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drivers/block/ps3disk.c
13.5 KB
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// SPDX-License-Identifier: GPL-2.0-only |
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/* * PS3 Disk Storage Driver * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2007 Sony Corp. |
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*/ #include <linux/ata.h> |
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#include <linux/blk-mq.h> |
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#include <linux/slab.h> |
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#include <linux/module.h> |
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#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 request_queue *queue; |
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struct blk_mq_tag_set tag_set; |
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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; |
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static const struct block_device_operations ps3disk_fops = { |
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.owner = THIS_MODULE, }; static void ps3disk_scatter_gather(struct ps3_storage_device *dev, struct request *req, int gather) { unsigned int offset = 0; |
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struct req_iterator iter; |
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struct bio_vec bvec; |
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unsigned int i = 0; |
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size_t size; void *buf; |
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rq_for_each_segment(bvec, req, iter) { unsigned long flags; |
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dev_dbg(&dev->sbd.core, "%s:%u: bio %u: %u sectors from %llu ", |
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__func__, __LINE__, i, bio_sectors(iter.bio), iter.bio->bi_iter.bi_sector); |
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|
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size = bvec.bv_len; buf = bvec_kmap_irq(&bvec, &flags); |
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if (gather) memcpy(dev->bounce_buf+offset, buf, size); else memcpy(buf, dev->bounce_buf+offset, size); offset += size; |
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flush_kernel_dcache_page(bvec.bv_page); |
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bvec_kunmap_irq(buf, &flags); |
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i++; } } |
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static blk_status_t ps3disk_submit_request_sg(struct ps3_storage_device *dev, struct request *req) |
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{ |
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struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); |
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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; |
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struct bio_vec bv; |
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struct req_iterator iter; |
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|
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rq_for_each_segment(bv, req, iter) |
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n++; dev_dbg(&dev->sbd.core, |
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"%s:%u: %s req has %u bvecs for %u sectors ", __func__, __LINE__, op, n, blk_rq_sectors(req)); |
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#endif |
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start_sector = blk_rq_pos(req) * priv->blocking_factor; sectors = blk_rq_sectors(req) * priv->blocking_factor; |
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dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu ", |
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__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 ", __func__, __LINE__, op, res); |
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return BLK_STS_IOERR; |
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} priv->req = req; |
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return BLK_STS_OK; |
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} |
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static blk_status_t ps3disk_submit_flush_request(struct ps3_storage_device *dev, struct request *req) |
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{ |
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struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); |
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u64 res; dev_dbg(&dev->sbd.core, "%s:%u: flush request ", __func__, __LINE__); res = lv1_storage_send_device_command(dev->sbd.dev_id, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0, &dev->tag); if (res) { |
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dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx ", |
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__func__, __LINE__, res); |
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return BLK_STS_IOERR; |
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} priv->req = req; |
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return BLK_STS_OK; |
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} |
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static blk_status_t ps3disk_do_request(struct ps3_storage_device *dev, struct request *req) |
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{ |
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dev_dbg(&dev->sbd.core, "%s:%u ", __func__, __LINE__); |
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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; |
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} } |
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static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) |
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{ |
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struct request_queue *q = hctx->queue; |
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struct ps3_storage_device *dev = q->queuedata; |
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struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); |
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blk_status_t ret; |
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|
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blk_mq_start_request(bd->rq); spin_lock_irq(&priv->lock); ret = ps3disk_do_request(dev, bd->rq); spin_unlock_irq(&priv->lock); |
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|
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return ret; |
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} static irqreturn_t ps3disk_interrupt(int irq, void *data) { struct ps3_storage_device *dev = data; struct ps3disk_private *priv; struct request *req; |
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int res, read; blk_status_t error; |
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u64 tag, status; |
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const char *op; res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status); if (tag != dev->tag) dev_err(&dev->sbd.core, |
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"%s:%u: tag mismatch, got %llx, expected %llx ", |
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__func__, __LINE__, tag, dev->tag); if (res) { |
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dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx ", |
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__func__, __LINE__, res, status); return IRQ_HANDLED; } |
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priv = ps3_system_bus_get_drvdata(&dev->sbd); |
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req = priv->req; if (!req) { dev_dbg(&dev->sbd.core, "%s:%u non-block layer request completed ", __func__, __LINE__); dev->lv1_status = status; complete(&dev->done); return IRQ_HANDLED; } |
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if (req_op(req) == REQ_OP_FLUSH) { |
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read = 0; |
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op = "flush"; } else { read = !rq_data_dir(req); |
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op = read ? "read" : "write"; } if (status) { |
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dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx ", __func__, |
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__LINE__, op, status); |
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error = BLK_STS_IOERR; |
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} else { dev_dbg(&dev->sbd.core, "%s:%u: %s completed ", __func__, __LINE__, op); |
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error = 0; |
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if (read) ps3disk_scatter_gather(dev, req, 0); } spin_lock(&priv->lock); |
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priv->req = NULL; |
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blk_mq_end_request(req, error); |
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spin_unlock(&priv->lock); |
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blk_mq_run_hw_queues(priv->queue, true); |
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return IRQ_HANDLED; } static int ps3disk_sync_cache(struct ps3_storage_device *dev) { u64 res; dev_dbg(&dev->sbd.core, "%s:%u: sync cache ", __func__, __LINE__); res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0); if (res) { |
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dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx ", |
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__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) { |
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struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); |
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struct lv1_ata_cmnd_block ata_cmnd; u16 *id = dev->bounce_buf; u64 res; dev_dbg(&dev->sbd.core, "%s:%u: identify disk ", __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) { |
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dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx ", |
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__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; } |
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static unsigned long ps3disk_mask; static DEFINE_MUTEX(ps3disk_mask_mutex); |
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static const struct blk_mq_ops ps3disk_mq_ops = { .queue_rq = ps3disk_queue_rq, }; |
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static int ps3disk_probe(struct ps3_system_bus_device *_dev) |
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{ 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, |
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"%s:%u: cannot handle block size %llu ", __func__, |
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__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 ", __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; } |
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ps3_system_bus_set_drvdata(_dev, priv); |
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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); |
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queue = blk_mq_init_sq_queue(&priv->tag_set, &ps3disk_mq_ops, 1, BLK_MQ_F_SHOULD_MERGE); if (IS_ERR(queue)) { dev_err(&dev->sbd.core, "%s:%u: blk_mq_init_queue failed ", |
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__func__, __LINE__); |
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error = PTR_ERR(queue); |
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goto fail_teardown; } priv->queue = queue; queue->queuedata = dev; |
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blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9); |
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blk_queue_dma_alignment(queue, dev->blk_size-1); |
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blk_queue_logical_block_size(queue, dev->blk_size); |
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|
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blk_queue_write_cache(queue, true, false); |
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|
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blk_queue_max_segments(queue, -1); |
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blk_queue_max_segment_size(queue, dev->bounce_size); gendisk = alloc_disk(PS3DISK_MINORS); if (!gendisk) { dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed ", __func__, __LINE__); error = -ENOMEM; goto fail_cleanup_queue; } priv->gendisk = gendisk; gendisk->major = ps3disk_major; gendisk->first_minor = devidx * PS3DISK_MINORS; gendisk->fops = &ps3disk_fops; gendisk->queue = queue; gendisk->private_data = dev; |
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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, |
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"%s is a %s (%llu MiB total, %llu MiB for OtherOS) ", |
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gendisk->disk_name, priv->model, priv->raw_capacity >> 11, get_capacity(gendisk) >> 11); |
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device_add_disk(&dev->sbd.core, gendisk, NULL); |
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return 0; fail_cleanup_queue: blk_cleanup_queue(queue); |
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blk_mq_free_tag_set(&priv->tag_set); |
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fail_teardown: ps3stor_teardown(dev); fail_free_bounce: kfree(dev->bounce_buf); fail_free_priv: kfree(priv); |
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ps3_system_bus_set_drvdata(_dev, NULL); |
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fail: mutex_lock(&ps3disk_mask_mutex); __clear_bit(devidx, &ps3disk_mask); mutex_unlock(&ps3disk_mask_mutex); return error; } static int ps3disk_remove(struct ps3_system_bus_device *_dev) { struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core); |
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struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd); |
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mutex_lock(&ps3disk_mask_mutex); |
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__clear_bit(MINOR(disk_devt(priv->gendisk)) / PS3DISK_MINORS, |
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&ps3disk_mask); mutex_unlock(&ps3disk_mask_mutex); del_gendisk(priv->gendisk); blk_cleanup_queue(priv->queue); |
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blk_mq_free_tag_set(&priv->tag_set); |
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put_disk(priv->gendisk); dev_notice(&dev->sbd.core, "Synchronizing disk cache "); ps3disk_sync_cache(dev); ps3stor_teardown(dev); kfree(dev->bounce_buf); kfree(priv); |
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ps3_system_bus_set_drvdata(_dev, NULL); |
c6131fa52 ps3: Disk Storage... |
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return 0; } static struct ps3_system_bus_driver ps3disk = { .match_id = PS3_MATCH_ID_STOR_DISK, .core.name = DEVICE_NAME, .core.owner = THIS_MODULE, .probe = ps3disk_probe, .remove = ps3disk_remove, .shutdown = ps3disk_remove, }; static int __init ps3disk_init(void) { int error; if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) return -ENODEV; error = register_blkdev(0, DEVICE_NAME); if (error <= 0) { printk(KERN_ERR "%s:%u: register_blkdev failed %d ", __func__, __LINE__, error); return error; } ps3disk_major = error; pr_info("%s:%u: registered block device major %d ", __func__, __LINE__, ps3disk_major); error = ps3_system_bus_driver_register(&ps3disk); if (error) unregister_blkdev(ps3disk_major, DEVICE_NAME); return error; } static void __exit ps3disk_exit(void) { ps3_system_bus_driver_unregister(&ps3disk); unregister_blkdev(ps3disk_major, DEVICE_NAME); } module_init(ps3disk_init); module_exit(ps3disk_exit); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("PS3 Disk Storage Driver"); MODULE_AUTHOR("Sony Corporation"); MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_DISK); |