[V3 PATCH 06/16] powerpc/pseries/vas: Define VAS/NXGZIP HCALLs and structs

[Haren Myneni <haren@linux.ibm.com>]

This patch adds HCALLs and other definitions. Also define structs
that are used in VAS implementation on powerVM.

Signed-off-by: Haren Myneni <haren@linux.ibm.com>
---
 arch/powerpc/include/asm/hvcall.h    |  7 ++
 arch/powerpc/include/asm/vas.h       | 28 ++++++++
 arch/powerpc/platforms/pseries/vas.h | 96 ++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+)
 create mode 100644 arch/powerpc/platforms/pseries/vas.h

diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index ed6086d57b22..accbb7f6f272 100644
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -294,6 +294,13 @@
 #define H_RESIZE_HPT_COMMIT	0x370
 #define H_REGISTER_PROC_TBL	0x37C
 #define H_SIGNAL_SYS_RESET	0x380
+#define	H_ALLOCATE_VAS_WINDOW	0x388
+#define	H_MODIFY_VAS_WINDOW	0x38C
+#define	H_DEALLOCATE_VAS_WINDOW	0x390
+#define	H_QUERY_VAS_WINDOW	0x394
+#define	H_QUERY_VAS_CAPABILITIES	0x398
+#define	H_QUERY_NX_CAPABILITIES	0x39C
+#define	H_GET_NX_FAULT		0x3A0
 #define H_INT_GET_SOURCE_INFO   0x3A8
 #define H_INT_SET_SOURCE_CONFIG 0x3AC
 #define H_INT_GET_SOURCE_CONFIG 0x3B0
diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h
index f928bf4c7e98..d15784506a54 100644
--- a/arch/powerpc/include/asm/vas.h
+++ b/arch/powerpc/include/asm/vas.h
@@ -179,6 +179,7 @@ struct vas_tx_win_attr {
 	bool rx_win_ord_mode;
 };
 
+#ifdef CONFIG_PPC_POWERNV
 /*
  * Helper to map a chip id to VAS id.
  * For POWER9, this is a 1:1 mapping. In the future this maybe a 1:N
@@ -243,6 +244,33 @@ int vas_paste_crb(struct vas_window *win, int offset, bool re);
 int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type,
 			     const char *name);
 void vas_unregister_api_powernv(void);
+#endif
+
+#ifdef CONFIG_PPC_PSERIES
+
+/* VAS Capabilities */
+#define VAS_GZIP_QOS_FEAT	0x1
+#define VAS_GZIP_DEF_FEAT	0x2
+#define VAS_GZIP_QOS_FEAT_BIT	(1UL << (63 - VAS_GZIP_QOS_FEAT)) /* Bit 1 */
+#define VAS_GZIP_DEF_FEAT_BIT	(1UL << (63 - VAS_GZIP_DEF_FEAT)) /* Bit 2 */
+
+/* NX Capabilities */
+#define	VAS_NX_GZIP_FEAT	0x1
+#define	VAS_NX_GZIP_FEAT_BIT	(1UL << (63 - VAS_NX_GZIP_FEAT)) /* Bit 1 */
+#define	VAS_DESCR_LEN		8
+
+struct vas_all_capabs_be {
+		__be64  descriptor;
+		__be64  feat_type;
+} __packed __aligned(0x1000);
+
+struct vas_all_capabs {
+	char	name[VAS_DESCR_LEN + 1];
+	u64     descriptor;
+	u64     feat_type;
+};
+
+#endif
 
 /*
  * Register / unregister coprocessor type to VAS API which will be exported
diff --git a/arch/powerpc/platforms/pseries/vas.h b/arch/powerpc/platforms/pseries/vas.h
new file mode 100644
index 000000000000..208682fffa57
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/vas.h
@@ -0,0 +1,96 @@
+/* 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	(1UL << 63)
+#define	VAS_MOD_WIN_JOBS_KILL	(1UL << (63 - 1))
+#define	VAS_MOD_WIN_DR		(1UL << (63 - 3))
+#define	VAS_MOD_WIN_PR		(1UL << (63 - 4))
+#define	VAS_MOD_WIN_SF		(1UL << (63 - 5))
+#define	VAS_MOD_WIN_TA		(1UL << (63 - 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
+
+/*
+ * 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,
+};
+
+struct vas_ct_capabs_be {
+	__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);
+
+struct vas_ct_capabs {
+	char		name[VAS_DESCR_LEN + 1];
+	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	target_lpar_creds;
+	atomic_t	used_lpar_creds; /* Used credits so far */
+	u16		avail_lpar_creds; /* Remaining available credits */
+};
+
+struct vas_capabs {
+	struct vas_ct_capabs capab;
+	struct list_head list;
+};
+
+struct vas_win_lpar_be {
+	__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;
+	__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);
+
+#endif /* _VAS_H */
-- 
2.18.2