Nico Huber | 1f6bd94 | 2012-08-30 15:36:57 +0200 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2012 secunet Security Networks AG |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. The name of the author may not be used to endorse or promote products |
| 15 | * derived from this software without specific prior written permission. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 27 | * SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | #include <libpayload.h> |
| 31 | #ifdef CONFIG_STORAGE_AHCI |
| 32 | # include <storage/ahci.h> |
| 33 | #endif |
| 34 | #include <storage/storage.h> |
| 35 | |
| 36 | |
| 37 | static storage_dev_t **devices = NULL; |
| 38 | static size_t devices_length = 0; |
| 39 | static size_t dev_count = 0; |
| 40 | |
| 41 | int storage_attach_device(storage_dev_t *const dev) |
| 42 | { |
| 43 | if (dev_count == devices_length) { |
| 44 | const size_t new_len = |
| 45 | (0 == devices_length) ? 4 : devices_length << 1; |
| 46 | storage_dev_t **const new_devices = |
| 47 | realloc(devices, new_len * sizeof(storage_dev_t *)); |
| 48 | if (!new_devices) |
| 49 | return -1; |
| 50 | devices = new_devices; |
| 51 | memset(devices + devices_length, '\0', |
| 52 | (new_len - devices_length) * sizeof(storage_dev_t *)); |
| 53 | devices_length = new_len; |
| 54 | } |
| 55 | devices[dev_count++] = dev; |
| 56 | |
| 57 | return 0; |
| 58 | } |
| 59 | |
Patrick Georgi | 45b94bc | 2012-10-09 12:52:05 +0200 | [diff] [blame^] | 60 | int storage_device_count(void) |
| 61 | { |
| 62 | return dev_count; |
| 63 | } |
| 64 | |
Nico Huber | 1f6bd94 | 2012-08-30 15:36:57 +0200 | [diff] [blame] | 65 | /** |
| 66 | * Probe for drive with given number |
| 67 | * |
| 68 | * Looks for a drive with number dev_num and polls for a medium |
| 69 | * in the drive if appropriate. |
| 70 | * |
| 71 | * @dev_num device number counted from 0 |
| 72 | */ |
| 73 | storage_poll_t storage_probe(const size_t dev_num) |
| 74 | { |
| 75 | if (dev_num >= dev_count) |
| 76 | return POLL_NO_DEVICE; |
| 77 | else if (devices[dev_num]->poll) |
| 78 | return devices[dev_num]->poll(devices[dev_num]); |
| 79 | else |
| 80 | return POLL_MEDIUM_PRESENT; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Read 512-byte blocks |
| 85 | * |
| 86 | * Reads count blocks of 512 bytes from block start of drive dev_num |
| 87 | * into buf. |
| 88 | * |
| 89 | * @dev_num device number counted from 0 |
| 90 | * @start number of first block to read from |
| 91 | * @count number of blocks to read |
| 92 | * @buf buffer where the read data should be written |
| 93 | */ |
| 94 | ssize_t storage_read_blocks512(const size_t dev_num, |
| 95 | const lba_t start, const size_t count, |
| 96 | unsigned char *const buf) |
| 97 | { |
| 98 | if ((dev_num < dev_count) && devices[dev_num]->read_blocks512) |
| 99 | return devices[dev_num]->read_blocks512( |
| 100 | devices[dev_num], start, count, buf); |
| 101 | else |
| 102 | return -1; |
| 103 | } |
| 104 | |
| 105 | /** |
| 106 | * Initializes storage controllers |
| 107 | * |
| 108 | * This function should be called once at startup to bring up supported |
| 109 | * strorage controllers. |
| 110 | */ |
| 111 | void storage_initialize(void) |
| 112 | { |
| 113 | #ifdef CONFIG_STORAGE_AHCI |
| 114 | ahci_initialize(); |
| 115 | #endif |
| 116 | } |