addr = cl->me_client_id;
@@ -505,14 +505,15 @@ int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
* mei_amthif_irq_read_message - read routine after ISR to
* handle the read amthif message
*
- * @complete_list: An instance of our list structure
* @dev: the device structure
* @mei_hdr: header of amthif message
+ * @complete_list: An instance of our list structure
*
* returns 0 on success, <0 on failure.
*/
-int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
- struct mei_device *dev, struct mei_msg_hdr *mei_hdr)
+int mei_amthif_irq_read_msg(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr,
+ struct mei_cl_cb *complete_list)
{
struct mei_cl_cb *cb;
unsigned char *buffer;
@@ -530,8 +531,7 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
if (!mei_hdr->msg_complete)
return 0;
- dev_dbg(&dev->pdev->dev,
- "amthif_message_buffer_index =%d\n",
+ dev_dbg(&dev->pdev->dev, "amthif_message_buffer_index =%d\n",
mei_hdr->length);
dev_dbg(&dev->pdev->dev, "completed amthif read.\n ");
@@ -566,12 +566,13 @@ int mei_amthif_irq_read_message(struct mei_cl_cb *complete_list,
*/
int mei_amthif_irq_read(struct mei_device *dev, s32 *slots)
{
+ u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
- if (((*slots) * sizeof(u32)) < (sizeof(struct mei_msg_hdr)
- + sizeof(struct hbm_flow_control))) {
+ if (*slots < msg_slots)
return -EMSGSIZE;
- }
- *slots -= mei_data2slots(sizeof(struct hbm_flow_control));
+
+ *slots -= msg_slots;
+
if (mei_hbm_cl_flow_control_req(dev, &dev->iamthif_cl)) {
dev_dbg(&dev->pdev->dev, "iamthif flow control failed\n");
return -EIO;
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
new file mode 100644
index 00000000000..1e935eacaa7
--- /dev/null
+++ b/drivers/misc/mei/bus.c
@@ -0,0 +1,528 @@
+/*
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2012-2013, 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/module.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/mei_cl_bus.h>
+
+#include "mei_dev.h"
+#include "hw-me.h"
+#include "client.h"
+
+#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;
+
+ if (!device)
+ return 0;
+
+ if (!driver || !driver->id_table)
+ return 0;
+
+ id = driver->id_table;
+
+ while (id->name[0]) {
+ if (!strcmp(dev_name(dev), id->name))
+ 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");
+
+ strncpy(id.name, dev_name(dev), MEI_CL_NAME_SIZE);
+
+ 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 modalias_show(struct device *dev, struct device_attribute *a,
+ char *buf)
+{
+ int len;
+
+ len = snprintf(buf, PAGE_SIZE, "mei:%s\n", dev_name(dev));
+
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+
+static struct device_attribute mei_cl_dev_attrs[] = {
+ __ATTR_RO(modalias),
+ __ATTR_NULL,
+};
+
+static int mei_cl_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ if (add_uevent_var(env, "MODALIAS=mei:%s", dev_name(dev)))
+ return -ENOMEM;
+
+ return 0;
+}
+
+static struct bus_type mei_cl_bus_type = {
+ .name = "mei",
+ .dev_attrs = mei_cl_dev_attrs,
+ .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)
+{
+ kfree(to_mei_cl_device(dev));
+}
+
+static struct device_type mei_cl_device_type = {
+ .release = mei_cl_dev_release,
+};
+
+static struct mei_cl *mei_bus_find_mei_cl_by_uuid(struct mei_device *dev,
+ uuid_le uuid)
+{
+ struct mei_cl *cl, *next;
+
+ list_for_each_entry_safe(cl, next, &dev->device_list, device_link) {
+ if (!uuid_le_cmp(uuid, cl->device_uuid))
+ return cl;
+ }
+
+ return NULL;
+}
+struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
+ uuid_le uuid, char *name,
+ struct mei_cl_ops *ops)
+{
+ struct mei_cl_device *device;
+ struct mei_cl *cl;
+ int status;
+
+ cl = mei_bus_find_mei_cl_by_uuid(dev, uuid);
+ if (cl == NULL)
+ return NULL;
+
+ device = kzalloc(sizeof(struct mei_cl_device), GFP_KERNEL);
+ if (!device)
+ return NULL;
+
+ device->cl = cl;
+ device->ops = ops;
+
+ device->dev.parent = &dev->pdev->dev;
+ device->dev.bus = &mei_cl_bus_type;
+ device->dev.type = &mei_cl_device_type;
+
+ dev_set_name(&device->dev, "%s", name);
+
+ status = device_register(&device->dev);
+ if (status) {
+ dev_err(&dev->pdev->dev, "Failed to register MEI device\n");
+ 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);
+
+static int ___mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length,
+ bool blocking)
+{
+ struct mei_device *dev;
+ struct mei_cl_cb *cb;
+ int id;
+ int rets;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ if (cl->state != MEI_FILE_CONNECTED)
+ return -ENODEV;
+
+ /* Check if we have an ME client device */
+ id = mei_me_cl_by_id(dev, cl->me_client_id);
+ if (id < 0)
+ return -ENODEV;
+
+ if (length > dev->me_clients[id].props.max_msg_length)
+ return -EINVAL;
+
+ cb = mei_io_cb_init(cl, NULL);
+ if (!cb)
+ return -ENOMEM;
+
+ rets = mei_io_cb_alloc_req_buf(cb, length);
+ if (rets < 0) {
+ mei_io_cb_free(cb);
+ return rets;
+ }
+
+ memcpy(cb->request_buffer.data, buf, length);
+
+ mutex_lock(&dev->device_lock);
+
+ rets = mei_cl_write(cl, cb, blocking);
+
+ mutex_unlock(&dev->device_lock);
+ if (rets < 0)
+ mei_io_cb_free(cb);
+
+ return rets;
+}
+
+int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length)
+{
+ struct mei_device *dev;
+ struct mei_cl_cb *cb;
+ size_t r_length;
+ int err;
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ dev = cl->dev;
+
+ mutex_lock(&dev->device_lock);
+
+ if (!cl->read_cb) {
+ err = mei_cl_read_start(cl, length);
+ if (err < 0) {
+ mutex_unlock(&dev->device_lock);
+ return err;
+ }
+ }
+
+ if (cl->reading_state != MEI_READ_COMPLETE &&
+ !waitqueue_active(&cl->rx_wait)) {
+ mutex_unlock(&dev->device_lock);
+
+ if (wait_event_interruptible(cl->rx_wait,
+ (MEI_READ_COMPLETE == cl->reading_state))) {
+ if (signal_pending(current))
+ return -EINTR;
+ return -ERESTARTSYS;
+ }
+
+ mutex_lock(&dev->device_lock);
+ }
+
+ cb = cl->read_cb;
+
+ if (cl->reading_state != MEI_READ_COMPLETE) {
+ r_length = 0;
+ goto out;
+ }
+
+ r_length = min_t(size_t, length, cb->buf_idx);
+
+ memcpy(buf, cb->response_buffer.data, r_length);
+
+ mei_io_cb_free(cb);
+ cl->reading_state = MEI_IDLE;
+ cl->read_cb = NULL;
+
+out:
+ mutex_unlock(&dev->device_lock);
+
+ return r_length;
+}
+
+inline int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length)
+{
+ return ___mei_cl_send(cl, buf, length, 0);
+}
+
+inline int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length)
+{
+ return ___mei_cl_send(cl, buf, length, 1);
+}
+
+int mei_cl_send(struct mei_cl_device *device, u8 *buf, size_t length)
+{
+ struct mei_cl *cl = device->cl;
+
+ if (cl == NULL)
+ return -ENODEV;
+
+ if (device->ops && device->ops->send)
+ return device->ops->send(device, buf, length);
+
+ return __mei_cl_send(cl, buf, length);
+}
+EXPORT_SYMBOL_GPL(mei_cl_send);
+
+int mei_cl_recv(struct mei_cl_device *device, u8 *buf, size_t length)
+{
+ struct mei_cl *cl = device->cl;
+
+ if (cl == NULL)
+ return -ENODEV;
+
+ if (device->ops && device->ops->recv)
+ return device->ops->recv(device, buf, length);
+
+ return __mei_cl_recv(cl, buf, length);
+}
+EXPORT_SYMBOL_GPL(mei_cl_recv);
+
+static void mei_bus_event_work(struct work_struct *work)
+{
+ struct mei_cl_device *device;
+
+ device = container_of(work, struct mei_cl_device, event_work);
+
+ if (device->event_cb)
+ device->event_cb(device, device->events, device->event_context);
+
+ device->events = 0;
+
+ /* Prepare for the next read */
+ mei_cl_read_start(device->cl, 0);
+}
+
+int mei_cl_register_event_cb(struct mei_cl_device *device,
+ mei_cl_event_cb_t event_cb, void *context)
+{
+ if (device->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);
+
+ mei_cl_read_start(device->cl, 0);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(mei_cl_register_event_cb);
+
+void *mei_cl_get_drvdata(const struct mei_cl_device *device)
+{
+ return dev_get_drvdata(&device->dev);
+}
+EXPORT_SYMBOL_GPL(mei_cl_get_drvdata);
+
+void mei_cl_set_drvdata(struct mei_cl_device *device, void *data)
+{
+ dev_set_drvdata(&device->dev, data);
+}
+EXPORT_SYMBOL_GPL(mei_cl_set_drvdata);
+
+int mei_cl_enable_device(struct mei_cl_device *device)
+{
+ 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);
+
+ cl->state = MEI_FILE_CONNECTING;
+
+ err = mei_cl_connect(cl, NULL);
+ if (err < 0) {
+ mutex_unlock(&dev->device_lock);
+ dev_err(&dev->pdev->dev, "Could not connect to the ME client");
+
+ return err;
+ }
+
+ mutex_unlock(&dev->device_lock);
+
+ if (device->event_cb && !cl->read_cb)
+ mei_cl_read_start(device->cl, 0);
+
+ if (!device->ops || !device->ops->enable)
+ return 0;
+
+ return device->ops->enable(device);
+}
+EXPORT_SYMBOL_GPL(mei_cl_enable_device);
+
+int mei_cl_disable_device(struct mei_cl_device *device)
+{
+ 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);
+
+ if (cl->state != MEI_FILE_CONNECTED) {
+ mutex_unlock(&dev->device_lock);
+ dev_err(&dev->pdev->dev, "Already disconnected");
+
+ return 0;
+ }
+
+ cl->state = MEI_FILE_DISCONNECTING;
+
+ err = mei_cl_disconnect(cl);
+ if (err < 0) {
+ mutex_unlock(&dev->device_lock);
+ dev_err(&dev->pdev->dev,
+ "Could not disconnect from the ME client");
+
+ return err;
+ }
+
+ /* Flush queues and remove any pending read */
+ mei_cl_flush_queues(cl);
+
+ if (cl->read_cb) {
+ struct mei_cl_cb *cb = NULL;
+
+ cb = mei_cl_find_read_cb(cl);
+ /* Remove entry from read list */
+ if (cb)
+ list_del(&cb->list);
+
+ cb = cl->read_cb;
+ cl->read_cb = NULL;
+
+ if (cb) {
+ mei_io_cb_free(cb);
+ cb = NULL;
+ }
+ }
+
+ mutex_unlock(&dev->device_lock);
+
+ if (!device->ops || !device->ops->disable)
+ return 0;
+
+ return device->ops->disable(device);
+}
+EXPORT_SYMBOL_GPL(mei_cl_disable_device);
+
+void mei_cl_bus_rx_event(struct mei_cl *cl)
+{
+ struct mei_cl_device *device = cl->device;
+
+ if (!device || !device->event_cb)
+ return;
+
+ set_bit(MEI_CL_EVENT_RX, &device->events);
+
+ schedule_work(&device->event_work);
+}
+
+int __init mei_cl_bus_init(void)
+{
+ return bus_register(&mei_cl_bus_type);
+}
+
+void __exit mei_cl_bus_exit(void)
+{
+ bus_unregister(&mei_cl_bus_type);
+}
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 1569afe935d..71892745e2e 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -216,6 +216,7 @@ void mei_cl_init(struct mei_cl *cl, struct mei_device *dev)
init_waitqueue_head(&cl->rx_wait);
init_waitqueue_head(&cl->tx_wait);
INIT_LIST_HEAD(&cl->link);
+ INIT_LIST_HEAD(&cl->device_link);
cl->reading_state = MEI_IDLE;
cl->writing_state = MEI_IDLE;
cl->dev = dev;
@@ -357,6 +358,9 @@ void mei_host_client_init(struct work_struct *work)
mei_amthif_host_init(dev);
else if (!uuid_le_cmp(client_props->protocol_name, mei_wd_guid))
mei_wd_host_init(dev);
+ else if (!uuid_le_cmp(client_props->protocol_name, mei_nfc_guid))
+ mei_nfc_host_init(dev);
+
}
dev->dev_state = MEI_DEV_ENABLED;
@@ -620,7 +624,7 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl)
*
* returns 0 on success, <0 on failure.
*/
-int mei_cl_read_start(struct mei_cl *cl)
+int mei_cl_read_start(struct mei_cl *cl, size_t length)
{
struct mei_device *dev;
struct mei_cl_cb *cb;
@@ -653,8 +657,9 @@ int mei_cl_read_start(struct mei_cl *cl)
if (!cb)
return -ENOMEM;
- rets = mei_io_cb_alloc_resp_buf(cb,
- dev->me_clients[i].props.max_msg_length);
+ /* always allocate at least client max message */
+ length = max_t(size_t, length, dev->me_clients[i].props.max_msg_length);
+ rets = mei_io_cb_alloc_resp_buf(cb, length);
if (rets)
goto err;
@@ -677,6 +682,111 @@ err:
}
/**
+ * mei_cl_write - submit a write cb to mei device
+ assumes device_lock is locked
+ *
+ * @cl: host client
+ * @cl: write callback with filled data
+ *
+ * returns numbe of bytes sent on success, <0 on failure.
+ */
+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 rets;
+
+
+ if (WARN_ON(!cl || !cl->dev))
+ return -ENODEV;
+
+ if (WARN_ON(!cb))
+ return -EINVAL;
+
+ dev = cl->dev;
+
+
+ buf = &cb->request_buffer;
+
+ dev_dbg(&dev->pdev->dev, "mei_cl_write %d\n", buf->size);
+
+
+ cb->fop_type = MEI_FOP_WRITE;
+
+ rets = mei_cl_flow_ctrl_creds(cl);
+ if (rets < 0)
+ goto err;
+
+ /* Host buffer is not ready, we queue the request */
+ if (rets == 0 || !dev->hbuf_is_ready) {
+ cb->buf_idx = 0;
+ /* unseting complete will enqueue the cb for write */
+ mei_hdr.msg_complete = 0;
+ cl->writing_state = MEI_WRITING;
+ rets = buf->size;
+ goto out;
+ }
+
+ dev->hbuf_is_ready = false;
+
+ /* Check for a maximum length */
+ if (buf->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.msg_complete = 1;
+ }
+
+ mei_hdr.host_addr = cl->host_client_id;
+ mei_hdr.me_addr = cl->me_client_id;
+ mei_hdr.reserved = 0;
+
+ dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n",
+ MEI_HDR_PRM(&mei_hdr));
+
+
+ if (mei_write_message(dev, &mei_hdr, buf->data)) {
+ rets = -EIO;
+ goto err;
+ }
+
+ cl->writing_state = MEI_WRITING;
+ cb->buf_idx = mei_hdr.length;
+
+ rets = buf->size;
+out:
+ if (mei_hdr.msg_complete) {
+ if (mei_cl_flow_ctrl_reduce(cl)) {
+ rets = -ENODEV;
+ goto err;
+ }
+ list_add_tail(&cb->list, &dev->write_waiting_list.list);
+ } else {
+ list_add_tail(&cb->list, &dev->write_list.list);
+ }
+
+
+ if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) {
+
+ mutex_unlock(&dev->device_lock);
+ if (wait_event_interruptible(cl->tx_wait,
+ cl->writing_state == MEI_WRITE_COMPLETE)) {
+ if (signal_pending(current))
+ rets = -EINTR;
+ else
+ rets = -ERESTARTSYS;
+ }
+ mutex_lock(&dev->device_lock);
+ }
+err:
+ return rets;
+}
+
+
+
+/**
* mei_cl_all_disconnect - disconnect forcefully all connected clients
*
* @dev - mei device
diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
index 214b2397ec3..cfdb144526a 100644
--- a/drivers/misc/mei/client.h
+++ b/drivers/misc/mei/client.h
@@ -86,17 +86,16 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl);
*/
bool mei_cl_is_other_connecting(struct mei_cl *cl);
int mei_cl_disconnect(struct mei_cl *cl);
-
-int mei_cl_read_start(struct mei_cl *cl);
-
int mei_cl_connect(struct mei_cl *cl, struct file *file);
+int mei_cl_read_start(struct mei_cl *cl, size_t length);
+int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking);
void mei_host_client_init(struct work_struct *work);
+
void mei_cl_all_disconnect(struct mei_device *dev);
void mei_cl_all_read_wakeup(struct mei_device *dev);
void mei_cl_all_write_clear(struct mei_device *dev);
-
#endif /* _MEI_CLIENT_H_ */
diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c
new file mode 100644
index 00000000000..e3870f22d23
--- /dev/null
+++ b/drivers/misc/mei/debugfs.c
@@ -0,0 +1,143 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2012-2013, 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/slab.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/debugfs.h>
+#include <linux/pci.h>
+
+#include <linux/mei.h>
+
+#include "mei_dev.h"
+#include "hw.h"
+
+static ssize_t mei_dbgfs_read_meclients(struct file *fp, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ struct mei_device *dev = fp->private_data;
+ struct mei_me_client *cl;
+ const size_t bufsz = 1024;
+ char *buf = kzalloc(bufsz, GFP_KERNEL);
+ int i;
+ int pos = 0;
+ int ret;
+
+ if (!buf)
+ return -ENOMEM;
+
+ pos += scnprintf(buf + pos, bufsz - pos,
+ " |id|addr| UUID |con|msg len|\n");
+
+ mutex_lock(&dev->device_lock);
+
+ /* if the driver is not enabled the list won't b consitent */
+ if (dev->dev_state != MEI_DEV_ENABLED)
+ goto out;
+
+ for (i = 0; i < dev->me_clients_num; i++) {
+ cl = &dev->me_clients[i];
+
+ /* skip me clients that cannot be connected */
+ if (cl->props.max_number_of_connections == 0)
+ continue;
+
+ pos += scnprintf(buf + pos, bufsz - pos,
+ "%2d|%2d|%4d|%pUl|%3d|%7d|\n",
+ i, cl->client_id,
+ cl->props.fixed_address,
+ &cl->props.protocol_name,
+ cl->props.max_number_of_connections,
+ cl->props.max_msg_length);
+ }
+out:
+ mutex_unlock(&dev->device_lock);
+ ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+ kfree(buf);
+ return ret;
+}
+
+static const struct file_operations mei_dbgfs_fops_meclients = {
+ .open = simple_open,
+ .read = mei_dbgfs_read_meclients,
+ .llseek = generic_file_llseek,
+};
+
+static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf,
+ size_t cnt, loff_t *ppos)
+{
+ struct mei_device *dev = fp->private_data;
+ const size_t bufsz = 1024;
+ char *buf = kzalloc(bufsz, GFP_KERNEL);
+ int pos = 0;
+ int ret;
+
+ if (!buf)
+ return -ENOMEM;
+
+ pos += scnprintf(buf + pos, bufsz - pos, "%s\n",
+ mei_dev_state_str(dev->dev_state));
+ ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos);
+ kfree(buf);
+ return ret;
+}
+static const struct file_operations mei_dbgfs_fops_devstate = {
+ .open = simple_open,
+ .read = mei_dbgfs_read_devstate,
+ .llseek = generic_file_llseek,
+};
+
+/**
+ * mei_dbgfs_deregister - Remove the debugfs files and directories
+ * @mei - pointer to mei device private dat
+ */
+void mei_dbgfs_deregister(struct mei_device *dev)
+{
+ if (!dev->dbgfs_dir)
+ return;
+ debugfs_remove_recursive(dev->dbgfs_dir);
+ dev->dbgfs_dir = NULL;
+}
+
+/**
+ * Add the debugfs files
+ *
+ */
+int mei_dbgfs_register(struct mei_device *dev, const char *name)
+{
+ struct dentry *dir, *f;
+ dir = debugfs_create_dir(name, NULL);
+ if (!dir)
+ return -ENOMEM;
+
+ f = debugfs_create_file("meclients", S_IRUSR, dir,
+ dev, &mei_dbgfs_fops_meclients);
+ if (!f) {
+ dev_err(&dev->pdev->dev, "meclients: registration failed\n");
+ goto err;
+ }
+ f = debugfs_create_file("devstate", S_IRUSR, dir,
+ dev, &mei_dbgfs_fops_devstate);
+ if (!f) {
+ dev_err(&dev->pdev->dev, "devstate: registration failed\n");
+ goto err;
+ }
+ dev->dbgfs_dir = dir;
+ return 0;
+err:
+ mei_dbgfs_deregister(dev);
+ return -ENODEV;
+}
+
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index fb9e63ba3bb..db605f5cf18 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -52,7 +52,7 @@ static void mei_hbm_me_cl_allocate(struct mei_device *dev)
sizeof(struct mei_me_client), GFP_KERNEL);
if (!clients) {
dev_err(&dev->pdev->dev, "memory allocation for ME clients failed.\n");
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;
mei_reset(dev, 1);
return;
}
@@ -123,12 +123,33 @@ static bool is_treat_specially_client(struct mei_cl *cl,
return false;
}
+int mei_hbm_start_wait(struct mei_device *dev)
+{
+ int ret;
+ if (dev->hbm_state > MEI_HBM_START)
+ return 0;
+
+ mutex_unlock(&dev->device_lock);
+ ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
+ dev->hbm_state == MEI_HBM_IDLE ||
+ dev->hbm_state > MEI_HBM_START,
+ mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
+ mutex_lock(&dev->device_lock);
+
+ if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) {
+ dev->hbm_state = MEI_HBM_IDLE;
+ dev_err(&dev->pdev->dev, "wating for mei start failed\n");
+ return -ETIMEDOUT;
+ }
+ return 0;
+}
+
/**
* mei_hbm_start_req - sends start request message.
*
* @dev: the device structure
*/
-void mei_hbm_start_req(struct mei_device *dev)
+int mei_hbm_start_req(struct mei_device *dev)
{
struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr;
struct hbm_host_version_request *start_req;
@@ -143,18 +164,19 @@ void mei_hbm_start_req(struct mei_device *dev)
start_req->host_version.major_version = HBM_MAJOR_VERSION;
start_req->host_version.minor_version = HBM_MINOR_VERSION;
- dev->recvd_msg = false;
+ dev->hbm_state = MEI_HBM_IDLE;
if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev_dbg(&dev->pdev->dev, "write send version message to FW fail.\n");
- dev->dev_state = MEI_DEV_RESETING;
+ dev_err(&dev->pdev->dev, "version message writet failed\n");
+ dev->dev_state = MEI_DEV_RESETTING;
mei_reset(dev, 1);
+ return -ENODEV;
}
- dev->init_clients_state = MEI_START_MESSAGE;
+ dev->hbm_state = MEI_HBM_START;
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
- return ;
+ return 0;
}
-/**
+/*
* mei_hbm_enum_clients_req - sends enumeration client request message.
*
* @dev: the device structure
@@ -174,11 +196,11 @@ static void mei_hbm_enum_clients_req(struct mei_device *dev)
enum_req->hbm_cmd = HOST_ENUM_REQ_CMD;
if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev->dev_state = MEI_DEV_RESETING;
- dev_dbg(&dev->pdev->dev, "write send enumeration request message to FW fail.\n");
+ dev->dev_state = MEI_DEV_RESETTING;
+ dev_err(&dev->pdev->dev, "enumeration request write failed.\n");
mei_reset(dev, 1);
}
- dev->init_clients_state = MEI_ENUM_CLIENTS_MESSAGE;
+ dev->hbm_state = MEI_HBM_ENUM_CLIENTS;
dev->init_clients_timer = MEI_CLIENTS_INIT_TIMEOUT;
return;
}
@@ -208,6 +230,7 @@ static int mei_hbm_prop_req(struct mei_device *dev)
/* We got all client properties */
if (next_client_index == MEI_CLIENTS_MAX) {
+ dev->hbm_state = MEI_HBM_STARTED;
schedule_work(&dev->init_work);
return 0;
@@ -226,8 +249,8 @@ static int mei_hbm_prop_req(struct mei_device *dev)
prop_req->address = next_client_index;
if (mei_write_message(dev, mei_hdr, dev->wr_msg.data)) {
- dev->dev_state = MEI_DEV_RESETING;
- dev_err(&dev->pdev->dev, "Properties request command failed\n");
+ dev->dev_state = MEI_DEV_RESETTING;
+ dev_err(&dev->pdev->dev, "properties request write failed\n");
mei_reset(dev, 1);
return -EIO;
@@ -542,27 +565,28 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
dev->version = version_res->me_max_version;
dev_dbg(&dev->pdev->dev, "version mismatch.\n");
+ dev->hbm_state = MEI_HBM_STOP;
mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr,
dev->wr_msg.data);
mei_write_message(dev, &dev->wr_msg.hdr,
dev->wr_msg.data);
+
return;
}
dev->version.major_version = HBM_MAJOR_VERSION;
dev->version.minor_version = HBM_MINOR_VERSION;
if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->init_clients_state == MEI_START_MESSAGE) {
+ dev->hbm_state == MEI_HBM_START) {
dev->init_clients_timer = 0;
mei_hbm_enum_clients_req(dev);
} else {
- dev->recvd_msg = false;
- dev_dbg(&dev->pdev->dev, "reset due to received hbm: host start\n");
+ dev_err(&dev->pdev->dev, "reset: wrong host start response\n");
mei_reset(dev, 1);
return;
}
- dev->recvd_msg = true;
+ wake_up_interruptible(&dev->wait_recvd_msg);
dev_dbg(&dev->pdev->dev, "host start response message received.\n");
break;
@@ -591,23 +615,20 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
me_client = &dev->me_clients[dev->me_client_presentation_num];
if (props_res->status || !dev->me_clients) {
- dev_dbg(&dev->pdev->dev, "reset due to received host client properties response bus message wrong status.\n");
+ dev_err(&dev->pdev->dev, "reset: properties response hbm wrong status.\n");
mei_reset(dev, 1);
return;
}
if (me_client->client_id != props_res->address) {
- dev_err(&dev->pdev->dev,
- "Host client properties reply mismatch\n");
+ dev_err(&dev->pdev->dev, "reset: host properties response address mismatch\n");
mei_reset(dev, 1);
-
return;
}
if (dev->dev_state != MEI_DEV_INIT_CLIENTS ||
- dev->init_clients_state != MEI_CLIENT_PROPERTIES_MESSAGE) {
- dev_err(&dev->pdev->dev,
- "Unexpected client properties reply\n");
+ dev->hbm_state != MEI_HBM_CLIENT_PROPERTIES) {
+ dev_err(&dev->pdev->dev, "reset: unexpected properties response\n");
mei_reset(dev, 1);
return;
@@ -626,26 +647,28 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
enum_res = (struct hbm_host_enum_response *) mei_msg;
memcpy(dev->me_clients_map, enum_res->valid_addresses, 32);
if (dev->dev_state == MEI_DEV_INIT_CLIENTS &&
- dev->init_clients_state == MEI_ENUM_CLIENTS_MESSAGE) {
+ dev->hbm_state == MEI_HBM_ENUM_CLIENTS) {
dev->init_clients_timer = 0;
dev->me_client_presentation_num = 0;
dev->me_client_index = 0;
mei_hbm_me_cl_allocate(dev);
- dev->init_clients_state =
- MEI_CLIENT_PROPERTIES_MESSAGE;
+ dev->hbm_state = MEI_HBM_CLIENT_PROPERTIES;
/* first property reqeust */
mei_hbm_prop_req(dev);
} else {
- dev_dbg(&dev->pdev->dev, "reset due to received host enumeration clients response bus message.\n");
+ dev_err(&dev->pdev->dev, "reset: unexpected enumeration response hbm.\n");
mei_reset(dev, 1);
return;
}
break;
case HOST_STOP_RES_CMD:
+
+ if (dev->hbm_state != MEI_HBM_STOP)
+ dev_err(&dev->pdev->dev, "unexpected stop response hbm.\n");
dev->dev_state = MEI_DEV_DISABLED;
- dev_dbg(&dev->pdev->dev, "resetting because of FW stop response.\n");
+ dev_info(&dev->pdev->dev, "reset: FW stop response.\n");
mei_reset(dev, 1);
break;
@@ -657,6 +680,7 @@ void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr)
case ME_STOP_REQ_CMD:
+ dev->hbm_state = MEI_HBM_STOP;
mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr,
dev->wr_ext_msg.data);
break;
diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h
index b552afbaf85..e80dc24ef3e 100644
--- a/drivers/misc/mei/hbm.h
+++ b/drivers/misc/mei/hbm.h
@@ -17,6 +17,27 @@
#ifndef _MEI_HBM_H_
#define _MEI_HBM_H_
+struct mei_device;
+struct mei_msg_hdr;
+struct mei_cl;
+
+/**
+ * enum mei_hbm_state - host bus message protocol state
+ *
+ * @MEI_HBM_IDLE : protocol not started
+ * @MEI_HBM_START : start request message was sent
+ * @MEI_HBM_ENUM_CLIENTS : enumeration request was sent
+ * @MEI_HBM_CLIENT_PROPERTIES : acquiring clients properties
+ */
+enum mei_hbm_state {
+ MEI_HBM_IDLE = 0,
+ MEI_HBM_START,
+ MEI_HBM_ENUM_CLIENTS,
+ MEI_HBM_CLIENT_PROPERTIES,
+ MEI_HBM_STARTED,
+ MEI_HBM_STOP,
+};
+
void mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr);
static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
@@ -28,8 +49,8 @@ static inline void mei_hbm_hdr(struct mei_msg_hdr *hdr, size_t length)
hdr->reserved = 0;
}
-void mei_hbm_start_req(struct mei_device *dev);
-
+int mei_hbm_start_req(struct mei_device *dev);
+int mei_hbm_start_wait(struct mei_device *dev);
int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl);
int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl);
diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index 642c6223fa6..fc032270916 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -26,14 +26,14 @@
/**
- * mei_reg_read - Reads 32bit data from the mei device
+ * mei_me_reg_read - Reads 32bit data from the mei device
*
* @dev: the device structure
* @offset: offset from which to read the data
*
* returns register value (u32)
*/
-static inline u32 mei_reg_read(const struct mei_me_hw *hw,
+static inline u32 mei_me_reg_read(const struct mei_me_hw *hw,
unsigned long offset)
{
return ioread32(hw->mem_addr + offset);
@@ -41,20 +41,20 @@ static inline u32 mei_reg_read(const struct mei_me_hw *hw,
/**
- * mei_reg_write - Writes 32bit data to the mei device
+ * mei_me_reg_write - Writes 32bit data to the mei device
*
* @dev: the device structure
* @offset: offset from which to write the data
* @value: register value to write (u32)
*/
-static inline void mei_reg_write(const struct mei_me_hw *hw,
+static inline void mei_me_reg_write(const struct mei_me_hw *hw,
unsigned long offset, u32 value)
{
iowrite32(value, hw->mem_addr + offset);
}
/**
- * mei_mecbrw_read - Reads 32bit data from ME circular buffer
+ * mei_me_mecbrw_read - Reads 32bit data from ME circular buffer
* read window register
*
* @dev: the device structure
@@ -63,18 +63,18 @@ static inline void mei_reg_write(const struct mei_me_hw *hw,
*/
static u32 mei_me_mecbrw_read(const struct mei_device *dev)
{
- return mei_reg_read(to_me_hw(dev), ME_CB_RW);
+ return mei_me_reg_read(to_me_hw(dev), ME_CB_RW);
}
/**
- * mei_mecsr_read - Reads 32bit data from the ME CSR
+ * mei_me_mecsr_read - Reads 32bit data from the ME CSR
*
* @dev: the device structure
*
* returns ME_CSR_HA register value (u32)
*/
-static inline u32 mei_mecsr_read(const struct mei_me_hw *hw)
+static inline u32 mei_me_mecsr_read(const struct mei_me_hw *hw)
{
- return mei_reg_read(hw, ME_CSR_HA);
+ return mei_me_reg_read(hw, ME_CSR_HA);
}
/**
@@ -86,7 +86,7 @@ static inline u32 mei_mecsr_read(const struct mei_me_hw *hw)
*/
static inline u32 mei_hcsr_read(const struct mei_me_hw *hw)
{
- return mei_reg_read(hw, H_CSR);
+ return mei_me_reg_read(hw, H_CSR);
}
/**
@@ -98,7 +98,7 @@ static inline u32 mei_hcsr_read(const struct mei_me_hw *hw)
static inline void mei_hcsr_set(struct mei_me_hw *hw, u32 hcsr)
{
hcsr &= ~H_IS;
- mei_reg_write(hw, H_CSR, hcsr);
+ mei_me_reg_write(hw, H_CSR, hcsr);
}
@@ -123,7 +123,7 @@ static void mei_me_intr_clear(struct mei_device *dev)
struct mei_me_hw *hw = to_me_hw(dev);
u32 hcsr = mei_hcsr_read(hw);
if ((hcsr & H_IS) == H_IS)
- mei_reg_write(hw, H_CSR, hcsr);
+ mei_me_reg_write(hw, H_CSR, hcsr);
}
/**
* mei_me_intr_enable - enables mei device interrupts
@@ -228,10 +228,42 @@ static bool mei_me_host_is_ready(struct mei_device *dev)
static bool mei_me_hw_is_ready(struct mei_device *dev)
{
struct mei_me_hw *hw = to_me_hw(dev);
- hw->me_hw_state = mei_mecsr_read(hw);
+ hw->me_hw_state = mei_me_mecsr_read(hw);
return (hw->me_hw_state & ME_RDY_HRA) == ME_RDY_HRA;
}
+static int mei_me_hw_ready_wait(struct mei_device *dev)
+{
+ int err;
+ if (mei_me_hw_is_ready(dev))
+ return 0;
+
+ mutex_unlock(&dev->device_lock);
+ err = wait_event_interruptible_timeout(dev->wait_hw_ready,
+ dev->recvd_hw_ready, MEI_INTEROP_TIMEOUT);
+ mutex_lock(&dev->device_lock);
+ if (!err && !dev->recvd_hw_ready) {
+ dev_err(&dev->pdev->dev,
+ "wait hw ready failed. status = 0x%x\n", err);
+ return -ETIMEDOUT;
+ }
+
+ dev->recvd_hw_ready = false;
+ return 0;
+}
+
+static int mei_me_hw_start(struct mei_device *dev)
+{
+ int ret = mei_me_hw_ready_wait(dev);
+ if (ret)
+ return ret;
+ dev_dbg(&dev->pdev->dev, "hw is ready\n");
+
+ mei_me_host_set_ready(dev);
+ return ret;
+}
+
+
/**
* mei_hbuf_filled_slots - gets number of device filled buffer slots
*
@@ -305,10 +337,11 @@ static int mei_me_write_message(struct mei_device *dev,
unsigned char *buf)
{
struct mei_me_hw *hw = to_me_hw(dev);
- unsigned long rem, dw_cnt;
+ unsigned long rem;
unsigned long length = header->length;
u32 *reg_buf = (u32 *)buf;
u32 hcsr;
+ u32 dw_cnt;
int i;
int empty_slots;
@@ -321,16 +354,16 @@ static int mei_me_write_message(struct mei_device *dev,
if (empty_slots < 0 || dw_cnt > empty_slots)
return -EIO;
- mei_reg_write(hw, H_CB_WW, *((u32 *) header));
+ mei_me_reg_write(hw, H_CB_WW, *((u32 *) header));
for (i = 0; i < length / 4; i++)
- mei_reg_write(hw, H_CB_WW, reg_buf[i]);
+ mei_me_reg_write(hw, H_CB_WW, reg_buf[i]);
rem = length & 0x3;
if (rem > 0) {
u32 reg = 0;
memcpy(&reg, &buf[length - rem], rem);
- mei_reg_write(hw, H_CB_WW, reg);
+ mei_me_reg_write(hw, H_CB_WW, reg);
}
hcsr = mei_hcsr_read(hw) | H_IG;
@@ -354,7 +387,7 @@ static int mei_me_count_full_read_slots(struct mei_device *dev)
char read_ptr, write_ptr;
unsigned char buffer_depth, filled_slots;
- hw->me_hw_state = mei_mecsr_read(hw);
+ hw->me_hw_state = mei_me_mecsr_read(hw);
buffer_depth = (unsigned char)((hw->me_hw_state & ME_CBD_HRA) >> 24);
read_ptr = (char) ((hw->me_hw_state & ME_CBRP_HRA) >> 8);
write_ptr = (char) ((hw->me_hw_state & ME_CBWP_HRA) >> 16);
@@ -414,7 +447,7 @@ irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id)
return IRQ_NONE;
/* clear H_IS bit in H_CSR */
- mei_reg_write(hw, H_CSR, csr_reg);
+ mei_me_reg_write(hw, H_CSR, csr_reg);
return IRQ_WAKE_THREAD;
}
@@ -433,12 +466,8 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
{
struct mei_device *dev = (struct mei_device *) dev_id;
struct mei_cl_cb complete_list;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
- struct mei_cl *cl;
s32 slots;
int rets;
- bool bus_message_received;
-
dev_dbg(&dev->pdev->dev, "function called after ISR to handle the interrupt processing.\n");
/* initialize our complete list */
@@ -452,7 +481,7 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
/* check if ME wants a reset */
if (!mei_hw_is_ready(dev) &&
- dev->dev_state != MEI_DEV_RESETING &&
+ dev->dev_state != MEI_DEV_RESETTING &&
dev->dev_state != MEI_DEV_INITIALIZING) {
dev_dbg(&dev->pdev->dev, "FW not ready.\n");
mei_reset(dev, 1);
@@ -465,14 +494,9 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id)
if (mei_hw_is_ready(dev)) {
dev_dbg(&dev->pdev->dev, "we need to start the dev.\n");
- mei_host_set_ready(dev);
+ dev->recvd_hw_ready = true;
+ wake_up_interruptible(&dev->wait_hw_ready);
- dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
- /* link is established * start sending messages. */
-
- dev->dev_state = MEI_DEV_INIT_CLIENTS;
-
- mei_hbm_start_req(dev);
mutex_unlock(&dev->device_lock);
return IRQ_HANDLED;
} else {
@@ -499,44 +523,20 @@ end:
dev_dbg(&dev->pdev->dev, "end of bottom half function.\n");
dev->hbuf_is_ready = mei_hbuf_is_ready(dev);
- bus_message_received = false;
- if (dev->recvd_msg && waitqueue_active(&dev->wait_recvd_msg)) {
- dev_dbg(&dev->pdev->dev, "received waiting bus message\n");
- bus_message_received = true;
- }
mutex_unlock(&dev->device_lock);
- if (bus_message_received) {
- dev_dbg(&dev->pdev->dev, "wake up dev->wait_recvd_msg\n");
- wake_up_interruptible(&dev->wait_recvd_msg);
- bus_message_received = false;
- }
- if (list_empty(&complete_list.list))
- return IRQ_HANDLED;
+ mei_irq_compl_handler(dev, &complete_list);
- list_for_each_entry_safe(cb_pos, cb_next, &complete_list.list, list) {
- cl = cb_pos->cl;
- list_del(&cb_pos->list);
- if (cl) {
- if (cl != &dev->iamthif_cl) {
- dev_dbg(&dev->pdev->dev, "completing call back.\n");
- mei_irq_complete_handler(cl, cb_pos);
- cb_pos = NULL;
- } else if (cl == &dev->iamthif_cl) {
- mei_amthif_complete(dev, cb_pos);
- }
- }
- }
return IRQ_HANDLED;
}
static const struct mei_hw_ops mei_me_hw_ops = {
- .host_set_ready = mei_me_host_set_ready,
.host_is_ready = mei_me_host_is_ready,
.hw_is_ready = mei_me_hw_is_ready,
.hw_reset = mei_me_hw_reset,
- .hw_config = mei_me_hw_config,
+ .hw_config = mei_me_hw_config,
+ .hw_start = mei_me_hw_start,
.intr_clear = mei_me_intr_clear,
.intr_enable = mei_me_intr_enable,
@@ -571,14 +571,6 @@ struct mei_device *mei_me_dev_init(struct pci_dev *pdev)
mei_device_init(dev);
- INIT_LIST_HEAD(&dev->wd_cl.link);
- INIT_LIST_HEAD(&dev->iamthif_cl.link);
- mei_io_list_init(&dev->amthif_cmd_list);
- mei_io_list_init(&dev->amthif_rd_complete_list);
-
- INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
- INIT_WORK(&dev->init_work, mei_host_client_init);
-
dev->ops = &mei_me_hw_ops;
dev->pdev = pdev;
diff --git a/drivers/misc/mei/hw-me.h b/drivers/misc/mei/hw-me.h
index 8518d3eeb83..80bd829fbd9 100644
--- a/drivers/misc/mei/hw-me.h
+++ b/drivers/misc/mei/hw-me.h
@@ -36,12 +36,6 @@ struct mei_me_hw {
struct mei_device *mei_me_dev_init(struct pci_dev *pdev);
-/* get slots (dwords) from a message length + header (bytes) */
-static inline unsigned char mei_data2slots(size_t length)
-{
- return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
-}
-
irqreturn_t mei_me_irq_quick_handler(int irq, void *dev_id);
irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id);
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 356179991a2..713d89fedc4 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -14,6 +14,7 @@
*
*/
+#include <linux/export.h>
#include <linux/pci.h>
#include <linux/sched.h>
#include <linux/wait.h>
@@ -22,6 +23,7 @@
#include <linux/mei.h>
#include "mei_dev.h"
+#include "hbm.h"
#include "client.h"
const char *mei_dev_state_str(int state)
@@ -31,9 +33,8 @@ const char *mei_dev_state_str(int state)
MEI_DEV_STATE(INITIALIZING);
MEI_DEV_STATE(INIT_CLIENTS);
MEI_DEV_STATE(ENABLED);
- MEI_DEV_STATE(RESETING);
+ MEI_DEV_STATE(RESETTING);
MEI_DEV_STATE(DISABLED);
- MEI_DEV_STATE(RECOVERING_FROM_RESET);
MEI_DEV_STATE(POWER_DOWN);
MEI_DEV_STATE(POWER_UP);
default:
@@ -46,7 +47,9 @@ void mei_device_init(struct mei_device *dev)
{
/* setup our list array */
INIT_LIST_HEAD(&dev->file_list);
+ INIT_LIST_HEAD(&dev->device_list);
mutex_init(&dev->device_lock);
+ init_waitqueue_head(&dev->wait_hw_ready);
init_waitqueue_head(&dev->wait_recvd_msg);
init_waitqueue_head(&dev->wait_stop_wd);
dev->dev_state = MEI_DEV_INITIALIZING;
@@ -56,19 +59,27 @@ void mei_device_init(struct mei_device *dev)
mei_io_list_init(&dev->write_waiting_list);
mei_io_list_init(&dev->ctrl_wr_list);
mei_io_list_init(&dev->ctrl_rd_list);
+
+ INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
+ INIT_WORK(&dev->init_work, mei_host_client_init);
+
+ INIT_LIST_HEAD(&dev->wd_cl.link);
+ INIT_LIST_HEAD(&dev->iamthif_cl.link);
+ mei_io_list_init(&dev->amthif_cmd_list);
+ mei_io_list_init(&dev->amthif_rd_complete_list);
+
}
+EXPORT_SYMBOL_GPL(mei_device_init);
/**
- * mei_hw_init - initializes host and fw to start work.
+ * mei_start - initializes host and fw to start work.
*
* @dev: the device structure
*
* returns 0 on success, <0 on failure.
*/
-int mei_hw_init(struct mei_device *dev)
+int mei_start(struct mei_device *dev)
{
- int ret = 0;
-
mutex_lock(&dev->device_lock);
/* acknowledge interrupt and stop interupts */
@@ -76,29 +87,15 @@ int mei_hw_init(struct mei_device *dev)
mei_hw_config(dev);
- dev->recvd_msg = false;
dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n");
mei_reset(dev, 1);
- /* wait for ME to turn on ME_RDY */
- if (!dev->recvd_msg) {
- mutex_unlock(&dev->device_lock);
- ret = wait_event_interruptible_timeout(dev->wait_recvd_msg,
- dev->recvd_msg,
- mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT));
- mutex_lock(&dev->device_lock);
- }
-
- if (ret <= 0 && !dev->recvd_msg) {
- dev->dev_state = MEI_DEV_DISABLED;
- dev_dbg(&dev->pdev->dev,
- "wait_event_interruptible_timeout failed"
- "on wait for ME to turn on ME_RDY.\n");
+ if (mei_hbm_start_wait(dev)) {
+ dev_err(&dev->pdev->dev, "HBM haven't started");
goto err;
}
-
if (!mei_host_is_ready(dev)) {
dev_err(&dev->pdev->dev, "host is not ready.\n");
goto err;
@@ -115,7 +112,6 @@ int mei_hw_init(struct mei_device *dev)
goto err;
}
- dev->recvd_msg = false;
dev_dbg(&dev->pdev->dev, "link layer has been established.\n");
mutex_unlock(&dev->device_lock);
@@ -126,6 +122,7 @@ err:
mutex_unlock(&dev->device_lock);
return -ENODEV;
}
+EXPORT_SYMBOL_GPL(mei_start);
/**
* mei_reset - resets host and fw.
@@ -137,9 +134,6 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
{
bool unexpected;
- if (dev->dev_state == MEI_DEV_RECOVERING_FROM_RESET)
- return;
-
unexpected = (dev->dev_state != MEI_DEV_INITIALIZING &&
dev->dev_state != MEI_DEV_DISABLED &&
dev->dev_state != MEI_DEV_POWER_DOWN &&
@@ -147,11 +141,12 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
mei_hw_reset(dev, interrupts_enabled);
+ dev->hbm_state = MEI_HBM_IDLE;
if (dev->dev_state != MEI_DEV_INITIALIZING) {
if (dev->dev_state != MEI_DEV_DISABLED &&
dev->dev_state != MEI_DEV_POWER_DOWN)
- dev->dev_state = MEI_DEV_RESETING;
+ dev->dev_state = MEI_DEV_RESETTING;
mei_cl_all_disconnect(dev);
@@ -176,12 +171,27 @@ void mei_reset(struct mei_device *dev, int interrupts_enabled)
dev_warn(&dev->pdev->dev, "unexpected reset: dev_state = %s\n",
mei_dev_state_str(dev->dev_state));
+ if (!interrupts_enabled) {
+ dev_dbg(&dev->pdev->dev, "intr not enabled end of reset\n");
+ return;
+ }
+
+ mei_hw_start(dev);
+
+ dev_dbg(&dev->pdev->dev, "link is established start sending messages.\n");
+ /* link is established * start sending messages. */
+
+ dev->dev_state = MEI_DEV_INIT_CLIENTS;
+
+ mei_hbm_start_req(dev);
+
/* wake up all readings so they can be interrupted */
mei_cl_all_read_wakeup(dev);
/* remove all waiting requests */
mei_cl_all_write_clear(dev);
}
+EXPORT_SYMBOL_GPL(mei_reset);
void mei_stop(struct mei_device *dev)
{
@@ -193,14 +203,18 @@ void mei_stop(struct mei_device *dev)
mei_wd_stop(dev);
+ mei_nfc_host_exit();
+
dev->dev_state = MEI_DEV_POWER_DOWN;
mei_reset(dev, 0);
mutex_unlock(&dev->device_lock);
flush_scheduled_work();
-}
+ mei_watchdog_unregister(dev);
+}
+EXPORT_SYMBOL_GPL(mei_stop);
diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c
index 3535b2676c9..1473cfdbc42 100644
--- a/drivers/misc/mei/interrupt.c
+++ b/drivers/misc/mei/interrupt.c
@@ -15,6 +15,7 @@
*/
+#include <linux/export.h>
#include <linux/pci.h>
#include <linux/kthread.h>
#include <linux/interrupt.h>
@@ -30,103 +31,153 @@
/**
- * mei_complete_handler - processes completed operation.
+ * mei_cl_complete_handler - processes completed operation for a client
*
* @cl: private data of the file object.
- * @cb_pos: callback block.
+ * @cb: callback block.
*/
-void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos)
+static void mei_cl_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb)
{
- if (cb_pos->fop_type == MEI_FOP_WRITE) {
- mei_io_cb_free(cb_pos);
- cb_pos = NULL;
+ if (cb->fop_type == MEI_FOP_WRITE) {
+ mei_io_cb_free(cb);
+ cb = NULL;
cl->writing_state = MEI_WRITE_COMPLETE;
if (waitqueue_active(&cl->tx_wait))
wake_up_interruptible(&cl->tx_wait);
- } else if (cb_pos->fop_type == MEI_FOP_READ &&
+ } else if (cb->fop_type == MEI_FOP_READ &&
MEI_READING == cl->reading_state) {
cl->reading_state = MEI_READ_COMPLETE;
if (waitqueue_active(&cl->rx_wait))
wake_up_interruptible(&cl->rx_wait);
+ else
+ mei_cl_bus_rx_event(cl);
+
+ }
+}
+
+/**
+ * mei_irq_compl_handler - dispatch complete handelers
+ * for the completed callbacks
+ *
+ * @dev - mei device
+ * @compl_list - list of completed cbs
+ */
+void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *compl_list)
+{
+ struct mei_cl_cb *cb, *next;
+ struct mei_cl *cl;
+
+ list_for_each_entry_safe(cb, next, &compl_list->list, list) {
+ cl = cb->cl;
+ list_del(&cb->list);
+ if (!cl)
+ continue;
+ dev_dbg(&dev->pdev->dev, "completing call back.\n");
+ if (cl == &dev->iamthif_cl)
+ mei_amthif_complete(dev, cb);
+ else
+ mei_cl_complete_handler(cl, cb);
}
}
+EXPORT_SYMBOL_GPL(mei_irq_compl_handler);
/**
- * _mei_irq_thread_state_ok - checks if mei header matches file private data
+ * mei_cl_hbm_equal - check if hbm is addressed to the client
*
- * @cl: private data of the file object
+ * @cl: host client
* @mei_hdr: header of mei client message
*
- * returns !=0 if matches, 0 if no match.
+ * returns true if matches, false otherwise
+ */
+static inline int mei_cl_hbm_equal(struct mei_cl *cl,
+ struct mei_msg_hdr *mei_hdr)
+{
+ return cl->host_client_id == mei_hdr->host_addr &&
+ cl->me_client_id == mei_hdr->me_addr;
+}
+/**
+ * mei_cl_is_reading - checks if the client
+ is the one to read this message
+ *
+ * @cl: mei client
+ * @mei_hdr: header of mei message
+ *
+ * returns true on match and false otherwise
*/
-static int _mei_irq_thread_state_ok(struct mei_cl *cl,
- struct mei_msg_hdr *mei_hdr)
+static bool mei_cl_is_reading(struct mei_cl *cl, struct mei_msg_hdr *mei_hdr)
{
- return (cl->host_client_id == mei_hdr->host_addr &&
- cl->me_client_id == mei_hdr->me_addr &&
+ return mei_cl_hbm_equal(cl, mei_hdr) &&
cl->state == MEI_FILE_CONNECTED &&
- MEI_READ_COMPLETE != cl->reading_state);
+ cl->reading_state != MEI_READ_COMPLETE;
}
/**
- * mei_irq_thread_read_client_message - bottom half read routine after ISR to
- * handle the read mei client message data processing.
+ * mei_irq_read_client_message - process client message
*
- * @complete_list: An instance of our list structure
* @dev: the device structure
* @mei_hdr: header of mei client message
+ * @complete_list: An instance of our list structure
*
* returns 0 on success, <0 on failure.
*/
-static int mei_irq_thread_read_client_message(struct mei_cl_cb *complete_list,
- struct mei_device *dev,
- struct mei_msg_hdr *mei_hdr)
+static int mei_cl_irq_read_msg(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr,
+ struct mei_cl_cb *complete_list)
{
struct mei_cl *cl;
- struct mei_cl_cb *cb_pos = NULL, *cb_next = NULL;
+ struct mei_cl_cb *cb, *next;
unsigned char *buffer = NULL;
- dev_dbg(&dev->pdev->dev, "start client msg\n");
- if (list_empty(&dev->read_list.list))
- goto quit;
+ list_for_each_entry_safe(cb, next, &dev->read_list.list, list) {
+ cl = cb->cl;
+ if (!cl || !mei_cl_is_reading(cl, mei_hdr))
+ continue;
- list_for_each_entry_safe(cb_pos, cb_next, &dev->read_list.list, list) {
- cl = cb_pos->cl;
- if (cl && _mei_irq_thread_state_ok(cl, mei_hdr)) {
- cl->reading_state = MEI_READING;
- buffer = cb_pos->response_buffer.data + cb_pos->buf_idx;
+ cl->reading_state = MEI_READING;
- if (cb_pos->response_buffer.size <
- mei_hdr->length + cb_pos->buf_idx) {
- dev_dbg(&dev->pdev->dev, "message overflow.\n");
- list_del(&cb_pos->list);
+ if (cb->response_buffer.size == 0 ||
+ cb->response_buffer.data == NULL) {
+ dev_err(&dev->pdev->dev, "response buffer is not allocated.\n");
+ list_del(&cb->list);
+ return -ENOMEM;
+ }
+
+ if (cb->response_buffer.size < mei_hdr->length + cb->buf_idx) {
+ dev_dbg(&dev->pdev->dev, "message overflow. size %d len %d idx %ld\n",
+ cb->response_buffer.size,
+ mei_hdr->length, cb->buf_idx);
+ buffer = krealloc(cb->response_buffer.data,
+ mei_hdr->length + cb->buf_idx,
+ GFP_KERNEL);
+
+ if (!buffer) {
+ dev_err(&dev->pdev->dev, "allocation failed.\n");
+ list_del(&cb->list);
return -ENOMEM;
}
- if (buffer)
- mei_read_slots(dev, buffer, mei_hdr->length);
-
- cb_pos->buf_idx += mei_hdr->length;
- if (mei_hdr->msg_complete) {
- cl->status = 0;
- list_del(&cb_pos->list);
- dev_dbg(&dev->pdev->dev,
- "completed read H cl = %d, ME cl = %d, length = %lu\n",
- cl->host_client_id,
- cl->me_client_id,
- cb_pos->buf_idx);
-
- list_add_tail(&cb_pos->list,
- &complete_list->list);
- }
-
- break;
+ cb->response_buffer.data = buffer;
+ cb->response_buffer.size =
+ mei_hdr->length + cb->buf_idx;
}
+ buffer = cb->response_buffer.data + cb->buf_idx;
+ mei_read_slots(dev, buffer, mei_hdr->length);
+
+ cb->buf_idx += mei_hdr->length;
+ if (mei_hdr->msg_complete) {
+ cl->status = 0;
+ list_del(&cb->list);
+ dev_dbg(&dev->pdev->dev, "completed read H cl = %d, ME cl = %d, length = %lu\n",
+ cl->host_client_id,
+ cl->me_client_id,
+ cb->buf_idx);
+ list_add_tail(&cb->list, &complete_list->list);
+ }
+ break;
}
-quit:
dev_dbg(&dev->pdev->dev, "message read\n");
if (!buffer) {
mei_read_slots(dev, dev->rd_msg_buf, mei_hdr->length);
@@ -153,25 +204,27 @@ static int _mei_irq_thread_close(struct mei_device *dev, s32 *slots,
struct mei_cl *cl,
struct mei_cl_cb *cmpl_list)
{
- if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_connect_request)))
- return -EBADMSG;
+ u32 msg_slots =
+ mei_data2slots(sizeof(struct hbm_client_connect_request));
- *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
+ if (*slots < msg_slots)
+ return -EMSGSIZE;
+
+ *slots -= msg_slots;
if (mei_hbm_cl_disconnect_req(dev, cl)) {
cl->status = 0;
cb_pos->buf_idx = 0;
list_move_tail(&cb_pos->list, &cmpl_list->list);
- return -EMSGSIZE;
- } else {
- cl->state = MEI_FILE_DISCONNECTING;
- cl->status = 0;
- cb_pos->buf_idx = 0;
- list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list);
- cl->timer_count = MEI_CONNECT_TIMEOUT;
+ return -EIO;
}
+ cl->state = MEI_FILE_DISCONNECTING;
+ cl->status = 0;
+ cb_pos->buf_idx = 0;
+ list_move_tail(&cb_pos->list, &dev->ctrl_rd_list.list);
+ cl->timer_count = MEI_CONNECT_TIMEOUT;
+
return 0;
}
@@ -192,14 +245,15 @@ static int _mei_irq_thread_read(struct mei_device *dev, s32 *slots,
struct mei_cl *cl,
struct mei_cl_cb *cmpl_list)
{
- if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_flow_control))) {
+ u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control));
+
+ if (*slots < msg_slots) {
/* return the cancel routine */
list_del(&cb_pos->list);
- return -EBADMSG;
+ return -EMSGSIZE;
}
- *slots -= mei_data2slots(sizeof(struct hbm_flow_control));
+ *slots -= msg_slots;
if (mei_hbm_cl_flow_control_req(dev, cl)) {
cl->status = -ENODEV;
@@ -229,15 +283,19 @@ static int _mei_irq_thread_ioctl(struct mei_device *dev, s32 *slots,
struct mei_cl *cl,
struct mei_cl_cb *cmpl_list)
{
- if ((*slots * sizeof(u32)) < (sizeof(struct mei_msg_hdr) +
- sizeof(struct hbm_client_connect_request))) {
+ u32 msg_slots =
+ mei_data2slots(sizeof(struct hbm_client_connect_request));
+
+ if (*slots < msg_slots) {
/* return the cancel routine */
list_del(&cb_pos->list);
- return -EBADMSG;
+ return -EMSGSIZE;
}
+ *slots -= msg_slots;
+
cl->state = MEI_FILE_CONNECTING;
- *slots -= mei_data2slots(sizeof(struct hbm_client_connect_request));
+
if (mei_hbm_cl_connect_req(dev, cl)) {
cl->status = -ENODEV;
cb_pos->buf_idx = 0;
@@ -266,7 +324,7 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots,
struct mei_msg_hdr mei_hdr;
struct mei_cl *cl = cb->cl;
size_t len = cb->request_buffer.size - cb->buf_idx;
- size_t msg_slots = mei_data2slots(len);
+ u32 msg_slots = mei_data2slots(len);
mei_hdr.host_addr = cl->host_client_id;
mei_hdr.me_addr = cl->me_client_id;
@@ -298,13 +356,14 @@ static int mei_irq_thread_write_complete(struct mei_device *dev, s32 *slots,
return -ENODEV;
}
- if (mei_cl_flow_ctrl_reduce(cl))
- return -ENODEV;
cl->status = 0;
cb->buf_idx += mei_hdr.length;
- if (mei_hdr.msg_complete)
+ if (mei_hdr.msg_complete) {
+ if (mei_cl_flow_ctrl_reduce(cl))
+ return -ENODEV;
list_move_tail(&cb->list, &dev->write_waiting_list.list);
+ }
return 0;
}
@@ -350,8 +409,7 @@ int mei_irq_read_handler(struct mei_device *dev,
" client = %d, ME client = %d\n",
cl_pos->host_client_id,
cl_pos->me_client_id);
- if (cl_pos->host_client_id == mei_hdr->host_addr &&
- cl_pos->me_client_id == mei_hdr->me_addr)
+ if (mei_cl_hbm_equal(cl_pos, mei_hdr))
break;
}
@@ -362,7 +420,7 @@ int mei_irq_read_handler(struct mei_device *dev,
}
}
if (((*slots) * sizeof(u32)) < mei_hdr->length) {
- dev_dbg(&dev->pdev->dev,
+ dev_err(&dev->pdev->dev,
"we can't read the message slots =%08x.\n",
*slots);
/* we can't read the message */
@@ -378,20 +436,19 @@ int mei_irq_read_handler(struct mei_device *dev,
} else if (mei_hdr->host_addr == dev->iamthif_cl.host_client_id &&
(MEI_FILE_CONNECTED == dev->iamthif_cl.state) &&
(dev->iamthif_state == MEI_IAMTHIF_READING)) {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
+ dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_iamthif_message.\n");
dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
- ret = mei_amthif_irq_read_message(cmpl_list, dev, mei_hdr);
+ ret = mei_amthif_irq_read_msg(dev, mei_hdr, cmpl_list);
if (ret)
goto end;
} else {
- dev_dbg(&dev->pdev->dev, "call mei_irq_thread_read_client_message.\n");
- ret = mei_irq_thread_read_client_message(cmpl_list,
- dev, mei_hdr);
+ dev_dbg(&dev->pdev->dev, "call mei_cl_irq_read_msg.\n");
+ dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(mei_hdr));
+ ret = mei_cl_irq_read_msg(dev, mei_hdr, cmpl_list);
if (ret)
goto end;
-
}
/* reset the number of slots and header */
@@ -400,7 +457,7 @@ int mei_irq_read_handler(struct mei_device *dev,
if (*slots == -EOVERFLOW) {
/* overflow - reset */
- dev_dbg(&dev->pdev->dev, "resetting due to slots overflow.\n");
+ dev_err(&dev->pdev->dev, "resetting due to slots overflow.\n");
/* set the event since message has been read */
ret = -ERANGE;
goto end;
@@ -408,6 +465,7 @@ int mei_irq_read_handler(struct mei_device *dev,
end:
return ret;
}
+EXPORT_SYMBOL_GPL(mei_irq_read_handler);
/**
@@ -419,8 +477,7 @@ end:
*
* returns 0 on success, <0 on failure.
*/
-int mei_irq_write_handler(struct mei_device *dev,
- struct mei_cl_cb *cmpl_list)
+int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list)
{
struct mei_cl *cl;
@@ -559,6 +616,7 @@ int mei_irq_write_handler(struct mei_device *dev,
}
return 0;
}
+EXPORT_SYMBOL_GPL(mei_irq_write_handler);
@@ -586,8 +644,8 @@ void mei_timer(struct work_struct *work)
if (dev->dev_state == MEI_DEV_INIT_CLIENTS) {
if (dev->init_clients_timer) {
if (--dev->init_clients_timer == 0) {
- dev_dbg(&dev->pdev->dev, "IMEI reset due to init clients timeout ,init clients state = %d.\n",
- dev->init_clients_state);
+ dev_err(&dev->pdev->dev, "reset: init clients timeout hbm_state = %d.\n",
+ dev->hbm_state);
mei_reset(dev, 1);
}
}
@@ -598,7 +656,7 @@ void mei_timer(struct work_struct *work)
list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) {
if (cl_pos->timer_count) {
if (--cl_pos->timer_count == 0) {
- dev_dbg(&dev->pdev->dev, "HECI reset due to connect/disconnect timeout.\n");
+ dev_err(&dev->pdev->dev, "reset: connect/disconnect timeout.\n");
mei_reset(dev, 1);
goto out;
}
@@ -607,7 +665,7 @@ void mei_timer(struct work_struct *work)
if (dev->iamthif_stall_timer) {
if (--dev->iamthif_stall_timer == 0) {
- dev_dbg(&dev->pdev->dev, "resetting because of hang to amthi.\n");
+ dev_err(&dev->pdev->dev, "reset: amthif hanged.\n");
mei_reset(dev, 1);
dev->iamthif_msg_buf_size = 0;
dev->iamthif_msg_buf_index = 0;
diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 903f809b21f..7c44c8dbae4 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -48,7 +48,7 @@
*
* @inode: pointer to inode structure
* @file: pointer to file structure
- *
+ e
* returns 0 on success, <0 on error
*/
static int mei_open(struct inode *inode, struct file *file)
@@ -244,7 +244,7 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
goto out;
}
- err = mei_cl_read_start(cl);
+ err = mei_cl_read_start(cl, length);
if (err && err != -EBUSY) {
dev_dbg(&dev->pdev->dev,
"mei start read failure with status = %d\n", err);
@@ -292,9 +292,8 @@ static ssize_t mei_read(struct file *file, char __user *ubuf,
}
/* now copy the data to user space */
copy_buffer:
- dev_dbg(&dev->pdev->dev, "cb->response_buffer size - %d\n",
- cb->response_buffer.size);
- dev_dbg(&dev->pdev->dev, "cb->buf_idx - %lu\n", cb->buf_idx);
+ dev_dbg(&dev->pdev->dev, "buf.size = %d buf.idx= %ld\n",
+ cb->response_buffer.size, cb->buf_idx);
if (length == 0 || ubuf == NULL || *offset > cb->buf_idx) {
rets = -EMSGSIZE;
goto free;
@@ -342,11 +341,10 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
{
struct mei_cl *cl = file->private_data;
struct mei_cl_cb *write_cb = NULL;
- struct mei_msg_hdr mei_hdr;
struct mei_device *dev;
unsigned long timeout = 0;
int rets;
- int i;
+ int id;
if (WARN_ON(!cl || !cl->dev))
return -ENODEV;
@@ -357,24 +355,24 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
if (dev->dev_state != MEI_DEV_ENABLED) {
rets = -ENODEV;
- goto err;
+ goto out;
}
- i = mei_me_cl_by_id(dev, cl->me_client_id);
- if (i < 0) {
+ id = mei_me_cl_by_id(dev, cl->me_client_id);
+ if (id < 0) {
rets = -ENODEV;
- goto err;
+ goto out;
}
- if (length > dev->me_clients[i].props.max_msg_length || length <= 0) {
+ if (length > dev->me_clients[id].props.max_msg_length || length <= 0) {
rets = -EMSGSIZE;
- goto err;
+ goto out;
}
if (cl->state != MEI_FILE_CONNECTED) {
- rets = -ENODEV;
dev_err(&dev->pdev->dev, "host client = %d, is not connected to ME client = %d",
cl->host_client_id, cl->me_client_id);
- goto err;
+ rets = -ENODEV;
+ goto out;
}
if (cl == &dev->iamthif_cl) {
write_cb = mei_amthif_find_read_list_entry(dev, file);
@@ -412,17 +410,15 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
if (!write_cb) {
dev_err(&dev->pdev->dev, "write cb allocation failed\n");
rets = -ENOMEM;
- goto err;
+ goto out;
}
rets = mei_io_cb_alloc_req_buf(write_cb, length);
if (rets)
- goto err;
-
- dev_dbg(&dev->pdev->dev, "cb request size = %zd\n", length);
+ goto out;
rets = copy_from_user(write_cb->request_buffer.data, ubuf, length);
if (rets)
- goto err;
+ goto out;
cl->sm_state = 0;
if (length == 4 &&
@@ -440,65 +436,17 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf,
if (rets) {
dev_err(&dev->pdev->dev,
"amthif write failed with status = %d\n", rets);
- goto err;
+ goto out;
}
mutex_unlock(&dev->device_lock);
return length;
}
- write_cb->fop_type = MEI_FOP_WRITE;
-
- dev_dbg(&dev->pdev->dev, "host client = %d, ME client = %d\n",
- cl->host_client_id, cl->me_client_id);
- rets = mei_cl_flow_ctrl_creds(cl);
- if (rets < 0)
- goto err;
-
- if (rets == 0 || !dev->hbuf_is_ready) {
- write_cb->buf_idx = 0;
- mei_hdr.msg_complete = 0;
- cl->writing_state = MEI_WRITING;
- goto out;
- }
-
- dev->hbuf_is_ready = false;
- if (length > mei_hbuf_max_len(dev)) {
- mei_hdr.length = mei_hbuf_max_len(dev);
- mei_hdr.msg_complete = 0;
- } else {
- mei_hdr.length = length;
- mei_hdr.msg_complete = 1;
- }
- mei_hdr.host_addr = cl->host_client_id;
- mei_hdr.me_addr = cl->me_client_id;
- mei_hdr.reserved = 0;
-
- dev_dbg(&dev->pdev->dev, "write " MEI_HDR_FMT "\n",
- MEI_HDR_PRM(&mei_hdr));
- if (mei_write_message(dev, &mei_hdr, write_cb->request_buffer.data)) {
- rets = -ENODEV;
- goto err;
- }
- cl->writing_state = MEI_WRITING;
- write_cb->buf_idx = mei_hdr.length;
-
+ rets = mei_cl_write(cl, write_cb, false);
out:
- if (mei_hdr.msg_complete) {
- if (mei_cl_flow_ctrl_reduce(cl)) {
- rets = -ENODEV;
- goto err;
- }
- list_add_tail(&write_cb->list, &dev->write_waiting_list.list);
- } else {
- list_add_tail(&write_cb->list, &dev->write_list.list);
- }
-
mutex_unlock(&dev->device_lock);
- return length;
-
-err:
- mutex_unlock(&dev->device_lock);
- mei_io_cb_free(write_cb);
+ if (rets < 0)
+ mei_io_cb_free(write_cb);
return rets;
}
@@ -753,17 +701,44 @@ static struct miscdevice mei_misc_device = {
.minor = MISC_DYNAMIC_MINOR,
};
-int mei_register(struct device *dev)
+
+int mei_register(struct mei_device *dev)
{
- mei_misc_device.parent = dev;
- return misc_register(&mei_misc_device);
+ int ret;
+ mei_misc_device.parent = &dev->pdev->dev;
+ ret = misc_register(&mei_misc_device);
+ if (ret)
+ return ret;
+
+ if (mei_dbgfs_register(dev, mei_misc_device.name))
+ dev_err(&dev->pdev->dev, "cannot register debugfs\n");
+
+ return 0;
}
+EXPORT_SYMBOL_GPL(mei_register);
-void mei_deregister(void)
+void mei_deregister(struct mei_device *dev)
{
+ mei_dbgfs_deregister(dev);
misc_deregister(&mei_misc_device);
mei_misc_device.parent = NULL;
}
+EXPORT_SYMBOL_GPL(mei_deregister);
+
+static int __init mei_init(void)
+{
+ return mei_cl_bus_init();
+}
+
+static void __exit mei_exit(void)
+{
+ mei_cl_bus_exit();
+}
+
+module_init(mei_init);
+module_exit(mei_exit);
+MODULE_AUTHOR("Intel Corporation");
+MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 97873812e33..4de5140e737 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -21,9 +21,11 @@
#include <linux/watchdog.h>
#include <linux/poll.h>
#include <linux/mei.h>
+#include <linux/mei_cl_bus.h>
#include "hw.h"
#include "hw-me-regs.h"
+#include "hbm.h"
/*
* watch dog definition
@@ -95,22 +97,14 @@ enum mei_dev_state {
MEI_DEV_INITIALIZING = 0,
MEI_DEV_INIT_CLIENTS,
MEI_DEV_ENABLED,
- MEI_DEV_RESETING,
+ MEI_DEV_RESETTING,
MEI_DEV_DISABLED,
- MEI_DEV_RECOVERING_FROM_RESET,
MEI_DEV_POWER_DOWN,
MEI_DEV_POWER_UP
};
const char *mei_dev_state_str(int state);
-/* init clients states*/
-enum mei_init_clients_states {
- MEI_START_MESSAGE = 0,
- MEI_ENUM_CLIENTS_MESSAGE,
- MEI_CLIENT_PROPERTIES_MESSAGE
-};
-
enum iamthif_states {
MEI_IAMTHIF_IDLE,
MEI_IAMTHIF_WRITING,
@@ -153,7 +147,7 @@ enum mei_cb_file_ops {
/*
* Intel MEI message data struct
*/
-struct mei_message_data {
+struct mei_msg_data {
u32 size;
unsigned char *data;
};
@@ -184,8 +178,8 @@ struct mei_cl_cb {
struct list_head list;
struct mei_cl *cl;
enum mei_cb_file_ops fop_type;
- struct mei_message_data request_buffer;
- struct mei_message_data response_buffer;
+ struct mei_msg_data request_buffer;
+ struct mei_msg_data response_buffer;
unsigned long buf_idx;
unsigned long read_time;
struct file *file_object;
@@ -209,15 +203,20 @@ struct mei_cl {
enum mei_file_transaction_states writing_state;
int sm_state;
struct mei_cl_cb *read_cb;
+
+ /* MEI CL bus data */
+ struct mei_cl_device *device;
+ struct list_head device_link;
+ uuid_le device_uuid;
};
/** struct mei_hw_ops
*
- * @host_set_ready - notify FW that host side is ready
* @host_is_ready - query for host readiness
* @hw_is_ready - query if hw is ready
* @hw_reset - reset hw
+ * @hw_start - start hw after reset
* @hw_config - configure hw
* @intr_clear - clear pending interrupts
@@ -237,11 +236,11 @@ struct mei_cl {
*/
struct mei_hw_ops {
- void (*host_set_ready) (struct mei_device *dev);
bool (*host_is_ready) (struct mei_device *dev);
bool (*hw_is_ready) (struct mei_device *dev);
void (*hw_reset) (struct mei_device *dev, bool enable);
+ int (*hw_start) (struct mei_device *dev);
void (*hw_config) (struct mei_device *dev);
void (*intr_clear) (struct mei_device *dev);
@@ -263,9 +262,77 @@ struct mei_hw_ops {
unsigned char *buf, unsigned long len);
};
+/* MEI bus API*/
+
+/**
+ * struct mei_cl_ops - MEI CL device ops
+ * This structure allows ME host clients to implement technology
+ * specific operations.
+ *
+ * @enable: Enable an MEI CL device. Some devices require specific
+ * HECI commands to initialize completely.
+ * @disable: Disable an MEI CL device.
+ * @send: Tx hook for the device. This allows ME host clients to trap
+ * the device driver buffers before actually physically
+ * pushing it to the ME.
+ * @recv: Rx hook for the device. This allows ME host clients to trap the
+ * ME buffers before forwarding them to the device driver.
+ */
+struct mei_cl_ops {
+ int (*enable)(struct mei_cl_device *device);
+ int (*disable)(struct mei_cl_device *device);
+ int (*send)(struct mei_cl_device *device, u8 *buf, size_t length);
+ int (*recv)(struct mei_cl_device *device, u8 *buf, size_t length);
+};
+
+struct mei_cl_device *mei_cl_add_device(struct mei_device *dev,
+ uuid_le uuid, char *name,
+ struct mei_cl_ops *ops);
+void mei_cl_remove_device(struct mei_cl_device *device);
+
+int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length);
+int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length);
+int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length);
+void mei_cl_bus_rx_event(struct mei_cl *cl);
+int mei_cl_bus_init(void);
+void mei_cl_bus_exit(void);
+
+
+/**
+ * struct mei_cl_device - MEI device handle
+ * An mei_cl_device pointer is returned from mei_add_device()
+ * and links MEI bus clients to their actual ME host client pointer.
+ * Drivers for MEI devices will get an mei_cl_device pointer
+ * when being probed and shall use it for doing ME bus I/O.
+ *
+ * @dev: linux driver model device pointer
+ * @uuid: me client uuid
+ * @cl: mei client
+ * @ops: ME transport ops
+ * @event_cb: Drivers register this callback to get asynchronous ME
+ * events (e.g. Rx buffer pending) notifications.
+ * @events: Events bitmask sent to the driver.
+ * @priv_data: client private data
+ */
+struct mei_cl_device {
+ struct device dev;
+
+ struct mei_cl *cl;
+
+ const struct mei_cl_ops *ops;
+
+ struct work_struct event_work;
+ mei_cl_event_cb_t event_cb;
+ void *event_context;
+ unsigned long events;
+
+ void *priv_data;
+};
+
/**
* struct mei_device - MEI private device struct
+ * @hbm_state - state of host bus message protocol
* @mem_addr - mem mapped base register address
* @hbuf_depth - depth of hardware host/write buffer is slots
@@ -296,11 +363,12 @@ struct mei_device {
*/
struct mutex device_lock; /* device lock */
struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */
- bool recvd_msg;
+ bool recvd_hw_ready;
/*
* waiting queue for receive message from FW
*/
+ wait_queue_head_t wait_hw_ready;
wait_queue_head_t wait_recvd_msg;
wait_queue_head_t wait_stop_wd;
@@ -308,7 +376,7 @@ struct mei_device {
* mei device states
*/
enum mei_dev_state dev_state;
- enum mei_init_clients_states init_clients_state;
+ enum mei_hbm_state hbm_state;
u16 init_clients_timer;
unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */
@@ -365,6 +433,14 @@ struct mei_device {
struct work_struct init_work;
+ /* List of bus devices */
+ struct list_head device_list;
+
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+ struct dentry *dbgfs_dir;
+#endif /* CONFIG_DEBUG_FS */
+
+
const struct mei_hw_ops *ops;
char hw[0] __aligned(sizeof(void *));
};
@@ -374,13 +450,23 @@ static inline unsigned long mei_secs_to_jiffies(unsigned long sec)
return msecs_to_jiffies(sec * MSEC_PER_SEC);
}
+/**
+ * mei_data2slots - get slots - number of (dwords) from a message length
+ * + size of the mei header
+ * @length - size of the messages in bytes
+ * returns - number of slots
+ */
+static inline u32 mei_data2slots(size_t length)
+{
+ return DIV_ROUND_UP(sizeof(struct mei_msg_hdr) + length, 4);
+}
/*
* mei init function prototypes
*/
void mei_device_init(struct mei_device *dev);
void mei_reset(struct mei_device *dev, int interrupts);
-int mei_hw_init(struct mei_device *dev);
+int mei_start(struct mei_device *dev);
void mei_stop(struct mei_device *dev);
/*
@@ -392,8 +478,7 @@ int mei_irq_read_handler(struct mei_device *dev,
struct mei_cl_cb *cmpl_list, s32 *slots);
int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list);
-
-void mei_irq_complete_handler(struct mei_cl *cl, struct mei_cl_cb *cb_pos);
+void mei_irq_compl_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list);
/*
* AMTHIF - AMT Host Interface Functions
@@ -417,6 +502,25 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev,
void mei_amthif_run_next_cmd(struct mei_device *dev);
+int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
+ struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list);
+
+void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb);
+int mei_amthif_irq_read_msg(struct mei_device *dev,
+ struct mei_msg_hdr *mei_hdr,
+ struct mei_cl_cb *complete_list);
+int mei_amthif_irq_read(struct mei_device *dev, s32 *slots);
+
+/*
+ * NFC functions
+ */
+int mei_nfc_host_init(struct mei_device *dev);
+void mei_nfc_host_exit(void);
+
+/*
+ * NFC Client UUID
+ */
+extern const uuid_le mei_nfc_guid;
int mei_amthif_irq_write_complete(struct mei_device *dev, s32 *slots,
struct mei_cl_cb *cb, struct mei_cl_cb *cmpl_list);
@@ -455,6 +559,11 @@ static inline void mei_hw_reset(struct mei_device *dev, bool enable)
dev->ops->hw_reset(dev, enable);
}
+static inline void mei_hw_start(struct mei_device *dev)
+{
+ dev->ops->hw_start(dev);
+}
+
static inline void mei_clear_interrupts(struct mei_device *dev)
{
dev->ops->intr_clear(dev);
@@ -470,10 +579,6 @@ static inline void mei_disable_interrupts(struct mei_device *dev)
dev->ops->intr_disable(dev);
}
-static inline void mei_host_set_ready(struct mei_device *dev)
-{
- dev->ops->host_set_ready(dev);
-}
static inline bool mei_host_is_ready(struct mei_device *dev)
{
return dev->ops->host_is_ready(dev);
@@ -521,8 +626,19 @@ static inline int mei_count_full_read_slots(struct mei_device *dev)
return dev->ops->rdbuf_full_slots(dev);
}
-int mei_register(struct device *dev);
-void mei_deregister(void);
+#if IS_ENABLED(CONFIG_DEBUG_FS)
+int mei_dbgfs_register(struct mei_device *dev, const char *name);
+void mei_dbgfs_deregister(struct mei_device *dev);
+#else
+static inline int mei_dbgfs_register(struct mei_device *dev, const char *name)
+{
+ return 0;
+}
+static inline void mei_dbgfs_deregister(struct mei_device *dev) {}
+#endif /* CONFIG_DEBUG_FS */
+
+int mei_register(struct mei_device *dev);
+void mei_deregister(struct mei_device *dev);
#define MEI_HDR_FMT "hdr:host=%02d me=%02d len=%d comp=%1d"
#define MEI_HDR_PRM(hdr) \
diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c
new file mode 100644
index 00000000000..3adf8a70f26
--- /dev/null
+++ b/drivers/misc/mei/nfc.c
@@ -0,0 +1,554 @@
+/*
+ *
+ * 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/pci.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
+
+/** mei_nfc_dev - NFC mei device
+ *
+ * @cl: NFC host client
+ * @cl_info: NFC info host client
+ * @init_work: perform connection to the info client
+ * @fw_ivn: NFC Intervace Version Number
+ * @vendor_id: NFC manufacturer ID
+ * @radio_type: NFC radio type
+ */
+struct mei_nfc_dev {
+ struct mei_cl *cl;
+ struct mei_cl *cl_info;
+ struct work_struct init_work;
+ wait_queue_head_t send_wq;
+ u8 fw_ivn;
+ u8 vendor_id;
+ u8 radio_type;
+ char *bus_name;
+
+ u16 req_id;
+ u16 recv_req_id;
+};
+
+static struct mei_nfc_dev nfc_dev;
+
+/* 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->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);
+ }
+}
+
+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->pdev->dev, "Unknow 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->pdev->dev, "Unknow radio type 0x%x\n",
+ ndev->radio_type);
+
+ return -EINVAL;
+ }
+
+ default:
+ dev_err(&dev->pdev->dev, "Unknow vendor ID 0x%x\n",
+ ndev->vendor_id);
+
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mei_nfc_connect(struct mei_nfc_dev *ndev)
+{
+ struct mei_device *dev;
+ struct mei_cl *cl;
+ struct mei_nfc_cmd *cmd, *reply;
+ struct mei_nfc_connect *connect;
+ struct mei_nfc_connect_resp *connect_resp;
+ size_t connect_length, connect_resp_length;
+ int bytes_recv, ret;
+
+ cl = ndev->cl;
+ dev = cl->dev;
+
+ connect_length = sizeof(struct mei_nfc_cmd) +
+ sizeof(struct mei_nfc_connect);
+
+ connect_resp_length = sizeof(struct mei_nfc_cmd) +
+ sizeof(struct mei_nfc_connect_resp);
+
+ cmd = kzalloc(connect_length, GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+ connect = (struct mei_nfc_connect *)cmd->data;
+
+ reply = kzalloc(connect_resp_length, GFP_KERNEL);
+ if (!reply) {
+ kfree(cmd);
+ return -ENOMEM;
+ }
+
+ connect_resp = (struct mei_nfc_connect_resp *)reply->data;
+
+ cmd->command = MEI_NFC_CMD_MAINTENANCE;
+ cmd->data_size = 3;
+ cmd->sub_command = MEI_NFC_SUBCMD_CONNECT;
+ connect->fw_ivn = ndev->fw_ivn;
+ connect->vendor_id = ndev->vendor_id;
+
+ ret = __mei_cl_send(cl, (u8 *)cmd, connect_length);
+ if (ret < 0) {
+ dev_err(&dev->pdev->dev, "Could not send connect cmd\n");
+ goto err;
+ }
+
+ bytes_recv = __mei_cl_recv(cl, (u8 *)reply, connect_resp_length);
+ if (bytes_recv < 0) {
+ dev_err(&dev->pdev->dev, "Could not read connect response\n");
+ ret = bytes_recv;
+ goto err;
+ }
+
+ dev_info(&dev->pdev->dev, "IVN 0x%x Vendor ID 0x%x\n",
+ connect_resp->fw_ivn, connect_resp->vendor_id);
+
+ dev_info(&dev->pdev->dev, "ME FW %d.%d.%d.%d\n",
+ connect_resp->me_major, connect_resp->me_minor,
+ connect_resp->me_hotfix, connect_resp->me_build);
+
+ ret = 0;
+
+err:
+ kfree(reply);
+ kfree(cmd);
+
+ return ret;
+}
+
+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));
+ if (ret < 0) {
+ dev_err(&dev->pdev->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->pdev->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 int mei_nfc_enable(struct mei_cl_device *cldev)
+{
+ struct mei_device *dev;
+ struct mei_nfc_dev *ndev = &nfc_dev;
+ int ret;
+
+ dev = ndev->cl->dev;
+
+ ret = mei_nfc_connect(ndev);
+ if (ret < 0) {
+ dev_err(&dev->pdev->dev, "Could not connect to NFC");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int mei_nfc_disable(struct mei_cl_device *cldev)
+{
+ return 0;
+}
+
+static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
+{
+ struct mei_device *dev;
+ struct mei_nfc_dev *ndev;
+ struct mei_nfc_hci_hdr *hdr;
+ u8 *mei_buf;
+ int err;
+
+ ndev = (struct mei_nfc_dev *) cldev->priv_data;
+ dev = ndev->cl->dev;
+
+ mei_buf = kzalloc(length + MEI_NFC_HEADER_SIZE, GFP_KERNEL);
+ if (!mei_buf)
+ return -ENOMEM;
+
+ hdr = (struct mei_nfc_hci_hdr *) mei_buf;
+ hdr->cmd = MEI_NFC_CMD_HCI_SEND;
+ hdr->status = 0;
+ hdr->req_id = ndev->req_id;
+ hdr->reserved = 0;
+ hdr->data_size = length;
+
+ memcpy(mei_buf + MEI_NFC_HEADER_SIZE, buf, length);
+
+ err = __mei_cl_send(ndev->cl, mei_buf, length + MEI_NFC_HEADER_SIZE);
+ if (err < 0)
+ return err;
+
+ kfree(mei_buf);
+
+ if (!wait_event_interruptible_timeout(ndev->send_wq,
+ ndev->recv_req_id == ndev->req_id, HZ)) {
+ dev_err(&dev->pdev->dev, "NFC MEI command timeout\n");
+ err = -ETIMEDOUT;
+ } else {
+ ndev->req_id++;
+ }
+
+ return err;
+}
+
+static int mei_nfc_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
+{
+ struct mei_nfc_dev *ndev;
+ struct mei_nfc_hci_hdr *hci_hdr;
+ int received_length;
+
+ ndev = (struct mei_nfc_dev *)cldev->priv_data;
+
+ received_length = __mei_cl_recv(ndev->cl, buf, length);
+ if (received_length < 0)
+ return received_length;
+
+ hci_hdr = (struct mei_nfc_hci_hdr *) buf;
+
+ if (hci_hdr->cmd == MEI_NFC_CMD_HCI_SEND) {
+ ndev->recv_req_id = hci_hdr->req_id;
+ wake_up(&ndev->send_wq);
+
+ return 0;
+ }
+
+ return received_length;
+}
+
+static struct mei_cl_ops nfc_ops = {
+ .enable = mei_nfc_enable,
+ .disable = mei_nfc_disable,
+ .send = mei_nfc_send,
+ .recv = mei_nfc_recv,
+};
+
+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;
+
+ ndev = container_of(work, struct mei_nfc_dev, init_work);
+
+ cl_info = ndev->cl_info;
+ dev = cl_info->dev;
+
+ mutex_lock(&dev->device_lock);
+
+ if (mei_cl_connect(cl_info, NULL) < 0) {
+ mutex_unlock(&dev->device_lock);
+ dev_err(&dev->pdev->dev,
+ "Could not connect to the NFC INFO ME client");
+
+ goto err;
+ }
+
+ mutex_unlock(&dev->device_lock);
+
+ if (mei_nfc_if_version(ndev) < 0) {
+ dev_err(&dev->pdev->dev, "Could not get the NFC interfave version");
+
+ goto err;
+ }
+
+ dev_info(&dev->pdev->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->pdev->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->pdev->dev,
+ "Could not build the bus ID name\n");
+ return;
+ }
+
+ cldev = mei_cl_add_device(dev, mei_nfc_guid, ndev->bus_name, &nfc_ops);
+ if (!cldev) {
+ dev_err(&dev->pdev->dev,
+ "Could not add the NFC device to the MEI bus\n");
+
+ goto err;
+ }
+
+ cldev->priv_data = ndev;
+
+
+ return;
+
+err:
+ mei_nfc_free(ndev);
+
+ return;
+}
+
+
+int mei_nfc_host_init(struct mei_device *dev)
+{
+ struct mei_nfc_dev *ndev = &nfc_dev;
+ struct mei_cl *cl_info, *cl = NULL;
+ int i, ret;
+
+ /* already initialzed */
+ if (ndev->cl_info)
+ return 0;
+
+ cl_info = mei_cl_allocate(dev);
+ cl = mei_cl_allocate(dev);
+
+ if (!cl || !cl_info) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ /* check for valid client id */
+ i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid);
+ if (i < 0) {
+ dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
+ ret = -ENOENT;
+ goto err;
+ }
+
+ cl_info->me_client_id = dev->me_clients[i].client_id;
+
+ ret = mei_cl_link(cl_info, MEI_HOST_CLIENT_ID_ANY);
+ if (ret)
+ goto err;
+
+ cl_info->device_uuid = mei_nfc_info_guid;
+
+ list_add_tail(&cl_info->device_link, &dev->device_list);
+
+ /* check for valid client id */
+ i = mei_me_cl_by_uuid(dev, &mei_nfc_guid);
+ if (i < 0) {
+ dev_info(&dev->pdev->dev, "nfc: failed to find the client\n");
+ ret = -ENOENT;
+ goto err;
+ }
+
+ cl->me_client_id = dev->me_clients[i].client_id;
+
+ ret = mei_cl_link(cl, MEI_HOST_CLIENT_ID_ANY);
+ if (ret)
+ goto err;
+
+ cl->device_uuid = mei_nfc_guid;
+
+ list_add_tail(&cl->device_link, &dev->device_list);
+
+ ndev->cl_info = cl_info;
+ ndev->cl = cl;
+ ndev->req_id = 1;
+
+ INIT_WORK(&ndev->init_work, mei_nfc_init);
+ init_waitqueue_head(&ndev->send_wq);
+ schedule_work(&ndev->init_work);
+
+ return 0;
+
+err:
+ mei_nfc_free(ndev);
+
+ return ret;
+}
+
+void mei_nfc_host_exit(void)
+{
+ struct mei_nfc_dev *ndev = &nfc_dev;
+
+ if (ndev->cl && ndev->cl->device)
+ mei_cl_remove_device(ndev->cl->device);
+
+ mei_nfc_free(ndev);
+}
diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c
index b8b5c9c3ad0..88aec6a90ff 100644
--- a/drivers/misc/mei/pci-me.c
+++ b/drivers/misc/mei/pci-me.c
@@ -47,7 +47,7 @@
static struct pci_dev *mei_pdev;
/* mei_pci_tbl - PCI Device ID Table */
-static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = {
+static DEFINE_PCI_DEVICE_TABLE(mei_me_pci_tbl) = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)},
@@ -86,7 +86,7 @@ static DEFINE_PCI_DEVICE_TABLE(mei_pci_tbl) = {
{0, }
};
-MODULE_DEVICE_TABLE(pci, mei_pci_tbl);
+MODULE_DEVICE_TABLE(pci, mei_me_pci_tbl);
static DEFINE_MUTEX(mei_mutex);
@@ -97,7 +97,7 @@ static DEFINE_MUTEX(mei_mutex);
*
* returns true if ME Interface is valid, false otherwise
*/
-static bool mei_quirk_probe(struct pci_dev *pdev,
+static bool mei_me_quirk_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
u32 reg;
@@ -119,7 +119,7 @@ static bool mei_quirk_probe(struct pci_dev *pdev,
*
* returns 0 on success, <0 on failure.
*/
-static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+static int mei_me_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct mei_device *dev;
struct mei_me_hw *hw;
@@ -127,7 +127,7 @@ static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
mutex_lock(&mei_mutex);
- if (!mei_quirk_probe(pdev, ent)) {
+ if (!mei_me_quirk_probe(pdev, ent)) {
err = -ENODEV;
goto end;
}
@@ -184,20 +184,19 @@ static int mei_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto disable_msi;
}
- if (mei_hw_init(dev)) {
+ if (mei_start(dev)) {
dev_err(&pdev->dev, "init hw failure.\n");
err = -ENODEV;
goto release_irq;
}
- err = mei_register(&pdev->dev);
+ err = mei_register(dev);
if (err)
goto release_irq;
mei_pdev = pdev;
pci_set_drvdata(pdev, dev);
-
schedule_delayed_work(&dev->timer_work, HZ);
mutex_unlock(&mei_mutex);
@@ -233,7 +232,7 @@ end:
* mei_remove is called by the PCI subsystem to alert the driver
* that it should release a PCI device.
*/
-static void mei_remove(struct pci_dev *pdev)
+static void mei_me_remove(struct pci_dev *pdev)
{
struct mei_device *dev;
struct mei_me_hw *hw;
@@ -253,8 +252,6 @@ static void mei_remove(struct pci_dev *pdev)
mei_pdev = NULL;
- mei_watchdog_unregister(dev);
-
/* disable interrupts */
mei_disable_interrupts(dev);
@@ -265,16 +262,17 @@ static void mei_remove(struct pci_dev *pdev)
if (hw->mem_addr)
pci_iounmap(pdev, hw->mem_addr);
+ mei_deregister(dev);
+
kfree(dev);
pci_release_regions(pdev);
pci_disable_device(pdev);
- mei_deregister();
}
#ifdef CONFIG_PM
-static int mei_pci_suspend(struct device *device)
+static int mei_me_pci_suspend(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct mei_device *dev = pci_get_drvdata(pdev);
@@ -294,7 +292,7 @@ static int mei_pci_suspend(struct device *device)
return 0;
}
-static int mei_pci_resume(struct device *device)
+static int mei_me_pci_resume(struct device *device)
{
struct pci_dev *pdev = to_pci_dev(device);
struct mei_device *dev;
@@ -334,24 +332,24 @@ static int mei_pci_resume(struct device *device)
return err;
}
-static SIMPLE_DEV_PM_OPS(mei_pm_ops, mei_pci_suspend, mei_pci_resume);
-#define MEI_PM_OPS (&mei_pm_ops)
+static SIMPLE_DEV_PM_OPS(mei_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume);
+#define MEI_ME_PM_OPS (&mei_me_pm_ops)
#else
-#define MEI_PM_OPS NULL
+#define MEI_ME_PM_OPS NULL
#endif /* CONFIG_PM */
/*
* PCI driver structure
*/
-static struct pci_driver mei_driver = {
+static struct pci_driver mei_me_driver = {
.name = KBUILD_MODNAME,
- .id_table = mei_pci_tbl,
- .probe = mei_probe,
- .remove = mei_remove,
- .shutdown = mei_remove,
- .driver.pm = MEI_PM_OPS,
+ .id_table = mei_me_pci_tbl,
+ .probe = mei_me_probe,
+ .remove = mei_me_remove,
+ .shutdown = mei_me_remove,
+ .driver.pm = MEI_ME_PM_OPS,
};
-module_pci_driver(mei_driver);
+module_pci_driver(mei_me_driver);
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION("Intel(R) Management Engine Interface");
diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c
index 2413247fc39..eb3f05c8d7d 100644
--- a/drivers/misc/mei/wd.c
+++ b/drivers/misc/mei/wd.c
@@ -317,7 +317,8 @@ end:
*
* returns 0 if success, negative errno code for failure
*/
-static int mei_wd_ops_set_timeout(struct watchdog_device *wd_dev, unsigned int timeout)
+static int mei_wd_ops_set_timeout(struct watchdog_device *wd_dev,
+ unsigned int timeout)
{
struct mei_device *dev;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 20:35:28 +0000