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 io_bus;
  36         unsigned long io_end_bus;
  37         unsigned long io_memory_size;
  38         void __iomem *io_addr;
  39
  40         /* restricted access region */
  41         dma_addr_t rar_bus;
  42         void *rar_addr;
  43
  44         /* shared memory region */
  45         dma_addr_t shared_bus;
  46         void *shared_addr;
  47
  48         /* firmware regions */
  49         dma_addr_t cache_bus;
  50         unsigned long cache_size;
  51         void *cache_addr;
  52
  53         dma_addr_t resident_bus;
  54         unsigned long resident_size;
  55         void *resident_addr;
  56
  57         unsigned long rar_region_addr;
  58
  59         /* start address of the access to the SEP registers from driver */
  60         void __iomem *reg_addr;
  61         /* transaction counter that coordinates the transactions between SEP and HOST */
  62         unsigned long send_ct;
  63         /* counter for the messages from sep */
  64         unsigned long reply_ct;
  65         /* counter for the number of bytes allocated in the pool for the current
  66            transaction */
  67         unsigned long data_pool_bytes_allocated;
  68
  69         /* array of pointers to the pages that represent input data for the synchronic
  70            DMA action */
  71         struct page **in_page_array;
  72
  73         /* array of pointers to the pages that represent out data for the synchronic
  74            DMA action */
  75         struct page **out_page_array;
  76
  77         /* number of pages in the sep_in_page_array */
  78         unsigned long in_num_pages;
  79
  80         /* number of pages in the sep_out_page_array */
  81         unsigned long out_num_pages;
  82
  83         /* global data for every flow */
  84         struct sep_flow_context_t flows[SEP_DRIVER_NUM_FLOWS];
  85
  86         /* pointer to the workqueue that handles the flow done interrupts */
  87         struct workqueue_struct *flow_wq;
  88
  89         /* address of the shared memory allocated during init for SEP driver */
  90         void *shared_area;
  91         /* the physical address of the shared area */
  92         dma_addr_t shared_area_bus;
  93
  94         /* Message Shared Area start address - will be allocated during init */
  95         void *message_shared_area_addr;
  96 };
  97
  98 static struct sep_device *sep_dev;
  99
 100 static inline void sep_write_reg(struct sep_device *dev, int reg, u32 value)
 101 {
 102         void __iomem *addr = dev->reg_addr + reg;
 103         writel(value, addr);
 104 }
 105
 106 static inline u32 sep_read_reg(struct sep_device *dev, int reg)
 107 {
 108         void __iomem *addr = dev->reg_addr + reg;
 109         return readl(addr);
 110 }
 111
 112 /* wait for SRAM write complete(indirect write */
 113 static inline void sep_wait_sram_write(struct sep_device *dev)
 114 {
 115         u32 reg_val;
 116         do
 117                 reg_val = sep_read_reg(dev, HW_SRAM_DATA_READY_REG_ADDR);
 118         while (!(reg_val & 1));
 119 }
 120
 121
 122 #endif