/* * This file is part of the libpayload project. * * Copyright (C) 2012 secunet Security Networks AG * Copyright (C) 2013 Edward O'Callaghan <eocallaghan@alterapraxis.com> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <stdlib.h> #include <stdint.h> #include <string.h> #include <libpayload.h> #include <pci.h> #include <storage/ata.h> #include <storage/ahci.h> #include "ahci_private.h" ssize_t ahci_ata_read_sectors(ata_dev_t *const ata_dev, const lba_t start, size_t count, u8 *const buf) { ahci_dev_t *const dev = (ahci_dev_t *)ata_dev; if (count == 0) return 0; if (ata_dev->read_cmd == ATA_READ_DMA) { if (start >= (1 << 28)) { printf("ahci: Sector is not 28-bit addressable.\n"); return -1; } else if (count > 256) { printf("ahci: Sector count too high (max. 256).\n"); count = 256; } #ifdef CONFIG_LP_STORAGE_64BIT_LBA } else if (ata_dev->read_cmd == ATA_READ_DMA_EXT) { if (start >= (1ULL << 48)) { printf("ahci: Sector is not 48-bit addressable.\n"); return -1; } else if (count > (64 * 1024)) { printf("ahci: Sector count too high (max. 65536).\n"); count = 64 * 1024; } #endif } else { printf("ahci: Unsupported ATA read command (0x%x).\n", ata_dev->read_cmd); return -1; } const size_t bytes = count << ata_dev->sector_size_shift; const size_t bytes_feasible = ahci_cmdslot_prepare(dev, buf, bytes, 0); const size_t sectors = bytes_feasible >> ata_dev->sector_size_shift; dev->cmdtable->fis[ 0] = FIS_HOST_TO_DEVICE; dev->cmdtable->fis[ 1] = FIS_H2D_CMD; dev->cmdtable->fis[ 2] = ata_dev->read_cmd; dev->cmdtable->fis[ 4] = (start >> 0) & 0xff; dev->cmdtable->fis[ 5] = (start >> 8) & 0xff; dev->cmdtable->fis[ 6] = (start >> 16) & 0xff; dev->cmdtable->fis[ 7] = FIS_H2D_DEV_LBA; dev->cmdtable->fis[ 8] = (start >> 24) & 0xff; #ifdef CONFIG_LP_STORAGE_64BIT_LBA if (ata_dev->read_cmd == ATA_READ_DMA_EXT) { dev->cmdtable->fis[ 9] = (start >> 32) & 0xff; dev->cmdtable->fis[10] = (start >> 40) & 0xff; } #endif dev->cmdtable->fis[12] = (sectors >> 0) & 0xff; dev->cmdtable->fis[13] = (sectors >> 8) & 0xff; if (ahci_cmdslot_exec(dev) < 0) return -1; else return dev->cmdlist->prd_bytes >> ata_dev->sector_size_shift; }