1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/types.h> 30 #include <sys/kmem.h> 31 #include <sys/async.h> 32 #include <sys/sysmacros.h> 33 #include <sys/sunddi.h> 34 #include <sys/sunndi.h> 35 #include <sys/ddi_impldefs.h> 36 #include <sys/ddi_implfuncs.h> 37 #include <sys/pci/pci_obj.h> 38 #include <sys/pci.h> 39 40 /*LINTLIBRARY*/ 41 42 static uint16_t 43 pcix_get_pcix_cap(ddi_acc_handle_t handle) 44 { 45 ushort_t caps_ptr, cap; 46 47 /* 48 * Walk the Capabilities List and locate 49 * the PCI-X Capability. 50 */ 51 if (pci_config_get16(handle, PCI_CONF_STAT) & PCI_STAT_CAP) 52 caps_ptr = pci_config_get8(handle, PCI_CONF_CAP_PTR); 53 else 54 caps_ptr = PCI_CAP_NEXT_PTR_NULL; 55 56 while (caps_ptr != PCI_CAP_NEXT_PTR_NULL) { 57 cap = pci_config_get8(handle, caps_ptr); 58 if (cap == PCI_CAP_ID_PCIX) 59 return (caps_ptr); 60 61 caps_ptr = pci_config_get8(handle, caps_ptr + PCI_CAP_NEXT_PTR); 62 } 63 64 return (0); 65 } 66 67 void 68 pcix_set_cmd_reg(dev_info_t *child, uint16_t value) 69 { 70 uint16_t pcix_cap_offset, pcix_cmd; 71 ddi_acc_handle_t handle; 72 73 if (pci_config_setup(child, &handle) != DDI_SUCCESS) 74 return; 75 76 /* 77 * Only modify the Command Register of non-bridge functions. 78 */ 79 if ((pci_config_get8(handle, PCI_CONF_HEADER) & 80 PCI_HEADER_TYPE_M) == PCI_HEADER_PPB) { 81 pci_config_teardown(&handle); 82 return; 83 } 84 85 pcix_cap_offset = pcix_get_pcix_cap(handle); 86 87 DEBUG1(DBG_INIT_CLD, child, 88 "pcix_set_cmd_reg: pcix_cap_offset = %x\n", pcix_cap_offset); 89 90 if (pcix_cap_offset) { 91 /* 92 * Read the PCI-X Command Register. 93 */ 94 pcix_cmd = pci_config_get16(handle, (pcix_cap_offset + 2)); 95 96 DEBUG1(DBG_INIT_CLD, child, 97 "pcix_set_cmd_reg: PCI-X CMD " 98 "Register (Before) %x\n", pcix_cmd); 99 100 pcix_cmd &= ~(0x1f << 2); /* clear bits 6-2 */ 101 pcix_cmd |= value; 102 103 DEBUG1(DBG_INIT_CLD, child, 104 "pcix_set_cmd_reg: PCI-X CMD " 105 "Register (After) %x\n", pcix_cmd); 106 107 pci_config_put16(handle, (pcix_cap_offset + 2), pcix_cmd); 108 } 109 110 pci_config_teardown(&handle); 111 } 112