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Diffstat (limited to 'drivers/misc/mei/mei_dev.h')
-rw-r--r--drivers/misc/mei/mei_dev.h428
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
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index 000000000000..63d7ee97c5fb
--- /dev/null
+++ b/drivers/misc/mei/mei_dev.h
@@ -0,0 +1,428 @@
+/*
+ *
+ * Intel Management Engine Interface (Intel MEI) Linux driver
+ * Copyright (c) 2003-2012, 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.
+ *
+ */
+
+#ifndef _MEI_DEV_H_
+#define _MEI_DEV_H_
+
+#include <linux/types.h>
+#include <linux/watchdog.h>
+#include <linux/mei.h>
+#include "hw.h"
+
+/*
+ * watch dog definition
+ */
+#define MEI_WATCHDOG_DATA_SIZE 16
+#define MEI_START_WD_DATA_SIZE 20
+#define MEI_WD_PARAMS_SIZE 4
+#define MEI_WD_STATE_INDEPENDENCE_MSG_SENT (1 << 0)
+
+#define MEI_RD_MSG_BUF_SIZE (128 * sizeof(u32))
+
+/*
+ * MEI PCI Device object
+ */
+extern struct pci_dev *mei_device;
+
+
+/*
+ * AMTHI Client UUID
+ */
+extern const uuid_le mei_amthi_guid;
+
+/*
+ * Watchdog Client UUID
+ */
+extern const uuid_le mei_wd_guid;
+
+/*
+ * Watchdog independence state message
+ */
+extern const u8 mei_wd_state_independence_msg[3][4];
+
+/*
+ * Number of File descriptors/handles
+ * that can be opened to the driver.
+ *
+ * Limit to 253: 255 Total Clients
+ * minus internal client for AMTHI
+ * minus internal client for Watchdog
+ */
+#define MEI_MAX_OPEN_HANDLE_COUNT 253
+
+/*
+ * Number of Maximum MEI Clients
+ */
+#define MEI_CLIENTS_MAX 255
+
+/* File state */
+enum file_state {
+ MEI_FILE_INITIALIZING = 0,
+ MEI_FILE_CONNECTING,
+ MEI_FILE_CONNECTED,
+ MEI_FILE_DISCONNECTING,
+ MEI_FILE_DISCONNECTED
+};
+
+/* MEI device states */
+enum mei_states {
+ MEI_INITIALIZING = 0,
+ MEI_INIT_CLIENTS,
+ MEI_ENABLED,
+ MEI_RESETING,
+ MEI_DISABLED,
+ MEI_RECOVERING_FROM_RESET,
+ MEI_POWER_DOWN,
+ MEI_POWER_UP
+};
+
+/* 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,
+ MEI_IAMTHIF_FLOW_CONTROL,
+ MEI_IAMTHIF_READING,
+ MEI_IAMTHIF_READ_COMPLETE
+};
+
+enum mei_file_transaction_states {
+ MEI_IDLE,
+ MEI_WRITING,
+ MEI_WRITE_COMPLETE,
+ MEI_FLOW_CONTROL,
+ MEI_READING,
+ MEI_READ_COMPLETE
+};
+
+/* MEI CB */
+enum mei_cb_major_types {
+ MEI_READ = 0,
+ MEI_WRITE,
+ MEI_IOCTL,
+ MEI_OPEN,
+ MEI_CLOSE
+};
+
+/*
+ * Intel MEI message data struct
+ */
+struct mei_message_data {
+ u32 size;
+ unsigned char *data;
+} __packed;
+
+
+struct mei_cl_cb {
+ struct list_head cb_list;
+ enum mei_cb_major_types major_file_operations;
+ void *file_private;
+ struct mei_message_data request_buffer;
+ struct mei_message_data response_buffer;
+ unsigned long information;
+ unsigned long read_time;
+ struct file *file_object;
+};
+
+/* MEI client instance carried as file->pirvate_data*/
+struct mei_cl {
+ struct list_head link;
+ struct mei_device *dev;
+ enum file_state state;
+ wait_queue_head_t tx_wait;
+ wait_queue_head_t rx_wait;
+ wait_queue_head_t wait;
+ int read_pending;
+ int status;
+ /* ID of client connected */
+ u8 host_client_id;
+ u8 me_client_id;
+ u8 mei_flow_ctrl_creds;
+ u8 timer_count;
+ enum mei_file_transaction_states reading_state;
+ enum mei_file_transaction_states writing_state;
+ int sm_state;
+ struct mei_cl_cb *read_cb;
+};
+
+struct mei_io_list {
+ struct mei_cl_cb mei_cb;
+};
+
+/* MEI private device struct */
+struct mei_device {
+ struct pci_dev *pdev; /* pointer to pci device struct */
+ /*
+ * lists of queues
+ */
+ /* array of pointers to aio lists */
+ struct mei_io_list read_list; /* driver read queue */
+ struct mei_io_list write_list; /* driver write queue */
+ struct mei_io_list write_waiting_list; /* write waiting queue */
+ struct mei_io_list ctrl_wr_list; /* managed write IOCTL list */
+ struct mei_io_list ctrl_rd_list; /* managed read IOCTL list */
+ struct mei_io_list amthi_cmd_list; /* amthi list for cmd waiting */
+
+ /* driver managed amthi list for reading completed amthi cmd data */
+ struct mei_io_list amthi_read_complete_list;
+ /*
+ * list of files
+ */
+ struct list_head file_list;
+ long open_handle_count;
+ /*
+ * memory of device
+ */
+ unsigned int mem_base;
+ unsigned int mem_length;
+ void __iomem *mem_addr;
+ /*
+ * lock for the device
+ */
+ struct mutex device_lock; /* device lock */
+ struct delayed_work timer_work; /* MEI timer delayed work (timeouts) */
+ bool recvd_msg;
+ /*
+ * hw states of host and fw(ME)
+ */
+ u32 host_hw_state;
+ u32 me_hw_state;
+ /*
+ * waiting queue for receive message from FW
+ */
+ wait_queue_head_t wait_recvd_msg;
+ wait_queue_head_t wait_stop_wd;
+
+ /*
+ * mei device states
+ */
+ enum mei_states mei_state;
+ enum mei_init_clients_states init_clients_state;
+ u16 init_clients_timer;
+ bool stop;
+ bool need_reset;
+
+ u32 extra_write_index;
+ unsigned char rd_msg_buf[MEI_RD_MSG_BUF_SIZE]; /* control messages */
+ u32 wr_msg_buf[128]; /* used for control messages */
+ u32 ext_msg_buf[8]; /* for control responses */
+ u32 rd_msg_hdr;
+
+ struct hbm_version version;
+
+ struct mei_me_client *me_clients; /* Note: memory has to be allocated */
+ DECLARE_BITMAP(me_clients_map, MEI_CLIENTS_MAX);
+ DECLARE_BITMAP(host_clients_map, MEI_CLIENTS_MAX);
+ u8 me_clients_num;
+ u8 me_client_presentation_num;
+ u8 me_client_index;
+ bool mei_host_buffer_is_empty;
+
+ struct mei_cl wd_cl;
+ bool wd_pending;
+ bool wd_stopped;
+ bool wd_bypass; /* if false, don't refresh watchdog ME client */
+ u16 wd_timeout; /* seconds ((wd_data[1] << 8) + wd_data[0]) */
+ u16 wd_due_counter;
+ unsigned char wd_data[MEI_START_WD_DATA_SIZE];
+
+
+
+ struct file *iamthif_file_object;
+ struct mei_cl iamthif_cl;
+ struct mei_cl_cb *iamthif_current_cb;
+ int iamthif_mtu;
+ unsigned long iamthif_timer;
+ u32 iamthif_stall_timer;
+ unsigned char *iamthif_msg_buf; /* Note: memory has to be allocated */
+ u32 iamthif_msg_buf_size;
+ u32 iamthif_msg_buf_index;
+ enum iamthif_states iamthif_state;
+ bool iamthif_flow_control_pending;
+ bool iamthif_ioctl;
+ bool iamthif_canceled;
+
+ bool wd_interface_reg;
+};
+
+
+/*
+ * mei init function prototypes
+ */
+struct mei_device *mei_device_init(struct pci_dev *pdev);
+void mei_reset(struct mei_device *dev, int interrupts);
+int mei_hw_init(struct mei_device *dev);
+int mei_task_initialize_clients(void *data);
+int mei_initialize_clients(struct mei_device *dev);
+int mei_disconnect_host_client(struct mei_device *dev, struct mei_cl *cl);
+void mei_remove_client_from_file_list(struct mei_device *dev, u8 host_client_id);
+void mei_host_init_iamthif(struct mei_device *dev);
+void mei_allocate_me_clients_storage(struct mei_device *dev);
+
+
+u8 mei_find_me_client_update_filext(struct mei_device *dev,
+ struct mei_cl *priv,
+ const uuid_le *cguid, u8 client_id);
+
+/*
+ * MEI IO List Functions
+ */
+void mei_io_list_init(struct mei_io_list *list);
+void mei_io_list_flush(struct mei_io_list *list, struct mei_cl *cl);
+
+/*
+ * MEI ME Client Functions
+ */
+
+struct mei_cl *mei_cl_allocate(struct mei_device *dev);
+void mei_cl_init(struct mei_cl *cl, struct mei_device *dev);
+int mei_cl_flush_queues(struct mei_cl *cl);
+/**
+ * mei_cl_cmp_id - tells if file private data have same id
+ *
+ * @fe1: private data of 1. file object
+ * @fe2: private data of 2. file object
+ *
+ * returns true - if ids are the same and not NULL
+ */
+static inline bool mei_cl_cmp_id(const struct mei_cl *cl1,
+ const struct mei_cl *cl2)
+{
+ return cl1 && cl2 &&
+ (cl1->host_client_id == cl2->host_client_id) &&
+ (cl1->me_client_id == cl2->me_client_id);
+}
+
+
+
+/*
+ * MEI Host Client Functions
+ */
+void mei_host_start_message(struct mei_device *dev);
+void mei_host_enum_clients_message(struct mei_device *dev);
+int mei_host_client_properties(struct mei_device *dev);
+
+/*
+ * MEI interrupt functions prototype
+ */
+irqreturn_t mei_interrupt_quick_handler(int irq, void *dev_id);
+irqreturn_t mei_interrupt_thread_handler(int irq, void *dev_id);
+void mei_timer(struct work_struct *work);
+
+/*
+ * MEI input output function prototype
+ */
+int mei_ioctl_connect_client(struct file *file,
+ struct mei_connect_client_data *data);
+
+int mei_start_read(struct mei_device *dev, struct mei_cl *cl);
+
+int amthi_write(struct mei_device *dev, struct mei_cl_cb *priv_cb);
+
+int amthi_read(struct mei_device *dev, struct file *file,
+ char __user *ubuf, size_t length, loff_t *offset);
+
+struct mei_cl_cb *find_amthi_read_list_entry(struct mei_device *dev,
+ struct file *file);
+
+void mei_run_next_iamthif_cmd(struct mei_device *dev);
+
+void mei_free_cb_private(struct mei_cl_cb *priv_cb);
+
+int mei_find_me_client_index(const struct mei_device *dev, uuid_le cuuid);
+
+/*
+ * Register Access Function
+ */
+
+/**
+ * mei_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(struct mei_device *dev, unsigned long offset)
+{
+ return ioread32(dev->mem_addr + offset);
+}
+
+/**
+ * mei_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(struct mei_device *dev,
+ unsigned long offset, u32 value)
+{
+ iowrite32(value, dev->mem_addr + offset);
+}
+
+/**
+ * mei_hcsr_read - Reads 32bit data from the host CSR
+ *
+ * @dev: the device structure
+ *
+ * returns the byte read.
+ */
+static inline u32 mei_hcsr_read(struct mei_device *dev)
+{
+ return mei_reg_read(dev, H_CSR);
+}
+
+/**
+ * mei_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(struct mei_device *dev)
+{
+ return mei_reg_read(dev, ME_CSR_HA);
+}
+
+/**
+ * get_me_cb_rw - Reads 32bit data from the mei ME_CB_RW register
+ *
+ * @dev: the device structure
+ *
+ * returns ME_CB_RW register value (u32)
+ */
+static inline u32 mei_mecbrw_read(struct mei_device *dev)
+{
+ return mei_reg_read(dev, ME_CB_RW);
+}
+
+
+/*
+ * mei interface function prototypes
+ */
+void mei_hcsr_set(struct mei_device *dev);
+void mei_csr_clear_his(struct mei_device *dev);
+
+void mei_enable_interrupts(struct mei_device *dev);
+void mei_disable_interrupts(struct mei_device *dev);
+
+#endif