[PATCH v5 08/17] powerpc/pseries/vas: Define VAS/NXGZIP hcalls and structs

Haren Myneni
2021-06-13T10:59:59Z

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 | 30 +++++++
arch/powerpc/platforms/pseries/vas.h | 125 +++++++++++++++++++++++++++
3 files changed, 162 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 e3b29eda8074..7c3418d1b5e9 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 1acf2b18c2d1..eefc758d8cd4 100644
--- 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
index 000000000000..3a798102de93
--- /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_ct_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_ct_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_ct_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 */
--
2.18.2