/* * PS3 BD/DVD/CD-ROM Storage Driver * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2007 Sony Corp. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published * by the Free Software Foundation; version 2 of the License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include <linux/cdrom.h> #include <linux/highmem.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_dbg.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <asm/lv1call.h> #include <asm/ps3stor.h> #define DEVICE_NAME "ps3rom" #define BOUNCE_SIZE (64*1024) #define PS3ROM_MAX_SECTORS (BOUNCE_SIZE / CD_FRAMESIZE) struct ps3rom_private { struct ps3_storage_device *dev; struct scsi_cmnd *curr_cmd; }; #define LV1_STORAGE_SEND_ATAPI_COMMAND (1) struct lv1_atapi_cmnd_block { u8 pkt[32]; /* packet command block */ u32 pktlen; /* should be 12 for ATAPI 8020 */ u32 blocks; u32 block_size; u32 proto; /* transfer mode */ u32 in_out; /* transfer direction */ u64 buffer; /* parameter except command block */ u32 arglen; /* length above */ }; enum lv1_atapi_proto { NON_DATA_PROTO = 0, PIO_DATA_IN_PROTO = 1, PIO_DATA_OUT_PROTO = 2, DMA_PROTO = 3 }; enum lv1_atapi_in_out { DIR_WRITE = 0, /* memory -> device */ DIR_READ = 1 /* device -> memory */ }; static int ps3rom_slave_configure(struct scsi_device *scsi_dev) { struct ps3rom_private *priv = shost_priv(scsi_dev->host); struct ps3_storage_device *dev = priv->dev; dev_dbg(&dev->sbd.core, "%s:%u: id %u, lun %u, channel %u\n", __func__, __LINE__, scsi_dev->id, scsi_dev->lun, scsi_dev->channel); /* * ATAPI SFF8020 devices use MODE_SENSE_10, * so we can prohibit MODE_SENSE_6 */ scsi_dev->use_10_for_ms = 1; /* we don't support {READ,WRITE}_6 */ scsi_dev->use_10_for_rw = 1; return 0; } /* * copy data from device into scatter/gather buffer */ static int fill_from_dev_buffer(struct scsi_cmnd *cmd, const void *buf) { int k, req_len, act_len, len, active; void *kaddr; struct scatterlist *sgpnt; unsigned int buflen; buflen = cmd->request_bufflen; if (!buflen) return 0; if (!cmd->request_buffer) return -1; sgpnt = cmd->request_buffer; active = 1; for (k = 0, req_len = 0, act_len = 0; k < cmd->use_sg; ++k, ++sgpnt) { if (active) { kaddr = kmap_atomic(sgpnt->page, KM_IRQ0); len = sgpnt->length; if ((req_len + len) > buflen) { active = 0; len = buflen - req_len; } memcpy(kaddr + sgpnt->offset, buf + req_len, len); flush_kernel_dcache_page(sgpnt->page); kunmap_atomic(kaddr, KM_IRQ0); act_len += len; } req_len += sgpnt->length; } cmd->resid = req_len - act_len; return 0; } /* * copy data from scatter/gather into device's buffer */ static int fetch_to_dev_buffer(struct scsi_cmnd *cmd, void *buf) { int k, req_len, len, fin; void *kaddr; struct scatterlist *sgpnt; unsigned int buflen; buflen = cmd->request_bufflen; if (!buflen) return 0; if (!cmd->request_buffer) return -1; sgpnt = cmd->request_buffer; for (k = 0, req_len = 0, fin = 0; k < cmd->use_sg; ++k, ++sgpnt) { kaddr = kmap_atomic(sgpnt->page, KM_IRQ0); len = sgpnt->length; if ((req_len + len) > buflen) { len = buflen - req_len; fin = 1; } memcpy(buf + req_len, kaddr + sgpnt->offset, len); kunmap_atomic(kaddr, KM_IRQ0); if (fin) return req_len + len; req_len += sgpnt->length; } return req_len; } static int ps3rom_atapi_request(struct ps3_storage_device *dev, struct scsi_cmnd *cmd) { struct lv1_atapi_cmnd_block atapi_cmnd; unsigned char opcode = cmd->cmnd[0]; int res; u64 lpar; dev_dbg(&dev->sbd.core, "%s:%u: send ATAPI command 0x%02x\n", __func__, __LINE__, opcode); memset(&atapi_cmnd, 0, sizeof(struct lv1_atapi_cmnd_block)); memcpy(&atapi_cmnd.pkt, cmd->cmnd, 12); atapi_cmnd.pktlen = 12; atapi_cmnd.block_size = 1; /* transfer size is block_size * blocks */ atapi_cmnd.blocks = atapi_cmnd.arglen = cmd->request_bufflen; atapi_cmnd.buffer = dev->bounce_lpar; switch (cmd->sc_data_direction) { case DMA_FROM_DEVICE: if (cmd->request_bufflen >= CD_FRAMESIZE) atapi_cmnd.proto = DMA_PROTO; else atapi_cmnd.proto = PIO_DATA_IN_PROTO; atapi_cmnd.in_out = DIR_READ; break; case DMA_TO_DEVICE: if (cmd->request_bufflen >= CD_FRAMESIZE) atapi_cmnd.proto = DMA_PROTO; else atapi_cmnd.proto = PIO_DATA_OUT_PROTO; atapi_cmnd.in_out = DIR_WRITE; res = fetch_to_dev_buffer(cmd, dev->bounce_buf); if (res < 0) return DID_ERROR << 16; break; default: atapi_cmnd.proto = NON_DATA_PROTO; break; } lpar = ps3_mm_phys_to_lpar(__pa(&atapi_cmnd)); res = lv1_storage_send_device_command(dev->sbd.dev_id, LV1_STORAGE_SEND_ATAPI_COMMAND, lpar, sizeof(atapi_cmnd), atapi_cmnd.buffer, atapi_cmnd.arglen, &dev->tag); if (res == LV1_DENIED_BY_POLICY) { dev_dbg(&dev->sbd.core, "%s:%u: ATAPI command 0x%02x denied by policy\n", __func__, __LINE__, opcode); return DID_ERROR << 16; } if (res) { dev_err(&dev->sbd.core, "%s:%u: ATAPI command 0x%02x failed %d\n", __func__, __LINE__, opcode, res); return DID_ERROR << 16; } return 0; } static inline unsigned int srb10_lba(const struct scsi_cmnd *cmd) { return cmd->cmnd[2] << 24 | cmd->cmnd[3] << 16 | cmd->cmnd[4] << 8 | cmd->cmnd[5]; } static inline unsigned int srb10_len(const struct scsi_cmnd *cmd) { return cmd->cmnd[7] << 8 | cmd->cmnd[8]; } static int ps3rom_read_request(struct ps3_storage_device *dev, struct scsi_cmnd *cmd, u32 start_sector, u32 sectors) { int res; dev_dbg(&dev->sbd.core, "%s:%u: read %u sectors starting at %u\n", __func__, __LINE__, sectors, start_sector); res = lv1_storage_read(dev->sbd.dev_id, dev->regions[dev->region_idx].id, start_sector, sectors, 0, dev->bounce_lpar, &dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: read failed %d\n", __func__, __LINE__, res); return DID_ERROR << 16; } return 0; } static int ps3rom_write_request(struct ps3_storage_device *dev, struct scsi_cmnd *cmd, u32 start_sector, u32 sectors) { int res; dev_dbg(&dev->sbd.core, "%s:%u: write %u sectors starting at %u\n", __func__, __LINE__, sectors, start_sector); res = fetch_to_dev_buffer(cmd, dev->bounce_buf); if (res < 0) return DID_ERROR << 16; res = lv1_storage_write(dev->sbd.dev_id, dev->regions[dev->region_idx].id, start_sector, sectors, 0, dev->bounce_lpar, &dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: write failed %d\n", __func__, __LINE__, res); return DID_ERROR << 16; } return 0; } static int ps3rom_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) { struct ps3rom_private *priv = shost_priv(cmd->device->host); struct ps3_storage_device *dev = priv->dev; unsigned char opcode; int res; #ifdef DEBUG scsi_print_command(cmd); #endif priv->curr_cmd = cmd; cmd->scsi_done = done; opcode = cmd->cmnd[0]; /* * While we can submit READ/WRITE SCSI commands as ATAPI commands, * it's recommended for various reasons (performance, error handling, * ...) to use lv1_storage_{read,write}() instead */ switch (opcode) { case READ_10: res = ps3rom_read_request(dev, cmd, srb10_lba(cmd), srb10_len(cmd)); break; case WRITE_10: res = ps3rom_write_request(dev, cmd, srb10_lba(cmd), srb10_len(cmd)); break; default: res = ps3rom_atapi_request(dev, cmd); break; } if (res) { memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); cmd->result = res; cmd->sense_buffer[0] = 0x70; cmd->sense_buffer[2] = ILLEGAL_REQUEST; priv->curr_cmd = NULL; cmd->scsi_done(cmd); } return 0; } static int decode_lv1_status(u64 status, unsigned char *sense_key, unsigned char *asc, unsigned char *ascq) { if (((status >> 24) & 0xff) != SAM_STAT_CHECK_CONDITION) return -1; *sense_key = (status >> 16) & 0xff; *asc = (status >> 8) & 0xff; *ascq = status & 0xff; return 0; } static irqreturn_t ps3rom_interrupt(int irq, void *data) { struct ps3_storage_device *dev = data; struct Scsi_Host *host; struct ps3rom_private *priv; struct scsi_cmnd *cmd; int res; u64 tag, status; unsigned char sense_key, asc, ascq; res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); /* * status = -1 may mean that ATAPI transport completed OK, but * ATAPI command itself resulted CHECK CONDITION * so, upper layer should issue REQUEST_SENSE to check the sense data */ if (tag != dev->tag) dev_err(&dev->sbd.core, "%s:%u: tag mismatch, got %lx, expected %lx\n", __func__, __LINE__, tag, dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%lx\n", __func__, __LINE__, res, status); return IRQ_HANDLED; } host = dev->sbd.core.driver_data; priv = shost_priv(host); cmd = priv->curr_cmd; if (!status) { /* OK, completed */ if (cmd->sc_data_direction == DMA_FROM_DEVICE) { res = fill_from_dev_buffer(cmd, dev->bounce_buf); if (res) { cmd->result = DID_ERROR << 16; goto done; } } cmd->result = DID_OK << 16; goto done; } if (cmd->cmnd[0] == REQUEST_SENSE) { /* SCSI spec says request sense should never get error */ dev_err(&dev->sbd.core, "%s:%u: end error without autosense\n", __func__, __LINE__); cmd->result = DID_ERROR << 16 | SAM_STAT_CHECK_CONDITION; goto done; } if (decode_lv1_status(status, &sense_key, &asc, &ascq)) { cmd->result = DID_ERROR << 16; goto done; } cmd->sense_buffer[0] = 0x70; cmd->sense_buffer[2] = sense_key; cmd->sense_buffer[7] = 16 - 6; cmd->sense_buffer[12] = asc; cmd->sense_buffer[13] = ascq; cmd->result = SAM_STAT_CHECK_CONDITION; done: priv->curr_cmd = NULL; cmd->scsi_done(cmd); return IRQ_HANDLED; } static struct scsi_host_template ps3rom_host_template = { .name = DEVICE_NAME, .slave_configure = ps3rom_slave_configure, .queuecommand = ps3rom_queuecommand, .can_queue = 1, .this_id = 7, .sg_tablesize = SG_ALL, .cmd_per_lun = 1, .emulated = 1, /* only sg driver uses this */ .max_sectors = PS3ROM_MAX_SECTORS, .use_clustering = ENABLE_CLUSTERING, .module = THIS_MODULE, }; static int __devinit ps3rom_probe(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); int error; struct Scsi_Host *host; struct ps3rom_private *priv; if (dev->blk_size != CD_FRAMESIZE) { dev_err(&dev->sbd.core, "%s:%u: cannot handle block size %lu\n", __func__, __LINE__, dev->blk_size); return -EINVAL; } dev->bounce_size = BOUNCE_SIZE; dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA); if (!dev->bounce_buf) return -ENOMEM; error = ps3stor_setup(dev, ps3rom_interrupt); if (error) goto fail_free_bounce; host = scsi_host_alloc(&ps3rom_host_template, sizeof(struct ps3rom_private)); if (!host) { dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed\n", __func__, __LINE__); goto fail_teardown; } priv = shost_priv(host); dev->sbd.core.driver_data = host; priv->dev = dev; /* One device/LUN per SCSI bus */ host->max_id = 1; host->max_lun = 1; error = scsi_add_host(host, &dev->sbd.core); if (error) { dev_err(&dev->sbd.core, "%s:%u: scsi_host_alloc failed %d\n", __func__, __LINE__, error); error = -ENODEV; goto fail_host_put; } scsi_scan_host(host); return 0; fail_host_put: scsi_host_put(host); dev->sbd.core.driver_data = NULL; fail_teardown: ps3stor_teardown(dev); fail_free_bounce: kfree(dev->bounce_buf); return error; } static int ps3rom_remove(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct Scsi_Host *host = dev->sbd.core.driver_data; scsi_remove_host(host); ps3stor_teardown(dev); scsi_host_put(host); dev->sbd.core.driver_data = NULL; kfree(dev->bounce_buf); return 0; } static struct ps3_system_bus_driver ps3rom = { .match_id = PS3_MATCH_ID_STOR_ROM, .core.name = DEVICE_NAME, .core.owner = THIS_MODULE, .probe = ps3rom_probe, .remove = ps3rom_remove }; static int __init ps3rom_init(void) { return ps3_system_bus_driver_register(&ps3rom); } static void __exit ps3rom_exit(void) { ps3_system_bus_driver_unregister(&ps3rom); } module_init(ps3rom_init); module_exit(ps3rom_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("PS3 BD/DVD/CD-ROM Storage Driver"); MODULE_AUTHOR("Sony Corporation"); MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_ROM);