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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <sys/types.h> 29 #include <sys/kmem.h> 30 #include <sys/async.h> 31 #include <sys/sysmacros.h> 32 #include <sys/sunddi.h> 33 #include <sys/sunndi.h> 34 #include <sys/ddi_impldefs.h> 35 #include <sys/ddi_implfuncs.h> 36 #include <sys/pci/pci_obj.h> 37 #include <sys/pci.h> 38 #include <sys/pci_cap.h> 39 40 /*LINTLIBRARY*/ 41 42 void 43 pcix_set_cmd_reg(dev_info_t *child, uint16_t value) 44 { 45 uint16_t pcix_cap_ptr, pcix_cmd; 46 ddi_acc_handle_t handle; 47 48 if (pci_config_setup(child, &handle) != DDI_SUCCESS) 49 return; 50 51 /* 52 * Only modify the Command Register of non-bridge functions. 53 */ 54 if ((pci_config_get8(handle, PCI_CONF_HEADER) & PCI_HEADER_TYPE_M) 55 == PCI_HEADER_PPB) 56 goto teardown; 57 58 if (PCI_CAP_LOCATE(handle, PCI_CAP_ID_PCIX, &pcix_cap_ptr) == 59 DDI_FAILURE) 60 goto teardown; 61 62 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: pcix_cap_ptr = %x\n", 63 pcix_cap_ptr); 64 65 /* 66 * Read the PCI-X Command Register. 67 */ 68 if ((pcix_cmd = PCI_CAP_GET16(handle, NULL, pcix_cap_ptr, 2)) 69 == 0xffff) 70 goto teardown; 71 72 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: PCI-X CMD Register " 73 "(Before) %x\n", pcix_cmd); 74 75 pcix_cmd &= ~(0x1f << 2); /* clear bits 6-2 */ 76 pcix_cmd |= value; 77 78 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: PCI-X CMD Register " 79 "(After) %x\n", pcix_cmd); 80 81 PCI_CAP_PUT16(handle, NULL, pcix_cap_ptr, 2, pcix_cmd); 82 83 teardown: 84 pci_config_teardown(&handle); 85 } 86