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439 lines
10 KiB
439 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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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#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 %llu, 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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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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scsi_build_sense(cmd, 0, ILLEGAL_REQUEST, 0, 0); |
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cmd->result = res; |
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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(cmd, 0, sense_key, asc, ascq); |
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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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.emulated = 1, /* only sg driver uses this */ |
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.max_sectors = PS3ROM_MAX_SECTORS, |
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.module = THIS_MODULE, |
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}; |
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static int 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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error = -ENOMEM; |
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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 void 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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} |
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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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