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/*
*
* 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;
}
#if 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;
#if 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;
}
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