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pci_machdep_common.c revision 1.1.2.2
      1  1.1.2.2  garbled /* $NetBSD: pci_machdep_common.c,v 1.1.2.2 2007/05/01 17:46:57 garbled Exp $ */
      2  1.1.2.1  garbled 
      3  1.1.2.1  garbled /*-
      4  1.1.2.1  garbled  * Copyright (c) 2007 The NetBSD Foundation, Inc.
      5  1.1.2.1  garbled  * All rights reserved.
      6  1.1.2.1  garbled  *
      7  1.1.2.1  garbled  * This code is derived from software contributed to The NetBSD Foundation
      8  1.1.2.1  garbled  * by Tim Rightnour
      9  1.1.2.1  garbled  *
     10  1.1.2.1  garbled  * Redistribution and use in source and binary forms, with or without
     11  1.1.2.1  garbled  * modification, are permitted provided that the following conditions
     12  1.1.2.1  garbled  * are met:
     13  1.1.2.1  garbled  * 1. Redistributions of source code must retain the above copyright
     14  1.1.2.1  garbled  *    notice, this list of conditions and the following disclaimer.
     15  1.1.2.1  garbled  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1.2.1  garbled  *    notice, this list of conditions and the following disclaimer in the
     17  1.1.2.1  garbled  *    documentation and/or other materials provided with the distribution.
     18  1.1.2.1  garbled  * 3. All advertising materials mentioning features or use of this software
     19  1.1.2.1  garbled  *    must display the following acknowledgement:
     20  1.1.2.1  garbled  *        This product includes software developed by the NetBSD
     21  1.1.2.1  garbled  *        Foundation, Inc. and its contributors.
     22  1.1.2.1  garbled  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  1.1.2.1  garbled  *    contributors may be used to endorse or promote products derived
     24  1.1.2.1  garbled  *    from this software without specific prior written permission.
     25  1.1.2.1  garbled  *
     26  1.1.2.1  garbled  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  1.1.2.1  garbled  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  1.1.2.1  garbled  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  1.1.2.1  garbled  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  1.1.2.1  garbled  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  1.1.2.1  garbled  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  1.1.2.1  garbled  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  1.1.2.1  garbled  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  1.1.2.1  garbled  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  1.1.2.1  garbled  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  1.1.2.1  garbled  * POSSIBILITY OF SUCH DAMAGE.
     37  1.1.2.1  garbled  */
     38  1.1.2.1  garbled 
     39  1.1.2.1  garbled /*
     40  1.1.2.1  garbled  * Generic PowerPC functions for dealing with a PCI bridge.  For most cases,
     41  1.1.2.1  garbled  * these functions will work just fine, however, some machines may need
     42  1.1.2.1  garbled  * specialized code, so those ports are free to write thier own functions
     43  1.1.2.1  garbled  * and call those instead where appropriate.
     44  1.1.2.1  garbled  */
     45  1.1.2.1  garbled 
     46  1.1.2.1  garbled #include <sys/cdefs.h>
     47  1.1.2.2  garbled __KERNEL_RCSID(0, "$NetBSD: pci_machdep_common.c,v 1.1.2.2 2007/05/01 17:46:57 garbled Exp $");
     48  1.1.2.1  garbled 
     49  1.1.2.1  garbled #include <sys/types.h>
     50  1.1.2.1  garbled #include <sys/param.h>
     51  1.1.2.1  garbled #include <sys/time.h>
     52  1.1.2.1  garbled #include <sys/systm.h>
     53  1.1.2.1  garbled #include <sys/errno.h>
     54  1.1.2.1  garbled #include <sys/extent.h>
     55  1.1.2.1  garbled #include <sys/device.h>
     56  1.1.2.1  garbled #include <sys/malloc.h>
     57  1.1.2.1  garbled 
     58  1.1.2.1  garbled #include <uvm/uvm_extern.h>
     59  1.1.2.1  garbled 
     60  1.1.2.1  garbled #define _POWERPC_BUS_DMA_PRIVATE
     61  1.1.2.1  garbled #include <machine/bus.h>
     62  1.1.2.1  garbled #include <machine/intr.h>
     63  1.1.2.1  garbled 
     64  1.1.2.1  garbled #include <dev/pci/pcivar.h>
     65  1.1.2.1  garbled #include <dev/pci/pcireg.h>
     66  1.1.2.1  garbled #include <dev/pci/pcidevs.h>
     67  1.1.2.1  garbled #include <dev/pci/pciconf.h>
     68  1.1.2.1  garbled 
     69  1.1.2.1  garbled /*
     70  1.1.2.1  garbled  * PCI doesn't have any special needs; just use the generic versions
     71  1.1.2.1  garbled  * of these functions.
     72  1.1.2.1  garbled  */
     73  1.1.2.1  garbled struct powerpc_bus_dma_tag pci_bus_dma_tag = {
     74  1.1.2.1  garbled 	0,			/* _bounce_thresh */
     75  1.1.2.1  garbled 	_bus_dmamap_create,
     76  1.1.2.1  garbled 	_bus_dmamap_destroy,
     77  1.1.2.1  garbled 	_bus_dmamap_load,
     78  1.1.2.1  garbled 	_bus_dmamap_load_mbuf,
     79  1.1.2.1  garbled 	_bus_dmamap_load_uio,
     80  1.1.2.1  garbled 	_bus_dmamap_load_raw,
     81  1.1.2.1  garbled 	_bus_dmamap_unload,
     82  1.1.2.1  garbled 	NULL,			/* _dmamap_sync */
     83  1.1.2.1  garbled 	_bus_dmamem_alloc,
     84  1.1.2.1  garbled 	_bus_dmamem_free,
     85  1.1.2.1  garbled 	_bus_dmamem_map,
     86  1.1.2.1  garbled 	_bus_dmamem_unmap,
     87  1.1.2.1  garbled 	_bus_dmamem_mmap,
     88  1.1.2.1  garbled };
     89  1.1.2.1  garbled 
     90  1.1.2.1  garbled int
     91  1.1.2.1  garbled genppc_pci_bus_maxdevs(pci_chipset_tag_t pc, int busno)
     92  1.1.2.1  garbled {
     93  1.1.2.1  garbled 	return 32;
     94  1.1.2.1  garbled }
     95  1.1.2.1  garbled 
     96  1.1.2.1  garbled const char *
     97  1.1.2.1  garbled genppc_pci_intr_string(void *v, pci_intr_handle_t ih)
     98  1.1.2.1  garbled {
     99  1.1.2.1  garbled 	static char irqstr[8];		/* 4 + 2 + NULL + sanity */
    100  1.1.2.1  garbled 
    101  1.1.2.1  garbled 	if (ih == 0 || ih >= ICU_LEN || ih == IRQ_SLAVE)
    102  1.1.2.1  garbled 		panic("pci_intr_string: bogus handle 0x%x", ih);
    103  1.1.2.1  garbled 
    104  1.1.2.1  garbled 	sprintf(irqstr, "irq %d", ih);
    105  1.1.2.1  garbled 	return (irqstr);
    106  1.1.2.1  garbled 
    107  1.1.2.1  garbled }
    108  1.1.2.1  garbled 
    109  1.1.2.1  garbled const struct evcnt *
    110  1.1.2.1  garbled genppc_pci_intr_evcnt(void *v, pci_intr_handle_t ih)
    111  1.1.2.1  garbled {
    112  1.1.2.1  garbled 
    113  1.1.2.1  garbled 	/* XXX for now, no evcnt parent reported */
    114  1.1.2.1  garbled 	return NULL;
    115  1.1.2.1  garbled }
    116  1.1.2.1  garbled 
    117  1.1.2.1  garbled void *
    118  1.1.2.1  garbled genppc_pci_intr_establish(void *v, pci_intr_handle_t ih, int level,
    119  1.1.2.1  garbled     int (*func)(void *), void *arg)
    120  1.1.2.1  garbled {
    121  1.1.2.1  garbled 
    122  1.1.2.1  garbled 	if (ih == 0 || ih >= ICU_LEN || ih == IRQ_SLAVE)
    123  1.1.2.1  garbled 		panic("pci_intr_establish: bogus handle 0x%x", ih);
    124  1.1.2.1  garbled 
    125  1.1.2.1  garbled 	return intr_establish(ih, IST_LEVEL, level, func, arg);
    126  1.1.2.1  garbled }
    127  1.1.2.1  garbled 
    128  1.1.2.1  garbled void
    129  1.1.2.1  garbled genppc_pci_intr_disestablish(void *v, void *cookie)
    130  1.1.2.1  garbled {
    131  1.1.2.1  garbled 
    132  1.1.2.1  garbled 	intr_disestablish(cookie);
    133  1.1.2.1  garbled }
    134  1.1.2.1  garbled 
    135  1.1.2.1  garbled void
    136  1.1.2.1  garbled genppc_pci_conf_interrupt(void *v, int bus, int dev, int pin,
    137  1.1.2.1  garbled     int swiz, int *iline)
    138  1.1.2.1  garbled {
    139  1.1.2.1  garbled 	/* do nothing */
    140  1.1.2.1  garbled }
    141  1.1.2.1  garbled 
    142  1.1.2.1  garbled int
    143  1.1.2.1  garbled genppc_pci_conf_hook(pci_chipset_tag_t pct, int bus, int dev, int func,
    144  1.1.2.1  garbled 	pcireg_t id)
    145  1.1.2.1  garbled {
    146  1.1.2.1  garbled 	return (PCI_CONF_DEFAULT);
    147  1.1.2.1  garbled }
    148  1.1.2.2  garbled 
    149  1.1.2.2  garbled int
    150  1.1.2.2  garbled genppc_pci_intr_map(struct pci_attach_args *pa, pci_intr_handle_t *ihp)
    151  1.1.2.2  garbled {
    152  1.1.2.2  garbled 	int pin = pa->pa_intrpin;
    153  1.1.2.2  garbled 	int line = pa->pa_intrline;
    154  1.1.2.2  garbled 
    155  1.1.2.2  garbled #if DEBUG
    156  1.1.2.2  garbled 	printf("%s: pin: %d, line: %d\n", __FUNCTION__, pin, line);
    157  1.1.2.2  garbled #endif
    158  1.1.2.2  garbled 
    159  1.1.2.2  garbled 	if (pin == 0) {
    160  1.1.2.2  garbled 		/* No IRQ used. */
    161  1.1.2.2  garbled 		aprint_error("pci_intr_map: interrupt pin %d\n", pin);
    162  1.1.2.2  garbled 		goto bad;
    163  1.1.2.2  garbled 	}
    164  1.1.2.2  garbled 
    165  1.1.2.2  garbled 	if (pin > 4) {
    166  1.1.2.2  garbled 		aprint_error("pci_intr_map: bad interrupt pin %d\n", pin);
    167  1.1.2.2  garbled 		goto bad;
    168  1.1.2.2  garbled 	}
    169  1.1.2.2  garbled 
    170  1.1.2.2  garbled 	/*
    171  1.1.2.2  garbled 	 * Section 6.2.4, `Miscellaneous Functions', says that 255 means
    172  1.1.2.2  garbled 	 * `unknown' or `no connection' on a PC.  We assume that a device with
    173  1.1.2.2  garbled 	 * `no connection' either doesn't have an interrupt (in which case the
    174  1.1.2.2  garbled 	 * pin number should be 0, and would have been noticed above), or
    175  1.1.2.2  garbled 	 * wasn't configured by the BIOS (in which case we punt, since there's
    176  1.1.2.2  garbled 	 * no real way we can know how the interrupt lines are mapped in the
    177  1.1.2.2  garbled 	 * hardware).
    178  1.1.2.2  garbled 	 *
    179  1.1.2.2  garbled 	 * XXX
    180  1.1.2.2  garbled 	 * Since IRQ 0 is only used by the clock, and we can't actually be sure
    181  1.1.2.2  garbled 	 * that the BIOS did its job, we also recognize that as meaning that
    182  1.1.2.2  garbled 	 * the BIOS has not configured the device.
    183  1.1.2.2  garbled 	 */
    184  1.1.2.2  garbled 	if (line == 0 || line == 255) {
    185  1.1.2.2  garbled 		aprint_error("pci_intr_map: no mapping for pin %c\n", '@' + pin);
    186  1.1.2.2  garbled 		goto bad;
    187  1.1.2.2  garbled 	} else {
    188  1.1.2.2  garbled 		if (line >= ICU_LEN) {
    189  1.1.2.2  garbled 			aprint_error("pci_intr_map: bad interrupt line %d\n", line);
    190  1.1.2.2  garbled 			goto bad;
    191  1.1.2.2  garbled 		}
    192  1.1.2.2  garbled 	}
    193  1.1.2.2  garbled 
    194  1.1.2.2  garbled 	*ihp = line;
    195  1.1.2.2  garbled 	return 0;
    196  1.1.2.2  garbled 
    197  1.1.2.2  garbled bad:
    198  1.1.2.2  garbled 	*ihp = -1;
    199  1.1.2.2  garbled 	return 1;
    200  1.1.2.2  garbled }
    201  1.1.2.2  garbled 
    202