1 /* $NetBSD: imcsmb_var.h,v 1.1 2018/03/01 04:45:06 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Paul Goyette 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /*- 33 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 34 * 35 * Authors: Joe Kloss; Ravi Pokala (rpokala (at) freebsd.org) 36 * 37 * Copyright (c) 2017-2018 Panasas 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62 #ifndef _DEV__IMCSMB__IMCSMB_VAR_H_ 63 #define _DEV__IMCSMB__IMCSMB_VAR_H_ 64 65 #include <sys/param.h> 66 #include <sys/mutex.h> 67 #include <sys/bus.h> 68 69 #include <dev/i2c/i2cvar.h> 70 71 #include <dev/pci/pcivar.h> 72 /* #include <dev/pci/pcireg.h> PRG */ 73 74 /* A detailed description of this device is present in imcsmb_pci.c */ 75 76 /** 77 * The softc for a particular instance of the PCI device associated with a pair 78 * of iMC-SMB controllers. 79 * 80 * Ordinarily, locking would be done with a mutex. However, we might have an 81 * NVDIMM connected to this SMBus, and we might need to issue the SAVE command 82 * to the NVDIMM from a panic context. Mutex operations are not allowed while 83 * the scheduler is stopped, so just use a simple semaphore. 84 * 85 * If, as described in the manpage, additional steps are needed to stop/restart 86 * firmware operations before/after using the controller, then additional fields 87 * can be added to this softc. 88 */ 89 struct imc_softc { 90 device_t sc_dev; 91 device_t sc_smbchild[2]; 92 pcitag_t sc_pci_tag; /* pci config space info */ 93 pci_chipset_tag_t sc_pci_chipset_tag; 94 }; 95 96 void imcsmb_pci_release_bus(device_t dev); 97 int imcsmb_pci_request_bus(device_t dev); 98 99 /** 100 * PCI config registers for each individual SMBus controller within the iMC. 101 * Each iMC-SMB has a separate set of registers. There is an array of these 102 * structures for the PCI device, and one of them is passed to driver for the 103 * actual iMC-SMB as the IVAR. 104 */ 105 struct imcsmb_reg_set { 106 uint16_t smb_stat; 107 uint16_t smb_cmd; 108 uint16_t smb_cntl; 109 }; 110 111 /** 112 * The softc for the device associated with a particular iMC-SMB controller. 113 * There are two such controllers for each of the PCI devices. The PCI driver 114 * tells the iMC-SMB driver which set of registers to use via the IVAR. This 115 * technique was suggested by John Baldwin (jhb@). 116 */ 117 struct imcsmb_softc { 118 device_t sc_dev; 119 device_t sc_smbus; /* child smbusX interface */ 120 struct imcsmb_reg_set *sc_regs; /* regs for this controller */ 121 struct i2c_controller sc_i2c_tag; /* i2c tag info */ 122 pcitag_t sc_pci_tag; /* pci config space info */ 123 pci_chipset_tag_t sc_pci_chipset_tag; 124 kmutex_t sc_i2c_mutex; 125 }; 126 127 struct imc_attach_args { 128 int ia_unit; 129 struct imcsmb_reg_set *ia_regs; 130 pci_chipset_tag_t ia_pci_pc; 131 pcitag_t ia_pci_tag; 132 pci_chipset_tag_t ia_pci_chipset_tag; 133 134 }; 135 136 /* Interface for enable/disable BIOS or other motherboard access to IMC */ 137 138 typedef enum { 139 IMC_BIOS_ENABLE, 140 IMC_BIOS_DISABLE 141 } imc_bios_control ; 142 143 void imc_callback(struct imcsmb_softc *, imc_bios_control); 144 145 #endif /* _DEV__IMCSMB__IMCSMB_VAR_H_ */ 146
Indexes created Sat Sep 20 22:09:52 GMT 2025