6 * sep_dev.h - Security Processor Device Structures
8 * Copyright(c) 2009-2011 Intel Corporation. All rights reserved.
9 * Contributions(c) 2009-2011 Discretix. All rights reserved.
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the Free
13 * Software Foundation; version 2 of the License.
15 * This program is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
20 * You should have received a copy of the GNU General Public License along with
21 * this program; if not, write to the Free Software Foundation, Inc., 59
22 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 * 2010.09.14 upgrade to Medfield
31 * 2011.02.22 enable kernel crypto
35 /* pointer to pci dev */
38 /* character device file */
41 /* devices (using misc dev) */
42 struct miscdevice miscdev_sep;
44 /* major / minor numbers of device */
46 /* guards command sent counter */
47 spinlock_t snd_rply_lck;
48 /* guards driver memory usage in fastcall if */
49 struct semaphore sep_doublebuf;
51 /* flags to indicate use and lock status of sep */
52 u32 pid_doing_transaction;
53 unsigned long in_use_flags;
55 /* address of the shared memory allocated during init for SEP driver
57 dma_addr_t shared_bus;
61 /* start address of the access to the SEP registers from driver */
62 dma_addr_t reg_physical_addr;
63 dma_addr_t reg_physical_end;
64 void __iomem *reg_addr;
66 /* wait queue heads of the driver */
67 wait_queue_head_t event_interrupt;
68 wait_queue_head_t event_transactions;
70 struct list_head sep_queue_status;
72 spinlock_t sep_queue_lock;
77 /* indicates whether power save is set up */
83 /* transaction counter that coordinates the
84 transactions between SEP and HOST */
85 unsigned long send_ct;
86 /* counter for the messages from sep */
87 unsigned long reply_ct;
89 /* The following are used for kernel crypto client requests */
90 u32 in_kernel; /* Set for kernel client request */
91 struct tasklet_struct finish_tasklet;
92 enum type_of_request current_request;
93 enum hash_stage current_hash_stage;
94 struct ahash_request *current_hash_req;
95 struct ablkcipher_request *current_cypher_req;
96 struct this_task_ctx *ta_ctx;
97 struct workqueue_struct *workqueue;
100 extern struct sep_device *sep_dev;
103 * SEP message header for a transaction
104 * @reserved: reserved memory (two words)
105 * @token: SEP message token
106 * @msg_len: message length
107 * @opcpde: message opcode
109 struct sep_msgarea_hdr {
117 * sep_queue_data - data to be maintained in status queue for a transaction
118 * @opcode : transaction opcode
119 * @size : message size
120 * @pid: owner process
121 * @name: owner process name
123 struct sep_queue_data {
127 u8 name[TASK_COMM_LEN];
130 /** sep_queue_info - maintains status info of all transactions
131 * @list: head of list
132 * @sep_queue_data : data for transaction
134 struct sep_queue_info {
135 struct list_head list;
136 struct sep_queue_data data;
139 static inline void sep_write_reg(struct sep_device *dev, int reg, u32 value)
141 void __iomem *addr = dev->reg_addr + reg;
145 static inline u32 sep_read_reg(struct sep_device *dev, int reg)
147 void __iomem *addr = dev->reg_addr + reg;
151 /* wait for SRAM write complete(indirect write */
152 static inline void sep_wait_sram_write(struct sep_device *dev)
157 reg_val = sep_read_reg(dev, HW_SRAM_DATA_READY_REG_ADDR);
158 } while (!(reg_val & 1));