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![Christoph Hellwig](/assets/img/avatar_default.png)
blk_cleanup_disk is nothing but a trivial wrapper for put_disk now, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Hannes Reinecke <hare@suse.de> Link: https://lore.kernel.org/r/20220619060552.1850436-7-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
560 lines
13 KiB
C
560 lines
13 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 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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rq_for_each_segment(bvec, req, iter) {
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if (gather)
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memcpy_from_bvec(dev->bounce_buf + offset, &bvec);
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else
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memcpy_to_bvec(&bvec, dev->bounce_buf + offset);
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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->gendisk->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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error = blk_mq_alloc_sq_tag_set(&priv->tag_set, &ps3disk_mq_ops, 1,
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BLK_MQ_F_SHOULD_MERGE);
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if (error)
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goto fail_teardown;
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gendisk = blk_mq_alloc_disk(&priv->tag_set, dev);
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if (IS_ERR(gendisk)) {
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dev_err(&dev->sbd.core, "%s:%u: blk_mq_alloc_disk failed\n",
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__func__, __LINE__);
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error = PTR_ERR(gendisk);
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goto fail_free_tag_set;
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}
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queue = gendisk->queue;
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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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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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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->minors = PS3DISK_MINORS;
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gendisk->fops = &ps3disk_fops;
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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);
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dev_info(&dev->sbd.core,
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"%s is a %s (%llu MiB total, %llu MiB for OtherOS)\n",
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gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
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get_capacity(gendisk) >> 11);
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error = device_add_disk(&dev->sbd.core, gendisk, NULL);
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if (error)
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goto fail_cleanup_disk;
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return 0;
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fail_cleanup_disk:
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put_disk(gendisk);
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fail_free_tag_set:
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blk_mq_free_tag_set(&priv->tag_set);
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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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fail_free_priv:
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kfree(priv);
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ps3_system_bus_set_drvdata(_dev, NULL);
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fail:
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mutex_lock(&ps3disk_mask_mutex);
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__clear_bit(devidx, &ps3disk_mask);
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mutex_unlock(&ps3disk_mask_mutex);
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return error;
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}
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static void ps3disk_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);
|
|
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);
|
|
put_disk(priv->gendisk);
|
|
blk_mq_free_tag_set(&priv->tag_set);
|
|
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);
|
|
}
|
|
|
|
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);
|