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Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 12 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.745497013@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
581 lines
14 KiB
C
581 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* PS3 Disk 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/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>
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#include <asm/ps3stor.h>
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#include <asm/firmware.h>
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#define DEVICE_NAME "ps3disk"
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#define BOUNCE_SIZE (64*1024)
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#define PS3DISK_MAX_DISKS 16
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#define PS3DISK_MINORS 16
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#define PS3DISK_NAME "ps3d%c"
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struct ps3disk_private {
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spinlock_t lock; /* Request queue spinlock */
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struct request_queue *queue;
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struct blk_mq_tag_set tag_set;
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struct gendisk *gendisk;
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unsigned int blocking_factor;
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struct request *req;
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u64 raw_capacity;
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unsigned char model[ATA_ID_PROD_LEN+1];
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};
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#define LV1_STORAGE_SEND_ATA_COMMAND (2)
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#define LV1_STORAGE_ATA_HDDOUT (0x23)
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struct lv1_ata_cmnd_block {
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u16 features;
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u16 sector_count;
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u16 LBA_low;
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u16 LBA_mid;
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u16 LBA_high;
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u8 device;
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u8 command;
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u32 is_ext;
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u32 proto;
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u32 in_out;
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u32 size;
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u64 buffer;
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u32 arglen;
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};
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enum lv1_ata_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_ata_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 ps3disk_major;
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static const struct block_device_operations ps3disk_fops = {
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.owner = THIS_MODULE,
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};
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static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
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struct request *req, int gather)
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{
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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;
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void *buf;
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rq_for_each_segment(bvec, req, iter) {
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unsigned long flags;
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dev_dbg(&dev->sbd.core, "%s:%u: bio %u: %u sectors from %llu\n",
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__func__, __LINE__, i, bio_sectors(iter.bio),
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iter.bio->bi_iter.bi_sector);
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size = bvec.bv_len;
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buf = bvec_kmap_irq(&bvec, &flags);
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if (gather)
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memcpy(dev->bounce_buf+offset, buf, size);
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else
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memcpy(buf, dev->bounce_buf+offset, size);
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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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}
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}
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static blk_status_t ps3disk_submit_request_sg(struct ps3_storage_device *dev,
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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;
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const char *op = write ? "write" : "read";
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u64 start_sector, sectors;
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unsigned int region_id = dev->regions[dev->region_idx].id;
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#ifdef DEBUG
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unsigned int n = 0;
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struct bio_vec bv;
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struct req_iterator iter;
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rq_for_each_segment(bv, req, iter)
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n++;
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dev_dbg(&dev->sbd.core,
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"%s:%u: %s req has %u bvecs for %u sectors\n",
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__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;
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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\n",
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__func__, __LINE__, op, sectors, start_sector);
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if (write) {
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ps3disk_scatter_gather(dev, req, 1);
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res = lv1_storage_write(dev->sbd.dev_id, region_id,
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start_sector, sectors, 0,
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dev->bounce_lpar, &dev->tag);
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} else {
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res = lv1_storage_read(dev->sbd.dev_id, region_id,
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start_sector, sectors, 0,
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dev->bounce_lpar, &dev->tag);
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}
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
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__LINE__, op, res);
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return BLK_STS_IOERR;
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}
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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,
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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;
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dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__);
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res = lv1_storage_send_device_command(dev->sbd.dev_id,
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LV1_STORAGE_ATA_HDDOUT, 0, 0, 0,
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0, &dev->tag);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
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__func__, __LINE__, res);
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return BLK_STS_IOERR;
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}
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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,
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struct request *req)
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{
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dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
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switch (req_op(req)) {
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case REQ_OP_FLUSH:
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return ps3disk_submit_flush_request(dev, req);
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case REQ_OP_READ:
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case REQ_OP_WRITE:
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return ps3disk_submit_request_sg(dev, req);
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default:
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blk_dump_rq_flags(req, DEVICE_NAME " bad request");
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return BLK_STS_IOERR;
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}
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}
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static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx,
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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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blk_mq_start_request(bd->rq);
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spin_lock_irq(&priv->lock);
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ret = ps3disk_do_request(dev, bd->rq);
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spin_unlock_irq(&priv->lock);
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return ret;
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}
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static irqreturn_t ps3disk_interrupt(int irq, void *data)
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{
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struct ps3_storage_device *dev = data;
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struct ps3disk_private *priv;
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struct request *req;
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int res, read;
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blk_status_t error;
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u64 tag, status;
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const char *op;
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res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
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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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priv = ps3_system_bus_get_drvdata(&dev->sbd);
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req = priv->req;
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if (!req) {
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dev_dbg(&dev->sbd.core,
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"%s:%u non-block layer request completed\n", __func__,
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__LINE__);
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dev->lv1_status = status;
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complete(&dev->done);
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return IRQ_HANDLED;
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}
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if (req_op(req) == REQ_OP_FLUSH) {
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read = 0;
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op = "flush";
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} else {
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read = !rq_data_dir(req);
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op = read ? "read" : "write";
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}
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if (status) {
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dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
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__LINE__, op, status);
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error = BLK_STS_IOERR;
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} else {
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dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
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__LINE__, op);
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error = 0;
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if (read)
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ps3disk_scatter_gather(dev, req, 0);
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}
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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;
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}
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static int ps3disk_sync_cache(struct ps3_storage_device *dev)
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{
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u64 res;
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dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
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res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
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__func__, __LINE__, res);
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return -EIO;
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}
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return 0;
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}
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/* ATA helpers copied from drivers/ata/libata-core.c */
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static void swap_buf_le16(u16 *buf, unsigned int buf_words)
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{
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#ifdef __BIG_ENDIAN
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unsigned int i;
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for (i = 0; i < buf_words; i++)
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buf[i] = le16_to_cpu(buf[i]);
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#endif /* __BIG_ENDIAN */
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}
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static u64 ata_id_n_sectors(const u16 *id)
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{
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if (ata_id_has_lba(id)) {
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if (ata_id_has_lba48(id))
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return ata_id_u64(id, 100);
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else
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return ata_id_u32(id, 60);
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} else {
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if (ata_id_current_chs_valid(id))
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return ata_id_u32(id, 57);
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else
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return id[1] * id[3] * id[6];
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}
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}
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static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
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unsigned int len)
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{
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unsigned int c;
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while (len > 0) {
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c = id[ofs] >> 8;
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*s = c;
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s++;
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c = id[ofs] & 0xff;
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*s = c;
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s++;
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ofs++;
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len -= 2;
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}
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}
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static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
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unsigned int len)
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{
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unsigned char *p;
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WARN_ON(!(len & 1));
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ata_id_string(id, s, ofs, len - 1);
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p = s + strnlen(s, len - 1);
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while (p > s && p[-1] == ' ')
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p--;
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*p = '\0';
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}
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static int ps3disk_identify(struct ps3_storage_device *dev)
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{
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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;
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u16 *id = dev->bounce_buf;
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u64 res;
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dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
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memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
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ata_cmnd.command = ATA_CMD_ID_ATA;
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ata_cmnd.sector_count = 1;
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ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
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ata_cmnd.buffer = dev->bounce_lpar;
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ata_cmnd.proto = PIO_DATA_IN_PROTO;
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ata_cmnd.in_out = DIR_READ;
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res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
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ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
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sizeof(ata_cmnd), ata_cmnd.buffer,
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ata_cmnd.arglen);
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if (res) {
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dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
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__func__, __LINE__, res);
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return -EIO;
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}
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swap_buf_le16(id, ATA_ID_WORDS);
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/* All we're interested in are raw capacity and model name */
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priv->raw_capacity = ata_id_n_sectors(id);
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ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
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return 0;
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}
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static unsigned long ps3disk_mask;
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static DEFINE_MUTEX(ps3disk_mask_mutex);
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static const struct blk_mq_ops ps3disk_mq_ops = {
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.queue_rq = ps3disk_queue_rq,
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};
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static int ps3disk_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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struct ps3disk_private *priv;
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int error;
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unsigned int devidx;
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struct request_queue *queue;
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struct gendisk *gendisk;
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if (dev->blk_size < 512) {
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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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BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
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mutex_lock(&ps3disk_mask_mutex);
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devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
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if (devidx >= PS3DISK_MAX_DISKS) {
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dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
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__LINE__);
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mutex_unlock(&ps3disk_mask_mutex);
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return -ENOSPC;
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}
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__set_bit(devidx, &ps3disk_mask);
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mutex_unlock(&ps3disk_mask_mutex);
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv) {
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error = -ENOMEM;
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goto fail;
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}
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ps3_system_bus_set_drvdata(_dev, priv);
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spin_lock_init(&priv->lock);
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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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error = -ENOMEM;
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goto fail_free_priv;
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}
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error = ps3stor_setup(dev, ps3disk_interrupt);
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if (error)
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goto fail_free_bounce;
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ps3disk_identify(dev);
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queue = blk_mq_init_sq_queue(&priv->tag_set, &ps3disk_mq_ops, 1,
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BLK_MQ_F_SHOULD_MERGE);
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if (IS_ERR(queue)) {
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dev_err(&dev->sbd.core, "%s:%u: blk_mq_init_queue failed\n",
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__func__, __LINE__);
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error = PTR_ERR(queue);
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goto fail_teardown;
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}
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priv->queue = queue;
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queue->queuedata = dev;
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blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
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blk_queue_segment_boundary(queue, -1UL);
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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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blk_queue_max_segments(queue, -1);
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blk_queue_max_segment_size(queue, dev->bounce_size);
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|
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gendisk = alloc_disk(PS3DISK_MINORS);
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if (!gendisk) {
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dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
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__LINE__);
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error = -ENOMEM;
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goto fail_cleanup_queue;
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}
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|
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priv->gendisk = gendisk;
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gendisk->major = ps3disk_major;
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gendisk->first_minor = devidx * PS3DISK_MINORS;
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gendisk->fops = &ps3disk_fops;
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gendisk->queue = queue;
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gendisk->private_data = dev;
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snprintf(gendisk->disk_name, sizeof(gendisk->disk_name), PS3DISK_NAME,
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devidx+'a');
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priv->blocking_factor = dev->blk_size >> 9;
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set_capacity(gendisk,
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|
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);
|
|
|
|
device_add_disk(&dev->sbd.core, gendisk, NULL);
|
|
return 0;
|
|
|
|
fail_cleanup_queue:
|
|
blk_cleanup_queue(queue);
|
|
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 int 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);
|
|
mutex_unlock(&ps3disk_mask_mutex);
|
|
del_gendisk(priv->gendisk);
|
|
blk_cleanup_queue(priv->queue);
|
|
blk_mq_free_tag_set(&priv->tag_set);
|
|
put_disk(priv->gendisk);
|
|
dev_notice(&dev->sbd.core, "Synchronizing disk cache\n");
|
|
ps3disk_sync_cache(dev);
|
|
ps3stor_teardown(dev);
|
|
kfree(dev->bounce_buf);
|
|
kfree(priv);
|
|
ps3_system_bus_set_drvdata(_dev, NULL);
|
|
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\n", __func__,
|
|
__LINE__, error);
|
|
return error;
|
|
}
|
|
ps3disk_major = error;
|
|
|
|
pr_info("%s:%u: registered block device major %d\n", __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);
|