Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / misc / sgi-xp / xp_uv.c

diff --git a/kernel/drivers/misc/sgi-xp/xp_uv.c b/kernel/drivers/misc/sgi-xp/xp_uv.c
new file mode 100644 (file)
index 0000000..a0d0932
--- /dev/null
+++ b/kernel/drivers/misc/sgi-xp/xp_uv.c
@@ -0,0 +1,171 @@
+/*
+ * 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) 2008 Silicon Graphics, Inc.  All Rights Reserved.
+ */
+
+/*
+ * Cross Partition (XP) uv-based functions.
+ *
+ *      Architecture specific implementation of common functions.
+ *
+ */
+
+#include <linux/device.h>
+#include <asm/uv/uv_hub.h>
+#if defined CONFIG_X86_64
+#include <asm/uv/bios.h>
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+#include <asm/sn/sn_sal.h>
+#endif
+#include "../sgi-gru/grukservices.h"
+#include "xp.h"
+
+/*
+ * Convert a virtual memory address to a physical memory address.
+ */
+static unsigned long
+xp_pa_uv(void *addr)
+{
+       return uv_gpa(addr);
+}
+
+/*
+ * Convert a global physical to socket physical address.
+ */
+static unsigned long
+xp_socket_pa_uv(unsigned long gpa)
+{
+       return uv_gpa_to_soc_phys_ram(gpa);
+}
+
+static enum xp_retval
+xp_remote_mmr_read(unsigned long dst_gpa, const unsigned long src_gpa,
+                  size_t len)
+{
+       int ret;
+       unsigned long *dst_va = __va(uv_gpa_to_soc_phys_ram(dst_gpa));
+
+       BUG_ON(!uv_gpa_in_mmr_space(src_gpa));
+       BUG_ON(len != 8);
+
+       ret = gru_read_gpa(dst_va, src_gpa);
+       if (ret == 0)
+               return xpSuccess;
+
+       dev_err(xp, "gru_read_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
+               "len=%ld\n", dst_gpa, src_gpa, len);
+       return xpGruCopyError;
+}
+
+
+static enum xp_retval
+xp_remote_memcpy_uv(unsigned long dst_gpa, const unsigned long src_gpa,
+                   size_t len)
+{
+       int ret;
+
+       if (uv_gpa_in_mmr_space(src_gpa))
+               return xp_remote_mmr_read(dst_gpa, src_gpa, len);
+
+       ret = gru_copy_gpa(dst_gpa, src_gpa, len);
+       if (ret == 0)
+               return xpSuccess;
+
+       dev_err(xp, "gru_copy_gpa() failed, dst_gpa=0x%016lx src_gpa=0x%016lx "
+               "len=%ld\n", dst_gpa, src_gpa, len);
+       return xpGruCopyError;
+}
+
+static int
+xp_cpu_to_nasid_uv(int cpuid)
+{
+       /* ??? Is this same as sn2 nasid in mach/part bitmaps set up by SAL? */
+       return UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpuid));
+}
+
+static enum xp_retval
+xp_expand_memprotect_uv(unsigned long phys_addr, unsigned long size)
+{
+       int ret;
+
+#if defined CONFIG_X86_64
+       ret = uv_bios_change_memprotect(phys_addr, size, UV_MEMPROT_ALLOW_RW);
+       if (ret != BIOS_STATUS_SUCCESS) {
+               dev_err(xp, "uv_bios_change_memprotect(,, "
+                       "UV_MEMPROT_ALLOW_RW) failed, ret=%d\n", ret);
+               return xpBiosError;
+       }
+
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+       u64 nasid_array;
+
+       ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_1,
+                                  &nasid_array);
+       if (ret != 0) {
+               dev_err(xp, "sn_change_memprotect(,, "
+                       "SN_MEMPROT_ACCESS_CLASS_1,) failed ret=%d\n", ret);
+               return xpSalError;
+       }
+#else
+       #error not a supported configuration
+#endif
+       return xpSuccess;
+}
+
+static enum xp_retval
+xp_restrict_memprotect_uv(unsigned long phys_addr, unsigned long size)
+{
+       int ret;
+
+#if defined CONFIG_X86_64
+       ret = uv_bios_change_memprotect(phys_addr, size,
+                                       UV_MEMPROT_RESTRICT_ACCESS);
+       if (ret != BIOS_STATUS_SUCCESS) {
+               dev_err(xp, "uv_bios_change_memprotect(,, "
+                       "UV_MEMPROT_RESTRICT_ACCESS) failed, ret=%d\n", ret);
+               return xpBiosError;
+       }
+
+#elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV
+       u64 nasid_array;
+
+       ret = sn_change_memprotect(phys_addr, size, SN_MEMPROT_ACCESS_CLASS_0,
+                                  &nasid_array);
+       if (ret != 0) {
+               dev_err(xp, "sn_change_memprotect(,, "
+                       "SN_MEMPROT_ACCESS_CLASS_0,) failed ret=%d\n", ret);
+               return xpSalError;
+       }
+#else
+       #error not a supported configuration
+#endif
+       return xpSuccess;
+}
+
+enum xp_retval
+xp_init_uv(void)
+{
+       BUG_ON(!is_uv());
+
+       xp_max_npartitions = XP_MAX_NPARTITIONS_UV;
+       xp_partition_id = sn_partition_id;
+       xp_region_size = sn_region_size;
+
+       xp_pa = xp_pa_uv;
+       xp_socket_pa = xp_socket_pa_uv;
+       xp_remote_memcpy = xp_remote_memcpy_uv;
+       xp_cpu_to_nasid = xp_cpu_to_nasid_uv;
+       xp_expand_memprotect = xp_expand_memprotect_uv;
+       xp_restrict_memprotect = xp_restrict_memprotect_uv;
+
+       return xpSuccess;
+}
+
+void
+xp_exit_uv(void)
+{
+       BUG_ON(!is_uv());
+}