resources/scsi_request.h

   1 #include "arch/low/general.h"
   2
   3 #include "libs/buffer.h"
   4 #include "libs/pointer.h"
   5
   6 namespace resources {
   7         class scsi_request /* : public block_io_request */ {
   8         private:
   9                 struct command_6 {
  10                         u8 operation;
  11                         u8 flags;
  12                         u16 lba;
  13                         u8 transfer_length;
  14                         u8 control;
  15                 } __attribute__((packed));
  16
  17                 struct command_10 {
  18                         u8 operation;
  19                         u8 flags;
  20                         u32 lba;
  21                         u8 reserved;
  22                         u16 transfer_length;
  23                         u8 control;
  24                 } __attribute__((packed));
  25
  26                 struct command_12 {
  27                         u8 operation;
  28                         u8 flags;
  29                         u32 lba;
  30                         u32 transfer_length;
  31                         u8 reserved;
  32                         u8 control;
  33                 } __attribute__((packed));
  34
  35                 p<command_10> cmd;
  36         public:
  37                 scsi_request() : cmd(new command_10) { }
  38                 ~scsi_request() {
  39                         cmd.dispose();
  40                 }
  41
  42                 void set_address(int addr) {
  43                         cmd->lba = addr;
  44                 }
  45
  46                 void set_size(int size) {
  47                         cmd->transfer_length = size;
  48                 }
  49
  50                 void read() {
  51                         cmd->control = 0;
  52                         cmd->reserved = 0;
  53                         cmd->flags = 0;
  54
  55                         cmd->operation = 0x28;
  56                 }
  57
  58                 buffer generate() const {
  59                         return buffer::to_mem(cmd);
  60                 }
  61         };
  62 }