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

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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
This commit is contained in:
Haren Myneni 2021-06-17 13:34:05 -07:00 committed by Michael Ellerman
parent 7bc6f71bdf
commit 8f3a6c9280
3 changed files with 162 additions and 0 deletions
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7
arch/powerpc/include/asm/hvcall.h
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@ -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

30
arch/powerpc/include/asm/vas.h
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@ -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

125
arch/powerpc/platforms/pseries/vas.h Normal file
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@ -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 */