1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #include <linux/moduleparam.h> 4 #include "ipmi_si.h" 5 6 #define PFX "ipmi_hardcode: " 7 /* 8 * There can be 4 IO ports passed in (with or without IRQs), 4 addresses, 9 * a default IO port, and 1 ACPI/SPMI address. That sets SI_MAX_DRIVERS. 10 */ 11 12 #define SI_MAX_PARMS 4 13 14 static char *si_type[SI_MAX_PARMS]; 15 #define MAX_SI_TYPE_STR 30 16 static char si_type_str[MAX_SI_TYPE_STR]; 17 static unsigned long addrs[SI_MAX_PARMS]; 18 static unsigned int num_addrs; 19 static unsigned int ports[SI_MAX_PARMS]; 20 static unsigned int num_ports; 21 static int irqs[SI_MAX_PARMS]; 22 static unsigned int num_irqs; 23 static int regspacings[SI_MAX_PARMS]; 24 static unsigned int num_regspacings; 25 static int regsizes[SI_MAX_PARMS]; 26 static unsigned int num_regsizes; 27 static int regshifts[SI_MAX_PARMS]; 28 static unsigned int num_regshifts; 29 static int slave_addrs[SI_MAX_PARMS]; /* Leaving 0 chooses the default value */ 30 static unsigned int num_slave_addrs; 31 32 module_param_string(type, si_type_str, MAX_SI_TYPE_STR, 0); 33 MODULE_PARM_DESC(type, "Defines the type of each interface, each" 34 " interface separated by commas. The types are 'kcs'," 35 " 'smic', and 'bt'. For example si_type=kcs,bt will set" 36 " the first interface to kcs and the second to bt"); 37 module_param_hw_array(addrs, ulong, iomem, &num_addrs, 0); 38 MODULE_PARM_DESC(addrs, "Sets the memory address of each interface, the" 39 " addresses separated by commas. Only use if an interface" 40 " is in memory. Otherwise, set it to zero or leave" 41 " it blank."); 42 module_param_hw_array(ports, uint, ioport, &num_ports, 0); 43 MODULE_PARM_DESC(ports, "Sets the port address of each interface, the" 44 " addresses separated by commas. Only use if an interface" 45 " is a port. Otherwise, set it to zero or leave" 46 " it blank."); 47 module_param_hw_array(irqs, int, irq, &num_irqs, 0); 48 MODULE_PARM_DESC(irqs, "Sets the interrupt of each interface, the" 49 " addresses separated by commas. Only use if an interface" 50 " has an interrupt. Otherwise, set it to zero or leave" 51 " it blank."); 52 module_param_hw_array(regspacings, int, other, &num_regspacings, 0); 53 MODULE_PARM_DESC(regspacings, "The number of bytes between the start address" 54 " and each successive register used by the interface. For" 55 " instance, if the start address is 0xca2 and the spacing" 56 " is 2, then the second address is at 0xca4. Defaults" 57 " to 1."); 58 module_param_hw_array(regsizes, int, other, &num_regsizes, 0); 59 MODULE_PARM_DESC(regsizes, "The size of the specific IPMI register in bytes." 60 " This should generally be 1, 2, 4, or 8 for an 8-bit," 61 " 16-bit, 32-bit, or 64-bit register. Use this if you" 62 " the 8-bit IPMI register has to be read from a larger" 63 " register."); 64 module_param_hw_array(regshifts, int, other, &num_regshifts, 0); 65 MODULE_PARM_DESC(regshifts, "The amount to shift the data read from the." 66 " IPMI register, in bits. For instance, if the data" 67 " is read from a 32-bit word and the IPMI data is in" 68 " bit 8-15, then the shift would be 8"); 69 module_param_hw_array(slave_addrs, int, other, &num_slave_addrs, 0); 70 MODULE_PARM_DESC(slave_addrs, "Set the default IPMB slave address for" 71 " the controller. Normally this is 0x20, but can be" 72 " overridden by this parm. This is an array indexed" 73 " by interface number."); 74 75 int ipmi_si_hardcode_find_bmc(void) 76 { 77 int ret = -ENODEV; 78 int i; 79 struct si_sm_io io; 80 char *str; 81 82 /* Parse out the si_type string into its components. */ 83 str = si_type_str; 84 if (*str != '\0') { 85 for (i = 0; (i < SI_MAX_PARMS) && (*str != '\0'); i++) { 86 si_type[i] = str; 87 str = strchr(str, ','); 88 if (str) { 89 *str = '\0'; 90 str++; 91 } else { 92 break; 93 } 94 } 95 } 96 97 memset(&io, 0, sizeof(io)); 98 for (i = 0; i < SI_MAX_PARMS; i++) { 99 if (!ports[i] && !addrs[i]) 100 continue; 101 102 io.addr_source = SI_HARDCODED; 103 pr_info(PFX "probing via hardcoded address\n"); 104 105 if (!si_type[i] || strcmp(si_type[i], "kcs") == 0) { 106 io.si_type = SI_KCS; 107 } else if (strcmp(si_type[i], "smic") == 0) { 108 io.si_type = SI_SMIC; 109 } else if (strcmp(si_type[i], "bt") == 0) { 110 io.si_type = SI_BT; 111 } else { 112 pr_warn(PFX "Interface type specified for interface %d, was invalid: %s\n", 113 i, si_type[i]); 114 continue; 115 } 116 117 if (ports[i]) { 118 /* An I/O port */ 119 io.addr_data = ports[i]; 120 io.addr_type = IPMI_IO_ADDR_SPACE; 121 } else if (addrs[i]) { 122 /* A memory port */ 123 io.addr_data = addrs[i]; 124 io.addr_type = IPMI_MEM_ADDR_SPACE; 125 } else { 126 pr_warn(PFX "Interface type specified for interface %d, but port and address were not set or set to zero.\n", 127 i); 128 continue; 129 } 130 131 io.addr = NULL; 132 io.regspacing = regspacings[i]; 133 if (!io.regspacing) 134 io.regspacing = DEFAULT_REGSPACING; 135 io.regsize = regsizes[i]; 136 if (!io.regsize) 137 io.regsize = DEFAULT_REGSIZE; 138 io.regshift = regshifts[i]; 139 io.irq = irqs[i]; 140 if (io.irq) 141 io.irq_setup = ipmi_std_irq_setup; 142 io.slave_addr = slave_addrs[i]; 143 144 ret = ipmi_si_add_smi(&io); 145 } 146 return ret; 147 } 148