| Edward O'Callaghan | efc5841 | 2014-01-23 08:30:42 +1100 | [diff] [blame] | 1 | /* |
| 2 | * This file is part of the libpayload project. |
| 3 | * |
| 4 | * Copyright (C) 2012 secunet Security Networks AG |
| 5 | * Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <stdlib.h> |
| 32 | #include <stdint.h> |
| 33 | #include <string.h> |
| 34 | #include <libpayload.h> |
| 35 | #include <pci.h> |
| 36 | #include <storage/ata.h> |
| 37 | #include <storage/ahci.h> |
| 38 | |
| 39 | |
| 40 | #include "ahci_private.h" |
| 41 | |
| 42 | |
| 43 | ssize_t ahci_packet_read_cmd(atapi_dev_t *const _dev, |
| 44 | const u8 *const cmd, const size_t cmdlen, |
| 45 | u8 *const buf, const size_t buflen) |
| 46 | { |
| 47 | ahci_dev_t *const dev = (ahci_dev_t *)_dev; |
| 48 | |
| 49 | if ((cmdlen != 12) && (cmdlen != 16)) { |
| 50 | printf("ahci: Only 12- and 16-byte packet commands allowed.\n"); |
| 51 | return -1; |
| 52 | } |
| 53 | |
| 54 | const size_t len = ahci_cmdslot_prepare(dev, buf, buflen, 0); |
| 55 | u16 byte_limit = MIN(len, 63 * 1024); /* like Linux */ |
| 56 | if (byte_limit & 1) ++byte_limit; /* even limit */ |
| 57 | |
| 58 | dev->cmdlist[0].cmd |= CMD_ATAPI; |
| 59 | dev->cmdtable->fis[0] = FIS_HOST_TO_DEVICE; |
| 60 | dev->cmdtable->fis[1] = FIS_H2D_CMD; |
| 61 | dev->cmdtable->fis[2] = ATA_PACKET; |
| 62 | dev->cmdtable->fis[5] = byte_limit & 0xff; |
| 63 | dev->cmdtable->fis[6] = byte_limit >> 8; |
| 64 | memcpy((void *)dev->cmdtable->atapi_cmd, cmd, cmdlen); |
| 65 | |
| 66 | return ahci_cmdslot_exec(dev); |
| 67 | } |