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      1 /* $NetBSD: tsp_pci.c,v 1.12 2021/06/25 03:45:59 thorpej Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Ross Harvey.
     17  * 4. The name of Ross Harvey may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
     21  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
     23  * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
     24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 
     35 __KERNEL_RCSID(0, "$NetBSD: tsp_pci.c,v 1.12 2021/06/25 03:45:59 thorpej Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/systm.h>
     39 #include <sys/kernel.h>
     40 #include <sys/device.h>
     41 
     42 #include <dev/pci/pcireg.h>
     43 #include <dev/pci/pcivar.h>
     44 
     45 #include <machine/autoconf.h>
     46 #include <machine/rpb.h>
     47 
     48 #include <alpha/pci/tsreg.h>
     49 #include <alpha/pci/tsvar.h>
     50 
     51 #define tsp_pci() { Generate ctags(1) key. }
     52 
     53 static pcireg_t	tsp_conf_read(void *, pcitag_t, int);
     54 static void	tsp_conf_write(void *, pcitag_t, int, pcireg_t);
     55 
     56 void
     57 tsp_pci_init(pci_chipset_tag_t pc, void *v)
     58 {
     59 	pc->pc_conf_v = v;
     60 	pc->pc_conf_read = tsp_conf_read;
     61 	pc->pc_conf_write = tsp_conf_write;
     62 }
     63 
     64 /*
     65  * Tsunami makes this a lot easier than it used to be, automatically
     66  * generating type 0 or type 1 cycles, and quietly returning -1 with
     67  * no errors on unanswered probes.
     68  */
     69 static pcireg_t
     70 tsp_conf_read(void *cpv, pcitag_t tag, int offset)
     71 {
     72 	pcireg_t *datap, data;
     73 	struct tsp_config *pcp = cpv;
     74 
     75 	if ((unsigned int)offset >= PCI_CONF_SIZE)
     76 		return (pcireg_t) -1;
     77 
     78 	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
     79 	alpha_mb();
     80 	data = *datap;
     81 	alpha_mb();
     82 	return data;
     83 }
     84 
     85 static void
     86 tsp_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
     87 {
     88 	pcireg_t *datap;
     89 	struct tsp_config *pcp = cpv;
     90 
     91 	if ((unsigned int)offset >= PCI_CONF_SIZE)
     92 		return;
     93 
     94 	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
     95 	alpha_mb();
     96 	*datap = data;
     97 	alpha_mb();
     98 }
     99 
    100 #define NTH_STR(n, ...) ((const char *[]){ __VA_ARGS__ }[n])
    101 
    102 void
    103 tsp_print_error(unsigned int indent, unsigned long p_error)
    104 {
    105 	char buf[40];
    106 
    107 	if (PER_INV(p_error)) {
    108 		IPRINTF(indent, "data invalid\n");
    109 		return;
    110 	}
    111 
    112 	if (!PER_ERR(p_error))
    113 		return;
    114 
    115 	snprintb(buf, 40,
    116 		 "\177\20"
    117 		 "b\0Error lost\0"
    118 		 "b\1PCI SERR#\0"
    119 		 "b\2PCI PERR#\0"
    120 		 "b\3Delayed completion retry timeout\0"
    121 		 "b\4Invalid S/G page table entry\0"
    122 		 "b\5Address parity error\0"
    123 		 "b\6Target abort\0"
    124 		 "b\7PCI read data parity error\0"
    125 		 "b\10no PCI DEVSEL#\0"
    126 		 "b\11unknown\0"
    127 		 "b\12Uncorrectable ECC\0"
    128 		 "b\13Correctable ECC\0",
    129 		 PER_ERR(p_error));
    130 	IPRINTF(indent, "error    = %s\n", buf);
    131 
    132 	if (PER_ECC(p_error)) {
    133 		IPRINTF(indent, "address  = 0x%09lx\n", PER_SADR(p_error));
    134 		IPRINTF(indent, "command  = 0x%lx<%s>\n", PER_CMD(p_error),
    135 			NTH_STR(PER_CMD(p_error) & 0x3,
    136 				"DMA read", "DMA RMW", "?", "S/G read"));
    137 		IPRINTF(indent, "syndrome = 0x%02lx\n", PER_SYN(p_error));
    138 	} else {
    139 		IPRINTF(indent, "address  = 0x%08lx, 0x%lx<%s>\n",
    140 			PER_PADR(p_error), PER_TRNS(p_error),
    141 			NTH_STR(PER_TRNS(p_error), "No DAC", "DAC SG Win3",
    142 				"Monster Window", "Monster Window"));
    143 		IPRINTF(indent, "command  = 0x%lx<%s>\n", PER_CMD(p_error),
    144 			NTH_STR(PER_CMD(p_error),
    145 				"PCI IACK", "PCI special cycle",
    146 				"PCI I/O read", "PCI I/O write", "?",
    147 				"PCI PTP write", "PCI memory read",
    148 				"PCI memory write", "PCI CSR write",
    149 				"?", "?", "?", "?", "?", "?", "?"));
    150 	}
    151 }
    152