1 files changed, 269 insertions, 0 deletions
diff --git a/arch/x86/platform/uv/bios_uv.c b/arch/x86/platform/uv/bios_uv.c
new file mode 100644
index 000000000..bf31af3d3
--- /dev/null
+++ b/arch/x86/platform/uv/bios_uv.c
@@ -0,0 +1,269 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * BIOS run time interface routines.
+ *
+ * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
+ * Copyright (C) 2007-2017 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (c) Russ Anderson <rja@sgi.com>
+ */
+
+#include <linux/efi.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <asm/efi.h>
+#include <linux/io.h>
+#include <asm/pgalloc.h>
+#include <asm/uv/bios.h>
+#include <asm/uv/uv_hub.h>
+
+unsigned long uv_systab_phys __ro_after_init = EFI_INVALID_TABLE_ADDR;
+
+struct uv_systab *uv_systab;
+
+static s64 __uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
+			u64 a4, u64 a5)
+{
+	struct uv_systab *tab = uv_systab;
+	s64 ret;
+
+	if (!tab || !tab->function)
+		/*
+		 * BIOS does not support UV systab
+		 */
+		return BIOS_STATUS_UNIMPLEMENTED;
+
+	ret = efi_call_virt_pointer(tab, function, (u64)which, a1, a2, a3, a4, a5);
+
+	return ret;
+}
+
+static s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4,
+		u64 a5)
+{
+	s64 ret;
+
+	if (down_interruptible(&__efi_uv_runtime_lock))
+		return BIOS_STATUS_ABORT;
+
+	ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
+	up(&__efi_uv_runtime_lock);
+
+	return ret;
+}
+
+static s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
+		u64 a4, u64 a5)
+{
+	unsigned long bios_flags;
+	s64 ret;
+
+	if (down_interruptible(&__efi_uv_runtime_lock))
+		return BIOS_STATUS_ABORT;
+
+	local_irq_save(bios_flags);
+	ret = __uv_bios_call(which, a1, a2, a3, a4, a5);
+	local_irq_restore(bios_flags);
+
+	up(&__efi_uv_runtime_lock);
+
+	return ret;
+}
+
+long sn_partition_id;
+EXPORT_SYMBOL_GPL(sn_partition_id);
+long sn_coherency_id;
+EXPORT_SYMBOL_GPL(sn_coherency_id);
+long sn_region_size;
+EXPORT_SYMBOL_GPL(sn_region_size);
+long system_serial_number;
+int uv_type;
+
+s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
+		long *region, long *ssn)
+{
+	s64 ret;
+	u64 v0, v1;
+	union partition_info_u part;
+
+	ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
+				(u64)(&v0), (u64)(&v1), 0, 0);
+	if (ret != BIOS_STATUS_SUCCESS)
+		return ret;
+
+	part.val = v0;
+	if (uvtype)
+		*uvtype = part.hub_version;
+	if (partid)
+		*partid = part.partition_id;
+	if (coher)
+		*coher = part.coherence_id;
+	if (region)
+		*region = part.region_size;
+	if (ssn)
+		*ssn = v1;
+	return ret;
+}
+
+int
+uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
+			   unsigned long *intr_mmr_offset)
+{
+	u64 watchlist;
+	s64 ret;
+
+	/*
+	 * bios returns watchlist number or negative error number.
+	 */
+	ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
+			mq_size, (u64)intr_mmr_offset,
+			(u64)&watchlist, 0);
+	if (ret < BIOS_STATUS_SUCCESS)
+		return ret;
+
+	return watchlist;
+}
+EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
+
+int
+uv_bios_mq_watchlist_free(int blade, int watchlist_num)
+{
+	return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
+				blade, watchlist_num, 0, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
+
+s64
+uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
+{
+	return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
+					perms, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
+
+s64
+uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
+{
+	return uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
+				    (u64)addr, buf, (u64)len, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
+
+s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
+{
+	return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
+			   (u64)ticks_per_second, 0, 0, 0);
+}
+
+/*
+ * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
+ * @decode: true to enable target, false to disable target
+ * @domain: PCI domain number
+ * @bus: PCI bus number
+ *
+ * Returns:
+ *    0: Success
+ *    -EINVAL: Invalid domain or bus number
+ *    -ENOSYS: Capability not available
+ *    -EBUSY: Legacy VGA I/O cannot be retargeted at this time
+ */
+int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
+{
+	return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
+				(u64)decode, (u64)domain, (u64)bus, 0, 0);
+}
+
+extern s64 uv_bios_get_master_nasid(u64 size, u64 *master_nasid)
+{
+	return uv_bios_call(UV_BIOS_EXTRA, 0, UV_BIOS_EXTRA_MASTER_NASID, 0,
+				size, (u64)master_nasid);
+}
+EXPORT_SYMBOL_GPL(uv_bios_get_master_nasid);
+
+extern s64 uv_bios_get_heapsize(u64 nasid, u64 size, u64 *heap_size)
+{
+	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_GET_HEAPSIZE,
+				0, size, (u64)heap_size);
+}
+EXPORT_SYMBOL_GPL(uv_bios_get_heapsize);
+
+extern s64 uv_bios_install_heap(u64 nasid, u64 heap_size, u64 *bios_heap)
+{
+	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_INSTALL_HEAP,
+				0, heap_size, (u64)bios_heap);
+}
+EXPORT_SYMBOL_GPL(uv_bios_install_heap);
+
+extern s64 uv_bios_obj_count(u64 nasid, u64 size, u64 *objcnt)
+{
+	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_OBJECT_COUNT,
+				0, size, (u64)objcnt);
+}
+EXPORT_SYMBOL_GPL(uv_bios_obj_count);
+
+extern s64 uv_bios_enum_objs(u64 nasid, u64 size, u64 *objbuf)
+{
+	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_OBJECTS,
+				0, size, (u64)objbuf);
+}
+EXPORT_SYMBOL_GPL(uv_bios_enum_objs);
+
+extern s64 uv_bios_enum_ports(u64 nasid, u64 obj_id, u64 size, u64 *portbuf)
+{
+	return uv_bios_call(UV_BIOS_EXTRA, nasid, UV_BIOS_EXTRA_ENUM_PORTS,
+				obj_id, size, (u64)portbuf);
+}
+EXPORT_SYMBOL_GPL(uv_bios_enum_ports);
+
+extern s64 uv_bios_get_geoinfo(u64 nasid, u64 size, u64 *buf)
+{
+	return uv_bios_call(UV_BIOS_GET_GEOINFO, nasid, (u64)buf, size, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_get_geoinfo);
+
+extern s64 uv_bios_get_pci_topology(u64 size, u64 *buf)
+{
+	return uv_bios_call(UV_BIOS_GET_PCI_TOPOLOGY, (u64)buf, size, 0, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_get_pci_topology);
+
+unsigned long get_uv_systab_phys(bool msg)
+{
+	if ((uv_systab_phys == EFI_INVALID_TABLE_ADDR) ||
+	    !uv_systab_phys || efi_runtime_disabled()) {
+		if (msg)
+			pr_crit("UV: UVsystab: missing\n");
+		return 0;
+	}
+	return uv_systab_phys;
+}
+
+int uv_bios_init(void)
+{
+	unsigned long uv_systab_phys_addr;
+
+	uv_systab = NULL;
+	uv_systab_phys_addr = get_uv_systab_phys(1);
+	if (!uv_systab_phys_addr)
+		return -EEXIST;
+
+	uv_systab = ioremap(uv_systab_phys_addr, sizeof(struct uv_systab));
+	if (!uv_systab || strncmp(uv_systab->signature, UV_SYSTAB_SIG, 4)) {
+		pr_err("UV: UVsystab: bad signature!\n");
+		iounmap(uv_systab);
+		return -EINVAL;
+	}
+
+	/* Starting with UV4 the UV systab size is variable */
+	if (uv_systab->revision >= UV_SYSTAB_VERSION_UV4) {
+		int size = uv_systab->size;
+
+		iounmap(uv_systab);
+		uv_systab = ioremap(uv_systab_phys_addr, size);
+		if (!uv_systab) {
+			pr_err("UV: UVsystab: ioremap(%d) failed!\n", size);
+			return -EFAULT;
+		}
+	}
+	pr_info("UV: UVsystab: Revision:%x\n", uv_systab->revision);
+	return 0;
+}