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![Paul Gortmaker](/assets/img/avatar_default.png)
The module.h header was implicitly present everywhere, so files with no explicit include of the module infrastructure would build anyway. We are now removing the implicit include, and so we need to call out the module.h file that we need explicitly. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
460 lines
11 KiB
C
460 lines
11 KiB
C
/*
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* PS3 BD/DVD/CD-ROM Storage Driver
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*
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* Copyright (C) 2007 Sony Computer Entertainment Inc.
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* Copyright 2007 Sony Corp.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published
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* by the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/cdrom.h>
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#include <linux/highmem.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_dbg.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_eh.h>
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#include <asm/lv1call.h>
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#include <asm/ps3stor.h>
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#define DEVICE_NAME "ps3rom"
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#define BOUNCE_SIZE (64*1024)
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#define PS3ROM_MAX_SECTORS (BOUNCE_SIZE >> 9)
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struct ps3rom_private {
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struct ps3_storage_device *dev;
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struct scsi_cmnd *curr_cmd;
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};
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#define LV1_STORAGE_SEND_ATAPI_COMMAND (1)
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struct lv1_atapi_cmnd_block {
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u8 pkt[32]; /* packet command block */
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u32 pktlen; /* should be 12 for ATAPI 8020 */
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u32 blocks;
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u32 block_size;
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u32 proto; /* transfer mode */
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u32 in_out; /* transfer direction */
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u64 buffer; /* parameter except command block */
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u32 arglen; /* length above */
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};
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enum lv1_atapi_proto {
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NON_DATA_PROTO = 0,
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PIO_DATA_IN_PROTO = 1,
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PIO_DATA_OUT_PROTO = 2,
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DMA_PROTO = 3
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};
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enum lv1_atapi_in_out {
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DIR_WRITE = 0, /* memory -> device */
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DIR_READ = 1 /* device -> memory */
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};
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static int ps3rom_slave_configure(struct scsi_device *scsi_dev)
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{
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struct ps3rom_private *priv = shost_priv(scsi_dev->host);
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struct ps3_storage_device *dev = priv->dev;
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dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__,
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__LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel);
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/*
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* ATAPI SFF8020 devices use MODE_SENSE_10,
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* so we can prohibit MODE_SENSE_6
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*/
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scsi_dev->use_10_for_ms = 1;
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/* we don't support {READ,WRITE}_6 */
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scsi_dev->use_10_for_rw = 1;
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return 0;
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}
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static int ps3rom_atapi_request(struct ps3_storage_device *dev,
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struct scsi_cmnd *cmd)
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{
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struct lv1_atapi_cmnd_block atapi_cmnd;
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unsigned char opcode = cmd->cmnd[0];
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int res;
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u64 lpar;
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dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__,
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__LINE__, opcode);
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memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block));
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memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12);
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atapi_cmnd.pktlen = 12;
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atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */
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atapi_cmnd.blocks = atapi_cmnd.arglen = scsi_bufflen(cmd);
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atapi_cmnd.buffer = dev->bounce_lpar;
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switch (cmd->sc_data_direction) {
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case DMA_FROM_DEVICE:
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if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
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atapi_cmnd.proto = DMA_PROTO;
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else
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atapi_cmnd.proto = PIO_DATA_IN_PROTO;
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atapi_cmnd.in_out = DIR_READ;
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break;
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case DMA_TO_DEVICE:
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if (scsi_bufflen(cmd) >= CD_FRAMESIZE)
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atapi_cmnd.proto = DMA_PROTO;
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else
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atapi_cmnd.proto = PIO_DATA_OUT_PROTO;
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atapi_cmnd.in_out = DIR_WRITE;
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scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
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break;
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default:
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atapi_cmnd.proto = NON_DATA_PROTO;
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break;
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}
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lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd));
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res = lv1_storage_send_device_command(dev->sbd.dev_id,
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LV1_STORAGE_SEND_ATAPI_COMMAND,
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lpar, sizeof(atapi_cmnd),
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atapi_cmnd.buffer,
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atapi_cmnd.arglen, &dev->tag);
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if (res == LV1_DENIED_BY_POLICY) {
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dev_dbg(&dev->sbd.core,
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"%s:%u: ATAPI command 0x%02x denied by policy\n",
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__func__, __LINE__, opcode);
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return DID_ERROR << 16;
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}
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if (res) {
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dev_err(&dev->sbd.core,
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"%s:%u: ATAPI command 0x%02x failed %d\n", __func__,
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__LINE__, opcode, res);
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return DID_ERROR << 16;
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}
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return 0;
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}
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static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd)
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{
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return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 |
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cmd->cmnd[5];
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}
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static inline unsigned int srb10_len(const struct scsi_cmnd *cmd)
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{
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return cmd->cmnd[7] << 8 | cmd->cmnd[8];
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}
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static int ps3rom_read_request(struct ps3_storage_device *dev,
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struct scsi_cmnd *cmd, u32 start_sector,
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u32 sectors)
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{
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int res;
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dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n",
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__func__, __LINE__, sectors, start_sector);
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res = lv1_storage_read(dev->sbd.dev_id,
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dev->regions[dev->region_idx].id, start_sector,
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sectors, 0, dev->bounce_lpar, &dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__,
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__LINE__, res);
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return DID_ERROR << 16;
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}
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return 0;
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}
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static int ps3rom_write_request(struct ps3_storage_device *dev,
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struct scsi_cmnd *cmd, u32 start_sector,
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u32 sectors)
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{
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int res;
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dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n",
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__func__, __LINE__, sectors, start_sector);
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scsi_sg_copy_to_buffer(cmd, dev->bounce_buf, dev->bounce_size);
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res = lv1_storage_write(dev->sbd.dev_id,
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dev->regions[dev->region_idx].id, start_sector,
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sectors, 0, dev->bounce_lpar, &dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__,
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__LINE__, res);
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return DID_ERROR << 16;
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}
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return 0;
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}
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static int ps3rom_queuecommand_lck(struct scsi_cmnd *cmd,
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void (*done)(struct scsi_cmnd *))
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{
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struct ps3rom_private *priv = shost_priv(cmd->device->host);
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struct ps3_storage_device *dev = priv->dev;
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unsigned char opcode;
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int res;
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#ifdef DEBUG
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scsi_print_command(cmd);
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#endif
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priv->curr_cmd = cmd;
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cmd->scsi_done = done;
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opcode = cmd->cmnd[0];
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/*
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* While we can submit READ/WRITE SCSI commands as ATAPI commands,
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* it's recommended for various reasons (performance, error handling,
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* ...) to use lv1_storage_{read,write}() instead
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*/
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switch (opcode) {
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case READ_10:
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res = ps3rom_read_request(dev, cmd, srb10_lba(cmd),
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srb10_len(cmd));
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break;
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case WRITE_10:
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res = ps3rom_write_request(dev, cmd, srb10_lba(cmd),
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srb10_len(cmd));
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break;
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default:
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res = ps3rom_atapi_request(dev, cmd);
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break;
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}
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if (res) {
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memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
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cmd->result = res;
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cmd->sense_buffer[0] = 0x70;
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cmd->sense_buffer[2] = ILLEGAL_REQUEST;
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priv->curr_cmd = NULL;
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cmd->scsi_done(cmd);
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}
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return 0;
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}
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static DEF_SCSI_QCMD(ps3rom_queuecommand)
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static int decode_lv1_status(u64 status, unsigned char *sense_key,
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unsigned char *asc, unsigned char *ascq)
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{
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if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION)
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return -1;
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*sense_key = (status >> 16) & 0xff;
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*asc = (status >> 8) & 0xff;
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*ascq = status & 0xff;
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return 0;
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}
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static irqreturn_t ps3rom_interrupt(int irq, void *data)
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{
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struct ps3_storage_device *dev = data;
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struct Scsi_Host *host;
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struct ps3rom_private *priv;
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struct scsi_cmnd *cmd;
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int res;
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u64 tag, status;
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unsigned char sense_key, asc, ascq;
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res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
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/*
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* status = -1 may mean that ATAPI transport completed OK, but
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* ATAPI command itself resulted CHECK CONDITION
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* so, upper layer should issue REQUEST_SENSE to check the sense data
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*/
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if (tag != dev->tag)
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dev_err(&dev->sbd.core,
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"%s:%u: tag mismatch, got %llx, expected %llx\n",
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__func__, __LINE__, tag, dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
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__func__, __LINE__, res, status);
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return IRQ_HANDLED;
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}
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host = ps3_system_bus_get_drvdata(&dev->sbd);
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priv = shost_priv(host);
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cmd = priv->curr_cmd;
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if (!status) {
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/* OK, completed */
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if (cmd->sc_data_direction == DMA_FROM_DEVICE) {
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int len;
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len = scsi_sg_copy_from_buffer(cmd,
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dev->bounce_buf,
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dev->bounce_size);
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scsi_set_resid(cmd, scsi_bufflen(cmd) - len);
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}
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cmd->result = DID_OK << 16;
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goto done;
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}
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if (cmd->cmnd[0] == REQUEST_SENSE) {
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/* SCSI spec says request sense should never get error */
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dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n",
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__func__, __LINE__);
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cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION;
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goto done;
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}
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if (decode_lv1_status(status, &sense_key, &asc, &ascq)) {
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cmd->result = DID_ERROR << 16;
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goto done;
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}
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scsi_build_sense_buffer(0, cmd->sense_buffer, sense_key, asc, ascq);
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cmd->result = SAM_STAT_CHECK_CONDITION;
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done:
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priv->curr_cmd = NULL;
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cmd->scsi_done(cmd);
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return IRQ_HANDLED;
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}
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static struct scsi_host_template ps3rom_host_template = {
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.name = DEVICE_NAME,
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.slave_configure = ps3rom_slave_configure,
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.queuecommand = ps3rom_queuecommand,
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.can_queue = 1,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 1,
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.emulated = 1, /* only sg driver uses this */
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.max_sectors = PS3ROM_MAX_SECTORS,
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.use_clustering = ENABLE_CLUSTERING,
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.module = THIS_MODULE,
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};
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static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev)
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{
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struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
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int error;
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struct Scsi_Host *host;
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struct ps3rom_private *priv;
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if (dev->blk_size != CD_FRAMESIZE) {
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dev_err(&dev->sbd.core,
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"%s:%u: cannot handle block size %llu\n", __func__,
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__LINE__, dev->blk_size);
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return -EINVAL;
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}
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dev->bounce_size = BOUNCE_SIZE;
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dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
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if (!dev->bounce_buf)
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return -ENOMEM;
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error = ps3stor_setup(dev, ps3rom_interrupt);
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if (error)
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goto fail_free_bounce;
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host = scsi_host_alloc(&ps3rom_host_template,
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sizeof(struct ps3rom_private));
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if (!host) {
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dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n",
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__func__, __LINE__);
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goto fail_teardown;
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}
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priv = shost_priv(host);
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ps3_system_bus_set_drvdata(&dev->sbd, host);
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priv->dev = dev;
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/* One device/LUN per SCSI bus */
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host->max_id = 1;
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host->max_lun = 1;
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error = scsi_add_host(host, &dev->sbd.core);
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if (error) {
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dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n",
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__func__, __LINE__, error);
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error = -ENODEV;
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goto fail_host_put;
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}
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scsi_scan_host(host);
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return 0;
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fail_host_put:
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scsi_host_put(host);
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ps3_system_bus_set_drvdata(&dev->sbd, NULL);
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fail_teardown:
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ps3stor_teardown(dev);
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fail_free_bounce:
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kfree(dev->bounce_buf);
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return error;
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}
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static int ps3rom_remove(struct ps3_system_bus_device *_dev)
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{
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struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
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struct Scsi_Host *host = ps3_system_bus_get_drvdata(&dev->sbd);
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scsi_remove_host(host);
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ps3stor_teardown(dev);
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scsi_host_put(host);
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ps3_system_bus_set_drvdata(&dev->sbd, NULL);
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kfree(dev->bounce_buf);
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return 0;
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}
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static struct ps3_system_bus_driver ps3rom = {
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.match_id = PS3_MATCH_ID_STOR_ROM,
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.core.name = DEVICE_NAME,
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.core.owner = THIS_MODULE,
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.probe = ps3rom_probe,
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.remove = ps3rom_remove
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};
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static int __init ps3rom_init(void)
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{
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return ps3_system_bus_driver_register(&ps3rom);
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}
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static void __exit ps3rom_exit(void)
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{
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ps3_system_bus_driver_unregister(&ps3rom);
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}
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module_init(ps3rom_init);
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module_exit(ps3rom_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver");
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MODULE_AUTHOR("Sony Corporation");
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MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);
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