pcibr_dvr.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:126k
- /*
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001-2002 Silicon Graphics, Inc. All rights reserved.
- */
- #include <linux/types.h>
- #include <linux/slab.h>
- #include <linux/module.h>
- #include <asm/sn/sgi.h>
- #include <asm/sn/sn_cpuid.h>
- #include <asm/sn/addrs.h>
- #include <asm/sn/arch.h>
- #include <asm/sn/iograph.h>
- #include <asm/sn/invent.h>
- #include <asm/sn/hcl.h>
- #include <asm/sn/labelcl.h>
- #include <asm/sn/xtalk/xwidget.h>
- #include <asm/sn/pci/bridge.h>
- #include <asm/sn/pci/pciio.h>
- #include <asm/sn/pci/pcibr.h>
- #include <asm/sn/pci/pcibr_private.h>
- #include <asm/sn/pci/pci_defs.h>
- #include <asm/sn/prio.h>
- #include <asm/sn/xtalk/xbow.h>
- #include <asm/sn/ioc3.h>
- #include <asm/sn/eeprom.h>
- #include <asm/sn/io.h>
- #include <asm/sn/sn_private.h>
- #ifdef __ia64
- #define rmallocmap atemapalloc
- #define rmfreemap atemapfree
- #define rmfree atefree
- #define rmalloc atealloc
- #endif
- /*
- * Macros related to the Lucent USS 302/312 usb timeout workaround. It
- * appears that if the lucent part can get into a retry loop if it sees a
- * DAC on the bus during a pio read retry. The loop is broken after about
- * 1ms, so we need to set up bridges holding this part to allow at least
- * 1ms for pio.
- */
- #define USS302_TIMEOUT_WAR
- #ifdef USS302_TIMEOUT_WAR
- #define LUCENT_USBHC_VENDOR_ID_NUM 0x11c1
- #define LUCENT_USBHC302_DEVICE_ID_NUM 0x5801
- #define LUCENT_USBHC312_DEVICE_ID_NUM 0x5802
- #define USS302_BRIDGE_TIMEOUT_HLD 4
- #endif
- int pcibr_devflag = D_MP;
- /*
- * This is the file operation table for the pcibr driver.
- * As each of the functions are implemented, put the
- * appropriate function name below.
- */
- struct file_operations pcibr_fops = {
- owner: THIS_MODULE,
- llseek: NULL,
- read: NULL,
- write: NULL,
- readdir: NULL,
- poll: NULL,
- ioctl: NULL,
- mmap: NULL,
- open: NULL,
- flush: NULL,
- release: NULL,
- fsync: NULL,
- fasync: NULL,
- lock: NULL,
- readv: NULL,
- writev: NULL
- };
- #ifdef LATER
- #if PCIBR_ATE_DEBUG
- static struct reg_values ssram_sizes[] =
- {
- {BRIDGE_CTRL_SSRAM_512K, "512k"},
- {BRIDGE_CTRL_SSRAM_128K, "128k"},
- {BRIDGE_CTRL_SSRAM_64K, "64k"},
- {BRIDGE_CTRL_SSRAM_1K, "1k"},
- {0}
- };
- static struct reg_desc control_bits[] =
- {
- {BRIDGE_CTRL_FLASH_WR_EN, 0, "FLASH_WR_EN"},
- {BRIDGE_CTRL_EN_CLK50, 0, "EN_CLK50"},
- {BRIDGE_CTRL_EN_CLK40, 0, "EN_CLK40"},
- {BRIDGE_CTRL_EN_CLK33, 0, "EN_CLK33"},
- {BRIDGE_CTRL_RST_MASK, -24, "RST", "%x"},
- {BRIDGE_CTRL_IO_SWAP, 0, "IO_SWAP"},
- {BRIDGE_CTRL_MEM_SWAP, 0, "MEM_SWAP"},
- {BRIDGE_CTRL_PAGE_SIZE, 0, "PAGE_SIZE"},
- {BRIDGE_CTRL_SS_PAR_BAD, 0, "SS_PAR_BAD"},
- {BRIDGE_CTRL_SS_PAR_EN, 0, "SS_PAR_EN"},
- {BRIDGE_CTRL_SSRAM_SIZE_MASK, 0, "SSRAM_SIZE", 0, ssram_sizes},
- {BRIDGE_CTRL_F_BAD_PKT, 0, "F_BAD_PKT"},
- {BRIDGE_CTRL_LLP_XBAR_CRD_MASK, -12, "LLP_XBAR_CRD", "%d"},
- {BRIDGE_CTRL_CLR_RLLP_CNT, 0, "CLR_RLLP_CNT"},
- {BRIDGE_CTRL_CLR_TLLP_CNT, 0, "CLR_TLLP_CNT"},
- {BRIDGE_CTRL_SYS_END, 0, "SYS_END"},
- {BRIDGE_CTRL_BUS_SPEED_MASK, -4, "BUS_SPEED", "%d"},
- {BRIDGE_CTRL_WIDGET_ID_MASK, 0, "WIDGET_ID", "%x"},
- {0}
- };
- #endif
- #endif /* LATER */
- /* kbrick widgetnum-to-bus layout */
- int p_busnum[MAX_PORT_NUM] = { /* widget# */
- 0, 0, 0, 0, 0, 0, 0, 0, /* 0x0 - 0x7 */
- 2, /* 0x8 */
- 1, /* 0x9 */
- 0, 0, /* 0xa - 0xb */
- 5, /* 0xc */
- 6, /* 0xd */
- 4, /* 0xe */
- 3, /* 0xf */
- };
- /*
- * Additional PIO spaces per slot are
- * recorded in this structure.
- */
- struct pciio_piospace_s {
- pciio_piospace_t next; /* another space for this device */
- char free; /* 1 if free, 0 if in use */
- pciio_space_t space; /* Which space is in use */
- iopaddr_t start; /* Starting address of the PIO space */
- size_t count; /* size of PIO space */
- };
- #if PCIBR_SOFT_LIST
- pcibr_list_p pcibr_list = 0;
- #endif
- extern int hwgraph_vertex_name_get(devfs_handle_t vhdl, char *buf, uint buflen);
- extern int hub_device_flags_set(devfs_handle_t widget_dev, hub_widget_flags_t flags);
- extern long atoi(register char *p);
- extern cnodeid_t nodevertex_to_cnodeid(devfs_handle_t vhdl);
- extern void *swap_ptr(void **loc, void *new);
- extern char *dev_to_name(devfs_handle_t dev, char *buf, uint buflen);
- extern struct map *atemapalloc(uint64_t);
- extern void atefree(struct map *, size_t, uint64_t);
- extern void atemapfree(struct map *);
- extern pciio_dmamap_t get_free_pciio_dmamap(devfs_handle_t);
- extern void free_pciio_dmamap(pcibr_dmamap_t);
- #define ATE_WRITE() ate_write(ate_ptr, ate_count, ate)
- #if PCIBR_FREEZE_TIME
- #define ATE_FREEZE() s = ate_freeze(pcibr_dmamap, &freeze_time, cmd_regs)
- #else
- #define ATE_FREEZE() s = ate_freeze(pcibr_dmamap, cmd_regs)
- #endif /* PCIBR_FREEZE_TIME */
- #if PCIBR_FREEZE_TIME
- #define ATE_THAW() ate_thaw(pcibr_dmamap, ate_index, ate, ate_total, freeze_time, cmd_regs, s)
- #else
- #define ATE_THAW() ate_thaw(pcibr_dmamap, ate_index, cmd_regs, s)
- #endif
- /* =====================================================================
- * Function Table of Contents
- *
- * The order of functions in this file has stopped
- * making much sense. We might want to take a look
- * at it some time and bring back some sanity, or
- * perhaps bust this file into smaller chunks.
- */
- extern void do_pcibr_rrb_clear(bridge_t *, int);
- extern void do_pcibr_rrb_flush(bridge_t *, int);
- extern int do_pcibr_rrb_count_valid(bridge_t *, pciio_slot_t);
- extern int do_pcibr_rrb_count_avail(bridge_t *, pciio_slot_t);
- extern int do_pcibr_rrb_alloc(bridge_t *, pciio_slot_t, int);
- extern int do_pcibr_rrb_free(bridge_t *, pciio_slot_t, int);
- extern void do_pcibr_rrb_autoalloc(pcibr_soft_t, int, int);
- extern int pcibr_wrb_flush(devfs_handle_t);
- extern int pcibr_rrb_alloc(devfs_handle_t, int *, int *);
- extern int pcibr_rrb_check(devfs_handle_t, int *, int *, int *, int *);
- extern int pcibr_alloc_all_rrbs(devfs_handle_t, int, int, int, int, int, int, int, int, int);
- extern void pcibr_rrb_flush(devfs_handle_t);
- static int pcibr_try_set_device(pcibr_soft_t, pciio_slot_t, unsigned, bridgereg_t);
- void pcibr_release_device(pcibr_soft_t, pciio_slot_t, bridgereg_t);
- extern void pcibr_clearwidint(bridge_t *);
- extern void pcibr_setwidint(xtalk_intr_t);
- void pcibr_init(void);
- int pcibr_attach(devfs_handle_t);
- int pcibr_detach(devfs_handle_t);
- int pcibr_open(devfs_handle_t *, int, int, cred_t *);
- int pcibr_close(devfs_handle_t, int, int, cred_t *);
- int pcibr_map(devfs_handle_t, vhandl_t *, off_t, size_t, uint);
- int pcibr_unmap(devfs_handle_t, vhandl_t *);
- int pcibr_ioctl(devfs_handle_t, int, void *, int, struct cred *, int *);
- void pcibr_freeblock_sub(iopaddr_t *, iopaddr_t *, iopaddr_t, size_t);
- extern int pcibr_init_ext_ate_ram(bridge_t *);
- extern int pcibr_ate_alloc(pcibr_soft_t, int);
- extern void pcibr_ate_free(pcibr_soft_t, int, int);
- extern unsigned ate_freeze(pcibr_dmamap_t pcibr_dmamap,
- #if PCIBR_FREEZE_TIME
- unsigned *freeze_time_ptr,
- #endif
- unsigned *cmd_regs);
- extern void ate_write(bridge_ate_p ate_ptr, int ate_count, bridge_ate_t ate);
- extern void ate_thaw(pcibr_dmamap_t pcibr_dmamap, int ate_index,
- #if PCIBR_FREEZE_TIME
- bridge_ate_t ate,
- int ate_total,
- unsigned freeze_time_start,
- #endif
- unsigned *cmd_regs,
- unsigned s);
- pcibr_info_t pcibr_info_get(devfs_handle_t);
- static iopaddr_t pcibr_addr_pci_to_xio(devfs_handle_t, pciio_slot_t, pciio_space_t, iopaddr_t, size_t, unsigned);
- pcibr_piomap_t pcibr_piomap_alloc(devfs_handle_t, device_desc_t, pciio_space_t, iopaddr_t, size_t, size_t, unsigned);
- void pcibr_piomap_free(pcibr_piomap_t);
- caddr_t pcibr_piomap_addr(pcibr_piomap_t, iopaddr_t, size_t);
- void pcibr_piomap_done(pcibr_piomap_t);
- caddr_t pcibr_piotrans_addr(devfs_handle_t, device_desc_t, pciio_space_t, iopaddr_t, size_t, unsigned);
- iopaddr_t pcibr_piospace_alloc(devfs_handle_t, device_desc_t, pciio_space_t, size_t, size_t);
- void pcibr_piospace_free(devfs_handle_t, pciio_space_t, iopaddr_t, size_t);
- static iopaddr_t pcibr_flags_to_d64(unsigned, pcibr_soft_t);
- extern bridge_ate_t pcibr_flags_to_ate(unsigned);
- pcibr_dmamap_t pcibr_dmamap_alloc(devfs_handle_t, device_desc_t, size_t, unsigned);
- void pcibr_dmamap_free(pcibr_dmamap_t);
- extern bridge_ate_p pcibr_ate_addr(pcibr_soft_t, int);
- static iopaddr_t pcibr_addr_xio_to_pci(pcibr_soft_t, iopaddr_t, size_t);
- iopaddr_t pcibr_dmamap_addr(pcibr_dmamap_t, paddr_t, size_t);
- alenlist_t pcibr_dmamap_list(pcibr_dmamap_t, alenlist_t, unsigned);
- void pcibr_dmamap_done(pcibr_dmamap_t);
- cnodeid_t pcibr_get_dmatrans_node(devfs_handle_t);
- iopaddr_t pcibr_dmatrans_addr(devfs_handle_t, device_desc_t, paddr_t, size_t, unsigned);
- alenlist_t pcibr_dmatrans_list(devfs_handle_t, device_desc_t, alenlist_t, unsigned);
- void pcibr_dmamap_drain(pcibr_dmamap_t);
- void pcibr_dmaaddr_drain(devfs_handle_t, paddr_t, size_t);
- void pcibr_dmalist_drain(devfs_handle_t, alenlist_t);
- iopaddr_t pcibr_dmamap_pciaddr_get(pcibr_dmamap_t);
- extern unsigned pcibr_intr_bits(pciio_info_t info, pciio_intr_line_t lines);
- extern pcibr_intr_t pcibr_intr_alloc(devfs_handle_t, device_desc_t, pciio_intr_line_t, devfs_handle_t);
- extern void pcibr_intr_free(pcibr_intr_t);
- extern void pcibr_setpciint(xtalk_intr_t);
- extern int pcibr_intr_connect(pcibr_intr_t);
- extern void pcibr_intr_disconnect(pcibr_intr_t);
- extern devfs_handle_t pcibr_intr_cpu_get(pcibr_intr_t);
- extern void pcibr_xintr_preset(void *, int, xwidgetnum_t, iopaddr_t, xtalk_intr_vector_t);
- extern void pcibr_intr_func(intr_arg_t);
- extern void print_bridge_errcmd(uint32_t, char *);
- extern void pcibr_error_dump(pcibr_soft_t);
- extern uint32_t pcibr_errintr_group(uint32_t);
- extern void pcibr_pioerr_check(pcibr_soft_t);
- extern void pcibr_error_intr_handler(intr_arg_t);
- extern int pcibr_addr_toslot(pcibr_soft_t, iopaddr_t, pciio_space_t *, iopaddr_t *, pciio_function_t *);
- extern void pcibr_error_cleanup(pcibr_soft_t, int);
- extern void pcibr_device_disable(pcibr_soft_t, int);
- extern int pcibr_pioerror(pcibr_soft_t, int, ioerror_mode_t, ioerror_t *);
- extern int pcibr_dmard_error(pcibr_soft_t, int, ioerror_mode_t, ioerror_t *);
- extern int pcibr_dmawr_error(pcibr_soft_t, int, ioerror_mode_t, ioerror_t *);
- extern int pcibr_error_handler(error_handler_arg_t, int, ioerror_mode_t, ioerror_t *);
- extern int pcibr_error_devenable(devfs_handle_t, int);
- void pcibr_provider_startup(devfs_handle_t);
- void pcibr_provider_shutdown(devfs_handle_t);
- int pcibr_reset(devfs_handle_t);
- pciio_endian_t pcibr_endian_set(devfs_handle_t, pciio_endian_t, pciio_endian_t);
- int pcibr_priority_bits_set(pcibr_soft_t, pciio_slot_t, pciio_priority_t);
- pciio_priority_t pcibr_priority_set(devfs_handle_t, pciio_priority_t);
- int pcibr_device_flags_set(devfs_handle_t, pcibr_device_flags_t);
- extern cfg_p pcibr_config_addr(devfs_handle_t, unsigned);
- extern uint64_t pcibr_config_get(devfs_handle_t, unsigned, unsigned);
- extern void pcibr_config_set(devfs_handle_t, unsigned, unsigned, uint64_t);
- extern void do_pcibr_config_set(cfg_p, unsigned, unsigned, uint64_t);
- extern pcibr_hints_t pcibr_hints_get(devfs_handle_t, int);
- extern void pcibr_hints_fix_rrbs(devfs_handle_t);
- extern void pcibr_hints_dualslot(devfs_handle_t, pciio_slot_t, pciio_slot_t);
- extern void pcibr_hints_intr_bits(devfs_handle_t, pcibr_intr_bits_f *);
- extern void pcibr_set_rrb_callback(devfs_handle_t, rrb_alloc_funct_t);
- extern void pcibr_hints_handsoff(devfs_handle_t);
- extern void pcibr_hints_subdevs(devfs_handle_t, pciio_slot_t, uint64_t);
- #ifdef BRIDGE_B_DATACORR_WAR
- extern int ql_bridge_rev_b_war(devfs_handle_t);
- extern int bridge_rev_b_data_check_disable;
- char *rev_b_datacorr_warning =
- "***************************** WARNING! ******************************n";
- char *rev_b_datacorr_mesg =
- "UNRECOVERABLE IO LINK ERROR. CONTACT SERVICE PROVIDERn";
- #endif
- extern int pcibr_slot_reset(devfs_handle_t,pciio_slot_t);
- extern int pcibr_slot_info_init(devfs_handle_t,pciio_slot_t);
- extern int pcibr_slot_info_free(devfs_handle_t,pciio_slot_t);
- extern int pcibr_slot_addr_space_init(devfs_handle_t,pciio_slot_t);
- extern int pcibr_slot_device_init(devfs_handle_t, pciio_slot_t);
- extern int pcibr_slot_guest_info_init(devfs_handle_t,pciio_slot_t);
- extern int pcibr_slot_call_device_attach(devfs_handle_t, pciio_slot_t, int);
- extern int pcibr_slot_call_device_detach(devfs_handle_t, pciio_slot_t, int);
- extern int pcibr_slot_attach(devfs_handle_t, pciio_slot_t, int, char *, int *);
- extern int pcibr_slot_detach(devfs_handle_t, pciio_slot_t, int);
- extern int pcibr_is_slot_sys_critical(devfs_handle_t, pciio_slot_t);
- #ifdef LATER
- extern int pcibr_slot_startup(devfs_handle_t, pcibr_slot_req_t);
- extern int pcibr_slot_shutdown(devfs_handle_t, pcibr_slot_req_t);
- extern int pcibr_slot_query(devfs_handle_t, pcibr_slot_req_t);
- #endif
- extern int pcibr_slot_initial_rrb_alloc(devfs_handle_t, pciio_slot_t);
- extern int pcibr_initial_rrb(devfs_handle_t, pciio_slot_t, pciio_slot_t);
- /* =====================================================================
- * Device(x) register management
- */
- /* pcibr_try_set_device: attempt to modify Device(x)
- * for the specified slot on the specified bridge
- * as requested in flags, limited to the specified
- * bits. Returns which BRIDGE bits were in conflict,
- * or ZERO if everything went OK.
- *
- * Caller MUST hold pcibr_lock when calling this function.
- */
- static int
- pcibr_try_set_device(pcibr_soft_t pcibr_soft,
- pciio_slot_t slot,
- unsigned flags,
- bridgereg_t mask)
- {
- bridge_t *bridge;
- pcibr_soft_slot_t slotp;
- bridgereg_t old;
- bridgereg_t new;
- bridgereg_t chg;
- bridgereg_t bad;
- bridgereg_t badpmu;
- bridgereg_t badd32;
- bridgereg_t badd64;
- bridgereg_t fix;
- unsigned long s;
- bridgereg_t xmask;
- xmask = mask;
- if (pcibr_soft->bs_xbridge) {
- if (mask == BRIDGE_DEV_PMU_BITS)
- xmask = XBRIDGE_DEV_PMU_BITS;
- if (mask == BRIDGE_DEV_D64_BITS)
- xmask = XBRIDGE_DEV_D64_BITS;
- }
- slotp = &pcibr_soft->bs_slot[slot];
- s = pcibr_lock(pcibr_soft);
- bridge = pcibr_soft->bs_base;
- old = slotp->bss_device;
- /* figure out what the desired
- * Device(x) bits are based on
- * the flags specified.
- */
- new = old;
- /* Currently, we inherit anything that
- * the new caller has not specified in
- * one way or another, unless we take
- * action here to not inherit.
- *
- * This is needed for the "swap" stuff,
- * since it could have been set via
- * pcibr_endian_set -- altho note that
- * any explicit PCIBR_BYTE_STREAM or
- * PCIBR_WORD_VALUES will freely override
- * the effect of that call (and vice
- * versa, no protection either way).
- *
- * I want to get rid of pcibr_endian_set
- * in favor of tracking DMA endianness
- * using the flags specified when DMA
- * channels are created.
- */
- #define BRIDGE_DEV_WRGA_BITS (BRIDGE_DEV_PMU_WRGA_EN | BRIDGE_DEV_DIR_WRGA_EN)
- #define BRIDGE_DEV_SWAP_BITS (BRIDGE_DEV_SWAP_PMU | BRIDGE_DEV_SWAP_DIR)
- /* Do not use Barrier, Write Gather,
- * or Prefetch unless asked.
- * Leave everything else as it
- * was from the last time.
- */
- new = new
- & ~BRIDGE_DEV_BARRIER
- & ~BRIDGE_DEV_WRGA_BITS
- & ~BRIDGE_DEV_PREF
- ;
- /* Generic macro flags
- */
- if (flags & PCIIO_DMA_DATA) {
- new = (new
- & ~BRIDGE_DEV_BARRIER) /* barrier off */
- | BRIDGE_DEV_PREF; /* prefetch on */
- }
- if (flags & PCIIO_DMA_CMD) {
- new = ((new
- & ~BRIDGE_DEV_PREF) /* prefetch off */
- & ~BRIDGE_DEV_WRGA_BITS) /* write gather off */
- | BRIDGE_DEV_BARRIER; /* barrier on */
- }
- /* Generic detail flags
- */
- if (flags & PCIIO_WRITE_GATHER)
- new |= BRIDGE_DEV_WRGA_BITS;
- if (flags & PCIIO_NOWRITE_GATHER)
- new &= ~BRIDGE_DEV_WRGA_BITS;
- if (flags & PCIIO_PREFETCH)
- new |= BRIDGE_DEV_PREF;
- if (flags & PCIIO_NOPREFETCH)
- new &= ~BRIDGE_DEV_PREF;
- if (flags & PCIBR_WRITE_GATHER)
- new |= BRIDGE_DEV_WRGA_BITS;
- if (flags & PCIBR_NOWRITE_GATHER)
- new &= ~BRIDGE_DEV_WRGA_BITS;
- if (flags & PCIIO_BYTE_STREAM)
- new |= (pcibr_soft->bs_xbridge) ?
- BRIDGE_DEV_SWAP_DIR : BRIDGE_DEV_SWAP_BITS;
- if (flags & PCIIO_WORD_VALUES)
- new &= (pcibr_soft->bs_xbridge) ?
- ~BRIDGE_DEV_SWAP_DIR : ~BRIDGE_DEV_SWAP_BITS;
- /* Provider-specific flags
- */
- if (flags & PCIBR_PREFETCH)
- new |= BRIDGE_DEV_PREF;
- if (flags & PCIBR_NOPREFETCH)
- new &= ~BRIDGE_DEV_PREF;
- if (flags & PCIBR_PRECISE)
- new |= BRIDGE_DEV_PRECISE;
- if (flags & PCIBR_NOPRECISE)
- new &= ~BRIDGE_DEV_PRECISE;
- if (flags & PCIBR_BARRIER)
- new |= BRIDGE_DEV_BARRIER;
- if (flags & PCIBR_NOBARRIER)
- new &= ~BRIDGE_DEV_BARRIER;
- if (flags & PCIBR_64BIT)
- new |= BRIDGE_DEV_DEV_SIZE;
- if (flags & PCIBR_NO64BIT)
- new &= ~BRIDGE_DEV_DEV_SIZE;
- chg = old ^ new; /* what are we changing, */
- chg &= xmask; /* of the interesting bits */
- if (chg) {
- badd32 = slotp->bss_d32_uctr ? (BRIDGE_DEV_D32_BITS & chg) : 0;
- if (pcibr_soft->bs_xbridge) {
- badpmu = slotp->bss_pmu_uctr ? (XBRIDGE_DEV_PMU_BITS & chg) : 0;
- badd64 = slotp->bss_d64_uctr ? (XBRIDGE_DEV_D64_BITS & chg) : 0;
- } else {
- badpmu = slotp->bss_pmu_uctr ? (BRIDGE_DEV_PMU_BITS & chg) : 0;
- badd64 = slotp->bss_d64_uctr ? (BRIDGE_DEV_D64_BITS & chg) : 0;
- }
- bad = badpmu | badd32 | badd64;
- if (bad) {
- /* some conflicts can be resolved by
- * forcing the bit on. this may cause
- * some performance degredation in
- * the stream(s) that want the bit off,
- * but the alternative is not allowing
- * the new stream at all.
- */
- if ( (fix = bad & (BRIDGE_DEV_PRECISE |
- BRIDGE_DEV_BARRIER)) ){
- bad &= ~fix;
- /* don't change these bits if
- * they are already set in "old"
- */
- chg &= ~(fix & old);
- }
- /* some conflicts can be resolved by
- * forcing the bit off. this may cause
- * some performance degredation in
- * the stream(s) that want the bit on,
- * but the alternative is not allowing
- * the new stream at all.
- */
- if ( (fix = bad & (BRIDGE_DEV_WRGA_BITS |
- BRIDGE_DEV_PREF)) ) {
- bad &= ~fix;
- /* don't change these bits if
- * we wanted to turn them on.
- */
- chg &= ~(fix & new);
- }
- /* conflicts in other bits mean
- * we can not establish this DMA
- * channel while the other(s) are
- * still present.
- */
- if (bad) {
- pcibr_unlock(pcibr_soft, s);
- #if (DEBUG && PCIBR_DEV_DEBUG)
- printk("pcibr_try_set_device: mod blocked by %Rn", bad, device_bits);
- #endif
- return bad;
- }
- }
- }
- if (mask == BRIDGE_DEV_PMU_BITS)
- slotp->bss_pmu_uctr++;
- if (mask == BRIDGE_DEV_D32_BITS)
- slotp->bss_d32_uctr++;
- if (mask == BRIDGE_DEV_D64_BITS)
- slotp->bss_d64_uctr++;
- /* the value we want to write is the
- * original value, with the bits for
- * our selected changes flipped, and
- * with any disabled features turned off.
- */
- new = old ^ chg; /* only change what we want to change */
- if (slotp->bss_device == new) {
- pcibr_unlock(pcibr_soft, s);
- return 0;
- }
- bridge->b_device[slot].reg = new;
- slotp->bss_device = new;
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- pcibr_unlock(pcibr_soft, s);
- #if DEBUG && PCIBR_DEV_DEBUG
- printk("pcibr Device(%d): 0x%pn", slot, bridge->b_device[slot].reg);
- #endif
- return 0;
- }
- void
- pcibr_release_device(pcibr_soft_t pcibr_soft,
- pciio_slot_t slot,
- bridgereg_t mask)
- {
- pcibr_soft_slot_t slotp;
- unsigned long s;
- slotp = &pcibr_soft->bs_slot[slot];
- s = pcibr_lock(pcibr_soft);
- if (mask == BRIDGE_DEV_PMU_BITS)
- slotp->bss_pmu_uctr--;
- if (mask == BRIDGE_DEV_D32_BITS)
- slotp->bss_d32_uctr--;
- if (mask == BRIDGE_DEV_D64_BITS)
- slotp->bss_d64_uctr--;
- pcibr_unlock(pcibr_soft, s);
- }
- /*
- * flush write gather buffer for slot
- */
- static void
- pcibr_device_write_gather_flush(pcibr_soft_t pcibr_soft,
- pciio_slot_t slot)
- {
- bridge_t *bridge;
- unsigned long s;
- volatile uint32_t wrf;
- s = pcibr_lock(pcibr_soft);
- bridge = pcibr_soft->bs_base;
- wrf = bridge->b_wr_req_buf[slot].reg;
- pcibr_unlock(pcibr_soft, s);
- }
- /* =====================================================================
- * Bridge (pcibr) "Device Driver" entry points
- */
- /*
- * pcibr_init: called once during system startup or
- * when a loadable driver is loaded.
- *
- * The driver_register function should normally
- * be in _reg, not _init. But the pcibr driver is
- * required by devinit before the _reg routines
- * are called, so this is an exception.
- */
- void
- pcibr_init(void)
- {
- #if DEBUG && ATTACH_DEBUG
- printk("pcibr_initn");
- #endif
- xwidget_driver_register(XBRIDGE_WIDGET_PART_NUM,
- XBRIDGE_WIDGET_MFGR_NUM,
- "pcibr_",
- 0);
- xwidget_driver_register(BRIDGE_WIDGET_PART_NUM,
- BRIDGE_WIDGET_MFGR_NUM,
- "pcibr_",
- 0);
- }
- /*
- * open/close mmap/munmap interface would be used by processes
- * that plan to map the PCI bridge, and muck around with the
- * registers. This is dangerous to do, and will be allowed
- * to a select brand of programs. Typically these are
- * diagnostics programs, or some user level commands we may
- * write to do some weird things.
- * To start with expect them to have root priveleges.
- * We will ask for more later.
- */
- /* ARGSUSED */
- int
- pcibr_open(devfs_handle_t *devp, int oflag, int otyp, cred_t *credp)
- {
- return 0;
- }
- /*ARGSUSED */
- int
- pcibr_close(devfs_handle_t dev, int oflag, int otyp, cred_t *crp)
- {
- return 0;
- }
- /*ARGSUSED */
- int
- pcibr_map(devfs_handle_t dev, vhandl_t *vt, off_t off, size_t len, uint prot)
- {
- int error;
- devfs_handle_t vhdl = dev_to_vhdl(dev);
- devfs_handle_t pcibr_vhdl = hwgraph_connectpt_get(vhdl);
- pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- bridge_t *bridge = pcibr_soft->bs_base;
- hwgraph_vertex_unref(pcibr_vhdl);
- ASSERT(pcibr_soft);
- len = ctob(btoc(len)); /* Make len page aligned */
- error = v_mapphys(vt, (void *) ((__psunsigned_t) bridge + off), len);
- /*
- * If the offset being mapped corresponds to the flash prom
- * base, and if the mapping succeeds, and if the user
- * has requested the protections to be WRITE, enable the
- * flash prom to be written.
- *
- * XXX- deprecate this in favor of using the
- * real flash driver ...
- */
- if (!error &&
- ((off == BRIDGE_EXTERNAL_FLASH) ||
- (len > BRIDGE_EXTERNAL_FLASH))) {
- int s;
- /*
- * ensure that we write and read without any interruption.
- * The read following the write is required for the Bridge war
- */
- s = splhi();
- bridge->b_wid_control |= BRIDGE_CTRL_FLASH_WR_EN;
- bridge->b_wid_control; /* inval addr bug war */
- splx(s);
- }
- return error;
- }
- /*ARGSUSED */
- int
- pcibr_unmap(devfs_handle_t dev, vhandl_t *vt)
- {
- devfs_handle_t pcibr_vhdl = hwgraph_connectpt_get((devfs_handle_t) dev);
- pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- bridge_t *bridge = pcibr_soft->bs_base;
- hwgraph_vertex_unref(pcibr_vhdl);
- /*
- * If flashprom write was enabled, disable it, as
- * this is the last unmap.
- */
- if (bridge->b_wid_control & BRIDGE_CTRL_FLASH_WR_EN) {
- int s;
- /*
- * ensure that we write and read without any interruption.
- * The read following the write is required for the Bridge war
- */
- s = splhi();
- bridge->b_wid_control &= ~BRIDGE_CTRL_FLASH_WR_EN;
- bridge->b_wid_control; /* inval addr bug war */
- splx(s);
- }
- return 0;
- }
- /* This is special case code used by grio. There are plans to make
- * this a bit more general in the future, but till then this should
- * be sufficient.
- */
- pciio_slot_t
- pcibr_device_slot_get(devfs_handle_t dev_vhdl)
- {
- char devname[MAXDEVNAME];
- devfs_handle_t tdev;
- pciio_info_t pciio_info;
- pciio_slot_t slot = PCIIO_SLOT_NONE;
- vertex_to_name(dev_vhdl, devname, MAXDEVNAME);
- /* run back along the canonical path
- * until we find a PCI connection point.
- */
- tdev = hwgraph_connectpt_get(dev_vhdl);
- while (tdev != GRAPH_VERTEX_NONE) {
- pciio_info = pciio_info_chk(tdev);
- if (pciio_info) {
- slot = pciio_info_slot_get(pciio_info);
- break;
- }
- hwgraph_vertex_unref(tdev);
- tdev = hwgraph_connectpt_get(tdev);
- }
- hwgraph_vertex_unref(tdev);
- return slot;
- }
- /*ARGSUSED */
- int
- pcibr_ioctl(devfs_handle_t dev,
- int cmd,
- void *arg,
- int flag,
- struct cred *cr,
- int *rvalp)
- {
- devfs_handle_t pcibr_vhdl = hwgraph_connectpt_get((devfs_handle_t)dev);
- #ifdef LATER
- pcibr_soft_t pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- #endif
- int error = 0;
- hwgraph_vertex_unref(pcibr_vhdl);
- switch (cmd) {
- #ifdef LATER
- case GIOCSETBW:
- {
- grio_ioctl_info_t info;
- pciio_slot_t slot = 0;
- if (!cap_able((uint64_t)CAP_DEVICE_MGT)) {
- error = EPERM;
- break;
- }
- if (COPYIN(arg, &info, sizeof(grio_ioctl_info_t))) {
- error = EFAULT;
- break;
- }
- #ifdef GRIO_DEBUG
- printk("pcibr:: prev_vhdl: %d reqbw: %lldn",
- info.prev_vhdl, info.reqbw);
- #endif /* GRIO_DEBUG */
- if ((slot = pcibr_device_slot_get(info.prev_vhdl)) ==
- PCIIO_SLOT_NONE) {
- error = EIO;
- break;
- }
- if (info.reqbw)
- pcibr_priority_bits_set(pcibr_soft, slot, PCI_PRIO_HIGH);
- break;
- }
- case GIOCRELEASEBW:
- {
- grio_ioctl_info_t info;
- pciio_slot_t slot = 0;
- if (!cap_able(CAP_DEVICE_MGT)) {
- error = EPERM;
- break;
- }
- if (COPYIN(arg, &info, sizeof(grio_ioctl_info_t))) {
- error = EFAULT;
- break;
- }
- #ifdef GRIO_DEBUG
- printk("pcibr:: prev_vhdl: %d reqbw: %lldn",
- info.prev_vhdl, info.reqbw);
- #endif /* GRIO_DEBUG */
- if ((slot = pcibr_device_slot_get(info.prev_vhdl)) ==
- PCIIO_SLOT_NONE) {
- error = EIO;
- break;
- }
- if (info.reqbw)
- pcibr_priority_bits_set(pcibr_soft, slot, PCI_PRIO_LOW);
- break;
- }
- case PCIBR_SLOT_STARTUP:
- {
- struct pcibr_slot_req_s req;
- if (!cap_able(CAP_DEVICE_MGT)) {
- error = EPERM;
- break;
- }
- if (COPYIN(arg, &req, sizeof(req))) {
- error = EFAULT;
- break;
- }
- error = pcibr_slot_startup(pcibr_vhdl, &req);
- break;
- }
- case PCIBR_SLOT_SHUTDOWN:
- {
- struct pcibr_slot_req_s req;
- if (!cap_able(CAP_DEVICE_MGT)) {
- error = EPERM;
- break;
- }
- if (COPYIN(arg, &req, sizeof(req))) {
- error = EFAULT;
- break;
- }
- error = pcibr_slot_shutdown(pcibr_vhdl, &req);
- break;
- }
- case PCIBR_SLOT_QUERY:
- {
- struct pcibr_slot_req_s req;
- if (!cap_able(CAP_DEVICE_MGT)) {
- error = EPERM;
- break;
- }
- if (COPYIN(arg, &req, sizeof(req))) {
- error = EFAULT;
- break;
- }
- error = pcibr_slot_query(pcibr_vhdl, &req);
- break;
- }
- #endif /* LATER */
- default:
- break;
- }
- return error;
- }
- void
- pcibr_freeblock_sub(iopaddr_t *free_basep,
- iopaddr_t *free_lastp,
- iopaddr_t base,
- size_t size)
- {
- iopaddr_t free_base = *free_basep;
- iopaddr_t free_last = *free_lastp;
- iopaddr_t last = base + size - 1;
- if ((last < free_base) || (base > free_last)); /* free block outside arena */
- else if ((base <= free_base) && (last >= free_last))
- /* free block contains entire arena */
- *free_basep = *free_lastp = 0;
- else if (base <= free_base)
- /* free block is head of arena */
- *free_basep = last + 1;
- else if (last >= free_last)
- /* free block is tail of arena */
- *free_lastp = base - 1;
- /*
- * We are left with two regions: the free area
- * in the arena "below" the block, and the free
- * area in the arena "above" the block. Keep
- * the one that is bigger.
- */
- else if ((base - free_base) > (free_last - last))
- *free_lastp = base - 1; /* keep lower chunk */
- else
- *free_basep = last + 1; /* keep upper chunk */
- }
- pcibr_info_t
- pcibr_info_get(devfs_handle_t vhdl)
- {
- return (pcibr_info_t) pciio_info_get(vhdl);
- }
- pcibr_info_t
- pcibr_device_info_new(
- pcibr_soft_t pcibr_soft,
- pciio_slot_t slot,
- pciio_function_t rfunc,
- pciio_vendor_id_t vendor,
- pciio_device_id_t device)
- {
- pcibr_info_t pcibr_info;
- pciio_function_t func;
- int ibit;
- func = (rfunc == PCIIO_FUNC_NONE) ? 0 : rfunc;
- NEW(pcibr_info);
- pciio_device_info_new(&pcibr_info->f_c,
- pcibr_soft->bs_vhdl,
- slot, rfunc,
- vendor, device);
- /* pfg - this is new ..... */
- /* Set PCI bus number */
- pcibr_info->f_bus = io_path_map_widget(pcibr_soft->bs_vhdl);
- if (slot != PCIIO_SLOT_NONE) {
- /*
- * Currently favored mapping from PCI
- * slot number and INTA/B/C/D to Bridge
- * PCI Interrupt Bit Number:
- *
- * SLOT A B C D
- * 0 0 4 0 4
- * 1 1 5 1 5
- * 2 2 6 2 6
- * 3 3 7 3 7
- * 4 4 0 4 0
- * 5 5 1 5 1
- * 6 6 2 6 2
- * 7 7 3 7 3
- *
- * XXX- allow pcibr_hints to override default
- * XXX- allow ADMIN to override pcibr_hints
- */
- for (ibit = 0; ibit < 4; ++ibit)
- pcibr_info->f_ibit[ibit] =
- (slot + 4 * ibit) & 7;
- /*
- * Record the info in the sparse func info space.
- */
- if (func < pcibr_soft->bs_slot[slot].bss_ninfo)
- pcibr_soft->bs_slot[slot].bss_infos[func] = pcibr_info;
- }
- return pcibr_info;
- }
- /* FIXME: for now this is needed by both pcibr.c and
- * pcibr_slot.c. Need to find a better way, the least
- * of which would be to move it to pcibr_private.h
- */
- /*
- * PCI_ADDR_SPACE_LIMITS_STORE
- * Sets the current values of
- * pci io base,
- * pci io last,
- * pci low memory base,
- * pci low memory last,
- * pci high memory base,
- * pci high memory last
- */
- #define PCI_ADDR_SPACE_LIMITS_STORE()
- pcibr_soft->bs_spinfo.pci_io_base = pci_io_fb;
- pcibr_soft->bs_spinfo.pci_io_last = pci_io_fl;
- pcibr_soft->bs_spinfo.pci_swin_base = pci_lo_fb;
- pcibr_soft->bs_spinfo.pci_swin_last = pci_lo_fl;
- pcibr_soft->bs_spinfo.pci_mem_base = pci_hi_fb;
- pcibr_soft->bs_spinfo.pci_mem_last = pci_hi_fl;
- /*
- * pcibr_device_unregister
- * This frees up any hardware resources reserved for this PCI device
- * and removes any PCI infrastructural information setup for it.
- * This is usually used at the time of shutting down of the PCI card.
- */
- int
- pcibr_device_unregister(devfs_handle_t pconn_vhdl)
- {
- pciio_info_t pciio_info;
- devfs_handle_t pcibr_vhdl;
- pciio_slot_t slot;
- pcibr_soft_t pcibr_soft;
- bridge_t *bridge;
- int count_vchan0, count_vchan1;
- unsigned s;
- int error_call;
- int error = 0;
- pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_vhdl = pciio_info_master_get(pciio_info);
- slot = pciio_info_slot_get(pciio_info);
- pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- bridge = pcibr_soft->bs_base;
- /* Clear all the hardware xtalk resources for this device */
- xtalk_widgetdev_shutdown(pcibr_soft->bs_conn, slot);
- /* Flush all the rrbs */
- pcibr_rrb_flush(pconn_vhdl);
- /*
- * If the RRB configuration for this slot has changed, set it
- * back to the boot-time default
- */
- if (pcibr_soft->bs_rrb_valid_dflt[slot] >= 0) {
- s = pcibr_lock(pcibr_soft);
- /* Free the rrbs allocated to this slot */
- error_call = do_pcibr_rrb_free(bridge, slot,
- pcibr_soft->bs_rrb_valid[slot] +
- pcibr_soft->bs_rrb_valid[slot +
- PCIBR_RRB_SLOT_VIRTUAL]);
- if (error_call)
- error = ERANGE;
-
- pcibr_soft->bs_rrb_res[slot] = pcibr_soft->bs_rrb_res[slot] +
- pcibr_soft->bs_rrb_valid[slot] +
- pcibr_soft->bs_rrb_valid[slot +
- PCIBR_RRB_SLOT_VIRTUAL];
- count_vchan0 = pcibr_soft->bs_rrb_valid_dflt[slot];
- count_vchan1 = pcibr_soft->bs_rrb_valid_dflt[slot +
- PCIBR_RRB_SLOT_VIRTUAL];
- pcibr_unlock(pcibr_soft, s);
- pcibr_rrb_alloc(pconn_vhdl, &count_vchan0, &count_vchan1);
- }
- /* Flush the write buffers !! */
- error_call = pcibr_wrb_flush(pconn_vhdl);
- if (error_call)
- error = error_call;
- /* Clear the information specific to the slot */
- error_call = pcibr_slot_info_free(pcibr_vhdl, slot);
- if (error_call)
- error = error_call;
- return(error);
-
- }
- /*
- * pcibr_driver_reg_callback
- * CDL will call this function for each device found in the PCI
- * registry that matches the vendor/device IDs supported by
- * the driver being registered. The device's connection vertex
- * and the driver's attach function return status enable the
- * slot's device status to be set.
- */
- void
- pcibr_driver_reg_callback(devfs_handle_t pconn_vhdl,
- int key1, int key2, int error)
- {
- pciio_info_t pciio_info;
- pcibr_info_t pcibr_info;
- devfs_handle_t pcibr_vhdl;
- pciio_slot_t slot;
- pcibr_soft_t pcibr_soft;
- /* Do not set slot status for vendor/device ID wildcard drivers */
- if ((key1 == -1) || (key2 == -1))
- return;
- pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_info = pcibr_info_get(pconn_vhdl);
- pcibr_vhdl = pciio_info_master_get(pciio_info);
- slot = pciio_info_slot_get(pciio_info);
- pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- /* This may be a loadable driver so lock out any pciconfig actions */
- mrlock(pcibr_soft->bs_bus_lock, MR_UPDATE, PZERO);
- pcibr_info->f_att_det_error = error;
- pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK;
- if (error) {
- pcibr_soft->bs_slot[slot].slot_status |= SLOT_STARTUP_INCMPLT;
- } else {
- pcibr_soft->bs_slot[slot].slot_status |= SLOT_STARTUP_CMPLT;
- }
-
- /* Release the bus lock */
- mrunlock(pcibr_soft->bs_bus_lock);
- }
- /*
- * pcibr_driver_unreg_callback
- * CDL will call this function for each device found in the PCI
- * registry that matches the vendor/device IDs supported by
- * the driver being unregistered. The device's connection vertex
- * and the driver's detach function return status enable the
- * slot's device status to be set.
- */
- void
- pcibr_driver_unreg_callback(devfs_handle_t pconn_vhdl,
- int key1, int key2, int error)
- {
- pciio_info_t pciio_info;
- pcibr_info_t pcibr_info;
- devfs_handle_t pcibr_vhdl;
- pciio_slot_t slot;
- pcibr_soft_t pcibr_soft;
- /* Do not set slot status for vendor/device ID wildcard drivers */
- if ((key1 == -1) || (key2 == -1))
- return;
- pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_info = pcibr_info_get(pconn_vhdl);
- pcibr_vhdl = pciio_info_master_get(pciio_info);
- slot = pciio_info_slot_get(pciio_info);
- pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- /* This may be a loadable driver so lock out any pciconfig actions */
- mrlock(pcibr_soft->bs_bus_lock, MR_UPDATE, PZERO);
- pcibr_info->f_att_det_error = error;
- pcibr_soft->bs_slot[slot].slot_status &= ~SLOT_STATUS_MASK;
- if (error) {
- pcibr_soft->bs_slot[slot].slot_status |= SLOT_SHUTDOWN_INCMPLT;
- } else {
- pcibr_soft->bs_slot[slot].slot_status |= SLOT_SHUTDOWN_CMPLT;
- }
-
- /* Release the bus lock */
- mrunlock(pcibr_soft->bs_bus_lock);
- }
- /*
- * build a convenience link path in the
- * form of ".../<iobrick>/bus/<busnum>"
- *
- * returns 1 on success, 0 otherwise
- *
- * depends on hwgraph separator == '/'
- */
- int
- pcibr_bus_cnvlink(devfs_handle_t f_c, int slot)
- {
- char dst[MAXDEVNAME];
- char *dp = dst;
- char *cp, *xp;
- int widgetnum;
- char pcibus[8];
- devfs_handle_t nvtx, svtx;
- int rv;
- #if DEBUG
- printk("pcibr_bus_cnvlink: slot= %d f_c= %pn",
- slot, f_c);
- {
- int pos;
- char dname[256];
- pos = devfs_generate_path(f_c, dname, 256);
- printk("%s : path= %sn", __FUNCTION__, &dname[pos]);
- }
- #endif
- if (GRAPH_SUCCESS != hwgraph_vertex_name_get(f_c, dst, MAXDEVNAME))
- return 0;
- /* dst example == /hw/module/001c02/Pbrick/xtalk/8/pci/direct */
- /* find the widget number */
- xp = strstr(dst, "/"EDGE_LBL_XTALK"/");
- if (xp == NULL)
- return 0;
- widgetnum = atoi(xp+7);
- if (widgetnum < XBOW_PORT_8 || widgetnum > XBOW_PORT_F)
- return 0;
- /* remove "/pci/direct" from path */
- cp = strstr(dst, "/" EDGE_LBL_PCI "/" "direct");
- if (cp == NULL)
- return 0;
- *cp = (char)NULL;
- /* get the vertex for the widget */
- if (GRAPH_SUCCESS != hwgraph_traverse(NULL, dp, &svtx))
- return 0;
- *xp = (char)NULL; /* remove "/xtalk/..." from path */
- /* dst example now == /hw/module/001c02/Pbrick */
- /* get the bus number */
- strcat(dst, "/bus");
- sprintf(pcibus, "%d", p_busnum[widgetnum]);
- /* link to bus to widget */
- rv = hwgraph_path_add(NULL, dp, &nvtx);
- if (GRAPH_SUCCESS == rv)
- rv = hwgraph_edge_add(nvtx, svtx, pcibus);
- return (rv == GRAPH_SUCCESS);
- }
- /*
- * pcibr_attach: called every time the crosstalk
- * infrastructure is asked to initialize a widget
- * that matches the part number we handed to the
- * registration routine above.
- */
- /*ARGSUSED */
- int
- pcibr_attach(devfs_handle_t xconn_vhdl)
- {
- /* REFERENCED */
- graph_error_t rc;
- devfs_handle_t pcibr_vhdl;
- devfs_handle_t ctlr_vhdl;
- bridge_t *bridge = NULL;
- bridgereg_t id;
- int rev;
- pcibr_soft_t pcibr_soft;
- pcibr_info_t pcibr_info;
- xwidget_info_t info;
- xtalk_intr_t xtalk_intr;
- device_desc_t dev_desc = (device_desc_t)0;
- int slot;
- int ibit;
- devfs_handle_t noslot_conn;
- char devnm[MAXDEVNAME], *s;
- pcibr_hints_t pcibr_hints;
- bridgereg_t b_int_enable;
- unsigned rrb_fixed = 0;
- iopaddr_t pci_io_fb, pci_io_fl;
- iopaddr_t pci_lo_fb, pci_lo_fl;
- iopaddr_t pci_hi_fb, pci_hi_fl;
- int spl_level;
- #ifdef LATER
- char *nicinfo = (char *)0;
- #endif
- #if PCI_FBBE
- int fast_back_to_back_enable;
- #endif
- l1sc_t *scp;
- nasid_t nasid;
- async_attach_t aa = NULL;
- aa = async_attach_get_info(xconn_vhdl);
- #if DEBUG && ATTACH_DEBUG
- printk("pcibr_attach: xconn_vhdl= %pn", xconn_vhdl);
- {
- int pos;
- char dname[256];
- pos = devfs_generate_path(xconn_vhdl, dname, 256);
- printk("%s : path= %s n", __FUNCTION__, &dname[pos]);
- }
- #endif
- /* Setup the PRB for the bridge in CONVEYOR BELT
- * mode. PRBs are setup in default FIRE-AND-FORGET
- * mode during the initialization.
- */
- hub_device_flags_set(xconn_vhdl, HUB_PIO_CONVEYOR);
- bridge = (bridge_t *)
- xtalk_piotrans_addr(xconn_vhdl, NULL,
- 0, sizeof(bridge_t), 0);
- /*
- * Create the vertex for the PCI bus, which we
- * will also use to hold the pcibr_soft and
- * which will be the "master" vertex for all the
- * pciio connection points we will hang off it.
- * This needs to happen before we call nic_bridge_vertex_info
- * as we are some of the *_vmc functions need access to the edges.
- *
- * Opening this vertex will provide access to
- * the Bridge registers themselves.
- */
- rc = hwgraph_path_add(xconn_vhdl, EDGE_LBL_PCI, &pcibr_vhdl);
- ASSERT(rc == GRAPH_SUCCESS);
- ctlr_vhdl = NULL;
- ctlr_vhdl = hwgraph_register(pcibr_vhdl, EDGE_LBL_CONTROLLER,
- 0, DEVFS_FL_AUTO_DEVNUM,
- 0, 0,
- S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP, 0, 0,
- &pcibr_fops, NULL);
- ASSERT(ctlr_vhdl != NULL);
- /*
- * decode the nic, and hang its stuff off our
- * connection point where other drivers can get
- * at it.
- */
- #ifdef LATER
- nicinfo = BRIDGE_VERTEX_MFG_INFO(xconn_vhdl, (nic_data_t) & bridge->b_nic);
- #endif
- /*
- * Get the hint structure; if some NIC callback
- * marked this vertex as "hands-off" then we
- * just return here, before doing anything else.
- */
- pcibr_hints = pcibr_hints_get(xconn_vhdl, 0);
- if (pcibr_hints && pcibr_hints->ph_hands_off)
- return -1; /* generic operations disabled */
- id = bridge->b_wid_id;
- rev = XWIDGET_PART_REV_NUM(id);
- hwgraph_info_add_LBL(pcibr_vhdl, INFO_LBL_PCIBR_ASIC_REV, (arbitrary_info_t) rev);
- /*
- * allocate soft state structure, fill in some
- * fields, and hook it up to our vertex.
- */
- NEW(pcibr_soft);
- BZERO(pcibr_soft, sizeof *pcibr_soft);
- pcibr_soft_set(pcibr_vhdl, pcibr_soft);
- pcibr_soft->bs_conn = xconn_vhdl;
- pcibr_soft->bs_vhdl = pcibr_vhdl;
- pcibr_soft->bs_base = bridge;
- pcibr_soft->bs_rev_num = rev;
- pcibr_soft->bs_intr_bits = pcibr_intr_bits;
- if (is_xbridge(bridge)) {
- pcibr_soft->bs_int_ate_size = XBRIDGE_INTERNAL_ATES;
- pcibr_soft->bs_xbridge = 1;
- } else {
- pcibr_soft->bs_int_ate_size = BRIDGE_INTERNAL_ATES;
- pcibr_soft->bs_xbridge = 0;
- }
- nasid = NASID_GET(bridge);
- scp = &NODEPDA( NASID_TO_COMPACT_NODEID(nasid) )->module->elsc;
- pcibr_soft->bs_l1sc = scp;
- pcibr_soft->bs_moduleid = iobrick_module_get(scp);
- pcibr_soft->bsi_err_intr = 0;
- /* Bridges up through REV C
- * are unable to set the direct
- * byteswappers to BYTE_STREAM.
- */
- if (pcibr_soft->bs_rev_num <= BRIDGE_PART_REV_C) {
- pcibr_soft->bs_pio_end_io = PCIIO_WORD_VALUES;
- pcibr_soft->bs_pio_end_mem = PCIIO_WORD_VALUES;
- }
- #if PCIBR_SOFT_LIST
- {
- pcibr_list_p self;
- NEW(self);
- self->bl_soft = pcibr_soft;
- self->bl_vhdl = pcibr_vhdl;
- self->bl_next = pcibr_list;
- self->bl_next = swap_ptr((void **) &pcibr_list, (void *)self);
- }
- #endif
- /*
- * get the name of this bridge vertex and keep the info. Use this
- * only where it is really needed now: like error interrupts.
- */
- s = dev_to_name(pcibr_vhdl, devnm, MAXDEVNAME);
- pcibr_soft->bs_name = kmalloc(strlen(s) + 1, GFP_KERNEL);
- strcpy(pcibr_soft->bs_name, s);
- #if SHOW_REVS || DEBUG
- #if !DEBUG
- if (kdebug)
- #endif
- printk("%sBridge ASIC: rev %s (code=0x%x) at %sn",
- is_xbridge(bridge) ? "X" : "",
- (rev == BRIDGE_PART_REV_A) ? "A" :
- (rev == BRIDGE_PART_REV_B) ? "B" :
- (rev == BRIDGE_PART_REV_C) ? "C" :
- (rev == BRIDGE_PART_REV_D) ? "D" :
- (rev == XBRIDGE_PART_REV_A) ? "A" :
- (rev == XBRIDGE_PART_REV_B) ? "B" :
- "unknown",
- rev, pcibr_soft->bs_name);
- #endif
- info = xwidget_info_get(xconn_vhdl);
- pcibr_soft->bs_xid = xwidget_info_id_get(info);
- pcibr_soft->bs_master = xwidget_info_master_get(info);
- pcibr_soft->bs_mxid = xwidget_info_masterid_get(info);
- /*
- * Init bridge lock.
- */
- spin_lock_init(&pcibr_soft->bs_lock);
- /*
- * If we have one, process the hints structure.
- */
- if (pcibr_hints) {
- rrb_fixed = pcibr_hints->ph_rrb_fixed;
- pcibr_soft->bs_rrb_fixed = rrb_fixed;
- if (pcibr_hints->ph_intr_bits)
- pcibr_soft->bs_intr_bits = pcibr_hints->ph_intr_bits;
- for (slot = 0; slot < 8; ++slot) {
- int hslot = pcibr_hints->ph_host_slot[slot] - 1;
- if (hslot < 0) {
- pcibr_soft->bs_slot[slot].host_slot = slot;
- } else {
- pcibr_soft->bs_slot[slot].has_host = 1;
- pcibr_soft->bs_slot[slot].host_slot = hslot;
- }
- }
- }
- /*
- * set up initial values for state fields
- */
- for (slot = 0; slot < 8; ++slot) {
- pcibr_soft->bs_slot[slot].bss_devio.bssd_space = PCIIO_SPACE_NONE;
- pcibr_soft->bs_slot[slot].bss_d64_base = PCIBR_D64_BASE_UNSET;
- pcibr_soft->bs_slot[slot].bss_d32_base = PCIBR_D32_BASE_UNSET;
- pcibr_soft->bs_slot[slot].bss_ext_ates_active = ATOMIC_INIT(0);
- }
- for (ibit = 0; ibit < 8; ++ibit) {
- pcibr_soft->bs_intr[ibit].bsi_xtalk_intr = 0;
- pcibr_soft->bs_intr[ibit].bsi_pcibr_intr_wrap.iw_soft = pcibr_soft;
- pcibr_soft->bs_intr[ibit].bsi_pcibr_intr_wrap.iw_list = NULL;
- pcibr_soft->bs_intr[ibit].bsi_pcibr_intr_wrap.iw_stat =
- &(bridge->b_int_status);
- pcibr_soft->bs_intr[ibit].bsi_pcibr_intr_wrap.iw_hdlrcnt = 0;
- pcibr_soft->bs_intr[ibit].bsi_pcibr_intr_wrap.iw_shared = 0;
- pcibr_soft->bs_intr[ibit].bsi_pcibr_intr_wrap.iw_connected = 0;
- }
- /*
- * Initialize various Bridge registers.
- */
- /*
- * On pre-Rev.D bridges, set the PCI_RETRY_CNT
- * to zero to avoid dropping stores. (#475347)
- */
- if (rev < BRIDGE_PART_REV_D)
- bridge->b_bus_timeout &= ~BRIDGE_BUS_PCI_RETRY_MASK;
- /*
- * Clear all pending interrupts.
- */
- bridge->b_int_rst_stat = (BRIDGE_IRR_ALL_CLR);
- /*
- * Until otherwise set up,
- * assume all interrupts are
- * from slot 7.
- */
- bridge->b_int_device = (uint32_t) 0xffffffff;
- {
- bridgereg_t dirmap;
- paddr_t paddr;
- iopaddr_t xbase;
- xwidgetnum_t xport;
- iopaddr_t offset;
- int num_entries = 0;
- int entry;
- cnodeid_t cnodeid;
- nasid_t nasid;
- /* Set the Bridge's 32-bit PCI to XTalk
- * Direct Map register to the most useful
- * value we can determine. Note that we
- * must use a single xid for all of:
- * direct-mapped 32-bit DMA accesses
- * direct-mapped 64-bit DMA accesses
- * DMA accesses through the PMU
- * interrupts
- * This is the only way to guarantee that
- * completion interrupts will reach a CPU
- * after all DMA data has reached memory.
- * (Of course, there may be a few special
- * drivers/controlers that explicitly manage
- * this ordering problem.)
- */
- cnodeid = 0; /* default node id */
- nasid = COMPACT_TO_NASID_NODEID(cnodeid);
- paddr = NODE_OFFSET(nasid) + 0;
- /* currently, we just assume that if we ask
- * for a DMA mapping to "zero" the XIO
- * host will transmute this into a request
- * for the lowest hunk of memory.
- */
- xbase = xtalk_dmatrans_addr(xconn_vhdl, 0,
- paddr, _PAGESZ, 0);
- if (xbase != XIO_NOWHERE) {
- if (XIO_PACKED(xbase)) {
- xport = XIO_PORT(xbase);
- xbase = XIO_ADDR(xbase);
- } else
- xport = pcibr_soft->bs_mxid;
- offset = xbase & ((1ull << BRIDGE_DIRMAP_OFF_ADDRSHFT) - 1ull);
- xbase >>= BRIDGE_DIRMAP_OFF_ADDRSHFT;
- dirmap = xport << BRIDGE_DIRMAP_W_ID_SHFT;
- if (xbase)
- dirmap |= BRIDGE_DIRMAP_OFF & xbase;
- else if (offset >= (512 << 20))
- dirmap |= BRIDGE_DIRMAP_ADD512;
- bridge->b_dir_map = dirmap;
- }
- /*
- * Set bridge's idea of page size according to the system's
- * idea of "IO page size". TBD: The idea of IO page size
- * should really go away.
- */
- /*
- * ensure that we write and read without any interruption.
- * The read following the write is required for the Bridge war
- */
- spl_level = splhi();
- #if IOPGSIZE == 4096
- bridge->b_wid_control &= ~BRIDGE_CTRL_PAGE_SIZE;
- #elif IOPGSIZE == 16384
- bridge->b_wid_control |= BRIDGE_CTRL_PAGE_SIZE;
- #else
- <<<Unable to deal with IOPGSIZE >>>;
- #endif
- bridge->b_wid_control; /* inval addr bug war */
- splx(spl_level);
- /* Initialize internal mapping entries */
- for (entry = 0; entry < pcibr_soft->bs_int_ate_size; entry++) {
- bridge->b_int_ate_ram[entry].wr = 0;
- }
- /*
- * Determine if there's external mapping SSRAM on this
- * bridge. Set up Bridge control register appropriately,
- * inititlize SSRAM, and set software up to manage RAM
- * entries as an allocatable resource.
- *
- * Currently, we just use the rm* routines to manage ATE
- * allocation. We should probably replace this with a
- * Best Fit allocator.
- *
- * For now, if we have external SSRAM, avoid using
- * the internal ssram: we can't turn PREFETCH on
- * when we use the internal SSRAM; and besides,
- * this also guarantees that no allocation will
- * straddle the internal/external line, so we
- * can increment ATE write addresses rather than
- * recomparing against BRIDGE_INTERNAL_ATES every
- * time.
- */
- if (is_xbridge(bridge))
- num_entries = 0;
- else
- num_entries = pcibr_init_ext_ate_ram(bridge);
- /* we always have 128 ATEs (512 for Xbridge) inside the chip
- * even if disabled for debugging.
- */
- pcibr_soft->bs_int_ate_map = rmallocmap(pcibr_soft->bs_int_ate_size);
- pcibr_ate_free(pcibr_soft, 0, pcibr_soft->bs_int_ate_size);
- #if PCIBR_ATE_DEBUG
- printk("pcibr_attach: %d INTERNAL ATEsn", pcibr_soft->bs_int_ate_size);
- #endif
- if (num_entries > pcibr_soft->bs_int_ate_size) {
- #if PCIBR_ATE_NOTBOTH /* for debug -- forces us to use external ates */
- printk("pcibr_attach: disabling internal ATEs.n");
- pcibr_ate_alloc(pcibr_soft, pcibr_soft->bs_int_ate_size);
- #endif
- pcibr_soft->bs_ext_ate_map = rmallocmap(num_entries);
- pcibr_ate_free(pcibr_soft, pcibr_soft->bs_int_ate_size,
- num_entries - pcibr_soft->bs_int_ate_size);
- #if PCIBR_ATE_DEBUG
- printk("pcibr_attach: %d EXTERNAL ATEsn",
- num_entries - pcibr_soft->bs_int_ate_size);
- #endif
- }
- }
- {
- bridgereg_t dirmap;
- iopaddr_t xbase;
- /*
- * now figure the *real* xtalk base address
- * that dirmap sends us to.
- */
- dirmap = bridge->b_dir_map;
- if (dirmap & BRIDGE_DIRMAP_OFF)
- xbase = (iopaddr_t)(dirmap & BRIDGE_DIRMAP_OFF)
- << BRIDGE_DIRMAP_OFF_ADDRSHFT;
- else if (dirmap & BRIDGE_DIRMAP_ADD512)
- xbase = 512 << 20;
- else
- xbase = 0;
- pcibr_soft->bs_dir_xbase = xbase;
- /* it is entirely possible that we may, at this
- * point, have our dirmap pointing somewhere
- * other than our "master" port.
- */
- pcibr_soft->bs_dir_xport =
- (dirmap & BRIDGE_DIRMAP_W_ID) >> BRIDGE_DIRMAP_W_ID_SHFT;
- }
- /* pcibr sources an error interrupt;
- * figure out where to send it.
- *
- * If any interrupts are enabled in bridge,
- * then the prom set us up and our interrupt
- * has already been reconnected in mlreset
- * above.
- *
- * Need to set the D_INTR_ISERR flag
- * in the dev_desc used for allocating the
- * error interrupt, so our interrupt will
- * be properly routed and prioritized.
- *
- * If our crosstalk provider wants to
- * fix widget error interrupts to specific
- * destinations, D_INTR_ISERR is how it
- * knows to do this.
- */
- xtalk_intr = xtalk_intr_alloc(xconn_vhdl, dev_desc, pcibr_vhdl);
- ASSERT(xtalk_intr != NULL);
- pcibr_soft->bsi_err_intr = xtalk_intr;
- /*
- * On IP35 with XBridge, we do some extra checks in pcibr_setwidint
- * in order to work around some addressing limitations. In order
- * for that fire wall to work properly, we need to make sure we
- * start from a known clean state.
- */
- pcibr_clearwidint(bridge);
- xtalk_intr_connect(xtalk_intr, (xtalk_intr_setfunc_t)pcibr_setwidint, (void *)bridge);
- /*
- * now we can start handling error interrupts;
- * enable all of them.
- * NOTE: some PCI ints may already be enabled.
- */
- b_int_enable = bridge->b_int_enable | BRIDGE_ISR_ERRORS;
- bridge->b_int_enable = b_int_enable;
- bridge->b_int_mode = 0; /* do not send "clear interrupt" packets */
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- /*
- * Depending on the rev of bridge, disable certain features.
- * Easiest way seems to be to force the PCIBR_NOwhatever
- * flag to be on for all DMA calls, which overrides any
- * PCIBR_whatever flag or even the setting of whatever
- * from the PCIIO_DMA_class flags (or even from the other
- * PCIBR flags, since NO overrides YES).
- */
- pcibr_soft->bs_dma_flags = 0;
- /* PREFETCH:
- * Always completely disabled for REV.A;
- * at "pcibr_prefetch_enable_rev", anyone
- * asking for PCIIO_PREFETCH gets it.
- * Between these two points, you have to ask
- * for PCIBR_PREFETCH, which promises that
- * your driver knows about known Bridge WARs.
- */
- if (pcibr_soft->bs_rev_num < BRIDGE_PART_REV_B)
- pcibr_soft->bs_dma_flags |= PCIBR_NOPREFETCH;
- else if (pcibr_soft->bs_rev_num <
- (BRIDGE_WIDGET_PART_NUM << 4 | pcibr_prefetch_enable_rev))
- pcibr_soft->bs_dma_flags |= PCIIO_NOPREFETCH;
- /* WRITE_GATHER:
- * Disabled up to but not including the
- * rev number in pcibr_wg_enable_rev. There
- * is no "WAR range" as with prefetch.
- */
- if (pcibr_soft->bs_rev_num <
- (BRIDGE_WIDGET_PART_NUM << 4 | pcibr_wg_enable_rev))
- pcibr_soft->bs_dma_flags |= PCIBR_NOWRITE_GATHER;
- pciio_provider_register(pcibr_vhdl, &pcibr_provider);
- pciio_provider_startup(pcibr_vhdl);
- pci_io_fb = 0x00000004; /* I/O FreeBlock Base */
- pci_io_fl = 0xFFFFFFFF; /* I/O FreeBlock Last */
- pci_lo_fb = 0x00000010; /* Low Memory FreeBlock Base */
- pci_lo_fl = 0x001FFFFF; /* Low Memory FreeBlock Last */
- pci_hi_fb = 0x00200000; /* High Memory FreeBlock Base */
- pci_hi_fl = 0x3FFFFFFF; /* High Memory FreeBlock Last */
- PCI_ADDR_SPACE_LIMITS_STORE();
- /* build "no-slot" connection point
- */
- pcibr_info = pcibr_device_info_new
- (pcibr_soft, PCIIO_SLOT_NONE, PCIIO_FUNC_NONE,
- PCIIO_VENDOR_ID_NONE, PCIIO_DEVICE_ID_NONE);
- noslot_conn = pciio_device_info_register
- (pcibr_vhdl, &pcibr_info->f_c);
- /* Remember the no slot connection point info for tearing it
- * down during detach.
- */
- pcibr_soft->bs_noslot_conn = noslot_conn;
- pcibr_soft->bs_noslot_info = pcibr_info;
- #if PCI_FBBE
- fast_back_to_back_enable = 1;
- #endif
- #if PCI_FBBE
- if (fast_back_to_back_enable) {
- /*
- * All devices on the bus are capable of fast back to back, so
- * we need to set the fast back to back bit in all devices on
- * the bus that are capable of doing such accesses.
- */
- }
- #endif
- #ifdef LATER
- /* If the bridge has been reset then there is no need to reset
- * the individual PCI slots.
- */
- for (slot = 0; slot < 8; ++slot)
- /* Reset all the slots */
- (void)pcibr_slot_reset(pcibr_vhdl, slot);
- #endif
- for (slot = 0; slot < 8; ++slot)
- /* Find out what is out there */
- (void)pcibr_slot_info_init(pcibr_vhdl,slot);
- for (slot = 0; slot < 8; ++slot)
- /* Set up the address space for this slot in the pci land */
- (void)pcibr_slot_addr_space_init(pcibr_vhdl,slot);
- for (slot = 0; slot < 8; ++slot)
- /* Setup the device register */
- (void)pcibr_slot_device_init(pcibr_vhdl, slot);
- for (slot = 0; slot < 8; ++slot)
- /* Setup host/guest relations */
- (void)pcibr_slot_guest_info_init(pcibr_vhdl,slot);
- for (slot = 0; slot < 8; ++slot)
- /* Initial RRB management */
- (void)pcibr_slot_initial_rrb_alloc(pcibr_vhdl,slot);
- /* driver attach routines should be called out from generic linux code */
- for (slot = 0; slot < 8; ++slot)
- /* Call the device attach */
- (void)pcibr_slot_call_device_attach(pcibr_vhdl, slot, 0);
- /*
- * Each Pbrick PCI bus only has slots 1 and 2. Similarly for
- * widget 0xe on Ibricks. Allocate RRB's accordingly.
- */
- if (pcibr_soft->bs_moduleid > 0) {
- switch (MODULE_GET_BTCHAR(pcibr_soft->bs_moduleid)) {
- case 'p': /* Pbrick */
- do_pcibr_rrb_autoalloc(pcibr_soft, 1, 8);
- do_pcibr_rrb_autoalloc(pcibr_soft, 2, 8);
- break;
- case 'i': /* Ibrick */
- /* port 0xe on the Ibrick only has slots 1 and 2 */
- if (pcibr_soft->bs_xid == 0xe) {
- do_pcibr_rrb_autoalloc(pcibr_soft, 1, 8);
- do_pcibr_rrb_autoalloc(pcibr_soft, 2, 8);
- }
- else {
- /* allocate one RRB for the serial port */
- do_pcibr_rrb_autoalloc(pcibr_soft, 0, 1);
- }
- break;
- } /* switch */
- }
- #ifdef LATER
- if (strstr(nicinfo, XTALK_PCI_PART_NUM)) {
- do_pcibr_rrb_autoalloc(pcibr_soft, 1, 8);
- #if PCIBR_RRB_DEBUG
- printf("nnFound XTALK_PCI (030-1275) at %vn", xconn_vhdl);
- printf("pcibr_attach: %v Shoebox RRB MANAGEMENT: %d+%d freen",
- pcibr_vhdl,
- pcibr_soft->bs_rrb_avail[0],
- pcibr_soft->bs_rrb_avail[1]);
- for (slot = 0; slot < 8; ++slot)
- printf("t%d+%d+%d",
- 0xFFF & pcibr_soft->bs_rrb_valid[slot],
- 0xFFF & pcibr_soft->bs_rrb_valid[slot + PCIBR_RRB_SLOT_VIRTUAL],
- pcibr_soft->bs_rrb_res[slot]);
- printf("n");
- #endif
- }
- #else
- FIXME("pcibr_attach: Call do_pcibr_rrb_autoalloc nicinfon");
- #endif
- if (aa)
- async_attach_add_info(noslot_conn, aa);
- pciio_device_attach(noslot_conn, 0);
- /*
- * Tear down pointer to async attach info -- async threads for
- * bridge's descendants may be running but the bridge's work is done.
- */
- if (aa)
- async_attach_del_info(xconn_vhdl);
- return 0;
- }
- /*
- * pcibr_detach:
- * Detach the bridge device from the hwgraph after cleaning out all the
- * underlying vertices.
- */
- int
- pcibr_detach(devfs_handle_t xconn)
- {
- pciio_slot_t slot;
- devfs_handle_t pcibr_vhdl;
- pcibr_soft_t pcibr_soft;
- bridge_t *bridge;
- /* Get the bridge vertex from its xtalk connection point */
- if (hwgraph_traverse(xconn, EDGE_LBL_PCI, &pcibr_vhdl) != GRAPH_SUCCESS)
- return(1);
- pcibr_soft = pcibr_soft_get(pcibr_vhdl);
- bridge = pcibr_soft->bs_base;
- /* Disable the interrupts from the bridge */
- bridge->b_int_enable = 0;
- /* Detach all the PCI devices talking to this bridge */
- for(slot = 0; slot < 8; slot++) {
- #ifdef DEBUG
- printk("pcibr_device_detach called for %p/%dn",
- pcibr_vhdl,slot);
- #endif
- pcibr_slot_detach(pcibr_vhdl, slot, 0);
- }
- /* Unregister the no-slot connection point */
- pciio_device_info_unregister(pcibr_vhdl,
- &(pcibr_soft->bs_noslot_info->f_c));
- spin_lock_destroy(&pcibr_soft->bs_lock);
- kfree(pcibr_soft->bs_name);
-
- /* Error handler gets unregistered when the widget info is
- * cleaned
- */
- /* Free the soft ATE maps */
- if (pcibr_soft->bs_int_ate_map)
- rmfreemap(pcibr_soft->bs_int_ate_map);
- if (pcibr_soft->bs_ext_ate_map)
- rmfreemap(pcibr_soft->bs_ext_ate_map);
- /* Disconnect the error interrupt and free the xtalk resources
- * associated with it.
- */
- xtalk_intr_disconnect(pcibr_soft->bsi_err_intr);
- xtalk_intr_free(pcibr_soft->bsi_err_intr);
- /* Clear the software state maintained by the bridge driver for this
- * bridge.
- */
- DEL(pcibr_soft);
- /* Remove the Bridge revision labelled info */
- (void)hwgraph_info_remove_LBL(pcibr_vhdl, INFO_LBL_PCIBR_ASIC_REV, NULL);
- /* Remove the character device associated with this bridge */
- (void)hwgraph_edge_remove(pcibr_vhdl, EDGE_LBL_CONTROLLER, NULL);
- /* Remove the PCI bridge vertex */
- (void)hwgraph_edge_remove(xconn, EDGE_LBL_PCI, NULL);
- return(0);
- }
- int
- pcibr_asic_rev(devfs_handle_t pconn_vhdl)
- {
- devfs_handle_t pcibr_vhdl;
- arbitrary_info_t ainfo;
- if (GRAPH_SUCCESS !=
- hwgraph_traverse(pconn_vhdl, EDGE_LBL_MASTER, &pcibr_vhdl))
- return -1;
- if (GRAPH_SUCCESS !=
- hwgraph_info_get_LBL(pcibr_vhdl, INFO_LBL_PCIBR_ASIC_REV, &ainfo))
- return -1;
- return (int) ainfo;
- }
- int
- pcibr_write_gather_flush(devfs_handle_t pconn_vhdl)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- pciio_slot_t slot;
- slot = pciio_info_slot_get(pciio_info);
- pcibr_device_write_gather_flush(pcibr_soft, slot);
- return 0;
- }
- /* =====================================================================
- * PIO MANAGEMENT
- */
- static iopaddr_t
- pcibr_addr_pci_to_xio(devfs_handle_t pconn_vhdl,
- pciio_slot_t slot,
- pciio_space_t space,
- iopaddr_t pci_addr,
- size_t req_size,
- unsigned flags)
- {
- pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
- pciio_info_t pciio_info = &pcibr_info->f_c;
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- bridge_t *bridge = pcibr_soft->bs_base;
- unsigned bar; /* which BASE reg on device is decoding */
- iopaddr_t xio_addr = XIO_NOWHERE;
- pciio_space_t wspace; /* which space device is decoding */
- iopaddr_t wbase; /* base of device decode on PCI */
- size_t wsize; /* size of device decode on PCI */
- int try; /* DevIO(x) window scanning order control */
- int win; /* which DevIO(x) window is being used */
- pciio_space_t mspace; /* target space for devio(x) register */
- iopaddr_t mbase; /* base of devio(x) mapped area on PCI */
- size_t msize; /* size of devio(x) mapped area on PCI */
- size_t mmask; /* addr bits stored in Device(x) */
- unsigned long s;
- s = pcibr_lock(pcibr_soft);
- if (pcibr_soft->bs_slot[slot].has_host) {
- slot = pcibr_soft->bs_slot[slot].host_slot;
- pcibr_info = pcibr_soft->bs_slot[slot].bss_infos[0];
- }
- if (space == PCIIO_SPACE_NONE)
- goto done;
- if (space == PCIIO_SPACE_CFG) {
- /*
- * Usually, the first mapping
- * established to a PCI device
- * is to its config space.
- *
- * In any case, we definitely
- * do NOT need to worry about
- * PCI BASE registers, and
- * MUST NOT attempt to point
- * the DevIO(x) window at
- * this access ...
- */
- if (((flags & PCIIO_BYTE_STREAM) == 0) &&
- ((pci_addr + req_size) <= BRIDGE_TYPE0_CFG_FUNC_OFF))
- xio_addr = pci_addr + BRIDGE_TYPE0_CFG_DEV(slot);
- goto done;
- }
- if (space == PCIIO_SPACE_ROM) {
- /* PIO to the Expansion Rom.
- * Driver is responsible for
- * enabling and disabling
- * decodes properly.
- */
- wbase = pcibr_info->f_rbase;
- wsize = pcibr_info->f_rsize;
- /*
- * While the driver should know better
- * than to attempt to map more space
- * than the device is decoding, he might
- * do it; better to bail out here.
- */
- if ((pci_addr + req_size) > wsize)
- goto done;
- pci_addr += wbase;
- space = PCIIO_SPACE_MEM;
- }
- /*
- * reduce window mappings to raw
- * space mappings (maybe allocating
- * windows), and try for DevIO(x)
- * usage (setting it if it is available).
- */
- bar = space - PCIIO_SPACE_WIN0;
- if (bar < 6) {
- wspace = pcibr_info->f_window[bar].w_space;
- if (wspace == PCIIO_SPACE_NONE)
- goto done;
- /* get PCI base and size */
- wbase = pcibr_info->f_window[bar].w_base;
- wsize = pcibr_info->f_window[bar].w_size;
- /*
- * While the driver should know better
- * than to attempt to map more space
- * than the device is decoding, he might
- * do it; better to bail out here.
- */
- if ((pci_addr + req_size) > wsize)
- goto done;
- /* shift from window relative to
- * decoded space relative.
- */
- pci_addr += wbase;
- space = wspace;
- } else
- bar = -1;
- /* Scan all the DevIO(x) windows twice looking for one
- * that can satisfy our request. The first time through,
- * only look at assigned windows; the second time, also
- * look at PCIIO_SPACE_NONE windows. Arrange the order
- * so we always look at our own window first.
- *
- * We will not attempt to satisfy a single request
- * by concatinating multiple windows.
- */
- for (try = 0; try < 16; ++try) {
- bridgereg_t devreg;
- unsigned offset;
- win = (try + slot) % 8;
- /* If this DevIO(x) mapping area can provide
- * a mapping to this address, use it.
- */
- msize = (win < 2) ? 0x200000 : 0x100000;
- mmask = -msize;
- if (space != PCIIO_SPACE_IO)
- mmask &= 0x3FFFFFFF;
- offset = pci_addr & (msize - 1);
- /* If this window can't possibly handle that request,
- * go on to the next window.
- */
- if (((pci_addr & (msize - 1)) + req_size) > msize)
- continue;
- devreg = pcibr_soft->bs_slot[win].bss_device;
- /* Is this window "nailed down"?
- * If not, maybe we can use it.
- * (only check this the second time through)
- */
- mspace = pcibr_soft->bs_slot[win].bss_devio.bssd_space;
- if ((try > 7) && (mspace == PCIIO_SPACE_NONE)) {
- /* If this is the primary DevIO(x) window
- * for some other device, skip it.
- */
- if ((win != slot) &&
- (PCIIO_VENDOR_ID_NONE !=
- pcibr_soft->bs_slot[win].bss_vendor_id))
- continue;
- /* It's a free window, and we fit in it.
- * Set up Device(win) to our taste.
- */
- mbase = pci_addr & mmask;
- /* check that we would really get from
- * here to there.
- */
- if ((mbase | offset) != pci_addr)
- continue;
- devreg &= ~BRIDGE_DEV_OFF_MASK;
- if (space != PCIIO_SPACE_IO)
- devreg |= BRIDGE_DEV_DEV_IO_MEM;
- else
- devreg &= ~BRIDGE_DEV_DEV_IO_MEM;
- devreg |= (mbase >> 20) & BRIDGE_DEV_OFF_MASK;
- /* default is WORD_VALUES.
- * if you specify both,
- * operation is undefined.
- */
- if (flags & PCIIO_BYTE_STREAM)
- devreg |= BRIDGE_DEV_DEV_SWAP;
- else
- devreg &= ~BRIDGE_DEV_DEV_SWAP;
- if (pcibr_soft->bs_slot[win].bss_device != devreg) {
- bridge->b_device[win].reg = devreg;
- pcibr_soft->bs_slot[win].bss_device = devreg;
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- #if DEBUG && PCI_DEBUG
- printk("pcibr Device(%d): 0x%lxn", win, bridge->b_device[win].reg);
- #endif
- }
- pcibr_soft->bs_slot[win].bss_devio.bssd_space = space;
- pcibr_soft->bs_slot[win].bss_devio.bssd_base = mbase;
- xio_addr = BRIDGE_DEVIO(win) + (pci_addr - mbase);
- #if DEBUG && PCI_DEBUG
- printk("%s LINE %d map to space %d space desc 0x%x[%lx..%lx] for slot %d allocates DevIO(%d) devreg 0x%xn",
- __FUNCTION__, __LINE__, space, space_desc,
- pci_addr, pci_addr + req_size - 1,
- slot, win, devreg);
- #endif
- goto done;
- } /* endif DevIO(x) not pointed */
- mbase = pcibr_soft->bs_slot[win].bss_devio.bssd_base;
- /* Now check for request incompat with DevIO(x)
- */
- if ((mspace != space) ||
- (pci_addr < mbase) ||
- ((pci_addr + req_size) > (mbase + msize)) ||
- ((flags & PCIIO_BYTE_STREAM) && !(devreg & BRIDGE_DEV_DEV_SWAP)) ||
- (!(flags & PCIIO_BYTE_STREAM) && (devreg & BRIDGE_DEV_DEV_SWAP)))
- continue;
- /* DevIO(x) window is pointed at PCI space
- * that includes our target. Calculate the
- * final XIO address, release the lock and
- * return.
- */
- xio_addr = BRIDGE_DEVIO(win) + (pci_addr - mbase);
- #if DEBUG && PCI_DEBUG
- printk("%s LINE %d map to space %d [0x%p..0x%p] for slot %d uses DevIO(%d)n",
- __FUNCTION__, __LINE__, space, pci_addr, pci_addr + req_size - 1, slot, win);
- #endif
- goto done;
- }
- switch (space) {
- /*
- * Accesses to device decode
- * areas that do a not fit
- * within the DevIO(x) space are
- * modified to be accesses via
- * the direct mapping areas.
- *
- * If necessary, drivers can
- * explicitly ask for mappings
- * into these address spaces,
- * but this should never be needed.
- */
- case PCIIO_SPACE_MEM: /* "mem space" */
- case PCIIO_SPACE_MEM32: /* "mem, use 32-bit-wide bus" */
- if ((pci_addr + BRIDGE_PCI_MEM32_BASE + req_size - 1) <=
- BRIDGE_PCI_MEM32_LIMIT)
- xio_addr = pci_addr + BRIDGE_PCI_MEM32_BASE;
- break;
- case PCIIO_SPACE_MEM64: /* "mem, use 64-bit-wide bus" */
- if ((pci_addr + BRIDGE_PCI_MEM64_BASE + req_size - 1) <=
- BRIDGE_PCI_MEM64_LIMIT)
- xio_addr = pci_addr + BRIDGE_PCI_MEM64_BASE;
- break;
- case PCIIO_SPACE_IO: /* "i/o space" */
- /* Bridge Hardware Bug WAR #482741:
- * The 4G area that maps directly from
- * XIO space to PCI I/O space is busted
- * until Bridge Rev D.
- */
- if ((pcibr_soft->bs_rev_num > BRIDGE_PART_REV_C) &&
- ((pci_addr + BRIDGE_PCI_IO_BASE + req_size - 1) <=
- BRIDGE_PCI_IO_LIMIT))
- xio_addr = pci_addr + BRIDGE_PCI_IO_BASE;
- break;
- }
- /* Check that "Direct PIO" byteswapping matches,
- * try to change it if it does not.
- */
- if (xio_addr != XIO_NOWHERE) {
- unsigned bst; /* nonzero to set bytestream */
- unsigned *bfp; /* addr of record of how swapper is set */
- unsigned swb; /* which control bit to mung */
- unsigned bfo; /* current swapper setting */
- unsigned bfn; /* desired swapper setting */
- bfp = ((space == PCIIO_SPACE_IO)
- ? (&pcibr_soft->bs_pio_end_io)
- : (&pcibr_soft->bs_pio_end_mem));
- bfo = *bfp;
- bst = flags & PCIIO_BYTE_STREAM;
- bfn = bst ? PCIIO_BYTE_STREAM : PCIIO_WORD_VALUES;
- if (bfn == bfo) { /* we already match. */
- ;
- } else if (bfo != 0) { /* we have a conflict. */
- #if DEBUG && PCI_DEBUG
- printk("pcibr_addr_pci_to_xio: swap conflict in space %d , was%s%s, want%s%sn",
- space,
- bfo & PCIIO_BYTE_STREAM ? " BYTE_STREAM" : "",
- bfo & PCIIO_WORD_VALUES ? " WORD_VALUES" : "",
- bfn & PCIIO_BYTE_STREAM ? " BYTE_STREAM" : "",
- bfn & PCIIO_WORD_VALUES ? " WORD_VALUES" : "");
- #endif
- xio_addr = XIO_NOWHERE;
- } else { /* OK to make the change. */
- bridgereg_t octl, nctl;
- swb = (space == PCIIO_SPACE_IO) ? BRIDGE_CTRL_IO_SWAP : BRIDGE_CTRL_MEM_SWAP;
- octl = bridge->b_wid_control;
- nctl = bst ? octl | swb : octl & ~swb;
- if (octl != nctl) /* make the change if any */
- bridge->b_wid_control = nctl;
- *bfp = bfn; /* record the assignment */
- #if DEBUG && PCI_DEBUG
- printk("pcibr_addr_pci_to_xio: swap for space %d set to%s%sn",
- space,
- bfn & PCIIO_BYTE_STREAM ? " BYTE_STREAM" : "",
- bfn & PCIIO_WORD_VALUES ? " WORD_VALUES" : "");
- #endif
- }
- }
- done:
- pcibr_unlock(pcibr_soft, s);
- return xio_addr;
- }
- /*ARGSUSED6 */
- pcibr_piomap_t
- pcibr_piomap_alloc(devfs_handle_t pconn_vhdl,
- device_desc_t dev_desc,
- pciio_space_t space,
- iopaddr_t pci_addr,
- size_t req_size,
- size_t req_size_max,
- unsigned flags)
- {
- pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
- pciio_info_t pciio_info = &pcibr_info->f_c;
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- pcibr_piomap_t *mapptr;
- pcibr_piomap_t maplist;
- pcibr_piomap_t pcibr_piomap;
- iopaddr_t xio_addr;
- xtalk_piomap_t xtalk_piomap;
- unsigned long s;
- /* Make sure that the req sizes are non-zero */
- if ((req_size < 1) || (req_size_max < 1))
- return NULL;
- /*
- * Code to translate slot/space/addr
- * into xio_addr is common between
- * this routine and pcibr_piotrans_addr.
- */
- xio_addr = pcibr_addr_pci_to_xio(pconn_vhdl, pciio_slot, space, pci_addr, req_size, flags);
- if (xio_addr == XIO_NOWHERE)
- return NULL;
- /* Check the piomap list to see if there is already an allocated
- * piomap entry but not in use. If so use that one. Otherwise
- * allocate a new piomap entry and add it to the piomap list
- */
- mapptr = &(pcibr_info->f_piomap);
- s = pcibr_lock(pcibr_soft);
- for (pcibr_piomap = *mapptr;
- pcibr_piomap != NULL;
- pcibr_piomap = pcibr_piomap->bp_next) {
- if (pcibr_piomap->bp_mapsz == 0)
- break;
- }
- if (pcibr_piomap)
- mapptr = NULL;
- else {
- pcibr_unlock(pcibr_soft, s);
- NEW(pcibr_piomap);
- }
- pcibr_piomap->bp_dev = pconn_vhdl;
- pcibr_piomap->bp_slot = pciio_slot;
- pcibr_piomap->bp_flags = flags;
- pcibr_piomap->bp_space = space;
- pcibr_piomap->bp_pciaddr = pci_addr;
- pcibr_piomap->bp_mapsz = req_size;
- pcibr_piomap->bp_soft = pcibr_soft;
- pcibr_piomap->bp_toc[0] = ATOMIC_INIT(0);
- if (mapptr) {
- s = pcibr_lock(pcibr_soft);
- maplist = *mapptr;
- pcibr_piomap->bp_next = maplist;
- *mapptr = pcibr_piomap;
- }
- pcibr_unlock(pcibr_soft, s);
- if (pcibr_piomap) {
- xtalk_piomap =
- xtalk_piomap_alloc(xconn_vhdl, 0,
- xio_addr,
- req_size, req_size_max,
- flags & PIOMAP_FLAGS);
- if (xtalk_piomap) {
- pcibr_piomap->bp_xtalk_addr = xio_addr;
- pcibr_piomap->bp_xtalk_pio = xtalk_piomap;
- } else {
- pcibr_piomap->bp_mapsz = 0;
- pcibr_piomap = 0;
- }
- }
- return pcibr_piomap;
- }
- /*ARGSUSED */
- void
- pcibr_piomap_free(pcibr_piomap_t pcibr_piomap)
- {
- xtalk_piomap_free(pcibr_piomap->bp_xtalk_pio);
- pcibr_piomap->bp_xtalk_pio = 0;
- pcibr_piomap->bp_mapsz = 0;
- }
- /*ARGSUSED */
- caddr_t
- pcibr_piomap_addr(pcibr_piomap_t pcibr_piomap,
- iopaddr_t pci_addr,
- size_t req_size)
- {
- return xtalk_piomap_addr(pcibr_piomap->bp_xtalk_pio,
- pcibr_piomap->bp_xtalk_addr +
- pci_addr - pcibr_piomap->bp_pciaddr,
- req_size);
- }
- /*ARGSUSED */
- void
- pcibr_piomap_done(pcibr_piomap_t pcibr_piomap)
- {
- xtalk_piomap_done(pcibr_piomap->bp_xtalk_pio);
- }
- /*ARGSUSED */
- caddr_t
- pcibr_piotrans_addr(devfs_handle_t pconn_vhdl,
- device_desc_t dev_desc,
- pciio_space_t space,
- iopaddr_t pci_addr,
- size_t req_size,
- unsigned flags)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- iopaddr_t xio_addr;
- xio_addr = pcibr_addr_pci_to_xio(pconn_vhdl, pciio_slot, space, pci_addr, req_size, flags);
- if (xio_addr == XIO_NOWHERE)
- return NULL;
- return xtalk_piotrans_addr(xconn_vhdl, 0, xio_addr, req_size, flags & PIOMAP_FLAGS);
- }
- /*
- * PIO Space allocation and management.
- * Allocate and Manage the PCI PIO space (mem and io space)
- * This routine is pretty simplistic at this time, and
- * does pretty trivial management of allocation and freeing..
- * The current scheme is prone for fragmentation..
- * Change the scheme to use bitmaps.
- */
- /*ARGSUSED */
- iopaddr_t
- pcibr_piospace_alloc(devfs_handle_t pconn_vhdl,
- device_desc_t dev_desc,
- pciio_space_t space,
- size_t req_size,
- size_t alignment)
- {
- pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
- pciio_info_t pciio_info = &pcibr_info->f_c;
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- pciio_piospace_t piosp;
- unsigned long s;
- iopaddr_t *pciaddr, *pcilast;
- iopaddr_t start_addr;
- size_t align_mask;
- /*
- * Check for proper alignment
- */
- ASSERT(alignment >= NBPP);
- ASSERT((alignment & (alignment - 1)) == 0);
- align_mask = alignment - 1;
- s = pcibr_lock(pcibr_soft);
- /*
- * First look if a previously allocated chunk exists.
- */
- if ((piosp = pcibr_info->f_piospace)) {
- /*
- * Look through the list for a right sized free chunk.
- */
- do {
- if (piosp->free &&
- (piosp->space == space) &&
- (piosp->count >= req_size) &&
- !(piosp->start & align_mask)) {
- piosp->free = 0;
- pcibr_unlock(pcibr_soft, s);
- return piosp->start;
- }
- piosp = piosp->next;
- } while (piosp);
- }
- ASSERT(!piosp);
- switch (space) {
- case PCIIO_SPACE_IO:
- pciaddr = &pcibr_soft->bs_spinfo.pci_io_base;
- pcilast = &pcibr_soft->bs_spinfo.pci_io_last;
- break;
- case PCIIO_SPACE_MEM:
- case PCIIO_SPACE_MEM32:
- pciaddr = &pcibr_soft->bs_spinfo.pci_mem_base;
- pcilast = &pcibr_soft->bs_spinfo.pci_mem_last;
- break;
- default:
- ASSERT(0);
- pcibr_unlock(pcibr_soft, s);
- return 0;
- }
- start_addr = *pciaddr;
- /*
- * Align start_addr.
- */
- if (start_addr & align_mask)
- start_addr = (start_addr + align_mask) & ~align_mask;
- if ((start_addr + req_size) > *pcilast) {
- /*
- * If too big a request, reject it.
- */
- pcibr_unlock(pcibr_soft, s);
- return 0;
- }
- *pciaddr = (start_addr + req_size);
- NEW(piosp);
- piosp->free = 0;
- piosp->space = space;
- piosp->start = start_addr;
- piosp->count = req_size;
- piosp->next = pcibr_info->f_piospace;
- pcibr_info->f_piospace = piosp;
- pcibr_unlock(pcibr_soft, s);
- return start_addr;
- }
- /*ARGSUSED */
- void
- pcibr_piospace_free(devfs_handle_t pconn_vhdl,
- pciio_space_t space,
- iopaddr_t pciaddr,
- size_t req_size)
- {
- pcibr_info_t pcibr_info = pcibr_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pcibr_info->f_mfast;
- pciio_piospace_t piosp;
- unsigned long s;
- char name[1024];
- /*
- * Look through the bridge data structures for the pciio_piospace_t
- * structure corresponding to 'pciaddr'
- */
- s = pcibr_lock(pcibr_soft);
- piosp = pcibr_info->f_piospace;
- while (piosp) {
- /*
- * Piospace free can only be for the complete
- * chunk and not parts of it..
- */
- if (piosp->start == pciaddr) {
- if (piosp->count == req_size)
- break;
- /*
- * Improper size passed for freeing..
- * Print a message and break;
- */
- hwgraph_vertex_name_get(pconn_vhdl, name, 1024);
- printk(KERN_WARNING "pcibr_piospace_free: error");
- printk(KERN_WARNING "Device %s freeing size (0x%lx) different than allocated (0x%lx)",
- name, req_size, piosp->count);
- printk(KERN_WARNING "Freeing 0x%lx instead", piosp->count);
- break;
- }
- piosp = piosp->next;
- }
- if (!piosp) {
- printk(KERN_WARNING
- "pcibr_piospace_free: Address 0x%lx size 0x%lx - No matchn",
- pciaddr, req_size);
- pcibr_unlock(pcibr_soft, s);
- return;
- }
- piosp->free = 1;
- pcibr_unlock(pcibr_soft, s);
- return;
- }
- /* =====================================================================
- * DMA MANAGEMENT
- *
- * The Bridge ASIC provides three methods of doing
- * DMA: via a "direct map" register available in
- * 32-bit PCI space (which selects a contiguous 2G
- * address space on some other widget), via
- * "direct" addressing via 64-bit PCI space (all
- * destination information comes from the PCI
- * address, including transfer attributes), and via
- * a "mapped" region that allows a bunch of
- * different small mappings to be established with
- * the PMU.
- *
- * For efficiency, we most prefer to use the 32-bit
- * direct mapping facility, since it requires no
- * resource allocations. The advantage of using the
- * PMU over the 64-bit direct is that single-cycle
- * PCI addressing can be used; the advantage of
- * using 64-bit direct over PMU addressing is that
- * we do not have to allocate entries in the PMU.
- */
- /*
- * Convert PCI-generic software flags and Bridge-specific software flags
- * into Bridge-specific Direct Map attribute bits.
- */
- static iopaddr_t
- pcibr_flags_to_d64(unsigned flags, pcibr_soft_t pcibr_soft)
- {
- iopaddr_t attributes = 0;
- /* Sanity check: Bridge only allows use of VCHAN1 via 64-bit addrs */
- #ifdef LATER
- ASSERT_ALWAYS(!(flags & PCIBR_VCHAN1) || (flags & PCIIO_DMA_A64));
- #endif
- /* Generic macro flags
- */
- if (flags & PCIIO_DMA_DATA) { /* standard data channel */
- attributes &= ~PCI64_ATTR_BAR; /* no barrier bit */
- attributes |= PCI64_ATTR_PREF; /* prefetch on */
- }
- if (flags & PCIIO_DMA_CMD) { /* standard command channel */
- attributes |= PCI64_ATTR_BAR; /* barrier bit on */
- attributes &= ~PCI64_ATTR_PREF; /* disable prefetch */
- }
- /* Generic detail flags
- */
- if (flags & PCIIO_PREFETCH)
- attributes |= PCI64_ATTR_PREF;
- if (flags & PCIIO_NOPREFETCH)
- attributes &= ~PCI64_ATTR_PREF;
- /* the swap bit is in the address attributes for xbridge */
- if (pcibr_soft->bs_xbridge) {
- if (flags & PCIIO_BYTE_STREAM)
- attributes |= PCI64_ATTR_SWAP;
- if (flags & PCIIO_WORD_VALUES)
- attributes &= ~PCI64_ATTR_SWAP;
- }
- /* Provider-specific flags
- */
- if (flags & PCIBR_BARRIER)
- attributes |= PCI64_ATTR_BAR;
- if (flags & PCIBR_NOBARRIER)
- attributes &= ~PCI64_ATTR_BAR;
- if (flags & PCIBR_PREFETCH)
- attributes |= PCI64_ATTR_PREF;
- if (flags & PCIBR_NOPREFETCH)
- attributes &= ~PCI64_ATTR_PREF;
- if (flags & PCIBR_PRECISE)
- attributes |= PCI64_ATTR_PREC;
- if (flags & PCIBR_NOPRECISE)
- attributes &= ~PCI64_ATTR_PREC;
- if (flags & PCIBR_VCHAN1)
- attributes |= PCI64_ATTR_VIRTUAL;
- if (flags & PCIBR_VCHAN0)
- attributes &= ~PCI64_ATTR_VIRTUAL;
- return (attributes);
- }
- /*ARGSUSED */
- pcibr_dmamap_t
- pcibr_dmamap_alloc(devfs_handle_t pconn_vhdl,
- device_desc_t dev_desc,
- size_t req_size_max,
- unsigned flags)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- pciio_slot_t slot;
- xwidgetnum_t xio_port;
- xtalk_dmamap_t xtalk_dmamap;
- pcibr_dmamap_t pcibr_dmamap;
- int ate_count;
- int ate_index;
- /* merge in forced flags */
- flags |= pcibr_soft->bs_dma_flags;
- /*
- * On SNIA64, these maps are pre-allocated because pcibr_dmamap_alloc()
- * can be called within an interrupt thread.
- */
- pcibr_dmamap = (pcibr_dmamap_t)get_free_pciio_dmamap(pcibr_soft->bs_vhdl);
- if (!pcibr_dmamap)
- return 0;
- xtalk_dmamap = xtalk_dmamap_alloc(xconn_vhdl, dev_desc, req_size_max,
- flags & DMAMAP_FLAGS);
- if (!xtalk_dmamap) {
- #if PCIBR_ATE_DEBUG
- printk("pcibr_attach: xtalk_dmamap_alloc failedn");
- #endif
- free_pciio_dmamap(pcibr_dmamap);
- return 0;
- }
- xio_port = pcibr_soft->bs_mxid;
- slot = pciio_info_slot_get(pciio_info);
- pcibr_dmamap->bd_dev = pconn_vhdl;
- pcibr_dmamap->bd_slot = slot;
- pcibr_dmamap->bd_soft = pcibr_soft;
- pcibr_dmamap->bd_xtalk = xtalk_dmamap;
- pcibr_dmamap->bd_max_size = req_size_max;
- pcibr_dmamap->bd_xio_port = xio_port;
- if (flags & PCIIO_DMA_A64) {
- if (!pcibr_try_set_device(pcibr_soft, slot, flags, BRIDGE_DEV_D64_BITS)) {
- iopaddr_t pci_addr;
- int have_rrbs;
- int min_rrbs;
- /* Device is capable of A64 operations,
- * and the attributes of the DMA are
- * consistant with any previous DMA
- * mappings using shared resources.
- */
- pci_addr = pcibr_flags_to_d64(flags, pcibr_soft);
- pcibr_dmamap->bd_flags = flags;
- pcibr_dmamap->bd_xio_addr = 0;
- pcibr_dmamap->bd_pci_addr = pci_addr;
- /* Make sure we have an RRB (or two).
- */
- if (!(pcibr_soft->bs_rrb_fixed & (1 << slot))) {
- if (flags & PCIBR_VCHAN1)
- slot += PCIBR_RRB_SLOT_VIRTUAL;
- have_rrbs = pcibr_soft->bs_rrb_valid[slot];
- if (have_rrbs < 2) {
- if (pci_addr & PCI64_ATTR_PREF)
- min_rrbs = 2;
- else
- min_rrbs = 1;
- if (have_rrbs < min_rrbs)
- do_pcibr_rrb_autoalloc(pcibr_soft, slot, min_rrbs - have_rrbs);
- }
- }
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: using direct64n");
- #endif
- return pcibr_dmamap;
- }
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: unable to use direct64n");
- #endif
- flags &= ~PCIIO_DMA_A64;
- }
- if (flags & PCIIO_FIXED) {
- /* warning: mappings may fail later,
- * if direct32 can't get to the address.
- */
- if (!pcibr_try_set_device(pcibr_soft, slot, flags, BRIDGE_DEV_D32_BITS)) {
- /* User desires DIRECT A32 operations,
- * and the attributes of the DMA are
- * consistant with any previous DMA
- * mappings using shared resources.
- * Mapping calls may fail if target
- * is outside the direct32 range.
- */
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: using direct32n");
- #endif
- pcibr_dmamap->bd_flags = flags;
- pcibr_dmamap->bd_xio_addr = pcibr_soft->bs_dir_xbase;
- pcibr_dmamap->bd_pci_addr = PCI32_DIRECT_BASE;
- return pcibr_dmamap;
- }
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: unable to use direct32n");
- #endif
- /* If the user demands FIXED and we can't
- * give it to him, fail.
- */
- xtalk_dmamap_free(xtalk_dmamap);
- free_pciio_dmamap(pcibr_dmamap);
- return 0;
- }
- /*
- * Allocate Address Translation Entries from the mapping RAM.
- * Unless the PCIBR_NO_ATE_ROUNDUP flag is specified,
- * the maximum number of ATEs is based on the worst-case
- * scenario, where the requested target is in the
- * last byte of an ATE; thus, mapping IOPGSIZE+2
- * does end up requiring three ATEs.
- */
- if (!(flags & PCIBR_NO_ATE_ROUNDUP)) {
- ate_count = IOPG((IOPGSIZE - 1) /* worst case start offset */
- +req_size_max /* max mapping bytes */
- - 1) + 1; /* round UP */
- } else { /* assume requested target is page aligned */
- ate_count = IOPG(req_size_max /* max mapping bytes */
- - 1) + 1; /* round UP */
- }
- ate_index = pcibr_ate_alloc(pcibr_soft, ate_count);
- if (ate_index != -1) {
- if (!pcibr_try_set_device(pcibr_soft, slot, flags, BRIDGE_DEV_PMU_BITS)) {
- bridge_ate_t ate_proto;
- int have_rrbs;
- int min_rrbs;
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: using PMUn");
- #endif
- ate_proto = pcibr_flags_to_ate(flags);
- pcibr_dmamap->bd_flags = flags;
- pcibr_dmamap->bd_pci_addr =
- PCI32_MAPPED_BASE + IOPGSIZE * ate_index;
- /*
- * for xbridge the byte-swap bit == bit 29 of PCI address
- */
- if (pcibr_soft->bs_xbridge) {
- if (flags & PCIIO_BYTE_STREAM)
- ATE_SWAP_ON(pcibr_dmamap->bd_pci_addr);
- /*
- * If swap was set in bss_device in pcibr_endian_set()
- * we need to change the address bit.
- */
- if (pcibr_soft->bs_slot[slot].bss_device &
- BRIDGE_DEV_SWAP_PMU)
- ATE_SWAP_ON(pcibr_dmamap->bd_pci_addr);
- if (flags & PCIIO_WORD_VALUES)
- ATE_SWAP_OFF(pcibr_dmamap->bd_pci_addr);
- }
- pcibr_dmamap->bd_xio_addr = 0;
- pcibr_dmamap->bd_ate_ptr = pcibr_ate_addr(pcibr_soft, ate_index);
- pcibr_dmamap->bd_ate_index = ate_index;
- pcibr_dmamap->bd_ate_count = ate_count;
- pcibr_dmamap->bd_ate_proto = ate_proto;
- /* Make sure we have an RRB (or two).
- */
- if (!(pcibr_soft->bs_rrb_fixed & (1 << slot))) {
- have_rrbs = pcibr_soft->bs_rrb_valid[slot];
- if (have_rrbs < 2) {
- if (ate_proto & ATE_PREF)
- min_rrbs = 2;
- else
- min_rrbs = 1;
- if (have_rrbs < min_rrbs)
- do_pcibr_rrb_autoalloc(pcibr_soft, slot, min_rrbs - have_rrbs);
- }
- }
- if (ate_index >= pcibr_soft->bs_int_ate_size &&
- !pcibr_soft->bs_xbridge) {
- bridge_t *bridge = pcibr_soft->bs_base;
- volatile unsigned *cmd_regp;
- unsigned cmd_reg;
- unsigned long s;
- pcibr_dmamap->bd_flags |= PCIBR_DMAMAP_SSRAM;
- s = pcibr_lock(pcibr_soft);
- cmd_regp = &(bridge->
- b_type0_cfg_dev[slot].
- l[PCI_CFG_COMMAND / 4]);
- cmd_reg = *cmd_regp;
- pcibr_soft->bs_slot[slot].bss_cmd_pointer = cmd_regp;
- pcibr_soft->bs_slot[slot].bss_cmd_shadow = cmd_reg;
- pcibr_unlock(pcibr_soft, s);
- }
- return pcibr_dmamap;
- }
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: unable to use PMUn");
- #endif
- pcibr_ate_free(pcibr_soft, ate_index, ate_count);
- }
- /* total failure: sorry, you just can't
- * get from here to there that way.
- */
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_alloc: complete failure.n");
- #endif
- xtalk_dmamap_free(xtalk_dmamap);
- free_pciio_dmamap(pcibr_dmamap);
- return 0;
- }
- /*ARGSUSED */
- void
- pcibr_dmamap_free(pcibr_dmamap_t pcibr_dmamap)
- {
- pcibr_soft_t pcibr_soft = pcibr_dmamap->bd_soft;
- pciio_slot_t slot = pcibr_dmamap->bd_slot;
- unsigned flags = pcibr_dmamap->bd_flags;
- /* Make sure that bss_ext_ates_active
- * is properly kept up to date.
- */
- if (PCIBR_DMAMAP_BUSY & flags)
- if (PCIBR_DMAMAP_SSRAM & flags)
- atomic_dec(&(pcibr_soft->bs_slot[slot]. bss_ext_ates_active));
- xtalk_dmamap_free(pcibr_dmamap->bd_xtalk);
- if (pcibr_dmamap->bd_flags & PCIIO_DMA_A64) {
- pcibr_release_device(pcibr_soft, slot, BRIDGE_DEV_D64_BITS);
- }
- if (pcibr_dmamap->bd_ate_count) {
- pcibr_ate_free(pcibr_dmamap->bd_soft,
- pcibr_dmamap->bd_ate_index,
- pcibr_dmamap->bd_ate_count);
- pcibr_release_device(pcibr_soft, slot, BRIDGE_DEV_PMU_BITS);
- }
- free_pciio_dmamap(pcibr_dmamap);
- }
- /*
- * pcibr_addr_xio_to_pci: given a PIO range, hand
- * back the corresponding base PCI MEM address;
- * this is used to short-circuit DMA requests that
- * loop back onto this PCI bus.
- */
- static iopaddr_t
- pcibr_addr_xio_to_pci(pcibr_soft_t soft,
- iopaddr_t xio_addr,
- size_t req_size)
- {
- iopaddr_t xio_lim = xio_addr + req_size - 1;
- iopaddr_t pci_addr;
- pciio_slot_t slot;
- if ((xio_addr >= BRIDGE_PCI_MEM32_BASE) &&
- (xio_lim <= BRIDGE_PCI_MEM32_LIMIT)) {
- pci_addr = xio_addr - BRIDGE_PCI_MEM32_BASE;
- return pci_addr;
- }
- if ((xio_addr >= BRIDGE_PCI_MEM64_BASE) &&
- (xio_lim <= BRIDGE_PCI_MEM64_LIMIT)) {
- pci_addr = xio_addr - BRIDGE_PCI_MEM64_BASE;
- return pci_addr;
- }
- for (slot = 0; slot < 8; ++slot)
- if ((xio_addr >= BRIDGE_DEVIO(slot)) &&
- (xio_lim < BRIDGE_DEVIO(slot + 1))) {
- bridgereg_t dev;
- dev = soft->bs_slot[slot].bss_device;
- pci_addr = dev & BRIDGE_DEV_OFF_MASK;
- pci_addr <<= BRIDGE_DEV_OFF_ADDR_SHFT;
- pci_addr += xio_addr - BRIDGE_DEVIO(slot);
- return (dev & BRIDGE_DEV_DEV_IO_MEM) ? pci_addr : PCI_NOWHERE;
- }
- return 0;
- }
- /*ARGSUSED */
- iopaddr_t
- pcibr_dmamap_addr(pcibr_dmamap_t pcibr_dmamap,
- paddr_t paddr,
- size_t req_size)
- {
- pcibr_soft_t pcibr_soft;
- iopaddr_t xio_addr;
- xwidgetnum_t xio_port;
- iopaddr_t pci_addr;
- unsigned flags;
- ASSERT(pcibr_dmamap != NULL);
- ASSERT(req_size > 0);
- ASSERT(req_size <= pcibr_dmamap->bd_max_size);
- pcibr_soft = pcibr_dmamap->bd_soft;
- flags = pcibr_dmamap->bd_flags;
- xio_addr = xtalk_dmamap_addr(pcibr_dmamap->bd_xtalk, paddr, req_size);
- if (XIO_PACKED(xio_addr)) {
- xio_port = XIO_PORT(xio_addr);
- xio_addr = XIO_ADDR(xio_addr);
- } else
- xio_port = pcibr_dmamap->bd_xio_port;
- /* If this DMA is to an address that
- * refers back to this Bridge chip,
- * reduce it back to the correct
- * PCI MEM address.
- */
- if (xio_port == pcibr_soft->bs_xid) {
- pci_addr = pcibr_addr_xio_to_pci(pcibr_soft, xio_addr, req_size);
- } else if (flags & PCIIO_DMA_A64) {
- /* A64 DMA:
- * always use 64-bit direct mapping,
- * which always works.
- * Device(x) was set up during
- * dmamap allocation.
- */
- /* attributes are already bundled up into bd_pci_addr.
- */
- pci_addr = pcibr_dmamap->bd_pci_addr
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT)
- | xio_addr;
- /* Bridge Hardware WAR #482836:
- * If the transfer is not cache aligned
- * and the Bridge Rev is <= B, force
- * prefetch to be off.
- */
- if (flags & PCIBR_NOPREFETCH)
- pci_addr &= ~PCI64_ATTR_PREF;
- #if DEBUG && PCIBR_DMA_DEBUG
- printk("pcibr_dmamap_addr (direct64):n"
- "twanted paddr [0x%x..0x%x]n"
- "tXIO port 0x%x offset 0x%xn"
- "treturning PCI 0x%xn",
- paddr, paddr + req_size - 1,
- xio_port, xio_addr, pci_addr);
- #endif
- } else if (flags & PCIIO_FIXED) {
- /* A32 direct DMA:
- * always use 32-bit direct mapping,
- * which may fail.
- * Device(x) was set up during
- * dmamap allocation.
- */
- if (xio_port != pcibr_soft->bs_dir_xport)
- pci_addr = 0; /* wrong DIDN */
- else if (xio_addr < pcibr_dmamap->bd_xio_addr)
- pci_addr = 0; /* out of range */
- else if ((xio_addr + req_size) >
- (pcibr_dmamap->bd_xio_addr + BRIDGE_DMA_DIRECT_SIZE))
- pci_addr = 0; /* out of range */
- else
- pci_addr = pcibr_dmamap->bd_pci_addr +
- xio_addr - pcibr_dmamap->bd_xio_addr;
- #if DEBUG && PCIBR_DMA_DEBUG
- printk("pcibr_dmamap_addr (direct32):n"
- "twanted paddr [0x%x..0x%x]n"
- "tXIO port 0x%x offset 0x%xn"
- "treturning PCI 0x%xn",
- paddr, paddr + req_size - 1,
- xio_port, xio_addr, pci_addr);
- #endif
- } else {
- bridge_t *bridge = pcibr_soft->bs_base;
- iopaddr_t offset = IOPGOFF(xio_addr);
- bridge_ate_t ate_proto = pcibr_dmamap->bd_ate_proto;
- int ate_count = IOPG(offset + req_size - 1) + 1;
- int ate_index = pcibr_dmamap->bd_ate_index;
- unsigned cmd_regs[8];
- unsigned s;
- #if PCIBR_FREEZE_TIME
- int ate_total = ate_count;
- unsigned freeze_time;
- #endif
- #if PCIBR_ATE_DEBUG
- bridge_ate_t ate_cmp;
- bridge_ate_p ate_cptr;
- unsigned ate_lo, ate_hi;
- int ate_bad = 0;
- int ate_rbc = 0;
- #endif
- bridge_ate_p ate_ptr = pcibr_dmamap->bd_ate_ptr;
- bridge_ate_t ate;
- /* Bridge Hardware WAR #482836:
- * If the transfer is not cache aligned
- * and the Bridge Rev is <= B, force
- * prefetch to be off.
- */
- if (flags & PCIBR_NOPREFETCH)
- ate_proto &= ~ATE_PREF;
- ate = ate_proto
- | (xio_port << ATE_TIDSHIFT)
- | (xio_addr - offset);
- pci_addr = pcibr_dmamap->bd_pci_addr + offset;
- /* Fill in our mapping registers
- * with the appropriate xtalk data,
- * and hand back the PCI address.
- */
- ASSERT(ate_count > 0);
- if (ate_count <= pcibr_dmamap->bd_ate_count) {
- ATE_FREEZE();
- ATE_WRITE();
- ATE_THAW();
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- } else {
- /* The number of ATE's required is greater than the number
- * allocated for this map. One way this can happen is if
- * pcibr_dmamap_alloc() was called with the PCIBR_NO_ATE_ROUNDUP
- * flag, and then when that map is used (right now), the
- * target address tells us we really did need to roundup.
- * The other possibility is that the map is just plain too
- * small to handle the requested target area.
- */
- #if PCIBR_ATE_DEBUG
- printk(KERN_WARNING "pcibr_dmamap_addr :n"
- "twanted paddr [0x%x..0x%x]n"
- "tate_count 0x%x bd_ate_count 0x%xn"
- "tATE's required > number allocatedn",
- paddr, paddr + req_size - 1,
- ate_count, pcibr_dmamap->bd_ate_count);
- #endif
- pci_addr = 0;
- }
- }
- return pci_addr;
- }
- /*ARGSUSED */
- alenlist_t
- pcibr_dmamap_list(pcibr_dmamap_t pcibr_dmamap,
- alenlist_t palenlist,
- unsigned flags)
- {
- pcibr_soft_t pcibr_soft;
- bridge_t *bridge=NULL;
- unsigned al_flags = (flags & PCIIO_NOSLEEP) ? AL_NOSLEEP : 0;
- int inplace = flags & PCIIO_INPLACE;
- alenlist_t pciio_alenlist = 0;
- alenlist_t xtalk_alenlist;
- size_t length;
- iopaddr_t offset;
- unsigned direct64;
- int ate_index = 0;
- int ate_count = 0;
- int ate_total = 0;
- bridge_ate_p ate_ptr = (bridge_ate_p)0;
- bridge_ate_t ate_proto = (bridge_ate_t)0;
- bridge_ate_t ate_prev;
- bridge_ate_t ate;
- alenaddr_t xio_addr;
- xwidgetnum_t xio_port;
- iopaddr_t pci_addr;
- alenaddr_t new_addr;
- unsigned cmd_regs[8];
- unsigned s = 0;
- #if PCIBR_FREEZE_TIME
- unsigned freeze_time;
- #endif
- int ate_freeze_done = 0; /* To pair ATE_THAW
- * with an ATE_FREEZE
- */
- pcibr_soft = pcibr_dmamap->bd_soft;
- xtalk_alenlist = xtalk_dmamap_list(pcibr_dmamap->bd_xtalk, palenlist,
- flags & DMAMAP_FLAGS);
- if (!xtalk_alenlist)
- goto fail;
- alenlist_cursor_init(xtalk_alenlist, 0, NULL);
- if (inplace) {
- pciio_alenlist = xtalk_alenlist;
- } else {
- pciio_alenlist = alenlist_create(al_flags);
- if (!pciio_alenlist)
- goto fail;
- }
- direct64 = pcibr_dmamap->bd_flags & PCIIO_DMA_A64;
- if (!direct64) {
- bridge = pcibr_soft->bs_base;
- ate_ptr = pcibr_dmamap->bd_ate_ptr;
- ate_index = pcibr_dmamap->bd_ate_index;
- ate_proto = pcibr_dmamap->bd_ate_proto;
- ATE_FREEZE();
- ate_freeze_done = 1; /* Remember that we need to do an ATE_THAW */
- }
- pci_addr = pcibr_dmamap->bd_pci_addr;
- ate_prev = 0; /* matches no valid ATEs */
- while (ALENLIST_SUCCESS ==
- alenlist_get(xtalk_alenlist, NULL, 0,
- &xio_addr, &length, al_flags)) {
- if (XIO_PACKED(xio_addr)) {
- xio_port = XIO_PORT(xio_addr);
- xio_addr = XIO_ADDR(xio_addr);
- } else
- xio_port = pcibr_dmamap->bd_xio_port;
- if (xio_port == pcibr_soft->bs_xid) {
- new_addr = pcibr_addr_xio_to_pci(pcibr_soft, xio_addr, length);
- if (new_addr == PCI_NOWHERE)
- goto fail;
- } else if (direct64) {
- new_addr = pci_addr | xio_addr
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
- /* Bridge Hardware WAR #482836:
- * If the transfer is not cache aligned
- * and the Bridge Rev is <= B, force
- * prefetch to be off.
- */
- if (flags & PCIBR_NOPREFETCH)
- new_addr &= ~PCI64_ATTR_PREF;
- } else {
- /* calculate the ate value for
- * the first address. If it
- * matches the previous
- * ATE written (ie. we had
- * multiple blocks in the
- * same IOPG), then back up
- * and reuse that ATE.
- *
- * We are NOT going to
- * aggressively try to
- * reuse any other ATEs.
- */
- offset = IOPGOFF(xio_addr);
- ate = ate_proto
- | (xio_port << ATE_TIDSHIFT)
- | (xio_addr - offset);
- if (ate == ate_prev) {
- #if PCIBR_ATE_DEBUG
- printk("pcibr_dmamap_list: ATE sharen");
- #endif
- ate_ptr--;
- ate_index--;
- pci_addr -= IOPGSIZE;
- }
- new_addr = pci_addr + offset;
- /* Fill in the hardware ATEs
- * that contain this block.
- */
- ate_count = IOPG(offset + length - 1) + 1;
- ate_total += ate_count;
- /* Ensure that this map contains enough ATE's */
- if (ate_total > pcibr_dmamap->bd_ate_count) {
- #if PCIBR_ATE_DEBUG
- printk(KERN_WARNING "pcibr_dmamap_list :n"
- "twanted xio_addr [0x%x..0x%x]n"
- "tate_total 0x%x bd_ate_count 0x%xn"
- "tATE's required > number allocatedn",
- xio_addr, xio_addr + length - 1,
- ate_total, pcibr_dmamap->bd_ate_count);
- #endif
- goto fail;
- }
- ATE_WRITE();
- ate_index += ate_count;
- ate_ptr += ate_count;
- ate_count <<= IOPFNSHIFT;
- ate += ate_count;
- pci_addr += ate_count;
- }
- /* write the PCI DMA address
- * out to the scatter-gather list.
- */
- if (inplace) {
- if (ALENLIST_SUCCESS !=
- alenlist_replace(pciio_alenlist, NULL,
- &new_addr, &length, al_flags))
- goto fail;
- } else {
- if (ALENLIST_SUCCESS !=
- alenlist_append(pciio_alenlist,
- new_addr, length, al_flags))
- goto fail;
- }
- }
- if (!inplace)
- alenlist_done(xtalk_alenlist);
- /* Reset the internal cursor of the alenlist to be returned back
- * to the caller.
- */
- alenlist_cursor_init(pciio_alenlist, 0, NULL);
- /* In case an ATE_FREEZE was done do the ATE_THAW to unroll all the
- * changes that ATE_FREEZE has done to implement the external SSRAM
- * bug workaround.
- */
- if (ate_freeze_done) {
- ATE_THAW();
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- }
- return pciio_alenlist;
- fail:
- /* There are various points of failure after doing an ATE_FREEZE
- * We need to do an ATE_THAW. Otherwise the ATEs are locked forever.
- * The decision to do an ATE_THAW needs to be based on whether a
- * an ATE_FREEZE was done before.
- */
- if (ate_freeze_done) {
- ATE_THAW();
- bridge->b_wid_tflush;
- }
- if (pciio_alenlist && !inplace)
- alenlist_destroy(pciio_alenlist);
- return 0;
- }
- /*ARGSUSED */
- void
- pcibr_dmamap_done(pcibr_dmamap_t pcibr_dmamap)
- {
- /*
- * We could go through and invalidate ATEs here;
- * for performance reasons, we don't.
- * We also don't enforce the strict alternation
- * between _addr/_list and _done, but Hub does.
- */
- if (pcibr_dmamap->bd_flags & PCIBR_DMAMAP_BUSY) {
- pcibr_dmamap->bd_flags &= ~PCIBR_DMAMAP_BUSY;
- if (pcibr_dmamap->bd_flags & PCIBR_DMAMAP_SSRAM)
- atomic_dec(&(pcibr_dmamap->bd_soft->bs_slot[pcibr_dmamap->bd_slot]. bss_ext_ates_active));
- }
- xtalk_dmamap_done(pcibr_dmamap->bd_xtalk);
- }
- /*
- * For each bridge, the DIR_OFF value in the Direct Mapping Register
- * determines the PCI to Crosstalk memory mapping to be used for all
- * 32-bit Direct Mapping memory accesses. This mapping can be to any
- * node in the system. This function will return that compact node id.
- */
- /*ARGSUSED */
- cnodeid_t
- pcibr_get_dmatrans_node(devfs_handle_t pconn_vhdl)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- return(NASID_TO_COMPACT_NODEID(NASID_GET(pcibr_soft->bs_dir_xbase)));
- }
- /*ARGSUSED */
- iopaddr_t
- pcibr_dmatrans_addr(devfs_handle_t pconn_vhdl,
- device_desc_t dev_desc,
- paddr_t paddr,
- size_t req_size,
- unsigned flags)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_slot_t slotp = &pcibr_soft->bs_slot[pciio_slot];
- xwidgetnum_t xio_port;
- iopaddr_t xio_addr;
- iopaddr_t pci_addr;
- int have_rrbs;
- int min_rrbs;
- /* merge in forced flags */
- flags |= pcibr_soft->bs_dma_flags;
- xio_addr = xtalk_dmatrans_addr(xconn_vhdl, 0, paddr, req_size,
- flags & DMAMAP_FLAGS);
- if (!xio_addr) {
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- return 0;
- }
- /*
- * find which XIO port this goes to.
- */
- if (XIO_PACKED(xio_addr)) {
- if (xio_addr == XIO_NOWHERE) {
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- return 0;
- }
- xio_port = XIO_PORT(xio_addr);
- xio_addr = XIO_ADDR(xio_addr);
- } else
- xio_port = pcibr_soft->bs_mxid;
- /*
- * If this DMA comes back to us,
- * return the PCI MEM address on
- * which it would land, or NULL
- * if the target is something
- * on bridge other than PCI MEM.
- */
- if (xio_port == pcibr_soft->bs_xid) {
- pci_addr = pcibr_addr_xio_to_pci(pcibr_soft, xio_addr, req_size);
- return pci_addr;
- }
- /* If the caller can use A64, try to
- * satisfy the request with the 64-bit
- * direct map. This can fail if the
- * configuration bits in Device(x)
- * conflict with our flags.
- */
- if (flags & PCIIO_DMA_A64) {
- pci_addr = slotp->bss_d64_base;
- if (!(flags & PCIBR_VCHAN1))
- flags |= PCIBR_VCHAN0;
- if ((pci_addr != PCIBR_D64_BASE_UNSET) &&
- (flags == slotp->bss_d64_flags)) {
- #ifdef CONFIG_IA64_SGI_SN2
- pci_addr |= (PHYS_TO_DMA(xio_addr))
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
- #else
- pci_addr |= xio_addr
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
- #endif
- #if DEBUG && PCIBR_DMA_DEBUG
- #if HWG_PERF_CHECK
- if (xio_addr != 0x20000000)
- #endif
- printk("pcibr_dmatrans_addr: [reuse]n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tdirect 64bit address is 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr, pci_addr);
- #endif
- return (pci_addr);
- }
- if (!pcibr_try_set_device(pcibr_soft, pciio_slot, flags, BRIDGE_DEV_D64_BITS)) {
- pci_addr = pcibr_flags_to_d64(flags, pcibr_soft);
- slotp->bss_d64_flags = flags;
- slotp->bss_d64_base = pci_addr;
- #ifdef CONFIG_IA64_SGI_SN2
- pci_addr |= (PHYS_TO_DMA(xio_addr))
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
- #else
- pci_addr |= xio_addr
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
- #endif
- /* Make sure we have an RRB (or two).
- */
- if (!(pcibr_soft->bs_rrb_fixed & (1 << pciio_slot))) {
- if (flags & PCIBR_VCHAN1)
- pciio_slot += PCIBR_RRB_SLOT_VIRTUAL;
- have_rrbs = pcibr_soft->bs_rrb_valid[pciio_slot];
- if (have_rrbs < 2) {
- if (pci_addr & PCI64_ATTR_PREF)
- min_rrbs = 2;
- else
- min_rrbs = 1;
- if (have_rrbs < min_rrbs)
- do_pcibr_rrb_autoalloc(pcibr_soft, pciio_slot, min_rrbs - have_rrbs);
- }
- }
- #if PCIBR_DMA_DEBUG
- #if HWG_PERF_CHECK
- if (xio_addr != 0x20000000)
- #endif
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tdirect 64bit address is 0x%xn"
- "tnew flags: 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr, pci_addr, (uint64_t) flags);
- #endif
- return (pci_addr);
- }
- /* our flags conflict with Device(x).
- */
- flags = flags
- & ~PCIIO_DMA_A64
- & ~PCIBR_VCHAN0
- ;
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tUnable to set Device(x) bits for Direct-64n",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- }
- /* Try to satisfy the request with the 32-bit direct
- * map. This can fail if the configuration bits in
- * Device(x) conflict with our flags, or if the
- * target address is outside where DIR_OFF points.
- */
- {
- size_t map_size = 1ULL << 31;
- iopaddr_t xio_base = pcibr_soft->bs_dir_xbase;
- iopaddr_t offset = xio_addr - xio_base;
- iopaddr_t endoff = req_size + offset;
- if ((req_size > map_size) ||
- (xio_addr < xio_base) ||
- (xio_port != pcibr_soft->bs_dir_xport) ||
- (endoff > map_size)) {
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "txio region outside direct32 targetn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- } else {
- pci_addr = slotp->bss_d32_base;
- if ((pci_addr != PCIBR_D32_BASE_UNSET) &&
- (flags == slotp->bss_d32_flags)) {
- pci_addr |= offset;
- #if DEBUG && PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr: [reuse]n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tmapped via direct32 offset 0x%xn"
- "twill DMA via pci addr 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr, offset, pci_addr);
- #endif
- return (pci_addr);
- }
- if (!pcibr_try_set_device(pcibr_soft, pciio_slot, flags, BRIDGE_DEV_D32_BITS)) {
- pci_addr = PCI32_DIRECT_BASE;
- slotp->bss_d32_flags = flags;
- slotp->bss_d32_base = pci_addr;
- pci_addr |= offset;
- /* Make sure we have an RRB (or two).
- */
- if (!(pcibr_soft->bs_rrb_fixed & (1 << pciio_slot))) {
- have_rrbs = pcibr_soft->bs_rrb_valid[pciio_slot];
- if (have_rrbs < 2) {
- if (slotp->bss_device & BRIDGE_DEV_PREF)
- min_rrbs = 2;
- else
- min_rrbs = 1;
- if (have_rrbs < min_rrbs)
- do_pcibr_rrb_autoalloc(pcibr_soft, pciio_slot, min_rrbs - have_rrbs);
- }
- }
- #if PCIBR_DMA_DEBUG
- #if HWG_PERF_CHECK
- if (xio_addr != 0x20000000)
- #endif
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tmapped via direct32 offset 0x%xn"
- "twill DMA via pci addr 0x%xn"
- "tnew flags: 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr, offset, pci_addr, (uint64_t) flags);
- #endif
- return (pci_addr);
- }
- /* our flags conflict with Device(x).
- */
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tUnable to set Device(x) bits for Direct-32n",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- }
- }
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn"
- "tno acceptable PCI address found or constructablen",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- return 0;
- }
- /*ARGSUSED */
- alenlist_t
- pcibr_dmatrans_list(devfs_handle_t pconn_vhdl,
- device_desc_t dev_desc,
- alenlist_t palenlist,
- unsigned flags)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_slot_t slotp = &pcibr_soft->bs_slot[pciio_slot];
- xwidgetnum_t xio_port;
- alenlist_t pciio_alenlist = 0;
- alenlist_t xtalk_alenlist = 0;
- int inplace;
- unsigned direct64;
- unsigned al_flags;
- iopaddr_t xio_base;
- alenaddr_t xio_addr;
- size_t xio_size;
- size_t map_size;
- iopaddr_t pci_base;
- alenaddr_t pci_addr;
- unsigned relbits = 0;
- /* merge in forced flags */
- flags |= pcibr_soft->bs_dma_flags;
- inplace = flags & PCIIO_INPLACE;
- direct64 = flags & PCIIO_DMA_A64;
- al_flags = (flags & PCIIO_NOSLEEP) ? AL_NOSLEEP : 0;
- if (direct64) {
- map_size = 1ull << 48;
- xio_base = 0;
- pci_base = slotp->bss_d64_base;
- if ((pci_base != PCIBR_D64_BASE_UNSET) &&
- (flags == slotp->bss_d64_flags)) {
- /* reuse previous base info */
- } else if (pcibr_try_set_device(pcibr_soft, pciio_slot, flags, BRIDGE_DEV_D64_BITS) < 0) {
- /* DMA configuration conflict */
- goto fail;
- } else {
- relbits = BRIDGE_DEV_D64_BITS;
- pci_base =
- pcibr_flags_to_d64(flags, pcibr_soft);
- }
- } else {
- xio_base = pcibr_soft->bs_dir_xbase;
- map_size = 1ull << 31;
- pci_base = slotp->bss_d32_base;
- if ((pci_base != PCIBR_D32_BASE_UNSET) &&
- (flags == slotp->bss_d32_flags)) {
- /* reuse previous base info */
- } else if (pcibr_try_set_device(pcibr_soft, pciio_slot, flags, BRIDGE_DEV_D32_BITS) < 0) {
- /* DMA configuration conflict */
- goto fail;
- } else {
- relbits = BRIDGE_DEV_D32_BITS;
- pci_base = PCI32_DIRECT_BASE;
- }
- }
- xtalk_alenlist = xtalk_dmatrans_list(xconn_vhdl, 0, palenlist,
- flags & DMAMAP_FLAGS);
- if (!xtalk_alenlist)
- goto fail;
- alenlist_cursor_init(xtalk_alenlist, 0, NULL);
- if (inplace) {
- pciio_alenlist = xtalk_alenlist;
- } else {
- pciio_alenlist = alenlist_create(al_flags);
- if (!pciio_alenlist)
- goto fail;
- }
- while (ALENLIST_SUCCESS ==
- alenlist_get(xtalk_alenlist, NULL, 0,
- &xio_addr, &xio_size, al_flags)) {
- /*
- * find which XIO port this goes to.
- */
- if (XIO_PACKED(xio_addr)) {
- if (xio_addr == XIO_NOWHERE) {
- #if PCIBR_DMA_DEBUG
- printk("pcibr_dmatrans_addr:n"
- "tpciio connection point %vn"
- "txtalk connection point %vn"
- "twanted paddr [0x%x..0x%x]n"
- "txtalk_dmatrans_addr returned 0x%xn",
- pconn_vhdl, xconn_vhdl,
- paddr, paddr + req_size - 1,
- xio_addr);
- #endif
- return 0;
- }
- xio_port = XIO_PORT(xio_addr);
- xio_addr = XIO_ADDR(xio_addr);
- } else
- xio_port = pcibr_soft->bs_mxid;
- /*
- * If this DMA comes back to us,
- * return the PCI MEM address on
- * which it would land, or NULL
- * if the target is something
- * on bridge other than PCI MEM.
- */
- if (xio_port == pcibr_soft->bs_xid) {
- pci_addr = pcibr_addr_xio_to_pci(pcibr_soft, xio_addr, xio_size);
- if ( (pci_addr == (alenaddr_t)NULL) )
- goto fail;
- } else if (direct64) {
- ASSERT(xio_port != 0);
- pci_addr = pci_base | xio_addr
- | ((uint64_t) xio_port << PCI64_ATTR_TARG_SHFT);
- } else {
- iopaddr_t offset = xio_addr - xio_base;
- iopaddr_t endoff = xio_size + offset;
- if ((xio_size > map_size) ||
- (xio_addr < xio_base) ||
- (xio_port != pcibr_soft->bs_dir_xport) ||
- (endoff > map_size))
- goto fail;
- pci_addr = pci_base + (xio_addr - xio_base);
- }
- /* write the PCI DMA address
- * out to the scatter-gather list.
- */
- if (inplace) {
- if (ALENLIST_SUCCESS !=
- alenlist_replace(pciio_alenlist, NULL,
- &pci_addr, &xio_size, al_flags))
- goto fail;
- } else {
- if (ALENLIST_SUCCESS !=
- alenlist_append(pciio_alenlist,
- pci_addr, xio_size, al_flags))
- goto fail;
- }
- }
- if (relbits) {
- if (direct64) {
- slotp->bss_d64_flags = flags;
- slotp->bss_d64_base = pci_base;
- } else {
- slotp->bss_d32_flags = flags;
- slotp->bss_d32_base = pci_base;
- }
- }
- if (!inplace)
- alenlist_done(xtalk_alenlist);
- /* Reset the internal cursor of the alenlist to be returned back
- * to the caller.
- */
- alenlist_cursor_init(pciio_alenlist, 0, NULL);
- return pciio_alenlist;
- fail:
- if (relbits)
- pcibr_release_device(pcibr_soft, pciio_slot, relbits);
- if (pciio_alenlist && !inplace)
- alenlist_destroy(pciio_alenlist);
- return 0;
- }
- void
- pcibr_dmamap_drain(pcibr_dmamap_t map)
- {
- xtalk_dmamap_drain(map->bd_xtalk);
- }
- void
- pcibr_dmaaddr_drain(devfs_handle_t pconn_vhdl,
- paddr_t paddr,
- size_t bytes)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- xtalk_dmaaddr_drain(xconn_vhdl, paddr, bytes);
- }
- void
- pcibr_dmalist_drain(devfs_handle_t pconn_vhdl,
- alenlist_t list)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- devfs_handle_t xconn_vhdl = pcibr_soft->bs_conn;
- xtalk_dmalist_drain(xconn_vhdl, list);
- }
- /*
- * Get the starting PCIbus address out of the given DMA map.
- * This function is supposed to be used by a close friend of PCI bridge
- * since it relies on the fact that the starting address of the map is fixed at
- * the allocation time in the current implementation of PCI bridge.
- */
- iopaddr_t
- pcibr_dmamap_pciaddr_get(pcibr_dmamap_t pcibr_dmamap)
- {
- return (pcibr_dmamap->bd_pci_addr);
- }
- /* =====================================================================
- * CONFIGURATION MANAGEMENT
- */
- /*ARGSUSED */
- void
- pcibr_provider_startup(devfs_handle_t pcibr)
- {
- }
- /*ARGSUSED */
- void
- pcibr_provider_shutdown(devfs_handle_t pcibr)
- {
- }
- int
- pcibr_reset(devfs_handle_t conn)
- {
- pciio_info_t pciio_info = pciio_info_get(conn);
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- bridge_t *bridge = pcibr_soft->bs_base;
- bridgereg_t ctlreg;
- unsigned cfgctl[8];
- unsigned long s;
- int f, nf;
- pcibr_info_h pcibr_infoh;
- pcibr_info_t pcibr_info;
- int win;
- if (pcibr_soft->bs_slot[pciio_slot].has_host) {
- pciio_slot = pcibr_soft->bs_slot[pciio_slot].host_slot;
- pcibr_info = pcibr_soft->bs_slot[pciio_slot].bss_infos[0];
- }
- if (pciio_slot < 4) {
- s = pcibr_lock(pcibr_soft);
- nf = pcibr_soft->bs_slot[pciio_slot].bss_ninfo;
- pcibr_infoh = pcibr_soft->bs_slot[pciio_slot].bss_infos;
- for (f = 0; f < nf; ++f)
- if (pcibr_infoh[f])
- cfgctl[f] = bridge->b_type0_cfg_dev[pciio_slot].f[f].l[PCI_CFG_COMMAND / 4];
- ctlreg = bridge->b_wid_control;
- bridge->b_wid_control = ctlreg | BRIDGE_CTRL_RST(pciio_slot);
- /* XXX delay? */
- bridge->b_wid_control = ctlreg;
- /* XXX delay? */
- for (f = 0; f < nf; ++f)
- if ((pcibr_info = pcibr_infoh[f]))
- for (win = 0; win < 6; ++win)
- if (pcibr_info->f_window[win].w_base != 0)
- bridge->b_type0_cfg_dev[pciio_slot].f[f].l[PCI_CFG_BASE_ADDR(win) / 4] =
- pcibr_info->f_window[win].w_base;
- for (f = 0; f < nf; ++f)
- if (pcibr_infoh[f])
- bridge->b_type0_cfg_dev[pciio_slot].f[f].l[PCI_CFG_COMMAND / 4] = cfgctl[f];
- pcibr_unlock(pcibr_soft, s);
- return 0;
- }
- #ifdef SUPPORT_PRINTING_V_FORMAT
- printk(KERN_WARNING "%v: pcibr_reset unimplemented for slot %dn",
- conn, pciio_slot);
- #endif
- return -1;
- }
- pciio_endian_t
- pcibr_endian_set(devfs_handle_t pconn_vhdl,
- pciio_endian_t device_end,
- pciio_endian_t desired_end)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- bridgereg_t devreg;
- unsigned long s;
- /*
- * Bridge supports hardware swapping; so we can always
- * arrange for the caller's desired endianness.
- */
- s = pcibr_lock(pcibr_soft);
- devreg = pcibr_soft->bs_slot[pciio_slot].bss_device;
- if (device_end != desired_end)
- devreg |= BRIDGE_DEV_SWAP_BITS;
- else
- devreg &= ~BRIDGE_DEV_SWAP_BITS;
- /* NOTE- if we ever put SWAP bits
- * onto the disabled list, we will
- * have to change the logic here.
- */
- if (pcibr_soft->bs_slot[pciio_slot].bss_device != devreg) {
- bridge_t *bridge = pcibr_soft->bs_base;
- bridge->b_device[pciio_slot].reg = devreg;
- pcibr_soft->bs_slot[pciio_slot].bss_device = devreg;
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- }
- pcibr_unlock(pcibr_soft, s);
- #if DEBUG && PCIBR_DEV_DEBUG
- printk("pcibr Device(%d): 0x%pn", pciio_slot, bridge->b_device[pciio_slot].reg);
- #endif
- return desired_end;
- }
- /* This (re)sets the GBR and REALTIME bits and also keeps track of how
- * many sets are outstanding. Reset succeeds only if the number of outstanding
- * sets == 1.
- */
- int
- pcibr_priority_bits_set(pcibr_soft_t pcibr_soft,
- pciio_slot_t pciio_slot,
- pciio_priority_t device_prio)
- {
- unsigned long s;
- int *counter;
- bridgereg_t rtbits = 0;
- bridgereg_t devreg;
- int rc = PRIO_SUCCESS;
- /* in dual-slot configurations, the host and the
- * guest have separate DMA resources, so they
- * have separate requirements for priority bits.
- */
- counter = &(pcibr_soft->bs_slot[pciio_slot].bss_pri_uctr);
- /*
- * Bridge supports PCI notions of LOW and HIGH priority
- * arbitration rings via a "REAL_TIME" bit in the per-device
- * Bridge register. The "GBR" bit controls access to the GBR
- * ring on the xbow. These two bits are (re)set together.
- *
- * XXX- Bug in Rev B Bridge Si:
- * Symptom: Prefetcher starts operating incorrectly. This happens
- * due to corruption of the address storage ram in the prefetcher
- * when a non-real time PCI request is pulled and a real-time one is
- * put in it's place. Workaround: Use only a single arbitration ring
- * on PCI bus. GBR and RR can still be uniquely used per
- * device. NETLIST MERGE DONE, WILL BE FIXED IN REV C.
- */
- if (pcibr_soft->bs_rev_num != BRIDGE_PART_REV_B)
- rtbits |= BRIDGE_DEV_RT;
- /* NOTE- if we ever put DEV_RT or DEV_GBR on
- * the disabled list, we will have to take
- * it into account here.
- */
- s = pcibr_lock(pcibr_soft);
- devreg = pcibr_soft->bs_slot[pciio_slot].bss_device;
- if (device_prio == PCI_PRIO_HIGH) {
- if ((++*counter == 1)) {
- if (rtbits)
- devreg |= rtbits;
- else
- rc = PRIO_FAIL;
- }
- } else if (device_prio == PCI_PRIO_LOW) {
- if (*counter <= 0)
- rc = PRIO_FAIL;
- else if (--*counter == 0)
- if (rtbits)
- devreg &= ~rtbits;
- }
- if (pcibr_soft->bs_slot[pciio_slot].bss_device != devreg) {
- bridge_t *bridge = pcibr_soft->bs_base;
- bridge->b_device[pciio_slot].reg = devreg;
- pcibr_soft->bs_slot[pciio_slot].bss_device = devreg;
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- }
- pcibr_unlock(pcibr_soft, s);
- return rc;
- }
- pciio_priority_t
- pcibr_priority_set(devfs_handle_t pconn_vhdl,
- pciio_priority_t device_prio)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- (void) pcibr_priority_bits_set(pcibr_soft, pciio_slot, device_prio);
- return device_prio;
- }
- /*
- * Interfaces to allow special (e.g. SGI) drivers to set/clear
- * Bridge-specific device flags. Many flags are modified through
- * PCI-generic interfaces; we don't allow them to be directly
- * manipulated here. Only flags that at this point seem pretty
- * Bridge-specific can be set through these special interfaces.
- * We may add more flags as the need arises, or remove flags and
- * create PCI-generic interfaces as the need arises.
- *
- * Returns 0 on failure, 1 on success
- */
- int
- pcibr_device_flags_set(devfs_handle_t pconn_vhdl,
- pcibr_device_flags_t flags)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pciio_slot_t pciio_slot = pciio_info_slot_get(pciio_info);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
- bridgereg_t set = 0;
- bridgereg_t clr = 0;
- ASSERT((flags & PCIBR_DEVICE_FLAGS) == flags);
- if (flags & PCIBR_WRITE_GATHER)
- set |= BRIDGE_DEV_PMU_WRGA_EN;
- if (flags & PCIBR_NOWRITE_GATHER)
- clr |= BRIDGE_DEV_PMU_WRGA_EN;
- if (flags & PCIBR_WRITE_GATHER)
- set |= BRIDGE_DEV_DIR_WRGA_EN;
- if (flags & PCIBR_NOWRITE_GATHER)
- clr |= BRIDGE_DEV_DIR_WRGA_EN;
- if (flags & PCIBR_PREFETCH)
- set |= BRIDGE_DEV_PREF;
- if (flags & PCIBR_NOPREFETCH)
- clr |= BRIDGE_DEV_PREF;
- if (flags & PCIBR_PRECISE)
- set |= BRIDGE_DEV_PRECISE;
- if (flags & PCIBR_NOPRECISE)
- clr |= BRIDGE_DEV_PRECISE;
- if (flags & PCIBR_BARRIER)
- set |= BRIDGE_DEV_BARRIER;
- if (flags & PCIBR_NOBARRIER)
- clr |= BRIDGE_DEV_BARRIER;
- if (flags & PCIBR_64BIT)
- set |= BRIDGE_DEV_DEV_SIZE;
- if (flags & PCIBR_NO64BIT)
- clr |= BRIDGE_DEV_DEV_SIZE;
- if (set || clr) {
- bridgereg_t devreg;
- unsigned long s;
- s = pcibr_lock(pcibr_soft);
- devreg = pcibr_soft->bs_slot[pciio_slot].bss_device;
- devreg = (devreg & ~clr) | set;
- if (pcibr_soft->bs_slot[pciio_slot].bss_device != devreg) {
- bridge_t *bridge = pcibr_soft->bs_base;
- bridge->b_device[pciio_slot].reg = devreg;
- pcibr_soft->bs_slot[pciio_slot].bss_device = devreg;
- bridge->b_wid_tflush; /* wait until Bridge PIO complete */
- }
- pcibr_unlock(pcibr_soft, s);
- #if DEBUG && PCIBR_DEV_DEBUG
- printk("pcibr Device(%d): %Rn", pciio_slot, bridge->b_device[pciio_slot].regbridge->b_device[pciio_slot].reg, device_bits);
- #endif
- }
- return (1);
- }
- pciio_provider_t pcibr_provider =
- {
- (pciio_piomap_alloc_f *) pcibr_piomap_alloc,
- (pciio_piomap_free_f *) pcibr_piomap_free,
- (pciio_piomap_addr_f *) pcibr_piomap_addr,
- (pciio_piomap_done_f *) pcibr_piomap_done,
- (pciio_piotrans_addr_f *) pcibr_piotrans_addr,
- (pciio_piospace_alloc_f *) pcibr_piospace_alloc,
- (pciio_piospace_free_f *) pcibr_piospace_free,
- (pciio_dmamap_alloc_f *) pcibr_dmamap_alloc,
- (pciio_dmamap_free_f *) pcibr_dmamap_free,
- (pciio_dmamap_addr_f *) pcibr_dmamap_addr,
- (pciio_dmamap_list_f *) pcibr_dmamap_list,
- (pciio_dmamap_done_f *) pcibr_dmamap_done,
- (pciio_dmatrans_addr_f *) pcibr_dmatrans_addr,
- (pciio_dmatrans_list_f *) pcibr_dmatrans_list,
- (pciio_dmamap_drain_f *) pcibr_dmamap_drain,
- (pciio_dmaaddr_drain_f *) pcibr_dmaaddr_drain,
- (pciio_dmalist_drain_f *) pcibr_dmalist_drain,
- (pciio_intr_alloc_f *) pcibr_intr_alloc,
- (pciio_intr_free_f *) pcibr_intr_free,
- (pciio_intr_connect_f *) pcibr_intr_connect,
- (pciio_intr_disconnect_f *) pcibr_intr_disconnect,
- (pciio_intr_cpu_get_f *) pcibr_intr_cpu_get,
- (pciio_provider_startup_f *) pcibr_provider_startup,
- (pciio_provider_shutdown_f *) pcibr_provider_shutdown,
- (pciio_reset_f *) pcibr_reset,
- (pciio_write_gather_flush_f *) pcibr_write_gather_flush,
- (pciio_endian_set_f *) pcibr_endian_set,
- (pciio_priority_set_f *) pcibr_priority_set,
- (pciio_config_get_f *) pcibr_config_get,
- (pciio_config_set_f *) pcibr_config_set,
- (pciio_error_devenable_f *) 0,
- (pciio_error_extract_f *) 0,
- #ifdef LATER
- (pciio_driver_reg_callback_f *) pcibr_driver_reg_callback,
- (pciio_driver_unreg_callback_f *) pcibr_driver_unreg_callback,
- #else
- (pciio_driver_reg_callback_f *) 0,
- (pciio_driver_unreg_callback_f *) 0,
- #endif
- (pciio_device_unregister_f *) pcibr_device_unregister,
- (pciio_dma_enabled_f *) pcibr_dma_enabled,
- };
- int
- pcibr_dma_enabled(devfs_handle_t pconn_vhdl)
- {
- pciio_info_t pciio_info = pciio_info_get(pconn_vhdl);
- pcibr_soft_t pcibr_soft = (pcibr_soft_t) pciio_info_mfast_get(pciio_info);
-
- return xtalk_dma_enabled(pcibr_soft->bs_conn);
- }