powerpc/pseries/vas: Define VAS/NXGZIP hcalls and structs

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>
Acked-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b4b8c594c27ee4aa6be9dc6dc4ee7331571cbbe8.camel@linux.ibm.com

diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index e3b29ed..7c3418d 100644 (file)
--- 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 14ad798..99570c3 100644 (file)
--- a/arch/powerpc/include/asm/vas.h
+++ b/arch/powerpc/include/asm/vas.h
@@ -160,6 +160,7 @@ 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
@@ -225,6 +226,35 @@ 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  PPC_BIT(VAS_GZIP_QOS_FEAT) /* Bit 1 */
+#define VAS_GZIP_DEF_FEAT_BIT  PPC_BIT(VAS_GZIP_DEF_FEAT) /* Bit 2 */
+
+/* NX Capabilities */
+#define VAS_NX_GZIP_FEAT       0x1
+#define VAS_NX_GZIP_FEAT_BIT   PPC_BIT(VAS_NX_GZIP_FEAT) /* Bit 1 */
+
+/*
+ * These structs are used to retrieve overall VAS capabilities that
+ * the hypervisor provides.
+ */
+struct hv_vas_all_caps {
+       __be64  descriptor;
+       __be64  feat_type;
+} __packed __aligned(0x1000);
+
+struct vas_all_caps {
+       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 (file)
index 0000000..4ecb3fc
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/vas.h
@@ -0,0 +1,125 @@
+/* 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
+
+/*
+ * 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        target_lpar_creds;
+       atomic_t        used_lpar_creds; /* Used credits so far */
+       u16             avail_lpar_creds; /* Remaining available credits */
+};
+
+/*
+ * 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 */
+};
+
+/*
+ * 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;
+
+       /* List of windows opened which is used for LPM */
+       struct list_head win_list;
+       u64 flags;
+       char *name;
+       int fault_virq;
+};
+#endif /* _VAS_H */