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 #include <sys/types.h> 27 #include <sys/kmem.h> 28 #include <sys/async.h> 29 #include <sys/sysmacros.h> 30 #include <sys/sunddi.h> 31 #include <sys/sunndi.h> 32 #include <sys/ddi_impldefs.h> 33 #include <sys/ddi_implfuncs.h> 34 #include <sys/pci/pci_obj.h> 35 #include <sys/pci.h> 36 #include <sys/pci_cap.h> 37 38 /*LINTLIBRARY*/ 39 40 void 41 pcix_set_cmd_reg(dev_info_t *child, uint16_t value) 42 { 43 uint16_t pcix_cap_ptr, pcix_cmd; 44 ddi_acc_handle_t handle; 45 46 if (pci_config_setup(child, &handle) != DDI_SUCCESS) 47 return; 48 49 /* 50 * Only modify the Command Register of non-bridge functions. 51 */ 52 if ((pci_config_get8(handle, PCI_CONF_HEADER) & PCI_HEADER_TYPE_M) 53 == PCI_HEADER_PPB) 54 goto teardown; 55 56 if (PCI_CAP_LOCATE(handle, PCI_CAP_ID_PCIX, &pcix_cap_ptr) == 57 DDI_FAILURE) 58 goto teardown; 59 60 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: pcix_cap_ptr = %x\n", 61 pcix_cap_ptr); 62 63 /* 64 * Read the PCI-X Command Register. 65 */ 66 if ((pcix_cmd = PCI_CAP_GET16(handle, 0, pcix_cap_ptr, 2)) 67 == PCI_CAP_EINVAL16) 68 goto teardown; 69 70 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: PCI-X CMD Register " 71 "(Before) %x\n", pcix_cmd); 72 73 pcix_cmd &= ~(0x1f << 2); /* clear bits 6-2 */ 74 pcix_cmd |= value; 75 76 DEBUG1(DBG_INIT_CLD, child, "pcix_set_cmd_reg: PCI-X CMD Register " 77 "(After) %x\n", pcix_cmd); 78 79 PCI_CAP_PUT16(handle, 0, pcix_cap_ptr, 2, pcix_cmd); 80 81 teardown: 82 pci_config_teardown(&handle); 83 } 84