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author | Haren Myneni <haren@linux.ibm.com> | 2021-06-17 22:34:05 +0200 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-06-20 13:58:56 +0200 |
commit | 8f3a6c92802b7c48043954ba3b507e9b33d8c898 (patch) | |
tree | 99be1598cfd9e77d79b99370f3a2cee11d7b935b /arch/powerpc/platforms | |
parent | powerpc/vas: Define and use common vas_window struct (diff) | |
download | linux-8f3a6c92802b7c48043954ba3b507e9b33d8c898.tar.xz linux-8f3a6c92802b7c48043954ba3b507e9b33d8c898.zip |
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
Diffstat (limited to 'arch/powerpc/platforms')
-rw-r--r-- | arch/powerpc/platforms/pseries/vas.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/vas.h b/arch/powerpc/platforms/pseries/vas.h new file mode 100644 index 000000000000..4ecb3fcabd10 --- /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 */ |