Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 157 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pseries/vas.h b/arch/powerpc/platforms/pseries/vas.h
new file mode 100644
index 0000000000..45567cd131
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/vas.h
@@ -0,0 +1,157 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright 2020-21 IBM Corp.
+ */
+
+#ifndef _VAS_H
+#define _VAS_H
+#include <asm/vas.h>
+#include <linux/mutex.h>
+#include <linux/stringify.h>
+
+/*
+ * VAS window modify flags
+ */
+#define VAS_MOD_WIN_CLOSE	PPC_BIT(0)
+#define VAS_MOD_WIN_JOBS_KILL	PPC_BIT(1)
+#define VAS_MOD_WIN_DR		PPC_BIT(3)
+#define VAS_MOD_WIN_PR		PPC_BIT(4)
+#define VAS_MOD_WIN_SF		PPC_BIT(5)
+#define VAS_MOD_WIN_TA		PPC_BIT(6)
+#define VAS_MOD_WIN_FLAGS	(VAS_MOD_WIN_JOBS_KILL | VAS_MOD_WIN_DR | \
+				VAS_MOD_WIN_PR | VAS_MOD_WIN_SF)
+
+#define VAS_WIN_ACTIVE		0x0
+#define VAS_WIN_CLOSED		0x1
+#define VAS_WIN_INACTIVE	0x2	/* Inactive due to HW failure */
+/* Process of being modified, deallocated, or quiesced */
+#define VAS_WIN_MOD_IN_PROCESS	0x3
+
+#define VAS_COPY_PASTE_USER_MODE	0x00000001
+#define VAS_COP_OP_USER_MODE		0x00000010
+
+#define VAS_GZIP_QOS_CAPABILITIES	0x56516F73477A6970
+#define VAS_GZIP_DEFAULT_CAPABILITIES	0x56446566477A6970
+
+enum vas_migrate_action {
+	VAS_SUSPEND,
+	VAS_RESUME,
+};
+
+/*
+ * Co-processor feature - GZIP QoS windows or GZIP default windows
+ */
+enum vas_cop_feat_type {
+	VAS_GZIP_QOS_FEAT_TYPE,
+	VAS_GZIP_DEF_FEAT_TYPE,
+	VAS_MAX_FEAT_TYPE,
+};
+
+/*
+ * Use to get feature specific capabilities from the
+ * hypervisor.
+ */
+struct hv_vas_cop_feat_caps {
+	__be64	descriptor;
+	u8	win_type;		/* Default or QoS type */
+	u8	user_mode;
+	__be16	max_lpar_creds;
+	__be16	max_win_creds;
+	union {
+		__be16	reserved;
+		__be16	def_lpar_creds; /* Used for default capabilities */
+	};
+	__be16	target_lpar_creds;
+} __packed __aligned(0x1000);
+
+/*
+ * Feature specific (QoS or default) capabilities.
+ */
+struct vas_cop_feat_caps {
+	u64		descriptor;
+	u8		win_type;	/* Default or QoS type */
+	u8		user_mode;	/* User mode copy/paste or COP HCALL */
+	u16		max_lpar_creds;	/* Max credits available in LPAR */
+	/* Max credits can be assigned per window */
+	u16		max_win_creds;
+	union {
+		u16	reserved;	/* Used for QoS credit type */
+		u16	def_lpar_creds; /* Used for default credit type */
+	};
+	/* Total LPAR available credits. Can be different from max LPAR */
+	/* credits due to DLPAR operation */
+	atomic_t	nr_total_credits;	/* Total credits assigned to LPAR */
+	atomic_t	nr_used_credits;	/* Used credits so far */
+};
+
+/*
+ * Feature (QoS or Default) specific to store capabilities and
+ * the list of open windows.
+ */
+struct vas_caps {
+	struct vas_cop_feat_caps caps;
+	struct list_head list;	/* List of open windows */
+	int nr_open_wins_progress;	/* Number of open windows in */
+					/* progress. Used in migration */
+	int nr_close_wins;	/* closed windows in the hypervisor for DLPAR */
+	int nr_open_windows;	/* Number of successful open windows */
+	u8 feat;		/* Feature type */
+};
+
+/*
+ * To get window information from the hypervisor.
+ */
+struct hv_vas_win_lpar {
+	__be16	version;
+	u8	win_type;
+	u8	status;
+	__be16	credits;	/* No of credits assigned to this window */
+	__be16	reserved;
+	__be32	pid;		/* LPAR Process ID */
+	__be32	tid;		/* LPAR Thread ID */
+	__be64	win_addr;	/* Paste address */
+	__be32	interrupt;	/* Interrupt when NX request completes */
+	__be32	fault;		/* Interrupt when NX sees fault */
+	/* Associativity Domain Identifiers as returned in */
+	/* H_HOME_NODE_ASSOCIATIVITY */
+	__be64	domain[6];
+	__be64	win_util;	/* Number of bytes processed */
+} __packed __aligned(0x1000);
+
+struct pseries_vas_window {
+	struct vas_window vas_win;
+	u64 win_addr;		/* Physical paste address */
+	u8 win_type;		/* QoS or Default window */
+	u32 complete_irq;	/* Completion interrupt */
+	u32 fault_irq;		/* Fault interrupt */
+	u64 domain[6];		/* Associativity domain Ids */
+				/* this window is allocated */
+	u64 util;
+	u32 pid;		/* PID associated with this window */
+
+	/* List of windows opened which is used for LPM */
+	struct list_head win_list;
+	u64 flags;
+	char *name;
+	int fault_virq;
+	atomic_t pending_faults; /* Number of pending faults */
+};
+
+int sysfs_add_vas_caps(struct vas_cop_feat_caps *caps);
+int vas_reconfig_capabilties(u8 type, int new_nr_creds);
+int __init sysfs_pseries_vas_init(struct vas_all_caps *vas_caps);
+
+#ifdef CONFIG_PPC_VAS
+int vas_migration_handler(int action);
+int pseries_vas_dlpar_cpu(void);
+#else
+static inline int vas_migration_handler(int action)
+{
+	return 0;
+}
+static inline int pseries_vas_dlpar_cpu(void)
+{
+	return 0;
+}
+#endif
+#endif /* _VAS_H */