Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 560 insertions, 0 deletions

diff --git a/drivers/block/ps3disk.c b/drivers/block/ps3disk.c
new file mode 100644
index 000000000..700dd0552
--- /dev/null
+++ b/drivers/block/ps3disk.c
@@ -0,0 +1,560 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PS3 Disk Storage Driver
+ *
+ * Copyright (C) 2007 Sony Computer Entertainment Inc.
+ * Copyright 2007 Sony Corp.
+ */
+
+#include <linux/ata.h>
+#include <linux/blk-mq.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 blk_mq_tag_set tag_set;
+	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;
+
+	rq_for_each_segment(bvec, req, iter) {
+		dev_dbg(&dev->sbd.core, "%s:%u: %u sectors from %llu\n",
+			__func__, __LINE__, bio_sectors(iter.bio),
+			iter.bio->bi_iter.bi_sector);
+		if (gather)
+			memcpy_from_bvec(dev->bounce_buf + offset, &bvec);
+		else
+			memcpy_to_bvec(&bvec, dev->bounce_buf + offset);
+		offset += bvec.bv_len;
+	}
+}
+
+static blk_status_t 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);
+		return BLK_STS_IOERR;
+	}
+
+	priv->req = req;
+	return BLK_STS_OK;
+}
+
+static blk_status_t 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);
+		return BLK_STS_IOERR;
+	}
+
+	priv->req = req;
+	return BLK_STS_OK;
+}
+
+static blk_status_t ps3disk_do_request(struct ps3_storage_device *dev,
+				       struct request *req)
+{
+	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
+
+	switch (req_op(req)) {
+	case REQ_OP_FLUSH:
+		return ps3disk_submit_flush_request(dev, req);
+	case REQ_OP_READ:
+	case REQ_OP_WRITE:
+		return ps3disk_submit_request_sg(dev, req);
+	default:
+		blk_dump_rq_flags(req, DEVICE_NAME " bad request");
+		return BLK_STS_IOERR;
+	}
+}
+
+static blk_status_t ps3disk_queue_rq(struct blk_mq_hw_ctx *hctx,
+				     const struct blk_mq_queue_data *bd)
+{
+	struct request_queue *q = hctx->queue;
+	struct ps3_storage_device *dev = q->queuedata;
+	struct ps3disk_private *priv = ps3_system_bus_get_drvdata(&dev->sbd);
+	blk_status_t ret;
+
+	blk_mq_start_request(bd->rq);
+
+	spin_lock_irq(&priv->lock);
+	ret = ps3disk_do_request(dev, bd->rq);
+	spin_unlock_irq(&priv->lock);
+
+	return ret;
+}
+
+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;
+	blk_status_t 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_op(req) == REQ_OP_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 = BLK_STS_IOERR;
+	} 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);
+	priv->req = NULL;
+	blk_mq_end_request(req, error);
+	spin_unlock(&priv->lock);
+
+	blk_mq_run_hw_queues(priv->gendisk->queue, true);
+	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 const struct blk_mq_ops ps3disk_mq_ops = {
+	.queue_rq	= ps3disk_queue_rq,
+};
+
+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 queue_limits lim = {
+		.logical_block_size	= dev->blk_size,
+		.max_hw_sectors		= BOUNCE_SIZE >> 9,
+		.max_segments		= -1,
+		.max_segment_size	= BOUNCE_SIZE,
+		.dma_alignment		= dev->blk_size - 1,
+		.features		= BLK_FEAT_WRITE_CACHE |
+					  BLK_FEAT_ROTATIONAL,
+	};
+	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_obj(*priv);
+	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);
+
+	error = blk_mq_alloc_sq_tag_set(&priv->tag_set, &ps3disk_mq_ops, 1, 0);
+	if (error)
+		goto fail_teardown;
+
+	gendisk = blk_mq_alloc_disk(&priv->tag_set, &lim, dev);
+	if (IS_ERR(gendisk)) {
+		dev_err(&dev->sbd.core, "%s:%u: blk_mq_alloc_disk failed\n",
+			__func__, __LINE__);
+		error = PTR_ERR(gendisk);
+		goto fail_free_tag_set;
+	}
+
+	priv->gendisk = gendisk;
+	gendisk->major = ps3disk_major;
+	gendisk->first_minor = devidx * PS3DISK_MINORS;
+	gendisk->minors = PS3DISK_MINORS;
+	gendisk->fops = &ps3disk_fops;
+	gendisk->private_data = dev;
+	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, %llu MiB for OtherOS)\n",
+		 gendisk->disk_name, priv->model, priv->raw_capacity >> 11,
+		 get_capacity(gendisk) >> 11);
+
+	error = device_add_disk(&dev->sbd.core, gendisk, NULL);
+	if (error)
+		goto fail_cleanup_disk;
+
+	return 0;
+fail_cleanup_disk:
+	put_disk(gendisk);
+fail_free_tag_set:
+	blk_mq_free_tag_set(&priv->tag_set);
+fail_teardown:
+	ps3stor_teardown(dev);
+fail_free_bounce:
+	kfree(dev->bounce_buf);
+fail_free_priv:
+	kfree(priv);
+	ps3_system_bus_set_drvdata(_dev, NULL);
+fail:
+	mutex_lock(&ps3disk_mask_mutex);
+	__clear_bit(devidx, &ps3disk_mask);
+	mutex_unlock(&ps3disk_mask_mutex);
+	return error;
+}
+
+static void 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);
+	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);