#ifndef _IPATH_KERNEL_H #define _IPATH_KERNEL_H /* * Copyright (c) 2006 QLogic, Inc. All rights reserved. * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* * This header file is the base header file for infinipath kernel code * ipath_user.h serves a similar purpose for user code. */ #include #include #include "ipath_common.h" #include "ipath_debug.h" #include "ipath_registers.h" /* only s/w major version of InfiniPath we can handle */ #define IPATH_CHIP_VERS_MAJ 2U /* don't care about this except printing */ #define IPATH_CHIP_VERS_MIN 0U /* temporary, maybe always */ extern struct infinipath_stats ipath_stats; #define IPATH_CHIP_SWVERSION IPATH_CHIP_VERS_MAJ struct ipath_portdata { void **port_rcvegrbuf; dma_addr_t *port_rcvegrbuf_phys; /* rcvhdrq base, needs mmap before useful */ void *port_rcvhdrq; /* kernel virtual address where hdrqtail is updated */ u64 *port_rcvhdrtail_kvaddr; /* page * used for uaddr */ struct page *port_rcvhdrtail_pagep; /* * temp buffer for expected send setup, allocated at open, instead * of each setup call */ void *port_tid_pg_list; /* when waiting for rcv or pioavail */ wait_queue_head_t port_wait; /* * rcvegr bufs base, physical, must fit * in 44 bits so 32 bit programs mmap64 44 bit works) */ dma_addr_t port_rcvegr_phys; /* mmap of hdrq, must fit in 44 bits */ dma_addr_t port_rcvhdrq_phys; /* * the actual user address that we ipath_mlock'ed, so we can * ipath_munlock it at close */ unsigned long port_rcvhdrtail_uaddr; /* * number of opens on this instance (0 or 1; ignoring forks, dup, * etc. for now) */ int port_cnt; /* * how much space to leave at start of eager TID entries for * protocol use, on each TID */ /* instead of calculating it */ unsigned port_port; /* chip offset of PIO buffers for this port */ u32 port_piobufs; /* how many alloc_pages() chunks in port_rcvegrbuf_pages */ u32 port_rcvegrbuf_chunks; /* how many egrbufs per chunk */ u32 port_rcvegrbufs_perchunk; /* order for port_rcvegrbuf_pages */ size_t port_rcvegrbuf_size; /* rcvhdrq size (for freeing) */ size_t port_rcvhdrq_size; /* next expected TID to check when looking for free */ u32 port_tidcursor; /* next expected TID to check */ unsigned long port_flag; /* WAIT_RCV that timed out, no interrupt */ u32 port_rcvwait_to; /* WAIT_PIO that timed out, no interrupt */ u32 port_piowait_to; /* WAIT_RCV already happened, no wait */ u32 port_rcvnowait; /* WAIT_PIO already happened, no wait */ u32 port_pionowait; /* total number of rcvhdrqfull errors */ u32 port_hdrqfull; /* pid of process using this port */ pid_t port_pid; /* same size as task_struct .comm[] */ char port_comm[16]; /* pkeys set by this use of this port */ u16 port_pkeys[4]; /* so file ops can get at unit */ struct ipath_devdata *port_dd; }; struct sk_buff; /* * control information for layered drivers */ struct _ipath_layer { void *l_arg; }; /* Verbs layer interface */ struct _verbs_layer { void *l_arg; struct timer_list l_timer; }; struct ipath_devdata { struct list_head ipath_list; struct ipath_kregs const *ipath_kregs; struct ipath_cregs const *ipath_cregs; /* mem-mapped pointer to base of chip regs */ u64 __iomem *ipath_kregbase; /* end of mem-mapped chip space; range checking */ u64 __iomem *ipath_kregend; /* physical address of chip for io_remap, etc. */ unsigned long ipath_physaddr; /* base of memory alloced for ipath_kregbase, for free */ u64 *ipath_kregalloc; /* * virtual address where port0 rcvhdrqtail updated for this unit. * only written to by the chip, not the driver. */ volatile __le64 *ipath_hdrqtailptr; /* ipath_cfgports pointers */ struct ipath_portdata **ipath_pd; /* sk_buffs used by port 0 eager receive queue */ struct sk_buff **ipath_port0_skbs; /* kvirt address of 1st 2k pio buffer */ void __iomem *ipath_pio2kbase; /* kvirt address of 1st 4k pio buffer */ void __iomem *ipath_pio4kbase; /* * points to area where PIOavail registers will be DMA'ed. * Has to be on a page of it's own, because the page will be * mapped into user program space. This copy is *ONLY* ever * written by DMA, not by the driver! Need a copy per device * when we get to multiple devices */ volatile __le64 *ipath_pioavailregs_dma; /* physical address where updates occur */ dma_addr_t ipath_pioavailregs_phys; struct _ipath_layer ipath_layer; /* setup intr */ int (*ipath_f_intrsetup)(struct ipath_devdata *); /* setup on-chip bus config */ int (*ipath_f_bus)(struct ipath_devdata *, struct pci_dev *); /* hard reset chip */ int (*ipath_f_reset)(struct ipath_devdata *); int (*ipath_f_get_boardname)(struct ipath_devdata *, char *, size_t); void (*ipath_f_init_hwerrors)(struct ipath_devdata *); void (*ipath_f_handle_hwerrors)(struct ipath_devdata *, char *, size_t); void (*ipath_f_quiet_serdes)(struct ipath_devdata *); int (*ipath_f_bringup_serdes)(struct ipath_devdata *); int (*ipath_f_early_init)(struct ipath_devdata *); void (*ipath_f_clear_tids)(struct ipath_devdata *, unsigned); void (*ipath_f_put_tid)(struct ipath_devdata *, u64 __iomem*, u32, unsigned long); void (*ipath_f_tidtemplate)(struct ipath_devdata *); void (*ipath_f_cleanup)(struct ipath_devdata *); void (*ipath_f_setextled)(struct ipath_devdata *, u64, u64); /* fill out chip-specific fields */ int (*ipath_f_get_base_info)(struct ipath_portdata *, void *); struct _verbs_layer verbs_layer; /* total dwords sent (summed from counter) */ u64 ipath_sword; /* total dwords rcvd (summed from counter) */ u64 ipath_rword; /* total packets sent (summed from counter) */ u64 ipath_spkts; /* total packets rcvd (summed from counter) */ u64 ipath_rpkts; /* ipath_statusp initially points to this. */ u64 _ipath_status; /* GUID for this interface, in network order */ __be64 ipath_guid; /* * aggregrate of error bits reported since last cleared, for * limiting of error reporting */ ipath_err_t ipath_lasterror; /* * aggregrate of error bits reported since last cleared, for * limiting of hwerror reporting */ ipath_err_t ipath_lasthwerror; /* * errors masked because they occur too fast, also includes errors * that are always ignored (ipath_ignorederrs) */ ipath_err_t ipath_maskederrs; /* time in jiffies at which to re-enable maskederrs */ unsigned long ipath_unmasktime; /* * errors always ignored (masked), at least for a given * chip/device, because they are wrong or not useful */ ipath_err_t ipath_ignorederrs; /* count of egrfull errors, combined for all ports */ u64 ipath_last_tidfull; /* for ipath_qcheck() */ u64 ipath_lastport0rcv_cnt; /* template for writing TIDs */ u64 ipath_tidtemplate; /* value to write to free TIDs */ u64 ipath_tidinvalid; /* PE-800 rcv interrupt setup */ u64 ipath_rhdrhead_intr_off; /* size of memory at ipath_kregbase */ u32 ipath_kregsize; /* number of registers used for pioavail */ u32 ipath_pioavregs; /* IPATH_POLL, etc. */ u32 ipath_flags; /* ipath_flags sma is waiting for */ u32 ipath_sma_state_wanted; /* last buffer for user use, first buf for kernel use is this * index. */ u32 ipath_lastport_piobuf; /* is a stats timer active */ u32 ipath_stats_timer_active; /* dwords sent read from counter */ u32 ipath_lastsword; /* dwords received read from counter */ u32 ipath_lastrword; /* sent packets read from counter */ u32 ipath_lastspkts; /* received packets read from counter */ u32 ipath_lastrpkts; /* pio bufs allocated per port */ u32 ipath_pbufsport; /* * number of ports configured as max; zero is set to number chip * supports, less gives more pio bufs/port, etc. */ u32 ipath_cfgports; /* port0 rcvhdrq head offset */ u32 ipath_port0head; /* count of port 0 hdrqfull errors */ u32 ipath_p0_hdrqfull; /* * (*cfgports) used to suppress multiple instances of same * port staying stuck at same point */ u32 *ipath_lastrcvhdrqtails; /* * (*cfgports) used to suppress multiple instances of same * port staying stuck at same point */ u32 *ipath_lastegrheads; /* * index of last piobuffer we used. Speeds up searching, by * starting at this point. Doesn't matter if multiple cpu's use and * update, last updater is only write that matters. Whenever it * wraps, we update shadow copies. Need a copy per device when we * get to multiple devices */ u32 ipath_lastpioindex; /* max length of freezemsg */ u32 ipath_freezelen; /* * consecutive times we wanted a PIO buffer but were unable to * get one */ u32 ipath_consec_nopiobuf; /* * hint that we should update ipath_pioavailshadow before * looking for a PIO buffer */ u32 ipath_upd_pio_shadow; /* so we can rewrite it after a chip reset */ u32 ipath_pcibar0; /* so we can rewrite it after a chip reset */ u32 ipath_pcibar1; /* sequential tries for SMA send and no bufs */ u32 ipath_nosma_bufs; /* duration (seconds) ipath_nosma_bufs set */ u32 ipath_nosma_secs; /* HT/PCI Vendor ID (here for NodeInfo) */ u16 ipath_vendorid; /* HT/PCI Device ID (here for NodeInfo) */ u16 ipath_deviceid; /* offset in HT config space of slave/primary interface block */ u8 ipath_ht_slave_off; /* for write combining settings */ unsigned long ipath_wc_cookie; /* ref count for each pkey */ atomic_t ipath_pkeyrefs[4]; /* shadow copy of all exptids physaddr; used only by funcsim */ u64 *ipath_tidsimshadow; /* shadow copy of struct page *'s for exp tid pages */ struct page **ipath_pageshadow; /* lock to workaround chip bug 9437 */ spinlock_t ipath_tid_lock; /* * IPATH_STATUS_*, * this address is mapped readonly into user processes so they can * get status cheaply, whenever they want. */ u64 *ipath_statusp; /* freeze msg if hw error put chip in freeze */ char *ipath_freezemsg; /* pci access data structure */ struct pci_dev *pcidev; struct cdev *user_cdev; struct cdev *diag_cdev; struct class_device *user_class_dev; struct class_device *diag_class_dev; /* timer used to prevent stats overflow, error throttling, etc. */ struct timer_list ipath_stats_timer; /* check for stale messages in rcv queue */ /* only allow one intr at a time. */ unsigned long ipath_rcv_pending; /* * Shadow copies of registers; size indicates read access size. * Most of them are readonly, but some are write-only register, * where we manipulate the bits in the shadow copy, and then write * the shadow copy to infinipath. * * We deliberately make most of these 32 bits, since they have * restricted range. For any that we read, we won't to generate 32 * bit accesses, since Opteron will generate 2 separate 32 bit HT * transactions for a 64 bit read, and we want to avoid unnecessary * HT transactions. */ /* This is the 64 bit group */ /* * shadow of pioavail, check to be sure it's large enough at * init time. */ unsigned long ipath_pioavailshadow[8]; /* shadow of kr_gpio_out, for rmw ops */ u64 ipath_gpio_out; /* kr_revision shadow */ u64 ipath_revision; /* * shadow of ibcctrl, for interrupt handling of link changes, * etc. */ u64 ipath_ibcctrl; /* * last ibcstatus, to suppress "duplicate" status change messages, * mostly from 2 to 3 */ u64 ipath_lastibcstat; /* hwerrmask shadow */ ipath_err_t ipath_hwerrmask; /* interrupt config reg shadow */ u64 ipath_intconfig; /* kr_sendpiobufbase value */ u64 ipath_piobufbase; /* these are the "32 bit" regs */ /* * number of GUIDs in the flash for this interface; may need some * rethinking for setting on other ifaces */ u32 ipath_nguid; /* * the following two are 32-bit bitmasks, but {test,clear,set}_bit * all expect bit fields to be "unsigned long" */ /* shadow kr_rcvctrl */ unsigned long ipath_rcvctrl; /* shadow kr_sendctrl */ unsigned long ipath_sendctrl; /* value we put in kr_rcvhdrcnt */ u32 ipath_rcvhdrcnt; /* value we put in kr_rcvhdrsize */ u32 ipath_rcvhdrsize; /* value we put in kr_rcvhdrentsize */ u32 ipath_rcvhdrentsize; /* offset of last entry in rcvhdrq */ u32 ipath_hdrqlast; /* kr_portcnt value */ u32 ipath_portcnt; /* kr_pagealign value */ u32 ipath_palign; /* number of "2KB" PIO buffers */ u32 ipath_piobcnt2k; /* size in bytes of "2KB" PIO buffers */ u32 ipath_piosize2k; /* number of "4KB" PIO buffers */ u32 ipath_piobcnt4k; /* size in bytes of "4KB" PIO buffers */ u32 ipath_piosize4k; /* kr_rcvegrbase value */ u32 ipath_rcvegrbase; /* kr_rcvegrcnt value */ u32 ipath_rcvegrcnt; /* kr_rcvtidbase value */ u32 ipath_rcvtidbase; /* kr_rcvtidcnt value */ u32 ipath_rcvtidcnt; /* kr_sendregbase */ u32 ipath_sregbase; /* kr_userregbase */ u32 ipath_uregbase; /* kr_counterregbase */ u32 ipath_cregbase; /* shadow the control register contents */ u32 ipath_control; /* shadow the gpio output contents */ u32 ipath_extctrl; /* PCI revision register (HTC rev on FPGA) */ u32 ipath_pcirev; /* chip address space used by 4k pio buffers */ u32 ipath_4kalign; /* The MTU programmed for this unit */ u32 ipath_ibmtu; /* * The max size IB packet, included IB headers that we can send. * Starts same as ipath_piosize, but is affected when ibmtu is * changed, or by size of eager buffers */ u32 ipath_ibmaxlen; /* * ibmaxlen at init time, limited by chip and by receive buffer * size. Not changed after init. */ u32 ipath_init_ibmaxlen; /* size of each rcvegrbuffer */ u32 ipath_rcvegrbufsize; /* width (2,4,8,16,32) from HT config reg */ u32 ipath_htwidth; /* HT speed (200,400,800,1000) from HT config */ u32 ipath_htspeed; /* ports waiting for PIOavail intr */ unsigned long ipath_portpiowait; /* * number of sequential ibcstatus change for polling active/quiet * (i.e., link not coming up). */ u32 ipath_ibpollcnt; /* low and high portions of MSI capability/vector */ u32 ipath_msi_lo; /* saved after PCIe init for restore after reset */ u32 ipath_msi_hi; /* MSI data (vector) saved for restore */ u16 ipath_msi_data; /* MLID programmed for this instance */ u16 ipath_mlid; /* LID programmed for this instance */ u16 ipath_lid; /* list of pkeys programmed; 0 if not set */ u16 ipath_pkeys[4]; /* ASCII serial number, from flash */ u8 ipath_serial[12]; /* human readable board version */ u8 ipath_boardversion[80]; /* chip major rev, from ipath_revision */ u8 ipath_majrev; /* chip minor rev, from ipath_revision */ u8 ipath_minrev; /* board rev, from ipath_revision */ u8 ipath_boardrev; /* unit # of this chip, if present */ int ipath_unit; /* saved for restore after reset */ u8 ipath_pci_cacheline; /* LID mask control */ u8 ipath_lmc; }; extern volatile __le64 *ipath_port0_rcvhdrtail; extern dma_addr_t ipath_port0_rcvhdrtail_dma; #define IPATH_PORT0_RCVHDRTAIL_SIZE PAGE_SIZE extern struct list_head ipath_dev_list; extern spinlock_t ipath_devs_lock; extern struct ipath_devdata *ipath_lookup(int unit); extern u16 ipath_layer_rcv_opcode; extern int __ipath_layer_intr(struct ipath_devdata *, u32); extern int ipath_layer_intr(struct ipath_devdata *, u32); extern int __ipath_layer_rcv(struct ipath_devdata *, void *, struct sk_buff *); extern int __ipath_layer_rcv_lid(struct ipath_devdata *, void *); extern int __ipath_verbs_piobufavail(struct ipath_devdata *); extern int __ipath_verbs_rcv(struct ipath_devdata *, void *, void *, u32); void ipath_layer_add(struct ipath_devdata *); void ipath_layer_remove(struct ipath_devdata *); int ipath_init_chip(struct ipath_devdata *, int); int ipath_enable_wc(struct ipath_devdata *dd); void ipath_disable_wc(struct ipath_devdata *dd); int ipath_count_units(int *npresentp, int *nupp, u32 *maxportsp); void ipath_shutdown_device(struct ipath_devdata *); struct file_operations; int ipath_cdev_init(int minor, char *name, struct file_operations *fops, struct cdev **cdevp, struct class_device **class_devp); void ipath_cdev_cleanup(struct cdev **cdevp, struct class_device **class_devp); int ipath_diag_add(struct ipath_devdata *); void ipath_diag_remove(struct ipath_devdata *); void ipath_diag_bringup_link(struct ipath_devdata *); extern wait_queue_head_t ipath_sma_state_wait; int ipath_user_add(struct ipath_devdata *dd); void ipath_user_remove(struct ipath_devdata *dd); struct sk_buff *ipath_alloc_skb(struct ipath_devdata *dd, gfp_t); extern int ipath_diag_inuse; irqreturn_t ipath_intr(int irq, void *devid, struct pt_regs *regs); void ipath_decode_err(char *buf, size_t blen, ipath_err_t err); #if __IPATH_INFO || __IPATH_DBG extern const char *ipath_ibcstatus_str[]; #endif /* clean up any per-chip chip-specific stuff */ void ipath_chip_cleanup(struct ipath_devdata *); /* clean up any chip type-specific stuff */ void ipath_chip_done(void); /* check to see if we have to force ordering for write combining */ int ipath_unordered_wc(void); void ipath_disarm_piobufs(struct ipath_devdata *, unsigned first, unsigned cnt); int ipath_create_rcvhdrq(struct ipath_devdata *, struct ipath_portdata *); void ipath_free_pddata(struct ipath_devdata *, u32, int); int ipath_parse_ushort(const char *str, unsigned short *valp); int ipath_wait_linkstate(struct ipath_devdata *, u32, int); void ipath_set_ib_lstate(struct ipath_devdata *, int); void ipath_kreceive(struct ipath_devdata *); int ipath_setrcvhdrsize(struct ipath_devdata *, unsigned); int ipath_reset_device(int); void ipath_get_faststats(unsigned long); /* for use in system calls, where we want to know device type, etc. */ #define port_fp(fp) ((struct ipath_portdata *) (fp)->private_data) /* * values for ipath_flags */ /* The chip is up and initted */ #define IPATH_INITTED 0x2 /* set if any user code has set kr_rcvhdrsize */ #define IPATH_RCVHDRSZ_SET 0x4 /* The chip is present and valid for accesses */ #define IPATH_PRESENT 0x8 /* HT link0 is only 8 bits wide, ignore upper byte crc * errors, etc. */ #define IPATH_8BIT_IN_HT0 0x10 /* HT link1 is only 8 bits wide, ignore upper byte crc * errors, etc. */ #define IPATH_8BIT_IN_HT1 0x20 /* The link is down */ #define IPATH_LINKDOWN 0x40 /* The link level is up (0x11) */ #define IPATH_LINKINIT 0x80 /* The link is in the armed (0x21) state */ #define IPATH_LINKARMED 0x100 /* The link is in the active (0x31) state */ #define IPATH_LINKACTIVE 0x200 /* link current state is unknown */ #define IPATH_LINKUNK 0x400 /* no IB cable, or no device on IB cable */ #define IPATH_NOCABLE 0x4000 /* Supports port zero per packet receive interrupts via * GPIO */ #define IPATH_GPIO_INTR 0x8000 /* uses the coded 4byte TID, not 8 byte */ #define IPATH_4BYTE_TID 0x10000 /* packet/word counters are 32 bit, else those 4 counters * are 64bit */ #define IPATH_32BITCOUNTERS 0x20000 /* can miss port0 rx interrupts */ #define IPATH_POLL_RX_INTR 0x40000 #define IPATH_DISABLED 0x80000 /* administratively disabled */ /* portdata flag bit offsets */ /* waiting for a packet to arrive */ #define IPATH_PORT_WAITING_RCV 2 /* waiting for a PIO buffer to be available */ #define IPATH_PORT_WAITING_PIO 3 /* free up any allocated data at closes */ void ipath_free_data(struct ipath_portdata *dd); int ipath_waitfor_mdio_cmdready(struct ipath_devdata *); int ipath_waitfor_complete(struct ipath_devdata *, ipath_kreg, u64, u64 *); u32 __iomem *ipath_getpiobuf(struct ipath_devdata *, u32 *); /* init PE-800-specific func */ void ipath_init_pe800_funcs(struct ipath_devdata *); /* init HT-400-specific func */ void ipath_init_ht400_funcs(struct ipath_devdata *); void ipath_get_eeprom_info(struct ipath_devdata *); u64 ipath_snap_cntr(struct ipath_devdata *, ipath_creg); /* * number of words used for protocol header if not set by ipath_userinit(); */ #define IPATH_DFLT_RCVHDRSIZE 9 #define IPATH_MDIO_CMD_WRITE 1 #define IPATH_MDIO_CMD_READ 2 #define IPATH_MDIO_CLD_DIV 25 /* to get 2.5 Mhz mdio clock */ #define IPATH_MDIO_CMDVALID 0x40000000 /* bit 30 */ #define IPATH_MDIO_DATAVALID 0x80000000 /* bit 31 */ #define IPATH_MDIO_CTRL_STD 0x0 static inline u64 ipath_mdio_req(int cmd, int dev, int reg, int data) { return (((u64) IPATH_MDIO_CLD_DIV) << 32) | (cmd << 26) | (dev << 21) | (reg << 16) | (data & 0xFFFF); } /* signal and fifo status, in bank 31 */ #define IPATH_MDIO_CTRL_XGXS_REG_8 0x8 /* controls loopback, redundancy */ #define IPATH_MDIO_CTRL_8355_REG_1 0x10 /* premph, encdec, etc. */ #define IPATH_MDIO_CTRL_8355_REG_2 0x11 /* Kchars, etc. */ #define IPATH_MDIO_CTRL_8355_REG_6 0x15 #define IPATH_MDIO_CTRL_8355_REG_9 0x18 #define IPATH_MDIO_CTRL_8355_REG_10 0x1D int ipath_get_user_pages(unsigned long, size_t, struct page **); int ipath_get_user_pages_nocopy(unsigned long, struct page **); void ipath_release_user_pages(struct page **, size_t); void ipath_release_user_pages_on_close(struct page **, size_t); int ipath_eeprom_read(struct ipath_devdata *, u8, void *, int); int ipath_eeprom_write(struct ipath_devdata *, u8, const void *, int); /* these are used for the registers that vary with port */ void ipath_write_kreg_port(const struct ipath_devdata *, ipath_kreg, unsigned, u64); u64 ipath_read_kreg64_port(const struct ipath_devdata *, ipath_kreg, unsigned); /* * We could have a single register get/put routine, that takes a group type, * but this is somewhat clearer and cleaner. It also gives us some error * checking. 64 bit register reads should always work, but are inefficient * on opteron (the northbridge always generates 2 separate HT 32 bit reads), * so we use kreg32 wherever possible. User register and counter register * reads are always 32 bit reads, so only one form of those routines. */ /* * At the moment, none of the s-registers are writable, so no * ipath_write_sreg(), and none of the c-registers are writable, so no * ipath_write_creg(). */ /** * ipath_read_ureg32 - read 32-bit virtualized per-port register * @dd: device * @regno: register number * @port: port number * * Return the contents of a register that is virtualized to be per port. * Returns -1 on errors (not distinguishable from valid contents at * runtime; we may add a separate error variable at some point). */ static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd, ipath_ureg regno, int port) { if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return 0; return readl(regno + (u64 __iomem *) (dd->ipath_uregbase + (char __iomem *)dd->ipath_kregbase + dd->ipath_palign * port)); } /** * ipath_write_ureg - write 32-bit virtualized per-port register * @dd: device * @regno: register number * @value: value * @port: port * * Write the contents of a register that is virtualized to be per port. */ static inline void ipath_write_ureg(const struct ipath_devdata *dd, ipath_ureg regno, u64 value, int port) { u64 __iomem *ubase = (u64 __iomem *) (dd->ipath_uregbase + (char __iomem *) dd->ipath_kregbase + dd->ipath_palign * port); if (dd->ipath_kregbase) writeq(value, &ubase[regno]); } static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd, ipath_kreg regno) { if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return -1; return readl((u32 __iomem *) & dd->ipath_kregbase[regno]); } static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd, ipath_kreg regno) { if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return -1; return readq(&dd->ipath_kregbase[regno]); } static inline void ipath_write_kreg(const struct ipath_devdata *dd, ipath_kreg regno, u64 value) { if (dd->ipath_kregbase) writeq(value, &dd->ipath_kregbase[regno]); } static inline u64 ipath_read_creg(const struct ipath_devdata *dd, ipath_sreg regno) { if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return 0; return readq(regno + (u64 __iomem *) (dd->ipath_cregbase + (char __iomem *)dd->ipath_kregbase)); } static inline u32 ipath_read_creg32(const struct ipath_devdata *dd, ipath_sreg regno) { if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT)) return 0; return readl(regno + (u64 __iomem *) (dd->ipath_cregbase + (char __iomem *)dd->ipath_kregbase)); } /* * sysfs interface. */ struct device_driver; extern const char ipath_core_version[]; int ipath_driver_create_group(struct device_driver *); void ipath_driver_remove_group(struct device_driver *); int ipath_device_create_group(struct device *, struct ipath_devdata *); void ipath_device_remove_group(struct device *, struct ipath_devdata *); int ipath_expose_reset(struct device *); int ipath_init_ipathfs(void); void ipath_exit_ipathfs(void); int ipathfs_add_device(struct ipath_devdata *); int ipathfs_remove_device(struct ipath_devdata *); /* * Flush write combining store buffers (if present) and perform a write * barrier. */ #if defined(CONFIG_X86_64) #define ipath_flush_wc() asm volatile("sfence" ::: "memory") #else #define ipath_flush_wc() wmb() #endif extern unsigned ipath_debug; /* debugging bit mask */ const char *ipath_get_unit_name(int unit); extern struct mutex ipath_mutex; #define IPATH_DRV_NAME "ipath_core" #define IPATH_MAJOR 233 #define IPATH_USER_MINOR_BASE 0 #define IPATH_SMA_MINOR 128 #define IPATH_DIAG_MINOR_BASE 129 #define IPATH_NMINORS 255 #define ipath_dev_err(dd,fmt,...) \ do { \ const struct ipath_devdata *__dd = (dd); \ if (__dd->pcidev) \ dev_err(&__dd->pcidev->dev, "%s: " fmt, \ ipath_get_unit_name(__dd->ipath_unit), \ ##__VA_ARGS__); \ else \ printk(KERN_ERR IPATH_DRV_NAME ": %s: " fmt, \ ipath_get_unit_name(__dd->ipath_unit), \ ##__VA_ARGS__); \ } while (0) #if _IPATH_DEBUGGING # define __IPATH_DBG_WHICH(which,fmt,...) \ do { \ if(unlikely(ipath_debug&(which))) \ printk(KERN_DEBUG IPATH_DRV_NAME ": %s: " fmt, \ __func__,##__VA_ARGS__); \ } while(0) # define ipath_dbg(fmt,...) \ __IPATH_DBG_WHICH(__IPATH_DBG,fmt,##__VA_ARGS__) # define ipath_cdbg(which,fmt,...) \ __IPATH_DBG_WHICH(__IPATH_##which##DBG,fmt,##__VA_ARGS__) #else /* ! _IPATH_DEBUGGING */ # define ipath_dbg(fmt,...) # define ipath_cdbg(which,fmt,...) #endif /* _IPATH_DEBUGGING */ #endif /* _IPATH_KERNEL_H */