mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 20:22:09 +00:00
[PATCH] RapidIO support: ppc32
Adds PPC32 RIO support. Init code for the MPC85xx RIO ports and glue for the STx GP3 board to use it. Signed-off-by: Matt Porter <mporter@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Matt Porter
Linus Torvalds
parent
fa78cc5179
commit
2b0c28d7f8
@ -1257,6 +1257,14 @@ source "drivers/pci/Kconfig"
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source "drivers/pcmcia/Kconfig"
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config RAPIDIO
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bool "RapidIO support" if MPC8540 || MPC8560
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help
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If you say Y here, the kernel will include drivers and
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infrastructure code to support RapidIO interconnect devices.
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source "drivers/rapidio/Kconfig"
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endmenu
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menu "Advanced setup"
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@ -1,7 +1,7 @@
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#
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# Automatically generated make config: don't edit
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# Linux kernel version: 2.6.11-rc2
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# Wed Jan 26 14:32:58 2005
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# Linux kernel version: 2.6.12-rc4
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# Tue May 24 18:11:04 2005
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#
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CONFIG_MMU=y
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CONFIG_GENERIC_HARDIRQS=y
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@ -11,6 +11,7 @@ CONFIG_HAVE_DEC_LOCK=y
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CONFIG_PPC=y
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CONFIG_PPC32=y
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CONFIG_GENERIC_NVRAM=y
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CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
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#
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# Code maturity level options
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@ -18,6 +19,7 @@ CONFIG_GENERIC_NVRAM=y
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CONFIG_EXPERIMENTAL=y
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CONFIG_CLEAN_COMPILE=y
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CONFIG_BROKEN_ON_SMP=y
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CONFIG_INIT_ENV_ARG_LIMIT=32
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#
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# General setup
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@ -29,7 +31,6 @@ CONFIG_SYSVIPC=y
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# CONFIG_BSD_PROCESS_ACCT is not set
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CONFIG_SYSCTL=y
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# CONFIG_AUDIT is not set
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CONFIG_LOG_BUF_SHIFT=14
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CONFIG_HOTPLUG=y
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CONFIG_KOBJECT_UEVENT=y
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# CONFIG_IKCONFIG is not set
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@ -37,6 +38,9 @@ CONFIG_EMBEDDED=y
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CONFIG_KALLSYMS=y
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# CONFIG_KALLSYMS_ALL is not set
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# CONFIG_KALLSYMS_EXTRA_PASS is not set
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CONFIG_PRINTK=y
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CONFIG_BUG=y
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CONFIG_BASE_FULL=y
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CONFIG_FUTEX=y
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CONFIG_EPOLL=y
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# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
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@ -46,6 +50,7 @@ CONFIG_CC_ALIGN_LABELS=0
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CONFIG_CC_ALIGN_LOOPS=0
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CONFIG_CC_ALIGN_JUMPS=0
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# CONFIG_TINY_SHMEM is not set
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CONFIG_BASE_SMALL=0
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#
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# Loadable module support
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@ -69,9 +74,11 @@ CONFIG_KMOD=y
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CONFIG_E500=y
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CONFIG_BOOKE=y
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CONFIG_FSL_BOOKE=y
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# CONFIG_PHYS_64BIT is not set
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# CONFIG_SPE is not set
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CONFIG_MATH_EMULATION=y
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# CONFIG_CPU_FREQ is not set
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# CONFIG_PM is not set
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CONFIG_85xx=y
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CONFIG_PPC_INDIRECT_PCI_BE=y
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@ -96,6 +103,7 @@ CONFIG_HIGHMEM=y
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CONFIG_BINFMT_ELF=y
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CONFIG_BINFMT_MISC=m
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# CONFIG_CMDLINE_BOOL is not set
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CONFIG_ISA_DMA_API=y
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#
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# Bus options
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@ -104,15 +112,15 @@ CONFIG_PCI=y
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CONFIG_PCI_DOMAINS=y
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# CONFIG_PCI_LEGACY_PROC is not set
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# CONFIG_PCI_NAMES is not set
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# CONFIG_PCI_DEBUG is not set
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#
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# PCCARD (PCMCIA/CardBus) support
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#
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# CONFIG_PCCARD is not set
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#
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# PC-card bridges
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#
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CONFIG_RAPIDIO=y
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CONFIG_RAPIDIO_8_BIT_TRANSPORT=y
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CONFIG_RAPIDIO_DISC_TIMEOUT=30
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#
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# Advanced setup
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@ -152,7 +160,7 @@ CONFIG_PARPORT=m
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CONFIG_PARPORT_PC=m
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# CONFIG_PARPORT_PC_FIFO is not set
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# CONFIG_PARPORT_PC_SUPERIO is not set
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# CONFIG_PARPORT_OTHER is not set
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# CONFIG_PARPORT_GSC is not set
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# CONFIG_PARPORT_1284 is not set
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#
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@ -264,7 +272,6 @@ CONFIG_SCSI_CONSTANTS=y
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# CONFIG_SCSI_BUSLOGIC is not set
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# CONFIG_SCSI_DMX3191D is not set
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# CONFIG_SCSI_EATA is not set
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# CONFIG_SCSI_EATA_PIO is not set
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# CONFIG_SCSI_FUTURE_DOMAIN is not set
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# CONFIG_SCSI_GDTH is not set
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# CONFIG_SCSI_IPS is not set
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@ -274,7 +281,6 @@ CONFIG_SCSI_CONSTANTS=y
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# CONFIG_SCSI_IMM is not set
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# CONFIG_SCSI_SYM53C8XX_2 is not set
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# CONFIG_SCSI_IPR is not set
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# CONFIG_SCSI_QLOGIC_ISP is not set
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# CONFIG_SCSI_QLOGIC_FC is not set
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# CONFIG_SCSI_QLOGIC_1280 is not set
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CONFIG_SCSI_QLA2XXX=m
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@ -283,6 +289,7 @@ CONFIG_SCSI_QLA2XXX=m
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# CONFIG_SCSI_QLA2300 is not set
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# CONFIG_SCSI_QLA2322 is not set
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# CONFIG_SCSI_QLA6312 is not set
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# CONFIG_SCSI_LPFC is not set
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# CONFIG_SCSI_DC395x is not set
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# CONFIG_SCSI_DC390T is not set
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# CONFIG_SCSI_NSP32 is not set
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@ -322,7 +329,6 @@ CONFIG_NET=y
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#
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CONFIG_PACKET=y
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# CONFIG_PACKET_MMAP is not set
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# CONFIG_NETLINK_DEV is not set
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CONFIG_UNIX=y
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# CONFIG_NET_KEY is not set
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CONFIG_INET=y
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@ -431,7 +437,7 @@ CONFIG_IP_NF_NAT_FTP=m
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#
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# Network testing
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#
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# CONFIG_NET_PKTGEN is not set
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CONFIG_NET_PKTGEN=y
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# CONFIG_NETPOLL is not set
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# CONFIG_NET_POLL_CONTROLLER is not set
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# CONFIG_HAMRADIO is not set
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@ -499,6 +505,7 @@ CONFIG_GFAR_NAPI=y
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# Wan interfaces
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#
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# CONFIG_WAN is not set
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CONFIG_RIONET=y
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# CONFIG_FDDI is not set
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# CONFIG_HIPPI is not set
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# CONFIG_PLIP is not set
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@ -535,20 +542,6 @@ CONFIG_INPUT_JOYDEV=m
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CONFIG_INPUT_EVDEV=m
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# CONFIG_INPUT_EVBUG is not set
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#
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# Input I/O drivers
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#
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# CONFIG_GAMEPORT is not set
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CONFIG_SOUND_GAMEPORT=y
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CONFIG_SERIO=y
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CONFIG_SERIO_I8042=y
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CONFIG_SERIO_SERPORT=y
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# CONFIG_SERIO_CT82C710 is not set
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# CONFIG_SERIO_PARKBD is not set
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# CONFIG_SERIO_PCIPS2 is not set
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CONFIG_SERIO_LIBPS2=y
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# CONFIG_SERIO_RAW is not set
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#
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# Input Device Drivers
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#
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@ -566,6 +559,19 @@ CONFIG_MOUSE_PS2=y
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# CONFIG_INPUT_TOUCHSCREEN is not set
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# CONFIG_INPUT_MISC is not set
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#
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# Hardware I/O ports
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#
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CONFIG_SERIO=y
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CONFIG_SERIO_I8042=y
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CONFIG_SERIO_SERPORT=y
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# CONFIG_SERIO_PARKBD is not set
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# CONFIG_SERIO_PCIPS2 is not set
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CONFIG_SERIO_LIBPS2=y
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# CONFIG_SERIO_RAW is not set
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# CONFIG_GAMEPORT is not set
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CONFIG_SOUND_GAMEPORT=y
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#
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# Character devices
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#
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@ -590,6 +596,7 @@ CONFIG_SERIAL_CPM_SCC2=y
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# CONFIG_SERIAL_CPM_SCC4 is not set
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# CONFIG_SERIAL_CPM_SMC1 is not set
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# CONFIG_SERIAL_CPM_SMC2 is not set
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# CONFIG_SERIAL_JSM is not set
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CONFIG_UNIX98_PTYS=y
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CONFIG_LEGACY_PTYS=y
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CONFIG_LEGACY_PTY_COUNT=256
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@ -625,6 +632,11 @@ CONFIG_DRM=m
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# CONFIG_DRM_SIS is not set
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# CONFIG_RAW_DRIVER is not set
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#
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# TPM devices
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#
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# CONFIG_TCG_TPM is not set
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#
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# I2C support
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#
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@ -648,12 +660,12 @@ CONFIG_I2C_ALGOBIT=m
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# CONFIG_I2C_AMD8111 is not set
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# CONFIG_I2C_I801 is not set
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# CONFIG_I2C_I810 is not set
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# CONFIG_I2C_PIIX4 is not set
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# CONFIG_I2C_ISA is not set
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# CONFIG_I2C_MPC is not set
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# CONFIG_I2C_NFORCE2 is not set
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# CONFIG_I2C_PARPORT is not set
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# CONFIG_I2C_PARPORT_LIGHT is not set
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# CONFIG_I2C_PIIX4 is not set
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# CONFIG_I2C_PROSAVAGE is not set
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# CONFIG_I2C_SAVAGE4 is not set
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# CONFIG_SCx200_ACB is not set
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@ -677,7 +689,9 @@ CONFIG_I2C_ALGOBIT=m
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# CONFIG_SENSORS_ASB100 is not set
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# CONFIG_SENSORS_DS1621 is not set
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# CONFIG_SENSORS_FSCHER is not set
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# CONFIG_SENSORS_FSCPOS is not set
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# CONFIG_SENSORS_GL518SM is not set
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# CONFIG_SENSORS_GL520SM is not set
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# CONFIG_SENSORS_IT87 is not set
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# CONFIG_SENSORS_LM63 is not set
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# CONFIG_SENSORS_LM75 is not set
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@ -688,9 +702,11 @@ CONFIG_I2C_ALGOBIT=m
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# CONFIG_SENSORS_LM85 is not set
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# CONFIG_SENSORS_LM87 is not set
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# CONFIG_SENSORS_LM90 is not set
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# CONFIG_SENSORS_LM92 is not set
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# CONFIG_SENSORS_MAX1619 is not set
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# CONFIG_SENSORS_PC87360 is not set
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# CONFIG_SENSORS_SMSC47B397 is not set
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# CONFIG_SENSORS_SIS5595 is not set
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# CONFIG_SENSORS_SMSC47M1 is not set
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# CONFIG_SENSORS_VIA686A is not set
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# CONFIG_SENSORS_W83781D is not set
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@ -700,10 +716,12 @@ CONFIG_I2C_ALGOBIT=m
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#
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# Other I2C Chip support
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#
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# CONFIG_SENSORS_DS1337 is not set
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# CONFIG_SENSORS_EEPROM is not set
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# CONFIG_SENSORS_PCF8574 is not set
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# CONFIG_SENSORS_PCF8591 is not set
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# CONFIG_SENSORS_RTC8564 is not set
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# CONFIG_SENSORS_M41T00 is not set
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# CONFIG_I2C_DEBUG_CORE is not set
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# CONFIG_I2C_DEBUG_ALGO is not set
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# CONFIG_I2C_DEBUG_BUS is not set
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@ -732,7 +750,6 @@ CONFIG_I2C_ALGOBIT=m
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# Graphics support
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#
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# CONFIG_FB is not set
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# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
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#
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# Sound
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@ -752,13 +769,9 @@ CONFIG_SOUND=m
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#
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# USB support
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#
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# CONFIG_USB is not set
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CONFIG_USB_ARCH_HAS_HCD=y
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CONFIG_USB_ARCH_HAS_OHCI=y
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#
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# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support' may also be needed; see USB_STORAGE Help for more information
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#
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# CONFIG_USB is not set
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#
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# USB Gadget Support
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@ -789,6 +802,10 @@ CONFIG_JBD_DEBUG=y
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CONFIG_FS_MBCACHE=y
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# CONFIG_REISERFS_FS is not set
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# CONFIG_JFS_FS is not set
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#
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# XFS support
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#
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# CONFIG_XFS_FS is not set
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# CONFIG_MINIX_FS is not set
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# CONFIG_ROMFS_FS is not set
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@ -859,7 +876,6 @@ CONFIG_NFS_V3=y
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CONFIG_ROOT_NFS=y
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CONFIG_LOCKD=y
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CONFIG_LOCKD_V4=y
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# CONFIG_EXPORTFS is not set
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CONFIG_SUNRPC=y
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# CONFIG_RPCSEC_GSS_KRB5 is not set
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# CONFIG_RPCSEC_GSS_SPKM3 is not set
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@ -942,8 +958,10 @@ CONFIG_ZLIB_INFLATE=m
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#
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# Kernel hacking
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#
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# CONFIG_PRINTK_TIME is not set
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CONFIG_DEBUG_KERNEL=y
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# CONFIG_MAGIC_SYSRQ is not set
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CONFIG_LOG_BUF_SHIFT=14
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# CONFIG_SCHEDSTATS is not set
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# CONFIG_DEBUG_SLAB is not set
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# CONFIG_DEBUG_SPINLOCK is not set
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@ -22,6 +22,7 @@ obj-$(CONFIG_POWER4) += cpu_setup_power4.o
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obj-$(CONFIG_MODULES) += module.o ppc_ksyms.o
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obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-mapping.o
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obj-$(CONFIG_PCI) += pci.o
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obj-$(CONFIG_RAPIDIO) += rio.o
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obj-$(CONFIG_KGDB) += ppc-stub.o
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obj-$(CONFIG_SMP) += smp.o smp-tbsync.o
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obj-$(CONFIG_TAU) += temp.o
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52
arch/ppc/kernel/rio.c
Normal file
52
arch/ppc/kernel/rio.c
Normal file
@ -0,0 +1,52 @@
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/*
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* RapidIO PPC32 support
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*
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* Copyright 2005 MontaVista Software, Inc.
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* Matt Porter <mporter@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/rio.h>
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#include <asm/rio.h>
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/**
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* platform_rio_init - Do platform specific RIO init
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*
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* Any platform specific initialization of RapdIO
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* hardware is done here as well as registration
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* of any active master ports in the system.
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*/
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void __attribute__ ((weak))
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platform_rio_init(void)
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{
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printk(KERN_WARNING "RIO: No platform_rio_init() present\n");
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}
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/**
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* ppc_rio_init - Do PPC32 RIO init
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*
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* Calls platform-specific RIO init code and then calls
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* rio_init_mports() to initialize any master ports that
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* have been registered with the RIO subsystem.
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*/
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static int __init ppc_rio_init(void)
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{
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printk(KERN_INFO "RIO: RapidIO init\n");
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/* Platform specific initialization */
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platform_rio_init();
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/* Enumerate all registered ports */
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rio_init_mports();
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return 0;
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}
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subsys_initcall(ppc_rio_init);
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@ -45,6 +45,8 @@
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#include <mm/mmu_decl.h>
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#include <syslib/ppc85xx_rio.h>
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#include <platforms/85xx/mpc85xx_ads_common.h>
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#ifndef CONFIG_PCI
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@ -189,3 +191,11 @@ mpc85xx_exclude_device(u_char bus, u_char devfn)
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}
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#endif /* CONFIG_PCI */
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#ifdef CONFIG_RAPIDIO
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void platform_rio_init(void)
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{
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/* 512MB RIO LAW at 0xc0000000 */
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mpc85xx_rio_setup(0xc0000000, 0x20000000);
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}
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#endif /* CONFIG_RAPIDIO */
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@ -37,6 +37,7 @@
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#include <linux/module.h>
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#include <linux/fsl_devices.h>
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#include <linux/interrupt.h>
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#include <linux/rio.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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@ -57,6 +58,7 @@
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#include <syslib/cpm2_pic.h>
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#include <syslib/ppc85xx_common.h>
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#include <syslib/ppc85xx_rio.h>
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unsigned char __res[sizeof(bd_t)];
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@ -273,6 +275,18 @@ int mpc85xx_exclude_device(u_char bus, u_char devfn)
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}
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#endif /* CONFIG_PCI */
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#ifdef CONFIG_RAPIDIO
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void
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platform_rio_init(void)
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{
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/*
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* The STx firmware configures the RapidIO Local Access Window
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* at 0xc0000000 with a size of 512MB.
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||||
*/
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mpc85xx_rio_setup(0xc0000000, 0x20000000);
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}
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#endif /* CONFIG_RAPIDIO */
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void __init
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platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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unsigned long r6, unsigned long r7)
|
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|
||||
@ -33,6 +33,7 @@ obj-$(CONFIG_PPC4xx_DMA) += ppc4xx_dma.o
|
||||
obj-$(CONFIG_PPC4xx_EDMA) += ppc4xx_sgdma.o
|
||||
ifeq ($(CONFIG_40x),y)
|
||||
obj-$(CONFIG_PCI) += pci_auto.o ppc405_pci.o
|
||||
obj-$(CONFIG_RAPIDIO) += ppc85xx_rio.o
|
||||
endif
|
||||
endif
|
||||
obj-$(CONFIG_8xx) += m8xx_setup.o ppc8xx_pic.o $(wdt-mpc8xx-y) \
|
||||
|
||||
932
arch/ppc/syslib/ppc85xx_rio.c
Normal file
932
arch/ppc/syslib/ppc85xx_rio.c
Normal file
@ -0,0 +1,932 @@
|
||||
/*
|
||||
* MPC85xx RapidIO support
|
||||
*
|
||||
* Copyright 2005 MontaVista Software, Inc.
|
||||
* Matt Porter <mporter@kernel.crashing.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/config.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/rio.h>
|
||||
#include <linux/rio_drv.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
|
||||
#define RIO_REGS_BASE (CCSRBAR + 0xc0000)
|
||||
#define RIO_ATMU_REGS_OFFSET 0x10c00
|
||||
#define RIO_MSG_REGS_OFFSET 0x11000
|
||||
#define RIO_MAINT_WIN_SIZE 0x400000
|
||||
#define RIO_DBELL_WIN_SIZE 0x1000
|
||||
|
||||
#define RIO_MSG_OMR_MUI 0x00000002
|
||||
#define RIO_MSG_OSR_TE 0x00000080
|
||||
#define RIO_MSG_OSR_QOI 0x00000020
|
||||
#define RIO_MSG_OSR_QFI 0x00000010
|
||||
#define RIO_MSG_OSR_MUB 0x00000004
|
||||
#define RIO_MSG_OSR_EOMI 0x00000002
|
||||
#define RIO_MSG_OSR_QEI 0x00000001
|
||||
|
||||
#define RIO_MSG_IMR_MI 0x00000002
|
||||
#define RIO_MSG_ISR_TE 0x00000080
|
||||
#define RIO_MSG_ISR_QFI 0x00000010
|
||||
#define RIO_MSG_ISR_DIQI 0x00000001
|
||||
|
||||
#define RIO_MSG_DESC_SIZE 32
|
||||
#define RIO_MSG_BUFFER_SIZE 4096
|
||||
#define RIO_MIN_TX_RING_SIZE 2
|
||||
#define RIO_MAX_TX_RING_SIZE 2048
|
||||
#define RIO_MIN_RX_RING_SIZE 2
|
||||
#define RIO_MAX_RX_RING_SIZE 2048
|
||||
|
||||
#define DOORBELL_DMR_DI 0x00000002
|
||||
#define DOORBELL_DSR_TE 0x00000080
|
||||
#define DOORBELL_DSR_QFI 0x00000010
|
||||
#define DOORBELL_DSR_DIQI 0x00000001
|
||||
#define DOORBELL_TID_OFFSET 0x03
|
||||
#define DOORBELL_SID_OFFSET 0x05
|
||||
#define DOORBELL_INFO_OFFSET 0x06
|
||||
|
||||
#define DOORBELL_MESSAGE_SIZE 0x08
|
||||
#define DBELL_SID(x) (*(u8 *)(x + DOORBELL_SID_OFFSET))
|
||||
#define DBELL_TID(x) (*(u8 *)(x + DOORBELL_TID_OFFSET))
|
||||
#define DBELL_INF(x) (*(u16 *)(x + DOORBELL_INFO_OFFSET))
|
||||
|
||||
#define is_power_of_2(x) (((x) & ((x) - 1)) == 0)
|
||||
|
||||
struct rio_atmu_regs {
|
||||
u32 rowtar;
|
||||
u32 pad1;
|
||||
u32 rowbar;
|
||||
u32 pad2;
|
||||
u32 rowar;
|
||||
u32 pad3[3];
|
||||
};
|
||||
|
||||
struct rio_msg_regs {
|
||||
u32 omr;
|
||||
u32 osr;
|
||||
u32 pad1;
|
||||
u32 odqdpar;
|
||||
u32 pad2;
|
||||
u32 osar;
|
||||
u32 odpr;
|
||||
u32 odatr;
|
||||
u32 odcr;
|
||||
u32 pad3;
|
||||
u32 odqepar;
|
||||
u32 pad4[13];
|
||||
u32 imr;
|
||||
u32 isr;
|
||||
u32 pad5;
|
||||
u32 ifqdpar;
|
||||
u32 pad6;
|
||||
u32 ifqepar;
|
||||
u32 pad7[250];
|
||||
u32 dmr;
|
||||
u32 dsr;
|
||||
u32 pad8;
|
||||
u32 dqdpar;
|
||||
u32 pad9;
|
||||
u32 dqepar;
|
||||
u32 pad10[26];
|
||||
u32 pwmr;
|
||||
u32 pwsr;
|
||||
u32 pad11;
|
||||
u32 pwqbar;
|
||||
};
|
||||
|
||||
struct rio_tx_desc {
|
||||
u32 res1;
|
||||
u32 saddr;
|
||||
u32 dport;
|
||||
u32 dattr;
|
||||
u32 res2;
|
||||
u32 res3;
|
||||
u32 dwcnt;
|
||||
u32 res4;
|
||||
};
|
||||
|
||||
static u32 regs_win;
|
||||
static struct rio_atmu_regs *atmu_regs;
|
||||
static struct rio_atmu_regs *maint_atmu_regs;
|
||||
static struct rio_atmu_regs *dbell_atmu_regs;
|
||||
static u32 dbell_win;
|
||||
static u32 maint_win;
|
||||
static struct rio_msg_regs *msg_regs;
|
||||
|
||||
static struct rio_dbell_ring {
|
||||
void *virt;
|
||||
dma_addr_t phys;
|
||||
} dbell_ring;
|
||||
|
||||
static struct rio_msg_tx_ring {
|
||||
void *virt;
|
||||
dma_addr_t phys;
|
||||
void *virt_buffer[RIO_MAX_TX_RING_SIZE];
|
||||
dma_addr_t phys_buffer[RIO_MAX_TX_RING_SIZE];
|
||||
int tx_slot;
|
||||
int size;
|
||||
} msg_tx_ring;
|
||||
|
||||
static struct rio_msg_rx_ring {
|
||||
void *virt;
|
||||
dma_addr_t phys;
|
||||
void *virt_buffer[RIO_MAX_RX_RING_SIZE];
|
||||
int rx_slot;
|
||||
int size;
|
||||
} msg_rx_ring;
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_doorbell_send - Send a MPC85xx doorbell message
|
||||
* @index: ID of RapidIO interface
|
||||
* @destid: Destination ID of target device
|
||||
* @data: 16-bit info field of RapidIO doorbell message
|
||||
*
|
||||
* Sends a MPC85xx doorbell message. Returns %0 on success or
|
||||
* %-EINVAL on failure.
|
||||
*/
|
||||
static int mpc85xx_rio_doorbell_send(int index, u16 destid, u16 data)
|
||||
{
|
||||
pr_debug("mpc85xx_doorbell_send: index %d destid %4.4x data %4.4x\n",
|
||||
index, destid, data);
|
||||
out_be32((void *)&dbell_atmu_regs->rowtar, destid << 22);
|
||||
out_be16((void *)(dbell_win), data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mpc85xx_local_config_read - Generate a MPC85xx local config space read
|
||||
* @index: ID of RapdiIO interface
|
||||
* @offset: Offset into configuration space
|
||||
* @len: Length (in bytes) of the maintenance transaction
|
||||
* @data: Value to be read into
|
||||
*
|
||||
* Generates a MPC85xx local configuration space read. Returns %0 on
|
||||
* success or %-EINVAL on failure.
|
||||
*/
|
||||
static int mpc85xx_local_config_read(int index, u32 offset, int len, u32 * data)
|
||||
{
|
||||
pr_debug("mpc85xx_local_config_read: index %d offset %8.8x\n", index,
|
||||
offset);
|
||||
*data = in_be32((void *)(regs_win + offset));
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mpc85xx_local_config_write - Generate a MPC85xx local config space write
|
||||
* @index: ID of RapdiIO interface
|
||||
* @offset: Offset into configuration space
|
||||
* @len: Length (in bytes) of the maintenance transaction
|
||||
* @data: Value to be written
|
||||
*
|
||||
* Generates a MPC85xx local configuration space write. Returns %0 on
|
||||
* success or %-EINVAL on failure.
|
||||
*/
|
||||
static int mpc85xx_local_config_write(int index, u32 offset, int len, u32 data)
|
||||
{
|
||||
pr_debug
|
||||
("mpc85xx_local_config_write: index %d offset %8.8x data %8.8x\n",
|
||||
index, offset, data);
|
||||
out_be32((void *)(regs_win + offset), data);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_config_read - Generate a MPC85xx read maintenance transaction
|
||||
* @index: ID of RapdiIO interface
|
||||
* @destid: Destination ID of transaction
|
||||
* @hopcount: Number of hops to target device
|
||||
* @offset: Offset into configuration space
|
||||
* @len: Length (in bytes) of the maintenance transaction
|
||||
* @val: Location to be read into
|
||||
*
|
||||
* Generates a MPC85xx read maintenance transaction. Returns %0 on
|
||||
* success or %-EINVAL on failure.
|
||||
*/
|
||||
static int
|
||||
mpc85xx_rio_config_read(int index, u16 destid, u8 hopcount, u32 offset, int len,
|
||||
u32 * val)
|
||||
{
|
||||
u8 *data;
|
||||
|
||||
pr_debug
|
||||
("mpc85xx_rio_config_read: index %d destid %d hopcount %d offset %8.8x len %d\n",
|
||||
index, destid, hopcount, offset, len);
|
||||
out_be32((void *)&maint_atmu_regs->rowtar,
|
||||
(destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
|
||||
|
||||
data = (u8 *) maint_win + offset;
|
||||
switch (len) {
|
||||
case 1:
|
||||
*val = in_8((u8 *) data);
|
||||
break;
|
||||
case 2:
|
||||
*val = in_be16((u16 *) data);
|
||||
break;
|
||||
default:
|
||||
*val = in_be32((u32 *) data);
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_config_write - Generate a MPC85xx write maintenance transaction
|
||||
* @index: ID of RapdiIO interface
|
||||
* @destid: Destination ID of transaction
|
||||
* @hopcount: Number of hops to target device
|
||||
* @offset: Offset into configuration space
|
||||
* @len: Length (in bytes) of the maintenance transaction
|
||||
* @val: Value to be written
|
||||
*
|
||||
* Generates an MPC85xx write maintenance transaction. Returns %0 on
|
||||
* success or %-EINVAL on failure.
|
||||
*/
|
||||
static int
|
||||
mpc85xx_rio_config_write(int index, u16 destid, u8 hopcount, u32 offset,
|
||||
int len, u32 val)
|
||||
{
|
||||
u8 *data;
|
||||
pr_debug
|
||||
("mpc85xx_rio_config_write: index %d destid %d hopcount %d offset %8.8x len %d val %8.8x\n",
|
||||
index, destid, hopcount, offset, len, val);
|
||||
out_be32((void *)&maint_atmu_regs->rowtar,
|
||||
(destid << 22) | (hopcount << 12) | ((offset & ~0x3) >> 9));
|
||||
|
||||
data = (u8 *) maint_win + offset;
|
||||
switch (len) {
|
||||
case 1:
|
||||
out_8((u8 *) data, val);
|
||||
break;
|
||||
case 2:
|
||||
out_be16((u16 *) data, val);
|
||||
break;
|
||||
default:
|
||||
out_be32((u32 *) data, val);
|
||||
break;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* rio_hw_add_outb_message - Add message to the MPC85xx outbound message queue
|
||||
* @mport: Master port with outbound message queue
|
||||
* @rdev: Target of outbound message
|
||||
* @mbox: Outbound mailbox
|
||||
* @buffer: Message to add to outbound queue
|
||||
* @len: Length of message
|
||||
*
|
||||
* Adds the @buffer message to the MPC85xx outbound message queue. Returns
|
||||
* %0 on success or %-EINVAL on failure.
|
||||
*/
|
||||
int
|
||||
rio_hw_add_outb_message(struct rio_mport *mport, struct rio_dev *rdev, int mbox,
|
||||
void *buffer, size_t len)
|
||||
{
|
||||
u32 omr;
|
||||
struct rio_tx_desc *desc =
|
||||
(struct rio_tx_desc *)msg_tx_ring.virt + msg_tx_ring.tx_slot;
|
||||
int ret = 0;
|
||||
|
||||
pr_debug
|
||||
("RIO: rio_hw_add_outb_message(): destid %4.4x mbox %d buffer %8.8x len %8.8x\n",
|
||||
rdev->destid, mbox, (int)buffer, len);
|
||||
|
||||
if ((len < 8) || (len > RIO_MAX_MSG_SIZE)) {
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Copy and clear rest of buffer */
|
||||
memcpy(msg_tx_ring.virt_buffer[msg_tx_ring.tx_slot], buffer, len);
|
||||
if (len < (RIO_MAX_MSG_SIZE - 4))
|
||||
memset((void *)((u32) msg_tx_ring.
|
||||
virt_buffer[msg_tx_ring.tx_slot] + len), 0,
|
||||
RIO_MAX_MSG_SIZE - len);
|
||||
|
||||
/* Set mbox field for message */
|
||||
desc->dport = mbox & 0x3;
|
||||
|
||||
/* Enable EOMI interrupt, set priority, and set destid */
|
||||
desc->dattr = 0x28000000 | (rdev->destid << 2);
|
||||
|
||||
/* Set transfer size aligned to next power of 2 (in double words) */
|
||||
desc->dwcnt = is_power_of_2(len) ? len : 1 << get_bitmask_order(len);
|
||||
|
||||
/* Set snooping and source buffer address */
|
||||
desc->saddr = 0x00000004 | msg_tx_ring.phys_buffer[msg_tx_ring.tx_slot];
|
||||
|
||||
/* Increment enqueue pointer */
|
||||
omr = in_be32((void *)&msg_regs->omr);
|
||||
out_be32((void *)&msg_regs->omr, omr | RIO_MSG_OMR_MUI);
|
||||
|
||||
/* Go to next descriptor */
|
||||
if (++msg_tx_ring.tx_slot == msg_tx_ring.size)
|
||||
msg_tx_ring.tx_slot = 0;
|
||||
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(rio_hw_add_outb_message);
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_tx_handler - MPC85xx outbound message interrupt handler
|
||||
* @irq: Linux interrupt number
|
||||
* @dev_instance: Pointer to interrupt-specific data
|
||||
* @regs: Register context
|
||||
*
|
||||
* Handles outbound message interrupts. Executes a register outbound
|
||||
* mailbox event handler and acks the interrupt occurence.
|
||||
*/
|
||||
static irqreturn_t
|
||||
mpc85xx_rio_tx_handler(int irq, void *dev_instance, struct pt_regs *regs)
|
||||
{
|
||||
int osr;
|
||||
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
||||
|
||||
osr = in_be32((void *)&msg_regs->osr);
|
||||
|
||||
if (osr & RIO_MSG_OSR_TE) {
|
||||
pr_info("RIO: outbound message transmission error\n");
|
||||
out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_TE);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (osr & RIO_MSG_OSR_QOI) {
|
||||
pr_info("RIO: outbound message queue overflow\n");
|
||||
out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_QOI);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (osr & RIO_MSG_OSR_EOMI) {
|
||||
u32 dqp = in_be32((void *)&msg_regs->odqdpar);
|
||||
int slot = (dqp - msg_tx_ring.phys) >> 5;
|
||||
port->outb_msg[0].mcback(port, -1, slot);
|
||||
|
||||
/* Ack the end-of-message interrupt */
|
||||
out_be32((void *)&msg_regs->osr, RIO_MSG_OSR_EOMI);
|
||||
}
|
||||
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/**
|
||||
* rio_open_outb_mbox - Initialize MPC85xx outbound mailbox
|
||||
* @mport: Master port implementing the outbound message unit
|
||||
* @mbox: Mailbox to open
|
||||
* @entries: Number of entries in the outbound mailbox ring
|
||||
*
|
||||
* Initializes buffer ring, request the outbound message interrupt,
|
||||
* and enables the outbound message unit. Returns %0 on success and
|
||||
* %-EINVAL or %-ENOMEM on failure.
|
||||
*/
|
||||
int rio_open_outb_mbox(struct rio_mport *mport, int mbox, int entries)
|
||||
{
|
||||
int i, j, rc = 0;
|
||||
|
||||
if ((entries < RIO_MIN_TX_RING_SIZE) ||
|
||||
(entries > RIO_MAX_TX_RING_SIZE) || (!is_power_of_2(entries))) {
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Initialize shadow copy ring */
|
||||
msg_tx_ring.size = entries;
|
||||
|
||||
for (i = 0; i < msg_tx_ring.size; i++) {
|
||||
if (!
|
||||
(msg_tx_ring.virt_buffer[i] =
|
||||
dma_alloc_coherent(NULL, RIO_MSG_BUFFER_SIZE,
|
||||
&msg_tx_ring.phys_buffer[i],
|
||||
GFP_KERNEL))) {
|
||||
rc = -ENOMEM;
|
||||
for (j = 0; j < msg_tx_ring.size; j++)
|
||||
if (msg_tx_ring.virt_buffer[j])
|
||||
dma_free_coherent(NULL,
|
||||
RIO_MSG_BUFFER_SIZE,
|
||||
msg_tx_ring.
|
||||
virt_buffer[j],
|
||||
msg_tx_ring.
|
||||
phys_buffer[j]);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
/* Initialize outbound message descriptor ring */
|
||||
if (!(msg_tx_ring.virt = dma_alloc_coherent(NULL,
|
||||
msg_tx_ring.size *
|
||||
RIO_MSG_DESC_SIZE,
|
||||
&msg_tx_ring.phys,
|
||||
GFP_KERNEL))) {
|
||||
rc = -ENOMEM;
|
||||
goto out_dma;
|
||||
}
|
||||
memset(msg_tx_ring.virt, 0, msg_tx_ring.size * RIO_MSG_DESC_SIZE);
|
||||
msg_tx_ring.tx_slot = 0;
|
||||
|
||||
/* Point dequeue/enqueue pointers at first entry in ring */
|
||||
out_be32((void *)&msg_regs->odqdpar, msg_tx_ring.phys);
|
||||
out_be32((void *)&msg_regs->odqepar, msg_tx_ring.phys);
|
||||
|
||||
/* Configure for snooping */
|
||||
out_be32((void *)&msg_regs->osar, 0x00000004);
|
||||
|
||||
/* Clear interrupt status */
|
||||
out_be32((void *)&msg_regs->osr, 0x000000b3);
|
||||
|
||||
/* Hook up outbound message handler */
|
||||
if ((rc =
|
||||
request_irq(MPC85xx_IRQ_RIO_TX, mpc85xx_rio_tx_handler, 0,
|
||||
"msg_tx", (void *)mport)) < 0)
|
||||
goto out_irq;
|
||||
|
||||
/*
|
||||
* Configure outbound message unit
|
||||
* Snooping
|
||||
* Interrupts (all enabled, except QEIE)
|
||||
* Chaining mode
|
||||
* Disable
|
||||
*/
|
||||
out_be32((void *)&msg_regs->omr, 0x00100220);
|
||||
|
||||
/* Set number of entries */
|
||||
out_be32((void *)&msg_regs->omr,
|
||||
in_be32((void *)&msg_regs->omr) |
|
||||
((get_bitmask_order(entries) - 2) << 12));
|
||||
|
||||
/* Now enable the unit */
|
||||
out_be32((void *)&msg_regs->omr, in_be32((void *)&msg_regs->omr) | 0x1);
|
||||
|
||||
out:
|
||||
return rc;
|
||||
|
||||
out_irq:
|
||||
dma_free_coherent(NULL, msg_tx_ring.size * RIO_MSG_DESC_SIZE,
|
||||
msg_tx_ring.virt, msg_tx_ring.phys);
|
||||
|
||||
out_dma:
|
||||
for (i = 0; i < msg_tx_ring.size; i++)
|
||||
dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
|
||||
msg_tx_ring.virt_buffer[i],
|
||||
msg_tx_ring.phys_buffer[i]);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* rio_close_outb_mbox - Shut down MPC85xx outbound mailbox
|
||||
* @mport: Master port implementing the outbound message unit
|
||||
* @mbox: Mailbox to close
|
||||
*
|
||||
* Disables the outbound message unit, free all buffers, and
|
||||
* frees the outbound message interrupt.
|
||||
*/
|
||||
void rio_close_outb_mbox(struct rio_mport *mport, int mbox)
|
||||
{
|
||||
/* Disable inbound message unit */
|
||||
out_be32((void *)&msg_regs->omr, 0);
|
||||
|
||||
/* Free ring */
|
||||
dma_free_coherent(NULL, msg_tx_ring.size * RIO_MSG_DESC_SIZE,
|
||||
msg_tx_ring.virt, msg_tx_ring.phys);
|
||||
|
||||
/* Free interrupt */
|
||||
free_irq(MPC85xx_IRQ_RIO_TX, (void *)mport);
|
||||
}
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_rx_handler - MPC85xx inbound message interrupt handler
|
||||
* @irq: Linux interrupt number
|
||||
* @dev_instance: Pointer to interrupt-specific data
|
||||
* @regs: Register context
|
||||
*
|
||||
* Handles inbound message interrupts. Executes a registered inbound
|
||||
* mailbox event handler and acks the interrupt occurence.
|
||||
*/
|
||||
static irqreturn_t
|
||||
mpc85xx_rio_rx_handler(int irq, void *dev_instance, struct pt_regs *regs)
|
||||
{
|
||||
int isr;
|
||||
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
||||
|
||||
isr = in_be32((void *)&msg_regs->isr);
|
||||
|
||||
if (isr & RIO_MSG_ISR_TE) {
|
||||
pr_info("RIO: inbound message reception error\n");
|
||||
out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_TE);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* XXX Need to check/dispatch until queue empty */
|
||||
if (isr & RIO_MSG_ISR_DIQI) {
|
||||
/*
|
||||
* We implement *only* mailbox 0, but can receive messages
|
||||
* for any mailbox/letter to that mailbox destination. So,
|
||||
* make the callback with an unknown/invalid mailbox number
|
||||
* argument.
|
||||
*/
|
||||
port->inb_msg[0].mcback(port, -1, -1);
|
||||
|
||||
/* Ack the queueing interrupt */
|
||||
out_be32((void *)&msg_regs->isr, RIO_MSG_ISR_DIQI);
|
||||
}
|
||||
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/**
|
||||
* rio_open_inb_mbox - Initialize MPC85xx inbound mailbox
|
||||
* @mport: Master port implementing the inbound message unit
|
||||
* @mbox: Mailbox to open
|
||||
* @entries: Number of entries in the inbound mailbox ring
|
||||
*
|
||||
* Initializes buffer ring, request the inbound message interrupt,
|
||||
* and enables the inbound message unit. Returns %0 on success
|
||||
* and %-EINVAL or %-ENOMEM on failure.
|
||||
*/
|
||||
int rio_open_inb_mbox(struct rio_mport *mport, int mbox, int entries)
|
||||
{
|
||||
int i, rc = 0;
|
||||
|
||||
if ((entries < RIO_MIN_RX_RING_SIZE) ||
|
||||
(entries > RIO_MAX_RX_RING_SIZE) || (!is_power_of_2(entries))) {
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Initialize client buffer ring */
|
||||
msg_rx_ring.size = entries;
|
||||
msg_rx_ring.rx_slot = 0;
|
||||
for (i = 0; i < msg_rx_ring.size; i++)
|
||||
msg_rx_ring.virt_buffer[i] = NULL;
|
||||
|
||||
/* Initialize inbound message ring */
|
||||
if (!(msg_rx_ring.virt = dma_alloc_coherent(NULL,
|
||||
msg_rx_ring.size *
|
||||
RIO_MAX_MSG_SIZE,
|
||||
&msg_rx_ring.phys,
|
||||
GFP_KERNEL))) {
|
||||
rc = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Point dequeue/enqueue pointers at first entry in ring */
|
||||
out_be32((void *)&msg_regs->ifqdpar, (u32) msg_rx_ring.phys);
|
||||
out_be32((void *)&msg_regs->ifqepar, (u32) msg_rx_ring.phys);
|
||||
|
||||
/* Clear interrupt status */
|
||||
out_be32((void *)&msg_regs->isr, 0x00000091);
|
||||
|
||||
/* Hook up inbound message handler */
|
||||
if ((rc =
|
||||
request_irq(MPC85xx_IRQ_RIO_RX, mpc85xx_rio_rx_handler, 0,
|
||||
"msg_rx", (void *)mport)) < 0) {
|
||||
dma_free_coherent(NULL, RIO_MSG_BUFFER_SIZE,
|
||||
msg_tx_ring.virt_buffer[i],
|
||||
msg_tx_ring.phys_buffer[i]);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Configure inbound message unit:
|
||||
* Snooping
|
||||
* 4KB max message size
|
||||
* Unmask all interrupt sources
|
||||
* Disable
|
||||
*/
|
||||
out_be32((void *)&msg_regs->imr, 0x001b0060);
|
||||
|
||||
/* Set number of queue entries */
|
||||
out_be32((void *)&msg_regs->imr,
|
||||
in_be32((void *)&msg_regs->imr) |
|
||||
((get_bitmask_order(entries) - 2) << 12));
|
||||
|
||||
/* Now enable the unit */
|
||||
out_be32((void *)&msg_regs->imr, in_be32((void *)&msg_regs->imr) | 0x1);
|
||||
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* rio_close_inb_mbox - Shut down MPC85xx inbound mailbox
|
||||
* @mport: Master port implementing the inbound message unit
|
||||
* @mbox: Mailbox to close
|
||||
*
|
||||
* Disables the inbound message unit, free all buffers, and
|
||||
* frees the inbound message interrupt.
|
||||
*/
|
||||
void rio_close_inb_mbox(struct rio_mport *mport, int mbox)
|
||||
{
|
||||
/* Disable inbound message unit */
|
||||
out_be32((void *)&msg_regs->imr, 0);
|
||||
|
||||
/* Free ring */
|
||||
dma_free_coherent(NULL, msg_rx_ring.size * RIO_MAX_MSG_SIZE,
|
||||
msg_rx_ring.virt, msg_rx_ring.phys);
|
||||
|
||||
/* Free interrupt */
|
||||
free_irq(MPC85xx_IRQ_RIO_RX, (void *)mport);
|
||||
}
|
||||
|
||||
/**
|
||||
* rio_hw_add_inb_buffer - Add buffer to the MPC85xx inbound message queue
|
||||
* @mport: Master port implementing the inbound message unit
|
||||
* @mbox: Inbound mailbox number
|
||||
* @buf: Buffer to add to inbound queue
|
||||
*
|
||||
* Adds the @buf buffer to the MPC85xx inbound message queue. Returns
|
||||
* %0 on success or %-EINVAL on failure.
|
||||
*/
|
||||
int rio_hw_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf)
|
||||
{
|
||||
int rc = 0;
|
||||
|
||||
pr_debug("RIO: rio_hw_add_inb_buffer(), msg_rx_ring.rx_slot %d\n",
|
||||
msg_rx_ring.rx_slot);
|
||||
|
||||
if (msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot]) {
|
||||
printk(KERN_ERR
|
||||
"RIO: error adding inbound buffer %d, buffer exists\n",
|
||||
msg_rx_ring.rx_slot);
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
msg_rx_ring.virt_buffer[msg_rx_ring.rx_slot] = buf;
|
||||
if (++msg_rx_ring.rx_slot == msg_rx_ring.size)
|
||||
msg_rx_ring.rx_slot = 0;
|
||||
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(rio_hw_add_inb_buffer);
|
||||
|
||||
/**
|
||||
* rio_hw_get_inb_message - Fetch inbound message from the MPC85xx message unit
|
||||
* @mport: Master port implementing the inbound message unit
|
||||
* @mbox: Inbound mailbox number
|
||||
*
|
||||
* Gets the next available inbound message from the inbound message queue.
|
||||
* A pointer to the message is returned on success or NULL on failure.
|
||||
*/
|
||||
void *rio_hw_get_inb_message(struct rio_mport *mport, int mbox)
|
||||
{
|
||||
u32 imr;
|
||||
u32 phys_buf, virt_buf;
|
||||
void *buf = NULL;
|
||||
int buf_idx;
|
||||
|
||||
phys_buf = in_be32((void *)&msg_regs->ifqdpar);
|
||||
|
||||
/* If no more messages, then bail out */
|
||||
if (phys_buf == in_be32((void *)&msg_regs->ifqepar))
|
||||
goto out2;
|
||||
|
||||
virt_buf = (u32) msg_rx_ring.virt + (phys_buf - msg_rx_ring.phys);
|
||||
buf_idx = (phys_buf - msg_rx_ring.phys) / RIO_MAX_MSG_SIZE;
|
||||
buf = msg_rx_ring.virt_buffer[buf_idx];
|
||||
|
||||
if (!buf) {
|
||||
printk(KERN_ERR
|
||||
"RIO: inbound message copy failed, no buffers\n");
|
||||
goto out1;
|
||||
}
|
||||
|
||||
/* Copy max message size, caller is expected to allocate that big */
|
||||
memcpy(buf, (void *)virt_buf, RIO_MAX_MSG_SIZE);
|
||||
|
||||
/* Clear the available buffer */
|
||||
msg_rx_ring.virt_buffer[buf_idx] = NULL;
|
||||
|
||||
out1:
|
||||
imr = in_be32((void *)&msg_regs->imr);
|
||||
out_be32((void *)&msg_regs->imr, imr | RIO_MSG_IMR_MI);
|
||||
|
||||
out2:
|
||||
return buf;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(rio_hw_get_inb_message);
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_dbell_handler - MPC85xx doorbell interrupt handler
|
||||
* @irq: Linux interrupt number
|
||||
* @dev_instance: Pointer to interrupt-specific data
|
||||
* @regs: Register context
|
||||
*
|
||||
* Handles doorbell interrupts. Parses a list of registered
|
||||
* doorbell event handlers and executes a matching event handler.
|
||||
*/
|
||||
static irqreturn_t
|
||||
mpc85xx_rio_dbell_handler(int irq, void *dev_instance, struct pt_regs *regs)
|
||||
{
|
||||
int dsr;
|
||||
struct rio_mport *port = (struct rio_mport *)dev_instance;
|
||||
|
||||
dsr = in_be32((void *)&msg_regs->dsr);
|
||||
|
||||
if (dsr & DOORBELL_DSR_TE) {
|
||||
pr_info("RIO: doorbell reception error\n");
|
||||
out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_TE);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (dsr & DOORBELL_DSR_QFI) {
|
||||
pr_info("RIO: doorbell queue full\n");
|
||||
out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_QFI);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* XXX Need to check/dispatch until queue empty */
|
||||
if (dsr & DOORBELL_DSR_DIQI) {
|
||||
u32 dmsg =
|
||||
(u32) dbell_ring.virt +
|
||||
(in_be32((void *)&msg_regs->dqdpar) & 0xfff);
|
||||
u32 dmr;
|
||||
struct rio_dbell *dbell;
|
||||
int found = 0;
|
||||
|
||||
pr_debug
|
||||
("RIO: processing doorbell, sid %2.2x tid %2.2x info %4.4x\n",
|
||||
DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
|
||||
|
||||
list_for_each_entry(dbell, &port->dbells, node) {
|
||||
if ((dbell->res->start <= DBELL_INF(dmsg)) &&
|
||||
(dbell->res->end >= DBELL_INF(dmsg))) {
|
||||
found = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (found) {
|
||||
dbell->dinb(port, DBELL_SID(dmsg), DBELL_TID(dmsg),
|
||||
DBELL_INF(dmsg));
|
||||
} else {
|
||||
pr_debug
|
||||
("RIO: spurious doorbell, sid %2.2x tid %2.2x info %4.4x\n",
|
||||
DBELL_SID(dmsg), DBELL_TID(dmsg), DBELL_INF(dmsg));
|
||||
}
|
||||
dmr = in_be32((void *)&msg_regs->dmr);
|
||||
out_be32((void *)&msg_regs->dmr, dmr | DOORBELL_DMR_DI);
|
||||
out_be32((void *)&msg_regs->dsr, DOORBELL_DSR_DIQI);
|
||||
}
|
||||
|
||||
out:
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_doorbell_init - MPC85xx doorbell interface init
|
||||
* @mport: Master port implementing the inbound doorbell unit
|
||||
*
|
||||
* Initializes doorbell unit hardware and inbound DMA buffer
|
||||
* ring. Called from mpc85xx_rio_setup(). Returns %0 on success
|
||||
* or %-ENOMEM on failure.
|
||||
*/
|
||||
static int mpc85xx_rio_doorbell_init(struct rio_mport *mport)
|
||||
{
|
||||
int rc = 0;
|
||||
|
||||
/* Map outbound doorbell window immediately after maintenance window */
|
||||
if (!(dbell_win =
|
||||
(u32) ioremap(mport->iores.start + RIO_MAINT_WIN_SIZE,
|
||||
RIO_DBELL_WIN_SIZE))) {
|
||||
printk(KERN_ERR
|
||||
"RIO: unable to map outbound doorbell window\n");
|
||||
rc = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Initialize inbound doorbells */
|
||||
if (!(dbell_ring.virt = dma_alloc_coherent(NULL,
|
||||
512 * DOORBELL_MESSAGE_SIZE,
|
||||
&dbell_ring.phys,
|
||||
GFP_KERNEL))) {
|
||||
printk(KERN_ERR "RIO: unable allocate inbound doorbell ring\n");
|
||||
rc = -ENOMEM;
|
||||
iounmap((void *)dbell_win);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Point dequeue/enqueue pointers at first entry in ring */
|
||||
out_be32((void *)&msg_regs->dqdpar, (u32) dbell_ring.phys);
|
||||
out_be32((void *)&msg_regs->dqepar, (u32) dbell_ring.phys);
|
||||
|
||||
/* Clear interrupt status */
|
||||
out_be32((void *)&msg_regs->dsr, 0x00000091);
|
||||
|
||||
/* Hook up doorbell handler */
|
||||
if ((rc =
|
||||
request_irq(MPC85xx_IRQ_RIO_BELL, mpc85xx_rio_dbell_handler, 0,
|
||||
"dbell_rx", (void *)mport) < 0)) {
|
||||
iounmap((void *)dbell_win);
|
||||
dma_free_coherent(NULL, 512 * DOORBELL_MESSAGE_SIZE,
|
||||
dbell_ring.virt, dbell_ring.phys);
|
||||
printk(KERN_ERR
|
||||
"MPC85xx RIO: unable to request inbound doorbell irq");
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Configure doorbells for snooping, 512 entries, and enable */
|
||||
out_be32((void *)&msg_regs->dmr, 0x00108161);
|
||||
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
static char *cmdline = NULL;
|
||||
|
||||
static int mpc85xx_rio_get_hdid(int index)
|
||||
{
|
||||
/* XXX Need to parse multiple entries in some format */
|
||||
if (!cmdline)
|
||||
return -1;
|
||||
|
||||
return simple_strtol(cmdline, NULL, 0);
|
||||
}
|
||||
|
||||
static int mpc85xx_rio_get_cmdline(char *s)
|
||||
{
|
||||
if (!s)
|
||||
return 0;
|
||||
|
||||
cmdline = s;
|
||||
return 1;
|
||||
}
|
||||
|
||||
__setup("riohdid=", mpc85xx_rio_get_cmdline);
|
||||
|
||||
/**
|
||||
* mpc85xx_rio_setup - Setup MPC85xx RapidIO interface
|
||||
* @law_start: Starting physical address of RapidIO LAW
|
||||
* @law_size: Size of RapidIO LAW
|
||||
*
|
||||
* Initializes MPC85xx RapidIO hardware interface, configures
|
||||
* master port with system-specific info, and registers the
|
||||
* master port with the RapidIO subsystem.
|
||||
*/
|
||||
void mpc85xx_rio_setup(int law_start, int law_size)
|
||||
{
|
||||
struct rio_ops *ops;
|
||||
struct rio_mport *port;
|
||||
|
||||
ops = kmalloc(sizeof(struct rio_ops), GFP_KERNEL);
|
||||
ops->lcread = mpc85xx_local_config_read;
|
||||
ops->lcwrite = mpc85xx_local_config_write;
|
||||
ops->cread = mpc85xx_rio_config_read;
|
||||
ops->cwrite = mpc85xx_rio_config_write;
|
||||
ops->dsend = mpc85xx_rio_doorbell_send;
|
||||
|
||||
port = kmalloc(sizeof(struct rio_mport), GFP_KERNEL);
|
||||
port->id = 0;
|
||||
port->index = 0;
|
||||
INIT_LIST_HEAD(&port->dbells);
|
||||
port->iores.start = law_start;
|
||||
port->iores.end = law_start + law_size;
|
||||
port->iores.flags = IORESOURCE_MEM;
|
||||
|
||||
rio_init_dbell_res(&port->riores[RIO_DOORBELL_RESOURCE], 0, 0xffff);
|
||||
rio_init_mbox_res(&port->riores[RIO_INB_MBOX_RESOURCE], 0, 0);
|
||||
rio_init_mbox_res(&port->riores[RIO_OUTB_MBOX_RESOURCE], 0, 0);
|
||||
strcpy(port->name, "RIO0 mport");
|
||||
|
||||
port->ops = ops;
|
||||
port->host_deviceid = mpc85xx_rio_get_hdid(port->id);
|
||||
|
||||
rio_register_mport(port);
|
||||
|
||||
regs_win = (u32) ioremap(RIO_REGS_BASE, 0x20000);
|
||||
atmu_regs = (struct rio_atmu_regs *)(regs_win + RIO_ATMU_REGS_OFFSET);
|
||||
maint_atmu_regs = atmu_regs + 1;
|
||||
dbell_atmu_regs = atmu_regs + 2;
|
||||
msg_regs = (struct rio_msg_regs *)(regs_win + RIO_MSG_REGS_OFFSET);
|
||||
|
||||
/* Configure maintenance transaction window */
|
||||
out_be32((void *)&maint_atmu_regs->rowbar, 0x000c0000);
|
||||
out_be32((void *)&maint_atmu_regs->rowar, 0x80077015);
|
||||
|
||||
maint_win = (u32) ioremap(law_start, RIO_MAINT_WIN_SIZE);
|
||||
|
||||
/* Configure outbound doorbell window */
|
||||
out_be32((void *)&dbell_atmu_regs->rowbar, 0x000c0400);
|
||||
out_be32((void *)&dbell_atmu_regs->rowar, 0x8004200b);
|
||||
mpc85xx_rio_doorbell_init(port);
|
||||
}
|
||||
21
arch/ppc/syslib/ppc85xx_rio.h
Normal file
21
arch/ppc/syslib/ppc85xx_rio.h
Normal file
@ -0,0 +1,21 @@
|
||||
/*
|
||||
* MPC85xx RapidIO definitions
|
||||
*
|
||||
* Copyright 2005 MontaVista Software, Inc.
|
||||
* Matt Porter <mporter@kernel.crashing.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*/
|
||||
|
||||
#ifndef __PPC_SYSLIB_PPC85XX_RIO_H
|
||||
#define __PPC_SYSLIB_PPC85XX_RIO_H
|
||||
|
||||
#include <linux/config.h>
|
||||
#include <linux/init.h>
|
||||
|
||||
extern void mpc85xx_rio_setup(int law_start, int law_size);
|
||||
|
||||
#endif /* __PPC_SYSLIB_PPC85XX_RIO_H */
|
||||
18
include/asm-ppc/rio.h
Normal file
18
include/asm-ppc/rio.h
Normal file
@ -0,0 +1,18 @@
|
||||
/*
|
||||
* RapidIO architecture support
|
||||
*
|
||||
* Copyright 2005 MontaVista Software, Inc.
|
||||
* Matt Porter <mporter@kernel.crashing.org>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify it
|
||||
* under the terms of the GNU General Public License as published by the
|
||||
* Free Software Foundation; either version 2 of the License, or (at your
|
||||
* option) any later version.
|
||||
*/
|
||||
|
||||
#ifndef ASM_PPC_RIO_H
|
||||
#define ASM_PPC_RIO_H
|
||||
|
||||
extern void platform_rio_init(void);
|
||||
|
||||
#endif /* ASM_PPC_RIO_H */
|
||||
Loading…
Reference in New Issue
Block a user