--- /dev/null
+/*
+ * PS3 Disk Storage Driver
+ *
+ * Copyright (C) 2007 Sony Computer Entertainment Inc.
+ * Copyright 2007 Sony Corp.
+ *
+ * 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.
+ */
+
+#include <linux/ata.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+#include <asm/lv1call.h>
+#include <asm/ps3stor.h>
+#include <asm/firmware.h>
+
+
+#define DEVICE_NAME "ps3disk"
+
+#define BOUNCE_SIZE (64*1024)
+
+#define PS3DISK_MAX_DISKS 16
+#define PS3DISK_MINORS 16
+
+
+#define PS3DISK_NAME "ps3d%c"
+
+
+struct ps3disk_private {
+ spinlock_t lock; /* Request queue spinlock */
+ struct request_queue *queue;
+ struct gendisk *gendisk;
+ unsigned int blocking_factor;
+ struct request *req;
+ u64 raw_capacity;
+ unsigned char model[ATA_ID_PROD_LEN+1];
+};
+
+
+#define LV1_STORAGE_SEND_ATA_COMMAND (2)
+#define LV1_STORAGE_ATA_HDDOUT (0x23)
+
+struct lv1_ata_cmnd_block {
+ u16 features;
+ u16 sector_count;
+ u16 LBA_low;
+ u16 LBA_mid;
+ u16 LBA_high;
+ u8 device;
+ u8 command;
+ u32 is_ext;
+ u32 proto;
+ u32 in_out;
+ u32 size;
+ u64 buffer;
+ u32 arglen;
+};
+
+enum lv1_ata_proto {
+ NON_DATA_PROTO = 0,
+ PIO_DATA_IN_PROTO = 1,
+ PIO_DATA_OUT_PROTO = 2,
+ DMA_PROTO = 3
+};
+
+enum lv1_ata_in_out {
+ DIR_WRITE = 0, /* memory -> device */
+ DIR_READ = 1 /* device -> memory */
+};
+
+static int ps3disk_major;
+
+
+static const struct block_device_operations ps3disk_fops = {
+ .owner = THIS_MODULE,
+};
+
+
+static void ps3disk_scatter_gather(struct ps3_storage_device *dev,
+ struct request *req, int gather)
+{
+ unsigned int offset = 0;
+ struct req_iterator iter;
+ struct bio_vec bvec;
+ unsigned int i = 0;
+ size_t size;
+ void *buf;
+
+ rq_for_each_segment(bvec, req, iter) {
+ unsigned long flags;
+ dev_dbg(&dev->sbd.core, "%s:%u: bio %u: %u sectors from %lu\n",
+ __func__, __LINE__, i, bio_sectors(iter.bio),
+ iter.bio->bi_iter.bi_sector);
+
+ size = bvec.bv_len;
+ buf = bvec_kmap_irq(&bvec, &flags);
+ if (gather)
+ memcpy(dev->bounce_buf+offset, buf, size);
+ else
+ memcpy(buf, dev->bounce_buf+offset, size);
+ offset += size;
+ flush_kernel_dcache_page(bvec.bv_page);
+ bvec_kunmap_irq(buf, &flags);
+ i++;
+ }
+}
+
+static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
+ struct request *req)
+{
+ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+ int write = rq_data_dir(req), res;
+ const char *op = write ? "write" : "read";
+ u64 start_sector, sectors;
+ unsigned int region_id = dev->regions[dev->region_idx].id;
+
+#ifdef DEBUG
+ unsigned int n = 0;
+ struct bio_vec bv;
+ struct req_iterator iter;
+
+ rq_for_each_segment(bv, req, iter)
+ n++;
+ dev_dbg(&dev->sbd.core,
+ "%s:%u: %s req has %u bvecs for %u sectors\n",
+ __func__, __LINE__, op, n, blk_rq_sectors(req));
+#endif
+
+ start_sector = blk_rq_pos(req) * priv->blocking_factor;
+ sectors = blk_rq_sectors(req) * priv->blocking_factor;
+ dev_dbg(&dev->sbd.core, "%s:%u: %s %llu sectors starting at %llu\n",
+ __func__, __LINE__, op, sectors, start_sector);
+
+ if (write) {
+ ps3disk_scatter_gather(dev, req, 1);
+
+ res = lv1_storage_write(dev->sbd.dev_id, region_id,
+ start_sector, sectors, 0,
+ dev->bounce_lpar, &dev->tag);
+ } else {
+ res = lv1_storage_read(dev->sbd.dev_id, region_id,
+ start_sector, sectors, 0,
+ dev->bounce_lpar, &dev->tag);
+ }
+ if (res) {
+ dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
+ __LINE__, op, res);
+ __blk_end_request_all(req, -EIO);
+ return 0;
+ }
+
+ priv->req = req;
+ return 1;
+}
+
+static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
+ struct request *req)
+{
+ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+ u64 res;
+
+ dev_dbg(&dev->sbd.core, "%s:%u: flush request\n", __func__, __LINE__);
+
+ res = lv1_storage_send_device_command(dev->sbd.dev_id,
+ LV1_STORAGE_ATA_HDDOUT, 0, 0, 0,
+ 0, &dev->tag);
+ if (res) {
+ dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
+ __func__, __LINE__, res);
+ __blk_end_request_all(req, -EIO);
+ return 0;
+ }
+
+ priv->req = req;
+ return 1;
+}
+
+static void ps3disk_do_request(struct ps3_storage_device *dev,
+ struct request_queue *q)
+{
+ struct request *req;
+
+ dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
+
+ while ((req = blk_fetch_request(q))) {
+ if (req->cmd_flags & REQ_FLUSH) {
+ if (ps3disk_submit_flush_request(dev, req))
+ break;
+ } else if (req->cmd_type == REQ_TYPE_FS) {
+ if (ps3disk_submit_request_sg(dev, req))
+ break;
+ } else {
+ blk_dump_rq_flags(req, DEVICE_NAME " bad request");
+ __blk_end_request_all(req, -EIO);
+ continue;
+ }
+ }
+}
+
+static void ps3disk_request(struct request_queue *q)
+{
+ struct ps3_storage_device *dev = q->queuedata;
+ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+
+ if (priv->req) {
+ dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
+ return;
+ }
+
+ ps3disk_do_request(dev, q);
+}
+
+static irqreturn_t ps3disk_interrupt(int irq, void *data)
+{
+ struct ps3_storage_device *dev = data;
+ struct ps3disk_private *priv;
+ struct request *req;
+ int res, read, error;
+ u64 tag, status;
+ const char *op;
+
+ res = lv1_storage_get_async_status(dev->sbd.dev_id, &tag, &status);
+
+ if (tag != dev->tag)
+ dev_err(&dev->sbd.core,
+ "%s:%u: tag mismatch, got %llx, expected %llx\n",
+ __func__, __LINE__, tag, dev->tag);
+
+ if (res) {
+ dev_err(&dev->sbd.core, "%s:%u: res=%d status=0x%llx\n",
+ __func__, __LINE__, res, status);
+ return IRQ_HANDLED;
+ }
+
+ priv = ps3_system_bus_get_drvdata(&dev->sbd);
+ req = priv->req;
+ if (!req) {
+ dev_dbg(&dev->sbd.core,
+ "%s:%u non-block layer request completed\n", __func__,
+ __LINE__);
+ dev->lv1_status = status;
+ complete(&dev->done);
+ return IRQ_HANDLED;
+ }
+
+ if (req->cmd_flags & REQ_FLUSH) {
+ read = 0;
+ op = "flush";
+ } else {
+ read = !rq_data_dir(req);
+ op = read ? "read" : "write";
+ }
+ if (status) {
+ dev_dbg(&dev->sbd.core, "%s:%u: %s failed 0x%llx\n", __func__,
+ __LINE__, op, status);
+ error = -EIO;
+ } else {
+ dev_dbg(&dev->sbd.core, "%s:%u: %s completed\n", __func__,
+ __LINE__, op);
+ error = 0;
+ if (read)
+ ps3disk_scatter_gather(dev, req, 0);
+ }
+
+ spin_lock(&priv->lock);
+ __blk_end_request_all(req, error);
+ priv->req = NULL;
+ ps3disk_do_request(dev, priv->queue);
+ spin_unlock(&priv->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int ps3disk_sync_cache(struct ps3_storage_device *dev)
+{
+ u64 res;
+
+ dev_dbg(&dev->sbd.core, "%s:%u: sync cache\n", __func__, __LINE__);
+
+ res = ps3stor_send_command(dev, LV1_STORAGE_ATA_HDDOUT, 0, 0, 0, 0);
+ if (res) {
+ dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
+ __func__, __LINE__, res);
+ return -EIO;
+ }
+ return 0;
+}
+
+
+/* ATA helpers copied from drivers/ata/libata-core.c */
+
+static void swap_buf_le16(u16 *buf, unsigned int buf_words)
+{
+#ifdef __BIG_ENDIAN
+ unsigned int i;
+
+ for (i = 0; i < buf_words; i++)
+ buf[i] = le16_to_cpu(buf[i]);
+#endif /* __BIG_ENDIAN */
+}
+
+static u64 ata_id_n_sectors(const u16 *id)
+{
+ if (ata_id_has_lba(id)) {
+ if (ata_id_has_lba48(id))
+ return ata_id_u64(id, 100);
+ else
+ return ata_id_u32(id, 60);
+ } else {
+ if (ata_id_current_chs_valid(id))
+ return ata_id_u32(id, 57);
+ else
+ return id[1] * id[3] * id[6];
+ }
+}
+
+static void ata_id_string(const u16 *id, unsigned char *s, unsigned int ofs,
+ unsigned int len)
+{
+ unsigned int c;
+
+ while (len > 0) {
+ c = id[ofs] >> 8;
+ *s = c;
+ s++;
+
+ c = id[ofs] & 0xff;
+ *s = c;
+ s++;
+
+ ofs++;
+ len -= 2;
+ }
+}
+
+static void ata_id_c_string(const u16 *id, unsigned char *s, unsigned int ofs,
+ unsigned int len)
+{
+ unsigned char *p;
+
+ WARN_ON(!(len & 1));
+
+ ata_id_string(id, s, ofs, len - 1);
+
+ p = s + strnlen(s, len - 1);
+ while (p > s && p[-1] == ' ')
+ p--;
+ *p = '\0';
+}
+
+static int ps3disk_identify(struct ps3_storage_device *dev)
+{
+ struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+ struct lv1_ata_cmnd_block ata_cmnd;
+ u16 *id = dev->bounce_buf;
+ u64 res;
+
+ dev_dbg(&dev->sbd.core, "%s:%u: identify disk\n", __func__, __LINE__);
+
+ memset(&ata_cmnd, 0, sizeof(struct lv1_ata_cmnd_block));
+ ata_cmnd.command = ATA_CMD_ID_ATA;
+ ata_cmnd.sector_count = 1;
+ ata_cmnd.size = ata_cmnd.arglen = ATA_ID_WORDS * 2;
+ ata_cmnd.buffer = dev->bounce_lpar;
+ ata_cmnd.proto = PIO_DATA_IN_PROTO;
+ ata_cmnd.in_out = DIR_READ;
+
+ res = ps3stor_send_command(dev, LV1_STORAGE_SEND_ATA_COMMAND,
+ ps3_mm_phys_to_lpar(__pa(&ata_cmnd)),
+ sizeof(ata_cmnd), ata_cmnd.buffer,
+ ata_cmnd.arglen);
+ if (res) {
+ dev_err(&dev->sbd.core, "%s:%u: identify disk failed 0x%llx\n",
+ __func__, __LINE__, res);
+ return -EIO;
+ }
+
+ swap_buf_le16(id, ATA_ID_WORDS);
+
+ /* All we're interested in are raw capacity and model name */
+ priv->raw_capacity = ata_id_n_sectors(id);
+ ata_id_c_string(id, priv->model, ATA_ID_PROD, sizeof(priv->model));
+ return 0;
+}
+
+static unsigned long ps3disk_mask;
+
+static DEFINE_MUTEX(ps3disk_mask_mutex);
+
+static int ps3disk_probe(struct ps3_system_bus_device *_dev)
+{
+ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
+ struct ps3disk_private *priv;
+ int error;
+ unsigned int devidx;
+ struct request_queue *queue;
+ struct gendisk *gendisk;
+
+ if (dev->blk_size < 512) {
+ dev_err(&dev->sbd.core,
+ "%s:%u: cannot handle block size %llu\n", __func__,
+ __LINE__, dev->blk_size);
+ return -EINVAL;
+ }
+
+ BUILD_BUG_ON(PS3DISK_MAX_DISKS > BITS_PER_LONG);
+ mutex_lock(&ps3disk_mask_mutex);
+ devidx = find_first_zero_bit(&ps3disk_mask, PS3DISK_MAX_DISKS);
+ if (devidx >= PS3DISK_MAX_DISKS) {
+ dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
+ __LINE__);
+ mutex_unlock(&ps3disk_mask_mutex);
+ return -ENOSPC;
+ }
+ __set_bit(devidx, &ps3disk_mask);
+ mutex_unlock(&ps3disk_mask_mutex);
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ error = -ENOMEM;
+ goto fail;
+ }
+
+ ps3_system_bus_set_drvdata(_dev, priv);
+ spin_lock_init(&priv->lock);
+
+ dev->bounce_size = BOUNCE_SIZE;
+ dev->bounce_buf = kmalloc(BOUNCE_SIZE, GFP_DMA);
+ if (!dev->bounce_buf) {
+ error = -ENOMEM;
+ goto fail_free_priv;
+ }
+
+ error = ps3stor_setup(dev, ps3disk_interrupt);
+ if (error)
+ goto fail_free_bounce;
+
+ ps3disk_identify(dev);
+
+ queue = blk_init_queue(ps3disk_request, &priv->lock);
+ if (!queue) {
+ dev_err(&dev->sbd.core, "%s:%u: blk_init_queue failed\n",
+ __func__, __LINE__);
+ error = -ENOMEM;
+ goto fail_teardown;
+ }
+
+ priv->queue = queue;
+ queue->queuedata = dev;
+
+ blk_queue_bounce_limit(queue, BLK_BOUNCE_HIGH);
+
+ blk_queue_max_hw_sectors(queue, dev->bounce_size >> 9);
+ blk_queue_segment_boundary(queue, -1UL);
+ blk_queue_dma_alignment(queue, dev->blk_size-1);
+ blk_queue_logical_block_size(queue, dev->blk_size);
+
+ blk_queue_flush(queue, REQ_FLUSH);
+
+ blk_queue_max_segments(queue, -1);
+ blk_queue_max_segment_size(queue, dev->bounce_size);
+
+ gendisk = alloc_disk(PS3DISK_MINORS);
+ if (!gendisk) {
+ dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n", __func__,
+ __LINE__);
+ error = -ENOMEM;
+ goto fail_cleanup_queue;
+ }
+
+ priv->gendisk = gendisk;
+ gendisk->major = ps3disk_major;
+ gendisk->first_minor = devidx * PS3DISK_MINORS;
+ gendisk->fops = &ps3disk_fops;
+ gendisk->queue = queue;
+ gendisk->private_data = dev;
+ 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 (%llu 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);
+ 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);
+ 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);
Code Review / kvmfornfv.git / blobdiff