++++++++++++++++++++++++++++++++++++++++
=C2=A09 files changed, 210 insertions(+), 2 deletions(-)
=C2=A0create mode 100644 drivers/misc/vas/Kconfig
=C2=A0create mode 100644 drivers/misc/vas/Makefile
=C2=A0create mode 100644 drivers/misc/vas/vas-window.c
=C2=A0create mode 100644 drivers/misc/vas/vas.c
=20

diff --git a/MAINTAINERS b/MAINTAINERS
index 2a910c9..4037252 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS

@@ -3673,8 +3673,6 @@ F:	arch/powerpc/platforms/powernv/pci-cxl.c

=C2=A0F:	drivers/misc/cxl/
=C2=A0F:	include/misc/cxl*
=C2=A0F:	include/uapi/misc/cxl.h
-F:	Documentation/powerpc/cxl.txt
-F:	Documentation/ABI/testing/sysfs-class-cxl

DRIVER
=C2=A0M:	Manoj N. Kumar [off-list ref]

@@ -3686,6 +3684,12 @@ F:	drivers/scsi/cxlflash/

=C2=A0F:	include/uapi/scsi/cxlflash_ioctls.h
=C2=A0F:	Documentation/powerpc/cxlflash.txt
=C2=A0
+VAS (IBM Virtual Accelerator Switch) DRIVER
+M:	Sukadev Bhattiprolu [off-list ref]
+L:	linuxppc-dev@lists.ozlabs.org
+S:	Supported
+F:	drivers/misc/vas/
+

=C2=A0STMMAC ETHERNET DRIVER
=C2=A0M:	Giuseppe Cavallaro [off-list ref]
=C2=A0M:	Alexandre Torgue [off-list ref]

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/re=

index fc879fd..7a45ff7 100644

--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h

@@ -1225,6 +1225,7 @@

=C2=A0#define PVR_POWER8E	0x004B
=C2=A0#define PVR_POWER8NVL	0x004C
=C2=A0#define PVR_POWER8	0x004D
+#define PVR_POWER9	0x004E

=C2=A0#define PVR_BE		0x0070
=C2=A0#define PVR_PA6T	0x0090
=C2=A0

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index c290990..97d652e 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig

@@ -783,4 +783,5 @@ source "drivers/misc/mic/Kconfig"

=C2=A0source "drivers/misc/genwqe/Kconfig"
=C2=A0source "drivers/misc/echo/Kconfig"
=C2=A0source "drivers/misc/cxl/Kconfig"
+source "drivers/misc/vas/Kconfig"
=C2=A0endmenu

diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 7a3ea89..5201ffd 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile

@@ -53,6 +53,7 @@ obj-$(CONFIG_GENWQE)		+=3D genwqe/

=C2=A0obj-$(CONFIG_ECHO)		+=3D echo/
=C2=A0obj-$(CONFIG_VEXPRESS_SYSCFG)	+=3D vexpress-syscfg.o
=C2=A0obj-$(CONFIG_CXL_BASE)		+=3D cxl/
+obj-$(CONFIG_VAS)		+=3D vas/
=C2=A0obj-$(CONFIG_PANEL)=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=

=C2=A0
=C2=A0lkdtm-$(CONFIG_LKDTM)		+=3D lkdtm_core.o

diff --git a/drivers/misc/vas/Kconfig b/drivers/misc/vas/Kconfig
new file mode 100644
index 0000000..43cedda
--- /dev/null
+++ b/drivers/misc/vas/Kconfig

@@ -0,0 +1,21 @@
+#
+# IBM Virtual Accelarator Switchboard (VAS) compatible devices
+#depends on PPC_POWERNV && PCI_MSI && EEH
+#
+
+config VAS
+	tristate "Support for IBM Virtual Accelerator Switchboard (VAS)"
+	depends on PPC_POWERNV
+	default n
+	help
+	=C2=A0=C2=A0Select this option to enable driver support for IBM Virtual
+	=C2=A0=C2=A0Accelerator Switchboard (VAS).
+
+	=C2=A0=C2=A0VAS allows accelerators in co processors like NX-842 to be
+	=C2=A0=C2=A0directly available to a user process. This driver enables
+	=C2=A0=C2=A0userspace programs to access these accelerators via device
+	=C2=A0=C2=A0nodes like /dev/crypto/nx-gzip.

+
+	=C2=A0=C2=A0VAS adapters are found in POWER9 based systems.
+
+	=C2=A0=C2=A0If unsure, say N.

diff --git a/drivers/misc/vas/Makefile b/drivers/misc/vas/Makefile
new file mode 100644
index 0000000..7dd7139
--- /dev/null
+++ b/drivers/misc/vas/Makefile

@@ -0,0 +1,3 @@
+ccflags-y			:=3D $(call cc-disable-warning, unused-const-

variable)
+ccflags-$(CONFIG_PPC_WERROR)	+=3D -Werror
+obj-$(CONFIG_VAS)		+=3D vas.o vas-window.o

diff --git a/drivers/misc/vas/vas-internal.h b/drivers/misc/vas/vas-inter=

index ce48f14..15b62e0 100644

--- a/drivers/misc/vas/vas-internal.h
+++ b/drivers/misc/vas/vas-internal.h

@@ -389,4 +389,7 @@ struct vas_winctx {

=C2=A0	enum vas_notify_after_count notify_after_count;
=C2=A0};
=C2=A0
+extern int vas_initialized;

+extern int vas_window_reset(struct vas_instance *vinst, int winid);
+extern struct vas_instance *find_vas_instance(int vasid);
=C2=A0#endif

diff --git a/drivers/misc/vas/vas-window.c b/drivers/misc/vas/vas-window.=

new file mode 100644
index 0000000..468f3bf

--- /dev/null
+++ b/drivers/misc/vas/vas-window.c

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2016 IBM 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <asm/vas.h>
+#include "vas-internal.h"
+
+/* stub for now */
+int vas_window_reset(struct vas_instance *vinst, int winid)
+{
+	return 0;

+}

diff --git a/drivers/misc/vas/vas.c b/drivers/misc/vas/vas.c
new file mode 100644
index 0000000..75e55f9
--- /dev/null
+++ b/drivers/misc/vas/vas.c

@@ -0,0 +1,155 @@
+/*
+ * Copyright 2016 IBM 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; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/export.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <asm/vas.h>
+#include "vas-internal.h"
+
+int vas_initialized;
+int vas_num_instances;
+struct vas_instance *vas_instances;
+
+static void init_vas_chip(struct vas_instance *vinst)
+{
+	int i;
+
+	for (i =3D 0; i < VAS_MAX_WINDOWS_PER_CHIP; i++)
+		vas_window_reset(vinst, i);
+}
+
+static int init_vas_instance(struct device_node *dn,
+				struct vas_instance *vinst)
+{
+	int rc;
+	const __be32 *p;
+
+	ida_init(&vinst->ida);
+	mutex_init(&vinst->mutex);
+
+	p =3D of_get_property(dn, "vas-id", NULL);
+	if (!p) {
+		pr_err("VAS: NULL vas-id? %p\n", p);
+		return -ENODEV;
+	}
+
+	vinst->vas_id =3D of_read_number(p, 1);
+
+	rc =3D of_property_read_u64(dn, "hvwc-bar-start", &vinst-

quoted

hvwc_bar_start);

+	if (rc)
+		return rc;
+
+	rc =3D of_property_read_u64(dn, "hvwc-bar-size", &vinst->hvwc_bar_len);
+	if (rc)
+		return rc;
+
+	rc =3D of_property_read_u64(dn, "uwc-bar-start", &vinst-

quoted

uwc_bar_start);

+	if (rc)
+		return rc;
+
+	rc =3D of_property_read_u64(dn, "uwc-bar-size", &vinst->uwc_bar_len);
+	if (rc)
+		return rc;
+
+	rc =3D of_property_read_u64(dn, "window-base", &vinst->win_base_addr);
+	if (rc)
+		return rc;
+
+	rc =3D of_property_read_u64(dn, "window-shift", &vinst->win_id_shift);
+	if (rc)
+		return rc;
+
+	init_vas_chip(vinst);
+
+	return 0;
+}
+
+/*
+ * Although this is read/used multiple times, it is written to only
+ * during initialization.
+ */
+struct vas_instance *find_vas_instance(int vasid)
+{
+	int i;
+	struct vas_instance *vinst;
+
+	for (i =3D 0; i < vas_num_instances; i++) {
+		vinst =3D &vas_instances[i];
+		if (vinst->vas_id =3D=3D vasid)
+			return vinst;
+	}
+	pr_err("VAS instance for vas-id %d not found\n", vasid);
+	WARN_ON_ONCE(1);
+	return NULL;
+}
+
+
+int vas_init(void)
+{
+	int rc;
+	struct device_node *dn;
+	struct vas_instance *vinst;
+
+	if (!pvr_version_is(PVR_POWER9))
+		return -ENODEV;
+
+	vas_num_instances =3D 0;
+	for_each_node_by_name(dn, "vas")
+		vas_num_instances++;
+
+	if (!vas_num_instances)
+		return -ENODEV;
+
+	vas_instances =3D kcalloc(vas_num_instances, sizeof(*vinst),
GFP_KERNEL);
+	if (!vas_instances)
+		return -ENOMEM;
+
+	vinst =3D &vas_instances[0];
+	for_each_node_by_name(dn, "vas") {
+		rc =3D init_vas_instance(dn, vinst);
+		if (rc) {
+			pr_err("Error %d initializing VAS instance %ld\n",
rc,
+					(vinst-&vas_instances[0]));
+			goto cleanup;
+		}
+		vinst++;
+	}
+
+	rc =3D -ENODEV;
+	if (vinst =3D=3D &vas_instances[0]) {
+		/* Should not happen as we saw some above. */
+		pr_err("VAS: Did not find any VAS DT nodes now!\n");
+		goto cleanup;
+	}
+
+	pr_devel("VAS: Initialized %d instances\n", vas_num_instances);
+	vas_initialized =3D 1;
+
+	return 0;
+
+cleanup:
+	kfree(vas_instances);
+	return rc;
+}
+
+void vas_exit(void)
+{
+	vas_initialized =3D 0;
+	kfree(vas_instances);
+}
+
+module_init(vas_init);
+module_exit(vas_exit);
+MODULE_DESCRIPTION("IBM Virtual Accelerator Switchboard");
+MODULE_AUTHOR("Sukadev Bhattiprolu [off-list ref]");
+MODULE_LICENSE("GPL");