1 | /*
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2 | * Copyright (c) 2012 Petr Jerman
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | *
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9 | * - Redistributions of source code must retain the above copyright
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10 | * notice, this list of conditions and the following disclaimer.
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11 | * - Redistributions in binary form must reproduce the above copyright
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12 | * notice, this list of conditions and the following disclaimer in the
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13 | * documentation and/or other materials provided with the distribution.
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14 | * - The name of the author may not be used to endorse or promote products
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15 | * derived from this software without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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27 | */
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28 |
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29 | /** @addtogroup bd
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30 | * @{
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31 | */
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32 |
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33 | /**
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34 | * @file
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35 | * @brief SATA disk driver
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36 | *
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37 | */
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38 |
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39 | #include <sys/types.h>
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40 | #include <bd_srv.h>
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41 | #include <devman.h>
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42 | #include <errno.h>
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43 | #include <stdio.h>
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44 | #include <str.h>
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45 | #include <loc.h>
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46 | #include <macros.h>
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47 | #include <task.h>
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48 |
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49 | #include <ahci_iface.h>
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50 | #include "sata_bd.h"
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51 |
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52 | #define NAME "sata_bd"
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53 | #define NAMESPACE "bd"
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54 |
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55 | /** Maximum number of disks handled */
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56 | #define MAXDISKS 256
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57 |
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58 | static sata_bd_dev_t disk[MAXDISKS];
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59 | static int disk_count;
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60 |
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61 | static int sata_bd_open(bd_srvs_t *, bd_srv_t *);
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62 | static int sata_bd_close(bd_srv_t *);
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63 | static int sata_bd_read_blocks(bd_srv_t *, aoff64_t, size_t, void *, size_t);
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64 | static int sata_bd_write_blocks(bd_srv_t *, aoff64_t, size_t, const void *, size_t);
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65 | static int sata_bd_get_block_size(bd_srv_t *, size_t *);
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66 | static int sata_bd_get_num_blocks(bd_srv_t *, aoff64_t *);
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67 |
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68 | static bd_ops_t sata_bd_ops = {
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69 | .open = sata_bd_open,
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70 | .close = sata_bd_close,
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71 | .read_blocks = sata_bd_read_blocks,
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72 | .write_blocks = sata_bd_write_blocks,
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73 | .get_block_size = sata_bd_get_block_size,
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74 | .get_num_blocks = sata_bd_get_num_blocks
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75 | };
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76 |
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77 | static sata_bd_dev_t *bd_srv_sata(bd_srv_t *bd)
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78 | {
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79 | return (sata_bd_dev_t *) bd->srvs->sarg;
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80 | }
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81 |
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82 | /** Find SATA devices in device tree.
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83 | *
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84 | * @param Device manager handle describing container for searching.
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85 | *
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86 | * @return EOK if succeed, error code otherwise.
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87 | *
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88 | */
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89 | static int scan_device_tree(devman_handle_t funh)
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90 | {
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91 | devman_handle_t devh;
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92 | devman_handle_t *cfuns;
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93 | size_t count, i;
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94 | int rc;
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95 |
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96 | /* If device is SATA, add device to the disk array. */
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97 | disk[disk_count].sess = ahci_get_sess(funh, &disk[disk_count].dev_name);
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98 | if(disk[disk_count].sess != NULL) {
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99 |
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100 | ahci_get_sata_device_name(disk[disk_count].sess,
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101 | SATA_DEV_NAME_LENGTH, disk[disk_count].sata_dev_name);
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102 |
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103 | ahci_get_block_size(disk[disk_count].sess,
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104 | &disk[disk_count].block_size);
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105 |
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106 | ahci_get_num_blocks(disk[disk_count].sess, &disk[disk_count].blocks);
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107 |
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108 | bd_srvs_init(&disk[disk_count].bds);
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109 | disk[disk_count].bds.ops = &sata_bd_ops;
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110 | disk[disk_count].bds.sarg = &disk[disk_count];
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111 |
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112 | printf("Device %s - %s , blocks: %lu, block_size: %lu\n",
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113 | disk[disk_count].dev_name, disk[disk_count].sata_dev_name,
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114 | (long unsigned int) disk[disk_count].blocks,
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115 | (long unsigned int) disk[disk_count].block_size);
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116 |
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117 | ++disk_count;
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118 | }
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119 |
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120 | /* search children */
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121 | rc = devman_fun_get_child(funh, &devh);
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122 | if (rc == ENOENT)
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123 | return EOK;
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124 |
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125 | if (rc != EOK) {
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126 | printf(NAME ": Failed getting child device for function %s.\n", "xxx");
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127 | return rc;
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128 | }
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129 |
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130 | rc = devman_dev_get_functions(devh, &cfuns, &count);
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131 | if (rc != EOK) {
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132 | printf(NAME ": Failed getting list of functions for device %s.\n",
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133 | "xxx");
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134 | return rc;
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135 | }
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136 |
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137 | for (i = 0; i < count; i++)
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138 | scan_device_tree(cfuns[i]);
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139 |
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140 | free(cfuns);
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141 | return EOK;
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142 | }
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143 |
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144 | /** Find sata devices in device tree from root.
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145 | *
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146 | * @return EOK if succeed, error code otherwise.
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147 | *
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148 | */
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149 | static int get_sata_disks(void)
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150 | {
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151 | devman_handle_t root_fun;
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152 | int rc;
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153 |
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154 | disk_count = 0;
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155 |
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156 | rc = devman_fun_get_handle("/", &root_fun, 0);
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157 | if (rc != EOK) {
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158 | printf(NAME ": Error resolving root function.\n");
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159 | return EIO;
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160 | }
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161 |
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162 | scan_device_tree(root_fun);
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163 |
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164 | return EOK;
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165 | }
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166 |
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167 | /** Block device connection handler. */
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168 | static void sata_bd_connection(ipc_callid_t iid, ipc_call_t *icall, void *arg)
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169 | {
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170 | service_id_t dsid;
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171 | int disk_id, i;
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172 |
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173 | /* Get the device service ID. */
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174 | dsid = IPC_GET_ARG1(*icall);
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175 |
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176 | /* Determine which disk device is the client connecting to. */
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177 | disk_id = -1;
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178 | for (i = 0; i < MAXDISKS; i++)
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179 | if (disk[i].service_id == dsid)
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180 | disk_id = i;
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181 |
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182 | if (disk_id < 0) {
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183 | async_answer_0(iid, EINVAL);
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184 | return;
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185 | }
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186 |
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187 | bd_conn(iid, icall, &disk[disk_id].bds);
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188 | }
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189 |
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190 | /** Open device. */
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191 | static int sata_bd_open(bd_srvs_t *bds, bd_srv_t *bd)
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192 | {
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193 | return EOK;
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194 | }
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195 |
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196 | /** Close device. */
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197 | static int sata_bd_close(bd_srv_t *bd)
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198 | {
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199 | return EOK;
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200 | }
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201 |
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202 | /** Read blocks from partition. */
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203 | static int sata_bd_read_blocks(bd_srv_t *bd, aoff64_t ba, size_t cnt, void *buf,
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204 | size_t size)
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205 | {
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206 | sata_bd_dev_t *sbd = bd_srv_sata(bd);
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207 |
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208 | if (size < cnt * sbd->block_size)
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209 | return EINVAL;
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210 |
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211 | return ahci_read_blocks(sbd->sess, ba, cnt, buf);
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212 | }
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213 |
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214 | /** Write blocks to partition. */
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215 | static int sata_bd_write_blocks(bd_srv_t *bd, aoff64_t ba, size_t cnt,
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216 | const void *buf, size_t size)
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217 | {
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218 | sata_bd_dev_t *sbd = bd_srv_sata(bd);
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219 |
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220 | if (size < cnt * sbd->block_size)
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221 | return EINVAL;
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222 |
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223 | return ahci_write_blocks(sbd->sess, ba, cnt, (void *)buf);
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224 | }
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225 |
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226 | /** Get device block size. */
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227 | static int sata_bd_get_block_size(bd_srv_t *bd, size_t *rsize)
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228 | {
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229 | sata_bd_dev_t *sbd = bd_srv_sata(bd);
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230 |
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231 | *rsize = sbd->block_size;
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232 | return EOK;
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233 | }
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234 |
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235 | /** Get number of blocks on device. */
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236 | static int sata_bd_get_num_blocks(bd_srv_t *bd, aoff64_t *rnb)
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237 | {
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238 | sata_bd_dev_t *sbd = bd_srv_sata(bd);
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239 |
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240 | *rnb = sbd->blocks;
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241 | return EOK;
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242 | }
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243 |
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244 |
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245 | int main(int argc, char **argv)
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246 | {
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247 | int rc;
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248 |
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249 | async_set_client_connection(sata_bd_connection);
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250 | rc = loc_server_register(NAME);
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251 | if (rc < 0) {
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252 | printf(NAME ": Unable to register driver.\n");
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253 | return rc;
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254 | }
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255 |
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256 | rc = get_sata_disks();
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257 | if (rc != EOK) {
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258 | return rc;
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259 | }
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260 |
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261 | for(int i=0; i < disk_count; i++) {
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262 | char name[1024];
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263 | snprintf(name, 1024, "%s/%s", NAMESPACE, disk[i].dev_name);
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264 | rc = loc_service_register(name, &disk[i].service_id);
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265 | if (rc != EOK) {
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266 | printf(NAME ": Unable to register device %s.\n", name);
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267 | return rc;
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268 | }
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269 | }
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270 |
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271 | printf(NAME ": Accepting connections\n");
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272 | task_retval(0);
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273 | async_manager();
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274 |
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275 | /* Not reached */
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276 | return 0;
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277 | }
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278 |
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279 | /**
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280 | * @}
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281 | */
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