fsi: Remove old sbefifo driver

And remporarily disable build of fsi-occ

OpenBMC-Staging-Count: 1
Signed-off-by: Joel Stanley <joel@jms.id.au>

4 files changed, 3 insertions, 1104 deletions

diff --git a/drivers/fsi/Makefile b/drivers/fsi/Makefile
index 75fdc6d8cfc4..61e8e420c7ed 100644
--- a/drivers/fsi/Makefile
+++ b/drivers/fsi/Makefile
@@ -3,5 +3,5 @@ obj-$(CONFIG_FSI) += fsi-core.o
 obj-$(CONFIG_FSI_MASTER_HUB) += fsi-master-hub.o
 obj-$(CONFIG_FSI_MASTER_GPIO) += fsi-master-gpio.o
 obj-$(CONFIG_FSI_SCOM) += fsi-scom.o
-obj-$(CONFIG_FSI_SBEFIFO) += fsi-sbefifo.o
-obj-$(CONFIG_FSI_OCC) += fsi-occ.o
+#obj-$(CONFIG_FSI_SBEFIFO) += fsi-sbefifo.o
+#obj-$(CONFIG_FSI_OCC) += fsi-occ.o
diff --git a/drivers/fsi/fsi-sbefifo.c b/drivers/fsi/fsi-sbefifo.c
deleted file mode 100644
index cc9b9e36ac72..000000000000
--- a/drivers/fsi/fsi-sbefifo.c
+++ /dev/null
@@ -1,1071 +0,0 @@
-/*
- * Copyright (C) IBM Corporation 2017
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERGCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/fsi.h>
-#include <linux/fsi-sbefifo.h>
-#include <linux/idr.h>
-#include <linux/kernel.h>
-#include <linux/kref.h>
-#include <linux/list.h>
-#include <linux/miscdevice.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/poll.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/uaccess.h>
-#include <linux/wait.h>
-#include <linux/workqueue.h>
-
-#define CREATE_TRACE_POINTS
-#include <trace/events/sbefifo.h>
-
-/*
- * The SBEFIFO is a pipe-like FSI device for communicating with
- * the self boot engine on POWER processors.
- */
-
-#define DEVICE_NAME		"sbefifo"
-#define FSI_ENGID_SBE		0x22
-#define SBEFIFO_BUF_CNT		32
-
-#define SBEFIFO_UP		0x00	/* Up register offset */
-#define SBEFIFO_DWN		0x40	/* Down register offset */
-
-#define SBEFIFO_STS		0x04
-#define   SBEFIFO_EMPTY			BIT(20)
-#define   SBEFIFO_STS_RESET_REQ		BIT(25)
-#define SBEFIFO_EOT_RAISE	0x08
-#define   SBEFIFO_EOT_MAGIC		0xffffffff
-#define SBEFIFO_REQ_RESET	0x0C
-#define SBEFIFO_EOT_ACK		0x14
-
-#define SBEFIFO_RESCHEDULE	msecs_to_jiffies(500)
-#define SBEFIFO_MAX_RESCHDULE	msecs_to_jiffies(5000)
-
-struct sbefifo {
-	struct delayed_work work;
-	struct fsi_device *fsi_dev;
-	struct miscdevice mdev;
-	wait_queue_head_t wait;
-	struct list_head xfrs;
-	struct kref kref;
-	struct mutex list_lock;		/* lock access to the xfrs list */
-	struct mutex sbefifo_lock;	/* lock access to the hardware */
-	char name[32];
-	int idx;
-	int rc;
-};
-
-struct sbefifo_buf {
-	u32 buf[SBEFIFO_BUF_CNT];
-	unsigned long flags;
-#define SBEFIFO_BUF_FULL		1
-	u32 *rpos;
-	u32 *wpos;
-};
-
-struct sbefifo_xfr {
-	unsigned long wait_data_timeout;
-	struct sbefifo_buf *rbuf;
-	struct sbefifo_buf *wbuf;
-	struct list_head client;
-	struct list_head xfrs;
-	unsigned long flags;
-#define SBEFIFO_XFR_WRITE_DONE		1
-#define SBEFIFO_XFR_RESP_PENDING	2
-#define SBEFIFO_XFR_COMPLETE		3
-#define SBEFIFO_XFR_CANCEL		4
-};
-
-struct sbefifo_client {
-	struct sbefifo_buf rbuf;
-	struct sbefifo_buf wbuf;
-	struct list_head xfrs;
-	struct sbefifo *dev;
-	struct kref kref;
-	unsigned long f_flags;
-};
-
-static struct workqueue_struct *sbefifo_wq;
-
-static DEFINE_IDA(sbefifo_ida);
-
-static int sbefifo_inw(struct sbefifo *sbefifo, int reg, u32 *word)
-{
-	int rc;
-	__be32 raw_word;
-
-	rc = fsi_device_read(sbefifo->fsi_dev, reg, &raw_word,
-			     sizeof(raw_word));
-	if (rc)
-		return rc;
-
-	*word = be32_to_cpu(raw_word);
-
-	return 0;
-}
-
-static int sbefifo_outw(struct sbefifo *sbefifo, int reg, u32 word)
-{
-	__be32 raw_word = cpu_to_be32(word);
-
-	return fsi_device_write(sbefifo->fsi_dev, reg, &raw_word,
-				sizeof(raw_word));
-}
-
-/* Don't flip endianness of data to/from FIFO, just pass through. */
-static int sbefifo_readw(struct sbefifo *sbefifo, u32 *word)
-{
-	return fsi_device_read(sbefifo->fsi_dev, SBEFIFO_DWN, word,
-			       sizeof(*word));
-}
-
-static int sbefifo_writew(struct sbefifo *sbefifo, u32 word)
-{
-	return fsi_device_write(sbefifo->fsi_dev, SBEFIFO_UP, &word,
-				sizeof(word));
-}
-
-static int sbefifo_ack_eot(struct sbefifo *sbefifo)
-{
-	u32 discard;
-	int ret;
-
-	 /* Discard the EOT word. */
-	ret = sbefifo_readw(sbefifo, &discard);
-	if (ret)
-		return ret;
-
-	return sbefifo_outw(sbefifo, SBEFIFO_DWN | SBEFIFO_EOT_ACK,
-			    SBEFIFO_EOT_MAGIC);
-}
-
-static size_t sbefifo_dev_nwreadable(u32 sts)
-{
-	static const u32 FIFO_NTRY_CNT_MSK = 0x000f0000;
-	static const unsigned int FIFO_NTRY_CNT_SHIFT = 16;
-
-	return (sts & FIFO_NTRY_CNT_MSK) >> FIFO_NTRY_CNT_SHIFT;
-}
-
-static size_t sbefifo_dev_nwwriteable(u32 sts)
-{
-	static const size_t FIFO_DEPTH = 8;
-
-	return FIFO_DEPTH - sbefifo_dev_nwreadable(sts);
-}
-
-static void sbefifo_buf_init(struct sbefifo_buf *buf)
-{
-	WRITE_ONCE(buf->flags, 0);
-	WRITE_ONCE(buf->rpos, buf->buf);
-	WRITE_ONCE(buf->wpos, buf->buf);
-}
-
-static size_t sbefifo_buf_nbreadable(struct sbefifo_buf *buf)
-{
-	size_t n;
-	u32 *rpos = READ_ONCE(buf->rpos);
-	u32 *wpos = READ_ONCE(buf->wpos);
-
-	if (test_bit(SBEFIFO_BUF_FULL, &buf->flags))
-		n = SBEFIFO_BUF_CNT;
-	else if (rpos <= wpos)
-		n = wpos - rpos;
-	else
-		n = (buf->buf + SBEFIFO_BUF_CNT) - rpos;
-
-	return n << 2;
-}
-
-static size_t sbefifo_buf_nbwriteable(struct sbefifo_buf *buf)
-{
-	size_t n;
-	u32 *rpos = READ_ONCE(buf->rpos);
-	u32 *wpos = READ_ONCE(buf->wpos);
-
-	if (test_bit(SBEFIFO_BUF_FULL, &buf->flags))
-		n = 0;
-	else if (wpos < rpos)
-		n = rpos - wpos;
-	else
-		n = (buf->buf + SBEFIFO_BUF_CNT) - wpos;
-
-	return n << 2;
-}
-
-/*
- * Update pointers and flags after doing a buffer read.  Return true if the
- * buffer is now empty;
- */
-static bool sbefifo_buf_readnb(struct sbefifo_buf *buf, size_t n)
-{
-	u32 *rpos = READ_ONCE(buf->rpos);
-	u32 *wpos = READ_ONCE(buf->wpos);
-
-	if (n)
-		clear_bit(SBEFIFO_BUF_FULL, &buf->flags);
-
-	rpos += (n >> 2);
-	if (rpos == buf->buf + SBEFIFO_BUF_CNT)
-		rpos = buf->buf;
-
-	WRITE_ONCE(buf->rpos, rpos);
-
-	return rpos == wpos;
-}
-
-/*
- * Update pointers and flags after doing a buffer write.  Return true if the
- * buffer is now full.
- */
-static bool sbefifo_buf_wrotenb(struct sbefifo_buf *buf, size_t n)
-{
-	u32 *rpos = READ_ONCE(buf->rpos);
-	u32 *wpos = READ_ONCE(buf->wpos);
-
-	wpos += (n >> 2);
-	if (wpos == buf->buf + SBEFIFO_BUF_CNT)
-		wpos = buf->buf;
-	if (wpos == rpos)
-		set_bit(SBEFIFO_BUF_FULL, &buf->flags);
-
-	WRITE_ONCE(buf->wpos, wpos);
-
-	return rpos == wpos;
-}
-
-static void sbefifo_free(struct kref *kref)
-{
-	struct sbefifo *sbefifo = container_of(kref, struct sbefifo, kref);
-
-	kfree(sbefifo);
-}
-
-static void sbefifo_get(struct sbefifo *sbefifo)
-{
-	kref_get(&sbefifo->kref);
-}
-
-static void sbefifo_put(struct sbefifo *sbefifo)
-{
-	kref_put(&sbefifo->kref, sbefifo_free);
-}
-
-static struct sbefifo_xfr *sbefifo_enq_xfr(struct sbefifo_client *client)
-{
-	struct sbefifo *sbefifo = client->dev;
-	struct sbefifo_xfr *xfr;
-
-	if (READ_ONCE(sbefifo->rc))
-		return ERR_PTR(sbefifo->rc);
-
-	xfr = kzalloc(sizeof(*xfr), GFP_KERNEL);
-	if (!xfr)
-		return ERR_PTR(-ENOMEM);
-
-	trace_sbefifo_enq_xfer(client, xfr);
-
-	xfr->rbuf = &client->rbuf;
-	xfr->wbuf = &client->wbuf;
-	list_add_tail(&xfr->xfrs, &sbefifo->xfrs);
-	list_add_tail(&xfr->client, &client->xfrs);
-
-	return xfr;
-}
-
-static bool sbefifo_xfr_rsp_pending(struct sbefifo_client *client)
-{
-	struct sbefifo_xfr *xfr = list_first_entry_or_null(&client->xfrs,
-							   struct sbefifo_xfr,
-							   client);
-
-	if (xfr && test_bit(SBEFIFO_XFR_RESP_PENDING, &xfr->flags))
-		return true;
-
-	return false;
-}
-
-static struct sbefifo_client *sbefifo_new_client(struct sbefifo *sbefifo)
-{
-	struct sbefifo_client *client;
-
-	client = kzalloc(sizeof(*client), GFP_KERNEL);
-	if (!client)
-		return NULL;
-
-	trace_sbefifo_new_client(client);
-
-	kref_init(&client->kref);
-	client->dev = sbefifo;
-	sbefifo_buf_init(&client->rbuf);
-	sbefifo_buf_init(&client->wbuf);
-	INIT_LIST_HEAD(&client->xfrs);
-
-	sbefifo_get(sbefifo);
-
-	return client;
-}
-
-static void sbefifo_release_client(struct kref *kref)
-{
-	struct sbefifo *sbefifo;
-	struct sbefifo_client *client;
-	struct sbefifo_xfr *xfr, *tmp;
-
-	client = container_of(kref, struct sbefifo_client, kref);
-	sbefifo = client->dev;
-
-	if (!READ_ONCE(sbefifo->rc)) {
-		list_for_each_entry_safe(xfr, tmp, &client->xfrs, client) {
-			if (test_bit(SBEFIFO_XFR_COMPLETE, &xfr->flags)) {
-				list_del(&xfr->client);
-				kfree(xfr);
-				continue;
-			}
-
-			/*
-			 * The client left with pending or running xfrs.
-			 * Cancel them.
-			 */
-			set_bit(SBEFIFO_XFR_CANCEL, &xfr->flags);
-			sbefifo_get(sbefifo);
-			if (!queue_work(sbefifo_wq, &sbefifo->work.work))
-				sbefifo_put(sbefifo);
-		}
-	}
-
-	sbefifo_put(sbefifo);
-	trace_sbefifo_release_client(client);
-	kfree(client);
-}
-
-static void sbefifo_get_client(struct sbefifo_client *client)
-{
-	kref_get(&client->kref);
-}
-
-static void sbefifo_put_client(struct sbefifo_client *client)
-{
-	kref_put(&client->kref, sbefifo_release_client);
-}
-
-static struct sbefifo_xfr *sbefifo_next_xfr(struct sbefifo *sbefifo)
-{
-	struct sbefifo_xfr *xfr, *tmp;
-
-	list_for_each_entry_safe(xfr, tmp, &sbefifo->xfrs, xfrs) {
-		if (unlikely(test_bit(SBEFIFO_XFR_CANCEL, &xfr->flags))) {
-			/* Discard cancelled transfers. */
-			list_del(&xfr->xfrs);
-			kfree(xfr);
-			continue;
-		}
-
-		return xfr;
-	}
-
-	return NULL;
-}
-
-static void sbefifo_worker(struct work_struct *work)
-{
-	static const unsigned long EOT_MASK = 0x000000ff;
-	struct delayed_work *dwork = to_delayed_work(work);
-	struct sbefifo *sbefifo = container_of(dwork, struct sbefifo, work);
-	struct sbefifo_buf *rbuf, *wbuf;
-	struct sbefifo_xfr *xfr, *tmp;
-	struct sbefifo_buf drain;
-	size_t devn, bufn;
-	int eot = 0;
-	int ret = 0;
-	u32 sts;
-	int i;
-
-	mutex_lock(&sbefifo->list_lock);
-	xfr = list_first_entry_or_null(&sbefifo->xfrs, struct sbefifo_xfr,
-				       xfrs);
-	mutex_unlock(&sbefifo->list_lock);
-	if (!xfr)
-		return;
-
-	mutex_lock(&sbefifo->sbefifo_lock);
-
-	trace_sbefifo_begin_xfer(xfr);
-
-again:
-	rbuf = xfr->rbuf;
-	wbuf = xfr->wbuf;
-
-	if (unlikely(test_bit(SBEFIFO_XFR_CANCEL, &xfr->flags))) {
-		/* The client left. */
-		rbuf = &drain;
-		wbuf = &drain;
-		sbefifo_buf_init(&drain);
-		if (!test_bit(SBEFIFO_XFR_RESP_PENDING, &xfr->flags))
-			set_bit(SBEFIFO_XFR_WRITE_DONE, &xfr->flags);
-	}
-
-	 /* Drain the write buffer. */
-	while ((bufn = sbefifo_buf_nbreadable(wbuf))) {
-		ret = sbefifo_inw(sbefifo, SBEFIFO_UP | SBEFIFO_STS, &sts);
-		if (ret)
-			goto out;
-
-		devn = sbefifo_dev_nwwriteable(sts);
-		if (devn == 0) {
-			/* No open slot for write.  Reschedule. */
-			queue_delayed_work(sbefifo_wq, &sbefifo->work,
-					   SBEFIFO_RESCHEDULE);
-			goto out_unlock;
-		}
-
-		devn = min_t(size_t, devn, bufn >> 2);
-		for (i = 0; i < devn; i++) {
-			ret = sbefifo_writew(sbefifo, *wbuf->rpos);
-			if (ret)
-				goto out;
-
-			sbefifo_buf_readnb(wbuf, 1 << 2);
-		}
-	}
-
-	 /* Send EOT if the writer is finished. */
-	if (test_and_clear_bit(SBEFIFO_XFR_WRITE_DONE, &xfr->flags)) {
-		ret = sbefifo_outw(sbefifo, SBEFIFO_UP | SBEFIFO_EOT_RAISE,
-				   SBEFIFO_EOT_MAGIC);
-		if (ret)
-			goto out;
-
-		/* Inform reschedules that the writer is finished. */
-		set_bit(SBEFIFO_XFR_RESP_PENDING, &xfr->flags);
-	}
-
-	/* Nothing left to do if the writer is not finished. */
-	if (!test_bit(SBEFIFO_XFR_RESP_PENDING, &xfr->flags))
-		goto out;
-
-	 /* Fill the read buffer. */
-	while ((bufn = sbefifo_buf_nbwriteable(rbuf))) {
-		ret = sbefifo_inw(sbefifo, SBEFIFO_DWN | SBEFIFO_STS, &sts);
-		if (ret)
-			goto out;
-
-		devn = sbefifo_dev_nwreadable(sts);
-		if (devn == 0) {
-			/*
-			 * Limit the maximum waiting period for data in the
-			 * FIFO. If the SBE isn't running, we will wait
-			 * forever.
-			 */
-			if (!xfr->wait_data_timeout) {
-				xfr->wait_data_timeout =
-					jiffies + SBEFIFO_MAX_RESCHDULE;
-			} else if (time_after(jiffies,
-					      xfr->wait_data_timeout)) {
-				ret = -ETIME;
-				goto out;
-			}
-
-			/* No data yet.  Reschedule. */
-			queue_delayed_work(sbefifo_wq, &sbefifo->work,
-					   SBEFIFO_RESCHEDULE);
-			goto out_unlock;
-		} else {
-			xfr->wait_data_timeout = 0;
-		}
-
-		/* Fill.  The EOT word is discarded.  */
-		devn = min_t(size_t, devn, bufn >> 2);
-		eot = (sts & EOT_MASK) != 0;
-		if (eot)
-			devn--;
-
-		for (i = 0; i < devn; i++) {
-			ret = sbefifo_readw(sbefifo, rbuf->wpos);
-			if (ret)
-				goto out;
-
-			if (likely(!test_bit(SBEFIFO_XFR_CANCEL, &xfr->flags)))
-				sbefifo_buf_wrotenb(rbuf, 1 << 2);
-		}
-
-		if (eot) {
-			ret = sbefifo_ack_eot(sbefifo);
-			if (ret)
-				goto out;
-
-			set_bit(SBEFIFO_XFR_COMPLETE, &xfr->flags);
-
-			mutex_lock(&sbefifo->list_lock);
-			list_del(&xfr->xfrs);
-			mutex_unlock(&sbefifo->list_lock);
-
-			if (unlikely(test_bit(SBEFIFO_XFR_CANCEL,
-					      &xfr->flags)))
-				kfree(xfr);
-			break;
-		}
-	}
-
-out:
-	trace_sbefifo_end_xfer(xfr, ret);
-
-	if (unlikely(ret)) {
-		sbefifo->rc = ret;
-		dev_err(&sbefifo->fsi_dev->dev,
-			"Fatal bus access failure: %d\n", ret);
-
-		mutex_lock(&sbefifo->list_lock);
-		list_for_each_entry_safe(xfr, tmp, &sbefifo->xfrs, xfrs) {
-			list_del(&xfr->xfrs);
-			kfree(xfr);
-		}
-		INIT_LIST_HEAD(&sbefifo->xfrs);
-		mutex_unlock(&sbefifo->list_lock);
-	} else if (eot) {
-		mutex_lock(&sbefifo->list_lock);
-		xfr = sbefifo_next_xfr(sbefifo);
-		mutex_unlock(&sbefifo->list_lock);
-
-		if (xfr) {
-			wake_up_interruptible(&sbefifo->wait);
-			goto again;
-		}
-	}
-
-	sbefifo_put(sbefifo);
-	wake_up_interruptible(&sbefifo->wait);
-
-out_unlock:
-	mutex_unlock(&sbefifo->sbefifo_lock);
-}
-
-static int sbefifo_open(struct inode *inode, struct file *file)
-{
-	struct sbefifo *sbefifo = container_of(file->private_data,
-					       struct sbefifo, mdev);
-	struct sbefifo_client *client;
-	int ret;
-
-	ret = READ_ONCE(sbefifo->rc);
-	if (ret)
-		return ret;
-
-	client = sbefifo_new_client(sbefifo);
-	if (!client)
-		return -ENOMEM;
-
-	file->private_data = client;
-	client->f_flags = file->f_flags;
-
-	return 0;
-}
-
-static unsigned int sbefifo_poll(struct file *file, poll_table *wait)
-{
-	struct sbefifo_client *client = file->private_data;
-	struct sbefifo *sbefifo = client->dev;
-	unsigned int mask = 0;
-
-	poll_wait(file, &sbefifo->wait, wait);
-
-	if (READ_ONCE(sbefifo->rc))
-		mask |= POLLERR;
-
-	if (sbefifo_buf_nbreadable(&client->rbuf))
-		mask |= POLLIN;
-
-	if (sbefifo_buf_nbwriteable(&client->wbuf))
-		mask |= POLLOUT;
-
-	return mask;
-}
-
-static bool sbefifo_read_ready(struct sbefifo *sbefifo,
-			       struct sbefifo_client *client, size_t *n,
-			       size_t *ret)
-{
-	struct sbefifo_xfr *xfr = list_first_entry_or_null(&client->xfrs,
-							   struct sbefifo_xfr,
-							   client);
-
-	*n = sbefifo_buf_nbreadable(&client->rbuf);
-	*ret = READ_ONCE(sbefifo->rc);
-
-	return *ret || *n ||
-		(xfr && test_bit(SBEFIFO_XFR_COMPLETE, &xfr->flags));
-}
-
-static ssize_t sbefifo_read_common(struct sbefifo_client *client,
-				   char __user *ubuf, char *kbuf, size_t len)
-{
-	struct sbefifo *sbefifo = client->dev;
-	struct sbefifo_xfr *xfr;
-	size_t n;
-	ssize_t ret = 0;
-
-	if ((len >> 2) << 2 != len)
-		return -EINVAL;
-
-	if ((client->f_flags & O_NONBLOCK) && !sbefifo_xfr_rsp_pending(client))
-		return -EAGAIN;
-
-	sbefifo_get_client(client);
-	if (wait_event_interruptible(sbefifo->wait,
-				     sbefifo_read_ready(sbefifo, client, &n,
-							&ret))) {
-		ret = -ERESTARTSYS;
-		goto out;
-	}
-
-	if (ret) {
-		INIT_LIST_HEAD(&client->xfrs);
-		goto out;
-	}
-
-	trace_sbefifo_deq_xfer(client, list_first_entry_or_null(&client->xfrs,
-							   struct sbefifo_xfr,
-							   client));
-
-	n = min_t(size_t, n, len);
-
-	if (ubuf) {
-		if (copy_to_user(ubuf, READ_ONCE(client->rbuf.rpos), n)) {
-			ret = -EFAULT;
-			goto out;
-		}
-	} else {
-		memcpy(kbuf, READ_ONCE(client->rbuf.rpos), n);
-	}
-
-	if (sbefifo_buf_readnb(&client->rbuf, n)) {
-		xfr = list_first_entry_or_null(&client->xfrs,
-					       struct sbefifo_xfr, client);
-		if (!xfr) {
-			/* should be impossible to not have an xfr here */
-			WARN_ONCE(1, "no xfr in queue");
-			ret = -EPROTO;
-			goto out;
-		}
-
-		if (!test_bit(SBEFIFO_XFR_COMPLETE, &xfr->flags)) {
-			/* Fill the read buffer back up. */
-			sbefifo_get(sbefifo);
-			if (!queue_work(sbefifo_wq, &sbefifo->work.work))
-				sbefifo_put(sbefifo);
-		} else {
-			list_del(&xfr->client);
-			kfree(xfr);
-			wake_up_interruptible(&sbefifo->wait);
-		}
-	}
-
-	ret = n;
-
-out:
-	sbefifo_put_client(client);
-	return ret;
-}
-
-static ssize_t sbefifo_read(struct file *file, char __user *buf, size_t len,
-			    loff_t *offset)
-{
-	struct sbefifo_client *client = file->private_data;
-
-	return sbefifo_read_common(client, buf, NULL, len);
-}
-
-static bool sbefifo_write_ready(struct sbefifo *sbefifo,
-				struct sbefifo_xfr *xfr,
-				struct sbefifo_client *client, size_t *n)
-{
-	struct sbefifo_xfr *next = list_first_entry_or_null(&client->xfrs,
-							    struct sbefifo_xfr,
-							    client);
-
-	*n = sbefifo_buf_nbwriteable(&client->wbuf);
-	return READ_ONCE(sbefifo->rc) || (next == xfr && *n);
-}
-
-static ssize_t sbefifo_write_common(struct sbefifo_client *client,
-				    const char __user *ubuf, const char *kbuf,
-				    size_t len)
-{
-	struct sbefifo *sbefifo = client->dev;
-	struct sbefifo_xfr *xfr;
-	ssize_t ret = 0;
-	size_t n;
-
-	if ((len >> 2) << 2 != len)
-		return -EINVAL;
-
-	if (!len)
-		return 0;
-
-	sbefifo_get_client(client);
-	n = sbefifo_buf_nbwriteable(&client->wbuf);
-
-	mutex_lock(&sbefifo->list_lock);
- 
-	/* next xfr to be executed */
-	xfr = list_first_entry_or_null(&sbefifo->xfrs, struct sbefifo_xfr,
-				       xfrs);
-
-	if ((client->f_flags & O_NONBLOCK) && xfr && n < len) {
-		mutex_unlock(&sbefifo->list_lock);
-		ret = -EAGAIN;
-		goto out;
-	}
-
-	xfr = sbefifo_enq_xfr(client);		/* this xfr queued up */
-	if (IS_ERR(xfr)) {
-		mutex_unlock(&sbefifo->list_lock);
-		ret = PTR_ERR(xfr);
-		goto out;
-	}
-
-	mutex_unlock(&sbefifo->list_lock);
-
-	/*
-	 * Partial writes are not really allowed in that EOT is sent exactly
-	 * once per write.
-	 */
-	while (len) {
-		if (wait_event_interruptible(sbefifo->wait,
-					     sbefifo_write_ready(sbefifo, xfr,
-								 client,
-								 &n))) {
-			set_bit(SBEFIFO_XFR_CANCEL, &xfr->flags);
-			sbefifo_get(sbefifo);
-			if (!queue_work(sbefifo_wq, &sbefifo->work.work))
-				sbefifo_put(sbefifo);
-
-			ret = -ERESTARTSYS;
-			goto out;
-		}
-
-		if (sbefifo->rc) {
-			INIT_LIST_HEAD(&client->xfrs);
-			ret = sbefifo->rc;
-			goto out;
-		}
-
-		n = min_t(size_t, n, len);
-
-		if (ubuf) {
-			if (copy_from_user(READ_ONCE(client->wbuf.wpos), ubuf,
-			    n)) {
-				set_bit(SBEFIFO_XFR_CANCEL, &xfr->flags);
-				sbefifo_get(sbefifo);
-				if (!queue_work(sbefifo_wq,
-						&sbefifo->work.work))
-					sbefifo_put(sbefifo);
-				ret = -EFAULT;
-				goto out;
-			}
-
-			ubuf += n;
-		} else {
-			memcpy(READ_ONCE(client->wbuf.wpos), kbuf, n);
-			kbuf += n;
-		}
-
-		sbefifo_buf_wrotenb(&client->wbuf, n);
-		len -= n;
-		ret += n;
-
-		/*
-		 * Set this before starting timer to avoid race condition on
-		 * this flag with the timer function writer.
-		 */
-		if (!len)
-			set_bit(SBEFIFO_XFR_WRITE_DONE, &xfr->flags);
-
-		/* Drain the write buffer. */
-		sbefifo_get(sbefifo);
-		if (!queue_work(sbefifo_wq, &sbefifo->work.work))
-			sbefifo_put(sbefifo);
-	}
-
-out:
-	sbefifo_put_client(client);
-	return ret;
-}
-
-static ssize_t sbefifo_write(struct file *file, const char __user *buf,
-			     size_t len, loff_t *offset)
-{
-	struct sbefifo_client *client = file->private_data;
-
-	return sbefifo_write_common(client, buf, NULL, len);
-}
-
-static int sbefifo_release(struct inode *inode, struct file *file)
-{
-	struct sbefifo_client *client = file->private_data;
-	struct sbefifo *sbefifo = client->dev;
-
-	sbefifo_put_client(client);
-
-	return READ_ONCE(sbefifo->rc);
-}
-
-static const struct file_operations sbefifo_fops = {
-	.owner		= THIS_MODULE,
-	.open		= sbefifo_open,
-	.read		= sbefifo_read,
-	.write		= sbefifo_write,
-	.poll		= sbefifo_poll,
-	.release	= sbefifo_release,
-};
-
-struct sbefifo_client *sbefifo_drv_open(struct device *dev,
-					unsigned long flags)
-{
-	struct sbefifo_client *client;
-	struct sbefifo *sbefifo = dev_get_drvdata(dev);
-
-	if (!sbefifo)
-		return NULL;
-
-	client = sbefifo_new_client(sbefifo);
-	if (client)
-		client->f_flags = flags;
-
-	return client;
-}
-EXPORT_SYMBOL_GPL(sbefifo_drv_open);
-
-int sbefifo_drv_read(struct sbefifo_client *client, char *buf, size_t len)
-{
-	return sbefifo_read_common(client, NULL, buf, len);
-}
-EXPORT_SYMBOL_GPL(sbefifo_drv_read);
-
-int sbefifo_drv_write(struct sbefifo_client *client, const char *buf,
-		      size_t len)
-{
-	return sbefifo_write_common(client, NULL, buf, len);
-}
-EXPORT_SYMBOL_GPL(sbefifo_drv_write);
-
-void sbefifo_drv_release(struct sbefifo_client *client)
-{
-	if (!client)
-		return;
-
-	sbefifo_put_client(client);
-}
-EXPORT_SYMBOL_GPL(sbefifo_drv_release);
-
-static int sbefifo_unregister_child(struct device *dev, void *data)
-{
-	struct platform_device *child = to_platform_device(dev);
-
-	of_device_unregister(child);
-	if (dev->of_node)
-		of_node_clear_flag(dev->of_node, OF_POPULATED);
-
-	return 0;
-}
-
-static int sbefifo_request_reset(struct sbefifo *sbefifo)
-{
-	int ret;
-	u32 status;
-	unsigned long start;
-	const unsigned int wait_time = 5;	/* jiffies */
-	const unsigned long timeout = msecs_to_jiffies(250);
-
-	ret = sbefifo_outw(sbefifo, SBEFIFO_UP | SBEFIFO_REQ_RESET, 1);
-	if (ret)
-		return ret;
-
-	start = jiffies;
-
-	do {
-		ret = sbefifo_inw(sbefifo, SBEFIFO_UP | SBEFIFO_STS, &status);
-		if (ret)
-			return ret;
-
-		if (!(status & SBEFIFO_STS_RESET_REQ))
-			return 0;
-
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (schedule_timeout(wait_time) > 0)
-			return -EINTR;
-	} while (time_after(start + timeout, jiffies));
-
-	return -ETIME;
-}
-
-static int sbefifo_probe(struct device *dev)
-{
-	struct fsi_device *fsi_dev = to_fsi_dev(dev);
-	struct sbefifo *sbefifo;
-	struct device_node *np;
-	struct platform_device *child;
-	char child_name[32];
-	u32 up, down;
-	int ret, child_idx = 0;
-
-	dev_dbg(dev, "Found sbefifo device\n");
-	sbefifo = kzalloc(sizeof(*sbefifo), GFP_KERNEL);
-	if (!sbefifo)
-		return -ENOMEM;
-
-	sbefifo->fsi_dev = fsi_dev;
-
-	ret = sbefifo_inw(sbefifo, SBEFIFO_UP | SBEFIFO_STS, &up);
-	if (ret)
-		return ret;
-
-	ret = sbefifo_inw(sbefifo, SBEFIFO_DWN | SBEFIFO_STS, &down);
-	if (ret)
-		return ret;
-
-	if (!(up & SBEFIFO_EMPTY) || !(down & SBEFIFO_EMPTY)) {
-		ret = sbefifo_request_reset(sbefifo);
-		if (ret) {
-			dev_err(dev,
-				"fifos weren't empty and failed the reset\n");
-			return ret;
-		}
-	}
-
-	mutex_init(&sbefifo->list_lock);
-	mutex_init(&sbefifo->sbefifo_lock);
-	kref_init(&sbefifo->kref);
-	init_waitqueue_head(&sbefifo->wait);
-	INIT_LIST_HEAD(&sbefifo->xfrs);
-
-	sbefifo->idx = ida_simple_get(&sbefifo_ida, 1, INT_MAX, GFP_KERNEL);
-	snprintf(sbefifo->name, sizeof(sbefifo->name), "sbefifo%d",
-		 sbefifo->idx);
-
-	/* This bit of silicon doesn't offer any interrupts... */
-	INIT_DELAYED_WORK(&sbefifo->work, sbefifo_worker);
-
-	sbefifo->mdev.minor = MISC_DYNAMIC_MINOR;
-	sbefifo->mdev.fops = &sbefifo_fops;
-	sbefifo->mdev.name = sbefifo->name;
-	sbefifo->mdev.parent = dev;
-	ret = misc_register(&sbefifo->mdev);
-	if (ret) {
-		dev_err(dev, "failed to register miscdevice: %d\n", ret);
-		ida_simple_remove(&sbefifo_ida, sbefifo->idx);
-		sbefifo_put(sbefifo);
-		return ret;
-	}
-
-	/* create platform devs for dts child nodes (occ, etc) */
-	for_each_available_child_of_node(dev->of_node, np) {
-		snprintf(child_name, sizeof(child_name), "%s-dev%d",
-			 sbefifo->name, child_idx++);
-		child = of_platform_device_create(np, child_name, dev);
-		if (!child)
-			dev_warn(dev, "failed to create child %s dev\n",
-				 child_name);
-	}
-
-	dev_set_drvdata(dev, sbefifo);
-
-	return 0;
-}
-
-static int sbefifo_remove(struct device *dev)
-{
-	struct sbefifo *sbefifo = dev_get_drvdata(dev);
-	struct sbefifo_xfr *xfr, *tmp;
-
-	/* lock the sbefifo so to prevent deleting an ongoing xfr */
-	mutex_lock(&sbefifo->sbefifo_lock);
-	mutex_lock(&sbefifo->list_lock);
-
-	WRITE_ONCE(sbefifo->rc, -ENODEV);
-	list_for_each_entry_safe(xfr, tmp, &sbefifo->xfrs, xfrs) {
-		list_del(&xfr->xfrs);
-		kfree(xfr);
-	}
-
-	INIT_LIST_HEAD(&sbefifo->xfrs);
-
-	mutex_unlock(&sbefifo->list_lock);
-	mutex_unlock(&sbefifo->sbefifo_lock);
-
-	wake_up_all(&sbefifo->wait);
-
-	misc_deregister(&sbefifo->mdev);
-	device_for_each_child(dev, NULL, sbefifo_unregister_child);
-
-	ida_simple_remove(&sbefifo_ida, sbefifo->idx);
-
-	if (cancel_delayed_work_sync(&sbefifo->work))
-		sbefifo_put(sbefifo);
-
-	sbefifo_put(sbefifo);
-
-	return 0;
-}
-
-static struct fsi_device_id sbefifo_ids[] = {
-	{
-		.engine_type = FSI_ENGID_SBE,
-		.version = FSI_VERSION_ANY,
-	},
-	{ 0 }
-};
-
-static struct fsi_driver sbefifo_drv = {
-	.id_table = sbefifo_ids,
-	.drv = {
-		.name = DEVICE_NAME,
-		.bus = &fsi_bus_type,
-		.probe = sbefifo_probe,
-		.remove = sbefifo_remove,
-	}
-};
-
-static int sbefifo_init(void)
-{
-	sbefifo_wq = create_singlethread_workqueue("sbefifo");
-	if (!sbefifo_wq)
-		return -ENOMEM;
-
-	return fsi_driver_register(&sbefifo_drv);
-}
-
-static void sbefifo_exit(void)
-{
-	destroy_workqueue(sbefifo_wq);
-
-	fsi_driver_unregister(&sbefifo_drv);
-
-	ida_destroy(&sbefifo_ida);
-}
-
-module_init(sbefifo_init);
-module_exit(sbefifo_exit);
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Brad Bishop <bradleyb@fuzziesquirrel.com>");
-MODULE_AUTHOR("Eddie James <eajames@linux.vnet.ibm.com>");
-MODULE_DESCRIPTION("Linux device interface to the POWER Self Boot Engine");
diff --git a/drivers/hwmon/occ/Makefile b/drivers/hwmon/occ/Makefile
index ab5c3e965ccb..ca6d25ae9da8 100644
--- a/drivers/hwmon/occ/Makefile
+++ b/drivers/hwmon/occ/Makefile
@@ -1,7 +1,7 @@
 occ-hwmon-objs := common.o
 
 ifeq ($(CONFIG_SENSORS_OCC_P9_SBE), y)
-occ-hwmon-objs += p9_sbe.o
+#occ-hwmon-objs += p9_sbe.o
 endif
 
 ifeq ($(CONFIG_SENSORS_OCC_P8_I2C), y)
diff --git a/include/linux/fsi-sbefifo.h b/include/linux/fsi-sbefifo.h
deleted file mode 100644
index 8e55891963a5..000000000000
--- a/include/linux/fsi-sbefifo.h
+++ /dev/null
@@ -1,30 +0,0 @@
-/*
- * SBEFIFO FSI Client device driver
- *
- * Copyright (C) IBM Corporation 2017
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERGCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef LINUX_FSI_SBEFIFO_H
-#define LINUX_FSI_SBEFIFO_H
-
-struct device;
-struct sbefifo_client;
-
-extern struct sbefifo_client *sbefifo_drv_open(struct device *dev,
-					       unsigned long flags);
-extern int sbefifo_drv_read(struct sbefifo_client *client, char *buf,
-			    size_t len);
-extern int sbefifo_drv_write(struct sbefifo_client *client, const char *buf,
-			     size_t len);
-extern void sbefifo_drv_release(struct sbefifo_client *client);
-
-#endif /* LINUX_FSI_SBEFIFO_H */