char: remove the SGI tiocx/mbcs driver

The SGI SN2 support is about to be removed.  Remove this driver that
depends on the SN2 support.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lkml.kernel.org/r/20190813072514.23299-3-hch@lst.de
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 0 insertions, 570 deletions

diff --git a/arch/ia64/sn/kernel/Makefile b/arch/ia64/sn/kernel/Makefile
index 9c349dd23265..2f580603370d 100644
--- a/arch/ia64/sn/kernel/Makefile
+++ b/arch/ia64/sn/kernel/Makefile
@@ -14,5 +14,4 @@ obj-y				+= setup.o bte.o bte_error.o irq.o mca.o idle.o \
 				   io_init.o iomv.o klconflib.o pio_phys.o \
 				   sn2/
 obj-$(CONFIG_IA64_GENERIC)      += machvec.o
-obj-$(CONFIG_SGI_TIOCX)		+= tiocx.o
 obj-$(CONFIG_PCI_MSI)		+= msi_sn.o
diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
deleted file mode 100644
index 32d0380eb72e..000000000000
--- a/arch/ia64/sn/kernel/tiocx.c
+++ /dev/null
@@ -1,569 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (c) 2005 Silicon Graphics, Inc.  All rights reserved.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/proc_fs.h>
-#include <linux/capability.h>
-#include <linux/device.h>
-#include <linux/delay.h>
-#include <linux/uaccess.h>
-#include <asm/sn/sn_sal.h>
-#include <asm/sn/addrs.h>
-#include <asm/sn/io.h>
-#include <asm/sn/types.h>
-#include <asm/sn/shubio.h>
-#include <asm/sn/tiocx.h>
-#include <asm/sn/l1.h>
-#include <asm/sn/module.h>
-#include "tio.h"
-#include "xtalk/xwidgetdev.h"
-#include "xtalk/hubdev.h"
-
-#define CX_DEV_NONE 0
-#define DEVICE_NAME "tiocx"
-#define WIDGET_ID 0
-#define TIOCX_DEBUG 0
-
-#if TIOCX_DEBUG
-#define DBG(fmt...)    printk(KERN_ALERT fmt)
-#else
-#define DBG(fmt...)
-#endif
-
-struct device_attribute dev_attr_cxdev_control;
-
-/**
- * tiocx_match - Try to match driver id list with device.
- * @dev: device pointer
- * @drv: driver pointer
- *
- * Returns 1 if match, 0 otherwise.
- */
-static int tiocx_match(struct device *dev, struct device_driver *drv)
-{
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-	struct cx_drv *cx_drv = to_cx_driver(drv);
-	const struct cx_device_id *ids = cx_drv->id_table;
-
-	if (!ids)
-		return 0;
-
-	while (ids->part_num) {
-		if (ids->part_num == cx_dev->cx_id.part_num)
-			return 1;
-		ids++;
-	}
-	return 0;
-
-}
-
-static int tiocx_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
-	return -ENODEV;
-}
-
-static void tiocx_bus_release(struct device *dev)
-{
-	kfree(to_cx_dev(dev));
-}
-
-/**
- * cx_device_match - Find cx_device in the id table.
- * @ids: id table from driver
- * @cx_device: part/mfg id for the device
- *
- */
-static const struct cx_device_id *cx_device_match(const struct cx_device_id
-						  *ids,
-						  struct cx_dev *cx_device)
-{
-	/*
-	 * NOTES: We may want to check for CX_ANY_ID too.
-	 *        Do we want to match against nasid too?
-	 *        CX_DEV_NONE == 0, if the driver tries to register for
-	 *        part/mfg == 0 we should return no-match (NULL) here.
-	 */
-	while (ids->part_num && ids->mfg_num) {
-		if (ids->part_num == cx_device->cx_id.part_num &&
-		    ids->mfg_num == cx_device->cx_id.mfg_num)
-			return ids;
-		ids++;
-	}
-
-	return NULL;
-}
-
-/**
- * cx_device_probe - Look for matching device.
- *			Call driver probe routine if found.
- * @cx_driver: driver table (cx_drv struct) from driver
- * @cx_device: part/mfg id for the device
- */
-static int cx_device_probe(struct device *dev)
-{
-	const struct cx_device_id *id;
-	struct cx_drv *cx_drv = to_cx_driver(dev->driver);
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-	int error = 0;
-
-	if (!cx_dev->driver && cx_drv->probe) {
-		id = cx_device_match(cx_drv->id_table, cx_dev);
-		if (id) {
-			if ((error = cx_drv->probe(cx_dev, id)) < 0)
-				return error;
-			else
-				cx_dev->driver = cx_drv;
-		}
-	}
-
-	return error;
-}
-
-/**
- * cx_driver_remove - Remove driver from device struct.
- * @dev: device
- */
-static int cx_driver_remove(struct device *dev)
-{
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-	struct cx_drv *cx_drv = cx_dev->driver;
-	if (cx_drv->remove)
-		cx_drv->remove(cx_dev);
-	cx_dev->driver = NULL;
-	return 0;
-}
-
-struct bus_type tiocx_bus_type = {
-	.name = "tiocx",
-	.match = tiocx_match,
-	.uevent = tiocx_uevent,
-	.probe = cx_device_probe,
-	.remove = cx_driver_remove,
-};
-
-/**
- * cx_driver_register - Register the driver.
- * @cx_driver: driver table (cx_drv struct) from driver
- * 
- * Called from the driver init routine to register a driver.
- * The cx_drv struct contains the driver name, a pointer to
- * a table of part/mfg numbers and a pointer to the driver's
- * probe/attach routine.
- */
-int cx_driver_register(struct cx_drv *cx_driver)
-{
-	cx_driver->driver.name = cx_driver->name;
-	cx_driver->driver.bus = &tiocx_bus_type;
-
-	return driver_register(&cx_driver->driver);
-}
-
-/**
- * cx_driver_unregister - Unregister the driver.
- * @cx_driver: driver table (cx_drv struct) from driver
- */
-int cx_driver_unregister(struct cx_drv *cx_driver)
-{
-	driver_unregister(&cx_driver->driver);
-	return 0;
-}
-
-/**
- * cx_device_register - Register a device.
- * @nasid: device's nasid
- * @part_num: device's part number
- * @mfg_num: device's manufacturer number
- * @hubdev: hub info associated with this device
- * @bt: board type of the device
- *
- */
-int
-cx_device_register(nasid_t nasid, int part_num, int mfg_num,
-		   struct hubdev_info *hubdev, int bt)
-{
-	struct cx_dev *cx_dev;
-	int r;
-
-	cx_dev = kzalloc(sizeof(struct cx_dev), GFP_KERNEL);
-	DBG("cx_dev= 0x%p\n", cx_dev);
-	if (cx_dev == NULL)
-		return -ENOMEM;
-
-	cx_dev->cx_id.part_num = part_num;
-	cx_dev->cx_id.mfg_num = mfg_num;
-	cx_dev->cx_id.nasid = nasid;
-	cx_dev->hubdev = hubdev;
-	cx_dev->bt = bt;
-
-	cx_dev->dev.parent = NULL;
-	cx_dev->dev.bus = &tiocx_bus_type;
-	cx_dev->dev.release = tiocx_bus_release;
-	dev_set_name(&cx_dev->dev, "%d", cx_dev->cx_id.nasid);
-	r = device_register(&cx_dev->dev);
-	if (r) {
-		kfree(cx_dev);
-		return r;
-	}
-	get_device(&cx_dev->dev);
-
-	device_create_file(&cx_dev->dev, &dev_attr_cxdev_control);
-
-	return 0;
-}
-
-/**
- * cx_device_unregister - Unregister a device.
- * @cx_dev: part/mfg id for the device
- */
-int cx_device_unregister(struct cx_dev *cx_dev)
-{
-	put_device(&cx_dev->dev);
-	device_unregister(&cx_dev->dev);
-	return 0;
-}
-
-/**
- * cx_device_reload - Reload the device.
- * @nasid: device's nasid
- * @part_num: device's part number
- * @mfg_num: device's manufacturer number
- *
- * Remove the device associated with 'nasid' from device list and then
- * call device-register with the given part/mfg numbers.
- */
-static int cx_device_reload(struct cx_dev *cx_dev)
-{
-	cx_device_unregister(cx_dev);
-	return cx_device_register(cx_dev->cx_id.nasid, cx_dev->cx_id.part_num,
-				  cx_dev->cx_id.mfg_num, cx_dev->hubdev,
-				  cx_dev->bt);
-}
-
-static inline u64 tiocx_intr_alloc(nasid_t nasid, int widget,
-					u64 sn_irq_info,
-					int req_irq, nasid_t req_nasid,
-					int req_slice)
-{
-	struct ia64_sal_retval rv;
-	rv.status = 0;
-	rv.v0 = 0;
-
-	ia64_sal_oemcall_nolock(&rv, SN_SAL_IOIF_INTERRUPT,
-				SAL_INTR_ALLOC, nasid,
-				widget, sn_irq_info, req_irq,
-				req_nasid, req_slice);
-	return rv.status;
-}
-
-static inline void tiocx_intr_free(nasid_t nasid, int widget,
-				   struct sn_irq_info *sn_irq_info)
-{
-	struct ia64_sal_retval rv;
-	rv.status = 0;
-	rv.v0 = 0;
-
-	ia64_sal_oemcall_nolock(&rv, SN_SAL_IOIF_INTERRUPT,
-				SAL_INTR_FREE, nasid,
-				widget, sn_irq_info->irq_irq,
-				sn_irq_info->irq_cookie, 0, 0);
-}
-
-struct sn_irq_info *tiocx_irq_alloc(nasid_t nasid, int widget, int irq,
-				    nasid_t req_nasid, int slice)
-{
-	struct sn_irq_info *sn_irq_info;
-	int status;
-	int sn_irq_size = sizeof(struct sn_irq_info);
-
-	if ((nasid & 1) == 0)
-		return NULL;
-
-	sn_irq_info = kzalloc(sn_irq_size, GFP_KERNEL);
-	if (sn_irq_info == NULL)
-		return NULL;
-
-	status = tiocx_intr_alloc(nasid, widget, __pa(sn_irq_info), irq,
-				  req_nasid, slice);
-	if (status) {
-		kfree(sn_irq_info);
-		return NULL;
-	} else {
-		return sn_irq_info;
-	}
-}
-
-void tiocx_irq_free(struct sn_irq_info *sn_irq_info)
-{
-	u64 bridge = (u64) sn_irq_info->irq_bridge;
-	nasid_t nasid = NASID_GET(bridge);
-	int widget;
-
-	if (nasid & 1) {
-		widget = TIO_SWIN_WIDGETNUM(bridge);
-		tiocx_intr_free(nasid, widget, sn_irq_info);
-		kfree(sn_irq_info);
-	}
-}
-
-u64 tiocx_dma_addr(u64 addr)
-{
-	return PHYS_TO_TIODMA(addr);
-}
-
-u64 tiocx_swin_base(int nasid)
-{
-	return TIO_SWIN_BASE(nasid, TIOCX_CORELET);
-}
-
-EXPORT_SYMBOL(cx_driver_register);
-EXPORT_SYMBOL(cx_driver_unregister);
-EXPORT_SYMBOL(cx_device_register);
-EXPORT_SYMBOL(cx_device_unregister);
-EXPORT_SYMBOL(tiocx_irq_alloc);
-EXPORT_SYMBOL(tiocx_irq_free);
-EXPORT_SYMBOL(tiocx_bus_type);
-EXPORT_SYMBOL(tiocx_dma_addr);
-EXPORT_SYMBOL(tiocx_swin_base);
-
-static void tio_conveyor_set(nasid_t nasid, int enable_flag)
-{
-	u64 ice_frz;
-	u64 disable_cb = (1ull << 61);
-
-	if (!(nasid & 1))
-		return;
-
-	ice_frz = REMOTE_HUB_L(nasid, TIO_ICE_FRZ_CFG);
-	if (enable_flag) {
-		if (!(ice_frz & disable_cb))	/* already enabled */
-			return;
-		ice_frz &= ~disable_cb;
-	} else {
-		if (ice_frz & disable_cb)	/* already disabled */
-			return;
-		ice_frz |= disable_cb;
-	}
-	DBG(KERN_ALERT "TIO_ICE_FRZ_CFG= 0x%lx\n", ice_frz);
-	REMOTE_HUB_S(nasid, TIO_ICE_FRZ_CFG, ice_frz);
-}
-
-#define tio_conveyor_enable(nasid) tio_conveyor_set(nasid, 1)
-#define tio_conveyor_disable(nasid) tio_conveyor_set(nasid, 0)
-
-static void tio_corelet_reset(nasid_t nasid, int corelet)
-{
-	if (!(nasid & 1))
-		return;
-
-	REMOTE_HUB_S(nasid, TIO_ICE_PMI_TX_CFG, 1 << corelet);
-	udelay(2000);
-	REMOTE_HUB_S(nasid, TIO_ICE_PMI_TX_CFG, 0);
-	udelay(2000);
-}
-
-static int is_fpga_tio(int nasid, int *bt)
-{
-	u16 uninitialized_var(ioboard_type);	/* GCC be quiet */
-	long rc;
-
-	rc = ia64_sn_sysctl_ioboard_get(nasid, &ioboard_type);
-	if (rc) {
-		printk(KERN_WARNING "ia64_sn_sysctl_ioboard_get failed: %ld\n",
-		       rc);
-		return 0;
-	}
-
-	switch (ioboard_type) {
-	case L1_BRICKTYPE_SA:
-	case L1_BRICKTYPE_ATHENA:
-	case L1_BOARDTYPE_DAYTONA:
-		*bt = ioboard_type;
-		return 1;
-	}
-
-	return 0;
-}
-
-static int bitstream_loaded(nasid_t nasid)
-{
-	u64 cx_credits;
-
-	cx_credits = REMOTE_HUB_L(nasid, TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3);
-	cx_credits &= TIO_ICE_PMI_TX_DYN_CREDIT_STAT_CB3_CREDIT_CNT_MASK;
-	DBG("cx_credits= 0x%lx\n", cx_credits);
-
-	return (cx_credits == 0xf) ? 1 : 0;
-}
-
-static int tiocx_reload(struct cx_dev *cx_dev)
-{
-	int part_num = CX_DEV_NONE;
-	int mfg_num = CX_DEV_NONE;
-	nasid_t nasid = cx_dev->cx_id.nasid;
-
-	if (bitstream_loaded(nasid)) {
-		u64 cx_id;
-		int rv;
-
-		rv = ia64_sn_sysctl_tio_clock_reset(nasid);
-		if (rv) {
-			printk(KERN_ALERT "CX port JTAG reset failed.\n");
-		} else {
-			cx_id = *(volatile u64 *)
-				(TIO_SWIN_BASE(nasid, TIOCX_CORELET) +
-					  WIDGET_ID);
-			part_num = XWIDGET_PART_NUM(cx_id);
-			mfg_num = XWIDGET_MFG_NUM(cx_id);
-			DBG("part= 0x%x, mfg= 0x%x\n", part_num, mfg_num);
-			/* just ignore it if it's a CE */
-			if (part_num == TIO_CE_ASIC_PARTNUM)
-				return 0;
-		}
-	}
-
-	cx_dev->cx_id.part_num = part_num;
-	cx_dev->cx_id.mfg_num = mfg_num;
-
-	/*
-	 * Delete old device and register the new one.  It's ok if
-	 * part_num/mfg_num == CX_DEV_NONE.  We want to register
-	 * devices in the table even if a bitstream isn't loaded.
-	 * That allows use to see that a bitstream isn't loaded via
-	 * TIOCX_IOCTL_DEV_LIST.
-	 */
-	return cx_device_reload(cx_dev);
-}
-
-static ssize_t show_cxdev_control(struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-
-	return sprintf(buf, "0x%x 0x%x 0x%x 0x%x\n",
-		       cx_dev->cx_id.nasid,
-		       cx_dev->cx_id.part_num, cx_dev->cx_id.mfg_num,
-		       cx_dev->bt);
-}
-
-static ssize_t store_cxdev_control(struct device *dev, struct device_attribute *attr, const char *buf,
-				   size_t count)
-{
-	int n;
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	if (count <= 0)
-		return 0;
-
-	n = simple_strtoul(buf, NULL, 0);
-
-	switch (n) {
-	case 1:
-		tio_corelet_reset(cx_dev->cx_id.nasid, TIOCX_CORELET);
-		tiocx_reload(cx_dev);
-		break;
-	case 2:
-		tiocx_reload(cx_dev);
-		break;
-	case 3:
-		tio_corelet_reset(cx_dev->cx_id.nasid, TIOCX_CORELET);
-		break;
-	default:
-		break;
-	}
-
-	return count;
-}
-
-DEVICE_ATTR(cxdev_control, 0644, show_cxdev_control, store_cxdev_control);
-
-static int __init tiocx_init(void)
-{
-	cnodeid_t cnodeid;
-	int found_tiocx_device = 0;
-	int err;
-
-	if (!ia64_platform_is("sn2"))
-		return 0;
-
-	err = bus_register(&tiocx_bus_type);
-	if (err)
-		return err;
-
-	for (cnodeid = 0; cnodeid < num_cnodes; cnodeid++) {
-		nasid_t nasid;
-		int bt;
-
-		nasid = cnodeid_to_nasid(cnodeid);
-
-		if ((nasid & 0x1) && is_fpga_tio(nasid, &bt)) {
-			struct hubdev_info *hubdev;
-			struct xwidget_info *widgetp;
-
-			DBG("Found TIO at nasid 0x%x\n", nasid);
-
-			hubdev =
-			    (struct hubdev_info *)(NODEPDA(cnodeid)->pdinfo);
-
-			widgetp = &hubdev->hdi_xwidget_info[TIOCX_CORELET];
-
-			/* The CE hangs off of the CX port but is not an FPGA */
-			if (widgetp->xwi_hwid.part_num == TIO_CE_ASIC_PARTNUM)
-				continue;
-
-			tio_corelet_reset(nasid, TIOCX_CORELET);
-			tio_conveyor_enable(nasid);
-
-			if (cx_device_register
-			    (nasid, widgetp->xwi_hwid.part_num,
-			     widgetp->xwi_hwid.mfg_num, hubdev, bt) < 0)
-				return -ENXIO;
-			else
-				found_tiocx_device++;
-		}
-	}
-
-	/* It's ok if we find zero devices. */
-	DBG("found_tiocx_device= %d\n", found_tiocx_device);
-
-	return 0;
-}
-
-static int cx_remove_device(struct device * dev, void * data)
-{
-	struct cx_dev *cx_dev = to_cx_dev(dev);
-	device_remove_file(dev, &dev_attr_cxdev_control);
-	cx_device_unregister(cx_dev);
-	return 0;
-}
-
-static void __exit tiocx_exit(void)
-{
-	DBG("tiocx_exit\n");
-
-	/*
-	 * Unregister devices.
-	 */
-	bus_for_each_dev(&tiocx_bus_type, NULL, NULL, cx_remove_device);
-	bus_unregister(&tiocx_bus_type);
-}
-
-fs_initcall(tiocx_init);
-module_exit(tiocx_exit);
-
-/************************************************************************
- * Module licensing and description
- ************************************************************************/
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Bruce Losure <blosure@sgi.com>");
-MODULE_DESCRIPTION("TIOCX module");
-MODULE_SUPPORTED_DEVICE(DEVICE_NAME);