drivers/staging/sep/sep_dev.h

   1 #ifndef __SEP_DEV_H__
   2 #define __SEP_DEV_H__
   3
   4 /*
   5  *
   6  *  sep_dev.h - Security Processor Device Structures
   7  *
   8  *  Copyright(c) 2009 Intel Corporation. All rights reserved.
   9  *  Copyright(c) 2009 Discretix. All rights reserved.
  10  *
  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; either version 2 of the License, or (at your option)
  14  *  any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  *  more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along with
  22  *  this program; if not, write to the Free Software Foundation, Inc., 59
  23  *  Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  24  *
  25  *  CONTACTS:
  26  *
  27  *  Alan Cox            alan@linux.intel.com
  28  *
  29  */
  30
  31 struct sep_device {
  32         /* pointer to pci dev */
  33         struct pci_dev *pdev;
  34
  35         unsigned long in_use;
  36
  37         /* address of the shared memory allocated during init for SEP driver
  38            (coherent alloc) */
  39         void *shared_addr;
  40         /* the physical address of the shared area */
  41         dma_addr_t shared_bus;
  42
  43         /* restricted access region (coherent alloc) */
  44         dma_addr_t rar_bus;
  45         void *rar_addr;
  46         /* firmware regions: cache is at rar_addr */
  47         unsigned long cache_size;
  48
  49         /* follows the cache */
  50         dma_addr_t resident_bus;
  51         unsigned long resident_size;
  52         void *resident_addr;
  53
  54         /* start address of the access to the SEP registers from driver */
  55         void __iomem *reg_addr;
  56         /* transaction counter that coordinates the transactions between SEP and HOST */
  57         unsigned long send_ct;
  58         /* counter for the messages from sep */
  59         unsigned long reply_ct;
  60         /* counter for the number of bytes allocated in the pool for the current
  61            transaction */
  62         unsigned long data_pool_bytes_allocated;
  63
  64         /* array of pointers to the pages that represent input data for the synchronic
  65            DMA action */
  66         struct page **in_page_array;
  67
  68         /* array of pointers to the pages that represent out data for the synchronic
  69            DMA action */
  70         struct page **out_page_array;
  71
  72         /* number of pages in the sep_in_page_array */
  73         unsigned long in_num_pages;
  74
  75         /* number of pages in the sep_out_page_array */
  76         unsigned long out_num_pages;
  77
  78         /* global data for every flow */
  79         struct sep_flow_context_t flows[SEP_DRIVER_NUM_FLOWS];
  80
  81         /* pointer to the workqueue that handles the flow done interrupts */
  82         struct workqueue_struct *flow_wq;
  83
  84 };
  85
  86 static struct sep_device *sep_dev;
  87
  88 static inline void sep_write_reg(struct sep_device *dev, int reg, u32 value)
  89 {
  90         void __iomem *addr = dev->reg_addr + reg;
  91         writel(value, addr);
  92 }
  93
  94 static inline u32 sep_read_reg(struct sep_device *dev, int reg)
  95 {
  96         void __iomem *addr = dev->reg_addr + reg;
  97         return readl(addr);
  98 }
  99
 100 /* wait for SRAM write complete(indirect write */
 101 static inline void sep_wait_sram_write(struct sep_device *dev)
 102 {
 103         u32 reg_val;
 104         do
 105                 reg_val = sep_read_reg(dev, HW_SRAM_DATA_READY_REG_ADDR);
 106         while (!(reg_val & 1));
 107 }
 108
 109
 110 #endif