// SPDX-License-Identifier: GPL-2.0-only/* * PS3 Disk Storage Driver * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2007 Sony Corp. */ #include <linux/ata.h>#include <linux/blk-mq.h>#include <linux/slab.h>#include <linux/module.h> #include <asm/lv1call.h>#include <asm/ps3stor.h>#include <asm/firmware.h> #define DEVICE_NAME "ps3disk" #define BOUNCE_SIZE (64*1024) #define PS3DISK_MAX_DISKS 16#define PS3DISK_MINORS 16 #define PS3DISK_NAME "ps3d%c" struct ps3disk_private { spinlock_t lock; /* Request queue spinlock */ struct blk_mq_tag_set tag_set; struct gendisk *gendisk; unsigned int blocking_factor; struct request *req; u64 raw_capacity; unsigned char model[ATA_ID_PROD_LEN+1];}; #define LV1_STORAGE_SEND_ATA_COMMAND (2)#define LV1_STORAGE_ATA_HDDOUT (0x23) struct lv1_ata_cmnd_block { u16 features; u16 sector_count; u16 LBA_low; u16 LBA_mid; u16 LBA_high; u8 device; u8 command; u32 is_ext; u32 proto; u32 in_out; u32 size; u64 buffer; u32 arglen;}; enum lv1_ata_proto { NON_DATA_PROTO = 0, PIO_DATA_IN_PROTO = 1, PIO_DATA_OUT_PROTO = 2, DMA_PROTO = 3}; enum lv1_ata_in_out { DIR_WRITE = 0, /* memory -> device */ DIR_READ = 1 /* device -> memory */}; static int ps3disk_major; static const struct block_device_operations ps3disk_fops = { .owner = THIS_MODULE,}; static void ps3disk_scatter_gather(struct ps3_storage_device *dev, struct request *req, int gather){ unsigned int offset = 0; struct req_iterator iter; struct bio_vec bvec; rq_for_each_segment(bvec, req, iter) { if (gather) memcpy_from_bvec(dev->bounce_buf + offset, &bvec); else memcpy_to_bvec(&bvec, dev->bounce_buf + offset); }} static blk_status_t ps3disk_submit_request_sg(struct ps3_storage_device *dev, struct request *req){ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); int write = rq_data_dir(req), res; const char *op = write ? "write" : "read"; u64 start_sector, sectors; unsigned int region_id = dev->regions[dev->region_idx].id; #ifdef DEBUG unsigned int n = 0; struct bio_vec bv; struct req_iterator iter; rq_for_each_segment(bv, req, iter) n++; dev_dbg(&dev->sbd.core, "%s:%u: %s req has %u bvecs for %u sectors\n", __func__, __LINE__, op, n, blk_rq_sectors(req));#endif start_sector = blk_rq_pos(req) * priv->blocking_factor; sectors = blk_rq_sectors(req) * priv->blocking_factor; dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n", __func__, __LINE__, op, sectors, start_sector); if (write) { ps3disk_scatter_gather(dev, req, 1); res = lv1_storage_write(dev->sbd.dev_id, region_id, start_sector, sectors, 0, dev->bounce_lpar, &dev->tag); } else { res = lv1_storage_read(dev->sbd.dev_id, region_id, start_sector, sectors, 0, dev->bounce_lpar, &dev->tag); } if (res) { dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__, __LINE__, op, res); return BLK_STS_IOERR; } priv->req = req; return BLK_STS_OK;} static blk_status_t ps3disk_submit_flush_request(struct ps3_storage_device *dev, struct request *req){ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); u64 res; dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__); res = lv1_storage_send_device_command(dev->sbd.dev_id, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0, &dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n", __func__, __LINE__, res); return BLK_STS_IOERR; } priv->req = req; return BLK_STS_OK;} static blk_status_t ps3disk_do_request(struct ps3_storage_device *dev, struct request *req){ dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__); switch (req_op(req)) { case REQ_OP_FLUSH: return ps3disk_submit_flush_request(dev, req); case REQ_OP_READ: case REQ_OP_WRITE: return ps3disk_submit_request_sg(dev, req); default: blk_dump_rq_flags(req, DEVICE_NAME " bad request"); return BLK_STS_IOERR; }} static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd){ struct request_queue *q = hctx->queue; struct ps3_storage_device *dev = q->queuedata; struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); blk_status_t ret; blk_mq_start_request(bd->rq); spin_lock_irq(&priv->lock); ret = ps3disk_do_request(dev, bd->rq); spin_unlock_irq(&priv->lock); return ret;} static irqreturn_t ps3disk_interrupt(int irq, void *data){ struct ps3_storage_device *dev = data; struct ps3disk_private *priv; struct request *req; int res, read; blk_status_t error; u64 tag, status; const char *op; res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); if (tag != dev->tag) dev_err(&dev->sbd.core, "%s:%u: tag mismatch, got %llx, expected %llx\n", __func__, __LINE__, tag, dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n", __func__, __LINE__, res, status); return IRQ_HANDLED; } priv = ps3_system_bus_get_drvdata(&dev->sbd); req = priv->req; if (!req) { dev_dbg(&dev->sbd.core, "%s:%u non-block layer request completed\n", __func__, __LINE__); dev->lv1_status = status; complete(&dev->done); return IRQ_HANDLED; } if (req_op(req) == REQ_OP_FLUSH) { read = 0; op = "flush"; } else { read = !rq_data_dir(req); op = read ? "read" : "write"; } if (status) { dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__, __LINE__, op, status); error = BLK_STS_IOERR; } else { dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__, op); error = 0; if (read) ps3disk_scatter_gather(dev, req, 0); } spin_lock(&priv->lock); priv->req = NULL; blk_mq_end_request(req, error); spin_unlock(&priv->lock); blk_mq_run_hw_queues(priv->gendisk->queue, true); return IRQ_HANDLED;} static int ps3disk_sync_cache(struct ps3_storage_device *dev){ u64 res; dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__); res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0); if (res) { dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n", __func__, __LINE__, res); return -EIO; } return 0;} /* ATA helpers copied from drivers/ata/libata-core.c */ static void swap_buf_le16(u16 *buf, unsigned int buf_words){#ifdef __BIG_ENDIAN unsigned int i; for (i = 0; i < buf_words; i++) buf[i] = le16_to_cpu(buf[i]);#endif /* __BIG_ENDIAN */} static u64 ata_id_n_sectors(const u16 *id){ if (ata_id_has_lba(id)) { if (ata_id_has_lba48(id)) return ata_id_u64(id, 100); else return ata_id_u32(id, 60); } else { if (ata_id_current_chs_valid(id)) return ata_id_u32(id, 57); else return id[1] * id[3] * id[6]; }} static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len){ unsigned int c; while (len > 0) { c = id[ofs] >> 8; *s = c; s++; c = id[ofs] & 0xff; *s = c; s++; ofs++; len -= 2; }} static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len){ unsigned char *p; WARN_ON(!(len & 1)); ata_id_string(id, s, ofs, len - 1); p = s + strnlen(s, len - 1); while (p > s && p[-1] == ' ') p--; *p = '\0';} static int ps3disk_identify(struct ps3_storage_device *dev){ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); struct lv1_ata_cmnd_block ata_cmnd; u16 *id = dev->bounce_buf; u64 res; dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__); memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block)); ata_cmnd.command = ATA_CMD_ID_ATA; ata_cmnd.sector_count = 1; ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2; ata_cmnd.buffer = dev->bounce_lpar; ata_cmnd.proto = PIO_DATA_IN_PROTO; ata_cmnd.in_out = DIR_READ; res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND, ps3_mm_phys_to_lpar(__pa(&ata_cmnd)), sizeof(ata_cmnd), ata_cmnd.buffer, ata_cmnd.arglen); if (res) { dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n", __func__, __LINE__, res); return -EIO; } swap_buf_le16(id, ATA_ID_WORDS); /* All we're interested in are raw capacity and model name */ priv->raw_capacity = ata_id_n_sectors(id); ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model)); return 0;} static unsigned long ps3disk_mask; static DEFINE_MUTEX(ps3disk_mask_mutex); static const struct blk_mq_ops ps3disk_mq_ops = { .queue_rq = ps3disk_queue_rq,}; static int ps3disk_probe(struct ps3_system_bus_device *_dev){ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct ps3disk_private *priv; int error; unsigned int devidx; struct request_queue *queue; struct gendisk *gendisk; if (dev->blk_size < 512) { dev_err(&dev->sbd.core, "%s:%u: cannot handle block size %llu\n", __func__, __LINE__, dev->blk_size); return -EINVAL; } BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG); mutex_lock(&ps3disk_mask_mutex); devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS); if (devidx >= PS3DISK_MAX_DISKS) { dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__, __LINE__); mutex_unlock(&ps3disk_mask_mutex); return -ENOSPC; } __set_bit(devidx, &ps3disk_mask); mutex_unlock(&ps3disk_mask_mutex); priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { error = -ENOMEM; goto fail; } ps3_system_bus_set_drvdata(_dev, priv); spin_lock_init(&priv->lock); dev->bounce_size = BOUNCE_SIZE; dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA); if (!dev->bounce_buf) { error = -ENOMEM; goto fail_free_priv; } error = ps3stor_setup(dev, ps3disk_interrupt); if (error) goto fail_free_bounce; ps3disk_identify(dev); error = blk_mq_alloc_sq_tag_set(&priv->tag_set, &ps3disk_mq_ops, 1, BLK_MQ_F_SHOULD_MERGE); if (error) goto fail_teardown; gendisk = blk_mq_alloc_disk(&priv->tag_set, dev); if (IS_ERR(gendisk)) { dev_err(&dev->sbd.core, "%s:%u: blk_mq_alloc_disk failed\n", __func__, __LINE__); error = PTR_ERR(gendisk); goto fail_free_tag_set; } queue = gendisk->queue; blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9); blk_queue_dma_alignment(queue, dev->blk_size-1); blk_queue_logical_block_size(queue, dev->blk_size); blk_queue_write_cache(queue, true, false); blk_queue_max_segments(queue, -1); blk_queue_max_segment_size(queue, dev->bounce_size); priv->gendisk = gendisk; gendisk->major = ps3disk_major; gendisk->first_minor = devidx * PS3DISK_MINORS; gendisk->minors = PS3DISK_MINORS; gendisk->fops = &ps3disk_fops; gendisk->private_data = dev; snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME, devidx+'a'); priv->blocking_factor = dev->blk_size >> 9; set_capacity(gendisk, dev->regions[dev->region_idx].size*priv->blocking_factor); dev_info(&dev->sbd.core, "%s is a %s (%llu MiB total, %llu MiB for OtherOS)\n", gendisk->disk_name, priv->model, priv->raw_capacity >> 11, get_capacity(gendisk) >> 11); error = device_add_disk(&dev->sbd.core, gendisk, NULL); if (error) goto fail_cleanup_disk; return 0;fail_cleanup_disk: put_disk(gendisk);fail_free_tag_set: blk_mq_free_tag_set(&priv->tag_set);fail_teardown: ps3stor_teardown(dev);fail_free_bounce: kfree(dev->bounce_buf);fail_free_priv: kfree(priv); ps3_system_bus_set_drvdata(_dev, NULL);fail: mutex_lock(&ps3disk_mask_mutex); __clear_bit(devidx, &ps3disk_mask); mutex_unlock(&ps3disk_mask_mutex); return error;} static void ps3disk_remove(struct ps3_system_bus_device *_dev){ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); mutex_lock(&ps3disk_mask_mutex); __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS, &ps3disk_mask);Lines 1–500 of 560. 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// SPDX-License-Identifier: GPL-2.0-only /* * PS3 Disk Storage Driver * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2007 Sony Corp. */ #include <linux/ata.h> #include <linux/blk-mq.h> #include <linux/slab.h> #include <linux/module.h> #include <asm/lv1call.h> #include <asm/ps3stor.h> #include <asm/firmware.h> #define DEVICE_NAME "ps3disk" #define BOUNCE_SIZE (64*1024) #define PS3DISK_MAX_DISKS 16 #define PS3DISK_MINORS 16 #define PS3DISK_NAME "ps3d%c" struct ps3disk_private { spinlock_t lock; /* Request queue spinlock */ struct blk_mq_tag_set tag_set; struct gendisk *gendisk; unsigned int blocking_factor; struct request *req; u64 raw_capacity; unsigned char model[ATA_ID_PROD_LEN+1]; }; #define LV1_STORAGE_SEND_ATA_COMMAND (2) #define LV1_STORAGE_ATA_HDDOUT (0x23) struct lv1_ata_cmnd_block { u16 features; u16 sector_count; u16 LBA_low; u16 LBA_mid; u16 LBA_high; u8 device; u8 command; u32 is_ext; u32 proto; u32 in_out; u32 size; u64 buffer; u32 arglen; }; enum lv1_ata_proto { NON_DATA_PROTO = 0, PIO_DATA_IN_PROTO = 1, PIO_DATA_OUT_PROTO = 2, DMA_PROTO = 3 }; enum lv1_ata_in_out { DIR_WRITE = 0, /* memory -> device */ DIR_READ = 1 /* device -> memory */ }; static int ps3disk_major; static const struct block_device_operations ps3disk_fops = { .owner = THIS_MODULE, }; static void ps3disk_scatter_gather(struct ps3_storage_device *dev, struct request *req, int gather) { unsigned int offset = 0; struct req_iterator iter; struct bio_vec bvec; rq_for_each_segment(bvec, req, iter) { if (gather) memcpy_from_bvec(dev->bounce_buf + offset, &bvec); else memcpy_to_bvec(&bvec, dev->bounce_buf + offset); } } static blk_status_t ps3disk_submit_request_sg(struct ps3_storage_device *dev, struct request *req) { struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); int write = rq_data_dir(req), res; const char *op = write ? "write" : "read"; u64 start_sector, sectors; unsigned int region_id = dev->regions[dev->region_idx].id; #ifdef DEBUG unsigned int n = 0; struct bio_vec bv; struct req_iterator iter; rq_for_each_segment(bv, req, iter) n++; dev_dbg(&dev->sbd.core, "%s:%u: %s req has %u bvecs for %u sectors\n", __func__, __LINE__, op, n, blk_rq_sectors(req)); #endif start_sector = blk_rq_pos(req) * priv->blocking_factor; sectors = blk_rq_sectors(req) * priv->blocking_factor; dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n", __func__, __LINE__, op, sectors, start_sector); if (write) { ps3disk_scatter_gather(dev, req, 1); res = lv1_storage_write(dev->sbd.dev_id, region_id, start_sector, sectors, 0, dev->bounce_lpar, &dev->tag); } else { res = lv1_storage_read(dev->sbd.dev_id, region_id, start_sector, sectors, 0, dev->bounce_lpar, &dev->tag); } if (res) { dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__, __LINE__, op, res); return BLK_STS_IOERR; } priv->req = req; return BLK_STS_OK; } static blk_status_t ps3disk_submit_flush_request(struct ps3_storage_device *dev, struct request *req) { struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); u64 res; dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__); res = lv1_storage_send_device_command(dev->sbd.dev_id, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0, &dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n", __func__, __LINE__, res); return BLK_STS_IOERR; } priv->req = req; return BLK_STS_OK; } static blk_status_t ps3disk_do_request(struct ps3_storage_device *dev, struct request *req) { dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__); switch (req_op(req)) { case REQ_OP_FLUSH: return ps3disk_submit_flush_request(dev, req); case REQ_OP_READ: case REQ_OP_WRITE: return ps3disk_submit_request_sg(dev, req); default: blk_dump_rq_flags(req, DEVICE_NAME " bad request"); return BLK_STS_IOERR; } } static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { struct request_queue *q = hctx->queue; struct ps3_storage_device *dev = q->queuedata; struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); blk_status_t ret; blk_mq_start_request(bd->rq); spin_lock_irq(&priv->lock); ret = ps3disk_do_request(dev, bd->rq); spin_unlock_irq(&priv->lock); return ret; } static irqreturn_t ps3disk_interrupt(int irq, void *data) { struct ps3_storage_device *dev = data; struct ps3disk_private *priv; struct request *req; int res, read; blk_status_t error; u64 tag, status; const char *op; res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); if (tag != dev->tag) dev_err(&dev->sbd.core, "%s:%u: tag mismatch, got %llx, expected %llx\n", __func__, __LINE__, tag, dev->tag); if (res) { dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n", __func__, __LINE__, res, status); return IRQ_HANDLED; } priv = ps3_system_bus_get_drvdata(&dev->sbd); req = priv->req; if (!req) { dev_dbg(&dev->sbd.core, "%s:%u non-block layer request completed\n", __func__, __LINE__); dev->lv1_status = status; complete(&dev->done); return IRQ_HANDLED; } if (req_op(req) == REQ_OP_FLUSH) { read = 0; op = "flush"; } else { read = !rq_data_dir(req); op = read ? "read" : "write"; } if (status) { dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__, __LINE__, op, status); error = BLK_STS_IOERR; } else { dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__, __LINE__, op); error = 0; if (read) ps3disk_scatter_gather(dev, req, 0); } spin_lock(&priv->lock); priv->req = NULL; blk_mq_end_request(req, error); spin_unlock(&priv->lock); blk_mq_run_hw_queues(priv->gendisk->queue, true); return IRQ_HANDLED; } static int ps3disk_sync_cache(struct ps3_storage_device *dev) { u64 res; dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__); res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0); if (res) { dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n", __func__, __LINE__, res); return -EIO; } return 0; } /* ATA helpers copied from drivers/ata/libata-core.c */ static void swap_buf_le16(u16 *buf, unsigned int buf_words) { #ifdef __BIG_ENDIAN unsigned int i; for (i = 0; i < buf_words; i++) buf[i] = le16_to_cpu(buf[i]); #endif /* __BIG_ENDIAN */ } static u64 ata_id_n_sectors(const u16 *id) { if (ata_id_has_lba(id)) { if (ata_id_has_lba48(id)) return ata_id_u64(id, 100); else return ata_id_u32(id, 60); } else { if (ata_id_current_chs_valid(id)) return ata_id_u32(id, 57); else return id[1] * id[3] * id[6]; } } static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len) { unsigned int c; while (len > 0) { c = id[ofs] >> 8; *s = c; s++; c = id[ofs] & 0xff; *s = c; s++; ofs++; len -= 2; } } static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs, unsigned int len) { unsigned char *p; WARN_ON(!(len & 1)); ata_id_string(id, s, ofs, len - 1); p = s + strnlen(s, len - 1); while (p > s && p[-1] == ' ') p--; *p = '\0'; } static int ps3disk_identify(struct ps3_storage_device *dev) { struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); struct lv1_ata_cmnd_block ata_cmnd; u16 *id = dev->bounce_buf; u64 res; dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__); memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block)); ata_cmnd.command = ATA_CMD_ID_ATA; ata_cmnd.sector_count = 1; ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2; ata_cmnd.buffer = dev->bounce_lpar; ata_cmnd.proto = PIO_DATA_IN_PROTO; ata_cmnd.in_out = DIR_READ; res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND, ps3_mm_phys_to_lpar(__pa(&ata_cmnd)), sizeof(ata_cmnd), ata_cmnd.buffer, ata_cmnd.arglen); if (res) { dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n", __func__, __LINE__, res); return -EIO; } swap_buf_le16(id, ATA_ID_WORDS); /* All we're interested in are raw capacity and model name */ priv->raw_capacity = ata_id_n_sectors(id); ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model)); return 0; } static unsigned long ps3disk_mask; static DEFINE_MUTEX(ps3disk_mask_mutex); static const struct blk_mq_ops ps3disk_mq_ops = { .queue_rq = ps3disk_queue_rq, }; static int ps3disk_probe(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct ps3disk_private *priv; int error; unsigned int devidx; struct request_queue *queue; struct gendisk *gendisk; if (dev->blk_size < 512) { dev_err(&dev->sbd.core, "%s:%u: cannot handle block size %llu\n", __func__, __LINE__, dev->blk_size); return -EINVAL; } BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG); mutex_lock(&ps3disk_mask_mutex); devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS); if (devidx >= PS3DISK_MAX_DISKS) { dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__, __LINE__); mutex_unlock(&ps3disk_mask_mutex); return -ENOSPC; } __set_bit(devidx, &ps3disk_mask); mutex_unlock(&ps3disk_mask_mutex); priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { error = -ENOMEM; goto fail; } ps3_system_bus_set_drvdata(_dev, priv); spin_lock_init(&priv->lock); dev->bounce_size = BOUNCE_SIZE; dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA); if (!dev->bounce_buf) { error = -ENOMEM; goto fail_free_priv; } error = ps3stor_setup(dev, ps3disk_interrupt); if (error) goto fail_free_bounce; ps3disk_identify(dev); error = blk_mq_alloc_sq_tag_set(&priv->tag_set, &ps3disk_mq_ops, 1, BLK_MQ_F_SHOULD_MERGE); if (error) goto fail_teardown; gendisk = blk_mq_alloc_disk(&priv->tag_set, dev); if (IS_ERR(gendisk)) { dev_err(&dev->sbd.core, "%s:%u: blk_mq_alloc_disk failed\n", __func__, __LINE__); error = PTR_ERR(gendisk); goto fail_free_tag_set; } queue = gendisk->queue; blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9); blk_queue_dma_alignment(queue, dev->blk_size-1); blk_queue_logical_block_size(queue, dev->blk_size); blk_queue_write_cache(queue, true, false); blk_queue_max_segments(queue, -1); blk_queue_max_segment_size(queue, dev->bounce_size); priv->gendisk = gendisk; gendisk->major = ps3disk_major; gendisk->first_minor = devidx * PS3DISK_MINORS; gendisk->minors = PS3DISK_MINORS; gendisk->fops = &ps3disk_fops; gendisk->private_data = dev; snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME, devidx+'a'); priv->blocking_factor = dev->blk_size >> 9; set_capacity(gendisk, dev->regions[dev->region_idx].size*priv->blocking_factor); dev_info(&dev->sbd.core, "%s is a %s (%llu MiB total, %llu MiB for OtherOS)\n", gendisk->disk_name, priv->model, priv->raw_capacity >> 11, get_capacity(gendisk) >> 11); error = device_add_disk(&dev->sbd.core, gendisk, NULL); if (error) goto fail_cleanup_disk; return 0; fail_cleanup_disk: put_disk(gendisk); fail_free_tag_set: blk_mq_free_tag_set(&priv->tag_set); fail_teardown: ps3stor_teardown(dev); fail_free_bounce: kfree(dev->bounce_buf); fail_free_priv: kfree(priv); ps3_system_bus_set_drvdata(_dev, NULL); fail: mutex_lock(&ps3disk_mask_mutex); __clear_bit(devidx, &ps3disk_mask); mutex_unlock(&ps3disk_mask_mutex); return error; } static void ps3disk_remove(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); mutex_lock(&ps3disk_mask_mutex); __clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS, &ps3disk_mask);