![Kiyoshi Ueda](/assets/img/avatar_default.png)
This patch converts ps3disk to use blk_end_request interfaces. Related 'uptodate' arguments are converted to 'error'. Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com> Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
606 lines
14 KiB
C
606 lines
14 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published
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* by the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <linux/ata.h>
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#include <linux/blkdev.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 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 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,
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"%s:%u: bio %u: %u segs %u sectors from %lu\n",
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__func__, __LINE__, i, bio_segments(iter.bio),
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bio_sectors(iter.bio),
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(unsigned long)iter.bio->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(bvec, &flags);
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i++;
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}
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}
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static int 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 = dev->sbd.core.driver_data;
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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 %lu sectors %lu hard sectors\n",
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__func__, __LINE__, op, n, req->nr_sectors,
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req->hard_nr_sectors);
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#endif
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start_sector = req->sector * priv->blocking_factor;
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sectors = req->nr_sectors * priv->blocking_factor;
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dev_dbg(&dev->sbd.core, "%s:%u: %s %lu sectors starting at %lu\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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end_request(req, 0);
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return 0;
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}
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priv->req = req;
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return 1;
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}
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static int 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 = dev->sbd.core.driver_data;
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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%lx\n",
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__func__, __LINE__, res);
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end_request(req, 0);
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return 0;
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}
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priv->req = req;
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return 1;
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}
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static void ps3disk_do_request(struct ps3_storage_device *dev,
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struct request_queue *q)
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{
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struct request *req;
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dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
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while ((req = elv_next_request(q))) {
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if (blk_fs_request(req)) {
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if (ps3disk_submit_request_sg(dev, req))
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break;
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} else if (req->cmd_type == REQ_TYPE_FLUSH) {
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if (ps3disk_submit_flush_request(dev, req))
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break;
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} else {
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blk_dump_rq_flags(req, DEVICE_NAME " bad request");
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end_request(req, 0);
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continue;
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}
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}
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}
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static void ps3disk_request(struct request_queue *q)
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{
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struct ps3_storage_device *dev = q->queuedata;
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struct ps3disk_private *priv = dev->sbd.core.driver_data;
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if (priv->req) {
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dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
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return;
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}
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ps3disk_do_request(dev, q);
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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, error;
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u64 tag, status;
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unsigned long num_sectors;
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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 %lx, expected %lx\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%lx\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 = dev->sbd.core.driver_data;
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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->cmd_type == REQ_TYPE_FLUSH) {
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read = 0;
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num_sectors = req->hard_cur_sectors;
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op = "flush";
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} else {
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read = !rq_data_dir(req);
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num_sectors = req->nr_sectors;
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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%lx\n", __func__,
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__LINE__, op, status);
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error = -EIO;
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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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__blk_end_request(req, error, num_sectors << 9);
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priv->req = NULL;
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ps3disk_do_request(dev, priv->queue);
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spin_unlock(&priv->lock);
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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%lx\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 = dev->sbd.core.driver_data;
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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%lx\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 void ps3disk_prepare_flush(struct request_queue *q, struct request *req)
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{
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struct ps3_storage_device *dev = q->queuedata;
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dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
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memset(req->cmd, 0, sizeof(req->cmd));
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req->cmd_type = REQ_TYPE_FLUSH;
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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 int __devinit 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 %lu\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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dev->sbd.core.driver_data = 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_init_queue(ps3disk_request, &priv->lock);
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if (!queue) {
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dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
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__func__, __LINE__);
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error = -ENOMEM;
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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_bounce_limit(queue, BLK_BOUNCE_HIGH);
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blk_queue_max_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_hardsect_size(queue, dev->blk_size);
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blk_queue_ordered(queue, QUEUE_ORDERED_DRAIN_FLUSH,
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ps3disk_prepare_flush);
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blk_queue_max_phys_segments(queue, -1);
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blk_queue_max_hw_segments(queue, -1);
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blk_queue_max_segment_size(queue, dev->bounce_size);
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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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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;
|
|
gendisk->queue = queue;
|
|
gendisk->private_data = dev;
|
|
gendisk->driverfs_dev = &dev->sbd.core;
|
|
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 (%lu MiB total, %lu MiB for OtherOS)\n",
|
|
gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
|
|
get_capacity(gendisk) >> 11);
|
|
|
|
add_disk(gendisk);
|
|
return 0;
|
|
|
|
fail_cleanup_queue:
|
|
blk_cleanup_queue(queue);
|
|
fail_teardown:
|
|
ps3stor_teardown(dev);
|
|
fail_free_bounce:
|
|
kfree(dev->bounce_buf);
|
|
fail_free_priv:
|
|
kfree(priv);
|
|
dev->sbd.core.driver_data = 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 = dev->sbd.core.driver_data;
|
|
|
|
mutex_lock(&ps3disk_mask_mutex);
|
|
__clear_bit(priv->gendisk->first_minor / PS3DISK_MINORS,
|
|
&ps3disk_mask);
|
|
mutex_unlock(&ps3disk_mask_mutex);
|
|
del_gendisk(priv->gendisk);
|
|
blk_cleanup_queue(priv->queue);
|
|
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);
|
|
dev->sbd.core.driver_data = 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);
|