diff options
Diffstat (limited to 'drivers/staging/unisys/include/channel.h')
| -rw-r--r-- | drivers/staging/unisys/include/channel.h | 114 |
1 files changed, 67 insertions, 47 deletions
diff --git a/drivers/staging/unisys/include/channel.h b/drivers/staging/unisys/include/channel.h index c6c24423a7f0..5af59a5fce61 100644 --- a/drivers/staging/unisys/include/channel.h +++ b/drivers/staging/unisys/include/channel.h @@ -60,15 +60,19 @@ enum channel_clientstate { CHANNELCLI_DISABLED = 1, /* client can see channel but is NOT * allowed to use it unless given TBD * explicit request (should actually be - * < DETACHED) */ + * < DETACHED) + */ CHANNELCLI_ATTACHING = 2, /* legacy EFI client request - * for EFI server to attach */ + * for EFI server to attach + */ CHANNELCLI_ATTACHED = 3, /* idle, but client may want - * to use channel any time */ + * to use channel any time + */ CHANNELCLI_BUSY = 4, /* client either wants to use or is - * using channel */ - CHANNELCLI_OWNED = 5 /* "no worries" state - client can - * access channel anytime */ + * using channel + */ + CHANNELCLI_OWNED = 5 /* "no worries" state - client can */ + /* access channel anytime */ }; static inline const u8 * @@ -116,11 +120,13 @@ ULTRA_CHANNELCLI_STRING(u32 v) /* Values for ULTRA_CHANNEL_PROTOCOL.CliErrorBoot: */ /* throttling invalid boot channel statetransition error due to client - * disabled */ + * disabled + */ #define ULTRA_CLIERRORBOOT_THROTTLEMSG_DISABLED 0x01 /* throttling invalid boot channel statetransition error due to client - * not attached */ + * not attached + */ #define ULTRA_CLIERRORBOOT_THROTTLEMSG_NOTATTACHED 0x02 /* throttling invalid boot channel statetransition error due to busy channel */ @@ -128,24 +134,28 @@ ULTRA_CHANNELCLI_STRING(u32 v) /* Values for ULTRA_CHANNEL_PROTOCOL.CliErrorOS: */ /* throttling invalid guest OS channel statetransition error due to - * client disabled */ + * client disabled + */ #define ULTRA_CLIERROROS_THROTTLEMSG_DISABLED 0x01 /* throttling invalid guest OS channel statetransition error due to - * client not attached */ + * client not attached + */ #define ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED 0x02 /* throttling invalid guest OS channel statetransition error due to - * busy channel */ + * busy channel + */ #define ULTRA_CLIERROROS_THROTTLEMSG_BUSY 0x04 /* Values for ULTRA_CHANNEL_PROTOCOL.Features: This define exists so -* that windows guest can look at the FeatureFlags in the io channel, -* and configure the windows driver to use interrupts or not based on -* this setting. This flag is set in uislib after the -* ULTRA_VHBA_init_channel is called. All feature bits for all -* channels should be defined here. The io channel feature bits are -* defined right here */ + * that windows guest can look at the FeatureFlags in the io channel, + * and configure the windows driver to use interrupts or not based on + * this setting. This flag is set in uislib after the + * ULTRA_VHBA_init_channel is called. All feature bits for all + * channels should be defined here. The io channel feature bits are + * defined right here + */ #define ULTRA_IO_DRIVER_ENABLES_INTS (0x1ULL << 1) #define ULTRA_IO_CHANNEL_IS_POLLING (0x1ULL << 3) #define ULTRA_IO_IOVM_IS_OK_WITH_DRIVER_DISABLING_INTS (0x1ULL << 4) @@ -156,7 +166,7 @@ ULTRA_CHANNELCLI_STRING(u32 v) struct channel_header { u64 signature; /* Signature */ u32 legacy_state; /* DEPRECATED - being replaced by */ - /* / SrvState, CliStateBoot, and CliStateOS below */ + /* SrvState, CliStateBoot, and CliStateOS below */ u32 header_size; /* sizeof(struct channel_header) */ u64 size; /* Total size of this channel in bytes */ u64 features; /* Flags to modify behavior */ @@ -169,25 +179,32 @@ struct channel_header { uuid_le zone_uuid; /* Guid of Channel's zone */ u32 cli_str_offset; /* offset from channel header to * nul-terminated ClientString (0 if - * ClientString not present) */ + * ClientString not present) + */ u32 cli_state_boot; /* CHANNEL_CLIENTSTATE of pre-boot - * EFI client of this channel */ + * EFI client of this channel + */ u32 cmd_state_cli; /* CHANNEL_COMMANDSTATE (overloaded in * Windows drivers, see ServerStateUp, - * ServerStateDown, etc) */ + * ServerStateDown, etc) + */ u32 cli_state_os; /* CHANNEL_CLIENTSTATE of Guest OS - * client of this channel */ + * client of this channel + */ u32 ch_characteristic; /* CHANNEL_CHARACTERISTIC_<xxx> */ u32 cmd_state_srv; /* CHANNEL_COMMANDSTATE (overloaded in * Windows drivers, see ServerStateUp, - * ServerStateDown, etc) */ + * ServerStateDown, etc) + */ u32 srv_state; /* CHANNEL_SERVERSTATE */ u8 cli_error_boot; /* bits to indicate err states for * boot clients, so err messages can - * be throttled */ + * be throttled + */ u8 cli_error_os; /* bits to indicate err states for OS * clients, so err messages can be - * throttled */ + * throttled + */ u8 filler[1]; /* Pad out to 128 byte cacheline */ /* Please add all new single-byte values below here */ u8 recover_channel; @@ -205,29 +222,33 @@ struct signal_queue_header { u64 features; /* Flags to modify behavior */ u64 num_sent; /* Total # of signals placed in this queue */ u64 num_overflows; /* Total # of inserts failed due to - * full queue */ + * full queue + */ u32 signal_size; /* Total size of a signal for this queue */ u32 max_slots; /* Max # of slots in queue, 1 slot is - * always empty */ + * always empty + */ u32 max_signals; /* Max # of signals in queue - * (MaxSignalSlots-1) */ + * (MaxSignalSlots-1) + */ u32 head; /* Queue head signal # */ /* 2nd cache line */ u64 num_received; /* Total # of signals removed from this queue */ - u32 tail; /* Queue tail signal # (on separate - * cache line) */ + u32 tail; /* Queue tail signal */ u32 reserved1; /* Reserved field */ u64 reserved2; /* Reserved field */ u64 client_queue; u64 num_irq_received; /* Total # of Interrupts received. This - * is incremented by the ISR in the - * guest windows driver */ + * is incremented by the ISR in the + * guest windows driver + */ u64 num_empty; /* Number of times that visor_signal_remove - * is called and returned Empty - * Status. */ + * is called and returned Empty Status. + */ u32 errorflags; /* Error bits set during SignalReinit * to denote trouble with client's - * fields */ + * fields + */ u8 filler[12]; /* Pad out to 64 byte cacheline */ } __packed; @@ -272,8 +293,7 @@ spar_check_channel_client(void __iomem *ch, return 0; } } - if (expected_min_bytes > 0) { /* caller wants us to verify - * channel size */ + if (expected_min_bytes > 0) { /* verify channel size */ unsigned long long bytes = readq(&((struct channel_header __iomem *) (ch))->size); @@ -284,8 +304,7 @@ spar_check_channel_client(void __iomem *ch, return 0; } } - if (expected_version > 0) { /* caller wants us to verify - * channel version */ + if (expected_version > 0) { /* verify channel version */ unsigned long ver = readl(&((struct channel_header __iomem *) (ch))->version_id); if (ver != expected_version) { @@ -295,8 +314,7 @@ spar_check_channel_client(void __iomem *ch, return 0; } } - if (expected_signature > 0) { /* caller wants us to verify - * channel signature */ + if (expected_signature > 0) { /* verify channel signature */ unsigned long long sig = readq(&((struct channel_header __iomem *) (ch))->signature); @@ -319,8 +337,7 @@ static inline int spar_check_channel_server(uuid_le typeuuid, char *name, u64 expected_min_bytes, u64 actual_bytes) { - if (expected_min_bytes > 0) /* caller wants us to verify - * channel size */ + if (expected_min_bytes > 0) /* verify channel size */ if (actual_bytes < expected_min_bytes) { pr_err("Channel mismatch on channel=%s(%pUL) field=size expected=0x%-8.8llx actual=0x%-8.8llx\n", name, &typeuuid, expected_min_bytes, @@ -354,7 +371,8 @@ pathname_last_n_nodes(u8 *s, unsigned int n) if (p == s) break; /* should never happen, unless someone * is changing the string while we are - * looking at it!! */ + * looking at it!! + */ if ((*p == '/') || (*p == '\\')) n--; } @@ -395,7 +413,8 @@ spar_channel_client_acquire_os(void __iomem *ch, u8 *id) if (readl(&hdr->cli_state_os) == CHANNELCLI_OWNED) { if (readb(&hdr->cli_error_os) != 0) { /* we are in an error msg throttling state; - * come out of it */ + * come out of it + */ pr_info("%s Channel OS client acquire now successful\n", id); writeb(0, &hdr->cli_error_os); @@ -404,8 +423,9 @@ spar_channel_client_acquire_os(void __iomem *ch, u8 *id) } /* We have to do it the "hard way". We transition to BUSY, - * and can use the channel iff our competitor has not also - * transitioned to BUSY. */ + * and can use the channel iff our competitor has not also + * transitioned to BUSY. + */ if (readl(&hdr->cli_state_os) != CHANNELCLI_ATTACHED) { if ((readb(&hdr->cli_error_os) & ULTRA_CLIERROROS_THROTTLEMSG_NOTATTACHED) == 0) { |