[Cbe-oss-dev] [PATCH 14/15] ps3: Add a vflash driver for lpars other than OtherOS
Andre Heider
a.heider at gmail.com
Tue Aug 2 06:03:05 EST 2011
This driver refuses to work on OtherOS, and hence complements the
ps3flash driver - which only works on OtherOS.
A gendisk for each accessible region is created, and a default set
of region flags is provided - overwritable via a module param array.
Signed-off-by: Andre Heider <a.heider at gmail.com>
---
arch/powerpc/platforms/ps3/Kconfig | 16 +-
drivers/block/Makefile | 1 +
drivers/block/ps3vflash.c | 508 ++++++++++++++++++++++++++++++++++++
3 files changed, 524 insertions(+), 1 deletions(-)
create mode 100644 drivers/block/ps3vflash.c
diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
index 5eb956a..f8d865c 100644
--- a/arch/powerpc/platforms/ps3/Kconfig
+++ b/arch/powerpc/platforms/ps3/Kconfig
@@ -121,13 +121,27 @@ config PS3_FLASH
This support is required to access the PS3 FLASH ROM, which
contains the boot loader and some boot options.
- This driver only supports the deprecated OtherOS LPAR.
+ This driver only supports the deprecated OtherOS LPAR, select
+ PS3_VFLASH below for all other LPARs.
In general, all users will say Y or M.
As this driver needs a fixed buffer of 256 KiB of memory, it can
be disabled on the kernel command line using "ps3flash=off", to
not allocate this fixed buffer.
+config PS3_VFLASH
+ tristate "PS3 VFLASH Storage Driver"
+ depends on PPC_PS3 && BLOCK
+ select PS3_STORAGE
+ help
+ Include support for the PS3 virtual FLASH Storage.
+
+ This support is required to access the PS3 virtual FLASH ROM, which
+ contains the boot loader and some boot options.
+ This driver only supports LPARs other than the deprecated OtherOS,
+ select PS3_FLASH above to add support for FLASH ROM for the
+ OtherOS LPAR.
+
config PS3_VRAM
tristate "PS3 Video RAM Storage Driver"
depends on FB_PS3=y && BLOCK && m
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index 40528ba..8b02899 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_BLK_DEV_SWIM) += swim_mod.o
obj-$(CONFIG_BLK_DEV_FD) += floppy.o
obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o
obj-$(CONFIG_PS3_DISK) += ps3disk.o
+obj-$(CONFIG_PS3_VFLASH) += ps3vflash.o
obj-$(CONFIG_PS3_VRAM) += ps3vram.o
obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o
obj-$(CONFIG_AMIGA_Z2RAM) += z2ram.o
diff --git a/drivers/block/ps3vflash.c b/drivers/block/ps3vflash.c
new file mode 100644
index 0000000..a59e9f7
--- /dev/null
+++ b/drivers/block/ps3vflash.c
@@ -0,0 +1,508 @@
+/*
+ * PS3 VFLASH Storage Driver
+ *
+ * Copyright (C) 2011 Andre Heider <a.heider at gmail.com>
+ *
+ * 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 <asm/lv1call.h>
+#include <asm/ps3stor.h>
+#include <asm/firmware.h>
+
+
+#define DEVICE_NAME "ps3vflash"
+
+#define BOUNCE_SIZE (64*1024)
+
+#define PS3VFLASH_MAX_DISKS 16
+#define PS3VFLASH_MINORS 16
+
+
+#define PS3VFLASH_NAME "ps3v%c%c"
+
+
+static unsigned int region_flags[] = {
+ PS3_STORAGE_FLAG_SKIP_ACL | PS3_STORAGE_FLAG_ALT_KEY, /* raw vflash */
+ PS3_STORAGE_FLAG_SKIP_ACL, /* lpar 1 */
+ PS3_STORAGE_FLAG_ALT_KEY, /* dev_flash */
+ PS3_STORAGE_FLAG_ALT_KEY, /* dev_flash2 */
+ PS3_STORAGE_FLAG_ALT_KEY, /* dev_flash3 */
+ PS3_STORAGE_FLAG_DEFAULT, /* otheros */
+ PS3_STORAGE_FLAG_SKIP_ACL, /* unknown */
+ PS3_STORAGE_FLAG_DEFAULT, /* n/a */
+};
+module_param_array(region_flags, uint, NULL, S_IRUGO);
+MODULE_PARM_DESC(region_flags, "Region flags");
+
+struct ps3vflash_private {
+ spinlock_t lock; /* Request queue spinlock */
+ struct request_queue *queue;
+ unsigned int blocking_factor;
+ struct request *req;
+ unsigned int devidx;
+ struct gendisk *gendisk[0]; /* Must be last */
+};
+
+
+#define LV1_STORAGE_ATA_FLUSH_CACHE (0x31)
+
+static int ps3vflash_major;
+
+
+static const struct block_device_operations ps3vflash_fops = {
+ .owner = THIS_MODULE,
+};
+
+
+static void ps3vflash_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 segs %u sectors from %lu\n",
+ __func__, __LINE__, i, bio_segments(iter.bio),
+ bio_sectors(iter.bio), iter.bio->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 ps3vflash_submit_request_sg(struct ps3_storage_device *dev,
+ struct request *req)
+{
+ struct ps3vflash_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_idx = MINOR(disk_devt(req->rq_disk)) &
+ (PS3VFLASH_MINORS - 1);
+ unsigned int region_id = dev->regions[region_idx].id;
+ u64 flags = dev->regions[region_idx].flags;
+
+#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) {
+ ps3vflash_scatter_gather(dev, req, 1);
+
+ res = lv1_storage_write(dev->sbd.dev_id, region_id,
+ start_sector, sectors, flags,
+ dev->bounce_lpar, &dev->tag);
+ } else {
+ res = lv1_storage_read(dev->sbd.dev_id, region_id,
+ start_sector, sectors, flags,
+ 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 ps3vflash_submit_flush_request(struct ps3_storage_device *dev,
+ struct request *req)
+{
+ struct ps3vflash_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_FLUSH_CACHE,
+ 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 ps3vflash_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 (ps3vflash_submit_flush_request(dev, req))
+ break;
+ } else if (req->cmd_type == REQ_TYPE_FS) {
+ if (ps3vflash_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 ps3vflash_request(struct request_queue *q)
+{
+ struct ps3_storage_device *dev = q->queuedata;
+ struct ps3vflash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+
+ if (priv->req) {
+ dev_dbg(&dev->sbd.core, "%s:%u busy\n", __func__, __LINE__);
+ return;
+ }
+
+ ps3vflash_do_request(dev, q);
+}
+
+static irqreturn_t ps3vflash_interrupt(int irq, void *data)
+{
+ struct ps3_storage_device *dev = data;
+ struct ps3vflash_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)
+ ps3vflash_scatter_gather(dev, req, 0);
+ }
+
+ spin_lock(&priv->lock);
+ __blk_end_request_all(req, error);
+ priv->req = NULL;
+ ps3vflash_do_request(dev, priv->queue);
+ spin_unlock(&priv->lock);
+
+ return IRQ_HANDLED;
+}
+
+static unsigned long ps3vflash_mask;
+
+static DEFINE_MUTEX(ps3vflash_mask_mutex);
+
+static int __devinit ps3vflash_probe(struct ps3_system_bus_device *_dev)
+{
+ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
+ struct ps3vflash_private *priv;
+ int error;
+ unsigned int devidx;
+ struct request_queue *queue;
+ struct gendisk *gendisk;
+ u64 raw_capacity;
+ unsigned int region_idx;
+
+ 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(PS3VFLASH_MAX_DISKS > BITS_PER_LONG);
+ mutex_lock(&ps3vflash_mask_mutex);
+ devidx = find_first_zero_bit(&ps3vflash_mask, PS3VFLASH_MAX_DISKS);
+ if (devidx >= PS3VFLASH_MAX_DISKS) {
+ dev_err(&dev->sbd.core, "%s:%u: Too many disks\n", __func__,
+ __LINE__);
+ mutex_unlock(&ps3vflash_mask_mutex);
+ return -ENOSPC;
+ }
+ __set_bit(devidx, &ps3vflash_mask);
+ mutex_unlock(&ps3vflash_mask_mutex);
+
+ priv = kzalloc(sizeof(*priv) +
+ dev->num_regions * sizeof(struct gendisk),
+ 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;
+ }
+
+ for (region_idx = 0; region_idx < dev->num_regions; region_idx++)
+ dev->regions[region_idx].flags = region_flags[region_idx];
+
+ error = ps3stor_setup(dev, ps3vflash_interrupt);
+ if (error)
+ goto fail_free_bounce;
+
+ priv->devidx = devidx;
+
+ queue = blk_init_queue(ps3vflash_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);
+
+ if (test_bit(0, &dev->accessible_regions) == 0) {
+ raw_capacity = 0;
+ for (region_idx = 0; region_idx < dev->num_regions;
+ region_idx++)
+ if (test_bit(region_idx, &dev->accessible_regions))
+ raw_capacity += dev->regions[0].size;
+ } else {
+ raw_capacity = dev->regions[0].size;
+ }
+
+ dev_info(&dev->sbd.core, "%llu MiB\n", raw_capacity >> 11);
+
+ for (region_idx = 0; region_idx < dev->num_regions; region_idx++) {
+ if (test_bit(region_idx, &dev->accessible_regions) == 0)
+ continue;
+
+ gendisk = alloc_disk(PS3VFLASH_MINORS *
+ PS3_STORAGE_MAX_REGIONS);
+ if (!gendisk) {
+ dev_err(&dev->sbd.core, "%s:%u: alloc_disk failed\n",
+ __func__, __LINE__);
+ error = -ENOMEM;
+ goto fail_cleanup_queue;
+ }
+
+ priv->gendisk[region_idx] = gendisk;
+ gendisk->major = ps3vflash_major;
+ gendisk->first_minor = devidx * PS3VFLASH_MINORS + region_idx;
+ gendisk->fops = &ps3vflash_fops;
+ gendisk->queue = queue;
+ gendisk->private_data = dev;
+ gendisk->driverfs_dev = &dev->sbd.core;
+
+ snprintf(gendisk->disk_name, sizeof(gendisk->disk_name),
+ PS3VFLASH_NAME, '1' + devidx, 'a' + region_idx);
+
+ priv->blocking_factor = dev->blk_size >> 9;
+ set_capacity(gendisk, dev->regions[region_idx].size *
+ priv->blocking_factor);
+
+ dev_info(&dev->sbd.core,
+ "%s (%lu MiB region)\n",
+ gendisk->disk_name, get_capacity(gendisk) >> 11);
+
+ add_disk(gendisk);
+ }
+
+ return 0;
+
+fail_cleanup_queue:
+ for (region_idx = 0; region_idx < dev->num_regions; region_idx++)
+ if (priv->gendisk[region_idx])
+ del_gendisk(priv->gendisk[region_idx]);
+
+ 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(&ps3vflash_mask_mutex);
+ __clear_bit(devidx, &ps3vflash_mask);
+ mutex_unlock(&ps3vflash_mask_mutex);
+ return error;
+}
+
+static int ps3vflash_remove(struct ps3_system_bus_device *_dev)
+{
+ struct ps3_storage_device *dev = to_ps3_storage_device(&_dev->core);
+ struct ps3vflash_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+ unsigned int region_idx;
+
+ mutex_lock(&ps3vflash_mask_mutex);
+ __clear_bit(priv->devidx, &ps3vflash_mask);
+ mutex_unlock(&ps3vflash_mask_mutex);
+
+ for (region_idx = 0; region_idx < dev->num_regions; region_idx++) {
+ if (test_bit(region_idx, &dev->accessible_regions) == 0)
+ continue;
+
+ del_gendisk(priv->gendisk[region_idx]);
+ }
+
+ blk_cleanup_queue(priv->queue);
+
+ for (region_idx = 0; region_idx < dev->num_regions; region_idx++) {
+ if (test_bit(region_idx, &dev->accessible_regions) == 0)
+ continue;
+
+ put_disk(priv->gendisk[region_idx]);
+ }
+
+ ps3stor_teardown(dev);
+ kfree(dev->bounce_buf);
+ kfree(priv);
+ ps3_system_bus_set_drvdata(_dev, NULL);
+ return 0;
+}
+
+static struct ps3_system_bus_driver ps3vflash = {
+ .match_id = PS3_MATCH_ID_STOR_FLASH,
+ .core.name = DEVICE_NAME,
+ .core.owner = THIS_MODULE,
+ .probe = ps3vflash_probe,
+ .remove = ps3vflash_remove,
+ .shutdown = ps3vflash_remove,
+};
+
+
+static int __init ps3vflash_init(void)
+{
+ int error;
+
+ if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+ return -ENODEV;
+
+ if (ps3_get_ss_laid() == PS3_SS_LAID_OTHEROS)
+ 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;
+ }
+ ps3vflash_major = error;
+
+ pr_info("%s:%u: registered block device major %d\n", __func__,
+ __LINE__, ps3vflash_major);
+
+ error = ps3_system_bus_driver_register(&ps3vflash);
+ if (error)
+ unregister_blkdev(ps3vflash_major, DEVICE_NAME);
+
+ return error;
+}
+
+static void __exit ps3vflash_exit(void)
+{
+ ps3_system_bus_driver_unregister(&ps3vflash);
+ unregister_blkdev(ps3vflash_major, DEVICE_NAME);
+}
+
+module_init(ps3vflash_init);
+module_exit(ps3vflash_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PS3 VFLASH Storage Driver");
+MODULE_AUTHOR("Andre Heider");
+MODULE_ALIAS(PS3_MODULE_ALIAS_STOR_FLASH);
--
1.7.5.4
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